A mounting system and method for mounting a crane back rod

Abstract

The application provides a mounting system and a mounting method for mounting a crane rear pull rod, the crane comprising a rear girder, a land side upper cross beam connected above the rear girder, and a ladder frame, wherein rear girder node plates are arranged at positions close to adjacent two sides of the ladder frame at a connection position of the rear girder and the land side upper cross beam, land side node plates of the ladder frame are arranged on land sides of the ladder frame, and the mounting system comprises an auxiliary platform and a positioning tool. The auxiliary platform comprises: a first auxiliary platform arranged on a land side of the ladder frame surrounding the land side node plates of the ladder frame and used for assisting in connecting a top of the rear pull rod and the ladder frame; and a second auxiliary platform arranged on a side of the rear girder close to the rear girder node plates and used for assisting in connecting a bottom of the rear pull rod and the rear girder. According to the mounting system and the mounting method provided in the embodiments of the application, safety and construction efficiency can be ensured, and benefits can be considered.

Description

Technical Field

[0001] This invention relates to the field of installation technology for large port machinery, specifically to an installation system and method for installing the rear tie rod of a crane. Background Technology

[0002] The trapezoidal frame rear tie rod of a large port crane is a major component of the port crane's gantry structure. Together with the sea-land side upper crossbeam, rear beam, and trapezoidal frame, it forms a triangular stabilizing structure. While maintaining the stability of the upper structure, it jointly transmits the rated load of the crane trolley to the gantry structure.

[0003] To meet the strength and stiffness requirements of the rear tie rod of the crane's trapezoidal frame while reducing its weight, its cross-sectional shape is typically circular, formed by splicing self-made spiral tubes. The diameter ranges from 1000-1100mm, the length from approximately 30-45 meters, the slenderness ratio is >30, the lifting height is 30-55 meters, the lifting weight range is 10-20t / rod, and the installation angle range is 30°-45° with the horizontal plane. The connection between the rear tie rod and the trapezoidal frame and rear beam is usually welded, requiring high precision in high-altitude on-site positioning and welding.

[0004] During this installation process, rear tie rods with a slenderness ratio greater than 30 are typically lifted from only one point. The tie rods are prone to bending after lifting, and the method of simultaneously inserting them into the rear beam node plate and the trapezoidal frame node plate results in a long installation time and low precision. Furthermore, the entire installation, welding, inspection, and acceptance process requires the assistance of an aerial work platform, which is time-consuming, labor-intensive, and inefficient. Moreover, operating from the aerial work platform poses a significant safety risk to personnel. Summary of the Invention

[0005] In view of this, the present invention provides an installation system for installing the rear tie rod of a crane, which can ensure safety, construction efficiency, and economic benefits.

[0006] The present invention also provides an installation method having the above-described installation system.

[0007] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0008] According to a first aspect of the present invention, an installation system for installing a crane rear tie rod is provided, the crane including a rear main beam, a land-side upper crossbeam connected above the rear main beam, and a trapezoidal frame, wherein the rear main beam and the land-side upper crossbeam are provided with rear main beam node plates on adjacent sides near the trapezoidal frame, and the land side of the trapezoidal frame is provided with trapezoidal frame node plates. The installation system includes an auxiliary platform, the auxiliary platform comprising:

[0009] A first auxiliary platform is located on the land side of the trapezoidal frame surrounding the trapezoidal frame node plate, and is used to assist in the connection between the top of the rear tie rod and the trapezoidal frame;

[0010] The second auxiliary platform is located on the side of the rear beam near the node plate of the rear beam, and is used to assist in the connection between the bottom of the rear tie rod and the rear beam.

[0011] Furthermore, the first auxiliary platform is formed as a "concave" shaped frame structure with plates covering the bottom and the outside and reinforcing ribs surrounding it, and the "concave" shaped frame structure surrounds the trapezoidal frame node plate;

[0012] The inner side of the concave frame structure is equipped with a guardrail to allow operators to measure the installation data of the upper end of the rear tie rod.

[0013] Furthermore, the second auxiliary platform is formed as a rectangular frame structure with an open top and a plate covering the bottom, so that the operator can measure the installation data of the lower end of the rear tie rod.

[0014] Furthermore, the first auxiliary platform includes a pair, and the pair of first auxiliary platforms are respectively disposed at the two land-side ends of the trapezoidal frame surrounding the node plate of the trapezoidal frame;

[0015] The rear beams include a pair, and the second auxiliary platform also includes a pair. The pair of second auxiliary platforms are respectively located on opposite sides of the pair of rear beams near the node plates of the rear beams.

[0016] The trapezoidal frame has one or more hook-shaped wing plates on the land side and the side of the upper crossbeam on the land side near the rear beam node plate. The first auxiliary platform is connected to the land side of the trapezoidal frame at one end, and the second auxiliary platform is connected to the side of the upper crossbeam on the land side near the rear beam node plate at one end. The one or more wing plates have connecting holes formed on them. The wing plates pass through the connecting holes to fix the first auxiliary platform and the second auxiliary platform.

[0017] A support rod is also provided on one side of the rear beam to provide support for the second auxiliary platform.

[0018] Furthermore, the installation system also includes a positioning fixture, which is disposed on the rear beam node plate and the trapezoidal frame node plate to limit the vertical / horizontal position of the rear tie rod.

[0019] Furthermore, the positioning fixture includes multiple fixtures, which are formed in a block shape and are made of magnetic material so that the installation position of the multiple positioning fixtures can be adjusted according to the drawings, thereby adjusting the installation position of the rear pull rod.

[0020] An installation method for mounting a crane rear tie rod according to a second aspect embodiment of the present invention includes an installation system for mounting a crane rear tie rod according to the first aspect embodiment described above, the installation method comprising:

[0021] Step S1: Install the auxiliary platform onto the trapezoidal frame and the rear beam accordingly;

[0022] Step S2: Hoist and install the trapezoidal frame on which the auxiliary platform is located;

[0023] Step S3: Install the rear tie rod to the rear beam node plate and the trapezoidal frame node plate.

[0024] Furthermore, the installation system also includes a positioning fixture, and S1 includes:

[0025] Step S11: Install a pair of the first auxiliary platforms to the landside ends of the trapezoidal frame surrounding the node plate of the trapezoidal frame;

[0026] Step S12: Install a pair of the second auxiliary platforms to both sides of the rear beam near the node plate of the rear beam;

[0027] Step S13: Install multiple positioning fixtures onto the rear beam node plate and the trapezoidal frame node plate respectively.

[0028] Further, step S3 includes:

[0029] Step S31: Install the wind-resistant cable lugs and determine the left and right installation positions of the rear tie rod based on the wind-resistant cable lugs;

[0030] Step S32: Determine the upper and lower installation positions of the rear tie rod based on the dimensions of both ends of the rear tie rod;

[0031] Step S33: Configure one short and one long hoisting wire rope;

[0032] Step S34: Use mobile machinery in conjunction with the hoisting wire rope to slowly raise the rear tie rod until the installation angle of the rear tie rod is greater than the design angle;

[0033] Step S35: Lift the rear tie rod to the installation position and slowly lower the hook. Determine the installation position of the rear tie rod according to the positioning fixture on the rear beam node plate and insert it into the rear beam node plate.

[0034] In step S36, the hook slowly descends, and the installation position of the rear tie rod is determined according to the positioning fixture on the trapezoidal frame node plate and inserted into the trapezoidal frame node plate.

[0035] Furthermore, step S3 also includes: step S37, checking the installation position and stress hole position of the rear tie rod, and welding is performed after confirming that they are correct; step S37 includes:

[0036] Step S371: Measure the distances between the rear tie rod and the two opposite ends of the rear beam node plate on the two opposite sides of the cross section where the rear tie rod is located, and record them as e1 and e2 respectively.

[0037] Step S372: Measure the distances between the rear tie rod and the two opposite ends of the trapezoidal frame node plate on the two opposite sides of the cross section where the tie rod is located, respectively, and record them as f1 and f2.

[0038] Step S373: Adjust the left and right positions of the rear tie rod according to the distances e1, e2, f1, and f2 as described in the drawing;

[0039] Step S374: Measure the diameter difference between the center axis of the rear beam node plate inserted into the bottom stress hole of the rear tie rod and the stress hole, and record it as g1. Measure the diameter difference between the center axis of the trapezoidal frame node plate inserted into the top stress hole of the rear tie rod and the stress hole, and record it as g2. Control the above distances g1 and g2 according to the drawings to adjust the layout of the stress hole positions.

[0040] Step S375: Based on the adjustment of the left and right positions and the adjustment of the position inside the stress hole, the welding and installation of the rear tie rod to the rear beam node plate and the rear tie rod to the trapezoidal frame node plate are carried out respectively.

[0041] The above-described technical solution of the present invention has at least one of the following beneficial effects:

[0042] An installation system for a crane rear tie rod according to an embodiment of the present invention includes an auxiliary platform, comprising a first auxiliary platform and a second auxiliary platform. The first auxiliary platform is located on the land side of the trapezoidal frame surrounding the trapezoidal frame node plate, assisting in the connection between the top of the rear tie rod and the trapezoidal frame. The second auxiliary platform is located on the side of the rear beam near the rear beam node plate, assisting in the connection between the bottom of the rear tie rod and the rear beam. This effectively reduces the difficulty of installation and welding, and the auxiliary platforms can be reused, saving manufacturing costs. During the installation of the crane rear tie rod, safety and construction efficiency are ensured, while also balancing economic benefits.

[0043] Furthermore, the installation system for installing the rear tie rod of a crane according to an embodiment of the present invention also includes a positioning fixture for guiding and positioning the rear tie rod on the main beam node plate and the trapezoidal frame land side node plate, which can effectively ensure the installation accuracy.

[0044] Furthermore, embodiments of the present invention also provide an installation method including the above-described installation system, which further improves the installation accuracy and efficiency of the rear tie rod. Attached Figure Description

[0045] Figure 1(a) is a schematic diagram of the installation arrangement of the first auxiliary platform in the installation system for installing the rear tie rod of a crane according to an embodiment of the present invention; Figure 1(b) is the A-direction view marked in Figure 1(a); and Figure 1(c) is the CC-direction sectional view marked in Figure 1(a).

[0046] Figure 2(a) is a schematic diagram of the installation arrangement of the second auxiliary platform in the installation system of the present invention, Figure 2(b) is the A-direction view marked in Figure 2(a), Figure 2(c) is the B-direction view marked in Figure 2(a), and Figure 2(d) is the C-direction view marked in Figure 2(a).

[0047] Figure 3(a) is a hoisting schematic diagram of the first auxiliary platform in the installation system of the present invention, wherein Figure 3(b) is the view from direction A marked in Figure 3(a);

[0048] Figure 4(a) is a hoisting schematic diagram of the second auxiliary platform in the installation system of the present invention, and Figure 4(b) is an enlarged schematic diagram of point I marked in Figure 4(a);

[0049] Figure 5(a) is a schematic diagram of the installation system after the overall installation is completed according to the embodiment of the present invention. Figure 5(b) is an enlarged schematic diagram of point I marked in Figure 5(a), and Figure 5(c) is an enlarged schematic diagram of point II marked in Figure 5(a).

[0050] Figure 6(a) is a schematic diagram of the left and right installation positions of the tie rod after determining the anti-wind vibration cable ear plate in the installation method of the present invention, and Figure 6(b) is the E-direction view marked in Figure 6(a);

[0051] Figure 7(a) is a schematic diagram of the start of hoisting the tie rod in the installation method of the present invention, and Figure 7(b) is a schematic diagram of the end of hoisting the tie rod in the installation method of the present invention.

[0052] Figures 8(a) to 8(e) This is a detailed process diagram illustrating the use of mobile machinery to hoist the tie rod in the installation method of this invention embodiment;

[0053] Figure 9(a) is a schematic diagram of the inspection before welding of the rear tie rod in the installation method of the present invention. Figure 9(b) is an enlarged schematic diagram of point I marked in Figure 9(a). Figure 9(c) is an enlarged schematic diagram of point II marked in Figure 9(a). Figure 9(d) is a view from direction A marked in Figure 9(b). Figure 9(e) is a view from direction A marked in Figure 9(c).

[0054] Reference numerals: 100. Rear beam; 110. Rear beam node plate; 120. Support rod;

[0055] 200. Landside upper crossbeam;

[0056] 300. Trapezoidal frame; 310. Trapezoidal frame node plate;

[0057] 400. Rear tie rod; 410. Wind-resistant cable lug; 420. Stress hole;

[0058] 500. Auxiliary platform; 510. First auxiliary platform; 511. Guardrail; 520. Second auxiliary platform; 530. Wing plate; 540. Connector;

[0059] 600. Positioning fixture;

[0060] 700. Steel wire rope;

[0061] 800. Mobile machinery;

[0062] 900. Truck crane. Detailed Implementation

[0063] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the described embodiments of the present invention are within the scope of protection of the present invention.

[0064] Unless otherwise defined, the technical or scientific terms used in this invention shall have the ordinary meaning understood by one of ordinary skill in the art to which this invention pertains. The terms "first," "second," and similar terms used in this invention do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Similarly, the terms "an" or "a" and similar terms do not indicate a quantity limitation, but rather indicate the presence of at least one. The terms "connected" or "linked" and similar terms are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. "Up," "down," "left," "right," etc., are used only to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship also changes accordingly.

[0065] The following describes, with reference to the accompanying drawings, a specific installation system and method for installing a crane rear tie rod according to an embodiment of the present invention.

[0066] like Figures 1(a) to 5(a)As shown, according to an embodiment of the present invention, an installation system for installing a crane rear tie rod includes a crane comprising a rear beam 100, a land-side upper crossbeam 200 connected above the rear beam 100, and a trapezoidal frame 300. The rear beam 100 and the land-side upper crossbeam 200 are connected at their respective adjacent sides near the trapezoidal frame 300, with rear beam node plates 110 on the land side of the trapezoidal frame 300. The trapezoidal frame 300 is also provided with trapezoidal frame node plates 310 on its land side. The installation system includes an auxiliary platform 500, comprising a first auxiliary platform 510 and a second auxiliary platform 520. The first auxiliary platform 510 is located on the land side of the trapezoidal frame 300 surrounding the trapezoidal frame node plates 310, and assists in the connection between the top of the rear tie rod 400 and the trapezoidal frame 300. The second auxiliary platform 520 is located on the side of the rear beam 100 near the rear beam node plates 110, and assists in the connection between the bottom of the rear tie rod 400 and the rear beam 100.

[0067] Specifically, refer to Figures 1(a) to 2(d) When installing the crane's rear tie rod 400, the first auxiliary platform 510 can be installed on the land side of the trapezoidal frame 300 surrounding the trapezoidal frame node plate 310. In this way, when the rear tie rod 400 is hoisted and connected to the trapezoidal frame 300, that is, when the top of the rear tie rod 400 is inserted into the trapezoidal frame node plate 310, the operator can stand on the first auxiliary platform 510 to determine the connection position between the trapezoidal frame node plate 310 and the top of the rear tie rod 400 according to the drawings, and promptly measure and adjust the relevant positioning, installation and welding data. This helps to reduce the difficulty of high-altitude on-site positioning, thereby further reducing the installation difficulty and improving work efficiency. Similarly, the second auxiliary platform 520 can be installed on the side of the rear beam 100 near the rear beam node plate 110. This allows operators to stand on the second auxiliary platform 520 to determine the connection position between the rear beam node plate 110 and the bottom of the rear tie rod 400 according to the drawings, and to measure and adjust relevant positioning, installation, and welding data in a timely manner. By setting auxiliary platforms 500 on the crane's trapezoidal frame 300 and the rear beam 100, including the first auxiliary platform 510 and the second auxiliary platform 520, the difficulty of installation and welding is effectively reduced. These platforms are also reusable, saving on manufacturing costs. During the entire installation, welding, inspection, and reporting process of the crane's rear tie rod 400, there is no need to use an aerial work platform, ensuring safety, construction efficiency, and overall profitability.

[0068] In some embodiments of the present invention, reference is made to Figures 1(a) to 1(c) The first auxiliary platform 510 is formed as a concave frame structure with plates covering the bottom and outer sides and reinforcing ribs surrounding it. The concave frame structure surrounds the trapezoidal frame node plate 310. A guardrail 511 is provided on the inner side of the concave frame structure to allow operators to measure the installation data of the upper end of the rear tie rod 400.

[0069] Specifically, during the actual installation of the crane tie rod 400, the trapezoidal frame node plate 310 is usually located in the middle of the "concave" frame structure, and the concave opening is consistent with the trapezoidal frame node plate 310, which allows the operator to easily measure, adjust, observe and provide feedback on the installation connection in a timely manner, and reduce the difficulty of high-altitude installation and welding.

[0070] In addition, the frame structure provides reliable support connections, and the surrounding reinforcing ribs and the bottom and outer covering plates further enhance the structural strength of the first auxiliary platform 510, ensuring its stability during installation. The interior is also equipped with guardrails 511 to reduce the danger of working at height without affecting the operator's movement.

[0071] In some embodiments of the present invention, reference is made to Figures 2(a) to 2(d) The second auxiliary platform 520 is a rectangular frame structure with an open top and a plate covering the bottom, allowing operators to measure the installation data of the lower end of the rear tie rod 400. In other words, as shown in Figure 2(a), the second auxiliary platform 520, located on the side of the rear beam 100 near the rear beam node plate 110, only needs to measure and observe the installation data on the outer side of the rear beam 100. The installation data on the inner side of the rear beam 100 can be measured directly on the other side of the rear beam node plate 110 if needed, since this area is not part of the high-altitude work area. This further saves costs while effectively reducing installation difficulty and improving installation efficiency.

[0072] In some embodiments of the present invention, referring to Figures 1(a) and 2(a), the first auxiliary platform 510 includes a pair, and the pair of first auxiliary platforms 510 are respectively disposed at both ends of the land side of the trapezoidal frame 300 surrounding the trapezoidal frame node plate 310. The rear beam 100 includes a pair, and the second auxiliary platform 520 also includes a pair, and the pair of second auxiliary platforms 520 are correspondingly disposed on opposite sides of the pair of rear beams 100 near the rear beam node plate 110. Referring to Figures 1(b) and 2(b), the landside of the trapezoidal frame 300 and the side of the upper landside crossbeam 200 near the rear beam node plate 110 are respectively provided with one or more hook-shaped wing plates 530. One or more connectors 540 are provided at the end where the first auxiliary platform 510 connects to the landside of the trapezoidal frame 300, and at the end where the second auxiliary platform 520 connects to the side of the upper landside crossbeam 200 near the rear beam node plate 110. Connecting holes are formed on the connecting holes, and the wing plates 530 pass through the connecting holes to fix the first auxiliary platform 510 and the second auxiliary platform 520. Referring to Figure 2(c), a support rod 120 is also provided on one side of the rear beam 100 to provide support for the second auxiliary platform 520.

[0073] It should be noted that the pair of second auxiliary platforms 520 are respectively located on both sides of the rear beam 100 near the rear beam node plate 110. That is, they can be located on the outer side or the inner side, depending on the distribution of the rear beam node plate 110. For example, referring to Figure 2(a), in the embodiment of this application, the rear beam node plate 110 is located on the outer side of the rear beam 100, so the second auxiliary platforms 520 are also located on the outer side of the rear beam 100. On the inner side of the rear beam 100, the choice is made based on the actual situation of the rear beam 100 to install the second auxiliary platforms 520 on both sides. That is, a pair of rear beams 100 may have four second auxiliary platforms 520, or a pair of rear beams 100 may have only two second auxiliary platforms 520. Furthermore, it should be noted that for the hook-shaped wing plates 530 formed on the land side of the trapezoidal frame 300 and both sides of the rear beam 100, after they are matched with the connectors 540 and inserted into the connecting holes, the wing plates 530 and connectors 540 need to be further welded at the connecting hole positions to improve the stability of the structure. Installation is simple, stable, and reliable.

[0074] In some embodiments of the present invention, reference is made to Figures 5(a) to 5(c) The installation system also includes a positioning fixture 600, as shown in Figures 5(b) and 5(c). The positioning fixture 600 is installed on the rear beam node plate 110 and the trapezoidal frame node plate 310 to limit the vertical / horizontal position of the rear tie rod 400. During the installation of the rear tie rod 400, the operator can mark the installation positions of the rear beam node plate 110 and the trapezoidal frame node plate 310 according to the drawings, and place the positioning fixture 600 accordingly on the marked positions to limit the vertical / horizontal position of the rear tie rod 400 when it is connected to the trapezoidal frame 300 and the rear beam 100, respectively. This helps to improve the installation accuracy, avoid errors, and thus improve the reliability and stability of the overall installation system and increase installation efficiency.

[0075] In some embodiments of the present invention, referring to Figures 5(b) and 5(c), the positioning fixture 600 includes a plurality of fixtures, which are formed in a block shape and are made of magnetic material so as to adjust the installation position of the plurality of positioning fixtures 600 according to the drawings, thereby adjusting the installation position of the pull rod 400.

[0076] In other words, because the positioning fixture 600 is block-shaped and made of magnetic material, such as a magnetic positioning guide block, it can easily adhere to the rear beam node plate 110 and the trapezoidal frame node plate 310. Furthermore, the arrangement of multiple positioning fixtures 600 allows operators to install them in different positions according to the drawings to adjust the installation position of the rear tie rod 400. Fine-tuning of the installation position of the rear tie rod 400 can be achieved by moving, adding, or deleting the positioning fixtures 600. To prevent the positioning fixtures 600 from shifting, the operator will mark the corresponding positions on the trapezoidal frame node plate 310 and the rear beam node plate 110 before installation, so that adjustments can be made promptly when needed. In some other embodiments, the magnetic material component inside the positioning fixture 600 can also be equipped with an electromagnetic element, which can adjust the magnetic force of the positioning fixture 600 when energized, thereby allowing adjustment of the magnetic force as needed to guide the installation position of the rear tie rod 400. This improves the flexibility and adjustability of the installation system, and increases the accuracy and adaptability of the installation.

[0077] This invention also provides an installation method for installing a crane rear tie rod, including an installation system for installing a crane rear tie rod according to the above embodiments, the installation method including:

[0078] Step S1: Install the auxiliary platform 500 onto the trapezoidal frame 300 and the rear beam 100 respectively;

[0079] Step S2: Hoist and install the trapezoidal frame 300 with the auxiliary platform 500;

[0080] Step S3: Install the rear tie rod 400 to the rear beam node plate 110 and the trapezoidal frame node plate 310.

[0081] Specifically, the auxiliary platform 500 is first installed onto the trapezoidal frame 300 and the rear beam 100. Then, the trapezoidal frame 300 with the auxiliary platform 500 installed is hoisted. Finally, with the assistance of the operators on the auxiliary platform 500, the rear tie rod 400 is installed onto the rear beam node plate 110 and the trapezoidal frame node plate 310. This simplifies the installation steps, further reduces the installation difficulty, and improves the installation efficiency.

[0082] In some embodiments of the present invention, reference is made to Figures 5(a) to 5(c) The installation system also includes positioning fixture 600, and S1 includes:

[0083] Step S11: Install a pair of first auxiliary platforms 510 to the land side ends of the trapezoidal frame node plate 310 surrounding the trapezoidal frame 300;

[0084] Step S12: Install a pair of second auxiliary platforms 520 to both sides of the rear beam 100 near the rear beam node plate 110;

[0085] Step S13: Install multiple positioning fixtures 600 onto the rear beam node plate 110 and the trapezoidal frame node plate 310 respectively.

[0086] Specifically, as shown in Figure 3(a), in step S11, a truck crane 900 or a gantry crane is used to install the trapezoidal frame ladder platform, pitch pulleys, front tie rod, cantilever crane, etc., and the first auxiliary platform 510 is installed. During this period, as shown in Figure 3(b), the product ladder platform that interferes with the hoisting of the rear tie rod 400 is not installed temporarily. In step S12, as shown in Figure 4, a truck crane 900 or a gantry crane is used to install the second auxiliary platform 520. Steps S13 and S2 are performed sequentially, as shown in Figure 5(a). First, the overall verticality of the trapezoidal frame 300, the verticality of the support pipes on both sides of the trapezoidal frame 300, and the centering of the trapezoidal frame 300 are installed to ensure that they meet the overall assembly quality requirements of the trapezoidal frame 300 and the requirements before the installation of the rear tie rod 400. Then, as shown in Figures 5(b) and 5(c), the positioning fixture 600 is installed on the main beam node plate and the land side node plate of the trapezoidal frame 300. The weight plate of the trapezoidal frame node plate 310 is not installed yet, but will be welded into place after the rear tie rod 400 is installed. That is to say, in addition to installing the first auxiliary platform 510 and the second auxiliary platform 520 to measure the positions of the corresponding rear main beam node plate 110 and trapezoidal frame node plate 310, the positioning fixture 600 also needs to be installed to ensure the guiding positioning of the rear tie rod 400 on the main beam node plate and the land side node plate of the trapezoidal frame 300, and to ensure the left and right positions of the tie rod and the position of the stress hole 420. Through the synergistic effect of the auxiliary platform 500 and the positioning fixture 600, the accuracy of the installation and positioning of the rear tie rod 400 is improved, the installation difficulty is reduced, the installation efficiency is improved, and the stability and reliability of the entire installation system are jointly ensured.

[0087] In some embodiments of the present invention, step S3 includes:

[0088] Step S31: Install the wind-resistant cable lug plate 410 and determine the left and right installation positions of the rear tie rod 400 based on the wind-resistant cable lug plate 410;

[0089] Step S32: Determine the upper and lower installation positions of the rear tie rod 400 based on the dimensions of both ends of the rear tie rod 400;

[0090] Step S33: Configure one short and one long hoisting wire rope 700;

[0091] Step S34: Use mobile machinery 800 in conjunction with hoisting wire rope 700 to slowly raise the rear tie rod 400 until the installation angle of the rear tie rod 400 is greater than the design angle.

[0092] Step S35: Lift the rear tie rod 400 to the installation position and slowly lower the hook. Determine the installation position of the rear tie rod 400 according to the positioning fixture 600 on the rear beam node plate 110 and insert it into the rear beam node plate 110.

[0093] In step S36, the hook slowly descends, and the installation position of the tie rod 400 is determined by the positioning fixture 600 on the trapezoidal frame node plate 310 and inserted into the trapezoidal frame node plate 310.

[0094] Specifically, as shown in Figure 6(b), in step S31, the positions of the rear tie rod 400 of the trapezoidal frame 300 are determined according to the direction of the wind-resistant cable lug plate 410, distinguishing the rear tie rod 400 on the left side facing the sea and the rear tie rod 400 on the right side facing the sea. Then, in step S32, as shown in Figure 6(a), the dimensions of the helical tube end are measured. Specifically, for example, a laser theodolite can be used to mark the center line of the rear tie rod 400 and the support tube of the trapezoidal frame 300 perpendicular to the rear beam 100, and the dimensions of the top and bottom ends of the rear tie rod 400 from the center line of the support tube perpendicular to the rear beam 100 are measured and recorded as A and B, respectively. Similarly, a laser theodolite is used to mark the horizontal line on the upper surface of the rear beam 100, and the dimensions of the bottom and bottom ends of the rear tie rod 400 from the horizontal line on the upper surface of the rear beam 100 are measured and recorded as C and D, respectively. Based on the drawings, compare the differences between A and B, and between C and D, to determine the vertical installation direction of the rear tie rod 400 of the trapezoidal frame 300, avoiding reverse installation. Finally, as shown in Figure 7(a), the installed steel wire ropes 700 are of different lengths, ensuring that the installation angle of the rear tie rod 400 at point a is greater than the design angle. Secondly, as... Figures 8(a) to 8(e) As shown, to ensure the stability of lifting components with a large slenderness ratio, while the rear tie rod 400 is slowly lifted, a mobile mechanical device 800 is used to assist in slowly pushing and lifting the lower end of the tie rod forward, gradually changing the horizontal state of the component to the tilt angle required for installation, as shown in Figure 7(b), that is, the installation angle at point b = the design angle. The installation positioning sequence is as follows: first, position the lower end of the rear tie rod 400 (rear beam node plate 110), and then position the upper end of the rear tie rod 400 (trapezoidal frame node plate 310). Therefore, in this installation process, for rear tie rods 400 with a slenderness ratio > 30, two lifting points are designed for lifting. The rear tie rod 400 is not easily bent after lifting. At the same time, the use of the mobile mechanical device 800 not only ensures installation efficiency and reduces installation difficulty, but also ensures installation accuracy.

[0095] In some embodiments of the present invention, step S3 further includes: step S37, checking the installation position of the tie rod 400 and the position of the stress hole 420, and performing welding after confirming that there are no errors; step S37 includes:

[0096] Step S371: Measure the distances between the rear tie rod 400 on the two opposite sides of the section where the rear beam node plate 110 is located, and between the two opposite ends of the rear beam node plate 110 that are close to the two opposite sides, and record them as e1 and e2 respectively.

[0097] Step S372: Measure the distances between the tie rod 400 on the two opposite sides of the cross section where the trapezoidal frame node plate 310 is located, and between the tie rod 400 and the two opposite ends of the trapezoidal frame node plate 310 that are close to the two opposite sides, and record them as f1 and f2 respectively;

[0098] Step S373: According to the drawings, control the distances e1, e2, f1, and f2 mentioned above to adjust the left and right positions of the rear tie rod 400.

[0099] Step S374: Measure the diameter difference between the center axis of the bottom stress hole 420 of the rear beam node plate 110 after insertion and the stress hole 420, and record it as g1. Measure the diameter difference between the center axis of the top stress hole 420 of the tie rod 400 after insertion of the trapezoidal frame node plate 310, and the stress hole 420, and record it as g2. Control the above distances g1 and g2 according to the drawings to adjust the layout of the stress hole 420.

[0100] In step S375, based on the adjustment of the left and right positions and the adjustment of the position within the stress hole 420, the welding and installation of the rear tie rod 400 to the rear beam node plate 110 and the rear tie rod 400 to the trapezoidal frame node plate 310 are carried out respectively.

[0101] Specifically, such as Figures 9(a) to 9(e) As shown, before final installation and welding, the installation position of the trapezoidal frame rear tie rod 400 should be checked, and the left and right positions of the tie rod and the position of the stress hole 420 should be locally adjusted. After meeting the installation quality requirements of the trapezoidal frame rear tie rod 400, welding should be completed according to the drawing requirements. According to the drawing requirements of this application, e1 should be equal to e2, and f1 should be equal to f2. That is, the welding sides should be as consistent as possible to avoid uneven force affecting the stability of the rear tie rod 400 and causing safety risks. g1 and g2 should be equal to the radius of the stress hole 420 of their respective node plates, which can effectively disperse the stress.

[0102] The above description represents the preferred embodiments of the present invention. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principles of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A method for installing a crane rear tie rod, employing an installation system for installing the crane rear tie rod, the crane comprising a rear main beam, a land-side upper crossbeam connected above the rear main beam, and a trapezoidal frame, wherein, The rear main beam and the landside upper crossbeam are connected at their respective points near the trapezoidal frame, with rear main beam node plates on the adjacent sides. The landside of the trapezoidal frame is provided with trapezoidal frame node plates. The installation system comprises an auxiliary platform and positioning fixtures. The auxiliary platform includes: A first auxiliary platform is located on the land side of the trapezoidal frame surrounding the trapezoidal frame node plate, and is used to assist in the connection between the top of the rear tie rod and the trapezoidal frame; The second auxiliary platform is located on the side of the rear beam near the node plate of the rear beam, and is used to assist in the connection between the bottom of the rear tie rod and the rear beam. The first auxiliary platform includes a pair, and the pair of first auxiliary platforms are respectively disposed at the two land-side ends of the trapezoidal frame surrounding the node plate of the trapezoidal frame; the rear beam includes a pair, and the second auxiliary platform also includes a pair, and the pair of second auxiliary platforms are correspondingly disposed on opposite sides of the pair of rear beams near the node plate of the rear beam; The positioning fixture is disposed on the rear beam node plate and the trapezoidal frame node plate to limit the vertical / horizontal position of the rear tie rod. The positioning fixture comprises multiple components. The installation method includes: Step S1: Install the auxiliary platform onto the trapezoidal frame and the rear beam accordingly; Step S2: Hoist and install the trapezoidal frame on which the auxiliary platform is located; Step S3: Install the rear tie rod to the rear beam node plate and the trapezoidal frame node plate; S1 includes: Step S11: Install a pair of the first auxiliary platforms to the landside ends of the trapezoidal frame surrounding the node plate of the trapezoidal frame; Step S12: Install a pair of the second auxiliary platforms to both sides of the rear beam near the node plate of the rear beam; Step S13: Install multiple positioning fixtures onto the rear beam node plate and the trapezoidal frame node plate respectively; Step S3 includes: Step S31: Install the wind-resistant cable lugs and determine the left and right installation positions of the rear tie rod based on the wind-resistant cable lugs; Step S32: Determine the upper and lower installation positions of the rear tie rod based on the dimensions of both ends of the rear tie rod; Step S33: Configure one short and one long hoisting wire rope; Step S34: Use mobile machinery in conjunction with the hoisting wire rope to slowly raise the rear tie rod until the installation angle of the rear tie rod is greater than the design angle; Step S35: Lift the rear tie rod to the installation position and slowly lower the hook. Determine the installation position of the rear tie rod according to the positioning fixture on the rear beam node plate and insert it into the rear beam node plate. Step S36: The hook slowly descends, and the installation position of the rear tie rod is determined according to the positioning fixture on the trapezoidal frame node plate and inserted into the trapezoidal frame node plate; Step S37: Check the installation position and stress hole position of the rear tie rod, and weld after confirming that they are correct; Step S37 includes: Step S371: Measure the distances between the rear tie rod and the two opposite ends of the rear beam node plate on the two opposite sides of the cross section where the rear tie rod is located, and record them as e1 and e2 respectively. Step S372: Measure the distances between the rear tie rod and the two opposite ends of the trapezoidal frame node plate on the two opposite sides of the cross section where the tie rod is located, respectively, and record them as f1 and f2. Step S373: Adjust the left and right positions of the rear tie rod according to the distances e1, e2, f1, and f2 as described in the drawing; Step S374: Measure the diameter difference between the center axis of the rear beam node plate inserted into the bottom stress hole of the rear tie rod and the stress hole, and record it as g1. Measure the diameter difference between the center axis of the trapezoidal frame node plate inserted into the top stress hole of the rear tie rod and the stress hole, and record it as g2. Control the above distances g1 and g2 according to the drawings to adjust the layout of the stress hole positions. Step S375: Based on the adjustment of the left and right positions and the adjustment of the position inside the stress hole, the welding and installation of the rear tie rod to the rear beam node plate and the rear tie rod to the trapezoidal frame node plate are carried out respectively.

2. The installation method according to claim 1, characterized in that, The first auxiliary platform is formed as a "U"-shaped frame structure with plates covering the bottom and the outside and reinforcing ribs surrounding it. The "U"-shaped frame structure surrounds the trapezoidal frame node plate. The inner side of the "U"-shaped frame structure is equipped with a guardrail to allow operators to measure the installation data of the upper end of the rear tie rod.

3. The installation method according to claim 2, characterized in that, The second auxiliary platform is formed as a rectangular frame structure with an open top and a plate covering the bottom, so that the operator can measure the installation data of the lower end of the rear tie rod.

4. The installation method according to claim 3, characterized in that, The land side of the trapezoidal frame and the side of the upper crossbeam on the land side near the rear beam node plate are respectively provided with one or more hook-shaped wing plates. One or more connectors are provided at the end of the first auxiliary platform connected to the land side of the trapezoidal frame and at the end of the second auxiliary platform connected to the side of the upper crossbeam on the land side near the rear beam node plate. One or more connectors are formed with connecting holes, and the wing plates pass through the connecting holes to fix the first auxiliary platform and the second auxiliary platform. A support rod is also provided on one side of the rear beam to provide support for the second auxiliary platform.

5. The installation method according to claim 1, characterized in that, The multiple positioning fixtures are formed in a block shape and are made of magnetic material so that the installation position of the multiple positioning fixtures can be adjusted according to the drawings, thereby adjusting the installation position of the rear pull rod.

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