CN115693583A - High-tightness protection box for communication cable - Google Patents
High-tightness protection box for communication cable Download PDFInfo
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- CN115693583A CN115693583A CN202211700977.5A CN202211700977A CN115693583A CN 115693583 A CN115693583 A CN 115693583A CN 202211700977 A CN202211700977 A CN 202211700977A CN 115693583 A CN115693583 A CN 115693583A
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Abstract
The invention provides a high-tightness protection box for a communication cable, which belongs to the technical field of cable installation and comprises the following components: the device comprises a first shell, a second shell, a sealing pipe and reinforcing ribs. The second casing can be dismantled with first casing and be connected, and the second casing is inboard encloses with first casing inboard to be equipped with and holds the chamber. The sealed tube is arranged in the accommodating cavity and is used for being hermetically sleeved on the cable. Strengthening rib one end is connected on first casing, and the other end is connected on the second casing, and the strengthening rib is around establishing on the sealed tube, and the strengthening rib is used for improving the seal between sealed tube and the cable. The reinforcing ribs of the high-tightness protection box for the communication cable are wound around the first shell and the second shell and extruded on the sealing tube, and the sealing tube is subjected to external acting force, so that the acting force between the sealing tube and the cable is improved, the tightness is finally improved, and the long-time stability of the joint is ensured.
Description
Technical Field
The invention belongs to the technical field of cable installation, and particularly relates to a high-tightness protection box for a communication cable.
Background
In a plurality of cables affecting the quality of the mobile communication network, taking an antenna feeder as an example, the reliability of an antenna feeder system accounts for 30% -50% of the reliability of the whole base station system. Antenna feeders are one of the most important components in a communication system. The antenna feeder line functions to convert an electromagnetic wave transmitted in the feeder line into an electromagnetic wave propagating in a free space or convert an electromagnetic wave propagating in a free space into an electromagnetic wave transmitted in the feeder line, and is a transmission path of the electromagnetic wave.
However, the antenna feeder is generally installed outdoors and is easily subjected to wind, rain, collision and the like, so that the connection at the joint of the antenna feeder is loosened and even broken, and poor contact is caused. The antenna feeder is not protected well, and water and dust are easy to enter, so that transmission loss is increased, and sensitivity is reduced. At present, most antenna feeder lines are bound by insulating tapes, so that time and labor are wasted in the installation process, the antenna feeder lines are easily influenced by external environments and the like, and the antenna feeder lines cannot be kept in a closed state for a long time.
Disclosure of Invention
The invention aims to provide a high-tightness protective box for a communication cable, which aims to solve the problems that the joint of the communication cable is easily influenced by the external environment and the tightness cannot be maintained for a long time.
In order to achieve the purpose, the invention adopts the technical scheme that: provided is a highly airtight protective case for a communication cable, comprising:
a first housing;
the second shell is detachably connected with the first shell, and an accommodating cavity is formed by the inner side of the second shell and the inner side of the first shell in a surrounding manner;
the sealing tube is arranged in the accommodating cavity and is used for being sleeved on the cable in a sealing mode;
one end of the reinforcing rib is connected to the first shell, and the other end of the reinforcing rib is connected to the second shell; the strengthening rib is around establishing and extruding on the sealed tube, the strengthening rib is used for improving the seal between sealed tube and the cable.
In a possible implementation manner, the first shell is in threaded connection with the second shell, and the reinforcing rib shrinks and deforms and presses the sealing tube by means of rotation of the first shell relative to the second shell; and a positioning pin is arranged between the first shell and the second shell.
In one possible implementation manner, an inner side surface of the sealing tube is provided with a grounding sheet, and the grounding sheet is used for abutting against the cable joint through the sealing tube; and a lead is connected to the grounding sheet, penetrates through the sealing tube and is electrically connected with the reinforcing rib, and the lead leads out static electricity on the grounding sheet through the reinforcing rib.
In a possible implementation manner, two ends of the reinforcing rib are respectively welded and fixed on the first shell and the second shell.
In one possible implementation, the sealing tube is a piece of flexible material.
In a possible implementation manner, a plurality of protection sheets are arranged along the circumferential direction of the sealing tube, and the protection sheets are arranged between the reinforcing rib and the sealing tube.
In a possible implementation manner, the protection sheets are distributed at two ends of the sealing tube, the end part, far away from the sealing tube, of each protection sheet is provided with an extrusion sheet, and the extrusion sheets have elasticity and abut against the outer side of the joint of the sealing tube by means of the protection sheets.
In one possible embodiment, the protective sheet is bonded to the outer side of the sealing tube.
In a possible implementation manner, the first shell and the end part, far away from the second shell, of the first shell are provided with yielding holes for yielding cables, and sealing rings are arranged in the yielding holes.
In a possible implementation manner, the sealing ring extends from the abdicating hole to the center of the accommodating cavity.
The high-tightness protection box for the communication cable provided by the invention has the beneficial effects that: compared with the prior art, the second shell in the high-tightness protection box for the communication cable is detachably connected to the first shell, the inner side walls of the second shell and the first shell are arranged into accommodating cavities, the sealing pipe is arranged in the accommodating cavities, and the sealing pipe is sleeved on the cable in a sealing mode. One end of the reinforcing rib is connected to the first shell, and the other end of the reinforcing rib is connected to the second shell.
When practical application, because the strengthening rib is around establishing and holding the intracavity to the strengthening rib passes through first casing and second casing extrusion on the sealed tube, thereby because the sealed tube has received the effort of outside effort and has improved the effort between sealed tube and the cable, finally improved the seal, guaranteed to connect long-time stability.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed for the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a highly airtight protection box for a communication cable according to an embodiment of the present invention;
fig. 2 is a partial enlarged view at a in fig. 1.
In the figure: 1. a first housing; 2. a second housing; 3. a protective sheet; 4. a cable; 5. a seal ring; 6. a sealing tube; 7. extruding the sheet; 8. reinforcing ribs; 9. a lead wire; 10. a grounding plate; 11. and a positioning pin.
Detailed Description
In order to make the technical problems, technical solutions and advantageous effects to be solved by the present invention more clearly apparent, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Referring to fig. 1 to 2 together, a highly airtight protective case for a communication cable according to the present invention will now be described. Communication cable high leakproofness protection box includes: the device comprises a first shell 1, a second shell 2, a sealing pipe 6 and a reinforcing rib 8. The second casing 2 can be dismantled with first casing 1 and be connected, and 2 inboard and the 1 inboard of first casing of second casing enclose to be equipped with and hold the chamber. The sealing tube 6 is arranged in the accommodating cavity and is used for being hermetically sleeved on the cable 4. 8 one ends of the reinforcing ribs are connected to the first shell 1, the other ends of the reinforcing ribs are connected to the second shell 2, the reinforcing ribs 8 are wound on the sealing tube 6, and the reinforcing ribs 8 are used for improving the sealing performance between the sealing tube 6 and the cable 4.
The high-tightness protection box for the communication cable provided by the invention has the beneficial effects that: compared with the prior art, the second shell 2 in the high-tightness protection box for the communication cables is detachably connected to the first shell 1, the second shell 2 and the inner side of the first shell 1 are enclosed to form an accommodating cavity, the sealing tube 6 is arranged in the accommodating cavity and is tightly sleeved on the cables 4. One end of the reinforcing rib 8 is connected to the first housing 1, and the other end is connected to the second housing 2.
When practical application, because the strengthening rib 8 is around establishing at holding the intracavity to strengthening rib 8 extrudees on sealed tube 6 through first casing 1 and second casing 2, thereby because sealed tube 6 has received outside effort and has improved the effort between sealed tube 6 and cable 4, has finally improved the seal, has guaranteed to connect long-time stability.
The antenna feeder system of a base station refers to a system in which a base station BTS (base transceiver station) transmits electromagnetic waves loaded with information to an antenna through a feeder and propagates out through the antenna. The antenna functions to convert an electromagnetic wave transmitted in the feeder line into an electromagnetic wave propagating in a free space, or to convert an electromagnetic wave propagating in a free space into an electromagnetic wave transmitted in the feeder line. In the antenna feeder communication system shared by multiple channels, the technical performance and quality index of the antenna feeder directly influence the communication quality of each microwave channel of the shared antenna feeder system. The normal operation of the antenna feeder line can not only enlarge the coverage area, reduce the blind area and improve the coverage rate, but also reduce the interference and reduce the occurrence rate of communication faults such as crosstalk, disconnection and the like.
The most easily occurring problem of a feeder line system is that the connector is poorly sealed and water enters, standing-wave ratio alarm is caused, and normal operation of a base station is influenced. Therefore, the waterproof technology is an important factor which must be considered in the antenna feed system.
An outdoor RRU unit is added on the sky surface of the TD base station, and an RRU and an intelligent antenna form a TD sky surface system together. In the initial stage of TD construction, engineers use a common waterproof tape winding mode to perform waterproof treatment on the RRU feeder line interface. However, in the practical application of the external field, it is found that the RRU needs to be placed outdoors for a long time, and a water inlet phenomenon often occurs at a waterproof tape interface, so that an antenna standing-wave ratio alarm is caused, the coverage effect of a cell is affected, and sometimes even the RRU equipment is damaged. Because each sector of TD has more than 80 places to need to do water repellent treatment, and waterproof sticky tape winding mode maneuverability is relatively poor in addition, causes man-hour greatly increased. How to improve the waterproof treatment process of the antenna feeder interface, enhance the waterproof reliability and simplify the operation difficulty becomes a very important engineering topic.
In some embodiments of the protective box for high tightness of communication cables provided by the present application, please refer to fig. 1 and fig. 2, the first shell 1 is connected with the second shell 2 by screw threads, and the reinforcing rib 8 shrinks and deforms and presses the sealing tube 6 by the rotation of the first shell 1 relative to the second shell 2; a positioning pin 11 is mounted between the first housing 1 and the second housing 2.
When first casing 1 and second casing 2 are not interconnect, strengthening rib 8 is in the state that does not have the shrink, there is certain clearance between strengthening rib 8 and the sealed tube 6 this moment, when needs with sealed tube 6 location on cable 4, need make strengthening rib 8 increase so that can make its internal diameter reduce around establishing the number of turns, and strengthening rib 8 itself can be regarded as the spring and strengthening rib 8 itself has certain structural strength, just need to make first casing 1 move for second casing 2 in order to realize the reduction of strengthening rib 8 internal diameter, and in the in-process of first casing 1 for the motion of second casing 2, the both ends of strengthening rib 8 also need move, thereby can realize the change of strengthening rib 8 self shape.
Based on above-mentioned reason, first casing 1 threaded connection has accomplished first casing 1 and second casing 2's location of being connected along with first casing 1 for the rotation of second casing 2 on the one hand on the second casing 2, and on the other hand can change the internal diameter of strengthening rib 8 to make strengthening rib 8 support and lean on sealed tube 6, because the effect of strengthening rib 8, can improve the effort between sealed tube 6 and cable 4, thereby very big assurance the seal.
In some embodiments of the highly airtight protective box for communication cables provided by the present application, please refer to fig. 1 and 2, an inner side surface of the sealing tube 6 is provided with a grounding strip 10, and the grounding strip 10 is used for abutting against a connector of the cable 4 by means of the sealing tube 6; the grounding plate 10 is connected with a lead 9, the lead 9 penetrates through the sealing tube 6 and is electrically connected with the reinforcing rib 8, and the lead 9 leads static electricity on the grounding plate 10 out through the reinforcing rib 8.
In order to lead out static electricity at a joint, a grounding wire needs to be arranged on the joint before the sealing tube 6 is installed, then the grounding wire is wrapped on the joint through an adhesive tape and the like, finally a communication cable high-tightness protection box shell is fixed on the outer side of the adhesive tape, and for some important occasions, a cold shrinkage tube is sleeved after the adhesive tape is wound. Although the method can ensure the tightness and lead out static electricity within a certain time, a certain gap exists between the grounding wire and the inner wall of the cold shrinkage pipe due to the certain volume of the grounding wire, and impurities inevitably enter the gap between the cold shrinkage pipe and the grounding wire along with the increase of the service time, so that a series of problems of rusting and the like at a joint are finally caused.
In this application, in order to avoid above-mentioned problem, at first be provided with grounding plate 10 on the medial surface of sealed tube 6, grounding plate 10 has certain volume but corresponding thickness is lower, simultaneously because grounding plate 10 sets up the middle part position at sealed tube 6 more, with the help of the confined state of sealed tube 6 with cable 4 to avoid in external impurity gets into sealed tube 6. In order to improve the integration level, the reinforcing ribs 8 are made of conductive materials, a lead 9 is connected to the grounding sheet 10 in order to lead out static electricity on the grounding wire, the lead 9 penetrates through the sealing tube 6 from the grounding sheet 10 to the outside, and the lead 9 is electrically connected with the reinforcing ribs 8. In one embodiment, a connection ring may be provided at the end of the lead 9, the rib 8 penetrates the connection ring, and the lead 9 has a certain expansion and contraction margin, so that the connection state can be maintained even if the shape of the rib 8 is changed.
In some embodiments of the highly airtight protective box for communication cables provided by the present application, please refer to fig. 1, two ends of the stiffener 8 are respectively welded and fixed on the first casing 1 and the second casing 2. Through welded fastening, the joint strength of the reinforcing ribs 8 and the first shell 1 and the joint strength of the reinforcing ribs 8 and the second shell 2 are ensured.
In some embodiments of the highly airtight protective casing for telecommunication cables provided in the present application, please refer to fig. 1, the sealing tube 6 is a flexible material. For ease of installation and connection, the gland 6 is typically a cold shrink tube. In actual installation, both ends of the reinforcing rib 8 are previously attached to the first housing 1 and the second housing 2, but the first housing 1 and the second housing 2 are separated from each other.
In order to expand the cold shrink tube, a plurality of rings of support bars are wound in the cold shrink tube, and after the support bars are drawn out, the cold shrink tube is not restrained externally, so that the cold shrink tube can retract and deform and is finally attached to a target cable. The sealing tube 6 in this application can be regarded as a cold shrink tube, so the inside of the sealing tube 6 is also wound with a supporting bar, and in practical application, the joint is inserted into the accommodating cavity from the bottom of the second shell 2 and is positioned in the sealing tube 6. At this point the brace inside the gland 6 is withdrawn, the gland 6 contracts and wraps the joint. When the stay is completely withdrawn, the second housing 2 is coupled to the first housing 1, and the reinforcing rib 8 abuts against the sealing tube 6 while relatively rotating.
In some embodiments of the protective box for high tightness of communication cables provided by the present application, please refer to fig. 1 and fig. 2, a plurality of protective sheets 3 are disposed along the circumferential direction of the sealing tube 6, and the plurality of protective sheets 3 are disposed between the reinforcing ribs 8 and the sealing tube 6.
In order to facilitate the rotation of the first housing 1 relative to the second housing 2, the reinforcing ribs 8 should not be of a thick specification, but since the sealing tube 6 is made of a flexible material, after the two housings are positioned, the reinforcing ribs 8 exert a certain force on the sealing tube 6, the force can cause the sealing tube 6 to be sunken and deformed, and the sealing tube 6 can be plastically deformed over time, so that the service life of the sealing tube 6 is affected.
In order to solve the above problem, a plurality of protection sheets 3 are fixed to the sealing tube 6 before the first and second housings 1 and 2 are mounted, and the protection sheets 3 have a certain structural strength. The number of protection pieces 3 is a plurality of, and a plurality of protection pieces 3 are evenly arranged along the circumference of sealing tube 6. After 8 shrink deformations of strengthening rib, can lean on a plurality of protection pieces 3, thereby extrude sealed tube 6 through a plurality of protection pieces 3, finally guaranteed sealed tube 6's tightness.
In some embodiments of the protective box for high tightness of communication cables provided by the present application, please refer to fig. 1 and fig. 2, a plurality of protective sheets 3 are distributed at two ends of a sealing tube 6, and an end of each protective sheet 3 away from the sealing tube 6 is provided with a pressing sheet 7, and the pressing sheet 7 has elasticity and abuts against the outer side of the joint of the sealing tube 6 by means of the protective sheets 3.
The quantity of protection piece 3 is a plurality of, and a plurality of protection pieces 3 mainly set up at the both ends of sealed tube 6, and a plurality of protection pieces 3 can be extruded simultaneously to strengthening rib 8 to comparatively comprehensive messenger sealed tube 6 is airtight to lean on cable 4. Normally, the inner side of the middle part of the sealing tube 6 is a joint of the cable 4, the outer diameter of the joint is larger than that of the cable 4, so that the sealing tube 6 has larger deformation at the joint and smaller thickness. In order to improve the acting force between the joint of the sealing tube 6 and the joint and ensure tightness, a squeezing sheet 7 is arranged on one side of the protection sheet 3, and the squeezing sheet 7 is a flexible material part. The protection sheet 3 drives the extrusion sheet 7 to extrude the joint of the sealing tube 6, thereby avoiding the entering of external impurities and the like.
In some embodiments of the protective casing for high tightness of communication cables provided by the present application, please refer to fig. 1 and 2, the protective sheet 3 is adhered on the outer side surface of the sealing tube 6. During the process of the movement of the first housing 1 relative to the second housing 2, the reinforcing ribs 8 are deformed all the time, and if there is no any limiting measure between the protection plate 3 and the sealing tube 6, the position of the protection plate 3 relative to the sealing tube 6 is easily changed under the action of the reinforcing ribs 8.
However, if a large amount of glue is applied between the protective sheet 3 and the sealing tube 6, the normal deformation of the sealing tube 6 is hampered by the presence of the protective sheet 3. If the protection sheet 3 is subsequently installed and the reinforcing rib 8, the first housing 1 and the second housing 2 are arranged outside the sealing tube 6, it is very difficult to install the protection sheet 3 through the reinforcing rib 8. For this purpose, the protection sheet 3 is fixed on the sealing tube 6 by means of dispensing, i.e. there are a plurality of glue-fixing points between the protection sheet 3 and the sealing tube 6.
In some embodiments of the highly-airtight protection box for communication cables provided by the present application, please refer to fig. 1 and fig. 2, the end portions of the first casing 1 and the second casing 2 away from each other are both provided with a yielding hole for yielding the cable 4, and a sealing ring 5 is arranged in the yielding hole. Due to the flange and the thread sleeve, the sealing tube 6 may be deformed largely at the joint after the support bar is extracted, for example, the joint may be formed at the joint, and the cold shrink tube may be deformed at the edge of the joint after the support bar is extracted.
More importantly, because of the existence of the joint, the outer diameter of the joint is larger than that of the cable 4, the existing method sets the high-tightness protection box of the communication cable as an upper shell and a lower shell, the upper shell and the lower shell are distributed and wrapped in a range of 180 degrees, and after the upper shell and the lower shell are buckled, the installation is completed. In order to realize the protection that connects in this application, all seted up the hole of stepping down at the tip that last casing and lower casing kept away from, the internal diameter in hole of stepping down is great to be convenient for pass of joint.
In order to ensure the sealing performance, a sealing ring 5 is arranged in the receding hole, and a gap between the shell and the cable 4 is sealed by the sealing ring 5.
In some embodiments of the highly airtight protective casing for telecommunication cables provided in the present application, please refer to fig. 1, the sealing ring 5 extends from the receding hole to the center of the accommodating cavity. If the sealing ring 5 is of a circular ring structure, a gap is easily formed between the sealing ring 5 and the cable 4 as the service time increases and the external environment temperature changes, so that the sealing fails.
In order to solve the above problem, the seal ring 5 on the first casing 1 and the seal ring 5 on the second casing 2 extend from the abdicating hole to the center of the accommodating cavity, and the seal ring 5 can lead the cable 4 joint to pass through. After the two shells are installed, the side edge of the sealing ring 5 far away from the abdicating hole can abut against the cable 4, so that the gap is blocked. At this time, even if the external environment changes, the seal ring 5 always abuts against the cable 4. More importantly, under the action of the sealing ring 5, acting force can be applied to the cables 4 on two sides of the joint, and the acting force can enable the two cables 4 to be close to each other, so that the stability of the joint is ensured. Also sealing washer 5 in this application is loudspeaker column structure, and two sealing washers 5 set up relatively to the macrostoma end is fixed on the hole of stepping down, and the osculum end supports and leans on cable 4.
The present invention is not limited to the above preferred embodiments, and any modifications, equivalents and improvements made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. High leakproofness protection box of communication cable, its characterized in that includes:
a first housing;
the second shell is detachably connected with the first shell, and an accommodating cavity is formed by the inner side of the second shell and the inner side of the first shell in a surrounding manner;
the sealing tube is arranged in the accommodating cavity and is used for being hermetically sleeved on the cable;
one end of the reinforcing rib is connected to the first shell, and the other end of the reinforcing rib is connected to the second shell; the reinforcing rib is wound and extruded on the sealing tube, and the reinforcing rib is used for improving the tightness between the sealing tube and the cable.
2. The highly airtight protective case for communication cable according to claim 1, wherein said first casing is screw-coupled to said second casing, and said reinforcing rib is deformed by rotational contraction of said first casing with respect to said second casing and presses said sealing tube; and a positioning pin is arranged between the first shell and the second shell.
3. The highly airtight protective case for communication cable according to claim 1, wherein the inner side of said sealing tube is provided with a grounding plate, said grounding plate is used to abut against the cable connector by means of said sealing tube; and a lead is connected to the grounding sheet, penetrates through the sealing tube and is electrically connected with the reinforcing rib, and the lead leads out static electricity on the grounding sheet through the reinforcing rib.
4. The highly airtight protective case for communication cable according to claim 1, wherein both ends of said reinforcing rib are welded and fixed to said first casing and said second casing, respectively.
5. The highly airtight protective case for communication cable according to claim 1, wherein said sealing tube is made of flexible material.
6. The highly airtight protective case for communication cable according to claim 1, wherein a plurality of protective sheets are provided along the circumferential direction of said sealing tube, and a plurality of said protective sheets are provided between said reinforcing rib and said sealing tube.
7. The protective casing for high tightness of communication cables as claimed in claim 6, wherein a plurality of said protective sheets are distributed at both ends of said sealing tube, and the end of said protective sheet far from said sealing tube is provided with a pressing sheet, said pressing sheet is elastic and is abutted against the outer side of the joint of said sealing tube by said protective sheet.
8. The highly airtight protective case for communication cable according to claim 6, wherein said protective sheet is bonded to the outer side surface of said sealing tube.
9. The highly-airtight protective box for communication cables as claimed in claim 1, wherein the ends of the first shell and the second shell which are far away from each other are provided with a yielding hole for yielding the cables, and a sealing ring is arranged in the yielding hole.
10. The protective case for high tightness of communication cables according to claim 9, wherein said sealing ring extends from said avoiding hole to the center of said containing cavity.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211700977.5A CN115693583B (en) | 2022-12-29 | 2022-12-29 | High-tightness protection box for communication cable |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211700977.5A CN115693583B (en) | 2022-12-29 | 2022-12-29 | High-tightness protection box for communication cable |
Publications (2)
| Publication Number | Publication Date |
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| CN115693583A true CN115693583A (en) | 2023-02-03 |
| CN115693583B CN115693583B (en) | 2023-03-21 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202211700977.5A Active CN115693583B (en) | 2022-12-29 | 2022-12-29 | High-tightness protection box for communication cable |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010164184A (en) * | 2009-01-19 | 2010-07-29 | Nippon Soken Inc | Seal structure |
| CN201594579U (en) * | 2010-01-15 | 2010-09-29 | 北京阳光天成科技发展有限公司 | Antenna feeder connector protecting box |
| CN204441848U (en) * | 2015-01-11 | 2015-07-01 | 鲁冠华 | A kind of safety cable connector box |
| CN206332401U (en) * | 2016-12-28 | 2017-07-14 | 普天信息工程设计服务有限公司 | Communicate protection for feed line box |
| CN209876246U (en) * | 2019-04-23 | 2019-12-31 | 惠州和创智造科技有限公司 | Oil filler joint for fuel tank sealing test |
| CN211930222U (en) * | 2020-05-08 | 2020-11-13 | 张大为 | River-crossing cable protection device for electric power transmission |
| CN212366310U (en) * | 2020-06-08 | 2021-01-15 | 深圳市海联通科技有限公司 | Communication engineering communication cable connecting terminal protection device |
-
2022
- 2022-12-29 CN CN202211700977.5A patent/CN115693583B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010164184A (en) * | 2009-01-19 | 2010-07-29 | Nippon Soken Inc | Seal structure |
| CN201594579U (en) * | 2010-01-15 | 2010-09-29 | 北京阳光天成科技发展有限公司 | Antenna feeder connector protecting box |
| CN204441848U (en) * | 2015-01-11 | 2015-07-01 | 鲁冠华 | A kind of safety cable connector box |
| CN206332401U (en) * | 2016-12-28 | 2017-07-14 | 普天信息工程设计服务有限公司 | Communicate protection for feed line box |
| CN209876246U (en) * | 2019-04-23 | 2019-12-31 | 惠州和创智造科技有限公司 | Oil filler joint for fuel tank sealing test |
| CN211930222U (en) * | 2020-05-08 | 2020-11-13 | 张大为 | River-crossing cable protection device for electric power transmission |
| CN212366310U (en) * | 2020-06-08 | 2021-01-15 | 深圳市海联通科技有限公司 | Communication engineering communication cable connecting terminal protection device |
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|---|---|
| CN115693583B (en) | 2023-03-21 |
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