CN108105524A - Air heave type plugging pipelines instrument with pressure relief - Google Patents

Abstract

The invention discloses a kind of air heave type plugging pipelines instruments with pressure relief, including being radially equipped with screw thread axis and the plug, hollow sleeve, Pipe couplings and the pressure relief that are sequentially arranged on thread spindle, the thread spindle is both ends open and the screwed pipe of inner hollow.Designed thread spindle is both ends open and the screwed pipe of inner hollow, one end installed plug of screw thread, its other end install the band pressure relief, when in use, on the one hand plug with airbag structure has blocked broken pipe, and when the pressure that the flow media (such as water) in pipeline generates plug reaches default safety value, the automatically opening of relief valve, flow media discharge line 13 is outer until external and internal pressure value reaches balance is realized by pressure relief, ensure that the safety of blocking pipe significantly；And pass through the Pipe couplings being mainly made of positioning panel and Duo Gen connecting rods, realize the secondary plugging to pipeline, the reliability of closure greatly improves.

Description

Inflatable line plugging tool with pressure relief structure

technical field

The invention relates to a pipeline sealing device, in particular to an inflatable pipeline sealing tool with a pressure relief structure.

Background technique

my country's pipeline technology has been continuously promoted and applied with the needs of people's lives and urban construction. Almost all walks of life will be applied to pipelines, such as water pipelines and waste water pipelines in water supply systems, natural gas transportation pipelines in natural gas supply systems, fresh water pipelines on ships, fuel supply pipes, and boiler steam pipes. During the use of these pipelines, affected by the impact of external force, the aging of the pipeline itself or the corrosion of the transported medium, etc., the pipeline often breaks, the pipeline is damaged, and the transported water, natural gas, fuel oil and other transported media leak. The fault not only creates a great potential safety hazard, but also causes great property loss. Therefore, for pipeline leakage or fracture faults, the broken or leaking pipeline is generally sealed and plugged by a block and then the damaged pipeline is replaced in real time.

At present, the traditional leak plugging method mainly uses cork and broken rags to seal the damaged pipe orifice. The traditional leak plugging method is complicated to operate, takes a long time to plug, and requires a lot of manpower. In addition, when using traditional pipeline plugging tools, The medium in the pipeline can be directly sealed in the pipeline. Since the accumulated pressure of the medium in the pipeline gradually increases, when the pressure in the pipeline accumulates to a certain level, the force on both sides of the blocked pipeline will be unbalanced. When the medium inside is flushed away, it will bring great danger to the maintenance and replacement of the pipeline, especially when the medium transported by the pipeline is flammable and explosive medium such as natural gas and oil, it will bring great harm.

In view of the above-mentioned technical problems, various improved pipeline sealing tools have appeared in the prior art. For example, the Chinese utility model patent with the authorized announcement number 203099206U discloses a pipeline sealing device, which includes a ball and a leaking valve. The pressure pipe has a pressure relief hole in the sphere, the inner end of the pressure relief pipe is fixed in the pressure relief hole, and a valve is fixedly installed on the pressure relief pipe. The plugging device of this structure can quickly discharge the medium in the pipeline by providing a pressure relief hole in the ball and with the cooperation of the pressure relief pipe, which can effectively improve the safety of pipeline sealing. However, there are still the following defects: 1) the sphere used to seal the pipeline and the inner wall of the pipeline cannot be seamlessly sealed, and the plugging effect still needs to be improved; When the connection between the pressure tube and the sphere becomes loose, it will lose the effect of releasing pressure on the pipeline during sealing, and the stability of pressure relief will be low; 3) The sphere is directly blocked on the inner wall of the pipeline, and there is no corresponding connection/fixation between the sphere and the pipeline device, the safety and stability of pipeline plugging need to be improved.

Contents of the invention

In view of the above-mentioned deficiencies, the technical problem to be solved by the present invention is to provide an inflatable pipeline plugging tool with a pressure relief structure that is simple in structure, fast in plugging operation, and integrates plugging and pressure relief.

In order to achieve the above object, the present invention is achieved through the following technical solutions:

An inflatable pipeline plugging tool with a pressure relief structure, including a threaded shaft radially provided and a plug installed on the threaded shaft in sequence, a hollow sleeve, a pipeline connection mechanism and a pressure relief structure, the threaded shaft It is a threaded tube with openings at both ends and a hollow interior, where

The plug used to block the pipeline includes an inflatable tube, an inflatable ball valve, n air bags and n+1 circular splints, and the circular splints are coaxially installed on the threaded shaft in turn and each two An air bag is installed between the circular splints, and the air bag is coaxially installed on the threaded shaft with the circular splints. One end of the inflation tube is connected to the inflatable ball valve, and the other end of the air bag is inserted into the circular splints in turn. Communicate with each airbag, where n is an integer ≥ 1;

The hollow sleeve penetrates into the threaded shaft and one end of the hollow sleeve is fixed on the plug, and the other end is provided with a tightening part for fixing the plug, and the tightening part is threaded on the threaded shaft, and the One end of the pipe connection mechanism can be freely connected to the pipe, and the other end is threaded with the threaded shaft;

The pressure relief structure for properly discharging the medium in the pipeline includes a pressure relief valve, one end of the pressure relief valve is connected to the threaded shaft through a flange, and the other end is connected to a communication pipe.

In the above solution, the pipeline connection mechanism used to realize the connection between the plugging tool and the pipeline may include a positioning panel and at least two connecting rods, the positioning panel is slidably connected to the threaded shaft through fasteners and positioned The cross-sectional area of the panel is larger than that of the plug. One end of the connecting rod is hinged on the side wall of the positioning panel, and the other end is provided with a hook for connecting the pipe.

In the above solution, further, the tightening member includes a first connecting sleeve and two rotating handles, the first connecting sleeve penetrates into the threaded shaft and a tightening nut is respectively installed at both ends of the first connecting sleeve, The tightening nut is threadedly connected with the threaded shaft, and two rotating handles are arranged symmetrically on both sides of the threaded shaft and fixed on the first connecting sleeve.

In the above solution, the fastener used includes a second connecting sleeve, the second connecting sleeve penetrates into the threaded shaft and the positioning panel is vertically installed on the second connecting sleeve, and the positioning panel is installed vertically on the second connecting sleeve. A tightening nut is respectively installed at both ends, and the tightening nut is threadedly connected with the threaded shaft.

In the above scheme, in order to enhance the stability and connection strength of the pipeline connection mechanism, at least three support plates can be connected between the positioning panel and the second connection sleeve, one end of each support plate is fixed on the positioning panel, and the other end fixed on the second connecting sleeve.

In the above solution, in order to realize the intelligent control of the pressure relief valve, the pressure relief structure also includes a pressure sensor, an input button and a controller, the pressure sensor is installed in the threaded shaft and connected to the input end of the controller, and the input The button is connected to the input end of the controller, the output end of the controller is connected to the control end of the pressure relief valve, and the I/O interface of the controller is connected to a remote monitoring host computer through a wireless communication module.

The beneficial effects of the present invention are:

1) The plug used in the present invention comprises n air bags and n+1 circular splints, which are inflated into each air bag through an inflation tube and an inflatable ball valve. The air bag is extruded and deformed, extending around and seamlessly fitting the circular splints and the inner wall of the pipe to form multiple airtight sealing cavities. It has the characteristics of simple structure, convenient operation and remarkable sealing effect.

2) Through the pipeline connection mechanism mainly composed of a positioning panel and more than two connecting rods evenly distributed on the side of the positioning panel, when in use, fix the plug and then fix the hook on the connecting rod on the pipeline The flange plate, and finally the positioning panel is fixed on the threaded shaft by the fastener, and the positioning panel installed on the threaded shaft is tightened through the connection between the flange plate and the connecting rod, so as to realize the secondary sealing of the pipeline. The reliability of plugging is greatly improved.

3) The designed threaded shaft is a threaded pipe with openings at both ends and a hollow interior. A plug is installed at one end of the threaded shaft and the pressure relief structure is installed at the other end. When in use, the plug blocks the damaged pipe on the one hand When the pressure generated by the flowing medium (such as water) in the pipeline reaches the preset safety value, the pressure relief valve will automatically open and discharge the flowing medium out of the pipeline until the internal and external pressure values reach a balance, which greatly ensures the sealing of the pipeline safety.

Description of drawings

Fig. 1 is a schematic side view of the inflatable pipeline plugging tool with a pressure relief structure in use.

Fig. 2 is a schematic structural diagram of A-A side view of the positioning panel in Fig. 1 .

Fig. 3 is a structural schematic diagram of the pipeline connection mechanism.

Figure 4 is a schematic structural view of the plug.

The numbers in the figure are: 1. threaded shaft, 2. positioning panel, 3. plug, 3-1. circular splint, 3-2. air bag, 4. hollow casing, 5. rotating handle, 6. first connection Sleeve, 7, tightening nut, 8, second connecting sleeve, 9, connecting rod, 10, fixing nut, 11, support plate, 12, flange, 13, pipeline, 14, pressure relief valve, 15, method Lan, 16, connecting pipe, 17, inflatable ball valve, 18, inflatable pipe.

Detailed ways

As shown in Figure 1, the inflatable pipeline plugging tool with a pressure relief structure includes a threaded threaded shaft 1 along the radial direction and a plug 3 installed on the threaded shaft 1 in sequence, a hollow sleeve 4, and a pipe connection Mechanisms and relief structures. The threaded shaft 1 is a threaded pipe with open ends and a hollow interior, and the threaded pipe is specifically a threaded steel pipe.

As shown in FIG. 4 , the plug 3 used includes an inflatable tube 18 , an inflatable ball valve 17 , n airbags 3 - 2 and n+1 circular splints 3 - 1 , wherein n is an integer ≥ 1. In this embodiment, n=2, that is, 2 airbags 3-2, 3 circular splints 3-1, and the center of each circular splint 3-1 is provided with a through hole for threaded shaft 1 to penetrate. The circular splints 3-1 are sequentially coaxially installed on the threaded shaft 1 and one air bag 3-2 is installed between every two adjacent circular splints 3-1. The air bag 3-2 is coaxially installed on the threaded shaft 1 with the circular splint 3-1, and one end of the inflation tube 18 is connected with the inflatable ball valve 17, and the other end passes through the circular splints 3-1 successively. It communicates with each airbag 3-2. In this embodiment, the diameters of the circular splints 3 - 1 are consistent, and are 0.5-1.5 mm smaller than the inner diameter of the pipeline 13 to be blocked. The air bag 3-2 that adopts is made of extensible soft rubber air bag 3-2.

The hollow sleeve 4 penetrates into the threaded shaft 1 and one end of the hollow sleeve 4 is fixed on the plug 3, and the other end is provided with a tightening part for fixing the plug 3, and the tightening part is threadedly connected to the screw thread. on axis 1. The other side of the plug 3 opposite to the hollow pipe 13 is provided with a fixing nut 10 for fixing the plug 3 on the threaded shaft 1 by cooperating with the tightening parts. The tightening member includes a first connecting sleeve 6 and two rotating handles 5, the first connecting sleeve 6 penetrates into the threaded shaft 1 and a tightening nut 7 is respectively installed at both ends of the first connecting sleeve 6, so The tightening nut 7 is threadedly connected with the threaded shaft 1, and the two rotating handles 5 are arranged symmetrically on both sides of the threaded shaft 1 and fixed on the first connecting sleeve 6 respectively.

One end of the pipeline connection mechanism can be freely connected to the pipeline 13 , and the other end is screwed to the threaded shaft 1 . As shown in FIGS. 2 and 3 , the pipeline connection mechanism includes a positioning panel 2 and at least two connecting rods 9 . The positioning panel 2 is slidably connected to the threaded shaft 1 through fasteners, and the cross-sectional area of the positioning panel 2 is larger than that of the plug 3 . The positioning panel 2 is a circular solid steel plate. One end of the connecting rod 9 is hinged on the side wall of the positioning panel 2 , and the other end is provided with a hook for connecting the pipe 13 . At least three support plates 11 are connected between the positioning panel 2 and the second connecting sleeve 8 . In this embodiment, the number of the connecting rods 9 is four, and they are installed in a cross structure with the threaded shaft 1 as the center. One end of each support plate 11 is fixed on the positioning panel 2 , and the other end is fixed on the second connecting sleeve 8 .

The fastener includes a second connecting sleeve 8, the second connecting sleeve 8 penetrates into the threaded shaft 1 and the positioning panel 2 is vertically installed on the second connecting sleeve 8, and the positioning panel 2 is installed vertically on the second connecting sleeve 8. A tightening nut 7 is respectively installed at the two ends of each, and the tightening nut 7 is threadedly connected with the threaded shaft 1.

The pressure relief structure includes a pressure relief valve, one end of the pressure relief valve is connected to the threaded shaft 1 through a flange 15 , and the other end is connected to a communication pipe 16 . That is, the pressure relief structure is installed on the threaded shaft 1 together with the plug 3, and the pressure relief valve is specifically a shut-off valve. In order to realize the intelligent opening and closing of the control valve and set the safe starting value for the conveying medium in different pipelines 13, the pressure relief structure also includes a controller, an input button and a pressure sensor, and the pressure sensor is installed in the threaded shaft 1 and connected with the The input end of the controller is connected, the input button is connected with the controller, the output end of the controller is connected with the control end of the pressure relief valve, and the I/O interface of the controller is connected to a remote monitoring host computer through a wireless communication module.

As shown in Figure 1, the present invention when working:

1) Extend the plug 3 into the pipeline 13, and simultaneously inflate the airbag 3-2 through the inflatable ball valve 17 and the inflatable tube 18;

2) Then push the hollow sleeve 4 to move the plug 3 to a suitable position, turn the rotary handle 5, tighten the nut 7 to screw on the threaded shaft 1, and push the hollow sleeve 4 forward to squeeze each part of the plug 3 in sequence. The circular splints 3-1 are sequentially stressed by each circular splint 3-1, and the inflated airbags 3-2 are squeezed forward. Under the extrusion of the front and rear circular splints 3-1, each airbag 3-2 2 is deformed and extended to the surroundings, closely fitting the inner space of each circular splint 3-1 and the pipeline 13, forming 2 airtight sealing cavities, and finally tightening the tightening nut 7 on the rotating handle 5;

3) Hook the hook on the connecting rod 9 on the fixed flange 12 on the pipe 13, tighten the tightening nut 7 on the second connecting sleeve 8 to fix the positioning panel 2, and complete the sealing operation . And in the sealing process of pipeline 13 by plug 3, when the pressure generated by the flow medium (such as water) in pipeline 13 to plug 3 reaches a preset safety value, the pressure relief valve is automatically opened, and the flow medium is discharged from pipeline 13. It will automatically close when the internal and external pressure values reach a balance.

The above is only to illustrate the implementation of the present invention, and is not intended to limit the present invention. For those skilled in the art, any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be Included within the protection scope of the present invention.

Claims (6)

1. the air heave type plugging pipelines instrument with pressure relief, it is characterised in that：Including radially be equipped with screw thread axis (1) and Plug (3), hollow sleeve (4), Pipe couplings and the pressure relief being sequentially arranged on thread spindle (1), the thread spindle (1) it is both ends open and the screwed pipe of inner hollow,

The plug (3) includes gas tube (18), inflation ball valve (17), n air bag (3-2) and n+1 circular clamping plate (3-1), The circle clamping plate (3-1) is sequentially coaxially mounted on thread spindle (1) and pacifies between the adjacent circular clamping plate (3-1) of each two There are one the air bag (3-2), the air bag (3-2) is coaxially mounted to circular clamping plate (3-1) on thread spindle (1) dress, described One end of gas tube (18) be connected with inflation ball valve (17), its other end penetrate successively after each circle clamping plate (3-1) respectively with respectively Air bag (3-2) connects, and wherein n is >=1 integer；

The hollow sleeve (4) is penetrated in thread spindle (1) and one end of hollow sleeve (4) is fixed on plug (3), its other end Equipped with the part that screws for fixed plug (3), the part that screws is threaded on thread spindle (1), the Pipe couplings One end can freely be connected on pipeline (13), its other end is threadedly coupled with thread spindle (1)；

The pressure relief includes relief valve, one end of the relief valve is connected by flange (15) with thread spindle (1), its separately One end is connected with communicating pipe (16).

2. the air heave type plugging pipelines instrument according to claim 1 with pressure relief, it is characterised in that：The pipeline connects Connection mechanism includes positioning panel (2) and the connecting rod of at least 2 (9), and the positioning panel (2) passes through fastener slidable connection On thread spindle (1) and the cross-sectional area of positioning panel (2) is more than the cross-sectional area of plug (3), one end of the connecting rod (9) It is hinged on the side walls of positioning panel (2), its other end is equipped with grab to connecting pipe (13).

3. the air heave type plugging pipelines instrument according to claim 1 or 2 with pressure relief, it is characterised in that：The rotation Tight part includes the first connecting sleeve (6) and two rotating handleses (5), and it is interior and that the first connecting sleeve (6) penetrates thread spindle (1) The both ends of one connecting sleeve (6) are respectively equipped with one and tighten nut (7), and the nut (7) of tightening is threadedly coupled with thread spindle (1), Two rotating handleses (5) are respectively symmetrically located at the both sides of thread spindle (1) and are fixed in the first connecting sleeve (6).

4. the air heave type plugging pipelines instrument according to claim 2 with pressure relief, it is characterised in that：The fastener Including the second connecting sleeve (8), the second connecting sleeve (8) is penetrated in thread spindle (1) and vertically pacified in the second connecting sleeve (8) Equipped with the positioning panel (2), one is respectively equipped at the both ends of the second connecting sleeve (8) and tightens nut (7), it is described to tighten nut (7) it is threadedly coupled with thread spindle (1).

5. the air heave type plugging pipelines instrument according to claim 2 with pressure relief, it is characterised in that：In positioning panel (2) 3 support plates (11) have been at least connected between the second connecting sleeve (8), one end of each support plate (11) is fixed on positioning On panel (2), its other end is fixed in the second connecting sleeve (8).

6. the air heave type plugging pipelines instrument according to claim 1 with pressure relief, it is characterised in that：The pressure release knot Structure further includes pressure sensor, input button and controller, and the pressure sensor is mounted in thread spindle (1) and and controller Input terminal connection, it is described input button and controller input terminal connect, the control of the output terminal and relief valve of the controller The I/O interfaces of end connection processed and controller are connected with remote monitoring host computer by wireless communication module.