Tower type photo-thermal power station high pressure heater shaft center extraction tool

Abstract

The utility model relates to solar energy photo-thermal power generation technical field, and disclose a tower type photo-thermal power station high pressure heater axle core takes out tool, the tool includes: hand wheel and with hand wheel fixed connection's threaded rod, sliding block, threaded rod penetrates sliding block, and with sliding block is through trapezoidal thread cooperation driving connection, the tool still includes: support foot and stainless steel hinge, 4 groups support foot is through stainless steel hinge with sliding block swing joint, the utility model discloses through flexible clamping self -adaptation support structure, realizes the stable support in the narrow space, and avoids the damage effect to the axle core body, thereby comprehensively promotes the efficiency and security of dismounting operation.

Description

Technical Field

[0001] This utility model belongs to the field of solar thermal power generation technology, specifically relating to a tool for removing the shaft of a high-pressure heater in a tower solar thermal power plant. Background Technology

[0002] As a key piece of equipment in the thermal system, the high-pressure heater in a tower-type solar thermal power plant primarily undertakes the heat exchange function between the steam extracted from the turbine and the feedwater. Its operating efficiency directly affects the overall thermal cycle efficiency of the power plant. The shaft component, as the core component for heat transfer within the high-pressure heater, is prone to scaling, corrosion, or mechanical wear under long-term high-temperature and high-pressure operating conditions. Regular disassembly and maintenance are necessary to ensure the safe and stable operation of the equipment.

[0003] Existing methods for removing shaft components primarily rely on traditional tools and manual operation, with typical methods including prying and hydraulic pullers. The prying method uses leverage to apply external force to separate the shaft from the housing; this requires multiple operators working together, first removing external connectors, then inserting the pry bar into the gap between the shaft and housing to gradually apply force. The hydraulic puller method uses a hydraulic cylinder to provide axial pulling force, requiring pre-fixing of the puller bracket and calibration of the force application center point. However, both methods have significant limitations: prying can easily lead to uneven stress on the shaft, causing plastic deformation; hydraulic pullers may leak hydraulic oil under high-temperature conditions due to seal failure; and both methods require temporary support for the equipment body, increasing operational complexity and safety risks.

[0004] Industrial practice data shows that traditional removal methods suffer from the dual technical bottlenecks of low efficiency and high damage rate. Statistics show that the average disassembly time for a single high-pressure heater shaft component exceeds 4 hours, with approximately 30% of the time consumed in tool positioning and force balance adjustment. More seriously, the shaft damage rate caused by traditional methods is as high as 15%, with damage mainly manifesting as surface scratches, sealing surface deformation, and internal stress cracks. This not only increases the cost of spare parts replacement but may also affect the continuous power generation plan of the power plant due to maintenance delays. These technical problems are further amplified in the operation and maintenance scenarios of large-scale concentrated solar power plant clusters, highlighting the urgent need to develop specialized removal tools. Utility Model Content

[0005] To address the shortcomings of existing technologies, this utility model provides a tool for removing the shaft of a high-pressure heater in a tower-type solar thermal power plant. Through a flexible clamping and adaptive support structure, it achieves stable support in a confined space and avoids damage to the shaft body, thereby comprehensively improving the efficiency and safety of disassembly operations.

[0006] To achieve both efficiency and safety in the disassembly operation, this utility model provides the following technical solution: a tool for removing the shaft of a high-pressure heater in a tower solar thermal power plant, the tool comprising: a handwheel and a threaded rod fixedly connected to the handwheel, the handwheel being disposed at one end of the threaded rod;

[0007] The slider has a threaded rod that passes through it and is connected to it via a trapezoidal thread.

[0008] The tool also includes: support feet and stainless steel hinges, with the four sets of support feet being movably connected to the slider via the stainless steel hinges.

[0009] Furthermore, the stainless steel hinge incorporates a disc spring.

[0010] Furthermore, the support foot is equipped with an anti-slip rubber pad.

[0011] Preferably, the anti-slip rubber pad has a thickness of 3-5 mm and a Shore hardness of 60±5HA.

[0012] Preferably, the handwheel is made of HT200 gray cast iron with a knurled surface.

[0013] Preferably, the threaded rod is made of 45# steel through tempering and precision grinding, with an effective stroke of 250mm.

[0014] Preferably, the slider is a 40Cr forging with a fitting accuracy of 7H / 6g with the threaded rod.

[0015] Preferably, the support foot is made of 6061 aluminum alloy profile and has a length of 220mm.

[0016] Compared with the prior art, this utility model provides a tool for removing the shaft of a high-pressure heater in a tower solar thermal power plant, which has the following advantages:

[0017] Firstly, from a technical perspective, the innovatively designed adaptive support structure effectively overcomes the operational limitations of the confined space inside the high-pressure heater. This structure can automatically adjust the support span according to the radial dimension of the shaft assembly, achieving stable clamping of shafts of different specifications. It solves the problem of blind spots in operation caused by space constraints in traditional tools, significantly improving the spatial adaptability and operational flexibility of shaft removal operations.

[0018] Secondly, in terms of economic benefits, by optimizing the work process and reducing consumable consumption, the cost of maintenance per unit of equipment is significantly reduced compared to traditional solutions. This cost optimization mainly stems from the self-adaptive support structure reducing the need for customized special tooling, while the anti-slip support foot design reduces the risk of equipment damage due to operational errors, indirectly reducing the frequency of spare parts replacement and generating considerable economic benefits.

[0019] Thirdly, in terms of safety performance, the integrated anti-slip support feet design increases the coefficient of friction with the inner wall of the equipment, effectively preventing the tool from tipping over or slipping in high-altitude working environments. This safety mechanism ensures the stability of force applied during shaft removal, avoiding damage to equipment components or personnel safety hazards caused by tool instability, and providing reliable safety assurance for the maintenance of high-pressure heaters. Attached Figure Description

[0020] Figure 1 A structural diagram of the tool for removing the shaft of a high-pressure heater in a tower solar thermal power plant.

[0021] Figure 2 A 3D model of the tool for removing the shaft of the high-pressure heater in a tower solar thermal power plant.

[0022] In the diagram: 1. Handwheel; 2. Threaded rod; 3. Slider; 4. Support foot; 5. Stainless steel hinge. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] A tool for removing the shaft of a high-pressure heater in a tower solar thermal power plant includes: a handwheel 1 and a threaded rod 2 fixedly connected to the handwheel 1, wherein the handwheel 1 is disposed at one end of the threaded rod 2;

[0025] The slider 3 is connected to the threaded rod 2 through the slider 3 via a trapezoidal thread.

[0026] The tool also includes: support feet 4 and stainless steel hinges 5, wherein the support feet 4 are movably connected to the slider 3 via 4 sets of stainless steel hinges 5.

[0027] Furthermore, the main frame of the high-pressure heater shaft removal tool for the tower solar thermal power plant is a welded structure of Q235 steel plate, and it has undergone stress-relief annealing treatment to ensure its structural stability and dimensional accuracy. The frame is 380mm high and has a 120mm diameter handwheel mounting seat on top.

[0028] The handwheel 1 is made of HT200 gray cast iron with a diameter of 150mm and a knurled surface to enhance the friction between the hand and the operator. The handwheel 1 is connected to the threaded rod 2 via a flat key.

[0029] The threaded rod 2 is made of 45# steel through quenching and tempering and precision grinding to ensure transmission accuracy and strength. Its diameter is 30mm, thread specification is M30×2, and effective stroke is 250mm.

[0030] The slider 3 is a forging made of 40Cr material, and it is fitted with the threaded rod 2 through a trapezoidal thread with a fitting accuracy of 7H / 6g.

[0031] The stainless steel hinge 5 has a hinge shaft diameter of 8mm and a chrome plating layer thickness of ≥0.01mm. The stainless steel hinge 5 has a built-in disc spring, which can automatically reset the support leg to the unfolded position when not clamped.

[0032] The support foot 4 is made of 6061 aluminum alloy profile, with a length of 220mm and a cross-sectional size of 30×30mm. The bottom is bonded with a 3-5mm thick anti-slip rubber pad with a Shore hardness of 60±5HA.

[0033] During assembly, first ensure that the mounting reference surface of the main frame 6 is flat. Then, install the threaded rod 2 onto the frame via the bearing housing, and check its axial movement and radial runout to ensure they are within the allowable range. The slider 3 is installed in conjunction with the threaded rod 2. Four sets of support feet 4 are connected to the slider 3 via stainless steel hinges 5.

[0034] During operation, use a crane to hoist the tool above the high-pressure heater. Adjust the tool's axis to be ≤0.5mm coaxial with the shaft axis using a laser alignment instrument. Rotate the adjusting nut on support foot 4 to ensure the anti-slip pads of all four support feet are evenly in contact with the equipment flange surface, controlling the preload at 15-20Nm. Turn handwheel 1 clockwise to drive threaded rod 2, causing slider 3 to descend and retract support foot 4 until the buffer pad is in tight contact with the outer circle of the shaft, controlling the clamping force at 30-40kN. Continuously rotate the handwheel at 10-15 revolutions per minute to achieve linear pull-out of the shaft via threaded transmission, controlling the pull-out speed at 5-8mm / min. Once the shaft is completely detached from the housing, use lifting straps to horizontally transfer the shaft to a dedicated storage rack, which should be padded with 30mm thick wooden blocks.

[0035] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0036] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A tool for removing the shaft of a high-pressure heater in a tower-type solar thermal power plant, characterized in that: The tool includes: a handwheel (1) and a threaded rod (2) fixedly connected to the handwheel (1), wherein the handwheel (1) is disposed at one end of the threaded rod (2); The slider (3) is connected to the threaded rod (2) through the slider (3) by means of a trapezoidal thread. The tool also includes: support feet (4) and stainless steel hinges (5), and the four sets of support feet (4) are movably connected to the slider (3) through the stainless steel hinges (5).

2. The tool for removing the shaft of the high-pressure heater in a tower-type solar thermal power plant according to claim 1, characterized in that: The stainless steel hinge (5) has a built-in disc spring.

3. The tool for removing the shaft of the high-pressure heater in a tower-type solar thermal power plant according to claim 1, characterized in that: The support foot (4) is equipped with an anti-slip rubber pad.

4. The tool for removing the shaft of the high-pressure heater in a tower-type solar thermal power plant according to claim 3, characterized in that: The anti-slip rubber pad has a thickness of 3-5mm and a Shore hardness of 60±5HA.

5. The tool for removing the shaft of the high-pressure heater in a tower-type solar thermal power plant according to claim 1, characterized in that: The handwheel (1) is made of HT200 gray cast iron with knurled surface treatment.

6. The tool for removing the shaft of the high-pressure heater in a tower-type solar thermal power plant according to claim 1, characterized in that: The threaded rod (2) is made of 45# steel and has an effective stroke of 250mm.

7. The tool for removing the shaft of the high-pressure heater in a tower-type solar thermal power plant according to claim 1, characterized in that: The slider (3) is a 40Cr forging, and its fit with the threaded rod (2) is 7H / 6g.

8. The tool for removing the shaft of the high-pressure heater in a tower-type solar thermal power plant according to claim 1, characterized in that: The support foot (4) is made of 6061 aluminum alloy profile with a length of 220mm.

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