Assembly method of ring rail crane and ring rail crane

Abstract

The present invention relates to an assembling method of a ring rail crane and a ring rail crane. Among them, the assembling method of the ring rail crane includes the following steps: horizontally place the boom and the mast on the chassis, with the first end of the boom hinged to the chassis and the second end of the boom suspended, the first end of the mast hinged to the chassis and the second end of the mast suspended; vertically arrange an auxiliary support on the chassis, and the auxiliary support jacks up the steel wire rope connected between the second end of the mast and the second end of the boom; contract the steel wire rope. Since the weight of the boom is greater than the weight of the mast, the second end of the mast rises under the action of the pulling force of the steel wire rope. When the second end of the mast rises to the first height, the steel wire rope disengages from the auxiliary support. When the second end of the mast rises to the second height, the mast hoisting is completed; wherein, the second height is higher than the first height. The present invention adopts the method of self-lifting the mast, eliminating the use of multiple large auxiliary cranes, reducing the disassembly and assembly cost, and improving the disassembly and assembly efficiency.

Description

Technical Field

[0001] The present invention relates to the field of construction machinery, and particularly to an assembling method for a ring rail crane and a ring rail crane. Background Art

[0002] With the continuous optimization and upgrading of the engineering application field, from the construction level, hoisting increasingly emphasizes efficiency and safety. The prefabrication of large components in a modular manner on the ground in advance and the integrated hoisting of petrochemical tanks are increasingly becoming trends. The hoisting construction of continuously emerging super-large and super-heavy devices places greater and more requirements on the capabilities of hoisting machinery; from the technical level, hoisting machinery is becoming increasingly large-scale, which inevitably puts higher requirements on the assembly and disassembly of the entire unit; from the operation level, the large-scale of hoisting machinery will also bring the problem of too high assembly costs. The maximum requirement for the tonnage of auxiliary cranes during the disassembly and assembly of ring rail cranes is the process of lifting the mast and the mast support. Usually, the tonnage of the auxiliary crane required for this process is 2 to 3 times that of the disassembly and assembly process of other components. The use of multiple large auxiliary cranes will result in high disassembly and assembly costs, and at the same time, the use of auxiliary cranes will make the disassembly and assembly efficiency extremely low. When using an auxiliary crane to lift the mast and the mast support, generally a sling is added to the head of the mast, and the center height of the hook is usually dozens of meters. It is relatively difficult to unhook the sling after the mast is in place, and people often need to climb to the head of the support to remove the sling. And there is a certain oblique pull of the auxiliary crane, which has a certain risk in operation. Summary of the Invention

[0003] Some embodiments of the present invention provide an assembling method for a ring rail crane and a ring rail crane, which are used to alleviate the problem of difficult mast lifting.

[0004] In one aspect of the present invention, an assembling method for a ring rail crane is provided, which includes the following steps:

[0005] Horizontally place the boom and the mast on the chassis, and the first end of the boom is hinged to the chassis, the second end of the boom is suspended, the first end of the mast is hinged to the chassis, and the second end of the mast is suspended;

[0006] Vertically arrange an auxiliary support on the chassis, and the auxiliary support upwardly supports a steel wire rope connected between the second end of the mast and the second end of the boom;

[0007] Contract the steel wire rope. Since the weight of the boom is greater than the weight of the mast, the second end of the mast rises under the pulling force of the steel wire rope. When the second end of the mast rises to a first height, the steel wire rope disengages from the auxiliary support. When the second end of the mast rises to a second height, the mast hoisting is completed; wherein, the second height is higher than the first height.

[0008] In some embodiments, the method for assembling a ring rail crane further includes the steps of: before contracting the wire rope, placing the mast support horizontally, connecting the first end of the mast support to the second end of the mast, and leaving the second end of the mast support suspended; when contracting the wire rope to lift the second end of the mast, driving the first end of the mast support to lift by the second end of the mast; when the mast hoisting is completed, the second end of the mast support is located at the top of the chassis, and at this time, connecting the second end of the mast support to the chassis.

[0009] In some embodiments, the method for assembling a ring rail crane further includes the steps of: arranging rollers at the second end of the mast support, during the lifting process of the first end of the mast support, the second end of the mast support moves on the ground through the rollers, and before the second end of the mast support ends moving on the ground and is about to lift upward to the top of the chassis, disconnecting the connection between the second end of the mast support and the rollers.

[0010] In some embodiments, the method for assembling a ring rail crane further includes the steps of: after connecting the second end of the mast support to the chassis, continuing to contract the wire rope, and lifting the second end of the boom under the action of the tension of the wire rope until the second end of the boom is lifted to the height required for the working state.

[0011] In some embodiments, the method for assembling a ring rail crane further includes the steps of: after connecting the second end of the mast support to the chassis, before continuing to contract the wire rope, removing the auxiliary support.

[0012] In one aspect of the present invention, there is provided a ring rail crane configured to implement the above-mentioned method for assembling a ring rail crane, and the ring rail crane includes:

[0013] A chassis;

[0014] A boom, the first end of the boom is rotatably connected to the chassis;

[0015] A mast, the first end of the mast is rotatably connected to the chassis;

[0016] A wire rope connecting the second end of the boom and the second end of the mast; and

[0017] An auxiliary support provided on the chassis, the auxiliary support is configured to support the wire rope when the second end of the mast is to be lifted, and disengage from the wire rope when the second end of the mast is lifted to a first height.

[0018] In some embodiments, the auxiliary support includes:

[0019] A first support, the first end of the first support is connected to the chassis, and the second end of the first support extends upward; and

[0020] The second support, the first end of the second support is connected to the second end of the first support, and the second end of the second support is connected to the boom.

[0021] In some embodiments, the connection between the second support and the boom is close to the first end of the boom.

[0022] In some embodiments, the chassis includes a first mounting portion, the first end of the boom is rotatably connected to the first mounting portion; the first end of the mast is rotatably connected to the first mounting portion; the auxiliary support is connected to the first mounting portion.

[0023] In some embodiments, the ring rail crane further includes a mast support and a roller. The first end of the mast support is connected to the second end of the mast. The roller is configured to be disposed at the second end of the mast support during the lifting process of the second end of the mast. The roller is removed before the second end of the mast support is lifted upward to the top of the chassis after the ground movement ends.

[0024] Based on the above technical solutions, the present invention has at least the following beneficial effects:

[0025] In some embodiments, before the ring rail crane is assembled, the boom and the mast are placed horizontally on the chassis, and the steel wire rope connected between the second end of the mast and the second end of the boom is approximately in a horizontal plane. The steel wire rope is supported by the auxiliary support. The fulcrum formed by the auxiliary support is also the hinge point where the mast is lifted. The hinge point is raised, avoiding the lifting dead angle, and at the same time increasing the lifting lever arm of the mast, so that the pulling force of the required steel wire rope is greatly reduced; and the weight of the boom is greater than the weight of the mast. Therefore, by tightening the luffing steel wire rope, the mast can be lifted. The self-lifting method of the mast of this crane eliminates the use of multiple large auxiliary cranes, reduces the disassembly and assembly cost, and improves the disassembly and assembly efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of this application. The schematic embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation to the present invention. In the drawings:

[0027] Figure 1 It is a schematic diagram of the auxiliary support supporting the steel wire rope before the ring rail crane is assembled according to some embodiments of the present invention;

[0028] Figure 2 It is a schematic diagram of the second end of the mast support moving on the ground through the roller during the assembly process of the ring rail crane according to some embodiments of the present invention;

[0029] Figure 3Schematic diagram before the second end of the mast support is lifted upward to the top of the chassis after the ground movement ends during the assembly process of the ring rail crane according to some embodiments of the present invention;

[0030] Figure 4 Schematic diagram of the second end of the mast support being connected to the chassis during the assembly process of the ring rail crane according to some embodiments of the present invention;

[0031] Figure 5 Schematic diagram of the second end of the boom being lifted to the required height in the working state during the assembly process of the ring rail crane according to some embodiments of the present invention;

[0032] Figure 6 Schematic diagram of the second end of the mast support being connected to the chassis and the second support being replaced by a flexible connecting member during the assembly process of the ring rail crane according to some embodiments of the present invention;

[0033] Figure 7 Schematic diagram of the second end of the boom being lifted to the required height in the working state and the second support being replaced by a flexible connecting member during the assembly process of the ring rail crane according to some embodiments of the present invention;

[0034] Figure 8 Schematic diagram of the second end of the mast support being connected to the chassis, removing the second support, and connecting the first support and the mast through a connecting member during the assembly process of the ring rail crane according to some embodiments of the present invention.

[0035] The reference numerals in the drawings are explained as follows:

[0036] 1 - Chassis;

[0037] 2 - Boom;

[0038] 3 - Mast;

[0039] 4 - Mast support;

[0040] 5 - Steel wire rope;

[0041] 6 - Auxiliary support; 61 - First support; 62 - Second support;

[0042] 7 - Roller;

[0043] 8 - Pulling plate;

[0044] 9 - Pulley block;

[0045] 10 - Connecting member.

[0046] It should be understood that the dimensions of the various parts shown in the drawings are not drawn according to the actual proportional relationship. In addition, the same or similar reference numerals represent the same or similar components. Detailed implementation manners

[0047] Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. The description of the exemplary embodiments is merely illustrative and in no way limits the present invention and its application or use. The present invention can be implemented in many different forms and is not limited to the embodiments described herein. These embodiments are provided to make the present invention thorough and complete, and to fully convey the scope of the present invention to those skilled in the art. It should be noted that: unless otherwise specifically stated, the relative arrangements of components and steps, the composition of materials, numerical expressions, and numerical values set forth in these embodiments should be construed as merely exemplary and not as limitations.

[0048] The terms "first", "second", and similar terms used in the present invention do not denote any order, quantity, or importance, but are merely used to distinguish different parts. Terms such as "comprising" or "including" mean that the elements before the term cover the elements listed after the term, and do not exclude the possibility of also covering other elements. Terms such as "upper", "lower", "left", "right", etc. are only used to indicate relative positional relationships, and when the absolute position of the object being described changes, the relative positional relationship may also change accordingly.

[0049] In the present invention, when it is described that a specific device is located between a first device and a second device, there may or may not be an intermediate device between the specific device and the first device or the second device. When it is described that a specific device is connected to other devices, the specific device may be directly connected to the other devices without an intermediate device, or may not be directly connected to the other devices and have an intermediate device.

[0050] All terms used in the present invention (including technical terms or scientific terms) have the same meaning as understood by those of ordinary skill in the art to which the present invention pertains, unless otherwise specifically defined. It should also be understood that terms defined in a general dictionary, for example, should be construed as having a meaning consistent with their meaning in the context of the relevant art, and should not be interpreted in an idealized or overly formal sense, unless specifically defined as such herein.

[0051] Technologies, methods, and devices known to those of ordinary skill in the relevant art may not be discussed in detail, but where appropriate, the technologies, methods, and devices should be regarded as part of the specification.

[0052] A ring-rail crane is a lifting device installed on a ring track that can perform lifting, luffing, and slewing operations.

[0053] When assembling a ring-rail crane, it is difficult to lift the mast and the mast support. In some related technologies, multiple large auxiliary cranes are used to lift the mast and the mast support, resulting in high disassembly and assembly costs and low disassembly and assembly efficiency of the ring-rail crane.

[0054] Based on this, some embodiments of the present disclosure provide an assembling method for a ring rail crane to alleviate the problems of difficult mast lifting and high disassembly and assembly costs.

[0055] In some embodiments, the assembling method of the ring rail crane includes the following steps:

[0056] Refer to Figure 1 , place the boom 2 and the mast 3 horizontally on the chassis 1, and the first end of the boom 2 is hinged to the chassis 1, the second end of the boom 2 is suspended, the first end of the mast 3 is hinged to the chassis 1, and the second end of the mast 3 is suspended. At this time, the boom 2 and the mast 3 are approximately on the same straight line, the first end of the boom 2 is close to the first end of the mast 3, and the second end of the boom 2 is far from the second end of the mast 3.

[0057] Vertically arrange an auxiliary support 6 on the chassis 1, and the auxiliary support 6 jacks up the steel wire rope 5 connected between the second end of the mast 3 and the second end of the boom 2.

[0058] Refer to Figure 2 and Figure 3 , contract the steel wire rope 5. Since the weight of the boom 2 is greater than the weight of the mast 3, the second end of the mast 3 rises under the pulling force of the steel wire rope 5. When the second end of the mast 3 rises to the first height, the steel wire rope 5 disengages from the auxiliary support 6. When the second end of the mast 3 rises to the second height, the mast 3 is hoisted completely. Refer to Figure 4 . Wherein, the second height is higher than the first height.

[0059] In the above embodiment, before the ring rail crane is assembled, the boom 2 and the mast 3 are placed horizontally on the chassis 1 and are approximately on the same straight line. The steel wire rope 5 connected between the second end of the mast 3 and the second end of the boom 2 is also approximately in the horizontal plane. The steel wire rope 5 is jacked up by the auxiliary support 6. The fulcrum formed by the auxiliary support 6 is also the hinge point where the mast 3 is lifted. The hinge point is raised to avoid the lifting dead angle, and at the same time, the lever arm for lifting the mast 3 is increased, so that the pulling force of the required steel wire rope 5 is greatly reduced. And usually the weight of the boom 2 of the ring rail crane is greater than the weight of the mast 3. Therefore, the mast 3 can be lifted by tightening the luffing steel wire rope 5. The ring rail crane uses the auxiliary support 6 and its own luffing system (steel wire rope and boom 2, etc.) to realize the self-lifting of the mast 3, eliminating the use of multiple large auxiliary cranes, reducing the disassembly and assembly costs, and improving the disassembly and assembly efficiency.

[0060] In some embodiments, the assembling method of the ring rail crane further includes the step: before contracting the steel wire rope 5, place the mast support 4 horizontally, and the first end of the mast support 4 is connected to the second end of the mast 3, and the second end of the mast support 4 is suspended. Refer to Figure 1; When the steel wire rope 5 is contracted to lift the second end of the mast 3, the second end of the mast 3 drives the first end of the mast support 4 to lift. Refer to Figure 2 and Figure 3 ; When the mast 3 is hoisted in place, the second end of the mast support 4 is located at the top of the chassis 1. At this time, the second end of the mast support 4 is connected to the chassis 1. Refer to Figure 4 .

[0061] In some embodiments, the assembly method of the ring rail crane further includes the step of: arranging rollers 7 at the second end of the mast support 4. Refer to Figure 1 ; During the lifting process of the first end of the mast support 4, the second end of the mast support 4 moves on the ground through the rollers 7. Refer to Figure 2 ; Before the second end of the mast support 4 finishes moving on the ground and is about to be lifted upward to the top of the chassis 1. Refer to Figure 3 , disconnect the connection between the second end of the mast support 4 and the rollers 7.

[0062] During the process of lifting the mast 3 and the mast support 4, the second end of the mast support 4 can achieve movement on the ground through the rolling of the rollers 7. The whole process can be carried out without the intervention of an auxiliary crane, saving costs and improving efficiency.

[0063] In some embodiments, the assembly method of the ring rail crane further includes the step of: after connecting the second end of the mast support 4 to the chassis 1, continue to contract the steel wire rope 5, and the second end of the boom 2 is lifted under the pulling force of the steel wire rope 5 until the second end of the boom 2 is lifted to the height required for the working state. Refer to Figure 5 .

[0064] In some embodiments, the assembly method of the ring rail crane further includes the step of: before continuing to contract the steel wire rope 5 after connecting the second end of the mast support 4 to the chassis 1, remove the auxiliary support 6 to avoid interference with the lifting of the boom 2.

[0065] In some embodiments, refer to Figures 1 to 4 , the auxiliary support 6 includes a first support 61 and a second support 62.

[0066] The first end of the first support 61 is connected to the chassis 1, and the second end of the first support 61 extends upward. The first end of the second support 62 is connected to the second end of the first support 61, and the second end of the second support 62 is connected to the boom 2.

[0067] The assembly method of the ring rail crane further includes the step of: after hoisting the mast 3 in place and connecting the second end of the mast support 4 to the chassis 1, remove the second support 62 of the auxiliary support 6, and the first support 61 is connected to the mast 3 through the connecting member 10. Refer to Figure 8 .

[0068] Some embodiments of the present disclosure also provide a ring rail crane configured to implement the assembly method of the above ring rail crane. Refer to Figure 1 , the ring rail crane includes a chassis 1, a boom 2, a mast 3, a wire rope 5, and an auxiliary support 6.

[0069] The first end of the boom 2 is rotatably connected to the chassis 1. The first end of the mast 3 is rotatably connected to the chassis 1. The wire rope 5 connects the second end of the boom 2 and the second end of the mast 3. The auxiliary support 6 is provided on the chassis 1 and is configured to support the wire rope 5 when the second end of the mast 3 is to be lifted and to disengage from the wire rope 5 when the second end of the mast 3 is lifted to a first height. Refer to Figure 3 .

[0070] In some embodiments, refer to Figures 1 to 4 , the auxiliary support 6 includes a first support 61 and a second support 62.

[0071] The first end of the first support 61 is connected to the chassis 1, and the second end of the first support 61 extends upward. The first end of the second support 62 is connected to the second end of the first support 61, and the second end of the second support 62 is connected to the boom 2.

[0072] Both the first support 61 and the second support 62 are rigid supports.

[0073] In some embodiments, the connection between the second support 62 and the boom 2 is close to the first end of the boom 2.

[0074] In other embodiments, refer to Figure 6 and Figure 7 , the auxiliary support 6 includes a first support 61, a flexible connecting member, and a connecting member 10. The first support 61 is a rigid support, and the flexible connecting member can be a soft structure such as a wire rope or a sling. The first end of the first support 61 is connected to the chassis 1, and the second end of the first support 61 extends upward. The first end of the flexible connecting member is connected to the second end of the first support 61, and the second end of the flexible connecting member is connected to the boom 2.

[0075] After the mast 3 is hoisted and the second end of the mast support 4 is connected to the chassis 1, the flexible connecting member does not need to be removed, and the first support 61 is connected to the mast 3 through the connecting member 10. Refer to Figure 8 .

[0076] In some embodiments, the chassis 1 includes a first mounting portion. The first end of the boom 2 is rotatably connected to the first mounting portion; the first end of the mast 3 is rotatably connected to the first mounting portion; the auxiliary support 6 is connected to the first mounting portion.

[0077] In some embodiments, the ring rail crane further includes a mast bracket 4 and rollers 7. The first end of the mast bracket 4 is connected to the second end of the mast 3. The rollers 7 are configured to be disposed at the second end of the mast bracket 4 during the lifting process of the second end of the mast 3 with the first end of the mast bracket 4; and are removed before the second end of the mast bracket 4 finishes moving on the ground and is about to be lifted upward to the top of the chassis 1.

[0078] In other embodiments, the rollers 7 at the second end of the mast bracket 4 can be replaced by an auxiliary crane with a smaller specification to assist the tail sliding forward.

[0079] In some embodiments, the ring rail crane further includes a pull plate 8, a pulley assembly 9 and a hoisting mechanism. The pull plate 8, the pulley assembly 9 and the hoisting mechanism belong to the luffing assembly used in the hoisting process of the ring rail crane. The hoisting mechanism is provided. The connection of the hoisting mechanism, the steel wire rope 5, the pulley assembly 9, the pull plate 8, etc. can be realized by the prior art and will not be elaborated here.

[0080] The hoisting mechanism is disposed on the chassis. The steel wire rope 5 is connected to the hoisting mechanism through the second end of the mast 3, and the steel wire rope 5 is also connected to the pulley assembly 9. The first end of the pull plate 8 is connected to the pulley assembly 9, and the second end of the pull plate 8 is connected to the second end of the boom 2. By contracting the steel wire rope 5 through the hoisting mechanism, the lifting of the mast 3 can be realized for the assembly of the ring rail crane; and the lifting and luffing of the boom 2 can also be realized after the assembly of the ring rail crane is completed.

[0081] The following combines Figures 1 to 7 to describe several key states during the assembly process of the ring rail crane in some embodiments.

[0082] Figure 1 The state shown is before the assembly of the ring rail crane. The boom 2 and the mast 3 are horizontally placed on the chassis 1. The boom 2 and the mast 3 are approximately on the same straight line. The first end of the boom 2 is close to the first end of the mast 3, and the second end of the boom 2 is far from the second end of the mast 3. The steel wire rope 5 connects the second end of the mast 3 and the second end of the boom 2, and the auxiliary bracket 6 supports the steel wire rope 5 upward.

[0083] Figure 2 The state shown is: contracting the steel wire rope 5, the second end of the mast 3 is lifted under the pulling force of the steel wire rope 5. The second end of the mast 3 drives the first end of the mast bracket 4 to lift, and the second end of the mast bracket 4 moves on the ground through the rollers 7. At this time, the steel wire rope 5 has not separated from the auxiliary bracket 6.

[0084] Figure 3The state shown is as follows: Before the second end of the mast support 4 finishes moving on the ground and is about to be lifted upward to the top of the chassis 1, at this time, the connection between the second end of the mast support 4 and the roller 7 can be released. In this state, the steel wire rope 5 is separated from the auxiliary support 6, and the steel wire rope 5 and the tension plate 8 are located on the same straight line.

[0085] Figure 4 The state shown is as follows: After the mast support 4 is separated from the roller 7, the mast 3 has been hoisted, the second end of the mast support 4 is located at the top of the chassis 1, and the second end of the mast support 4 is connected to the chassis 1.

[0086] Figure 5 The state shown is as follows: After the second end of the mast support 4 is connected to the chassis 1, the auxiliary support 6 is removed, and the steel wire rope 5 continues to contract. The second end of the boom 2 rises under the tension of the steel wire rope 5 until the second end of the boom 2 rises to the height required for the working state.

[0087] Figure 6 The state shown is as follows: After the mast support 4 is separated from the roller 7, the mast 3 has been hoisted, the second end of the mast support 4 is located at the top of the chassis 1, and the second end of the mast support 4 is connected to the chassis 1.

[0088] Figure 7 In the state shown, since the boom system starts to be lifted, the auxiliary support 6 will rotate around its hinge point towards the mast 3 until it reaches the closest distance, and the first support 61 is connected to the mast 3 through the connecting piece 10. Refer to Figure 8 .

[0089] Figure 6 and Figure 7 The second support 62 in

[0090] is replaced by a flexible connecting piece and does not need to be removed. If the second support 62 is used, in order to avoid interference with the lifting of the boom 2, the second support 62 needs to be removed. Therefore, by using a flexible connecting piece, the repeated disassembly and assembly of the auxiliary support 6 can be avoided, so that the auxiliary support 6 can be located between the boom and the mast and does not interfere with any components in the working state.

[0091] Based on the above embodiments of the present invention, without explicit negation, the technical features of one embodiment can be beneficially combined with one or more other embodiments.

[0092] Although some specific embodiments of the present invention have been described in detail by way of examples, those skilled in the art should understand that the above examples are only for illustration purposes and not for limiting the scope of the present invention. Those skilled in the art should understand that the above embodiments can be modified or equivalent substitutions can be made to some technical features without departing from the scope and spirit of the present invention. The scope of the present invention is defined by the appended claims.

Claims

1. An assembling method of a ring-rail crane, characterized in that, it includes the following steps: Lay the boom (2) and the mast (3) horizontally on the chassis (1), and the first end of the boom (2) is hinged to the chassis (1), the second end of the boom (2) is suspended, the first end of the mast (3) is hinged to the chassis (1), and the second end of the mast (3) is suspended; Vertically arrange an auxiliary support (6) on the chassis (1), and the auxiliary support (6) supports upward the steel wire rope (5) connected between the second end of the mast (3) and the second end of the boom (2); Contract the steel wire rope (5). Since the weight of the boom (2) is greater than the weight of the mast (3), the second end of the mast (3) rises under the pulling force of the steel wire rope (5). When the second end of the mast (3) rises to the first height, the steel wire rope (5) disengages from the auxiliary support (6). When the second end of the mast (3) rises to the second height, the mast (3) is hoisted completely; wherein, the second height is higher than the first height; It also includes the steps: Before contracting the steel wire rope (5), place the mast support (4) horizontally, and the first end of the mast support (4) is connected to the second end of the mast (3), and the second end of the mast support (4) is suspended; When contracting the steel wire rope (5) to lift the second end of the mast (3), the second end of the mast (3) drives the first end of the mast support (4) to rise; When the mast (3) is hoisted completely, the second end of the mast support (4) is located at the top of the chassis (1), and at this time, connect the second end of the mast support (4) to the chassis (1); After connecting the second end of the mast support (4) to the chassis (1), continue to contract the steel wire rope (5), and the second end of the boom (2) rises under the pulling force of the steel wire rope (5) until the second end of the boom (2) rises to the height required for the working state.

2. The assembling method of the ring-rail crane as claimed in claim 1, characterized in that, it also includes the steps: Set a roller (7) at the second end of the mast support (4). During the rising process of the first end of the mast support (4), the second end of the mast support (4) moves on the ground through the roller (7). Before the second end of the mast support (4) finishes moving on the ground and is about to rise upward to the top of the chassis (1), disconnect the connection between the second end of the mast support (4) and the roller (7).

3. The assembling method of the ring-rail crane as claimed in claim 1, characterized in that, it also includes the step: After connecting the second end of the mast support (4) to the chassis (1) and before continuing to contract the steel wire rope (5), remove the auxiliary support (6).

4. A ring-rail crane, characterized in that, it is configured to implement the assembling method of the ring-rail crane as claimed in claim 1, and the ring-rail crane includes: a chassis (1); a boom (2), the first end of the boom (2) is rotatably connected to the chassis (1); a mast (3), the first end of the mast (3) is rotatably connected to the chassis (1); a steel wire rope (5) connecting the second end of the boom (2) and the second end of the mast (3); and An auxiliary support (6) is provided on the chassis (1). The auxiliary support (6) is configured to support the wire rope (5) when the second end of the mast (3) is to be lifted, and to disengage from the wire rope (5) when the second end of the mast (3) is lifted to a first height.

5. The ring rail crane according to claim 4, characterized in that the auxiliary support (6) comprises: a first support (61), a first end of the first support (61) is connected to the chassis (1), and a second end of the first support (61) extends upward; and a second support (62), a first end of the second support (62) is connected to the second end of the first support (61), and a second end of the second support (62) is connected to the boom (2).

6. The ring rail crane according to claim 5, characterized in that the connection between the second support (62) and the boom (2) is close to the first end of the boom (2).

7. The ring rail crane according to claim 4, characterized in that the chassis (1) comprises a first mounting portion, a first end of the boom (2) is rotatably connected to the first mounting portion; a first end of the mast (3) is rotatably connected to the first mounting portion; and the auxiliary support (6) is connected to the first mounting portion.

8. The ring rail crane according to claim 4, characterized in that it further comprises a mast support (4) and a roller (7). A first end of the mast support (4) is connected to the second end of the mast (3). The roller (7) is configured to be provided at a second end of the mast support (4) during the lifting process of the first end of the mast support (4) along with the second end of the mast (3); and is removed before the second end of the mast support (4) is lifted upward to the top of the chassis (1) after the ground movement is completed.

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