High-temperature-resistant steam pipeline

Abstract

The invention discloses a high-temperature-resistant steam pipeline, and relates to the technical field of steam pipelines, the high-temperature-resistant steam pipeline comprises a high-temperature-resistant pipeline, a pneumatic blade is arranged at one end of the high-temperature-resistant pipeline, a reciprocating lead screw located in the high-temperature-resistant pipeline is fixed to one end of the pneumatic blade, and a first pressure relief mechanism is arranged in the high-temperature-resistant pipeline; the first pressure relief mechanism comprises a sleeve, a pressing rod, a sliding block, a second spring and a first blocking block, a second pressure relief mechanism is arranged in the high-temperature-resistant pipeline, and the second pressure relief mechanism comprises a connecting rod, a second blocking block and a third spring. The high-temperature-resistant pipeline is fixed to a proper position, the supporting sliding rail is connected with the support through the spring, meanwhile, high-pressure steam passes through the pressure relief valve mechanism and is coarsely adjusted through the first valve, dynamically adjusted through the second valve and finely controlled through the third valve, stable pressure relief is ensured, the structure can adapt to thermal expansion, stress concentration is prevented, the inner wall of the pipeline is automatically cleaned, and the working efficiency is improved. And heat conduction efficiency and flowing performance are maintained.

Description

Technical Field

[0001] The present invention relates to the technical field of steam pipelines, and particularly to a high-temperature resistant steam pipeline. Background Art

[0002] High-temperature resistant steam pipelines are the core components of industrial thermal energy transmission systems and are widely used in fields such as thermal power generation, chemical engineering, and metallurgy. In the early days, ordinary carbon steel materials were mainly used, but they were prone to oxidation, creep, and stress corrosion in high-temperature and high-pressure steam environments, resulting in a significant reduction in the pipeline lifespan. With the progress of materials science, austenitic stainless steel and nickel-based alloys have gradually become the mainstream choices, significantly improving the temperature resistance and corrosion resistance of the pipelines. To meet the requirements of supercritical working conditions, modern technologies adopt a multi-layer composite structure design. The inner layer uses high-temperature alloys or ceramic coatings to improve heat resistance, the middle layer selects high-strength alloys to withstand high pressure, and the outer layer uses heat insulation materials to reduce heat loss. At the same time, advanced welding processes and non-destructive testing technologies ensure the overall performance and safety of the pipelines. In recent years, the introduction of intelligent monitoring technologies enables the real-time monitoring of the pipeline operating status, further improving the reliability and service life of the system. Relevant international standards have put forward strict requirements for material selection, manufacturing processes, and testing methods, promoting the development of this technology towards higher temperature resistance levels, longer service lives, and lower energy consumption.

[0003] Most existing high-temperature resistant steam pipeline systems have the following technical problems. Firstly, the support structure is fixed and lacks dynamic adjustment capabilities, unable to effectively adapt to pipeline thermal expansion, resulting in concentrated thermal stress, increased deformation, relying on manual intervention for repair, and potentially causing vibration and fatigue fracture risks. In addition, during long-term operation, impurities such as scale and corrosion products are likely to deposit on the inner wall of the pipeline, not only reducing the heat conduction efficiency, increasing the flow resistance, but also accelerating local corrosion and shortening the pipeline service life. These problems not only increase the system maintenance difficulty but also affect the stability of steam transmission and the energy efficiency performance. Summary of the Invention

[0004] Based on this, the purpose of the present invention is to provide a high-temperature resistant steam pipeline to solve the technical problems of the high-temperature resistant steam pipeline that requires manual intervention for repair due to pipeline deformation caused by thermal stress, and the existing supports and hangers are difficult to dynamically adapt to thermal expansion, prone to vibration and fatigue fracture, and the sediment generated after long-term use inside the pipeline will lead to consequences such as reduced thermal efficiency, increased flow resistance, and accelerated corrosion.

[0005] To achieve the above object, the present invention provides the following technical solutions: a high-temperature resistant steam pipeline, including a high-temperature resistant pipeline, one end of the high-temperature resistant pipeline is provided with a pneumatic blade, one end of the pneumatic blade is fixed with a reciprocating lead screw located inside the high-temperature resistant pipeline, a scraping rod is arranged outside the reciprocating lead screw, a spiral chute matched with the scraping rod is opened inside the high-temperature resistant pipeline, a first pressure relief mechanism is arranged inside the high-temperature resistant pipeline, the first pressure relief mechanism includes a sleeve, a pressure rod, a sliding block, a second spring and a first plugging block, the sleeve is arranged inside the high-temperature resistant pipeline, one end of the pressure rod is arranged inside the sleeve, the sliding block is arranged at the bottom end of the pressure rod, the second spring is arranged at the bottom end of the sliding block, the first plugging block is arranged at the bottom end of the second spring, a second pressure relief mechanism is arranged inside the high-temperature resistant pipeline, the second pressure relief mechanism includes a connecting rod, a second plugging block and a third spring, the connecting rod is arranged at the top end of the second plugging block, the second plugging block is arranged inside the high-temperature resistant pipeline, and the third spring is arranged at the top end of the second plugging block.

[0006] By adopting the above technical solutions, when the high-temperature resistant pipeline is in normal use, the high-pressure steam flow passing through its interior will impact the pneumatic blade during passage, causing the pneumatic blade to rotate according to the flow velocity of the air flow. When the pneumatic blade rotates, it will drive the reciprocating lead screw arranged at one end thereof to rotate synchronously. When the reciprocating lead screw rotates, it can drive the scraping rod meshed with its thread outside to rotate synchronously, so that the scraping rod can slide along multiple thread chutes opened inside the main body. And due to the action of the reciprocating lead screw, the scraping rod reciprocates inside the pipeline, scraping off impurities such as scale and corrosion products easily deposited inside the pipeline and taking them away through the high-speed flowing steam flow.

[0007] Further, a pressure relief valve mechanism is arranged inside the high-temperature resistant pipeline. The pressure relief valve mechanism includes a first valve, a second valve and a third valve. The first valve is arranged at the top end of the second valve, the second valve is arranged at the top end of the third valve, the third valve is arranged inside the high-temperature resistant pipeline, the through-hole diameter of the third valve is larger than that of the second valve, and multiple curved through-holes are opened inside the first valve.

[0008] By adopting the above technical solution, when the steam pressure inside the steam pipeline is too high, the first blocking block arranged inside the first pressure relief mechanism connected to the inside of the pipeline will move upward along the sleeve, and the upward force will be buffered by the second spring and then transmitted to the sliding block, so that the pressure rod at the top of the sliding block moves upward. When one end of the pressure rod moves upward, the other end will rotate around the cylinder arranged inside the high-temperature resistant pipeline, and then press down to make the connecting rod connected to it squeeze the second blocking block to move downward. When the second blocking block moves downward, multiple groups of third springs arranged at its top will exhibit a certain spring contraction force, so as to ensure that it can be reset when the pressure inside the subsequent high-temperature resistant pipeline is relatively small.

[0009] Further, the pressure rod and the connecting rod are connected by a rotating shaft, the sliding block and the pressure rod are connected by a rotating shaft, a chute matching the sliding block is arranged inside the sleeve, and a cavity matching the pressure rod is arranged inside the sleeve.

[0010] By adopting the above technical solution, when the second blocking block moves downward to a certain extent, a certain gap will be exposed, enabling the inside of the pipeline to communicate with the outside of the pipeline, so that the high-pressure steam flowing inside the pipeline sprays out. When the high-pressure steam sprays upward again, it will pass through the pressure relief valve mechanism. The first valve is responsible for rough adjustment and rapid pressure relief, the second valve is responsible for regulating with a window and dynamically adjusting the opening area according to the pressure fluctuation, and the third valve is responsible for fine control to avoid vibration caused by sudden pressure drop, promoting the discharge of part of the high-pressure steam, thereby buffering the pressure of the high-pressure steam inside the pipeline.

[0011] Further, there are multiple groups of brackets on the outer side of the high-temperature resistant pipeline, a cover is arranged on the outer side of the high-temperature resistant pipeline, a support slide rail is arranged at the bottom of the bracket, the support slide rail and the bracket are elastically connected by a first spring, a fixing frame matching the reciprocating lead screw is arranged inside the high-temperature resistant pipeline, and a scraping plate matching the high-temperature resistant pipeline is arranged on the outer side of the scraping rod.

[0012] By adopting the above technical solution, it achieves the effect that the support structure has the ability of dynamic adjustment, can adapt to the thermal expansion of the pipeline, prevent the concentration of thermal stress and the aggravation of deformation, and during the long-term operation process, the inner wall of the pipeline can be self-cleaned, easily depositing impurities such as scale and corrosion products, ensuring the heat conduction efficiency and reducing the flow resistance.

[0013] In summary, the present invention mainly has the following beneficial effects: By fixing the high-temperature resistant pipeline in a suitable position, the support slide rail and the bracket are connected by a spring, allowing the bracket to slide and maintaining a tensile force. The high-pressure steam in the pipeline pushes the pneumatic blades to rotate, driving the reciprocating screw rod to rotate, causing the scraping rod to move along the spiral chute, removing scale and impurities on the inner wall, and being carried away by the steam. When the air pressure is too high, the first plug block of the first pressure relief mechanism moves upward, transmitting force through the spring to the sliding block, pushing the pressure rod to press down the connecting rod, causing the second plug block to move downward, exposing a gap for pressure relief. At the same time, the high-pressure steam passes through the pressure relief valve mechanism, being roughly adjusted by the first valve, dynamically adjusted by the second valve, and finely controlled by the third valve to ensure stable pressure relief. This structure can adapt to thermal expansion, prevent stress concentration, and automatically clean the inner wall of the pipeline, maintaining the heat conduction efficiency and flow performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 is a schematic diagram of the overall structure of the present invention; Figure 2 is a schematic diagram of the bracket structure of the present invention; Figure 3 is a schematic diagram of a partial structure of the present invention; Figure 4 is a schematic diagram of a local structure of the present invention; Figure 5 For the present invention Figure 4 is an enlarged view of part A; Figure 6 For the present invention Figure 4 is an enlarged view of part B; Figure 7 For the present invention Figure 4 is an enlarged view of part C; Figure 8 is a schematic diagram of the internal structure of the present invention; Figure 9 For the present invention Figure 8 is an enlarged view of part D.

[0015] In the figure: 1, high-temperature resistant pipeline; 2, support slide rail; 3, bracket; 4, pneumatic blade; 5, cover; 6, first spring; 7, first pressure relief mechanism; 701, sleeve; 702, pressure rod; 703, sliding block; 704, second spring; 705, first plug block; 8, second pressure relief mechanism; 801, connecting rod; 802, second plug block; 803, third spring; 9, pressure relief valve mechanism; 901, first valve; 902, second valve; 903, third valve; 10, reciprocating screw rod; 11, spiral chute; 12, scraping rod; 13, fixing frame; 14, scraper; 15, roller. DETAILED DESCRIPTION OF THE INVENTION

[0016] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. The embodiments described below by referring to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as a limitation to the present invention.

[0017] The embodiments of the present invention will be described below according to its overall structure.

[0018] A high-temperature resistant steam pipeline, as Figures 1 - 9 shown, includes a high-temperature resistant pipeline 1. One end of the high-temperature resistant pipeline 1 is provided with a pneumatic blade 4. One end of the pneumatic blade 4 is fixed with a reciprocating lead screw 10 located inside the high-temperature resistant pipeline 1. A scraping rod 12 is arranged outside the reciprocating lead screw 10. A spiral chute 11 matching the scraping rod 12 is opened inside the high-temperature resistant pipeline 1. A first pressure relief mechanism 7 is arranged inside the high-temperature resistant pipeline 1. The first pressure relief mechanism 7 includes a sleeve 701, a pressure rod 702, a sliding block 703, a second spring 704 and a first blocking block 705. The sleeve 701 is arranged inside the high-temperature resistant pipeline 1. One end of the pressure rod 702 is arranged inside the sleeve 701. The sliding block 703 is arranged at the bottom end of the pressure rod 702. The second spring 704 is arranged at the bottom end of the sliding block 703. The first blocking block 705 is arranged at the bottom end of the second spring 704. A second pressure relief mechanism 8 is arranged inside the high-temperature resistant pipeline 1. The second pressure relief mechanism 8 includes a connecting rod 801, a second blocking block 802 and a third spring 803. The connecting rod 801 is arranged at the top end of the second blocking block 802. The second blocking block 802 is arranged inside the high-temperature resistant pipeline 1. The third spring 803 is arranged at the top end of the second blocking block 802. Among them, when the high-temperature resistant pipeline is in normal use, the high-pressure steam flow passing through its interior will impact the pneumatic blade when passing through, causing the pneumatic blade to rotate according to the flow velocity of the air flow. When the pneumatic blade rotates, it will drive the reciprocating lead screw arranged at one end of it to rotate synchronously. When the reciprocating lead screw rotates, it can drive the scraping rod meshed with its thread outside to rotate synchronously, so that the scraping rod can slide along multiple thread chutes opened inside the main body. And due to the effect of the reciprocating lead screw, the scraping rod reciprocates inside the pipeline, scraping off impurities such as scale and corrosion products easily deposited inside the pipeline, and taking them away by the high-speed flowing steam flow; Exemplarily, a pressure relief valve mechanism 9 is arranged inside the high-temperature resistant pipeline 1. The pressure relief valve mechanism 9 includes a first valve 901, a second valve 902 and a third valve 903. The first valve 901 is arranged at the top end of the second valve 902. The second valve 902 is arranged at the top end of the third valve 903. The third valve 903 is arranged inside the high-temperature resistant pipeline 1. The through-hole diameter of the third valve 903 is larger than that of the second valve 902. Multiple groups of bent through-holes are formed inside the first valve 901. Among them, when the steam pressure inside the steam pipeline is too high, the first plug block arranged inside the first pressure relief mechanism connected to the inside of the pipeline will move upward along the sleeve, and the force of the upward movement will be buffered by the second spring and then transmitted to the sliding block, so as to make the pressure rod at the top end of the sliding block move upward. When one end of the pressure rod moves upward, the other end will take the cylinder arranged inside the high-temperature resistant pipeline as the axis, and then press down and make the connecting rod connected to it squeeze the second plug block to move downward. When the second plug block moves downward, multiple groups of third springs arranged at its top end will present a certain spring contraction force, so as to ensure that it can be reset when the pressure inside the subsequent high-temperature resistant pipeline is relatively small; Exemplarily, the pressure rod 702 and the connecting rod 801 are connected by a rotating shaft. The sliding block 703 and the pressure rod 702 are connected by a rotating shaft. A chute matching with the sliding block 703 is formed inside the sleeve 701. A cavity matching with the pressure rod 702 is formed inside the sleeve 701. Among them, when the second plug block moves downward to a certain extent, a certain gap will be exposed, enabling the inside of the pipeline to communicate with the outside of the pipeline, so that the high-pressure steam flowing inside the pipeline will be ejected. When the high-pressure steam jets upward again, it will pass through the pressure relief valve mechanism. The first valve is responsible for rough adjustment and rapid pressure relief. The second valve is responsible for regulating with a window and dynamically adjusting the opening area according to the pressure fluctuation. The third valve is responsible for fine control to avoid vibration caused by sudden pressure drop and promote the discharge of part of the high-pressure steam, so as to relieve the pressure of the high-pressure steam inside the pipeline; Exemplarily, there are multiple groups of brackets 3 outside the high-temperature resistant pipeline 1. A cover 5 is arranged outside the high-temperature resistant pipeline 1. A support slide rail 2 is arranged at the bottom end of the bracket 3. The support slide rail 2 and the bracket 3 are elastically connected by a first spring 6. A fixing frame 13 matching with the reciprocating lead screw 10 is arranged inside the high-temperature resistant pipeline 1. A scraping plate 14 matching with the high-temperature resistant pipeline 1 is arranged outside the scraping rod 12. Among them, it achieves the effect that the support structure has the ability of dynamic adjustment, can adapt to the thermal expansion of the pipeline, prevent the concentration of thermal stress and the aggravation of deformation, and during the long-term operation process, the inner wall of the pipeline can be self-cleaned of impurities such as easily deposited water scale and corrosion products, ensuring the heat conduction efficiency and reducing the flow resistance.

[0019] The working principle of the present invention is as follows: when in use, the staff fixes the bracket arranged on the outside of the high temperature resistant pipe in a suitable position, and then fixes the support rail by bolts with the help of external tools, so that the bracket can slide on the support rail, and the spring inside the bracket can maintain the tensile force on the bracket; When the high temperature resistant pipe is in normal use, the high pressure steam airflow passing through it will impact the pneumatic blades when passing through, causing the pneumatic blades to rotate according to the speed of the airflow. When the pneumatic blades rotate, the reciprocating screw arranged at one end of the pneumatic blades will also rotate synchronously. When the reciprocating screw is also rotating, the scraper rod meshing with its thread on the outside can be driven to rotate synchronously, so that the scraper rod can slide along the multiple sets of threaded grooves opened inside the main body. Because of the action of the reciprocating screw, the scraper rod circulates back and forth inside the pipeline, scraping off impurities such as scale and corrosion products that are easily deposited inside the pipeline, and taking them away through the high-speed steam flow; When the steam pressure inside the steam pipe is too high, the first blocking block arranged inside the first pressure relief mechanism connected with it inside the pipe will move upward along the sleeve, and the rising force will be mitigated by the second spring and then transmitted to the sliding block, so that the pressure rod at the top of the sliding block will move upward. When one end of the pressure rod moves upward, the other end will take the cylinder arranged inside the high-temperature resistant pipe as the axis, and then press down to make the connecting rod connected with it squeeze the second blocking block to move downward. When the second blocking block moves downward, the multiple groups of third springs arranged at the top will show a certain spring contraction force, so as to ensure that it can be reset when the pressure inside the high-temperature resistant pipe is relatively low. When the second blocking block moves down to a certain extent, a certain gap will be exposed, so that the inside of the pipeline is connected with the outside of the pipeline, so that the high-pressure steam flowing in the pipeline can be ejected. When the high-pressure steam is ejected upward again, it will pass through the pressure relief valve mechanism. The first valve is responsible for coarse adjustment and rapid pressure relief. The second valve is responsible for window adjustment and dynamically adjusts the opening area according to pressure fluctuations. The third valve is responsible for fine control to avoid vibration caused by sudden pressure drop, so as to discharge part of the high-pressure steam, thereby relieving the pressure of the high-pressure steam inside the pipeline. Through the above structure, the supporting structure has dynamic adjustment ability, can adapt to the thermal expansion of the pipeline, prevent thermal stress concentration and aggravated deformation, and during long-term operation, the inner wall of the pipeline can self-clean impurities such as easily deposited scale and corrosion products, thereby ensuring heat conduction efficiency and reducing flow resistance.

[0020] Although embodiments of the present invention have been shown and described, the specific embodiments are merely explanations of the present invention and not limitations thereof. The specific features, structures, materials, or characteristics described may be combined in a suitable manner in any one or more embodiments or examples. After reading this specification, those skilled in the art may make modifications, substitutions, and variations that do not make a creative contribution to the embodiments as needed, but as long as they are within the scope of the claims of the present invention, they are protected by the patent law.

Claims

1. A high-temperature resistant steam pipeline, comprising a high-temperature resistant pipeline (1), characterized in that: One end of the high-temperature resistant pipeline (1) is provided with a pneumatic blade (4). One end of the pneumatic blade (4) is fixed with a reciprocating lead screw (10) located inside the high-temperature resistant pipeline (1). A scraping rod (12) is arranged outside the reciprocating lead screw (10). A spiral chute (11) matched with the scraping rod (12) is opened inside the high-temperature resistant pipeline (1). A first pressure relief mechanism (7) is arranged inside the high-temperature resistant pipeline (1). The first pressure relief mechanism (7) includes a sleeve (701), a pressure rod (702), a sliding block (703), a second spring (704), and a first plugging block (705). The sleeve (701) is arranged inside the high-temperature resistant pipeline (1). One end of the pressure rod (702) is arranged inside the sleeve (701). The sliding block (703) is arranged at the bottom end of the pressure rod (702). The second spring (704) is arranged at the bottom end of the sliding block (703). The first plugging block (705) is arranged at the bottom end of the second spring (704). A second pressure relief mechanism (8) is arranged inside the high-temperature resistant pipeline (1). The second pressure relief mechanism (8) includes a connecting rod (801), a second plugging block (802), and a third spring (803). The connecting rod (801) is arranged at the top end of the second plugging block (802). The second plugging block (802) is arranged inside the high-temperature resistant pipeline (1). The third spring (803) is arranged at the top end of the second plugging block (802).

2. The high-temperature resistant steam pipeline according to claim 1, wherein: A pressure relief valve mechanism (9) is arranged inside the high-temperature resistant pipeline (1). The pressure relief valve mechanism (9) includes a first valve (901), a second valve (902), and a third valve (903). The first valve (901) is arranged at the top end of the second valve (902). The second valve (902) is arranged at the top end of the third valve (903). The third valve (903) is arranged inside the high-temperature resistant pipeline (1).

3. The high-temperature resistant steam pipeline according to claim 2, wherein: The through-hole diameter of the third valve (903) is larger than that of the second valve (902). Multiple groups of curved through-holes are opened inside the first valve (901).

4. A high-temperature resistant steam pipeline according to claim 1, characterized in that: The pressure rod (702) and the connecting rod (801) are connected by a rotating shaft. The sliding block (703) and the pressure rod (702) are connected by a rotating shaft.

5. The high-temperature resistant steam pipeline according to claim 1, wherein: A chute matched with the sliding block (703) is opened inside the sleeve (701). A cavity matched with the pressure rod (702) is opened inside the sleeve (701).

6. The high-temperature resistant steam pipeline according to claim 1, wherein: There are multiple groups of brackets (3) outside the high-temperature resistant pipeline (1). A cover (5) is arranged outside the high-temperature resistant pipeline (1).

7. A high-temperature resistant steam pipeline according to claim 6, characterized in that: A support slide rail (2) is arranged at the bottom end of the bracket (3). The support slide rail (2) and the bracket (3) are elastically connected by a first spring (6).

8. A high-temperature resistant steam pipeline according to claim 1, characterized in that: A fixing frame (13) matched with the reciprocating lead screw (10) is arranged inside the high-temperature resistant pipeline (1). A scraping plate (14) matched with the high-temperature resistant pipeline (1) is arranged outside the scraping rod (12).

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