Emergency valve and air control valve with same

Abstract

The utility model provides an emergency valve and an air control valve with the emergency valve, and the emergency valve comprises a valve body which is provided with an air inlet and an air outlet; the emergency valve element is movably arranged in the valve body, an inner cavity of the valve body is divided into an emergency upper cavity and an emergency lower cavity by the emergency valve element, the air inlet and the air outlet are formed in the emergency lower cavity, and the emergency valve element is provided with an inner hole communicating the emergency upper cavity with the emergency lower cavity; the dust filtering sleeve comprises a dust filtering cylinder and a dust filtering plate, the dust filtering cylinder is arranged in the inner hole in a penetrating mode, the outer wall of the dust filtering cylinder is attached to the hole wall of the inner hole, the dust filtering plate is arranged in the dust filtering cylinder, and the outer edge of the dust filtering plate is connected with the inner wall of the dust filtering cylinder. Through the technical scheme provided by the invention, the problem that the inner hole of the valve rod is easy to block in the prior art can be solved.

Description

Technical Field

[0001] The utility model relates to the technical field of trains, in particular to an emergency valve and an air control valve having the emergency valve. Background Art

[0002] The air control valve is the core component of the railway train braking system. It controls the train to produce braking and release functions. It, together with the auxiliary air cylinder, acceleration and release air cylinder and brake cylinder, constitutes the railway freight car braking system. During the normal operation of the train, the braking system is used to accelerate, decelerate and brake the train. When an unexpected situation occurs on the train, the braking system is used to control the train to stop by emergency braking.

[0003] In the related art, the air control valve includes an emergency valve. The emergency valve includes a valve body, an emergency valve core and a vent valve core. The emergency valve core and the vent valve core are both arranged in the valve body. The emergency valve core divides the inner cavity of the valve body into an emergency upper cavity and an emergency lower cavity. In order to filter the pressurized air entering the emergency upper cavity, a dust filter cartridge with openings at both ends and a cylindrical structure is installed in the inner hole. The dust filter cartridge is located at the shrinkage hole on the side wall of the emergency valve core. When inflating, the train pipe enters the emergency upper cavity through the emergency lower cavity, the inner hole of the emergency valve core and the shrinkage hole. When exhausting, the vent valve core is driven by the emergency valve core to move and open the vent port of the valve body, so as to realize emergency exhaust of the emergency upper cavity and the emergency lower cavity, so as to realize emergency braking of the train.

[0004] During inflation, the emergency valve core is located above the valve body, and the dust filter can filter the air entering the emergency upper chamber. However, due to the pressure difference, during exhaust, the emergency valve core moves downward, and the pressurized air in the emergency upper chamber can enter the inner hole through the upper end of the inner hole. At this time, the dust filter cannot filter the air, which can easily block the inner hole. Utility Model Content

[0005] The utility model provides an emergency valve and an air control valve having the same, so as to solve the problem that the inner hole of the valve stem is easily blocked in the related technology.

[0006] According to one aspect of the utility model, an emergency valve is provided, which includes: a valve body, having an air inlet and an exhaust port; an emergency valve core, movably arranged in the valve body, the emergency valve core divides the inner cavity of the valve body into an emergency upper cavity and an emergency lower cavity, the air inlet and the exhaust port are both arranged in the emergency lower cavity, and the emergency valve core has an inner hole connecting the emergency upper cavity and the emergency lower cavity; a dust filter sleeve, including a dust filter cartridge and a dust filter plate, the dust filter cartridge is passed through the inner hole, the outer wall of the dust filter cartridge is fitted with the hole wall of the inner hole, the dust filter plate is arranged in the dust filter cartridge, and the outer edge of the dust filter plate is connected to the inner wall of the dust filter cartridge.

[0007] Furthermore, both sides of the dust filter plate do not protrude from the dust filter cylinder.

[0008] Furthermore, the ratio between the thickness of the dust filter plate and the thickness of the wall of the dust filter cartridge is between 0.8 and 1.2.

[0009] Furthermore, the ratio between the diameter of the dust filter plate and the outer diameter of the dust filter cartridge is between 0.6 and 0.8.

[0010] Furthermore, the dust filter sleeve is made of alloy powder.

[0011] Furthermore, the dust filter cartridge and the dust filter plate are integrally formed.

[0012] Furthermore, the dust filter sleeve is a centrally symmetrical structure.

[0013] Furthermore, the emergency valve core is provided with an installation groove, the groove wall of the installation groove forms a hole wall of part of the inner hole, and the emergency valve also includes a pressure ring, the dust filter sleeve is located in the installation groove, the pressure ring is pressed above the dust filter sleeve and connected to the emergency valve core.

[0014] Furthermore, the emergency valve also includes a spring located in the emergency lower chamber, and two ends of the spring are respectively in contact with the inner wall of the valve body and the emergency valve core, and the spring can provide a reset force for the emergency valve core to connect the inlet of the inner hole with the emergency lower chamber, and the side wall of the emergency valve core has an air inlet groove, one end of the air inlet groove is connected with the emergency upper chamber, and the other end of the air inlet groove is connected with the inner hole through the dust filter sleeve; and / or, the emergency valve core includes a valve stem and a diaphragm, the valve stem extends vertically and is movably arranged, the diaphragm extends horizontally, the inner edge of the diaphragm is connected to the valve stem, and the outer edge of the diaphragm is connected to the valve body, so as to set the valve body The inner cavity is divided into an emergency upper cavity and an emergency lower cavity; the valve body has an air vent, the air inlet and the air exhaust port are both arranged on the side wall of the valve body, the air vent is arranged in the valve body, the emergency valve also includes an air vent valve core located below the emergency valve core, the air vent valve core is movably arranged in the valve body, the air vent valve core has an open position and a closed position, when the air vent valve core is in the open position, the air vent valve core opens the air vent to connect the air inlet and the exhaust port, when the air vent valve core is in the closed position, the air vent valve core blocks the air vent, and the emergency valve core can drive the air vent valve core to move between the open position and the closed position.

[0015] According to another aspect of the utility model, an air control valve is provided, and the air control valve includes the emergency valve provided above.

[0016] By applying the technical solution of the utility model, the emergency valve includes a valve body, an emergency valve core and a dust filter sleeve. When the emergency valve is inflated, the train pipe enters the emergency lower chamber through the air inlet of the valve body, and enters the emergency upper chamber through the inner hole of the emergency valve core. Since the dust filter sleeve is arranged in the inner hole, the outer wall of the dust filter cylinder fits with the hole wall of the inner hole, and the dust filter plate and the dust filter cylinder can filter the pressurized air entering the inner hole. When the emergency valve is exhausted, the pressurized air in the emergency upper chamber enters the emergency lower chamber through the inner hole, and is discharged out of the valve body through the exhaust port. The dust filter plate and the dust filter cylinder can filter the pressurized air entering the inner hole. Therefore, the dust filter sleeve can be used to filter the pressurized air during both inflation and exhaust, so that the inner hole will not be blocked. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The drawings constituting part of the present application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention. In the drawings:

[0018] Figure 1 A cross-sectional view of a dust filter sleeve provided according to an embodiment of the utility model is shown;

[0019] Figure 2 A cross-sectional view of an emergency valve provided according to an embodiment of the utility model is shown;

[0020] Figure 3 Another cross-sectional view of the emergency valve provided according to the embodiment of the utility model is shown.

[0021] The above drawings include the following reference numerals:

[0022] 10. Valve body; 11. Emergency upper chamber; 12. Emergency lower chamber; 13. Air inlet; 14. Air outlet; 15. Exhaust outlet;

[0023] 20. Emergency valve core; 21. Valve stem; 22. Diaphragm; 23. Inner hole;

[0024] 30. dust filter sleeve; 31. dust filter cartridge; 32. dust filter plate;

[0025] 40. Pressure ring;

[0026] 50. Spring;

[0027] 60. Vent valve core. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is by no means a limitation on the utility model and its application or use. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.

[0029] like Figures 1 to 3 As shown, an embodiment of the utility model provides an emergency valve, which includes a valve body 10, an emergency valve core 20, and a dust filter sleeve 30. The valve body 10 has an air inlet 13 and an exhaust port 15. The emergency valve core 20 is movably arranged in the valve body 10. The emergency valve core 20 divides the inner cavity of the valve body 10 into an emergency upper cavity 11 and an emergency lower cavity 12. The air inlet 13 and the exhaust port 15 are both arranged in the emergency lower cavity 12. The emergency valve core 20 has an inner hole 23 connecting the emergency upper cavity 11 and the emergency lower cavity 12; the dust filter sleeve 30 includes a dust filter cartridge 31 and a dust filter plate 32. The dust filter cartridge 31 is penetrated in the inner hole 23, and the outer wall of the dust filter cartridge 31 is in contact with the hole wall of the inner hole 23. The dust filter plate 32 is arranged in the dust filter cartridge 31, and the outer edge of the dust filter plate 32 is connected to the inner wall of the dust filter cartridge 31.

[0030] By applying the technical solution of the utility model, the emergency valve includes a valve body 10, an emergency valve core 20 and a dust filter sleeve 30. When the emergency valve is inflated, the train pipe enters the emergency lower chamber 12 through the air inlet 13 of the valve body 10, and enters the emergency upper chamber 11 through the inner hole 23 of the emergency valve core 20. Since the dust filter sleeve 30 is arranged in the inner hole 23, the outer wall of the dust filter cylinder 31 fits with the hole wall of the inner hole 23, and the dust filter plate 32 and the dust filter cylinder 31 can filter the pressure air entering the inner hole 23. When the emergency valve is exhausted, the pressure of the train pipe decreases rapidly, and the pressure air in the emergency upper chamber 11 enters the emergency lower chamber 12 through the inner hole 23, and is discharged from the valve body 10 through the exhaust port 15. The dust filter plate 32 and the dust filter cylinder 31 can filter the pressure air entering the inner hole 23. Therefore, during inflation and exhaust, the dust filter sleeve 30 can be used to filter the pressure air, so that the inner hole 23 will not be blocked.

[0031] It should be noted that in order to ensure the driving pressure difference between the emergency upper chamber 11 and the emergency lower chamber 12, the inner hole 23 has a small-diameter shrinkage hole, through which the pressure air entering and leaving the emergency upper chamber 11 can be reduced. In the related technology, when exhausting, the pressure air in the emergency upper chamber 11 can enter the inner hole 23 through the upper end of the inner hole 23, thereby blocking the shrinkage hole.

[0032] Of course, the dust filter sleeve 30 can also be set as a dust filter plate 32, so that the outer edge of the dust filter plate 32 fits against the hole wall of the inner hole 23, and the dust filter plate 32 is used to filter the pressurized air entering and exiting the emergency upper chamber 11.

[0033] like Figure 1 As shown, both sides of the dust filter plate 32 do not protrude from the dust filter cylinder 31. With the above structure, the thickness of the dust filter plate 32 can be reduced, so that the compressed air has a suitable circulation speed, and the installation of the dust filter sleeve 30 is convenient.

[0034] In this embodiment, the ratio between the thickness of the dust filter plate 32 and the thickness of the wall of the dust filter tube 31 is between 0.8 and 1.2. With the above ratio range, the compressed air is filtered and has a suitable circulation speed while ensuring the structural strength of the dust filter sleeve 30.

[0035] The ratio of the thickness of the dust filter plate 32 to the thickness of the wall of the dust filter cartridge 31 may be 0.8, 0.9, 1.0, 1.1, 1.2, or any value between 0.8 and 1.2.

[0036] In this embodiment, the ratio between the diameter of the dust filter plate 32 and the outer diameter of the dust filter cylinder 31 is between 0.6 and 0.8. With the above ratio range, the compressed air is filtered and has a suitable circulation speed while ensuring the structural strength of the dust filter sleeve 30.

[0037] The ratio between the diameter of the dust filter plate 32 and the outer diameter of the dust filter cartridge 31 may be 0.6, 0.7, 0.8, or any value between 0.8 and 1.2.

[0038] In this embodiment, the size of the dust filter cartridge 31 adopts the existing size, and the dust filter plate 32 is designed and arranged in the dust filter cartridge 31 .

[0039] Specifically, the dust filter sleeve 30 is made of alloy powder. The above material can ensure structural strength and have good filtering accuracy.

[0040] The dust filter cylinder 31 and the dust filter plate 32 are integrally formed. The above structure has the advantage of being easy to process.

[0041] Specifically, the dust filter sleeve 30 is a central symmetrical structure. With the above structure, the dust filter sleeve 30 has a suitable structural strength, and the dust filter sleeve 30 is easy to design.

[0042] In this embodiment, the dust filter sleeve 30 is an H-shaped structure.

[0043] like Figure 2As shown, the emergency valve core 20 is provided with a mounting groove, the groove wall of the mounting groove forms a part of the hole wall of the inner hole 23, and the emergency valve further includes a pressing ring 40, the dust filter sleeve 30 is located in the mounting groove, and the pressing ring 40 is pressed above the dust filter sleeve 30 and connected to the emergency valve core 20. With the above structure, the dust filter sleeve 30 can be positioned by using the mounting groove, and the dust filter sleeve 30 can be fixed by using the pressing ring 40, so that the dust filter sleeve 30 is more stable in the emergency valve core 20.

[0044] like Figure 2 As shown, the emergency valve also includes a spring 50 located in the emergency lower chamber 12, and the two ends of the spring 50 are respectively abutted against the inner wall of the valve body 10 and the emergency valve core 20. The spring 50 can provide a reset force for the emergency valve core 20 so that the inlet of the inner hole 23 is connected to the emergency lower chamber 12. The side wall of the emergency valve core 20 has an air intake groove, one end of the air intake groove is connected to the emergency upper chamber 11, and the other end of the air intake groove is connected to the inner hole 23 through the dust filter sleeve 30. With the emergency valve of the above structure, when the emergency valve is inflated, due to the reset force provided by the spring 50, the emergency valve core 20 moves upward, and the upper end of the emergency valve core 20 fits against the inner wall of the emergency upper chamber 11, and the pressurized air enters the emergency upper chamber 11 through the emergency lower chamber 12, the inner hole 23, the dust filter sleeve 30 and the air intake groove. When the emergency valve is exhausted, since the pressure in the emergency upper chamber 11 is greater than the pressure in the emergency lower chamber 12, the emergency valve core 20 moves downward, and the pressurized air in the emergency upper chamber 11 enters the inner hole 23 through the upper end of the emergency valve core 20 and the air inlet groove, and enters the emergency lower chamber 12 through the dust filter sleeve 30.

[0045] In this embodiment, the emergency valve core 20 includes a valve stem 21 and a diaphragm 22, the valve stem 21 extends vertically and is movably arranged, the diaphragm 22 extends horizontally, the inner edge of the diaphragm 22 is connected to the valve stem 21, and the outer edge of the diaphragm 22 is connected to the valve body 10, so as to separate the inner cavity of the valve body 10 into an emergency upper cavity 11 and an emergency lower cavity 12. The emergency valve core 20 adopting the above structure has the advantages of simple structure and easy processing.

[0046] Specifically, the valve body 10 has an air vent 14, the air inlet 13 and the air outlet 15 are both arranged on the side wall of the valve body 10, and the air vent 14 is arranged in the valve body 10. The emergency valve also includes an air vent valve core 60 located below the emergency valve core 20, and the air vent valve core 60 is movably arranged in the valve body 10. The air vent valve core 60 has an open position and a closed position. When the air vent valve core 60 is in the open position, the air vent valve core 60 opens the air vent 14 to connect the air inlet 13 and the air outlet 15. When the air vent valve core 60 is in the closed position, the air vent valve core 60 blocks the air vent 14. The emergency valve core 20 can drive the air vent valve core 60 to move between the open position and the closed position. When the emergency valve is inflated, since the emergency valve core 20 moves upward, the air vent 14 can be blocked by the air vent valve core 60. At this time, the pressurized air fills the emergency lower chamber 12 and enters the emergency upper chamber 11 through the emergency valve core 20. When the emergency valve is exhausted, the train pipe pressure decreases rapidly, and the driving pressure difference drives the emergency valve core 20 to move downward. The emergency valve core 20 can drive the vent valve core 60 to move to the open position, so that the pressurized air in the emergency lower chamber 12 is discharged from the valve body 10 through the vent port 14 and the exhaust port 15.

[0047] Another embodiment of the utility model provides an air control valve, which includes the emergency valve provided above. With the above air control valve, when the emergency valve is inflated, the train pipe enters the emergency lower chamber 12 through the air inlet 13 of the valve body 10, and enters the emergency upper chamber 11 through the inner hole 23 of the emergency valve core 20. Since the dust filter sleeve 30 is arranged in the inner hole 23, the outer wall of the dust filter cylinder 31 fits with the hole wall of the inner hole 23, and the dust filter plate 32 and the dust filter cylinder 31 can filter the pressure air entering the inner hole 23. When the emergency valve is exhausted, the pressure of the train pipe decreases rapidly, and the pressure air in the emergency upper chamber 11 enters the emergency lower chamber 12 through the inner hole 23, and is discharged from the valve body 10 through the exhaust port 15. The dust filter plate 32 and the dust filter cylinder 31 can filter the pressure air entering the inner hole 23. Therefore, when inflating and exhausting, the dust filter sleeve 30 can be used to filter the pressure air, so that the inner hole 23 will not be blocked.

[0048] In this embodiment, the train braking system further includes an emergency chamber, which is connected to the emergency upper chamber 11 to store pressurized air filled in the emergency upper chamber 11. Since the emergency chamber and the emergency valve are both made by casting, there is a problem that the inner hole 23 is blocked when the train brakes and the train pipe is exhausted due to incomplete sand cleaning or other foreign matter.

[0049] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0050] Unless otherwise specifically stated, the relative arrangement, numerical expressions and numerical values ​​of the parts and steps set forth in these embodiments do not limit the scope of the utility model. At the same time, it should be understood that, for ease of description, the sizes of the various parts shown in the accompanying drawings are not drawn according to the actual proportional relationship. The technology, method and equipment known to those of ordinary skill in the relevant art may not be discussed in detail, but in appropriate cases, the technology, method and equipment should be considered as a part of the specification. In all examples shown and discussed here, any specific value should be interpreted as being merely exemplary, rather than as a limitation. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters represent similar items in the following drawings, and therefore, once a certain item is defined in an accompanying drawing, it does not need to be further discussed in subsequent drawings.

[0051] In the description of the present utility model, it needs to be understood that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the drawings, and are only for the convenience of describing the present utility model and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction, and therefore cannot be understood as limiting the scope of protection of the present utility model; the directional words "inside and outside" refer to the inside and outside relative to the contours of each component itself.

[0052] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0053] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. If not otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of the utility model.

[0054] The above description is only the preferred embodiment of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. An emergency valve, characterized in that: The emergency valve comprises: A valve body (10) having an air inlet (13) and an air outlet (15); an emergency valve core (20) movably disposed in the valve body (10), the emergency valve core (20) dividing the inner cavity of the valve body (10) into an emergency upper cavity (11) and an emergency lower cavity (12), the air inlet (13) and the air outlet (15) both being disposed in the emergency lower cavity (12), and the emergency valve core (20) having an inner hole (23) communicating with the emergency upper cavity (11) and the emergency lower cavity (12); The dust filter sleeve (30) comprises a dust filter cylinder (31) and a dust filter plate (32); the dust filter cylinder (31) is inserted into the inner hole (23); the outer wall of the dust filter cylinder (31) is in contact with the hole wall of the inner hole (23); the dust filter plate (32) is arranged in the dust filter cylinder (31); the outer edge of the dust filter plate (32) is connected to the inner wall of the dust filter cylinder (31).

2. The emergency valve according to claim 1, characterized in that: Both sides of the dust filter plate (32) do not protrude from the dust filter cylinder (31).

3. The emergency valve according to claim 1, characterized in that: The ratio between the thickness of the dust filter plate (32) and the thickness of the wall of the dust filter cylinder (31) is between 0.8 and 1.

2.

4. The emergency valve according to claim 1, characterized in that: The ratio between the diameter of the dust filter plate (32) and the outer diameter of the dust filter cylinder (31) is between 0.6 and 0.

8.

5. The emergency valve according to claim 1, characterized in that: The dust filter sleeve (30) is made of alloy powder.

6. The emergency valve according to claim 1, characterized in that: The dust filter cylinder (31) and the dust filter plate (32) are integrally formed.

7. The emergency valve according to claim 1, characterized in that: The dust filter sleeve (30) is a centrally symmetrical structure.

8. The emergency valve according to claim 1, characterized in that: The emergency valve core (20) is provided with a mounting groove, the groove wall of the mounting groove forms part of the hole wall of the inner hole (23), the emergency valve also includes a pressing ring (40), the dust filter sleeve (30) is located in the mounting groove, the pressing ring (40) is pressed above the dust filter sleeve (30) and is connected to the emergency valve core (20).

9. The emergency valve according to claim 1, characterized in that: The emergency valve further comprises a spring (50) located in the emergency lower chamber (12), the two ends of the spring (50) respectively abutting against the inner wall of the valve body (10) and the emergency valve core (20), the spring (50) can provide a reset force for the emergency valve core (20), so that the inlet of the inner hole (23) is connected with the emergency lower chamber (12), the side wall of the emergency valve core (20) has an air intake groove, one end of the air intake groove is connected with the emergency upper chamber (11), and the other end of the air intake groove is connected with the inner hole (23) through the dust filter sleeve (30); and / or, The emergency valve core (20) comprises a valve stem (21) and a diaphragm (22), wherein the valve stem (21) extends vertically and is movably arranged, and the diaphragm (22) extends horizontally, the inner edge of the diaphragm (22) is connected to the valve stem (21), and the outer edge of the diaphragm (22) is connected to the valve body (10), so as to separate the inner cavity of the valve body (10) into the emergency upper cavity (11) and the emergency lower cavity (12); The valve body (10) has an air vent (14), the air inlet (13) and the air outlet (15) are both arranged on the side wall of the valve body (10), and the air vent (14) is arranged inside the valve body (10). The emergency valve also includes an air vent valve core (60) located below the emergency valve core (20), and the air vent valve core (60) is movably arranged in the valve body (10). The air vent valve core (60) has an open position and a closed position. When the air vent valve core (60) is located at the open position, the air vent valve core (60) opens the air vent (14) to allow the air inlet (13) and the air outlet (15) to communicate. When the air vent valve core (60) is located at the closed position, the air vent valve core (60) blocks the air vent (14), and the emergency valve core (20) can drive the air vent valve core (60) to move between the open position and the closed position.

10. An air control valve, characterized in that: The air control valve comprises the emergency valve according to any one of claims 1 to 9.

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