CN111998139A

CN111998139A - Wedge type pressure expansion type pipeline plugging device

Info

Publication number: CN111998139A
Application number: CN202010979094.7A
Authority: CN
Inventors: 应哲昕; 姚秦生; 任艳; 庄志娟
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-09-17
Filing date: 2020-09-17
Publication date: 2020-11-27

Abstract

The invention discloses a wedge-shaped pressure expansion type pipeline plugging device which comprises a plugging device arranged between a through hole (7) of a structure or a protection pipe and a pipeline (8), wherein the plugging device comprises at least one outer wedge block (1) and at least one inner wedge block (2), the at least one outer wedge block (1) and the at least one inner wedge block (2) are mutually spliced, and are extruded towards the middle through a locking connecting piece to generate opposite longitudinal displacement and generate radial opposite pressure expansion simultaneously, so that the outer wedge block and the inner wedge block are respectively extruded and sealed with the through hole (7) and the pipeline (8). The invention has simple structure, convenient installation and clear working principle. All parts are of solid structures, and the sealing device has the advantages of high mechanical strength, good durability, strong sealing and bearing capacity, reliable performance, large pressure expansion stroke and strong universality.

Description

Wedge type pressure expansion type pipeline plugging device

Technical Field

The invention relates to a plugging device, in particular to a wedge-shaped pressure expansion type pipeline plugging device.

Background

At present, the common modes of water-blocking and fireproof plugging of cables and pipelines through the perforation of structures or protective pipes include plastic mud plugging, air-filled bag plugging, extrusion double U-shaped rubber ring device plugging, laminated rubber ring plugging and the like, and although the cables and the pipelines have respective advantages, the cables and the pipelines still have more defects.

And (3) plastic mud plugging: the plugging performance is greatly influenced by the installation process, the mechanical strength is low, the plugging material is easy to deform and lose efficacy, the durability is poor, the service life is short, the plugging material can not be reused, and the plugging material is not environment-friendly.

Plugging an inflation bag: the installation needs special inflation equipment, and low destruction of mechanical strength became invalid easily, and the shutoff performance relies on gas pressure extrusion gap to realize, and the low shutoff effect of leakproofness is poor, and installation quality is difficult to control, and the durability is poor and the life is low.

And (3) extruding the double U-shaped rubber ring device for plugging: the device has the advantages of complex structure, low mechanical strength, easy damage and failure, low sealing degree, poor sealing effect and low durability and service life, and the sealing performance is realized by extruding a gap by a U-shaped rubber ring.

Plugging a laminated rubber ring: the device has the advantages of complex structure, small extrusion stroke of the sealing ring, complex installation process, difficult quality control and higher manufacturing cost.

Disclosure of Invention

The invention aims to solve the technical problem that the wedge-shaped pressure expansion type pipeline plugging device is simple in structure, convenient to install, safe to use, firm and durable, and effectively overcomes a plurality of defects in the prior art.

The invention is realized by the following technical scheme: a wedge-shaped pressure expansion type pipeline plugging device comprises a plugging device arranged between a perforation of a structure or a protection pipe and a pipeline, wherein the plugging device comprises at least one outer wedge block and at least one inner wedge block, the at least one outer wedge block and the at least one inner wedge block are mutually spliced and are extruded towards the middle through a locking connecting piece to generate opposite longitudinal displacement, and radial opposite pressure expansion is generated simultaneously, so that the outer wedge block and the inner wedge block are respectively sealed with the perforation and the pipeline in a compression mode.

As a preferred technical scheme, the inner wedge block and the outer wedge block are divided into two sections according to the circumferential geometric center, and the dividing surfaces are labyrinth-shaped sealing structures which are meshed with each other.

According to the preferable technical scheme, the locking connecting piece comprises a connecting piece, a connecting bolt and a nut, the connecting bolt penetrates through bolt holes formed in an inner wedge block and an outer wedge block respectively and extends out of the outer side of the through hole, the nut is locked at the extending end of the connecting bolt, the connecting piece is arranged on the outer side faces of two ends of the plugging device, and the connecting bolt penetrates through the connecting pieces at the two ends respectively.

As the preferred technical scheme, bolt wedges are further arranged between the inner side end of the connecting piece and the inner wedge block and between the inner wedge block and the outer wedge block, counter bores are formed in the inner wedge block and the outer wedge block, the bolt wedges are partially wedged into the counter bores, and the contact surfaces of the bolt wedges and the counter bores are conical surfaces in close contact.

As the preferred technical scheme, the outer plane of the bolt wedge block is slightly higher than the outer planes of the inner wedge block and the outer wedge block, a gap is reserved at the bottom of the counter bore, and the connecting bolt is in interference fit with the bolt wedge block.

As preferred technical scheme, be provided with the slot hole on the connecting piece, connecting bolt adopts half round head square neck bolt, and half round head square neck arranges in the perforation inboard, and the bolt square neck falls into the connecting piece slot hole, and the bolt is following the rotation when preventing the outside from screwing the nut.

As the preferred technical scheme, the contact surface between the inner wedge and the outer wedge is a close contact conical surface, and the splicing seams of the inner wedge and the outer wedge are arranged at an angle of 90 degrees.

As the preferred technical scheme, a spring is further arranged on the connecting bolt between the nut and the connecting piece, and the spring presses the inner wedge block and the outer wedge block all the time.

As the preferred technical scheme, the outer wall of the outer wedge block, the inner wall of the inner wedge block, the counter bores of the inner wedge block and the outer wedge block, and the inner wall and the outer wall of the bolt wedge block are all provided with annular grains.

As the preferred technical scheme, the inner wedge block, the outer wedge block and the bolt wedge block are all made of rubber materials, and the connecting sheet, the connecting bolt and the spring are all made of metal materials.

The invention has the beneficial effects that: the invention has simple structure, convenient installation and clear working principle. The pressure stroke is large, and the universality is strong. All parts are of solid structures, and the sealing plug is high in mechanical strength, good in durability, strong in plugging and bearing capacity and reliable in performance.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

Fig. 1 is an internal sectional view of embodiment 1 of the present invention;

FIG. 2 is a schematic end view of example 1 of the present invention;

FIG. 3 is a sectional view of the inside of embodiment 2 of the present invention;

FIG. 4 is a first schematic view of the inner and outer wedge mating surfaces of the present invention;

FIG. 5 is a second schematic view of the inner and outer wedge mating surfaces of the present invention;

FIG. 6 is a third schematic view of the inner and outer wedge mating surfaces of the present invention.

Detailed Description

All of the features disclosed in this specification, or all of the steps in any method or process so disclosed, may be combined in any combination, except combinations of features and/or steps that are mutually exclusive.

Any feature disclosed in this specification (including any accompanying claims, abstract and drawings), may be replaced by alternative features serving equivalent or similar purposes, unless expressly stated otherwise. That is, unless expressly stated otherwise, each feature is only an example of a generic series of equivalent or similar features.

In the description of the present invention, it is to be understood that the terms "inner", "outer", "upper", "lower", "middle", "end", "longitudinal", "radial", "circumferential", "between", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are used merely for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention.

Further, in the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

The use of terms such as "upper," "above," "lower," "below," and the like in describing relative spatial positions herein is for the purpose of facilitating description to describe one element or feature's relationship to another element or feature as illustrated in the figures. The spatially relative positional terms may be intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "below" or "beneath" other elements or features would then be oriented "above" the other elements or features. Thus, the exemplary term "below" can encompass both an orientation of above and below. The device may be otherwise oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly

In the present invention, unless otherwise specifically stated or limited, the terms "wedge", "press", "expand", "close", "connect", "splice", "pass-through", and the like are to be construed broadly, e.g., as a fixed connection, a detachable connection, or an integral part; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

Example 1

As shown in fig. 1 and 2, the wedge type pressure expansion pipeline plugging device of the invention comprises a plugging device installed in an inner hole 7 of a structure, wherein a cable or a pipeline 8 passes through the plugging device, the plugging device comprises at least one outer wedge block 1 and at least one inner wedge block 2, the at least one outer wedge block 1 and the at least one inner wedge block 2 are spliced with each other and are pressed towards the middle through a locking connecting piece to generate opposite longitudinal displacement, and radial pressure expansion is generated at the same time, so that the inner wedge block and the outer wedge block are respectively pressed and sealed with the through hole 7 and the pipeline 8. .

In this embodiment, the inner and outer wedges are divided into two halves along the circumferential geometric center, the division line splicing surfaces are in the shape of a mutually meshed rectangle or trapezoid, but not limited thereto, and a mutually meshed labyrinth-shaped sealing structure can be formed, and the inner wedge splicing surfaces may also be in the shape of a helical tooth, but not limited thereto, and an elastic sealing structure can be formed, and the other half is a plane, as shown in fig. 4 to 6.

In this embodiment, the locking connector includes a connecting piece 3, a connecting bolt 4 and a nut, the connecting bolt 4 respectively penetrates through bolt holes formed in the inner wedge 2 and the outer wedge 1, and extends out of the structure, the end of the connecting bolt extends out of the structure and locks the nut, the connecting piece 3 is arranged on the outer side surfaces of two ends of the plugging device, and the connecting bolt 4 respectively penetrates through the connecting pieces 3 at the two ends.

In this embodiment, bolt wedges 6 are further disposed between the inner side end of the connecting sheet 3 and the inner wedge and the outer wedge, counter bores are disposed on the inner wedge 2 and the outer wedge 1, the bolt wedges 6 are partially wedged into the counter bores, and contact surfaces of the bolt wedges 6 and the counter bores are conical surfaces in close contact.

In the embodiment, the outer plane of the bolt wedge 6 is slightly higher than the outer planes of the inner wedge and the outer wedge, a gap is reserved at the bottom of the counter bore, the matching size of the gap and the gap is determined by the sufficient tightness generated after the bolt wedge is pressed in, and the connecting bolt 4 and the bolt wedge 6 are in interference fit.

In this embodiment, be provided with the slot hole on the connection piece 3, connecting bolt 4 adopts half round head square neck bolt, and half round head square neck arranges in the slot hole inboard, and the bolt square neck falls into 3 slot holes of connection piece, and the bolt follows the rotation when preventing the outside nut of screwing, and when the voussoir compressed tightly the production creep that extends, connecting bolt had suitable degree of freedom in the connection piece slot hole.

In this embodiment, the contact surface between the inner wedge and the outer wedge is a tightly contacted conical surface, and the splicing seams of the inner wedge 2 and the outer wedge 1 are arranged at 90 degrees.

In this embodiment, a spring 5 is further arranged on the connecting bolt between the nut and the connecting piece 3, the inner wedge block 2 and the outer wedge block 1 are always pressed by the spring 5, and constant pressure can be applied in the rubber aging and gradually losing elasticity process.

In this embodiment, the outer wall of the outer wedge 1, the inner wall of the inner wedge 2, the counter bores of the inner and outer wedges, and the inner and outer walls of the bolt wedge 6 are all provided with annular grains to increase friction and improve sealing performance.

In this embodiment, the inner wedge 2, the outer wedge 1, and the bolt wedge 6 are made of rubber having excellent basic properties such as elasticity, ductility, corrosion resistance, flame retardancy, durability, and mechanical strength, and the connection piece 3, the connection bolt 4, and the spring 5 are made of metal having excellent corrosion resistance and mechanical strength.

Example 2

As shown in FIG. 3, the outer wedge of the device can be designed into a square shape according to the shape of the through hole, the outer wedge of the square structure is divided into four pieces according to the circumferential longitudinal and transverse geometric centers, and other designs are the same.

For plugging with high sealing requirement and large bearing pressure, a back-to-back series connection mode can be adopted, the plugging performance and the bearing capacity can be enhanced by times, and the working principle is the same.

According to the invention, by screwing the connecting screw and the connecting nut, the front connecting sheet and the rear connecting sheet generate inward uniform extrusion forces to act on the inner wedge block and the outer wedge block simultaneously, the two layers of wedge blocks generate inward longitudinal displacement, and the inner wedge block and the outer wedge block simultaneously generate radial opposite radial slippage under the action of the wedge bodies with the conical contact surfaces, namely the outer wedge block expands outwards, the inner wedge block compresses inwards until the inner wedge block and the outer wedge block extrude to the outer wall of the pipeline and the inner wall of the through hole, and the splicing seam of the outer wedge block can expand greatly in the process. And the connecting screw and the connecting nut are continuously screwed, and the outer wedge block generates annular extension creep deformation under the extrusion action of the wedge block, so that the splicing seam is reduced. When the inner wedge and the outer wedge generate the radial action, the splicing surfaces are pressed and sealed by the mutually meshed labyrinth-shaped splicing surfaces under the action of longitudinal pressure. In the process of screwing the connecting screw and the connecting nut, the bolt wedge block is wedged into the counter bore under the pressure action of the connecting plate, so that the wedge blocks and the wedge block and the bolt are sealed in a pressed mode. Thereby realizing the integral sealing of the outer wall of the pipeline and the inner wall of the perforation.

The above description is only an embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that are not thought of through the inventive work should be included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope defined by the claims.

Claims

1. The utility model provides a wedge type pressure expansion formula pipeline plugging device which characterized in that: the plugging device comprises at least one outer wedge block (1) and at least one inner wedge block (2), wherein the at least one outer wedge block (1) and the at least one inner wedge block (2) are mutually spliced and are extruded towards the middle through a locking connecting piece to generate opposite longitudinal displacement and generate radial opposite compression, so that the outer wedge block and the inner wedge block are respectively extruded and sealed with the through hole (7) and the pipeline (8).

2. The wedge-type collapsible pipeline plugging device of claim 1, wherein: the inner wedge block and the outer wedge block are divided into two sections according to the circular geometric center, and the dividing surfaces are labyrinth-shaped sealing structures which are meshed with each other.

3. The wedge-type collapsible pipeline plugging device of claim 1, wherein: the locking connecting piece comprises connecting pieces (3), connecting bolts (4) and nuts, the connecting bolts (4) penetrate through bolt holes formed in the inner wedge blocks (2) and the outer wedge blocks (1) respectively and extend out of the outer side of the through holes, the nuts are locked by the extending ends of the connecting bolts, the connecting pieces (3) are arranged on the outer side faces of the two ends of the plugging device, and the connecting bolts (4) penetrate through the connecting pieces (3) at the two ends respectively.

4. The wedge-type collapsible pipeline plugging device of claim 3, wherein: bolt wedge blocks (6) are arranged between the inner side end of the connecting piece (3) and the inner wedge block and between the inner wedge block and the outer wedge block, counter bores are formed in the inner wedge block (2) and the outer wedge block (1), the bolt wedge blocks (6) are partially wedged into the counter bores, and the contact surfaces of the bolt wedge blocks (6) and the counter bores are conical surfaces in tight contact.

5. The wedge-type collapsible pipeline plugging device of claim 4, wherein: the outer plane of the bolt wedge block (6) is slightly higher than the outer planes of the inner wedge block and the outer wedge block, a gap is reserved at the bottom of the counter bore, and the connecting bolt (4) is in interference fit with the bolt wedge block (6).

6. The wedge-type collapsible pipeline plugging device of claim 3, wherein: be provided with the slot hole on connection piece (3), connecting bolt (4) adopt half round head square neck bolt, and half round head square neck arranges in the perforation inboard, and the bolt square neck falls into connection piece (3) slot hole, and the bolt is following the rotation when preventing the outside screw nut.

7. The wedge-type collapsible pipeline plugging device of claim 1, wherein: the contact surface between the inner wedge block and the outer wedge block is a close contact conical surface, and the splicing seams of the inner wedge block (2) and the outer wedge block (1) are arranged at an angle of 90 degrees.

8. The wedge-type collapsible pipeline plugging device of claim 3, wherein: and a spring (5) is also arranged on the connecting bolt between the nut and the connecting sheet (3), and the inner wedge block (2) and the outer wedge block (1) are always pressed by the spring (5).

9. The wedge-type collapsible pipeline plugging device of claim 1, wherein: the outer wall of the outer wedge block (1), the inner wall of the inner wedge block (2), the counter bores of the inner wedge block and the outer wedge block, and the inner wall and the outer wall of the bolt wedge block (6) are all provided with annular grains.

10. The wedge-type collapsible pipeline plugging device of claim 1, wherein: the inner wedge block (2), the outer wedge block (1) and the bolt wedge block (6) are all made of rubber materials, and the connecting piece (3), the connecting bolt (4) and the spring (5) are all made of metal materials in a machining mode.