CN217508204U - Tunnel cable support - Google Patents

Abstract

The utility model discloses a tunnel cable support, which comprises a fixed support detachably arranged on the tunnel wall, a supporting cross arm rotatably and adjustably installed with the fixed support, and a pull rod arranged on an upward extending section of the fixed support; the connecting plate is hinged with the supporting cross arm, and the pull rod is detachably connected with the connecting plate; the supporting cross arm and the fixed support and the supporting cross arm and the connecting plate are both provided with articulated shafts, and auxiliary supporting points are radially arranged along the articulated shafts. The utility model discloses in increase a plurality of auxiliary stay points, improved holistic intensity, guarantee to support the cross arm and still can keep the stable horizontal state in the different positions in tunnel, in addition the fixed bolster with the mode that articulates is taken to the pull rod, and easy to assemble and dismantlement have improved work efficiency.

Description

Tunnel cable support

Technical Field

The utility model relates to a high pressure large cross-section cable laying equipment technical field specifically indicates a circular and rectangle tunnel cable support.

Background

Traditional cable tunnel cable support and cable fixed knot construct need adopt welded mode and tunnel cross-section fixed, not only can lead to the support precision of on-the-spot installation not high like this, still can damage the galvanizing coat of cable support during the welding. Especially circular tunnel, cable support and circular tunnel wall are along with the mounting height difference, and its connection angle diverse is for every kind of mounting height, and the design support alone can need a lot of grinding apparatus, still can not the adjusting position after the installation, is difficult to the finished product production. Especially, high-voltage large-section cables have large vertical and longitudinal loads, and the traditional cable support is difficult to meet the stress requirement.

Chinese utility model publication No. CN209402100U discloses a high voltage cable support and a cable fixing structure thereof, which comprises a fixing support that can be fixed on a tunnel wall, a supporting support that is fixed with the fixing support and horizontally arranged, and an auxiliary supporting frame, one end of which is fixed on the fixing support, the other end of which is fixed with the supporting support, and the supporting support is kept in a stable horizontal state; and the supporting bracket is provided with a clamp positioning structure which can be matched and fixed with the cable fixing clamp. But the utility model discloses the relation of connection between each structure has only set up a strong point in the well cable support, and is still firm inadequately, when the external force that receives is great, easily takes place not hard up, in addition all need use the bolt fastening between each structure, the installation effectiveness is lower.

Disclosure of Invention

An object of the utility model is to provide a simple structure, can be applicable to 2.4 ~ 3.5 meters circular and rectangular cross section's cable tunnel medium-high voltage large cross section cable support and cable fixed knot construct, increase the supporting part of cable support structure in order to improve high tension cable support bulk strength and reliability, adopt the suspension connection to improve whole installation effectiveness in addition.

In order to achieve the purpose, the utility model discloses a tunnel cable support, which comprises a fixed support, a supporting cross arm and a pull rod, wherein the fixed support is detachably arranged on the tunnel wall, the supporting cross arm is rotatably and adjustably arranged with the fixed support, and the pull rod is arranged on an upward extending section of the fixed support; the connecting plate is hinged with the supporting cross arm, and the pull rod is detachably connected with the connecting plate; the supporting cross arm and the fixed support are provided with a first hinged shaft therebetween, a first auxiliary supporting point is at least arranged at one position along the radial direction of the first hinged shaft, a second hinged shaft is arranged between the supporting cross arm and the connecting plate, and a second auxiliary supporting point is arranged along the radial direction of the second hinged shaft.

Further, the fixed bolster includes the web of being connected with the tunnel wall, the web includes the first web in interconnect's upper portion and lower part second web, set up bilateral symmetry's first bolt via hole on the first web, be provided with bilateral symmetry's second bolt via hole on the second web, still include upwards extend the link plate of buckling on the first web, the link plate is provided with the arc slot, the link plate with there is the contained angle between the first web.

Furthermore, a connecting line between the first web plate and the second web plate along the tunnel wall is straight or has an included angle.

Furthermore, the left side and the right side of the second web plate are respectively and fixedly connected with a panel perpendicular to the second web plate, a fixed support through hole hinged with the supporting cross arm is formed in the circle center of the panel, and at least one first arc-shaped strip-shaped hole is formed in the radial direction of the circle center.

Further, the panel also comprises a reinforcing rib which extends upwards to the upper part, and the height of the reinforcing rib is higher than that of the first bolt through hole.

Furthermore, the pull rod is U-shaped, the pull rod includes with the pull rod suspended portion that the link plate articulates and with the pull rod free end that connecting plate detachably connects, the connecting plate can follow the pull rod free end realizes the removal regulation.

Furthermore, the connecting plate is L-shaped, one side of the connecting plate is provided with a pull rod through hole connected with the free end of the pull rod, and the other side of the connecting plate is provided with a first supporting through hole and a second supporting through hole connected with the side face of the supporting cross arm.

Furthermore, the side plates on two sides of the supporting cross arm comprise panel through holes which are arranged at the end parts close to the fixing supports and are vertical to the bottom surface of the supporting cross arm, and the panel through holes comprise first panel through holes corresponding to the fixing support through holes and at least one second panel through hole corresponding to the first arc-shaped strip-shaped hole; the panel is characterized by further comprising a second arc-shaped strip-shaped hole which is far away from the panel via hole and corresponds to the first supporting via hole and a connecting plate via hole which corresponds to the second supporting via hole.

Further, the projection of the pull rod and the connecting plate in the direction perpendicular to the side face of the supporting cross arm is a straight line.

Further, the ratio of the length from the connecting plate via hole to one side of the supporting cross arm close to the fixed support direction to the length of the whole supporting cross arm is 1/4-1/3.

Further, the fixing bracket via hole, the first panel via hole and the connecting bolt between each other form a first supporting part; the first arc-shaped strip-shaped hole, the second panel through hole and the connecting bolt form a second supporting part; the first support through hole, the second arc-shaped strip-shaped hole and the connecting bolt between the first support through hole and the second arc-shaped strip-shaped hole form a third support part; the second support via hole, the connecting plate via hole and the connecting bolt therebetween form the fourth support portion.

Compared with the prior art, the beneficial effects of the utility model are that:

1. the utility model discloses the supporting part that supports cross arm and pull rod and fixed bolster interconnect is more than one, has improved cable support's bulk strength, makes horizontal cross arm still can stably be in horizontal position in the different positions in tunnel.

2. The utility model discloses being connected through hanging between pull rod and the fixed bolster, comparing the bolt fixed connection that uses among the prior art, easy to assemble and dismantlement have improved work efficiency.

Drawings

Fig. 1 is a front view of a cable holder according to the present invention;

fig. 2 is a view of the cable holder according to the present invention;

FIG. 3 is a front view of the fixing bracket of the present invention with two different structures;

fig. 4 is a left side view of the fixing bracket of the present invention;

fig. 5 is a top view of the fixing bracket of the present invention;

FIG. 6 is a front view of the cross arm of the present invention;

fig. 7 is a left side view and a closing plate view of the middle support cross arm of the present invention;

FIG. 8 is a top view of the cross arm of the present invention;

fig. 9 is a front view of the middle pull rod of the present invention;

fig. 10 is a top view of the middle pull rod of the present invention;

fig. 11 is a front view of the connecting plate of the present invention;

fig. 12 is a left side view of the middle connection plate of the present invention;

fig. 13 is a top view of the connecting plate of the present invention;

fig. 14 is a front view of the cable holder and the supporting cable fixing jig according to the present invention;

fig. 15 is a front view of the cable holder and the suspension cable fixing clip of the present invention;

fig. 16 is a front view of the cable holder with the connecting suspension ring and the suspension cable fixing clamp of the present invention;

fig. 17 is a front view of the middle-high voltage cable support of the present invention, in which a supporting cable fixing clamp is installed in a circular tunnel with a diameter of 2.7 m;

FIG. 18 is an enlarged view of B in FIG. 17;

fig. 19 is a front view of the middle/high voltage cable support of the present invention, in which a supporting cable fixing clamp is installed in a circular tunnel with a diameter of 3.0 m;

fig. 20 is a front view of the middle-high voltage cable support of the present invention, which is used for installing a supporting cable fixing clamp in a circular tunnel with a diameter of 3.5 m;

fig. 21 is a front view of the middle-high voltage cable support of the present invention, in which a supporting cable fixing clamp is installed in a rectangular tunnel with a bottom edge of 2.7 m;

description of reference numerals: 100-a fixed support; 100.1-hanging plate; 100.2-a first web; 100.3-a second web; 100.4-panel; 100.5-reinforcing ribs; 101-a first arc-shaped strip-shaped hole; 102-a first bolt via; 103-a second bolt via hole; 104-a fixed mount via; 110-support cross arm; 111-panel vias; 111.1-a first panel via; 111.2-second panel via; 112-clamp fixing slot; 113-clamp fixing bolt holes; 114.1-a first connecting suspension loop via hole; 114.1-connecting suspension loop via holes; 115-a second arc-shaped strip-shaped hole; 116-connecting plate vias; 117-sealing plate; 120-a pull rod; 121-free end of tie rod; 122-a tie rod suspension; 130-a connecting plate; 131-a tie bar via hole; 132-a first support via; 133-a second support via; 140-connecting hanging ring; 150-supporting the cable fixing clamp; 160-hanging cable fixing clamp; 170-groove box.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention will be further described in detail 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 limiting of the invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and "fourth" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

The following description will be made in detail by embodiments, and as shown in fig. 1-2, the tunnel cable support includes a fixed support 100 abutting against a tunnel wall, a supporting cross arm 110 rotatably and adjustably mounted to the fixed support 100, and a pull rod 120 hooked to an upward extending section of the fixed support 100, wherein the other end of the pull rod 120 is connected to a connecting plate 130, the other end of the connecting plate 130 is hinged to the supporting cross arm 110, the supporting cross arm 110 and the fixed support 100 are provided with an auxiliary supporting point, and an auxiliary supporting point is provided between the supporting cross arm 110 and the connecting plate 130. Wherein, fig. 1 is a front view of the cable support of the present invention; fig. 2 is a cross-sectional view of a cable holder a according to the present invention, which includes a pull rod 120.

As shown in fig. 1 to 5, in the present embodiment, the fixing bracket 100 includes a web plate connected to the tunnel wall, and the web plate includes a hanging plate 100.1, a first web plate 100.2 and a second web plate 100.3 which are connected to each other in sequence from top to bottom. Link plate 100.1 is provided with the arc slot, link plate 100.1 with there is the contained angle between the first web 100.2, utilize the arc slot hangs pull rod 120, between pull rod 120 and the fixing support 100, adopt to hang and be connected, easy to assemble and dismantlement.

As shown in fig. 3 to 5, the first web 100.2 has two first bolt through holes 102 symmetrically formed on the left and right sides thereof, and the second web 100.3 has two second bolt through holes 103 symmetrically formed on the left and right sides thereof. The web is in a shape of Chinese character 'tu', the width of the first web 100.2 is not consistent with that of the second web 100.3, so that the manufacturing is convenient. The six bolt through holes are respectively detachably connected with the Hafen grooves (not shown in the figure) of the tunnel wall through bolts,

when used for a rectangular tunnel support, the form on the left side in fig. 3 is adopted, and the first web 100.2 and the second web 100.3 are tightly attached to the tunnel wall; the fixing support comprises a fixing support used for a round tunnelIn the way, the right form in fig. 3 is adopted, and the first web 100.2 clings to the tunnel wall, and 6 is arranged between the second web 100.3 and the tunnel wall ^° An included angle; the two forms can ensure that the fixing support 100 can be tightly connected with tunnel walls with different circular and rectangular shapes.

As shown in fig. 3, the left and right sides of the second web 100.3 are fixedly connected with panels perpendicular thereto, the lower side of the panel close to the tunnel wall is shaped as a rectangle and a semicircle extending tangentially from the rectangle, a circular fixing bracket via hole 104 hinged to the supporting cross arm 110 is formed at the center of the semicircle, first arc-shaped strip holes 101 are radially formed along the center of the circle and are vertically symmetrical, and the first arc-shaped strip holes 101 form a first auxiliary supporting point.

The panel is still including being close to the strengthening rib 100.5 that tunnel wall upwards extends to fixed bolster via hole 104 top, the strengthening rib has increased fixing support's whole atress on the one hand, and the small disparity of contact surface nonconformity when on the other hand has optimized the circular tunnel contact with different diameters makes the utility model discloses the commonality has more.

Preferably, the fixing bracket 100 is manufactured by integral casting, but a workpiece may be used.

As shown in fig. 6 to 8, the two side plates of the supporting cross arm 110 include a panel through hole 111 formed on the left side and perpendicular to the bottom surface of the supporting cross arm 110, the panel through hole 111 includes a first panel through hole 111.1 corresponding to the fixing bracket through hole 104 and two second panel through holes 111.2 corresponding to the first auxiliary supporting point, the corresponding circumferential angle of the first arc-shaped strip-shaped hole 101 is 108 °, the installation at different positions of the tunnel can be satisfied, and the supporting cross arm can still be kept horizontal. Fixed bolster via hole 104 first panel via hole 111.1 and the through-hole bolt each other form first supporting part, the through-hole bolt is the first articulated shaft that corresponds, two first solitary slotted hole 101 second panel via hole 111.2 and the short bolt each other form two second supporting parts. The supporting cross arm 110 and the fixing bracket 100 can rotate around the through-hole bolt, and the second supporting portion is used for further increasing the connection strength between the two, so that the supporting cross arm can be stably maintained in a horizontal position.

In this embodiment, as shown in fig. 7, the left side view of the supporting cross arm 110 shows that the supporting cross arm is U-shaped to reduce the overall weight, and the sealing plates 117 are welded to both ends to increase the overall strength.

In the present embodiment, as shown in fig. 9-13, the tie bar 120 is U-shaped, and is divided into a hanging portion 122 and a tie bar free end 121. The pull rod hanging portion 122 is connected with an arc-shaped groove in the hanging plate 100.1, and the width of the hanging plate 100.1 is smaller than that of the pull rod hanging portion 122. The connection form is simple, compares prior art bolted connection, conveniently installs and dismantles.

The free ends 121 of the pull rods are provided with threads, the two free ends 121 of the pull rods respectively penetrate through the pull rod through holes 131 in the two connecting plates 130, the upper side and the lower side of each pull rod through hole 131 are fastened and connected through nuts, and the telescopic pull rod structure is formed by adjusting the positions of the nuts on the free ends 121 of the pull rods. The pull rods with different lengths can be adopted according to different positions of the tunnel, and the length of the free end of each pull rod is 210mm when the pull rod is close to the top of the tunnel in the embodiment; the length of the free end of the pull rod is 310mm when the pull rod is close to the bottom end of the tunnel, and the length is selected according to the diameter of the tunnel and the field condition. Preferably, the material of the pull rod 120 is galvanized steel to bear sufficient tensile force.

As shown in fig. 11 to 13, a first supporting via hole 132 and a second supporting via hole 133 are sequentially opened at an end of a long side of the connecting plate 130, the second supporting via hole 133 forms a second hinge point for connecting the pull rod 120, and the first supporting via hole 132 is used for forming a second auxiliary supporting point for supporting the pull rod 120. The connecting plate adopts integrative cast processing form, opens two and supports the via hole and can improve joint strength.

The side plates on two sides of the supporting cross arm 110 further include a second arc-shaped strip-shaped hole 115 and a corresponding connecting plate via hole 116, which are far away from the panel via hole 111 and correspond to the first supporting via hole 132. The first support via 132, the second arc-shaped strip hole 115 and the short bolts therebetween form a third support portion. The second support via hole 133, the connecting plate via hole 116, and a through-hole bolt therebetween form a fourth support portion, the through-hole bolt corresponding to the second hinge shaft. The support cross arm 110 and the connection plate 130 are rotatable about the second hinge shaft, and the third support portion is used to further increase the connection strength therebetween, so that the support cross arm can be stably maintained in a horizontal position.

In this embodiment, after the cable holder is installed, since the projections of the pull rod 120 and the connecting plate 130 in the direction perpendicular to the lateral side of the supporting cross arm 110 are a straight line, the requirement of the pulling force on the straight line can be met, and the overall stability is improved.

Preferably, the ratio of the distance from the connecting plate via hole 116 to the left end of the fixing bracket 100 to the length of the whole supporting cross arm 110 is 1/4-1/3, so that the overall strength is satisfied, and meanwhile, a sufficient installation space of the cable fixing structure is ensured.

Referring to fig. 14 to 20, the cable fixing structure for circular and rectangular tunnels according to the present invention includes a tunnel cable support, the cable fixing jig includes a supporting cable fixing jig 150 and a hanging cable fixing jig 160, the jig fixing structure includes a first jig fixing structure for fixing the supporting cable fixing jig 150 to the top surface of the supporting cross arm and a second jig fixing structure for fixing the hanging cable fixing jig 160 to the bottom surface of the supporting cross arm.

As shown in fig. 8, the first clip fixing structure includes clip fixing bolt holes 113 provided along the top surface of the support cross arm 110 at intervals in the axial direction thereof to assist the support cable fixing clip 100 to be fixed to the top surface of the support cross arm 110, the clip fixing bolt holes being located between adjacent two of the clip fixing elongated holes 112, and a bolt passing through the clip fixing elongated holes 112 or the clip fixing bolt holes 113 and the support cable fixing clip 100 is fixedly connected with a nut.

As shown in fig. 15, the second clamp fixing structure includes a plurality of sets of hoisting fixing brackets detachably fixed to left and right side surfaces of the supporting bracket at intervals along an axial direction of the supporting cross arm 110, and the suspension cable fixing clamp 160 is detachably fixed to the hoisting fixing brackets.

As a further improvement of the utility model, as shown in fig. 16, the hoist and mount fixed bolster including symmetrical arrangement in support cross arm 110 left and right sides surface, can with the side surface of support cross arm 110 becomes the connection link 140 of 0 ~ 180, it has the slot hole that can supply bolted connection to open in the link 140, the slot hole upper end is connected with support cross arm 110's side surface, the slot hole lower extreme is connected with hang cable mounting fixture 160, the lower extreme all adopts long bolt detachably to connect on the slot hole.

In this embodiment, after the connecting hanging ring 140 and the hanging cable fixing clamp 160 are installed on the lower side of the supporting cross arm 110, the cable can be fixed under different conditions such as up-down and left-right turning of the tunnel wall, and the construction is convenient.

Fig. 17 to 20 correspond to the drawings of a circular tunnel with a diameter of 2.7m, a rectangular tunnel with a bottom side length of 2.7m in the case of 3.0m and a rectangular tunnel with a diameter of 3.5m, respectively, and the connection forms are all supporting cable fixing clamps 150, but a hanging cable fixing clamp installation form can also be adopted.

The fixed support 100, the supporting cross arm 110, the pull rod 120 and the connecting plate 130 are connected by adjusting the length of the connection between the pull rod and the connecting plate according to different positions of the side wall of the tunnel where the support is located, wherein the pull rod 120 and the connecting plate 130 are always in a straight line, so that the supporting cross arm 110 is always kept in a horizontal state. As shown in fig. 17 and 18, when the cable holder is located above the side wall of the circular tunnel, the overall length of the tie bar 120 and the connecting plate 130 is shortest, the extension lines of the web of the fixed holder, the tie bar 120, the connecting plate 130 and the support cross arm 110 form a trilateral shape, and the support cross arm 110 is in a horizontal state; when the cable support is at other positions of the side wall of the circular tunnel, the connecting position of the free end 121 of the pull rod and the connecting plate 130 is adjusted, so that the overall length of the pull rod 120 and the connecting plate 130 is gradually increased, the above components approximately form a triangular structure, and the detailed view is shown in fig. 1, and the support cross arm 110 is still kept in a horizontal state. Under the effect of the vertical gravity of the cable, the overall stress of the supporting cross arm can be improved by adjusting the length of the pull rod and the connecting plate.

As shown in fig. 21, when the tunnel is square, the cable holder of the present invention is located at any position of the sidewall of the tunnel wall, and the fixing bracket 100, the supporting cross arm 110, the pull rod 120 and the connecting plate 130 all form a stable triangular structure, so that the cable holder has strong stability.

As shown in fig. 17 to 20, the supporting cross arm 110 on the uppermost surface of the tunnel in the present embodiment is 0.6 m long, and is used for the trough box on the uppermost layer of the circular tunnel, but can also be used for fixing two cables; in this embodiment, the length of the other support cross arm 110 is 0.8 m, and is used for fixing three cables; however, it is also possible to use a support cross arm 110 having a length of 1.2 meters for fixing two cables and a cable joint.

It is to be understood that the present invention has been described with reference to the embodiments, and those skilled in the art will recognize that various changes may be made and equivalents may be substituted for elements thereof without departing from the spirit and scope of the present invention. In addition, many modifications may be made to adapt a particular situation or material to the teachings of the invention without departing from the essential scope thereof. Therefore, the present invention is not limited to the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of the present application are intended to be covered by the present invention.

Claims (10)

1. A tunnel cable support comprises a fixed support (100) detachably arranged on a tunnel wall, a supporting cross arm (110) rotatably and adjustably mounted with the fixed support (100), and a pull rod (120) arranged on an upward extending section of the fixed support (100);

the method is characterized in that: a connecting plate (130) hinged with the supporting cross arm (110), wherein the pull rod (120) is detachably connected with the connecting plate (130); a first articulated shaft is arranged between the supporting cross arm (110) and the fixed support (100), at least one first auxiliary supporting point is radially arranged along the first articulated shaft, a second articulated shaft is arranged between the supporting cross arm (110) and the connecting plate (130), and a second auxiliary supporting point is radially arranged along the second articulated shaft.

2. A tunnel cable support according to claim 1, wherein: fixed bolster (100) include the web of being connected with the tunnel wall, the web includes the first web in upper portion (100.2) and lower part second web (100.3) of interconnect, set up bilateral symmetry's first bolt via hole (102) on first web (100.2), be provided with bilateral symmetry's second bolt via hole (103) on second web (100.3), the web still includes upwards extend link plate (100.1) of buckling on first web (100.2), link plate (100.1) are provided with the arc slot, link plate (100.1) with there is the contained angle between first web (100.2).

3. A tunnel cable support according to claim 2, wherein: the first web plate (100.2) and the second web plate (100.3) are in a straight line or have an included angle along a connecting line of the tunnel wall.

4. A tunnel cable support according to claim 3, wherein: the left side and the right side of the second web plate (100.3) are respectively and fixedly connected with a panel perpendicular to the second web plate, a fixing support through hole (104) hinged with the supporting cross arm (110) is formed in the circle center of the panel, and at least one first arc-shaped strip-shaped hole (101) is formed in the radial direction of the circle center.

5. The tunneling cable support according to claim 4, wherein: the pull rod (120) is U-shaped, the pull rod (120) comprises a pull rod hanging part (122) hung on the hanging plate (100.1) and a pull rod free end (121) detachably connected with the connecting plate (130), and the connecting plate (130) can move and adjust along the pull rod free end (121).

6. The tunnel cable holder according to claim 5, wherein: the connecting plate (130) is L-shaped, one side of the connecting plate (130) is provided with a pull rod through hole (131) connected with the free end (121) of the pull rod, and the other side of the connecting plate is provided with a first supporting through hole (132) and a second supporting through hole (133) connected with the side surface of the supporting cross arm (110).

7. The tunneling cable support according to claim 6, wherein: the side plates on two sides of the supporting cross arm (110) comprise end parts close to the fixed support (100) and panel through holes (111) perpendicular to the bottom surface of the supporting cross arm (110), and the panel through holes (111) comprise first panel through holes (111.1) corresponding to the fixed support through holes (104) and at least one second panel through hole (111.2) corresponding to the first arc-shaped strip-shaped hole (101); the panel is characterized by further comprising a second arc-shaped strip hole (115) which is far away from the panel through hole (111) and corresponds to the first supporting through hole (132) and a connecting plate through hole (116) which corresponds to the second supporting through hole (133).

8. A tunnel cable support according to claim 1, wherein: the projections of the pull rod (120) and the connecting plate (130) in the direction perpendicular to the side surface of the supporting cross arm (110) are straight lines.

9. The tunneling cable support according to claim 7, wherein: the ratio of the length from the connecting plate via hole (116) to one side of the supporting cross arm (110) close to the fixed support (100) to the length of the whole supporting cross arm (110) is 1/4-1/3.

10. The tunneling cable support according to claim 7, wherein: fixed bolster via hole (104) first panel via hole (111.1) and connecting bolt each other form first supporting part, first solitary slotted hole (101) second panel via hole (111.2) and connecting bolt each other form the second supporting part, first support via hole (132) the solitary slotted hole of second (115) and connecting bolt each other form the third supporting part, the second support via hole (133) connecting bolt between each other forms the fourth supporting part.

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