CN114552489A - Detachable Hough bell-mouth cable leading-in device and cable pipe-penetrating laying construction method - Google Patents

Abstract

The invention provides a detachable huff bell-mouth cable leading-in device and a cable pipe-penetrating laying construction method, wherein the device is arranged at the port part of a threading guide pipe or a pre-buried wall-penetrating pipe and comprises a huff bell-mouth structure formed by oppositely enclosing two symmetrical flange connecting bodies, and a fastening gap is reserved at the enclosed butt joint part of the two flange connecting bodies of the huff bell-mouth structure; the two flange connectors are secured by fasteners that pass through the ears of the adjoining flanges. The device replaces the original bell mouth manufactured on site, and can be disassembled after the cable pipe penetrating and laying are finished, convenience and conditions are provided for installing the sealing structure or the flexible sealing assembly on the port part of the subsequent threading guide pipe or the embedded wall penetrating pipe after the disassembly, the disassembled bell mouth device can be repeatedly used, the installation is convenient, and the cost is saved; the device adopts half horn mouth structure, is applicable to various occasions that the cable poling lays, can dismantle and need not cut the cable according to the condition, convenient to use.

Description

Detachable Hough bell-mouth cable leading-in device and cable pipe-penetrating laying construction method

Technical Field

The invention belongs to the technical field of electrical engineering in industrial buildings, civil buildings and municipal buildings, and particularly relates to a detachable huff bell-mouthed cable leading-in device and a cable pipe-penetrating laying construction method, wherein the device is used in cable and optical cable pipe-penetrating laying construction and underground direct-buried cable and optical cable pipe-penetrating laying construction so as to protect the outer layer of the device from being damaged; the cable pipe-penetrating laying construction method relates to a pipe orifice sealing technology of a threading guide pipe or a direct-buried cable wall-penetrating pipe in some occasions.

Background

According to the technical requirements of a standard atlas, in order to avoid that excessive friction is generated between a conduit end and a cable and an external insulating layer of the cable is damaged in the process of threading and laying the cable (an electric cable or an optical cable), a cable leading-in device is arranged at the conduit end (the conduit end is usually designed and processed into a bell mouth shape), so that the problems can be avoided, the conventional bell mouth processing method is to perform heating rolling forming on a pipeline port, but because corresponding heating rolling equipment is not arranged on a construction site, when other processing methods are adopted, the bell mouth forming defects are often caused, the phenomena of incomplete extension, cracking and scrapping occur, the processing difficulty is high, the cost is high, no matter which processing method is adopted, the anticorrosive layer of the conduit is necessarily damaged, and secondary anticorrosive treatment is required to be performed in the later stage, at present, although the bell mouth is tried to be separated and is processed in a factory, the field assembly mode replaces the current field processing method, but still does not fundamentally solve the technical problems of detachability, pipe orifice plugging in the later period and the like after the cables and the optical cables are laid.

Disclosure of Invention

In order to solve one or more problems, the invention provides a detachable huff bell mouth cable leading-in device which is suitable for the construction of cable pipe-penetrating laying and underground direct-buried cable and optical cable home-entry end penetrating conduit laying, protects the cable, the optical cable outer insulation layer and the conduit from being damaged by excessive friction, can be detached for repeated use after the cable and the optical cable are laid, and can provide conditions for sealing and plugging the pipe orifice after pipe penetration.

The technical scheme adopted by the invention is as follows:

a detachable Hafu horn mouth cable leading-in device is installed at the port part of a threading guide pipe (02) or a pre-buried wall penetrating pipe (01), and comprises a Hafu horn mouth structure (100) formed by oppositely enclosing two symmetrical flange connecting bodies (1), wherein a fastening gap is reserved at the enclosed butt joint part of the two flange connecting bodies (1) of the Hafu horn mouth structure (100); the flange connector (1) comprises a guide sleeve part (11), a guide part (12) and a limiting part (13) which are integrally formed, the guide sleeve part (11) is of a half-straight-cylindrical structure, the guide part (12) is of an outward-expanding arc-shaped structure, the limiting part (13) is an inner step which extends inwards along the circumferential direction at the joint of the guide sleeve part (11) and the guide part (12), and flange ear edges (111) extend outwards along the radial direction at two sides of the axial plane of the guide sleeve part (11) respectively; the two flange connection bodies (1) are fixed by fasteners (2) penetrating through the lugs (111) of the adjacent flanges.

In the detachable huff-and-puff cable lead-in device, a group of fastening pieces (2) are respectively arranged at the flange ear edges (111) at two sides of the huff-and-puff structure (100), and each group of fastening pieces (2) at least comprises two huff fastening bolts.

In the detachable huff bell-mouth cable leading-in device, the range of the huff fastening clearance is one tenth of the nominal diameter of the threading guide pipe (02) or the embedded wall penetrating pipe (01).

In the detachable huff bell-mouth cable leading-in device, guide sleeve parts (11) of two flange connectors (1) are encircled to form a straight cylinder guide sleeve, the straight cylinder guide sleeve is sleeved and fixed at the end part of a threading guide pipe (02) or a pre-embedded wall penetrating pipe (01), guide parts (12) of the two flange connectors (1) are encircled to form a bell mouth, two limiting parts (13) are encircled to form an annular inner step, and the radial width of the annular inner step is consistent with the wall thickness of the threading guide pipe (02) or the pre-embedded wall penetrating pipe (01).

In the detachable huff bell-mouth cable leading-in device, after the cable is laid in place through the pipe, the huff bell-mouth structure (100) is detached from the port part of the threading guide pipe (02) or the embedded wall penetrating pipe (01) for installing the sealing structure (4).

The detachable Hafu horn mouth cable leading-in device further comprises a pipe hoop (3), the pipe hoop (3) is a straight pipe with two open ends, internal threads are arranged at two ends of the pipe hoop (3), the outer wall of the first end of the pipe hoop (3) is matched with the inner wall of a straight pipe guide sleeve formed by surrounding the guide sleeve parts (11) of the two flange connectors (1), and the radial width of an annular inner step formed by surrounding the limiting parts (13) of the two flange connectors (1) is consistent with the pipe wall thickness of the pipe hoop (3); the internal thread of the second end part of the pipe hoop (3) is connected with the external thread of the port part of the threading guide pipe (02) or the embedded wall penetrating pipe (01) in a matching way.

In the detachable huff-and-puff cable leading-in device, after the cable is laid in place through a pipe, the fastening piece (2) is loosened to separate the huff-and-puff structure (100) from the pipe hoop (3), and the pipe hoop (3) after the huff-and-flare structure (100) is detached is used for mounting the flexible sealing assembly (5).

The invention also provides a cable pipe-penetrating laying construction method, which is based on the detachable Hafu horn mouth cable leading-in device for construction and comprises the following steps:

sleeving guide sleeve parts (11) of two flange connectors (1) on the periphery of the end part of a threading guide pipe (02) or an embedded wall-penetrating pipe (01), fixedly surrounding the two flange connectors (1) together by using a fastener (2) to form a half bell mouth structure (100), matching and fixing the inner wall of a straight cylinder guide sleeve of the half bell mouth structure (100) with the outer wall of the threading guide pipe (02) or the embedded wall-penetrating pipe (01), or matching and fixing the inner wall of a straight cylinder guide sleeve of the half bell mouth structure (100) with the outer wall of one end part of a pipe hoop (3), and screwing the other end part of the pipe hoop (3) on the periphery of the port of the embedded wall-penetrating pipe (01) or the threading guide pipe (02);

and (3) passing the cable through the threading guide pipe (02) or the embedded wall penetrating pipe (01) until the cable is laid in place.

The cable pipe-penetrating laying construction method comprises the following steps:

the detachable Hafu horn mouth cable leading-in device is detached, and a sealing structure (4) is additionally arranged at the port part of a pre-buried wall penetrating pipe (01) or a threading guide pipe (02) under the condition that the cable is not cut off.

The invention also provides another cable pipe-penetrating laying construction method, which is based on the detachable Hafu horn mouth cable leading-in device for construction and comprises the following processes:

sleeving guide sleeve parts (11) of two flange connectors (1) on the periphery of a first end part of a pipe hoop (3), fixing and enclosing the two flange connectors (1) together by using a fastener (2) to form a Hough bell mouth structure (100), and matching and fixing the inner wall of a straight cylinder guide sleeve of the Hough bell mouth structure (100) and the outer wall of the first end part of the pipe hoop (3);

screwing the second end part of the pipe hoop (3) with the built-in threaded adjusting check ring (51) on the periphery of the port of the embedded wall-penetrating pipe (01) or the threading guide pipe (02), pre-sleeving a sealing ring group (53) and an end part locking gland (54) on a cable, and laying the cable in place;

the half bell mouth structure (100) is detached from the pipe hoop (3), and the pipe hoop (3) is reserved; installing two half joint sealing check rings (52) on a cable, enabling a sealing ring group (53) to be located between the two half joint sealing check rings (52), and installing a flexible sealing element formed by the two half joint sealing check rings (52) and the sealing ring group (53) in place;

the flexible sealing elements are sequentially extruded and pushed into the pipe hoop (3) until the flexible sealing elements contact with the thread adjusting retainer ring (51), and then the threaded end of the end part locking gland (54) is screwed into the pipe hoop (3), so that the sealing ring group (53) in the sealed cavity forms enough pre-pressing pre-tightening force, namely the sealing ring group (53) is in a three-way stress state to form static seal.

By adopting the technical scheme, the invention has the following characteristics and beneficial effects:

the device adopts factory processing to manufacture standardized products, replaces the original construction process method for manufacturing the bell mouth on site, can be disassembled after the cable pipe penetrating and laying are finished, provides convenience and conditions for installing a sealing structure or a flexible sealing assembly at the port part of a subsequent threading guide pipe or an embedded wall penetrating pipe after the disassembly, can be repeatedly used, is convenient to install and saves the cost; the device adopts half horn mouth structure, is applicable to various occasions that the cable poling lays, can dismantle and need not cut the cable according to the condition, convenient to use.

Drawings

FIG. 1A is a schematic view of a flange connector (one of the base members) forming the removable Huffman flare cable entry device of the present invention;

FIG. 1B is a schematic structural view of a structure where two flange connectors surround to form a Huffman bell mouth structure, taken along the line A-A in FIG. 1A;

fig. 2A is a schematic view of an application of the detachable huff-bell cable introduction device in a transition pipe well according to an embodiment of the present invention (the left side is a state after the device is detached, and the right side is a state before the device is detached);

FIG. 2B is a schematic diagram of a second application of the detachable Hafu flare cable entry device of the present invention to a transition pipe well with a shut-off valve (the left side is the detached state of the device, and the right side is the detached state of the device);

FIG. 2C is a schematic diagram of an application of the detachable Haff flare cable introduction device of the present invention in pipe penetration installation of a buried cable house;

FIG. 3 is a schematic structural diagram of a second detachable Haff flare cable introduction device according to an embodiment of the present invention;

FIG. 4A is a schematic view of a second embodiment of the detachable Haff flare cable introduction device of the present invention applied to pipe-through installation of a buried cable house (before detachment);

FIG. 4B is a schematic diagram of a detachable Hough horn cable duct according to a second embodiment of the present invention;

FIG. 4C is a schematic structural view of a flexible seal assembly mounted to a pipe clamp according to a second embodiment of the detachable Haff flare cable introduction device of the present invention.

The reference numbers in the figures denote:

01-embedding a through-wall pipe; 02-threading catheter; 03-a cable; 04-transition pipe well; 05-transition valve wells;

10-a detachable huff bell cable lead-in device;

100-hough bell mouth structure;

1-flange connector, 11-guide sleeve part, 111-flange ear edge, and 112-mounting hole; 12-a guide; 13-a limiting part;

2-a fastener; 3-pipe hoop; 4-a sealing structure;

TH-width of inner step; h-fastening clearance (half fastening clearance);

5-a flexible sealing assembly, 51-a thread adjusting retainer ring, 52-a half joint sealing retainer ring, 53-a sealing ring group and 54-an end locking gland;

SW-indoor (upstream), SI-indoor (downstream).

Detailed Description

In the process of cable pipe-penetrating and laying, in order to reduce the damage of an external insulating layer of a cable, the end of a guide pipe is designed and processed into a bell mouth shape generally, the prior bell mouth processing method is to perform heating, rolling and forming on the end of a pipeline, and the method has the problems of high processing difficulty, high cost, high subsequent construction difficulty, complex process and the like. In order to solve the problems, the invention provides a detachable huff bell-mouth cable leading-in device and a cable pipe-penetrating laying construction method, wherein the device is realized based on a huff bell-mouth structure, the cable pipe-penetrating laying construction comprises a pipe-penetrating process based on the cable leading-in device in the early stage and pipeline sealing and plugging construction in the later stage, and the cable pipe-penetrating laying construction method is operated based on the cable leading-in device, so that the construction process is further simplified, the construction cost is reduced, and the sealing effect is improved.

As shown in fig. 1A and 1B, the huff bell mouth structure 100 is formed by relatively enclosing two symmetric flange connectors 1, the flange connector 1 is one of the base members forming the huff bell mouth structure 100 (also one of the base members of the detachable huff bell mouth cable lead-in device of the present invention), and includes a guide sleeve portion 11, a guide portion 12 and a limit portion 13, which are integrally formed, the guide sleeve portion 11 is a half straight cylindrical structure, the guide portion 12 is an outward-expanding arc structure, the limit portion 13 is an inner step extending inward along a circumferential direction at a junction of the guide sleeve portion 11 and the guide portion 12, flange ears 111 extend outward along a radial direction at two sides of an axial plane of the guide sleeve portion 11, and each flange ear 111 is provided with at least two mounting holes 112 for mounting fasteners 2 (see fig. 1B); the two symmetrical flange connecting bodies 1 are oppositely surrounded, the fastening piece 2 penetrates through the mounting hole 112 on the flange ear edge 111 of the two flange connecting bodies 1, the two flange connecting bodies 1 are fixed at the end part of the threading guide pipe 02 or the embedded wall penetrating pipe 01 (a half fastening gap H is reserved between the flange ear edges 111 of the two flange connecting bodies 1), and then a half bell mouth structure 100 is formed, wherein, two half straight-tube guide sleeve parts 11 surround to form a straight-tube guide sleeve for penetrating and fixing on the threading guide tube 02 or the embedded wall-penetrating tube 01, two outward-expanded arc-shaped guide parts 12 surround to form a horn mouth for penetrating a safety guide cable, two limit parts 13 surround to form an annular inner step for limiting the half horn mouth structure 100, the numerical value of the radial width TH of the annular inner step is different according to the pipe wall thickness of the threading guide pipe 02 or the embedded wall penetrating pipe 01 in the application occasion of the detachable huff bell-mouth cable leading-in device.

In one embodiment, the fastening members 2 are half bolts, and the fastening members 2 on the flange ears 111 are symmetrically arranged so as to apply uniform force.

The detachable huff-and-puff cable introduction device and the cable pipe-penetrating laying construction method according to the present invention will be described in detail with reference to the embodiments and the accompanying drawings. In the following description, different "one embodiment" or "an embodiment" refers to not necessarily the same embodiment. Furthermore, the particular features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.

Example one

Fig. 2A to fig. 2C are schematic application diagrams of a detachable huff-bell cable introduction device according to a first embodiment of the invention. In this embodiment, the removable huff-bell cable introduction device includes a huff-bell configuration 100.

The detachable huff-bell cable lead-in device can be used for the construction of cable through-pipe laying in the transition pipe well 04 and the transition valve well 05 shown in fig. 2A and 2B. The cable laying of building crowd lays each building monomer by the concentrated distribution room in district, because cause the cable poling to lay the difficulty along the way overlength, consequently need increase pipeline transition tube shaft 04, the cable poling of being convenient for lays the construction, and the business turn over mouth of pipe of threading pipe 02 through a transition tube shaft 04 all need set up cable gatherer, produces excessive friction with the cable outer protective layer when avoiding the cable business turn over mouth of pipe and damages the insulating layer. There are two main types of transition tube wells 04 in the pipeline:

one type is a transition pipe well with a shut-off valve (transition valve well 05 for short), see fig. 2B. The pipeline is too long along the way, and the pipeline slope is difficult to control, often can cause individual tube well ponding concentrated, and especially when the transition well of poling cabling closes on to enter one's residence, ponding can be along in threading pipe 02 infiltration building, and under the more serious condition, ponding can directly get into the cable pit in the electricity distribution room along threading pipe 02, causes the whole paralysis accident of electricity distribution room. Therefore, the pipeline along the road is divided into a plurality of sections, and in a proper transition pipe well, the detachable huff-bell cable lead-in device is installed at one port of the threading guide pipe 02 to carry out cable pipe threading construction, wherein the radial width TH of the annular inner step of the huff-bell structure 100 is consistent with the pipe wall thickness of the threading guide pipe 02 installed on the annular inner step; after the pipe penetrating and laying are finished, the detachable Hafu horn mouth cable leading-in device is dismantled, and a sealing structure 4 is additionally arranged at one port of the threading guide pipe 02 (see figure 2C, the sealing structure 4 can also be a commonly used sealing structure at present, for example, in a national standard design and construction drawing set 12D101-05, p102 and p103 of 110kv and the following cable laying, a first laying scheme, a second laying scheme, a third laying scheme, a fourth scheme and a fifth scheme of directly buried cables penetrating through the wall and leading into a building are adopted, and in a method of leading underground cables and optical cables into the building, a first sealing method, a second sealing method and a third sealing method are adopted in a method of leading underground cables and optical cables into the building in an underground communication cable laying mode 05X101-2, p9 and p 10), the effect of the sealing method is similar to a stop valve in a pipeline in a water supply and drainage professional, the original integral accumulated water circulation channel is reasonably divided in sections, so that excessive accumulated water in individual pipeline wells is avoided, or reasonably distributing the diversion accumulated water, leading the accumulated water into a designated centralized well, and uniformly discharging the accumulated water into a rainwater pipe network of the community through a pressure drainage device.

Another type is a transition pipe well between two transition pipe wells with shut-off valves, see fig. 2A. Because the pipeline between the sections is short in extension, excessive water cannot exist in the pipeline, and a sealing device is not required to be installed in the subsequent process, under the working condition, the detachable huff bell-mouth cable leading-in device can be installed at the inlet and outlet ports of the threading guide pipe 02 to carry out cable pipe-penetrating construction, and after the cable is laid and installed, the detachable huff bell-mouth cable leading-in device can be detached for repeated use and can also be reserved.

Another scenario is that the detachable huff bell-mouth cable leading-in device is used for pipe-penetrating laying when entering or exiting a single building, the device is detached after pipe-penetrating laying construction is completed, and a sealing structure 4 is additionally arranged at a port of the threading conduit 02 to prevent outdoor ponding from entering the room, and is specifically shown in fig. 2C.

Example of the removable huff-bell cable lead-in device-the installation process on the threading catheter 02 in the above application is as follows:

the guide sleeve parts 11 of the two flange connectors 1 are sleeved at the end part of a threading guide pipe (cable protection steel pipe) 02, the two flange connectors 1 are locked and fixed together by a fastener 2 to form a Hough bell mouth structure 100, and the inner wall of a straight cylinder guide sleeve of the Hough bell mouth structure 100 is matched and locked and fixed with the outer wall of the threading guide pipe (cable protection steel pipe) 02;

the cable is threaded through threading conduit 02 until the cable is in place.

For the occasion that needs cable poling to lay the construction, the port of threading pipe 02 needs sealed shutoff, still include:

the huff bell mouth structure 100 (i.e. the huff bell mouth cable lead-in device of the first embodiment) is disassembled, and the sealing structure 4 is additionally installed without cutting off the cable (the specific structure and construction process of the sealing structure 4 refer to the relevant standard drawing set, which is not described herein again), so as to function as a stop valve.

In the process of threading the cable, in order to prevent the outer protective layer of the cable from being damaged by rubbing against the inner side edge of the annular inner step of the huff bell mouth structure 100, the inner side edge of the annular inner step is a smooth round angle.

Enough half fastening clearance H is reserved at the joint of the two flange connecting bodies 1 of the half bell mouth structure 100 (the range of the fastening clearance H is preferably about one tenth of the nominal diameter of the threading conduit 02 or the embedded wall penetrating pipe 01).

Example two

Referring to fig. 3, the difference between the huff-bell-mouth cable lead-in device in this embodiment and the first embodiment is that the device is suitable for the occasion of pipe penetration, laying and sealing when an outdoor directly-buried cable enters into a building, and further comprises a pipe hoop 3, the pipe hoop 3 is a straight pipe with two open ends, the guide sleeve parts 11 of the two flange connectors 1 are sleeved on the periphery of the first end part of the pipe hoop 3, and the two flange connectors 1 are fixed together by a fastener to form a huff-bell-mouth structure 100, the inner wall of the straight pipe guide sleeve of the huff-bell-mouth structure 100 is matched and combined with the outer wall of the first end part of the pipe hoop 3, the annular end surface of the pipe hoop 3 is attached to the annular inner step formed by the limiting part 12 of the flange connector 1, and the radial width TH of the annular inner step is consistent with the pipe wall thickness of the pipe hoop 3; the two ends of the pipe hoop 3 are provided with internal threads, and the internal threads of the second end of the pipe hoop 3 are matched with the external threads of the embedded wall penetrating pipe 01 or the threading guide pipe 02.

In the structure of the huff-and-puff cable lead-in device in this embodiment, the wall thickness of the pipe hoop 3 is determined according to the larger wall thickness in the nominal diameter, the radial width TH of the annular inner step of the huff-and-puff structure 100 is also determined accordingly, the inner diameter specification of the pipe hoop 3 is selected only according to the nominal diameter of the threading pipe 02 or the embedded wall-penetrating pipe 01 in the application occasion, and the huff-and-puff structure 100 only needs to adjust the inner diameter of the guide sleeve part 11 of the flange connector 1 according to the outer diameter of the standard pipe hoop 3 and the wall thickness, so that the manufacturing difficulty of the huff-and-puff cable lead-in device is simplified.

In this embodiment, the huff-and-puff cable lead-in device with the pipe hoop 3 can be used in various application occasions where a cable penetrates through a pre-buried wall-penetrating pipe 01 or a threading guide pipe 02, for example, when a direct-buried cable or an optical cable penetrates through a wall to enter a home, the huff-and-puff cable lead-in device of this embodiment is adopted, after the cable is laid, the huff-and-puff structure 100 in the huff-and-puff cable lead-in device is removed, the pipe hoop 3 is retained, the flexible sealing assembly 5 is installed based on the pipe hoop 3, the flexible sealing assembly 5 is different from the existing sealing structure 4, the flexible sealing assembly 5 has a better waterproof sealing effect while ensuring sufficient mechanical strength, and specifically refer to fig. 4A to 4C.

Referring to fig. 4C, the flexible sealing assembly 5 includes a flexible sealing element located inside the pipe hoop 3 and an end locking gland 54 installed at an end of the pipe hoop 3, wherein the pipe hoop 3 is a hollow pipe body, a thread adjusting collar 51 is installed inside a second end of the pipe hoop, an inner diameter of the thread adjusting collar 51 is larger than an outer diameter of the cable or the optical cable, and inner edges of the thread adjusting collar 51 are smooth rounded corners, so that sufficient penetrating space is reserved for the cable or the optical cable penetrating through the inside of the pipe hoop 3, and the outer skin of the cable or the optical cable is prevented from being worn in the penetrating process; a second end internal thread of the pipe hoop 3 is matched and connected with an end external thread of the embedded through-wall pipe 01, and a first end internal thread is used for installing an end locking gland 54; two Haff-section sealing check rings 52 (each Haff-section sealing check ring 52 is a circular ring structure formed by split butt joint of two semi-circular rings) and a flexible sealing element formed by a sealing ring group 53 are arranged between the thread adjusting check ring 51 and the end part locking gland 54, the sealing ring group 53 is positioned between the two Haff-section sealing check rings 52, the inner diameter of each Haff-section sealing check ring 52 is consistent with the outer diameter of a cable or an optical cable, and the outer diameter is smaller than the inner diameter of the pipe hoop 3 and larger than the inner diameter of the thread adjusting check ring 51. The thread adjusting retainer ring 51 and the end locking gland 54 are matched with the half joint sealing retainer ring 52 to form a sealed cavity with the inner wall of the embedded wall penetrating pipe 01, the sealing ring group 53 is located in the sealed cavity, the end locking gland 54 compresses the half joint sealing retainer ring 52 to extrude the sealing ring group 53 in the sealed cavity, so that the sealing ring group 53 is in a three-dimensional stress state, an assembly gap in the cavity is sealed to form a sealed zero space, and the sealing ring group 53 is respectively in a contact stress state under the combined action of the embedded wall penetrating pipe 01, the sealing surface of a cable or an optical cable (namely the inner wall of the embedded wall penetrating pipe 01 and the outer wall of the cable or the optical cable) and the two-side half sealing retainer rings, so that static seal is formed. The threaded adjusting retainer ring 51 and the end locking gland 54 have the function of axially positioning and restraining the Haff section sealing retainer ring 52.

The external thread that screw thread adjustment retaining ring 51 was equipped with cooperates with the internal thread of ferrule 3, and the specification of hough section sealing retaining ring 52 is selected according to the clearance size between the external diameter of cable or optical cable and the pipe hoop 3 internal diameter, adjusts the axial interval of the sealed cavity between screw thread adjustment retaining ring 51 and the tip locking gland 54 through adjustment screw thread adjustment retaining ring 51 and then adjustment to cooperate with the hough section sealing retaining ring 52 of different specifications, make the sealing washer group 53 that is located in the sealed cavity form radial and axial extrusion stress.

The flexible sealing assembly 5 with the structure is mounted in place after the cables are laid and mounted, and is mounted in a state of not cutting off the cables, meanwhile, the sealing ring group 53 is extruded by the half-joint sealing check rings 52, so that the sealing ring group 53 compresses the cables to play a role in positioning the cables, meanwhile, an even sealing cavity is formed between the embedded wall-penetrating pipe 01 or the embedded threading guide pipe 02 and the periphery of the cables, the two half-joint sealing check rings 52 are respectively under the action of the bidirectional constraint locking pressure of the thread adjusting check ring 51 and the end part locking gland 54, the sealing ring group 53 is in the completely closed cavity and reasonably flows in a sealing mode according to the preset direction, so that the inner wall of the sealing cavity generates extrusion stress, a flowing sealing zero space is formed, and a waterproof sealing effect is achieved.

In summary, before cable laying and threading, the huff bell-mouth cable lead-in device of the invention is installed at the port part of the pre-buried wall pipe 01 or the threading conduit 02, and after the cable is threaded and laid, whether the device is to be dismantled or not can be determined according to application occasions, for example, when the device is used as an electrical stop valve in a pipe network transition pipe well, a node well of a pipe network and a pipe network entrance end, the device is to be dismantled; installing an electric tube well stop valve to be used as a technological tool for reuse; in the outlet end of the pipeline and the common pipe well, whether the pipe well is used for a long time can be determined according to the actual situation. In principle, the huff-bell cable lead-in device of the invention is commissioned, preferably removed, after the cable has been laid. The Hafu horn mouth cable leading-in device can completely replace the original field hot rolling processing technology, determines whether to disassemble according to application occasions, can be repeatedly used, simplifies the manufacturing difficulty and complexity of the original horn mouth, reduces the cost and reduces the workload.

Based on the second embodiment of the Hough horn mouth cable leading-in device, the cable pipe-penetrating laying construction method comprises the following processes:

firstly, sleeving guide sleeve parts 11 of two flange connectors 1 on the periphery of a first end part of a pipe hoop 3, fixing the two flange connectors 1 together by using a fastener 2 to form a Hough bell mouth structure 100, and matching, locking and fixing the inner wall of a straight cylinder guide sleeve of the Hough bell mouth structure 100 and the outer wall of the first end part of the pipe hoop 3;

step two, screwing the second end part of the pipe hoop 3 internally provided with the thread adjusting check ring 51 on the periphery of the port of the pre-embedded wall-penetrating pipe 01 or the threading guide pipe 02, pre-sleeving the sealing ring group 53 and the end part locking gland 54 on a cable, and laying the cable in place;

step three, detaching the half bell mouth structure 100 from the pipe clamp 3, and reserving the pipe clamp 3; installing two half joint sealing check rings 52 on a cable, enabling a sealing ring group 53 to be positioned between the two half joint sealing check rings 52, and installing a flexible sealing element formed by the two half joint sealing check rings 52 and the sealing ring group 53 in place;

and step four, sequentially extruding and pushing the flexible sealing elements into the pipe hoop 3 until the flexible sealing elements contact with the thread adjusting check ring 51, and then screwing the thread end of the end part locking gland 54 into the pipe hoop 3, so that the sealing ring group 53 in the sealed cavity forms enough pre-pressing pre-tightening force, namely the sealing ring group 53 is in a three-way stress state to form static seal.

It will be understood by those skilled in the art that these examples are for illustrative purposes only and are not intended to limit the scope of the present invention, and that various equivalent modifications and changes may be made thereto without departing from the scope of the present invention.

Claims (10)

1. A detachable Hafu horn mouth cable leading-in device is installed at a port part of a threading guide pipe (02) or a pre-embedded wall penetrating pipe (01), and is characterized by comprising a Hafu horn mouth structure (100) formed by oppositely enclosing two symmetrical flange connecting bodies (1), wherein a fastening gap is reserved at the enclosed butt joint part of the two flange connecting bodies (1) of the Hafu horn mouth structure (100); the flange connector (1) comprises a guide sleeve part (11), a guide part (12) and a limiting part (13) which are integrally formed, the guide sleeve part (11) is of a half-straight-cylindrical structure, the guide part (12) is of an outward-expanding arc-shaped structure, the limiting part (13) is an inner step which extends inwards along the circumferential direction at the joint of the guide sleeve part (11) and the guide part (12), and flange ear edges (111) extend outwards along the radial direction at two sides of the axial plane of the guide sleeve part (11) respectively; the two flange connection bodies (1) are fixed by fasteners (2) penetrating through the lugs (111) of the adjacent flanges.

2. The detachable huff-bell cable lead-in device according to claim 1, characterized in that a set of fasteners (2) are respectively arranged at the flange ear edges (111) at both sides of the huff-bell structure (100), and each set of fasteners (2) comprises at least two huff fastening bolts.

3. The huff-flared cable lead-in device according to claim 1, wherein the huff tightening clearance is in the range of one tenth of the nominal diameter of the threading catheter (02) or the pre-embedded wall-penetrating tube (01).

4. The detachable huff bell cable lead-in device according to any one of claims 1 to 3, characterized in that the guide sleeves (11) of the two flange connectors (1) are surrounded to form a straight guide sleeve, the straight guide sleeve is sleeved and fixed on the end of the threading guide pipe (02) or the embedded wall penetrating pipe (01), the guide parts (12) of the two flange connectors (1) are surrounded to form a bell, the two limiting parts (13) are surrounded to form an annular inner step, and the radial width of the annular inner step is consistent with the wall thickness of the threading guide pipe (02) or the embedded wall penetrating pipe (01).

5. The detachable huff bell cable lead-in device according to any one of claims 1 to 4, characterized by further comprising a pipe hoop (3), wherein the pipe hoop (3) is a straight pipe with two open ends, the two ends of the pipe hoop (3) are both provided with internal threads, the outer wall of the first end of the pipe hoop (3) is matched with the inner wall of a straight cylinder guide sleeve formed by the surrounding of the guide sleeve parts (11) of the two flange connectors (1), and the radial width of an annular inner step formed by the surrounding of the limiting parts (13) of the two flange connectors (1) is consistent with the pipe wall thickness of the pipe hoop (3); the internal thread of the second end part of the pipe hoop (3) is connected with the external thread of the port part of the threading guide pipe (02) or the embedded wall penetrating pipe (01) in a matching way.

6. A detachable Haff flare cable lead-in device according to claim 5, wherein after the cable is laid in place through the pipe, the fastener (2) is loosened to separate the Haff flare structure (100) from the pipe hoop (3), and the pipe hoop (3) after detaching the Haff flare structure (100) is used for installing the flexible sealing assembly (5).

7. A detachable Haff flare cable lead-in device according to claim 6, wherein the flexible sealing assembly (5) comprises:

a thread adjusting retainer ring (51) which is connected with the pipe hoop (3) in a thread way and is positioned inside the second end part of the pipe hoop (3);

an end locking gland (54) which is matched and connected with the internal thread of the second end of the pipe hoop (3);

the flexible sealing element is sleeved on the cable in a penetrating mode, consists of two half joint sealing retaining rings (52) and a sealing ring group (53) positioned between the two half joint sealing retaining rings (52), is positioned in the pipe hoop (3) between the thread adjusting retaining ring (51) and the end part locking gland (54), and forms static seal with the sealing surfaces of the guide pipe (02) and the cable; each half joint sealing retainer ring (33) is a circular ring structure formed by split butt joint of two halves of circular rings.

8. A cable through-pipe laying construction method, which is implemented based on the detachable Haff flare cable leading-in device of any one of claims 1 to 5, and comprises the following processes:

sleeving guide sleeve parts (11) of two flange connectors (1) on the periphery of the end part of a threading guide pipe (02) or an embedded wall-penetrating pipe (01), fixedly surrounding the two flange connectors (1) together by using a fastener (2) to form a half bell mouth structure (100), matching and fixing the inner wall of a straight cylinder guide sleeve of the half bell mouth structure (100) with the outer wall of the threading guide pipe (02) or the embedded wall-penetrating pipe (01), or matching and fixing the inner wall of a straight cylinder guide sleeve of the half bell mouth structure (100) with the outer wall of one end part of a pipe hoop (3), and screwing the other end part of the pipe hoop (3) on the periphery of the end part of the embedded wall-penetrating pipe (01) or the threading guide pipe (02) to fix;

and (3) passing the cable through the threading guide pipe (02) or the embedded wall penetrating pipe (01) until the cable is laid in place.

9. The cable reeving construction method of claim 8, further comprising:

the detachable Hafu horn mouth cable leading-in device is detached, and a sealing structure (4) is additionally arranged at the port part of a pre-buried wall penetrating pipe (01) or a threading guide pipe (02) under the condition that the cable is not cut off.

10. A cable pipe-through laying construction method, which is based on the detachable huff-bell cable leading-in device of claim 6 or 7, and comprises the following processes:

sleeving guide sleeve parts (11) of two flange connectors (1) on the periphery of a first end part of a pipe hoop (3), fixing and enclosing the two flange connectors (1) together by using a fastener (2) to form a Hough bell mouth structure (100), and matching and fixing the inner wall of a straight cylinder guide sleeve of the Hough bell mouth structure (100) and the outer wall of the first end part of the pipe hoop (3);

screwing the second end part of the pipe hoop (3) internally provided with the thread adjusting check ring (51) on the periphery of the port of the pre-embedded wall-penetrating pipe (01) or the threading guide pipe (02), pre-sleeving a sealing ring group (53) and an end part locking gland (54) on a cable, and laying the cable in place;

detaching the half bell mouth structure (100) from the pipe clamp (3) and reserving the pipe clamp (3); installing two half joint sealing check rings (52) on a cable, enabling a sealing ring group (53) to be located between the two half joint sealing check rings (52), and installing a flexible sealing element formed by the two half joint sealing check rings (52) and the sealing ring group (53) in place;

the flexible sealing elements are sequentially extruded and pushed into the pipe hoop (3) until the flexible sealing elements contact with the thread adjusting retainer ring (51), and then the threaded end of the end part locking gland (54) is screwed into the pipe hoop (3), so that the sealing ring group (53) in the sealed cavity forms enough pre-pressing pre-tightening force, namely the sealing ring group (53) is in a three-way stress state to form static seal.

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