Quick disassembly and assembly blind plate for pipeline maintenance in narrow space

Abstract

The invention discloses a quick disassembly and assembly blind plate for pipeline maintenance in a narrow space, relates to the technical field of design of pipeline maintenance blind plates, and aims at solving the problems that an existing maintenance blind plate is connected through a plurality of bolts, operation is tedious during disassembly and assembly, and maintenance is inconvenient. The blind plate comprises a barrel flange and a lower clamp fixedly connected to the top of the barrel flange, an end socket and an upper clamp fixedly connected to the bottom of the end socket are installed at the top end of the barrel flange, the upper clamp and the lower clamp are matched and are in fastening connection through a safety locking component, and an inflatable rubber ring and a water swelling rubber ring are arranged between the barrel flange and the end socket. According to the blind plate capable of being quickly disassembled and assembled, through the structural design, the blind plate can be automatically centered during disassembly and can be disassembled or assembled only by vertically and upwards lifting or falling, the disassembly and assembly operation is convenient and quick, and the needed space is small; and the sealing performance of the blind plate is ensured through three sealing structures.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of pipeline maintenance blind plate design, and particularly relates to a quick dismounting blind plate for pipeline maintenance in a narrow space. BACKGROUND

[0002] The inlet of pipeline maintenance is a maintenance blind plate, which has double functions of maintenance and sealing. The blind plate is mainly composed of a head, a cylinder flange and a connecting piece, is usually located on a branch pipeline, and is welded with the cylinder flange on the pipeline. The head is connected to the cylinder flange by bolts, and the cylinder flange and the blind flange are sealed by O-rings.

[0003] The maintenance blind plate is connected by bolts, and the bolts need to be removed in sequence each time the blind plate is dismounted. After maintenance, the bolts need to be installed in sequence. During the process, the head needs to be lifted by lifting equipment, and a large space is required. The maintenance blind plate needs a large number of bolts to be dismounted and hoisting equipment to be matched each time the blind plate is dismounted, which is very inconvenient for maintenance operation, especially in emergency situations. SUMMARY

[0004] The application aims to provide a quick dismounting blind plate for pipeline maintenance in a narrow space, which solves the problem that the existing maintenance blind plate is connected by a plurality of bolts, and is inconvenient for maintenance operation due to complicated dismounting operation.

[0005] The application solves the technical problem by adopting the following technical scheme: a quick dismounting blind plate for pipeline maintenance in a narrow space, wherein the blind plate comprises a cylinder flange and a lower clamp fixedly connected to the top of the cylinder flange, a head and an upper clamp fixedly connected to the bottom of the head are installed at the top end of the cylinder flange, the upper clamp and the lower clamp are matched and fastened by a safety locking part, an inflatable rubber ring and a water-swelling rubber ring are arranged between the cylinder flange and the head.

[0006] The quick dismounting blind plate for pipeline maintenance in a narrow space, wherein the outer edge of the lower end surface of the head is provided with two grooves for placing the inflatable rubber ring and the water-swelling rubber ring.

[0007] The quick dismounting blind plate for pipeline maintenance in a narrow space, wherein the inflatable rubber ring is arranged in the groove of the outer circle of the lower end surface of the head, and the water-swelling rubber ring is arranged in the groove of the inner circle of the lower end surface of the head.

[0008] The quick dismounting blind plate for pipeline maintenance in a narrow space, wherein the cylinder flange and the lower clamp, and the head and the upper clamp are fixedly connected by non-continuous welding process.

[0009] The quick dismounting blind plate for pipeline maintenance in narrow space has the following beneficial effects: the quick dismounting blind plate for pipeline maintenance in narrow space can be vertically lifted or dropped to complete dismounting or installation, and the operation is convenient and fast, and the required space is small; the sealing performance of the blind plate is ensured by three sealing structures; and the blind plate is automatically concentric after installation without centering operation in the lifting process.

[0010] The quick dismounting blind plate for pipeline maintenance in narrow space has the following beneficial effects: the quick dismounting blind plate for pipeline maintenance in narrow space can be vertically lifted or dropped to complete dismounting or installation, and the operation is convenient and fast, and the required space is small; the sealing performance of the blind plate is ensured by three sealing structures; and the blind plate is automatically concentric after installation without centering operation in the lifting process.

[0011] The quick dismounting blind plate for pipeline maintenance in narrow space has the following beneficial effects: the quick dismounting blind plate for pipeline maintenance in narrow space can be vertically lifted or dropped to complete dismounting or installation, and the operation is convenient and fast, and the required space is small; the sealing performance of the blind plate is ensured by three sealing structures; and the blind plate is automatically concentric after installation without centering operation in the lifting process.

[0012] The quick dismounting blind plate for pipeline maintenance in narrow space has the following beneficial effects: the quick dismounting blind plate for pipeline maintenance in narrow space can be vertically lifted or dropped to complete dismounting or installation, and the operation is convenient and fast, and the required space is small; the sealing performance of the blind plate is ensured by three sealing structures; and the blind plate is automatically concentric after installation without centering operation in the lifting process.

[0013] The quick dismounting blind plate for pipeline maintenance in narrow space has the following beneficial effects: the quick dismounting blind plate for pipeline maintenance in narrow space can be vertically lifted or dropped to complete dismounting or installation, and the operation is convenient and fast, and the required space is small; the sealing performance of the blind plate is ensured by three sealing structures; and the blind plate is automatically concentric after installation without centering operation in the lifting process. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 Fig. 1 is a schematic diagram of the overall structure of the quick dismounting blind plate for pipeline maintenance in narrow space; Figure 2 Fig. 2 is an exploded schematic diagram of the overall structure of the quick dismounting blind plate for pipeline maintenance in narrow space; Figure 3 Fig. 3 is a schematic diagram of the cross-sectional structure of the quick dismounting blind plate for pipeline maintenance in narrow space; Figure 4 Fig. 4 is a schematic diagram of the cross-sectional structure of the quick dismounting blind plate for pipeline maintenance in narrow space.

[0015] Fig. 1 is a schematic diagram of the overall structure of the quick dismounting blind plate for pipeline maintenance in narrow space; DETAILED DESCRIPTION

[0016] To address the problem that existing blind flanges, which use multiple bolts for connection, are cumbersome to install and remove, making maintenance inconvenient, this invention provides a quick-installation blind flange for pipe maintenance in confined spaces. For example... Figures 1-4 As shown, the blind flange includes: a cylindrical flange 1 and a lower clamp 7 fixedly connected to the top of the cylindrical flange 1; an end cap 5 and an upper clamp 6 fixedly connected to the bottom of the end cap 5 are installed on the top of the cylindrical flange 1. The upper clamp 6 and the lower clamp 7 are matched and fastened together by a safety locking component 2, which includes: screws, nuts, and pins. An inflatable rubber ring 3 and a water-swellable rubber ring 4 are disposed between the cylindrical flange 1 and the end cap 5. The lower end face of the end cap 5 has two slots on its outer edge, used to accommodate the inflatable rubber ring 3 and the water-swellable rubber ring 4, respectively. The inflatable rubber ring 3 is disposed in the slot on the outer ring of the lower end face of the end cap 5, and the water-swellable rubber ring 4 is disposed in the slot on the inner ring of the lower end face of the end cap 5.

[0017] The cylindrical flange 1 and the lower clamp 7, and the end cap 5 and the upper clamp 6 are all fixedly connected by a discontinuous welding process. Both the upper clamp 6 and the lower clamp 7 have protruding connecting lugs at their mating connections, and the safety locking component 2 is fastened through the connecting holes on the connecting lugs. Eight holes are evenly distributed on the upper end face of the end cap 5 near the outer ring groove, and four holes are respectively formed on the upper clamp 6 and the lower clamp 7. The holes on the clamps correspond to the holes on the end cap 5, together forming the observation and glue injection hole 8 of the device. Lifting rings are also provided on the end cap 5 and the upper clamp 6 fixedly connected to the bottom of the end cap 5. The blind flange does not require alignment during lifting; it automatically becomes concentric after installation.

[0018] The quick-release blind flange installation process is as follows: First, the cylinder flange 1 and the lower clamp 7 are welded together discontinuously, and then the whole assembly is welded to the pipeline; then, the end cap 5 and the upper clamp 6 are welded together discontinuously, and then the inflatable rubber ring 3 and the water-swellable rubber ring 4 are installed into the corresponding slots; after the quick-release blind flange is lifted through the lifting hole, it is inserted into the cylinder flange 1 and the lower clamp 7, and then tightened using the safety locking component 2, and the inflatable rubber ring 3 is pressurized to complete the initial seal. The sealing principle of the device: The inflatable rubber ring 3 achieves the initial sealing pressure through pressurization, completing the auxiliary seal before the water-swellable rubber ring 4 is fully expanded; after the water-swellable rubber ring 4 comes into contact with water, it slowly expands to form the main seal, achieving automatic sealing during operation; if leakage still occurs, a third seal is achieved by injecting adhesive through the injection hole 8.

[0019] It should be noted that the combination of the technical features in the embodiments of the present invention is not limited to the combination methods described in the embodiments of the present invention or the combination methods described in the specific embodiments. All technical features described in the present invention can be freely combined or combined in any way, unless there is a contradiction between them.

[0020] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A quick-release blind flange for pipe maintenance in confined spaces, characterized in that, The blind flange includes: a cylindrical flange (1) and a lower clamp (7) fixedly connected to the top of the cylindrical flange (1), an end cap (5) and an upper clamp (6) fixedly connected to the bottom of the end cap (5) installed at the top of the cylindrical flange (1), the upper clamp (6) and the lower clamp (7) are matched and fastened together by a safety locking component (2), and an inflatable rubber ring (3) and a water-swellable rubber ring (4) are provided between the cylindrical flange (1) and the end cap (5).

2. A quick-release blind flange for pipe maintenance in confined spaces according to claim 1, characterized in that, The lower end face of the end cap (5) has two slots on its outer edge, which are used to place an inflatable rubber ring (3) and a water-swellable rubber ring (4), respectively.

3. A quick-release blind flange for pipe maintenance in confined spaces according to claim 2, characterized in that, The inflatable rubber ring (3) is placed in the groove of the outer ring of the lower end face of the end cap (5), and the water-swellable rubber ring (4) is placed in the groove of the inner ring of the lower end face of the end cap (5).

4. A quick-release blind flange for pipe maintenance in confined spaces according to claim 1, characterized in that, The cylindrical flange (1) and the lower clamp (7), and the end cap (5) and the upper clamp (6) are all fixedly connected by a discontinuous welding process.

5. A quick-release blind flange for pipe maintenance in confined spaces according to claim 1, characterized in that, The upper clamp (6) and the lower clamp (7) are both provided with protruding connecting ears at their matching connection points, and the safety locking component (2) is fastened through the connecting holes on the connecting ears.

6. A quick-release blind flange for pipe maintenance in confined spaces according to claim 1 or 5, characterized in that, The safety locking component (2) includes: screw, nut, and pin.

7. A quick-release blind flange for pipe maintenance in confined spaces according to claim 2, characterized in that, The upper end face of the end cap (5) is provided with eight holes evenly distributed near the outer ring groove. The upper clamp (6) and the lower clamp (7) are provided with four holes respectively. The holes on the clamps correspond to the holes on the end cap (5) and together form the observation and glue injection hole (8) of the device.

8. A quick-release blind flange for pipe maintenance in confined spaces according to claim 1, characterized in that, The end cap (5) and the upper clamp (6) fixedly connected to the bottom of the end cap (5) are provided with lifting rings.

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