Portable ladder, system and method for pulp ship crew access to cargo holds

Abstract

The present application relates to the technical field of paper pulp ship, and discloses a portable ladder, a system and a method for paper pulp ship crew to enter and exit a cargo hold. The portable ladder comprises a hooking section, an extending section, a positioning assembly and a hooking assembly. The hooking section extends along a first direction, which is the length direction of the portable ladder. The extending section is arranged on the hooking section and extends along the first direction. The extending section can slide relative to the hooking section along the first direction, so that the length of the portable ladder is adjustable. The positioning assembly is used to fix the relative position of the extending section and the hooking section. The hooking assembly comprises a hook, which is fixedly arranged on the top of the hooking section. Two hooking assemblies are arranged at intervals along a second direction, which is the width direction of the portable ladder. The portable ladder, the system and the method for paper pulp ship crew to enter and exit a cargo hold are convenient for personnel to enter and exit the cargo hold of the paper pulp ship.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of pulp ships, in particular to a portable ladder and a system and method for crew to enter and exit a cargo hold of a pulp ship. BACKGROUND

[0002] Internationally, the transportation of pulp mainly relies on professional pulp transport ships. The transported pulp is usually dry pulp and has a block shape. Each block weighs 200-250 kg, and 4-8 blocks are stacked together and then lifted as a whole from the cargo hold to the wharf by a professional lifting tool. Due to the regularity of the shape of the pulp, the cargo hold of the pulp transport ship has straight walls on four sides, and the wall panels have no protrusions, which is different from the cargo hold of ordinary bulk carriers and container ships. The cargo hold of the pulp transport ship is also designed to have an access passage according to the specification requirements. The access passage is composed of a straight ladder or an inclined ladder. The access passage is generally designed on the outer side of the two ends of the cargo hold. The top of the access passage is connected to the deck through a small hatch cover. Steel doors are designed on the walls at both ends of the access passage into the cargo hold. The crew enters the cargo hold for work after opening the steel doors after entering the access passage through the small hatch cover. The position of the steel door is generally matched with the structure of the cargo hold. The outer side structure of the two ends of the cargo hold generally has multiple platform plates, and the position of the steel door is designed in combination with the position of the platform plates. Due to the particularity of the pulp, the number of layers of the loaded pulp may be different, which may cause the height position of the steel door to not be well matched with the height of the pulp. The opening position of the steel door at a higher position is too far from the top of the pulp, and the opening position of the steel door at a lower position is blocked by the pulp, which causes the problem that it is difficult for personnel to enter and exit the cargo hold of the pulp ship.

[0003] Therefore, there is an urgent need for a portable ladder and a system and method for crew to enter and exit a cargo hold of a pulp ship to solve the above problems. SUMMARY

[0004] The purpose of the present application is to provide a portable ladder and a system and method for crew to enter and exit a cargo hold of a pulp ship to facilitate personnel to enter and exit the cargo hold of the pulp ship.

[0005] To achieve this purpose, the present application adopts the following technical solutions:

[0006] A portable ladder comprises:

[0007] A hooking section extending in a first direction, the first direction being the length direction of the portable ladder;

[0008] A telescopic section arranged on the hooking section and extending in the first direction, the telescopic section being capable of sliding relative to the hooking section in the first direction so that the length of the portable ladder is adjustable;

[0009] A positioning assembly for fixing the relative position of the telescopic section and the hooking section;

[0010] The hooking assembly comprises a hook fixedly arranged at the top of the hooking section, and two hooking assemblies are arranged in a second direction, which is the width direction of the portable ladder.

[0011] As an improvement of the above technical solution, the hooking section comprises two first support rods extending in the first direction and a plurality of first steps extending in the second direction, the two first support rods are arranged in the second direction, the top end of each of the two first support rods is fixedly provided with the hooking assembly, and the two ends of each of the first steps are connected to the two first support rods, and the plurality of first steps are arranged in the first direction.

[0012] The telescopic section comprises two second support rods extending in the first direction and a plurality of second steps extending in the second direction, the two second support rods are arranged in the second direction, the second support rods are arranged in one-to-one correspondence with the first support rods, the two ends of each of the second steps are connected to the two second support rods, and the plurality of second steps are arranged in the first direction.

[0013] As an improvement of the above technical solution, the hooking section further comprises a first sliding rail, the first sliding rail is arranged on each of the two first support rods, and the two second support rods are slidingly arranged on the first sliding rails of the corresponding first support rods.

[0014] The telescopic section further comprises a second sliding rail, the second sliding rail is arranged on each of the second support rods, and the two first support rods are slidingly arranged on the second sliding rails of the corresponding second support rods.

[0015] The first sliding rail and the second sliding rail are provided with the positioning assembly.

[0016] As an improvement of the above technical solution, the first end of the first sliding rail is fixedly arranged on the first support rod of the hooking section, the second end extends towards the telescopic section, the second end of the first sliding rail is provided with a first guide groove extending in the first direction, and the second support rod is arranged in the first guide groove.

[0017] The first end of the second sliding rail is fixedly arranged on the second support rod of the telescopic section, the second end extends towards the hooking section, the second end of the second sliding rail is provided with a second guide groove extending in the first direction, and the first support rod is arranged in the second guide groove.

[0018] As an improvement of the above technical scheme, the positioning assembly comprises an abutting bolt, the second end of the first sliding rail is provided with a first threaded hole extending in a third direction, the second end of the second sliding rail is provided with a second threaded hole extending in the third direction, the abutting bolt arranged on the first sliding rail is inserted into the first threaded hole and threadedly connected with the first sliding rail, and can extend into the first guide groove and abut against the second supporting rod, the abutting bolt arranged on the second sliding rail is inserted into the second threaded hole and threadedly connected with the second sliding rail, and can extend into the second guide groove and abut against the first supporting rod, the abutting bolt arranged on the first sliding rail is located on the side of the second supporting rod away from the first supporting rod, and the abutting bolt arranged on the second sliding rail is located on the side of the first supporting rod away from the second supporting rod.

[0019] As an improvement of the above technical scheme, the positioning assembly further comprises a locking bolt, the first sliding rail is provided with a first communication hole extending in the second direction, the second supporting rod is provided with a first connecting hole extending in the second direction, the locking bolt arranged on the first sliding rail is inserted into the first communication hole and can be inserted into the first connecting hole to connect the first sliding rail and the second supporting rod, the second sliding rail is provided with a second communication hole extending in the second direction, the first supporting rod is provided with a second connecting hole extending in the second direction, and the locking bolt arranged on the second sliding rail is inserted into the second communication hole and can be inserted into the second connecting hole to connect the second sliding rail and the first supporting rod.

[0020] As an improvement of the above technical scheme, the locking bolt comprises:

[0021] a head portion having a cross-sectional area greater than that of the first communication hole and the second communication hole;

[0022] a tail portion inserted into the first communication hole or the second communication hole;

[0023] a limiting portion arranged on the side wall of the tail portion, and a groove for the limiting portion to pass through is arranged on the hole wall of the first communication hole and the second communication hole.

[0024] As an improvement of the above technical scheme, further comprising a limiting plate, the limiting plate is arranged on the first supporting rod and the second supporting rod, the limiting plate on the first supporting rod is used to abut against the second sliding rail, and the limiting plate on the second supporting rod is used to abut against the first sliding rail.

[0025] A system for crew to enter and exit a cargo hold of a pulp carrier, comprising the portable ladder of any one of the above, further comprising:

[0026] a main deck located outside the cargo hold;

[0027] A first straight ladder, a hatch coaming is arranged on the top of the cargo hold, and the first straight ladder connects the upper part of the hatch coaming and the main deck;

[0028] A lower deck, which is arranged outside the cargo hold and below the main deck;

[0029] An inner bottom plate, which is arranged outside the cargo hold and below the lower deck, and the height of the inner bottom plate is not higher than the bottom of the cargo hold;

[0030] A second straight ladder, which is arranged outside the cargo hold, and the second straight ladder connects the main deck and the lower deck;

[0031] An inclined ladder passage, which is arranged outside the cargo hold, and the inclined ladder passage connects the lower deck and the inner bottom plate, the inclined ladder passage comprises a transfer platform and an inclined ladder, a plurality of transfer platforms are arranged at intervals along the height direction of the cargo hold, the inclined ladder is connected between any two adjacent transfer platforms, the inclined ladder is connected between the inner bottom plate and one of the transfer platforms close to the inner bottom plate, a plurality of entrances are arranged on the bulkhead of the cargo hold at intervals along the height direction of the cargo hold, the plurality of entrances comprise a first entrance at the bottom of the cargo hold and a plurality of second entrances above the first entrance, the transfer platforms are arranged below the corresponding second entrances one by one;

[0032] A hooking rod, a plurality of first accommodating grooves are arranged on the bulkhead of the cargo hold, the first accommodating grooves are arranged below the corresponding second entrances one by one, and a plurality of hooking rods are arranged in the first accommodating grooves, the hook can be hooked on the hooking rod;

[0033] A third straight ladder, a second accommodating groove extending along the height direction of the cargo hold is arranged on the top of the bulkhead of the cargo hold, the third straight ladder is arranged in the second accommodating groove, and the third straight ladder extends to the upper part of the hatch coaming.

[0034] A method for a pulp ship crew to enter and exit the cargo hold, the pulp ship crew enters and exits the cargo hold of the pulp ship by using the pulp ship crew cargo hold entering and exiting system.

[0035] Compared with the prior art, the pulp ship crew cargo hold entering and exiting system has the following beneficial effects:

[0036] The portable ladder, the system and the method for the crew to access the cargo hold of the pulp ship provided by the application are characterized in that a hooking assembly is arranged at the top of the hooking section of the portable ladder, the hooking assembly is used to hook the portable ladder to the access of the cargo hold, the length of the portable ladder is adjusted by sliding the telescopic section relative to the hooking section in the first direction, the crew can move the portable ladder in the pulp ship, the length of the portable ladder is fixed by the positioning assembly, and the length of the portable ladder is prevented from changing when the portable ladder is used. When the access of the higher position is too high from the top of the pulp and the access of the lower position is blocked by the pulp, the portable ladder is adjusted to the appropriate length, the length of the portable ladder is fixed by the positioning assembly, the portable ladder is hooked to the access of the cargo hold, and the bottom end of the portable ladder is supported on the pulp, so that the crew can access the cargo hold through the portable ladder. BRIEF DESCRIPTION OF DRAWINGS

[0037] Figure 1 is a side view of the portable ladder in the shortened state provided by the embodiment of the application;

[0038] Figure 2 is a front view of the portable ladder in the elongated state provided by the embodiment of the application;

[0039] Figure 3 is a side view of the portable ladder in the elongated state provided by the embodiment of the application;

[0040] Figure 4 is a sectional view of A-A in Figure 3

[0041] Figure 5 is a top view of part of the structure of the pulp ship;

[0042] Figure 6 is a side view of the outside of the cargo hold of the pulp ship;

[0043] Figure 7 is a schematic view of part of the structure of the inside and outside of the bulkhead of the cargo hold of the pulp ship.

[0044] In the drawings:

[0045] 1, hooking section; 11, first support rod; 12, first step; 13, first sliding rail;

[0046] 2, telescopic section; 21, second support rod; 22, second step; 23, second sliding rail;

[0047] 3, positioning assembly; 31, abutting bolt; 32, locking bolt; 321, head; 322, tail; 323, limiting part; 3231, rope passing hole;

[0048] 4, hooking assembly; 41, hook; 42, limiting stopper;

[0049] 5, limiting plate;​

[0050] 6, a bolster plate;

[0051] 10, a main deck; 20, a first straight ladder; 30, a lower deck; 40, an inner bottom plate; 50, a second straight ladder; 60, a sloping ladder passage; 601, a transfer platform; 602, a sloping ladder;

[0052] 70, a third straight ladder;

[0053] 100, a cargo hold; 1001, a hatch coaming; 1002, a first access; 1003, a second access. DETAILED DESCRIPTION

[0054] The specific embodiments of the present application will be further described in conjunction with the drawings and examples. The following examples are used to illustrate the present application, but are not intended to limit the scope of the present application.

[0055] In the description of the present application, unless specifically defined and limited otherwise, the terms "connected", "connected", "fixed" should be understood broadly, for example, it can be fixed connection, or detachable connection, or integrated; it can be mechanical connection, or electrical connection; it can be directly connected, or indirectly connected through intermediate medium, or the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0056] In the present application, unless specifically defined and limited otherwise, the first feature "on" or "under" the second feature can include that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, the first feature "on", "above" and "above" the second feature includes that the first feature is directly above and obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature "under", "below" and "below" the second feature includes that the first feature is directly below and obliquely below the second feature, or only indicates that the horizontal height of the first feature is less than that of the second feature.

[0057] In the description of the present embodiment, the terms "up", "down", "right", and other orientation or position relationship are based on the orientation or position relationship shown in the drawings, which is only for the convenience of description and simplification of operation, and does not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first", "second" are only used to distinguish in description, and have no special meaning.

[0058] As Figures 1-4As shown, the portable ladder of the embodiment of the present application comprises a hooking section 1, an extending section 2, a positioning assembly 3 and a hooking assembly 4. The hooking section 1 extends along a first direction, which is the length direction of the portable ladder. The extending section 2 is arranged on the hooking section 1 and extends along the first direction. The extending section 2 can slide relative to the hooking section 1 along the first direction, so that the length of the portable ladder is adjustable. The positioning assembly 3 is used to fix the relative position of the extending section 2 and the hooking section 1. The hooking assembly 4 comprises a hook 41, which is fixedly arranged on the top of the hooking section 1. Two hooking assemblies 4 are arranged along a second direction, which is the width direction of the portable ladder.

[0059] The portable ladder provided by the embodiment is provided with the hooking assembly 4 on the top of the hooking section 1. The hook 41 of the hooking assembly 4 can hook the portable ladder to the entrance of the cargo hold 100. The length of the portable ladder is adjustable by sliding the extending section 2 relative to the hooking section 1 along the first direction. The crew can easily carry the portable ladder in the pulp ship. The length of the portable ladder is fixed by the positioning assembly 3, so that the length of the portable ladder does not change when the portable ladder is used. When the entrance with a higher position is too high from the top of the pulp and the entrance with a lower position is blocked by the pulp, the portable ladder is adjusted to a proper length, and the length of the portable ladder is fixed by the positioning assembly 3. Then, the portable ladder is hooked to the entrance of the cargo hold 100. The bottom end of the portable ladder is supported on the pulp, so that the crew can enter or exit the cargo hold 100 through the portable ladder.

[0060] Optionally, as Figures 1-3As shown, the hooking section 1 comprises two first support rods 11 extending along a first direction and a plurality of first steps 12 extending along a second direction, the two first support rods 11 are spaced apart along the second direction, the top ends of the two first support rods 11 are fixedly provided with the hooking assemblies 4, the two ends of the first steps 12 are respectively connected to the two first support rods 11, and the plurality of first steps 12 are spaced apart along the first direction. The telescopic section 2 comprises two second support rods 21 extending along the first direction and a plurality of second steps 22 extending along the second direction, the two second support rods 21 are spaced apart along the second direction, the second support rods 21 are provided in one-to-one correspondence with the first support rods 11, the two ends of the second steps 22 are respectively connected to the two second support rods 21, and the plurality of second steps 22 are spaced apart along the first direction. In this embodiment, the portable ladder is of an aluminum alloy structure and is light in weight, which is convenient for the crew to carry in the cargo hold 100 passageway and can be fixedly stored in the deck storage room when not in use. Further, the hooking section 1 further comprises first sliding rails 13, the first sliding rails 13 are provided on the two first support rods 11, and the two second support rods 21 are slidingly provided on the first sliding rails 13 on the corresponding first support rods 11. The telescopic section 2 further comprises second sliding rails 23, the second sliding rails 23 are provided on the second support rods 21, and the two first support rods 11 are slidingly provided on the second sliding rails 23 on the corresponding second support rods 21. By slidingly connecting the first support rods 11 to the second sliding rails 23 and fixing the second sliding rails 23 on the telescopic section 2, and slidingly connecting the second support rods 21 to the first sliding rails 13 and fixing the first sliding rails 13 on the hooking section 1, the connection between the hooking section 1 and the telescopic section 2 is stable and firm. The first sliding rails 13 and the second sliding rails 23 are provided with the positioning assemblies 3, so as to improve the stability of the length positioning of the portable ladder.

[0061] Further, as shown in Figure 1 、 Figure 2 and Figure 4 , the first end of the first sliding rail 13 is fixedly provided on the first support rod 11 of the hooking section 1, the second end extends towards the telescopic section 2, the second end of the first sliding rail 13 is provided with a first guide groove extending along the first direction, and the second support rod 21 is provided in the first guide groove. The first end of the second sliding rail 23 is fixedly provided on the second support rod 21 of the telescopic section 2, the second end extends towards the hooking section 1, the second end of the second sliding rail 23 is provided with a second guide groove extending along the first direction, and the first support rod 11 is provided in the second guide groove.

[0062] Optionally, as shown in Figure 1 、 Figure 2 and Figure 4As shown, the positioning assembly 3 comprises abutting bolts 31, the second end of the first sliding rail 13 is provided with a first threaded hole extending in the third direction, the second end of the second sliding rail 23 is provided with a second threaded hole extending in the third direction, the abutting bolt 31 arranged on the first sliding rail 13 is inserted into the first threaded hole and is threadedly connected with the first sliding rail 13, and can extend into the first guide groove and abut against the second support rod 21, the abutting bolt 31 arranged on the second sliding rail 23 is inserted into the second threaded hole and is threadedly connected with the second sliding rail 23, and can extend into the second guide groove and abut against the first support rod 11, the abutting bolt 31 arranged on the first sliding rail 13 is located on the side of the second support rod 21 away from the first support rod 11, and the abutting bolt 31 arranged on the second sliding rail 23 is located on the side of the first support rod 11 away from the second support rod 21. That is to say, the side of the second support rod 21 away from the first support rod 11 and the side of the first support rod 11 away from the second support rod 21 are both provided with the abutting bolt 31, so that the personnel can preliminarily position the length of the portable ladder through the abutting bolt 31.

[0063] Further, as shown in Figure 1 , Figure 2 and Figure 4 , the positioning assembly 3 further comprises locking bolts 32, the first sliding rail 13 is provided with a first through hole extending in the second direction, the second support rod 21 is provided with a first connecting hole extending in the second direction, the locking bolt 32 arranged on the first sliding rail 13 is inserted into the first through hole and can be inserted into the first connecting hole to connect the first sliding rail 13 and the second support rod 21, the second sliding rail 23 is provided with a second through hole extending in the second direction, the first support rod 11 is provided with a second connecting hole extending in the second direction, the locking bolt 32 arranged on the second sliding rail 23 is inserted into the second through hole and can be inserted into the second connecting hole to connect the second sliding rail 23 and the first support rod 11. After the personnel preliminarily positions the length of the portable ladder through the abutting bolt 31, the locking bolt 32 can be inserted into the first through hole and the first connecting hole or the second through hole and the second connecting hole to further position the length of the portable ladder.

[0064] Further, as shown in Figure 4 , the locking bolt 32 comprises a head 321, a tail 322 and a limiting portion 323. The cross-sectional area of the head 321 is greater than that of the first through hole and the second through hole. The tail 322 is inserted into the first through hole or the second through hole. The limiting portion 323 is arranged on the side wall of the tail 322, and the hole wall of the first through hole and the second through hole is provided with a groove for the limiting portion 323 to pass through. With the arrangement of the limiting portion 323, the locking bolt 32 is not easy to come out after being inserted.

[0065] Further, the positioning assembly 3 further comprises a connecting rope, the locking bolt 32 passes through the rope passing hole 3231, one end of the connecting rope passes through the sound passing hole and is connected to the locking bolt 32, and the other end is fixedly connected to the first supporting rod 11 or the second supporting rod 21. When the positioning bolt is not used, the positioning bolt is connected to the first supporting rod 11 or the second supporting rod 21 through the connecting rope.

[0066] Optionally, as shown in Figure 1 and Figure 3 , the portable ladder further comprises a limiting plate 5, the limiting plate 5 is arranged on the first supporting rod 11 and the second supporting rod 21, the limiting plate 5 on the first supporting rod 11 is used to abut against the second sliding rail 23, and the limiting plate 5 on the second supporting rod 21 is used to abut against the first sliding rail 13. Through the abutment of the limiting plate 5 with the first sliding rail 13 and the second sliding rail 23, the hooking section 1 and the telescopic section 2 of the portable ladder are prevented from being separated from each other along the length direction of the portable ladder.

[0067] Optionally, as shown in Figure 1 and Figure 3 , the hooking assembly 4 further comprises a limiting stopper 42, one end of the limiting stopper 42 is rotationally connected to the hook 41, and the other end extends into the hook groove of the hook 41, the limiting stopper 42 has a first working position and a second working position, when the limiting stopper 42 is in the first working position, the limiting stopper 42 blocks the hook groove of the hook 41, when the limiting stopper 42 is in the second working position, the limiting stopper 42 leaves part of the hook groove, so that the hook 41 can be hooked on other objects, a return spring is connected between the limiting stopper 42 and the hook 41, and the return spring can drive the limiting stopper 42 to rotate from the second working position to the first working position. When the limiting stopper 42 is in the first working position, the limiting stopper 42 and the hook 41 surround to form a closed space, so that the hooked object is prevented from being separated from the hook groove.

[0068] The embodiment also provides a system for crew of a pulp ship to access a cargo hold, which comprises the portable ladder and further comprises a main deck 10, a first vertical ladder 20, a lower deck 30, an inner bottom plate 40, a second vertical ladder 50, an inclined ladder passage 60 and a hooking rod. The main deck 10 is located outside the cargo hold 100. The cargo hold 100 is provided with a hatch coaming 1001 at the top, and the first vertical ladder 20 is connected to the upper part of the hatch coaming 1001 and the main deck 10. The lower deck 30 is located outside the cargo hold 100 and below the main deck 10. The inner bottom plate 40 is located outside the cargo hold 100 and below the lower deck 30, and the inner bottom plate 40 is not higher than the bottom of the cargo hold 100. The second vertical ladder 50 is arranged outside the cargo hold 100, and the second vertical ladder 50 is connected to the main deck 10 and the lower deck 30. The main deck 10 is provided with a small hatch cover, and the top end of the second vertical ladder 50 is connected to the small hatch cover. The inclined ladder passage 60 is arranged outside the cargo hold 100, and the inclined ladder passage 60 is connected to the lower deck 30 and the inner bottom plate 40. The inclined ladder passage 60 comprises a transfer platform 601 and an inclined ladder 602. A plurality of transfer platforms 601 are arranged at intervals along the height direction of the cargo hold 100. An inclined ladder 602 is connected between any two adjacent transfer platforms 601. An inclined ladder 602 is connected between one of the plurality of transfer platforms 601 close to the inner bottom plate 40 and the inner bottom plate 40. A plurality of entrances are arranged at intervals along the height direction of the cargo hold 100 on the bulkhead of the cargo hold 100. The plurality of entrances comprise a first entrance 1002 at the bottom of the cargo hold 100 and a plurality of second entrances 1003 above the first entrance 1002. The transfer platforms 601 are arranged one by one corresponding to the second entrances 1003, and the transfer platforms 601 are arranged below the corresponding second entrances 1003. A plurality of first accommodating grooves are arranged on the bulkhead of the cargo hold 100. The first accommodating grooves are arranged one by one corresponding to the second entrances 1003, and the first accommodating grooves are arranged below the corresponding second entrances 1003. A plurality of hooking rods are arranged in the first accommodating grooves. The hooks 41 can be hooked on the hooking rods. The first accommodating grooves accommodate the hooking rods, so as to avoid the hooking rods from hindering the stacking of the pulp. The top of the bulkhead of the cargo hold 100 is provided with a second accommodating groove extending along the height direction of the cargo hold 100. A third vertical ladder 70 is arranged in the second accommodating groove. The third vertical ladder 70 extends to the upper part of the hatch coaming 1001. Although the third vertical ladder 70 is located in the cargo hold 100, the third vertical ladder 70 is not exposed to the second accommodating groove due to the second accommodating groove, so as to avoid the third vertical ladder 70 from hindering the stacking of the pulp.

[0069] The embodiment also provides a method for crew of a pulp ship to access a cargo hold 100 of the pulp ship, which uses the system for crew of a pulp ship to access a cargo hold.

[0070] When all the entrances are not blocked by the pulp, the personnel reaches the inner bottom plate 40 from the main deck 10 via the small hatch cover, the second straight ladder 50 and the ladder passage 60, and enters the cargo hold 100 via the first entrance 1002, or reaches the inner bottom plate 40 from the bottom of the cargo hold 100 via the first entrance 1002, and then reaches the main deck 10 via the ladder passage 60, the second straight ladder 50 and the small hatch cover to exit the cargo hold 100.

[0071] When the pulp blocks part of the entrances, and is above the pulp top surface, and the distance between the entrance closest to the pulp top surface and the pulp top surface does not exceed a set value, the personnel reaches the entrance closest to the pulp top surface from the main deck 10 via the small hatch cover, the second straight ladder 50 and the ladder passage 60, and enters the cargo hold 100 via the entrance, or reaches the ladder passage 60 from the pulp top via the entrance closest to the pulp top surface, and then reaches the main deck 10 via the ladder passage 60, the second straight ladder 50 and the small hatch cover to exit the cargo hold 100.

[0072] When the pulp blocks part of the entrances, and is above the pulp top surface, and the distance between the entrance closest to the pulp top surface and the pulp top surface exceeds a set value, the personnel reaches the entrance closest to the pulp top surface from the main deck 10 via the small hatch cover, the second straight ladder 50 and the ladder passage 60, takes out the portable ladder, adjusts and fixes the length of the portable ladder, hooks the portable ladder on the hooking rod below the entrance, and enters and exits the cargo hold 100 via the portable ladder.

[0073] When the pulp blocks all the entrances, the personnel reaches the top of the hatch coaming 1001 via the third straight ladder 70, and reaches the main deck 10 via the first straight ladder 20 to exit the cargo hold 100, or reaches the top of the hatch coaming 1001 from the main deck 10 via the first straight ladder 20, and reaches the pulp top via the third straight ladder 70 to enter the cargo hold 100.

[0074] In summary, the portable ladder, the system and the method for the crew of the pulp ship to enter and exit the cargo hold provided by the embodiment can safely solve the problem of the crew entering the cargo hold 100, and the scheme has strong adaptability and is widely applicable to ships loaded with pulp.

[0075] The above only describes the preferred embodiments of the present application, and it should be noted that those skilled in the art can make several improvements and replacements without departing from the technical principles of the present application, and these improvements and replacements should also be considered as the protection scope of the present application.

Claims

1. A portable ladder characterized in that, The utility model relates to a portable ladder, which comprises: a hooking section (1) extending along a first direction, the first direction being a length direction of the portable ladder; a telescopic section (2) arranged on the hooking section (1) and extending along the first direction, the telescopic section (2) being capable of sliding relative to the hooking section (1) along the first direction so that the length of the portable ladder is adjustable; a positioning assembly (3) for fixing the relative position of the telescopic section (2) and the hooking section (1); a hooking assembly (4) comprising a hook (41) fixedly arranged on the top of the hooking section (1), two hooking assemblies (4) being arranged at intervals along a second direction, the second direction being a width direction of the portable ladder; the hooking section (1) comprises two first support rods (11) extending along the first direction and a plurality of first steps (12) extending along the second direction, the two first support rods (11) being arranged at intervals along the second direction, the top end of each of the two first support rods (11) being fixedly provided with the hooking assembly (4), and the two ends of each of the plurality of first steps (12) being connected to the two first support rods (11), respectively, the plurality of first steps (12) being arranged at intervals along the first direction; the telescopic section (2) comprises two second support rods (21) extending along the first direction and a plurality of second steps (22) extending along the second direction, the two second support rods (21) being arranged at intervals along the second direction, the second support rods (21) being arranged in one-to-one correspondence with the first support rods (11), the two ends of each of the plurality of second steps (22) being connected to the two second support rods (21), respectively, and the plurality of second steps (22) being arranged at intervals along the first direction; the hooking section (1) further comprises a first sliding rail (13), the first sliding rail (13) being arranged on each of the two first support rods (11), and the two second support rods (21) being slidingly arranged on the first sliding rail (13) of the corresponding first support rod (11), respectively; the telescopic section (2) further comprises a second sliding rail (23), the second sliding rail (23) being arranged on each of the second support rods (21), and the two first support rods (11) being slidingly arranged on the second sliding rail (23) of the corresponding second support rod (21), respectively; the positioning assembly (3) is arranged on each of the first sliding rail (13) and the second sliding rail (23).

2. The portable ladder of claim 1, wherein, a first end of the first sliding rail (13) is fixedly arranged on the first support rod (11) of the hooking section (1), a second end of the first sliding rail (13) extends towards the telescopic section (2), the second end of the first sliding rail (13) is provided with a first guide groove extending along the first direction, and the second support rod (21) is arranged in the first guide groove. The first end of the second slide rail (23) is fixedly arranged on the second support rod (21) of the telescopic section (2), and the second end extends towards the direction close to the hooking section (1). The second end of the second slide rail (23) is provided with a second guide groove extending along the first direction. The first support rod (11) is arranged in the second guide groove.

3. The portable ladder of claim 2, wherein, The positioning assembly (3) comprises an abutting bolt (31). The second end of the first slide rail (13) is provided with a first threaded hole extending along a third direction. The second end of the second slide rail (23) is provided with a second threaded hole extending along the third direction. The abutting bolt (31) arranged on the first slide rail (13) is inserted into the first threaded hole and is threadedly connected with the first slide rail (13), and can extend into the first guide groove and abut against the second support rod (21). The abutting bolt (31) arranged on the second slide rail (23) is inserted into the second threaded hole and is threadedly connected with the second slide rail (23), and can extend into the second guide groove and abut against the first support rod (11). The abutting bolt (31) arranged on the first slide rail (13) is located on the side of the second support rod (21) away from the first support rod (11). The abutting bolt (31) arranged on the second slide rail (23) is located on the side of the first support rod (11) away from the second support rod (21).

4. The portable ladder of claim 3, wherein, The positioning assembly (3) further comprises a locking bolt (32). The first slide rail (13) is provided with a first communication hole extending along the second direction. The second support rod (21) is provided with a first connecting hole extending along the second direction. The locking bolt (32) arranged on the first slide rail (13) is inserted into the first communication hole, and can be inserted into the first connecting hole to connect the first slide rail (13) and the second support rod (21). The second slide rail (23) is provided with a second communication hole extending along the second direction. The first support rod (11) is provided with a second connecting hole extending along the second direction. The locking bolt (32) arranged on the second slide rail (23) is inserted into the second communication hole, and can be inserted into the second connecting hole to connect the second slide rail (23) and the first support rod (11).

5. The portable ladder of claim 4, wherein, The locking bolt (32) comprises: a head portion (321) having a cross-sectional area greater than that of the first communication hole and the second communication hole; a tail portion (322) inserted into the first communication hole or the second communication hole; a limiting portion (323) arranged on the side wall of the tail portion (322). The hole wall of the first communication hole and the second communication hole are both provided with a groove for the limiting portion (323) to pass through.

6. The portable ladder of claim 5, wherein, Further comprising a limiting plate (5). The first support rod (11) and the second support rod (21) are both provided with the limiting plate (5). The limiting plate (5) on the first support rod (11) is used to abut against the second slide rail (23). The limiting plate on the second support rod (21) is used to abut against the first slide rail (13).

7. A system for paper pulp vessel crew access to cargo holds, characterized in that The portable ladder of any one of claims 1-6, further comprising: a main deck (10) located outside the cargo hold (100); a first straight ladder (20) connected to an upper portion of a hatch coaming (1001) of the cargo hold (100) and the main deck (10); a lower deck (30) located outside the cargo hold (100) and below the main deck (10); an inner bottom plate (40) located outside the cargo hold (100) and below the lower deck (30), the inner bottom plate (40) being not higher than a bottom of the cargo hold (100); a second straight ladder (50) connected to the main deck (10) and the lower deck (30); a diagonal ladder passage (60) connected to the lower deck (30) and the inner bottom plate (40), the diagonal ladder passage (60) comprising a transfer platform (601) and a diagonal ladder (602), a plurality of the transfer platforms (601) being spaced apart along a height direction of the cargo hold (100), the adjacent two transfer platforms (601) being connected by the diagonal ladder (602), one of the plurality of the transfer platforms (601) being connected to the inner bottom plate (40) by the diagonal ladder (602), a plurality of exits being provided on a bulkhead of the cargo hold (100) and spaced apart along the height direction of the cargo hold (100), the plurality of exits comprising a first exit (1002) at the bottom of the cargo hold (100) and a plurality of second exits (1003) above the first exit (1002), the transfer platforms (601) being provided below the corresponding second exits (1003); a hooking rod, a plurality of first accommodating grooves being provided on the bulkhead of the cargo hold (100) and corresponding to the second exits (1003), the first accommodating grooves being provided below the corresponding second exits (1003), the hooking rods being provided in the first accommodating grooves, the hooks (41) being capable of being hooked on the hooking rods; a third straight ladder (70) provided in a second accommodating groove extending along the height direction of the cargo hold (100) on a top of the bulkhead of the cargo hold (100), the third straight ladder (70) extending to an upper portion of the hatch coaming (1001).

8. A method of allowing crew members of a pulp carrier to access a cargo hold, characterized in that The system for a crew of a pulp ship to access a cargo hold (100) of the pulp ship according to claim 7.

Images