Self-expanding pipeline energy isolation device

Abstract

The utility model relates to a self-expansion type pipeline energy isolation device which comprises a main shaft rod, a fixed block, at least two expansion sealing sleeves and a movable block are sequentially arranged on the main shaft rod in a sleeved mode, a separation gasket is arranged between every two adjacent expansion sealing sleeves, and the fixed block and the movable block move oppositely along the main shaft rod to extrude the expansion sealing sleeves. At least two sealing isolation rings are formed after the expansion sealing sleeve is pressed, the multiple sealing isolation rings can strengthen the plugging effect of pipelines with the same diameter, in complex pipelines such as variable-diameter pipelines, special-shaped pipelines or pressure vessel connecting pipes, the multiple sealing isolation rings can automatically adapt to changes of the inner pipe diameters of the pipelines, multiple sealing isolation rings with different diameters are formed, and the sealing effect of the pipelines with the same diameter is improved. Stable and reliable sealing isolation is ensured, operation safety is effectively guaranteed, the application range is wide, and practicability is high.

Description

TECHNICAL FIELD

[0001] The utility model relates to pipeline maintenance technical field more specifically refers to a self expanding type pipeline energy isolation device. BACKGROUND

[0002] In the maintenance of petroleum chemical plant, energy isolation is a key safety measure, its purpose is to control all dangerous energy sources in the operation area, to prevent possible safety accidents during production operation, mechanical or equipment construction, maintenance or project modification. Especially for the higher risk chemical process pipeline, equipment disconnection operation, hot work, into the restricted space or related maintenance work involving serious dangerous chemicals (including flammable, explosive, toxic, reactivity, high pressure or high temperature chemical substances), in principle, must have the protection of secondary isolation point, such as installing blind plate as isolation point. Removing pipeline plus blind plate, double cut valve and opening the guide pipeline valve between double valve, single valve closing and opening guide pipeline is a common mechanical isolation energy method. But for the crisscross system pipeline, there is no disconnectable pipeline, flange and valve around the pipeline needing maintenance, it is difficult to isolate energy with conventional methods.

[0003] In order to solve the above problems, although some plugging isolation devices appear on the market, such as the utility model patent with the authorization announcement number CN209213267U, a kind of pipeline sealing expansion joint, it includes positioning middle shaft and sequentially sets first limiting sleeve, expansion sleeve and second limiting sleeve on positioning middle shaft, first limiting sleeve and second limiting sleeve move towards each other to extrude expansion sleeve, expansion sleeve is extruded along the axial direction of positioning middle shaft and simultaneously expands along the radial direction of positioning middle shaft. The scheme forms axial extrusion effect on expansion sleeve, so that the whole joint can be used for different diameter pipelines as plugging joint or air tightness detection piece.

[0004] However, the pipeline sealing expansion joint can only form a single sealing isolation layer, and can only be used for the sealing isolation of the same diameter pipeline. For more complex pipelines, such as variable diameter pipelines, special-shaped pipelines and pressure vessels, the plugging isolation effect is poor, displacement easily occurs on variable diameter pipelines or special-shaped pipelines, leading to plugging leakage. At the same time, for pressure vessels, the extrusion force formed by the expansion sleeve alone is also difficult to provide enough pressure to offset the pressure applied in the pressure vessel, resulting in the sealing expansion joint being pushed out by the pressure in the pressure vessel. UTILITY MODEL CONTENTS

[0005] The utility model aims at providing a self expanding type pipeline energy isolation device to solve the problems of poor plugging effect, poor pressure resistance and difficulty in applying to complex pipeline plugging isolation operation of the existing pipeline plugging device.

[0006] The utility model discloses the following technical scheme is adopted:

[0007] A self-expanding pipeline energy isolation device, comprising a main shaft rod, characterized in that: a fixed block, at least two expansion sealing sleeves and a moving block are sequentially sleeved on the main shaft rod, a separation gasket is arranged between the adjacent two expansion sealing sleeves, the fixed block and the moving block move towards each other along the main shaft rod to extrude the expansion sealing sleeve, and the expansion sealing sleeve moves in a shrinkage deformation mode along the axial direction of the positioning main shaft rod and simultaneously moves in an expansion deformation mode along the radial direction of the positioning central axis after being pressed.

[0008] Further, the expansion sealing sleeves are of the same or different sizes.

[0009] Preferably, the expansion sealing sleeves are made of elastic rubber material.

[0010] Further, the main shaft rod is a screw rod, the fixed block is fixedly connected to the end of one end of the main shaft rod, a moving nut is threadedly connected to the other end of the main shaft rod, the moving nut supports the moving block, and the moving block moves towards the fixed block by screwing the moving nut.

[0011] Further, the other end of the main shaft rod is also sleeved with a nut wrench sleeve for screwing the moving nut.

[0012] Further, the nut wrench sleeve comprises a nut sleeve, a sleeve connecting rod and a twisting wrench, the nut sleeve is matched with the moving nut, the sleeve connecting rod is a hollow connecting rod, and the two ends of the sleeve connecting rod are fixedly connected with the nut sleeve and the twisting wrench respectively.

[0013] Further, the end of the other end of the main shaft rod is also provided with a handle.

[0014] From the above description of the structure of the utility model, compared with the prior art, the utility model has the following advantages:

[0015] 1. The two expansion sealing sleeves of the utility model can form two sealing isolation rings in the same diameter pipeline after being extruded and stressed, further strengthening the plugging effect of the same diameter pipeline, and in the complex pipeline such as the variable diameter pipeline, the special-shaped pipeline or the connecting pipe of the pressure container, the two sealing isolation rings can automatically adapt to the change of the inner diameter of the pipeline, form two sealing isolation rings with different diameters, ensure the stability and reliability of the sealing isolation, effectively guarantee the safety of operation, and have wide application range and strong practicality.

[0016] 2. The self-expanding pipeline energy isolation device of the utility model comprises a main shaft rod, a fixed block, at least two expansion sealing sleeves, a moving block, a moving nut, a nut wrench sleeve and a handle, is simple in design, does not need complex structural components, is simple to operate, and is convenient for production and maintenance.

[0017] 3、The utility model discloses each expansion seal cover's size specification is same or different, namely the utility model discloses can according to actual demand, replace two same specifications, or one big one small expansion seal cover, to make the change range of expansion seal cover be bigger, to satisfy more different pipeline's plugging operation, adapt to more equipment and pipeline. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 It is the exploded view schematic diagram of the utility model.

[0019] Figure 2 It is the operation schematic diagram of the utility model in the same diameter pipeline.

[0020] Figure 3 It is the operation schematic diagram of the utility model in the variable diameter pipeline.

[0021] Figure 4 It is the operation schematic diagram of the utility model in the pressure vessel connecting pipe.

[0022] Wherein, the reference numeral in the drawing is: main shaft rod 11, fixed block 12, expansion seal cover 13, separation gasket 14, moving block 15, moving nut 16, nut wrench cover 17, nut cover sleeve 171, sleeve connecting rod 172, torsion wrench 173, handle 18;Same diameter pipeline 20, variable diameter pipeline 30, pressure vessel 40, weld 50. DETAILED DESCRIPTION

[0023] The specific implementation of the utility model embodiment is explained below with reference to the drawings.

[0024] Referring to Figures 1 to 3 A self-expanding pipeline energy isolation device, comprising a main shaft rod 11, the main shaft rod 11 is preferably a screw rod;The main shaft rod 11 is sequentially sleeved with a fixed block 12, at least two expansion seal covers 13, a moving block 15, a moving nut 16, a nut wrench cover 17 and a handle 18 from one end to the other end. A separation gasket 14 is arranged between the two adjacent expansion seal covers 13, and the fixed block 12 and the moving block 15 move towards each other along the main shaft rod 11 to extrude the expansion seal cover 13. After the expansion seal cover 13 is extruded, it moves in the axial direction of the positioning main shaft rod 11 and simultaneously moves in the radial direction of the positioning central axis, that is, the expansion seal cover 13 extrudes and forms a sealed isolation ring in the pipeline.

[0025] Referring to Figure 1Specifically, the fixed block 12 can be fixedly connected to the end of the main shaft rod 11 by welding or screwing, etc., the expansion sealing sleeve 13, the moving block 15, the moving nut 16 and the nut wrench sleeve 17 are sequentially movably sleeved on the main shaft rod 11, and the handle 18 is fixed to the other end of the main shaft rod 11 by square clamping.

[0026] The expansion sealing sleeve 13 of the utility model is preferably made of elastic rubber material, and has preferable elasticity and sealing effect. The number of the expansion sealing sleeves 13 is at least two, and two expansion sealing sleeves 13 are taken as an example in the embodiment, and a separation gasket 14 is arranged between the two expansion sealing sleeves 13 and movably sleeved on the main shaft rod 11. The expansion sealing sleeves 13 have the same or different sizes, the expansion sealing sleeves 13 with the same size will form two expansion rings with basically the same diameter after being extruded and deformed, and the expansion sealing sleeves 13 with different sizes will form two expansion rings with different diameters in the radial direction after being extruded and deformed. The utility model can select the required expansion sealing sleeve 13 according to different types of pipelines or other requirements. As a supplement, the expansion sealing sleeves 13 with different sizes generally refer to different rubber materials, different axial lengths of the expansion sealing sleeves 13 or different radial diameters of the expansion sealing sleeves 13.

[0027] Referring to Figure 1 The moving nut 16 and the nut wrench sleeve 17 of the utility model are matched with the main shaft rod 11, the moving nut 16 is preferably an outer hexagonal nut, the moving nut 16 is threadedly connected with the main shaft rod 11, and the moving nut 16 is supported on the moving block 15, and the moving block 15 can be driven to move towards the fixed block 12 by screwing the moving nut 16. The nut wrench sleeve 17 is used for screwing the moving nut 16, and comprises a nut sleeve 171, a sleeve connecting rod 172 and a torsion wrench 173. The nut sleeve 171 is matched with the moving nut 16, and is preferably an inner hexagonal nut sleeve 171, the sleeve connecting rod 172 is a hollow connecting rod, the hollow connecting rod is sleeved on the main shaft rod 11, and the two ends of the sleeve connecting rod 172 are fixedly connected with the nut sleeve 171 and the torsion wrench 173 respectively. The nut wrench sleeve 17 of the utility model can be an integrally formed injection molding part or a cast part, or can be a metal part welded together, and the embodiment is preferably a metal part welded together, that is, the nut sleeve 171, the sleeve connecting rod 172 and the torsion wrench 173 are metal parts, one end of the sleeve connecting rod 172 is welded with the nut sleeve 171, and the outer side wall of the other end is welded with the torsion wrench 173.

[0028] As Figure 2 and Figure 3As shown, when repairing the weld 50 crack and leakage on the same diameter pipe 20 and the variable diameter pipe 30, the end of the main shaft 11 of this utility model with the fixing block 12, the expansion sealing sleeve 13 and the moving block 15 are first inserted into the same diameter pipe 20 or the variable diameter pipe 30, and the expansion sealing sleeve 13 is kept at a certain distance from the weld 50 to avoid the welding being burned by heat.

[0029] Subsequently, the torsion wrench 173 of the twisting nut wrench 17 is twisted, thereby turning the movable nut 16, driving the movable block 15 to move towards the fixed block 12, compressing the two expansion sealing sleeves 13, forming two sealing isolation rings. In the same-diameter pipe 20, the two sealing isolation rings of this invention can further ensure the sealing effect of the isolation device, that is, improve the pipe's sealing performance and frictional resistance for pressure resistance; in the variable-diameter pipe 30 or irregular-shaped pipe, the two expansion sealing sleeves 13 can form two sealing isolation rings of different diameters to adapt to the diameter changes of the variable-diameter pipe 30 or irregular-shaped pipe, thereby ensuring the sealing effect of the variable-diameter pipe 30 or irregular-shaped pipe.

[0030] Then, remove the handle 18, pull out the nut wrench 17, cut the old weld 50 on the pipe of the same diameter 20 or the reducing pipe 30, grind the bevel, and then assemble and weld the new pipe. Finally, reinstall the nut wrench 17 and handle 18, turn the movable nut 16 in the opposite direction to release the pressure on the expansion sealing sleeve 13, and remove the utility model from the pipe. Thus, the leak repair of weld 50 is completed.

[0031] like Figure 4 As shown, during the sealing and isolation operation of the pressure vessel 40 pipe replacement, this invention uses two expansion sealing sleeves 13. One expansion sealing sleeve 13 is inside the pipe opening of the pressure vessel 40, while the other expansion sealing sleeve 13 extends out of the pipe opening and into the pressure vessel 40. At this time, the two expansion sealing sleeves 13 form two sealing isolation rings of different diameters. The larger sealing isolation ring can completely block the pipe opening from the inner wall of the pressure vessel 40, while the smaller sealing isolation ring blocks the pipe inside the pressure vessel 40. This ensures that even under the pressure of the pressure vessel 40, this invention can still provide a stable and reliable energy isolation effect.

[0032] The above are merely specific embodiments of this utility model, but the design concept of this utility model is not limited thereto. Any non-substantial modifications made to this utility model using this concept shall be considered as an infringement of the protection scope of this utility model.

Claims

1. A self-expanding pipe energy isolation device comprising a main shaft, characterized in that: The main shaft rod is sequentially sleeved with a fixed block, at least two expansion sealing sleeves and a moving block, a separation gasket is arranged between two adjacent expansion sealing sleeves, the fixed block and the moving block move towards each other along the main shaft rod to extrude the expansion sealing sleeves, the expansion sealing sleeves are subjected to shrinkage deformation movement along the axial direction of the main shaft rod and at the same time are subjected to expansion deformation movement along the radial direction of the main shaft rod.

2. A self-expanding pipe energy isolation device according to claim 1, wherein: The expansion sealing sleeves are of the same size or different sizes.

3. A self-expanding pipe energy isolation device according to claim 1, wherein: The expansion sealing sleeves are made of elastic rubber material.

4. A self-expanding pipe energy isolation device according to claim 1, wherein: The main shaft rod is a screw rod, the fixed block is fixedly connected to the end of one end of the main shaft rod, a moving nut is further threadedly connected to the other end of the main shaft rod, the moving nut supports the moving block, and the moving nut is twisted to drive the moving block to move towards the fixed block.

5. A self-expanding pipe energy isolation device according to claim 4, wherein: The other end of the main shaft rod is further sleeved with a nut wrench sleeve for twisting the moving nut.

6. A self-expanding pipe energy isolation device according to claim 5, wherein: The nut wrench sleeve comprises a nut sleeve, a sleeve connecting rod and a twisting wrench, the nut sleeve is matched with the moving nut, the sleeve connecting rod is a hollow connecting rod, and the two ends of the sleeve connecting rod are fixedly connected with the nut sleeve and the twisting wrench respectively.

7. A self-expanding pipe energy isolation device according to claim 4, wherein: The end of the other end of the main shaft rod is further provided with a handle.

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