High-temperature superheater with pipe clamp fixing function
By using a pipe clamp fixation design in a high-temperature superheater, the combination of mortise and tenon structure and bolt nuts, the problems of loosening and falling off of the sliding pair are solved, the stability and safety of the equipment are improved, and the thermal expansion under high-temperature and high-pressure environments are adapted to the temperature and high-pressure environment. and vibration, achieving efficient, stable and long-life operation of the equipment.
Patent Information
- Application Number
- CN202421164734.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-27
- Publication Date
- 2024-12-31
- Estimated Expiration
- 2034-05-27
AI Technical Summary
The sliding pairs of existing high-temperature superheaters and high-temperature reheaters are prone to loosening or falling off, causing the pipeline to shift or delist, posing safety hazards, and the traditional fixing method is not stable enough in a high-temperature and high-pressure environment, affecting the normal operation and life of the equipment.
The design of high-temperature superheater with pipe clamp fixation is connected through the mortise and tenon structure of the upper and lower devices of the pipe clamp, combined with the fastening method of bolts and nuts, provides stable fixing points, enhances vibration resistance, avoids loosening and falling off, and Adapt to thermal expansion and vibration under high temperature and high pressure conditions.
It effectively avoids loosening and falling off of the sliding pair, improves the operating stability and safety of the equipment, reduces unplanned downtime, improves the overall operating efficiency and reliability of the equipment, and extends the service life of the equipment.
Smart Images
Figure CN222278552U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of fixed pipe clamps, in particular to a high-temperature superheater fixed with a pipe clamp. Background Art
[0002] The sliding pair detachment phenomenon of the high-temperature superheater and high-temperature reheater of the existing power plants of the same type is common, and the number of sliding pair detachments is large. There is a serious impact on the safe and stable operation of the unit due to the tube panel being out of the line. The existing boiler superheater fixed pipe clamp (publication number: CN220601498U) has the following disadvantages and needs further improvement.
[0003] 1. Structural optimization: Sliding pair fixing method During the operation of the unit, due to the flow of high-temperature and high-pressure steam and the vibration caused by it, the sliding pair often becomes loose or falls off. This phenomenon is more obvious under high load and frequent start-stop conditions. The loosening or falling off of the sliding pair will not only cause the tube screen to lose its proper support and limit, causing the pipeline to deviate or be out of the queue, seriously affecting the safety and stable operation of the unit. In addition, since the sliding pair is fixed to the pipeline by welding, the welding point is prone to cracks under long-term high temperature and vibration. Once these cracks are not discovered and handled in time, the cracks will gradually extend to the parent material, which may eventually cause pipeline leakage.
[0004] 2. Pipe clamp fixation: The traditional sliding pair design lacks sufficient flexibility and adaptability, and cannot cope well with the thermal expansion and vibration problems during equipment operation. Since the tube screen will produce a certain amount of thermal expansion under high temperature and high pressure conditions, it will cause uneven force on the fixing point, which will cause the sliding pair to fall off or break. In addition, traditional sliding pair fixing methods mostly use welding or bolt connections. This connection method is prone to loosening or failure under high temperature, high pressure and vibration environments, resulting in insufficient stability and reliability of the sliding pair. This makes the high-temperature superheater and high-temperature reheater have greater uncertainty and safety risks in actual operation, which not only affects the normal operation and life of the equipment, but also increases the difficulty and cost of maintenance. Utility Model Content
[0005] The main purpose of the utility model is to provide a high-temperature superheater with a tube clamp fixation, which can effectively solve the problems in the background technology.
[0006] To achieve the above-mentioned purpose, the technical solution adopted by the utility model is as follows: there is a high-temperature superheater fixed with a pipe clamp, a pipe clamp lower device is installed below the pipe clamp upper device, a bolt is installed above the pipe clamp upper device, a nut is installed below the pipe clamp lower device, a thread is installed below the bolt, a through hole for limiting clamping the pipe is provided between the pipe clamp upper device and the pipe clamp lower device, and mortise and tenon structure devices are installed on both sides of the pipe clamp upper device and the pipe clamp lower device.
[0007] Preferably, a matching groove structure is installed inside the mortise and tenon structure device, and a connecting tenon structure is installed inside the mortise and tenon structure device.
[0008] Preferably, the outer portion of the upper device of the pipe clamp adopts a rounded corner design.
[0009] Preferably, the pipe clamp upper device and the pipe clamp lower device are composed of 14 U-shaped bent pipes.
[0010] Preferably, the outermost pipe diameter of each pipe of the upper pipe clamp device and the lower pipe clamp device is Φ51mm, and the diameter of the remaining pipes is Φ45mm.
[0011] Compared with the prior art, the utility model has the following beneficial effects:
[0012] 1. Structural optimization: The optimized sliding pair fixing method improves the operating stability of the high-temperature superheater and high-temperature reheater by adopting a stable pipe clamp structure. First of all, the new structural design can better cope with the impact of high-temperature and high-pressure steam flow and vibration. The use of pipe clamps effectively avoids the problem of loosening and falling off of the sliding pair, ensuring that the pipe screen can get proper support and limit under various working conditions to prevent the pipeline from shifting or out of the column. It ensures the safe and stable operation of the unit, reduces the unplanned downtime caused by sliding pair problems, and improves the overall operating efficiency of the equipment. In addition, the pipe clamp fixing method is connected by a mortise and tenon structure, which enhances the stability and vibration resistance of the connection.
[0013] 2. Pipe clamp fixation: The pipe clamp can fully adapt to the thermal expansion and vibration changes of the tube panel caused by high temperature and high pressure during the operation of the equipment, avoiding the problem of falling off or breaking caused by uneven force on the fixing points of the traditional sliding pair. The pipe clamp is connected by a mortise and tenon structure, which provides stronger vibration resistance and stability. Under high load and frequent start-stop conditions, it can also ensure the flatness and stability of the tube panel and prevent the pipeline from falling out. In addition, the pipe clamp fixation method does not rely on welding or bolt connections, avoiding the sliding pair problems caused by loosening or failure in high temperature and high pressure environments, and improving the reliability and safety of equipment operation. BRIEF DESCRIPTION OF THE DRAWINGS
[0014] Figure 1 It is a schematic diagram of the overall structure of the utility model;
[0015] Figure 2 It is an exploded view of the mortise and tenon structure device of the utility model.
[0016] In the figure: 1. upper device of the pipe clamp; 2. lower device of the pipe clamp; 3. bolt; 4. nut; 5. thread; 6. limiting through hole of the clamp pipe; 7. mortise and tenon structure device; 8. matching groove structure; 9. connecting tenon structure. DETAILED DESCRIPTION
[0017] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further described below in conjunction with specific implementation methods.
[0018] In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "front end", "rear end", "two ends", "one end", "the other end" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.
[0019] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "provided with", "connected", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.
[0020] Example
[0021] See also Figure 1-2 , the utility model provides a technical solution:
[0022] A high-temperature superheater fixed with a pipe clamp, wherein a pipe clamp lower device 2 is installed below the pipe clamp upper device 1, a bolt 3 is installed above the pipe clamp upper device 1, a nut 4 is installed below the pipe clamp lower device 2, a thread 5 is installed below the bolt 3, a pipe clamping through hole 6 is provided between the pipe clamp upper device 1 and the pipe clamp lower device 2, and mortise and tenon structure devices 7 are installed on both sides of the pipe clamp upper device 1 and the pipe clamp lower device 2.
[0023] The following is a specific implementation of the utility model components:
[0024] 1. The upper device of the pipe clamp: The upper device of the pipe clamp is the upper part of the pipe clamp structure, which is responsible for covering and fixing the upper side of the pipe. It forms a complete clamping structure by cooperating with the lower device of the pipe clamp. This part is fastened by bolts and nuts to ensure stability under high temperature and high pressure conditions.
[0025] 2. The lower device of the pipe clamp: The lower device of the pipe clamp is the lower part of the pipe clamp structure, and works together with the upper device of the pipe clamp to form a clamping fixation for the pipe. The lower device of the pipe clamp is connected to the upper device through bolts and nuts, providing a stable fixing point to prevent the pipe from moving in a high temperature and vibration environment.
[0026] 3. Bolts: Bolts are used to fasten the upper and lower parts of the pipe clamp together. They pass through the through hole of the pipe clamp to firmly connect the upper and lower parts, provide sufficient clamping force, and ensure the stability and safety of the pipeline.
[0027] 4. Nut: The nut is used in conjunction with the bolt to fasten the upper and lower devices of the pipe clamp. By tightening the nut, the clamping force is increased to ensure the stability and reliability of the pipeline in high temperature and vibration environments.
[0028] 5. Thread: The thread is the spiral structure on the bolt, which cooperates with the thread inside the nut to tighten and lock. The existence of the thread enables the bolt and nut to lock each other, providing a stable clamping force to prevent loosening.
[0029] 6. Limit clamp through holes: Limit clamp through holes are holes on the pipe clamp device, which are used to guide and accommodate bolts. Through these through holes, the bolts can smoothly pass through the upper and lower devices of the pipe clamp and cooperate with the nuts to form a stable clamping structure.
[0030] 7. Mortise and tenon structure device: The mortise and tenon structure device is a part of the pipe clamp device. Through the cooperation of the tenon and the mortise, the upper and lower parts are tightly connected. The mortise and tenon structure enhances the vibration resistance and stability of the pipe clamp, ensuring that the pipe clamp can remain stable and will not loosen or shift in high temperature and vibration environments.
[0031] 8. Matching groove structure: The matching groove structure is part of the mortise and tenon structure, and the groove part is used to accommodate and match the convex tenon part. Through this concave-convex matching, the tightness and stability of the pipe clamp connection are enhanced, preventing the pipe clamp from loosening under high temperature and vibration conditions.
[0032] 9. Connecting convex tenon structure: The connecting convex tenon structure is another part of the mortise and tenon structure. The protruding tenon part is used to insert into the matching groove structure to achieve a tight connection between the two parts. The connecting convex tenon structure and the matching groove structure work together to provide strong anti-vibration and anti-shear capabilities, ensuring the stability and safety of the pipe clamp under extreme conditions.
[0033] The following is the specific technical logic implementation method of the innovative point of this utility model:
[0034] 1. Structural optimization: The optimized sliding pair fixing method adopts a stable pipe clamp structure, which improves the operating stability of the high-temperature superheater and high-temperature reheater. The new structural design uses pipe clamps to clamp the pipeline, and the upper and lower devices are fastened with bolts and nuts to ensure that the sliding pair will not loosen or fall off in the high-temperature and high-pressure steam flow and vibration environment. The pipe clamp fixing method uses mortise and tenon structure connection, and the upper and lower devices are respectively provided with tenons and grooves to achieve a tight combination, which enhances the stability and vibration resistance of the connection. The pipe clamp material is selected from ZG0Gr25Ni20 with high temperature resistance, which has excellent mechanical properties and high temperature resistance. It can effectively cope with various working conditions under high temperature and high pressure operating conditions, ensure the safety and stable operation of the unit, reduce unplanned downtime caused by sliding pair problems, and improve the overall operation efficiency of the equipment.
[0035] 2. Pipe clamp fixing: The pipe clamp fixing method can fully adapt to the thermal expansion and vibration changes of the tube panel caused by high temperature and high pressure, and avoid the problem of falling off or breaking caused by uneven force on the fixing points of the traditional sliding pair. The pipe clamp design allows the tube panel to expand and contract under high temperature conditions, and the mortise and tenon structure provides stronger vibration resistance and stability. Under high load and frequent start-stop conditions, the mortise and tenon structure can effectively absorb and disperse vibration energy, ensure the flatness and stability of the tube panel, and prevent the pipeline from being out of the queue. The pipe clamp fixing method achieves a stable connection through the mortise and tenon structure, avoids the problem of sliding pairs caused by looseness or failure, improves the reliability and safety of equipment operation, and thus realizes efficient, stable and long-life operation of the equipment.
[0036] The following is the workflow of this utility model:
[0037] a) Steam Generation: Boilers burn coal or other fuels to heat water and produce high-temperature and high-pressure steam.
[0038] b) Preliminary heating: Steam is first heated by a primary superheater to increase the steam temperature.
[0039] c) High temperature superheater heating: After the initial heating, the steam enters the high temperature superheater, where it is further heated to a higher temperature. The high temperature superheater is composed of multiple sets of U-shaped elbows, which heat the steam by introducing the high temperature flue gas generated by the boiler combustion.
[0040] d) High-temperature reheater heating: The steam heated by the high-temperature superheater enters the high-temperature reheater and is heated again by the high-temperature flue gas to increase the temperature and pressure of the steam. The working principle of the high-temperature reheater is similar to that of the high-temperature superheater, but its function is to reheat the steam that has done some work to restore its energy.
[0041] e) Steam enters the steam turbine: The heated high-temperature and high-pressure steam is sent into the steam turbine, driving the turbine blades to rotate and generate mechanical energy.
[0042] f) Mechanical energy to electrical energy: The rotation of the turbine drives the generator to rotate, converting mechanical energy into electrical energy and completing the power generation process.
[0043] g) Steam cooling and recovery: The steam passing through the turbine is cooled by the condenser, condensed into water, and returned to the boiler for continued recycling.
[0044] The following are the installation steps of this utility model:
[0045] 1. Installation preparation: Check all components to ensure there is no damage or deformation.
[0046] 2. Installation steps:
[0047] a) Install the lower part of the pipe clamp and fix it to the supporting structure.
[0048] b) Place the steam pipe on the lower device of the pipe clamp.
[0049] c) Install the upper device of the pipe clamp and fasten the upper and lower devices with bolts and nuts.
[0050] d) Ensure that the bolts and nuts are tightened in place and check whether the mortise and tenon structure connections are firm.
[0051] 3. Debugging:
[0052] a) After installation is completed, perform a system ventilation test to check whether the pipe clamps are firmly fixed and whether there are any leaks in the pipeline.
[0053] b) Adjust the fixing points to ensure the thermal expansion and vibration adaptability of the pipeline under high temperature and high pressure conditions.
[0054] The material of the pipe clamp is high alloy stainless steel. The chemical composition, mechanical properties and high temperature mechanical properties are summarized as follows:
[0055] chemical composition
[0056]
[0057] Mechanical properties
[0058]
[0059] High temperature mechanical property
[0060]
[0061] The above shows and describes the basic principle and main features of the utility model and the advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only for explaining the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection claimed by the utility model is defined by the attached claims and their equivalents.
Claims
1. A high-temperature superheater with a tube clamp, comprising a tube clamp upper device (1), characterized in that: A lower pipe clamp device (2) is installed below the upper pipe clamp device (1), a bolt (3) is installed above the upper pipe clamp device (1), a nut (4) is installed below the lower pipe clamp device (2), a thread (5) is installed below the bolt (3), a pipe clamping restriction hole (6) is provided between the upper pipe clamp device (1) and the lower pipe clamp device (2), and mortise and tenon structure devices (7) are installed on both sides of the upper pipe clamp device (1) and the lower pipe clamp device (2).
2. A high temperature superheater fixed with a tube clamp according to claim 1, characterized in that: A matching groove structure (8) is installed inside the mortise and tenon structure device (7), and a connecting tenon structure (9) is installed inside the mortise and tenon structure device (7).
3. The high temperature superheater fixed with a tube clamp according to claim 1, characterized in that: The outer portion of the pipe clamp upper device (1) adopts a rounded corner design.
4. The high temperature superheater fixed with a tube clamp according to claim 1, characterized in that: The pipe clamp upper device (1) and the pipe clamp lower device (2) are composed of 14 U-shaped bent pipes.
5. The high temperature superheater fixed with a tube clamp according to claim 1, characterized in that: The outermost pipe diameter of each pipe of the pipe clamp upper device (1) and the pipe clamp lower device (2) is Φ51mm, and the diameters of the remaining pipes are Φ45mm.