CN219041364U

CN219041364U - Sealing structure for preventing plastic from expanding and retracting

Info

Publication number: CN219041364U
Application number: CN202222958946.1U
Authority: CN
Inventors: 李绍斌; 彭勇; 唐文博; 周海; 扶正夫; 鲁元飞; 文霞; 杨梦军
Original assignee: Changlan Cable Accessories Co Ltd
Current assignee: Long Cable Technology Group Co ltd
Priority date: 2022-11-07
Filing date: 2022-11-07
Publication date: 2023-05-16
Anticipated expiration: 2032-11-07

Abstract

The utility model discloses a sealing structure for preventing plastic from expanding and retracting, which relates to the technical field, and comprises the following components: the pipeline connecting device comprises an adapter ring, a sealing cover, a sealing ring, an elastic assembly and a plurality of tightening screws, wherein the adapter ring is detachably connected to a flange at the end part of a pipeline; the outer peripheral wall of the sealing cover is fixedly connected with the inner wall of the adapter ring, the sealing cover is a hollow cone extending towards the inside of the pipeline, and the center of the sealing cover is provided with a center hole for the cable to pass through; the sealing ring is sleeved on the cable and is used for sealing a gap between the cable and the sealing cover; the elastic component is sleeved on the cable, and can drive the sealing ring to move in the direction of narrowing the sealing cover and enable the sealing ring to always seal a gap between the cable and the sealing cover; one end of the tightening screw is connected to the adapter ring, the other end of the tightening screw is movably connected to the elastic component, and the tightening screw is used for adjusting the pressing force of the elastic component to the sealing ring. The utility model can prevent the sealing failure caused by the expansion and retraction of the plastic.

Description

Sealing structure for preventing plastic from expanding and retracting

Technical Field

The utility model relates to the technical field, in particular to a sealing structure for preventing plastic from expanding and retracting.

Background

With the remarkable development trend of the cable application of urban power transmission and distribution lines, the sleeve terminal has a large number of applications in the power transmission line of the cable (100), and the medium-low voltage crosslinked polyethylene cable occupies a large proportion in power systems and electrical engineering by virtue of excellent mechanical property, insulating property and simple processing technology, and the corresponding terminal product utilization rate also occupies a large proportion. Because the sleeve terminal is generally assembled on site, the site installation environment is complex and changeable, the overall quality of the sleeve terminal is easily influenced by various factors such as installation conditions, technology, materials, quality of installation personnel and the like, and meanwhile, the sleeve terminal is exposed to the windy and sunny environment, the plastic sealing component is easily expanded and retracted, and the plastic sealing component is aged even along with the increase of the running time, so that the sealing failure is caused.

Disclosure of Invention

The present utility model aims to solve at least one of the technical problems existing in the prior art. Therefore, the utility model provides a sealing structure for preventing plastic from expanding and retracting, which can prevent the sealing failure caused by the plastic expansion and retraction.

According to an embodiment of the first aspect of the present utility model, a sealing structure for preventing expansion and retraction of plastic for sealing a gap between a cable and a conduit into which the cable is inserted, includes: the pipeline sealing device comprises an adapter ring, a sealing cover, a sealing ring, an elastic assembly and a plurality of tightening screws, wherein the adapter ring is detachably connected to a flange at the end part of the pipeline; the outer peripheral wall of the sealing cover is fixedly connected with the inner wall of the adapter ring, the sealing cover is a hollow cone extending towards the inside of the pipeline, and a central hole for the cable to pass through is formed in the center of the sealing cover; the sealing ring is sleeved on the cable and is used for sealing a gap between the cable and the sealing cover; the elastic component is sleeved on the cable, and can drive the sealing ring to move in the direction of narrowing the sealing cover, so that the sealing ring can always seal a gap between the cable and the sealing cover; one end of the tightening screw is connected to the adapter ring, the other end of the tightening screw is movably connected to the elastic component, and the tightening screw is used for adjusting the pressing force of the elastic component to the sealing ring.

According to the embodiment of the utility model, the sealing structure for preventing plastic from expanding and retracting has at least the following beneficial effects: due to the elastic force of the elastic component, even if the sealing ring retracts and expands due to the factors of environment, service time and the like, the elastic force of the elastic component is enough to compress the sealing ring, so that the compressing force of the spring on the surface of the cable and the inner surface of the sealing cover is ensured, and faults caused by sealing failure are prevented.

According to some embodiments of the present utility model, the elastic component includes a support ring, a plurality of guide studs, a plurality of springs, and a backing plate ring, where one end of the support ring away from the seal ring is provided with a plurality of first bolt holes, the plurality of guide studs are respectively screwed in the corresponding first bolt holes, the springs are sleeved on the guide studs, one ends of the springs are abutted against the support ring, the other ends of the springs are abutted against the backing plate ring, the backing plate ring is provided with a plurality of first adjustment holes with dimensions matching with the guide studs, the plurality of first adjustment holes are respectively used for the corresponding guide studs to pass through at one end of the support ring away from the backing plate ring, and the tightening screw can adjust the distance between the backing plate ring and the adapter ring.

According to some embodiments of the present utility model, the backing plate ring is provided with a plurality of second adjusting holes, the second adjusting holes are located at the outer sides of the first adjusting holes, one end of the adapting ring, which is far away from the flange, is provided with a plurality of second bolt holes, one ends of the tightening screws are in threaded connection with the corresponding second bolt holes, the other ends of the tightening screws pass through the corresponding second adjusting holes, tightening nuts are in threaded connection with the tightening screws, and the tightening nuts are used for propping against one side, which is far away from the adapting ring, of the backing plate ring to adjust the distance between the backing plate ring and the adapting ring.

According to some embodiments of the present utility model, a plurality of third bolt holes are provided at one end of the support ring away from the seal ring, a plurality of third adjustment holes are provided on the backing plate ring, a stud is screwed in the third bolt holes, one end of the stud away from the support ring passes through the third adjustment holes, a limit nut is sleeved on the stud, the limit nut is used to prop against one end of the backing plate ring away from the support ring, and the limit nut can prevent the stud from being separated from the third adjustment holes.

According to some embodiments of the utility model, the stud is mounted in spaced relation to the guide stud.

According to some embodiments of the utility model, a sealing ring is clamped between the adapter ring and the flange.

According to some embodiments of the utility model, a protective cover is connected to a side of the adapter ring away from the flange, and the elastic component is located in the protective cover.

According to some embodiments of the utility model, an insulating waterproof cement is filled between the protective cover and the cable.

According to some embodiments of the utility model, the conduit is impregnated with an insulating agent.

According to the embodiment of the utility model, the sealing structure for preventing plastic from expanding and retracting has at least the following beneficial effects: by using

(1) Under the condition that the sealing ring is contracted or expanded, the elastic force of the spring is changed, and the sealing ring can still provide durable and stable pressing force to prevent sealing failure;

(2) The related performance of the sealing ring and the sealing cover material can still be kept stable after being soaked in the insulating agent for a long time;

(3) The pressing force of the elastic component to the sealing ring can be flexibly adjusted according to the use condition.

Additional aspects and advantages of the utility model will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the utility model.

Drawings

The utility model is further described with reference to the accompanying drawings and examples, in which:

FIG. 1 is a schematic illustration in semi-section of one embodiment of the present utility model;

FIG. 2 is an enlarged view of FIG. 1 at A;

FIG. 3 is an enlarged view of FIG. 1 at B;

FIG. 4 is a schematic view of a seal housing according to an embodiment of the present utility model;

FIG. 5 is a schematic view of a carrier ring according to an embodiment of the present utility model;

FIG. 6 is a schematic view of a guide stud according to one embodiment of the present utility model;

FIG. 7 is a schematic view of a backing plate ring according to one embodiment of the present utility model;

FIG. 8 is a schematic view of an elastic assembly according to an embodiment of the present utility model;

FIG. 9 is a schematic diagram of a stud according to one embodiment of the present utility model;

fig. 10 is a schematic view of a tightening screw according to an embodiment of the utility model.

Reference numerals:

a cable 100;

a pipe 200, an outer pressure ring 201 and a flange 210;

an adapter ring 300, a second bolt hole 310;

a seal cap 400, a central bore 401;

a seal ring 500;

the spring assembly 600, the carrier ring 610, the first bolt hole 611, the third bolt hole 612, the stud 613, the stop nut 614, the guide stud 620, the plurality of springs 630, the backing plate ring 640, the first adjustment hole 641, the second adjustment hole 642, the third adjustment hole 643;

tightening screw 700 and tightening nut 710;

a boot 800;

insulating waterproof cement 900.

Detailed Description

Embodiments of the present utility model are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative only and are not to be construed as limiting the utility model.

In the description of the present utility model, it should be understood that the direction or positional relationship indicated with respect to the description of the orientation, such as up, down, etc., is based on the direction or positional relationship shown in the drawings, is merely for convenience of describing the present utility model and simplifying the description, and does not indicate or imply that the apparatus or element 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 utility model.

In the description of the present utility model, plural means two or more. The description of the first and second is for the purpose of distinguishing between technical features only and should not be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.

In the description of the present utility model, unless explicitly defined otherwise, terms such as arrangement, installation, connection, etc. should be construed broadly and the specific meaning of the terms in the present utility model can be reasonably determined by a person skilled in the art in combination with the specific contents of the technical scheme.

Referring to fig. 1 to 10, a sealing structure for preventing expansion and retraction of plastic for sealing a gap between a cable 100 and a duct 200 in which the cable 100 is inserted according to an embodiment of the present utility model includes: adapter ring 300, seal cap 400, seal ring 500, elastic assembly 600, and plurality of tightening screws 700. The flange 210 at the end part of the pipeline 200 is connected with the outer pressure ring 201 through bolts, the adapter ring 300 is partially clamped between the flange 210 and the outer pressure ring 201, the adapter ring 300 is connected with the outer pressure ring 201 through bolts, the outer peripheral wall of the sealing cover 400 is welded with the inner wall of the adapter ring 300 to ensure structural strength and tightness, the sealing cover 400 is a hollow cone extending towards the interior of the pipeline 200, and the center of the sealing cover 400 is provided with a center hole 401 for the cable 100 to penetrate through; the sealing ring 500 is made of ethylene propylene diene monomer rubber, the sealing ring 500 is sleeved on the cable 100, and the inner surface of the sealing ring 500 is matched with the cable 100 in size, so that the sealing ring 500 can simultaneously prop against the cable 100 and the sealing cover 400. The outer surface of the sealing ring 500 is cone-shaped and is attached to the inner surface of the sealing cover 400, and the sealing ring 500 is used for sealing a gap between the cable 100 and the sealing cover 400; the elastic component 600 is sleeved on the cable 100, and the elastic component 600 can drive the sealing ring 500 to move in the direction of narrowing the sealing cover 400, so that the sealing ring 500 can always seal a gap between the cable 100 and the sealing cover 400; due to the elastic force of the elastic component 600, even if the sealing ring 500 retracts and expands due to environmental factors, service time factors and the like, the elastic force of the elastic component 600 is enough to compress the sealing ring 500, so that the compression force of the spring 630 on the surface of the cable 100 and the inner surface of the sealing cover 400 is ensured, and the failure caused by the sealing failure is prevented. One end of the tightening screw 700 is connected to the adapter ring 300, the other end is movably connected to the elastic assembly 600, and the tightening screw 700 is used for adjusting the pressing force of the elastic assembly 600 on the sealing ring 500. The pressing force of the elastic assembly 600 can be flexibly adjusted according to the use condition.

Referring to fig. 1 to 10, it can be understood that the elastic assembly 600 includes a support ring 610, a plurality of guide studs 620, a plurality of springs 630, and a backing plate ring 640, wherein a plurality of first bolt holes 611 are symmetrically formed around one end of the support ring 610 away from the seal ring 500, the plurality of guide studs 620 are respectively in threaded connection with the corresponding first bolt holes 611, the springs 630 are sleeved on the guide studs 620, one end of each spring 630 abuts against the support ring 610, the other end abuts against the backing plate ring 640, the backing plate ring 640 is made of copper, the backing plate ring 640 is provided with a plurality of first adjusting holes 641 with a size matched with the guide studs 620, the plurality of first adjusting holes 641 are respectively provided for the corresponding guide studs 620 to pass through at one end away from the support ring 610, the tightening screw 700 can adjust the distance between the backing plate ring 640 and the adapter ring 300, and when the tightening screw 700 drives the backing plate ring 640 to approach the adapter ring 300, the backing plate ring 640 compresses the springs 630 smoothly under the action of the guide studs 620, so that the compression force of the support ring 610 on the seal ring 500 is increased.

Referring to fig. 1 to 10, it may be understood that the shim plate ring 640 is symmetrically formed with a plurality of second adjusting holes 642, the second adjusting holes 642 are located outside the first adjusting holes 641, one end of the adapter ring 300, which is far away from the flange 210, is formed with a plurality of second bolt holes 310, one end of the plurality of tightening screws 700 is in threaded connection with the corresponding second bolt holes 310, the other end passes through the corresponding second adjusting holes 642, the tightening screws 700 are in threaded connection with tightening nuts 710, the tightening nuts 710 are sleeved on the tightening screws 700, and the tightening nuts 710 can move along the tightening screws 700 when rotating, and the tightening nuts 710 are used for propping against one side of the shim plate ring 640, which is far away from the adapter ring 300, to adjust the distance between the shim plate ring 640 and the adapter ring 300.

Referring to fig. 1 to 10, it can be understood that a plurality of third bolt holes 612 are symmetrically formed around one end of the carrier ring 610, which is far away from the seal ring 500, and the number of the third bolt holes 612 is equal to that of the first bolt holes 611, a plurality of third adjusting holes 643 are symmetrically formed around the backing plate ring 640, studs 613 are threadedly connected in the third bolt holes 612, and springs 630 are sleeved on each stud 613. The end of the stud 613 far away from the carrier ring 610 passes through the third adjustment hole 643, the stud 613 is sleeved with a limit nut 614, the limit nut 614 is used for propping against the end of the backing plate ring 640 far away from the carrier ring 610, and the limit nut 614 can prevent the stud 613 from being separated from the third adjustment hole 643. The diameter of the third adjusting hole 643 is larger than that of the stud 613, so that the damage to the stud 613 during the movement of the backing plate ring 640 can be effectively avoided, and the service life of the device is prolonged.

Referring to fig. 7 and 8, it can be understood that the studs 613 and the guide studs 620 are installed alternatively, the studs 613 play a limiting role, the guide studs 620 play a guiding role, and the arrangement of the studs 613 and the guide studs 620 alternatively enables the supporting body ring 610 and the backing plate ring 640 to be stressed uniformly, so that the backing plate ring 640 slides along the guide studs 620 more smoothly.

Referring to fig. 1, it can be appreciated that a sealing ring is interposed between the adapter ring 300 and the flange 210 to prevent external air from entering the pipe 200 through a gap between the adapter ring 300 and the flange 210. The operation safety of the equipment is improved.

Referring to fig. 1, it can be appreciated that the adapter ring 300 is bolted to the shield 800 on a side thereof remote from the flange 210, and the elastic assembly 600 is located within the shield 800. The protection cover 800 serves to protect the elastic assembly 600 from rust when the elastic assembly 600 is exposed to the outside air.

Referring to fig. 1, it can be understood that the protective cover 800 is sleeved on the cable 100, and an insulation waterproof cement 900 is filled between the protective cover 800 and the cable 100, and the insulation waterproof cement 900 seals a gap between the protective cover 800 and the cable 100 to prevent air from entering the protective cover 800.

Referring to fig. 1, it can be understood that the pipe 200 is filled with an insulating agent, the insulating agent is silicone oil or polyisobutylene, the insulating agent impregnates and protects solid insulation such as the cable 100, and bubbles in the insulation are filled, so that external air and moisture are prevented from entering, and insulation reliability is ensured.

The installation step comprises the following steps: the support body ring 610, the guide studs 620, the springs 630 and the backing plate ring 640 are pre-assembled into an elastic assembly 600, the surface of the cable 100 and the inner surface of the sealing ring 500 are coated with insulating agents for lubrication, the cable 100 is sleeved with the protection cover 800, the elastic assembly 600, the sealing ring 500 and the sealing cover 400 in sequence, the sealing cover 400 is connected to the flange 210 through bolts of the outer pressing ring 201, the tightening screw 700 is screwed into the second bolt hole 310 on the adapter ring 300, the second adjusting hole 642 on the backing plate ring 640 is sleeved at one end, far away from the adapter ring 300, of the tightening screw 700, the tightening nut 710 is installed, the tightening nut 710 is evenly screwed, the support body ring 610 is tightly pressed against the sealing ring 500, then the protection cover 800 is connected to the adapter ring 300 through bolts, and the insulation waterproof cement 900 is filled between the protection cover 800 and the cable 100. An insulating agent is then injected into the pipe 200.

The embodiments of the present utility model have been described in detail with reference to the accompanying drawings, but the present utility model is not limited to the above embodiments, and various changes can be made within the knowledge of one of ordinary skill in the art without departing from the spirit of the present utility model.

Claims

1. A sealing structure for preventing expansion and retraction of plastic, for sealing a gap between a cable (100) and a pipe (200) into which the cable (100) is inserted, characterized by comprising:

an adapter ring (300) detachably connected to a flange (210) at the end of the pipe (200);

the outer peripheral wall of the sealing cover (400) is fixedly connected with the inner wall of the adapter ring (300), the sealing cover (400) is a hollow cone extending towards the inside of the pipeline (200), and a central hole (401) for the cable (100) to penetrate is formed in the center of the sealing cover (400);

a sealing ring (500) sleeved on the cable (100) and used for sealing a gap between the cable (100) and the sealing cover (400);

the elastic component (600) is sleeved on the cable (100), and the elastic component (600) can drive the sealing ring (500) to move towards the direction of narrowing the sealing cover (400) and enable the sealing ring (500) to always seal a gap between the cable (100) and the sealing cover (400);

the tightening screws (700) are connected to the adapter ring (300) at one end and movably connected to the elastic component (600) at the other end, and the tightening screws (700) are used for adjusting the pressing force of the elastic component (600) on the sealing ring (500).

2. A seal for preventing expansion and retraction of plastic according to claim 1 wherein: the elastic assembly (600) comprises a support body ring (610), a plurality of guide studs (620), a plurality of springs (630) and a backing plate ring (640), wherein a plurality of first bolt holes (611) are formed in one end, far away from the sealing ring (500), of the support body ring (610), the guide studs (620) are respectively connected with the corresponding first bolt holes (611) in a threaded mode, the springs (630) are sleeved on the guide studs (620), one ends of the springs (630) are abutted against the support body ring (610), the other ends of the springs are abutted against the backing plate ring (640), a plurality of first adjusting holes (641) with the sizes matched with the guide studs (620) are formed in the backing plate ring (640), the corresponding guide studs (620) are respectively provided with one ends, far away from the support body ring (610), and the distance between the backing plate ring (640) and the switching ring (300) can be adjusted by the tightening screw (700).

3. A seal for preventing expansion and retraction of plastic according to claim 2 wherein: the backing plate ring (640) is provided with a plurality of second adjusting holes (642), the second adjusting holes (642) are located on the outer side of the first adjusting holes (641), one end of the adapter ring (300) away from the flange (210) is provided with a plurality of second bolt holes (310), one end of the tightening screw (700) is in threaded connection with the corresponding second bolt holes (310), the other end of the tightening screw passes through the corresponding second adjusting holes (642), the tightening screw (700) is in threaded connection with a tightening nut (710), and the tightening nut (710) is used for propping against one side, away from the adapter ring (300), of the backing plate ring (640) to adjust the distance between the backing plate ring (640) and the adapter ring (300).

4. A seal for preventing expansion and retraction of plastic according to claim 3 wherein: the support body ring (610) is kept away from a plurality of third bolt holes (612) have been seted up to the one end of sealing ring (500), a plurality of third regulation hole (643) have been seted up to backing plate ring (640), threaded connection has stud (613) in third bolt hole (612), stud (613) are kept away from the one end of support body ring (610) is passed third regulation hole (643), the cover is equipped with stop nut (614) on stud (613), stop nut (614) be used for with backing plate ring (640) are kept away from one end of support body ring (610) offsets, stop nut (614) can prevent stud (613) follow break away from in third regulation hole (643).

5. A seal for preventing expansion and retraction of plastic according to claim 4 wherein: the studs (613) are mounted in spaced relation to the guide studs (620).

6. A seal for preventing expansion and retraction of plastic according to claim 1 wherein: a sealing ring is clamped between the adapter ring (300) and the flange (210).

7. A seal for preventing expansion and retraction of plastic according to claim 1 wherein: one side of the adapter ring (300) far away from the flange (210) is connected with a protective cover (800), and the elastic component (600) is positioned in the protective cover (800).

8. A seal for preventing expansion and retraction of plastic according to claim 7 wherein: an insulating waterproof cement (900) is filled between the protective cover (800) and the cable (100).

9. A seal for preventing expansion and retraction of plastic according to claim 1 wherein: an insulating agent is poured into the pipeline (200).