Anti-corrosion surfacing quick-opening blind flange

Abstract

The utility model discloses a corrosion-resistant surfacing quick-opening blind flange which comprises a barrel flange, a safety interlocking mechanism is arranged on one side of the barrel flange, a head cover blind plate connected with the barrel flange is arranged at the lower end of the barrel flange, a hoop is arranged at the bottom of the head cover blind plate, an opening and closing mechanism connected with the barrel flange is arranged at the top of the barrel flange, and a rotating mechanism is arranged on the head cover blind plate. The quick-opening blind plate has the beneficial effects that the whole quick-opening blind plate adopts common carbon steel as a base material, and a layer of nickel-chromium-molybdenum alloy is overlaid on an area in contact with a corrosive medium by adopting a hot wire TIG (Tungsten Inert Gas) method, so that the quick-opening blind plate can be used for the working condition of the corrosive medium, and is low in comprehensive material utilization cost, high in overall economic benefit, simple to operate, quick to open or close, safe and reliable; and a safe self-locking function is achieved, and the blind plate cannot be opened by misoperation under the condition of pressure.

Description

Technical Field

[0001] The utility model relates to the technical field of flange connection, in particular to a quick-opening blind flange with corrosion-resistant surfacing welding. Background Technique

[0002] A blind flange, also known as a blind flange, is a form of flange connection. Its functions are, first, to block the end of the pipeline, and second, to facilitate the removal of debris in the pipeline during maintenance. In terms of the blocking function, it has the same effect as a head and a pipe cap. However, the head cannot be disassembled, while the flange blind is fixed with bolts and can be disassembled very conveniently.

[0003] The corrosion problem of metal pipelines affects the service life of the pipelines. Common anti-corrosion flange and pipeline connection structures generally perform anti-corrosion treatments such as painting anti-corrosion coatings on the inner wall of the pipeline. During the welding process of pipeline connection, the pipeline wall is heated, causing damage to the anti-corrosion layer, affecting the anti-corrosion performance, resulting in corrosion at the pipeline connection and leakage. Especially for pipelines with a smaller diameter, after welding, it is impossible to enter the pipeline interior to perform anti-corrosion construction on the inner wall of the joint part, so the sealing performance of the pipeline cannot be guaranteed. Content of the Utility Model

[0004] The purpose of the utility model is to provide a quick-opening blind flange with corrosion-resistant surfacing welding to solve the problems raised in the above background technique.

[0005] To achieve the above purpose, the utility model provides the following technical solution: A quick-opening blind flange with corrosion-resistant surfacing welding, including a cylinder flange, a safety interlock mechanism is provided on one side of the cylinder flange, a head cover blind is provided at its lower end and is connected thereto, a clamp is provided at the bottom of the head cover blind, an opening and closing mechanism is provided at the top of the cylinder flange and is connected thereto, and a rotating mechanism is provided on the head cover blind.

[0006] Further optimized, the safety interlock mechanism is composed of an interlock pressing plate, a safety bolt and a graphite sealing ring.

[0007] Further optimized, the safety bolt is made of nickel-chromium-molybdenum alloy material.

[0008] Further optimized, a cylinder is provided at the rear end of the head cover blind and the lower end of the cylinder flange and is welded thereto, and nickel-chromium-molybdenum alloy anti-corrosion layers are surfaced on the contact surfaces of the cylinder with the head cover blind and the cylinder flange.

[0009] Further optimized, graphite sealing material is filled between the cylinder flange and the head cover blind.

[0010] Further optimized, the opening and closing mechanism is composed of a connecting plate, a lead screw, a bushing, a locking block, a positioning pin and a bolt.

[0011] Further optimized, the rotating mechanism includes a rotating plate, a rotating shaft, a shaft sleeve, an adjusting bolt, an adjusting block, a backing plate, and a fixing nut, and the rotating plate is fixed to the head cover blind plate by bolts.

[0012] Further optimized, hinge mechanisms are symmetrically arranged on both sides of the lower end of the head cover blind plate, and the hinge mechanisms are composed of hinges and hinge shafts.

[0013] Further optimized, a handle is also provided on the head cover blind plate.

[0014] Beneficial effects

[0015] For the quick-opening blind flange with corrosion-resistant surfacing provided by the present utility model, the entire quick-opening blind flange uses ordinary carbon steel as the base material, and a layer of nickel-chromium-molybdenum alloy is surfaced by the hot wire TIG method in the area in contact with corrosive media. It can be used in working conditions with corrosive media, with low comprehensive material utilization cost, high overall economic efficiency, simple operation, quick opening or closing, safe and reliable, having a safety self-locking function, and the blind plate will not be accidentally opened under pressure. Description of the drawings

[0016] Figure 1 It is a front view schematic diagram of the overall structure of the present utility model;

[0017] Figure 2 It is a side view schematic diagram of the overall structure of the present utility model. Specific embodiments

[0018] The following are specific embodiments of the present utility model in combination with the drawings, and the technical solutions of the present utility model are further described, but the present utility model is not limited to these embodiments.

[0019] Embodiment

[0020] As Figure 1-2 shown, a quick-opening blind flange with corrosion-resistant surfacing includes a cylinder flange 6, a safety interlock mechanism 8 is arranged on one side of the cylinder flange 6, a head cover blind plate 1 is arranged at its lower end and is connected thereto, a clamp 7 is arranged at the bottom of the head cover blind plate 1, an opening and closing mechanism 2 is arranged at the top of the cylinder flange 6, and a rotating mechanism 5 is arranged on the head cover blind plate 1.

[0021] In this embodiment, the safety interlock mechanism 8 is composed of an interlock pressure plate, a safety bolt, and a graphite sealing ring, and has a safety self-locking function, and the blind plate cannot be opened under pressure.

[0022] The safety bolt is made of nickel-chromium-molybdenum alloy material and has excellent corrosion resistance.

[0023] A cylinder is provided at the rear end of the head cover blind plate 1 and the lower end of the cylinder flange 6 and is welded thereto, and nickel-chromium-molybdenum alloy anti-corrosion layers are surfaced on the contact surfaces of the cylinder with the head cover blind plate 1 and the cylinder flange 6.

[0024] A graphite sealing material is filled between the cylinder flange 6 and the head cover blind plate 1. The head cover blind plate can be quickly opened. The cylinder flange 6 and the head cover blind plate 1 are clamped by a clamp 7, and there is a graphite packing seal between the cylinder flange 6 and the head cover blind plate 1.

[0025] The opening and closing mechanism 2 is composed of a connecting plate, a lead screw, a bushing, a locking block, a positioning pin and bolts.

[0026] The rotating mechanism 5 includes a rotating plate, a rotating shaft, a bushing, an adjusting bolt, an adjusting block, a backing plate and a fixing nut, and the rotating plate is fixed to the head cover blind plate 1 by bolts.

[0027] On both sides of the lower end of the head cover blind plate 1, hinge mechanisms 4 are symmetrically arranged. The hinge mechanism is composed of a hinge and a hinge shaft.

[0028] A handle 3 is also provided on the head cover blind plate 1.

[0029] It can be used in working conditions containing corrosive media, with low comprehensive material utilization cost and high overall economic benefits. It is simple to operate, can be opened or closed quickly, is safe and reliable, has a safety self-locking function, and the blind plate will not be accidentally opened under pressure.

[0030] Finally, it should be noted that the above are only the preferred embodiments of the present invention and are not used to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A quick-opening blind flange for corrosion-resistant surfacing welding, characterized in that: It includes a cylinder flange (6). A safety interlock mechanism (8) is provided on one side of the cylinder flange (6). A head cover blind plate (1) connected thereto is provided at its lower end. A clamp (7) is provided at the bottom of the head cover blind plate (1). An opening and closing mechanism (2) connected thereto is provided at the top of the cylinder flange (6). A rotating mechanism (5) is provided on the head cover blind plate (1).

2. The quick-opening blind flange for corrosion-resistant surfacing welding according to claim 1, characterized in that: The safety interlock mechanism (8) is composed of an interlock pressing plate, a safety bolt and a graphite sealing ring.

3. The quick-opening blind flange for corrosion-resistant surfacing welding according to claim 2, wherein: The safety bolt is made of nickel-chromium-molybdenum alloy material.

4. The quick-opening blind flange for corrosion-resistant surfacing welding according to claim 1, wherein: A cylinder welded to the lower end of the cylinder flange (6) is provided at the rear end of the head cover blind plate (1). A nickel-chromium-molybdenum alloy anti-corrosion layer is surfacing-welded on the contact surfaces of the cylinder with the head cover blind plate (1) and the cylinder flange (6).

5. The quick-opening blind flange for corrosion-resistant surfacing welding according to claim 1, characterized in that: Graphite sealing material is filled between the cylinder flange (6) and the head cover blind plate (1).

6. The quick-opening blind flange for corrosion-resistant surfacing welding according to claim 1, wherein: The opening and closing mechanism (2) is composed of a connecting plate, a lead screw, a bushing, a locking block, a positioning pin and bolts.

7. The quick-opening blind flange for corrosion-resistant surfacing welding according to claim 1, characterized in that: The rotating mechanism (5) includes a rotating plate, a rotating shaft, a bushing, an adjusting bolt, an adjusting block, a backing plate and a fixing nut, and the rotating plate is fixed to the head cover blind plate (1) by bolts.

8. The quick-opening blind flange for corrosion-resistant surfacing welding according to claim 1, wherein: Hinge mechanisms (4) are symmetrically provided on both sides at the lower end of the head cover blind plate (1). The hinge mechanisms are composed of hinges and hinge shafts.

9. The quick-opening blind flange for corrosion-resistant surfacing welding according to claim 1, characterized in that: A handle (3) is also provided on the head cover blind plate (1).

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