CN214330757U - Boats and ships air inlet filter - Google Patents

Abstract

The utility model relates to a boats and ships equipment field especially relates to a boats and ships air inlet filter. The method comprises the following steps: the air inlet frame is of a hollow structure with the middle part serving as an air inlet channel, a filtering installation frame is arranged on the air inlet side, and a sealing installation frame is arranged on the air outlet side; the filtering grille is arranged on the filtering installation frame and is used for filtering impurities in the air inlet flow; the sealing door plate is pivoted to the sealing installation frame in an openable and closable manner so as to conduct or block the air inlet channel. The utility model provides a boats and ships air inlet filter, the frame design with current filter is independent filtration installation frame and sealed installation frame to be used for installing respectively and filtering grid and sealed door plant, like this, can only just can realize through the sealed door plant that opens and shuts alone when control is opened and shut, effectively reduced pivoted part and born a burden, warp in order to reduce the appearance that the ship wall opening appears, admit air the appearance of leakage scheduling problem, the effectual holistic security and the stability of boats and ships that have improved.

Description

Boats and ships air inlet filter

Technical Field

The utility model relates to a boats and ships equipment field especially relates to a boats and ships air inlet filter.

Background

The ship is an artificial transportation tool which mainly operates in environments such as rivers, lakes, seas and the like. The existing ship structure mainly comprises a ship body, a ship electrical system, a ship power device and the like. Among them, the hull is an essential part of the ship, and the hull is generally used for arranging electric and power systems, loading cargo, storing fuel and fresh water, and arranging other various compartments; the ship electrical system comprises main and auxiliary machines and other electrical equipment on the ship; marine power systems are composed of more parts, such as gas turbine based propulsion units, auxiliary machinery and systems (e.g., inlet and outlet air ducts, etc.) that serve the operation of the propulsion units, marine power stations, etc. The ship power system is used as a part for providing power for the operation of the ship, and the operation state of the ship power system directly influences the normality of the ship.

Due to the special working environment of the ship, different external environmental factors can form the normal operation of the ship power system, for example, salt fog aerosol is filled in the marine environment where the ship runs, and after being sucked by the gas turbine of the ship, the salt fog aerosol can corrode parts such as a gas compressor, a combustion chamber, a turbine and the like of the gas turbine, so that the working efficiency of the gas turbine is reduced, and even major accidents are caused. It is therefore necessary to filter the intake air stream using an intake air filter arrangement.

Fig. 1 shows an intake air filtering device in the prior art, which adopts a structural design that most structures such as a filter grid and a door panel are integrated to jointly rotate a switch, and when the filter grid and the door panel are opened and closed, more components rotate, and the whole weight is larger.

SUMMERY OF THE UTILITY MODEL

The embodiment of the utility model provides a boats and ships air inlet filter to the conventional structural design of the filter that admits air of boats and ships among the solution prior art leads to the ship wall to warp, admit air and leak the scheduling problem.

In a first aspect, a ship intake air filtering device is provided, which comprises:

the air inlet frame is of a hollow structure with the middle part serving as an air inlet channel, a filtering installation frame is arranged on the air inlet side, and a sealing installation frame is arranged on the air outlet side;

the filtering grille is arranged on the filtering installation frame and is used for filtering impurities in the air inlet flow;

the sealing door plate is pivoted to the sealing installation frame in an openable and closable manner so as to conduct or block the air inlet channel;

and one end of the first locking device is fixedly connected with the sealing door plate, and the other end of the first locking device is detachably connected with the sealing installation frame.

In some alternative embodiments, the air intake frame is a rectangular tubular structure;

the filter grid is embedded in the filter mounting frame.

In some optional embodiments, the ship intake air filtering device further comprises a driving mechanism, and the driving mechanism is used for controllably driving the sealing door panel to open and close.

In some alternative embodiments, the drive mechanism comprises:

the first telescopic end of the pneumatic telescopic rod is pivoted to the sealing door plate, and the second telescopic end of the pneumatic telescopic rod is arranged on the sealing installation frame;

and the pneumatic switch is electrically connected with the control circuit of the pneumatic telescopic rod and used for controlling the starting and stopping of the pneumatic telescopic rod.

In some optional embodiments, the marine intake air filtering device further comprises:

first locking device is including emergent latch segment and reserve screw, emergent latch segment is angle bar form book shape structure, the first side subsides of emergent latch segment are established and are fixed in on the sealing door board, and first screw hole has been seted up to the tip on the second side, and reserve screw is rotatable to be set up in this threaded hole.

In some optional embodiments, the lock further comprises a second locking device, wherein the second locking device comprises a lock housing, a hand wheel, a stop member and a gear reversing assembly, the gear reversing assembly is arranged in the lock housing, and the gear reversing assembly comprises an input gear shaft and an output gear shaft which are arranged perpendicularly to each other and are in meshing fit with each other; the non-meshing end of the input gear shaft extends out of the lock shell and is in driving connection with the hand wheel; the non-meshing end of the output gear shaft extends out of the lock shell and is in driving connection with the stop piece; the hand wheel is rotated to drive the stop piece to rotate to a locking position and to be far away from the locking position.

In some optional embodiments, the ship intake air filtering device further comprises an anti-icing device arranged on the sealing door panel and used for heating and melting frost condensed on the sealing door panel.

In some alternative embodiments, the anti-icing assembly comprises:

the electric heating gasket is attached to the sealing door plate;

and the power supply circuit is electrically connected with the ship power supply of the ship in a switching mode.

In some alternative embodiments, an electrically heated gasket is provided at a peripheral location between the seal door panel and the seal mounting frame.

In a second aspect, a vessel is also provided, the vessel having the vessel intake air filtering device of any one of the above embodiments.

The utility model provides a boats and ships air inlet filter, the frame design with current filter is independent filtration installation frame and sealed installation frame to be used for installing respectively and filtering grid and sealed door plant, like this, can only just can realize through the sealed door plant that opens and shuts alone when control is opened and shut, effectively reduced pivoted part and born a burden, warp in order to reduce the appearance that the ship wall opening appears, admit air the appearance of leakage scheduling problem, the effectual holistic security and the stability of boats and ships that have improved.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required to be used in the description of the embodiments of the present invention will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without inventive labor.

FIG. 1 is a schematic illustration of an intake air filter arrangement of the prior art;

FIG. 2 is an exploded view of the intake air filter assembly of the ship in accordance with the embodiment of the present invention;

FIG. 3 is a perspective view of the intake air filter assembly of the ship in accordance with the embodiment of the present invention;

FIG. 4 is a schematic front view of a marine intake air filter assembly according to an embodiment of the present invention;

FIG. 5 is a schematic view of the back side of the intake air filter assembly of the present invention;

FIG. 6 is a schematic view illustrating an opened state of a sealing door panel of the intake air filtering device for a ship according to the embodiment of the present invention;

fig. 7 is a first external schematic view of a second locking device according to an exemplary embodiment of the present invention;

fig. 8 is a second external schematic view of a second locking device of the present invention according to an exemplary embodiment;

fig. 9 is a schematic view of the internal structure of a second locking device according to an exemplary embodiment of the present invention.

Wherein, 1, an air inlet frame; 11. a filtering and mounting frame; 12. a sealing and mounting frame; 2. filtering the grating; 3. a sealing door panel; 41. a pneumatic telescopic rod; 42. a pneumatic switch; 5. a second locking device; 51. a lock housing; 511. an upper annular clamping groove; 512. a lower annular slot; 52. a hand wheel; 53. an input gear shaft; 531. a worm section; 54. an output gear shaft; 541. a turbine section; 55. a stopper; 551. A shaft connection end; 552. a stop end; 56. a screw; 57. a screw head groove; 61. electrically heating the gasket; 62. A power supply circuit; 7. a first locking device.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, not all, of the embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Fig. 2 is the utility model discloses the explosion picture of boats and ships air inlet filter, fig. 3 is the utility model discloses a boats and ships air inlet filter's stereogram, fig. 4 is the utility model discloses a boats and ships air inlet filter's front schematic diagram, fig. 5 is the utility model discloses a boats and ships air inlet filter's back schematic diagram, fig. 6 is the state schematic diagram when airtight door plant of boats and ships air inlet filter is opened.

As shown in fig. 1 to 6, the utility model provides a boats and ships air inlet filter, boats and ships filter can be used to filter the air current before getting into gas turbine to avoid impurity to get into gas turbine and cause the loss to gas turbine's performance. The ship filtering device mainly comprises an air inlet frame 1, a filtering grille 2, a sealing door plate 3, a first locking device 7 and other components, wherein the filtering grille 2 is mainly used for filtering impurities in air inlet flow, and the sealing door plate 3 is mainly used for conducting or blocking an air inlet channel inside the air inlet frame 1. One end of the first locking device 7 is fixedly connected with the sealing door plate, and the other end of the first locking device is detachably connected with the sealing installation frame.

Particularly, air inlet frame 1 is the hollow structure that the middle part was as inlet air channel, and in the embodiment, air inlet frame 1 is the rectangle tube-shape structure, and tube-shape structure's middle part is inlet air channel promptly, and here, air inlet frame 1 sets up in the inlet air channel of boats and ships, can be one of them section wind channel as inlet air channel, and like this, the air current that flows through inlet air channel can flow through this inlet air frame 1's inlet air channel to guarantee that the air current that flows through inlet air channel can be filtered by boats and ships air inlet filter.

In the embodiment, the air inlet side of air inlet frame 1 is equipped with filters installation frame 11, wherein, filters installation frame 11 and is used for installing filtering grid 2, in the embodiment, filters installation frame 11 and is the tubular structure of following the air inlet side to go out the inboard indent, can make filtering grid 2 install in filtering installation frame 11 with embedded cooperation mode like this, the mode of inlaying and establishing can improve filtering grid 2 and filter the steadiness of being connected between the installation frame 11, and can provide support to filtering grid 2 in the air inlet flow direction through the indent structural style, avoid filtering grid 2 to appear skew, dislocation scheduling problem under strong air inlet flow's atmospheric pressure effect.

In the embodiment, the air outlet side of the air inlet frame 1 is provided with a sealing installation frame 12, and the sealing door panel 3 is pivotally connected to the sealing installation frame 12 in an openable manner so as to conduct or block the air inlet channel. In the figure, the sealing door panel 3 is in an upturning type rotating form, the upper edge of the sealing installation frame 12 is provided with a rotating shaft seat, and the edge of the sealing door panel 3, which corresponds to the upper edge of the sealing installation frame 12, is provided with a rotating shaft, so that the sealing door panel 3 is opened and closed relative to the sealing installation frame 12 through the rotating fit of the rotating shaft and the rotating shaft seat.

Optionally, the filtering and mounting frame 11 and the sealing and mounting frame 12 are integrated, so that the filtering and mounting frame is convenient to machine and form, is suitable for mass production of products, and reduces the complexity of the production process.

In some optional embodiments, the intake air filtering device further comprises a driving mechanism for controllably driving the sealing door panel 3 to open and close. Thus, the driving mechanism can control the opening and closing of the sealing door panel 3 in an electric control mode.

In some optional embodiments, the ship intake air filter device is arranged on a main flow path of an intake air duct of a ship, and/or is arranged on a branch flow path of the intake air duct. The main flow path and the branch flow path are both communicated with the gas turbine and can convey air to the gas turbine, and in a normal use state of the ship, the ship only starts the main flow path of the air intake duct to convey air to the gas turbine, while the branch flow path is used as a standby flow path and can convey air to the gas turbine as a temporary flow path of the intake air flow in an emergency state that the main flow path has a blockage problem and the like.

Optionally, the ship intake air filter device arranged in the branch flow path further comprises a pressure difference detection device, and the pressure difference detection device is used for measuring the pressure difference between the intake side and the exhaust side of the ship intake air filter device. When the pressure difference between the air inlet side and the air outlet side of the ship air inlet filtering device exceeds a set pressure difference early warning value, the problem that the main flow path of the air inlet channel is blocked can be judged, and the driving mechanism can be controlled to drive the sealing door plate 3 to be opened at the moment, so that the inlet air flow can flow to the gas turbine along the branch flow path, and the damage of the main flow path blocking to the gas turbine is reduced.

In the embodiment, under the condition that the main flow path of the air inlet duct normally conveys air flow, the sealing door panel 3 of the ship air inlet filter device arranged on the main flow path is kept in an open state, and the sealing door panel 3 of the ship air inlet filter device arranged on the branch flow path is kept in a closed state.

In some alternative embodiments, the driving mechanism is mainly composed of the pneumatic telescopic rod 41 and the pneumatic switch 42.

Here, the pneumatic telescopic rod 41 has a first telescopic end pivoted to the seal door panel 3 and a second telescopic end disposed on the seal mounting frame 12, so that the seal door panel 3 can be pushed to move away from the seal mounting frame 12 by the outward movement of the pneumatic telescopic rod 41 to open the air intake channel of the flow path; alternatively, the retractable movement of the pneumatic telescopic rod 41 can pull the sealing door panel 3 to move towards the sealing installation frame 12, so as to close the air inlet channel of the current path.

Here, the above-mentioned extension and retraction movement of the air-powered retractable rod 41 is controlled by a pneumatic switch 42, and the pneumatic switch 42 is electrically connected to a control circuit of the air-powered retractable rod 41 for controlling the start and stop of the air-powered retractable rod 41.

In some optional embodiments, when the ship is in a non-operating state, the change of the external environment may cause a difference between the internal air pressure of the ship and the external air pressure, and the air inlet duct capable of communicating the inside of the ship with the outside is used as a channel for balancing the internal and external pressures, the ship air inlet filter device disposed in the air inlet duct may also be affected by the air pressure, in order to avoid the occurrence of a situation that the sealing door panel 3 is opened under the action of the air pressure due to an excessive internal and external pressure difference, the ship air inlet filter device further includes a first locking device 7, and the first locking device 7 is disposed in the sealing installation frame 12 and is used for locking the sealing door panel 3 and the sealing installation frame 12 with each other when the sealing door panel 3 is in a closed state.

As shown in fig. 7-9, the present invention further provides a second locking device 5, which comprises a lock housing 51, a hand wheel 52, a stop member 55, a gear reversing assembly, etc.

The gear reversing assembly is arranged in the lock shell 51 and comprises an input gear shaft 53 and an output gear shaft 54 which are perpendicular to each other and are in meshed fit with each other; the non-meshing end of the input gear shaft 53 extends out of the lock shell 51 and is in driving connection with the hand wheel 52; the non-engaging end of the output gear shaft 54 extends outwardly of the lock housing 51 and is drivingly connected to a stop 55; the stop 55 is driven to and from the locked position by rotating the hand wheel 52.

The utility model provides a second locking device 5 can make handle and stop part 55 drive with the mode of non-coaxial rotation through gear reversing assembly to realize the locking and the unblock action of stop part 55, can overcome the problem that can't use because of the coaxial rotatory locking device 5 that boats and ships space restriction caused, improved the range of application of second locking device 5 on boats and ships.

Here, the rotation of the stopper 55 is reversed when the locking operation and the unlocking operation are performed, and when the locking operation is performed, the stopper 55 moves in the direction of a rotation in the drawing, and when the unlocking operation is performed, the stopper 55 moves in the direction opposite to the direction of a rotation.

A first through hole penetrating through one side surface of the lock shell 51 corresponding to the hand wheel 52 is formed in the side surface, and the first through hole is used for enabling the input gear shaft 53 to penetrate out of the side surface; similarly, a second through hole penetrating through one side surface of the lock housing 51 corresponding to the stop block is formed in the side surface, and the second through hole is used for enabling the output gear shaft 54 to penetrate out of the side surface; here, since the input gear shaft 53 and the output gear shaft 54 are perpendicular to each other, the side surface where the first through hole is located and the side surface where the second through hole is located are two surfaces perpendicular to each other.

As an alternative embodiment, the input gear shaft 53 is a rod-shaped structure comprising a straight rod section and a worm section 531 formed with helical teeth connected in series, wherein the free end of the straight rod end is used for driving connection with the hand wheel 52.

The output gear shaft 54 is also a rod-shaped structure, and comprises a straight rod section and a worm wheel section 541 formed with a gear, which are connected in sequence; wherein the free end of the straight rod segment is adapted for driving connection with the stop 55.

The input gear shaft 53 and the output gear shaft 54 are drivingly connected by the meshing engagement of the worm section 531 and the worm wheel section 541.

In this embodiment, the shaft body of the output gear shaft 54 and the worm wheel section 541 are separate structures, and the two are assembled in a sleeving manner; here, the shaft body may be formed by fitting the worm wheel section 541 by means of a key and a key groove, or by fixing both by means of welding.

As an alternative embodiment, the transmission ratio of the worm section 531 to the worm wheel section 541 is 9:2, and the transmission ratio is designed such that the hand wheel 52 can rotate within a small arc range to realize the locking operation of rotating to the locking position and the unlocking operation of moving away from the locking position, which is convenient for the user to use.

As an alternative embodiment, the lock housing 51 is a rectangular housing structure with a hollow interior, and the interior can be used as a receiving space for the input gear shaft 53 and the output gear shaft 54, wherein the free end of the straight rod section of the input gear shaft 53 extends out of the lock housing 51, and the free end of the straight rod section of the output gear shaft 54 extends out of the lock housing 51.

The lock housing 51 includes an upper housing and a lower housing, which are coupled to each other to form a rectangular housing structure.

As an alternative embodiment, a limiting clamping groove is formed inside the lock housing 51, and the limiting clamping groove comprises an upper annular clamping groove 511 and a lower annular clamping groove 512 which are oppositely arranged, wherein a space for accommodating the worm section 531 is defined between the upper annular clamping groove and the lower annular clamping groove 512; the upper end of the worm section 531 is rotatably limited in the upper ring groove 511, and the lower end of the worm section 531 is rotatably limited in the lower ring groove 512.

Therefore, when the user rotates the hand wheel 52, due to the limiting function of the limiting slot, the worm section 531 can only rotate around the axis thereof, so as to further drive the worm wheel section 541 to move, and the stop member 55 moves in different directions.

In the present embodiment, the hand wheel 52 can rotate in the forward direction or the reverse direction, and therefore, the worm section 531 can also perform clockwise rotation motion or counterclockwise rotation motion around the axis thereof; the helical teeth of the worm section 531 may be left-handed or right-handed.

As an alternative embodiment, at least one corner of the lock housing 51 is provided with a screw hole penetrating through the lock housing 51 and a screw 56 provided in the screw hole, and the lock housing 51 is fixed to an external device by the screw 56. For example, in an application scenario where the second locking device 5 is used to lock a ship porthole, the lock housing 51 may be fixed to a sash position of the ship porthole by screw holes and screws 56.

As an alternative embodiment, the end of the lock housing 51, which is provided with a screw hole, is recessed with a screw head slot 57 for receiving the head of the screw 56. In this embodiment, the screw head groove 57 is designed such that the screw head of the screw 56 provided in the screw hole is not higher than the outer surface of the lock housing 51, thereby avoiding the problem that the screw head protrudes partially from the outer surface of the second lock device 5.

As an alternative embodiment, the hand wheel 52 has a first shaft hole at the middle portion thereof, which is fixedly connected to the non-meshing end of the input gear shaft 53, i.e., the overhanging free end of the aforementioned straight rod segment. The non-engaging end may be fixed to the first shaft hole such that the hand wheel 52 may rotate the input gear shaft 53.

As an alternative embodiment, the stop member 55 is an arc-shaped block, one end of the arc-shaped block is a shaft connecting end 551, the shaft connecting end 551 is provided with a second shaft hole formed to penetrate through along the thickness direction, and the second shaft hole is used for fixedly connecting the non-meshing end of the output gear shaft 54. The non-engaging end is the overhanging free end of the straight rod segment as described above. The non-engaging end may be fixed to the second shaft bore such that the output gear shaft 54 rotates the arcuate segments.

As an alternative embodiment, the other end of the stopper 55 is a stopper end 552, and when the stopper 55 is rotated to the locking position, a stopper surface of the stopper end 552 is flush with the bottom surface of the lock housing 51.

As an alternative embodiment, the width of the stopping end 552 of the arc-shaped block is larger than that of the shaft-connecting end 551, so as to increase the contact area of the stopping end 552 and the stopped component and improve the locking effect of the second locking device 5.

In some optional embodiments, the intake air filtering device for the ship further includes the first locking device 7, or referred to as an emergency locking device, where the emergency locking device includes an emergency locking block and a spare screw (not shown in the drawings), where the emergency locking block is an angle iron-shaped folded structure and is disposed at an edge position of the sealing door panel 3, a first side of the emergency locking block is attached and fixed to the sealing door panel 3, and an end of a second side of the emergency locking block is provided with a first threaded hole in which the spare screw is rotatably disposed; correspondingly, the position of the seal mounting frame 12 corresponding to the threaded hole of the second side edge is provided with a corresponding second threaded hole.

When the sealing door plate 3 normally works, the standby screw is arranged at a specific position, and at the position, the standby screw is only positioned in the first threaded hole and cannot interfere with the opening and closing of the sealing door plate 3; and under the condition that the emergency door is closed, if the pneumatic device is damaged and cannot be closed, the spare screw can be used for manually selecting downwards, so that the spare screw can be simultaneously matched with the first threaded hole and the second threaded hole, the sealing door plate 3 is screwed and closed in a manual mode, and the reliability of the air inlet filtering device of the ship is further ensured.

In some alternative embodiments, for a ship operating in a low-temperature environment, water vapor in a sea river may enter the interior of the ship body along with the air inlet channel of the ship, and due to the low ambient temperature, the water vapor is prone to freeze in the air inlet channel of the ship, and is particularly prone to condense on the sealing door panel 3, which may cause the sealing door panel 3 and the sealing installation frame 12 to freeze to each other, resulting in a problem that the sealing door panel 3 cannot be opened; to above-mentioned problem, boats and ships air inlet filter still is provided with anti-icing device, sets up on sealing door panel 3 for the frost that the heating melts and condenses in sealing door panel 3 is melted, in order to guarantee the operation that opens and shuts that sealing door panel 3 can be normal.

In some optional embodiments, the anti-icing device comprises an electric heating gasket 61 and a power supply circuit 62, wherein the electric heating gasket 61 is attached to the sealing door panel 3, the power supply circuit 62 is electrically connected with a marine power supply of a ship in a switchable manner, and the start and stop of heating of the electric heating gasket 61 can be controlled by controlling the switching on and off of the power supply circuit 62; the electric heating gasket 61 is arranged in the resistance wire and the like, and can convert electric energy into heat energy and transmit the heat energy to the sealing door plate 3, so that the temperature of the sealing door plate 3 is increased, and frost condensed on the sealing door plate 3 and the sealing installation frame 12 is melted.

Alternatively, since the frost affecting the opening of the seal door panel 3 is mainly concentrated at the peripheral position between the seal door panel 3 and the seal-mounting frame 12, in the embodiment, the electric heating gasket 61 is provided at the peripheral position between the seal door panel 3 and the seal-mounting frame 12, so that the heat generated by the electric heating gasket 61 can preferentially melt the frost at the peripheral position.

In some alternative embodiments, the present invention also provides a vessel having any of the intake air filter arrangements shown in the various embodiments described above.

The above description is only for the specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention should be covered by the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims (10)

1. A ship air inlet filtering device is characterized by comprising

The air inlet frame is of a hollow structure of an air inlet channel, a filtering installation frame is arranged on the air inlet side, and a sealing installation frame is arranged on the air outlet side;

the filtering grid is arranged on the filtering and installing frame and used for filtering impurities in the air inlet flow;

the sealing door plate is connected to the sealing installation frame in an openable and closable manner so as to conduct or block the air inlet channel;

and one end of the first locking device is fixedly connected with the sealing door plate, and the other end of the first locking device is detachably connected with the sealing installation frame.

2. The marine intake air filter of claim 1, wherein the intake frame is of a rectangular tubular configuration;

the filter grid is embedded in the filter mounting frame.

3. The marine intake air filter of claim 1, further comprising a drive mechanism for controllably driving the sealing door panel to open and close.

4. The marine intake air cleaner of claim 3, wherein the drive mechanism comprises:

the first telescopic end of the pneumatic telescopic rod is pivoted to the sealing door plate, and the second telescopic end of the pneumatic telescopic rod is arranged on the sealing installation frame;

and the pneumatic switch is electrically connected with the control circuit of the pneumatic telescopic rod and used for controlling the starting and stopping of the pneumatic telescopic rod.

5. The marine intake air filter of claim 1, wherein:

first locking device is including emergent latch segment and reserve screw, emergent latch segment is angle bar form book shape structure, the first side subsides of emergent latch segment are established and are fixed in on the sealing door board, and first screw hole has been seted up to the tip on the second side, and reserve screw is rotatable to be set up in this threaded hole.

6. The marine intake air cleaner of claim 5, further comprising a second locking device comprising a lock housing, a hand wheel, a stop member, and a gear reversing assembly, wherein the gear reversing assembly is disposed within the lock housing, the gear reversing assembly comprising an input gear shaft and an output gear shaft disposed perpendicular to each other and in meshing engagement; the non-meshing end of the input gear shaft extends out of the lock shell and is in driving connection with the hand wheel; the non-meshing end of the output gear shaft extends out of the lock shell and is in driving connection with the stop piece; the hand wheel is rotated to drive the stop piece to rotate to a locking position and to be far away from the locking position.

7. The intake air filtering device for the ship as claimed in claim 1, further comprising an anti-icing device disposed on the sealing door panel for heating and melting frost condensed on the sealing door panel.

8. The marine intake air cleaner of claim 7, wherein the anti-icing assembly comprises:

the electric heating gasket is attached to the sealing door plate;

and the power supply circuit is electrically connected with the ship power supply of the ship in a switching mode.

9. The marine air intake filter of claim 8, wherein an electrically heated gasket is disposed at a peripheral location between the seal door panel and the seal mounting frame.

10. A marine vessel having a marine intake air filter arrangement as claimed in any one of claims 1 to 9.

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