A shield launching belt conveyor system

Abstract

The shield launching belt conveying system comprises a rack, the rack comprising: a trolley section, a transition section and an extension section, the trolley section and the transition section being sequentially arranged at the tail of a shield device, and the extension section being arranged in a launching shaft and a tunnel and located at the tail of the transition section, the extension section being arranged to extend in the tunneling direction; a plurality of roller groups, the plurality of roller groups being sequentially arranged on the trolley section, the transition section and the extension section, and the roller groups being arranged to surround a belt; wherein the transition section is provided with an inclination angle adjusting mechanism, and the inclination angle adjusting mechanism is used to reduce the inclination angle of the belt on the transition section when the distance between the trolley section and the extension section increases. In the shield launching belt conveying system, the inclination angle adjusting mechanism reduces the inclination angle of the belt on the transition section, thereby smoothly transitioning the slag from the trolley section to the extension section, thereby reducing the belt deviation and slag leakage phenomenon in the belt conveying, and effectively improving the construction efficiency and the stability of the slag transportation.

Description

Technical Field

[0001] This disclosure relates to the field of belt conveyor technology, and in particular to a shield tunneling starting belt conveyor system. Background Technology

[0002] In the initial construction of shield tunnels, the design and implementation of the muck removal system has always been a crucial aspect of improving construction efficiency and ensuring safety. Traditional horizontal and vertical transportation methods are inefficient, difficult to schedule, and pose safety hazards. Conventional belt conveyor systems also often face numerous technical challenges in confined construction sites and complex geological tunnels. For example, in complex tunnel excavation environments, traditional belt conveyor systems lack flexibility, especially in intermediate transition sections, and cannot effectively adapt to positional changes during construction, easily leading to deviation and muck leakage, which seriously affects construction efficiency and the stability of muck transportation. Summary of the Invention

[0003] This disclosure aims to at least partially address one of the technical problems in the related art.

[0004] Therefore, the purpose of this disclosure is to provide a shield tunneling starting belt conveyor system.

[0005] To achieve the above objectives, this disclosure provides a shield tunneling starting belt conveyor system, comprising: a frame, the frame including: a trolley section, a transition section, and an extension section, the trolley section and the transition section being sequentially arranged at the tail of the shield tunneling equipment, and the extension section being arranged in the starting shaft and tunnel and located at the tail of the transition section, the extension section being arranged to extend along the tunneling direction; a plurality of idler roller groups, the plurality of idler roller groups being sequentially arranged on the trolley section, the transition section, and the extension section, and the idler roller groups being used to wind the belt; wherein, the transition section is provided with an inclination adjustment mechanism, and the inclination adjustment mechanism is used to reduce the inclination angle of the belt on the transition section when the distance between the trolley section and the extension section increases.

[0006] Optionally, the tilt adjustment mechanism includes: a support frame movably disposed on the transition section, with the head of the support frame near the tail of the trolley section and the tail of the support frame near the head of the extension section; a plurality of idler roller groups sequentially disposed on the trolley section, the support frame, and the extension section, wherein the height of the tail of the trolley section is less than the height of the head of the extension section; a first drive assembly, which is tractively connected to the head of the support frame and is used to drive the head of the support frame to rise and fall; and a second drive assembly, which is tractively connected to the tail of the support frame and is used to drive the tail of the support frame to rise and fall; wherein the first drive assembly and the second drive assembly are used to reduce the tilt angle of the belt on the transition section when the distance between the trolley section and the extension section increases.

[0007] Optionally, the first drive component and the second drive component are further configured to reduce the inclination angle of the belt on the transition section when the tunneling direction of the tunnel boring machine is tilted downward.

[0008] Optionally, the system further includes a material receiving device, which includes a sealed material receiving hopper, a buffer roller, and multiple anti-overflow skirts; wherein the sealed material receiving hopper, the buffer roller, and the anti-overflow skirts are respectively disposed at the head of the trolley section, and the inlet end of the sealed material receiving hopper is connected to the outlet end of the tunnel boring machine, the buffer roller is located below the outlet end of the sealed material receiving hopper, the buffer roller is used to wind the belt, and the anti-overflow skirts are located on both sides of the outlet end of the sealed material receiving hopper and are disposed close to the belt.

[0009] Optionally, the receiving device further includes an overflow sensor, the detection end of which is disposed on the top inner side of the overflow prevention skirt, and the overflow sensor is used to detect whether the slag material on the inner side of the overflow prevention skirt overflows.

[0010] Optionally, the system further includes: a discharge device, the discharge device comprising: a sealed discharge hopper and a plurality of scrapers; wherein, the sealed discharge hopper is disposed at the tail end of the extension section, and the discharge end of the belt is located inside the sealed discharge hopper; the scrapers are disposed inside the sealed discharge hopper, and the scraping end of the scrapers is close to the belt, and the plurality of scrapers are spaced apart along the running direction of the belt.

[0011] Optionally, a spraying device is provided between adjacent scrapers, and the spraying end of the spraying device faces the belt.

[0012] Optionally, the system further includes a belt storage device, which includes a fixed frame, a movable frame, a plurality of first steering rollers, and a plurality of second steering rollers; wherein the fixed frame is disposed at the tail of the extension section, and the movable frame is slidably disposed relative to the fixed frame in the tunneling direction; the plurality of first steering rollers are spaced apart on the fixed frame, and the plurality of second steering rollers are spaced apart on the movable frame, and the return portion of the belt alternately passes over the plurality of first steering rollers and the plurality of second steering rollers.

[0013] Optionally, the system further includes: a frequency conversion tensioning device, which is disposed on the side of the moving frame away from the fixed frame, and the tensioning end of the frequency conversion tensioning device is connected to the moving frame, and the frequency conversion tensioning device is used to apply a constant force on the moving frame in a direction away from the fixed frame.

[0014] Optionally, the idler assembly includes a trough idler for winding the belt, wherein the trough idler has a trough angle ranging from 45° to 60°.

[0015] The technical solution provided in this disclosure may include the following beneficial effects:

[0016] Because the trolley section and transition section are sequentially located at the tail of the tunnel boring machine (TBM), and the extension section is located inside the tunnel at the tail of the transition section, multiple idler roller sets are sequentially arranged on the trolley section, transition section, and extension section. This allows the trolley section, transition section, and extension section of the machine frame to effectively support multiple idler roller sets. These idler roller sets provide support and guidance for the conveyor belt, which in turn facilitates the transport of excavated material. Furthermore, since the trolley section and transition section move with the TBM, and the extension section extends along the tunneling direction, the trolley section, transition section, and extension section of the machine frame can adapt to the continuous tunneling progress of the TBM, ensuring the continuous operation of the conveyor belt. As the TBM advances, when the distance between the trolley section and the extension section increases but the extension section has not yet been completed, the tilt adjustment mechanism reduces the tilt angle of the conveyor belt on the transition section, thus smoothly transitioning the excavated material from the trolley section to the extension section. This reduces belt misalignment and leakage during conveyor transport, effectively improving construction efficiency and the stability of excavated material transportation.

[0017] Additional aspects and advantages of this disclosure will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this disclosure. Attached Figure Description

[0018] The above and / or additional aspects and advantages of this disclosure will become apparent and readily understood from the following description of the embodiments taken in conjunction with the accompanying drawings, in which:

[0019] Figure 1 This is a schematic diagram of the structure of a shield tunneling starting belt conveyor system according to an embodiment of this disclosure;

[0020] Figure 2 This is a schematic diagram of the tilt adjustment mechanism in a shield tunneling starting belt conveyor system according to an embodiment of this disclosure;

[0021] Figure 3 This is a schematic diagram of the material receiving device in a shield tunneling starting belt conveyor system according to an embodiment of this disclosure;

[0022] Figure 4 This is a schematic diagram of the structure of the unloading device in a shield tunneling starting belt conveyor system according to an embodiment of this disclosure;

[0023] Figure 5 This is a schematic diagram of the belt storage device in a shield tunneling starting belt conveyor system according to an embodiment of this disclosure;

[0024] As shown in the figure: 1. Trolley section, 2. Transition section, 3. Extension section, 4. Idler roller group;

[0025] 5. Tilt adjustment mechanism; 51. Support frame; 52. First drive assembly; 53. Second drive assembly;

[0026] 6. Material receiving device; 61. Sealed material receiving hopper; 62. Buffer roller; 63. Anti-overflow skirt; 64. Overflow sensor.

[0027] 7. Unloading device; 71. Sealed unloading hopper; 72. Scraper; 73. Spraying device;

[0028] 8. Belt storage device; 81. Fixed frame; 82. Moving frame; 83. First steering roller; 84. Second steering roller;

[0029] 9. Variable frequency tensioning device; 10. Vulcanizing device; 11. Drive device; 12. Belt.

[0030] 100. Tunnel boring machine (TBM) equipment. Detailed Implementation

[0031] Embodiments of this disclosure are described in detail below, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are used only to explain this disclosure, and should not be construed as limiting this disclosure. Rather, embodiments of this disclosure include all variations, modifications, and equivalents falling within the spirit and scope of the appended claims.

[0032] like Figure 1 and Figure 2As shown in the figure, this disclosure proposes a shield tunneling machine launching belt conveyor system, including: a frame and multiple idler roller groups 4. The frame includes: a trolley section 1, a transition section 2, and an extension section 3. The trolley section 1 and the transition section 2 are sequentially arranged at the tail of the shield tunneling equipment 100, and the extension section 3 is arranged in the launching shaft and tunnel and located at the tail of the transition section 2. The extension section 3 is arranged to extend along the tunneling direction. Multiple idler roller groups 4 are sequentially arranged on the trolley section 1, the transition section 2, and the extension section 3, and the idler roller groups 4 are used to wind the belt 12. The transition section 2 is provided with an inclination adjustment mechanism 5, and the inclination adjustment mechanism 5 is used to reduce the inclination angle of the belt 12 on the transition section 2 when the distance between the trolley section 1 and the extension section 3 increases.

[0033] Understandably, since the trolley section 1 and transition section 2 are sequentially located at the tail of the tunnel boring machine 100, and the extension section 3 is located in the launching shaft and tunnel and at the tail of the transition section 2, and multiple idler roller groups 4 are sequentially located on the trolley section 1, transition section 2 and extension section 3, the trolley section 1, transition section 2 and extension section 3 of the frame can effectively support the multiple idler roller groups 4, thereby using the multiple idler roller groups 4 to support and guide the belt conveyor 12, and then using the belt conveyor 12 to transport the slag. Furthermore, since the trolley section 1 and transition section 2 move with the tunnel boring machine 100, and the extension section 3 is arranged to extend along the tunneling direction, the trolley section 1, transition section 2 and extension section 3 of the frame can adapt to the continuous tunneling of the tunnel boring machine 100, ensuring the continuous operation of the belt conveyor 12.

[0034] As the tunnel boring machine 100 advances, when the distance between the trolley section 1 and the extension section 3 increases and the extension section 3 has not yet been completed, the tilt angle adjustment mechanism 5 reduces the tilt angle of the belt 12 on the transition section 2, thereby smoothly transitioning the slag from the trolley section 1 to the extension section 3, thus reducing the deviation and slag leakage in the conveyor belt 12, and effectively improving construction efficiency and the stability of slag transportation.

[0035] It should be noted that the belt conveyor system based on the tilt adjustment mechanism 5 has a more compact structure, which can adapt to the narrow construction space and complex geological tunnels during shield tunneling. Its flexible operation overcomes the space limitation problem of traditional belt conveyors and effectively improves the slag removal efficiency.

[0036] Specifically, the adoption of the tilt adjustment mechanism 5 effectively reduces system failures and downtime, improves system stability and reliability, not only extends the service life of the system, but also allows the system to work continuously for more than 90% of the time during the initial stage, which is far higher than the traditional horizontal grouping + vertical slag discharge method.

[0037] The frame is used to arrange the roller group 4 along the length of the tunnel to support and guide the belt 12, thereby assisting the shield machine 100 in the excavation of the starting section. In the frame, the trolley section 1 is located at the tail of the shield machine 100 and moves directly with the shield machine 100. The transition section 2 is located at the tail of the trolley section 1 and moves indirectly with the shield machine 100. The extension section 3 is located at the tail of the transition section 2 and is arranged in the tunnel. It does not move with the shield machine 100. In order to adapt to the continuously excavating shield machine 100 and the advancing trolley section 1 and transition section 2, the extension section 3 needs to be extended along the excavation direction as the shield machine 100 excavates. The specific types of the trolley section 1, transition section 2, and extension section 3 can be set according to actual needs and are not restricted. For example, the trolley section 1, transition section 2, and extension section 3 are all composed of multiple longitudinal beams, multiple transverse beams, and other beams. For the trolley section 1 and transition section 2, the bottom is equipped with traveling wheels to cooperate with the guide rail at the bottom of the tunnel to achieve follow-up movement. For the extension section 3, the bottom is directly arranged in the tunnel, and as the shield tunneling equipment 100 advances, the extension section 3 continuously adds longitudinal beams, transverse beams, and other supporting beams to achieve effective support and guidance for the belt conveyor 12.

[0038] The idler roller group 4 is used to support and guide the belt 12. The idler roller group 4 includes an upper idler roller group 4 and a lower idler roller group 4. The upper idler roller group 4 supports and guides the feeding section (upper) of the belt 12, and the lower idler roller group 4 supports and guides the return section (lower) of the belt 12. The specific type of the idler roller group 4 can be set according to actual needs and is not limited thereto. The idler roller group 4 also includes longitudinal beams, cross beams, and other supporting components for arranging the upper idler roller group 4 and the lower idler roller group 4.

[0039] The tilt angle adjustment mechanism 5 is used to adjust the tilt angle of the belt 12 on the transition section 2 according to the distance between the trolley section 1 and the extension section 3, so as to make the slag material transition smoothly from the trolley section 1 to the extension section 3. Specifically, when the distance between the trolley section 1 and the extension section 3 increases, the tilt angle of the belt 12 on the transition section 2 decreases; when the distance between the trolley section 1 and the extension section 3 increases, the tilt angle of the belt 12 on the transition section 2 decreases. The specific type of the tilt angle adjustment mechanism 5 can be set according to actual needs and is not limited thereto.

[0040] like Figure 2As shown, in some embodiments, the tilt adjustment mechanism 5 includes: a support frame 51, a first drive assembly 52, and a second drive assembly 53. The support frame 51 is movably mounted on the transition section 2, with its head close to the tail of the trolley section 1 and its tail close to the head of the extension section 3. Multiple idler roller groups 4 are sequentially mounted on the trolley section 1, the support frame 51, and the extension section 3. The height of the tail of the trolley section 1 is less than the height of the head of the extension section 3. The first drive assembly 52 is drivenly connected to the head of the support frame 51 and is used to drive the head of the support frame 51 to rise and fall. The second drive assembly 53 is drivenly connected to the tail of the support frame 51 and is used to drive the tail of the support frame 51 to rise and fall. The first drive assembly 52 and the second drive assembly 53 are used to reduce the tilt angle of the belt 12 on the transition section 2 when the distance between the trolley section 1 and the extension section 3 increases.

[0041] Understandably, since the support frame 51 is movably mounted on the transition section 2, and the first drive assembly 52 is connected to the head of the support frame 51 via transmission, and the second drive assembly 53 is connected to the tail of the support frame 51 via transmission, the support frame 51 can adjust its tilt angle by utilizing the lifting drive of the first drive assembly 52 and the lifting drive of the second drive assembly 53. Thus, when the distance between the trolley section 1 and the extension section 3 increases, the first drive assembly 52 and the second drive assembly 53 cooperate to reduce the tilt angle of the belt 12 on the transition section 2, thereby smoothly transitioning the slag from the trolley section 1 to the extension section 3, thereby reducing the deviation and slag leakage during the conveying of the belt 12, and effectively improving construction efficiency and the stability of slag transportation.

[0042] It should be noted that the first drive component 52 is used to drive the head of the support frame 51 to rise and fall. The specific type of the first drive component 52 can be set according to actual needs and is not limited thereto. For example, the first drive component 52 can be a servo electric cylinder, which is arranged at the head of the support frame 51, and its extension and retraction action realizes the raising and lowering of the head of the support frame 51. In particular, the servo electric cylinder can also provide feedback on the extension and retraction length, and then use the extension and retraction length of the first drive component 52 to calculate the tilt angle of the support frame 51.

[0043] The second drive assembly 53 is used to drive the rear end of the support frame 51 to rise and fall. The specific type of the second drive assembly 53 can be set according to actual needs and is not limited thereto. For example, the second drive assembly 53 can be a servo electric cylinder, which is arranged at the rear end of the support frame 51. Its telescopic movement realizes the raising and lowering of the rear end of the support frame 51. In particular, the servo electric cylinder can also provide feedback on the telescopic length, and then use the telescopic length of the second drive assembly 53 to calculate the tilt angle of the support frame 51.

[0044] The movable arrangement of the support frame 51 can be achieved using the first drive assembly 52 and the second drive assembly 53. For example, one end of the first drive assembly 52 is fixed to the transition section 2, and the other end is hinged to the head of the support frame 51, while one end of the second drive assembly 53 is hinged to the transition section 2, and the other end is hinged to the head of the support frame 51.

[0045] The coordination method of the first drive component 52 and the second drive component 53 can be set according to actual needs and is not limited. For example, the first drive component 52 does not move, while the second drive component 53 performs a telescopic movement; the first drive component 52 performs a telescopic movement, while the second drive component 53 does not move; the first drive component 52 and the second drive component 53 perform telescopic movements simultaneously, and the telescopic directions are opposite; the first drive component 52 and the second drive component 53 perform telescopic movements simultaneously, and the telescopic directions are the same, but the telescopic amplitudes are different.

[0046] In some embodiments, the first drive component 52 and the second drive component 53 are also used to reduce the inclination angle of the belt 12 on the transition section 2 when the tunneling direction of the tunnel boring machine 100 is tilted downward.

[0047] Understandably, when the tunneling direction of the shield machine 100 is tilted downward, the first drive assembly 52 and the second drive assembly 53 work together to reduce the inclination angle of the belt 12 on the transition section 2, so that the belt 12 can smoothly transition the slag from the trolley section 1 to the extension section 3, thereby reducing the deviation and slag leakage in the conveying of the belt 12, and effectively improving the construction efficiency and the stability of the slag transportation.

[0048] It should be noted that when the tunneling direction of the shield machine 100 is inclined downward, the inclination angle of the belt 12 on the horizontal plane of the transition section 2 is large and the slope is too steep, which can easily lead to problems such as belt 12 running off track and slag leakage. Therefore, the first drive assembly 52 and the second drive assembly 53 work together to drive the support frame 51 to reduce the inclination angle of the belt 12 on the transition section 2, thereby reducing the belt 12 running off track and slag leakage during transport.

[0049] like Figure 3 As shown, in some embodiments, the system further includes a receiving device 6, which includes a sealed receiving hopper 61, a buffer roller 62, and multiple anti-overflow skirts 63. The sealed receiving hopper 61, the buffer roller 62, and the anti-overflow skirts 63 are respectively located at the head of the trolley section 1, with the inlet end of the sealed receiving hopper 61 connected to the outlet end of the tunnel boring machine 100. The buffer roller 62 is located below the outlet end of the sealed receiving hopper 61 and is used to wind around the belt 12. The anti-overflow skirts 63 are located on both sides of the outlet end of the sealed receiving hopper 61 and are positioned close to the belt 12.

[0050] It is understandable that, since the feed end of the sealed receiving hopper 61 is connected to the discharge end of the tunnel boring machine 100, and the buffer roller 62 is located below the discharge end of the sealed receiving hopper 61, and the belt 12 is wound around the buffer roller 62, the slag material conveyed by the tunnel boring machine 100 can enter the belt 12 supported and guided by the buffer roller 62 through the sealed receiving hopper 61, and then the slag material is conveyed by the operation of the belt 12.

[0051] Among them, the sealing structure of the sealed receiving hopper 61 can reduce the leakage of slag during the process of the shield machine 100 transferring slag to the belt 12; the buffer structure of the buffer roller 62 can buffer the impact of large-diameter slag during the process of the shield machine 100 transferring slag to the belt 12, reducing the impact and wear on the belt 12; and the arrangement of the anti-overflow skirt 63 can form a limit on both sides of the belt 12 during the process of the shield machine 100 transferring slag to the belt 12, thereby reducing the overflow of slag.

[0052] It should be noted that the sealed receiving hopper 61 is used to form a relatively closed receiving space at the discharge end of the tunnel boring machine 100. The specific type of the sealed receiving hopper 61 can be set according to actual needs and there is no limitation. For example, the sealed receiving hopper 61 can be a closed bucket-shaped structure, and the top or side of the bucket-shaped structure is provided with an inlet to accommodate the discharge end (wear-resistant chute) of the tunnel boring machine 100. Flexible sealing elements are provided around the inlet, and the bottom of the bucket-shaped structure is provided with an outlet for discharging material. The outlet is located near the belt 12.

[0053] The buffer roller 62 is used to support and guide the belt 12, as well as to buffer the impact of large-diameter slag. The feed end of the belt 12 is located at the buffer roller 62. The specific type of the buffer roller 62 can be set according to actual needs and there is no restriction on it.

[0054] The anti-overflow skirt 63 is used to form a limit on both sides of the belt 12 to reduce the overflow of slag. The specific type of anti-overflow skirt 63 can be set according to actual needs and there is no restriction. For example, the anti-overflow skirt 63 is an inclined plate structure, and the anti-overflow skirt 63 is set close to the belt 12 and does not affect the operation of the belt 12.

[0055] like Figure 3 As shown, in some embodiments, the receiving device 6 further includes an overflow sensor 64, the detection end of which is disposed on the top inner side of the anti-overflow skirt 63, and the overflow sensor 64 is used to detect whether the slag material inside the anti-overflow skirt 63 overflows.

[0056] Understandably, since the detection end of the overflow sensor 64 is located on the top inner side of the anti-overflow skirt 63, the overflow sensor 64 can detect whether the slag inside the anti-overflow skirt 63 overflows. Thus, the overflow sensor 64 can obtain the slag filling status on the conveyor belt 12 in real time, and then adjust the system's operating parameters in a timely manner according to the slag filling status to ensure stable and efficient slag transportation.

[0057] It should be noted that the overflow sensor 64 is used to detect whether the slag inside the anti-overflow skirt 63 has overflowed. The specific type of overflow sensor 64 can be set according to actual needs and there is no limitation. For example, the overflow sensor 64 can be a photoelectric switch, etc.

[0058] like Figure 4 As shown, in some embodiments, the system further includes a discharge device 7, which comprises a sealed discharge hopper 71 and a plurality of scrapers 72. The sealed discharge hopper 71 is located at the tail end of the extension section 3, and the discharge end of the belt 12 is located inside the sealed discharge hopper 71. The scrapers 72 are located inside the sealed discharge hopper 71, and the scraping ends of the scrapers 72 are close to the belt 12. The plurality of scrapers 72 are spaced apart along the running direction of the belt 12.

[0059] Understandably, since the sealed unloading hopper 71 is located at the tail of the extension section 3 and the discharge end of the belt 12 is located inside the sealed unloading hopper 71, the slag conveyed by the belt 12 from the shield equipment 100 can be discharged using the sealed unloading hopper 71. At the same time, the sealing structure of the sealed unloading hopper 71 can reduce the leakage of slag during the discharge of slag by the belt 12.

[0060] Since the scraper 72 is installed inside the sealed discharge hopper 71 and the scraping end of the scraper 72 is close to the belt 12, and multiple scrapers 72 are distributed at intervals along the running direction of the belt 12, the belt 12 can effectively remove slag, debris and other materials attached to the belt 12 while it is running, thereby ensuring the efficient operation of the system.

[0061] It should be noted that the sealed discharge hopper 71 is used to form a relatively closed discharge space at the discharge end of the belt 12. The specific type of the sealed discharge hopper 71 can be set according to actual needs and is not limited thereto. For example, the sealed discharge hopper 71 can be a closed bucket-shaped structure, and the top or side of the bucket-shaped structure is provided with an inlet to accommodate the discharge end of the belt 12. Flexible sealing elements are provided around the inlet, and the bottom of the bucket-shaped structure is provided with an outlet for discharging material.

[0062] The scraper 72 is used to scrape off slag, debris and other materials on the belt 12. The specific type of scraper 72 can be set according to actual needs and there is no limitation. For example, the scraper 72 can be an alloy scraper 72.

[0063] like Figure 4 As shown, in some embodiments, a spraying device 73 is provided between adjacent scrapers 72, and the spraying end of the spraying device 73 faces the belt 12.

[0064] It is understandable that, since a spraying device 73 is provided between adjacent scrapers 72 and the spraying end of the spraying device 73 is facing the belt 12, the belt 12 can effectively remove slag, debris and other materials attached to the belt 12 by spraying multiple spraying devices 73 while it is running, thereby ensuring the efficient operation of the system.

[0065] It should be noted that the spray device 73, together with the scraper 72, is used to remove slag, debris and other materials attached to the belt 12. The specific type of the spray device 73 can be set according to actual needs and there is no limitation. For example, the spray device 73 uses the cooperation of the pump body and the nozzle to pressurize and spray clean water from the site onto the belt 12. At the same time, the automatic operation of the spray is achieved by using the opening and closing of the valve body and the like.

[0066] like Figure 5 As shown, in some embodiments, the system further includes a belt storage device 8, which includes a fixed frame 81, a movable frame 82, a plurality of first steering rollers 83, and a plurality of second steering rollers 84. The fixed frame 81 is located at the tail of the extension section 3, and the movable frame 82 is slidably disposed relative to the fixed frame 81 along the tunneling direction. The plurality of first steering rollers 83 are spaced apart on the fixed frame 81, and the plurality of second steering rollers 84 are spaced apart on the movable frame 82. The return portion of the belt 12 alternately passes over the plurality of first steering rollers 83 and the plurality of second steering rollers 84.

[0067] It is understandable that, since the moving frame 82 is slidably arranged relative to the fixed frame 81 along the tunneling direction, and the return portion of the belt 12 alternately passes around multiple first steering rollers 83 on the fixed frame 81 and multiple second steering rollers 84 on the moving frame 82, a large portion of the belt 12 can be stored between the fixed frame 81 and the moving frame 82. At the same time, by utilizing the movement of the moving frame 82, the belt 12 can be extended during the tunneling process of the shield tunneling equipment 100, thereby ensuring the stable conveying of slag by the belt 12.

[0068] It should be noted that the fixed frame 81 is used to support multiple first steering rollers 83, and works with the moving frame 82 to realize the storage and release of the belt 12. The specific type of the fixed frame 81 can be set according to actual needs, and there is no restriction on it.

[0069] The movable frame 82 is used to support multiple second steering rollers 84 and works with the fixed frame 81 to store and release the belt 12. The specific type of the movable frame 82 can be set according to actual needs and is not limited thereto. The movable frame 82 and the fixed frame 81 have the same structure, and the bottom of the movable frame 82 is also provided with a sliding wheel for sliding arrangement. The sliding wheel is rolled on the track inside the tunnel.

[0070] The first steering roller 83 and the second steering roller 84 are used to arrange the belt 12. The specific types of the first steering roller 83 and the second steering roller 84 can be set according to actual needs and are not limited thereto. The belt 12 is wound around multiple first steering rollers 83 and multiple second steering rollers 84. For example, the belt 12 wraps around the first first steering roller 83, then around the first second steering roller 84, then around the second first steering roller 83, and then around the second second steering roller 84. Thus, the belt 12 is continuously and alternately wound around multiple first steering rollers 83 and multiple second steering rollers 84 to achieve belt 12 storage.

[0071] like Figure 1 and Figure 5 As shown, in some embodiments, the system further includes a frequency conversion tensioning device 9, which is disposed on the side of the moving frame 82 away from the fixed frame 81, and the tensioning end of the frequency conversion tensioning device 9 is connected to the moving frame 82. The frequency conversion tensioning device 9 is used to apply a constant force on the moving frame 82 in a direction away from the fixed frame 81.

[0072] Understandably, since the frequency conversion tensioning device 9 is located on the side of the moving frame 82 away from the fixed frame 81, and the tensioning end of the frequency conversion tensioning device 9 is connected to the moving frame 82, the frequency conversion tensioning device 9 can apply a constant force on the moving frame 82 in a direction away from the fixed frame 81. Thus, when the shield tunneling equipment 100 is tunneling and dragging the belt 12, the moving frame 82 can move stably and release the belt 12, thereby ensuring the stable conveying of slag by the belt 12 while extending the belt 12.

[0073] It should be noted that the variable frequency tensioning device 9 is used to apply a constant force on the moving frame 82 in a direction away from the fixed frame 81. The constant force should be less than the force when the shield tunneling equipment 100 is tunneling and dragging the belt 12. The specific type of variable frequency tensioning device 9 can be set according to actual needs and there is no restriction. For example, the variable frequency tensioning device 9 can be a winch.

[0074] When the belt storage device 8 releases the belt 12 until the moving frame 82 approaches the fixed frame 81, the vulcanizing device 10 can be used to extend the belt 12. At the same time, while the belt 12 is extended, the frequency conversion tensioning device 9 is used to drive the moving frame 82 away from the fixed frame 81.

[0075] The drive unit 11 of the belt 12 can be located near the vulcanizing unit 10, and there are no restrictions on this.

[0076] In some embodiments, the idler roller group 4 includes: a trough idler roller, which is used to wind the belt 12, and the trough angle of the trough idler roller is in the range of 45°-60°.

[0077] Understandably, since the trough angle of the trough rollers wound around the belt 12 is set to 45°-60°, the trough angle of the roller group 4 is larger, thereby reducing the space occupied and enabling the system to adapt to the extreme construction space.

[0078] It should be noted that the trough-shaped idler roller with a large trough angle is used to support and guide the belt 12, as well as to reduce space occupation. The specific type of trough-shaped idler roller can be set according to actual needs, and there are no restrictions on it.

[0079] Among them, the reversing roller in the idler roller group 4 can also be a built-in bearing roller to further reduce the space occupied.

[0080] For the system in this embodiment, key components such as belt 12, idler roller group 4, scraper 72, spray device 73, drum, drive device 11, etc. can be reused with the formal tunneling belt 12 machine to reduce the procurement and replacement costs of new parts, while improving the utilization rate of parts.

[0081] In summary, the system of this embodiment can include the following beneficial effects:

[0082] Improved construction efficiency: Through its compact structure and intelligent control, the system can be flexibly arranged and operate efficiently in confined construction spaces, overcoming the space limitations of traditional belt conveyors; the system can continuously and stably transport slag and improve slag discharge efficiency. In the initial stage, the continuous working time of the belt conveyor can reach more than 90%, which is far higher than the traditional horizontal grouping + vertical slag discharge method.

[0083] Enhanced system stability and reliability: The adoption of tilt adjustment mechanism 5 and intelligent control effectively reduces equipment failures and downtime, improves system stability and reliability, and extends equipment service life; the fully sealed material receiving and unloading structure and automatic cleaning structure reduce slag leakage and channel blockage, ensuring the safety and environmental protection of the slag discharge process.

[0084] Reduced construction costs: By reusing parts and sharing equipment, the costs of repeated procurement and replacement of equipment are reduced, thereby lowering the overall equipment investment and maintenance costs of the project; the introduction of intelligent control reduces manual intervention and failure rate, thus saving a lot of human and material resources and further reducing construction costs.

[0085] Civilized construction: The fully sealed structure and automatic cleaning structure effectively prevent the pollution of the environment caused by the leakage of construction waste, meet the requirements of environmentally friendly construction, and improve the level of civilized construction during the construction process.

[0086] This embodiment provides a high-efficiency, stable, and low-cost shield tunneling starting belt conveyor system, which can significantly improve the efficiency and safety of shield tunneling starting construction, reduce costs, and has broad application prospects.

[0087] It should be noted that in the description of this disclosure, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance. Furthermore, in the description of this disclosure, unless otherwise stated, "a plurality of" means two or more.

[0088] Any process or method description in the flowchart or otherwise herein can be understood as representing a module, segment, or portion of code comprising one or more executable instructions for implementing a particular logical function or process, and the scope of preferred embodiments of this disclosure includes additional implementations in which functions may be performed not in the order shown or discussed, including substantially simultaneously or in reverse order depending on the function involved, as will be understood by those skilled in the art to which embodiments of this disclosure pertain.

[0089] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this disclosure. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0090] Although embodiments of the present disclosure have been shown and described above, it is to be understood that the above embodiments are exemplary and should not be construed as limiting the present disclosure. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present disclosure.

Claims

1. A shield tunneling starting belt conveyor system, characterized in that, include: The frame includes a trolley section, a transition section, and an extension section. The trolley section and the transition section are sequentially arranged at the tail of the tunnel boring machine, and the extension section is arranged in the launching shaft and the tunnel and is located at the tail of the transition section. The extension section is arranged to extend along the tunneling direction. Multiple idler roller groups are sequentially arranged on the trolley section, the transition section and the extension section, and the idler roller groups are used to wind the belt; The transition section is equipped with an inclination adjustment mechanism, which is used to reduce the inclination angle of the belt on the transition section when the distance between the trolley section and the extension section increases. The tilt adjustment mechanism includes a support frame, a first drive assembly, and a second drive assembly. The support frame is movably mounted on the transition section, with its head near the tail of the trolley section and its tail near the head of the extension section. Multiple idler roller groups are sequentially mounted on the trolley section, the support frame, and the extension section. The height of the tail of the trolley section is less than the height of the head of the extension section. The first drive assembly is tractively connected to the head of the support frame and is used to drive the head of the support frame to rise and fall. The second drive assembly is tractively connected to the tail of the support frame and is used to drive the tail of the support frame to rise and fall. The first drive assembly and the second drive assembly are used to reduce the tilt angle of the belt on the transition section when the distance between the trolley section and the extension section increases. The first drive assembly and the second drive assembly are also used to reduce the inclination angle of the belt on the transition section when the tunneling direction of the shield equipment is tilted downward; The system further includes a belt storage device, which includes a fixed frame, a movable frame, a plurality of first steering rollers, and a plurality of second steering rollers; wherein the fixed frame is disposed at the tail of the extension section, and the movable frame is slidably disposed relative to the fixed frame along the tunneling direction, the plurality of first steering rollers are spaced apart on the fixed frame, and the plurality of second steering rollers are spaced apart on the movable frame, and the return portion of the belt alternately passes over the plurality of first steering rollers and the plurality of second steering rollers; The system further includes a frequency conversion tensioning device, which is disposed on the side of the moving frame away from the fixed frame, and the tensioning end of the frequency conversion tensioning device is connected to the moving frame. The frequency conversion tensioning device is used to apply a constant force on the moving frame in a direction away from the fixed frame.

2. The shield tunneling starting belt conveyor system according to claim 1, characterized in that, The system also includes: A receiving device, comprising: a sealed receiving hopper, a buffer roller, and multiple anti-overflow skirts; The sealed receiving hopper, the buffer roller, and the anti-overflow skirt are respectively located at the head of the trolley section. The inlet end of the sealed receiving hopper is connected to the outlet end of the tunnel boring machine. The buffer roller is located below the outlet end of the sealed receiving hopper and is used to wind the belt. The anti-overflow skirt is located on both sides of the outlet end of the sealed receiving hopper and is located close to the belt.

3. The shield tunneling starting belt conveyor system according to claim 2, characterized in that, The receiving device further includes: An overflow sensor is provided, with its detection end located on the top inner side of the overflow prevention skirt, and the overflow sensor is used to detect whether slag material overflows from the inner side of the overflow prevention skirt.

4. The shield tunneling starting belt conveyor system according to claim 1, characterized in that, The system also includes: The unloading device includes: a sealed unloading hopper and multiple scrapers; The sealed discharge hopper is located at the tail of the extension section, and the discharge end of the belt is located inside the sealed discharge hopper. The scraper is disposed inside the sealed discharge hopper, and the scraping end of the scraper is close to the belt. Multiple scrapers are distributed at intervals along the running direction of the belt.

5. The shield tunneling starting belt conveyor system according to claim 4, characterized in that, A spraying device is provided between adjacent scrapers, and the spraying end of the spraying device faces the belt.

6. The shield tunneling starting belt conveyor system according to claim 1, characterized in that, The idler assembly includes a trough idler, which is used to wind the belt, and the trough angle of the trough idler is in the range of 45°-60°.

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