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. According to the utility model, the vacuum degree in the coating chamber can be ensured, the strip cannot be crushed, and the coating quality is improved.

Description

Technical Field

[0001] This utility model relates to the field of valve technology, specifically to an airbag valve device. Background Technology

[0002] Existing vacuum coating equipment typically has sealing structures between the unwinding chamber and the coating chamber, and between the coating chamber and the rewinding chamber. These sealing structures isolate the unwinding chamber and the coating chamber from each other, or between the coating chamber and the rewinding chamber. This ensures that changing the roll on the unwinding mechanism in the unwinding chamber or changing the rewinding drum on the rewinding mechanism in the rewinding chamber does not affect the vacuum level in the coating chamber. After changing the roll or the rewinding drum, it is not necessary to evacuate the coating chamber again, which reduces the coating cycle and improves production efficiency.

[0003] The sealing structure generally adopts a narrow slit through which the strip material, such as PET film, passes, as described in Chinese Patent CN204644456U, or a vacuum lock as described in Chinese Patent CN105349961B. The valve cover is driven downward by the valve cover drive mechanism of the vacuum lock so that the bottom surface of the valve cover is tightly pressed against the top surface of the valve seat and the strip material, thereby sealing the inlet end of the inclined through hole and isolating the two adjacent chambers from each other.

[0004] Using a narrow slit method results in poor sealing and often leads to air leakage, making it impossible to guarantee the vacuum level within the coating chamber. Using a vacuum lock method provides a good seal, eliminating air leakage and ensuring the vacuum level within the coating chamber. However, because both the valve cover and seat are made of stainless steel, the bottom surface of the valve cover tightly pressing against the top surface of the valve seat and the strip can easily damage the strip, thus affecting the coating quality. Utility Model Content

[0005] To overcome the shortcomings of the existing technology, this utility model provides an airbag valve device with good sealing effect, which will not cause air leakage, can ensure the vacuum degree in the coating chamber, and will not damage the strip, thus improving the coating quality.

[0006] The technical solution adopted by this utility model to solve its technical problem is:

[0007] An airbag valve device includes a valve body, an airbag tube, two valve covers, and a valve core tube. The valve body has cavities extending through its two ends and valve body channels extending through its two sides. The valve body channels communicate with the cavities and are located on one side of the middle of the cavities. The airbag tube is disposed within the cavities, and a first gap exists between the outer wall of the airbag tube and the inner wall of the cavities. A gap exists between the airbag tube and the inner wall of the valve body channel at the end away from the middle of the cavities. The two valve covers are respectively disposed at both ends of the valve body, and the two valve cover portions are respectively sleeved on the airbag. The two ends of the tube are respectively sealed to the inner walls of the two ends of the airbag tube. The valve core tube is disposed inside the airbag tube. The two ends of the valve core tube are respectively connected to two valve covers. At least one of the two valve covers is provided with an air inlet / outlet hole. The air inlet / outlet hole communicates 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 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 a through hole. The through hole communicates with the interior of the valve core tube and the interior of the airbag tube respectively.

[0008] As a preferred technical solution, the wall thickness of the portion of the airbag tube facing the valve body channel is less than the wall thickness of the other portions 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 channel, so that the wall thickness of the part of the airbag tube facing the valve body channel is less than the wall thickness of the other parts of the airbag tube.

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

[0011] As a preferred technical solution, the width of the first gap and the second gap is 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 portions gradually increases in the direction away from the airbag tube body. The cavity of the valve body includes a first part and two second parts respectively connected to the two ends of the first part. The shape of the first part is adapted to the shape of the airbag tube body, and the shape of the second part is adapted to the shape of the tapered portions. The airbag tube body is disposed in the first part, and the two tapered portions are respectively disposed in the two second parts. The valve cover includes a first mounting part, a connecting part, and a second mounting part connected in sequence. The first mounting parts of the two valve covers are respectively sealed at both ends of the valve body. The shape of the connecting part is adapted to the shape of the tapered portion. The connecting parts of the two valve covers are respectively sleeved in the two tapered portions and respectively sealed to the inner walls of the two tapered portions. The two ends of the valve core tube are respectively sealed to the second mounting parts of the two valve covers. In the two valve covers, at least one valve cover has the inlet and outlet holes in its first mounting part, connecting part, and second mounting part.

[0013] As a preferred technical solution, the two ends of the valve core tube are respectively threaded to the second mounting parts of the two valve covers; a sealing ring is provided at one end of the first mounting part near the connection part, the cavity is located inside the sealing ring, and the sealing rings of the two valve covers abut against the end faces of the two valve bodies respectively.

[0014] As a preferred technical solution, the through hole faces the valve body channel, and there are one or more through holes, with multiple through holes spaced apart along the axial direction of the valve core tube.

[0015] As a preferred technical solution, at least one of the two valve covers has an air source connector at the end of the valve cover away from the valve body, which is located at the position corresponding to the air inlet and outlet, and the air source connector is connected to the air inlet and outlet.

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

[0017] The beneficial effects of this invention are as follows: This invention, through the design of a valve body, air bladder tube, two valve covers, and a valve core tube, utilizes the expansion of the air bladder tube to press the strip tightly against the inner wall of the valve body channel at the end furthest from the center of the cavity. This provides a good seal, preventing air leakage and ensuring the vacuum level within the coating chamber. Furthermore, the strip is not damaged, thus guaranteeing coating quality. Additionally, the valve core tube is positioned inside the air bladder tube, with a second gap between its outer wall and the inner wall of the air bladder tube, or the outer wall of the valve core tube is in close contact with the inner wall of the air bladder tube. This results in a relatively small internal space within the air bladder tube. This allows the air bladder tube to expand or contract rapidly when compressed air is injected or expelled, reducing the amount of air required and improving production efficiency. Attached Figure Description

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

[0019] Figure 1 This is a schematic diagram of the structure of an airbag valve device provided in one embodiment of the present invention;

[0020] Figure 2 yes Figure 1 A side view of the airbag valve device shown.

[0021] Figure 3 yes Figure 1 A cross-sectional view of the airbag valve device from a first angle.

[0022] Figure 4 yes Figure 3 A magnified view of a portion at point A shown;

[0023] Figure 5 yes Figure 1 A cross-sectional view of the airbag valve device shown from a second angle;

[0024] Figure 6 yes Figure 1 An exploded schematic diagram of the airbag valve device shown.

[0025] Figure 7 yes Figure 1 A schematic diagram of the airbag tube of the airbag valve device shown;

[0026] Figure 8 yes Figure 1 The diagram shows the structure of the valve core tube of the airbag valve device.

[0027] Figure label:

[0028] 10. Valve body; 11. Cavity; 12. Valve body channel; 20. Airbag tube; 21. Airbag tube groove; 22. Airbag tube body; 23. Conical part; 30. Valve cover; 31. First mounting part; 32. Connecting part; 33. Second mounting part; 34. Air inlet / outlet port; 40. Valve core tube; 41. Through hole; 50. Air source connector. Detailed Implementation

[0029] The following will clearly and completely describe the concept, specific structure, and technical effects of this utility model in conjunction with embodiments and accompanying drawings, so as to fully understand the purpose, features, and effects of this utility model. Obviously, the described embodiments are only a part of the embodiments of this utility model, not all of them. Other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are all within the scope of protection of this utility model. Furthermore, all connections / linkages involved in the patent do not simply refer to direct contact between components, but rather to the ability to form a better connection structure by adding or reducing connecting accessories according to specific implementation conditions. The various technical features in this utility model can be combined interactively without contradicting each other.

[0030] Please refer to Figures 1 to 8 An embodiment of the present invention provides an airbag valve device, comprising 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 that extends through both ends of the valve body and a valve body channel 12 that extends through both sides of the valve body. The valve body channel 12 is connected to 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 disposed within the cavity 11, and a first gap (not shown in the figure) exists between the outer wall of the airbag tube 20 and the inner wall of the cavity 11. A gap exists between the airbag tube 20 and the inner wall of the valve body channel 12 at the end furthest from the center of the cavity 11, allowing a strip material, such as PET film, to pass through. Two valve covers 30 are respectively sealed at both ends of the valve body 10. The two valve covers 30 are partially fitted inside both ends of the airbag tube 20 and sealed to the inner walls of both ends of the airbag tube 20, thus preventing compressed air filled into the airbag tube 20 from leaking out between the valve covers 30 and the valve body 10.

[0033] The valve core tube 40 is coaxially disposed inside the airbag tube 20, and its two ends are respectively sealed to two valve covers 30. A second gap exists 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 has a through hole 41, which communicates with the interior of both the airbag tube 20 and the valve core tube 40. Each of the two valve covers 30 has an axially extending air inlet / outlet hole 34, which communicates with the interior of the valve core tube 40. In this embodiment, an air source connector 50 is provided at the end of the valve cover 30 furthest from the valve body 10, corresponding to the air inlet / outlet hole 34. The air source connector 50 communicates with the air inlet / outlet hole 34 and is used to connect to an inflation / deflation device. By sealing both ends of the valve core tube 40 to the two valve covers 30, it is ensured that the compressed air injected into the air inlet / outlet hole 34 directly enters the valve core tube 40, and not directly into the airbag tube 20.

[0034] There are multiple through holes 41, for example, five, which are distributed at intervals along the axial direction of the valve core tube 40. Understandably, the number of through holes 41 can also be, for example, one, two, three, four, six, etc., which can be set according to the actual situation.

[0035] In other embodiments, the outer wall of the valve core tube 40 and the inner wall of the airbag tube 20 are in contact.

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

[0037] With the above structure, in practical applications, the strip passes through the gap between the air bladder tube 20 and the inner wall of the valve body channel 12 at the end furthest from the center of the cavity 11. Taking the air bladder valve device between the unwinding chamber and the coating chamber as an example, when the strip is almost unwound and needs to be changed on the unwinding mechanism in the unwinding chamber, compressed air is first injected 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 via the air inflation / deflation device. Then, the compressed air enters the valve core tube 40 and then enters the air bladder tube 20 through the through hole 41. This achieves the injection of compressed air into the air bladder tube 20. Under the compression of the compressed air, the air bladder tube 20 expands. The other parts of the air bladder tube 20 will compress the inner wall of the cavity 11, and the part of the air bladder tube 20 facing the valve body channel 12 will expand towards the inner wall of the valve body channel 12 at the end furthest from the center of the cavity 11, thereby... The strip can be pressed against the inner wall of the valve body channel 12 at the end away from the middle of the cavity 11, thus achieving a seal. The unwinding chamber and the coating chamber are isolated from each other and are not connected. Then, the unwinding mechanism in the unwinding chamber can be used for roll changing. After completion, the air is released from the inside of the airbag tube 20 through the air source connectors 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 via the air inflation / deflation device. This releases the compressed air from the airbag tube 20. After the compressed air in the airbag tube 20 is completely released, the airbag tube 20 contracts and returns to its original shape because it is no longer squeezed by the compressed air. The part of the airbag tube 20 facing the valve body channel 12 will loosen the strip. At this time, the unwinding chamber and the coating chamber are connected through the valve body channel 12, and the strip can be unwound through the unwinding mechanism in the unwinding chamber. When the strip is almost finished winding and it is necessary to change the winding drum in the winding chamber, simply follow the steps described above to inflate and deflate the airbag valve device between the coating chamber and the winding chamber.

[0038] This invention utilizes a valve body 10, an air bladder tube 20, two valve covers 30, and a valve core tube 40. The air bladder tube 20 expands to press the strip tightly against the inner wall of the valve body channel 12 at the end furthest from the center of the cavity 11, resulting in a good seal and preventing air leakage. This ensures the vacuum level within the coating chamber and prevents damage to the strip, guaranteeing coating quality. Furthermore, the valve core tube 40 is positioned inside the air bladder tube 20, with a second gap between its outer wall and the inner wall of the air bladder tube 20, or the outer wall of the valve core tube 40 is in close contact with the inner wall of the air bladder tube 20. This results in a relatively small internal space within the air bladder tube 20. This allows the air bladder tube 20 to expand or contract rapidly when compressed air is injected or discharged, reducing the amount of air required and improving production efficiency. Meanwhile, the air inlet and outlet holes 34 of the two valve covers 30 and the multiple through holes 41 are distributed axially along the valve core tube 40, thereby enabling bidirectional inflation and ensuring that the airbag tube 20 is subjected to uniform force. This prevents the deformation center from shifting to one end of the airbag tube 20, allowing the airbag tube 20 to completely press the strip against the inner wall of the valve body channel 12 away from the middle of the cavity 11, preventing air leakage and ensuring good sealing performance. Furthermore, it increases the inflation and deflation speeds, thereby further increasing the expansion or contraction speed of the airbag tube 20 and thus further improving production efficiency.

[0039] In this embodiment, the wall thickness of the portion of the airbag tube 20 facing the valve body channel 12 is less than the wall thickness of the other portions of the airbag tube 20. When compressed air is filled into the airbag tube 20 or compressed air is discharged from the airbag tube 20, the speed at which the inner wall of the portion of the airbag tube 20 facing the valve body channel 12 expands or contracts away from the middle of the cavity 11 can be increased, further improving production efficiency.

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

[0041] The wall thickness of the portion of the airbag tube 20 facing the valve body channel 12 is 500 μm to 1 mm, preferably 1 mm, while the wall thickness of the other portions of the airbag tube 20 is 1-2 mm, preferably 2 mm. This value can increase the rate of expansion or contraction of the inner wall of the end of the airbag tube 20 facing the valve body channel 12 away from the center of the cavity 11.

[0042] The airbag tube 20 is a rubber tube that can achieve a soft seal with good sealing effect. Even if the surface of the strip is uneven or contains sand, debris, corrosive substances or other media, the airbag tube 20 can still completely press the strip against the inner wall of the valve body channel 12 away from the middle of the cavity 11 for sealing.

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

[0044] The width of the first gap and the second gap is 2-5 mm, preferably 3 mm. This value allows the airbag tube 20 to expand or contract quickly and reduces the amount of air required.

[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 portions 23 gradually increases in the direction away from the airbag tube body 22. The cavity 11 of the valve body 10 includes 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 22, and the shape of the second part is adapted to the shape of the tapered portions 23. The airbag tube body 22 is coaxially disposed in the first part, and the two tapered portions 23 are respectively coaxially disposed in the two second parts. 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 part 31, a connecting part 32, and a second mounting part 33 connected in sequence. The first mounting parts 31 of the two valve covers 30 are respectively sealed at both ends of the valve body 10, and the shape of the connecting part 32 is adapted to the shape of the tapered portion 23. The connecting portions 32 of the two valve covers 30 are respectively fitted inside the two conical portions 23 and are respectively sealed to the two conical portions 23. The sealing connection is, for example, by an interference fit between the outer wall of the connecting portion 32 and the inner wall of the corresponding conical portion 23. The two ends of the valve core tube 40 are respectively sealed 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 two valve covers 30 are respectively provided with the air inlet and outlet holes 34, the first mounting portion 31, the connecting portion 32 and the second mounting portion 33 of the two valve covers 30 are respectively provided with the air inlet and outlet holes 34, and the end of the first mounting portion 31 of the two valve covers 30 away from the connecting portion 32 is provided with the air source connector 50 at the position corresponding to the air inlet and outlet hole 34. When only one valve cover 30 has the air inlet / outlet port 34, the first mounting portion 31, the connecting portion 32, and the second mounting portion 33 of the valve cover 30 are provided with the air inlet / outlet port 34, and the end of the first mounting portion 31 of the valve cover 30 away from the connecting portion 32 is provided with the air source connector 50 at the position corresponding to the air inlet / outlet port 34. With this structure of valve body 10, air bladder tube 20, and valve cover 30, the sealing effect is good, and it is convenient to assemble air bladder tube 20 and valve body 10 together, assemble air bladder tube 20 and two valve covers 30 together, and assemble valve core tube 40, air bladder tube 20, and two valve covers 30 together.

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

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

[0048] The first mounting part 31 has an annular groove at one end near the connecting part 32. The cavity 11 is located inside the annular groove. The sealing ring is disposed in the annular groove, and the sealing ring part extends out from 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 respectively sealed to the second mounting parts 33 of the two valve covers 30. The sealing connection adopts a threaded connection. Specifically, the outer wall of the second mounting part 33 is provided with external threads, 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 threaded to the external threads of the second mounting parts 33 of the two valve covers 30.

[0050] Furthermore, the through hole 41 faces the valve body channel 12, which can further increase the speed of expansion or contraction of the inner wall of the part of the airbag tube 20 facing the valve body channel 12 away from the middle of the cavity 11.

[0051] The above is a detailed description of the preferred embodiments of the present utility model. However, the present utility model is not limited to the described embodiments. Those skilled in the art can make various equivalent modifications or substitutions without departing from the spirit of the present utility model. All such equivalent modifications or substitutions are included within the scope defined by the claims of this application.

Claims

1. An airbag valve device, characterized in that, The valve includes a valve body, an air bladder tube, two valve covers, and a valve core tube. The valve body has cavities extending through both ends and valve body channels extending through both sides. The valve body channels communicate with the cavities and are located on one side of the middle of the cavities. The air bladder tube is disposed within the cavities, and there is a first gap between the outer wall of the air bladder tube and the inner wall of the cavity. There is also a gap between the air bladder tube and the inner wall of the valve body channel at the end furthest from the middle of the cavity. The two valve covers are respectively disposed at both ends of the valve body, and the two valve cover portions are respectively fitted onto both ends of the air bladder tube. The valve core tube is sealed to the inner walls of both ends of the airbag tube. The valve core tube is located inside the airbag tube. Both ends of the valve core tube are connected to two valve covers. At least one of the valve covers has an air inlet / outlet hole that communicates 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 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 has a through hole that communicates with the interior of the valve core tube and the interior of the airbag 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 less than the wall thickness of the other portions of the airbag tube.

3. The airbag valve device according to claim 2, characterized in that, The inner wall of the airbag tube has an airbag tube groove at the 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 less than the wall thickness of the 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 500μm-1mm, and the wall thickness of the other portions of the airbag tube is 1-2mm.

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

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

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

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, with multiple through holes spaced apart along the axial direction of the valve core tube.

9. The airbag valve device according to claim 1, characterized in that, Of the two valve covers, at least one valve cover has an air source connector at the end furthest from the valve body, corresponding to the air inlet / outlet, and the air source connector is connected to the air inlet / outlet.

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

Images