A new type of shield starting and receiving bracket

Abstract

The present invention discloses a new type of shield starting and receiving bracket, which belongs to the technical field of shield construction. The bracket comprises a base frame and a balance frame. A plurality of pairs of oil pressure regulating mechanisms are arranged between the base frame and the balance frame, and each pair of oil pressure regulating mechanisms comprises a first oil tank and a combined oil tank. The first oil tank and the combined oil tank are connected by a pipeline. The output ends of the first oil tank and the combined oil tank are respectively provided with a first piston rod and a special-shaped piston rod, and the upper ends of the first piston rod and the special-shaped piston rod are hinged to the lower side of the balance frame. Through the present invention, when the bracket in the working shaft receives the shield machine, there is no need to adjust the bracket position. The bracket can be regulated by its own oil pressure to weaken the influence of sinking and deflection, so that the central axis of the shield machine, the central axis of the tunnel and the sealing center of the opening are basically on the same axis, and there is no need to adjust the bracket position by a crane for a second lifting. While improving work efficiency, the safety of the shield machine starting and receiving is effectively improved.

Description

Technical Field

[0001] The invention mainly relates to the technical field of shield construction, in particular to a new type of shield starting and receiving bracket. Background Art

[0002] The full name of the shield machine is shield tunnel boring machine or full-section tunnel boring machine. It is a tunnel boring machine that uses the shield method. The shield construction method is that the tunnel boring machine lays the supporting segments of the tunnel while excavating. Shield machines can be divided into open type, mechanical cutting type, grid type and extrusion type. This machine has the feature of completing the tunnel in one excavation. From excavation, advancement, to support, all are completed by this machine.

[0003] The main function of the bracket during the initial launch of the shield machine is to provide support for the machine as it begins tunneling from the station. The bracket ensures optimal alignment of the shield machine's central axis, the tunnel's initial section's central axis, and the portal's center, with a typical deviation of ±10mm. Before construction, the bracket is installed horizontally within the station's working shaft, with the axis and elevation adjusted. The disassembled shield machine components are then placed on the bracket using a crane, and assembled for launch. After the shield enters the soil through the portal, it is prone to sinking and "bowing" due to the heavy head and insufficient soil bearing capacity. Furthermore, if the bracket height is not adjusted to the appropriate accuracy upon arrival at the receiving station, the shield machine head can also "bowing" upon entering the station. This "bowing" phenomenon can easily damage the portal seal, leading to safety risks such as water and soil inrush. When the shield machine arrives for reception, the height and axis of the bracket are difficult to determine, and adjustment is difficult, time-consuming and labor-intensive. Generally, the bracket height is lowered to 20 to 30 mm below the estimated value, but it is easy to "kowtow" during reception, which damages the tunnel portal seal. If the central axis of the bracket deviates too much from the axis of the shield machine, it must take a lot of effort and time to adjust to prevent safety accidents caused by lateral rolling of the shield machine body. However, delayed reception of the shield machine will increase the risk of tunnel portal leakage. Summary of the Invention

[0004] The technical solution of the present invention addresses the technical problem that the existing technical solutions are too simple, and provides a solution that is significantly different from the existing technology. Specifically, the present invention mainly provides a new type of shield starting and receiving bracket to solve the technical problem raised in the above background technology that in order to cope with the sinking situation after the shield machine is placed, the side of the bracket that receives the cutter disc will be raised, but the amount of the raise cannot be determined, and the raise can only be made based on experience, so it is impossible to ensure that the deviation between the center of the shield machine and the center line of the tunnel is within the range of ±10mm.

[0005] The technical solution adopted by the present invention to solve the above technical problems is:

[0006] A new type of shield starting and receiving bracket includes a base frame and a balance frame. Two support frames are provided in the middle position of the upper side of the base frame, and a reinforcement shaft is provided between the two support frames. The reinforcement shaft is rotatably connected to the middle position of the lower side of the balance frame. Multiple pairs of oil pressure control mechanisms are provided between the base frame and the balance frame. The multiple pairs of oil pressure control mechanisms are symmetrically arranged on both sides of the base frame, and each pair of the oil pressure control mechanisms includes a first oil tank and a combined oil tank, and the first oil tank and the combined oil tank are connected by a pipeline. The output ends of the first oil tank and the combined oil tank are respectively provided with a first piston rod and a special-shaped piston rod, and the upper ends of the first piston rod and the special-shaped piston rod are hinged to the lower side of the balance frame.

[0007] Preferably, the combined oil tank includes a first oil chamber, a second oil chamber and a third oil chamber, the bottom area of the second oil chamber is half of the bottom area of the first oil chamber, and the two interface positions of the first oil chamber are respectively provided with a first pipe and a third pipe, one end of the first pipe is connected to the first oil tank, and one end of the third pipe is connected to the third oil chamber, and a second pipe is provided at the interface position of the second oil chamber, and one end of the second pipe is connected to the interface on the first oil chamber.

[0008] Preferably, the special-shaped piston rod includes a bent piston portion and a transmission portion, and both ends of the bent piston portion are movably connected to the inner walls of the first oil chamber and the second oil chamber respectively.

[0009] Preferably, the first pipe, the second pipe and the third pipe on the same combined oil tank are commonly provided with an on-off adjustment component, and the on-off adjustment component includes an on-off adjustment disk and two connecting disks, and each of the connecting disks is evenly spaced around and surrounded by a first interface, a second interface and a third interface, and the first interface is connected to the first pipe, the second interface is connected to the second pipe, and the third interface is connected to the third pipe.

[0010] Preferably, shaft seals are provided at positions where both sides of the on-off adjustment disk are rotatably connected to the connecting disk.

[0011] Preferably, each of the first piston rods is sleeved with a return spring, and the upper end of the return spring is connected to the upper side of the inner wall of the first oil tank.

[0012] Preferably, the chassis includes a bottom supporting front end and a bottom supporting rear end, and the bottom supporting front end is connected to the lower side of the outer wall of the first oil tank, and the first oil tank is linearly distributed with equal intervals, and the bottom supporting rear end is connected to the lower side of the outer wall of the combined oil tank, and the combined oil tank is linearly distributed with equal intervals, and the side edges of the chassis are all provided with I-shaped positioning steels.

[0013] Preferably, the balance frame includes an upper portion supporting the front end and an upper portion supporting the rear end.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] (1) The present invention realizes that the bracket in the working shaft does not need to be raised before the shield machine is placed by setting the base frame, support frame, reinforcement shaft and balance frame. The bracket can regulate its own oil pressure by relying on the mutual cooperation between the first oil tank, the first piston rod, the return spring, the combined oil tank, the first oil chamber, the second oil chamber, the third oil chamber, the special-shaped piston rod, the first pipeline, the second pipeline and the third pipeline, thereby increasing the oil pressure in the first oil tank, pushing up the front end of the upper support, and preventing one side of the front end of the upper support from deviating downward, thereby eliminating the need to raise the side of the bracket used to support the cutter head of the shield machine. High, weakening the impact of sinking and deflection, so that the shield center, tunnel center and portal sealing center are basically on the same central axis, ensuring the unity of the three centers, meeting the accuracy and slope requirements of the shield machine's initial excavation position in the portal, avoiding the "knocking" phenomenon of the shield machine's head sinking after it starts entering the soil, so as to improve the safety of the shield machine's initial excavation, without the need for a secondary lifting and adjustment of the crane, and can improve the centering accuracy, shorten the shield machine's entry and exit and tunnel time, and effectively improve the safety of the shield machine's starting and receiving while improving work efficiency, avoiding the safety hazards caused by lifting again.

[0016] (2) The present invention realizes that the oil in the first oil tank is pressed into the second oil chamber by the reset spring when receiving, and because the bottom area of the second oil chamber is half of the ground surface of the first oil chamber and the oil volume is the same, after the oil enters the second oil chamber, the distance that the special-shaped piston rod is lifted is twice the moving distance of the first piston rod, thereby ensuring that the height of the upper receiving rear end movement will be greater than the upper receiving front end, the upper receiving front end moves downward, and the upper edge of the upper receiving rear end can provide the shield machine with a receiving surface lower than the lowest edge of the tunnel exit, as well as a suitable position and slope, which can effectively support the shield machine head, avoid "knocking" and make the shield machine running line parallel to the central axis of the bracket, and the slope is basically consistent within the specified range, so as to avoid the risk of large displacement of the shield tail and the formed tunnel, which is very safe and reliable.

[0017] (3) The present invention realizes simultaneous control of the on / off of each pair of the first pipeline, the second pipeline and the third pipeline by setting the on / off adjustment disk, the connecting disk, the first interface, the second interface, the third interface and the shaft seal. The four modes corresponding to the first pipeline are "on, off, off, off", the four modes corresponding to the second pipeline are "off, off, on, off", and the four modes corresponding to the third pipeline are "off, off, on, off". There is no need to control the on / off of each pipeline one by one, thereby ensuring the stability of the oil pressure, which is very convenient and quick.

[0018] The present invention will be explained in detail below with reference to the accompanying drawings and specific embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0020] Figure 2 It is a schematic diagram of the overall decomposition structure of the present invention;

[0021] Figure 3 Schematic diagram of the oil pressure control mechanism of the present invention;

[0022] Figure 4 It is a schematic cross-sectional view of the combined fuel tank of the present invention;

[0023] Figure 5 It is a cross-sectional schematic diagram of the on-off adjustment component of the present invention;

[0024] Figure 6 A schematic diagram of the movement trend of the gimbal after the shield machine is placed according to the present invention;

[0025] Figure 7 The figure is a simplified diagram of the movement trend of the balance frame under the action of the return spring of the present invention.

[0026] Description of the drawings: 1. Underframe; 11. Bottom supports the front end; 12. Bottom supports the rear end; 13. Support frame; 14. Reinforced rotating shaft; 2. Balancing frame; 21. Upper part supports the front end; 22. Upper part supports the rear end; 3. Oil pressure control mechanism; 31. First oil tank; 32. First piston rod; 321. Return spring; 33. Combined oil tank; 331. First oil chamber; 332. Second oil chamber; 333. Third oil chamber; 34. Special-shaped piston rod; 341. Bending piston part; 342. Transmission part; 35. First pipeline; 36. Second pipeline; 37. Third pipeline; 38. On-off adjustment assembly; 381. On-off adjustment disk; 382. Connecting disk; 383. First interface; 384. Second interface; 385. Third interface; 386. Shaft seal; 4. I-shaped positioning steel. Implementation Method

[0027] To facilitate understanding of the present invention, the present invention will be described more comprehensively below with reference to the relevant drawings. Several embodiments of the present invention are given in the drawings. However, the present invention can be implemented in different forms and is not limited to the embodiments described in the text. On the contrary, these embodiments are provided to make the content disclosed in the present invention more thorough and comprehensive.

[0028] It should be noted that when an element is referred to as being "fixed on" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used in this article are for illustrative purposes only.

[0029] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly associated with those skilled in the art to which the present invention pertains. The terminology used herein in the specification of the present invention is for the purpose of describing specific embodiments and is not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0030] Example 1, please refer to the attached Figure 1-7 As shown, a new type of shield starting and receiving bracket includes a base frame 1 and a balance frame 2. Two support frames 13 are provided in the middle position of the upper side of the base frame 1, and a reinforcement shaft 14 is provided between the two support frames 13. The reinforcement shaft 14 is rotatably connected to the middle position of the lower side of the balance frame 2. Multiple pairs of oil pressure control mechanisms 3 are provided between the base frame 1 and the balance frame 2. The multiple pairs of oil pressure control mechanisms 3 are symmetrically arranged on both sides of the base frame 1, and each pair of the oil pressure control mechanisms 3 includes a first oil tank 31 and a combined oil tank 33, and the first oil tank 31 and the combined oil tank 33 are connected by a pipeline. The output ends of the first oil tank 31 and the combined oil tank 33 are respectively provided with a first piston rod 32 and a special-shaped piston rod 34, and the upper ends of the first piston rod 32 and the special-shaped piston rod 34 are hinged to the lower side of the balance frame 2.

[0031] The above structure realizes that the bracket in the working shaft does not need to be raised before the shield machine is placed. The bracket can be regulated by its own oil pressure, and the side of the bracket used to receive the shield machine cutter head is raised to reduce the influence of sinking and deflection, so that the shield center, tunnel center and portal sealing center are on the same central axis, ensuring the unity of the three centers, avoiding the situation of "knocking" when entering the earth tunnel, and eliminating the need for a second lifting and adjustment by the crane, thereby improving work efficiency and avoiding the safety hazards caused by the second lifting. In addition, when receiving, it can also provide the shield machine with a receiving surface lower than the lowest edge of the tunnel exit, which is very safe and reliable.

[0032] The specific operation is as follows: first, the bracket is placed as a whole in the working shaft at the entrance of the tunnel in a horizontal state, the on-off adjustment component 38 is in the initial state, and the corresponding first pipe 35, second pipe 36 and third pipe 37 are respectively in the open, closed and closed positions. Then, the shield machine is lifted by a crane and placed on the balance frame 2, so that the position of the shield machine cutterhead is located at the upper receiving front end 21 of the balance frame 2, and the tail of the shield machine is located at the upper receiving rear end 22. Since the cutterhead side is heavier, the base frame 1 and the balance frame 2 in the bracket are regarded as a whole. The bottom receiving front end 11 side of the base frame 1 will sink, accompanied by slight deflection and bending. The return spring 321 is compressed, and at the same time, the upper receiving front end 21 of the balance frame 2 moves downward, and the upper receiving rear end 22 moves upward. The special-shaped piston rod 34 squeezes the oil in the first oil chamber 331, so that the oil enters the first oil tank 31 through the first pipe 35, propping up the first piston rod 32, preventing the upper receiving front end 21 from moving downward, reducing the impact of sinking and deflection. Then, the on-off adjustment disk 381 is twisted clockwise, so that the first pipe 35, the second pipe 36 and the third pipe 37 are respectively in the off, off and off positions, ensuring the oil pressure in the first oil tank 31, so that the shield machine does not shake when entering the tunnel.

[0033] Move the bracket as a whole into the working shaft at the tunnel exit, and then twist the on-off adjusting disk 381 clockwise again, so that the first pipe 35, the second pipe 36 and the third pipe 37 are in the closed, open and open positions respectively. Under the action of the return spring 321 and the gravity of the balance frame 2 itself, the first piston rod 32 pressurizes the oil in the first oil tank 31 into the second oil chamber 332. Then the special-shaped piston rod 34 moves upward, pushing the upper receiving rear end 22 to move upward, and at the same time the upper receiving front end 21 moves downward, providing a receiving surface lower than the lowest edge of the tunnel exit, which is convenient for receiving the cutter head of the shield machine. Since the first oil chamber 331 and the third oil chamber 333 are connected at this time, there will be no interference when the special-shaped piston rod 34 rises. Then twist the on-off adjusting disk 381 clockwise, so that the first pipe 35, the second pipe 36 and the third pipe 37 are in the closed, closed and closed positions respectively, ensuring that the oil pressure in the second oil chamber 332 is stable, and then the shield machine can be received.

[0034] Example 2, please refer to the attached Figure 3 and 4As shown, the combined oil tank 33 includes a first oil chamber 331, a second oil chamber 332, and a third oil chamber 333. The bottom area of the second oil chamber 332 is half that of the first oil chamber 331. A first pipe 35 and a third pipe 37 are respectively provided at two interface positions of the first oil chamber 331. One end of the first pipe 35 is connected to the first oil tank 31, and one end of the third pipe 37 is connected to the third oil chamber 333. A second pipe 36 is provided at the interface position of the second oil chamber 332, and one end of the second pipe 36 is connected to the interface on the first oil tank 31. The special-shaped piston rod 34 includes a bent piston portion 341 and a transmission portion 342. The two ends of the bent piston portion 341 are movably connected to the inner walls of the first oil chamber 331 and the second oil chamber 332, respectively. Through the mutual cooperation between the first oil tank 31, the first oil chamber 331, the second oil chamber 332, and the third oil chamber 333, temporary storage of oil is achieved. By converting the oil, appropriate oil pressure is provided to adjust the gimbal 2.

[0035] Example 3, please refer to the attached Figure 3 and 5As shown, the first pipe 35, the second pipe 36 and the third pipe 37 on the same combined oil tank 33 are commonly provided with an on-off adjustment component 38, and the on-off adjustment component 38 includes an on-off adjustment disk 381 and two connecting disks 382, and each connecting disk 382 is evenly spaced and surrounded by a first interface 383, a second interface 384 and a third interface 385, and the first interface 383 is connected to the first pipe 35, the second interface 384 is connected to the second pipe 36, and the third interface 385 is connected to the third pipe 37. Through the on-off adjustment component 38, the on-off control of the three pipes in each pair of oil pressure control mechanisms 3 is achieved at the same time, which is more convenient and quick. The positions where the on-off adjustment disk 381 and the connecting disk 382 are rotatably connected are both provided with shaft seals 386. The shaft seals 386 realize the sealing of the connection position between the on-off adjustment disk 381 and the connecting disk 382 to avoid leakage during the adjustment process. After the jack is fully opened, the jack 31 is opened and the jack 32 is in the closed position, and the jack 3 ...

[0036] The above description of the present invention is exemplified in conjunction with the accompanying drawings. It is obvious that the specific implementation of the present invention is not limited to the above-mentioned method. As long as such non-substantial improvements are made using the method concept and technical solution of the present invention, or the concept and technical solution of the present invention are directly applied to other occasions without improvement, they are all within the scope of protection of the present invention.

Claims

1. A novel shield starting and receiving bracket, comprising a base frame (1) and a balancing frame (2), wherein two support frames (13) are provided at the middle position of the upper side of the base frame (1), and a reinforcement shaft (14) is provided between the two support frames (13), and the reinforcement shaft (14) is rotatably connected to the middle position of the lower side of the balancing frame (2), characterized in that: A plurality of pairs of oil pressure regulating mechanisms (3) are provided between the base frame (1) and the balance frame (2), and the plurality of pairs of oil pressure regulating mechanisms (3) are symmetrically arranged on both sides of the base frame (1), and each pair of the oil pressure regulating mechanisms (3) includes a first oil tank (31) and a combined oil tank (33), and the first oil tank (31) and the combined oil tank (33) are connected via a pipeline, and the output ends of the first oil tank (31) and the combined oil tank (33) are respectively provided with a first piston rod (32) and a special-shaped piston rod (34), and the upper ends of the first piston rod (32) and the special-shaped piston rod (34) are hinged to the lower side of the balance frame (2); the base frame (1) includes a bottom receiving front end (11) and a bottom receiving rear end (12), and the bottom receiving front end (11) is connected to the lower side of the outer wall of the first oil tank (31), and the bottom receiving rear end (12) is connected to the lower side of the outer wall of the combined oil tank (33).

2. A shield starting and receiving new bracket according to claim 1, characterized in that: The combined oil tank (33) comprises a first oil chamber (331), a second oil chamber (332), and a third oil chamber (333). The bottom area of the second oil chamber (332) is half the bottom area of the first oil chamber (331). A first pipe (35) and a third pipe (37) are respectively provided at two interface positions of the first oil chamber (331). One end of the first pipe (35) is connected to the first oil tank (31), and one end of the third pipe (37) is connected to the third oil chamber (333). A second pipe (36) is provided at the interface position of the second oil chamber (332), and one end of the second pipe (36) is connected to the interface on the first oil tank (31).

3. A shield starting and receiving new bracket according to claim 1, characterized in that: The special-shaped piston rod (34) comprises a bent piston portion (341) and a transmission portion (342), and both ends of the bent piston portion (341) are movably connected to the inner walls of the first oil chamber (331) and the second oil chamber (332), respectively.

4. A shield starting and receiving new bracket according to claim 1, characterized in that: The first pipe (35), the second pipe (36) and the third pipe (37) on the same combined oil tank (33) are commonly provided with an on-off adjustment assembly (38), the on-off adjustment assembly (38) comprising an on-off adjustment disk (381) and two connecting disks (382), each of the connecting disks (382) being uniformly spaced and surrounded by a first interface (383), a second interface (384) and a third interface (385), the first interface (383) being connected to the first pipe (35), the second interface (384) being connected to the second pipe (36), and the third interface (385) being connected to the third pipe (37).

5. A shield starting and receiving new bracket according to claim 4, characterized in that: Shaft seals (386) are provided at positions on both sides of the on-off regulating disk (381) where the connecting disk (382) is rotatably connected.

6. A shield starting and receiving new bracket according to claim 1, characterized in that: Each of the first piston rods (32) is sleeved with a return spring (321), and the upper end of the return spring (321) is connected to the upper side of the inner wall of the first oil tank (31).

7. A shield starting and receiving new bracket according to claim 1, characterized in that: The first oil tanks (31) are linearly distributed at equal intervals, and the combined oil tanks (33) are linearly distributed at equal intervals. I-shaped positioning steels (4) are provided at the side edges of the chassis (1).

8. A shield starting and receiving new bracket according to claim 1, characterized in that: The balancing frame (2) comprises an upper supporting front end (21) and an upper supporting rear end (22).

Images