Portable ladder and system and method for enabling crew of pulp ship to enter and exit cargo hold

Abstract

The invention relates to the technical field of pulp ships, and discloses a portable ladder and a system and method for pulp ship crew to enter and exit from a cargo hold. The portable ladder comprises a hooking section, a telescopic section, a positioning assembly and a hooking assembly. The hooking section extends in the first direction, and the first direction is the length direction of the portable ladder. The telescopic section is arranged on the hooking section, extends in the first direction and can slide relative to the hooking section in the first direction, so that the length of the portable ladder is adjustable. The positioning assembly is used for fixing the relative position of the telescopic section and the hooking section. The hooking assemblies comprise hooks, the hooks are fixedly arranged at the tops of the hooking sections, the two hooking assemblies are arranged in a spaced mode in the second direction, and the second direction is the width direction of the portable ladder. According to the portable ladder and the system and method for the pulp ship crew to enter and exit the cargo hold, the crew can enter and exit the pulp ship cargo hold conveniently.

Description

Technical Field

[0001] The invention relates to the technical field of pulp boats, and in particular to a portable ladder, a system and a method for crew members of a pulp boat to enter and exit a cargo hold. Background Art

[0002] Internationally, pulp transportation mainly relies on professional pulp transport ships. The transported pulp is usually dry pulp in block shape, with each block weighing 200-250kg. After 4-8 blocks are stacked together, they are hoisted from the cargo hold to the dock by professional hoists. Due to the regularity of the shape of pulp, the four sides of the cargo hold used to load pulp on the pulp transport ship are straight walls, and there are no protrusions on the wall panels, which is different from the cargo holds of ordinary bulk carriers and container ships. The cargo hold of the pulp transport ship is also designed with an in-and-out cargo hold passage according to the specifications. The cargo hold passage consists of a straight ladder or an inclined ladder. The cargo hold passage is generally designed on the outside of the two ends of the cargo hold. The top of the cargo hold passage is connected to the deck through a small hatch cover. Steel doors are designed on the walls of the cargo hold at both ends of the cargo hold passage. After the crew enters the cargo hold passage through the small hatch cover, they open the steel door and enter the cargo hold to work. The position of the steel door generally matches the structure of the cargo hold. The outer structure at both ends of the cargo hold generally has multiple layers of platform plates. The position of the steel door is designed in combination with the position of the platform plate. Due to the particularity of pulp and the different numbers of layers of loaded pulp, the height of the steel door may not match the height of the pulp well. There is a problem that the opening of the steel door at a higher position is too far from the top of the pulp, while the opening of the steel door at a lower position is blocked by the pulp, making it difficult for people to enter and exit the cargo hold of the pulp ship.

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

[0004] The object of the present invention is to provide a portable ladder, a system and a method for crew members of a pulp ship to enter and exit the cargo hold, so as to facilitate personnel to enter and exit the cargo hold of the pulp ship.

[0005] To achieve this object, the present invention adopts the following technical solutions:

[0006] A portable ladder comprising:

[0007] a hooking section extending along a first direction, wherein the first direction is a length direction of the portable ladder;

[0008] a telescopic section, which is disposed on the hook section and extends along the first direction, and the telescopic section can slide relative to the hook section along the first direction so that the length of the portable ladder can be adjusted;

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

[0010] The hook assembly comprises a hook, wherein the hook is fixedly arranged on the top of the hook section, and two hook assemblies are arranged at intervals along a second direction, and the second direction is the width direction of the portable ladder.

[0011] As an improvement of the above technical solution, the hooking section includes two first support rods extending along the first direction and a plurality of first steps extending along the second direction, the two first support rods are arranged at intervals along the second direction, the top ends of the two first support rods are fixedly provided with the hooking assembly, the two ends of the first step are respectively connected to the two first support rods, and the plurality of first steps are arranged at intervals along the first direction;

[0012] The telescopic section includes two second support rods extending along the first direction and a plurality of second steps extending along the second direction, the two second support rods are arranged at intervals along the second direction, the second support rods are arranged in a one-to-one correspondence with the first support rods, the two ends of the second step are respectively connected to the two second support rods, and the plurality of second steps are arranged at intervals along the first direction.

[0013] As an improvement of the above technical solution, the hooking section further includes a first slide rail, the two first support rods are both provided with the first slide rail, and the two second support rods are respectively slidably provided on the first slide rails on the corresponding first support rods;

[0014] The telescopic section further includes a second slide rail, each of the second support rods is provided with the second slide rail, and the two first support rods are respectively slidably provided on the second slide rails on the corresponding second support rods;

[0015] The positioning assembly is disposed on both the first slide rail and the second slide rail.

[0016] As an improvement of the above technical solution, the first end of the first slide rail is fixedly arranged on the first support rod of the hook section, and the second end extends in a direction close to the telescopic section. The second end of the first slide rail is provided with a first guide groove extending along the first direction, and the second support rod is arranged in the first guide groove.

[0017] The first end of the second slide rail is fixedly disposed on the second support rod of the telescopic section, and the second end extends toward the direction close to the hooking section. The second end of the first slide rail is provided with a second guide groove extending along the first direction, and the first support rod is disposed in the second guide groove.

[0018] As an improvement of the above technical solution, the positioning assembly includes an abutment bolt, the second end of the first slide rail is provided with a first threaded hole extending along a third direction, the second end of the second slide rail is provided with a second threaded hole extending along the third direction, the abutment bolt arranged on the first slide rail is inserted into the first threaded hole and threadedly connected to the first slide rail, and can extend into the first slide groove and abut against the second support rod, the abutment bolt arranged on the second slide rail is inserted into the second threaded hole and threadedly connected to the second slide rail, and can extend into the second slide groove and abut against the first support rod, the abutment bolt arranged on the first slide rail is located on a side of the second support rod away from the first support rod, and the abutment bolt arranged on the second slide rail is located on a side of the first support rod away from the second support rod.

[0019] As an improvement of the above technical solution, the positioning member also includes a locking pin, a first connecting hole extending along the second direction is provided on the first slide rail, a first connecting hole extending along the second direction is provided on the second support rod, the locking pin arranged on the first slide rail is inserted into the first connecting hole, and can be inserted into the first connecting hole to connect the first slide rail and the second support rod, a second connecting hole extending along the second direction is provided on the second slide rail, and a second connecting hole extending along the second direction is provided on the first support rod, the locking pin arranged on the second slide rail is inserted into the second connecting hole, and can be inserted into the second connecting hole to connect the second slide rail and the first support rod.

[0020] As an improvement of the above technical solution, the locking latch comprises:

[0021] A head portion, the cross-sectional area of ​​which is larger than the cross-sectional areas of the first communicating hole and the second communicating hole;

[0022] a tail portion, which is inserted into the first communicating hole or the second communicating hole;

[0023] A limiting portion is 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 connecting hole and the second connecting hole.

[0024] As an improvement of the above technical solution, it also includes a limit plate, which is provided on both the first support rod and the second support rod. The limit plate on the first support rod is used to abut against the second slide rail, and the limit plate on the second support rod is used to abut against the first slide rail.

[0025] A system for crew members of a pulp ship to enter and exit a cargo hold, comprising any of the portable ladders described above, and further comprising:

[0026] the main deck, which is outside the cargo holds;

[0027] A first straight ladder, wherein a hatch coaming is provided on the top of the cargo hold, and the first straight ladder connects an upper portion of the hatch coaming with the main deck;

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

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

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

[0031] An inclined ladder passage, which is arranged outside the cargo hold, the inclined ladder passage connects the lower deck and the inner bottom plate, the inclined ladder passage includes a transfer platform and an inclined ladder, a plurality of the transfer platforms are arranged at intervals along the height direction of the cargo hold, the inclined ladder is connected between two adjacent transfer platforms, the inclined ladder is connected between a transfer platform close to the inner bottom plate among the plurality of transfer platforms and the inner bottom plate, a plurality of entrances and exits arranged at intervals along the height direction of the cargo hold are arranged on the bulkhead of the cargo hold, the plurality of entrances and exits include a first entrance and exit located at the bottom of the cargo hold and a plurality of second entrances and exits located above the first entrance and exit, the transfer platform is arranged in a one-to-one correspondence with the second entrances and exits, and the transfer platform is arranged below the corresponding second entrances and exits;

[0032] A hook rod, wherein a plurality of first accommodating grooves are arranged on the bulkhead of the cargo hold, the first accommodating grooves are arranged in one-to-one correspondence with the second entrances and exits, the first accommodating grooves are arranged below the corresponding second entrances and exits, a plurality of the hook rods are arranged in the first accommodating grooves, and the hooks can be hooked on the hook rods;

[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 cargo hold bulkhead, 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 pulp ship crew members to enter and exit the cargo hold, using the system for pulp ship crew members to enter and exit the cargo hold.

[0035] Compared with the prior art, the present invention has the following beneficial effects:

[0036] The portable ladder and the system and method for the crew of a pulp ship to enter and exit the cargo hold of the present invention are as follows: a hook assembly is arranged on the top of the hook section of the portable ladder, and the portable ladder can be hooked at the entrance and exit of the cargo hold through the hook of the hook assembly; the length of the portable ladder is adjustable by sliding the telescopic section relative to the hook section along the first direction, so that the crew can carry the portable ladder to move in the pulp ship; the length of the portable ladder is fixed by the positioning assembly to avoid the length of the portable ladder changing when it is used. When the distance between the entrance and exit at a higher position and the top of the pulp is too high, and the entrance and exit at a lower position has been blocked by the pulp, the portable ladder is adjusted to a suitable length, and the length of the portable ladder is fixed by the positioning assembly, and then the portable ladder is hooked at the entrance and exit of the cargo hold, and the bottom end of the portable ladder is supported on the pulp, so that people can enter and exit the cargo hold through the portable ladder. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0038] Figure 2 is a front view of a portable ladder provided by an embodiment of the present invention in an extended state;

[0039] Figure 3 is a side view of a portable ladder provided by an embodiment of the present invention in an extended state;

[0040] Figure 4 yes Figure 3 Sectional view at AA in the middle;

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

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

[0043] Figure 7 It is a schematic diagram of part of the structure on both the inner and outer sides of the cargo hold bulkhead of a pulp ship.

[0044] In the figure:

[0045] 1. hooking section; 11. first support rod; 12. first step; 13. first slide rail; 131. first guide groove;

[0046] 2. telescopic section; 21. second support rod; 22. second step; 23. second slide rail;

[0047] 3. Positioning assembly; 31. Abutment bolt; 32. Locking pin; 321. Head; 322. Tail; 323. Limiting part; 3231. Rope threading hole;

[0048] 4. Hook assembly; 41. Hook; 42. Limit stopper;

[0049] 5. Limiting plate;

[0050] 6. Pad;

[0051] 10. Main deck; 20. First straight ladder; 30. Lower deck; 40. Inner bottom plate; 50. Second straight ladder; 60. Inclined ladder passage; 601. Transfer platform; 602. Inclined ladder;

[0052] 70. The third vertical ladder;

[0053] 100. Cargo hold; 1001. Hatch coaming; 1002. First entrance and exit; 1003. Second entrance and exit. DETAILED DESCRIPTION

[0054] The specific implementation of the present invention is further described in detail below in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0055] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0056] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0057] In the description of this embodiment, the terms "upper", "lower", "right" and other directions or positional relationships are based on the directions or positional relationships shown in the drawings, and are only for the convenience of description and simplified operation, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0058] like Figure 1-Figure 4As shown, a portable ladder according to an embodiment of the present invention comprises a hooking section 1, a telescopic 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 telescopic section 2 is arranged on the hooking section 1 and extends along the first direction, and the telescopic section 2 can slide relative to the hooking section 1 along the first direction so that the length of the portable ladder can be adjusted. The positioning assembly 3 is used to fix the relative position of the telescopic section 2 and the hooking section 1. The hooking assembly 4 comprises a hook 41, which is fixedly arranged at the top of the hooking section 1, and the two hooking assemblies 4 are arranged at intervals along a second direction, which is the width direction of the portable ladder.

[0059] The portable ladder provided in this embodiment has a hook assembly 4 disposed on the top of the hook section 1. The hook 41 of the hook assembly 4 enables the portable ladder to be hooked at the entrance and exit of the cargo hold 100. The telescopic section 2 slides relative to the hook section 1 along the first direction to make the length of the portable ladder adjustable, so that the crew can carry the portable ladder to move in the pulp ship. The length of the portable ladder is fixed by the positioning assembly 3 to prevent the length of the portable ladder from changing when it is used. When the entrance and exit at a higher position is too high from the top of the pulp, and the entrance and exit at a lower position has been blocked by the pulp, the portable ladder is adjusted to a suitable length, and the length of the portable ladder is fixed by the positioning assembly 3, and then it is hooked at the entrance and exit of the cargo hold 100, and the bottom end of the portable ladder is supported on the pulp, so that personnel can enter and exit the cargo hold 100 through the portable ladder.

[0060] Alternatively, if Figure 1-Figure 3As shown, the hooking section 1 includes 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 are arranged at intervals along the second direction, the tops of the two first support rods 11 are fixedly provided with hooking components 4, the two ends of the first step 12 are respectively connected to the two first support rods 11, and the plurality of first steps 12 are arranged at intervals along the first direction. The telescopic section 2 includes 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 arranged at intervals along the second direction, the second support rods 21 are arranged one-to-one with the first support rods 11, the two ends of the second step 22 are respectively connected to the two second support rods 21, and the plurality of second steps 22 are arranged at intervals along the first direction. In this embodiment, the portable ladder is an aluminum alloy structure with a light weight, which is convenient for the crew to carry in the cargo hold 100 channel, and can be fixedly stored in the deck storage room when not in use. Furthermore, the hooking section 1 also includes a first slide rail 13, and the two first support rods 11 are each provided with the first slide rail 13, and the two second support rods 21 are respectively slidably provided on the first slide rail 13 on the corresponding first support rod 11. The telescopic section 2 also includes a second slide rail 23, and the second support rod 21 is each provided with the second slide rail 23, and the two first support rods 11 are respectively slidably provided on the second slide rail 23 on the corresponding second support rod 21. By slidingly connecting the first support rod 11 to the second slide rail 23, the second slide rail 23 is fixed to the telescopic section 2, and slidingly connecting the second support rod 21 to the first slide rail 13, the first slide rail 13 is fixed to the hooking section 1, so that the connection between the hooking section 1 and the telescopic section 2 is stable and firm. Positioning components 3 are provided on the first slide rail 13 and the second slide rail 23 to improve the stability of the length positioning of the portable ladder.

[0061] Furthermore, if Figure 1 , Figure 2 and Figure 4 As shown, the first end of the first slide rail 13 is fixedly arranged on the first support rod 11 of the hooking section 1, and the second end extends in the direction close to the telescopic section 2. The second end of the first slide rail 13 is provided with a first guide groove 131 extending along the first direction, and the second support rod 21 is arranged in the first guide groove 131. 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 in the direction close to the hooking section 1. The second end of the first slide rail 13 is provided with a second guide groove extending along the first direction, and the first support rod 11 is arranged in the second guide groove.

[0062] Alternatively, if Figure 1 , Figure 2 and Figure 4As shown, the positioning assembly 3 includes an abutment bolt 31, a first threaded hole extending along a third direction is provided at the second end of the first slide rail 13, and a second threaded hole extending along the third direction is provided at the second end of the second slide rail 23. The abutment bolt 31 arranged on the first slide rail 13 is inserted into the first threaded hole and threadedly connected to the first slide rail 13, and can extend into the first slide groove and abut against the second support rod 21. The abutment bolt 31 arranged on the second slide rail 23 is inserted into the second threaded hole and threadedly connected to the second slide rail 23, and can extend into the second slide groove and abut against the first support rod 11. The abutment bolt 31 arranged on the first slide rail 13 is located on a side of the second support rod 21 away from the first support rod 11, and the abutment bolt 31 arranged on the second slide rail 23 is located on a side of the first support rod 11 away from the second support rod 21. That is, 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 abutment bolts 31, so that personnel can perform preliminary length positioning of the portable ladder through the abutment bolts 31.

[0063] Furthermore, if Figure 1 , Figure 2 and Figure 4 As shown, the positioning assembly 3 further includes a locking latch 32, a first connecting hole extending in the second direction is provided on the first slide rail 13, a first connecting hole extending in the second direction is provided on the second support rod 21, the locking latch 32 provided on the first slide rail 13 is inserted into the first connecting hole, and can be inserted into the first connecting hole to connect the first slide rail 13 and the second support rod 21, a second connecting hole extending in the second direction is provided on the second slide rail 23, a second connecting hole extending in the second direction is provided on the first support rod 11, the locking latch 32 provided on the second slide rail 23 is inserted into the second connecting hole, and can be inserted into the second connecting hole to connect the second slide rail 23 and the first support rod 11. After the personnel perform preliminary length positioning of the portable ladder by the abutment bolt 31, the locking latch 32 can be inserted into the first connecting hole and the first connecting hole, or into the second connecting hole and the second connecting hole to further position the length of the portable ladder.

[0064] Furthermore, if Figure 4 As shown, the locking latch 32 includes a head 321, a tail 322 and a limiting portion 323. The cross-sectional area of ​​the head 321 is larger than the cross-sectional area of ​​the first communicating hole and the second communicating hole. The tail 322 is inserted into the first communicating hole or the second communicating hole. The limiting portion 323 is arranged on the side wall of the tail 322, and the hole walls of the first communicating hole and the second communicating hole are both provided with a groove for the limiting portion 323 to pass through. The setting of the limiting portion 323 makes it difficult for the locking latch 32 to fall out after being inserted.

[0065] Furthermore, the positioning assembly 3 also includes a connecting rope, a locking pin 32 through a rope hole 3231, one end of the connecting rope passes through the sound hole and is connected to the locking pin 32, and the other end is fixedly connected to the first support rod 11 or the second support rod 21. When the positioning pin is not in use, the positioning pin is connected to the first support rod 11 or the second support rod 21 through the connecting rope.

[0066] Alternatively, if Figure 1 and Figure 3 As shown, the portable ladder further includes a limit plate 5, and the limit plates 5 are both provided on the first support rod 11 and the second support rod 21. The limit plate 5 on the first support rod 11 is used to abut against the second slide rail 23, and the limit plate 5 on the second support rod 21 is used to abut against the first slide rail 13. The abutment of the limit plate 5 with the first slide rail 13 and the second slide rail 23 prevents the hook section 1 and the telescopic section 2 of the portable ladder from being separated from each other along the length direction of the portable ladder.

[0067] Alternatively, if Figure 1 and Figure 3 As shown, the hook assembly 4 also includes a limit stopper 42, one end of which is rotatably connected to the hook 41, and the other end extends into the hook groove of the hook 41. The limit stopper 42 has a first working position and a second working position. When the limit stopper 42 is in the first working position, the limit stopper 42 blocks the hook groove of the hook 41. When the limit stopper 42 is in the second working position, the limit stopper 42 opens part of the hook groove so that the hook 41 can be hooked on other objects. A return spring is connected between the limit stopper 42 and the hook 41, and the return spring can drive the limit stopper 42 to rotate from the second working position to the first working position. When the limit stopper 42 is in the first working position, the limit stopper 42 and the hook 41 are surrounded to form a closed space to prevent the hooked object from falling out of the hook groove.

[0068] The present embodiment also provides a system for crew members of a pulp ship to enter and exit the cargo hold, comprising the above-mentioned portable ladder, and also comprising a main deck 10, a first straight ladder 20, a lower deck 30, an inner bottom plate 40, a second straight ladder 50, an inclined ladder passage 60 and a hook rod. The main deck 10 is located outside the cargo hold 100. A hatch coaming 1001 is provided on the top of the cargo hold 100, and the first straight ladder 20 connects the upper part of the hatch coaming 1001 with 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 straight ladder 50 is provided outside the cargo hold 100, and the second straight ladder 50 connects the main deck 10 and the lower deck 30. A small hatch cover is provided on the main deck 10, and the top end of the second straight 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 connects the lower deck 30 and the inner bottom plate 40. The inclined ladder passage 60 includes a transfer platform 601 and an inclined ladder 602. Multiple transfer platforms 601 are arranged at intervals along the height direction of the cargo hold 100, and the inclined ladder 602 is connected between two adjacent transfer platforms 601. A transfer platform 601 close to the inner bottom plate 40 among the multiple transfer platforms 601 is connected to the inner bottom plate 40 with the inclined ladder 602. Multiple entrances and exits arranged at intervals along the height direction of the cargo hold 100 are arranged on the bulkhead of the cargo hold 100, and the multiple entrances and exits include a first entrance and exit 1002 located at the bottom of the cargo hold 100 and multiple second entrances and exits 1003 located above the first entrance and exit 1002. The transfer platform 601 and the second entrance and exit 1003 are arranged in a one-to-one correspondence, and the transfer platform 601 is arranged below the corresponding second entrance and exit 1003. A plurality of first accommodating grooves are arranged on the bulkhead of the cargo hold 100. The first accommodating grooves are arranged one-to-one with the second entrance and exit 1003. The first accommodating grooves are arranged below the corresponding second entrance and exit 1003. A plurality of hooking rods are arranged in the first accommodating grooves. The hooks 41 can be hooked on the hooking rods. The hooking rods are accommodated by the first accommodating grooves to avoid the hooking rods hindering the stacking of pulp. A second accommodating groove extending along the height direction of the cargo hold 100 is arranged on the top of the bulkhead of the cargo hold 100. The third straight ladder 70 is arranged in the second accommodating groove. The third straight ladder 70 extends to the upper part of the hatch coaming 1001. Although the third straight ladder 70 is located in the cargo hold 100, due to the effect of the second accommodating groove, the third straight ladder 70 is not exposed to the second accommodating groove, thereby avoiding the third straight ladder 70 hindering the stacking of pulp.

[0069] This embodiment also provides a method for pulp ship crew members to enter and exit the cargo hold, using the above-mentioned system for pulp ship crew members to enter and exit the cargo hold 100 of the pulp ship, including:

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

[0071] When the pulp blocks part of the entrance and exit and is located above the top surface of the pulp, and the distance between the entrance and exit closest to the top surface of the pulp and the top surface of the pulp does not exceed the set value, personnel go from the main deck 10 through the small hatch cover, the second straight ladder 50, and the inclined ladder passage 60 to the entrance and exit located above the top surface of the pulp and closest to the top surface of the pulp, and enter the cargo hold 100 through the entrance and exit, or go from the top of the pulp through the entrance and exit located above the top surface of the pulp and closest to the top surface of the pulp to the inclined ladder passage 60, and then reach the main deck 10 through the inclined ladder passage 60, the second straight ladder 50, and the small hatch cover to leave the cargo hold 100.

[0072] When the pulp blocks part of the entrance and exit and is located above the top surface of the pulp, and the distance between the entrance and exit closest to the top surface of the pulp and the top surface of the pulp exceeds the set value, the personnel carry a portable ladder from the main deck 10 through the small hatch cover, the second straight ladder 50, and the inclined ladder passage 60 to reach an entrance and exit located above the top surface of the pulp and closest to the top surface of the pulp, take out the portable ladder, adjust and fix the length of the portable ladder, hook the portable ladder on the hook rod under the entrance and exit, and enter and exit the cargo hold 100 through the portable ladder.

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

[0074] In summary, the portable ladder, system and method for pulp ship crew members to enter and exit the cargo hold provided in this embodiment can safely solve the problem of crew members entering the cargo hold 100. The solution has strong adaptability and is widely applicable to ships carrying pulp.

[0075] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and substitutions can be made without departing from the technical principles of the present invention. These improvements and substitutions should also be regarded as the scope of protection of the present invention.

Claims

1. A portable ladder, characterized in that: include: A hooking section (1) extending along a first direction, wherein the first direction is the length direction of the portable ladder; a telescopic section (2) which is arranged on the hook section (1) and extends along the first direction, and the telescopic section (2) can slide relative to the hook section (1) along the first direction so that the length of the portable ladder can be adjusted; A positioning assembly (3) for fixing the relative position of the telescopic section (2) and the hooking section (1); A hook assembly (4) comprises a hook (41), wherein the hook (41) is fixedly arranged on the top of the hook section (1), and two hook assemblies (4) are arranged at intervals along a second direction, wherein the second direction is the width direction of the portable ladder.

2. The portable ladder according to claim 1, characterized in that: 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) are arranged at intervals along the second direction, the top ends of the two first support rods (11) are fixedly provided with the hooking assembly (4), the two ends of the first step (12) are respectively connected to the two first support rods (11), and the plurality of first steps (12) are 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) are arranged at intervals along the second direction, the second support rods (21) are arranged in a one-to-one correspondence with the first support rods (11), the two ends of the second step (22) are respectively connected to the two second support rods (21), and the plurality of second steps (22) are arranged at intervals along the first direction.

3. The portable ladder according to claim 2, characterized in that: The hook section (1) further comprises a first slide rail (13), the two first support rods (11) are both provided with the first slide rail (13), and the two second support rods (21) are respectively slidably provided on the first slide rails (13) on the corresponding first support rods (11); The telescopic section (2) further comprises a second slide rail (23), each of the second support rods (21) is provided with the second slide rail (23), and the two first support rods (11) are respectively slidably arranged on the second slide rails (23) on the corresponding second support rods (21); The positioning assembly (3) is provided on both the first slide rail (13) and the second slide rail (23).

4. The portable ladder according to claim 3, characterized in that: The first end of the first slide rail (13) is fixedly arranged on the first support rod (11) of the hook section (1), and the second end extends in a direction close to the telescopic section (2); the second end of the first slide rail (13) is provided with a first guide groove (131) extending along the first direction, and the second support rod (21) is arranged in the first guide groove (131); 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 in a direction close to the hook section (1). The second end of the first slide rail (13) is provided with a second guide groove extending along the first direction, and the first support rod (11) is arranged in the second guide groove.

5. The portable ladder according to claim 4, characterized in that: The positioning assembly (3) includes an abutment 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 abutment bolt (31) arranged on the first slide rail (13) is inserted into the first threaded hole and is threadedly connected to the first slide rail (13), and can extend into the first slide groove to abut against the second support rod (21), the abutment bolt (31) arranged on the second slide rail (23) is inserted into the second threaded hole and is threadedly connected to the second slide rail (23), and can extend into the second slide groove to abut against the first support rod (11), the abutment bolt (31) arranged on the first slide rail (13) is located on a side of the second support rod (21) away from the first support rod (11), and the abutment bolt (31) arranged on the second slide rail (23) is located on a side of the first support rod (11) away from the second support rod (21).

6. The portable ladder according to claim 5, characterized in that: The positioning member also includes a locking pin (32); a first connecting hole extending along the second direction is provided on the first slide rail (13); a first connecting hole extending along the second direction is provided on the second support rod (21); the locking pin (32) provided on the first slide rail (13) is inserted into the first connecting hole and can be inserted into the first connecting hole to connect the first slide rail (13) and the second support rod (21); a second connecting hole extending along the second direction is provided on the second slide rail (23); a second connecting hole extending along the second direction is provided on the first support rod (11); the locking pin (32) provided on the second slide rail (23) is inserted into the second connecting hole and can be inserted into the second connecting hole to connect the second slide rail (23) and the first support rod (11).

7. The portable ladder according to claim 6, characterized in that: The locking latch (32) comprises: A head portion (321) having a cross-sectional area greater than the cross-sectional areas of the first communicating hole and the second communicating hole; a tail portion (322) inserted into the first communicating hole or the second communicating hole; A limiting portion (323) is arranged on the side wall of the tail portion (322), and a groove for the limiting portion (323) to pass through is arranged on the hole walls of the first connecting hole and the second connecting hole.

8. The portable ladder according to claim 7, characterized in that: It also includes a limit plate (5), which is arranged on the first support rod (11) and the second support rod (21), the limit plate (5) on the first support rod (11) is used to abut against the second slide rail (23), and the limit plate on the second support rod (21) is used to abut against the first slide rail (13).

9. A system for crew members of a pulp ship to enter and exit the cargo hold, characterized in that: The portable ladder according to any one of claims 1 to 8 further comprises: a main deck (10) located outside the cargo hold (100); a first straight ladder (20), wherein a hatch coaming (1001) is disposed on the top of the cargo hold (100), and the first straight ladder (20) connects the upper part of the hatch coaming (1001) with 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), wherein the inner bottom plate (40) is not higher than the bottom of the cargo hold (100); a second vertical ladder (50) disposed outside the cargo hold (100), wherein the second vertical ladder (50) connects the main deck (10) and the lower deck (30); An inclined ladder passage (60) is arranged outside the cargo hold (100), the inclined ladder passage (60) connects the lower deck (30) and the inner bottom plate (40), the inclined ladder passage (60) includes a transfer platform (601) and an inclined ladder (602), a plurality of the transfer platforms (601) are arranged at intervals along the height direction of the cargo hold (100), the inclined ladder (602) is connected between two adjacent transfer platforms (601), and a transfer platform (601) close to the inner bottom plate (40) among the plurality of transfer platforms (601) is connected to the inner bottom plate (40) is connected with the inclined ladder (602), the bulkhead of the cargo hold (100) is provided with a plurality of entrances and exits spaced apart along the height direction of the cargo hold (100), the plurality of entrances and exits include a first entrance and exit (1002) located at the bottom of the cargo hold (100) and a plurality of second entrances and exits (1003) located above the first entrance and exit (1002), the transfer platform (601) is provided in one-to-one correspondence with the second entrances and exits (1003), and the transfer platform (601) is provided below the corresponding second entrance and exit (1003); A hook rod, wherein a plurality of first accommodating grooves are arranged on the bulkhead of the cargo hold (100), the first accommodating grooves are arranged in one-to-one correspondence with the second entrances and exits (1003), the first accommodating grooves are arranged below the corresponding second entrances and exits (1003), a plurality of the hook rods are arranged in the first accommodating grooves, and the hooks (41) can be hooked on the hook rods; A third straight ladder (70), a second accommodating groove extending along the height direction of the cargo hold (100) is provided on the top of the cargo hold (100) bulkhead, the third straight ladder (70) is arranged in the second accommodating groove, and the third straight ladder (70) extends to the upper part of the hatch coaming (1001).

10. A method for pulp ship crew members to enter and exit the cargo hold, characterized in that: The system for entering and exiting the cargo hold of a pulp ship as claimed in claim 9 is used for entering and exiting the cargo hold of the pulp ship.

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