TBM cutter head man-entering maintenance channel protection device

Abstract

The utility model provides a TBM cutter head man-entering maintenance channel protection device. The TBM cutter head man-entering maintenance channel protection device comprises a fixed door, a movable door and a first hydraulic oil tank. The movable door is slidably connected with the fixed door, the fixed door is arranged at the joint of the cutter head inner armor and the main drive and fixedly connected with the cutter head inner armor, and the first hydraulic oil tank is located at the starting end of the stroke of the movable door and fixedly connected with the fixed door. Slideways and a second hydraulic oil tank are arranged on the fixed door, the two slideways are symmetrically arranged at the two ends of an access channel inlet of the fixed door, and the movable door is slidably connected with the two slideways; the second hydraulic oil tank is arranged on the surface of the moving door; a telescopic rod is arranged between the first hydraulic oil tank and the second hydraulic oil tank and coincides with the symmetrical center line of the two sliding ways. The TBM cutter head man-entering maintenance channel protection device is arranged at the inner armor and the main driving part, a movable door is utilized, and a sealing system is additionally arranged, so that residues are prevented from entering the TBM cutter head man-entering maintenance channel during tunneling.

Description

Technical Field

[0001] The present application relates to the technical field of TBM maintenance, and in particular to a protective device for a TBM cutter head entering a maintenance channel. Background Art

[0002] As the core component in tunnel construction, the TBM (Tunnel Boring Machine) cutterhead undertakes the key task of crushing and cutting rocks. During tunnel excavation, various types of surrounding rocks will be encountered. When encountering hard rocks or rocks containing a lot of impurities, the wear rate of the cutterhead will accelerate sharply, affecting the service life of the cutterhead. Therefore, a maintenance channel is reserved in the TBM for the maintenance of the cutterhead.

[0003] When TBM is working, the crushing of surrounding rock and the transportation of gravel are carried out simultaneously. During this process, materials such as mortar and bentonite may also be transported. Once gravel or mortar enters the cutter head, there will be problems such as cutter head jamming and wear. Utility Model Content

[0004] The present application provides a TBM cutter head entry inspection channel protection device, which adds a sealing system to solve the problem that debris enters the TBM cutter head entry inspection channel during TBM excavation, thereby affecting the normal operation of the cutter head.

[0005] The present application provides a TBM cutter head access inspection channel protection device, comprising a cutter head inner armor and a main drive, and also comprising a fixed door, a movable door and a first hydraulic oil tank; the movable door is slidably connected to the fixed door, the fixed door is arranged at the connection between the cutter head inner armor and the main drive, the fixed door is fixedly connected to the cutter head inner armor, and the first hydraulic oil tank is close to the starting end of the travel of the movable door and is fixedly connected to the fixed door;

[0006] The fixed door is provided with a slideway and a second hydraulic oil tank, the two slideways are symmetrically arranged at both ends of the entrance of the inspection passage of the fixed door, and the movable door is slidingly connected with the two slideways; the second hydraulic oil tank is arranged on the surface of the movable door; a telescopic rod is provided between the first hydraulic oil tank and the second hydraulic oil tank, and the telescopic rod coincides with the symmetry center line of the two slideways.

[0007] In a feasible implementation, a sealing ring is provided at the edge of the inspection passage of the fixed door.

[0008] In a feasible implementation, grooves are provided on opposite sides of the slideway, the movable door is inserted into the grooves, and the movable door slides along the grooves.

[0009] In a feasible implementation, a pin shaft is further included, and slide gears are provided at the four corners of the movable door. The slide gears are connected to the movable door through the pin shaft, and the slide gears are slidably connected to the slide.

[0010] In a feasible implementation, the groove includes a first groove and a second groove, and the first groove and the second groove are arranged in parallel.

[0011] In a feasible implementation, it also includes a bolt buckle, which includes a screw and a nut, the screw is movably connected to the movable door, and the nut is fixedly connected to the fixed door; when the movable door closes the entrance to the fixed door inspection passage, the screw is threadedly matched with the nut.

[0012] In a feasible implementation, a valve is further included, wherein the valve is connected to the oil circuit of the second hydraulic oil tank and is used to control the start and stop of the second hydraulic oil tank.

[0013] The present application provides a TBM cutter head access inspection channel protection device, comprising a fixed door, a movable door and a first hydraulic oil tank; the movable door is slidably connected to the fixed door, the fixed door is arranged at the connection between the cutter head inner armor and the main drive and is fixedly connected to the cutter head inner armor, the first hydraulic oil tank is located at the starting end or the end end of the movable door stroke and is fixedly connected to the fixed door; a slideway and a second hydraulic oil tank are arranged on the fixed door, the two slideways are symmetrically arranged at both ends of the inspection channel entrance of the fixed door, and the movable door is slidably connected to the two slideways; the second hydraulic oil tank is arranged on the surface of the movable door; a telescopic rod is arranged between the first hydraulic oil tank and the second hydraulic oil tank, and the telescopic rod coincides with the symmetric center line of the two slideways. Through the TBM cutter head access inspection channel protection device arranged at the inner armor and the main drive, an additional sealing system is added by using the movable door to prevent debris from entering the TBM cutter head access inspection channel during excavation. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the technical solution of the present application, the drawings required for use in the embodiments are briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0015] Figure 1 It is a schematic diagram of the movable door in the open state;

[0016] Figure 2 It is a schematic diagram of the closed state of the movable door;

[0017] Figure 3 is a schematic diagram of a side view of a sliding door assembly;

[0018] Figure 4This is a schematic diagram of the installation position of the TBM cutter head access inspection channel protection device provided by this device.

[0019] Description of reference numerals:

[0020] Among them: 1-inner armor of the blade, 2-main drive; 3-fixed door; 31-slide; 32-second hydraulic oil tank; 33-sealing ring; 34-pin shaft; 35-groove; 351 first groove-; 352-second groove; 4-movable door; 41-slide gear; 5-first hydraulic oil tank; 6-telescopic rod; 7-bolt buckle; 71-screw; 72-nut. DETAILED DESCRIPTION

[0021] In order to enable those skilled in the art to better understand the technical solutions in the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without creative work should fall within the scope of protection of the present application.

[0022] The cutterhead is one of the core components of the TBM (tunnel boring machine) and is located at the front end of the tunnel boring machine. The main function of the cutterhead is to crush the rock with a disc-shaped roller by rotating and advancing, so that the entire cross-section of the tunnel can be formed at one time. During the TBM excavation process, the rock is broken into small pieces or powder under the cutting action of the tool. These gravels or powders will accumulate in the excavation area. If the design or management of the maintenance channel is improper, these gravels may enter the inside of the cutterhead through the maintenance channel. Once entering the inside of the cutterhead, it may have an adverse effect on the normal operation of the cutterhead. For example, gravel may accumulate in the transmission mechanism or bearings of the cutterhead, causing difficulty or damage to the cutterhead. In addition, gravel may also cause wear on the cutter on the cutterhead, reducing the excavation efficiency. The present application sets a TBM cutterhead entry inspection channel protection device at the inner armor and the main drive, and uses a movable door to add an additional sealing system to prevent residues from entering the TBM cutterhead entry inspection channel during excavation.

[0023] The technical solution provided by this application is described in detail below with reference to the accompanying drawings:

[0024] TBM (Tunnel Boring Machine) consists of a main machine and a rear supporting frame. The TBM main machine is the core part, which mainly includes the cutterhead, cutterhead drive system, main drive system, etc. The main drive system is usually composed of an electric motor, a reducer, a transmission bearing, etc., which is used to provide power for the TBM main machine. The cutterhead drive system provides power to the cutterhead, enabling it to rotate at high speed to cut and crush rocks.

[0025] The cutter disc has many structural forms, such as flat, conical, spherical, etc. At present, large-diameter tunnel boring machines usually use flat cutter discs. The cutter disc is provided with a cutter disc inner armor, which is located inside the cutter disc and is used to protect the drive system, transmission device and other key components inside the cutter disc, and prevent rock fragments, mortar and other debris generated during the excavation process from entering the cutter disc, thereby affecting the normal operation of the cutter disc. Since the cutter disc will inevitably be worn or damaged by rocks during operation, the cutter disc inner armor is reserved with an access access channel to facilitate the repair or replacement of the cutter disc. Adding an additional sealing system to the open access access channel to prevent residues from entering the TBM cutter disc access access channel during excavation is very important for the normal operation of the TBM cutter disc.

[0026] Reference Figure 1 , Figure 2 and Figure 4 As shown, an embodiment of the present application provides a TBM cutter head access inspection channel protection device, which is installed between the cutter head inner armor 1 and the main drive 2 to seal the cutter head access inspection channel to prevent gravel, mortar or other debris generated during excavation from entering the cutter head.

[0027] The structure of the device includes a fixed door 3, a movable door 4 and a first hydraulic oil tank 5; the movable door 4 is slidably connected to the fixed door 3, the fixed door 3 is arranged at the connection between the inner armor 1 of the cutter disc and the main drive 2, the fixed door 3 is fixedly connected to the inner armor 1 of the cutter disc, and the first hydraulic oil tank 5 is close to the starting end of the travel of the movable door 4 and is fixedly connected to the fixed door 3.

[0028] In this embodiment, the fixed connection between the fixed door 3 and the cutter head inner armor 1 can be welded. The use of welding connection enhances the structural strength and ensures the stability of the device during the excavation process. In addition, a detachable connection method such as bolt connection can also be used. It should be noted that when a detachable connection method is used, a sealing ring needs to be provided between the fixed door 3 and the cutter head inner armor 1 to ensure the sealing of the connection between the two and prevent mortar from entering. At the same time, the bolt tightening force between the two needs to meet the process requirements to ensure the stability and safety of the device during the excavation process.

[0029] In this embodiment, the first hydraulic oil tank 5 is located at the starting end of the travel of the moving door 4, and the starting end is defined as the position of the moving door 4 when the inspection port of the fixed door 3 is in an open state, that is, when the moving door 4 does not close the inspection passage. The fixed door 3 is provided with a slide 31 and a second hydraulic oil tank 32, and the two slides 31 are symmetrically arranged at both ends of the entrance of the inspection passage of the fixed door 3, and the moving door 4 is slidably connected with the two slides 31. The slide 31 is used to limit the travel of the moving door 4, and the length of the slide 31 is set according to the size of the inspection passage starting from the fixed door 3, and at the same time, it ensures that the movement of the moving door 4 is smoother.

[0030] The second hydraulic oil tank 32 is arranged on the surface of the movable door 4; a telescopic rod 6 is arranged between the first hydraulic oil tank 5 and the second hydraulic oil tank 32, and the telescopic rod 6 coincides with the symmetric center line of the two slideways 31. Figure 1 and Figure 2 As shown, the first hydraulic oil tank 5 is located above the movable door 4 and connected to the fixed door 3, and the second hydraulic oil tank 32 is fixedly connected to the surface of the movable door 4. When working, the first hydraulic oil tank 5 pushes the movable door 4 downward through the telescopic rod 6 to complete the closure of the inspection passage, and the second hydraulic oil tank 32 pushes the movable door 4 upward through the telescopic rod 6 to complete the opening of the inspection passage.

[0031] Reference Figure 1 and Figure 2 As shown, in some embodiments, a sealing ring 33 is provided at the edge of the inspection passage of the fixed door 3 to further enhance the sealing effect and effectively prevent mortar, dust and other debris from entering the cutter head.

[0032] Reference Figure 3 As shown, in some embodiments, a groove 35 is opened on the opposite side of the slide 31, and the movable door 4 is inserted into the groove 35, and the movable door 4 slides along the groove 35. This structural design enhances the stability of the connection structure between the movable door 4 and the slide 31 and the smoothness of sliding.

[0033] Reference Figure 2 and Figure 3 As shown, in some embodiments, a pin shaft 34 is further included, and slideway gears 41 are provided at the four corners of the movable door 4. The slideway gear 41 is connected to the movable door 4 through the pin shaft 34, and the slideway gear 41 is slidably connected to the slideway 31. The setting of the gear makes the sliding smoother. In addition, in some other embodiments, the opening of the movable door 4 is controlled by controlling the rotation of the slideway gear 41, and the remote control of the movable door 4 can be further realized by adding an automatic control device such as a motor.

[0034] Reference Figure 3 As shown, in some embodiments, the groove 35 includes a first groove 351 and a second groove 352 , and the first groove 351 and the second groove 352 are arranged in parallel.

[0035] Reference Figure 1 As shown, in some embodiments, a bolt buckle 7 is further included, and the bolt buckle 7 includes a screw rod 71 and a nut 72. The screw rod 71 is movably connected to the movable door 4, and the nut 72 is fixedly connected to the fixed door 3. When the movable door 4 closes the entrance of the inspection passage of the fixed door 3, the screw rod 71 is threadedly connected with the nut 72. This structure can better fix the movable door 4, prevent the movable door 4 from being accidentally opened, and enhance the reliability of the device.

[0036] In some embodiments, a valve is further included, which is connected to the oil circuit of the second hydraulic oil tank 32 and is used to control the start and stop of the second hydraulic oil tank 32 .

[0037] According to the above technical features, the TBM cutter head entering the maintenance channel protection device provided by this application is used to prevent gravel, mortar or other debris generated during the excavation process from entering the inside of the cutter head, ensuring the normal operation of the cutter head. This device is installed between the inner armor of the cutter head and the main drive, and the fixed door 3 is fixed to the inner armor 1 of the cutter head by welding or bolting to ensure the stability and sealing of the structure. The movable door 4 is slidably connected to the fixed door 3 through the slide 31, and is driven to move by the first hydraulic oil tank 5 and the second hydraulic oil tank 32 through the telescopic rod 6 to realize the opening and closing of the maintenance channel. In addition, the device is also designed with auxiliary structures such as sealing ring 33, slide gear 41, groove 35 and bolt buckle 7 to enhance the sealing effect, sliding smoothness and reliability of the device. The protective device has a simple structure and is easy to operate. It can effectively protect the key components inside the cutter head and improve the working efficiency and safety of the TBM.

[0038] It is easy to understand that those skilled in the art can combine, split, reorganize, etc. the embodiments of the present application to obtain other embodiments based on the several embodiments provided in the present application, and these embodiments do not exceed the protection scope of the present application.

[0039] The above specific implementation methods further explain in detail the purpose, technical solutions and beneficial effects of the embodiments of the present application. It should be understood that the above are only specific implementation methods of the embodiments of the present application and are not used to limit the protection scope of the embodiments of the present application. Any modifications, equivalent substitutions, improvements, etc. made on the basis of the technical solutions of the embodiments of the present application should be included in the protection scope of the embodiments of the present application.

Claims

1. A TBM cutter head access inspection channel protection device, comprising a cutter head inner armor (1) and a main drive (2), characterized in that: It also comprises a fixed door (3), a movable door (4) and a first hydraulic oil tank (5); the movable door (4) is slidably connected to the fixed door (3); the fixed door (3) is arranged at the connection between the inner armor (1) of the cutter head and the main drive (2); the fixed door (3) is fixedly connected to the inner armor (1) of the cutter head; the first hydraulic oil tank (5) is close to the starting end of the travel of the movable door (4) and is fixedly connected to the fixed door (3); The fixed door (3) is provided with a slideway (31) and a second hydraulic oil tank (32), the two slideways (31) are symmetrically arranged at both ends of the entrance of the inspection passage of the fixed door (3), and the movable door (4) is slidably connected to the two slideways (31); the second hydraulic oil tank (32) is arranged on the surface of the movable door (4); a telescopic rod (6) is provided between the first hydraulic oil tank (5) and the second hydraulic oil tank (32), and the telescopic rod (6) coincides with the symmetry center line of the two slideways (31).

2. The TBM cutter head access inspection channel protection device according to claim 1 is characterized in that: A sealing ring (33) is provided at the edge of the inspection passage of the fixed door (3).

3. The TBM cutter head access inspection channel protection device according to claim 1 is characterized in that: A groove (35) is provided on the side opposite to the slideway (31), the movable door (4) is inserted into the groove (35), and the movable door (4) slides along the groove (35).

4. The TBM cutter head access inspection channel protection device according to claim 1 is characterized in that: It also includes a pin shaft (34), and slideway gears (41) are arranged at the four corners of the movable door (4). The slideway gear (41) is connected to the movable door (4) through the pin shaft (34), and the slideway gear (41) is slidably connected to the slideway (31).

5. The TBM cutter head access inspection channel protection device according to claim 3 is characterized in that: The groove (35) comprises a first groove (351) and a second groove (352), and the first groove (351) and the second groove (352) are arranged in parallel.

6. The TBM cutter head access inspection channel protection device according to claim 1 is characterized in that: It also includes a bolt buckle (7), the bolt buckle (7) includes a screw rod (71) and a nut (72), the screw rod (71) is movably connected to the movable door (4), and the nut (72) is fixedly connected to the fixed door (3); when the movable door (4) closes the entrance of the maintenance passage of the fixed door (3), the screw rod (71) and the nut (72) are threadedly connected.

7. The TBM cutter head access inspection channel protection device according to claim 1 is characterized in that: It also comprises a valve, which is connected to the oil circuit of the second hydraulic oil tank (32) and is used to control the start and stop of the second hydraulic oil tank (32).

Images