An aerostat exhaust valve with a sealed waterline trough and a fin-type sealing ring

Abstract

The present invention relates to the field of sealing, and specifically to an aerostat exhaust valve that incorporates a sealed waterline trough and a fin-type sealing ring. The valve comprises a valve body and a bladder housing disposed outside the valve body. The bladder and valve body enclose a sealed cavity, and the contact surfaces between the bladder and valve body are compressed and sealed by a bladder seal. The valve body is provided with an exhaust hole for discharging gas from the sealed cavity. A valve flap is coaxially arranged outside the exhaust hole and is driven by a linear drive unit to move in a direction perpendicular to the valve body plate surface. When the valve flap abuts the valve body, the exhaust hole is sealed by an exhaust port seal. The present invention can achieve uniform distribution of the compressive force on the exhaust valve flap, and provides excellent overall sealing performance.

Description

Technical Field

[0001] The invention relates to the field of sealing, in particular to an aerostat exhaust valve in which a sealed waterline groove is matched with a fin-type sealing ring. Background Art

[0002] An aerostat generally refers to an aircraft that is lighter than air and relies on atmospheric buoyancy for lift. The aerostat is filled with gases such as helium or hydrogen, allowing it to float. The gas is then discharged through an exhaust valve to control the lift. The structure of the current aerostat exhaust valve, as described in patent number "CN103438267A," consists of a main subsystem corresponding to the inner valve flap, a transmission mechanism, and a valve base. The transmission mechanism is mounted on the valve base via its transmission mechanism bracket, and the inner valve flap is connected to the transmission mechanism. A motor is installed on one side of the valve body, and the valve is opened and closed by a worm gear transmission mechanism. This flip-top opening and closing method creates an uneven pressure when the valve is closed and sealed. The end farther from the motor experiences less pressure than the end closer, making it difficult to meet sealing requirements. Furthermore, protrusions such as dust particles on the sealing surface can cause the valve to fail to close, thus urgently requiring a solution. Summary of the Invention

[0003] To avoid and overcome the technical problems existing in the prior art, the present invention provides an aerostat exhaust valve that combines a sealed waterline trough with a fin-type sealing ring. The present invention can achieve uniform distribution of the compression force on the exhaust valve disc and has good overall sealing performance.

[0004] To achieve the above object, the present invention provides the following technical solutions:

[0005] A kind of airship exhaust valve that cooperates with a sealed waterline groove and a fin-type sealing ring, comprises a valve body and a sac body covered outside the valve body, the sac body and the valve body enclose a sealed cavity, and the contact surface between the sac body and the valve body is compressed and sealed by a sac body seal; an exhaust hole is opened on the valve body for the gas in the sealed cavity to be discharged outward, the valve disc is coaxially arranged outside the exhaust hole, and is driven by a linear drive unit to move in a direction perpendicular to the valve body plate surface, and the exhaust hole is sealed by the exhaust port seal when the valve disc abuts the valve body.

[0006] As a further solution of the present invention: the exhaust port seal includes a sealing seat fixed on the valve body and located outside the sealing cavity, and the sealing seat is provided with a valve seat U-shaped groove surrounding the exhaust hole and coaxially arranged with the exhaust hole; a clamping ring is provided on the valve disc and coaxially arranged with the valve seat U-shaped groove, and the inner ring and / or outer ring of the clamping ring are provided with a fin-type sealing ring, and the width of the fin-type sealing ring is greater than the distance between the clamping ring and the groove wall on either side of the valve seat U-shaped groove.

[0007] As a further solution of the present invention: a flat sealing gasket is installed in the U-shaped groove of the valve seat of the sealing seat, and a second waterline groove is opened on the bottom surface of the U-shaped groove of the valve seat. After the clamping ring of the valve disc is driven by the linear drive unit to be inserted into the U-shaped groove of the valve seat of the sealing seat, the clamping ring abuts against the flat sealing gasket and deforms the flat sealing gasket to fully contact the second waterline groove.

[0008] As a further solution of the present invention: a sealing step is provided on the U-shaped groove wall of the valve seat of the sealing seat, and the number of fin-type sealing rings on the valve disc corresponds to the number of step surfaces of the sealing step, so that each fin-type sealing ring is compressed and deformed on the corresponding step surface, and the interference fit between each fin-type sealing ring and the U-shaped groove wall of the valve seat is not equal.

[0009] As a further solution of the present invention: the linear drive unit includes a push rod motor installed on the valve body through a mounting bracket, and the push rod of the push rod motor coaxially passes through the exhaust hole and is fixed to the valve disc.

[0010] As a further solution of the present invention: a tension spring is mounted on the mounting bracket and is evenly arranged around the push rod. The end of the tension spring away from the mounting bracket is connected and fixed to the valve disc.

[0011] As a further solution of the present invention: an annular pressure plate is arranged on one side of the valve body outside the sealing cavity, and the outer ring of the bladder is pressed and fixed to the valve body by the pressure plate; mounting grooves for positioning the sealing gasket are provided on the mating surfaces of the pressure plate and the valve body, and an upper sealing gasket and a lower sealing gasket are installed in the mounting grooves of the pressure plate and the valve body respectively, and the press-fitting bolts pass through the valve body, upper sealing gasket, bladder, lower sealing gasket and pressure plate in sequence, and then the valve body and the pressure plate bolts are fixed.

[0012] As a further solution of the present invention: a first waterline groove is opened on the bottom surface of the pressure plate and the installation groove of the valve body, and the upper sealing gasket and the lower sealing gasket are fully in contact with the corresponding first waterline groove after being compressed.

[0013] Compared with the prior art, the present invention has the following beneficial effects:

[0014] 1. The present invention installs a linear drive unit in the sealing chamber of the aerostat, and drives the valve disc to move axially through the linear drive unit, thereby achieving uniform distribution of the valve disc pressing force. Since the linear drive unit is built into the sealing chamber, it is not easily affected by external dust particles, etc., and the overall sealing performance is good, which solves the problem of valve disc leakage caused by insufficient pressing force due to motor failure or other factors.

[0015] 2. The present invention installs a sealing seat with a valve seat U-shaped groove at the bottom of the valve body. When the linear drive unit drives the valve disc to rise and fall axially, the fin-type sealing ring on the outer ring of the valve disc clamping ring and the groove wall of the U-shaped groove of the sealing seat are interference fit and deformed, thereby forming a seal; at the same time, the flat sealing gasket on the bottom surface of the valve seat U-shaped groove is deformed after being squeezed by the clamping ring, and the flat sealing gasket is pressed into the second waterline groove after being squeezed, and is fully in contact with the second waterline groove to achieve sealing; the setting of the sealing step in the valve seat U-shaped groove can simultaneously form a seal with multiple fin-type sealing rings of different sizes, and the superposition of multiple layers of seals further improves the sealing performance.

[0016] 3. The present invention installs an annular pressure plate at the bottom of the valve body, and provides installation grooves on the corresponding surfaces of the pressure plate and the valve body to serve as limits for the upper and lower sealing gaskets. When the bladder body is compressed by the press-fit bolts, the upper and lower sealing gaskets are deformed, and the sealing gaskets are pressed into the first waterline groove and fully contact the first waterline groove to achieve an annular seal on the bolts.

[0017] 4. The present invention utilizes a push rod motor to drive the valve cover in axial linear motion. The provision of a tension spring uniformly applies tension to the fulcrums around the valve cover, compressing the valve cover against the sealing gasket. The overall sealing structure is lightweight and requires no additional structure, achieving a reliable, modular seal even with low motor power. Reliable sealing can be achieved even in the event of insufficient motor torque due to motor failure or unstable voltage. Due to the wide temperature range of aerostat valves, the guide clearance during valve flap movement is large. Consequently, the valve flap and sealing gasket cannot accurately achieve the same indentation repeatedly during multiple opening and closing operations. The design of a fin-shaped sealing ring allows for automatic centering of the valve flap and valve support, ensuring concentricity between the valve flap and the sealing ring, avoiding pressure deviation and further improving sealing performance. Aviation valves generally require vibration resistance during transportation. Conventional non-composite carbon fiber materials (non-metallic) are manufactured using a layered process, resulting in poor vibration resistance. Fin-shaped sealing rings made of composite carbon fiber materials can form a buffer between the valve cover and the U-shaped groove, achieving a vibration reduction effect. Compared to fin-type seals, the stepped design allows for flexible control of the interference fit between the two sealing fins and the U-shaped groove wall of the valve seat, achieving different sealing preloads for each section. This allows for more precise control of sealing pressure and motion resistance, achieving a balance between reduced motor torque and lightweight design while maintaining excellent sealing performance. Furthermore, when the gas passes through the right angle of the stepped design, the change in airflow direction creates a certain pressure drop, thereby reducing the sealing pressure required in the second (largest) section. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural schematic diagram of the present invention.

[0019] Figure 2 It is a structural schematic diagram of the capsule sealing member in the present invention.

[0020] Figure 3 Schematic diagram of the structure of the first embodiment of the exhaust port seal in the present invention.

[0021] Figure 4 Schematic diagram of the structure of the second embodiment of the exhaust port seal in the present invention.

[0022] Figure 5 Schematic diagram of the structure of the third embodiment of the exhaust port seal in the present invention.

[0023] Figure 6 Schematic diagram of the structure of the fourth embodiment of the exhaust port seal in the present invention.

[0024] In the picture:

[0025] 1. Valve body; 11. Push rod motor; 12. Mounting bracket;

[0026] 13. Extension spring; 14. Exhaust hole; 15. Push rod;

[0027] 2. capsule; 21. sealed cavity;

[0028] 3. Valve disc; 31. Clamping ring; 32. Fin-type sealing ring;

[0029] 4. Capsule seal; 41. Press plate; 42. Upper sealing gasket; 43. Lower sealing gasket;

[0030] 44. Press-fit bolt; 45. First waterline trough;

[0031] 5. Exhaust port seal; 51. Sealing seat; 511. Sealing step;

[0032] 52. Second waterline trough; 53. Flat sealing gasket. DETAILED DESCRIPTION

[0033] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0034] See also Figures 1 to 6 In an embodiment of the present invention, an aerostat exhaust valve that cooperates with a sealed waterline groove and a fin-type sealing ring includes a valve body 1 and a bladder 2 with an opening. The bladder 2 is arranged outside the valve body 1, and the open end of the bladder 2 is pressed against the edge of the valve body 1, so that the bladder 2 and the valve body 1 enclose a sealed cavity 21.

[0035] A bladder seal 4 is installed at the bottom of the valve body 1 to compress the bladder 2. This seal 4 comprises an annular pressure plate 41. The surfaces of the pressure plate 41 facing the valve body 1 each feature annular mounting grooves for mounting an upper gasket 42 and a lower gasket 43, respectively. A press-fit bolt 44 passes through the valve body 1, upper gasket 42, bladder 2, lower gasket 42, and pressure plate 41, securing the components together and compressing the bladder 2. The nut of the press-fit bolt 44 is located within the sealing cavity 21, with a gasket installed between the nut and the valve body 1.

[0036] A V-shaped first waterline groove 45 is preferably opened in the mounting groove of the pressure plate 41 and the valve body 1. When the upper sealing gasket 42 and the lower sealing gasket 43 are pressed, the sealing gasket is deformed by the force and pressed into the first waterline groove 45, thereby realizing an annular seal for the bolt. Replacing the first waterline groove 45 with an annular raised cutting edge structure can achieve the same sealing effect.

[0037] A vent hole 14 is located at the center of the valve body 1. An exhaust port seal 5 is located on the outer ring of the vent hole 14 at the bottom of the valve body 1 to seal the vent hole 14. The vent hole seal 5 includes an annular sealing seat 51 coaxially arranged with the vent hole 14. The bottom of the sealing seat 51 has a valve seat U-shaped groove coaxially arranged with the vent hole, with the opening of the valve seat U-shaped groove facing downward. The valve disc 3 is coaxially arranged with the sealing seat 51. The outer ring of the valve disc 3 is provided with a clamping ring 31 for insertion into the valve seat U-shaped groove of the sealing seat 51. There is a gap between the inner and outer rings of the clamping ring 31 and the inner and outer groove walls of the valve seat U-shaped groove. The outer ring of the clamping ring 31 is provided with a fin-shaped sealing ring 32. The fin-shaped sealing ring 32 is elastic and its width is greater than the gap between the outer ring of the clamping ring 31 and the outer groove wall of the valve seat U-shaped groove. In the first embodiment, when the compression ring 31 moves axially with the valve disc 3, the fin-shaped sealing ring 32 on the compression ring 31 enters the U-shaped groove of the valve seat and deforms, thereby fully contacting the groove wall of the valve seat U-shaped groove to achieve sealing of the exhaust hole 14. During exhaust, the compression ring 31 withdraws from the sealing seat 51, thereby releasing the seal of the exhaust hole 14.

[0038] In order to improve the sealing effect, in the second embodiment of the exhaust port seal 5, multiple groups of sealing steps 511 can be opened axially in the valve seat U-shaped groove of the sealing seat 51, and the inner diameter of the sealing step 511 gradually increases in the direction away from the exhaust hole 14. Fin-type sealing rings 32 corresponding to the number of sealing steps 511 are axially arranged on the clamping ring 31, and the width of each fin-type sealing ring 32 corresponds to the inner diameter of each sealing step 511, so that it can be compressed and deformed on the corresponding step surface to achieve multi-pass sealing. A flat sealing gasket 53 is provided on the bottom surface of the valve seat U-shaped groove of the sealing seat 51, and a V-shaped second waterline groove 52 is opened on the bottom surface of the valve seat U-shaped groove. After the clamping ring 31 enters the valve seat U-shaped groove of the sealing seat 51, the flat sealing gasket 53 is deformed by force and pressed into the second waterline groove 52, thereby achieving an annular seal. Replacing the second waterline groove 52 with an annular raised structure can achieve the same sealing effect. On the basis of the first embodiment, as Figure 5 and Figure 6 As shown, the fin-type sealing ring 32 can also be arranged on the inner wall or outer wall of the U-shaped groove of the sealing seat 51 valve seat, which can achieve the same sealing effect.

[0039] The second waterline grooves 52 are preferably provided in two groups, and the two groups of waterline grooves are respectively located on the inner side and the outer side of the clamping ring 31 along the vertical direction.

[0040] A mounting bracket 12 is provided on the valve body 1's plate, located on one side of the sealed chamber 21. Mounting bracket 12 is used to mount a push rod motor 11. A push rod 15 of push rod motor 11 is coaxially fixed to the valve disc 3, driving the valve disc 3 in axial linear displacement. Tension springs 13 are evenly arranged along the circumference of the outer ring of push rod 15. One end of the tension spring 13 is fixed to mounting bracket 12, and the other end is connected and fixed to the valve disc 3.

[0041] The sealing cavity 21 is preferably filled with helium. The connection between the bladder 2 and the valve body 1, and the connection between the valve body 1 and the valve flap 3, all adopt the deformation of the sealing material plus the redundant sealing of the valve flap, which greatly reduces the leakage rate and increases the hovering time of the aerostat. At the same time, no unnecessary sealing components are added to ensure that the valve weight is light enough.

[0042] The basic principles of the present application have been described above in conjunction with specific embodiments. However, it should be noted that the advantages, strengths, and effects mentioned in this application are merely illustrative and not restrictive, and it should not be assumed that these advantages, strengths, and effects are required of each embodiment of this application. In addition, the specific details disclosed above are merely illustrative and facilitating understanding, and are not restrictive. The above details do not limit this application to necessarily being implemented using the above specific details.

[0043] The block diagrams of the devices, devices, equipment, and systems involved in this application are merely illustrative examples and are not intended to require or imply that they must be connected, arranged, or configured in the manner shown in the block diagrams. As will be appreciated by those skilled in the art, these devices, devices, equipment, and systems can be connected, arranged, or configured in any manner. Words such as "include," "comprise," "have," and the like are open-ended words, meaning "including but not limited to," and can be used interchangeably therewith. The words "or" and "and" used herein refer to the words "and / or" and can be used interchangeably therewith, unless the context clearly indicates otherwise. The word "such as" used herein refers to the phrase "such as but not limited to," and can be used interchangeably therewith.

Claims

1. An aerostat exhaust valve with a sealed waterline trough and a fin-type sealing ring, characterized in that: The valve body (1) comprises a valve body (1) and a sac (2) which is arranged outside the valve body (1), the sac (2) and the valve body (1) enclose a sealing cavity (21), and the contact surface between the sac (2) and the valve body (1) is compressed and sealed by a sac sealing member (4); an exhaust hole (14) is provided on the valve body (1) for exhausting gas in the sealing cavity (21) to the outside, a valve flap (3) is coaxially arranged outside the exhaust hole (14), and is driven by a linear drive unit to move in a direction perpendicular to the plate surface of the valve body (1); when the valve flap (3) contacts the valve body (1), the exhaust hole (14) is sealed by the exhaust port sealing member (5); The exhaust port seal (5) includes a sealing seat (51) fixed on the valve body (1) and located outside the sealing cavity (21), and a valve seat U-shaped groove surrounding the exhaust hole (14) and coaxially arranged with the exhaust hole (14) is provided on the sealing seat (51); a clamping ring (31) coaxially arranged with the valve seat U-shaped groove is provided on the valve disc (3), and a fin-type sealing ring (32) is provided on the inner ring and / or the outer ring of the clamping ring (31), and the width of the fin-type sealing ring (32) is greater than the distance between the clamping ring (31) and the groove wall on either side of the valve seat U-shaped groove.

2. The aerostat exhaust valve with a sealed waterline trough and a fin-type sealing ring according to claim 1, characterized in that: A flat sealing gasket (53) is installed in the valve seat U-shaped groove of the sealing seat (51), and a second waterline groove (52) is provided on the bottom surface of the valve seat U-shaped groove. After the clamping ring (31) of the valve disc (3) is driven by the linear drive unit to be inserted into the valve seat U-shaped groove of the sealing seat (51), the clamping ring (31) abuts against the flat sealing gasket (53) and deforms the flat sealing gasket (53) to fully contact the second waterline groove (52).

3. The aerostat exhaust valve with a sealed waterline trough and a fin-type sealing ring according to claim 1, characterized in that: A sealing step (511) is provided on the U-shaped groove wall of the valve seat of the sealing seat (51), and the number of the fin-shaped sealing rings (32) on the valve disc (3) corresponds to the number of step surfaces of the sealing step (511), so that each fin-shaped sealing ring (32) is compressed and deformed on the corresponding step surface, and the interference between each fin-shaped sealing ring (32) and the U-shaped groove wall of the valve seat is unequal.

4. An aerostat exhaust valve with a sealed waterline trough and a fin-type sealing ring according to any one of claims 1 to 3, characterized in that: The linear drive unit comprises a push rod motor (11) mounted on the valve body (1) via a mounting bracket (12), wherein a push rod (15) of the push rod motor (11) coaxially passes through the exhaust hole (14) and is fixed to the valve disc (3).

5. The aerostat exhaust valve with a sealed waterline trough and a fin-type sealing ring according to claim 4, characterized in that: A tension spring (13) is mounted on the mounting bracket (12) and is evenly arranged around the push rod (15). The end of the tension spring (13) away from the mounting bracket (12) is connected and fixed to the valve disc (3).

6. An aerostat exhaust valve with a sealed waterline trough and a fin-type sealing ring according to any one of claims 1 to 3, characterized in that: An annular pressure plate (41) is arranged on one side of the valve body (1) outside the sealing cavity (21), and the outer ring of the capsule (2) is pressed and fixed on the valve body (1) by the pressure plate (41); mounting grooves for positioning the sealing gasket are provided on the mating surfaces of the pressure plate (41) and the valve body (1), and an upper sealing gasket (42) and a lower sealing gasket (43) are respectively installed in the mounting grooves of the pressure plate (41) and the valve body (1). After the pressing bolts (44) pass through the valve body (1), the upper sealing gasket (42), the capsule (2), the lower sealing gasket (43) and the pressure plate (41) in sequence, the valve body (1) and the pressure plate (41) are fixed with bolts.

7. The aerostat exhaust valve with a sealed waterline trough and a fin-type sealing ring according to claim 6, characterized in that: The bottom surfaces of the mounting grooves of the pressure plate (41) and the valve body (1) are both provided with first waterline grooves (45), and the upper sealing gasket (42) and the lower sealing gasket (43) are fully in contact with the corresponding first waterline grooves (45) after being pressed.

Images