Multi-working-face construction ventilation structure of diversion tunnel

Abstract

The utility model provides a diversion tunnel multi-working face construction ventilation structure which comprises a plurality of first draught fans and second draught fans which are arranged at the opening of a construction adit, and the construction adit is connected with a plurality of diversion tunnels. An isolation structure is arranged in the diversion tunnel and is close to the tunnel face of the diversion tunnel; the isolation structure comprises a partition plate arranged in the diversion tunnel, and a door opening is formed in the bottom end of the partition plate. A telescopic pipe is arranged on the partition plate and connected with the first draught fan and the second draught fan through ventilation pipelines. A guide mechanism is arranged on the partition plate and used for guiding the telescopic pipe to stretch out and draw back. According to the ventilation device, ventilation can be conveniently carried out on multiple working faces of the parallel diversion tunnel, the problem of unsmooth ventilation is avoided, and the working safety of workers is guaranteed; in the operation process, along with tunneling of the diversion tunnel, the isolation structure can advance, and therefore the ventilation effect can be ensured.

Description

TECHNICAL FIELD

[0001] The utility model relates to diversion tunnel multi operation face construction technical field, concretely relates to a diversion tunnel multi operation face construction ventilation structure. BACKGROUND

[0002] The diversion tunnel is a tunnel used for diversion construction, and is mainly used for river valleys with narrow valleys and steep banks in mountainous areas, and is often used in hydropower engineering.

[0003] In order to shorten the construction period of the diversion tunnel, construction branch holes are usually arranged to increase the working face to realize short construction of long holes.

[0004] However, the multi operation face construction is difficult to ventilate, and during the construction process, especially during the drilling and blasting process, the blasting smoke, dust and toxic and harmful gases directly diffuse in the whole tunnel, cover a large area, and the workers are not convenient to evacuate, which is dangerous and difficult to ventilate. UTILITY MODEL CONTENT

[0005] The main purpose of the utility model is to provide a diversion tunnel multi operation face construction ventilation structure, which solves the problems of serious construction environment pollution in the diversion tunnel and difficult ventilation of the parallel diversion tunnel multi operation face.

[0006] To solve the above technical problems, the technical scheme adopted by the utility model is:

[0007] A diversion tunnel multi operation face construction ventilation structure, comprising a plurality of first fans and second fans arranged at the entrances of construction branch holes, and the construction branch holes are connected with a plurality of diversion tunnels;

[0008] The first fan is provided with a main exhaust pipe, and the main exhaust pipe is connected with a plurality of branch exhaust pipes through a connecting head;

[0009] The second fan is provided with a main air inlet pipe, and the main air inlet pipe is connected with a plurality of branch air inlet pipes through a connecting head;

[0010] The diversion tunnel is provided with a separation structure, the separation structure is close to the tunnel face of the diversion tunnel, and the branch air inlet pipe and the branch exhaust pipe are connected with the separation structure.

[0011] In the preferred scheme, the branch air inlet pipe and the branch exhaust pipe are provided with valves, the branch air inlet pipe sends fresh air into the diversion tunnel, and the branch exhaust pipe exhausts the dirty air in the diversion tunnel.

[0012] In the preferred scheme, the separation structure comprises a partition plate arranged in the diversion tunnel, the bottom end of the partition plate is provided with a door hole, and the bottom of the partition plate is provided with a walking frame.

[0013] The partition plate is provided with an exhaust pipe connecting pipe, and the exhaust pipe connecting pipe is connected with branch exhaust pipes through an extension pipe;

[0014] The partition plate is provided with an air inlet pipe connecting pipe, and the air inlet pipe connecting pipe is connected with branch air inlet pipes through an extension pipe;

[0015] The partition plate is provided with an air outlet hole, and the air outlet hole is communicated with the air inlet pipe connecting pipe;

[0016] The partition plate is provided with a guide mechanism for guiding the extension and retraction of the extension pipe.

[0017] In the preferred scheme, the walking frame comprises a base fixed to the bottom of the partition plate, and the base is provided with a wheel groove and a walking wheel in the wheel groove;

[0018] The base is provided with a positioning hole;

[0019] The base is provided with a protective plate on the side close to the working face.

[0020] In the preferred scheme, the air inlet pipe connecting pipe is provided with a through hole;

[0021] The air outlet hole comprises a cavity in the partition plate, the cavity is communicated with the through hole, the edge of the partition plate is provided with a plurality of first air holes, and the side of the partition plate away from the working face is provided with a plurality of second air holes;

[0022] The air inlet pipe connecting pipe is provided with a flow guide cylinder, and the flow guide cylinder is a tapered cylinder with both ends communicated.

[0023] In the preferred scheme, the guide mechanism comprises a plurality of support rods fixedly connected with the partition plate, and the support rods are located above the exhaust pipe connecting pipe and the air inlet pipe connecting pipe;

[0024] A sliding sleeve is slidably connected to the support rod, and the side of the extension pipe away from the partition plate is fixedly connected with the sliding sleeve through a connecting rod;

[0025] The end of the support rod away from the partition plate is provided with a fixed block, and a pull rope is arranged between the fixed block and the partition plate.

[0026] In the preferred scheme, a plurality of rolling balls are arranged between the sliding sleeve and the support rod.

[0027] In the preferred scheme, the bottom of the extension pipe is provided with a fixed sleeve, a threaded rod is screw-connected in the fixed sleeve, a knob is arranged at the bottom of the threaded rod, a stabilizing block is arranged at the top of the threaded rod, and the stabilizing block extends to the inner wall of the extension pipe;

[0028] The branch air inlet pipe or the branch exhaust pipe extends into the interior of the extension pipe, and the stabilizing block abuts against the branch air inlet pipe or the branch exhaust pipe.

[0029] The utility model provides a kind of diversion tunnel multi-operation face construction ventilation structure, by using above scheme, with following beneficial effects:

[0030] 1. The parallel diversion tunnel is convenient for ventilation of multiple operation surfaces, avoids poor ventilation, and ensures the operation safety of workers.

[0031] 2. In the operation process, the isolation structure can follow the diversion tunnel excavation, thereby ensuring the ventilation effect and reducing the diffusion of dust.

[0032] 3. In the process of moving the isolation structure, the stability of the ventilation pipe can be ensured, thereby ensuring stable ventilation. BRIEF DESCRIPTION OF DRAWINGS

[0033] The utility model will be further described in connection with the drawings and embodiments:

[0034] Figure 1 It is the structure schematic view of the utility model;

[0035] Figure 2 It is the structure schematic view of the isolation structure of the utility model;

[0036] Figure 3 It is the structure schematic view of the walking frame of the utility model;

[0037] Figure 4 It is the structure schematic view of the air outlet of the utility model;

[0038] Figure 5 It is the side view structure schematic view of the air inlet pipe connecting pipe of the utility model;

[0039] Figure 6 It is the structure schematic view of the telescopic pipe of the utility model.

[0040] In the drawing:

[0041] First fan 1, main exhaust pipe 101, branch exhaust pipe 102, dirty air 103, second fan 2, main air inlet pipe 201, branch air inlet pipe 202, fresh air 203, construction branch hole 301, diversion tunnel 302, working face 303, connecting head 4, valve 5, isolation structure 6, baffle 601, guide mechanism 602, support rod 621, sliding sleeve 622, connecting rod 623, fixed block 624, pull rope 625, rolling ball 626, walking frame 603, base 631, wheel groove 632, walking wheel 633, positioning hole 634, protection plate 635, door hole 604, air outlet 605, cavity 651, first air hole 652, second air hole 653, exhaust pipe connecting pipe 606, air inlet pipe connecting pipe 607, via hole 671, diversion cylinder 672, telescopic pipe 7, fixed sleeve 701, threaded rod 702, stabilizing block 703, knob 704. DETAILED DESCRIPTION

[0042] In the embodiments of the present application, as shown in Figures 1-6 The first fan 1 is used for discharging dirty air 103 in the diversion tunnel 302, and the second fan 2 is used for conveying fresh air 203 into the tunnel. The first fan 1 and the second fan 2 are preferably axial flow fans.

[0043] The first fan 1 is provided with a main exhaust pipe 101, and the main exhaust pipe 101 is connected with a plurality of branch exhaust pipes 102 through a connecting head 4. The second fan 2 is provided with a main air inlet pipe 201, and the main air inlet pipe 201 is connected with a plurality of branch air inlet pipes 202 through a connecting head 4. The branch air inlet pipe 202 and the branch exhaust pipe 102 are provided with a valve 5. The branch air inlet pipe 202 sends fresh air 203 into the diversion tunnel 302, and the branch exhaust pipe 102 discharges dirty air in the diversion tunnel 302. The main exhaust pipe 101, the branch exhaust pipe 102, the main air inlet pipe 201 and the branch air inlet pipe 202 are combined into a ventilation pipeline.

[0044] In a preferred scheme, an isolation structure 6 is arranged in the diversion tunnel. The isolation structure 6 is close to the tunnel face 303. The branch air inlet pipe 202 and the branch exhaust pipe 102 are connected with the isolation structure 6.

[0045] Specifically, the isolation structure 6 includes a partition plate 601 arranged in the diversion tunnel. The bottom end of the partition plate 601 is provided with a door opening 604. A door is arranged in the door opening 604 as needed for workers to enter and exit. In the blasting construction such as drilling and blasting construction to the tunnel face, especially in mechanical operation or explosive blasting, the construction personnel can hide behind the partition plate 601. Through the partition plate 601, not only can the dust and the like be prevented from spreading in the diversion tunnel, but also the flying stones and other sundries in the construction process can be effectively blocked.

[0046] The bottom of the partition plate 601 is provided with a walking frame 603. Specifically, the walking frame 603 includes a base 631 fixed to the bottom of the partition plate 601. The base 631 is provided with a wheel groove 632. A walking wheel 633 is arranged in the wheel groove 632. The walking wheel 633 is made of high-strength and wear-resistant material to ensure stable operation in the long-term and frequent moving process. The base 631 is provided with a positioning hole 634. After the position of the partition plate 601 is determined, an existing rod body can be inserted into the ground through the positioning hole 634 to complete the fixing. The specific selection is based on the actual needs. The side of the base 631 close to the tunnel face 303 is provided with a protective plate 635. The protective plate 635 is made of high-strength and impact-resistant material, which can effectively block the flying stones, sundries and the like in the construction process to avoid damage to the walking frame 603.

[0047] The partition plate 601 is provided with an exhaust pipe connecting pipe 606 connected with the branch exhaust pipe 102 through the telescopic pipe 7; the partition plate 601 is provided with an air inlet pipe connecting pipe 607 connected with the branch air inlet pipe 202 through the telescopic pipe 7; the telescopic pipe 7 is preferably a zippered flexible air pipe.

[0048] The partition plate 601 is provided with an air outlet hole 605 in communication with the air inlet pipe connecting pipe 607. The air inlet pipe connecting pipe 607 is provided with a through hole 671; the air outlet hole 605 comprises a cavity 651 arranged inside the partition plate 601, the cavity 651 being in communication with the through hole 671, and the partition plate 601 is provided with a plurality of first air holes 652 at the edge thereof, and a plurality of second air holes 653 are arranged on the side of the partition plate 601 away from the tunnel face 303.

[0049] After the fresh air enters the cavity 651 through the air inlet pipe connecting pipe 607, part of the fresh air enters the edge of the partition plate 601 through the first air holes 652, and the other part of the fresh air enters the area of the diversion hole away from the tunnel face 303 through the second air holes 653, which not only provides fresh air in time and in sufficient quantity for the construction personnel on the tunnel face 303 to protect the respiratory health of the construction personnel, but also promotes the overall circulation of the air in the hole.

[0050] The air inlet pipe connecting pipe 607 is provided with a diversion cylinder 672, which is a conical cylinder with both ends in communication, part of the fresh air is guided into the cavity 651 through the diversion cylinder 672, and the other part of the fresh air enters the position close to the tunnel face 303 in the diversion hole through the diversion cylinder 672 to ventilate the position close to the tunnel face 303.

[0051] In a further embodiment, the partition plate 601 is provided with a guiding mechanism 602 for guiding the telescopic pipe 7 to extend and retract.

[0052] Specifically, the guiding mechanism 602 comprises a plurality of support rods 621 fixedly connected with the partition plate 601, and the support rods 621 are located above the exhaust pipe connecting pipe 606 and the air inlet pipe connecting pipe 607;

[0053] The support rods 621 are slidably connected with a sliding sleeve 622, and a plurality of rolling balls 626 are arranged between the sliding sleeve 622 and the support rods 621; the side of the telescopic pipe 7 away from the partition plate 601 is fixedly connected with the sliding sleeve 622 through a connecting rod 623; one end of the support rod 621 away from the partition plate 601 is provided with a fixed block 624, and a pull rope 625 is arranged between the fixed block 624 and the partition plate 601, the end of the support rod 621 is pulled through the pull rope 625 to increase the supporting force.

[0054] In use, the branch exhaust duct 102 and the branch air inlet duct 202 are connected in the hole in the prior art manner, after being connected with the telescopic pipe 7, as the construction proceeds, the partition plate 601 follows the advance, at this time, the telescopic pipe 7 is synchronously elongated, after being elongated to the limit length, the connection between the telescopic pipe 7 and the branch exhaust duct 102 and the branch air inlet duct 202 is cancelled, then the telescopic pipe 7 is contracted to the shortest state, then the new branch exhaust duct 102 and the branch air inlet duct 202 are connected between the branch exhaust duct 102 and the branch air inlet duct 202 and the telescopic pipe 7, and then the above operation is repeated, so that the isolation structure 6 can be moved along with the construction of the diversion tunnel 302, and different working environments can be adapted.

[0055] During the elongation of the telescopic pipe 7, the connecting rod 623 and the sliding sleeve 622 are synchronously moved, the sliding sleeve 622 slides on the supporting rod 621, and the supporting rod 621 supports the telescopic pipe 7, so that the stability of the telescopic pipe 7 is ensured.

[0056] In the preferred scheme, the bottom of the telescopic pipe 7 is provided with a fixing sleeve 701, a threaded rod 702 is threadedly connected in the fixing sleeve 701, a knob 704 is arranged at the bottom of the threaded rod 702, and a stabilizing block 703 is arranged at the top of the threaded rod 702 and extends to the inner wall of the telescopic pipe 7.

[0057] The branch air inlet duct 202 or the branch exhaust duct 102 extends into the interior of the telescopic pipe 7, and the stabilizing block 703 abuts against the branch air inlet duct 202 or the branch exhaust duct 102.

[0058] When the branch air inlet duct 202 and the branch exhaust duct 102 are connected, the branch air inlet duct 202 or the branch exhaust duct 102 extends into the interior of the telescopic pipe 7, then the knob 704 is twisted to drive the threaded rod 702 to rotate, so that the stabilizing block 703 is moved and abuts against the branch air inlet duct 202 or the branch exhaust duct 102, and the connection between the telescopic pipe 7 and the branch air inlet duct 202 or the branch exhaust duct 102 is completed, and vice versa, so that the connection can be disassembled, and the operation is simple and convenient for disassembly and assembly.

[0059] The above embodiment is only a preferred technical scheme of the utility model, and should not be regarded as a limitation on the utility model, and the protection scope of the utility model should be the technical scheme recorded in the claims, including the equivalent replacement scheme of the technical features in the technical scheme recorded in the claims as the protection scope. That is, the equivalent replacement improvement in this range is also within the protection scope of the utility model.

Claims

1. A diversion tunnel multi-workface construction ventilation structure, characterized in that: The first fan (1) and the second fan (2) are arranged at the construction branch hole (301) opening, and the construction branch hole (301) is connected with the diversion hole (302); The isolation structure (6) is arranged in the diversion hole (302); The isolation structure (6) comprises a partition plate (601) arranged in the diversion hole (302), and the bottom end of the partition plate (601) is provided with a door opening (604); The partition plate (601) is provided with an expansion pipe (7), and the expansion pipe (7) is connected with the first fan (1) and the second fan (2) through the ventilation pipeline; The partition plate (601) is provided with a guide mechanism (602), and the guide mechanism (602) is used for guiding the expansion pipe (7) to expand and contract.

2. The ventilation structure for multi-workface construction of a diversion tunnel according to claim 1, characterized in that: The first fan (1) is provided with a main exhaust pipe (101), and the main exhaust pipe (101) is connected with a plurality of branch exhaust pipes (102) through a connecting head (4); The second fan (2) is provided with a main air inlet pipe (201), and the main air inlet pipe (201) is connected with a plurality of branch air inlet pipes (202) through the connecting head (4); The ventilation pipeline comprises the main exhaust pipe (101), the branch exhaust pipe (102), the main air inlet pipe (201) and the branch air inlet pipe (202); The branch air inlet pipe (202) and the branch exhaust pipe (102) are provided with a valve (5), the branch air inlet pipe (202) sends fresh air (203) into the diversion hole (302), and the branch exhaust pipe (102) exhausts the dirty air in the diversion hole (302).

3. The ventilation structure for multi-slope construction of a diversion tunnel according to claim 1, characterized in that: The bottom of the partition plate (601) is provided with a walking frame (603); The partition plate (601) is provided with an exhaust pipe connecting pipe (606), and the exhaust pipe connecting pipe (606) is connected with the branch exhaust pipe (102) through the expansion pipe (7); The partition plate (601) is provided with an air inlet pipe connecting pipe (607), and the air inlet pipe connecting pipe (607) is connected with the branch air inlet pipe (202) through the expansion pipe (7); The partition plate (601) is provided with an air outlet hole (605), and the air outlet hole (605) is in communication with the air inlet pipe connecting pipe (607).

4. The ventilation structure for multi-slope construction of a diversion tunnel according to claim 3, characterized in that: The walking frame (603) comprises a base (631) fixed to the bottom of the partition plate (601), and the base (631) is provided with a wheel groove (632) and a walking wheel (633); The base (631) is provided with a positioning hole (634); The base (631) is provided with a protection plate (635) on the side close to the working face (303).

5. The ventilation structure for multi-slope construction of a diversion tunnel according to claim 3, characterized in that: The air inlet pipe connecting pipe (607) is provided with a through hole (671); The air outlet hole (605) comprises a cavity (651) arranged in the partition plate (601), the cavity (651) is in communication with the through hole (671), the partition plate (601) is provided with a plurality of first air holes (652) at the edge, and the partition plate (601) is provided with a plurality of second air holes (653) on the side away from the working face (303); The air inlet pipe connecting pipe (607) is provided with a flow guide cylinder (672), and the flow guide cylinder (672) is a tapered cylinder with two ends in communication.

6. The ventilation structure for multi-workface construction of a diversion tunnel according to claim 3, characterized in that: The guide mechanism (602) comprises a plurality of support rods (621) fixedly connected with the partition plate (601), and the support rods (621) are located above the exhaust pipe connecting pipe (606) and the air inlet pipe connecting pipe (607); A sliding sleeve (622) is slidably connected on the support rod (621), and the telescopic pipe (7) is fixedly connected with the sliding sleeve (622) through a connecting rod (623) away from the partition plate (601); One end of the support rod (621) away from the partition plate (601) is provided with a fixed block (624), and a pull rope (625) is arranged between the fixed block (624) and the partition plate (601).

7. The ventilation structure for multi-slope construction of a diversion tunnel according to claim 5, characterized in that: A plurality of rolling balls (626) are arranged between the sliding sleeve (622) and the support rod (621).

8. The ventilation structure for multi-slope construction of a diversion tunnel according to claim 5, characterized in that: The bottom of the telescopic pipe (7) is provided with a fixed sleeve (701), a threaded rod (702) is screwedly connected in the fixed sleeve (701), the bottom of the threaded rod (702) is provided with a knob (704), the top of the threaded rod (702) is provided with a stabilizing block (703), and the stabilizing block (703) extends to the inner wall of the telescopic pipe (7); The branch air inlet pipe (202) or the branch air outlet pipe (102) extends into the inside of the telescopic pipe (7), and the stabilizing block (703) abuts against the branch air inlet pipe (202) or the branch air outlet pipe (102).

Images