A heat surface tube screen hoisting device

Abstract

The application discloses a kind of hoisting equipment technical field, a heated surface tube screen hoisting device, including baffle, the top of baffle is fixed with lifting ring, the reinforcing plate is fixedly connected between the lifting ring and baffle;The bottom of the baffle is uniformly spaced along its axis and is fixed with a plurality of insert plates, each insert plate is provided with a latch hole, the interval distance between adjacent insert plates is 31-33mm, further comprising a cross arm pin shaft threaded through a plurality of latch holes.Compared with the general hoisting operation directly binding steel wire rope on the heated surface tube screen for hoisting, using the design for hoisting operation, it can improve the safety of hoisting construction, while ensuring the stability of hoisting operation, and the stress of multiple insert plates makes the heated surface tube screen less likely to deform.

Description

Technical Field

[0001] This utility model relates to the field of hoisting equipment technology, specifically to a hoisting device for a heated surface tube screen. Background Technology

[0002] In the daily work of thermal power plant construction, the assembly and installation of boiler heating surface equipment is indispensable. This is especially true during the hoisting of equipment such as water-cooled walls, cyclone separators, and wall-mounted superheaters, where the quality of the hoisting of heating surface panels (referred to as tube panels) is paramount. In boilers and industrial equipment, heating surface panels are typically part of a heat exchanger, used to transfer heat generated by combustion to the working fluid (such as water or steam), thereby achieving energy conversion and utilization. They consist of multiple parallel tubes, which are usually fixed to a tube sheet to form a tube panel. Tube panel heating surfaces are mainly used for convective heat transfer, that is, flue gas flows outside the tubes, transferring heat to the working fluid inside the tubes.

[0003] Referring to the prior art CN218145317U - a combined lifting device for hoisting a flexible tube panel of a boiler, it includes a rectangular horizontal base plate and a set of vertical plates forming a "T"-shaped lifting device frame. Each vertical plate of the set of vertical plates is provided with a through hole for a horizontal crossarm pin, and a horizontal crossarm pin is inserted into the through hole. A right-side support sleeve is provided on the horizontal crossarm pin on the right side of the set of vertical plates, and a right annular groove is provided on the outer circumferential side of the right-side support sleeve. A left-side support sleeve is provided on the horizontal crossarm pin on the left side of the set of vertical plates.

[0004] The method of lifting the tube panel upwards using a horizontal crossbeam pin and multiple vertical plates effectively overcomes the defect of easy deformation during the hoisting of flexible tube panels. However, it was found in use that the spacing between the vertical plates is a very important parameter. If the spacing is too large or too small, it will cause uneven compression or tension during the hoisting of the tube panel, resulting in deformation. In addition, the existing technology has low lifting strength and low counterweight of the lifting rings, resulting in low overall stability during the hoisting process. It cannot reduce the swaying and twisting of the tube panel, thereby reducing the risk of deformation. Utility Model Content

[0005] The present invention aims to provide a hoisting device for heated surface tube screens, thereby reducing the risk of tube screen deformation.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] A heating surface tube panel hoisting device includes a baffle, a lifting ring fixedly provided on the top of the baffle, and a reinforcing plate fixedly connected between the lifting ring and the baffle; a plurality of insert plates are fixedly provided at even intervals along the axis of the bottom of the baffle, each insert plate is provided with a pin hole, the interval between adjacent insert plates is 31-33mm, and a crossbeam pin shaft passing through the plurality of pin holes is also included.

[0008] The working principle and beneficial effects of this utility model:

[0009] This application designs multiple insert plates spaced 31-33mm apart. During hoisting, these plates are inserted between adjacent tubes of the tube panel. The crossbeam pins are then inserted into the pin holes. The lifting rings are lifted using hoisting tools, and the crossbeam pins support the tube panel upwards for hoisting. The 31-33mm spacing ensures that the tubes of the tube panel are not subjected to uneven compressive or tensile forces during hoisting, preventing deformation defects. In addition, reinforcing plates are used to strengthen the lateral force, enhancing the hoisting strength of the lifting rings and increasing the overall strength and counterweight of the lifting rings. This design is safe, reliable, and practical, while also ensuring high overall stability during hoisting, reducing the swaying and twisting of the tube panel, thereby lowering the risk of deformation.

[0010] Compared to conventional hoisting operations where steel wire ropes are directly tied to the heated tube panel, this design improves the safety and stability of the hoisting process. The multiple plates share the load, making the tube panel less prone to deformation and ensuring hoisting quality. It also makes hoisting operations on the construction site more standardized, allows for the reuse of hoisting materials, and saves on construction costs.

[0011] In some embodiments, the number of insert plates is 4 to 6. Using 4 to 6 insert plates can effectively support the heated surface tube panel during hoisting, thereby preventing deformation.

[0012] In some embodiments, the reinforcing plate is inclined relative to the axis of the baffle. This optimization strengthens the lifting ring and increases stability during the lifting process.

[0013] In some embodiments, the baffle is provided with locking holes. These locking holes serve to assist the tube panel.

[0014] In some embodiments, the inner diameter of the pin hole is equal to the outer diameter of the crossarm pin.

[0015] In some embodiments, the end of the crossarm pin is threaded with a lock nut. The lock nuts on both sides of the end are used to lock the tube body of the tube panel to prevent loosening during hoisting. Attached Figure Description

[0016] Figure 1 This is a left view of a heating surface tube screen hoisting device according to this application;

[0017] Figure 2 for Figure 1 The main view;

[0018] Figure 3 for Figure 1 Top view;

[0019] Figure 4 This is a structural schematic diagram of a heating surface tube screen hoisting device according to this application during the hoisting of the tube screen. Detailed Implementation

[0020] The following detailed description illustrates the specific implementation method:

[0021] The reference numerals in the accompanying drawings include: insert plate 1, baffle plate 2, reinforcing plate 3, lifting ring 4, pin hole 5, tube panel 6, crossbeam pin 7.

[0022] In the following statements, directional terms such as "left," "right," "up," and "down" are based on the directions shown in the diagram. In practice, if the corresponding structures are changed in the same direction based on the direction while maintaining their relative positions, it will not affect the implementation of the plan.

[0023] Example: A heating surface tube panel hoisting device, such as Figure 1 , Figure 2 and Figure 3 As shown, it includes a baffle 2, a lifting ring 4 is fixedly welded to the top of the baffle 2, and a reinforcing plate 3 is welded between the lifting ring 4 and the baffle 2; four insert plates 1 are evenly spaced along the axis of the bottom of the baffle 2, each insert plate 1 is provided with a pin hole 5, and it also includes a crossbeam pin 7 that passes through the four pin holes 5.

[0024] The lifting eye 4 is made of 20mm Q235B steel plate, and holes are drilled in the lifting eye 4 to facilitate the subsequent shackle of the wire rope; the reinforcing plate 3 is made of 10mm Q235B steel plate, and the lifting eye 4 is reinforced laterally by welding; the baffle 2 is made of 20mm Q235B steel plate, and is combined with the reinforcing plate 3 and the lifting eye 4 by welding; the insert plate 1 is made of 14mm Q235B steel plate, and the spacing between the insert plates 1 is 31-33mm.

[0025] like Figure 4As shown, this application designs four insert plates 1 with a spacing of 31-33mm. During the hoisting process, the four insert plates 1 are respectively inserted between adjacent tubes of the tube panel 6 (hereinafter referred to as the heated surface tube panel). Then, the crossbeam pin 7 is inserted into the four pin holes 5. The lifting ring 4 is lifted by the hoisting tool, and the crossbeam pin 7 supports the tube panel 6 upward for hoisting. The 31-33mm spacing can ensure that the tubes of the tube panel 6 will not be subjected to uneven extrusion or tension during the hoisting, and will not have deformation defects. In addition, the lateral force of the reinforcing plate 3 is used to strengthen the hoisting strength of the lifting ring 4, increase the overall hoisting strength and counterweight of the lifting ring 4, which is safe, reliable and practical. On the other hand, the overall stability during the hoisting process is high, reducing the swaying and twisting of the tube panel 6, thereby reducing the risk of deformation.

[0026] 1. The following experiment was designed for the insertion plates 1 with a spacing of 31-33mm:

[0027] Sample Preparation: Mark the initial state of the tube screen 6 and record the initial geometric parameters (such as curvature and surface flatness) using a laser scanner. Lifting Operation: Use three sets of lifting devices with different spacings for lifting: the lifting height is uniformly 5 meters, the speed is controlled at 0.5 m / s, and each set is repeated 10 times, with a 5-minute rest period after each lifting. Data Acquisition: After each lifting, use a laser scanner to measure the deformation of the tube screen 6 (maximum curvature, local indentation depth); record the force data from the force sensors and analyze the uniformity of load distribution for each insert plate 1. Comparative Analysis: Calculate the mean and standard deviation of deformation for the three sets of experiments and perform analysis of variance (ANOVA). Compare the uniformity of force distribution and evaluate the influence of spacing on support stability. The following data were obtained:

[0028] Experimental group (31–33 mm): Minimal deformation (<1 mm), uniform stress distribution, and no localized stress concentration. Control group 1 (28–30 mm): Due to the excessively small spacing, friction between the insert plate 1 and the pipe body increased, resulting in scratches or localized dents on the surface of the pipe screen 6 (deformation approximately 2–3 mm). Control group 2 (34–36 mm): Excessively large spacing led to insufficient support for the crossarm pin 7, uneven lateral tension on the pipe body, and a significant increase in deformation (>3 mm). The 31–33 mm spacing of the insert plate 1 effectively dispersed the hoisting load, reducing deformation of the pipe screen 6 caused by uneven stress, thus verifying the rationality of the design standard. The control group data showed that deviations from this spacing significantly increased the risk of deformation, supporting the safety and practicality of the original design.

[0029] 2. The following experiment was designed to address the issues of removing and retaining reinforcing plate 3:

[0030] Experimental group: Reinforcing plate 3 was retained; Control group: Reinforcing plate 3 was removed, and the same hoisting operation was performed. The following data were obtained: Experimental group (retaining reinforcing plate 3): The deformation of the lifting ring 4 was small (<0.5mm), the stress distribution was uniform, the sway amplitude was low (<2% displacement), the deformation of the tube screen 6 was stable (<1mm), and there was no local stress concentration. Control group (removing reinforcing plate 3): The stress peak at the connection of the lifting ring 4 increased significantly (exceeding the design value by 20% to 30%), and the deformation increased (1 to 2mm). The sway amplitude of the device increased (>5% displacement), the deformation of the tube screen 6 increased (1.5 to 2.5mm), and after multiple experiments, microcracks or permanent deformation appeared in the weld of the lifting ring 4. Reinforcing plate 3 significantly improved the structural strength and stability of the device by dispersing the connection stress between the lifting ring 4 and the baffle 2. Removing reinforcing plate 3 would lead to local stress concentration, an increased risk of deformation of the lifting ring 4, and a significant increase in the deformation of the tube screen 6, verifying the necessity of the reinforcing plate 3 design.

[0031] All standard parts used in this utility model can be purchased from the market, and irregular parts can be customized according to the description and drawings. The specific connection methods of each part adopt conventional methods such as bolts, rivets, and welding that are mature in the prior art. The machinery, parts and equipment adopt conventional models in the prior art, and the circuit connection adopts conventional connection methods in the prior art, which will not be described in detail here.

Claims

1. A hoisting device for a heated surface tube panel, comprising a baffle plate, wherein a lifting ring is fixedly provided on the top of the baffle plate, characterized in that: A reinforcing plate is fixedly connected between the lifting ring and the baffle; multiple insert plates are fixedly provided at even intervals along the axis of the bottom of the baffle, each insert plate is provided with a pin hole, the interval between adjacent insert plates is 31-33mm, and a crossbeam pin shaft passing through multiple pin holes is also included.

2. The heating surface tube panel hoisting device according to claim 1, characterized in that: The number of inserts is 4 to 6.

3. The heating surface tube panel hoisting device according to claim 2, characterized in that: The reinforcing plate is inclined relative to the axis of the baffle.

4. The heating surface tube panel hoisting device according to claim 3, characterized in that: The baffle is provided with locking holes.

5. The heating surface tube panel hoisting device according to any one of claims 1 to 4, characterized in that: The inner diameter of the pin hole is equal to the outer diameter of the crossbeam pin.

6. The heating surface tube panel hoisting device according to claim 5, characterized in that: The end of the crossarm pin is threaded with a lock nut.

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