CN110970840A

CN110970840A - Railway signal cable termination method

Info

Publication number: CN110970840A
Application number: CN201911202369.XA
Authority: CN
Inventors: 郭丰明
Original assignee: Shenzhen Keanda Electronic Technology Co ltd
Current assignee: Shenzhen Keanda Electronic Technology Co ltd
Priority date: 2019-11-15
Filing date: 2019-11-29
Publication date: 2020-04-07
Anticipated expiration: 2039-11-29
Also published as: CN110970840B

Abstract

The invention relates to a railway signal cable terminating method, which comprises the steps of coating an exposed armor layer and/or an exposed aluminum sheath layer by a strip-shaped conductive piece, and changing point or line connection into surface contact, wherein the contact area is large, the contact is stable, the cross-sectional area is large, the conductive capacity is strong, and the service life is long; the device can bear lightning current and power frequency current; the external current can be rapidly led out, and the interference of the external current on the signal cable is reduced; through the glue pouring sealing of the drainage box, the safety is improved, the interference caused by the fact that external current flows out to other parts is avoided, and meanwhile, the stability of the coating of the strip-shaped conductive piece is also improved.

Description

Railway signal cable termination method

Technical Field

The invention relates to the technical field of signal cable grounding, in particular to a railway signal cable terminating method.

Background

The existing cable grounding technology is mainly designed for lightning protection, and in case of lightning strike above or near a cable line in thunderstorm weather, strong lightning current can also be induced to the cable line along the line, and large currents such as traction backflow, lightning current and the like are directly led into a mechanical room from the outdoor line along the line, so that damage to distribution panel equipment, heating short circuit of indoor cables and the like is easily caused, and driving safety is affected.

The existing cable grounding technology generally adopts an end-forming lightning protection technology: conducting current by using a conducting wire twisted into a rope, welding one end of the conducting wire on the V-shaped clamp, and fixing the V-shaped clamp on the shielding layer, or binding the V-shaped clamp on the shielding layer by using a hose clamp and then connecting the V-shaped clamp to a grounding terminal, wherein the grounding terminal is connected to a grounded copper bar or a grounded copper bar.

The mode can ground the instantaneous lightning current, but cannot play a role in guiding the power frequency current which is mistakenly input and has long duration, and the conductive wire is easy to heat under the continuous power frequency current to cause combustion, so that a fire is further caused, and safety accidents are caused; on the other hand, the contact surface formed by welding the conductive wires on the V-shaped card is approximately in point contact, and the contact surface formed by binding the throat hoop on the aluminum sheath layer is in line contact, so that the contact area is very small, the current transfer capacity is very limited, and the external current still causes some interference; in addition, the armor layer and the aluminum sheath layer are connected in series in the mode, so that mutual influence can be caused, and interference is formed; in addition, the mode is more complicated to install, increases the construction difficulty, and is not favorable for production.

Disclosure of Invention

In view of the above, it is desirable to provide a simple and fast method for terminating railway signal cables.

In order to solve the technical problems, the invention adopts the technical scheme that: a railway signal cable termination method comprising the steps of:

A. peeling off the outer skin of the signal cable to expose the shielding layer, wherein the shielding layer comprises an armor layer and an aluminum sheath layer;

B. wrapping a strip-shaped conductive piece on the exposed armor layer and/or the exposed aluminum sheath layer, and locking the wrapping state of the strip-shaped conductive piece;

C. a current leakage box is sleeved outside the exposed shielding layer, the strip-shaped conductive piece extends out of the current leakage box, or a grounding terminal penetrating through the current leakage box is arranged on the current leakage box, and the strip-shaped conductive piece is connected to the grounding terminal;

D. and pouring glue into the drainage box.

Further, the method also comprises the following steps:

E. a layer of grounding copper strips and wire binding rods are arranged in the drainage cabinet from inside to outside;

F. the signal cable penetrates through the drainage cabinet and enables the drainage box to be located in the drainage cabinet, the signal cable is fixed with the wire binding rod through a wire binding hole in the wire binding rod, and the strip-shaped conductive piece or the grounding terminal is connected to the grounding copper strip;

G. repeating the step F until the signal cable is filled with a row along the binding hole;

H. repeating steps E-G until the drainage cabinet is full of the signal cables.

Further, the step a comprises: and peeling off a section of outer skin on the signal cable to expose a section of the armor layer, wherein the peeled-off part of the exposed armor layer exposes the aluminum sheath layer and retains a section of the exposed armor layer.

Further, the step a comprises: and peeling off one section of outer skin on the signal cable to expose one section of the armor layer, and peeling off the other section of outer skin on the signal cable and the armor layer at a certain interval to expose the aluminum sheath layer.

Further, in the step C, the drain box includes a first drain box and a second drain box, the first drain box seals the exposed armor layer, and the second drain box seals the exposed aluminum sheath layer.

Further, the step B includes: coating the exposed armor layer with the first strip-shaped conductive piece, and coating the exposed aluminum sheath layer with the second strip-shaped conductive piece; in the step C and the step D, the exposed armor layer and the exposed aluminum sheath layer are sealed in the same drainage box.

In step E and step F, the grounding copper bars include a first grounding copper bar and a second grounding copper bar that are isolated from each other, the first strip-shaped conductive member is communicated with the first grounding copper bar, and the second grounding copper bar is communicated with the second strip-shaped conductive member.

Further, in the step a, the tape-shaped conductive member covers the armor layer or the aluminum sheath layer.

Furthermore, the strip-shaped conductive piece comprises a coating ring and an extension strip which are integrally extended, and the coating ring is coated outside the shielding layer; the extension strip extends out of the leakage box and is connected to the grounding copper strip, or the extension strip is connected to the grounding terminal in an extension mode, and the grounding terminal is connected to the grounding copper strip.

Furthermore, in the step B, the locking device is used for locking the coating state of the coating ring, the locking device comprises a clamping table and a locking bolt, the extension belt extends out of two ends of the coating ring by a section respectively, the clamping table is provided with a clamping hole for the extension belt to penetrate out, and a screw hole matched with the locking bolt is formed in one radial surface of the clamping hole.

The invention has the beneficial effects that: the exposed armor layer and/or the exposed aluminum sheath layer are/is coated by the strip-shaped conductive piece, and the point or line contact is changed into surface contact, so that the contact area is large, the contact is stable, the cross section area is large, the conductive capacity is high, and the service life is long; the device can bear lightning current and power frequency current; the external current can be rapidly led out, and the interference of the external current on the signal cable is reduced; through the glue pouring sealing of the drainage box, the safety is improved, the interference caused by the fact that external current flows out to other parts is avoided, and meanwhile, the stability of the coating of the strip-shaped conductive piece is also improved.

Drawings

FIG. 1 is a schematic flow chart of a method for terminating a railway signal cable according to an embodiment of the present invention;

FIG. 2 is a schematic flow chart of a method of a second embodiment of a method for terminating a railway signal cable according to an embodiment of the present invention;

FIG. 3 is a schematic method flow diagram of a third embodiment of a method for terminating a railway signal cable according to an embodiment of the present invention;

fig. 4 is a schematic flow chart of a method of implementing a railway signal cable termination method according to a fourth embodiment of the present invention;

fig. 5 is a schematic flow chart of another method of the fourth embodiment of the railway signal cable termination method of the fourth embodiment of the present invention;

FIG. 6 is a schematic structural view of a drainage cabinet according to an embodiment of the present invention;

FIG. 7 is a schematic diagram of a structure for mounting a layer of signal cables according to an embodiment of the present invention;

FIG. 8 is a schematic view of another orientation of the present invention for mounting a layer of signal cables;

fig. 9 is a schematic structural view of a drainage cabinet full signal cable according to an embodiment of the present invention;

FIG. 10 is a schematic view of a connection structure of the drain box and the grounding copper bar according to the embodiment of the present invention;

FIG. 11 is a schematic structural diagram of a second embodiment of the present invention;

FIG. 12 is a schematic structural diagram of a third embodiment of the present invention;

fig. 13 is a schematic structural view of a ribbon-shaped conductive member according to an embodiment of the present invention;

FIG. 14 is a schematic structural view of a clamping table of the locking mechanism of the embodiment of the invention;

FIG. 15 is a schematic structural view of a locking mechanism of an embodiment of the present invention;

fig. 16 is a schematic structural diagram of a signal cable according to an embodiment of the present invention.

Description of reference numerals:

100. a signal cable; 110. a cable core; 120. a cable tie; 130. an aluminum jacket layer;

140. an insulating layer; 150. an armor layer; 160. a skin; 200. a strip-shaped conductive member; 210. coating a ring;

220. an extension band; 221. a first coarse section; 222. a second coarse section;

230. a first strip-shaped conductive member; 240. a second strip-shaped conductive member; 300. a bleed box;

310. a ground terminal; 311. a first ground terminal 312, a second ground terminal; 320. filling glue holes;

321. filling a rubber plug; 330. a first bleed flow box; 340. a second bleed box; 400. a drainage cabinet;

410. a top frame; 411. a first threading opening; 420. upright 430, underframe; 431. a second threading opening;

500. a grounding copper bar; 510. a horizontal bar; 520. side strips; 530. vertical bars; 540. a first grounding copper bar;

550. a second grounded copper bar; 600. a wire binding rod; 610. a wire binding hole; 620. a cross bar;

700. a locking mechanism; 710. a clamping table; 711. a clamping hole; 712. a screw hole; 720. and locking the bolt.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more clearly understood, a railway signal cable termination method according to 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.

Implementation mode one

Referring to fig. 1-16, a method for grounding a railway signal cable 100 by shielding includes the following steps:

A. stripping the outer jacket 160 of the signal cable 100 to expose the shielding layer, which includes the armor layer 150 and the aluminum jacket layer 130;

B. wrapping the tape-shaped conductive member 200 on the exposed armor layer 150 and/or the aluminum sheath layer 130, and locking the wrapping state of the tape-shaped conductive member 200;

C. a leakage box 300 is sleeved outside the exposed shielding layer, the belt-shaped conductive member 200 extends out of the leakage box 300, or a grounding terminal 310 penetrating through the inside and the outside is arranged on the leakage box 300, and the belt-shaped conductive member 200 is connected to the grounding terminal 310;

D. and filling the leakage box 300 with glue.

The exposed armor layer 150 and/or the exposed aluminum sheath layer 130 are/is coated by the strip-shaped conductive member 200, point or line contact is realized for surface contact, the contact area is large, the contact is stable, the cross section area is large, the conductive capacity is high, and the service life is long; the device can bear lightning current and power frequency current; the external current can be rapidly led out, and the interference of the external current to the signal cable 100 is reduced; the leakage box 300 is sealed by glue filling, so that the safety is improved, the interference caused by the leakage of external current to other parts is avoided, and the stability of the coating of the strip-shaped conductive piece 200 is improved.

Further comprising the steps of:

E. a layer of grounding copper strips 500 and a binding rod 600 are arranged in the drainage cabinet 400 from inside to outside;

F. the signal cable 100 passes through the drainage cabinet 400 and locates the drainage box 300 in the drainage cabinet 400, the signal cable 100 is fixed with the binding bar 600 through the binding hole 610 on the binding bar 600, and connects the ribbon-shaped conductive member 200 or the grounding terminal 310 to the grounding copper strip 500;

G. repeating step F until the signal cables 100 fill a row along the wire-tying hole 610;

H. steps E to G are repeated until the drainage cabinet 400 is full of the signal cable 100.

The signal cable 100 passes through the drainage cabinet 400 and is fixed with the wire binding rod 600 through the wire binding hole 610, so that the signal cable 100 is ensured to be orderly and convenient to maintain; the signal cable 100 is installed from the innermost layer, which facilitates installation.

Referring to fig. 16, it can be understood that the signal cable 100 includes, from the outside to the inside, an outer sheath 160, an armor layer 150, an insulating layer 140, an aluminum jacket layer 130, a cable sheathing layer 120, and a cable core 110, wherein the armor layer 150 and the aluminum jacket layer 130 are shielding layers, the armor layer 150 is also called a steel tape layer and is generally made of steel, and the aluminum jacket layer 130 is also called an inner liner layer and is generally made of aluminum, and is used for ground leakage due to the high electrical conductivity of the materials of the armor layer 150 and the aluminum jacket layer 130. In particular, a section of the insulating layer 140 is left at each end of the exposed aluminum sheath layer 130, so as to prevent the armor layer 150 and the aluminum sheath layer 130 from interfering with each other.

Referring to fig. 6 to 9, the drainage cabinet 400 is a rectangular parallelepiped structure, and the signal cable 100 is threaded into the drainage cabinet 400 in a height direction, i.e. in a top-in-bottom-out manner or in a bottom-in-top-out manner. The wire binding rods 600 are provided with a plurality of wire binding holes 610 at intervals along the length direction, the wire binding rods 600 are horizontally arranged in the drainage cabinet 400, generally, each layer can be provided with a plurality of wire binding rods 600 along the height direction, and preferably, each layer is provided with four wire binding rods 600. The grounding copper bar 500 includes a horizontal bar 510 disposed in parallel with the wire binding bar 600, a side bar 520 connecting the horizontal bars 510, and a vertical bar 530 for grounding.

Referring to fig. 6-9, the drainage cabinet 400 is a frame structure, and includes a bottom frame 430, a vertical column 420 and a top frame 410, wherein the vertical column 420 supports and connects the bottom frame 430 and the top frame 410, the top frame 410 forms a first threading opening 411, the bottom frame 430 forms a second threading opening 431, and particularly, the first threading opening 411 and the second threading opening 431 are opened back to the horizontal side; preferably, a door panel may be further provided, which is installed after the signal cable 100 is filled, for dust prevention and beauty, and preferably, the door panel is made of a fireproof material. Generally, the binding rod 600 is fixed on the upright post 420 through side rods, and one side rod can fix a plurality of binding rods 600 to form multiple layers; typically, the side strips 520 of the grounding copper strip 500 are fixed to the vertical columns 420.

Referring to fig. 10-12, the box 300 generally comprises an upper cover and a lower cover, and the upper cover and the lower cover are fixed together by a hose clamp to cover the exposed shielding layer of the signal cable 100; the leakage box 300 is provided with a glue filling hole 320 and a glue filling plug 321 matched with the glue filling hole 320, which are obliquely arranged, for filling glue. The bleed flow box 300 is also commonly referred to as an end-forming box.

Referring to fig. 7 and 8, in steps E and F, the grounding copper strip 500 is installed on the side of the signal cable 100 opposite to the cable tie 600. The installation is convenient; typically, the grounding copper bar 500 is mounted on the outer layer and the wire tie 600 is mounted on the inner layer. It is to be understood that the present invention has the entrance side of signal cable 100 as the "inner layer," or "inner layer," and the exit side of signal cable 100 as the "outer layer.

Referring to fig. 13, the tape-shaped conductive member 200 includes a covering ring 210 and an extending tape 220 integrally extending, the covering ring 210 covering the shielding layer; the extension band 220 extends out of the drain box 300 to be connected to the grounding copper bar 500, or the extension band 220 is extended to be connected to the grounding terminal 310, and the grounding terminal 310 is connected to the grounding copper bar 500. When the tape-shaped conductive member 200 and the grounding copper bar 500 are connected through the grounding terminal 310, it is possible to assist in fixing the signal cable 100; meanwhile, deformation or breakage of the tape-shaped conductive member 200 is prevented, the cross-sectional area is reduced due to deformation of the tape-shaped conductive member 200, the current-carrying capacity is lowered, and safety and reliability can be ensured by the ground terminal 310.

Referring to fig. 14 and 15, in step B, a locking mechanism 700 for locking the covering state of the covering ring 210 is further included, the locking mechanism 700 includes a clamp 710 and a locking bolt 720, the extension belt 220 extends out of two ends of the covering ring 210 by a section, the clamp 710 is provided with a clamp hole 711 through which the extension belt 220 passes, and a screw hole 712 adapted to the locking bolt 720 is provided on one radial surface of the clamp hole 711. The extending belt is locked by the clamping table 710 and the locking bolt 720, so that the cladding state of the cladding ring 210 is locked, the locking is stable, and the operation is simple. Simply, it can also be fixed by a similar clamp or by direct welding.

Specifically, referring to fig. 13, two rough sections, namely a first rough section 221 and a second rough section 222, are disposed on the extension belt 220, both sides of the first rough section 221 and the second rough section 222 are rough structures, the first rough section 221 and the second rough section 222 are in contact, and the locking mechanism 700 is clamped outside the first rough section 221 and the second rough section 222.

As a preferred aspect of the present invention, the method further comprises a step I of installing a fire extinguishing device and an inductor in the drainage cabinet 400. The installation of the fire extinguishing device and the inductor can improve the safety, and the fire can be extinguished when the fire is small, thereby avoiding the major loss and the safety accident; a simple sensor may be a smoke sensor or a temperature sensor.

Second embodiment

Referring to fig. 2 and fig. 11, the second embodiment is an extension on the basis of the first embodiment:

the step A comprises the following steps: peeling off a section of the jacket 160 from the signal cable 100 exposes a section of the armor layer 150, and peeling off a portion of the exposed armor layer 150 exposes the aluminum jacket layer 130 and leaves a section of the exposed armor layer 150.

The step B comprises the following steps: covering the exposed armor layer 150 with a first tape-shaped conductive member 230, and covering the exposed aluminum sheath layer 130 with a second tape-shaped conductive member 240; in steps C and D, the exposed armor layer 150 and the exposed aluminum jacket layer 130 are sealed within the same vent box 300.

In steps E and F, the grounding copper strip 500 includes a first grounding copper strip 540 and a second grounding copper strip 550500 isolated from each other, the first strip-shaped conductive member 230 is communicated with the first grounding copper strip 540, and the second grounding copper strip 550500 is communicated with the second strip-shaped conductive member 240.

The armor layer 150, the first strip-shaped conductive member 230- (the first grounding terminal 311) -the first grounding copper strip 540, the aluminum sheath layer 130, the second strip-shaped conductive member 240- (the second grounding terminal 312) -the second grounding copper strip 550500, and the grounding lines at two ends are isolated from each other, so that mutual interference is avoided, the stability and reliability of the signal cable 100 are improved, and a guarantee is provided for driving safety.

Third embodiment

Referring to fig. 3 and fig. 12, the third embodiment is another development based on the first embodiment:

the step A comprises the following steps: stripping a section of the jacket 160 from the signal cable 100 exposes a section of the armor layer 150, and stripping another section of the jacket 160 and armor layer 150 from the signal cable 100 at a distance exposes the aluminum jacket layer 130.

In step C, the leakage box 300 includes a first leakage box 330 and a second leakage box 340, the first leakage box 330 seals the exposed armor layer 150, and the second leakage box 340 seals the exposed aluminum sheath layer 130.

That is, the first and

second drain boxes

330 and 340 are provided, the armor layer 150 is exposed in the first drain box 330, the exposed armor layer 150 is wrapped by the first strip-shaped conductive member 230, the aluminum sheath layer 130 is exposed in the second drain box 340, the exposed aluminum sheath layer 130 is wrapped by the second strip-shaped conductive member 240, the first strip-shaped conductive member guides an external current to the first grounding copper bar 540, and the second strip-shaped conductive member guides an external current to the second grounding copper bar 550500. Interference between the incoming current on the armor layer 150 and the incoming current on the aluminum jacket layer 130 is further reduced by the exposed armor layer 150 and the exposed aluminum jacket layer 130 being spaced apart a distance and within the isolated first and

second bleed boxes

330, 340, respectively.

Specifically, the second bleed box 340 is disposed close to the machine room with respect to the first bleed box 330.

Embodiment IV

Referring to fig. 4 and 5, the fourth embodiment is another development based on the first embodiment:

further, in step a, the tape-shaped conductive member 200 covers the armor layer 150 or the aluminum sheath layer 130.

That is, the tape conductor 200 is wrapped around only the exposed armor layer 150 or the aluminum sheath layer 130, and then the leakage box 300 is sealed, and the tape conductor 200 is connected to the grounding copper bar 500 (or through the grounding terminal 310).

Under the condition of low requirement on the flow conductivity, the fourth embodiment can be adopted. This way the flow conductivity is reduced compared to the second and third embodiments, but at a lower cost.

In conclusion, the railway signal cable termination method provided by the invention has the advantages of strong conductivity and long service life; the device can bear lightning current and power frequency current; the external current can be rapidly led out, and the interference of the external current on the signal cable is reduced; the safety is high, the anti-interference capability is strong, and the stability is strong; the signal cables are orderly and convenient to maintain; the installation is convenient.

Although the present invention has been described with reference to a preferred embodiment, it should be understood that various changes, substitutions and alterations can be made herein without departing from the spirit and scope of the invention as defined by the appended claims.

Claims

1. A railway signal cable termination method, comprising the steps of:

D. and pouring glue into the drainage box.

2. The method of claim 1, further comprising the steps of:

H. repeating steps E-G until the drainage cabinet is full of the signal cables.

3. The method of claim 1, wherein step a comprises: and peeling off a section of outer skin on the signal cable to expose a section of the armor layer, wherein the peeled-off part of the exposed armor layer exposes the aluminum sheath layer and retains a section of the exposed armor layer.

4. The method of claim 1, wherein step a comprises: and peeling off one section of outer skin on the signal cable to expose one section of the armor layer, and peeling off the other section of outer skin on the signal cable and the armor layer at a certain interval to expose the aluminum sheath layer.

5. The method of claim 4, wherein in step C, the drain box comprises a first drain box and a second drain box, the first drain box seals the exposed armor layer, and the second drain box seals the exposed aluminum jacket layer.

6. The method of claim 3 or 5, wherein step B comprises: coating the exposed armor layer with the first strip-shaped conductive piece, and coating the exposed aluminum sheath layer with the second strip-shaped conductive piece; in the step C and the step D, the exposed armor layer and the exposed aluminum sheath layer are sealed in the same drainage box.

7. The method of claim 6, wherein in steps E and F, the grounding copper strips comprise a first grounding copper strip and a second grounding copper strip which are isolated from each other, the first strip-shaped conductive member is in communication with the first grounding copper strip, and the second grounding copper strip is in communication with the second strip-shaped conductive member.

8. The method of claim 1, wherein in step a, the tape conductor is wrapped around the armor layer or the aluminum jacket layer.

9. The method of claim 1, wherein the tape-shaped conductive member comprises a covering ring and an extension tape integrally extended, the covering ring covering the shielding layer; the extension strip extends out of the leakage box and is connected to the grounding copper strip, or the extension strip is connected to the grounding terminal in an extension mode, and the grounding terminal is connected to the grounding copper strip.

10. The method according to claim 9, wherein the step B further comprises a locking mechanism for locking the covering state of the covering ring, the locking mechanism comprises a clamping table and a locking bolt, the extension belt extends out of two ends of the covering ring by a section respectively, the clamping table is provided with a clamping hole for the extension belt to pass through, and a screw hole adapted to the locking bolt is arranged on one radial surface of the clamping hole.