Mechanical pipeline plugging device

Abstract

According to the mechanical pipeline plugging device, a bearing chamber is arranged in the center of a fixing disc, a lead screw penetrates through a bearing of the bearing chamber to be connected with a pressing disc, internal threads of an upper T-shaped sliding block are left-hand threads, internal threads of a lower T-shaped sliding block are right-hand threads, the fixing disc is connected with the T-shaped sliding block through a bolt, and the T-shaped sliding block is connected into a T-shaped groove A of an anchoring slip in a sliding mode. A T-shaped guide rail is arranged on the taper surface of the movable cone, the anchoring slip is in sliding connection with the T-shaped guide rail of the movable cone through a T-shaped groove B, a copper shearing nail is arranged between the movable cone and the pressing disc, a conical spacer ring is arranged between the two nitrile rubber cups, and extension springs are arranged in the nitrile rubber cups. The anchoring slip is tightly meshed with the inner wall of the pipeline through conical surface extrusion between the anchoring slip and the movable cone, the extension spring is arranged in the nitrile rubber cup, and when the nitrile rubber cup contracts, the nitrile rubber cup deformed through extrusion can be better restored to the original shape through the extension spring.

Description

Technical Field

[0001] The utility model relates to the technical field of pipeline maintenance tools, in particular to a mechanical pipeline blocking device. Background Art

[0002] During the use of oil and gas pipelines, due to internal or external factors, the pipelines may be partially corroded, deformed or damaged, resulting in pipeline safety hazards. When repairing or replacing the hazardous section, pipeline plugging operations are required. At present, the disc plugging heads used in pipeline plugging operations have a relatively complex structure and are not tightly plugged. Not only do they need to open equal-diameter holes on the pipeline, but the three-way pipe fittings, plugging knives and other equipment used in the construction are also expensive, and the knives are easily damaged during construction, which brings great trouble to the construction. Utility Model Content

[0003] The utility model provides a mechanical pipeline plugging device to solve the problems of inconvenient use and loose plugging in the prior art.

[0004] The technical solution adopted by the utility model to solve its technical problems is:

[0005] A mechanical pipeline plugging device comprises a fixed plate, two upper and lower T-shaped sliders, an anchoring slip, a movable cone, two nitrile rubber leather cups, a clamping plate and a lead screw. A bearing chamber is arranged at the center of the fixed plate. The lead screw passes through the bearing in the bearing chamber and is connected to the clamping plate. The internal thread of the upper T-shaped slider is a reverse thread, and the internal thread of the lower T-shaped slider is a normal thread. The fixed plate is connected to the T-shaped slider by bolts. The T-shaped slider is slidably connected in the T-shaped groove A of the anchoring slip. A T-shaped guide rail is arranged on the tapered surface of the movable cone. The anchoring slip is slidably connected to the T-shaped guide rail of the movable cone through the T-shaped groove B. A copper shear nail is arranged between the movable cone and the clamping plate. A conical spacer ring is arranged between the two nitrile rubber leather cups. A tension spring is arranged inside the nitrile rubber leather cup.

[0006] A limit block is arranged at the front end of the movable cone, and the limit block is fixed on the pressing plate.

[0007] The outer surface of the anchoring slip has a serrated structure.

[0008] A bearing pressure cover is arranged outside the bearing chamber.

[0009] The thread direction of the above-mentioned screw is right-hand.

[0010] The utility model device connects the fixed plate through the plugging device, and sends the mechanical pipeline plugging device into the pipeline. By rotating the screw clockwise, the compression plate moves axially in the direction of the anchoring slip. Since the movable cone and the compression plate are connected together by copper shear nails, the movable cone moves axially in the direction of the anchoring slip at the same time. The cone surface between the anchoring slip and the movable cone is squeezed to make the anchoring slip move radially and generate a small axial force, so that the anchoring slip is tightly engaged on the inner wall of the pipeline to achieve the anchoring of the plugging device. Then the screw continues to rotate clockwise, and the compression plate continues to move in the direction of the anchoring slip, thereby cutting off the copper shear nails between the movable cone and the compression plate. The two nitrile rubber cups expand radially under the squeeze of the movable cone and the compression plate, and the medium flow direction in the pipeline is sealed. A tension spring is arranged inside the nitrile rubber skin. When the nitrile rubber cup shrinks, the tension spring can better restore the extruded and deformed nitrile rubber cup to its original shape.

[0011] The utility model makes the anchoring slip tightly bite the inner wall of the pipe by squeezing the conical surface between the anchoring slip and the movable cone. The nitrile rubber leather cup has a built-in tension spring. When the nitrile rubber leather cup contracts, the tension spring can better restore the squeezed and deformed nitrile rubber leather cup to its original shape. The utility model has the advantages of simple structure, safety, reliability and reliable sealing. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0013] Figure 1 It is a cross-sectional structural schematic diagram of the utility model;

[0014] Figure 2 It is a structural diagram of the anchoring slip of the utility model.

[0015] In the figure, 1 is a fixed plate, 2 is a T-shaped slider, 3 is an anchoring slip, 4 is a limit block, 5 is a movable cone, 6 is a copper shear nail, 7 is a nitrile rubber cup, 8 is a conical spacer ring, 9 is a nitrile rubber cup, 10 is a clamping plate, 11 is a tension spring, 12 is a lead screw, 13 is a bearing, 14 is a bearing cover, 15 is a T-slot A, and 16 is a T-slot B. DETAILED DESCRIPTION

[0016] like Figure 1 and Figure 2As shown, a mechanical pipeline plugging device includes a fixed plate 1, two upper and lower T-shaped sliders 2, an anchoring slip 3, a movable cone 5, a nitrile rubber cup 7, a nitrile rubber cup 9, a clamping plate 10 and a lead screw 12. A bearing chamber is arranged at the center of the fixed plate 1. The lead screw 12 passes through a bearing 13 in the bearing chamber and is connected to the clamping plate 10. The thread of the lead screw 12 is right-handed. The internal thread of the upper T-shaped slider 2 is a reverse thread, and the internal thread of the lower T-shaped slider 2 is a normal thread. The fixed plate 1 is connected to the T-shaped slider 2 by bolts. The T-shaped slider 2 is slidably connected to the T-slot A15 of the anchoring slip 3. In the embodiment, a T-shaped guide rail is arranged on the conical surface of the movable cone, and the anchoring cava 3 is slidably connected with the T-shaped guide rail of the movable cone 5 through a T-shaped groove B16. A limit block 4 is arranged at the front end of the movable cone 5, and the limit block 4 is fixed on the clamping plate 10. A copper shear nail 6 is arranged between the movable cone and the clamping plate, and a conical spacer ring 8 is arranged between the nitrile rubber cup 7 and the nitrile rubber cup 9. A tension spring 11 is arranged inside the nitrile rubber cup. The outer surface of the anchoring cava has a serrated structure. A bearing pressure cover 14 is arranged outside the bearing chamber.

[0017] The utility model connects the fixed plate 1 through the plugger to send the mechanical pipeline plugging device into the pipeline, and by rotating the screw 12 clockwise, the clamping plate 10 performs axial movement toward the anchoring slip 3. Since the movable cone 5 and the clamping plate 10 are connected together by the copper shear nail 6, the movable cone 5 performs axial movement toward the anchoring slip 3 at the same time, and the anchoring slip 3 is radially moved by the conical surface extrusion between the anchoring slip 3 and the movable cone 5, and a small axial force is generated, so that the anchoring slip 3 is tightly engaged with the inner wall of the pipeline to realize the anchoring of the plugging device, and then the screw 12 continues to be rotated clockwise, and continues to move toward the anchoring slip through the clamping plate 10, thereby cutting off the copper shear nail 6 between the movable cone 5 and the clamping plate 10, and the nitrile rubber leather cup 7 and the nitrile rubber leather cup 9 radially expand under the extrusion of the movable cone 5 and the clamping plate 10, so as to seal the flow direction of the medium in the pipeline.

Claims

1. Mechanical pipeline plugging device, characterized by It includes a fixed plate, two upper and lower T-shaped sliders, an anchoring slip, a movable cone, two nitrile rubber cups, a clamping plate and a lead screw. A bearing chamber is arranged at the center of the fixed plate. The lead screw passes through the bearing in the bearing chamber and is connected with the clamping plate. The internal thread of the upper T-shaped slider is a reverse thread, and the internal thread of the lower T-shaped slider is a normal thread. The fixed plate is connected to the T-shaped slider by bolts. The T-shaped slider is slidably connected in the T-slot A of the anchoring slip. A T-shaped guide rail is arranged on the tapered surface of the movable cone. The anchoring slip is slidably connected to the T-shaped guide rail of the movable cone through the T-slot B. A copper shear nail is arranged between the movable cone and the clamping plate. A conical spacer ring is arranged between the two nitrile rubber cups, and a tension spring is arranged inside the nitrile rubber cup.

2. The mechanical pipeline plugging device according to claim 1 is characterized in that A limit block is arranged at the front end of the movable cone, and the limit block is fixed on the pressing plate.

3. The mechanical pipeline plugging device according to claim 1 is characterized in that The outer surface of the anchoring slip has a serrated structure.

4. The mechanical pipeline plugging device according to claim 1 is characterized in that A bearing cover is arranged outside the bearing chamber.

5. The mechanical pipeline plugging device according to claim 1 is characterized in that The thread direction of the lead screw is right-hand.

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