Downhill stepping device of heading machine trailer

Abstract

The utility model discloses a downhill stepping device for a heading machine trailer, which solves the problem that the heading machine trailer in the prior art is low in stepping efficiency along with a main engine. The downhill stepping device of the heading machine trailer comprises a dragging telescopic piece arranged between a heading machine main machine and the trailer, one end of the dragging telescopic piece is hinged to the heading machine main machine, and the other end of the dragging telescopic piece is connected with the trailer through a lifting adjusting mechanism. The dragging telescopic piece is matched with the lifting adjusting mechanism to adjust the angle of the trailer relative to the tunnel axis. The dragging telescopic piece is matched with the lifting adjusting mechanism to adjust the angle of the trailer relative to the axis of the tunnel, so that the stress condition of the dragging telescopic piece is adjusted, and the walking beam of the erector is protected. The height difference between the trailer and the ground is compensated through the connecting support, so that the trailer can be placed on the ground to advance along with a main machine, the overhead laying time is saved, and the whole heading machine can efficiently step.

Description

Technical Field

[0001] The utility model relates to the technical field of tunnel boring machines, in particular to a downhill device for a tunnel boring machine trailer. Background Art

[0002] The advancement of the tunnel boring machine trailer is a key step in the advancement and starting of the entire tunnel boring machine. At present, the method of advancing the tunnel boring machine trailer is generally an elevated stepping method, that is, the tunnel boring machine trailer is placed on the track of a fixed bracket, and connected to the towing cylinder of the tunnel boring machine main machine, so that the tunnel boring machine trailer follows the main machine to step to the starting section; this method is suitable for horizontal short-distance stepping and has high requirements for the starting site; during the advancement of the tunnel boring machine trailer, the trailer track and bracket need to be continuously dismantled, reversed, installed and fixed from back to front (in the direction of the tunnel boring machine), which reduces the construction efficiency.

[0003] In recent years, with the widespread application of tunnel boring machines in the fields of energy, water conservancy, mining, etc., the stepping operation conditions faced by tunnel boring machines have become more complex and changeable. In particular, the conditions in which tunnel boring machines encounter long-distance and large downhill stepping have generally increased, and research on tunnel boring machine downhill stepping has gradually emerged. For example, the Chinese patent with publication number CN116084966A discloses a tunnel boring machine downhill stepping device and a tunnel boring machine downhill stepping method. However, this method mainly introduces the downhill stepping method and device of the tunnel boring machine main body, lacks the design of efficient long-distance stepping of the tunnel boring machine trailer, and lacks similar case experience. In the downhill stepping of the tunnel boring machine, the key factor restricting the efficiency of the stepping is the reverse transportation and laying of the trailer track; the stepping process requires the elevated platform to be reversed from the back to the front; the elevated reverse transportation path is narrow and the transportation speed is slow; after being reversed to the front of trailer No. 1, it needs to be welded and fixed, and the working cycle is long; therefore, in order to achieve long-distance and efficient downhill stepping of the tunnel boring machine, a stepping method that does not require the support of the elevated platform is needed. Traditional overhead support methods are adequate for short-distance stepping of small-section tunnel boring machines, but their efficiency slows significantly when used for long-distance stepping of large-section tunnel boring machines. Therefore, it is necessary to design a method and device for efficient downhill stepping of tunnel boring machine trailers over long distances. Utility Model Content

[0004] In view of the deficiencies in the above-mentioned background technology, the present invention proposes a downhill stepping device for a roadheader trailer, which solves the problem of low stepping efficiency of the roadheader trailer following the main machine in the prior art.

[0005] The technical solution of the present utility model is implemented as follows: a downhill stepping device for a tunnel boring machine trailer, comprising a pulling telescopic member arranged between the tunnel boring machine main body and the trailer, one end of the pulling telescopic member being hinged to the tunnel boring machine main body, and the other end being connected to the trailer via a lifting adjustment mechanism; the pulling telescopic member cooperates with the lifting adjustment mechanism to adjust the angle of the trailer relative to the tunnel axis. The pulling telescopic member is a pulling oil cylinder or a pulling air cylinder, and the pulling telescopic member is preferably a pulling oil cylinder. During the downhill process of the tunnel boring machine, the tunnel boring machine steps downhill via a stepping frame, and the pulling oil cylinder drives the trailer as a whole to step forward; during the downhill process, the angle of the trailer relative to the tunnel axis is adjusted by the pulling oil cylinder in cooperation with the lifting adjustment mechanism. When the trailer as a whole climbs uphill, its installation position is moved down to improve the stress condition of the tractor structure and protect the walking beam of the assembly machine.

[0006] Further preferably, a first ear seat is provided at the tail of the tunnel boring machine main body, and the towing telescopic member is hinged to the first ear seat.

[0007] Further preferably, the lifting adjustment mechanism includes a connecting bracket fixed on the trailer, the connecting bracket is provided with a detachable adjusting member, and the adjusting member is hinged to the towing telescopic member.

[0008] As a first preferred method, the adjusting part is a movable ear seat, and a plurality of adjustment holes arranged in an upper and lower row are provided on the connecting bracket. The movable ear seat can be connected with the adjustment holes of different heights through a bolt member, and a mounting hole is provided on the movable ear seat; the dragging and telescopic part can be connected to the mounting hole through a pin shaft or a bolt.

[0009] As a second preferred method, the adjusting part is a disc seat, a rotating shaft is provided at the center of the disc seat, the rotating shaft is rotatably set on the front end face of the connecting bracket, an eccentrically set connecting hole is provided on the disc seat, and the pulling and telescopic part is connected to the connecting hole through a pin or bolt connection.

[0010] Further preferably, one end of the rotating shaft is fixedly connected to the disc seat and the other end is provided with a rotating handle. A positioning plate is provided on the side of the connecting bracket corresponding to the rotating handle. The positioning plate is provided with several fixing screw holes, and the rotating handle is provided with fixing bolts that match the fixing screw holes.

[0011] As a third preferred method, the adjusting member is a connecting seat, which is fixed to the front end of the connecting bracket by a bolt. An arc groove is provided on the connecting seat, and the pulling and retracting member is connected to the arc groove by a pin or bolt.

[0012] Preferably, the trailer is provided with a wheelset at the bottom, which cooperates with a gradient track laid in the tunnel. The gradient track includes an initial gradient track and a lifting ramp, and the initial gradient track and the lifting ramp are smoothly connected to ensure that the trailer can descend stably.

[0013] The beneficial effects of the present invention are as follows: the towing telescopic member of the present invention cooperates with the lifting adjustment mechanism to adjust the angle of the trailer relative to the tunnel axis, thereby adjusting the stress of the towing telescopic member and protecting the walking beam of the assembly machine. The present invention compensates for the height difference between the trailer and the ground by connecting the bracket, so that the trailer can be placed on the ground and follow the main machine, saving the time of overhead laying and allowing the tunnel boring machine to move efficiently as a whole. The present invention has a simple structure and strong practicality. During the downhill process, by changing the installation site height of the towing telescopic member and the adjustment member, the axis of the towing cylinder is close to or coincides with the tunnel axis, balancing the stress, so that the trailer can be placed on the ground and follow the main machine, and at the same time has the ability to be lifted back to the height of the tunnel axis, further improving construction efficiency and construction safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0015] Figure 1 This is a schematic diagram of the downhill stepping structure of the tunnel boring machine of the utility model;

[0016] Figure 2 This is a schematic diagram of the lifting adjustment mechanism of Example 2;

[0017] Figure 3 This is a schematic diagram of the initial lifting steps of the tunneling trailer;

[0018] Figure 4 This is a schematic diagram of the step-by-step lifting of the tunneling trailer;

[0019] Figure 5 This is a schematic diagram of the end point of the tunneling trailer lift;

[0020] Figure 6 This is a schematic diagram of the lifting adjustment mechanism of Example 3;

[0021] Figure 7 This is a top view of the lifting and adjusting mechanism of Example 3;

[0022] Figure 8 Schematic diagram of the lifting and adjusting mechanism of Example 4. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0024] like Figure 1 As shown in Example 1, a downhill stepping device for a tunnel boring machine trailer includes a telescopic traction member 3 disposed between the tunnel boring machine main body 1 and the trailer 7. The telescopic traction member 3 is a traction oil cylinder or a traction air cylinder, preferably a traction oil cylinder. One end of the telescopic traction member 3 is hinged to the tunnel boring machine main body 1, and the other end is connected to the trailer 7 via a lifting adjustment mechanism. The lower portion of the trailer 7 is provided with a wheelset 6, which cooperates with a variable slope track 8 laid in the tunnel. The telescopic traction member 3 cooperates with the lifting adjustment mechanism to adjust the angle of the trailer 7 relative to the tunnel axis, thereby adjusting the force applied to the telescopic traction member and protecting the assembly machine's walking beam.

[0025] During the downhill movement of the TBM, the machine uses a walking frame 9 installed in the tunnel to move downhill. The walking frame 1 is a movable walking frame that moves with the TBM mainframe during the movement. A walking groove is provided in the tunnel, located on the ground walking axis. This groove limits the walking frame from straying left or right during the movement of the TBM and provides guidance for the TBM's movement. The towing cylinder drives the trailer as a whole to move along the variable-slope track 8 installed in the tunnel. The variable-slope track 8 includes an initial starting track 81 and a lifting ramp 82. The initial starting track 81 and the lifting ramp 82 are smoothly connected. From the initial starting track 81 to the lifting ramp 82, the track height changes, and the trailer is lifted. During the downhill process, the angle of the trailer relative to the tunnel axis is adjusted by the towing cylinder in conjunction with the lifting adjustment mechanism. That is, when the trailer climbs uphill as a whole, from the initial starting track 81 to the lifting ramp 82, the upward swing angle of the towing telescopic part 3 becomes larger, and then by moving its installation position on the lifting adjustment mechanism downward, the force condition of the tractor structure is improved, thereby solving the problem of low stepping efficiency of the tunnel boring machine trailer following the main machine in the prior art.

[0026] In this embodiment, a first lug 2 is provided at the rear of the tunnel boring machine mainframe 1. This lug 2 is welded to the mainframe and is used to mount a towing cylinder. A towing telescopic member 3 is hingedly connected to the first lug 2. Specifically, the towing telescopic member 3, or the towing cylinder, is connected to the first lug via a pin, and the connection between the two has a certain degree of freedom. The lift adjustment mechanism includes a connecting bracket 5 fixed to the trailer 7. The connecting bracket 5 is welded to the trailer and is provided with a detachable adjusting member 4. Preferably, the adjusting member is connected to the connecting bracket 5 via a bolt. The bolt engages with threaded holes at different heights to adjust the height of the adjusting member. The adjusting member 4 is hingedly connected to the towing telescopic member 3. During descent, by changing the mounting height of the towing telescopic member 3 and the adjusting member 4, the stress on the tractor structure is improved, thereby enhancing descent safety.

[0027] like Figure 2 As shown in Example 2, a downhill stepping device for a tunnel boring machine trailer is provided. Based on Example 1, this embodiment is used as an implementation method. The adjusting member is a movable ear seat 41a. The connecting bracket 5 is provided with multiple adjustment holes arranged in a vertical row. The movable ear seat 41a can be connected to the adjustment holes at different heights via bolts, thereby adjusting the height of the towing cylinder and the movable ear seat mounting point to achieve the purpose of force balance. The movable ear seat 41a is provided with a mounting hole 42a; the towing telescopic member 3 can be connected to the mounting hole 42a via a pin or bolt. The movable ear seat is bolted to the connecting bracket 5. During the uphill lifting of the trailer, its mounting position on the connecting bracket is changed, reducing the stress angle of the structural member, protecting the cylinder and bracket, and enabling the trailer to be lifted uphill. During the downhill process, by changing the mounting point height of the towing telescopic member 3 and the mounting hole 42a, the trailer can be placed on the ground to follow the main machine stepping, while also being able to be lifted back to the height of the tunnel axis.

[0028] During normal tunneling, there is inevitably a certain height difference between the trailer track and the ground. In this embodiment, the connecting bracket compensates for this height difference between the trailer and the ground, saving time in overhead laying and enabling efficient advancement of the tunnel boring machine. However, at the final start of tunneling, the trailer still needs to be raised to the designed height (the tunnel axis). The specific process is as follows:

[0029] ①When the tunnel boring machine starts to move forward, Figure 1 The components are installed in the positions shown, and the trailer follows the main machine stepping on the initial slope track 81 of the slope-changing track 8.

[0030] ② The roadheader moves to a certain distance from the starting tunnel entrance, and the trailer moves from the initial slope track 81 to the lifting ramp 82. The trailer track begins to rise and the wheelset 6 moves forward along the track. As the trailer is lifted, the swing angle of the towing cylinder relative to the ground gradually increases. Figure 3 .

[0031] ③ As the excavation moves forward and the trailer is gradually lifted, the swing angle of the towing cylinder gradually increases. When the swing angle of the towing cylinder is greater than a certain angle, the towing cylinder stops moving, and the main engine and trailer are parked; remove the mounting bolts of the mobile ear seat, move the mobile ear seat down a position, and then tighten the mounting bolts of the mobile ear seat, lower the height of the towing cylinder and the mounting position of the mobile ear seat, so that the axis of the towing cylinder is close to or coincides with the axis of the tunnel, and balance the force. Figure 4 .

[0032] ④ The tunnel boring machine continues to step away from the stepping frame and enters the starting tunnel. The trailer is lifted along the track to the designed height. Then the movable ear seat can be moved to the original designed position for installation and reinforcement. The stepping is completed. Figure 5 .

[0033] like Figure 6 、 7 As shown, Example 3 is a downhill stepping device for a roadheader trailer. This embodiment further optimizes Example 1 and differs from Example 2 in that the adjusting member in this embodiment is a disc seat 41b. A rotating shaft 42b is provided at the center of disc seat 41b. Rotating shaft 42b is rotatably mounted on the front end of connecting bracket 5 via a bearing seat or other means. Disc seat 41b is provided with an eccentrically arranged connecting hole 43b. The pulling and retracting member 3 is connected to the connecting hole 43b via a pin or bolt. By rotating the rotating shaft and coordinating the extension and retraction of the pulling cylinder, the height of the connecting hole can be changed, thereby adjusting the height of the pulling cylinder and the disc seat mounting point.

[0034] To further control and lock the shaft's rotational direction, one end of the shaft 42b is fixedly connected to the disc base 41b, and the other end is equipped with a rotating handle 44b. Specifically, a rotating disc and a handle are fixed to each end of the shaft, making it easier to rotate the shaft using the handle. A positioning plate 45b is provided on the side of the connecting bracket 5 corresponding to the rotating handle 44b. This positioning plate 45b is equipped with several fixing screw holes, and the rotating handle 44b is equipped with fixing bolts 46b that mate with these fixing screw holes. When the shaft is rotated to the desired position, the fixing bolts 46b engage the corresponding fixing screw holes, locking the handle and shaft, further improving force stability.

[0035] The specific process is as follows:

[0036] ① When the roadheader starts to step forward, the disc seat is in the normal position, and the trailer follows the main machine stepping on the initial starting track 81 of the slope-changing track 8.

[0037] ② The roadheader moves to a certain distance from the starting tunnel entrance, and the trailer moves from the initial slope track 81 to the lifting ramp 82. The trailer track begins to rise and the wheelset 6 moves forward along the track. As the trailer is lifted, the swing angle of the towing cylinder relative to the ground gradually increases.

[0038] ③ As the excavation moves forward and the trailer is gradually lifted, the swing angle of the towing cylinder gradually increases. When the swing angle of the towing cylinder is greater than a certain angle, the stepping is stopped, and the main engine and trailer are parked; the rotating shaft is rotated to rotate the installation position of the disc seat and the towing cylinder (that is, the position of the connecting hole) downward, that is, the height of the installation position of the towing cylinder and the disc seat is lowered, so that the axis of the towing cylinder is close to or coincides with the axis of the tunnel, balancing the force.

[0039] ④ The tunnel boring machine continues to step forward, detaches from the stepping frame and enters the starting tunnel. The trailer is lifted along the track to the designed height. Then the shaft can be rotated in the opposite direction to rotate the disc seat to the original designed position and lock it, and the stepping is completed.

[0040] like Figure 8 As shown, Example 4 is a downhill stepping device for a roadheader trailer. This example further optimizes Example 1 and differs from Examples 2 and 3 in that the adjusting member in this example is a connecting seat 41c, which is fixed to the front end of the connecting bracket 5 by bolts. The connecting seat 41c is provided with an arc groove 42c. The pulling and retracting member 3 is connected to the arc groove 42c by a pin or bolt connection, preferably a bolt connection. The retracting action of the pulling and retracting member enables the pin or bolt to move within the arc groove 42c, thereby adjusting the height of the connection point, that is, adjusting the height of the pulling cylinder and the connecting seat mounting point.

[0041] The specific process is as follows:

[0042] ① When the roadheader starts to step forward, the towing cylinder is located in the normal position in the arc groove, and the trailer follows the main machine stepping on the initial starting track 81 of the slope changing track 8.

[0043] ② The roadheader moves to a certain distance from the starting tunnel entrance, and the trailer moves from the initial slope track 81 to the lifting ramp 82. The trailer track begins to rise and the wheelset 6 moves forward along the track. As the trailer is lifted, the swing angle of the towing cylinder relative to the ground gradually increases.

[0044] ③ As the excavation moves forward and the trailer is gradually lifted, the swing angle of the towing cylinder gradually increases. When the swing angle of the towing cylinder is greater than a certain angle, it stops moving and the main machine and trailer stop; the position of the pin or bolt in the arc groove is moved downward, that is, the installation position of the connecting seat and the towing cylinder (that is, the position of the pin or bolt) is rotated downward, that is, the height of the installation position of the towing cylinder and the connecting seat is lowered, so that the axis of the towing cylinder is close to or coincides with the axis of the tunnel, balancing the force.

[0045] ④ The tunnel boring machine continues to step forward, detaches from the stepping frame and enters the starting tunnel. The trailer is lifted along the track to the designed height. Then the shaft can be rotated in the opposite direction to rotate the disc seat to the original designed position and lock it, and the stepping is completed.

[0046] In this utility model, the trailer downhill stepping method uses a trailer connecting bracket to connect to the main machine, and then the trailer is placed on the ground and steps with the main machine to the starting tunnel. Then, the side slope track is used to lift the trailer to the designed height, allowing the entire machine to proceed normally. Therefore, according to this utility model, the trailer steps on the ground, and the track laying no longer needs to be supported by a raised frame or reinforced. This solves the problem of low efficiency of long-distance downhill stepping of large-scale tunnel boring machines.

[0047] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A downhill stepping device for a roadheader trailer, characterized by: The invention comprises a towing telescopic member (3) arranged between a tunnel boring machine main body (1) and a trailer (7), wherein one end of the towing telescopic member (3) is hinged to the tunnel boring machine main body (1), and the other end is connected to the trailer (7) via a lifting adjustment mechanism; the towing telescopic member (3) cooperates with the lifting adjustment mechanism to adjust the angle of the trailer (7) relative to the tunnel axis.

2. The downhill stepping device for a roadheader trailer according to claim 1, characterized in that: A first ear seat (2) is provided at the rear of the tunnel boring machine main body (1), and a pulling telescopic member (3) is hinged to the first ear seat (2).

3. The downhill stepping device for a roadheader trailer according to claim 1 or 2, characterized in that: The lifting adjustment mechanism comprises a connecting bracket (5) fixed on the trailer (7), a detachable adjusting member (4) is provided on the connecting bracket (5), and the adjusting member (4) is hinged to the towing telescopic member (3).

4. The downhill stepping device for a roadheader trailer according to claim 3, characterized in that: The adjusting member is a movable ear seat (41a), and a plurality of adjusting holes arranged in an upper and lower row are provided on the connecting bracket (5). The movable ear seat (41a) can be connected with the adjusting holes of different heights through a bolt member, and a mounting hole (42a) is provided on the movable ear seat (41a); the pulling and telescopic member (3) can be connected with the mounting hole (42a) through a pin shaft or a bolt.

5. The downhill stepping device for a roadheader trailer according to claim 3, characterized in that: The adjusting member is a disc seat (41b), a rotating shaft (42b) is provided at the center of the disc seat (41b), the rotating shaft (42b) is rotatably arranged on the front end surface of the connecting bracket (5), an eccentrically arranged connecting hole (43b) is provided on the disc seat (41b), and the pulling and retracting member (3) is connected to the connecting hole (43b) via a pin or a bolt.

6. The downhill stepping device for a roadheader trailer according to claim 5, characterized in that: One end of the rotating shaft (42b) is fixedly connected to the disc seat (41b), and the other end is provided with a rotating handle (44b). A positioning plate (45b) is provided on the side of the connecting bracket (5) corresponding to the rotating handle (44b). The positioning plate (45b) is provided with a plurality of fixing screw holes, and the rotating handle (44b) is provided with fixing bolts (46b) that match the fixing screw holes.

7. The downhill stepping device for a roadheader trailer according to claim 3, characterized in that: The adjusting member is a connecting seat (41c), which is fixed to the front end of the connecting bracket (5) by means of bolts. A circular arc groove (42c) is provided on the connecting seat (41c), and the pulling and retracting member (3) is connected to the circular arc groove (42c) by means of a pin or a bolt.

8. The downhill stepping device for a roadheader trailer according to any one of claims 4 to 7, characterized in that: The pulling telescopic member (3) is a pulling oil cylinder or a pulling air cylinder.

9. The downhill stepping device for a roadheader trailer according to claim 1, characterized in that: The lower part of the trailer (7) is provided with a wheelset (6), and the wheelset (6) cooperates with a slope-changing track (8) laid in the tunnel.

10. The downhill stepping device for a roadheader trailer according to claim 9, characterized in that: The slope-changing track (8) comprises an initial slope track (81) and a lifting ramp (82), and the initial slope track (81) and the lifting ramp (82) are smoothly transitionally connected.

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