Arch type shield tunneling machine

Abstract

The utility model discloses an arch type shield tunneling machine which comprises a main cutting cutterhead and a crank cutterhead, the main cutting cutterhead is connected with the output end of a main driving system and rotates through the main driving system, and the main cutting cutterhead and the main driving system are both connected with a shield assembly through a connecting support. A cavity is formed between the shield assembly and the main driving system; an opening is formed in the position, corresponding to the cavity, of the shield assembly, the crank cutterhead is located in the cavity, the disc face of the crank cutterhead is located outside the shield assembly through the opening part, the crank cutterhead is connected with the output end of the driving system, and the driving system drives the crank cutterhead to rotate through the opening and to be matched with the main cutting cutterhead to form an arch cutting face. The arch cutting face can increase the overall height, the arch cutting face is used as a traffic tunnel, the passable height is increased to adapt to higher vehicles, and the passing adaptability is improved.

Description

Technical Field

[0001] This application relates to the technical field of tunnel construction equipment, and specifically to an arch-shaped shield machine. Background Technique

[0002] Shield tunnel construction has become one of the important underground construction methods today. The common cutterhead forms of shield machines are circular, rectangular, and horseshoe-shaped. For the tunnels excavated by the cutterheads of circular and horseshoe-shaped shield machines, a large amount of concrete needs to be laid at the bottom of the tunnel to make the tunnel surface horizontal before laying other facilities such as tracks. This requires a large amount of materials and the natural setting of the piled concrete takes a long time, resulting in low construction efficiency; while the height of the tunnel excavated by the rectangular shield machine is relatively low, and the available height after the tunnel is laid is low. Using it as a tunnel will reduce the traffic height and the adaptability of vehicle passage. Content of the Utility Model

[0003] The purpose of the present utility model is to provide an arch-shaped shield machine to solve the problems raised in the above background technique.

[0004] To achieve the above purpose, the present utility model provides the following technical solutions:

[0005] An arch-shaped shield machine, including a main cutting cutterhead and a crank cutterhead. The main cutting cutterhead is connected to the output end of the main drive system and rotates through the main drive system. Both the main cutting cutterhead and the main drive system are connected to the shield assembly through a connecting bracket, and a cavity is formed between the shield assembly and the main drive system;

[0006] Among them, an opening is provided at the position corresponding to the cavity on the shield assembly. The crank cutterhead is located in the cavity and part of the cutterhead surface of the crank cutterhead is located outside the shield assembly through the opening. The crank cutterhead is connected to the output end of the drive system, and the drive system drives the crank cutterhead to rotate through the opening and cooperate with the main cutting cutterhead to form an arch cutting surface;

[0007] Among them, a plurality of crank cutterheads are provided, and the plurality of crank cutterheads are symmetrically arranged on both sides of the main cutting cutterhead respectively to form an arch cutting surface.

[0008] As a further solution of the present utility model: A crank output shaft is provided on the crank cutterhead, and the crank output shaft connects the crank cutterhead and the output end of the drive system;

[0009] The crank output shaft is connected to the edge position on the non-cutting surface side of the crank cutterhead, so that when the drive system outputs, the crank cutterhead outputs around the crank output shaft.

[0010] As a further solution of the present utility model: The connecting bracket includes a first bracket and a second bracket. A telescopic device is arranged between the first bracket and the second bracket. One end of the second bracket away from the first bracket is installed with the shield assembly, and the drive system is on the second bracket;

[0011] The telescopic direction of the telescopic device is perpendicular to the direction of the output shaft of the main drive system, so that the drive system moves in a direction perpendicular to the output shaft of the main drive system through the telescopic device, thereby driving the crank cutter head to move and expanding or shrinking the arch cutting surface.

[0012] As a further solution of the present utility model: A speed reducer is arranged between the crank output shaft and the drive system.

[0013] As a further solution of the present utility model: There are two crank cutter heads, and the two crank cutter heads are symmetrically arranged on both sides of the main cutting cutter head.

[0014] As a further solution of the present utility model: It further includes a slag discharge auger. One end of the slag discharge auger is located in the cavity, and the other end of the slag discharge auger is located outside the shield assembly, so that the residue in the cavity is discharged through the slag discharge auger.

[0015] Compared with the prior art, the beneficial effects of the present utility model are:

[0016] By setting the shield assembly into an arch structure and arranging the main cutting cutter head and the crank cutter head, the present utility model can directly form the tunnel into an arch shape during the tunneling process of the shield machine. When laying facilities such as tracks, only a small amount of concrete filling is required to level the tunnel floor, reducing material loss and at the same time the concrete solidifies more quickly, improving the construction efficiency. Since the upper part of the tunnel is an arch structure, the overall height is increased. When used as a traffic tunnel, the passing height is increased to adapt to higher vehicle passing, improving the passing adaptability. Since the shield assembly is internally provided with a deviation correction oil cylinder as required, when the tunneling direction is inclined, the shield attitude can be adjusted in a timely and rapid manner. Description of the Drawings

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the following drawings are only some embodiments of the present application. For those skilled in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0018] Figure 1 It is a schematic diagram of the main structure of an arch-shaped shield machine provided by an embodiment of the present application;

[0019] Figure 2 Schematic diagram of the main structure of an arch-shaped shield machine without a slag discharging auger provided by an embodiment of the present application;

[0020] Figure 3 For Figure 2 The enlarged structure diagram at position A in

[0021] Figure 4 Schematic diagram of the structure of a crank cutter head provided by an embodiment of the present application;

[0022] Figure 5 Schematic diagram of the overall structure of an arch cutting surface provided by an embodiment of the present application;

[0023] Figure 6 Schematic diagram of the structure of the main drive system provided by an embodiment of the present application.

[0024] The numbers in the figure represent:

[0025] 100, main cutting cutter head; 110, main drive system; 111, main motor; 112, large gear ring; 120, stirring rib; 200, crank cutter head; 210, drive system; 220, crank output shaft; 230, reducer; 240, fixed groove; 300, connecting bracket; 310, first bracket; 320, second bracket; 330, telescopic device; 400, shield assembly; 410, opening; 500, cavity; 510, inner machine compartment; 600, arch cutting surface; 700, slag discharging auger. Specific embodiments

[0026] Next, the technical solutions in the embodiments of the present application will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments of the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present application. It can be understood that the accompanying drawings are only for reference and illustration, and are not used to limit the present application. The connection relationships shown in the drawings are only for clear description and do not limit the connection methods.

[0027] Please refer to Figures 1 to 5, in the embodiment of the present utility model, an arch-shaped shield machine includes a main cutting cutter head 100, a crank cutter head 200, a main drive system 110, stirring ribs 120, a shield assembly 400, a cavity 500, an inner machine chamber 510, and a slag discharging auger 700. Among them, the shield assembly 400 is arch-shaped and located outside the entire small-diameter shield machine. The main cutting cutter head 100 is located at the front end of the shield assembly 400, and the center position is fixedly connected to the output end of the main drive system 110 fixed inside the shield assembly 400. The main drive system 110 is fixedly connected to the inner wall of the shield assembly 400 through a connecting bracket 300. The stirring ribs 120 are evenly distributed and fixed on the non-cutting surface of the main cutting cutter head 100. The cavity 500 formed between the stirring ribs 120 and the connecting bracket 300 of the main drive system 110 is the earth pressure chamber. The slag discharging auger 700 is obliquely fixed inside the shield assembly 400, the feeding port is located at the lower part of the earth pressure chamber, and the discharging port is located at the upper part of the rear end of the shield assembly 400. The inner machine chamber 510 is the cavity 500 formed at the middle position inside the shield assembly 400.

[0028] There are two crank cutter heads 200, which are respectively located on both sides of the lower part of the main cutting cutter head 100 and are symmetrically arranged and limited and fixed. The arch-shaped shield assembly 400, the main cutting cutter head 100, and the crank cutter heads 200 cooperate to make the excavated tunnel form an arch shape, which is convenient for the leveling and concrete filling work during the subsequent laying of ground tracks or roadbeds. At the same time, since the upper part of the tunnel is arch-shaped, the tunnel height can be effectively increased. As a tunnel, it can adapt to higher vehicle traffic and improve the traffic adaptability of the tunnel.

[0029] The crank cutter head 200 is connected with a crank output shaft 220, a speed reducer 230, and a drive system 210. Among them, the cutting surface of the arc-shaped crank cutter head 200 is fixed with a center cutter, a shell cutter, and a scraping cutter for cutting the soil layer.

[0030] One end of the crank output shaft 220 is connected to the non-cutting surface of the arc-shaped crank cutter head 200, and the other end is connected to the output end of the speed reducer 230. The output end of the drive system 210 is connected to the input end of the speed reducer 230. The arrangement of the crank output shaft 220 and the arc-shaped crank cutter head 200 can drive the crank cutter head 200 to rotate along the center of the crank output shaft 220 by the drive system 210, and cut the soil layer that cannot be cut under the main cutting cutter head 100 to form the bottom plane of the arch tunnel.

[0031] Specifically, it is as follows:

[0032] The crank output shaft 220 is connected to the position of the edge on one side of the non-cutting surface of the crank cutter head 200, so that when the drive system 210 outputs, the crank cutter head 200 outputs around the crank output shaft 220.

[0033] In an embodiment of the present application, the connecting bracket 300 further includes a first bracket 310 and a second bracket 320. Among them, the main cutting cutter head 100 is installed on the first bracket 310, the crank cutter head 200 and the drive system 210 are installed on the second bracket 320. A shield assembly 400 is installed at one end of the second bracket 320 away from the first bracket 310. A telescopic device 330 is installed between the first bracket 310 and the second bracket 320, so that the second bracket 320 can be adjusted through the telescopic device 330. The telescopic device 330 is a linear telescopic device, and its output end is connected to the second bracket 320, which can move the second bracket 320 in a direction perpendicular to the output shaft of the main drive system 110, facilitating the movement of the crank cutter head 200, thereby expanding the arch cutting surface 600. The arch cutting surface 600 is formed by the shapes cut by the main cutting cutter head 100 and the crank cutter head 200, such as Figure 3 shown. At the same time, an opening 410 is provided on the shield assembly 400 corresponding to the position of the crank cutter head 200. The opening 410 communicates with its cavity 500, so that a part of the crank cutter head 200 is located outside the shield assembly 400 through the opening 410, facilitating the peeling of the soil layer in the tunnel.

[0034] Since in the embodiment of the present application, the crank cutter head 200 is an eccentric wheel structure, and the position where the crank output shaft 220 is connected to the crank cutter head 200 deviates from the center position of the crank cutter head 200. This structure can peel more cutting areas on the crank cutter head 200 from the soil layer. At the same time, to facilitate the control of the cutting area of the crank cutter head 200, thereby reducing the output torque of its drive system 210 and avoiding the overload of the drive system 210, such as Figure 4 shown, a plurality of fixing grooves 240 are provided on the crank cutter head 200. The fixing grooves 240 are strip-shaped structures and are arranged along the radial direction, facilitating the adjustment of the distance between the crank output shaft 220 and the circle of the crank cutter head 200 by connecting the crank output shaft 220 with the fixing grooves 240.

[0035] Among them, on the basis of the above structure, the arch cutting surface 600 on the arch-shaped shield machine can be adjusted in two levels through the mutual cooperation of the telescopic device 330 and the crank cutter head 200. The specific adjustment is as follows:

[0036] When the arch-shaped shield machine cuts the soil layer, the main cutting cutter head 100 cuts the main body of the soil layer to form a circular tunnel; when the crank cutter head 200 needs to cut, the telescopic device 330 is started to push out the drive system 210 and the crank cutter head 200, so as to form an arch cutting surface 600, facilitating the cutting of the crank cutter head 200. This is the first-level adjustment;

[0037] During the cutting process, if it is necessary to adjust the arch cutting surface 600 to expand or contract the cutting area of the arch cutting surface 600, the adjustment can be made on the crank cutter head 200. The position of the crank cutter head 200 is adjusted through the cooperation relationship between the fixed groove 240 and the crank output shaft 220. This is the secondary adjustment, and at the same time, this adjustment will more finely adjust the arch cutting surface 600.

[0038] As described above, a speed reducer 230 is also provided between the crank output shaft 220 and the drive system 210. The speed reducer 230 can reduce the rotational speed of the drive system 210 to control the speed of the crank cutter head 200.

[0039] At the same time, in the embodiment of the present application, the main drive system 110 includes a main motor 111 and a large gear ring 112. There are multiple main motors 111, and the output shafts of each motor are meshed with the large gear ring 112 through a speed reducer and a small gear. The large gear ring 112 is fixed to the main cutting cutter head 100. The main drive system 110 of the entire cutter head is composed of multiple main motors 111 in combination, and the driving force is greater and more stable.

[0040] The shield assembly 400 is composed of a front shield, a middle shield, and a rear shield welded together. The inside of the middle shield is a cavity 500, and the main motor 111 is located in the middle of the cavity 500. Different positions of the shield assembly 400 correspond to different positions of the internal structure of the shield machine, separating the internal structure to form areas with different functions, making the internal layout of the shield machine more reasonable.

[0041] The working principle of the present utility model is:

[0042] When the present utility model is in use, the main drive system 110 drives the main cutting cutter head 100 to rotate to cut the tunnel soil layer. At the same time, the crank cutter head 200 rotates along the crank output shaft 220 under the drive of the drive system 210, driving the cutter head surface to rotate to cut off the soil layer within the entire cutting range to form an arched excavation tunnel. Then, the cut soil and rock fall into the soil pressure bin. During the rotation of the main cutting cutter head 100, the stirring ribs 120 are driven to rotate to mix the soil and rock with the injected foam and bentonite into a soil body suitable for being discharged by the slag discharge auger 700, and then discharged to the rear of the shield machine main body through the slag discharge auger 700 to complete a cycle of tunnel excavation work. During the process of the main drive system 110 driving the main cutting cutter head 100 to rotate, multiple main motors 111 rotate and are combined through the large gear ring 112 at the motor output end to be transmitted to the main cutting cutter head 100, making the cutting force greater and facilitating construction. During the tunneling process, if the direction of the entire shield machine deviates, it can be adjusted through the deviation correction oil cylinder inside the shield assembly 400.

[0043] The above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present invention can be modified or equivalently replaced without departing from the spirit and scope of the technical solutions of the present invention.

Claims

1. An arch-shaped shield machine, characterized in that, It includes a main cutting cutter head and a crank cutter head. The main cutting cutter head is connected to the output end of the main drive system and rotates through the main drive system. Both the main cutting cutter head and the main drive system are connected to the shield assembly through a connecting bracket, and a cavity is formed between the shield assembly and the main drive system. Among them, an opening is provided at a position corresponding to the cavity on the shield assembly. The crank cutter head is located in the cavity, and a part of the surface of the crank cutter head is located outside the shield assembly through the opening. The crank cutter head is connected to the output end of the drive system, and the drive system drives the crank cutter head to rotate through the opening and cooperate with the main cutting cutter head to form an arch cutting surface. Among them, a plurality of crank cutter heads are provided, and the plurality of crank cutter heads are symmetrically arranged on both sides of the main cutting cutter head to form an arch cutting surface.

2. The arch - shaped shield machine according to claim 1, characterized in that, A crank output shaft is provided on the crank cutter head, and the crank output shaft connects the crank cutter head and the output end of the drive system. The crank output shaft is connected to the edge position on the non-cutting surface side of the crank cutter head, so that when the drive system outputs, the crank cutter head outputs around the crank output shaft.

3. The arch-shaped shield machine according to claim 2, characterized in that, The connecting bracket includes a first bracket and a second bracket. A telescopic device is arranged between the first bracket and the second bracket. The shield assembly is installed at one end of the second bracket away from the first bracket, and the drive system is on the second bracket. The telescopic direction of the telescopic device is perpendicular to the direction of the output shaft of the main drive system, so that the drive system moves in a direction perpendicular to the output shaft of the main drive system through the telescopic device, thereby driving the crank cutter head to move and expanding or shrinking the arch cutting surface.

4. An arch-shaped shield machine according to claim 2, characterized in that, A speed reducer is arranged between the crank output shaft and the drive system.

5. An arch-shaped shield machine according to claim 2, characterized in that, Two crank cutter heads are provided, and the two crank cutter heads are symmetrically arranged on both sides of the main cutting cutter head.

6. The arch - shaped shield machine according to claim 1, wherein, It also includes a slag discharging auger. One end of the slag discharging auger is located in the cavity, and the other end of the slag discharging auger is located outside the shield assembly, so that the residue in the cavity is discharged through the slag discharging auger.

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