CN115231475A - Unloading trolley for refrigerated ship and unloading process - Google Patents

Abstract

The invention discloses a refrigerated ship unloading trolley and an unloading process, wherein the refrigerated ship unloading trolley comprises: the device comprises a cargo suction device, a lifting device, a tray device, a traveling device and a monitoring device; the bottom of the lifting device is installed on the installation frame at the front end of the walking device, the tray device is installed on the installation seat of the lifting device moving platform, the cargo suction device is installed on the upper platform installation seat of the lifting device, and the monitoring device is installed on the installation platform of the cargo suction device. The unloading system can realize unloading operation of cargos with different stack heights, and has the characteristics of less humanization, strong adaptability and the like. The invention has the advantages of high practicability, relatively simple structure, high flexibility of the whole device, easy replacement of parts and easy realization of functions; and the existing equipment technology of the wharf is combined, the original cabin structure is not damaged or modified, and the application value is high.

Description

Unloading trolley for refrigerated ship and unloading process

Technical Field

The invention relates to the technical field of refrigerated ships, in particular to a refrigerated ship unloading trolley and an unloading process.

Background

The refrigerated ship is a special ship for transporting perishable foods such as seafood, meat, fruits, vegetables and the like in a frozen state, and is widely applied. The structure of the cargo hold of the refrigerated ship is complex, and the refrigerated ship mainly shows that the hatch is small, the space in the hold is large, the cargo hold is generally of a multilayer structure, and the height of a single layer can reach 2.3m-3m. The temperature of the cargo hold of the refrigerated ship is maintained at about-20 ℃, the packaging types of the refrigerated transportation are more, the refrigerated transportation comprises a carton box, a kraft paper bag, woven bags and the like, and the stacking mode is mostly in an unordered state. Due to the complexity inside the cargo hold, the existing refrigeration ship unloading operation generally adopts a manual unloading mode, and the problems of high operation intensity, low efficiency, high cost and the like are presented. Especially, the long-time low-temperature environment operation increases the risk of virus infection of unloading workers. Therefore, mechanized and efficient unloading equipment of the refrigerated ship and an operation process thereof become urgent needs for social and economic development.

Disclosure of Invention

According to the problems existing in the prior art, the invention discloses a refrigerated ship unloading trolley, which comprises: the device comprises a cargo suction device, a lifting device, a tray device, a traveling device and a monitoring device;

the bottom of the lifting device is installed on the installation frame at the front end of the walking device, the tray device is installed on the installation seat of the lifting device moving platform, the cargo suction device is installed on the upper platform installation seat of the lifting device, and the monitoring device is installed on the installation platform of the cargo suction device.

The goods suction device comprises a rack seat, a rack I, a rack II, a supporting frame, a module I, a module II, a supporting block, a sucker group, a mounting bracket, a motor, an air compressor and a centrifugal fan; the frame base is fixedly installed on a lifting platform of the lifting device, the frame I is fixedly installed on the side end face of the frame base, the two modules I are fixedly installed at the upper side end of the frame I respectively, the frame II is fixedly installed on a movable sliding block of the module I, the two modules II are fixedly installed at the upper side end of the frame II respectively, the supporting blocks are fixedly installed on the movable sliding blocks of the two modules II, the mounting support is connected with the supporting blocks, the sucking disc group is fixedly installed on the mounting support, the motor is installed on the side end face of the supporting blocks, the output shaft of the motor is connected with the mounting support, and the air compressor and the centrifugal fan are fixedly installed on a mounting base behind a cab of the walking device and are used for adjusting the goods suction work of the suction device through cooperative work.

The lifting device comprises a portal I, a portal II, an inner portal I, an inner portal II, a hydraulic cylinder I, a hydraulic cylinder II, a lifting sliding table, a guardrail and a module; the automatic lifting device is characterized in that the portal I is fixedly connected with the portal II, the inner portal I is nested on the inner sliding track of the portal I and is arranged along the inner sliding track of the portal I to move up and down, the inner portal II is nested on the inner sliding track of the portal II and is arranged along the inner sliding track of the portal II to move up and down, the I bottom end of the hydraulic cylinder is fixedly arranged on a mounting platform at the bottom of the inner portal I, the II bottom end of the hydraulic cylinder is fixedly arranged on the mounting platform at the bottom of the inner portal II, the lifting sliding table is connected with an extension rod of the hydraulic cylinder I through a chain and a chain wheel, the lifting sliding table is arranged under the operation of the hydraulic cylinder II, the inner guide rail of the inner portal I moves up and down, the guardrails are arranged on the upper end face of the inner portal II respectively, the modules are fixedly arranged on the outer side of the inner portal II, the I operates to drive the lifting sliding table to move up and down along the inner sliding track of the inner portal I under the working state, and the hydraulic cylinder II operates to drive the inner portal II to move up and down so as to drive the module to move up and down.

The tray device comprises a fork and a cargo supporting plate, the fork is fixedly arranged on the upper end face of the lifting sliding table, and the cargo supporting plate is detachably connected with the fork.

Running gear is including walking chassis, cockpit, battery pack case, mount pad I and mount pad II, cockpit fixed mounting be in on the crossbeam frame on walking chassis, the battery pack case is installed in the mounting bracket of tip under the cockpit, mount pad I be two and respectively with the mount pad of portal II lower extremities is articulated, mount pad II be two with II lower extreme mount pads of portal are connected, and when the pneumatic cylinder extension between II and the mount pad II of portal, portal II round the mount pad of mount pad I rotates.

The monitoring device comprises a mounting base, a rotating table and high-definition cameras, wherein the two mounting bases are respectively mounted on the rack of the rear end face of the sucker group, the two rotating tables are respectively fixedly mounted on the mounting base, the two high-definition cameras are respectively mounted on the rotating tables, and the rotating tables rotate 180 degrees around the rotating tables.

An unloading process of a refrigeration ship unloading trolley comprises the following steps:

s1, after cargo at a hatch is cleaned, the unloading trolley is conveyed into the cabin from the hatch by a crane, and a plurality of cargo supporting plates are prepared and piled on a deck in the cabin. The personnel in the cabin lay the tuck net which is put into the cabin in advance flat and place the tuck net at the position below the hatch for storing and transferring the goods delivered by the unloading trolley;

s2, after the unloading trolley is placed into the hold, the unloading trolley is driven to pick up a cargo supporting plate placed in the hold onto a cargo fork, the unloading trolley is driven to enter a region to be unloaded and to be close to the region to be unloaded, at the moment, a hydraulic cylinder II is driven to extend to work and drive an inner portal II to move upwards, a driving module group works to drive a cargo suction device to move upwards, after the cargo suction device rises to a proper position, the hydraulic cylinder II and the module group stop moving, at the moment, a module I and a module II are driven to drive the suction cup group to move forwards until the suction cup group contacts the cargo, the module I and the module II stop moving, at the moment, an air compressor and a centrifugal fan are controlled to enable the suction cup group to suck the cargo, the driving module I and the module II retract backwards and drive the suction cup group to move backwards together with the cargo, at the moment, the hydraulic cylinder I is driven to drive a lifting sliding table to further drive the cargo fork and the cargo supporting plate to move upwards to a proper position below the cargo suction device, at the moment, the suction cup group stops working to place the cargo supporting plate on the cargo supporting plate, the cargo supporting plate is driven by the hydraulic cylinder I to adjust the position downwards, the cargo fork and the cargo supporting plate is adjusted to move forwards, and the cargo supporting plate is repeatedly, and the cargo loading operation is repeated;

s3, when the unloading trolley is fully loaded, the unloading trolley reaches the position close to a net bag preset below a hatch opening, the hydraulic cylinder I is driven to drive the fork and the cargo supporting plate to move to proper positions, the cargo supporting plate is placed on the net bag, the unloading trolley is driven to move backwards at the moment, the fork is separated from the cargo supporting plate, the unloading trolley returns to an operation area, and unloading operation is continuously carried out;

s4, when the net bag is fully loaded, the net bag filled with goods is conveyed out of the cabin by using a crane to carry out unloading operation outside the cabin, and meanwhile, workers in the cabin place the net bag below the cabin opening again to cooperate with the unloading trolley to carry out unloading operation continuously;

s5, when the goods in the hold where the unloading trolley is located are not emptied, the unloading trolley is carried out according to the operation flow S2-S4 until the unloading is finished;

and S6, after the current cargo hold is cleaned, opening a next-layer cargo hold cabin door, and executing the unloading operation flows from S1 to S5 until the whole refrigerated ship is cleaned.

Due to the adoption of the technical scheme, the unloading trolley for the refrigerated ship and the operation process thereof provided by the invention have the advantages that the system mainly aims at the unloading requirement of the refrigerated ship, the size of the unloading trolley is miniaturized, the unloading trolley can be well adapted to the environment in a cabin, the cooperative operation of a plurality of trolleys can be realized, and the unloading efficiency is greatly improved. Functionally, the unloading system can realize unloading operation of cargoes with different stack heights, and has the characteristics of less humanization, strong adaptability and the like. The invention has high practicability, relatively simple structure, high flexibility of the whole device, easy replacement of parts and easy realization of functions; and the existing equipment technology of the wharf is combined, the original cabin structure is not damaged or modified, and the application value is high.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the description below are only some embodiments described in the present application, and other drawings can be obtained by those skilled in the art without creative efforts.

FIG. 1 is a schematic view of the general construction of a refrigerated discharge cart according to the present invention;

FIG. 2 is a schematic view of the cargo lift apparatus of the present invention;

FIG. 3 is a schematic view of a portion of the cargo pick-up device of the present invention;

FIG. 4 is a schematic view of a part of the structure of the cargo suction device of the present invention installed on the traveling device;

FIG. 5 is a schematic front view of the lifting device of the present invention;

FIG. 6 is a schematic structural view of a tray device according to the present invention;

FIG. 7 is a schematic structural view of the walking device of the present invention;

FIG. 8 is a schematic view of a monitoring device according to the present invention;

fig. 9 is a working flow chart of the unloading trolley of the invention.

Detailed Description

In order to make the technical solutions and advantages of the present invention clearer, the following makes a clear and complete description of the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention:

as shown in fig. 1, the unloading trolley for the refrigerated ship comprises a cargo suction device 1, a lifting device 2, a tray device 3, a traveling device 4 and a monitoring device 5; the lower end of the lifting device 2 is connected and installed on the installation rack at the front end of the walking device 4 through bolts. The tray device 3 is installed on the installation seat of the lifting device 2 moving platform through bolt connection, and the cargo suction device 1 is installed on the upper platform installation seat of the lifting device 2 through bolt connection. The monitoring device 5 is provided with a mounting seat and is fixedly mounted on a mounting platform of the cargo suction device 1 through bolts.

As shown in fig. 2 to 4, the cargo suction device 1 includes a frame base 11, a frame i 12, a frame ii 13, a supporting frame 14, a module i 15, a module ii 16, a supporting block 17, a suction cup set 18, a mounting bracket 19, a motor 101, an air compressor 102, and a centrifugal fan 103. The machine frame base 11 is fixedly installed on a lifting platform of the lifting device 2 through bolts, the machine frame I is fixedly installed on the end face of the side of the machine frame base 11 through bolts, the two modules I15 are fixedly installed on the upper side end of the machine frame I12 through bolts respectively, the machine frame II 13 is fixedly installed on a movable sliding block of the module I15 through bolts, the two modules II 16 are fixedly installed on the upper side end of the machine frame II 13 through bolts respectively, and the supporting blocks 17 are fixedly installed on the movable sliding blocks of the two modules II 16 through supporting plates and bolts. The mounting bracket 19 is connected with the supporting block 17 through a bearing seat and a bolt, the sucker group 18 is fixedly mounted on the mounting bracket 19 through a bolt, the motor 101 is mounted at the side end of the supporting block 17 through a bearing seat and a bolt, and an output shaft of the motor is fixedly connected with the mounting bracket 19. The air compressor 102 and the centrifugal fan 103 are respectively fixedly installed on an installation base behind the cab of the traveling device 4 through bolts, and the air compressor 102 and the centrifugal fan cooperate with each other to adjust the cargo suction work of the cargo suction device 1. When suction means during operation, at first I operation of module drive frame II and move forward, and then drive the sucking disc group and move forward, wait that I operation of module stops the operation behind the extreme position, II operations of module at this moment drive sucking disc group and continue to move forward until sucking disc group absorbs the goods and stops to move forward. After waiting that suction means inhales the goods, the goods is driven at sucking disc group and module I, module II's operation and is carried out the return motion backward. When the suction device 1 sucks goods on the side, the motor 101 is driven to work to drive the mounting bracket 19 to further drive the sucker group 18 to rotate for 90 degrees, and at the moment, the suction direction of the sucker group 18 is downward, so that the goods can be sucked positively.

As shown in fig. 5, the lifting device 2 generally comprises a gantry i 21, a gantry ii 22, an inner gantry i 211, an inner gantry ii 221, a hydraulic cylinder i 23, a hydraulic cylinder ii 24, a lifting sliding table 25, a guardrail 26 and a module 27. The bottom end parts of the door frame I21 and the door frame II 22 are fixedly connected through bolts, and the middle parts of the door frame I21 and the door frame II 22 are fixedly connected through a connecting plate in a welding mode. The inner door frame I211 is nested and arranged on an inner sliding track of the door frame I21, and the inner door frame I211 can move up and down along the inner sliding track of the door frame I21. The inner door frame II 221 is nested on the inner sliding track of the door frame II 22, and the inner door frame I211 can move up and down along the inner sliding track of the door frame II 22. The bottom end of the hydraulic cylinder I23 is fixedly installed on the installation platform at the bottom of the inner door frame I211 through a bolt, and the bottom end of the hydraulic cylinder II 24 is fixedly installed on the installation platform at the bottom of the inner door frame II 221 through a bolt. The lifting sliding table 25 is connected with an extension rod of the hydraulic cylinder I23 through a chain and a chain wheel, and the lifting sliding table 25 can move up and down along an inner guide rail of the inner door frame I211 under the operation of the hydraulic cylinder II 24. The two guardrails 26 are respectively installed on the upper end face of the inner door frame II 221. The two die sets 27 are fixedly installed on the outer side of the inner door frame II 221 through bolts respectively. During operation I operation of pneumatic cylinder drives lift slip table and is the up-and-down motion along the interior slide rail of interior portal I, and II operations of pneumatic cylinder drive interior portal II reciprocate and then drive the module and carry out the up-and-down motion. The goods suction means 1 is installed on the module 27, so that the up-and-down movement of the goods suction means 1 is realized, and the goods suction means 1 can reach any position of the whole operation height by matching with the movement of the hydraulic cylinder II 24.

As shown in fig. 6, the pallet means 3 includes a fork 31 and a cargo supporting plate 32, the fork 31 is two and is fixedly installed on the upper end surface of the lifting sliding table 25 through bolts, the cargo supporting plate 32 can be used alternatively, the number of the cargo can be changed according to the number of the cargo in the cabin, each cargo supporting plate is structurally two layers, the middle part of the cargo supporting plate is a hollow design, the weight of the cargo supporting plate is reduced to the maximum extent, and through holes matched with the fork 31 are formed in the two side end surfaces. During operation, the fork is inserted into the through hole of the cargo supporting plate to pick up the cargo supporting plate.

As shown in fig. 7, the traveling apparatus 4 generally includes a traveling chassis 41, a cabin 42, a battery pack case 43, a mount i 44, and a mount ii 45. The cockpit 42 is fixedly mounted on a cross beam of the traveling chassis 41, and the battery pack box is mounted in a mounting frame at the lower end of the cockpit 42. The mounting seats I44 are two in number and are hinged with the mounting seats at the lower side end of the door frame II 22 through bolts. And the two mounting seats II 45 are connected with the mounting seat at the lower end of the door frame II 22 through hydraulic cylinders and bolts. When the hydraulic cylinder between the door frame II 22 and the mounting seat II 45 extends, the door frame II 22 can rotate around the mounting seat of the mounting seat I44. The cockpit arranged on the walking device is the positive pressure cabin, so that the walking device can be effectively isolated from the external environment. The environment temperature adjusting device is arranged in the positive pressure cabin, so that a driver can still work comfortably in a low-temperature environment.

As shown in fig. 7 and 8, the monitoring device 5 includes a mounting base 51, a rotating table 52, and a high-definition camera 53. The mounting base 51 is installed on the rack of the rear end face of the sucker group through two bolts, the rotating table 52 is fixedly installed on the mounting base 51 through two bolts, and the high-definition cameras 53 are installed on the rotating table 52. The rotating table 52 has a rotating function, and can rotate 180 ° around itself. The high-definition camera 53 adopts an ultra-high-definition camera with a night vision function, can better adapt to the environment with poor light in the cabin, and further can rotate up and down 180 degrees around the mounting shaft. The monitoring device mainly monitors the working process of the cargo suction device and the working process of the tray device, and the rotating function of the rotating platform 52 and the rotating function of the high-definition camera 53 are combined and applied to the unloading working process, so that the state pictures of the goods sucked and the goods placed by the unloading trolley are accurately transmitted to a driver in a cab.

As shown in fig. 9, the unloading process of the unloading trolley of the refrigeration ship specifically comprises the following steps:

s1, after cargo at the hatch is cleaned, the unloading trolley is conveyed into the cabin from the hatch by a crane, and a plurality of cargo supporting plates 32 are prepared and piled on a deck in the cabin. The personnel in the cabin lay the tuck net which is put into the cabin in advance flat and place the tuck net at the position below the hatch for storing and transferring the goods delivered by the unloading trolley;

and S2, after the unloading trolley is placed in the hold, driving the unloading trolley to pick up the goods supporting plate 32 placed in the hold onto the goods fork 31, driving the unloading trolley to enter a region to be unloaded and to be close to a material region to be unloaded, driving the hydraulic cylinder II 24 to extend to work at the moment, and further driving the inner door frame II 221 to move upwards. The driving module 27 operates to move the cargo suction device 1 upward. After the goods suction device 1 is lifted to a proper position, the hydraulic cylinder II 24 and the module 27 stop moving. At this moment, I15, the module II 16 of drive module drive sucking disc group 18 and move forward until contacting the goods after, I15, the module II 16 stop motion of module, control air compressor machine 102, centrifugal fan 103 this moment and make sucking disc group 18 suck the goods. Then drive module I15, module II 16 backward retraction motion and drive sucking disc group 18 and goods and move backward together, drive hydraulic cylinder I23 this moment and drive lift slip table 25 further drive fork 31, goods layer board 32 upward movement to the suitable position of goods suction means 1 below. At this time, the suction cup set 18 is operated to stop sucking, so that the goods are placed on the goods pallet 32. At this moment, the hydraulic cylinder I23 is driven to enable the fork 31 and the cargo supporting plate 32 to be adjusted downwards, and the placing position of the next cargo is reserved. Meanwhile, the driving module I15 and the driving module II 16 drive the sucker group 18 to move forwards continuously and suck goods, and the sucked goods are further placed on the goods supporting plate 32 after the position is adjusted. Repeating the above operation process until the cargo pallet 32 of the unloading trolley is fully loaded;

and S3, after the unloading trolley is fully loaded, the unloading trolley reaches the position near a preset net bag below the hatch, the hydraulic cylinder I23 is driven to further drive the fork 31 and the cargo supporting plate 32 to move to proper positions, the cargo supporting plate 32 is placed on the net bag, and the unloading trolley is driven to move backwards at the moment, so that the fork 31 is separated from the cargo supporting plate 32. At the moment, the unloading trolley returns to the operation area to continue to execute unloading operation;

s4, when the net bag is fully loaded, the net bag filled with goods is conveyed out of the cabin by using a crane to carry out unloading operation outside the cabin, and meanwhile, workers in the cabin place the net bag below the hatch again to cooperate with an unloading trolley to carry out unloading operation continuously;

s5, when the goods in the hold where the unloading trolley is located are not emptied, the unloading trolley is carried out according to the operation flow S2-S4 until the unloading is finished;

and S6, after the current cargo hold is cleaned, opening a next-layer cargo hold cabin door, and executing the unloading operation flows from S1 to S5 until the whole refrigerated ship is cleaned.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered as the technical solutions and the inventive concepts of the present invention within the technical scope of the present invention.

Claims (7)

1. A refrigerated vehicle discharge trolley characterized by comprising: the device comprises a cargo suction device (1), a lifting device (2), a tray device (3), a walking device (4) and a monitoring device (5); the bottom of elevating gear (2) is installed in the installation frame of running gear (4) front end, install tray device (3) on elevating gear (2) moving platform's the mount pad, install goods suction means (1) on elevating gear's (2) last platform mount pad, monitoring device (5) are installed on the mounting platform of goods suction means (1).

2. A refrigerator boat discharge trolley in accordance with claim 1 wherein: the goods suction device (1) comprises a frame base (11), a frame I (12), a frame II (13), a supporting frame (14), a module I (15), a module II (16), a supporting block (17), a sucker group (18), a mounting bracket (19), a motor (101), an air compressor (102) and a centrifugal fan (103); the cargo suction device is characterized in that the frame base (11) is fixedly installed on a lifting platform of the lifting device (2), the frame I (12) is fixedly installed on the side end face of the frame base (11), the modules I (15) are provided with two modules I and are respectively fixedly installed on the upper side end of the frame I (12), the frame II (13) is fixedly installed on a movable sliding block of the module I (15), the modules II (16) are provided with two modules II and are respectively fixedly installed on the upper side end of the frame II (13), the supporting blocks (17) are fixedly installed on the movable sliding blocks of the two modules II (16), the mounting support (19) is connected with the supporting blocks (17), the sucker group (18) is fixedly installed on the mounting support (19), the motor (101) is installed on the side end face of the supporting block (17), the output shaft of the motor is connected with the mounting support (19), the air compressor (102) and the centrifugal fan (103) are fixedly installed on a mounting base behind a driving cabin of the traveling device (4) and cooperate with each other to adjust the cargo suction device (1).

3. A refrigerator boat discharge trolley in accordance with claim 1 wherein: the lifting device (2) comprises a door frame I (21), a door frame II (22), an inner door frame I (211), an inner door frame II (221), a hydraulic cylinder I (23), a hydraulic cylinder II (24), a lifting sliding table (25), a guardrail (26) and a module (27); portal I (21) and portal II (22) fixed connection, interior portal I (211) nested install the inside slip track of portal I (21) and follow the inside slip track of portal I (21) reciprocates, interior portal II (221) nested install on the inside slip track of portal II (22) and follow the inside slip track of portal II (22) reciprocates, pneumatic cylinder I (23) bottom fixed mounting be in on the mounting platform of interior portal I (211) bottom, pneumatic cylinder II (24) bottom fixed mounting be in on the mounting platform of interior portal II (221) bottom, lift slip table (25) through chain, sprocket with the extension bar of pneumatic cylinder I (23) is connected, lift slip table (25) are in follow under pneumatic cylinder II (24) operation the inside guide rail of interior portal I (211) reciprocates, guardrail (26) are two to be installed respectively on the up end of interior portal II (221), the module (27) are two fixed mounting respectively and are in the outside of interior portal II (221) slides the module I (23) and then the interior portal I (23) operation drives the internal guide rail I (27) and move about the pneumatic cylinder I (221) moves, and drive the pneumatic cylinder I (23) and move up and down.

4. A refrigerator boat discharge trolley in accordance with claim 1 wherein: tray device (3) are including fork (31) and goods layer board (32), fork (31) are two fixed mounting in on the up end of lift slip table (25), goods layer board (32) can be dismantled with fork (31) and be connected.

5. A refrigerator boat discharge trolley in accordance with claim 1 wherein: running gear (4) are including walking chassis (41), cockpit (42), battery pack case (43), mount pad I (44) and mount pad II (45), cockpit (42) fixed mounting be in on the crossbeam frame of walking chassis (41), battery pack case (43) are installed in the mounting bracket of cockpit (42) lower tip, mount pad I (44) be two respectively with the mount pad of portal II (22) lower extreme is articulated, mount pad II (45) be two with portal II (22) lower extreme mount pad is connected, and when the pneumatic cylinder extension between portal II (22) and mount pad II (45), portal II (22) round the mount pad of mount pad I (44) rotates.

6. A refrigerator boat discharge trolley in accordance with claim 1 wherein: monitoring device (5) include mounting base (51), rotate platform (52) and high definition digtal camera (53), mounting base (51) are two and install respectively in the frame of sucking disc group (18) rear end face, rotate platform (52) and be two respectively fixed mounting in on mounting base (51), high definition digtal camera (53) are two and install respectively rotate on platform (52), rotate platform (52) and carry out 180 rotations around its self.

7. Process for unloading a refrigerated ship unloading trolley according to claims 1-6, comprising:

s1, after cargo at the hatch is cleaned, the unloading trolley is conveyed into the cabin from the hatch by a crane, and a plurality of cargo supporting plates (32) are prepared and piled on a deck in the cabin. The personnel in the cabin lay the tuck net which is put into the cabin in advance flat and place the tuck net at the position below the hatch for storing and transferring the goods delivered by the unloading trolley;

s2, after the unloading trolley is placed into the hold, the unloading trolley is driven to pick up a cargo supporting plate (32) placed into the hold onto a cargo fork (31), the unloading trolley is driven to enter a region to be unloaded and to be close to the region to be unloaded, a hydraulic cylinder II (24) is driven to extend to work at the moment, an inner door frame II (221) is driven to move upwards, a driving module (27) works to drive a cargo suction device (1) to move upwards, after the cargo suction device (1) rises to a proper position, the hydraulic cylinder II (24) and the module (27) stop moving, the driving module I (15) and the module II (16) drive a suction cup group (18) to move forwards until contacting with a cargo, the module I (15) and the module II (16) stop moving, an air compressor (102) is controlled at the moment, a centrifugal fan (103) enables the suction cup group (18) to suck the cargo, the driving module I (15) and the module II (16) retract backwards and drive the suction cup group (18) to move backwards together with the cargo, the cargo fork (31) drives a lifting hydraulic cylinder (23) to further drive a lifting sliding cylinder (25) to move to a proper position to adjust the cargo fork (31) and enable the cargo supporting plate (32) to move upwards, and the cargo fork (31) to stop moving, and the cargo fork (23), reserving a goods placing position, simultaneously driving the module I (15) and the module II (16) to drive the sucker group (18) to continuously move forwards and suck goods, placing the sucked goods on a goods supporting plate (32) after the position is adjusted, and repeating the operation process until the goods supporting plate (32) of the unloading trolley is fully loaded;

s3, when the unloading trolley is fully loaded, the unloading trolley reaches the position close to a net bag preset under a hatch, a hydraulic cylinder I (23) is driven to drive a fork (31) and a cargo supporting plate (32) to move to proper positions, the cargo supporting plate (32) is placed on the net bag, the unloading trolley is driven to move backwards at the moment, the fork (31) is separated from the cargo supporting plate (32), the unloading trolley returns to an operation area at the moment, and unloading operation is continuously executed;

s4, when the net bag is fully loaded, the net bag filled with goods is conveyed out of the cabin by using a crane to carry out unloading operation outside the cabin, and meanwhile, workers in the cabin place the net bag below the hatch again to cooperate with an unloading trolley to carry out unloading operation continuously;

s5, when the goods in the hold where the unloading trolley is located are not emptied, the unloading trolley is carried out according to the operation flow S2-S4 until the unloading is finished;

and S6, after the current cargo hold is cleaned, opening a next-layer cargo hold cabin door, and executing the unloading operation flows from S1 to S5 until the whole refrigerated ship is cleaned.

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