CN112343085A

CN112343085A - Tunnel cable bridge vertical shaft with small occupied space

Info

Publication number: CN112343085A
Application number: CN202011253699.4A
Authority: CN
Inventors: 卓芳
Original assignee: Xiaogan Ruichuang Machinery Technology Co ltd
Current assignee: Xiaogan Ruichuang Machinery Technology Co ltd
Priority date: 2020-11-11
Filing date: 2020-11-11
Publication date: 2021-02-09

Abstract

The invention discloses a tunnel cable bridge vertical shaft with small occupied space, which comprises a four-way structure, wherein a vertical shaft structure is arranged at the lower end of the four-way structure, a connecting frame is respectively arranged on the four-way structure and the vertical shaft structure, a connecting structure is respectively arranged below the two connecting frames on the four-way structure and the vertical shaft structure, and two pull-type protective doors are symmetrically arranged inside the vertical shaft structure. The invention relates to a tunnel cable bridge vertical shaft with small occupied space, belonging to the field of electrical equipment.A connecting structure and a connecting frame are arranged, and a fixing spring and a fixing structure are arranged in the connecting frame, so that the complexity of installation and disassembly can be simplified; by arranging the pull-type pull protection door, the space occupied by opening the pull protection door can be reduced; through setting up closed spring, can be convenient for the closure of pull guard gate to finally improve the installation of cross structure and shaft structure, dismantle efficiency, improve the practicality of cable testing bridge shaft.

Description

Tunnel cable bridge vertical shaft with small occupied space

Technical Field

The invention relates to the field of electrical equipment, in particular to a tunnel cable bridge vertical shaft with small occupied space.

Background

The tunnel is an engineering building buried in the stratum and is a form of utilizing underground space by human beings, and the tunnel can be divided into a traffic tunnel, a hydraulic tunnel, a municipal tunnel, a mine tunnel and a military tunnel; the cable is an electric energy or signal transmission device and generally consists of a plurality of wires or groups of wires; the cable bridge is divided into structures such as a groove type, a tray type, a ladder type and a grid type, and consists of a bracket, a supporting arm, an installation accessory and the like, the bridge in the building can be independently erected and also can be laid on various buildings, buildings and pipe gallery brackets, the characteristics of simple structure, attractive appearance, flexible configuration, convenient maintenance and the like are reflected, all parts are required to be galvanized and installed on the bridge outside the building in the open air; the cable bridge vertical shaft is a vertical channel for vertically running a power supply cable or a communication cable; the tunnel cable bridge shaft that has little occupation of land space is generally through bolt assembly connection when using the installation, this kind of connection mounting means can make the tunnel cable bridge shaft that occupies a small space very loaded down with trivial details when the installation or maintenance are dismantled, thereby can reduce the installation of the tunnel cable bridge shaft that occupies a small space and the work efficiency of dismantlement, the door plant of the tunnel cable bridge shaft that occupies a small space that has now simultaneously all adopts the side formula, this kind of mode of opening can occupy great usage space, and the tunnel inner space is limited, when the space that only supplies to use is less, the door plant of the tunnel cable bridge that occupies a small space will can't open, thereby will influence the use of the tunnel cable bridge shaft that occupies a small space.

Disclosure of Invention

The invention mainly aims to provide a tunnel cable bridge vertical shaft with small occupied space, which can effectively solve the problems in the background technology.

In order to achieve the purpose, the invention adopts the technical scheme that:

a tunnel cable bridge vertical shaft with small occupied space comprises a four-way structure, the lower end of the four-way structure is provided with a vertical shaft structure, the four-way structure and the vertical shaft structure are both provided with a connecting frame, the four-way structure and the vertical shaft structure are both provided with a connecting structure below the two connecting frames, two drawing protective doors are symmetrically arranged in the vertical shaft structure, four closing springs are symmetrically arranged in the vertical shaft structure at the upper side and the lower side of the two drawing protective doors, a closing magnet is arranged in each of the two drawing protective doors, four fixing structures are symmetrically arranged in each of the two connecting frames, the fixed structure comprises a fixed clamping plate, a push-pull column and a connecting pull block, wherein eight fixed springs are symmetrically arranged at the outer end of the fixed clamping plate in the two connecting frames.

Preferably, the upper end of cross-connection structure is provided with the connecting plate No. one, cross-connection structure's lower extreme is provided with the connecting plate No. two, a cavity has been seted up to the upper end of a connecting plate, a cavity runs through the upper end of a connecting plate, cross-connection structure and the lower extreme of No. two connecting plates each other, equal symmetry has been seted up No. four spread grooves, eight on a connecting plate and No. two connecting plates the equal symmetry of a spread groove is seted up in the outside of a cavity, eight the upper and lower both ends of a connecting plate and No. two connecting plates are run through respectively to a spread groove, two horizontal through-holes have been seted up to the symmetry on cross-connection structure's the outer wall.

Preferably, the upper end of the vertical shaft structure is provided with a third connecting plate, the lower end of the vertical shaft structure is provided with a fourth connecting plate, the upper end of the third connecting plate is provided with a second cavity, the second cavity penetrates the upper end of the third connecting plate, the vertical shaft structure and the lower end of the fourth connecting plate, four second connecting grooves are symmetrically arranged on the third connecting plate and the fourth connecting plate, eight second connecting grooves are symmetrically arranged on the outer side of the second cavity, the eight second connecting grooves respectively penetrate through the upper end and the lower end of the third connecting plate and the upper end and the lower end of the fourth connecting plate, one end of the vertical shaft structure is provided with a window, the window penetrates through the outer end of the vertical shaft structure and the second cavity, the door plate clamping grooves are formed in the inner wall of the window, two drawing clamping grooves are symmetrically formed in the inner walls of the left side and the right side of the door plate clamping grooves, and the door plate clamping grooves and the outer wall of the vertical shaft structure are all penetrated through by the drawing clamping grooves.

Preferably, two a mounting groove has been seted up on the linking frame respectively, two the linking frame is all installed respectively in cross-under structure and shaft structure through a mounting groove of seting up on it, two four connecting slot have all been seted up to the symmetry on the inner wall of linking frame, eight a storage groove has all been seted up on connecting slot's the inner wall, two four intercommunicating pores have all been seted up to the symmetry on the outer wall of linking frame, eight the intercommunicating pore runs through the outer wall and the eight storage grooves of two linking frames respectively.

Preferably, two a mounting groove No. two has all been seted up on the connection structure, two connection structure all installs respectively on cross structure and shaft structure through the mounting groove No. two that set up on it, two connection structure's the equal symmetry of lower extreme is provided with four connection picture pegs, eight a fixed slot, eight have all been seted up on the connection picture peg fixed slot runs through eight connection picture peg's inside and outside both ends respectively.

Preferably, two pull guard gate symmetry sets up in the door plant draw-in groove, two the equal symmetry in both ends about the pull guard gate is provided with two and blocks the fixture block, two the outer end of pull guard gate all is provided with a pull handle in the outside that is located the shaft structure, two a magnet mounting groove has all been seted up to the inner of pull guard gate.

Preferably, the four closing springs are symmetrically arranged in the door panel clamping groove and located on four outer sides of the blocking clamping blocks, the inner ends of the four closing springs are provided with a first stop block, and the outer ends of the four closing springs are provided with a second stop block.

Preferably, the two closed magnets are respectively installed in two magnet installation grooves formed in the inner ends of the two pull-out protection doors.

Preferably, the eight fixed clamping plates on the eight fixed structures are respectively arranged in eight connecting slots formed in the two connecting frames, the eight push-pull columns are respectively arranged at the outer ends of the eight fixed clamping plates, the eight push-pull columns are located in the eight communicating holes, the eight connecting pull blocks are respectively arranged at the outer ends of the eight push-pull columns, and the eight connecting pull blocks are located at the outer sides of the two connecting frames.

Preferably, sixteen fixing springs are symmetrically arranged in the eight accommodating grooves in pairs, and the sixteen fixing springs are symmetrically arranged on the left side and the right side of the eight push-pull columns in pairs.

Compared with the prior art, the invention has the following beneficial effects:

1. by arranging the connecting structure and the connecting frame and arranging the fixing spring and the fixing structure in the connecting frame, the complexity of mounting and dismounting the four-way structure and the vertical shaft structure can be simplified, and the mounting and dismounting efficiency of the four-way structure and the vertical shaft structure is improved;

2. by arranging the pull-type pull protection door, the space occupied by opening the pull protection door can be reduced;

3. the closing spring is arranged, so that the pull-out protective door can be closed conveniently;

4. by arranging the closing magnet, the pull-out protective door can be closed more tightly;

5. through set up a connecting plate, No. two connecting plates, No. three connecting plates, No. four connecting plates in cross structure and shaft structure, can be convenient for cooperate connection structure, splice frame, fixed spring, fixed knot construct with cross structure and shaft structrual installation together.

Drawings

Fig. 1 is a schematic view of the overall structure of a tunnel cable bridge shaft with small floor space according to the present invention;

FIG. 2 is a schematic structural diagram of a four-way structure of a tunnel cable bridge shaft with a small floor space according to the present invention;

fig. 3 is a schematic structural diagram of a shaft structure of a tunnel cable bridge shaft with small occupied space according to the invention;

fig. 4 is a schematic structural diagram of a connection frame of a tunnel cable bridge shaft with a small occupied space according to the present invention;

fig. 5 is a schematic structural diagram of a connection structure of a tunnel cable bridge shaft with small occupied space according to the invention;

FIG. 6 is a schematic structural view of a pull-out protection door and a closing magnet of a tunnel cable bridge shaft with a small floor space according to the present invention;

fig. 7 is a schematic view of a fixing structure of a tunnel cable bridge shaft with small floor space and a position relation structure of a fixing spring according to the invention.

In the figure: 1. a four-way structure; 2. a shaft structure; 3. a connecting frame; 4. a connecting structure; 5. pulling the protective door; 6. a closing spring; 7. closing the magnet; 8. a fixed structure; 9. fixing the spring; 10. a first connecting plate; 11. a second connecting plate; 12. a first cavity; 13. a first connecting groove; 14. a transverse through hole; 15. a third connecting plate; 16. a fourth connecting plate; 17. a cavity II; 18. a second connecting groove; 19. a window; 20. a door panel clamping groove; 21. drawing and pulling the clamping groove; 22. a first mounting groove; 23. connecting the slots; 24. a receiving groove; 25. a communicating hole; 26. mounting grooves II; 27. connecting the plugboards; 28. fixing the clamping groove; 29. blocking the fixture block; 30. a magnet mounting groove; 31. a first stop block; 32. a second stop block; 33. fixing the clamping plate; 34. pushing and pulling the column; 35. connecting a pulling block; 36. the handle is drawn.

Detailed Description

In order to make the technical means, the creation characteristics, the achievement purposes and the effects of the invention easy to understand, the invention is further described with the specific embodiments.

In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "front", "rear", "both ends", "one end", "the other end", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "disposed," "connected," and the like are to be construed broadly, such as "connected," which may be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

As shown in fig. 1-7, a tunnel cable bridge shaft with small floor space comprises a four-way structure 1, a shaft structure 2 is installed at the lower end of the four-way structure 1, a connecting frame 3 is installed on each of the four-way structure 1 and the shaft structure 2, a connecting structure 4 is installed below each of the two connecting frames 3 on each of the four-way structure 1 and the shaft structure 2, two pull-out protective doors 5 are symmetrically arranged inside the shaft structure 2, four closing springs 6 are symmetrically arranged inside the shaft structure 2 on the upper and lower sides of the two pull-out protective doors 5, a closing magnet 7 is arranged inside each of the two pull-out protective doors 5, four fixing structures 8 are symmetrically arranged inside each of the two connecting frames 3, each fixing structure 8 comprises a fixing clamping plate 33, push-pull post 34 and connect and draw piece 35, the outside end that is located fixed cardboard 33 of the inside of two connecting frames 3 all is provided with eight fixed springs 9 symmetrically.

In this embodiment, in order to facilitate the installation of the four-way structure 1 and the shaft structure 2, a first connecting plate 10 is arranged at the upper end of the four-way structure 1, a second connecting plate 11 is arranged at the lower end of the four-way structure 1, a first cavity 12 is arranged at the upper end of the first connecting plate 10, the upper end of the first connecting plate 10 is connected to the first cavity 12, the lower ends of the four-way structure 1 and the second connecting plate 11 are mutually penetrated, four first connecting grooves 13 are symmetrically arranged on the first connecting plate 10 and the second connecting plate 11, the eight first connecting grooves 13 are symmetrically arranged at the outer side of the first cavity 12, the eight first connecting grooves 13 are respectively penetrated through the upper ends and the lower ends of the first connecting plate 10 and the second connecting plate 11, and two transverse through holes 14 are symmetrically arranged on.

In this embodiment, in order to facilitate the installation of the four-way structure 1 and the shaft structure 2, a third connecting plate 15 is disposed at the upper end of the shaft structure 2, a fourth connecting plate 16 is disposed at the lower end of the shaft structure 2, a second cavity 17 is disposed at the upper end of the third connecting plate 15, the upper end of the shaft structure 2 and the lower end of the fourth connecting plate 16 are mutually penetrated by the second cavity 17, four second connecting grooves 18 are symmetrically disposed on the third connecting plate 15 and the fourth connecting plate 16, eight second connecting grooves 18 are symmetrically disposed at the outer side of the second cavity 17, the eight second connecting grooves 18 respectively penetrate the upper and lower ends of the third connecting plate 15 and the fourth connecting plate 16, a window 19 is disposed at one end of the shaft structure 2, the outer end of the shaft structure 2 and the second cavity 17 are penetrated by the window 19, a door panel clamping groove 20 is disposed on the inner wall of the window 19, two drawing clamping grooves 21 are symmetrically disposed on the inner walls of the, the two drawing slots 21 penetrate the door panel slot 20 through the outer wall of the shaft structure 2.

In this embodiment, in order to facilitate the installation of fixed spring 9 and fixed knot structure 8 to be fixed, two connection frames 3 have been set up, a mounting groove 22 has been seted up on two connection frames 3 respectively, two connection frames 3 are all installed respectively on four-way structure 1 and shaft structure 2 through a mounting groove 22 that set up on it, four connecting slot 23 have all been seted up to the equal symmetry on the inner wall of two connection frames 3, one has all been seted up on eight connecting slot 23's the inner wall and has been accomodate groove 24, four intercommunicating pore 25 have all been seted up to the equal symmetry on two connection frames 3's the outer wall, eight intercommunicating pore 25 run through two connection frames 3's outer wall and eight accomodate groove 24 respectively.

In this embodiment, in order to facilitate the installation and connection of the four-way structure 1 and the shaft structure 2, two connection structures 4 are provided, two mounting grooves 26 are all provided on two connection structures 4, two connection structures 4 are all respectively mounted on the four-way structure 1 and the shaft structure 2 through the two mounting grooves 26 provided thereon, four connection insertion plates 27 are symmetrically provided at the lower ends of two connection structures 4, one fixing slot 28 is provided on eight connection insertion plates 27, and the eight fixing slot 28 respectively penetrates through the inner ends and the outer ends of the eight connection insertion plates 27.

In this embodiment, open shared space for reducing pull guard gate 5, set up the pull guard gate 5 of two pull formulas, two pull guard gate 5 symmetries set up in door plant draw-in groove 20, and the equal symmetry in upper and lower both ends of two pull guard gate 5 is provided with two and blocks fixture block 29, and the outer end of two pull guard gate 5 all is provided with a pull handle 36 in the outside that is located shaft structure 2, and a magnet mounting groove 30 has all been seted up to the inner of two pull guard gate 5.

In this embodiment, in order to facilitate the closing of the pull-out protection door 5, four closing springs 6 are provided, the four closing springs 6 are symmetrically arranged in the door panel clamping groove 20 and located in four outer sides of the blocking blocks 29, the inner ends of the four closing springs 6 are provided with one first stop block 31, and the outer ends of the four closing springs 6 are provided with one second stop block 32.

In this embodiment, in order to facilitate the closing of the pull protection door 5, four closing magnets 7 are provided, and two closing magnets 7 are respectively installed in two magnet installation grooves 30 formed in the inner ends of the two pull protection doors 5.

In this embodiment, in order to facilitate the fixing of the connecting structure 4, eight fixing structures 8 are provided, eight fixing clamping plates 33 on the eight fixing structures 8 are respectively disposed in eight connecting slots 23 formed in the two connecting frames 3, eight push-pull columns 34 are respectively disposed at outer ends of the eight fixing clamping plates 33, the eight push-pull columns 34 are located in the eight communicating holes 25, eight connecting pull blocks 35 are respectively disposed at outer ends of the eight push-pull columns 34, and the eight connecting pull blocks 35 are located at outer sides of the two connecting frames 3.

In this embodiment, in order to facilitate the position restriction of the fixing structure 8, sixteen fixing springs 9 are provided, sixteen fixing springs 9 are symmetrically arranged in the eight accommodating grooves 24 in pairs, and sixteen fixing springs 9 are symmetrically arranged on the left and right sides of the eight push-pull columns 34 in pairs.

It should be noted that, when the tunnel cable bridge vertical shaft with small floor space is used and installed, firstly, the second connecting plate 11 at the lower end of the four-way structure 1 is contacted and aligned with the third connecting plate 15 at the upper end of the vertical shaft structure 2, then the connecting structure 4 installed on the four-way structure 1 is moved downwards, so that the four connecting plug boards 27 at the lower end of the connecting structure 4 penetrate through the four first connecting grooves 13 formed on the second connecting plate 11, then the connecting plug boards penetrate through the four second connecting grooves 18 formed on the third connecting plate 15, then the connecting frame 3 installed on the vertical shaft structure 2 is moved upwards, meanwhile, the four connecting pull blocks 35 thereon are pulled outwards, at the moment, the connecting pull blocks 35 drive the push-pull columns 34 to move outwards, the push-pull columns 34 drive the fixing clamping boards 33 to move outwards, and finally the fixing clamping boards 33 are collected into the collecting grooves 24, at the moment, the fixed spring 9 is compressed, when the connecting frame 3 is in contact with the lower end of the third connecting plate 15, the connecting frame 3 can be stopped moving, the connecting inserting plate 27 is positioned in the connecting slot 23 at the moment, then the connecting pulling block 35 is loosened, at the moment, the fixed spring 9 can push the fixed clamping plate 33 to move inwards, and finally the fixed clamping plate 33 is clamped in the fixed clamping slot 28; when the connection plug board is required to be detached, the connection pulling block 35 is pulled outwards to separate the fixed clamping board 33 from the fixed clamping groove 28, and then the connection structure 4 is moved upwards to separate the connection plug board 27 from the first connection groove 13 and the second connection groove 18; when pull guard gate 5 is opened to needs, only need grasp pull handle 36, after that can with its outside pulling, and when pull guard gate 5 need be closed, only need loosen pull handle 36, closed spring 6 can be close to two pull guard gates 5 each other this moment, finally make two closed magnet 7 adsorb together can.

The foregoing shows and describes the general principles and broad features of the present invention and advantages thereof. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims

1. The utility model provides a tunnel cable testing bridge shaft that occupation of land space is little which characterized in that: including cross structure (1), shaft structure (2) are installed to the lower extreme of cross structure (1), all install a connection frame (3) on cross structure (1) and shaft structure (2), a connection structure (4) is all installed in the below that is located two connection frames (3) on cross structure (1) and shaft structure (2), the inside symmetry of shaft structure (2) is provided with two pull guard gate (5), the inside of shaft structure (2) is provided with four closing spring (6) in the upper and lower bilateral symmetry that is located two pull guard gate (5), two the inside of pull guard gate (5) all is provided with a closed magnet (7), two the inside equal symmetry of connection frame (3) is provided with four fixed knot constructs (8), fixed knot constructs (8) contain fixed cardboard (33) Push away and draw post (34) and connect and draw piece (35), two the inside of connecting frame (3) is all provided with eight fixed spring (9) in the outer end that is located fixed cardboard (33) symmetrically.

2. A tunnel cable tray shaft of claim 1, wherein said shaft further comprises: the upper end of cross structure (1) is provided with connecting plate (10) No. one, the lower extreme of cross structure (1) is provided with connecting plate (11) No. two, cavity (12) have been seted up to the upper end of connecting plate (10), cavity (12) run through the lower extreme of upper end, cross structure (1) and No. two connecting plates (11) of connecting plate (10) each other, equal symmetry has been seted up No. four spread groove (13) on connecting plate (10) and No. two connecting plates (11), eight the outside at cavity (12) is seted up to equal symmetry in a spread groove (13), eight run through the upper and lower both ends of connecting plate (10) and No. two connecting plates (11) respectively No. one spread groove (13), two horizontal through-hole (14) have been seted up to the symmetry on the outer wall of cross structure (1).

3. The tunnel cable bridge shaft with small floor space of claim 2, wherein: the upper end of the vertical shaft structure (2) is provided with a third connecting plate (15), the lower end of the vertical shaft structure (2) is provided with a fourth connecting plate (16), the upper end of the third connecting plate (15) is provided with a second cavity (17), the upper end of the third connecting plate (15), the lower end of the vertical shaft structure (2) and the lower end of the fourth connecting plate (16) are mutually penetrated through by the second cavity (17), the third connecting plate (15) and the fourth connecting plate (16) are symmetrically provided with four second connecting grooves (18), eight second connecting grooves (18) are symmetrically arranged on the outer side of the second cavity (17), the eight second connecting grooves (18) respectively penetrate through the upper end and the lower end of the third connecting plate (15) and the upper end and the lower end of the fourth connecting plate (16), one end of the vertical shaft structure (2) is provided with a window (19), and the outer end of the vertical shaft structure (2) and the second cavity (17) are penetrated through by the window (19, the door plate clamping groove (20) is formed in the inner wall of the window (19), the two drawing clamping grooves (21) are symmetrically formed in the inner walls of the left side and the right side of the door plate clamping groove (20), and the two drawing clamping grooves (21) penetrate through the door plate clamping groove (20) and the outer wall of the vertical shaft structure (2).

4. A tunnel cable tray shaft of claim 3, wherein said shaft further comprises: two seted up one mounting groove (22) on linking frame (3) respectively, two all install respectively on cross structure (1) and shaft structure (2) through mounting groove (22) of seting up on it in linking frame (3), two four connecting slot (23), eight equal symmetry has been seted up on the inner wall of linking frame (3) one has all been seted up on the inner wall of connecting slot (23) and has been accomodate groove (24), two equal symmetry has been seted up on the outer wall of linking frame (3) four intercommunicating pore (25), eight intercommunicating pore (25) are run through with the outer wall and the eight groove (24) of accomodating of two linking frame (3) respectively.

5. A tunnel cable tray shaft of claim 4, wherein said shaft further comprises: two mounting groove (26) No. two have all been seted up on connection structure (4), two connection structure (4) are all installed respectively on cross structure (1) and shaft structure (2) through mounting groove (26) No. two of seting up on it, two the equal symmetry of lower extreme of connection structure (4) is provided with four connection picture peg (27), eight connection picture peg (27) are gone up and have all been seted up one fixed slot (28), eight fixed slot (28) run through the inside and outside both ends of eight connection picture peg (27) respectively.

6. The tunnel cable bridge shaft with small floor space of claim 5, wherein: two pull guard gate (5) symmetry sets up in door plant draw-in groove (20), two the upper and lower both ends of pull guard gate (5) are all the symmetry and are provided with two and block fixture block (29), two the outer end of pull guard gate (5) all is provided with one pull handle (36) in the outside that is located shaft structure (2), two a magnet mounting groove (30) have all been seted up to the inner of pull guard gate (5).

7. A tunnel cable tray shaft of claim 6, wherein said shaft further comprises: four closing spring (6) symmetry sets up in door plant draw-in groove (20) and is located four outsides that stop fixture block (29), four the inner of closing spring (6) all is provided with a dog (31), four the outer end of closing spring (6) all is provided with a dog (32) No. two.

8. A tunnel cable tray shaft of claim 7, wherein said shaft further comprises: the two closed magnets (7) are respectively arranged in two magnet mounting grooves (30) formed at the inner ends of the two drawing protective doors (5).

9. A tunnel cable tray shaft of claim 8, wherein said shaft further comprises: eight fixed cardboard (33) on fixed knot constructs (8) set up respectively in eight connecting slot (23) of seting up on two connection frame (3), eight push and pull post (34) set up respectively in the outer end of eight fixed cardboard (33), eight push and pull post (34) are lieing in eight intercommunicating pore (25), eight connect and draw piece (35) to set up respectively in the outer end of eight push and pull post (34), eight connect and draw piece (35) to lie in two the outside of connection frame (3).

10. A tunnel cable tray shaft of claim 9, wherein said shaft further comprises: sixteen fixing springs (9) are symmetrically arranged in the eight accommodating grooves (24) in pairs, and sixteen fixing springs (9) are symmetrically arranged on the left side and the right side of the eight push-pull columns (34) in pairs.