CN115158557A - A lifting platform that can be lifted off and a design method of the same - Google Patents

Abstract

The invention relates to a hoisting and detachable heightening platform and a design method of the heightening platform, wherein the heightening platform comprises a lower platform structure, an upper platform structure and a guide rail, and the lower platform structure and the upper platform structure are provided with lifting eye rings; Both the structure and the upper platform structure are provided with guide grooves, which are respectively sleeved on the guide rails through the guide grooves. The lower platform structure and the upper platform structure are provided with guide rail connectors for locking the guide rails; the upper platform structure passes through the platform connector. Removably fixed above the lower platform structure; both the lower platform structure and the upper platform structure include thin platform plates, T-shaped beams, reinforcing ribs and diagonal support ribs, and the T-shaped beams are crisscrossed at the bottom of the thin platform plate to form a square hollow frame, which strengthens the The ribs are distributed at the bottom of the thin platform slab, and the diagonal support ribs are installed on the T-beam webs around the square hollow frame. The invention improves the loading and unloading efficiency, can flexibly adjust the height of the heightened platform, solves the problems of pulp burning and installation difficulty of the heightened platform, and is light and safe.

Description

A lifting platform that can be lifted off and a design method of the same

technical field

The invention relates to the technical field of ships, in particular to a liftable heightened platform and a design method of the heightened platform.

Background technique

The height of the water tank boss in the 1st cabin of the 62,000-ton pulp ship is 3.3m. With the different heights of pulp bales from different manufacturers, the difference in the height of pulp stacking is caused at the water tank boss. For example: the height of the first layer of Uruguay PP port pulp is 1.74m, and the superposition of two layers of Uruguay PP port pulp can satisfy the height of the pulp bale and the height of the water tank boss, so as to facilitate the stowage of the pulp bale behind. Judging from the pulp loading situation, the height of the first layer of goods is about 2m. After the two layers are loaded, the height of the surrounding pulp bales is quite different from the height of the water tank boss, so that the third layer of goods will appear uneven when loading. It satisfies the normal operation of the whole hoisting of pulp bales, which greatly affects the loading speed and cargo stacking, which is easy to cause damage to the pulp bales. In the process of hoisting the third layer of cargo, the steel wires and hooks of the lifting beam will directly contact the bulkhead. Increases the risk of wire breakage during loading and unloading.

Therefore, according to the cargo size of the voyage task, a heightened platform can be arranged on the water tank boss in advance to realize the heightened water tank boss, so that in the process of pulp packaging and unloading, each layer of pulp bale can be kept horizontal as a whole, but the existing heightened platform There are the following shortcomings: 1. The height of the existing heightening platform is fixed, which can only meet the loading requirements of a single pulp bale size, and the height cannot be flexibly adjusted according to the actual pulp bale size; 2. The existing heightening platform needs to be heated before the platform can be adjusted For fixing, and the pulp bales are flammable, the hot fixing operation is likely to cause the burning of the pulp bales, which increases the difficulty of installation. Therefore, the existing heightening platform cannot effectively solve the problems of hot and fixed, and the current The heightened platform is fully welded and fixed on the bulkhead and the water tank boss, which increases the construction time, the installation efficiency is low, and when the heightened platform needs to be disassembled, it is very difficult to disassemble; 3. Most of the existing heightened platforms are boxes, although they meet the Structural strength requirements, but its own weight is too heavy, which increases the difficulty of hoisting, and also affects the load-bearing of the bottom water tank boss, thus increasing unnecessary work risks.

SUMMARY OF THE INVENTION

In view of the problems existing in the prior art, the present invention proposes a liftable platform and a design method for the platform, so that the pulp package can be kept level during the pulp packing and unloading process, and the loading and unloading efficiency can be improved; Platform height requirements; solve the problems of difficult installation, low installation efficiency and pulp bales burning; realize the lightness and safety of the heightened platform.

The technical scheme of the present invention is realized as follows:

A liftable platform that can be lifted off includes a lower platform structure, an upper platform structure and guide rails fixed on a bulkhead and a water tank boss. The top surfaces of the lower platform structure and the upper platform structure are provided with hoisting devices for assisting hoisting. Eye ring; the lower platform structure and the upper platform structure are provided with guide grooves on both sides close to the bulkhead, the lower platform structure and the upper platform structure are respectively sleeved on the guide rails through the guide grooves, and the lower platform structure and the upper platform structure are in One side of the guide rail is provided with a guide rail connecting piece for rotating and locking the guide rail; the upper platform structure is detachably fixed above the lower platform structure through the platform connecting piece;

Both the lower platform structure and the upper platform structure include thin platform slabs, T-shaped beams, stiffeners and diagonal support ribs. The T-shaped beams are crisscrossed at the bottom of the thin platform slabs to form a square hollow frame, and the stiffeners are distributed on the thin platform slabs. At the bottom of the frame, the diagonal bracing bars are installed on the webs of the T-beams around the square hollow frame.

Preferably, a lifting eye ring reinforcing rib is provided at the lifting eye ring.

Preferably, both sides of the top of the guide rail are provided with inclined planes.

Preferably, the lower platform structure and the upper platform structure are provided with a plurality of anti-collision blocks on both side walls close to the bulkhead.

Preferably, the top surface of the thin platform plate is provided with a lifting ring installation groove, and the lifting eye ring is embedded in the lifting ring installation groove.

Preferably, the lower platform structure and the upper platform structure are provided with a guide rail connector positioning plate on the outer side of the guide groove, the guide rail connector positioning plate and the outer groove wall of the guide groove are provided with a first installation hole, and the guide rail connector includes a first mounting hole. The bolt and the first ingot nut, the first bolt movably runs through the first installation hole, and the end of the first bolt is provided with a locking block. By rotating the first bolt, the locking block extends into the guide groove to lock the guide rail, The first ingot nut is movably sleeved on the outer side of the first bolt and above the first installation hole.

Preferably, the lower platform structure and the upper platform structure are provided with a plurality of mounting structures, the mounting structures are provided with a second mounting hole, the platform connector includes a second bolt and a second ingot nut, and the second bolt is detachably penetrated through In the second installation hole, the end of the second bolt is provided with a lock head, and the lock head can be clamped at the bottom of the second installation hole; the second ingot nut is movably sleeved on the outside of the second bolt, and the second ingot nut above the second mounting hole.

A design method for a liftable platform, comprising the following steps:

Step 1, the composition of the lower platform structure and the upper platform structure, the T-shaped beams are distributed in a crisscross pattern at the bottom of the thin platform plate to form a square hollow frame; reinforcing ribs are arranged at the bottom of the thin platform plate where the fixed concentration force is relatively large; and Diagonal support ribs are arranged on the webs of the T-beams around the square hollow frame;

Step 2, carry out finite element analysis on the lower platform structure and the upper platform structure, and determine the strength and stiffness of the lower platform structure and the upper platform structure;

In step 3, lifting eye rings for assisting the hoisting of the lower platform structure or the upper platform structure are respectively arranged on the top surfaces of the lower platform structure and the upper platform structure, and a lifting eye ring reinforcing rib is arranged where the lifting eye ring is subjected to a relatively large fixed concentration force. ;

Step 4: Guide grooves are arranged on both sides of the lower platform structure and the upper platform structure close to the bulkhead, and the guide grooves of the lower platform structure and the upper platform structure are drilled to assist the positioning of the lower platform structure and the upper platform structure to the water tank. guide rail on the boss;

Step 5, the lower platform structure and the upper platform structure are provided with guide rail connectors on the outer sides of the guide rails for rotating and locking the guide rails;

Step 6, a platform connecting piece for detachably fixing the upper platform structure above the lower platform structure is disposed through the lower platform structure and the upper platform structure.

Preferably, the steps of the finite element analysis include: importing the lower platform structure and the upper platform structure model into the software, defining the material properties of the structure, calculating the allowable stress δ ₁ , and performing the analysis on the lower platform structure and the upper platform structure model through the finite element software. In static analysis and model analysis, the equivalent stress and deformation cloud diagrams of the lower platform structure and the upper platform structure are obtained, and the maximum stress |δ ₂ | of the lower platform structure and the upper platform structure is determined to be less than the allowable stress |δ ₁ |.

Compared with the prior art, the present invention has the following advantages:

1. In the present invention, a raised platform is placed on the boss of the water tank, so that during the pulp packing and unloading process, the pulp bale as a whole can be kept horizontal, so that the full lifting operation is satisfied, and the loading and unloading efficiency and safety are improved;

2. In the present invention, the upper platform structure is detachably fixed above the lower platform structure, so that the height of the heightened platform can be flexibly adjusted, and the risk of cargo damage caused by the inconsistent loading height of pulp bales caused by pulp bales of different sizes is reduced, so that the Meet the requirements of maintaining the level of pulp bales of various specifications in the tank;

3. In the present invention, the guide rail is fixed on the bulkhead and the water tank boss, the lower platform structure and the upper platform structure are sleeved on the guide rail through the guide groove, and the height-enhancing platform can be realized by rotating the locking guide rail through the guide rail connector. Fixed, no need for hot operation, avoiding the burning of pulp bales, reducing the difficulty of installation, and no need for large-area welding, making installation more convenient, improving installation efficiency, and reducing the difficulty of disassembly;

4. In the present invention, the T-shaped beams are distributed at the bottom of the thin platform plate in a crisscross pattern to form a square hollow frame, and then reinforcing ribs and diagonal support ribs are set to further strengthen, so as to form a lighter and safer lower platform that meets the structural strength requirements. The structure and the upper platform structure reduce the difficulty of hoisting and unnecessary work risks.

Description of drawings

In order to explain the embodiments of the present invention or the technical solutions in the prior art more clearly, the following briefly introduces the accompanying drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only These are some embodiments of the present invention, and for those of ordinary skill in the art, other drawings can also be obtained from these drawings without any creative effort.

1 is a schematic diagram of the use state of the middle and lower platform structures and the upper platform structures of the heightening platform of the present invention being stacked and used;

2 is a schematic diagram of the use state of the middle and lower platform structures of the height-enhancing platform of the present invention;

Fig. 3 is the structural representation of the present invention raising platform;

Fig. 4 is the front view of the raising platform of the present invention;

Fig. 5 is the rear view of the raising platform of the present invention;

Fig. 6 is the left side view of the raising platform of the present invention;

Fig. 7 is the right side view of the raising platform of the present invention;

Fig. 8 is the schematic diagram of not locking the guide rail at place A in Fig. 4;

Fig. 9 is the schematic diagram of locking guide rail at place A in Fig. 4;

Figure 10 is a schematic diagram of the connection of the platform connector at B in Figure 5;

11 is a top view of the lower platform structure or the upper platform structure of the present invention;

12 is a bottom view of the lower platform structure or the upper platform structure of the present invention.

Attached identification:

1. Lower platform structure; 11. Thin platform plate; 12. T-beam; 13. Reinforcing ribs; 14. Oblique support ribs; 2. Upper platform structure; 3. Guide rails; 31. Guide grooves; 4. Lifting eye rings; 41. Reinforcing rib of lifting eye ring; 42. Installation groove of lifting ring; 5. Guide rail connector; 51. Guide rail connector positioning plate; 52. First installation hole; One ingot nut; 55, locking block; 6, platform connector; 61, installation structure; 62, second installation hole; 63, second bolt; 64, second ingot nut; 65, lock head; 661, lower platform Connector positioning plate; 662, upper platform connector positioning plate; 663, card slot; 7, anti-collision block; 71, backing plate.

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

In the description of the present invention, it should be noted that the orientations or positional relationships indicated by the terms "upper", "lower", "left", "right", "inner", "outer", etc. are based on those shown in the accompanying drawings. The orientation or positional relationship is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the indicated device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention. Furthermore, the terms "first," "second," "third," "fourth," etc. are used for descriptive purposes only and should not be construed to indicate or imply relative importance.

In the description of the present invention, it should be noted that the terms "installed", "connected" and "connected" should be understood in a broad sense, unless otherwise expressly specified and limited, for example, it may be a fixed connection or a detachable connection Connection, or integral connection; can be mechanical connection, can also be electrical connection; can be directly connected, can also be indirectly connected through an intermediate medium, can be internal communication between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood in specific situations.

As shown in Fig. 1 and Fig. 12, it is a lifting platform provided by the present invention, which includes a lower platform structure 1, an upper platform structure 2, and a guide rail 3 fixed on the bulkhead and the water tank boss. The lower platform The four corners of the top surface of the structure 1 and the upper platform structure 2 are symmetrically distributed with lifting eye rings 4, wherein the lifting eye ring 4 on the lower platform structure 1 is used to assist in hoisting the lower platform structure 1, and the lifting eye ring on the upper platform structure 2 is used. The ring 4 is used to assist in hoisting the upper platform structure 2;

Judging from the situation of the 62,000-ton pulp ship loading Brazilian BRACELL pulp, in the 1st cabin of the 62,000-ton pulp ship, the water tank boss is located at the corner of the bulkhead, and the height of the water tank boss is 3.3m, while a layer of Brazilian BRACELL pulp The height of the pulp bales is about 2m. After 2 layers of pulp bales are installed, the height of the surrounding pulp bales is 4m, which is higher than the height of the water tank boss at the corner. Therefore, a raised platform needs to be arranged on the water tank boss. Because the lower platform structure 1 and the upper platform The height of the structure 2 is 0.35m, so the lower platform structure 1 and the upper platform structure 2 can be superimposed on the water tank boss to increase the height of the water tank boss. The use state is shown in Figure 1; The total height of the platform and the heightened platform reaches 4m, which is the same as the height of the surrounding pulp bales after 2 layers of Brazilian BRACELL pulp are loaded. It can meet the full lifting operation, so that the overall pulp bales remain level after stacking, thereby improving the loading efficiency, and avoiding the direct contact between the steel wires and hook heads of the lifting beam due to the unevenness of the pulp bales and the bulkhead, thereby reducing the wire grinding. The risk of breakage is improved, and the safety of loading and unloading is improved;

The lower platform structure 1 and the upper platform structure 2 are fixedly connected to the bulkhead and the water tank boss through the two sides close to the bulkhead. Specifically, the lower platform structure 1 and the upper platform structure 2 are on the two sides close to the bulkhead. Guide grooves 31 are provided throughout, and the guide grooves 31 are located on the ends of the lower platform structure 1 and the upper platform structure 2 away from the corner of the bulkhead; the guide rail 3 is fixed on the bulkhead corresponding to the guide groove 31, and the guide rail 3 The bottom falls on the water tank boss; the lower platform structure 1 and the upper platform structure 2 are respectively sleeved on the guide rail 3 through the guide groove 31, and the lower platform structure 1 and the upper platform structure 2 can be placed on the water tank boss; In addition, the lower platform structure 1 and the upper platform structure 2 are provided with guide rail connectors 5 on the outside of the guide rails 3. The guide rail connectors 5 can be rotated to make the guide rail connectors 5 enter the guide grooves 31 from the outer side wall of the guide grooves 31, thereby The guide rail 3 is locked, so as to realize the fixed connection of the lower platform structure 1 and the upper platform structure 2 with the bulkhead and the water tank boss, thereby increasing the water tank boss;

When installing the heightening platform, first fix the guide rail 3: first place the lower platform structure 1 on the water tank boss, wherein the lower platform structure 1 is provided with the guide grooves 31 on both sides of the bulkhead, and the lower platform structure 1 is aligned with both sides of the bulkhead. 1. Align the corners of both sides near the bulkhead with the corners of the bulkhead, and then place the two guide rails 3 in the guide grooves 31 of the lower platform structure 1 respectively, and make the guide rails 3 completely fall on the water tank boss to determine the guide rails 3. Then lift the lower platform structure 1 away, and then firmly weld the guide rail 3 on the bulkhead and the water tank boss;

Preparation before installation of the raised platform: According to the height of the target pulp bales, determine the height of the raised platform to determine the number of platform structures, so that the height of the raised water tank boss is flush with the height of the target pulp bales after stacking. Taking Brazil BRACELL pulp as an example, it is necessary to stack the lower platform structure 1 and the upper platform structure 2 on the water tank boss to increase the height of the water tank boss;

Then firstly rotate the guide rail connectors 5 of the lower platform structure 1 and the upper platform structure 2 to retract the ends of the guide rail connectors 5 into the outer groove wall of the guide groove 31, so as to avoid the assembly of the lower platform structure 1 and the upper platform structure 2 During the process of being placed on the outside of the guide rail 3, the guide rail connector 5 touches the guide rail 3;

Install the lower platform structure 1 and the upper platform structure 2: use the ship's own ballast water system to adjust the fore and aft balance of the ship, and then use slings with appropriate safety loads, use four hooks (with safety anti-drop devices) or unload The buckles are respectively connected with the four lifting eye rings 4 on the lower platform structure 1. Use a crane to align the lower platform structure 1 with the guide rails 3 and slowly slide it down to the water tank boss; The quasi guide rail 3 slowly slides down and superimposes on the top of the lower platform structure 1. After confirming that the lower platform structure 1 and the upper platform structure 2 are aligned up and down, rotate and push the guide rail connectors of the lower platform structure 1 and the upper platform structure 2 in the direction of the guide rail 3 respectively. 5. The guide rail connector 5 penetrates into the guide groove 31 from the outer groove wall of the guide groove 31, and continues to reduce the distance between the end of the guide rail connector 5 and the inner side wall of the guide groove 31 until the end of the guide rail connector 5 and the guide groove 31. The inner sidewalls of the ducts are respectively placed on both sides of the guide rails 3, that is, to achieve the purpose of locking the guide rails 3. At this time, the heightened platform is fixedly connected with the bulkhead and the water tank boss;

Finally, the lower platform structure 1 and the upper platform structure 2 are fixedly connected: the platform connector 6 is used again, and the platform connector 6 is passed through and clamped on both sides of the lower platform structure 1 and the upper platform structure 2 away from the bulkhead, so as to connect the upper platform The platform structure 2 is fixedly stacked above the lower platform structure 1 .

More preferably, the upper platform structure 2 can be fixedly stacked on the top of the lower platform structure 1 by using the platform connecting piece 6 on the flat ground to form a whole, and then the lower platform structure 1 and the upper platform structure 2 can be combined together by a crane. Hoisting, and sliding along the guide rail 3 to the water tank boss, the one-time hoisting operation is faster and safer than hoisting the lower platform structure 1 and the upper platform structure 2 separately.

In the present invention, the guide rail 3 is first welded on the bulkhead and the water tank boss, and then the ship's own ballast water system is used to adjust the front and rear balance of the ship, and then the lower platform structure 1 and the upper platform structure 2 are lowered along the guide rail 3 to the The water tank boss, and finally use the guide rail connector 5 to rotate the locking guide rail 3 to realize the fixed connection between the raised platform and the bulkhead and the water tank boss. The whole installation process does not require hot operation, so as to avoid the burning of the pulp bales. When the situation occurs, there is no need for large-area welding, the installation is more convenient, and the installation efficiency is improved. Moreover, when the height-increasing platform needs to be disassembled, it is only necessary to turn and loosen the guide rail connector 5, and the lower platform structure 1 and the upper platform structure 2 along the guide rails. 3. Lift it up, then cut and take out the guide rail 3, which greatly reduces the difficulty of disassembly;

From the situation of the 62,000-ton pulp ship loading POTOCEL pulp, the height specification of POTOCEL pulp is 1.87m. After the two layers of pulp bales are loaded, the height of the surrounding pulp bales is 3.74m, which is higher than the water tank boss. Due to the lower platform structure 1 The height of the upper platform structure 2 and the upper platform structure 2 are both 0.35m, so it is only necessary to arrange the lower platform structure 1 on the water tank boss to be roughly the same as the height of the surrounding pulp bales after the two layers of POTOCEL pulp are installed. The use state is shown in Figure 2. Therefore, it can also ensure that the pulp bales continue to be loaded on the second layer of POTOCEL pulp, and the overall pulp bales remain horizontal, thereby improving the loading efficiency, and avoiding the steel wires and hook heads of the lifting beam caused by the unevenness of the pulp bales. Direct contact with the bulkhead, thereby reducing the risk of wire breakage and improving loading safety;

Therefore, the height of the raised platform can be flexibly adjusted according to the pulp bales of different heights. According to the pulp bales of different heights, the lower platform structure 1 can be placed on the water tank boss alone for use, or the upper platform can be stacked on the basis of the lower platform structure 1. The structure 2 is fixedly connected for use through the platform connector 6, and the upper platform structure 2 can also be disassembled from the top of the lower platform structure 1, so that the lower platform structure 1 can be used alone; The stacking use of the structures 1 is reduced to when the lower platform structure 1 is used alone. Specifically, the platform connectors 6 are disassembled from the lower platform structure 1 and the upper platform structure 2, and then the crane is used to lift off the upper platform structure 2 through the lifting eye ring 4. Yes, it means that the upper platform structure 2 is detachably fixed above the lower platform structure 1 through the platform connector 6, so that the heightened platform of the present invention can meet the requirement that pulp bales of various specifications are always kept horizontal during the loading and unloading process;

The lower platform structure 1 and the upper platform structure 2 have the same structure. Both the lower platform structure 1 and the upper platform structure 2 include a thin platform plate 11, a T-shaped beam 12, reinforcing ribs 13 and diagonal support ribs 14, and the T-shaped beams 12 are distributed in a crisscross pattern. At the bottom of the thin platform plate 11 to form a square hollow frame, the reinforcing ribs 13 are distributed at the bottom of the thin platform plate 11 where the fixed concentration force is relatively large, and the diagonal support ribs 14 are installed on the web of the T-shaped beam 12 around the square hollow frame. Above, through calculation and analysis, the structures of the lower platform structure 1 and the upper platform structure 2 in this embodiment meet the strength requirements, and each square meter can bear 10t pulp bales.

In addition, the present invention achieves the decomposition of the thickness of the thin platform plate 11 through the crisscross distribution of a plurality of T-shaped beams 12, so a thin platform plate 11 with a thinner plate thickness can be used, which reduces the weight of the platform plate compared to the platform plate of the box platform. And as shown in Figure 12, the flanges of the criss-crossed T-beams 12 form a grid, which doubles as a bottom plate, which reduces the weight compared to the bottom plate of the box platform; as shown in Figure 3, the square hollow The webs of the T-shaped beams 12 around the frame are also used as side plates to replace the side plates of the box body; and the criss-cross arrangement of the T-shaped beams 12 strengthens the structural strength of the heightened platform, so it can relatively reduce the internal reinforcement of the square hollow frame. 13, thereby reducing the weight of the heightened platform;

Therefore, the lower platform structure 1 and the upper platform structure 2 of the present invention are lighter and safer while meeting the structural strength requirements, thereby reducing the difficulty of hoisting and avoiding affecting the load-bearing of the bottom water tank boss, thereby reducing unnecessary work risks .

Further, when placing the lower platform structure 1 and the upper platform structure 2, it is necessary to connect the lower platform structure 1 and the upper platform structure 2 with the lifting eye ring 4 through a sling. In order to avoid the stress around the lifting eye ring 4 It is too large and cracked, so the lifting eye ring reinforcing rib 41 is provided at the place where the lifting eye ring 4 is subjected to a large fixed concentration force, so as to improve the structural strength of the lower platform structure 1 and the upper platform structure 2 .

Furthermore, two sides of the top of the guide rail 3 are provided with inclined surfaces, and the inclined surfaces are provided with a guiding function, which can assist in the positioning and installation of the lower platform structure 1 and the upper platform structure 2 .

Further, taking the following platform structure 1 as an example, the lower platform structure 1 is provided with four backing plates 71 on both side walls close to the bulkhead, wherein the two backing plates 71 are located at the corners of the lower platform structure 1 near the bulkhead, and in addition The two backing plates 71 are respectively arranged near the guide grooves 31 on both sides, and the upper platform structure 2 is also arranged in the same way; the lower platform structure 1 and the upper platform structure 2 are respectively provided with anti-collision blocks 7 on the eight backing plates 71. Block 7 is fixed on the backing plate 71 by four bolts, which is used to effectively reduce the collision and friction between the lower platform structure 1 and the upper platform structure 2 and the bulkhead during the hoisting process; and the anti-collision block 7 can be disassembled after serious wear and tear Replace with new one.

Further, a lifting ring mounting groove 42 is provided on the top surface of the thin platform plate 11, and the lifting eye ring 4 is embedded in the lifting ring mounting groove 42, so that the top surface of the lifting eye ring 4 is flush with the top surface of the thin platform plate 11. , so as to prevent the lifting eye ring 4 from protruding from the thin platform plate 11 and affecting the stability of the pulp package here.

Further, taking the following platform structure 1 as an example, the lower platform structure 1 is provided with a guide rail connector positioning plate 51 on the outer side of the guide groove 31, and the guide rail connector positioning plate 51 and the outer groove wall of the guide groove 31 are provided with a first mounting hole 52;

The guide rail connector 5 includes a first bolt 53 and a first ingot nut 54. The first bolt 53 penetrates through the first mounting hole 52 from above the guide rail connector positioning plate 51, and the end of the first bolt 53 is provided with a locking block 55. The first mounting hole 52 includes a mounting hole penetrating the outer side of the screw rod of the first bolt 53 and a limiting hole 521 penetrating the outer side of the locking block 55 at the end of the first bolt 53, and the limiting hole 521 is located on the outer groove wall of the guide groove 31. Up; when the lower platform structure 1 is to be set on the outside of the guide rail 3, first turn the first bolt 53 counterclockwise above the guide rail connector positioning plate 51 until the locking block 55 at the end of the first bolt 53 is completely screwed to the outside of the guide groove 31 In the limit hole 521 of the groove wall, to prevent the locking block 55 from protruding from the outer groove wall of the guide groove 31 and touching the guide rail 3, as shown in Figure 8; the current platform structure 1 is aligned with the guide rail 3 and slides down to the water tank boss After mounting, rotate the first bolt 53 clockwise, so that the locking block 55 at the end of the first bolt 53 passes through the limit hole 521 and extends into the guide groove 31, and continues to rotate the first bolt 53 to shrink the locking block 55 and the guide The distance between the inner groove walls of the groove 31 is adjusted until the locking block 55 and the inner groove walls of the guide groove 31 are respectively abutted on both sides of the guide rail 3, so as to realize the locking of the guide rail 3, as shown in FIG. 9; The first ingot nut 54 is sleeved on the outer side of the bolt 53, and the first ingot nut 54 is located above the first installation hole 52. Therefore, finally, the first ingot nut 54 can be clamped on the first installation by tightening the first ingot nut 54. hole 52, so as to prevent the first bolt 53 from sliding; the same arrangement is also provided in the upper platform structure 2.

Further, the lower platform structure 1 and the upper platform structure 2 are provided with a plurality of mounting structures 61, and the mounting structures 61 are provided with second mounting holes 62; On the two sides of the platform structure 2 away from the bulkhead, as shown in FIG. 10 , the installation structure 61 includes a lower platform connecting piece positioning plate 661 arranged between the thin platform plate 11 of the lower platform structure 1 and the T-beam flange. The upper platform connecting piece positioning plate 662 between the thin platform plate 11 of the platform structure 2 and the T-shaped beam flange, the upper platform connecting piece positioning plate 662, the T-shaped beam flange at the bottom of the upper platform structure 2 and the lower platform connecting piece positioning plate 661 are all corresponding installation holes are provided, and the plurality of installation holes communicate with each other to form a second installation hole 62;

The platform connector 6 includes a second bolt 63 and a second ingot nut 64. The second bolt 63 penetrates through the second mounting hole 62, and the end of the second bolt 63 is provided with a lock head 65, and the lower platform connector positioning plate 661 There is a card slot 663 at the bottom of the device, and the card slot 663 is a cross slot, so when the upper platform structure 2 is stacked above the lower platform structure 1 and is aligned up and down, insert the second bolt 63 from the upper platform structure 2 into the second installation hole 62, until the lock head 65 at the end of the second bolt 63 passes through the lower platform connecting piece positioning plate 661, that is, when the bottom of the second installation hole 62, rotate the second bolt 63 by 90°, so that the lock head at the end of the second bolt 63 65 is clamped in the slot 663; and since the second ingot nut 64 is sleeved on the outside of the second bolt 63, and the second ingot nut 64 is located above the second installation hole 62, the second ingot nut 64 can be rotated by rotating the second ingot nut 64. The second ingot nut 64 is locked at the second mounting hole 62, as shown in FIG. 10, so that the second bolt 63 is not easy to slide. At this time, the lower platform structure 1 and the upper platform structure 2 are fixedly connected; When the platform structure 2 and the lower platform structure 1 are stacked together to reduce the use of the lower platform structure 1 alone, firstly rotate the second ingot nut 64 in the opposite direction to make the second bolt 63 rotate, and then rotate the second bolt 63 in the opposite direction by 90°. The locking head 65 at the end of the second bolt 63 can be disengaged from the locking groove 663 and disassembled through the second mounting hole 62 , and then the crane can be used to lift off the upper platform structure 2 through the lifting eye ring 4 .

The present invention also provides a method for designing a detachable height-enhancing platform, comprising the following steps:

Step 1, the composition of the lower platform structure 1 and the upper platform structure 2, the T-beams 12 are distributed in a crisscross pattern at the bottom of the thin platform plate 11 to form a square hollow frame; Reinforcing ribs 13 are arranged at the fixed concentrated force; and diagonal support ribs 14 are arranged on the webs of the T-beams 12 around the square hollow frame;

Step 2, import the models of the lower platform structure 1 and the upper platform structure 2 into the finite element software, and define the material properties of the structure. Specifically, steel Q355 is selected, the elastic modulus is 2.06E5MPa, and the yield strength δ is 355MPa. According to the brittle material calculation formula δ ₁ = 0.9δ Calculated, the allowable stress δ1 is _319.5MPa ; static analysis and model analysis are carried out on the lower platform structure 1 and upper platform structure 2 through finite element software, and the lower platform structure 1 and upper platform structure 2 are obtained. Equivalent stress deformation cloud diagram, it is concluded that the maximum stress of this embodiment is 63.6MPa, and 63.6MPa is less than 319.5MPa, so it is determined that the maximum stress |δ ₂ | of the lower platform structure 1 and the upper platform structure 2 is less than the allowable stress |δ ₁ |, it can be determined that the strength and stiffness of the lower platform structure 1 and the upper platform structure 2 meet the strength requirements;

If |δ ₂ |>|δ ₁ |, adjust the lower platform structure 1 and the upper platform structure 2 and recalculate the maximum stress δ ₂ until |δ ₂ |≤|δ ₁ |, and finally determine the lower platform structure 1 that meets the strength requirements and upper platform structure 2

In step 3, lifting eye rings 4 for assisting the hoisting of the lower platform structure 1 or the upper platform structure 2 are respectively arranged on the top surfaces of the lower platform structure 1 and the upper platform structure 2, and the lifting eye ring 4 is subjected to a larger fixed concentration force. Set the lifting eye ring stiffener 41;

Step 4, guide grooves 31 are provided on both sides of the lower platform structure 1 and the upper platform structure 2 close to the bulkhead, and the guide grooves 31 of the lower platform structure 1 and the upper platform structure 2 are drilled to assist the lower platform structure 1 and the upper platform structure 2. The upper platform structure 2 is positioned to the guide rail 3 on the water tank boss;

Step 5, the lower platform structure 1 and the upper platform structure 2 are provided with a guide rail connector 5 on the outer side of the guide rail 3 for rotating and locking the guide rail 3;

Step 6 , a platform connector 6 for detachably fixing the upper platform structure 2 on the upper platform of the lower platform structure 1 is disposed through the lower platform structure 1 and the upper platform structure 2 .

Among them, in the present invention, a plurality of T-shaped beams 12 are arranged in a crisscross pattern to achieve the decomposition of the thickness of the thin platform plate 11, so a thin platform plate 11 with a thinner plate thickness can be used. Compared with the platform plate of the box platform, The weight is reduced; and as shown in Figure 12, the flanges of the crisscrossed T-beams 12 form a grid, which doubles as a bottom plate, which reduces the weight relative to the bottom plate of the box platform; as shown in Figure 3, the square The webs of the T-shaped beams 12 around the hollow frame are also used as side plates to replace the side plates of the box body; and the crisscross arrangement of the T-shaped beams 12 strengthens the structural strength of the heightened platform, so it can relatively reduce the internal reinforcement of the square hollow frame. The arrangement of the ribs 13 reduces the weight of the heightened platform; therefore, the lower platform structure 1 and the upper platform structure 2 provided by the present invention are lighter and safer while meeting the structural strength requirements, thereby reducing the difficulty of hoisting and avoiding affecting the bottom water tank. The bearing of the boss, thereby reducing unnecessary work risks;

The lower platform structure 1 and the upper platform structure 2 of the present invention satisfy the light weight, so the finite element analysis provides a theoretical basis for the lightweight of the lower platform structure 1 and the upper platform structure 2;

Lifting eye rings 4 are respectively provided on the top surfaces of the lower platform structure 1 and the upper platform structure 2, wherein the lifting eye ring 4 on the lower platform structure 1 is used to assist in hoisting the lower platform structure 1, and the lifting eye ring on the upper platform structure 2 4 is used to assist in hoisting the upper platform structure 2; the lifting eye ring reinforcing rib 41 is set at the place where the lifting eye ring 4 is subjected to a large fixed concentration force, which can prevent the surrounding of the lifting eye ring 4 from cracking due to excessive stress, thereby improving the lower platform structure. 1 and the structural strength of the upper platform structure 2;

Guide grooves 31 are provided on both sides of the lower platform structure 1 and the upper platform structure 2 close to the bulkhead, and guide rails 3 are penetrated in the guide grooves 31 of the lower platform structure 1 and the upper platform structure 2. Since the guide rails 3 are first fixed in the cabin Therefore, when the guide grooves 31 of the lower platform structure 1 and the upper platform structure 2 are sleeved on the outside of the guide rail 3, the lower platform structure 1 and the upper platform structure 2 can be placed on the water tank boss. The corresponding position on the upper, that is, the guide rail 3 can assist the positioning of the lower platform structure 1 and the upper platform structure 2; The locking guide rail 3 can be rotated to fix the raised platform on the boss of the water tank without hot operation, so as to avoid the burning of the pulp bales, and no need for large-area welding, so the installation is more convenient;

In the present invention, the upper platform structure 2 is detachably fixed above the lower platform structure 1 by arranging the platform connecting piece 6, so that the height of the raised platform can be flexibly adjusted, and the inconsistency in the loading height of pulp bales caused by pulp bales of different sizes is reduced. The risk of cargo damage, so that the pulp bales of various specifications can be kept level in the tank;

In the present invention, a raised platform is placed on the boss of the water tank, so that during the pulp packing and unloading process, the pulp bale can be kept horizontal as a whole, so that the full lifting operation is satisfied, the loading and unloading efficiency is improved, and the steel wire and the hook head of the lifting beam are prevented from being directly connected with each other. The bulkhead contact reduces the risk of wire breakage and improves the safety of loading and unloading.

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included in the scope of the present invention. within the scope of protection.

Claims (9)

1. a lifting platform that can be lifted off, is characterized in that, It comprises a lower platform structure (1), an upper platform structure (2) and a guide rail (3) fixed on the bulkhead and the water tank boss, and the top surfaces of the lower platform structure (1) and the upper platform structure (2) Both are provided with hoisting eye rings (4) for assisting hoisting; the lower platform structure (1) and the upper platform structure (2) are provided with guide grooves (31) on both sides close to the bulkhead, and the lower platform structure (1) and the upper platform structure (2) are provided with guide grooves (31). The platform structure (1) and the upper platform structure (2) are respectively sleeved on the guide rails (3) through the guide grooves (31), and the lower platform structure (1) and the upper platform structure (2) are mounted on the guide rails (3). One side of the guide rail (3) is provided with a guide rail connector (5) for rotating and locking the guide rail (3); the upper platform structure (2) is detachably fixed on the Above the lower platform structure (1); The lower platform structure (1) and the upper platform structure (2) both include a thin platform plate (11), a T-shaped beam (12), reinforcing ribs (13) and diagonal support ribs (14). 12) The bottom of the thin platform plate (11) is crisscrossed and distributed to form a square hollow frame, the reinforcing ribs (13) are distributed on the bottom of the thin platform plate (11), and the diagonal support ribs (14) ) are mounted on the webs of the T-beams (12) around the square hollow frame. 2. The lifting platform according to claim 1, characterized in that, A lifting eye ring reinforcing rib (41) is provided at the lifting eye ring (4). 3. The lifting platform according to claim 1, characterized in that, Both sides of the top of the guide rail (3) are provided with inclined planes. 4. The liftable platform according to claim 1, characterized in that, The lower platform structure (1) and the upper platform structure (2) are provided with a plurality of anti-collision blocks (7) on both side walls close to the bulkhead. 5. The lifting platform according to claim 4, characterized in that, A lifting ring mounting groove (42) is provided on the top surface of the thin platform plate (11), and the lifting eye ring (4) is embedded in the lifting ring mounting groove (42). 6. The lifting platform according to claim 1, characterized in that, The lower platform structure (1) and the upper platform structure (2) are provided with a guide rail connector positioning plate (51) on the outer side of the guide groove (31), the guide rail connector positioning plate (51) and the guide The outer groove wall of the groove (31) is provided with a first installation hole (52), the guide rail connecting piece (5) includes a first bolt (53) and a first ingot nut (54), the first bolt ( 53) The movement runs through the first installation hole (52), and the end of the first bolt (53) is provided with a locking block (55). The locking block (55) extends into the guide groove (31) to lock the guide rail (3), the first ingot nut (54) is movably sleeved on the outside of the first bolt (53), and is located in the above the first mounting hole (52). 7. The detachable raised platform according to claim 1 is characterized in that, The lower platform structure (1) and the upper platform structure (2) are provided with a plurality of mounting structures (61), and the mounting structures (61) are provided with second mounting holes (62), and the platforms are connected to each other. The component (6) includes a second bolt (63) and a second ingot nut (64), the second bolt (63) is detachably penetrated through the second installation hole (62), and the second bolt (63) A lock head (65) is provided at the end, and the lock head (65) can be clamped at the bottom of the second installation hole (62); the second ingot nut (64) is movably sleeved on the second bolt (63), and the second ingot nut (64) is located above the second mounting hole (62). 8. A design method of a lift-off type heightening platform, characterized in that, comprising the following steps: Step 1, the composition of the lower platform structure (1) and the upper platform structure (2): the T-shaped beams (12) are distributed in a crisscross pattern at the bottom of the thin platform plate (11) to form a square hollow frame; Reinforcing ribs (13) are provided at the bottom of the plate (11) where a large fixed concentration force is applied; and diagonal support ribs (14) are provided on the webs of the T-beams (12) around the square hollow frame; In step 2, finite element analysis is performed on the lower platform structure (1) and the upper platform structure (2) to determine the strength and stiffness of the lower platform structure (1) and the upper platform structure (2); In step 3, lifting eye rings (4) for assisting the hoisting of the lower platform structure (1) or the upper platform structure (2) are respectively provided on the top surfaces of the lower platform structure (1) and the upper platform structure (2), And a lifting eye ring reinforcing rib (41) is arranged at the place where the lifting eye ring (4) is subjected to a relatively large fixed concentration force; In step 4, guide grooves (31) are arranged on both sides of the lower platform structure (1) and the upper platform structure (2) close to the bulkhead, and the lower platform structure (1) and the upper platform structure (2) A guide rail (3) for assisting the positioning of the lower platform structure (1) and the upper platform structure (2) to the water tank boss is passed through the guide groove (31) of the ); Step 5, the lower platform structure (1) and the upper platform structure (2) are provided with guide rail connectors (5) for rotating and locking the guide rails (3) on the outside of the guide rails (3); Step 6, a platform connection for detachably fixing the upper platform structure (2) above the lower platform structure (1) is provided through the lower platform structure (1) and the upper platform structure (2) pieces (6). 9. The design method of the detachable height-raising platform according to claim 8, characterized in that, The steps of the finite element analysis include: importing the models of the lower platform structure (1) and the upper platform structure (2) into the software, defining the material properties of the structures, calculating the allowable stress δ ₁ , and analyzing the lower platform structure ( 1) Perform static analysis and model analysis with the upper platform structure (2) model, obtain the equivalent stress and deformation cloud diagrams of the lower platform structure (1) and the upper platform structure (2), and determine the lower platform structure (1) and the upper platform structure (2) The maximum stress |δ ₂ | is smaller than the allowable stress |δ ₁ |.

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