Flange full-wrapping type welding plugging tee joint

Abstract

The utility model discloses a flange full-wrapping type welding plugging tee joint, which belongs to the technical field of pipeline maintenance and first-aid repair, and comprises a tee joint shell, the bottom of the tee joint shell and the upper part of a lower protective plate are aligned and welded on a pipeline to be maintained, a barrier strip is arranged at the joint of the tee joint shell and the inner wall of the lower protective plate, a flange cover is arranged at the top of the tee joint shell, and the flange cover is connected with the tee joint shell. Bolts are connected to the top of the three-way shell and the upper surface of the flange cover in a penetrating mode through assembly holes. According to the full-wrapping type welding plugging tee joint, the reducing half pipe and the sealing head are welded to the tee joint shell, so that the flange cover connecting position and the locking ring position of the plugging tee joint are contained in the welding shell to form a closed space, and the tee joint is free of leakage points after construction; the problem of sealing failure of the rubber ring and the metal wound gasket caused by time and other unpredictable reasons due to long-time deep burying is avoided, and a permanent sealing structure is formed.

Description

Technical Field

[0001] The utility model relates to the technical field of pipeline maintenance and repair, in particular to a flange all-inclusive welding plugging tee. Background Art

[0002] As pipelines age, there is an increasing demand for continuous flow pressure plugging due to settlement, corrosion or other reasons. The continuous flow pressure plugging technology is a special technology for the maintenance and emergency repair of in-service pipelines. The plugging tee, as a basic equipment of the continuous flow hole plugging technology, plays a vital role in the overall construction.

[0003] Existing sealing tees are usually composed of components such as a tee shell, a lower guard plate and a flange cover. The tee shell and the lower guard plate are welded to the position where the pipeline needs to be sealed, and then the flange cover is fixedly connected to the top of the tee shell to complete the sealing. However, this method has poor sealing performance and cannot form a permanent sealing structure for the pipeline. Utility Model Content

[0004] The purpose of the utility model is to provide a flange full-enclosed welded plugging tee to solve the problem of the limitation of the application scope of the current flange full-enclosed welded plugging tee mentioned in the background technology.

[0005] In order to achieve the above-mentioned purpose of the utility model, the utility model adopts the following technical solutions:

[0006] The utility model provides a flange all-inclusive welding plugging tee, comprising a tee shell, the bottom of the tee shell is aligned with the upper part of the lower guard plate and welded to the pipeline to be repaired, a retaining bar is provided at the connection between the tee shell and the inner wall of the lower guard plate, a flange cover is provided on the top of the tee shell, the top of the tee shell and the upper surface of the flange cover are connected with bolts through assembly holes, and the outer peripheral surface of the bolt close to the upper surface of the flange cover is threadedly connected with a nut.

[0007] The upper inner wall of the tee shell is provided with a protruding annular step, and a plug is placed on the protruding annular step on the inner wall of the tee shell. The bottom of the plug is fixedly connected to a saddle-shaped plate frame. The outer peripheral surface of the upper part of the tee shell is installed with a clamping ring assembly through an assembly hole. The clamping ring assembly can lock the plug by tightening the screws to prevent its axial movement. The top of the plug and the bottom of the flange cover are fixedly installed with anti-rotation sleeves, and the two groups of anti-rotation sleeves act on each other to prevent the plug from rotating in the circumferential direction. The outer peripheral surface of the middle part of the tee shell is fixedly installed with a reducing half-tube by welding, and the top of the reducing half-tube is fixedly installed with a head by welding.

[0008] Preferably, a rubber sealing ring is provided at the connection between the three-way housing and the plug, and a rubber sealing ring is provided at the connection between the three-way housing and the flange cover.

[0009] Preferably, the three-way shell, the reducing half pipe and the head are welded to form a completely sealed structure, which can form a permanent sealing structure for the connection between the three-way shell and the flange cover.

[0010] Preferably, two groups of the diameter-reducing half-tubes are provided, and the two groups of the diameter-reducing half-tubes are axially symmetrically arranged with respect to the outer circumferential surface of the upper portion of the tee shell.

[0011] Compared with the existing technology, one or more of the above technical solutions have the following beneficial effects:

[0012] 1. This flange-covered welded plugging tee can form a closed space by welding a reducing half pipe and a head on the tee shell to include the sealing tee flange cover connection and the lock ring in the welded shell. This ensures that the tee has no leakage points after construction, avoids the sealing failure of rubber rings and metal spiral wound gaskets caused by long-term deep burial due to time and other unpredictable reasons, and forms a permanent sealing structure.

[0013] 2. The welding part of the flange all-inclusive welding plugging tee (welding the reducing half pipe and the head) is easy to construct, and the overall equipment surface is smooth and has special protrusions after welding, which is easy to add anti-corrosion layer later;

[0014] 3. This flange fully enclosed welded sealing tee adopts a special structure at the tee shell welding reducer half pipe. This structure can inject water to cool down during welding to prevent heat from being transferred to the inside of the tee and causing the internal rubber ring to deform due to heat. At the same time, the retained water can be extracted cleanly after welding, which will not affect the corrosion protection. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The drawings in the specification, which constitute a part of the present invention, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention.

[0016] Figure 1 This is a schematic diagram of the three-dimensional structure of the utility model;

[0017] Figure 2 This is a side view of the structure of the utility model;

[0018] Figure 3 This is a front structural diagram of the utility model;

[0019] Figure 4 This is a front cross-sectional structural diagram of the utility model;

[0020] In the figure: 1. Tee shell; 2. Lower guard plate; 3. Baffle; 4. Plug; 5. Saddle plate frame; 6. Snap ring assembly; 7. Flange cover; 8. Anti-rotation sleeve; 9. Bolt; 10. Nut; 11. Reducer half pipe; 12. Head. DETAILED DESCRIPTION

[0021] In order to enable those skilled in the art to better understand the present invention, the following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts should fall within the scope of protection of this application.

[0022] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects and are not necessarily used to describe a specific order or sequential order. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the present application described here. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions. For example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0023] In this application, terms such as "upper," "lower," "left," "right," "front," "back," "top," "bottom," "inner," "outer," "center," "vertical," "horizontal," "transverse," and "longitudinal" indicate positions or locations based on the positions or locations shown in the accompanying drawings. These terms are primarily intended to better describe this application and its embodiments and are not intended to limit the devices, elements, or components indicated to having a specific orientation, or to being constructed or operated in a specific orientation.

[0024] Furthermore, some of the above terms may be used to express other meanings besides indicating a position or location. For example, the term "on" may also be used to indicate a dependency or connection in certain circumstances. Those skilled in the art will understand the specific meanings of these terms in this application based on the specific circumstances.

[0025] Furthermore, the terms "installed," "disposed," "provided with," "connected," "connected," and "socketed" should be interpreted broadly. For example, they can refer to fixed connections, removable connections, or integral structures; mechanical connections or electrical connections; direct connections, indirect connections through an intermediary, or internal communication between two devices, elements, or components. Those skilled in the art will understand the specific meanings of these terms in this application based on the specific circumstances.

[0026] See also Figure 1-Figure 4 The utility model provides an embodiment: a flange all-inclusive welding sealing tee, comprising a tee shell 1, the bottom of the tee shell 1 is aligned with the upper part of the lower guard plate 2 and welded to the pipeline to be repaired, a baffle 3 is provided at the connection between the inner wall of the tee shell 1 and the lower guard plate 2, and the internal gasket baffle 3 is used to prevent the pipeline from being affected by heat during welding of the tee shell 1 and the lower guard plate 2, a flange cover 7 is provided on the top of the tee shell 1, a rubber sealing ring is provided at the connection between the tee shell 1 and the flange cover 7, a bolt 9 is penetrated and connected to the upper surface of the flange cover 7 through an assembly hole, and a nut 10 is threadedly connected to the outer circumference of the bolt 9 near the upper surface of the flange cover 7.

[0027] A protruding annular step is provided on the upper inner wall of the tee shell 1, and a plug 4 is placed on the protruding annular step on the inner wall of the tee shell 1. A rubber sealing ring is provided at the connection between the tee shell 1 and the plug 4. The bottom of the plug 4 is fixedly connected to a saddle-shaped plate frame 5. A clamping ring assembly 6 is installed on the outer peripheral surface of the upper part of the tee shell 1 through an assembly hole. The clamping ring assembly 6 can lock the plug 4 by tightening the screws to prevent its axial movement. The top of the plug 4 and the bottom of the flange cover 7 are fixedly installed with an anti-rotation sleeve 8, and the two sets of anti-rotation sleeves 8 interact with each other to play a role in the rotation of the tee shell 1. In order to prevent the circumferential rotation from being blocked, a reducing half-tube 11 is fixedly installed on the outer circumferential surface of the middle part of the tee shell 1 by welding. There are two groups of reducing half-tubes 11, and the two groups of reducing half-tubes 11 are axially symmetrically arranged about the outer circumferential surface of the upper part of the tee shell 1. A head 12 is fixedly installed on the top of the reducing half-tube 11 by welding. The tee shell 1, the reducing half-tube 11 and the head 12 form a completely sealed structure by welding, which can form a permanent sealing structure for the connection between the tee shell 1 and the flange cover 7.

[0028] Working principle: When using the flange all-inclusive welding plugging tee, first put the tee shell 1 and the lower guard plate 2 on the outer surface of the pipe to be blocked. When the tee shell 1 and the lower guard plate 2 are connected, the lower edge of the tee shell 1 and the upper edge of the lower guard plate 2 should be neatly connected, and the outer connection between the tee shell 1 and the lower guard plate 2 should be lined with a retaining strip 3. After the tee shell 1 and the lower guard plate 2 are connected, they can be welded to the pipe. After the tee shell 1 and the lower guard plate 2 are welded, the saddle plate frame 5 is connected by bolts. Fix it at the bottom of the plug 4, and place the plug 4 and the saddle-shaped plate frame 5 on the protruding annular step inside the tee shell 1 through the opening at the top of the tee shell 1. After the plug 4 and the saddle-shaped plate frame 5 are placed, the clamping ring assembly 6 is fastened and locked to the outer surface of the plug 4 by bolts to prevent the plug 4 from axial movement. After the plug 4 is axially locked, two sets of anti-rotation sleeves 8 are respectively fixed to the top of the plug 4 and the bottom of the flange cover 7. After the anti-rotation sleeves 8 are fixed, the flange cover 7 is placed on the top of the tee shell 1. When placing the flange cover 7, it is necessary to align several groups of assembly holes. After the flange cover 7 is placed, the bolts 9 are passed through the assembly holes, and then the flange cover 7 and the tee shell 1 are fastened and sealed with the nuts 10. After the flange cover 7 is fastened, the two groups of anti-rotation sleeves 8 can interact with each other to prevent the plug 4 from rotating in the circumferential direction, thereby making the plug 4 perform the initial sealing of the tee shell 1, and the fastening of the flange cover 7 and the tee shell 1 is for secondary sealing. Finally, the two groups of reducing half pipes 11 are welded to the tee shell 1. After the reducing half pipe 11 and the tee shell 1 are welded, the head 12 is welded to the top of the reducing half pipe 11. Water is injected into the reducing half pipe 11, the head 12 and the tee shell 1 during welding to prevent heat from being transferred to the inside of the tee and causing the internal rubber ring to deform due to heat. At the same time, the stored water can be extracted cleanly after welding, which does not affect the corrosion protection. After the reducing half pipe 11, the head 12 and the tee shell 1 are welded, the blocked tee can be sealed three times, thereby forming a permanent sealing structure.

[0029] The above are only preferred specific implementation methods of the present invention, but the protection scope of the present invention is not limited to them. Any technician familiar with the technical field can make equivalent replacements or changes based on the technical solution and utility model concept of the present invention within the technical scope disclosed by the present invention, and they should be covered by the protection scope of the present invention.

Claims

1. A flange all-inclusive welding plugging tee, comprising a tee shell (1), the bottom of the tee shell (1) is aligned with the upper part of the lower guard plate (2) and welded to the pipeline to be repaired, a retaining bar (3) is provided at the connection between the inner wall of the tee shell (1) and the lower guard plate (2), a flange cover (7) is provided on the top of the tee shell (1), a bolt (9) is connected to the top of the tee shell (1) and the upper surface of the flange cover (7) through an assembly hole, and a nut (10) is threadedly connected to the outer peripheral surface of the bolt (9) near the upper surface of the flange cover (7), characterized in that The upper inner wall of the three-way shell (1) is provided with a protruding annular step, and a plug (4) is placed on the protruding annular step of the inner wall of the three-way shell (1). The bottom of the plug (4) is fixedly connected to a saddle-shaped plate frame (5). The outer peripheral surface of the upper part of the three-way shell (1) is installed with a clamping ring assembly (6) through an assembly hole. The clamping ring assembly (6) can lock the plug (4) by tightening a screw to prevent its axial movement. The top of the plug (4) and the bottom of the flange cover (7) are both fixedly installed with an anti-rotation sleeve (8). The two groups of anti-rotation sleeves (8) act on each other to prevent the plug (4) from rotating in the circumferential direction. The outer peripheral surface of the middle part of the three-way shell (1) is fixedly installed with a reducing half pipe (11) by welding, and the top of the reducing half pipe (11) is fixedly installed with a head (12) by welding.

2. The flange all-inclusive welding plugging tee according to claim 1 is characterized in that: A rubber sealing ring is provided at the connection between the three-way housing (1) and the plug (4), and a rubber sealing ring is provided at the connection between the three-way housing (1) and the flange cover (7).

3. The flange all-inclusive welding plugging tee according to claim 1 is characterized in that: The three-way shell (1), the reducing half pipe (11) and the sealing head (12) are welded to form a completely sealed structure, which can form a permanent sealing structure at the connection between the three-way shell (1) and the flange cover (7).

4. The flange all-inclusive welding plugging tee according to claim 1 is characterized in that: Two groups of the diameter-reducing half-tubes (11) are provided, and the two groups of the diameter-reducing half-tubes (11) are axially symmetrically arranged with respect to the outer peripheral surface of the upper portion of the three-way housing (1).

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