Introduction trolley, introduction system and tower type hoisting equipment

Abstract

The utility model belongs to the technical field of hoisting equipment, and particularly discloses an introduction trolley, an introduction system and tower type hoisting equipment, the introduction trolley comprises a trolley main body and a jacking block, the trolley main body can move between an introduction platform and an introduction space of a climbing frame device, and a vertically through jacking channel is formed in the trolley main body; the jacking channel is arranged corresponding to the position of a main chord member of a to-be-introduced standard knot, the jacking block is movably arranged in the jacking channel in a penetrating mode, the jacking block is used for positioning the main chord member of the to-be-introduced standard knot and jacking the to-be-introduced standard knot upwards after the to-be-introduced standard knot is driven by the trolley body to move to the introduction space, and the to-be-introduced standard knot is introduced through the introduction trolley. The to-be-introduced standard knot can be horizontally fed into the introduction space, interference with the climbing frame can be avoided, and the straight web members can be correspondingly arranged on the introduction surface of the climbing frame, so that the horizontal stress strength of the climbing frame is improved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to hoisting equipment technical field, concretely relates to a kind of introduction trolley, introduction system and tower crane. BACKGROUND

[0002] The standard section of existing tower crane is usually introduced in a downward manner, and the standard section is suspended under the introduction beam by hoisting equipment and then hoisted into the climbing frame. To facilitate the entry and exit of the standard section, the introduction surface of the climbing frame is designed in an open form. Since the introduction surface lacks straight web members, the climbing frame cannot withstand a large horizontal force. Therefore, this introduction method is not suitable for tower cranes such as tower belt machines, which require the top to withstand a large torque and horizontal force. SUMMARY

[0003] To overcome the above-mentioned defects or shortcomings, the utility model provides an introduction trolley, an introduction system and a tower crane, aiming to solve the technical problem of poor horizontal stress intensity of the climbing frame caused by the existing standard section introduction method.

[0004] To achieve the above-mentioned purpose, the utility model provides an introduction trolley in the first aspect, wherein the introduction trolley includes a trolley body and a top block. The trolley body can move between the introduction platform and the introduction space of the climbing frame device, and a vertical through lifting channel is formed in the trolley body, corresponding to the position of the main chord of the standard section to be introduced. The top block is movably arranged in the lifting channel, and the top block is used to position the main chord of the standard section to be introduced and to lift the standard section to be introduced upward after the trolley body moves the standard section to be introduced to the introduction space.

[0005] In the embodiment of the utility model, the top block includes a top block column and an abutment plate. The top block column is movably arranged in the lifting channel, and the abutment plate is arranged on the lateral side of the top block column. The upper end of the top block column protrudes from the abutment plate and forms a positioning portion, which can be embedded in the main chord. The lower side of the abutment plate can abut against the circumference of the lifting channel, and the upper side of the abutment plate is used to support the main chord of the standard section to be introduced.

[0006] In the embodiment of the utility model, the positioning portion includes a first positioning segment and a second positioning segment arranged in sequence from top to bottom. The orthogonal projection of the cross section of the first positioning segment falls within the cross section of the second positioning segment, so that a stepped surface is formed on the lateral side of the positioning portion and arranged upward.

[0007] In the embodiment of the utility model, a guide rod is arranged on the trolley body, and a guide hole is formed in the abutment plate for the guide rod to pass through.

[0008] In the embodiment of the utility model, the abutting side plate comprises an abutting part and two guide parts, the abutting part is fixedly arranged around the circumferential side of the top block column body, and is used for supporting the main chord of the standard knot to be introduced, the two guide parts are sequentially and intervally arranged from the side of the abutting part outward, and guide holes are formed on the two guide parts.

[0009] In the embodiment of the utility model, the first guide block and the second guide block are further arranged on the trolley body, the first guide block and the second guide block are located on the outer side of the abutting side plate and respectively form the first guide surface and the second guide surface one by one, and the first guide surface and the second guide surface are arranged in a downward direction and inclinedly extend towards the abutting side plate, so as to guide the two side surfaces of the main chord arranged outward.

[0010] In the embodiment of the utility model, the top of the top block is provided with a pull ring.

[0011] In order to achieve the above-mentioned target, the utility model provides a second aspect of an introduction system, wherein the introduction system comprises an introduction platform, an introduction rail, a driving device and the above-mentioned introduction trolley, the introduction platform is horizontally arranged on the climbing frame, the introduction rail is arranged on the introduction platform and extends into the introduction space, and the driving device is arranged on the introduction platform and is used for driving the trolley body to move along the introduction rail between the introduction platform and the introduction space.

[0012] In the embodiment of the utility model, the two ends of the introduction rail are respectively provided with a first pulley block and a second pulley block, the driving device comprises a winding drum mechanism and a traction rope, the traction rope is wound on the winding drum mechanism and forms a first traction end and a second traction end arranged in opposite directions, the first traction end is connected to one end of the trolley body, the second traction end sequentially passes through the first pulley block and the second pulley block and is connected to the other end of the trolley body, and the winding drum mechanism is rotatably arranged.

[0013] In the embodiment of the utility model, the introduction system further comprises a pull rod assembly, the pull rod assembly comprises a first pull rod, a second pull rod and a length adjusting piece, the first end of the first pull rod is connected to the climbing frame, the first end of the second pull rod is connected to the introduction platform, the length adjusting piece has a first threaded section and a second threaded section with opposite rotation directions, the first threaded section is threadedly connected to the second end of the first pull rod, and the second threaded section is threadedly connected to the second end of the second pull rod.

[0014] In order to achieve the above-mentioned target, the utility model provides a third aspect of a tower crane, which comprises a tower crane body, a climbing frame and the above-mentioned introduction system, the climbing frame is arranged on the tower crane body, and the upper end of the introduction surface of the climbing frame is provided with a straight web member connected to the two main chords.

[0015] Through the above technical scheme, the introduction trolley provided by the embodiment of the utility model has the following beneficial effects:

[0016] When the above-mentioned introducing trolley is used, since the trolley body and the jacking block are included, when the tower crane performs the adding section operation, the standard section to be introduced is placed on the trolley body through the hoisting equipment, then the trolley body enters the introducing space from the introducing platform of the climbing frame device, then the jacking block is driven to move upward along the jacking channel through the jacking equipment to lift the standard section to be introduced, after the standard section to be introduced is butt-jointed with the upper standard section, the jacking equipment and the jacking block are lowered to reset, and the trolley body exits from the introducing space to the introducing platform, then through the introducing trolley, the standard section to be introduced can be horizontally sent into the introducing space, and the upper end of the standard section does not need to be connected with the hoisting equipment, so that the climbing frame is not interfered, and the introducing surface of the climbing frame can be correspondingly provided with the straight web member to improve the horizontal stress strength.

[0017] Other features and advantages of the present application will be described in detail in the following specific embodiments. BRIEF DESCRIPTION OF DRAWINGS

[0018] The accompanying drawings are included to provide a further understanding of the present application, and constitute a part of the specification, and are used together with the following detailed description to explain the present application, but do not constitute a limitation on the present application. In the drawings:

[0019] Figure 1 is a structural schematic view of the introducing trolley in the embodiment of the present application;

[0020] Figure 2 is a structural schematic view of the jacking block in the embodiment of the present application;

[0021] Figure 3 is a cooperation schematic view of the jacking block and the main chord in the embodiment of the present application;

[0022] Figure 4 is a structural schematic view of the splicing frame in the embodiment of the present application;

[0023] Figure 5 is Figure 4 is a local enlarged view of A in FIG. 5;

[0024] Figure 6 is a structural schematic view of the introducing system in the embodiment of the present application;

[0025] Figure 7 is Figure 6 is a local enlarged view of B in FIG. 6;

[0026] Figure 8 is a side view of the introducing system in the embodiment of the present application;

[0027] Figure 9 is a partial structural schematic view of the tower crane in the embodiment of the present application.

[0028] Legend

[0029] 1 trolley main body 11 guide rod

[0030] 12 first guide block 121 first guide surface

[0031] 13 second guide block 131 second guide surface

[0032] 14 jacking channel 15 splicing frame

[0033] 16 hook 17 roller

[0034] 2 top block 21 top block column

[0035] 211 positioning portion 212 first positioning section

[0036] 213 second positioning section 22 abutting edge plate

[0037] 221 abutting portion 222 guide portion

[0038] 223 guide hole 23 pull ring

[0039] 3 lead-in platform 4 lead-in rail

[0040] 41 first pulley set 42 second pulley set

[0041] 5 drive device 51 winding drum mechanism

[0042] 52 traction rope 6 pull rod assembly

[0043] 61 first pull rod 62 second pull rod

[0044] 63 length adjusting member 7 climbing frame

[0045] 71 straight web 8 standard section to be led in DETAILED DESCRIPTION

[0046] The specific embodiments of the utility model will be described in detail below in combination with the drawings. It should be understood that the specific embodiments described herein are only used to illustrate and explain the utility model, and are not used to limit the utility model.

[0047] The lead-in trolley, lead-in system and tower crane of the utility model are described below with reference to the drawings.

[0048] As Figures 1 to 3 shown, the utility model provides a kind of lead-in trolley, comprising:

[0049] The trolley body 1 is movable between the introduction platform 3 of the climbing frame device and the introduction space, and a vertical lifting channel 14 is formed in the trolley body 1 and is arranged in position corresponding to the main chord of the standard section 8 to be introduced;

[0050] The top block 2 is movably arranged in the lifting channel 14 and is used for positioning the main chord of the standard section 8 to be introduced and lifting the standard section 8 to be introduced upward after the trolley body 1 drives the standard section 8 to be introduced to move to the introduction space.

[0051] When the introduction trolley is used, the trolley body 1 and the top block 2 are included, when the tower crane performs the section adding operation, the standard section 8 to be introduced is placed on the trolley body 1 by the hoisting equipment, then the trolley body 1 enters the introduction space from the introduction platform 3 of the climbing frame device, then the lifting cylinder of the tower crane equipment is retracted, the standard section of the tower body on the lower side of the climbing frame device contacts and lifts the top block 2, the top block 2 lifts the standard section 8 to be introduced to separate from the trolley body 1 and contact the transition section on the upper side of the climbing frame device, so as to facilitate the pin shaft connection of the standard section 8 to be introduced and the transition section, after the connection of the standard section 8 to be introduced and the transition section is completed, the lifting cylinder is lifted, the top block 2 loses the thrust of the standard section on the lower side and is reset in the lifting channel 14, and the trolley body 1 exits from the introduction space to the introduction platform 3, so that the introduction trolley can horizontally send the standard section 8 to be introduced to the introduction space, the upper end of the standard section does not need to be connected to the hoisting equipment, and therefore does not interfere with the climbing frame 7, and the introduction surface of the climbing frame 7 can be correspondingly provided with the straight web 71 to improve the horizontal stress strength.

[0052] In addition, the introduction trolley separates the trolley body 1 and the top block 2, the lifting equipment only needs to drive the top block 2 during the lifting operation, and the trolley body 1 can remain stationary, which can ensure that the trolley body 1 always travels on the set path and facilitate the arrangement of the driving device 5 of the trolley body 1.

[0053] Specifically, the standard section is a tenon type standard section and has four main chords, and therefore four lifting channels 14 are formed in the trolley body 1, and the top block 2 is arranged in each lifting channel 14, and of course, if the standard section is provided in other shapes, the number and position of the lifting channels 14 can be adjusted correspondingly.

[0054] Specifically, referring to Figure 1 and Figure 4 The trolley body 1 is composed of two identical spliced frames 15, which is convenient for production and manufacturing, and the far side of the two spliced frames 15 is provided with a roller 17 to facilitate the movement of the trolley body 1.

[0055] It should be noted that the introduced trolley provided by the utility model can be used for performing the adding and reducing operations, the reducing operation process is the reverse operation of the adding operation process, and therefore the adding operation process will not be described herein.

[0056] As shown in Figure 2 and Figure 3 In the embodiment of the utility model, the top block 2 includes a top block cylinder 21 and an abutting side plate 22, the top block cylinder 21 is movably arranged in the jacking channel 14, the abutting side plate 22 is arranged on the circumferential side of the top block cylinder 21, the upper end of the top block cylinder 21 is arranged out of the abutting side plate 22 and is formed with a positioning part 211, the positioning part 211 can be embedded in the main chord rod, the lower side of the abutting side plate 22 can abut against the circumference of the jacking channel 14, and the upper side of the abutting side plate 22 is used for supporting the main chord rod of the standard section to be introduced 8. The top block cylinder 21 is used for abutting against the lower standard section, and the positioning part 211 ensures that the standard section to be introduced 8 can be accurately placed in the set position, so that the standard section to be introduced 8 can be accurately aligned with the upper and lower standard sections in the subsequent adding process, and the abutting side plate 22 is used for jacking and driving the standard section to be introduced 8.

[0057] As shown in Figure 2 In the embodiment of the utility model, the positioning part 211 includes a first positioning section 212 and a second positioning section 213 arranged in sequence from top to bottom, the orthogonal projection of the cross section of the first positioning section 212 falls into the cross section of the second positioning section 213, so that a stepped surface arranged upward is formed on the circumferential side of the positioning part 211. Because the size of the first positioning section 212 is smaller, the standard section to be introduced 8 can be rapidly and preliminarily positioned in the process of being placed on the trolley body, and then the standard section to be introduced 8 is moved along the stepped surface, so that the second positioning section 213 is embedded in the main chord rod of the standard section to be introduced 8, and accurate positioning is realized. Specifically, the cross section shape of the positioning part 211 is determined according to the shape of the main chord rod, and can be rectangular or circular.

[0058] As shown in Figures 1 to 3 In the embodiment of the utility model, the trolley body 1 is provided with a guide rod 11, and the abutting side plate 22 is provided with a guide hole 223 for the guide rod 11. The movement of the top block 2 can be guided by arranging the guide rod 11, and the top block 2 vertically moves along the guide rod 11 in the descending process, so that the top block cylinder 21 can be accurately arranged in the jacking channel 14.

[0059] Of course, the utility model is not limited to this, and in other embodiments, the height of the top block cylinder 21 can also be increased, so that a part of the top block cylinder 21 is always arranged in the jacking channel 14 in the jacking process, and the movement of the top block 2 can also be guided.

[0060] As shown in Figure 2As shown in the utility model embodiment, the abutting side plate 22 comprises an abutting portion 221 and two guide portions 222, the abutting portion 221 is fixedly arranged around the circumferential side of the top block cylinder 21 to support the main chord of the standard section 8 to be introduced, and the two guide portions 222 are sequentially and spacedly arranged from the side of the abutting portion 221 facing outward, and a guide hole 223 is formed on each of the two guide portions 222.

[0061] Specifically, referring to Figure 1 , the side of the abutting portion 221 facing outward refers to the side opposite to the two top blocks 2 spaced along the width direction of the trolley body 1, and each guide portion 222 is provided with a guide rod 11, and the guide rods 11 on the two sides of the trolley body 1 are arranged side by side along the length direction of the trolley body 1 to facilitate the placement of the standard section 8 to be introduced. Then, by arranging the two guide portions 222, the lifting of the top block 2 can be further limited to avoid the deviation of the top block 2, and the guide portion 222 is arranged on the side of the abutting portion 221 away from the standard section 8 to be introduced, which can avoid interference with the introduction of the standard section. Of course, the guide portion 222 can also be arranged at other positions of the abutting portion 221 without affecting the placement of the standard section 8 to be introduced.

[0062] As shown in Figure 5 , in the utility model embodiment, the trolley body 1 is further provided with a first guide block 12 and a second guide block 13, the first guide block 12 and the second guide block 13 are located on the outer side of the abutting side plate 22 and are respectively provided with a first guide surface 121 and a second guide surface 131, and the first guide surface 121 and the second guide surface 131 are arranged to be inclined and extended towards the abutting side plate 22 in the direction from top to bottom to guide the two side surfaces of the main chord arranged outward. The function of the guide block is to guide the main chord of the standard section 8 to be introduced to align the main chord with the top block 2, and the first guide surface 121 and the second guide surface 131 limit the main chord from two directions to further improve the work efficiency.

[0063] As shown in Figure 2 , in the utility model embodiment, the top of the top block 2 is provided with a pull ring 23, which can be used for the operation personnel to transfer and transport the top block 2.

[0064] As shown in Figure 6 and Figure 8 , in order to achieve the above-mentioned object, the utility model provides a second aspect of an introduction system, wherein the introduction system comprises an introduction platform 3, an introduction track 4, a driving device 5 and the above-mentioned introduction trolley, the introduction platform 3 is horizontally arranged from the climbing frame 7, the introduction track 4 is arranged on the introduction platform 3 and extends into the introduction space, and the driving device 5 is arranged on the introduction platform 3 and is used to drive the trolley body 1 to move along the introduction track 4 between the introduction platform 3 and the introduction space.

[0065] Specifically, the lead-in rail 4 includes a first rail part and a second rail part, the first rail part is arranged on the lead-in platform 3, and the second rail part is arranged in the lead-in space; opposite sides of the first rail part and the second rail part are provided with connecting holes, and the first rail part and the second rail part can be connected through bolts.

[0066] As shown in Figure 6 the embodiment of the utility model, the both ends of the lead-in rail 4 are respectively provided with the first pulley block 41 and the second pulley block 42, the driving device 5 includes the reel mechanism 51 and the traction rope 52, the traction rope 52 is wound on the reel mechanism 51, and the first traction end and the second traction end are reversely arranged; the first traction end is connected with one end of the trolley body 1, the second traction end sequentially passes through the first pulley block 41 and the second pulley block 42 and is connected with the other end of the trolley body 1, and the reel mechanism 51 is rotatably arranged. Then, through the reel mechanism 51 and the pulley block, the horizontal driving of the trolley body 1 can be realized, the pulley block and the traction rope 52 are arranged on the side of the lead-in platform 3, and the occupied space is small.

[0067] Specifically, referring to Figure 8 , the first pulley block 41 is arranged at the end of the lead-in rail 4 away from the climbing frame 7, the second pulley block 42 is arranged at the end of the lead-in rail 4 extending into the lead-in space, and the reel mechanism 51 is arranged close to the first pulley block 41 to be away from the climbing frame 7, so that the space on one side of the climbing frame 7 is wider, and the installation or disassembly work of the operator is facilitated; hooks 16 are arranged on the front and rear sides of the trolley body 1 for connecting the traction rope 52.

[0068] As shown in Figure 6 and Figure 7 the embodiment of the utility model, the lead-in system further includes the pull rod assembly 6, the pull rod assembly 6 includes the first pull rod 61, the second pull rod 62 and the length adjusting part 63, the first end of the first pull rod 61 is connected with the climbing frame 7, the first end of the second pull rod 62 is connected with the lead-in platform 3, the length adjusting part 63 has the first threaded section and the second threaded section with opposite rotation directions, the first threaded section is threadedly connected with the second end of the first pull rod 61, and the second threaded section is threadedly connected with the second end of the second pull rod 62. The pull rod assembly 6 is used for supporting the lead-in platform 3, avoiding that a large torque is generated at the connection between the lead-in platform 3 and the climbing frame 7, and through screwing the length adjusting part 63, the overall length of the pull rod assembly 6 can be changed to compensate for the manufacturing and installation errors, so that the pull rod assembly 6 is in a tension state, and effective support for the lead-in platform 3 is realized.

[0069] Specifically, the operation process of the lead-in system is as follows:

[0070] The lead-in special hook is connected with the standard section to be led in through the steel wire rope, the main hook of the tower crane hooks the lead-in special hook, the standard section is lifted and placed on the trolley body 1, and the lead-in special hook is removed.

[0071] The drum mechanism 51 drives to pull the trolley body 1 and the standard section to be introduced into the introduction space of the climbing frame 7;

[0072] The jacking cylinder driving the climbing frame 7 retracts, and the climbing frame 7, the transition section, the trolley body 1 and the standard section to be introduced are lowered until the head of the tower body standard section is in contact with the top block of the trolley body;

[0073] The jacking cylinder continues to retract, the head of the tower body standard section passes through the jacking channel 14 of the trolley body 1, the top block 2 is lifted, and the top block 2 drives the standard section to be introduced to gradually separate from the trolley body 1 until the head of the standard section to be introduced is in complete contact with the bottom of the transition section, and the connecting pin shaft of the transition section and the standard section to be introduced is installed on the operation platform;

[0074] The jacking cylinder jacks, and the climbing frame 7, the transition section, the trolley body 1 and the standard section to be introduced are lifted, the head of the tower body standard section exits the jacking channel 14 of the trolley body 1, and the top block 2 falls back to the trolley body 1 along the head of the tower body standard section;

[0075] At this time, the standard section to be introduced is suspended on the bottom of the transition section, the drum mechanism 51 is reversely driven to withdraw the trolley body 1 from the tower body;

[0076] Finally, the jacking cylinder retracts, the bottom of the standard section to be introduced is in complete contact with the head of the tower body standard section, the connecting pin shaft of the bottom of the standard section to be introduced and the head of the tower body standard section is installed on the operation platform, and the adding of the standard section is successfully completed.

[0077] As Figure 9 shown, in order to achieve the above object, the utility model provides a tower crane, which comprises a tower crane body, a climbing frame and an introduction system as described above. The climbing frame is arranged on the tower crane body, and the upper end of the introduction surface of the climbing frame is provided with straight web members connected with the main chord bars on both sides. Since the tower crane adopts all the technical solutions of the above embodiment, it has at least the beneficial effects described above, which will not be described again.

[0078] In the description of the utility model, it should be understood that the terms "first" and "second" are only used for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features limited by "first" and "second" can explicitly or implicitly include at least one of the features. In the description of the utility model, the meaning of "multiple" is at least two, such as two, three, etc., unless otherwise specifically limited.

[0079] In the utility model, unless another definite provision and limitation, the term " install " " link " " connect " " fixed " and so on term should do broad sense understanding, for example, can be fixed connection, also can be detachable connection, or be integrated;Can be mechanical connection, also can be electric connection or each other can communicate;Can be direct connection, also can pass through intermediate medium indirectly connect, can be two element internal communication or two element's interaction relationship, unless another definite limitation.For ordinary skilled person in the art, can understand the concrete meaning of above-mentioned term in the utility model according to specific circumstances.

[0080] In the description of the present specification, the description of the terms "one embodiment", "some embodiments", "example", "specific example" or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In the present specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. Furthermore, the skilled in the art can combine and combine the different embodiments or examples described in the present specification and the features of the different embodiments or examples without contradiction.

[0081] Although the embodiments of the present application have been shown and described above, it is understood that the above embodiments are exemplary and cannot be understood as limiting the present application, and the skilled in the art can change, modify, replace and modify the above embodiments within the scope of the present application.

Claims

1. A lead-in cart, characterized by, The introduction trolley comprises: A trolley body (1) which is movable between an introduction platform (3) and an introduction space of a climbing frame device, and a vertical lifting channel (14) is formed in the trolley body (1) and is arranged in position corresponding to a main chord of a standard segment (8) to be introduced; A top block (2) which is movably arranged in the lifting channel (14) and is used for positioning the main chord of the standard segment (8) to be introduced and lifting the standard segment (8) to be introduced upward after the trolley body (1) moves the standard segment (8) to be introduced to the introduction space.

2. The lead-in cart of claim 1, wherein, The top block (2) comprises a top block column (21) and an abutting side plate (22), the top block column (21) is movably arranged in the lifting channel (14), the abutting side plate (22) is arranged on the periphery of the top block column (21), the upper end of the top block column (21) extends out of the abutting side plate (22) and is formed with a positioning portion (211) which is embedded in the main chord, the lower side of the abutting side plate (22) is abutted with the periphery of the lifting channel (14), and the upper side of the abutting side plate (22) is used for supporting the main chord of the standard segment (8) to be introduced.

3. The lead-in cart of claim 2, wherein, The positioning portion (211) comprises a first positioning section (212) and a second positioning section (213) which are arranged in sequence from top to bottom, the orthogonal projection of the cross section of the first positioning section (212) falls within the cross section of the second positioning section (213), and a stepped surface which is arranged upward is formed on the periphery of the positioning portion (211).

4. The lead-in cart of claim 2, wherein, A guide rod (11) is arranged on the trolley body (1), and a guide hole (223) is formed in the abutting side plate (22) for the guide rod (11) to pass through.

5. The lead-in cart of claim 4, wherein, The abutting side plate (22) comprises an abutting portion (221) and two guide portions (222), the abutting portion (221) is fixedly arranged around the periphery of the top block column (21) and is used for supporting the main chord of the standard segment (8) to be introduced, the two guide portions (222) are sequentially and spacedly arranged outward from one side of the abutting portion (221), and the guide hole (223) is formed in each of the two guide portions (222).

6. The lead-in cart of claim 2, wherein, A first guide block (12) and a second guide block (13) are further arranged on the trolley body (1), the first guide block (12) and the second guide block (13) are located outside the abutting side plate (22) and are respectively and one-to-one formed with a first guide surface (121) and a second guide surface (131), the first guide surface (121) and the second guide surface (131) are arranged in an upwardly inclined manner to the abutting side plate (22) and are used for guiding two side surfaces of the main chord arranged outward; And / or, a pull ring (23) is arranged on the top of the top block (2).

7. An introduction system characterized by comprising: The introduction system comprises an introduction platform (3), an introduction rail (4), a driving device (5), and the introduction trolley according to any one of claims 1 to 6, the introduction platform (3) is horizontally arranged from a climbing frame (7), the introduction rail (4) is arranged on the introduction platform (3) and extends into the introduction space, and the driving device (5) is arranged on the introduction platform (3) and is used to drive the trolley body (1) to move along the introduction rail (4) between the introduction platform (3) and the introduction space.

8. The introduction system of claim 7, wherein, The introduction rail (4) is provided with a first pulley block (41) and a second pulley block (42) at two ends respectively, the driving device (5) comprises a winding drum mechanism (51) and a traction rope (52), the traction rope (52) is wound on the winding drum mechanism (51) and is formed with a first traction end and a second traction end arranged in opposite directions, the first traction end is connected to one end of the trolley body (1), the second traction end is sequentially wound around the first pulley block (41) and the second pulley block (42) and is connected to the other end of the trolley body (1), and the winding drum mechanism (51) is rotatably arranged.

9. The introduction system of claim 7, wherein, The introduction system further comprises a pull rod assembly (6), the pull rod assembly (6) comprises a first pull rod (61), a second pull rod (62), and a length adjusting piece (63), a first end of the first pull rod (61) is connected to the climbing frame (7), a first end of the second pull rod (62) is connected to the introduction platform (3), the length adjusting piece (63) has a first threaded section and a second threaded section with opposite rotation directions, the first threaded section is threadedly connected to a second end of the first pull rod (61), and the second threaded section is threadedly connected to a second end of the second pull rod (62).

10. A tower crane, characterized in that The tower crane device comprises a tower crane body, a climbing frame (7), and the introduction system according to any one of claims 7 to 9, the climbing frame (7) is arranged on the tower crane body, and a straight web (71) connected to main chord rods on both sides is arranged at an upper end of an introduction surface of the climbing frame (7).

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