CN113800408B

CN113800408B - Ring rail crane, ring rail crane assembling method and disassembling method

Info

Publication number: CN113800408B
Application number: CN202111142952.3A
Authority: CN
Inventors: 赵江平; 孟进军; 孙丽; 陈卫东
Original assignee: Construction Machinery Branch of XCMG
Current assignee: Construction Machinery Branch of XCMG
Priority date: 2021-09-28
Filing date: 2021-09-28
Publication date: 2024-04-16
Anticipated expiration: 2041-09-28
Also published as: CN113800408A

Abstract

The invention discloses a circular rail crane, an assembling method and a disassembling method of the circular rail crane, and relates to the field of engineering machinery. The circular track crane comprises a platform, a crane boom, a mast system and a support frame system. The platform is configured to provide support; the crane boom is arranged on the platform; the mast system is arranged on the platform; the mast system is configured to implement boom raising, work and lowering; the support frame system is arranged on the platform; the support frame system is configured to effect boom raising and lowering of the mast system. According to the technical scheme, the use of the auxiliary crane is reduced, and the specification of the auxiliary crane is reduced; because the number of the auxiliary cranes is small, the occupied space is small, the assembly space is effectively reduced, the specification of the auxiliary cranes is reduced, and the operation economy of the equipment is practically improved.

Description

Ring rail crane, ring rail crane assembling method and disassembling method

Technical Field

The invention relates to the field of engineering machinery, in particular to a circular rail crane, a circular rail crane assembling method and a circular rail crane disassembling method.

Background

Along with continuous optimization and upgrading of engineering application fields, from the aspect of construction, lifting operation is more and more prominent in efficiency and safety, large-scale member ground modular prefabrication and petrochemical tank integrated lifting are more and more the development trend of each industry. The lifting construction of the continuously emerging oversized and oversized device brings more and more requirements to the capacity of the lifting machinery, and the circular track crane is generated. From the technical aspect, the hoisting machinery is increasingly large, and higher requirements are necessarily put on the assembly and disassembly of the whole machine; the large-scale hoisting machinery also causes a problem of excessive assembly cost in terms of operation.

The trolley crane includes a boom and a mast system. The mast system is used for realizing operations such as lifting, hoisting and falling of the lifting arm, and is one of important components of the circular rail crane. The structure of the crane arm is closely related to the lifting weight of the circular rail crane, and the larger the structure and the heavier the weight of the crane arm, the larger the lifting weight of the circular rail crane. The weight of the boom is high and accordingly the construction and weight of the mast system is required.

How to assemble and disassemble the ring rail crane is also an important factor affecting the development of the ring rail crane towards larger working capacities. In the related art, the assembly process of the ring rail crane is as follows: firstly, assembling all parts of a mast system into a whole on the ground; the mast system is then hoisted using two or more auxiliary large cranes and then mounted to the platform of the trolley crane. The boom is then installed and the boom is raised, worked and lowered using the mast system.

The inventors found that at least the following problems exist in the prior art: the annular rail crane has huge lifting capacity, the mast system is quite large, and a plurality of auxiliary large cranes are required to be used for lifting the mast in the process of assembling and disassembling the annular rail crane. The mounting and dismounting difficulties of the circular rail crane are increased; on the other hand, the assembly and disassembly cost and the occupied area of the circular rail crane are greatly improved.

Disclosure of Invention

The invention provides a circular rail crane, an assembling method and a disassembling method of the circular rail crane, which are used for reducing the assembling and disassembling difficulties and cost of the circular rail crane.

The embodiment of the invention provides a circular rail crane, which comprises the following components:

a platform configured to provide support;

a crane boom mounted to the platform;

a mast system mounted to the platform; the mast system is configured to effect boom raising, working, and lowering of the boom; and

the support frame system is arranged on the platform; the support frame system is configured to effect the mast system boom up and boom down.

In some embodiments, the support frame system comprises:

one end of the first supporting frame is arranged at one end of the platform;

one end of the second supporting frame is arranged at the other end of the platform; the other end of the first supporting frame is hinged with the other end of the second supporting frame; and

the first amplitude changing system is arranged at the hinge joint of the other end of the first support frame and the other end of the second support frame, and is connected with the mast system to realize amplitude changing of the mast system.

In some embodiments, the support frame system further comprises:

and the reinforcing frame is arranged between the first supporting frame and the platform so as to support the first supporting frame.

In some embodiments, the support frame system further comprises:

the driving mechanism is arranged between the first support frame and the platform to lift and lower the first support frame.

In some embodiments, the drive mechanism comprises a ram.

In some embodiments, the mast system comprises:

one end of the first mast is arranged at one end of the platform;

one end of the second mast is arranged at the other end of the platform; the other end of the first mast is hinged with the other end of the second mast; and

the second amplitude changing system is arranged at the hinge joint of the other end of the first mast and the other end of the second mast and is connected with the crane boom so as to realize amplitude changing of the crane boom.

In some embodiments, the number of each of the first mast, the second mast, and the second luffing system is at least one; the first luffing system may be the same as or different in number from the first mast.

In some embodiments, the number of first masts is more than two, each of the first masts being fixedly connected.

In some embodiments, the second support frame is a partial arm section of the second mast.

The embodiment of the invention also provides an assembly method of the annular rail crane, which is realized by adopting the annular rail crane provided by any technical scheme of the invention, and comprises the following steps:

installing a first support frame of the support frame system on the platform, and connecting the second support frame with the first support frame;

mounting the first mast to the platform;

such that the first mast is supported by the boom;

mounting a first portion of the second mast to the first mast; wherein the second mast comprises a first portion and a second portion detachably connected;

lifting the first support frame and the second support frame of the support frame system by lifting the first support frame of the support frame system;

connecting the second support frame with the platform;

mounting a second portion of the second mast to the platform;

luffing a first mast of the mast system with a first luffing system of the support frame system;

connecting the first and second portions of the second mast after the first mast is luffing in place;

and luffing the crane boom by using a second luffing system of the mast system so as to realize the lifting of the crane boom.

In some embodiments, the mounting the second portion of the second mast to the platform comprises:

and mounting each arm section of the second part of the second mast on the platform in a section-by-section hoisting mode.

In some embodiments, the causing the first mast to be supported by the boom further comprises:

disconnecting two adjacent arm sections of the first mast from a hinge point of the crane boom; the first mast comprises a plurality of arm sections which are sequentially connected, and two adjacent arm sections are hinged at more than two positions; when the first mast is in a state of being supported by the crane boom, part of the hinge points face the crane boom, and the rest hinge points face away from the crane boom;

and fixing the arm section, facing the platform, of the two adjacent arm sections of the first mast with the crane boom frame.

The embodiment of the invention also provides a method for disassembling the circular rail crane, which is realized by adopting the circular rail crane provided by any technical scheme of the invention, and comprises the following steps:

dropping a crane boom of the circular rail crane;

disconnecting the first and second portions of the second mast; wherein the second mast comprises a first portion and a second portion detachably connected;

the first mast of the mast system is luffing by utilizing a first luffing system of the support frame system so as to realize the first mast falling arm;

disconnecting a second portion of the second mast from the platform;

disconnecting the second support frame from the platform;

the first support frame of the support frame system and the second support frame of the support frame system are fallen down, and the first support frame and the second support frame are disassembled after the first support frame and the second support frame fall down in place;

disconnecting the first portion of the second mast from the first mast;

the first mast is detached from the platform.

In some embodiments, the step of removing the second portion of the second mast from the platform comprises the steps of:

the respective arm sections of the second portion of the second mast are disassembled section by section.

The circular track crane provided by the technical scheme comprises a platform, a crane boom, a mast system and a support frame system. In the assembly process and the disassembly process, each first support frame of the support frame system only needs a small and medium auxiliary crane, so that the assembly process and the disassembly process of the circular track crane can be completed, the auxiliary crane can also be used for hoisting a second mast of the mast system, and a plurality of large auxiliary cranes of the whole mast system do not need to be hoisted. According to the technical scheme, the use of the auxiliary crane is reduced, and the specification of the auxiliary crane is reduced; because the number of the auxiliary cranes is small, the occupied space is small, the assembly space is effectively reduced, the specification of the auxiliary cranes is reduced, and the operation economy of the equipment is greatly improved.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this application, illustrate embodiments of the invention and together with the description serve to explain the invention and do not constitute a limitation on the invention. In the drawings:

fig. 1 is a schematic structural diagram of a circular rail crane according to an embodiment of the present invention.

Fig. 2 is a schematic diagram of a first mast and a first support frame mounted on a platform in an assembly method of a ring rail crane according to an embodiment of the invention.

Fig. 3 is a schematic diagram of a broken first mast in which two arm segments are partially hinged in the method for assembling the ring rail crane according to the embodiment of the invention.

Fig. 4 is a schematic diagram of a support frame system installed in place in the method for assembling a ring rail crane according to an embodiment of the present invention.

Fig. 5 is a schematic diagram of a process in which a first luffing structure drives a whole first mast to luffing in an assembly method of a ring rail crane according to an embodiment of the present invention.

Fig. 6 is a schematic diagram of a process of the first luffing structure driving the whole first mast to luffing in the assembly method of the circular track crane according to the embodiment of the invention.

Fig. 7 is a schematic diagram of the first luffing structure driving the whole first mast to luffing in the assembly method of the circular rail crane according to the embodiment of the invention.

Fig. 8 is a schematic diagram of a crane boom lifting implementation by using a second luffing system in the method for assembling the circular rail crane according to the embodiment of the invention.

Fig. 9 is a schematic flow chart of an assembly method of a circular rail crane according to an embodiment of the invention.

Fig. 10 is a schematic flow chart of a disassembly method of the circular rail crane according to an embodiment of the invention.

Reference numerals:

1. a platform; 2. a crane boom; 3. a mast system; 4. a support frame system; 5. a counterweight; 6. a track;

31. a first mast; 32. a second mast; 33. a second luffing system; 32a, a first portion; 32b, a second portion;

41. a first support frame; 42. a second support frame; 43. a first luffing system; 44. a driving mechanism.

Detailed Description

The technical scheme provided by the invention is described in more detail below with reference to fig. 1 to 10.

The embodiment of the invention provides a circular track crane which comprises a platform 1, a mast system 3, a crane boom 2 and a support frame system 4. The platform 1 is configured to provide support. The boom 2 is mounted to the platform 1. The mast system 3 is mounted to the platform 1. The mast system 3 is configured to effect boom raising, working and lowering of the boom 2. The support frame system 4 is mounted on the platform 1; the support frame system 4 is configured to enable the mast system 3 to be set up and lowered.

The circular rail crane runs on a circular rail. The maximum hanging weight of the circular rail crane can reach more than 3000 tons. The size of the platform 1 is matched with the size of the track and is positively related to the maximum hoisting weight of the circular rail crane. The bottoms of the two ends of the platform 1 are arranged on the rails and supported by the rails. The top of the platform 1 is used for installing a mast system 3, a crane boom 2 and a support frame system 4. The mast system 3 and the support frame system 4 each comprise a plurality of components, each of which is arranged in a decentralized manner on the platform 1.

Referring to fig. 1, a boom 2 is mounted at one end of a platform 1. The boom frame 2 adopts a truss arm structure, and the truss arm comprises a plurality of arm sections which are detachably connected. Except for the special arm sections of the arm head and the arm tail structures, each arm section in the middle adopts a standard arm section, and the length of the crane boom 2 is changed by changing the number of the standard arm sections, so that the lifting height is changed. Here, in addition to the boom frame 2, the first mast 31, the second mast 32, the first support frame 41, and the second support frame 42 described later may be truss arms. The truss arms are constructed to include identical components including a top section arm, a bottom section arm, and a middle section. However, since the functions of the boom frame 2, the first mast 31, the second mast 32, the first support frame 41, and the second support frame 42 are different, the sizes of the boom sections included in each are different. In the following description, if the main bodies are not identical, different parts are referred to for simplifying the description. For example, the middle section of the first mast 31 and the middle section of the second mast 32 refer to different components.

Referring to fig. 1, a mast system 3 is used to effect luffing operation of the boom 2. In some embodiments, the mast system 3 includes a first mast 31, a second mast 32, and a second luffing system 33. One end of the first mast 31 is mounted at one end of the platform 1; the second mast 32 is mounted at one end to the other end of the platform 1. The other end of the first mast 31 is hinged to the other end of the second mast 32. The second luffing system 33 is installed at the hinge joint of the other end of the first mast 31 and the other end of the second mast 32, and the second luffing system 33 is connected with the crane boom 2 to realize luffing of the crane boom 2.

The first mast 31 is mounted on one end (right end in fig. 1) of the platform 1, and the second mast 32 is mounted on the other end (left end in fig. 1) of the platform 1. The first mast 31 and the second mast 32 form a herringbone structure. The first mast 31, the second mast 32 and the platform 1 together form a substantially triangular stable structure. The mast system 3 comprises one or more sets of first mast 31, second mast 32 and second luffing system 33, each set comprising a first mast 31, a second mast 32 and a second luffing system 33. The sleeves are fixedly connected to form a whole. In other embodiments, the second support frame 42 is part of the arm segment of the second mast 32. The second mast 32 is divided into a first portion 32a and a second portion 32b, depending on whether the first mast 31 is to be assembled or not. The second portion 32b is fixed to the platform 1. The portion of the arm section of the second portion 32b at the bottom also serves as a second support frame 42.

With continued reference to fig. 1, a counterweight 5 is also placed at the other end of the platform 1. The mast system 3 is used for realizing various luffing motions such as boom lifting, boom falling, working and the like of the crane boom 2. The counterweight 5 serves to increase the stability of the boom during luffing. In different hoisting operations, the weight of the counterweight 5 can be increased or decreased and changed, specifically, the weight is set according to the hoisting weight in the actual working condition. The weight of the counterweight 5 is positively correlated with the hanging weight.

With continued reference to fig. 1, in some embodiments, the support frame system 4 includes a first support frame 41, a second support frame 42, and a first horn system 43. One end of the first support 41 is mounted to one end of the platform 1. One end of the second supporting frame 42 is mounted at the other end of the platform 1; the other end of the first supporting frame 41 is hinged with the other end of the second supporting frame 42. The first amplitude changing system 43 is installed at the hinge joint of the other end of the first support frame 41 and the other end of the second support frame 42, and the first amplitude changing system 43 is connected with the mast system 3 to realize amplitude changing of the mast system 3.

The first support frame 41 and the second support frame 42 are truss arms, the weight of the truss arms is very large, the first support frame 41 is mounted at the right end of the platform 1 in fig. 1 at one end, and the second support frame 42 is mounted at the left end of the platform 1 in fig. 1 at the other end. The first support 41 and the second support 42 are each hinged at the other end remote from the platform 1, the first support 41 and the second support 42 generally forming a "herringbone" configuration. The first support frame 41, the second support frame 42 and the platform 1 together form a generally triangular stable structure. The support frame system 4 includes one or more sets of first support frames 41, second support frames 42, and first horn systems 43, each set including one first support frame 41, one second support frame 42, and one first horn system 43. The sleeves are fixedly connected to form a whole.

In some embodiments, the mast system 3 includes the same number of mast loops as the boom system 4 includes. Each boom 2 is provided with a second luffing system 33 and each first mast 31 is provided with a first luffing system 43. In other embodiments, where the mast system 3 includes a different number of mast sleeves than the support frame system 4, the number of first luffing systems 43 may be less than the number of first masts 31, and the same first luffing system 43 may be used to operate a plurality of first masts 31.

For example, taking a lifting capacity of 3000 tons as an example, the lifting capacity of the crane boom 2 is 3000 tons. The weight of the boom 2 is definitely much less than 3000 tons, for example 500 tons; the boom frame 2 can be luffed up with a hoisting capacity of 600 tons to more than 500 tons. The weight of the first mast 31 of the mast system 3 with 600 ton lifting capacity is definitely much smaller than 600 tons, such as the weight of the first mast 31 is 100 tons. The hoisting capacity of the support frame system 4 is 120 tons to meet the luffing requirement of the first mast 31. The supporting frame system 4 with 120 ton lifting capability has light weight of the first supporting frame 41 and the second supporting frame 42, such as only about 15 tons, so that the lifting and the lifting are very easy.

As can be seen from the comparison of the above data, when the first mast 31 is hoisted and disassembled by adopting the prior art, the hoisting capacity of the crane cannot be lower than 100 tons. If the technical scheme provided by the embodiment of the invention is adopted, the adopted auxiliary crane only needs to hoist the first supporting frame 41, and the hoisting capacity of the auxiliary crane is higher than 15 tons. Compared with the prior art, the lifting capacity of the auxiliary crane is reduced by 85%, and the lifting difficulty and the lifting cost are greatly reduced. On the other hand, with such a low weight of the first support frame 41, it is even possible to reduce the length of time for which the auxiliary crane is used, and when the first support frame 41 is lifted to a position where the drive mechanism 44 can act, the drive connection is connected to the platform 1, the subsequent lifting power of the first support frame 41 being provided by the drive mechanism 44. The technical scheme realizes that the requirements on the auxiliary crane in the lifting arm and the falling arm of the first support frame 41 are greatly reduced; after the first support frame 41 and the second support frame 42 are installed in place, the first mast 31 is directly installed by adopting the first amplitude changing system 43, the operation of high-difficulty hoisting and installing hole alignment on the first mast 31 by adopting an auxiliary crane is not needed, and the installation and the disassembly efficiency of the circular track crane are faster and more efficient.

With continued reference to fig. 1, in some embodiments, the support frame system 4 further includes a reinforcement frame (not shown) mounted between the first support frame 41 and the platform 1 to support the first support frame 41. The reinforcing frame adopts truss arm structure, and the quantity of reinforcing frame can be one or more, sets up the reinforcing frame and can reduce cantilever crane effective length to make Euler's critical force obtain promoting, and then promote support frame system 4's bearing capacity, in order to increase the steadiness after the installation of support frame system 4. For specific analysis, see the section of the ring rail crane assembly method described below.

In some embodiments, the support frame system 4 further comprises a drive mechanism 44, the drive mechanism 44 being mounted between the platform 1 and the first support frame 41 to lift and lower the first support frame 41.

In some embodiments, the drive mechanism 44 includes a cylinder. One of the cylinder barrel and the piston rod of the oil cylinder is connected with the platform 1, and the other is connected with the first supporting frame 41. The first support 41 is luffing by extension and retraction of the piston rod.

When the first support 41 is installed, one end of the first support 41 is rotatably connected with the platform 1, so that the second support 42 is connected with the first support 41, and the second support 42 is disconnected with the platform 1. And then extends out of the piston rod of the oil cylinder to jack up the first supporting frame 41. During the jacking process, the first support frame 41 is first lifted by an auxiliary crane. After the first support frame 41 is lifted up in place, the cylinder is connected to the first support frame 41. Of course, the first support frame 41 may be lifted by an oil cylinder without using an auxiliary crane. Then, the second support frame 42 is connected to the platform 1. This completes the installation of the support frame system 4. If no auxiliary crane is used, the whole process is a self-installation process of the support frame system 4. This greatly reduces the number of auxiliary equipment required and increases the ease of installation of the support frame system 4. It is especially suitable for some occasions where auxiliary equipment cannot be used.

When the support frame system 4 is disassembled, the connection between the second support frame 42 and the platform 1 is firstly disconnected, and then the first support frame 41 is put down by adopting an oil cylinder. This allows for self-disassembly of the support frame system 4. This greatly reduces the number of auxiliary equipment required and increases the ease of disassembly of the support frame system 4. It is especially suitable for some occasions where auxiliary equipment cannot be used.

Referring to fig. 2 to 9, the embodiment of the present invention further provides a method for assembling a ring rail crane, which is implemented by adopting the ring rail crane provided by any one of the technical schemes of the present invention, and each step of the method for assembling a ring rail crane is described in detail below.

Step S100, the first support frame 41 of the support frame system 4 is mounted on the platform 1, and the second support frame 42 is connected to the first support frame 41.

In step S100, the second support frame 42 is not connected to the platform 1, i.e., the second support frame 42 is disconnected from the platform 1. Therefore, when the first support frame 41 is lifted subsequently, the second support frame 42 is lifted along with the first support frame 41, and since the first support frame 41 and the second support frame 42 are rotatably connected, after the second support frame 42 is lifted along with the first support frame 41, the second support frame 42 can keep a vertical state under the action of self gravity, so that the second support frame 42 is beneficial to being connected with the platform 1 subsequently.

In some embodiments, the trolley crane further comprises a drive mechanism 44, then in step S100 the drive mechanism 44 is also connected to the first support frame 41. Then the drive mechanism 44 is also lifted along with the first support bar later on, so that no additional crane is required to lift the drive mechanism 44.

Step S110, the first mast 31 is mounted on the platform 1.

Referring to fig. 2, the boom 2 is already in an installed state. The mounting sequence of the boom frame 2 may be performed either before or after step S100, but this is done before the first mast 31 is mounted, which simplifies the subsequent operations. The first mast 31 may also employ truss arms. The truss arm is formed by detachably connecting a plurality of arm sections, and comprises a top section arm, a bottom section arm and a middle section. When the first mast 31 is in the state shown in fig. 1, the arm section located at the top of the first mast 31 is called the top section arm. When the first mast 31 is in the state shown in fig. 1, the arm section at the bottom of the first mast 31 is called the bottom section arm. The arm joint between the top and bottom joint arms is referred to as the middle joint. The middle joint is a standard arm joint. The two adjacent arm sections are hinged at more than two positions, and generally, connecting pins are arranged at four corners of the arm sections, so that the adjacent arm frames can be detachably connected together. The connection of the first mast 31 to the platform 1 is specifically to rotatably connect the bottom knuckle arm of the first mast 31 to the platform 1.

Step S120, the first mast 31 is supported by the boom 2.

The installation of the first mast 31 is completed as shown in fig. 2, the bottom of the first mast 31 is rotatably connected to the platform 1, and the first mast 31 is horizontally placed on the boom 2. The top and bottom knuckle arms of the first mast 31 are both triangular shaped arm knuckles. After the first mast 31 is placed on the boom 2, since it may be difficult for the first mast 31 to completely fit the boom 2, the top section arm of the first mast 31 may be tilted, which may result in too high a subsequent difficulty in installation. In order to improve this phenomenon, in step S120 described above, the following operations are specifically adopted: first, two adjacent sections of the first mast 31 are disconnected away from the hinge point of the boom 2. Of course, it is also possible to choose to break part of the hinge points of the sets of arm segments. This is illustrated in fig. 3 by taking a break as an example. When the first mast 31 is in a state of being supported by the boom 2, part of the hinge points face the boom 2 and the rest of the hinge points face away from the boom 2. Fig. 3 illustrates that the two hinge points of the first mast 31 away from the boom 2 are broken, leaving the two hinge points towards the boom 2. The boom section of the first mast 31, of the two adjacent boom sections, which is oriented towards the bottom boom (i.e. the boom section oriented towards the platform 1) is then fastened to the boom 2And (5) setting. After fixing, the part of the first mast 31 facing the top knuckle boom is brought into abutment with the boom 2, during which part the boom 2 carries the weight of the part of the first mast 31 and provides the force F required to lift this part of the first mast 31 _g The reaction force of (a) also acts on the boom 2. Referring to fig. 4 to 5, according to the moment balance, F _g *L _g ＝F _hcg *L _hcg . Wherein F is _g Refers to the horn force of the first horn system 43. L (L) _g Which refers to the moment arm of the first horn system 43 against which the horn force acts. F (F) _hcg Refers to the tensile force exerted by the second support frame 42, L _hcg Which is referred to as the arm of the tension applied by the second support frame 42. When the total weight of the platform 1 and the components located on the platform 1 is insufficient to provide F _hcg At this time, the partial weight 5 may be installed in advance to be reinforced.

Step S130, mounting the first portion 32a of the second mast 32 to the first mast 31; wherein the second mast 32 comprises a first portion 32a and a second portion 32b that are detachably connected.

Some two intermediate sections of the second mast 32 are separated, and the entire second mast 32 is divided into a first portion 32a and a second portion 32b. The second mast 32 is also assembled section by section from the assembly process of the second mast 32 itself. Therefore, to achieve step S130, when the second mast 32 is assembled directly, it is assembled into two parts: a first portion 32a and a second portion 32b. The top of the first portion 32a is rotatably connected to the top of the first mast 31. The second portion 32b is detachably and fixedly connected to the platform 1, i.e., the operation of step S160 described later. The order of the operations of installing the second portion 32b is not limited, and may be performed after, before, and at the same time as step S130, for example. In step S160, the respective arm segments of the second portion 32b of the second mast 32 are mounted to the platform 1 in a segment-by-segment hoisted manner. When hoisting section by section, the weight of the single arm section of the second mast 32 is very light, thus greatly reducing the hoisting difficulty, avoiding the need of a large auxiliary crane, and completing the installation of the second part 32b of the second mast 32 only with the assistance of a small and medium crane.

Step S140, lifting the first support frame 41 and the second support frame 42 of the support frame system 4 is achieved by lifting the first support frame 41 of the support frame system 4.

In step S140, the first support frame 41 may be lifted by a small auxiliary crane until the first support frame 41 becomes in place. The whole process can be completely realized by adopting a small auxiliary crane, and can also be jointly completed by means of the driving mechanism 44 of the cooperative support frame system 4. Namely, the first support frame 41 is lifted from the position where the first support frame 41 is attached to the platform 1 to the position where the driving mechanism 44 can work, and the amplitude variation in the section is realized by adopting a small auxiliary crane; when the drive mechanism 44 is operative, a subsequent luffing operation of the first support frame 41 is effected by the drive mechanism 44.

Step S150, connecting the second support frame 42 with the platform 1.

During the luffing of the first support frame 41, the second support frame 42 remains rotatably connected to the first support frame 41, so that the second support frame 42 is also lifted. Since the second support frame 42 and the first support frame 41 are rotatably connected, the second support frame 42 is kept in a vertical state under the action of self-gravity after being lifted. When the bottom of the second support frame 42 is almost flush with the top surface of the platform 1, the second support frame 42 is connected to the platform 1. A schematic view of the support frame system 4 in place is shown with reference to fig. 4. In fig. 4, the first support 41 and the second support 42 have an angle β. The angle between the wire of the first luffing system 43 and the first support frame 41 is alpha.

Step S170, the first mast 31 of the mast system 3 is luffing by the first luffing system 43 of the support frame system 4.

The first luffing system 43 adopts components such as winches, steel wire ropes, pulley blocks and the like to realize luffing of the first mast 31. In fig. 5, the first supporting frame 41 and the second supporting frame 42 have an included angle β in comparison with fig. 4 and 5. The angle α' between the wire of the first luffing system 43 and the first support frame 41. Alpha' is greater than alpha. As described above, the first mast 31 is disconnected at the hinge of part of both arm sections, see fig. 3, at a, and at B remains connected. The process of luffing the first mast 31 of the mast system 3 by means of the first luffing system 43 of the support frame system 4 is divided into two processes: the first process is that the first luffing system 43 drives the half luffing amplitude of the top of the first mast 31, and when luffing is carried out to the upper side of the disconnected hinging position of two arm joints of the first mast 31, the arm joint of the first mast 31 fixed with the crane boom 2 is disconnected with the crane boom 2; the two arm sections of the first mast 31 are brought back into fixed connection. The second process is that the first luffing system 43 luffing the entire first mast 31, as shown in fig. 5 and 6. The luffing is continued until the luffing of the first mast 31 is completed, as shown in fig. 7.

The first support frame 41 of the support frame system 4 is mainly subjected to axial pressure during the process of pulling up the first mast 31, and as an axial pressure bearing component, the stability and safety coefficient=euler critical force/axial pressure of the structure thereof, and the calculation formula of the euler critical force F is f=pi EI/L ² . Wherein E is the elastic modulus and I is the section moment of inertia. Boom effective length l=μl. Wherein, the value range of mu is 0.5-2 according to the supporting constraint mode. According to the formula, the effective length of the arm support can be reduced by adding the reinforcing frame, so that the Euler critical force is improved, and the bearing capacity of the support frame system 4 is improved.

Step S180, after the first mast 31 is turned into place, the first portion 32a and the second portion 32b of the second mast 32 are connected. Referring to fig. 7, the first portion 32a and the second portion 32b of the second mast 32 are joined together, and the mast system 3 is assembled.

Step S190, the second luffing system 33 of the mast system 3 is utilized to luffing the crane boom 2 so as to realize the boom lifting of the crane boom 2, as shown in fig. 8. After the second luffing system 33 is adopted to luffing the crane boom 2, the crane boom 2 is started to lift, and preparation is made for subsequent lifting operation of the crane boom 2. The second luffing system 33 adopts components such as a winch, a pulley block, a steel wire rope and the like to realize the lifting and falling of the lifting arm frame 2.

Referring to fig. 10, the embodiment of the invention also provides a method for disassembling the circular rail crane, which is realized by adopting the circular rail crane provided by any technical scheme of the invention. The specific structure of each component mentioned later is referred to the content of the description of each embodiment described above, and will not be repeated here. The steps involved in the disassembly method are described in detail below.

Step S200, dropping the lifting arm support 2 of the circular rail crane. Specifically, the second luffing system 33 is adopted to realize the falling arm of the crane boom 2, and specifically, the falling arm of the crane boom 2 is realized by controlling the retraction and the extension of the steel wire rope of the second luffing system 33.

Step S210, disconnecting the first portion 32a and the second portion 32b of the second mast 32; wherein the second mast 32 comprises a first portion 32a and a second portion 32b that are detachably connected. The second mast 32 is broken into two parts, so that the first part 32a of the second mast 32 can drop along with the drop of the first mast 31, thereby reducing the disassembly hoisting workload of the second mast 32 and improving the disassembly efficiency.

Step S220, the first mast 31 of the mast system 3 is luked by the first luffing system 43 of the support frame system 4 to realize the falling of the first mast 31. After the first mast 31 is dropped, the first portion 32a of the second mast 32 connected to the first mast 31 is also dropped.

Step S230, the second portion 32b of the second mast 32 is detached from the platform 1.

In step S230 described above, the respective arm sections of the second portion 32b of the second mast 32 are disassembled section by section. The weight of hoisting is very light like this, and the hoist and mount degree of difficulty is little, and dismantlement efficiency is high.

After the disassembly of the mast system 3 is completed, the disassembly of the support frame system 4 is performed. It should be noted that the above-mentioned operation sequence of step S230 may be completed before, simultaneously with, or after the disassembly operation of the support frame system 4. The example of the carriage system 4 is first disassembled after the various parts of the mast system 3 are completely disassembled.

Step S240, disconnect the second support frame 42 from the platform 1.

Step S250, through the first support frame 41 of the landing support frame system 4, the first support frame 41 and the second support frame 42 of the landing support frame system 4 are lowered, and the first support frame 41 and the second support frame 42 are disassembled after the landing is in place.

Step S260, the first portion 32a of the second mast 32 is detached from the first mast 31.

Step S270, the first mast 31 is detached from the platform 1.

According to the disassembly method of the circular rail crane, which is provided by the technical scheme, a plurality of large auxiliary cranes for hoisting the whole mast system are not needed in the whole process. According to the technical scheme, the use of the auxiliary crane is reduced, and the specification of the auxiliary crane is reduced; because the number of the auxiliary cranes is small, the occupied space is small, the assembly space is effectively reduced, the specification of the auxiliary cranes is reduced, and the operation economy of the equipment is greatly improved.

In the description of the present invention, it should be understood that the terms "center," "longitudinal," "lateral," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, merely to facilitate description of the present invention and simplify the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the protection of the present invention.

Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention, and are not limiting; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may be modified or some technical features may be replaced with others, which may not depart from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A circular rail crane, comprising:

a platform (1) configured to provide support;

a crane boom (2) mounted on the platform (1);

a mast system (3) mounted to the platform (1); the mast system (3) comprises a first mast (31); -the mast system (3) is configured to implement boom lifting, working and lowering of the boom (2); and

a support frame system (4) mounted to the platform (1); -the support frame system (4) is configured to effect boom raising and boom lowering of the mast system (3);

wherein the support frame system (4) comprises:

a first support frame (41) with one end mounted at one end of the platform (1);

one end of the second supporting frame (42) is arranged at the other end of the platform (1); the other end of the first supporting frame (41) is hinged with the other end of the second supporting frame (42); and

the first amplitude changing system (43) is arranged at the hinge joint of the other end of the first supporting frame (41) and the other end of the second supporting frame (42), and the first amplitude changing system (43) is connected with the mast system (3) to realize amplitude changing of the mast system (3);

wherein the first support frame (41), the second support frame (42) and the first luffing system (43) are all positioned on one side of the first mast (31) away from the crane boom (2).

2. The trolley crane according to claim 1, wherein the support frame system (4) further comprises:

and the reinforcing frame is arranged between the first supporting frame (41) and the platform (1) so as to support the first supporting frame (41).

3. The trolley crane according to claim 2, wherein the support frame system (4) further comprises:

the driving mechanism (44) is arranged between the first supporting frame (41) and the platform (1) so as to lift and lower the first supporting frame (41).

4. A trolley crane according to claim 3, characterized in that the drive mechanism (44) comprises an oil cylinder.

5. The trolley crane according to claim 1, characterized in that the mast system (3) comprises:

the first mast (31) is provided with one end mounted at one end of the platform (1);

a second mast (32) having one end mounted to the other end of the platform (1); the other end of the first mast (31) is hinged with the other end of the second mast (32); and

the second amplitude changing system (33) is arranged at the hinge joint of the other end of the first mast (31) and the other end of the second mast (32), and the second amplitude changing system (33) is connected with the crane boom (2) to realize amplitude changing of the crane boom (2).

6. The trolley crane of claim 5, wherein the number of each of the first mast (31), the second mast (32) and the second luffing system (33) is at least one; the first luffing system (43) is the same or different in number from the first mast (31).

7. The trolley crane according to claim 6, wherein the number of first masts (31) is more than two, each first mast (31) being fixedly connected.

8. The trolley crane of claim 7, wherein the second support frame (42) is part of an arm section of the second mast (32).

9. A method of assembling a ring rail crane, characterized in that it is realized by using a ring rail crane according to any one of claims 1 to 8, said method comprising the steps of:

-mounting a first support (41) of the support system (4) to the platform (1), connecting the second support (42) with the first support (41);

-mounting the first mast (31) to the platform (1);

so that the first mast (31) is supported by the boom (2);

-mounting a first portion (32 a) of the second mast (32) to the first mast (31); wherein the second mast (32) comprises a first portion (32 a) and a second portion (32 b) detachably connected;

lifting the first support frame (41) and the second support frame (42) of the support frame system (4) is achieved by lifting the first support frame (41) of the support frame system (4);

-connecting the second support frame (42) with the platform (1);

-mounting a second portion (32 b) of the second mast (32) to the platform (1);

-luffing a first mast (31) of the mast system (3) with a first luffing system (43) of the support frame system (4);

connecting the first portion (32 a) and the second portion (32 b) of the second mast (32) after the first mast (31) is luffing in place;

and luffing the crane boom (2) by using a second luffing system (33) of the mast system (3) so as to realize the boom lifting of the crane boom (2).

10. The method of assembling a trolley crane according to claim 9, wherein said mounting the second portion (32 b) of the second mast (32) to the platform (1) comprises:

-mounting each arm segment of the second part (32 b) of the second mast (32) to the platform (1) in a segment-by-segment lifting manner.

11. The method of ring rail crane assembly according to claim 9, wherein the causing the first mast (31) to be supported by the crane boom (2) further comprises:

disconnecting two adjacent ones of the first mast (31) from a hinge point of the boom frame (2); wherein the first mast (31) comprises a plurality of arm sections which are connected in sequence, and two adjacent arm sections are hinged at more than two positions; when the first mast (31) is in a state of being supported by the crane boom (2), part of the hinge points face the crane boom (2), and the rest of the hinge points face away from the crane boom (2);

and fixing the arm section, facing the platform (1), of two adjacent arm sections of the first mast (31) with the crane boom (2).

12. A method for dismantling a circular rail crane, characterized in that the method is realized by adopting the circular rail crane as claimed in any one of claims 1 to 8, and comprises the following steps:

dropping a crane boom (2) of the circular rail crane;

disconnecting the first portion (32 a) and the second portion (32 b) of the second mast (32); wherein the second mast (32) comprises a first portion (32 a) and a second portion (32 b) detachably connected;

luffing a first mast (31) of the mast system (3) with a first luffing system (43) of the support frame system (4) to effect boom dropping of the first mast (31);

-detaching a second portion (32 b) of the second mast (32) from the platform (1);

disconnecting the second support frame (42) from the platform (1);

through the first support frame (41) of the support frame system (4), the first support frame (41) and the second support frame (42) of the support frame system (4) are fallen down, and the first support frame (41) and the second support frame (42) are disassembled after the first support frame and the second support frame (42) fall down in place;

-detaching a first portion (32 a) of the second mast (32) from the first mast (31);

the first mast (31) is detached from the platform (1).

13. The method of dismantling a trolley crane according to claim 12, characterized in that said dismantling a second portion (32 b) of the second mast (32) from the platform (1) comprises the steps of:

-dismantling the respective arm sections of the second part (32 b) of the second mast (32) section by section.