CN220632814U - Marine fireproof air brake with excellent explosion-proof performance - Google Patents

Abstract

A marine fireproof air brake with excellent explosion-proof performance comprises an air brake body, wherein the air brake body is provided with a brake body inner cavity; a plurality of flashboards which are arranged in the inner cavity of the flashboard and can rotate; the rod piece shell is arranged at the upper end of the air brake body; the transmission assembly comprises a bottom transmission shaft, a driving shaft, a plurality of driven shafts and connecting rods, wherein the bottom transmission shaft is connected to the bottom of a flashboard positioned in the middle of the inner cavity of the brake body, the driving shaft is connected to the top of the flashboard positioned in the middle of the inner cavity of the brake body, the driven shafts are connected to the top ends of the rest flashboard in the inner cavity of the brake body, and the connecting rods are arranged in the rod shell; the explosion-proof box is arranged below the air brake body, an inner cavity of the explosion-proof box is arranged in the explosion-proof box, a terminal block is arranged in the inner cavity of the explosion-proof box, and a plurality of wiring ports are arranged on the outer wall of the explosion-proof box; the electric opening and closing mechanism is arranged in the explosion-proof box, and the lower end part of the driving shaft downwards extends out of the air brake body, extends into the explosion-proof box and is in transmission connection with the electric opening and closing mechanism. The advantages are that: compact structure, maintenance are convenient, promote the explosion-proof performance and the convenience of using of whole equipment.

Description

Marine fireproof air brake with excellent explosion-proof performance

Technical Field

The utility model belongs to the technical field of marine facility equipment, and particularly relates to a marine fireproof air brake with excellent explosion-proof performance.

Background

The conventional fireproof air brake is mainly applied to air pipes of air conditioners and ventilation systems needing fireproof such as various ships and offshore oil platforms, the conventional fireproof air brake is applied to the air pipe systems in the structural form of ventilation opening and air breaking closing, and the functions of reducing the oxygen content of a protected space (cutting off the communication between the protected space and the outside atmosphere) and preventing fire spreading and the like are achieved through closing. Specifically, a fire damper for a ship generally includes a circular frame, a pneumatic actuator mounted outside the frame, and a plurality of shutter blades rotatable inside the frame and having edges capable of adhering to the inner side walls of the frame, the shutter blades being formed of sheet metal members. The pneumatic actuating device can drive the flashboard blades to rotate, and the pneumatic actuating device drives all the flashboard blades to rotate together to a state that the air circulation direction in the air brake is vertical, so that the air duct is cut off, the air brake is closed, and fire and smoke are prevented from spreading through the air duct. However, the pneumatic actuating device in the existing fireproof air brake is generally arranged outside the frame, and when the pneumatic actuating device works by mistake or at high temperature, the body of the pneumatic actuating device is easy to crack or even fire or explosion and the like, so that the inside of the frame body and the air pipe are influenced or even destroyed, and the overall safety is poor; meanwhile, the existing pneumatic execution device is exposed outside and is easy to be interfered and influenced by the external environment, and the protection of the pneumatic execution device is not in place.

In view of the above-described prior art, there is a need for a reasonable improvement in the structure of existing fire protection dampers. To this end, the applicant has made an advantageous design, and the technical solutions described below are produced in this context.

Disclosure of Invention

The utility model aims to provide the marine fireproof air brake with the excellent explosion-proof performance, which is compact in structure and convenient to maintain, and solves the problems of insufficient protection and poor overall safety of a pneumatic actuating mechanism in the prior art by additionally arranging the explosion-proof box, thereby being beneficial to improving the explosion-proof performance and the use convenience of the overall equipment.

The utility model aims at achieving the aim, namely a marine fireproof air brake with excellent explosion-proof performance, which comprises an air brake body, wherein the air brake body is hollow and is formed with a brake body inner cavity; a plurality of shutters rotatably disposed in the shutter inner chamber, the plurality of shutters being rotatable and combined with each other to form an integral structure; the rod piece shell is fixedly arranged at the upper end of the air brake body; the transmission assembly comprises a bottom transmission shaft, a driving shaft, a plurality of driven shafts and a connecting rod, wherein the bottom transmission shaft is connected to the bottom position of a flashboard positioned in the middle of the inner cavity of the brake body, the driving shaft is connected to the top position of the flashboard positioned in the middle of the inner cavity of the brake body and is in transmission connection with the connecting rod, the driven shafts are connected to the top positions of the rest flashboards in the inner cavity of the brake body and are in transmission connection with the connecting rod, and the connecting rod is arranged in the rod shell; the explosion-proof box is arranged below the air brake body, an inner cavity of the explosion-proof box is formed in the explosion-proof box, a terminal block is arranged in the inner cavity of the explosion-proof box, and a plurality of wiring ports are further formed on the outer wall of the explosion-proof box; the electric opening and closing mechanism is fixedly arranged in the explosion-proof box, and the lower end part of the driving shaft downwards extends out of the air brake body, extends into the explosion-proof box and is in transmission connection with the electric opening and closing mechanism.

In a specific embodiment of the present utility model, the damper body is configured in a cylindrical shape; the bottom cavity wall of the inner cavity of the air brake body is provided with a gate bottom positioning seat in a positioning way, the top cavity wall of the inner cavity of the air brake body is also provided with a gate top positioning seat in a positioning way, the bottom end parts of a plurality of gate plates are all pivotally supported on the gate bottom positioning seat, the top end parts of a plurality of gate plates are all pivotally supported on the gate top positioning seat, the bottom transmission shaft passes through the gate bottom positioning seat and is in running fit with the gate bottom positioning seat, and the driving shaft and a plurality of driven shafts pass through the gate top positioning seat and are in running fit with the gate top positioning seat; and an automatic stop pin is further arranged on the gate bottom positioning seat and at the bottom end position corresponding to the gate positioned in the middle of the inner cavity of the gate, and a stop pin positioning sleeve is further connected to the bottom of the automatic stop pin, and downwards penetrates through the air gate body and is connected with the explosion-proof box.

In another specific embodiment of the utility model, a gate bottom shaft sleeve is arranged on the gate bottom positioning seat and at the positions corresponding to a plurality of gates, a bottom transmission shaft at the bottom position of the gate in the middle of the gate inner cavity penetrates through the gate bottom shaft sleeve corresponding to the bottom transmission shaft sleeve and realizes pivot fit, the bottoms of the rest gates on two sides of the gate in the middle are connected with gate bottom pivot shafts, and the gate bottom pivot shafts penetrate into the gate bottom shaft sleeves corresponding to the gate bottom shaft sleeves respectively and realize pivot fit; and the top positioning seats of the flashboard are provided with top shaft sleeves of the flashboard at positions corresponding to the flashboard, the top shaft sleeves of the flashboard are vertically arranged and extend into the inner cavity of the rod piece shell, the top shaft sleeves of the flashboard and the rod piece shell are fixedly arranged together, and the driving shaft and the driven shafts are respectively penetrated into the top shaft sleeves of the flashboard corresponding to the driving shaft and the driven shafts and realize mutual pivotal fit.

In still another specific embodiment of the present utility model, a first gate limiting block i and a second gate limiting block ii are disposed in the inner cavity of the gate body, where the first gate limiting block i is fixedly mounted on the inner cavity wall of the inner cavity of the gate body at a position corresponding to a middle of left ends of the gate bottom positioning seat and the gate top positioning seat, and the second gate limiting block ii is fixedly mounted on the inner cavity wall of the inner cavity of the gate body at a position corresponding to a middle of right ends of the gate bottom positioning seat and the gate top positioning seat, and the first gate limiting block i and the second gate limiting block ii can respectively be matched and abutted with two gate plates at left and right ends of the inner cavity of the gate body.

In still another specific embodiment of the present utility model, the plurality of shutter plates each include a pair of shutter panels disposed at intervals and a heat insulating layer, the peripheral edges of the two shutter panels being joined to each other to form an integral closed structure, the heat insulating layer filling the closed space between the two shutter panels.

In yet another specific embodiment of the present utility model, a shutter mating portion is formed at opposite edge positions of two adjacent shutters, the shutter mating portion includes a shutter mating protrusion and a shutter mating groove, the shutter mating portions of two adjacent shutters can be mated with each other in a staggered manner and form a mutually compensating connection structure, and the shutter mating protrusion of one shutter can be snapped with the shutter mating groove of the adjacent shutter; and the two flashboard boards of the flashboard are provided with a flashboard sealing wing plate which extends outwards in the length direction corresponding to the edge position of the flashboard matching protruding block, the flashboard sealing wing plate is of a fork-shaped structure, and when two adjacent flashboard boards are connected, the flashboard sealing wing plate on one flashboard can be clamped and abutted to the flashboard panel on the adjacent flashboard, so that the airtight connection between the two adjacent flashboard boards is realized.

In a further specific embodiment of the present utility model, the shutter panel is a thin steel plate having elasticity; the heat insulation layer is a ceramic cotton layer.

In a further specific embodiment of the present utility model, the transmission assembly further includes a plurality of hinge rods, the number of the hinge rods corresponds to the number of the shutters, one ends of the hinge rods are hinged with the connecting rods, and one hinge rod located at the middle position of the connecting rod is hinged with the driving shaft, so that the driving shaft is in transmission connection with the connecting rod; the other hinging rods connected to the connecting rods are hinged with the corresponding driven shafts respectively, so that the driven shafts are in transmission connection with the connecting rods.

In yet another specific embodiment of the present utility model, the explosion-proof box is in a cuboid shape, and a mounting frame plate is further disposed in an inner cavity of the explosion-proof box, and the terminal block and the electric opening and closing mechanism are fixedly mounted on the mounting frame plate; and the bottom panel of the explosion-proof box is also provided with an explosion-proof box opening, and the explosion-proof box opening is also provided with an explosion-proof box cover plate for opening and closing the explosion-proof box opening.

In yet another specific embodiment of the present utility model, a ring of damper body flange plates is formed on the outer circumferential side wall of the damper body, and a plurality of fixing flange holes are provided on the damper body flange plates at intervals.

The beneficial effects of the utility model are as follows: firstly, an explosion-proof box is arranged at the lower part of a wind gate body, the explosion-proof box can cover an electric opening and closing mechanism, so that the electric opening and closing mechanism is prevented from being broken due to misoperation or high temperature and the influence of fire explosion on the inside of the wind gate body and a wind pipe is prevented, meanwhile, the explosion-proof box can also be used for efficiently protecting the electric opening and closing mechanism, the influence of the surrounding environment on the electric opening and closing mechanism is avoided, and the safety is further improved; in addition, through the arrangement of the terminal strip and the wiring port, the interface of the electric opening and closing mechanism can be integrated in a relatively closed environment, so that the safety and the use convenience are further improved; furthermore, through setting up the flashboard cooperation portion that can mutually staggered and cooperate on the edge position of two adjacent flashboards, help realizing reliable sealed effect between two adjacent flashboard to through being equipped with the flashboard seal pterygoid lamina on the flashboard panel, when the polylith flashboard is combined each other, the flashboard seal pterygoid lamina can laminate on adjacent flashboard panel, further plays superior airtight effect to the clearance between two adjacent flashboard, thereby promotes the security.

Drawings

FIG. 1 is a schematic diagram of the structure of the present utility model;

fig. 2 is a structural sectional view of the shutter plate in the open state in the present utility model;

fig. 3 is a structural cross-sectional view of the shutter in the present utility model in a closed state.

In the figure: 1. the air brake comprises an air brake body, an air brake body inner cavity, an air brake bottom positioning seat, a brake plate bottom shaft sleeve and an air brake top positioning seat, wherein the air brake bottom positioning seat is arranged at 1111, the brake plate top positioning seat is arranged at 1121, the brake plate top shaft sleeve is arranged at 113, a first brake plate limiting block I and a second brake plate limiting block II are arranged at 114, an automatic stop pin is arranged at 12, the stop pin positioning sleeve is arranged at 121, the air brake body flange plate is arranged at 13, and the flange hole is fixed at 131; 2. the device comprises a flashboard, a flashboard panel, a flashboard sealing wing plate, a heat insulation layer, a flashboard matching part, a flashboard matching convex block and a flashboard matching groove, wherein the flashboard panel and the flashboard sealing wing plate are 211, the heat insulation layer and the flashboard matching part are 23, the flashboard matching convex block and the flashboard matching groove are 231; 3. a lever housing; 4. the driving assembly, 41, the bottom driving shaft, 42, the driving shaft, 43, the driven shaft, 44, the connecting rod, 45 and the hinging rod; 5. the explosion-proof box comprises an explosion-proof box body and a mounting frame plate, wherein the explosion-proof box body comprises an explosion-proof box cavity 51, a terminal block 52, a wiring port 54, a mounting frame plate 55, an explosion-proof box opening 56 and an explosion-proof box cover plate; 6. an electric opening and closing mechanism; 7. the bottom of the flashboard is pivoted with a shaft.

Detailed Description

The following detailed description of specific embodiments of the utility model, while given in connection with the accompanying drawings, is not intended to limit the scope of the utility model, and any changes that may be made in the form of the inventive concepts described herein, without departing from the spirit and scope of the utility model.

In the following description, all concepts related to the directions (or azimuths) of up, down, left, right, front and rear are directed to the position states where the drawings are being described, so as to facilitate public understanding, and thus should not be construed as being particularly limiting to the technical solutions provided by the present utility model.

Referring to fig. 1 to 3, there is shown a fire-proof damper for a ship having superior explosion-proof performance, comprising a damper body 1, the damper body 1 being hollow in the interior and formed with a damper body cavity 11; a plurality of shutters 2 rotatably disposed in the shutter body inner chamber 11, and the plurality of shutters 2 being rotatable and combined with each other to form a unitary structure, thereby realizing the internal closure of the shutter body inner chamber 11; a rod member housing 3 fixedly disposed at the upper end of the damper body 1; a transmission assembly 4 comprising a bottom transmission shaft 41, a driving shaft 42, a plurality of driven shafts 43 and a connecting rod 44, wherein the bottom transmission shaft 41 is connected to the bottom position of the shutter 2 positioned in the middle of the inner cavity 11 of the shutter body, the driving shaft 42 is connected to the top position of the shutter 2 positioned in the middle of the inner cavity 11 of the shutter body, the driving shaft 42 is in transmission connection with the connecting rod 44, the driven shafts 43 are connected to the top positions of the rest of the shutters 2 in the inner cavity 11 of the shutter body and in transmission connection with the connecting rod 44, and the connecting rod 44 is arranged in the rod housing 3; an explosion proof box 5, wherein the explosion proof box 5 is arranged at the lower position of the air brake body 1, an explosion proof box inner cavity 51 is formed in the explosion proof box 5, a terminal block 52 is arranged in the explosion proof box inner cavity 51, and a plurality of wiring ports 53 are also arranged on the outer wall of the explosion proof box 5; an electric opening and closing mechanism 6, the aforesaid electric opening and closing mechanism 6 fixed mounting is in explosion proof box 5, the aforesaid air brake gate body 1 of lower extreme tip of aforesaid driving shaft 42 stretches out downwards into in the explosion proof box 5 and with this electric opening and closing mechanism 6 transmission connection, and aforesaid terminal strip 52 can connect aforesaid wiring port 53 and electric opening and closing mechanism 6 to make the wiring pleasing to the eye, and the connecting wire can evenly arrange, also can further promote the security when conveniently maintaining and overhauling.

In this embodiment, the damper body 1 is configured in a cylindrical shape; a shutter bottom positioning seat 111 is positioned and installed on the bottom cavity wall of the shutter body inner cavity 11 of the air shutter body 1, a shutter top positioning seat 112 is also positioned and installed on the top cavity wall of the shutter body inner cavity 11 of the air shutter body 1, bottom end parts of a plurality of the shutters 2 are pivotally supported on the shutter bottom positioning seat 111, top end parts of a plurality of the shutters 2 are pivotally supported on the shutter top positioning seat 112, the bottom transmission shaft 41 passes through the shutter bottom positioning seat 111 and is in running fit with the shutter bottom positioning seat 111, and the driving shaft 42 and a plurality of driven shafts 43 pass through the shutter top positioning seat 112 and are in running fit with the shutter top positioning seat 112; an automatic stop pin 12 is also arranged on the gate bottom positioning seat 111 and at the bottom end position corresponding to the gate 2 positioned in the middle of the inner cavity 11 of the gate body, a stop pin positioning sleeve 121 is also connected to the bottom of the automatic stop pin 12, and the stop pin positioning sleeve 121 passes downwards through the air gate body 1 and is connected with the explosion proof box 5.

It should be noted that, since the electric opening and closing mechanism 6 shown in fig. 1 is a mechanism and a principle of action, which are common knowledge, reference may be made to a "limit switch pneumatic actuator" or the like described in chinese patent document CN110131470a, specifically: the electric opening and closing mechanism 6 is matched with an electromagnetic valve and the like, when the pneumatic opening and closing mechanism 6 is electrified, the air cylinder in the pneumatic opening and closing mechanism 6 works, the transmission assembly 4 is driven to rotate by compressed air, the plurality of gate plates 2 are rotated to be opened, before the automatic stop pin 12 shown in fig. 1 is retracted from the gate plates 2, and as shown in fig. 2, the plurality of gate plates 2 are kept in a spaced parallel state to realize the conduction of the inner part of the inner cavity 11 of the gate; when the pneumatic opening and closing mechanism 6 loses electricity, the air cylinder reversely rotates for 180 degrees, the plurality of flashboards 2 are driven by the transmission assembly 4 to turn over and move to a horizontal state to realize the mutual engagement of the plurality of flashboards 2, and as shown in fig. 3, the horizontal state of the plurality of flashboards 2 is mutually engaged to realize the sealing of the inner part of the brake inner cavity 11.

In the present embodiment, a shutter bottom boss 1111 is mounted on the shutter bottom positioning seat 111 at a position corresponding to a plurality of the shutter plates 2, a bottom transmission shaft 41 at a bottom position of the shutter plate 2 located in the middle of the shutter body inner chamber 11 passes through the shutter bottom boss 1111 corresponding thereto and achieves pivot fitting, the bottoms of the remaining shutter plates 2 located at both sides of the middle shutter plate 2 are connected with shutter bottom pivot shafts 7, and a plurality of the shutter bottom pivot shafts 7 are inserted into the respective corresponding shutter bottom bosses 1111 and achieve pivot fitting with each other; and a plurality of gate top shaft sleeves 1121 are arranged on the gate top positioning seat 112 and at positions corresponding to the plurality of gate plates 2, the plurality of gate top shaft sleeves 1121 are vertically arranged and extend into the inner cavity of the rod shell 3, the plurality of gate top shaft sleeves 1121 and the rod shell 3 are fixedly arranged together, and the driving shaft 42 and the plurality of driven shafts 43 are respectively penetrated in the corresponding gate top shaft sleeves 1121 and realize pivot fit with each other.

Further, a first gate stopper i 113 and a second gate stopper ii 114 are disposed in the gate inner cavity 11, the first gate stopper i 113 is fixedly mounted on the inner cavity wall of the gate inner cavity 11 at a position corresponding to the middle between the left ends of the gate bottom positioning seat 111 and the gate top positioning seat 112, the second gate stopper ii 114 is fixedly mounted on the inner cavity wall of the gate inner cavity 11 at a position corresponding to the middle between the right ends of the gate bottom positioning seat 111 and the gate top positioning seat 112, and the first gate stopper i 113 and the second gate stopper ii 114 can respectively be matched and abutted with two gates 2 at the left end and the right end of the gate inner cavity 11; the damper brake body 1 has a cylindrical structure, and the left edge of the left shutter 2 and the right edge of the right shutter 2 of the plurality of shutters 2 are circular arcs, so that the first shutter stopper i 113 and the second shutter stopper ii 114 are circular arcs.

Referring to fig. 2 and 3, the plurality of shutter plates 2 each include a pair of shutter plates 21 and a heat insulating layer 22 disposed at intervals, wherein the peripheral edges of the two shutter plates 21 are connected to each other to form an integral closed structure, and the heat insulating layer 22 is filled in the closed space between the two shutter plates 21.

In the present embodiment, a shutter engagement portion 23 is formed at opposite edge positions of two adjacent ones of the aforementioned shutters 2, the shutter engagement portion 23 includes a shutter engagement projection 231 and a shutter engagement groove 232, the shutter engagement portions 23 between each other can be engaged with each other in a staggered manner and formed as a mutually compensating connection structure when the adjacent two shutters 2 are engaged, and the shutter engagement projection 231 on one shutter 2 can be engaged with the shutter engagement groove 232 on the adjacent shutter 2 with each other; and a gate sealing wing plate 211 extending outwards is formed at the edge position of the two gate panels 21 of the gate 2 corresponding to the gate matching protruding block 231 in the length direction, the gate sealing wing plate 211 is in a fork-shaped structure, and when two adjacent gate panels 2 are jointed, the gate sealing wing plate 211 on one gate panel 2 can be clamped and abutted to the gate panel 21 on the adjacent gate panel 2, so that the airtight connection between the two adjacent gate panels 2 is realized.

Preferably, the shutter panel 21 is a thin steel plate having elasticity; the heat insulating layer 22 is a ceramic cotton layer, and of course, the heat insulating layer 22 may be a rock wool layer, an asbestos layer or a glass fiber layer, which are all within the scope of protection of this patent.

Further, the transmission assembly 4 further includes a plurality of hinge rods 45, and the number of the hinge rods 45 corresponds to that of the gate plates 2, one ends of the hinge rods 45 are hinged with the connecting rod 44, and one hinge rod 45 located at the middle position of the connecting rod 44 is hinged with the driving shaft 42, so as to realize transmission connection between the driving shaft 42 and the connecting rod 44; the rest of the hinge rods 45 connected to the connecting rod 44 are hinged with the corresponding driven shafts 43, so that the driven shafts 43 are in transmission connection with the connecting rod 44.

With continued reference to fig. 1, the explosion-proof box 5 has a rectangular parallelepiped shape, and a mounting plate 54 is further disposed in the explosion-proof box cavity 51 of the explosion-proof box 5, and the terminal block 52 and the electric opening and closing mechanism 6 are fixedly mounted on the mounting plate 54; an explosion-proof box opening 55 is further formed on the bottom plate of the explosion-proof box 5, and an explosion-proof box cover 56 for opening and closing the explosion-proof box opening 55 is further disposed on the explosion-proof box opening 55.

Preferably, a ring of damper body flange plates 13 is formed on the outer peripheral side wall of the damper body 1, and a plurality of fixing flange holes 131 are formed on the damper body flange plates 13 at intervals; when the air lock body 1 is mounted, the air lock body 1 and the cabin wall are fixedly connected together by arranging bolts in the fixing flange holes 121.

Referring to fig. 1 in combination with fig. 2 and 3, since it has been mentioned above that the electric opening and closing mechanism 6 is ventilated when in the energized state, the cylinder inside the electric opening and closing mechanism works to drive the bottom transmission shaft 41 of the transmission assembly 4 to rotate and drive the middle gate plate 2 to rotate, and the middle gate plate 2 further drives the driving shaft 42 and the connecting rod 44 to move, so that the driven shaft 43 further drives the gate plates 2 at both sides of the middle gate plate 2 to rotate 90 degrees, thereby realizing the opening of a plurality of gate plates 2 and presenting the state shown in fig. 2; when the shutter 2 is required to be closed in an emergency such as a fire in the cabin, the electric opening and closing mechanism 6 is de-energized and de-energized, and the plurality of shutters 2 are rotated in the reverse direction and engaged with each other in a horizontal state as shown in fig. 3, thereby closing the inside of the lock body chamber 11.

In summary, the technical scheme provided by the utility model overcomes the defects in the prior art, successfully completes the task of the utility model, and faithfully honors the technical effects carried in the technical effect column of the applicant.

Claims (10)

1. A marine fire prevention air brake that possesses superior explosion-proof performance, its characterized in that: comprises a wind gate body (1), wherein the wind gate body (1) is hollow and is formed with a gate body inner cavity (11); a plurality of flashboard (2) rotatably arranged in the inner cavity (11) of the flashboard body, and the flashboard (2) can rotate and combine with each other to form an integral structure; a rod piece shell (3) fixedly arranged at the upper end of the air brake body (1); the transmission assembly (4) comprises a bottom transmission shaft (41), a driving shaft (42), a plurality of driven shafts (43) and a connecting rod (44), wherein the bottom transmission shaft (41) is connected to the bottom position of the flashboard (2) positioned in the middle of the inner cavity (11) of the brake body, the driving shaft (42) is connected to the top position of the flashboard (2) positioned in the middle of the inner cavity (11) of the brake body, the driving shaft (42) is in transmission connection with the connecting rod (44), the driven shafts (43) are connected to the top positions of the rest flashboard (2) in the inner cavity (11) of the brake body and are in transmission connection with the connecting rod (44), and the connecting rod (44) is arranged in the rod shell (3); the explosion-proof box (5) is arranged below the air brake body (1), an explosion-proof box inner cavity (51) is formed in the explosion-proof box (5), a terminal row (52) is arranged in the explosion-proof box inner cavity (51), and a plurality of wiring ports (53) are further formed in the outer wall of the explosion-proof box (5); the electric opening and closing mechanism (6) is fixedly arranged in the explosion-proof box (5), and the lower end part of the driving shaft (42) downwards extends out of the air brake body (1) and extends into the explosion-proof box (5) to be in transmission connection with the electric opening and closing mechanism (6).

2. A fire damper for a ship having superior explosion protection performance according to claim 1, wherein: the air brake body (1) is in a cylindrical structure; the bottom cavity wall of the inner cavity (11) of the air brake body (1) is provided with a brake plate bottom positioning seat (111) in a positioning way, the top cavity wall of the inner cavity (11) of the air brake body (1) is also provided with a brake plate top positioning seat (112) in a positioning way, the bottom end parts of a plurality of brake plates (2) are all pivotally supported on the brake plate bottom positioning seat (111), the top end parts of a plurality of brake plates (2) are all pivotally supported on the brake plate top positioning seat (112), the bottom transmission shaft (41) passes through the brake plate bottom positioning seat (111) and is in rotary fit with the same, and the driving shaft (42) and a plurality of driven shafts (43) pass through the brake plate top positioning seat (112) and are in rotary fit with the same; an automatic stop pin (12) is further arranged on the gate bottom positioning seat (111) and at the bottom end position corresponding to the gate plate (2) positioned in the middle of the gate inner cavity (11), a stop pin positioning sleeve (121) is further connected to the bottom of the automatic stop pin (12), and the stop pin positioning sleeve (121) downwards penetrates through the air gate body (1) and is connected with the explosion-proof box (5).

3. A fire damper for a ship having superior explosion protection performance according to claim 2, wherein: a gate bottom shaft sleeve (1111) is arranged on the gate bottom positioning seat (111) and at the position corresponding to a plurality of gate plates (2), a bottom transmission shaft (41) at the bottom position of the gate plate (2) in the middle of the gate inner cavity (11) penetrates through the gate bottom shaft sleeve (1111) corresponding to the gate bottom shaft sleeve and realizes pivot fit, the bottoms of the rest gate plates (2) at two sides of the middle gate plate (2) are connected with gate bottom pivot shafts (7), and a plurality of gate bottom pivot shafts (7) penetrate into the corresponding gate bottom shaft sleeves (1111) and realize pivot fit; and a plurality of gate top shaft sleeves (1121) are vertically arranged and extend into the inner cavity of the rod shell (3) at positions corresponding to the gate top positioning seats (112) and the gate top shaft sleeves (1121), the gate top shaft sleeves (1121) and the rod shell (3) are fixedly arranged together, and the driving shaft (42) and the driven shafts (43) are respectively arranged in the gate top shaft sleeves (1121) corresponding to the driving shaft and the driven shafts in a penetrating manner and realize pivot fit.

4. A fire damper for a ship having superior explosion protection performance according to claim 2 or 3, wherein: still be equipped with first flashboard stopper I (113) and second flashboard stopper II (114) of corresponding setting among the floodgate body inner chamber (11), first flashboard stopper I (113) are corresponding to flashboard bottom positioning seat (111) with the position department fixed mounting in the middle of the left end of flashboard top positioning seat (112) is in on the inner chamber wall of floodgate body inner chamber (11), second flashboard stopper II (114) then be corresponding to flashboard bottom positioning seat (111) with the position department fixed mounting in the middle of the right-hand member of flashboard top positioning seat (112) is in on the inner chamber wall of floodgate body inner chamber (11), just first flashboard stopper I (113) and second flashboard stopper II (114) can cooperate the butt together with two flashboard (2) that are in floodgate inner chamber (11) left and right sides both ends respectively.

5. A fire damper for a ship having superior explosion protection performance according to claim 1, wherein: the plurality of flashboard panels (2) comprise a pair of flashboard panels (21) and a heat insulation layer (22) which are arranged at intervals, the peripheral edges of the two flashboard panels (21) are connected and jointed with each other to form an integral closed structure, and the heat insulation layer (22) is filled in a closed space between the two flashboard panels (21).

6. The marine fire damper with excellent explosion protection according to claim 5, wherein: a shutter mating portion (23) is formed at opposite edge positions of two adjacent shutters (2), the shutter mating portion (23) includes a shutter mating protrusion (231) and a shutter mating groove (232), the shutter mating portions (23) of two adjacent shutters (2) can be mated with each other in a staggered manner and form a mutually compensating connection structure, and the shutter mating protrusion (231) of one shutter (2) can be snapped with the shutter mating groove (232) of the adjacent shutter (2); and two flashboard panels (21) length direction of flashboard (2) are corresponding to flashboard cooperation lug (231) edge position department still constitutes one and outwards extends flashboard seal pterygoid lamina (211) that set up, flashboard seal pterygoid lamina (211) are fork-shaped structure, when two adjacent flashboard (2) are joined, flashboard seal pterygoid lamina (211) on one flashboard (2) can the clamp butt to flashboard panel (21) on adjacent flashboard (2) to realize airtight connection between two adjacent flashboard (2).

7. The marine fire damper with excellent explosion protection according to claim 5, wherein: the shutter panel (21) is a thin steel plate with elasticity; the heat insulation layer (22) is a ceramic cotton layer.

8. A fire damper for a ship having superior explosion protection performance according to claim 1, wherein: the transmission assembly (4) further comprises a plurality of hinging rods (45), the number of the hinging rods (45) corresponds to that of the flashboard (2), one ends of the hinging rods (45) are hinged with the connecting rods (44), and one hinging rod (45) positioned at the middle position of the connecting rod (44) is hinged with the driving shaft (42), so that the driving shaft (42) is in transmission connection with the connecting rod (44); the rest of the hinge rods (45) connected to the connecting rods (44) are respectively hinged with the corresponding driven shafts (43), so that the driven shafts (43) are in transmission connection with the connecting rods (44).

9. A fire damper for a ship having superior explosion protection performance according to claim 1, wherein: the explosion-proof box (5) is in a cuboid shape, a mounting frame plate (54) is further arranged in an explosion-proof box inner cavity (51) of the explosion-proof box (5), and the terminal strip (52) and the electric opening and closing mechanism (6) are fixedly arranged on the mounting frame plate (54); an explosion-proof box opening (55) is also arranged on the bottom panel of the explosion-proof box (5), and an explosion-proof box cover plate (56) for opening and closing the explosion-proof box opening (55) is also arranged on the explosion-proof box opening (55).

10. A fire damper for a ship having superior explosion protection performance according to claim 1, wherein: a circle of air brake body flange plates (13) are formed on the peripheral side wall of the air brake body (1), and a plurality of fixing flange holes (131) are formed on the air brake body flange plates (13) at intervals.