Protection structure for high-pressure valve pipeline outside unit furnace

Abstract

The utility model discloses a protection structure for a high-pressure valve pipeline outside a furnace of a unit, which relates to the technical field of pipeline protection and comprises a pipeline outside the furnace, an elbow, a three-way joint and a high-pressure ball valve, and a first straight pipe protection component and a second straight pipe protection component are detachably mounted on the pipeline outside the furnace. The elbow and the three-way joint are detachably provided with an elbow protection assembly and a three-way protection assembly respectively, and the first straight pipe protection assembly, the second straight pipe protection assembly, the elbow protection assembly and the three-way protection assembly respectively comprise two protection shells, two lining plates, two heat insulation materials and a plurality of spring telescopic rods which are distributed in a mirror image mode. The first straight pipe protection assembly, the second straight pipe protection assembly, the bent pipe protection assembly and the three-way protection assembly can be used for protecting pipelines, elbows and three-way connectors outside the furnace, so that the problems that the surfaces of the pipelines are rusted and thinned seriously are effectively reduced, and the service life of high-pressure valve pipelines outside the furnace of a unit is prolonged.

Description

Technical Field

[0001] The present application relates to the technical field of pipeline protection, and in particular to a protection structure for a high-pressure valve pipeline outside a unit furnace. Background Art

[0002] At present, the boiler units in thermal power plants need to replace the small-diameter pipes on the furnace side in accordance with the countermeasure requirement that "during the maintenance of the units, the drain, air and other pipes that are prone to cause steam-water two-phase flow should be inspected in particular for cracks and erosion at the elbows connected to the main pipe. The pipes, elbows, tees and valves should be replaced in conjunction with the maintenance after 10,000 hours of operation." During the maintenance process in the past two years, it was found that the surface of some pipes outside the furnace, such as the cooling water pipe, was severely corroded and thinned.

[0003] During the maintenance process in the past two years, it was found that the surface of some external furnace pipes, such as the cooling water pipes, were severely corroded and thinned, and there was no protective structure, which greatly reduced the service life of the external furnace pipes. Once a leakage or other fault occurs during operation, the unit will inevitably be forced to shut down, affecting production. In response to the above problems, the inventor proposed a protective structure for the external high-pressure valve pipe of the unit to solve the above problems. Summary of the Invention

[0004] In order to solve the problem that some existing high-pressure valve pipelines outside the furnace of some units are severely rusted and thinned after long-term use and have no protective structure; the purpose of this utility model is to provide a protective structure for the high-pressure valve pipeline outside the furnace of the unit.

[0005] In order to solve the above technical problems, the utility model adopts the following technical solutions: a high-pressure valve pipeline protection structure outside the furnace of the unit, including an outside furnace pipeline, an elbow, a tee joint, and a high-pressure ball valve. The outside furnace pipeline is connected together through the elbow and the tee joint, and the high-pressure ball valve is detachably installed on the outside furnace pipeline. The first straight pipe protection assembly and the second straight pipe protection assembly are detachably installed on the outside furnace pipeline, and the elbow and the tee joint are respectively detachably installed with the bent pipe protection assembly and the tee protection assembly. The first straight pipe protection assembly, the second straight pipe protection assembly, the bent pipe protection assembly, and the tee protection assembly respectively include two mirror-distributed protective shells, two lining plates, two thermal insulation materials, and multiple spring telescopic rods.

[0006] In a possible implementation, two corresponding protective shells among the multiple protective shells can be assembled and mounted on the corresponding external furnace pipes, elbows, and tee joints by fastening bolts.

[0007] In a possible implementation, multiple lining plates are fixedly installed in corresponding protective shells through corresponding spring telescopic rods, and the corresponding two lining plates can fit together.

[0008] In a possible implementation, multiple thermal insulation materials are pasted into corresponding lining plates, and the thermal insulation materials can be in contact with the surfaces of corresponding external furnace pipes, elbows, and tee joints.

[0009] In a possible implementation, a threaded rod is threadedly mounted on one side of each of the two protective shells in the first straight tube protection assembly, and a knob and a support foot are fixedly mounted on the upper and lower ends of the threaded rod respectively.

[0010] Compared with the prior art, the beneficial effects of the present invention are:

[0011] 1. In the present invention, the first straight pipe protection assembly, the second straight pipe protection assembly, the elbow protection assembly, and the tee protection assembly can be used to protect the furnace external pipeline, elbow, and tee joint, thereby effectively reducing the problems of pipeline surface corrosion and serious thinning, and prolonging the service life of the unit's furnace external high-pressure valve pipeline;

[0012] 2. In the present invention, after the pipe protection assembly is installed, the knob is used to drive the threaded rod to rotate, and the threaded rod drives the support foot to descend and contact the ground, which can support the external furnace pipe close to the ground, and is used to ensure the stability of the external furnace pipe during operation and prevent displacement or damage due to vibration or thermal expansion. These structures are usually made of metal. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0014] Figure 1 This is a schematic diagram of the overall structure of the utility model;

[0015] Figure 2 This is a schematic diagram of the pipeline connection structure of the utility model;

[0016] Figure 3 This is a schematic diagram of the cross-sectional structure of the first straight pipe protection component of the present utility model.

[0017] In the figure: 1. First straight pipe protection assembly; 101. Protection shell; 102. Lining plate; 103. Insulation material; 104. Spring telescopic rod; 2. Second straight pipe protection assembly; 3. Bend pipe protection assembly; 4. Tee protection assembly; 5. Threaded rod; 6. Knob; 7. Support foot; 8. High-pressure ball valve; 9. Out-of-furnace pipeline; 10. Elbow; 11. Tee joint. DETAILED DESCRIPTION

[0018] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0019] Example: Figure 1-3 As shown, the utility model provides a high-pressure valve pipeline protection structure outside the furnace of the unit, including an outside furnace pipeline 9, an elbow 10, a three-way joint 11, and a high-pressure ball valve 8. The outside furnace pipeline 9 is connected together through the elbow 10 and the three-way joint 11, and the high-pressure ball valve 8 is detachably installed on the outside furnace pipeline 9. The first straight pipe protection component 1 and the second straight pipe protection component 2 are detachably installed on the outside furnace pipeline 9. The elbow 10 and the three-way joint 11 are respectively detachably installed with a bent pipe protection component 3 and a three-way protection component 4. The first straight pipe protection component 1, the second straight pipe protection component 2, the bent pipe protection component 3, and the three-way protection component 4 respectively include two mirror-distributed protective shells 101, two lining plates 102, two thermal insulation materials 103, and multiple spring telescopic rods 104.

[0020] In the embodiment of the present application, the off-furnace pipe 9 is the off-furnace high-pressure valve pipe of the unit. The off-furnace high-pressure valve pipe of the unit in the boiler unit in the current thermal power plant is usually connected together through an elbow 10 and a tee joint 11. By replacing the PCV valve on the off-furnace pipe 9 of the unit with an imported high-pressure ball valve 8, the problem of frequent leakage, disintegration and grinding of the PCV valve, which leads to serious thinning of the hard alloy layer on the joint surface of the valve core and the valve seat, is solved. The first straight pipe protection component 1, the second straight pipe protection component 2, the elbow protection component 3, and the tee protection component 4 can be used to protect the off-furnace pipe 9, the elbow 10, and the tee joint 11, thereby effectively reducing the problem of serious corrosion and thinning of the pipeline surface, and improving the service life of the off-furnace high-pressure valve pipe of the unit.

[0021] In a possible embodiment, two corresponding protective shells 101 among the multiple protective shells 101 can be assembled and mounted on the corresponding external furnace pipe 9 , elbow 10 , and tee joint 11 by fastening bolts.

[0022] By adopting the above technical solution, the protective shell 101 is used to protect the external furnace pipe 9, elbow 10, and tee joint 11 from external physical damage, such as collision, scratches, etc. They can be made of metal or other durable materials and assembled by splicing to facilitate installation and disassembly of the pipeline for maintenance.

[0023] In a possible embodiment, the plurality of lining plates 102 are fixedly installed in the corresponding protective shell 101 through corresponding spring telescopic rods 104, and the corresponding two lining plates 102 can fit together.

[0024] By adopting the above technical solution and utilizing the elastic force of the spring telescopic rod 104 , the corresponding two liner plates 102 are fitted together to form a complete circular tube, thereby further protecting the pipeline.

[0025] In a possible embodiment, a plurality of thermal insulation materials 103 are pasted into the corresponding lining plate 102 , and the thermal insulation materials 103 can be in contact with the surfaces of the corresponding external furnace pipes 9 , elbows 10 , and tee joints 11 .

[0026] By adopting the above technical solution, the elastic force of the spring telescopic rod 104 is utilized to make the corresponding two lining plates 102 drive the thermal insulation material 103 to fit together, thereby fully covering and protecting the external furnace pipe 9, elbow 10, and three-way joint 11. The thermal insulation material 103 is used to reduce heat transfer and protect the external furnace pipe 9, elbow 10, and three-way joint 11 from the influence of high temperature. This is usually achieved by using thermal insulation materials such as rock wool, ceramic fiber, etc., which have good thermal insulation properties and high temperature resistance.

[0027] In a possible implementation, a threaded rod 5 is threadedly mounted on one side of each of the two protective shells 101 in the first straight tube protection assembly 1 , and a knob 6 and a support foot 7 are fixedly mounted on the upper and lower ends of the threaded rod 5 , respectively.

[0028] By adopting the above technical solution, the first straight pipe protection assembly 1 can be installed on the external furnace pipe 9 close to the ground. After the installation is completed, the knob 6 is used to drive the threaded rod 5 to rotate, and the threaded rod 5 drives the support foot 7 to descend and contact the ground, which can support the external furnace pipe 9 to ensure the stability of the external furnace pipe 9 during operation and prevent displacement or damage due to vibration or thermal expansion. These structures are usually made of metal.

[0029] Working principle: When the utility model is in use, the first straight pipe protection component 1, the second straight pipe protection component 2, the elbow protection component 3, and the three-way protection component 4 can be used to protect the furnace pipe 9, the elbow 10, and the three-way joint 11. The protective shell 101 is used to protect the furnace pipe 9, the elbow 10, and the three-way joint 11 from external physical damage, such as collision, scratches, oxidation, etc. They can be made of metal or other durable materials. They are assembled and arranged by splicing to facilitate installation and disassembly for maintenance of the pipeline. The elastic force of the spring telescopic rod 104 is used to make the corresponding two lining plates 102 drive the thermal insulation material 103 to fit each other, fully covering the furnace pipe 9, the elbow 10, and the three-way joint 11. The thermal insulation material 10 3 is used to reduce heat transfer and protect the external furnace pipe 9, elbow 10, and tee joint 11 from the influence of high temperature. This is usually achieved by using thermal insulation materials such as rock wool, ceramic fiber, etc. These materials have good thermal insulation properties and high temperature resistance, thereby effectively reducing the problems of serious corrosion and thinning of the pipeline surface and improving the service life of the unit's external furnace high-pressure valve pipeline. After the pipeline protection component is installed, the knob 6 is used to drive the threaded rod 5 to rotate, and the threaded rod 5 drives the support foot 7 to descend and contact the ground, which can support the external furnace pipe 9 close to the ground, and is used to ensure the stability of the external furnace pipe 9 during operation and prevent displacement or damage due to vibration or thermal expansion. These structures are usually made of metal.

[0030] Obviously, those skilled in the art may make various modifications and variations to the present invention without departing from the spirit and scope of the present invention. Thus, if such modifications and variations fall within the scope of the claims of the present invention and their equivalents, the present invention is intended to include such modifications and variations.

Claims

1. A protection structure for a high-pressure valve pipeline outside a furnace of a unit, comprising an outside furnace pipeline (9), an elbow (10), a three-way joint (11), and a high-pressure ball valve (8), characterized in that: The external furnace pipeline (9) is connected together via an elbow (10) and a three-way joint (11), and a high-pressure ball valve (8) is detachably mounted on the external furnace pipeline (9). A first straight pipe protection assembly (1) and a second straight pipe protection assembly (2) are detachably mounted on the external furnace pipeline (9). The elbow (10) and the three-way joint (11) are respectively detachably mounted with a bent pipe protection assembly (3) and a three-way protection assembly (4). The first straight pipe protection assembly (1), the second straight pipe protection assembly (2), the bent pipe protection assembly (3), and the three-way protection assembly (4) respectively comprise two protective shells (101) distributed in a mirror image, two lining plates (102), two heat insulation materials (103), and a plurality of spring telescopic rods (104).

2. A protection structure for high-pressure valves and pipelines outside a unit furnace as claimed in claim 1, characterized in that: Two corresponding protective shells (101) among the plurality of protective shells (101) can be assembled and sleeved on the corresponding external furnace pipe (9), elbow (10), and tee joint (11) by fastening bolts.

3. The protection structure for high-pressure valves and pipelines outside the furnace of a unit according to claim 1, characterized in that: The plurality of lining plates (102) are fixedly mounted in the corresponding protective shell (101) via corresponding spring telescopic rods (104), and the two corresponding lining plates (102) can fit together.

4. The protection structure for high-pressure valves and pipelines outside the furnace of a unit according to claim 1, characterized in that: The plurality of heat-insulating materials (103) are all pasted in the corresponding lining plates (102), and the heat-insulating materials (103) can be in contact with the surfaces of the corresponding external furnace pipes (9), elbows (10), and three-way joints (11).

5. The protection structure for high-pressure valves and pipelines outside the furnace of a unit according to claim 1, characterized in that: A threaded rod (5) is threadedly mounted on one side of each of the two protective shells (101) in the first straight pipe protection assembly (1), and a knob (6) and a support foot (7) are fixedly mounted on the upper and lower ends of the threaded rod (5), respectively.

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