CN114923060A - Plugging device for pipeline and loading and unloading method of plugging device - Google Patents

Abstract

The invention discloses a plugging device for a pipeline and a loading and unloading method of the plugging device, and relates to the technical field of pipeline plugging. The plugging device for the pipeline and the loading and unloading method of the plugging device can reduce the size of a plugging space and can be adjusted to meet the pipeline sealing requirements of different pipe diameters. The pipeline cleaning device is simple in structure, easy to disassemble and assemble and convenient to operate, and foreign matter residues can be avoided after disassembly to influence the cleanliness of the pipeline.

Description

Plugging device for pipeline and loading and unloading method of plugging device

Technical Field

The invention relates to the technical field of pipeline plugging, in particular to a plugging device for a pipeline and a loading and unloading method of the plugging device.

Background

The gas shielded welding can weld most metal materials and is widely applied to the fields of nuclear energy, aerospace, petrochemical industry, ship industry and the like. The argon tungsten-arc welding is the most popular, and the principle of the argon tungsten-arc welding is that under the protection of argon gas with certain concentration, a welding method of melting a base metal and a welding wire by using electric arc to generate heat so as to form a joint molten pool is adopted. Good forming, visible electric arc and molten pool, convenient operation and reliable quality. And need the welding seam bottoming, the pipeline groove is close to the inside part and directly exposes in the air, is difficult to guarantee argon gas concentration, and then forms metal oxide, influences welding quality, increases the tungsten utmost point degree of burning loss. Therefore, a device/structure is needed to seal the periphery of the welding seam to form a closed space, and the welding seam can be welded after sufficient argon gas reaches a certain concentration.

There are mainly three types of plugging structures on the current market: 1. plastic end caps/foam plugs. The material is common in construction, a welder drills a plastic end cap for supplying the pipe to insert an air guide hose and then repeatedly utilizes the plastic end cap, a circular baffle is manufactured by manually cutting a foam board according to the size of a common pipeline, and adhesive tapes are wound around the circular baffle to protect the outer skin. 2. A water-soluble adhesive tape. Generally at pipeline port or inside, form sealed face by manual pasting of welder, this kind of mode can be used for the pipeline of different pipe diameters, but the glue that just easily remains of inefficiency, needs to get rid of with hot-blast gun or angle mill under the condition of time of a specified duration, otherwise the residue influences groove welding and pipeline and sweeps the cleanliness, buries down hidden danger for the pressure test and the technology debugging in later stage. 3. An inflatable rubber plugging element. The device is widely applied in the market, convenient to disassemble and assemble and good in sealing performance, but the size of the expanded air bag is relatively fixed, the device with different sizes needs to be replaced to guarantee when various caliber pipelines are welded, and the application range is narrow.

Disclosure of Invention

The invention aims to: in view of the above problems, the present invention provides a plugging device for a pipeline and a method for assembling and disassembling the plugging device, which can reduce the size of the plugging space and can be adjusted to meet the pipeline sealing requirements of different pipe diameters. The novel pipeline welding device is simple in structure, easy to disassemble and assemble and convenient to operate, can avoid foreign matter residues from influencing the cleanliness of the pipeline after disassembly, and is particularly suitable for pipeline welding technology.

The technical scheme adopted by the invention is as follows:

the utility model provides a plugging device for pipeline, includes first splint, second splint, shutoff component and size adjustment device, first splint and second splint set up in the both ends of shutoff component relatively, but the shutoff component is elastic deformation's capsular structure, size adjustment device is connected with first splint and second splint are adjustable, first splint accessible size adjustment device adjusts the interval between its and the second splint, the last intercommunication of shutoff component is for the inside filling device who sends into the filling medium of shutoff component, be equipped with the component that opens and shuts between filling device and the shutoff component.

Further, the first clamping plate, the blocking element and the second clamping plate are all sleeved on a size adjusting device, the size adjusting device is of a hollow rod-shaped structure, and a conveying channel capable of conveying fluid is formed inside the size adjusting device.

Furthermore, the end of the size adjusting device is detachably connected with an air-dredging element which can enable the fluid in the conveying channel to be uniformly diffused to the external environment, or is detachably connected with a plug which can prevent the fluid from entering and exiting the conveying channel.

Further, size adjusting device is equipped with outer end silk mouth, connecting portion and inner end silk mouth along length direction in proper order, outer end silk mouth department threaded connection has the adjusting nut of restriction first splint, inner end silk mouth department threaded connection has the stopping nut of restriction second splint.

Due to the adoption of the technical scheme, the outer end screw port provides a stroke for the adjusting nut, and the inner end screw port is provided with the retaining nut to provide supporting force for the second clamping plate.

Furthermore, the first clamping plate comprises a first connecting surface matched with the blocking element and a first assembling surface arranged opposite to the first connecting surface, a supporting seat is arranged on the first assembling surface, the supporting seat is sleeved on the size adjusting device, and the adjusting nut can abut against the supporting seat on the first assembling surface; the second clamping plate comprises a second connecting surface matched with the blocking element and a second assembling surface arranged opposite to the second connecting surface, a supporting seat is arranged on the second assembling surface, the size adjusting device is sleeved with the supporting seat, and the stop nut can abut against the supporting seat on the second assembling surface.

Due to the adoption of the technical scheme, the supporting seat plays a role in pressure conduction, and friction loss between the first clamping plate and the adjusting nut and between the second clamping plate and the retaining nut is reduced.

Furthermore, the supporting seat is respectively arranged at the center of the first assembling surface and the center of the second assembling surface, and the splint fillet extends from the supporting seat to the edge parts of the first assembling surface and the second assembling surface, and is uniformly distributed on the first assembling surface and the second assembling surface along the circumferential direction.

Further, a traction element is connected to the first clamping plate.

Further, a fiber net is arranged on the blocking element.

Owing to adopted above-mentioned technical scheme, the fibre web is used for reducing to extrude the outer inflation portion of first splint and second splint to first splint and the outside deformation of second splint, the direction of control shutoff component extrusion deformation.

Correspondingly, the invention also discloses a loading and unloading method of the plugging device, which comprises the following steps: a placing step: placing the first clamping plate at a specified position in the pipeline in the direction of the outside of the pipe orifice;

and (3) expanding the plugging element: opening the opening and closing element, conveying a filling medium into the plugging element by the filling device until the plugging element is in an expansion state, closing the opening and closing element, and stopping conveying the filling medium into the plugging element by the filling device;

an adjusting step: shortening the distance between the first clamping plate and the second clamping plate through a size adjusting device until the plugging element is fully contacted with the inner wall of the pipeline;

and (3) disassembling: and opening the opening and closing element, releasing the filling medium and taking out the plugging device.

Further, the size adjusting device is a hollow rod-shaped structure, and a conveying channel capable of conveying fluid is formed inside the size adjusting device; before placement and arrangement, an air-dredging element which can enable fluid in the conveying channel to be uniformly diffused to the external environment or a plug which can prevent the fluid from entering and exiting the conveying channel can be arranged at one end of the size adjusting device matched with the second clamping plate according to requirements; after the conditioning step is completed, fluid may be delivered into the conduit by a size adjustment device as desired.

In summary, due to the adoption of the technical scheme, the invention has the beneficial effects that:

1. the plugging element has controllable deformation and is suitable for pipelines with various pipe diameters.

2. The invention does not need to be provided with compressed air to inflate the plugging element, but a common inflating device can close the opening and closing element and tightly press the first clamping plate and the second clamping plate, so that the pressure in the plugging element is increased to expand the plugging element, and the sealing property of the pipeline is ensured.

3. In the process of dismounting, residues such as viscose glue and the like can not be formed or the pipeline can not be damaged, and the later-stage blowing and cleaning work is facilitated.

4. The invention has compact and simple structure: the multifunctional gas conveying screw has multiple functions, can convey gas and can provide a movement stroke and thrust for the first clamping plate.

5. The invention can facilitate the welder to quickly plug, disassemble and recover by the charging and discharging of the plugging element and the traction of the traction element.

6. The mounting position of the plugging element can be freely operated by a welder and placed around a welding seam, so that the space is reduced, and unnecessary waste of argon is reduced.

Drawings

FIG. 1 is a schematic view of the overall structure of the present invention;

FIG. 2 is a front view of the first cleat of the invention;

FIG. 3 is a side view of a first cleat of the invention;

FIG. 4 is a front view of a second cleat of the invention;

FIG. 5 is a side view of a second splint of the present invention;

FIG. 6 is a schematic view of the structure of the size adjusting apparatus of the present invention;

FIG. 7 is a schematic view of the construction of the air evacuation element of the present invention;

fig. 8 is a schematic structural diagram of the plug of the present invention.

The labels in the figure are: 1-a pipeline, 2-a weld joint, 3-an opening and closing element, 4-a filling device, 5-a size adjusting device, 6-an adjusting nut, 7-a supporting seat, 8-a first clamping plate, 9-a second clamping plate, 10-a plugging element, 11-a fiber net, 12-a retaining nut, 13-a traction element, 14-a gas-dispersing element, 15-a filling pipe hole, 16-a clamping plate fillet, 17-a traction connecting part, 18-a first assembling surface, 19-a joint, 20-an outer end screw opening, 21-an inner end screw opening, 22-a gas-dispersing hole, 23-a plug and 24-a second assembling surface.

Detailed Description

The present invention will be described in detail below with reference to the accompanying drawings.

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and do not limit the invention.

Example 1

The utility model provides a plugging device for pipeline 1, as shown in fig. 1-8, includes first splint 8, second splint 9, shutoff component 10 and size adjusting device 5, first splint 8 and second splint 9 set up relatively in the both ends of shutoff component 10, shutoff component 10 is elastically deformable's vesicular structure, size adjusting device 5 is connected with first splint 8 and second splint 9 are adjustable, first splint 8 accessible size adjusting device 5 adjusts the interval between its and the second splint 9, be communicated to send into the filling device 4 of filling medium for the inside of shutoff component 10 on the shutoff component 10, be equipped with the component 3 that opens and shuts between filling device 4 and the shutoff component 10. The filling medium chosen in this embodiment is air.

The first clamping plate 8, the blocking element 10 and the second clamping plate 9 are all sleeved on the size adjusting device 5, the size adjusting device 5 is of a hollow rod-shaped structure, and a conveying channel capable of conveying fluid is formed inside the size adjusting device.

A filling pipe hole 15 penetrating through the first clamping plate 8 is formed in the first clamping plate 8, the filling device 4 is communicated with the blocking element 10 through the filling pipe hole 15, and a joint 19 for connecting a pipe body is arranged at one end, matched with the first clamping plate 8, of the size adjusting device 5.

The end of the size adjusting device 5 is detachably connected with a gas-dispersing element 14 which can uniformly disperse the fluid in the conveying channel to the external environment, or is detachably connected with a plug 23 which can prevent the fluid from entering and exiting the conveying channel. Specifically, the gas-permeable element 14 is a porous structure having a plurality of gas-permeable holes 22, and the gas-permeable holes 22 can be formed by diffusing a fluid in multiple directions, in this embodiment, the selected fluid is argon gas, and the gas-permeable element 14 can ensure that the argon gas is uniformly diffused at the crater 2, so as to quickly exhaust the air at the crater 2, thereby ensuring the welding quality.

Size adjusting device 5 is equipped with outer end screw mouth 20, connecting portion and inner end screw mouth 21 in proper order along length direction, outer end screw mouth 20 department threaded connection has the adjusting nut 6 of the first splint 8 of restriction, inner end screw mouth 21 department threaded connection has the stopping nut 12 of restriction second splint 9. Specifically, the external screw port 20 provides a stroke for the adjusting nut 6, and the internal screw port 21 is provided with the retaining nut 12 for providing a supporting force for the second clamping plate 9. Preferably, the adjusting nut 6 is a lug nut.

The first clamping plate 8 comprises a first connecting surface matched with the blocking element 10 and a first assembling surface 18 arranged opposite to the first connecting surface, a supporting seat 7 is arranged on the first assembling surface 18, the supporting seat 7 is sleeved on the size adjusting device 5, and the adjusting nut 6 can abut against the supporting seat 7 on the first assembling surface 18; the second clamping plate 9 comprises a second connecting surface matched with the blocking element 10 and a second assembling surface 24 arranged opposite to the second connecting surface, a supporting seat 7 is arranged on the second assembling surface 24, the size adjusting device 5 is sleeved with the supporting seat 7, and the stopping nut 12 can abut against the supporting seat 7 on the second assembling surface 24. Specifically, the support base 7 functions to conduct pressure and reduce friction loss between the first clamping plate 8 and the adjusting nut 6 and between the second clamping plate 9 and the retaining nut 12. Preferably, the supporting seat 7 is a circular truncated cone or a trapezoidal truncated cone structure.

The supporting seat 7 is respectively arranged at the center of the first assembling surface 18 and the center of the second assembling surface 24, the clamping plate fillets 16 extend from the supporting seat 7 to the edge portions of the first assembling surface 18 and the second assembling surface 24, and the clamping plate fillets 16 are uniformly distributed on the first assembling surface 18 and the second assembling surface 24 along the circumferential direction.

A traction element 13 is connected to the first clamping plate 8. The first clamping plate 8 is provided with a traction connection 17 near the center, and the traction element 13 is connected to the first clamping plate 8 through the traction connection 17. In particular, it is possible to check whether the plugging element 10 is tight plugging the pipeline 1 by pulling the pulling element 13 after expansion of the plugging element 10 and also to pull the pulling element 13 to quickly retrieve the plugging element 10 when the plugging element 10 is deep in the pipeline 1.

The blocking element 10 is provided with a fiber web 11. The both ends that plugging element 10 is close to first splint 8 and second splint 9 are located respectively to fibre mesh 11, fibre mesh 11 includes a plurality of fibre rings, and is a plurality of the fibre ring uses first splint 8 and second splint 9 respectively to form concentric circle structure as the centre of a circle, and preferably, the fibre ring of minimum is greater than the external diameter of first splint 8 and second splint 9, and specifically speaking, fibre mesh 11 is used for reducing to extrude the outer inflation portion of first splint 8 and second splint 9 and to first splint 8 and the outside deformation of second splint 9, the direction of control plugging element 10 extrusion deformation.

Example 2

A method of loading and unloading a plugging device, as shown in fig. 1, comprising the steps of:

a placing step: placing the first clamping plate 8 in the pipeline 1 at a position which is 1m-1.5m away from the weld joint 2 in the direction of the outside of the pipe orifice, and leading the traction element 13 out of the pipe 1 orifice;

the expansion step of the plugging element 10: opening the opening and closing element 3, conveying air serving as a filling medium into the plugging element 10 by the filling device 4 until the plugging element 10 is in an expansion state, closing the opening and closing element 3, and stopping conveying the filling air into the plugging element 10 by the filling device 4;

and (3) adjusting: screwing an adjusting nut 6 on the size adjusting device 5, shortening the distance between a first clamping plate 8 and a second clamping plate 9 until the plugging element 10 is fully contacted with the inner wall of the pipeline 1, slightly pulling the size adjusting device 5 or a traction element 13 to check whether the expanded plugging element 10 tightly plugs the pipeline 1, and repeating the step if the plugging element 10 is loose;

disassembling: the opening and closing element 3 is opened, the filling medium is released, and the plugging device is taken out.

Example 3

Example 3 is a further modification to example 2; further, the same parts are not described in detail, and as shown in fig. 1 to 8, the size adjusting device 5 is a hollow rod-shaped structure and forms a conveying channel capable of conveying fluid inside; before the arrangement, an air-dredging element 14 which can enable fluid in a conveying channel to be uniformly diffused to the external environment and a plug 23 which can prevent the fluid from entering and exiting the conveying channel are respectively arranged on the two sets of plugging devices, the two sets of plugging devices are respectively arranged at two ends of a welded junction 2, after the adjustment step is completed, argon is conveyed into the pipeline 1 through the plugging devices provided with the air-dredging element 14, so that air is quickly discharged from the position of the welded junction 2, welding can be carried out after the argon concentration is detected to be qualified by an instrument, after the welding operation is completed, the opening and closing elements 3 at two ends of the pipeline 1 are respectively opened and deflated, and the plugging devices are dragged out of the pipeline 1 by a traction element 13.

The principles and embodiments of the present invention are explained herein using specific examples, which are presented only to aid in understanding the method and its core concepts. It should be noted that, for those skilled in the art, it is possible to make various improvements and modifications to the present invention without departing from the principle of the present invention, and those improvements and modifications also fall within the scope of the claims of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings or the orientations or positional relationships that the products of the present invention are conventionally placed in use, and are only used for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Claims (10)

1. The utility model provides a plugging device for pipeline, its characterized in that includes first splint, second splint, shutoff component and size adjusting device, first splint and second splint set up in the both ends of shutoff component relatively, but the shutoff component is elastically deformable's capsular structure, size adjusting device and first splint and second splint adjustable connection, first splint accessible size adjusting device adjusts the interval between its and the second splint, the last intercommunication of shutoff component is for the inside filling device who sends into the filling medium of shutoff component, be equipped with the component that opens and shuts between filling device and the shutoff component.

2. The plugging device of claim 1 wherein the first clamp plate, the plugging element and the second clamp plate are each fitted over a size adjustment device, the size adjustment device being of a hollow rod-like configuration and defining a fluid-carrying passageway therein.

3. The plugging device of claim 2, wherein the size adjustment device is adapted to have a vent member removably attached to an end of the size adjustment device to allow fluid in the delivery passage to be evenly dispersed to the external environment, or a stopper removably attached to the end of the size adjustment device to prevent fluid from entering or exiting the delivery passage.

4. A blocking device for a pipeline according to any one of claims 1 to 3, wherein the size adjustment means is provided with an outer threaded port, a connecting portion and an inner threaded port in the length direction in sequence, the outer threaded port is threadedly connected with an adjusting nut for limiting the first clamping plate, and the inner threaded port is threadedly connected with a retaining nut for limiting the second clamping plate.

5. The plugging device according to claim 4, wherein the first clamping plate comprises a first connecting surface matched with the plugging element and a first assembling surface arranged opposite to the first connecting surface, the first assembling surface is provided with a supporting seat, the supporting seat is sleeved on the size adjusting device, and the adjusting nut can abut against the supporting seat on the first assembling surface; the second clamping plate comprises a second connecting surface matched with the blocking element and a second assembling surface arranged opposite to the second connecting surface, a supporting seat is arranged on the second assembling surface, the size adjusting device is sleeved with the supporting seat, and the stopping nut can abut against the supporting seat on the second assembling surface.

6. The plugging device of claim 5, wherein the support base is disposed at the center of the first assembly surface and the second assembly surface, and the clamping plate strips extend from the support base to the edge portions of the first assembly surface and the second assembly surface, and are circumferentially and uniformly distributed on the first assembly surface and the second assembly surface.

7. The occlusion device, of claim 1, wherein a pulling element is attached to said first clamp plate.

8. The plugging device for a pipeline of claim 1, wherein a fiber mesh is provided on the plugging element.

9. The loading and unloading method of the plugging device is characterized by comprising the following steps:

a placing step: placing the first clamping plate at a specified position in the pipeline in the direction of the outside of the pipe orifice;

and (3) expanding the plugging element: opening the opening and closing element, conveying a filling medium into the plugging element by the filling device until the plugging element is in an expansion state, closing the opening and closing element, and stopping conveying the filling medium into the plugging element by the filling device;

an adjusting step: shortening the distance between the first clamping plate and the second clamping plate through a size adjusting device until the plugging element is fully contacted with the inner wall of the pipeline;

disassembling: and opening the opening and closing element, releasing the filling medium and taking out the plugging device.

10. The method for loading and unloading a closure device according to claim 9, wherein the size adjustment means is a hollow rod-like structure and has a fluid-conveying passage formed therein; before the placement and arrangement, an air-dredging element which can uniformly diffuse the fluid in the conveying channel to the external environment or a plug which can prevent the fluid from entering and exiting the conveying channel can be arranged at one end of the size adjusting device matched with the second clamping plate according to requirements; after the conditioning step is completed, fluid may be delivered into the conduit by a size adjustment device as desired.

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