Three-way limiting device of large-pipe-diameter high-temperature steam horizontal pipeline
By designing a three-way limiting device, the thermal displacement of the high-temperature steam pipeline is limited only in the X, Y, and Z directions, which solves the problems of difficult construction and high cost of existing supports, and achieves the effect of simplifying construction and reducing costs.
Patent Information
- Application Number
- CN202520002996.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-02
- Publication Date
- 2026-01-30
- Estimated Expiration
- 2035-01-02
AI Technical Summary
Due to the large thermal displacement of high-temperature steam pipelines in thermal power plants, existing fixed supports require large torques and are complex, leading to construction difficulties and high costs.
Design a three-way limiting device that restricts thermal displacement in only the X, Y, and Z directions. The pipe is clamped by an arc-shaped clamp and a limiting frame, allowing axial movement due to thermal expansion and contraction. Friction ridges are provided between the limiting groove and the limiting protrusion to buffer thermal displacement.
It achieves effective pipeline limiting, simplifies construction and infrastructure, reduces costs, and protects pipelines from damage due to thermal expansion and contraction.
Smart Images
Figure CN223855025U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to a kind of limiting devices of high-temperature steam pipeline, for the fixation of high-temperature steam pipeline in thermal power plant. BACKGROUND
[0002] Steam pipeline of thermal power plant generally adopts natural compensation pipeline layout, in order to ensure the stability of pipeline, reduce the displacement too large caused by pipeline overall transmission, damage pipeline, generally fixed support is set in proper position.But, due to steam pipeline pipe diameter, temperature is high, there is large thermal displacement and angular displacement is relatively large, need to use torque particularly big and relatively complex fixed support, this leads to civil support pier foundation too large, construction difficulty, cost is high. SUMMARY
[0003] The utility model provides a kind of three-way limiting device of large pipe diameter high-temperature steam horizontal pipeline to solve the above technical problem, only limit X, Y, Z three directions of thermal displacement without limiting angular displacement, and along the certain thermal displacement space of this direction that pipeline generates due to thermal expansion and contraction is left, unlike existing fixed support, the utility model only generates horizontal force, does not generate torque, not only can reach better limiting effect, simultaneously still can simplify the quantity of limiting device and the size of civil support pier foundation, construction is convenient, cost is low.
[0004] To solve the above technical problem, the technical scheme adopted by the utility model is:
[0005] A kind of three-way limiting device of large pipe diameter high-temperature steam horizontal pipeline, including the clamping pipe seat of the pipe being clamped by arc clamp, the bottom plate being fixed to the bottom of clamping pipe seat and the limiting frame being fixed to support pier for fixing bottom plate;
[0006] The limiting frame includes the steel plate being fixed to support pier, the left and right sides of the top of steel plate are provided with horizontal limiting baffle for preventing the horizontal movement of bottom plate along the axial direction of pipeline, the side of the top of horizontal limiting baffle towards bottom plate is provided with vertical limiting baffle for preventing the vertical movement of bottom plate, the bottom of vertical limiting baffle is provided with limiting protrusion that is protruded downward, and the top of bottom plate is provided with limiting slot that is matched with limiting protrusion, and the inner surface of limiting slot is uniformly distributed with multiple friction ridges;The front and rear sides of the top of steel plate are detachably provided with front and rear limiting baffle allowing the front and rear movement of a certain distance of bottom plate due to thermal expansion and contraction of pipeline along the axial direction of pipeline, the bottom of front and rear limiting baffle is T-shaped, and T-shaped sliding slot is correspondingly provided on steel plate, to facilitate the installation and disassembly of front and rear limiting baffle;
[0007] The pipe wall of the two sides of arc clamp is respectively distributed with a circle of clamping block for preventing the axial movement of semicircular clamp along pipeline.
[0008] The further improvement in the utility model technical scheme lies in that the bottom plate is fixed at the bottom of the support, and the fixing mode is welding.
[0009] The further improvement in the utility model technical scheme lies in that the bottom plate is fixed at the bottom of the support, and the fixing mode is welding.
[0010] The further improvement in the utility model technical scheme lies in that the bottom plate is fixed at the bottom of the support, and the fixing mode is welding.
[0011] The further improvement in the utility model technical scheme lies in that the cross section of the limiting groove and the limiting convex is triangle, semicircle or square.
[0012] The further improvement in the utility model technical scheme lies in that the cross section of the limiting groove and the limiting convex is triangle, semicircle or square.
[0013] The further improvement in the utility model technical scheme lies in that the number of the clamping blocks in each circle is 4-6.
[0014] The further improvement in the utility model technical scheme lies in that the cross section of the limiting groove and the limiting convex is triangle, semicircle or square.
[0015] The utility model only limits the thermal displacement of X, Y and Z three directions and does not limit the angular displacement, and a certain thermal displacement of the pipeline in the direction due to thermal expansion and cold shrink is left along the pipeline direction, which not only can reach better limiting effect, but also can simplify the number of the limiting device and the size of the civil support foundation, is convenient for construction and has low cost.
[0016] The further improvement in the utility model technical scheme lies in that the cross section of the limiting groove and the limiting convex is triangle, semicircle or square.
[0017] The further improvement in the utility model technical scheme lies in that the cross section of the limiting groove and the limiting convex is triangle, semicircle or square.
[0018] The front and rear limiting baffle plates and the bottom plate have a certain distance, and the limiting device plays a limiting role when moving axially due to thermal expansion and cold contraction of the pipeline, can uniformly transmit the axial thermal movement (i.e. Y direction) of the pipeline due to thermal expansion and cold contraction to all the limiting devices on the pipeline, makes the axial thermal movement more uniform, and is beneficial to protecting the pipeline. Meanwhile, the horizontal limiting baffle plate can play a limiting role on the thermal movement in the left-right direction (i.e. X direction), and the vertical limiting baffle plate plays a limiting role on the thermal movement in the vertical direction (i.e. Z direction), and plays a limiting role on the thermal displacement in the X, Y and Z directions. BRIEF DESCRIPTION OF DRAWINGS
[0019] Figure 1 is a structure schematic diagram of the utility model after installation;
[0020] Figure 2 is another angle structure schematic diagram of the utility model after installation;
[0021] Figure 3 is a partial enlarged view of A in the utility model; Figure 1
[0022] Figure 4 is a partial enlarged view of C in the utility model; Figure 2
[0023] Figure 5 is a structure schematic diagram of the bottom plate of the utility model;
[0024] Figure 6 is a partial enlarged view of B in the utility model; Figure 5
[0025] Figure 7 is a structure schematic diagram of the clamp type pipe base of the utility model;
[0026] Wherein, 1, clamp type pipe base, 1-1, upper arc clamp, 1-2, support, 1-3, mounting hole, 1-4, lower arc clamp, 2, bottom plate, 2-1, limiting groove, 2-2, friction convex rib, 3, horizontal limiting baffle plate, 4, vertical limiting baffle plate, 4-1, limiting convex, 5, steel plate, 6, clamping block, 7, pipeline, 8, buttress, 9, front and rear limiting baffle plate. DETAILED DESCRIPTION
[0027] The utility model will be further explained in detail in combination with examples:
[0028] The X, Y and Z directions referred to by the utility model are as follows: the X direction is the horizontal direction of the pipeline left and right movement, the Y direction is the axial direction of the pipeline, and the Z direction is the vertical direction.
[0029] For example, Figure 1 and 2 As shown, a three-way limiting device for a large-diameter high-temperature steam horizontal pipeline includes a clamp-type pipe seat 1 that clamps the pipe 7 with an arc-shaped clamp, a base plate 2 fixed to the bottom of the clamp-type pipe seat 1, and a limiting frame fixed to the support 8 for fixing the base plate 2.
[0030] like Figure 7 As shown, the clamp-type pipe seat 1 includes an upper arc-shaped clamp 1-1 and a lower arc-shaped clamp 1-4 for clamping the pipe 7. Both the upper arc-shaped clamp 1-1 and the lower arc-shaped clamp 1-4 include two arc-shaped plates connected together in the middle. The two ends of the arc-shaped plates extend to both sides to form mounting portions, and mounting holes 1-3 are provided on the mounting portions. The upper arc-shaped clamp 1-1 and the lower arc-shaped clamp 1-4 are fastened to the pipe 7 and fixed with bolts. The upper and lower arc-shaped clamps are two arc-shaped plates connected together in the middle, with gaps on both sides. This structure of the arc-shaped clamp clamps holds the pipe without restricting the angular displacement of the pipe, satisfying the clamping effect while reducing cost and weight of the arc-shaped clamps while ensuring strength. A support 1-2 is provided at the bottom of the lower arc-shaped clamp 1-4 for support.
[0031] A ring of locking blocks 6 is evenly distributed on the pipe wall on both sides of the upper and lower arc-shaped clamps to prevent the semi-circular clamps from moving along the axial direction of the pipe 7. The number of locking blocks 6 in each ring is generally 4 to 6.
[0032] The support 1-2 has a base plate 2 at its bottom, which is generally fixed by welding. The base plate 2 is limited in the X, Y, and Z directions by a limiting frame. The specific structure is as follows:
[0033] The limiting frame includes a steel plate 5 fixed to the support 8, which is welded to the embedded part of the support 8. Horizontal limiting baffles 3 are provided on the top of the steel plate 5 along the left and right sides of the pipeline axial direction (X direction) to prevent the base plate 2 from moving in the X direction. A vertical limiting baffle 4 is provided on the side of the top of the horizontal limiting baffle 3 facing the base plate 2 to prevent the base plate 2 from moving vertically (Z direction). The horizontal limiting baffle 3 and the vertical limiting baffle 4, and the horizontal limiting baffle 3 and the steel plate 5 are fixed by welding. The bottom of the vertical limiting baffle 4 has a downwardly protruding limiting protrusion 4-1, and the top of the base plate 2 has a limiting groove 2-1 that matches the limiting protrusion 4-1. The specific structure is as follows: Figure 3 , 5As shown in FIGS. 6, the cross sections of the limiting groove 2-1 and the limiting protrusion 4-1 are triangular, semicircular and square, and the triangular structure is adopted in the embodiment. The pipeline is provided with the clamping block, and the limiting groove and the limiting protrusion between the bottom plate and the vertical limiting baffle can make the limiting device move along the axial direction of the pipeline, transfer the axial thermal movement of the pipeline caused by thermal expansion and cold contraction to the axial movement of the entire limiting device, prevent the axial movement of the pipeline in the arc clamp, and prevent the pipeline from being scratched due to long-term use. The inner surface of the limiting groove 2-1 is uniformly distributed with multiple friction ridges 2-2, which can improve the friction force of the limiting protrusion in the axial direction and play a buffering role.
[0034] The front and rear sides of the top of the steel plate 5 along the axial direction of the pipeline, i.e. the two sides in the Y direction, are detachably provided with front and rear limiting baffles 9. The bottom of the front and rear limiting baffles 9 is T-shaped, and the steel plate 5 is correspondingly provided with a T-shaped sliding groove, as shown in FIG. Figure 4 The front and rear limiting baffles 9 are convenient to install and detach.
[0035] The front and rear limiting baffles 9 are a certain distance away from the bottom plate 2, which can allow the bottom plate 2 to move a certain distance forward and backward due to the thermal expansion and cold contraction of the pipeline, and at the same time, play a limiting role, can uniformly transfer the axial thermal movement of the pipeline caused by thermal expansion and cold contraction, i.e. the movement in the Y direction, to all limiting devices on the pipeline, make the axial thermal movement more uniform, and be beneficial to protect the pipeline.
Claims
1. A three-way limiting device for large-diameter high-temperature steam horizontal pipelines, characterized in that: The clamp pipe base (1) includes an arc clamp for clamping the pipeline (7), a bottom plate (2) fixed to the bottom of the clamp pipe base (1), and a limiting frame fixed to the pier (8) for fixing the bottom plate (2); The limiting frame includes a steel plate (5) fixed to the pier (8), the left and right sides of the top of the steel plate (5) in the axial direction of the pipeline are provided with horizontal limiting stop plates (3) for preventing the horizontal movement of the bottom plate (2), the side of the top of the horizontal limiting stop plate (3) towards the bottom plate (2) is provided with a vertical limiting stop plate (4) for preventing the vertical movement of the bottom plate (2), the bottom of the vertical limiting stop plate (4) is provided with a downward protruding limiting protrusion (4-1), and the top of the bottom plate (2) is provided with a limiting groove (2-1) matched with the limiting protrusion (4-1), the inner surface of the limiting groove (2-1) is uniformly distributed with multiple friction ridges (2-2); the front and rear sides of the top of the steel plate (5) in the axial direction of the pipeline are detachably provided with front and rear limiting stop plates (9) allowing the front and rear movement of the bottom plate (2) by a certain distance due to the thermal expansion and contraction of the pipeline, the bottom of the front and rear limiting stop plates (9) is T-shaped and has a certain distance from the bottom plate (2), and the steel plate (5) is correspondingly provided with a T-shaped sliding groove for facilitating the installation and removal of the front and rear limiting stop plates (9). The pipeline wall on both sides of the arc clamp is respectively and uniformly distributed with a ring of clamping blocks (6) for preventing the axial movement of the semicircular clamp along the pipeline (7).
2. The three-way limiting device for large-diameter high-temperature steam horizontal pipelines according to claim 1, characterized in that: The clamp pipe base (1) includes an upper arc clamp (1-1) and a lower arc clamp (1-4) for clamping the pipeline (7) through bolts, and a support (1-2) at the bottom of the lower arc clamp (1-4), the upper arc clamp (1-1) and the lower arc clamp (1-4) each include two arc plates connected together in the middle, the two ends of the arc plates extend to both sides to form mounting portions, and the mounting portions are provided with mounting holes (1-3) for bolt fixation.
3. A three-way limiting device for large-diameter high-temperature steam horizontal pipes according to claim 2, characterized in that: The bottom plate (2) is fixed to the bottom of the support (1-2) by welding.
4. A three-way limiting device for large-diameter high-temperature steam horizontal pipes according to claim 1, characterized in that: The steel plate (5) is welded to the embedded part of the pier (8).
5. A three-way limiting device for large-diameter high-temperature steam horizontal pipes according to claim 1, characterized in that: The cross sections of the limiting groove (2-1) and the limiting protrusion (4-1) are triangular, semicircular, or square.
6. A three-way limiting device for large-diameter high-temperature steam horizontal pipes according to claim 1, characterized in that: The fixing mode between the horizontal limiting stop plate (3) and the vertical limiting stop plate (4), and between the horizontal limiting stop plate (3) and the steel plate (5) is welding.
7. A three-way limiting device for large-diameter high-temperature steam horizontal pipes according to claim 1, characterized in that: The number of clamping blocks (6) in each ring is 4-6.