CN106764238A - A kind of self-locking pipeline port is met an urgent need plugging device - Google Patents

Abstract

The invention discloses a self-locking emergency sealing device for pipeline ports, which includes a sealing component, a pull screw component and a frictional self-locking component. At least one annular air bag is arranged in the inner cavity of the blocking assembly, and the broken and broken pipeline can pass through the inner ring of the annular air bag. It includes several sets of first semicircular fixtures and second semicircular fixtures, each set of first semicircular fixtures and second semicircular fixtures can be butted to form a clasp to hold tightly on the ruptured and broken pipeline, and the clasp is connected to the seal by pulling the screw assembly. One end of the plugging component is fixedly connected, and the other end of the plugging component is connected to a valve or a sealing plate. The invention has the advantages of simple structure, good plugging effect, no falling off of the plugging device, and safety and reliability.

Description

A self-locking emergency plugging device for pipeline ports

technical field

The invention belongs to the technical field of pipeline engineering, and in particular relates to a self-locking emergency plugging device for pipeline ports.

Background technique

With the development and expansion of the scale of chemical production, the pressure of reaction equipment, storage equipment and pipelines continues to increase, and leakage accidents occur from time to time, causing casualties, environmental pollution and energy waste. Therefore, the emergency plugging of reaction equipment, storage equipment and pipelines It has become a very important link in the process of modern petrochemical production, storage and transportation, and there is an urgent need for fast, effective and safe plugging equipment to carry out plugging operations on accident pipelines, so as to effectively control the source of danger and minimize its leakage The resulting casualties and environmental pollution and energy waste.

Foreign plugging and emergency repair technology developed earlier, but with social development and technological progress, many professional pipeline plugging companies in my country have emerged as the times require, reaching the international advanced level. There is still a large gap in technologies such as plugging, emergency repair of pipeline breaks, and emergency repair of special media.

Contents of the invention

The technical problem to be solved by the present invention is to provide a self-locking emergency sealing device for pipeline ports with simple structure, good sealing effect, no falling off of the sealing device, and safety and reliability. The invention mainly aims at the rupture and fracture of dangerous medium pipelines caused by natural disasters or human errors in the construction process, and performs emergency sealing or diversion treatment to prevent large-area leakage of the medium.

For realizing above-mentioned technical purpose, the technical scheme that the present invention takes is:

A self-locking emergency plugging device for pipeline ports, which includes a plugging component, a pull screw component and a frictional self-locking component. There is at least one annular air bag in the cavity, and the broken pipe can pass through the inner ring of the annular air bag. The semicircle fixture and the second semicircle fixture, each set of the first semicircle fixture and the second semicircle fixture can be butted to form a clasp to hold tightly on the broken and broken pipeline, and the clasp is pulled through one end of the screw assembly and the plugging assembly Fixed connection, the other end of the plugging component is connected to a valve or a sealing plate.

In order to optimize the above technical solutions, the specific measures taken also include:

One end of the above-mentioned first semicircle fixture and one end of the second semicircle fixture are hinged through a hinge, and the other end of the first semicircle fixture and the other end of the second semicircle fixture are provided with connecting flanges, and the two connecting flanges The first semicircle fixture and the second semicircle fixture are fixedly connected by interlocking bolts.

The aforementioned tension screw assembly includes the same number of tension screws as the number of snap rings, and the central axis of each tension screw is parallel to the central axis of the pipeline.

Each of the aforementioned snap rings is provided with a tension screw mounting bracket, and a fixed flange is fixed at one end of the plugging assembly and the snap ring. After the flange is fixed, it is locked with the fixed flange by the flange nut.

The inner wall of the blocking component is provided with annular grooves having the same number as the annular airbags. After the annular airbags are inflated, the outer ring of the annular airbags is attached to the annular grooves.

There are three annular air bags mentioned above, which are arranged at intervals in the axial direction in the blocking assembly, and correspondingly, there are three annular grooves.

The above-mentioned friction self-locking assembly includes three snap rings arranged at intervals in the axial direction, correspondingly, there are three tension screws, and the tension screws cooperate with each other in an equal arc.

An extended flange is provided on the end of the blocking assembly facing away from the friction self-locking assembly, and the blocking assembly is connected to a valve or a sealing plate through the extended flange.

The clasp of the friction self-locking assembly of the present invention is fixed on the outer surface of the pipeline by two semicircular clamps using bolts, and a central axis parallel to the central axis of the pipeline is arranged on the clasp, and a mounting hole connected with the tension screw is provided on the clasp. . When the pulling screw passes through the installation hole on the snap ring to apply a load in the direction of the pipeline axis, the snap ring will have a tendency to rotate around the direction perpendicular to the pipeline axis, and the axial load of the pulling screw will be converted into a pair of snap rings against the outside of the pipe. The pressure on the surface forms a frictional self-lock to prevent the snap ring from sliding along the pipe surface. The sealing assembly is composed of a casing and an annular airbag. Three annular airbags are installed inside the casing in turn (there is a certain distance between the airbags). After the annular airbag is inflated, the inner ring of the annular airbag is tightly sealed with the ruptured pipe, and the outer ring is tightly attached to the inner surface of the shell, so that the inner surface of the shell and the outer surface of the pipe are formed. The space is sealed and separated, and the leaked liquid can be intercepted to prevent the medium from flowing out; the inner wall of the sealing component is provided with an annular groove, so that the airbag can be fixed more firmly and can withstand higher pressure. The housing is provided with two mounting flanges at the front and rear, which are respectively connected with the tension screw of the annular friction self-locking mechanism and the diversion pipe or the blocked blind plate or valve. When the dangerous source medium pipeline needs to be blocked or diverted, first connect the plugging component to the diversion pipe or the blind plate or valve to be blocked, and install the ring-shaped friction self-locking mechanism on the pipeline; then install the Pull the screw to fix the whole device on the broken pipe. Finally, inflate the air bag to make the sealing component hold the broken pipe tightly, close the valve installed on the expansion flange to complete the sealing, or reverse the flow of the medium through the diversion pipe .

Advantage and positive effect of the present invention:

(1) The installation speed of this device is fast, and it can perform emergency sealing or diversion treatment for the rupture and fracture of the fluid medium pipeline caused by natural disasters or human errors during the construction process to prevent large-scale leakage of the medium.

(2) This device adopts a combined annular friction self-locking mechanism to install the plugging component at the opening of the fixed pipe end, and it will not fall off during the plugging process of the high-pressure pipe, which is safe and reliable.

(3) The plugging component uses its internal multi-layer sealing air bag to hold the pipeline tightly, and forms a throttling cavity in the annular space formed by the outer wall of the pipeline and the sealing component to adapt to the sealing of high-pressure pipelines.

(4) The end of the shell is equipped with a standard flange expansion interface, which is connected with a valve or a diversion pipe to block or divert the fluid inside the pipe.

Description of drawings

Figure 1 is a first schematic diagram of the overall combined state of the present invention.

Fig. 2 is a second schematic diagram of the overall assembled state of the present invention.

Fig. 3 is a first schematic diagram of the combined state of the friction self-locking assembly and the tension screw of the present invention.

Fig. 4 is a second schematic diagram of the combined state of the friction self-locking assembly and the tension screw of the present invention.

Fig. 5 is a schematic structural diagram of the blocking assembly of the present invention.

Fig. 6 is a cross-sectional view of the blocking assembly of the present invention.

Figure 7 is a schematic diagram of the annular airbag of the present invention;

Fig. 8 is a sectional view of the annular airbag of the present invention.

In the figure: 1 is the plugging component, 2 is the tie rod screw component, 3 is the friction self-locking component, 4 is the tension screw, 5 is the tension screw mounting bracket, 6 is the first semicircle clamp, 7 is the hinge, 8 is the pull rod nut , 9 is a bolt, 10 is a connecting flange, 11 is a second semicircular fixture, 12 is an expansion flange, 13 is an annular air bag, 14 is an air inlet passage, and 15 is a fixed flange.

detailed description

Embodiments of the present invention will be further described in detail below in conjunction with the accompanying drawings.

Embodiment 1: When the hazardous source medium pipeline needs to be port blocked or diverted, the specific process of assembling the plugging component is as follows: Assemble the self-locking anti-off snap ring device, connect the first semicircular clamp 6 and the second semicircular clamp 11 through the hinge 7 to form a complete circumferential pipeline clamp, that is, the friction self-locking component 3; install the tension screw 4 through the tension screw The mounting holes of the bracket 5 are installed as shown in Figure 3, forming a self-locking anti-off snap ring device. Assembling the sealing assembly 1 Install the annular airbags 13 (three in total) on the steel casing at one time to form the sealing assembly. Assembled as a whole, the friction self-locking assembly 3 is connected and fixed to the fixing flange 15 of the sealing assembly 1 through three tension screws 4 and tension nuts 8 with different lengths. Connect the expansion flange 12 with the corresponding diversion pipe and valve, so that it has the function of diversion and sealing.

(1) Diversion working condition 1: When the fluid medium pipeline needs to be reversed, the implementation steps are as follows: Open three friction self-locking components 2 (formed by connecting the first semicircle fixture 6 and the second semicircle fixture 11 through the hinge 7) through the connecting flange 10 on the first semicircle fixture 6 and the second semicircle fixture 11 Utilize the bolt 9 to be fixed on the outer pipe wall near the nozzle of the ruptured and fractured pipeline, and install the integral device that has been installed previously at the nozzle of the pipeline that needs to be diverted; after the three annular airbags 13 of the sealing assembly 1 are inflated Can fully contact with the outer tube wall. The three annular airbags 13 are inflated sequentially through the compressor, so that they expand under the gas pressure and hug the outer wall of the pipeline to achieve sealing (a throttling cavity is formed in the annular space formed by the outer wall of the pipeline and the sealing assembly 1 to adapt to the environment with higher pressure. Pipeline plugging), at this time, the hydraulic medium with higher pressure is diverted through the diversion pipe connected to the expansion flange 12 .

(2) Diversion working condition 2: Steps when the fluid medium pipeline needs to be blocked: the installation process of the device is the same as that of the diversion working condition, the difference is that the expansion flange 12 is connected to a blind plate or a valve and a pipeline . When it is a blind plate, the three annular airbags 13 are directly inflated sequentially through the compressor pipeline, so that they expand under the gas pressure and hug the outer wall of the pipeline to complete the sealing and sealing. When the expansion flange 12 is connected to the valve and the diversion pipe; firstly, the valve is opened for installation (the installation process of the device is the same as the diversion condition, which can greatly reduce the fluid resistance of the equipment installation, especially the fast-flowing fluid during the flow process. installation), and then inflate the three annular airbags 13 sequentially through the compressor pipeline, so that they expand under the gas pressure and hug the outer wall of the pipeline to achieve sealing. Implement diversion processing. Finally, the valve is slowly closed to achieve plugging.

The installation speed of the device is fast, and it can perform emergency sealing or diversion treatment for the rupture and fracture of the fluid medium pipeline caused by natural disasters or human errors in the construction process to prevent large-scale leakage of the medium. The combined annular friction self-locking mechanism 3 is used to install and fix the plugging component 1 at the opening of the end of the pipeline, so that it will not fall off during the sealing process of the pipeline with high pressure, and is safe and reliable. The sealing assembly 1 uses its internal multi-layer sealing air bag 13 to hold the pipeline tightly, and forms a throttling cavity in the annular space that can be formed by the outer wall of the pipeline and the sealing assembly 1 to adapt to the sealing of pipelines with high pressure; the shell end There is a standard flange expansion interface 12 on the inside, which is connected with a valve or a diversion pipe to block or divert the fluid inside the pipe.

The above are only preferred implementations of the present invention, and the protection scope of the present invention is not limited to the above-mentioned embodiments, and all technical solutions under the idea of the present invention belong to the protection scope of the present invention. It should be pointed out that for those skilled in the art, some improvements and modifications without departing from the principle of the present invention should be regarded as the protection scope of the present invention.

Claims (8)

1. the emergent plugging device in a kind of self-locking pipeline port, it is characterized in that：Including blocking component (1), Screw arbor with nut at both-ends component (2) With friction self-locking component (3), described blocking component (1) is a body that can be enclosed within outside fracture pipeline, described closure At least one ring-shaped gasbag (13) is provided with the inner chamber of component (1), fracture pipeline can be from the inner ring of ring-shaped gasbag (13) In pass through, described ring-shaped gasbag (13) is connected with one and extend out to blocking component (1) inlet channel (14) outward, described friction Include some groups of the first semicircle fixtures (6) and the second semicircle fixture (11), the first semicircle fixture described in every group from lock set (3) (6) can be butted into snap ring and hold tightly on fracture pipeline with the second semicircle fixture (11), described snap ring is by drawing spiral shell Bar assembly (2) is fixedly connected with one end of blocking component (1), the other end connecting valve or shrouding of described blocking component (1).

2. the emergent plugging device in a kind of self-locking pipeline port according to claim 1, it is characterized in that：Described the first half One end of circle fixture (6) and one end of the second semicircle fixture (11) are hinged by hinge (7), the first described semicircle fixture (6) The other end and the other end of the second semicircle fixture (11) be provided with adpting flange (10), two adpting flanges (10) are by spiral shell Bolt (9) interlocking is fixed, and the first semicircle fixture (6) is fixedly connected with the second semicircle fixture (11).

3. the emergent plugging device in a kind of self-locking pipeline port according to claim 2, it is characterized in that：It is described to drawing spiral shell Bar assembly (2) includes quantity and snap ring quantity identical pulling force screw rod (4), the central axis of the pulling force screw rod (4) described in each It is parallel with central axis.

4. the emergent plugging device in a kind of self-locking pipeline port according to claim 3, it is characterized in that：Card described in each Pulling force screw rod mounting bracket (5) is provided with ring, one end that described blocking component (1) is docked with snap ring is fixed with fixation Flange (15), pulling force screw rod (4) one end is fixedly connected with corresponding pulling force screw rod mounting bracket (5) by pull-rod nut (8), separately After one end passes through mounting flange (15), locked by flange nut and mounting flange (15).

5. the emergent plugging device in a kind of self-locking pipeline port according to claim 4, it is characterized in that：Described closure group Quantity and ring-shaped gasbag (13) quantity identical endless groove, described ring-shaped gasbag (13) inflation are provided with the inwall of part (1) Afterwards, the outer portion of ring-shaped gasbag (13) is affixed in endless groove.

6. the emergent plugging device in a kind of self-locking pipeline port according to claim 5, it is characterized in that：Described ring-type gas Capsule (13) has three, and axially spaced-apart is arranged in blocking component (1), and correspondingly, described endless groove has three roads.

7. the emergent plugging device in a kind of self-locking pipeline port according to claim 6, it is characterized in that：Described friction is certainly The snap ring that lock set (3) is arranged including three axially spaced-aparts, correspondingly, pulling force screw rod (4) has three, between pulling force screw rod (4) Coordinate Deng radian.

8. the emergent plugging device in a kind of self-locking pipeline port according to claim 7, it is characterized in that：Described closure group Part (1) is provided with extension flange (12) back to one end of friction self-locking component (3), and described blocking component (1) is by development method Blue (12) connecting valve or shrouding.