Energy absorption and vibration suppression device for small pipe outside turbine furnace of thermal power plant and pipeline system outside turbine furnace
By setting up elastic components on the outer peripheral wall side of the small pipe outside the furnace of the thermal power plant, kinetic energy is absorbed and converted into elastic potential energy, the problem of large vibration amplitude of the small pipe outside the furnace is solved, and the effect of reducing vibration and reducing stress concentration is achieved.
Patent Information
- Application Number
- CN202420515044.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-03-15
- Publication Date
- 2025-02-18
- Estimated Expiration
- 2034-03-15
AI Technical Summary
During operation, due to the unreasonable design of the support and lifting points in the thermal power plant, the vibration amplitude is large, causing pipeline stress concentration and increasing safety hazards.
An energy absorption and vibration suppression device is designed, and by providing an elastic component, such as a spring or rubber pad, on the outer peripheral wall side of the small tube outside the furnace, the elastic deformation of the elastic component absorbs kinetic energy and converts it into elastic potential energy, thereby suppressing pipeline vibration.
Without increasing the constraint degree, the vibration amplitude of the small pipes outside the furnace is effectively reduced, the pipeline stress concentration is reduced, and safe operation performance is improved.
Smart Images
Figure CN222503118U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of thermal power plant pipelines, and in particular to an energy absorbing and vibration suppressing device for small pipes outside the boiler of a thermal power plant, and also to a pipeline system outside the boiler. Background Art
[0002] The external pipes of thermal power plants mainly include four major pipes, namely the main water supply pipe, the main steam pipe, the high-temperature reheat steam pipe and the low-temperature reheat pipe. In addition, they also include small pipes outside the machine and boiler, such as the temperature gauge pipe, the pressure gauge pipe, the drain pipe, the exhaust pipe, the steam guide pipe and the sampling pipe. The small pipes outside the machine and boiler are characterized by many types, large quantities and wide distribution. In the actual production site, it is easy to neglect the suspension arrangement of the small pipes outside the machine and boiler, especially the installation position of some small pipes outside the machine and boiler is determined only according to the actual conditions on site, and the arrangement position of the support points has not been subjected to numerical simulation calculation and analysis, resulting in unreasonable selection of the support point position of the small pipe outside the machine and boiler, which makes the small pipe outside the machine and boiler produce a large vibration amplitude during the actual operation, resulting in cracks in the stress concentration part of the pipeline, such as the pipe seat corner weld and valve weld, which seriously endangers the safe operation of the unit.
[0003] In addition, the small pipes outside the boiler have a small weight and relatively large flexibility. Most of them rely on natural expansion and slight deformation to make up for the expansion difference with the main pipe. Therefore, it is not suitable to increase the rigidity of the pipe by adding support points, thereby reducing the vibration amplitude of the pipe. Utility Model Content
[0004] The utility model aims to overcome the technical problem of relatively large amplitude vibration of the small pipe outside the machine and boiler in the prior art, and provides an energy absorbing and vibration suppressing device for the small pipe outside the machine and boiler of a thermal power plant and a pipe system outside the machine and boiler.
[0005] The first aspect of the utility model provides an energy absorbing and vibration suppressing device for a small tube outside a boiler of a thermal power plant. The energy absorbing and vibration suppressing device comprises an elastic component, which is arranged on the outer peripheral wall side of the small tube outside the boiler and can utilize the elastic deformation of the elastic component to reduce the vibration amplitude generated by the small tube outside the boiler.
[0006] Through the above technical scheme, an elastic component is arranged on the outer peripheral wall side of the small tube outside the machine and boiler. The elastic component can be made of elastic material. When the small tube outside the machine and boiler vibrates, the elastic component can absorb the kinetic energy generated by the vibration of the small tube outside the machine and boiler, produce elastic deformation and convert it into elastic potential energy of the elastic component, thereby effectively suppressing the vibration of the pipeline and reducing the vibration amplitude of the small tube outside the machine and boiler without introducing additional constraints.
[0007] Optionally, the elastic component includes a spring, one end of which is connected to the external connection component, and the other end of which acts on the outer peripheral wall of the small tube outside the machine and furnace, so that the spring can be deformed when the small tube outside the machine and furnace vibrates.
[0008] Optionally, there are multiple springs, and the multiple springs are evenly distributed along the outer peripheral wall of the small tube outside the machine furnace.
[0009] Optionally, the spring is arranged to be pre-stretched between the external connection component and the small tube outside the boiler.
[0010] Optionally, the external connection component includes a square frame or a circular frame.
[0011] Optionally, the external connection component includes a square rooting element and a circular suspension element inscribed in the rooting element, and the inner wall of the suspension element is connected to the spring.
[0012] Optionally, it is characterized in that it also includes a bushing sleeved on the outside of the small tube outside the machine and furnace, and the end of the spring away from the external connection component is connected to the outer peripheral wall of the bushing so that it can act on the outer peripheral wall of the small tube outside the machine and furnace through the bushing.
[0013] Optionally, it also includes a gasket arranged between the bushing and the small tube outside the machine and furnace, and the gasket is configured to prevent relative sliding between the bushing and the small tube outside the machine and furnace.
[0014] Optionally, the elastic component includes a rubber pad, the rubber pad has a plurality of layers of rubber pad units, and a honeycomb cavity is formed between any two adjacent rubber pad units.
[0015] The second aspect of the utility model provides a boiler external piping system, comprising the above-mentioned energy absorbing and vibration suppressing device for small pipes outside boilers of thermal power plants. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] Figure 1 It is a structural schematic diagram of the energy absorption and vibration suppression device disclosed in the embodiment of the utility model;
[0017] Figure 2 It is a structural schematic diagram of the external piping system of the machine and furnace disclosed in the embodiment of the utility model.
[0018] Description of Reference Numerals
[0019] 1-rooting element; 2-suspension element; 3-spring; 4-bushing; 5-column; 6-energy absorption and vibration suppression device; 7-small pipe outside the boiler; 8-reinforced pipe joint; 9-reheating mother pipe. DETAILED DESCRIPTION
[0020] The following is a further detailed description of the implementation of the utility model in conjunction with the accompanying drawings and examples. The detailed description of the following examples and the accompanying drawings are used to exemplarily illustrate the principles of the utility model, but cannot be used to limit the scope of the utility model. The utility model can be implemented in many different forms, not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.
[0021] It should be noted that, in the description of the present invention, unless otherwise specified, the meaning of "multiple" is greater than or equal to two; the terms "upper", "lower", "inner", "outer", "far", "near" and the like indicating directions or positional relationships 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 direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention. When the absolute position of the object being described changes, the relative positional relationship may also change accordingly.
[0022] In addition, the words "include" or "comprises" and the like used in the present invention mean that the elements before the word include the elements listed after the word, and do not exclude the possibility of including other elements. It should also be noted that in the description of the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances. When a specific device is described as being located between a first device and a second device, there may or may not be an intermediate device between the specific device and the first device or the second device.
[0023] Aiming at the technical problem that the existing unreasonable design of the supporting points of the small pipes outside the boiler causes a large vibration amplitude during the operation of the pipeline, the utility model provides an energy absorbing and vibration suppressing device for the small pipes outside the boiler of a thermal power plant and a pipeline system outside the boiler.
[0024] Reference Figure 1 and Figure 2 The first aspect of the utility model provides an energy absorbing and vibration suppressing device for a small tube outside a boiler in a thermal power plant, comprising an elastic component, which is arranged on the outer peripheral wall side of the small tube 7 outside the boiler, and can reduce the vibration amplitude of the small tube 7 outside the boiler by utilizing the elastic deformation of the elastic component.
[0025] Through the above technical scheme, an elastic component is provided on the outer peripheral wall side of the small tube 7 outside the machine and furnace. The elastic component can be made of elastic material. When the small tube 7 outside the machine and furnace vibrates, the elastic component can absorb the kinetic energy generated by the vibration of the small tube 7 outside the machine and furnace, generate elastic deformation and convert it into elastic potential energy of the elastic component, thereby effectively suppressing the vibration of the pipeline and reducing the vibration amplitude of the small tube 7 outside the machine and furnace without introducing additional constraints.
[0026] Optionally, the elastic component includes a rubber pad, and by wrapping the rubber pad around the outer peripheral wall of the small tube 7 outside the machine and furnace, and utilizing the characteristic that the rubber pad can generate elastic deformation when under pressure, the vibration generated during the operation of the small tube 7 outside the machine and furnace is converted into the elastic energy of the rubber pad, thereby reducing the vibration amplitude of the small tube 7 outside the machine and furnace. Of course, in order to better exert the vibration reduction effect of the rubber pad, a fixing unit can be provided on the outside of the rubber pad, or the outside of the rubber pad can be directly abutted against the outer wall of the column 5, so that the rubber pad can more easily generate elastic deformation when the small tube 7 outside the machine and furnace vibrates.
[0027] Furthermore, the rubber pad may have multiple layers of rubber pad units, and a honeycomb cavity is formed between any two adjacent rubber pad units, thereby improving the vibration reduction effect of the rubber pad.
[0028] Or, preferably, refer to Figure 1 The energy absorption and vibration suppression device provided by the utility model may also include an external connection component, which can be fixed on the outer wall of the column 5. The elastic component may include a spring 3, one end of which is connected to the external connection component, and the other end acts on the outer peripheral wall of the small tube 7 outside the machine furnace, so that the spring 3 can be deformed when the small tube 7 outside the machine furnace vibrates, and the kinetic energy of the vibration of the small tube 7 outside the machine furnace is converted into the elastic potential energy of the spring 3, and finally the vibration amplitude of the small tube 7 outside the machine furnace is reduced.
[0029] Optionally, there are multiple springs 3, and the multiple springs 3 are evenly distributed along the outer peripheral wall of the small tube 7 outside the machine furnace, and the multiple springs 3 are on the same horizontal plane or vertical plane. Figure 1 The number of springs 3 is 8, and the 8 springs 3 are evenly arranged on the outer peripheral wall of the small tube 7 outside the machine and furnace, that is, a 45° angle is formed between any two springs 3. In this way, even if the vibration direction of the small tube 7 outside the machine and furnace is irregular, multiple springs 3 cooperate with each other to achieve a better vibration reduction effect.
[0030] Optionally, the spring 3 is pre-stretched between the external connection assembly and the small tube 7 outside the machine and furnace. Since the vibration direction of the small tube 7 outside the machine and furnace is unpredictable, the spring 3 is slightly stretched when installing the spring 3, so that the installed spring 3 generates a certain pulling force on the small tube 7 outside the machine and furnace, thereby achieving a better shock absorption effect, wherein the magnitude of the pulling force generated by the spring 3 can be determined according to the actual diameter of the small tube 7 outside the machine and furnace and the installation position.
[0031] It should be noted that in the embodiment of the utility model, the spring 3 can be a spring with a smaller elastic modulus. The smaller elastic modulus of the spring 3 makes it easier for the spring 3 to produce elastic deformation. On the one hand, the shock absorbing effect of the spring 3 can be improved; on the other hand, the spring 3 can be prevented from forming a rigid constraint with the small pipe 7 outside the machine and furnace, which is not conducive to reducing the vibration amplitude of the small pipe 7 outside the machine and furnace. The specific elastic modulus of the spring 3 can be selected according to the diameter and amplitude of the small pipe 7 outside the machine and furnace on site.
[0032] Optionally, the external connection component includes a square frame or a circular frame, that is, the external connection component may have a frame structure, a hook may be provided on the inner wall of the frame to facilitate connection with the spring 3, and the outer wall of the frame may be fixedly connected to the column 5. Of course, the frame structure may also be suspended.
[0033] Or, preferably, refer to Figure 1 The external connection component includes a square rooting element 1 and a circular suspension element 2 inscribed in the rooting element 1. The inner wall of the suspension element 2 may be provided with a hook, and the inner wall of the suspension element 2 is connected to the spring 3 through the hook. The outer wall of the rooting element 1 may be fixedly connected to the outer wall of the column 5. Since the shape of the rooting element 1 is square, the contact area between the rooting element 1 and the outer wall of the column 5 is greatly increased, because the rooting element 1 is fixed to the outer wall of the column 5. The inner wall of the rooting element 1 may be tangentially connected to the outer wall of the suspension element 2. Of course, the rooting element 1 and the suspension element 2 may also be connected by a connecting component, for example, a plurality of columnar connecting rods are provided between the inner wall of the rooting element 1 and the outer wall of the suspension element 2, so as to connect the rooting element 1 to the suspension element 2. In addition, since the suspension element 2 is circular, it is more conducive to the multiple springs 3 uniformly arranged on the outer peripheral wall of the small tube 7 outside the machine furnace to achieve vibration reduction in multiple directions. The size of the rooting element 1 and the suspension element 2 can be selected according to the length of the selected spring 3.
[0034] Optional, see Figure 1The energy absorption and vibration suppression device provided by the utility model also includes a bushing 4 sleeved on the outside of the small tube 7 outside the machine and furnace, and the bushing 4 is in the shape of a circular tube. One end of the spring 3 away from the external connection component is connected to the outer peripheral wall of the bushing 4, so that it can act on the outer peripheral wall of the small tube 7 outside the machine and furnace through the bushing 4. Among them, the outer peripheral wall of the bushing 4 can be provided with a hook, and the end of the spring 3 away from the external connection component is connected to the outer peripheral wall of the bushing 4 through the hook.
[0035] Furthermore, the energy absorption and vibration suppression device provided by the utility model may also include a gasket disposed between the bushing 4 and the small tube 7 outside the machine furnace, and the gasket is configured to prevent relative sliding between the bushing 4 and the small tube 7 outside the machine furnace. The gasket is in the shape of a circular tube, and its inner diameter is the same as the outer diameter of the gasket installation position on the small tube 7 outside the machine furnace, further improving the anti-slip effect of the gasket. The gasket can be made of rubber or polytetrafluoroethylene material, or preferably nylon material. The gasket made of the above materials can also reduce the noise of friction between the bushing 4 and the small tube 7 outside the machine furnace.
[0036] The second aspect of the present invention provides a boiler external piping system, comprising the above-mentioned energy absorption and vibration suppression device for the boiler external small pipe of a thermal power plant. Figure 2 The external piping system of the machine and boiler may include a reheating mother pipe 9, an external small pipe 7 and an energy absorbing and vibration suppressing device 6, wherein one end of the external small pipe 7 is connected to the reheating mother pipe through a reinforced pipe joint 8, and the energy absorbing and vibration suppressing device 6 can be installed at multiple positions on the outer peripheral wall of the external small pipe 7, and the outer wall of the energy absorbing and vibration suppressing device 6 can be fixed on the outer wall of the column 5, so as to reduce the vibration amplitude of the external small pipe 7 through the energy absorbing and vibration suppressing device 6.
[0037] The preferred embodiments of the present invention are described in detail above in conjunction with the accompanying drawings, but the present invention is not limited thereto. Within the technical concept of the present invention, the technical solution of the present invention can be subjected to a variety of simple modifications, including the combination of various specific technical features in any appropriate manner. In order to avoid unnecessary repetition, the present invention will not further describe various possible combinations. However, these simple modifications and combinations should also be regarded as the contents disclosed by the present invention and belong to the protection scope of the present invention.
Claims
1. An energy absorbing and vibration suppressing device for small pipes outside the boiler of a thermal power plant, characterized in that: It comprises an elastic component, which is arranged on the outer peripheral wall side of the small tube (7) outside the machine and furnace, and can reduce the vibration amplitude generated by the small tube (7) outside the machine and furnace by utilizing the elastic deformation of the elastic component; The elastic component comprises a spring (3), one end of which is connected to the external connection component, and the other end of which acts on the outer peripheral wall of the small tube (7) outside the machine and furnace, so that the spring (3) can be deformed when the small tube (7) outside the machine and furnace vibrates.
2. The energy absorption and vibration suppression device according to claim 1, characterized in that: The number of the springs (3) is multiple, and the multiple springs (3) are evenly distributed along the outer peripheral wall of the small tube (7) outside the boiler.
3. The energy absorption and vibration suppression device according to claim 1, characterized in that: The spring (3) is arranged to be pre-stretched between the external connection component and the small tube (7) outside the boiler.
4. The energy absorption and vibration suppression device according to claim 1, characterized in that: The external connection component includes a square frame or a circular frame.
5. The energy absorption and vibration suppression device according to claim 1, characterized in that: The external connection component comprises a square rooting element (1) and a circular suspension element (2) inscribed in the rooting element (1), and the inner wall of the suspension element (2) is connected to the spring (3).
6. The energy absorbing and vibration suppressing device according to any one of claims 1 to 5, characterized in that: It also includes a bushing (4) sleeved on the outside of the small tube (7) outside the machine and furnace, and one end of the spring (3) away from the external connection component is connected to the outer peripheral wall of the bushing (4) so that it can act on the outer peripheral wall of the small tube (7) outside the machine and furnace through the bushing (4).
7. The energy absorption and vibration suppression device according to claim 6, characterized in that: It also includes a gasket arranged between the bushing (4) and the small tube (7) outside the machine and furnace, and the gasket is configured to prevent relative sliding between the bushing (4) and the small tube (7) outside the machine and furnace.
8. The energy absorbing and vibration suppressing device according to claim 1, characterized in that: The elastic component comprises a rubber pad, and the rubber pad comprises a plurality of rubber pad units, and a honeycomb cavity is formed between any two adjacent rubber pad units.
9. A boiler external piping system, characterized in that: The invention comprises the energy absorbing and vibration suppressing device for small pipes outside a boiler of a thermal power plant as described in any one of claims 1 to 8.