Composite expansion joint of through-wall pipe

Abstract

An expansion joint body comprises a boiler bottom protection plate, a through hole is formed in the middle of the boiler bottom protection plate, an inner heat insulation ring extending downwards is arranged at the inner ring end of the boiler bottom protection plate, an outer sleeve ring extending downwards is arranged at the outer ring end of the boiler bottom protection plate, the lower end of the outer sleeve ring is sleeved with an elastic telescopic body, and the elastic telescopic body extends downwards. The lower end of the expansion joint body is provided with a protective ring, the middle of the protective ring is provided with a through hole, an outer ring, folded downwards, of the protective ring is connected with the elastic telescopic body, the protective ring is provided with a heat insulation ring extending upwards, the upper end of the heat insulation ring is provided with a partition plate, and an inner ring of the partition plate is connected with the peripheral wall of the inner heat insulation ring in a closed mode. The space between the inner heat insulation ring and the heat insulation ring is filled with a semi-flowing high-temperature-resistant solvent, and the space between the heat insulation ring and the outer sleeve ring and the space between the heat insulation ring and the elastic telescopic body are filled with a heat insulation layer. The device has the effects of ensuring that smoke is not leaked and the whole device is sealed when the steam pipeline is smoothly and axially displaced during through-wall application or boiler application.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of high-temperature expansion joints, in particular to a through-wall pipe composite expansion joint. BACKGROUND

[0002] As shown in Figure 1 , the boiler 1002 has a high-temperature and high-pressure steam pipe 1003 that needs to pass through the bottom and top of the boiler; when not in operation, it remains relatively balanced and stationary between the boiler guard plate, but when in operation, the steam pipe 1003 will move irregularly downward or upward, so the boiler 1002 or the boiler guard plate 1001 cannot directly fix and weld the steam pipe 1003 to the bottom or top guard plate of the boiler 1002 at the adjacent A of the steam pipe 1003, thereby causing smoke to leak outward from A. Figure 1

[0003] According to the related technology in the above, the inventors believe that the steam pipe does not have upward or downward displacement when the boiler is in operation. CONTENT OF THE UTILITY MODEL

[0004] In order to improve the problem that the steam pipe does not have upward or downward displacement when the boiler is in operation, the present application provides a through-wall pipe composite expansion joint.

[0005] The through-wall pipe composite expansion joint provided by the present application adopts the following technical scheme:

[0006] A through-wall pipe composite expansion joint, comprising an expansion joint body, the expansion joint body comprising a boiler bottom guard plate, the boiler bottom guard plate having a through hole in the middle; the inner circle end of the boiler bottom guard plate is provided with a downwardly extending inner heat insulation ring; the outer circle end of the boiler bottom guard plate is provided with a downwardly extending outer sleeve ring; the lower end of the outer sleeve ring is provided with an elastic expansion body, which extends downward; the lower end of the expansion joint body is provided with a protective ring, the protective ring has a through hole in the middle, and the outer circle of the downwardly folded edge of the protective ring is connected with the elastic expansion body; the protective ring is provided with an upwardly extending heat insulation ring; the upper end of the heat insulation ring is provided with a partition plate, the inner circle of the partition plate is connected and closed with the outer peripheral wall of the inner heat insulation ring; the space between the inner heat insulation ring and the heat insulation ring is filled with a semi-flowing high-temperature resistant solvent, and the space between the heat insulation ring and the outer sleeve ring and the elastic expansion body is filled with a heat insulation layer.

[0007] ​By adopting the technical scheme, the excellent heat insulation effect, thermal expansion compensation function and structural stability are provided by reasonably configuring the boiler bottom guard plate, inner and outer heat insulation rings, elastic expansion body, partition plate and protective ring, and filling the semi-flowing high-temperature-resistant solvent and heat insulation layer in the corresponding space; the inner and outer heat insulation rings and the heat insulation layer effectively reduce heat loss and maintain the stability of the temperature in the pipeline; the elastic expansion body can adapt to the expansion and contraction of the pipeline caused by temperature change, ensuring the reliability of the expansion joint in a high-temperature and high-pressure environment; the design of the protective ring enhances the protection of the expansion joint and prevents the influence of external pressure on the expansion joint; meanwhile, the space between the inner heat insulation ring and the heat insulation ring is reasonably separated and closed by the partition plate, further optimizing the heat insulation effect; the semi-flowing high-temperature-resistant fire-retardant adhesive solvent can resist high temperature and still present a semi-flowing liquid state at high temperature; when the steam pipeline is subjected to reciprocating lifting movement or radial deformation and irregular thermal expansion and contraction in any direction, the high-temperature flue gas can still be blocked from flowing to other areas of the expansion joint body, avoiding flue gas leakage and escape.

[0008] Optionally, the protective ring comprises a protective ring body and a protective wall sleeve, the small-circle side edge of the protective ring body is downwardly folded at right angles, the large-circle side edge of the protective ring body is downwardly folded at right angles, and the outer side of the downwardly folded large-circle side edge is attached to the inner side of the lower end of the elastic expansion body and fastened by a screw.

[0009] By adopting the technical scheme, the structural stability and pressure resistance of the expansion joint are enhanced by the protective ring body and the protective wall sleeve, the close connection between the protective ring and the elastic expansion body is improved by the right-angle folding design, the reliability and sealing performance of the protective ring in a high-temperature and high-pressure environment are ensured by the screw fastening connection, the influence of external factors on the expansion joint is effectively prevented, and the anti-leakage, pressure resistance and corrosion resistance of the expansion joint are improved.

[0010] Optionally, a gap is arranged between the partition plate and the boiler bottom guard plate, and a heat insulation layer is filled in the gap.

[0011] By adopting the technical scheme, the heat insulation effect is effectively enhanced by filling the heat insulation layer in the gap between the partition plate and the boiler bottom guard plate, heat conduction to other parts of the expansion joint body is prevented, heat loss is reduced, stable operation of the expansion joint in a high-temperature environment is ensured, the heat protection performance of the expansion joint is improved, and the service life of the expansion joint is prolonged.

[0012] Optionally, a gap is arranged between the bottom of the inner heat insulation ring and the protective ring, and a semi-flowing high-temperature-resistant solvent is filled in the gap.

[0013] By adopting the above technical scheme, by setting a gap between the bottom of the inner heat insulation ring and the protective ring and filling the semi-flowing high-temperature resistant solvent, the technical scheme can effectively isolate heat, improve the heat resistance and stability of the equipment in a high-temperature environment, and ensure that the solvent presents a semi-flowing state without solidification during operation, thereby reducing heat transfer and enhancing the sealing of flue gas.

[0014] Optionally, the elastic expansion body is an outwardly convex arc-shaped cup, and the elastic expansion body 300 is made of elastic metal.

[0015] By adopting the above technical scheme, the elastic expansion body can effectively provide high-strength elastic expansion performance, enhance the adaptability and stability of the device, and be suitable for various complex working environments, thereby ensuring good pressure resistance and deformation resistance during use.

[0016] Optionally, the heat insulation layer is one or a combination of ceramic fiber, glass fiber, mineral wool, aluminum silicate fiber, microporous heat insulation material, and composite heat insulation material.

[0017] By adopting the above technical scheme, high-temperature conduction can be effectively isolated, heat loss can be reduced, and the heat protection performance of the equipment can be improved, while the equipment has good high-temperature resistance, corrosion resistance, and long-term stability, thereby ensuring that excellent heat insulation effects are continuously provided in a high-temperature environment.

[0018] Optionally, the semi-flowing high-temperature resistant solvent is one or a combination of bentonite-based high-temperature lubricant, metal powder-based lubricant, high-temperature silicone oil, graphite-based high-temperature resistant lubricant, high-temperature fluoride-based lubricant, and high-temperature resistant slurry.

[0019] By adopting the above technical scheme, by adopting a combination of bentonite-based high-temperature lubricant, metal powder-based lubricant, high-temperature silicone oil, graphite-based high-temperature resistant lubricant, high-temperature fluoride-based lubricant, or high-temperature resistant slurry, the semi-flowing liquid state is still maintained at high temperatures, the high-temperature flue gas can be blocked from flowing to other areas of the expansion joint body when the steam pipe moves up and down reciprocally, the friction coefficient can be effectively reduced in a high-temperature environment, the normal operation of the expansion joint in a high-temperature condition and the stability of heat energy leakage prevention can be ensured, and the leakage prevention performance is improved.

[0020] Optionally, a through hole is left in the middle of the expansion joint body, a steam pipeline is arranged in the through hole, and the inner circle of the boiler bottom guard plate, the inner circle of the protective ring, and the inner side wall of the semi-flowing high-temperature resistant solvent are in sliding damping connection with the outer peripheral wall of the steam pipeline.

[0021] By adopting the above technical scheme, the radial thermal deformation and thermal leakage of the pipeline due to thermal expansion can be effectively controlled, and the influence of thermal stress on the equipment can be reduced.

[0022] In summary, the present application has at least one of the following beneficial technical effects:

[0023] 1. By reasonably configuring the boiler bottom guard plate, inner and outer heat insulation rings, elastic expansion body, partition plate and protective ring, and filling semi-flowing high-temperature resistant solvent and heat insulation layer in the corresponding space, the heat can be effectively isolated, the heat energy loss can be reduced, and the temperature in the pipeline can be stabilized;

[0024] 2. The elastic expansion body can adapt to the expansion and contraction of the pipeline caused by temperature change, ensure the reliability of the expansion joint in a high-temperature and high-pressure environment, and avoid damage to the equipment caused by thermal expansion;

[0025] 3. The protective ring and the protective wall sleeve enhance the pressure resistance and pressure resistance of the expansion joint, ensure the stability and sealing of the expansion joint in a high-temperature and high-pressure environment, and prevent external pressure from affecting the expansion joint;

[0026] 4. The effect of the semi-flowing high-temperature resistant solvent in the expansion joint body is still in a semi-flowing liquid state at high temperature, which can effectively block the high-temperature flue gas from flowing to other areas of the expansion joint body, avoid flue gas leakage, and improve the thermal protection effect;

[0027] 5. The combination of the heat insulation layer and the semi-flowing high-temperature resistant solvent can effectively enhance the thermal protection performance of the equipment in a high-temperature environment and prolong the service life of the expansion joint;

[0028] 6. The semi-flowing high-temperature resistant solvent can maintain semi-flowing at high temperature, reduce the friction coefficient, prevent heat and flue gas leakage, and ensure stable operation of the equipment in a complex high-temperature environment.

[0029] 7. By setting a through hole in the expansion joint body and using a sliding damping connection between the steam pipeline and the inner ring of the protective ring, the radial thermal deformation of the pipeline caused by thermal expansion can be effectively reduced, and the influence of thermal stress on the equipment is further reduced. BRIEF DESCRIPTION OF DRAWINGS

[0030] Figure 1 is a schematic diagram of an expansion joint of related technology.

[0031] Figure 2 is a schematic diagram of a wall-penetrating composite expansion joint according to an embodiment of the application.

[0032] Explanation of reference signs: 1001, boiler guard plate; 1002, boiler one; 1003, steam pipeline one; 100, expansion joint body; 200, boiler bottom guard plate; 300, elastic expansion body; 400, sleeve ring; 500, protective ring; 501, protective ring main body; 502, protective wall sleeve; 600, heat insulation ring; 700, heat insulation layer; 800, semi-flowing high-temperature resistant solvent; 900, steam pipeline; 910, inner heat insulation ring; 920, partition plate 920. DETAILED DESCRIPTION

[0033] The following description will be made in conjunction with the accompanying drawings Figure 2 The application is further described in detail.

[0034] The application discloses a through-wall composite expansion joint. Referring to Figure 2 The expansion joint body 100 includes a boiler bottom guard plate 200, the inner circle end of the boiler bottom guard plate 200 is provided with a downwardly extending inner heat insulation ring 910; the outer circle end of the boiler bottom guard plate 200 is provided with a downwardly extending outer sleeve ring 400; the outer sleeve ring 400 is sleeved with an elastic expansion body 300 at the lower end, and the elastic expansion body 300 extends downwardly; the lower end of the expansion joint body 100 is provided with a protective ring 500, the middle of the protective ring 500 is provided with a through hole, and the outer circle of the downwardly folded edge of the protective ring 500 is connected with the elastic expansion body 300; the protective ring 500 is provided with an upwardly extending heat insulation ring 600; the upper end of the heat insulation ring 600 is provided with a partition plate 920, and the inner circle of the partition plate 920 is connected and closed with the outer peripheral wall of the inner heat insulation ring 910.

[0035] The space between the inner heat insulation ring 910 and the heat insulation ring 600 is filled with a semi-flowing high-temperature resistant solvent 800, which is one or a combination of bentonite-based high-temperature lubricant, metal powder-based lubricant, high-temperature silicone oil, graphite-based high-temperature resistant lubricant, high-temperature fluoride-based lubricant, and machine high-temperature slurry. The semi-flowing high-temperature resistant solvent 800 can provide effective lubrication in a high-temperature environment, reducing the relative friction of the steam pipeline 900. The semi-flowing high-temperature resistant solvent 800 using a combination of multiple lubricants can form a material with high-temperature lubrication, pressure resistance, wear resistance, and heat insulation, meeting more complex working condition requirements.

[0036] The space between the heat insulation ring 600 and the outer sleeve ring 400 and the elastic expansion body 300 is filled with a heat insulation layer 700, which is one or a combination of ceramic fiber, glass fiber, mineral wool, aluminum silicate fiber, microporous thermal insulation material, and composite thermal insulation material. The use of high-efficiency thermal insulation materials can effectively reduce heat conduction and block the influence of external high-temperature environments on internal equipment, thereby maintaining the stability and efficiency of the equipment in a high-temperature working environment. In addition, the above-mentioned materials have excellent high-temperature resistance, can maintain good heat insulation effect at extreme temperatures, prevent waste of heat energy, improve system energy efficiency and energy saving effect, and have strong anti-aging and corrosion resistance, maintaining stable heat insulation performance even during long-term use, prolonging the service life of the equipment. The use of a combination of ceramic fiber, glass fiber, and other materials can achieve a lighter thermal insulation structure, reducing the weight of the overall system, facilitating installation and maintenance, and reducing material costs, improving comprehensive performance, and having good compatibility and customizability. The thickness and material combination can be adjusted according to different application requirements to achieve the best thermal insulation effect.

[0037] The partition plate 920 has a gap with the boiler bottom guard plate 200, the gap is filled with a heat insulation layer 700, the bottom of the inner heat insulation ring 910 is provided with a gap with the protective ring 500, and the gap is filled with a semi-flowing high-temperature resistant solvent 800, which can effectively reduce the heat conduction between each part of the boiler, enhance the overall thermal stability of the equipment, and reduce the leakage of heat inside and outside the boiler through the filling of the heat insulation layer, thereby improving the energy utilization efficiency. The semi-flowing high-temperature resistant solvent 800 can act as a buffer medium under high temperature conditions, enhance the heat insulation performance of the gap area, and has good thermal energy flexibility resistance and leakage, and is resistant to high temperature, aging and corrosion, and can maintain stable performance in long-term work.

[0038] The elastic expansion body 300 is an outward convex arc-shaped cup, and is made of elastic metal, and in actual application, 301 stainless steel is used, which can effectively provide good elastic deformation ability and bearing capacity, adapt to the deformation requirement in high pressure or high temperature environment, and the outward convex arc shape can uniformly distribute the deformation and stress of internal and external pressure and thermal expansion and contraction, reduce local stress concentration, thereby improving the overall pressure resistance, preventing damage or deformation due to excessive pressure, and the elastic metal material has excellent elastic recovery, can occur controllable deformation under external force and quickly recover to the original state, ensure the long-term stability and durability of the equipment during use, and has high corrosion resistance and high temperature resistance. Even in harsh environments, it can still maintain good physical properties and prolong the service life of the equipment.

[0039] The expansion joint body 100 has a through hole in the middle, and a steam pipeline 900 is arranged in the through hole. The inner circle of the boiler bottom guard plate 200, the inner circle of the protective ring 500 and the inner side wall of the semi-flowing high-temperature resistant solvent 800 are all in sliding damping connection with the outer peripheral wall of the steam pipeline 900, which can effectively absorb and relieve the stress change of the steam pipeline due to thermal expansion in a high temperature and high pressure environment, prevent displacement or deformation of the pipeline due to expansion from causing damage to the equipment structure, and reduce the impact and vibration caused by pipeline thermal expansion through sliding damping connection while ensuring the axial displacement of the pipeline, thereby reducing the thermal stress and mechanical damage of the equipment and enhancing the stability and durability of the system. The application of the semi-flowing high-temperature resistant solvent 800 improves the lubricity of the sliding connection, ensuring that it can still maintain good damping effect and sealing effect in a high temperature working environment.

[0040] The implementation principle of the wall-penetrating composite expansion joint according to an embodiment of the application is as follows: the expansion joint body 100 passes through the boiler bottom guard plate 200, the outer sleeve ring 400, the elastic expansion body 300 and other multi-layer structures, fully utilizes the combination of the heat insulation layer 700 and the semi-flowing high-temperature resistant solvent 800, realizes effective heat insulation and damping effect, the semi-flowing high-temperature resistant solvent 800 can provide stable lubrication and flexible sealing effect in a high-temperature environment, reduces the friction between the steam pipeline 900 and other components, reduces mechanical damage, the heat insulation layer 700 utilizes the combination of ceramic fiber and glass fiber to block the conduction of heat, ensures that the heat inside and outside the boiler is not wasted, and improves the energy utilization efficiency, the elastic expansion body 300 adopts an outward convex arc-shaped calotte design and is made of elastic metal, has excellent elastic recovery, can effectively relieve displacement caused by thermal expansion, disperses pressure and thermal stress, prevents equipment damage caused by excessive expansion or excessive pressure, through optimized structural design and efficient material application, can provide excellent heat insulation and heat energy release, lubrication and mechanical damping effect in a high-temperature working environment, and can effectively prevent the expansion joint from being damaged by thermal expansion and pressure in the high-temperature working environment, and can effectively prevent the expansion joint from being damaged by thermal expansion and pressure in the high-temperature working environment Figure 1 B and C in the figure are filled with semi-flowing semi-flowing high-temperature resistant solvent 800, the semi-flowing high-temperature resistant solvent 800 can resist a high temperature of 700 DEG C and still present a semi-flowing liquid state at the high temperature, when the steam pipeline 900 moves up and down reciprocatingly, the semi-flowing high-temperature resistant solvent 800 can still block the high-temperature flue gas from flowing to the D region, and the elastic expansion body 300E made of non-metallic material is additionally installed at the outer edge, which can ensure smooth lifting of the pipeline and also ensure that the flue gas is not leaked and the entire device is sealed.

[0041] The above are preferred embodiments of the application, and do not limit the protection scope of the application, therefore: equivalent changes made according to the structure, shape, principle of the application should be covered within the protection scope of the application.

Claims

1. A composite expansion joint for a through-wall pipe comprising an expansion joint body (100) characterised in that: The expansion joint body (100) comprises a boiler bottom guard plate (200), a through hole is arranged in the middle of the boiler bottom guard plate (200); An inner heat insulation ring (910) extending downward is arranged at the inner ring end of the boiler bottom guard plate (200); An outer sleeve ring (400) extending downward is arranged at the outer ring end of the boiler bottom guard plate (200); An elastic expansion body (300) is sleeved at the lower end of the outer sleeve ring (400), and the elastic expansion body (300) extends downward; A protection ring (500) is arranged at the lower end of the expansion joint body (100), a through hole is arranged in the middle of the protection ring (500), and the outer ring of the downward folded edge of the protection ring (500) is connected with the elastic expansion body (300); The protection ring (500) is provided with an upward extending heat insulation ring (600); A partition plate (920) is arranged at the upper end of the heat insulation ring (600), and the inner ring of the partition plate (920) is connected and closed with the outer peripheral wall of the inner heat insulation ring (910); The space between the inner heat insulation ring (910) and the heat insulation ring (600) is filled with a semi-flowing high-temperature resistant solvent (800), and the space between the heat insulation ring (600) and the outer sleeve ring (400) and the elastic expansion body (300) is filled with a heat insulation layer (700).

2. The composite expansion joint for through-wall pipes according to claim 1, characterized in that: The protection ring (500) comprises a protection ring body (501) and a protection wall sleeve (502), the small ring side edge of the protection ring body (501) is downwardly folded at right angles, the large ring side edge of the protection ring body (501) is downwardly folded at right angles, and the outer side of the downwardly folded large ring side edge is attached to the inner side of the lower end of the elastic expansion body (300) and is fastened and connected by screws.

3. The composite expansion joint for through-wall pipes according to claim 1, characterized in that: The partition plate (920) and the boiler bottom guard plate (200) have a gap therebetween, and the gap is filled with a heat insulation layer (700).

4. The composite expansion joint for through-wall pipes according to claim 1, characterized in that: The bottom of the inner heat insulation ring (910) and the protection ring (500) have a gap therebetween, and the gap is filled with a semi-flowing high-temperature resistant solvent (800).

5. The composite expansion joint through-wall pipe of claim 1, wherein: The elastic expansion body (300) is an outwardly convex arc-shaped cup, and is made of an elastic metal.

6. The composite expansion joint through-wall pipe of claim 1, wherein: The heat insulation layer (700) is one of ceramic fiber, glass fiber, mineral wool, aluminum silicate fiber, microporous thermal insulation material and composite thermal insulation material.

7. The composite expansion joint through-wall pipe of claim 1, wherein: The semi-flowing high-temperature resistant solvent (800) is one of bentonite-based high-temperature lubricant, metal powder-based lubricant, high-temperature silicone oil, graphite-based high-temperature resistant lubricant, high-temperature fluoride-based lubricant and machine high-temperature slurry.

8. The composite expansion joint through-wall pipe of claim 1, wherein: A through hole is arranged in the middle of the expansion joint body (100), a steam pipeline (900) is arranged in the through hole, and the inner ring of the boiler bottom guard plate (200), the inner ring of the protection ring (500) and the inner side wall of the semi-flowing high-temperature resistant solvent (800) are all slidably and dampingly connected with the outer peripheral wall of the steam pipeline (900).

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