CN110474286B

CN110474286B - Variable connection box for coaxial cable inlet wire

Info

Publication number: CN110474286B
Application number: CN201910875538.XA
Authority: CN
Inventors: 陈腾彪
Original assignee: Shenzhen Power Supply Bureau Co Ltd
Current assignee: Shenzhen Power Supply Bureau Co Ltd
Priority date: 2019-09-17
Filing date: 2019-09-17
Publication date: 2020-11-06
Anticipated expiration: 2039-09-17
Also published as: CN110474286A

Abstract

The application relates to a variable connection box for coaxial cable inlet wires. The variable connection box of the coaxial cable inlet wire comprises a box body, a first connection device row, a second connection device row, a beam splitting ring and a grounding connection device. According to the requirement of power transmission engineering, a cross interconnection structure or a direct grounding structure can be formed between the plurality of first connecting devices and the plurality of second connecting devices. Since each first connecting device comprises a first fixed seat. The first fixing seat is further provided with first connecting holes, and each first connecting hole is used for being electrically connected with a second downstream cable metal sheath through a single-core cable. The first downstream cable metal sheath can be directly electrically connected with the second downstream cable metal sheath, so that the electrical connection requirement between the branched downstream cable metal sheaths is met. A variable connecting box for coaxial cable inlet wire provides basic coupling assembling, and operating personnel changes to connect the adjustment according to the demand, uses in the variable connecting box of coaxial cable inlet wire to be applied to different transmission of electricity structures.

Description

Variable connection box for coaxial cable inlet wire

Technical Field

The application relates to the technical field of electric power, especially relate to a variable connecting box for coaxial cable inlet wire.

Background

The urban power grid generally adopts high-voltage single-core cables to transmit power, when a cable core has current, an induced voltage is generated on a cable metal sheath, and the larger the cable load is, the longer the line is, and the higher the induced voltage is. If the three-phase cable loop is completely symmetrical and the current in the three-phase loop is also completely symmetrical, the voltages induced in the aluminum sheath of the three-phase cable are completely symmetrical, and the vector sum of the voltages is zero.

By utilizing the principle, the three-phase metal sheath cross connection is arranged at the joint position of a longer cable line, and the induction voltage of the whole cross interconnection section is smaller through twice cross connection. In a power transmission project, a power shunt phenomenon occurs. Such as one upstream power transmission cable electrically connected to two downstream power transmission cables. However, the existing cross interconnection grounding box has a unique wiring mode and cannot be subjected to wiring adjustment as required.

Disclosure of Invention

Therefore, the variable connection box for the coaxial cable inlet wire is needed to be provided aiming at the problems that the existing cross interconnection grounding box has a unique wiring mode and cannot perform wiring adjustment according to requirements.

A variable connection box for coaxial cable inlet wires. The coaxial cable includes an inner core for electrically connecting to an upstream cable metal sheath and an outer core for electrically connecting to a first downstream cable metal sheath. The variable connection box for the coaxial cable inlet wire comprises a box body, a first connection device row, a second connection device row, a beam splitting ring and a grounding connection device.

The box body is enclosed to form a first space. The first connecting device row is received in the first space. The first connecting device array comprises a plurality of first connecting devices which are arranged at intervals, and each first connecting device comprises a first fixed seat. The first fixing seat is arranged in the first space. First fixing base includes first connecting hole and the boss that the interval set up. The boss is provided with a second connecting hole, and the openings of the first connecting hole and the second connecting hole face the side wall of the box body. Each first connection hole is used for being electrically connected with a second downstream cable metal sheath through a single core cable.

The second connecting device row is accommodated in the first space. The first connecting device row and the second connecting device row are arranged in parallel at intervals. The second connecting device row is arranged on one side, far away from the lug boss, of the first connecting device row. The second connection means column comprises a plurality of second connection means. The plurality of second connecting devices and the plurality of first connecting devices are arranged in one-to-one correspondence. The second connecting means comprises a third connecting hole. The third connecting holes are opposite to the corresponding second connecting holes.

The beam splitting ring is sleeved on the boss, and a first gap is formed between the outer surface of the boss and the inner ring surface of the beam splitting ring. The first gap is used for receiving the outer core of the coaxial cable so as to enable the outer core of the coaxial cable to be electrically connected with the first connecting device. The inner core of the coaxial cable passes through the first gap and the second connecting hole. And the inner core of the coaxial cable is clamped in the third connecting hole so as to ensure that the inner core of the coaxial cable is electrically connected with the second connecting device.

The ground connection device is accommodated in the first space. The grounding connecting device is arranged on one side of the second connecting device row far away from the first connecting device row.

In one embodiment, the variable connection box for the coaxial cable inlet wire further comprises a first connection plate and a plurality of insulators.

The first connecting plate is received in the first space. The grounding connection device is arranged on the first connection plate and electrically connected with the first connection plate.

The plurality of insulators are accommodated in the first space. The insulators are respectively and fixedly connected between the first connecting plate and the bottom surface of the box body.

In one embodiment, the variable connection box for coaxial cable inlet line further comprises a first insulation plate. The first insulating plate is accommodated in the first space and fixed to the case. The plurality of first connecting devices are respectively fixed on the first insulating plate.

In one embodiment, the variable connection box for coaxial cable inlet line further comprises a second insulating plate. The second insulating plate is accommodated in the first space and fixed to the case. The plurality of second connecting devices are respectively fixed on the second insulating plates.

In one embodiment, the first fixing seat is provided with a first bolt hole, the first bolt hole is communicated with the first connecting hole, and the first connecting device further comprises a first sliding block and a first fastening bolt. The first slider is arranged in the first connecting hole. The first fastening bolt is screwed into the first bolt hole. The first fastening bolt is abutted against the first sliding block and used for pushing the first sliding block to tightly press the joint of the single-core cable.

In one embodiment, the box includes a first sidewall and the box includes a plurality of first patch tubes. The plurality of first wire connecting pipes are respectively fixed on the first side wall and communicated with the first space. The first wire connecting tubes and the first connecting devices are arranged in one-to-one correspondence. An orifice of one of the first tubes faces one of the first gaps, and the coaxial cable passes through the first tube.

In one embodiment, the box includes a second sidewall disposed opposite the first sidewall, the box including a plurality of second wire barrels. The plurality of second wire connecting pipes are respectively fixed to the second side wall, and are communicated with the first space. The pipe orifice of each second wiring pipe is arranged corresponding to the first connecting hole. The single-core cable penetrates through the second wiring tube and is clamped in the first connecting hole.

In one embodiment, the plurality of second connecting means are electrically connected to the ground connecting means, respectively.

In one embodiment, the plurality of first connection means includes first phase first connection means, second phase first connection means, and third phase first connection means, the plurality of second connection means includes first phase second connection means, second phase second connection means, and third phase second connection means, the first phase first connection means and the third phase second connection means, the second phase first connection means and the first phase second connection means, and the third phase first connection means and the second phase second connection means.

In one embodiment, the variable connection box for coaxial cable incoming lines further comprises a plurality of protection devices. The plurality of protection devices are respectively arranged on the surfaces, far away from the plurality of insulators, of the first connecting plate, and the plurality of protection devices and the plurality of second connecting devices are arranged in a one-to-one correspondence mode.

In one embodiment, the variable connection box for coaxial cable inlet wires further comprises a cover body. The cover body and the box body jointly enclose to form the first space.

The variable connecting box for the coaxial cable inlet wire provided by the embodiment of the application comprises a box body, a first connecting device column, a second connecting device column, a beam splitting ring and a grounding connecting device. The coaxial cable includes an inner core for electrically connecting to an upstream cable metal sheath and an outer core for electrically connecting to a first downstream cable metal sheath. The first array of connection means comprises a plurality of first connection means. The plurality of first connecting devices are arranged at intervals. The first connecting device row and the second connecting device row are arranged in parallel at intervals. The second connecting device row is arranged on one side, far away from the lug boss, of the first connecting device row. The second connection means column comprises a plurality of second connection means. The plurality of second connecting devices and the plurality of first connecting devices are arranged in one-to-one correspondence.

The beam splitting ring is sleeved on the boss. And the outer surface of the boss and the inner ring surface of the beam splitting ring form a first gap. The first gap is used for receiving the outer core of the coaxial cable so as to enable the outer core of the coaxial cable to be electrically connected with the first connecting device. The inner core of the coaxial cable penetrates through the first gap and the second connecting hole and is clamped in the third connecting hole, so that the inner core of the coaxial cable is electrically connected with the second connecting device. The ground connection device is accommodated in the first space. The grounding connecting device is arranged on one side of the second connecting device row far away from the first connecting device row. The grounding connecting device is used for being connected with a grounding cable.

According to the requirement of power transmission engineering, a cross interconnection structure or a direct grounding structure can be formed between the plurality of first connecting devices and the plurality of second connecting devices. Since each of the first connecting means comprises a first fixed seat. The first fixing seat is further provided with first connecting holes, and each first connecting hole is used for being electrically connected with a second downstream cable metal sheath through a single-core cable. The first downstream cable metal sheath can be directly electrically connected with the second downstream cable metal sheath, so that the electrical connection requirement between the branched downstream cable metal sheaths is met. A variable connecting box for coaxial cable inlet wire provides basic coupling assembling, and operating personnel changes to connect the adjustment according to the demand, makes a variable connecting box for coaxial cable inlet wire is applied to different transmission of electricity structures.

Drawings

Fig. 1 is an exploded view of the structure of the variable connection box for coaxial cable incoming line provided in an embodiment of the present application;

fig. 2 is an internal structure view of the variable connection box for coaxial cable incoming provided in an embodiment of the present application;

FIG. 3 is an exploded view of the first connecting means and the split ring as provided in another embodiment of the present application;

FIG. 4 is an assembled block diagram of the first connecting means and the split ring provided in another embodiment of the present application;

fig. 5 is a structural diagram of the variable connection box for coaxial cable incoming lines provided in another embodiment of the present application;

fig. 6 is a structural diagram of the variable connection box for coaxial cable incoming lines provided in another embodiment of the present application.

Reference numerals:

variable junction box 10

Coaxial cable 100

Inner core 110

Outer core 120

Case 20

First space 201

First side wall 202

Second side wall 203

Cover 204

Handle 205

Sealing ring 206

First wire barrel 210

Second wire barrel 220

First connecting means row 30

First connecting device 310

First connection hole 301

Boss 302

Second connection hole 303

Single core cable 300

First fixing seat 311

First bolt hole 312

First slider 313

First fastening bolt 314

First insulating plate 320

Second connecting means row 40

Second connecting device 410

Third connection hole 401

Second insulating plate 420

Beam splitting ring 50

First gap 501

Ground connection device 60

First connection plate 610

Insulator 620

Protection device 630

First phase first connecting device A₁

Second phase first connecting device B₁

Third phase first connecting means C₁

First phase second connecting device A₂

Second phase second connecting device B₂

Third phase second connecting means C₂

Detailed Description

In order to make the aforementioned objects, features and advantages of the present application more comprehensible, embodiments accompanying the present application are described in detail below with reference to the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application. This application is capable of embodiments in many different forms than those described herein and those skilled in the art will be able to make similar modifications without departing from the spirit of the application and it is therefore not intended to be limited to the embodiments disclosed below.

The numbering of the components as such, e.g., "first", "second", etc., is used herein only to distinguish the objects as described, and does not have any sequential or technical meaning. The term "connected" and "coupled" when used in this application, unless otherwise indicated, includes both direct and indirect connections (couplings). In the description of the present application, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are used only for convenience in describing the present application and for simplicity in description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, are not to be considered as limiting the present application.

In this application, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through intervening media. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

Referring to fig. 1 and 2, the present embodiment provides a variable connection box 10 for coaxial cable incoming lines. The coaxial cable 100 includes an inner core 110 and an outer core 120, one of the inner core 110 for electrical connection with an upstream cable metal sheath and one of the outer core 120 for electrical connection with a first downstream cable metal sheath.

The variable connection box 10 for coaxial cable incoming lines includes a box body 20, a first connection device array 30, a second connection device array 40, a beam splitting ring 50 and a ground connection device 60.

Referring to fig. 3, the box 20 defines a first space 201. The first row of connecting means 30 is received in the first space 201. The first connecting device array 30 includes a plurality of first connecting devices 310, the plurality of first connecting devices 310 are arranged at intervals, and each first connecting device 310 includes a first fixing seat 311. The first fixing seat 311 is disposed in the first space 201. The first fixing seat 311 includes a first connection hole 301 and a boss 302 arranged at an interval. The boss 302 is opened with a second connection hole 303, and the openings of the first connection hole 301 and the second connection hole 303 face the side wall of the box body 20. Each of the first connection holes 301 is used for electrically connecting with a second downstream cable metal sheath through a single core cable 300.

The second connecting device row 40 is received in the first space 201. The first connecting means row 30 is arranged parallel to and spaced apart from the second connecting means row 40. The second row of connecting means 40 is arranged on the side of the first row of connecting means 30 remote from the boss 302. The second connecting means column 40 comprises a plurality of second connecting means 410. The plurality of second connection devices 410 are disposed in one-to-one correspondence with the plurality of first connection devices 310. The second connecting means 410 comprises a third connecting hole 401. The third connection hole 401 is disposed opposite to the corresponding second connection hole 303.

The beam splitting ring 50 is sleeved on the boss 302, and a first gap 501 is formed between the outer surface of the boss 302 and the inner ring surface of the beam splitting ring 50. The first gap 501 is used for receiving the outer core 120 of the coaxial cable 100, so as to electrically connect the outer core 120 of the coaxial cable 100 and the first connecting device 310. The inner core 110 of the coaxial cable 100 passes through the first gap 501 and the second connection hole 303. The inner core 110 of the coaxial cable 100 is snapped into the third connection hole 401, so that the inner core 110 of the coaxial cable 100 is electrically connected to the second connection device 410.

The ground connecting device 60 is received in the first space 201. The ground connection means 60 is arranged on a side of the second connection means row 40 remote from the first connection means row 30.

The variable connection box 10 for a coaxial cable inlet comprises the plurality of first connection means 310 and the plurality of second connection means 410. According to the requirement of power transmission engineering, the plurality of first connection devices 310 and the plurality of second connection devices 410 may form a cross-connection structure or a direct grounding structure therebetween. Since each of the first connecting devices 310 includes the first fixing seat 311. The first fixing base 311 is further provided with first connection holes 301, and each first connection hole 301 is used for being electrically connected with a second downstream cable metal sheath through a single-core cable 300. The splitter ring 50 electrically connects the outer core 120 of the coaxial cable 100 with the first connection device 310. Meanwhile, the inner core 110 of the coaxial cable 100 passes through the first gap 501 and the second connection hole 303. The inner core 110 of the coaxial cable 100 is snapped into the third connection hole 401, so that the inner core 110 of the coaxial cable 100 is electrically connected to the second connection device 410. Through the first fixing seat 311, the first downstream cable metal sheath can be directly electrically connected with the second downstream cable metal sheath, so as to meet the electrical connection requirement between the branched downstream cable metal sheaths. The upstream cable metal sheath can be directly grounded by the splitter ring 50. A variable connecting box 10 for coaxial cable inlet wire provides basic coupling assembling, and operating personnel changes to connect the adjustment according to the demand, makes a variable connecting box 10 for coaxial cable inlet wire is applied to different transmission structures.

Referring to fig. 3 and fig. 4, the beam splitting ring 50 is sleeved on the outer wall of the boss 302. A first gap 501 is formed between the splitter ring 50 and the outer wall of the boss 302. The outer core 120 of the coaxial cable 100 penetrates into the first gap 501 and is attached to the outer surface of the boss 302, so as to ensure that the outer core 120 of the coaxial cable 100 is electrically connected with the first connecting device 310 well.

In one embodiment, the inner core 110 of the coaxial cable 100 is adapted to be electrically connected to a first lower cable metal sheath. The outer core 120 is used to electrically connect to an upstream cable metal sheath.

In one embodiment, the variable connection box 10 for a coaxial cable inlet wire further includes a first connection plate 610 and a plurality of insulators 620. The first connecting plate 610 is received in the first space 201. The ground connecting device 60 is disposed on the first connecting plate 610, and the ground connecting device 60 is electrically connected to the first connecting plate 610. The plurality of insulators 620 are accommodated in the first space 201. The insulators 620 are respectively and fixedly connected between the first connecting plate 610 and the box body 20, so that the box body 20 is prevented from being electrified, and the safety of the variable connection box 10 for the coaxial cable inlet wire is improved.

In one embodiment, the variable connection box for coaxial cable inlet 10 further comprises a first insulation plate 320. The first insulating plate 320 is received in the first space 201 and fixed to the case 20. The first connecting devices 310 are respectively fixed to the first insulating plate 320 to ensure insulation between the first connecting devices 310.

In one embodiment, the variable connection box for coaxial cable inlet 10 further comprises a second insulating plate 420. The second insulating plate 420 is accommodated in the first space 201 and fixed to the case 20. The second connecting means 410 are fixed to the second insulating plate 420, respectively, to ensure insulation between the second connecting means 410.

In one embodiment, the first fixing seat 311 is provided with a first bolt hole 312, the first bolt hole 312 is communicated with the first connection hole 301, and the first connection device 310 further includes a first slider 313 and a first fastening bolt 314. The first slider 313 is disposed in the first connection hole 301. The first fastening bolt 314 is screwed into the first bolt hole 312. The first fastening bolt 314 is pressed against the first sliding block 313 and used for pushing the first sliding block 313 to press the joint of the single core cable 300.

In one embodiment, the housing 20 includes a first sidewall 202 and the housing 20 includes a plurality of first wire barrels 210. The plurality of first wire pipes 210 are fixed to the first side wall 202, respectively, and the plurality of first wire pipes 210 communicate with the first space 201. The plurality of first wire connecting tubes 210 are arranged in one-to-one correspondence with the plurality of first connecting means 310. An orifice of one of the first tubes 210 faces one of the first gaps 501, and the coaxial cable 100 passes through the first tube 210.

In one embodiment, the box 20 includes a second sidewall 203, the second sidewall 203 being disposed opposite the first sidewall 202, and the box 20 includes a plurality of second wire conduits 220. The plurality of second wire tubes 220 are fixed to the second side walls 203, respectively, and the plurality of second wire tubes 220 communicate with the first space 201. The mouths of each of the plurality of second wire barrel 220 are disposed in correspondence with one of the first connection apertures 301. The single core cable 300 passes through one of the second wire connecting tubes 220 to be clamped in the first connecting hole 301.

In one embodiment, the plurality of second connecting means 410 are electrically connected to the ground connecting means 60, respectively.

Referring to fig. 5, in one embodiment, the plurality of first connecting means 310 includes a first phase first connecting means a₁A second phase first connecting device B₁And a third phase first connecting means C₁The plurality of second connecting means includes a first phase second connecting means A₂A second phase second connecting device B₂And a third phase second connecting means C₂Said first phase first connecting means A₁And a second connecting device C of the third phase₂Said second phase first connecting means B₁Second connecting means A with said first phase₂Said third phase first connecting means C₁Second connecting means B with said second phase₂。

In the above embodiment, the plurality of first connecting means 310 and the plurality of second connecting means 410 are interconnected with each other in a crossing manner.

In the above embodiment, the first connection hole 301 is left free and is not electrically connected to the cable metal sheath. The variable connection box 10 for a coaxial cable inlet wire can realize a simple cross interconnection structure.

Referring also to fig. 6, in one embodiment, the first connecting means a is a first phase₁Second connecting means A with said first phase₂Said second phase first connecting means B₁Second connecting means B with said second phase₂Said third phase first connecting means C₁And a second connecting device C of the third phase₂。

The boss 302 is electrically connected to the outer core 120 of the coaxial cable 100. The inner core 110 is correspondingly connected with the second connecting device 410. The plurality of second connecting means 410 are electrically connected with the ground connecting means 60. The first connection hole 301 is electrically connected to a second upstream cable metal sheath (third downstream cable metal sheath) through a single core cable to realize branch connection.

In one embodiment, the variable connection box 10 for coaxial cable incoming lines further comprises a plurality of protection devices 630. The plurality of protection devices 630 are respectively disposed on the surface of the first connection plate 610 away from the plurality of insulators 620, and the plurality of protection devices 630 and the plurality of second connection devices 410 are disposed in a one-to-one correspondence.

In one embodiment, the variable connection box 10 for coaxial cable inlet further comprises a cover 204. The cover 204 and the box body 20 together form the first space 201.

In one embodiment, the housing 20 includes an opening with a flange structure disposed at the opening. The flange structure is provided with a plurality of bolt holes. The cover 204 is correspondingly provided with a plurality of threaded holes. The cover 204 is fixed to the case 20 by a plurality of bolts screwed into the corresponding bolt holes.

In one embodiment, the monocable grounding device 10 further comprises a sealing ring 206. A sealing groove is formed in an opening end face of the box body 20, and the sealing ring 206 is disposed in the sealing groove to seal a gap between the box body 20 and the cover body 204.

In one embodiment, the single core cable grounding device 10 further comprises a handle 205, and the handle 205 is disposed on the surface of the cover 204 away from the box body 20, so as to facilitate taking and placing of the single core cable grounding device 10.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-described examples merely represent several embodiments of the present application and are not to be construed as limiting the scope of the claims. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, which falls within the scope of protection of the present application. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims

1. A variable connection box for coaxial cable incoming lines, said coaxial cable (100) comprising an inner core (110) and an outer core (120), one said inner core (110) for electrical connection with an upstream cable metal sheath and one said outer core (120) for electrical connection with a first downstream cable metal sheath, characterized in that said variable connection box (10) for coaxial cable incoming lines comprises:

a box body (20) which forms a first space (201) in a surrounding way;

a first array of connection devices (30) received in the first space (201), the first array of connection devices (30) including a plurality of first connection devices (310), the plurality of first connection devices (310) being spaced apart, each of the first connection devices (310) including:

the first fixing seat (311) is arranged in the first space (201), the first fixing seat (311) comprises a first connecting hole (301) and a boss (302) which are arranged at intervals, the boss (302) is provided with a second connecting hole (303), the openings of the first connecting hole (301) and the second connecting hole (303) face the side wall of the box body (20), and each first connecting hole (301) is used for being electrically connected with a second downstream cable metal sheath through a single-core cable (300);

a second connecting device row (40) received in the first space (201), wherein the first connecting device row (30) and the second connecting device row (40) are arranged in parallel at intervals, the second connecting device row (40) is arranged on one side, away from the boss (302), of the first connecting device row (30), the second connecting device row (40) comprises a plurality of second connecting devices (410), the second connecting devices (410) and the first connecting devices (310) are arranged in a one-to-one correspondence manner, the second connecting devices (410) comprise third connecting holes (401), and the third connecting holes (401) are arranged opposite to the corresponding second connecting holes (303);

the bundling ring (50) is sleeved on the boss (302), a first gap (501) is formed between the outer surface of the boss (302) and the inner ring surface of the bundling ring (50), the first gap (501) is used for receiving the outer core (120) of the coaxial cable (100) so that the outer core (120) of the coaxial cable (100) is electrically connected with the first connecting device (310), the inner core (110) of the coaxial cable (100) penetrates through the first gap (501) and the second connecting hole (303), and the inner core (110) of the coaxial cable (100) is clamped in the third connecting hole (401) so that the inner core (110) of the coaxial cable (100) is electrically connected with the second connecting device (410);

and the grounding connecting device (60) is accommodated in the first space (201), and the grounding connecting device (60) is arranged on one side, away from the first connecting device row (30), of the second connecting device row (40).

2. The variable connection box for a coaxial cable inlet of claim 1, further comprising:

a first connection plate (610) received in the first space (201), the ground connection device (60) being disposed on the first connection plate (610), and the ground connection device (60) being electrically connected to the first connection plate (610);

and a plurality of insulators (620) accommodated in the first space (201) and respectively fixedly connected between the first connection plate (610) and the bottom surface of the case (20).

3. The variable connection box for a coaxial cable inlet of claim 1, further comprising:

and a first insulation plate (320) received in the first space (201) and fixed to an inner wall of the case (20), wherein the plurality of first connection devices (310) are fixed to the first insulation plate (320), respectively.

4. The variable connection box for a coaxial cable inlet of claim 1, further comprising:

and a second insulating plate (420) which is accommodated in the first space (201) and fixed to an inner wall of the case (20), wherein the plurality of second connecting means (410) are fixed to the second insulating plate (420), respectively.

5. The variable junction box for coaxial cable entries according to claim 3, wherein said first fixed seat (311) is opened with a first bolt hole (312), said first bolt hole (312) being through-connected with said first connection hole (301), said first connection means (310) further comprising:

a first slider (313) provided to the first connection hole (301);

the first fastening bolt (314) is screwed into the first bolt hole (312), and the first fastening bolt (314) is pressed against the first sliding block (313) and used for pushing the first sliding block (313) to press the joint of the single-core cable (300).

6. The variable connection box for coaxial cable entries of claim 1, characterized in that said box (20) comprises a first side wall (202), said box (20) comprising:

a plurality of first wire barrel (210), a plurality of first wire barrel (210) are fixed in respectively first lateral wall (202), just a plurality of first wire barrel (210) with first space (201) intercommunication, a plurality of first wire barrel (210) with a plurality of first connecting device (310) one-to-one sets up, one the mouth of pipe of first wire barrel (210) is just to one first clearance (501), coaxial cable (100) pass first wire barrel (210).

7. Variable connection box for coaxial cable entries according to claim 6, characterized in that said box body (20) comprises a second side wall (203), said second side wall (203) being arranged opposite to said first side wall (202), said box body (20) comprising:

a plurality of second wire barrel (220), a plurality of second wire barrel (220) are fixed in respectively second lateral wall (203), just a plurality of second wire barrel (220) with first space (201) intercommunication, each the mouth of pipe and one of a plurality of second wire barrel (220) first connecting hole (301) correspond the setting, single core cable (300) pass one second wire barrel (220) joint in first connecting hole (301).

8. Variable connection box for coaxial cable entries according to claim 1, characterized in that said plurality of second connection means (410) are electrically connected to said ground connection means (60), respectively.

9. Variable connection box for coaxial cable entries according to claim 1, characterized in that said plurality of first connection means (310) comprises first phase first connection means a₁A second phase first connecting device B₁And a third phase first connecting means C₁The plurality of second connecting means includes a first phase second connecting means A₂A second phase second connecting device B₂And a third phase second connecting means C₂Said first phase first connecting means A₁And a second connecting device C of the third phase₂Said second phase first connecting means B₁Second connecting means A with said first phase₂Said third phase first connecting means C₁Second connecting means B with said second phase₂。

10. The variable connection box for a coaxial cable inlet of claim 2, further comprising:

the protective devices (630) are respectively arranged on the surface, away from the insulators (620), of the first connecting plate (610), and the protective devices (630) and the second connecting devices (410) are arranged in a one-to-one correspondence mode.

11. The variable connection box for a coaxial cable inlet of claim 1, further comprising:

the cover body (204) and the box body (20) jointly form the first space (201).