A cable pipe plugging device with strong sealing performance

Abstract

The present invention discloses a cable pipe plugging device with strong sealing performance. The device includes a bottom ring, a flexible ring is attached to the right side of the bottom ring, and an outer ring is attached to the right side of the flexible ring. A plurality of limiting grooves are formed on the bottom ring. The bottom ring, the flexible ring and the outer ring are connected by screws, and the screwing part of the screw, i.e., the screw head, falls into the limiting grooves. A bottom limiting protrusion is installed on the bottom ring, and the bottom limiting protrusion is embedded in the flexible ring. An outer limiting protrusion is installed on the left side of the outer ring, and the outer limiting protrusion is embedded in the flexible ring. A nut is screwed on the screw, and the bottom ring, the flexible ring and the outer ring are locked by the nut. For the cable pipe plugging device of the present application, due to the filling effect of the glue, the potholes on the pipe are filled with the glue, thereby enhancing the sealing effect. Moreover, when the glue ages, the flexible ring can still play a certain sealing role.

Description

Technical Field

[0001] The present invention mainly relates to the field of cable duct plugging, and specifically to a cable duct plugging device with strong sealing performance. Background Art

[0002] The main function of cable duct sealing is to prevent sewage and rainwater from flowing into the duct, causing the cable to operate under risk of being soaked in water for a long time, prevent sewage and rainwater from seeping through the duct, endangering the operation safety of adjacent inspection wells or substations / switching stations; prevent sewage from bringing sand, mud and garbage into the duct, blocking the cable duct and affecting subsequent line inspection and maintenance; prevent small animals from entering the cable duct, gnawing and damaging the cable, and breeding and scurrying inside the duct. The existing cable duct plugging method is to use the expansion of the plugging device for plugging, generally made of rubber material. The rubber expands inside and outside under force to fill the cross-section of the cable duct for plugging. However, the sealing tightness of the rubber expansion is limited. When encountering heavy rain and the rain washes the plugging opening, the plugging device is likely to loosen, and the service life of the plugging device is insufficient. The long-term scouring of water waves causes water seepage at the plugging place, resulting in easy damage to the plugging device.

[0003] In the prior art, the patent with the publication number CN113972606A of an invention patent application discloses an impact-resistant cable duct plugging device to solve the problems that the existing plugging device has limited plugging tightness and insufficient service life. It includes an inner plugging member and an outer plugging member. The inner plugging member includes an upper stop plate, and an inner sealing sleeve is arranged at the bottom end of the upper stop plate; the outer plugging member includes a lower stop plate, and an outer sealing sleeve is arranged at the top end of the lower stop plate; a plurality of bolts penetrate between the upper stop plate and the lower stop plate, and an installation ring is rotatably connected to the middle of the plurality of bolts; an impact-resistant component is arranged in the inner cavity of the inner sealing sleeve and the outer sealing sleeve. The impact-resistant component includes a fixing rod, the fixing rod is arranged at the bottom end of the upper stop plate, a movable cup-shaped column is sleeved at the end of the fixing rod, a compression spring is sleeved on the fixing rod, a rotating seat is arranged at the bottom of the movable cup-shaped column, the rotating seat is hinged to two connecting rods, and fan-shaped extrusion blocks are clamped in the movable grooves opened on both sides of the installation ring, and the upper ends of the connecting rods are hinged to the fan-shaped extrusion blocks.

[0004] The above technical solution solves the problems put forward in the above background art to a certain extent. However, the structure of its impact-resistant component adopts a mechanical structure, which leads to a relatively complex structure, resulting in a high cost in production, manufacturing and use. Moreover, the above technical solution still basically adopts an expansion-type plugging, and its sealing performance depends on the smoothness of the inner wall of the cable duct. When there are local depressions or unevenness in the cable duct, the above technical solution will reduce its sealing performance, resulting in water entering the cable duct.

[0005] In the prior art, there is a technical solution of using expanding glue to seal cable ducts. For example, the technical solution disclosed in the patent publication number CN110295024B: A cable duct sealant and its usage method. The cable duct sealant includes two components, A and B. Component A, by weight, includes: 70 - 80 parts of dihydroxy polyether; 2 - 4 parts of chain extender; 5 - 8 parts of crosslinking agent; 1 - 1.5 parts of silicone surfactant; 1.5 - 2 parts of water and 1 - 1.5 parts of amine-based trimerization catalyst; Component B is composed of diphenylmethane diisocyanate (MDI) and polyphenyl polymethylene polyisocyanate (PAPI) mixed in a mass ratio of 90:(8 - 10); The ratio of the two components A and B, by mass, is: 100:(70 - 80). The present invention uses an expanding cable duct sealant for segmented sealing of cable ducts, integrating waterproofing, sealing, and anti-theft, and can achieve multiple effects of permanent sealing, corrosion resistance, prevention of rat and ant damage.

[0006] The above technical solution uses a permanent sealant of expanding glue for cable ducts. However, during construction, the position of the cable in the cable duct needs to be considered. The cable must be centered in the cable duct to enable the expanding glue to be distributed between the cable and the cable duct for sealing. If the cable is not centered in the cable duct, for example, the cable is in contact with the inner wall of the cable duct, it will cause the contact part between the cable and the inner wall of the cable duct to be unable to be effectively coated with glue. When the cable shifts or vibrates, cracks will occur at the contact part between the cable and the inner wall of the cable duct, resulting in the sealing failure of the cable duct. Therefore, in summary, the existing sealing devices have the problem of loose sealing, and the use of expanding glue for sealing is also prone to sealing failure during later use. Summary of the Invention

[0007] The purpose of the present invention is to provide a cable duct sealing device to overcome the deficiencies of the prior art. To achieve the above purpose, the technical solution adopted by the present invention is:

[0008] A cable pipe plugging device with strong sealing performance. The device includes a bottom ring, a flexible ring is attached to the right side of the bottom ring, an outer ring is attached to the right side of the flexible ring, a plurality of limiting grooves are formed on the bottom ring, the bottom ring, the flexible ring and the outer ring are connected by screws, and the screwing part of the screw, i.e., the screw head, falls into the limiting grooves. A bottom limiting protrusion is installed on the bottom ring, and the bottom limiting protrusion is embedded in the flexible ring. An outer limiting protrusion is installed on the left side of the outer ring, and the outer limiting protrusion is embedded in the flexible ring. A nut is screwed on the screw, and the bottom ring, the flexible ring and the outer ring are locked by the nut. An expansion channel is formed in the flexible ring, and the expansion channel is a groove-like structure composed of an inner expansion groove located inside and an outer expansion groove located outside. The screw passes through the expansion channel. An inner glue groove is formed on the inner surface of the flexible ring, and an outer glue groove is formed on the outer surface of the flexible ring. Among them, a filling channel is formed on the lower screw, a filling port is installed at the outer end of the filling channel, and the inner end of the filling channel is communicated with the expansion channel.

[0009] A first communication groove connecting the expansion channel and the outer glue groove is formed at the lower part of the flexible ring.

[0010] A second communication groove connecting the inner glue groove and the expansion channel is formed at the lower part of the flexible ring.

[0011] A third communication groove connecting the inner glue groove and the expansion channel is formed at the upper part of the flexible ring.

[0012] A fourth communication groove connecting the expansion channel and the outer glue groove is formed at the upper part of the flexible ring.

[0013] A glue outlet groove connecting the outer glue groove and the outside of the outer ring is formed at the upper parts of the outer surfaces of the flexible ring and the outer ring.

[0014] The construction method of the device includes the following steps:

[0015] ① First, put the bottom ring, the flexible ring and the outer ring on the cable, then insert the whole into the cable pipe with the filling port facing downwards, and then screw the nut.

[0016] ② Under the action of the nut, the screw and the screwing part of the screw head in the limiting groove, the outer ring squeezes the flexible ring. Then, under the action of the expansion channel in the flexible ring, the flexible ring expands both inwards and outwards, thereby squeezing the cable and the cable pipe to form a seal.

[0017] ③ Inject the sealant through the filling port. The sealant enters the expansion channel through the filling channel, then enters the outer glue groove from the first communication groove, enters the inner glue groove from the second communication groove, and then the sealant rises from the inner glue groove and the outer glue groove. Then, it enters the upper part of the expansion channel through the third communication groove, and then enters the glue outlet groove through the fourth communication groove and is discharged. When the glue is discharged from the glue outlet groove, stop injecting the sealant.

[0018] ④ After the sealant solidifies, use the sealant to fill the outer glue groove, inner glue groove, and expansion channel to prevent the expansion channel from retracting and simultaneously perform adhesive sealing on the contact parts of the flexible ring with the cable pipe and the cable.

[0019] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0020] In this application, the bottom ring, flexible ring, and outer ring are sleeved on the cable, and then the whole is inserted into the cable pipe with the filling port facing downward. Then, the nut is screwed. Under the action of the nut screw itself and the screw head in the limiting groove, the outer ring squeezes the flexible ring. Then, under the action of the expansion channel in the flexible ring, the flexible ring expands inward and outward simultaneously to squeeze the cable and the cable pipe to form a seal. Then, sealant is filled through the filling port. The glue enters the expansion channel through the filling channel, then enters the outer glue groove from the first communication groove, enters the inner glue groove from the second channel, and then the glue rises from the inner glue groove and the outer glue groove, and then enters the upper expansion channel through the third communication groove, and then is discharged from the glue discharge groove through the fourth communication groove. When the glue is discharged from the glue discharge groove, stop filling the glue. Then, after the glue solidifies, the glue fills the outer glue groove, inner glue groove, and the expansion channel to prevent the expansion channel from retracting and simultaneously perform adhesive sealing on the contact parts of the flexible ring with the cable pipe and the cable. Compared with the prior art, due to the filling effect of the glue, the pits and bumps on the pipeline are filled with the glue, thereby increasing the sealing effect. And when the glue ages, the flexible ring can still play a certain sealing role. Description of the Drawings

[0021] Figure 1 It is a cross-sectional view of the present invention;

[0022] Figure 2 It is an external view of the present invention;

[0023] Figure 3 It is a right view of the present invention;

[0024] In the figure: 1, bottom ring; 2, flexible ring; 3, outer ring; 4, limiting groove; 5, screw; 6, screw head of the screwing part; 7, bottom limiting protrusion; 8, outer limiting protrusion; 9, nut; 10, expansion channel; 11, inner expansion groove; 12, outer expansion groove; 13, inner glue groove; 14, outer glue groove; 15, filling channel; 16, filling port; 17, first communication groove; 18, second communication groove; 19, third communication groove; 20, fourth communication groove; 21, glue discharge groove. Detailed Embodiments

[0025] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings in the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0026] Please refer to Figures 1-3 , an embodiment provided by the present invention: a cable pipe plugging device with strong sealing performance. The device includes a bottom ring 1, a flexible ring 2 is attached to the right side of the bottom ring 1, an outer ring 3 is attached to the right side of the flexible ring 2, a plurality of limiting grooves 4 are formed on the bottom ring 1, the bottom ring 1, the flexible ring 2 and the outer ring 3 are connected by a screw 5, and the screwing part, the screw head 6 of the screw 5 falls into the limiting groove 4. A bottom limiting protrusion 7 is installed on the bottom ring 1, and the bottom limiting protrusion 7 is embedded in the flexible ring 2. An outer limiting protrusion 8 is installed on the left side of the outer ring 3, and the outer limiting protrusion 8 is embedded in the flexible ring. A nut 9 is screwed on the screw 5, and the bottom ring 1, the flexible ring 2 and the outer ring 3 are locked by the nut 9. An expansion channel 10 is formed in the flexible ring 2, and the expansion channel 10 is a groove-like structure composed of an inner expansion groove 11 located inside and an outer expansion groove 12 located outside. The screw 5 passes through the expansion channel 10. An inner glue groove 13 is formed on the inner surface of the flexible ring 2, and an outer glue groove 14 is formed on the outer surface of the flexible ring 2. Among them, a filling channel 15 is formed on the lower screw 5, a filling port 16 is installed at the outer end of the filling channel 15, and the inner end of the filling channel 15 is communicated with the expansion channel 10.

[0027] A first communication groove 17 for connecting the expansion channel and the outer glue groove is formed at the lower part of the flexible ring 2.

[0028] A second communication groove 18 for connecting the inner glue groove and the expansion channel is formed at the lower part of the flexible ring 2.

[0029] A third communication groove 19 for connecting the inner glue groove and the expansion channel is formed at the upper part of the flexible ring 2.

[0030] A fourth communication groove 20 for connecting the expansion channel and the outer glue groove is formed at the upper part of the flexible ring 2.

[0031] A glue outlet groove 21 for connecting the outer glue groove and the outside of the outer ring is formed at the upper part of the outer surfaces of the flexible ring 2 and the outer ring 3.

[0032] The construction method of the device includes the following steps:

[0033] ① First, put the bottom ring 1, the flexible ring 2 and the outer ring 3 on the cable, and then insert the whole into the cable pipe, making the filling port 16 face downward, and then screw the nut 9;

[0034] ②Under the action of the nut 9, the screw rod 5, and the screw head 6 of the screwing part in the limiting groove 4, the outer ring extrusion 3 presses the flexible ring 2. Then, under the action of the expansion channel in the flexible ring 2, the flexible ring 2 expands inward and outward simultaneously, thereby squeezing the cable and the cable pipe to form a seal.

[0035] ③Sealant is injected through the injection port 16. The sealant enters the expansion channel 10 through the injection channel 15, then enters the outer glue groove 14 from the first connection groove 17, enters the inner glue groove 13 from the second connection groove 18. Then the sealant rises from the inner glue groove 13 and the outer glue groove 14, and then enters the upper part of the expansion channel 10 through the third connection groove 19, and then is discharged through the fourth connection groove 20 into the glue discharge groove 21. When the glue is discharged from the glue discharge groove 21, the injection of the sealant is stopped.

[0036] ④After the sealant solidifies, the expansion channel 10, the outer glue groove 14, and the inner glue groove 13 are filled with the sealant to prevent the expansion channel 10 from retracting and at the same time perform glue bonding and sealing on the contact parts between the flexible ring 2 and the cable pipe and the cable.

[0037] It should be noted that the terms "first", "second", etc. in the description, claims, and above-mentioned drawings of this application are used to distinguish similar objects, and do not necessarily need to be used to describe a specific order or sequence. It should be understood that such data can be interchanged under appropriate circumstances so that the embodiments of this application described here can be implemented in an order other than those illustrated or described here.

[0038] The above are only the preferred embodiments of the present invention and are not used to limit the present invention. For those skilled in the art, the present invention can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A cable pipe plugging device with strong sealing performance, characterized in that, The device includes a bottom ring (1), a flexible ring (2) is attached to the right side of the bottom ring (1), an outer ring (3) is attached to the right side of the flexible ring (2), a plurality of limiting grooves (4) are formed on the bottom ring (1), the bottom ring (1), the flexible ring (2) and the outer ring (3) are connected by a screw (5), the screwing part, i.e., the screw head (6), of the screw (5) falls into the limiting groove (4), a bottom limiting protrusion (7) is installed on the bottom ring (1), the bottom limiting protrusion (7) is embedded in the flexible ring (2), an outer limiting protrusion (8) is installed on the left side of the outer ring (3), the outer limiting protrusion (8) is embedded in the flexible ring, a nut (9) is screwed on the screw (5), and the bottom ring (1), the flexible ring (2) and the outer ring (3) are locked by the nut (9). An expansion channel (10) is formed in the flexible ring (2), and the expansion channel (10) is a groove-shaped structure including an inner expansion groove (11) located on the inner side and an outer expansion groove (12) located on the outer side. The screw (5) passes through the expansion channel (10). An inner glue groove (13) is formed on the inner surface of the flexible ring (2), and an outer glue groove (14) is formed on the outer surface of the flexible ring (2). Among them, a filling channel (15) is formed on the screw (5) located at the lower part, a filling port (16) is installed at the outer end of the filling channel (15), and the inner end of the filling channel (15) is communicated with the expansion channel (10). A first communication groove (17) for communicating the expansion channel and the outer glue groove is formed at the lower part of the flexible ring (2); a second communication groove (18) for communicating the inner glue groove and the expansion channel is formed at the lower part of the flexible ring (2); a third communication groove (19) for communicating the inner glue groove and the expansion channel is formed at the upper part of the flexible ring (2); a fourth communication groove (20) for communicating the expansion channel and the outer glue groove is formed at the upper part of the flexible ring (2); a glue outlet groove (21) for communicating the outer glue groove and the outside of the outer ring is formed at the upper part of the outer surfaces of the flexible ring (2) and the outer ring (3).

2. The cable pipe plugging device with strong sealing performance according to claim 1, characterized in that: The construction method of the device includes the following steps: ① First, put the bottom ring (1), the flexible ring (2) and the outer ring (3) on the cable, then insert the whole into the cable pipe, make the filling port (16) face downward, and then screw the nut (9). ② Under the action of the nut (9), the screw (5) and the screwing part, i.e., the screw head (6), in the limiting groove (4), the outer ring (3) presses the flexible ring (2), and then under the action of the expansion channel in the flexible ring (2), the flexible ring (2) expands inwards and outwards simultaneously to squeeze the cable and the cable pipe to form a seal. ③ Sealant is injected through the filling port (16). The sealant enters the expansion channel (10) through the filling channel (15), then enters the outer glue groove (14) from the first connecting groove (17), enters the inner glue groove (13) from the second connecting groove (18), and then the sealant rises from the inner glue groove (13) and the outer glue groove (14), and then enters the upper part of the expansion channel (10) through the third connecting groove (19), and then is discharged through the fourth connecting groove (20) into the glue discharge groove (21). When the glue is discharged from the glue discharge groove (21), stop injecting the sealant; ④ After the sealant solidifies, the outer glue groove (14), the inner glue groove (13) and the expansion channel (10) are filled with the sealant to prevent the expansion channel (10) from retracting and at the same time bond and seal the contact parts between the flexible ring (2) and the cable pipe and the cable.

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