A sealing connecting box matched with an inner-expanding occlusion device

Abstract

The utility model relates to pipeline pressure tapping plugging technical field especially relates to a plugging continuous box matched with the inner expansion plugging device, and the plugging continuous box includes the box body of tubulose, is equipped with upper flange on the upper end of box body, is equipped with lower flange on the lower end of box body, is equipped with bypass pipe on one side of box body, is equipped with bypass flange on the end of bypass pipe, is connected with upper flange cover on upper flange, is equipped with through -hole in the center of upper flange cover, still is equipped with hydraulic steel pipe expansion joint hole on upper flange cover, is equipped with sealing element in hydraulic steel pipe expansion joint hole, upper flange cover is connected with the inner expansion plugging device through bolt fastening. The utility model adopts bypass design, connects upstream and downstream medium, can realize plugging operation without stopping, reduces pipeline tapping, reduces the risk of leakage, adopts upper flange cover design, is convenient for dismantling the plugging head, the inner expansion plugging device, improves construction efficiency in construction.

Description

Technical Field

[0001] This utility model relates to the field of pipeline pressurized opening and sealing technology, and in particular to a sealing box used in conjunction with an internal expansion sealing device. Background Technology

[0002] In pipeline tapping or maintenance work, pressurized operations are often required, which necessitates sealing pressurized pipelines. During these operations, sealing devices are commonly used to apply various manipulations to pipe fittings. To achieve reliable and safe pipeline sealing, existing sealing boxes that match internal expansion sealing devices cannot achieve high-pressure sealing without interrupting pipeline flow. This requires opening an additional bypass hole in the pipeline, increasing the risk of leakage. Furthermore, the installation, disassembly, and use of the sealing boxes are inconvenient. To facilitate the use of internal expansion sealing devices and pressurized pipeline sealing operations without interrupting flow, it is necessary to develop a new type of sealing box that can be used in conjunction with internal expansion sealing devices. Summary of the Invention

[0003] The purpose of this utility model is to provide a sealing box that is used in conjunction with an internal expansion plug, thereby reducing the need to open an extra bypass hole in the pipeline during the existing high-pressure sealing process without interrupting pipeline transmission, improving construction efficiency, reducing pipeline leakage points, and facilitating the disassembly of the plug head and plug. It is applicable to internal expansion plugs.

[0004] Specifically, it is a sealing box used in conjunction with an internal expansion plug. The sealing box includes a tubular box body with an upper flange at the upper end and a lower flange at the lower end. A bypass pipe is provided on one side of the box body, and a bypass flange is provided at the end of the bypass pipe. An upper flange cover is bolted to the upper flange. A through hole is opened in the center of the upper flange cover. A hydraulic steel pipe expansion hole is also opened on the upper flange cover, and a sealing element is provided in the hydraulic steel pipe expansion hole. The upper flange cover and the internal expansion plug are fastened together by bolts.

[0005] Preferably, a first sealing ring is provided between the upper flange cover and the upper flange.

[0006] Preferably, the upper flange cover has a plurality of threaded holes evenly spaced in a ring, and the threaded holes are connected to a third bolt.

[0007] Preferably, the upper flange cover is equipped with a lifting ring.

[0008] Preferably, an inner edge step is provided on the outer side of the upper end of the through hole, and a second sealing ring is provided on the inner edge step.

[0009] Preferably, the sealing element includes a copper sleeve embedded in the expansion hole of the hydraulic steel pipe, with at least one third sealing ring between the copper sleeve and the expansion hole of the hydraulic steel pipe, and at least one fourth sealing ring inside the copper sleeve.

[0010] Preferably, there are two of each of the third and fourth sealing rings.

[0011] Preferably, the bypass flange is provided with a bypass flange cover seal and is locked with bolts.

[0012] Preferably, a pressure balancing port is provided on the other side of the housing, and a pressure balancing valve is installed for pressure balancing.

[0013] Preferably, a vent is provided on the other side of the box, and a vent valve is installed on the vent. Beneficial effects

[0014] The plugging box of this utility model adopts a bypass design to connect upstream and downstream media, which can realize plugging operation without interrupting the supply, reduce pipeline openings, and reduce leakage risk; The sealing box of this utility model adopts an upper flange cover design, which facilitates the disassembly of the sealing head and the internal expansion sealing device, and improves construction efficiency during construction; it can be connected with the internal expansion sealing device, and the upper flange cover can achieve safe and effective sealing through hydraulic steel pipes.

[0015] This utility model features a sealing box that is dustproof, waterproof, pressure-resistant, has good sealing performance, high safety, and low risk of leakage. Attached Figure Description

[0016] Figure 1 This is a perspective view of an embodiment of the present utility model; Figure 2 This is a partial cross-sectional view of the structure of an embodiment of the present utility model; Figure 3 This utility model Figure 2 Enlarged schematic diagram of structure A in the middle; Figure 4 A schematic diagram of the internal expansion plug that is compatible with this utility model; Figure 5 This is a cross-sectional view of the present invention in use; Box body-1, upper flange-101, lower flange-102, bypass pipe-103, bypass flange-1031, bypass flange cover-1032, second bolt-1033, upper flange cover-104, first bolt-1041, through hole-1042, second sealing ring-10421, hydraulic steel pipe expansion hole-1043, threaded hole-1044, third bolt-10441, first sealing ring-1045, copper Set-1046, Third sealing ring-1047, Fourth sealing ring-1048, Lifting ring-1049, Pressure balancing port-105, Pressure balancing valve-1051, Vent port-106, Vent valve-1061, Housing-2, Locking device-201, Piston rod-202, Reversing valve-203, Hydraulic steel pipe-204, Sealing head-205, Clamp valve-3, T-fitting pipe-4, Pressurized pipeline-5. Detailed Implementation

[0017] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.

[0018] Furthermore, it should be understood in this utility model that the directions or positional relationships indicated by "up", "down", "front", "back", "left", "right", "top", "bottom", "inner", and "outer" are based on the directions or positional relationships shown in the accompanying drawings and are only for the convenience of describing this utility model, and are not intended to indicate or imply that the device or element referred to must have this specific orientation or operate in a specific orientation. Therefore, they should not be construed as limitations of this utility model. Example

[0019] As attached Figures 1-5 As shown, a sealing box for use with an internal expansion plugger includes a tubular box body 1, with an upper flange 101 at the upper end and a lower flange 102 at the lower end; a bypass pipe 103 is provided on one side of the box body 1, and a bypass flange 1031 is provided at the end of the bypass pipe 103; the upper flange 101, lower flange 102, bypass pipe 103, and bypass flange 1031 are integrally cast or welded with the box body 1. The upper flange 101 is bolted to the upper flange cover 104. The upper flange cover 104 has a through hole 1042 in the center and a hydraulic steel pipe expansion hole 1043 on the upper flange cover 104. A sealing element is installed in the hydraulic steel pipe expansion hole 1043. The upper flange cover 104 is fastened to the internal expansion plug by bolts.

[0020] In this embodiment, there are two hydraulic steel pipes 204, so there are two hydraulic steel pipe expansion holes 1043.

[0021] Furthermore, a first sealing ring 1045 is provided between the upper flange cover 104 and the upper flange 101 to provide a sealing function.

[0022] Furthermore, the upper flange cover 104 is provided with a number of threaded holes 1044 evenly arranged in a ring. The threaded holes 1044 are connected to a third bolt 10441, which is used to fasten the plug and locking device 201 to the upper flange cover 104.

[0023] Furthermore, the upper flange cover 104 is provided with a lifting ring 1049. The lifting ring 1049 can be threaded, snapped, or welded to the upper flange cover 104. In this embodiment, a threaded connection is preferred. Two lifting rings 1049 are symmetrically arranged. They can be connected by a screw hole on the upper flange cover 104 alone, or they can be connected using the threaded hole 1044. The lifting ring 1049 facilitates the handling and hoisting of the sealing box.

[0024] Furthermore, an inner edge step is provided on the outer side of the upper end of the through hole 1042, and a second sealing ring 10421 is provided on the inner edge step to seal between the locking device 201 and the upper flange cover 104.

[0025] Furthermore, the sealing element includes a copper sleeve 1046 embedded in the hydraulic steel pipe expansion hole 1043, with two third sealing rings 1047 between the copper sleeve 1046 and the hydraulic steel pipe expansion hole 1043 to achieve sealing between the copper sleeve 1046 and the hydraulic steel pipe expansion hole 1043, and two fourth sealing rings 1048 inside the copper sleeve 1046 to achieve sealing between the copper sleeve 1046 and the hydraulic steel pipe 204.

[0026] Furthermore, the bypass flange 1031 is provided with a bypass flange cover 1032 for sealing, and is locked by a second bolt 1033. It serves as a seal when the bypass pipe is not in use. When in use, the bypass flange cover 1032 can be removed and a temporary bypass pipe can be connected.

[0027] Furthermore, a balance port 105 is provided on the other side of the housing 1, and a pressure balancing valve 1051 is installed in the balance port 105 to balance the pressure of the gas and the medium inside the housing.

[0028] Furthermore, a vent 106 is provided on the other side of the housing 1, and a vent valve 1061 is installed on the vent 106 to release the gas in the pipeline.

[0029] like Figure 4 As shown, the internal expansion plug includes a housing 2, a locking device 201 fixed to the lower end of the housing 2, a piston rod 202 sliding inside the housing, a reversing valve 203 fixed to the side of the housing 2, a hydraulic steel pipe 204 sliding on the housing 2 and the locking device 201, and a plug head 205 connected to the end of the piston rod 202. The two ends of the reversing valve 203 are connected to the upper and lower ends of the housing 2 respectively through pipes, and the piston rod 202 is controlled to slide up and down by controlling the hydraulic oil. Multiple bolts are provided on the side of the locking device 201. By tightening the bolts, the piston rod 202 can be locked or released. The hydraulic steel pipe 204 is connected to the plug head 205 to control its expansion and contraction and locking.

[0030] like Figure 5The tee fitting 4 is fixed to the pressurized pipeline 5, and the clamp valve 3 is fixed to the tee fitting 4 by flange bolts. The lower flange 102 of the sealing box is fixed to the clamp valve 3 by bolts. At this time, the pipeline inside the tee fitting 4 has been opened, and the clamp valve 3 is closed.

[0031] In use, the internal expansion plug is locked to the upper flange cover 104 with the third bolt 10441. The piston rod 202 can freely extend and retract through the through hole 1042. The hydraulic steel pipe 204 can freely extend and retract through the hydraulic steel pipe extension hole 1043. Then, the plug head 205 is fixed to the piston rod 202, and the hydraulic steel pipe is connected to the plug head 205. Finally, the upper flange cover 104 and the upper flange 101 are locked with the first bolt 1041. Remove the bypass flange cover 1032 and connect the temporary bypass pipe to the bypass flange 1031; the same operation is performed at the opening at the other end of the pipe. First, balance the pressure of the box and the pipe through the external medium at the balance port, and then open the clamp valves 3 at both places to connect the upstream and downstream media through the bypass pipe on the sealing box; this can realize the diversion, control the internal expansion plug to move downward, and the operation realizes the sealing.

[0032] It should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solution of the utility model without departing from the scope of the technical solution of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A sealing box for use with an internal expansion sealing device, characterized in that: The sealing box includes a tubular box (1), with an upper flange (101) at the upper end and a lower flange (102) at the lower end; a bypass pipe (103) is provided on one side of the box (1), and a bypass flange (1031) is provided at the end of the bypass pipe (103); an upper flange cover (104) is bolted to the upper flange (101), and a through hole (1042) is opened in the center of the upper flange cover (104). A hydraulic steel pipe expansion hole (1043) is also opened on the upper flange cover (104), and a sealing element is provided in the hydraulic steel pipe expansion hole (1043); the upper flange cover (104) and the internal expansion sealing device are fastened together by bolts.

2. The sealing box used in conjunction with the internal expansion sealing device according to claim 1, characterized in that: A first sealing ring (1045) is provided between the upper flange cover (104) and the upper flange (101).

3. The sealing box used in conjunction with the internal expansion sealing device according to claim 1, characterized in that: The upper flange cover (104) has a plurality of threaded holes (1044) evenly arranged in a ring, and the threaded holes (1044) are connected to a third bolt (10441).

4. The sealing box used in conjunction with the internal expansion sealing device according to claim 1, characterized in that: The upper flange cover (104) is provided with a lifting ring (1049).

5. The sealing box for use with the internal expansion sealing device according to claim 1, characterized in that: The upper outer side of the through hole (1042) is provided with an inner edge step, and a second sealing ring (10421) is provided on the inner edge step.

6. The sealing box for use with the internal expansion sealing device according to claim 1, characterized in that: The sealing element includes a copper sleeve (1046) embedded in the expansion hole (1043) of the hydraulic steel pipe, and at least one third sealing ring (1047) is provided between the copper sleeve (1046) and the expansion hole (1043) of the hydraulic steel pipe, and at least one fourth sealing ring (1048) is provided inside the copper sleeve (1046).

7. The sealing box for use with the internal expansion sealing device according to claim 1, characterized in that: The third sealing ring (1047) and the fourth sealing ring (1048) are each provided in twos.

8. The sealing box for use with the internal expansion sealing device according to claim 1, characterized in that: The bypass flange (1031) is provided with a bypass flange cover (1032) for sealing and is locked with bolts.

9. The sealing box for use with the internal expansion sealing device according to claim 1, characterized in that: The other side of the housing (1) is provided with a pressure relief port (105), and a pressure relief valve (1051) is installed on the pressure relief port (105).

10. The sealing box for use with the internal expansion sealing device according to claim 1, characterized in that: The other side of the housing (1) is provided with a heat dissipation vent (106), and the heat dissipation vent (106) is equipped with a heat dissipation plug (1061).

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