Stress releasing device of steel-in-steel steam pipeline

Abstract

The invention provides a stress release device for a steel-in-steel steam pipeline, and relates to the technical field of pipeline stress release, the stress release device comprises a telescopic pipeline, and four positioning side plates are mounted in the middle of the outer side of the telescopic pipeline; the positioning side plates penetrate through the outer side of the heat preservation protection layer. Four traction plates which are uniformly distributed are mounted on the outer side of the positioning ring plate; the traction plate and the positioning side plate are positioned on the same straight line; guide sliding rods are installed on the two outer sides of the positioning side plate, and limiting protruding blocks are installed on the outer sides of the guide sliding rods. The outer end of the guide sliding rod is mounted on the traction plate in a sliding manner; one driving ring drives four rotating gears to synchronously move, so that an adjusting screw rod can drive two guide wheels to synchronously move, different parts of the stress release device can be simultaneously adjusted with the same amplitude, and the problem that when the telescopic amplitude is adjusted, the telescopic amplitude of the different parts of the stress release device is easily inconsistent is solved.

Description

Technical Field

[0001] The invention relates to the technical field of pipeline stress release, and in particular to a stress release device for a steel-jacketed steel steam pipeline. Background Art

[0002] Steel-in-steel steam pipe is a pipeline system widely used in industrial and urban centralized heating fields. It is mainly used to transport high-temperature steam. When the steam pipe transports high-temperature steam, the pipe material will expand due to heat. When the transportation stops, the pipe will shrink. Thermal expansion or contraction will generate thermal stress inside the pipe. Therefore, a stress relief device is required to release the stress generated by the steel-in-steel steam pipe to ensure the safe and stable operation of the pipeline system and extend its service life.

[0003] In the prior art, when the stress relief device is in use, it is usually installed at the connection between two sections of the pipeline. In the initial installation stage, the expansion and contraction range of the stress relief device needs to be adjusted. When the expansion and contraction range is adjusted manually or with the help of tools, it is easy for the expansion and contraction ranges of different parts of the stress relief device to be inconsistently adjusted. When the pipeline system generates stress due to factors such as temperature changes, the stress relief device should release the stress evenly according to the preset expansion and contraction range. However, there are differences in the expansion and contraction ranges of various parts of the device, which makes it impossible to effectively and evenly release the stress, which not only reduces the overall performance of the stress relief device, but also may shorten the service life of the steel-jacketed steel steam pipeline. Summary of the invention

[0004] In view of the deficiencies in the prior art, the present invention provides a stress release device for a steel-jacketed steel steam pipeline to solve the problems mentioned in the above background technology.

[0005] The present invention provides a stress release device for a steel-in-steel steam pipeline, specifically comprising a telescopic pipeline, wherein two positioning ring plates are installed on the outer side of the telescopic pipeline, the positioning ring plate is an annular structure, a thermal insulation protective layer is installed between the two positioning ring plates, four positioning side plates are installed at the middle position of the outer side of the telescopic pipeline, the positioning side plate passes through the outer side of the thermal insulation protective layer, four evenly distributed traction plates are installed on the outer side of the positioning ring plate, the positions of the traction plate and the positioning side plate are on the same straight line, a guide slide bar is installed on the outer side of the positioning side plate, wherein a limiting protrusion is installed on the outer side of the guide slide bar, the outer end of the guide slide bar is slidably installed on the traction plate, a rotating gear is rotatably installed on the inner side of the positioning side plate, an adjusting screw is fixedly installed at the middle position of the rotating gear, a thread is provided on the outer side of the adjusting screw, the adjusting screw passes through both sides of the positioning side plate, and the adjusting screw also slides through the side of the traction plate.

[0006] Further, the telescopic pipe is of a cylindrical structure, and the inner edge positions at both ends of the telescopic pipe are inclined structures. A telescopic member is provided on the outer side of the telescopic pipe. The heat insulation and protection layer is made of an elastic material, and a heat insulation material is filled between the inner side of the heat insulation and protection layer and the outer side of the telescopic pipe.

[0007] Further, two limiting rings are installed on the inner side of the telescopic pipe. A sealing slide plate is also slidably installed on the inner side of the telescopic pipe. The sealing slide plate is located inside the telescopic member on the telescopic pipe and is also slidably installed between the two limiting rings.

[0008] Further, the outer side of one end of the telescopic pipe and the outer side of a positioning ring plate are welded and installed with a steam pipe body. The other end of the telescopic pipe and the outer side of another positioning ring plate are welded and installed with a connecting pipe. A flange is installed at the side end of the connecting pipe.

[0009] Further, adsorption buffer ribs are installed on the inner sides of both the steam pipe body and the connecting pipe. The adsorption buffer ribs are made of an elastic material. A driving ring is rotatably installed on the outer side of the heat insulation and protection layer.

[0010] Further, the driving ring is of an annular structure, and a serrated structure is provided on the outer side of the driving ring. The serrated structure meshes with the outer side of a rotating gear. Two guide wheels are installed on the thread on the outer side of the adjusting screw.

[0011] Further, a traction convex block is installed on the outer side of the guide wheel. The two guide wheels are located on both sides of a traction plate. The traction convex block is slidably installed on the outer side of a guide slide rod.

[0012] Further, guide rings are installed on the inner sides of both ends of the telescopic pipe. A rotating ring is rotatably installed between the outer side of the guide ring and the inner side of the telescopic pipe. The rotating ring is of an annular structure, and a plurality of uniformly distributed flow guiding plates are installed on the inner side of the rotating ring.

[0013] Further, a movable inner plate is installed on one side of the rotating ring. A cleaning scraping blade is provided on the outer side surface of the movable inner plate. The cleaning scraping blade contacts the inner side of the telescopic pipe and the inner side wall of the sealing slide plate.

[0014] Further, an adjusting chute is formed on the side surface of the movable inner plate. A connecting slide rod is slidably installed inside the adjusting chute. Limit convex blocks are provided at both ends of the connecting slide rod.

[0015] The present invention provides a stress release device for a steel-sheathed steel steam pipe, which has the following beneficial effects: When the present invention is in use, by rotating the driving ring to drive the rotating gear to rotate, one driving ring can drive four rotating gears to move synchronously, so that the adjusting screw can drive two guiding wheels to displace synchronously. Furthermore, through the sliding of the traction bump on the outer side of the guiding slide bar, the traction plate can be accurately positioned, and the different parts of the stress release device can be adjusted with the same amplitude at the same time, effectively avoiding the stress imbalance problem caused by adjustment deviation during the later stress release process, and greatly improving the effect of pipeline stress release; When the telescopic pipeline drives the positioning ring plate to expand and contract for stress release, the positioning ring plate can drive the traction plate to slide smoothly on the outer sides of the adjusting screw and the guiding slide bar, and the expansion and contraction amplitudes are strictly the same, significantly reducing the damage risk of the pipeline caused by uneven stress distribution, effectively extending the service life of the steel-sheathed steel steam pipeline, and providing a reliable guarantee for the long-term stable operation of the pipeline system; Through the connecting pipe and the adsorption buffer ribs evenly distributed inside the steam pipeline body, most of the vibrations can be effectively absorbed, not only reducing the damage to the pipeline system itself caused by vibrations, but more importantly, reducing the problem of unstable connection of the stress release device caused by vibrations, ensuring the reliable operation of the device under complex working conditions; By utilizing the power of the steam flow, the rotating ring is driven to drive the movable inner plate and the cleaning blade to clean the impurities on the inner wall of the telescopic pipeline, effectively solving the energy consumption problem caused by impurity accumulation and making the steam transmission more efficient and smooth. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings of the embodiments will be briefly introduced below.

[0017] The drawings in the following description only relate to some embodiments of the present invention and do not limit the present invention.

[0018] In the drawings: Figure 1 A schematic diagram showing the overall structure of the present invention is shown; Figure 2 A partial cross-sectional view of the telescopic pipeline of the present invention is shown; Figure 3 A partial cross-sectional view of the sealing slide plate of the present invention is shown; Figure 4 A schematic diagram showing the overall mechanism of the driving ring part of the present invention is shown; Figure 5 A schematic diagram showing the overall mechanism of the adjusting screw part of the present invention is shown; Figure 6 A schematic diagram showing the three-dimensional structure of the guiding wheel of the present invention is shown; Figure 7 A schematic diagram showing the three-dimensional structure of the rotating ring of the present invention is shown; Figure 8 The three-dimensional structure diagram of the movable inner plate of the present invention is shown; Figure 9 The three-dimensional structure diagram of the connecting slide bar of the present invention is shown.

[0019] Reference numerals: 1. Telescopic pipe; 101. Positioning ring plate; 102. Heat preservation and protection layer; 103. Limiting ring; 104. Sealing slide plate; 105. Steam pipe body; 106. Connecting pipe; 107. Adsorption buffer rib; 2. Positioning side plate; 201. Traction plate; 202. Guide slide bar; 203. Rotating gear; 204. Adjusting screw; 205. Driving ring; 206. Guide wheel; 207. Traction bump; 3. Guide ring; 301. Rotating ring; 302. Flow guiding plate; 303. Movable inner plate; 304. Cleaning blade; 305. Adjusting chute; 306. Connecting slide bar. Detailed implementation manners

[0020] For the purpose of making the objectives, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are some but not all of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the described embodiments of the present invention without creative efforts shall fall within the scope of protection of the present invention.

[0021] Please refer to Figures 1 to 9 : Embodiment 1: The present invention proposes a stress release device for a steel-sheathed steel steam pipeline, which includes a telescopic pipeline 1. There are two positioning ring plates 101 installed on the outer side of the telescopic pipeline 1. The positioning ring plates 101 are annular structures. A thermal insulation protection layer 102 is installed between the two positioning ring plates 101. The telescopic pipeline 1 is a cylindrical structure, and the inner edge positions at both ends of the telescopic pipeline 1 are inclined structures. There is a telescopic member on the outer side of the telescopic pipeline 1. The thermal insulation protection layer 102 is made of an elastic material. Thermal insulation materials are filled between the inner side of the thermal insulation protection layer 102 and the outer side of the telescopic pipeline 1. There are two limit rings 103 installed on the inner side of the telescopic pipeline 1. A sealing slide plate 104 is also slidably installed on the inner side of the telescopic pipeline 1. The sealing slide plate 104 is located inside the telescopic member on the telescopic pipeline 1. The sealing slide plate 104 is also slidably installed between the two limit rings 103. One end of the outer side of the telescopic pipeline 1 and the outer side of one positioning ring plate 101 are welded and installed with a steam pipeline body 105. The other end of the telescopic pipeline 1 and the outer side of the other positioning ring plate 101 are welded and installed with a connecting pipe 106. A flange is installed at the side end of the connecting pipe 106. Adsorption buffer ribs 107 are installed inside the steam pipeline body 105 and the connecting pipe 106. The adsorption buffer ribs 107 are made of an elastic material.

[0022] In the embodiment of the present invention, when releasing the stress generated in the steel-sheathed steel steam pipeline, the steam pipeline body 105 at one end of the telescopic pipeline 1 serves as the body of the steel-sheathed steel steam pipeline, so that the stress release device can be directly welded to the steam pipeline for use. Or a connecting pipe 106 with the same layout as the other end can be arranged at one end of the telescopic pipeline 1 for use, so that the telescopic pipeline 1 can be installed between two steam pipelines. The adsorption buffer ribs 107 inside the connecting pipe 106 and the steam pipeline body 105 can buffer the vibration generated by the unstable internal steam flow in the steel-sheathed steel steam pipeline. The elastic materials of the adsorption buffer ribs 107 evenly distributed in multiple places absorb most of the vibration, reducing the problem of unstable connection of the stress release device caused by vibration. When the stress changes due to thermal expansion and contraction inside the telescopic pipeline 1, the telescopic member on the telescopic pipeline 1 undergoes telescopic changes to release the stress. At the same time, the sealing slide plate 104 slides on the inner side of the telescopic pipeline 1, and the two limit rings 103 limit its movement path to prevent impurities generated in the steam from entering the inside of the telescopic member, ensuring the normal telescopic changes of the telescopic member. The thermal insulation protection layer 102 is installed on the outer sides of the two positioning ring plates 101 to perform thermal insulation treatment on the outer side of the telescopic pipeline 1, reducing the problem of temperature loss in this part of the telescopic pipeline 1 and ensuring the efficient operation of the entire pipeline system.

[0023] Embodiment 2. On the basis of Embodiment 1, four positioning side plates 2 are installed at the middle position outside the telescopic pipe 1. The positioning side plates 2 penetrate through the outside of the thermal insulation protection layer 102. Four evenly distributed traction plates 201 are installed outside the positioning ring plate 101. The positions of the traction plates 201 and the positioning side plates 2 are on the same straight line. A guiding slide bar 202 is installed outside the positioning side plate 2. Among them, a limiting convex block is installed outside the guiding slide bar 202. The outer end of the guiding slide bar 202 is slidably installed on the traction plate 201. A rotating gear 203 is rotatably installed inside the positioning side plate 2. An adjusting screw rod 204 is fixedly installed at the middle position of the rotating gear 203. Threads are provided on the outside of the adjusting screw rod 204. The adjusting screw rod 204 penetrates through both sides of the positioning side plate 2, and the adjusting screw rod 204 slidably penetrates through the side surface of the traction plate 201. A driving ring 205 is rotatably installed outside the thermal insulation protection layer 102. The driving ring 205 is of an annular structure, and a serrated structure is provided on the outside of the driving ring 205. The serrated structure meshes with the outside of the rotating gear 203. Two guiding wheels 206 are installed on the threads outside the adjusting screw rod 204. A traction convex block 207 is installed outside the guiding wheels 206. The two guiding wheels 206 are located on both sides of the traction plate 201. The traction convex block 207 is slidably installed outside the guiding slide bar 202. When releasing the stress generated by the steel-sheathed steel steam pipe, in the initial installation stage, the driving ring 205 is rotated outside the thermal insulation protection layer 102. The driving ring 205 rotates inside the positioning side plate 2. The serrated structure outside the driving ring 205 meshes and drives the rotating gear 203 to rotate. The rotating gear 203 drives the adjusting screw rod 204 to move. Then the rotation of the adjusting screw rod 204 drives the two guiding wheels 206 to move, so that the outside of the guiding wheels 206 drives the traction convex block 207 to slide outside the guiding slide bar 202, so that the two guiding wheels 206 limit the traction plate 201. One driving ring 205 can drive the four rotating gears 203 to move, and at the same time complete the simultaneous adjustment of different parts of the stress release device, and the adjustment amplitude is the same, preventing the problem of deviation during stress release in the later stage. The telescopic pipe 1 drives the positioning ring plate 101 to expand and contract for stress release, then the positioning ring plate 101 drives the traction plate 201 to slide outside the adjusting screw rod 204 and the guiding slide bar 202, and the expansion and contraction amplitudes are the same, improving the effect of pipeline stress release and the service life of the steam pipeline.

[0024] Embodiment 3. On the basis of Embodiment 1, guide rings 3 are installed on the inner sides of both ends of the telescopic pipe 1. A rotating ring 301 is rotatably installed on the outer side of the guide ring 3 and the inner side of the telescopic pipe 1. The rotating ring 301 is of an annular structure, and a plurality of evenly distributed flow guiding plates 302 are installed on the inner side of the rotating ring 301. An active inner plate 303 is installed on one side of the rotating ring 301. A cleaning blade 304 is provided on the outer side surface of the active inner plate 303. The cleaning blade 304 contacts the inner side of the telescopic pipe 1 and the inner side wall of the sealing slide plate 104. An adjustment chute 305 is formed on the side surface of the active inner plate 303. A connecting slide rod 306 is slidably installed inside the adjustment chute 305. The two ends of the connecting slide rod 306 are provided with limit bumps. When releasing the stress generated by the steel-sheathed steel steam pipe, when the steam flows inside the telescopic pipe 1, the steam flow will drive the flow guiding plate 302 to move, then the flow guiding plate 302 drives the rotating ring 301 to rotate along the guide ring 3, and then the rotating ring 301 drives the active inner plate 303 on the side to rotate synchronously. The cleaning blade 304 on the outer side of the active inner plate 303 cleans the impurities on the inner side wall of the telescopic pipe 1, which can reduce the flow resistance, improve the steam transmission efficiency, and reduce the energy consumption. When the telescopic pipe 1 has telescopic changes, the two rotating rings 301 drive the active inner plate 303 to move, and then the connecting slide rod 306 moves inside the adjustment chute 305 to position the movement of the two active inner plates 303 and ensure the integrity of the cleaning.

[0025] Working principle: The driving ring 205 meshes with and drives the rotating gear 203 to rotate under the rotation of the outer side of the heat preservation and protection layer 102. The rotating gear 203 drives the adjusting screw 204 to rotate to move the two guide wheels 206. The guide wheels 206 drive the traction bumps 207 to slide on the outer side of the guide slide rod 202. One driving ring 205 can drive four rotating gears 203 to move, simultaneously adjusting different parts of the stress release device at the same time, and the adjustment amplitude is the same. The adsorption buffer ribs 107 inside the connecting pipe 106 and the steam pipe body 105 can buffer the vibration generated by the unstable steam flow. When the stress changes due to thermal expansion and contraction inside the telescopic pipe 1, the expansion and contraction parts on the telescopic pipe 1 undergo expansion and contraction changes to release stress. The telescopic pipe 1 drives the positioning ring plate 101 to expand and contract, and then the positioning ring plate 101 drives the traction plate 201 to slide on the outer sides of the adjusting screw 204 and the guide slide rod 202, with the same expansion and contraction amplitude, improving the effect of pipe stress release. When the steam flows inside the telescopic pipe 1, it will drive the flow guiding plate 302 to move. The flow guiding plate 302 drives the rotating ring 301 to rotate along the guide ring 3, and the rotating ring 301 drives the active inner plate 303 on the side to rotate synchronously to clean the impurities on the inner side wall of the telescopic pipe 1, which can reduce the flow resistance and improve the steam transmission efficiency.

[0026] In this article, the following points need to be noted: 1. The accompanying drawings of the embodiments of the present invention only relate to the structures involved in the embodiments of the present invention, and other structures can refer to the general design.

[0027] 2. Without conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other to obtain new embodiments.

[0028] The above is only the specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention can easily think of changes or substitutions, which should be covered by the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

1. A stress release device for a steel-in-steel steam pipeline, comprising a telescopic pipeline (1), two positioning ring plates (101) being installed on the outer side of the telescopic pipeline (1), and a thermal insulation protective layer (102) being installed between the two positioning ring plates (101), characterized in that: Four positioning side plates (2) are installed at the middle position of the outer side of the telescopic pipe (1), and the positioning side plates (2) penetrate the outer side of the thermal insulation protective layer (102). Four evenly distributed traction plates (201) are installed at the outer side of the positioning ring plate (101), and the traction plates (201) and the positioning side plates (2) are located on the same straight line. A guide slide bar (202) is installed at the outer side of the positioning side plate (2), wherein a limit block is installed at the outer side of the guide slide bar (202), and the outer end of the guide slide bar (202) is slidably installed on the traction plate (201). A rotating gear (203) is rotatably installed on the inner side of the positioning side plate (2), and an adjusting screw (204) is fixedly installed at the middle position of the rotating gear (203), and the outer side of the adjusting screw (204) is provided with a thread, and the adjusting screw (204) penetrates both sides of the positioning side plate (2), and the adjusting screw (204) also slides through the side of the traction plate (201).

2. A stress relief device for a steel-jacketed steel steam pipeline according to claim 1, characterized in that: The inner edge positions of both ends of the telescopic pipe (1) are inclined structures, a telescopic member is provided on the outer side of the telescopic pipe (1), and a thermal insulation material is filled between the inner side of the thermal insulation protective layer (102) and the outer side of the telescopic pipe (1).

3. A stress relief device for a steel-jacketed steel steam pipeline according to claim 2, characterized in that: Two limiting rings (103) are installed on the inner side of the telescopic pipe (1), and a sealing slide plate (104) is also slidably installed on the inner side of the telescopic pipe (1). The sealing slide plate (104) is located on the inner side of the telescopic part on the telescopic pipe (1), and the sealing slide plate (104) is also slidably installed between the two limiting rings (103).

4. A stress relief device for a steel-jacketed steel steam pipeline according to claim 3, characterized in that: A steam pipe body (105) is welded and installed on the outer side of one end of the telescopic pipe (1) and the outer side of a positioning ring plate (101), and a connecting pipe (106) is welded and installed on the other end of the telescopic pipe (1) and the outer side of another positioning ring plate (101), and a flange is installed on the side end of the connecting pipe (106).

5. A stress relief device for a steel-jacketed steel steam pipeline according to claim 4, characterized in that: Adsorption buffer ribs (107) are installed on the inner sides of the steam pipe body (105) and the connecting pipe (106), and a driving ring (205) is rotatably installed on the outer side of the thermal insulation protective layer (102).

6. A stress relief device for a steel-jacketed steel steam pipeline according to claim 5, characterized in that: The outer side of the driving ring (205) is provided with a sawtooth structure, which meshes with the outer side of the rotating gear (203), and two guide wheels (206) are installed on the threads on the outer side of the adjusting screw (204).

7. A stress relief device for a steel-jacketed steel steam pipeline according to claim 6, characterized in that: A traction protrusion (207) is installed on the outer side of the guide wheel (206), and the two guide wheels (206) are located on both sides of the traction plate (201). The traction protrusion (207) is slidably installed on the outer side of the guide slide bar (202).

8. The stress relief device for a steel-jacketed steel steam pipeline according to claim 7, characterized in that: Guide rings (3) are installed on the inner sides of both ends of the telescopic pipe (1), rotating rings (301) are rotatably installed on the outer sides of the guide rings (3) and the inner sides of the telescopic pipe (1), and a plurality of evenly distributed guide plates (302) are installed on the inner sides of the rotating rings (301).

9. A stress relief device for a steel-jacketed steel steam pipeline according to claim 8, characterized in that: A movable inner plate (303) is installed on one side of the rotating ring (301), and a cleaning blade (304) is provided on the outer side of the movable inner plate (303). The cleaning blade (304) is in contact with the inner side of the telescopic pipe (1) and the inner side wall of the sealing slide plate (104).

10. A stress relief device for a steel-jacketed steel steam pipeline according to claim 9, characterized in that: An adjusting slide groove (305) is provided on the side of the movable inner plate (303), a connecting slide rod (306) is slidably mounted inside the adjusting slide groove (305), and limiting protrusions are provided at both ends of the connecting slide rod (306).

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