Construction method for shield tunnel starting belt conveyor in narrow field

Abstract

The invention provides a narrow site shield tunnel starting belt conveyor construction method which comprises the steps that an unloading machine head is arranged in a starting well, a reversing machine tail is arranged in a rear pilot tunnel, a plurality of carrier roller sets are arranged between the unloading machine head and the reversing machine tail at intervals, and a belt is wound around the unloading machine head, the reversing machine tail and the carrier roller sets. A primary starting belt conveyor is formed; and when the material receiving point of the primary starting belt conveyor moves to the discharging machine head from the reversing machine tail, the primary starting belt conveyor is installed in a reversing mode, so that the reversing machine tail is arranged in the tunneling tunnel, and a secondary starting belt conveyor is formed. According to the construction method for the shield tunnel starting belt conveyor in the narrow and small site, the overall structure is simple, the occupied space is small, and shield starting belt conveying in the narrow and small site is achieved through the arrangement, reversing, extending and other actions of the primary starting belt conveyor and the secondary starting belt conveyor in the rear pilot tunnel, the starting well and the tunneling tunnel.

Description

Technical Field

[0001] The present invention relates to the technical field of belt conveying, and in particular to a construction method of a starting belt conveyor for a shield tunnel in a narrow space. Background Art

[0002] According to the characteristics of shield tunnel construction, the belt conveyor needs to have an extended function, that is, it needs to be equipped with a belt storage device, and then it needs to be equipped with an independent tensioning device, vulcanizing device, belt releasing device, etc. The overall layout distance is long and occupies a large space. However, in the initial stage of the shield tunnel, the construction space is small and it is difficult to arrange a conventional belt conveyor, which seriously affects the normal progress of tunnel construction. Summary of the invention

[0003] The present disclosure aims to solve one of the technical problems in the related art at least to some extent.

[0004] To this end, the purpose of the present disclosure is to provide a construction method for a starting belt conveyor of a shield tunnel in a narrow space.

[0005] To achieve the above-mentioned purpose, the present disclosure provides a method for constructing a starting belt conveyor for a shield tunnel in a narrow space, comprising: arranging a discharge machine head in the starting shaft, arranging a reversing machine tail in the rear guide tunnel, and arranging a plurality of roller groups at intervals between the discharge machine head and the reversing machine tail, and winding belts around the discharge machine head, the reversing machine tail and the plurality of roller groups to form a primary starting belt conveyor; when the material receiving point of the primary starting belt conveyor moves from the reversing machine tail to the discharge machine head, the primary starting belt conveyor is reversibly installed so that the reversing machine tail is arranged in the excavation tunnel and a secondary starting belt conveyor is formed; when the material receiving point of the secondary starting belt conveyor moves from the discharge machine head to the reversing machine tail, the secondary starting belt conveyor is extended until the split starting is completed.

[0006] Optionally, the reversing installation of the primary starting belt conveyor includes: disassembling the primary starting belt conveyor; arranging the unloading machine head in the starting shaft, and arranging the reversing machine tail in the excavation tunnel, and arranging a plurality of the roller groups at intervals between the unloading machine head and the reversing machine tail, and winding the belt around the unloading machine head, the reversing machine tail and the plurality of the roller groups to form a secondary starting belt conveyor.

[0007] Optionally, the reversing installation of the once-starting belt conveyor also includes: arranging a rotating first tensioning roller at the unloading joint, and sliding the first tensioning roller in a vertical direction; bypassing the return portion of the belt around the first tensioning roller, and positioning the first tensioning roller above the return portion of the belt; and providing a weight block on the first tensioning roller so that the first tensioning roller tensions the return portion of the belt.

[0008] Optionally, the reversing installation of the once-starting belt conveyor also includes: arranging a rotating second tensioning roller and a third tensioning roller at the unloading joint, and positioning the first tensioning roller between the second tensioning roller and the third tensioning roller; and positioning the return portion of the belt around the second tensioning roller, the first tensioning roller and the third tensioning roller in sequence, and positioning the second tensioning roller and the third tensioning roller below the return portion of the belt.

[0009] Optionally, extending the secondary starting belt conveyor includes: moving the reversing machine tail along the direction from the starting shaft to the excavation tunnel; adding a plurality of the roller groups between the unloading machine head and the reversing machine tail, and vulcanizing and extending the belt.

[0010] Optionally, the method also includes: arranging a plurality of rotating correcting roller groups and a first driving mechanism for driving the correcting roller groups to rotate between the unloading machine head and the reversing machine tail, and passing the belt around the correcting roller groups, and arranging a plurality of deviation sensors at intervals on the sides of the belt; wherein the first driving mechanism is used to control the rotation of the correcting roller group to a corresponding angle according to the belt deviation detected by the deviation sensor until the belt returns to the center position.

[0011] Optionally, arranging the unloading head in the starting well includes: arranging a sealed unloading hopper in the starting well; arranging a rotating driving roller in the sealed unloading hopper, and arranging a second driving mechanism for driving the driving roller.

[0012] Optionally, arranging the unloading head in the starting well includes: arranging a plurality of scrapers and a plurality of spray devices at intervals in the sealed unloading hopper along the circumference of the driving roller, and making the scraping end of the scraper close to the driving roller, and making the spraying end of the spray device face the driving roller.

[0013] Optionally, the method further includes: arranging at least one speed sensor for detecting the belt speed on the return portion of the belt; and / or arranging at least one longitudinal tear sensor for detecting belt tearing, belt penetration and sharp objects protruding from the belt on the return portion of the belt.

[0014] Optionally, the method further includes: arranging an anti-overflow skirt plate and a flexible plate disposed at the bottom of the anti-overflow skirt plate on both sides of the discharge end of the shield equipment, and placing the flexible plate close to the belt.

[0015] The technical solution provided by the present disclosure may have the following beneficial effects:

[0016] The primary starting belt conveyor and the secondary starting belt conveyor only involve a discharge machine head, a reversing machine tail, multiple roller groups and belts. The overall structure is simple and occupies a small space. In addition, by utilizing the arrangement, reversing, extension and other actions of the primary starting belt conveyor and the secondary starting belt conveyor in the rear guide tunnel, the starting shaft and the excavation tunnel, the belt conveyor for the shield machine to start in a narrow site is realized, thereby ensuring the normal progress of the tunnel construction.

[0017] Additional aspects and advantages of the present disclosure will be given in part in the following description and in part will be obvious from the following description or learned through practice of the present disclosure. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0019] Figure 1 It is a flow chart of a method for constructing a belt conveyor for a shield tunnel in a narrow space proposed in an embodiment of the present disclosure;

[0020] Figure 2 It is a structural schematic diagram of a starting belt conveyor in a construction method of a starting belt conveyor for a shield tunnel in a narrow space proposed in an embodiment of the present disclosure;

[0021] Figure 3 It is a structural schematic diagram of a secondary starting belt conveyor in a method for constructing a starting belt conveyor for a shield tunnel in a narrow space proposed in an embodiment of the present disclosure;

[0022] Figure 4 It is a structural schematic diagram of a heavy hammer block in a construction method of a starting belt conveyor for a shield tunnel in a narrow space proposed in an embodiment of the present disclosure;

[0023] Figure 5 It is a structural schematic diagram of a sealed unloading hopper in a construction method of a starting belt conveyor for a shield tunnel in a narrow space proposed in an embodiment of the present disclosure;

[0024] Figure 6 It is a schematic structural diagram of the anti-overflow skirt plate in the construction method of the starting belt conveyor of a shield tunnel in a narrow space proposed in one embodiment of the present disclosure;

[0025] As shown in the figure: 1. discharge head, 101. sealed discharge hopper, 102. driving roller, 103. second driving mechanism, 104. scraper, 105. spraying device;

[0026] 2. Reversing tail, 3. Roller group, 4. Belt, 5. First tensioning roller, 6. Heavy hammer block, 7. Second tensioning roller, 8. Third tensioning roller, 9. Speed ​​sensor, 10. Longitudinal tearing sensor, 11. Anti-overflow skirt plate, 12. Flexible plate;

[0027] 100, starting shaft, 200, pilot tunnel, 300, tunnelling. DETAILED DESCRIPTION

[0028] Embodiments of the present disclosure are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present disclosure, and are not to be construed as limitations of the present disclosure. On the contrary, the embodiments of the present disclosure include all changes, modifications, and equivalents that fall within the spirit and connotation of the appended claims.

[0029] like Figure 1 , Figure 2 and Figure 3 As shown, the embodiment of the present disclosure proposes a construction method of a starting belt conveyor for a shield tunnel in a narrow space, comprising:

[0030] S1: a discharger head 1 is arranged in the starting shaft 100, a reversing machine tail 2 is arranged in the rear guide tunnel 200, a plurality of roller groups 3 are arranged at intervals between the discharger head 1 and the reversing machine tail 2, and a belt 4 is wound around the discharger head 1, the reversing machine tail 2 and the plurality of roller groups 3 to form a primary starting belt conveyor;

[0031] S2: When the receiving point of the primary starting belt conveyor moves from the reversing machine tail 2 to the discharge machine head 1, the primary starting belt conveyor is reversingly installed so that the reversing machine tail 2 is arranged in the excavation tunnel 300, and a secondary starting belt conveyor is formed;

[0032] S3: When the receiving point of the secondary starting belt conveyor moves from the discharge machine head 1 to the reversing machine tail 2, the secondary starting belt conveyor is extended until the split starting is completed.

[0033] It can be understood that the unloading machine head 1 is arranged in the starting well 100, and the reversing machine tail 2 is arranged in the rear guide tunnel 200, and multiple roller groups 3 are arranged at intervals between the unloading machine head 1 and the reversing machine tail 2, and the belts 4 on the unloading machine head 1, the reversing machine tail 2 and the multiple roller groups 3 are configured, so as to fully utilize the space of the rear guide tunnel 200 to realize a one-time starting belt conveyor for unloading along the rear guide tunnel 200 to the starting well 100;

[0034] Furthermore, as the shield equipment advances, the receiving point of the shield equipment on the primary starting belt conveyor moves along the direction from the reversing machine tail 2 to the discharge machine head 1, until the receiving point of the primary starting belt conveyor moves from the reversing machine tail 2 to the discharge machine head 1, and then the primary starting belt conveyor is reversibly installed, and while the discharge machine head 1 is kept arranged in the starting shaft 100, the reversing machine tail 2 is arranged in the excavation tunnel 300, and at the same time, the coordination of the multiple roller groups 3 between the discharge machine head 1 and the reversing machine tail 2 and the belts 4 on the discharge machine head 1, the reversing machine tail 2 and the multiple roller groups 3 is retained, so that the secondary starting belt conveyor for unloading along the direction from the excavation tunnel 300 to the starting shaft 100 is realized by utilizing the excavation tunnel 300 excavated by the shield equipment;

[0035] The receiving point of the shield equipment on the secondary starting belt conveyor moves along the direction from the discharger head 1 to the reversing machine tail 2 until the receiving point of the secondary starting belt conveyor moves from the discharger head 1 to the reversing machine tail 2, and then the secondary starting belt conveyor is extended. As the shield equipment advances, the extension action is continuously performed, thereby achieving the adaptation of the secondary starting belt conveyor to the position of the shield equipment.

[0036] Among them, the primary starting belt conveyor and the secondary starting belt conveyor only involve the unloading machine head 1, the reversing machine tail 2, multiple roller groups 3 and the belt 4. The overall structure is simple and occupies a small space. In addition, by utilizing the arrangement, reversing, extension and other actions of the primary starting belt conveyor and the secondary starting belt conveyor in the rear guide tunnel 200, the starting shaft 100 and the excavation tunnel 300, the belt 4 transportation started by the shield in a narrow site is realized, thereby ensuring the normal progress of the tunnel construction.

[0037] It should be noted that the primary starting belt conveyor is used for conveying slag when the shield equipment is excavating in the starting shaft 100 .

[0038] The secondary starting belt conveyor is used for conveying slag when the shield equipment is excavating in the excavation tunnel 300. When the secondary starting belt conveyor is extended, it can be called a tertiary starting belt conveyor until the split starting is completed.

[0039] The rear guide tunnel 200 is located on the side of the starting shaft 100 away from the driving tunnel 300, that is, the starting shaft 100 is between the rear guide tunnel 200 and the driving tunnel 300. The primary starting belt conveyor is used to transport the slag of the shield equipment to the starting shaft 100, and the secondary starting belt conveyor is used to transport the slag of the shield equipment to the starting shaft 100.

[0040] The unloading head 1 is used for unloading, and has a driving device for driving the belt 4. The specific type of the unloading head 1 can be set according to actual needs, and there is no limitation on this. The unloading head 1 can be arranged in the starting shaft 100 by using a bracket, and when in the first starting stage, the feeding end of the unloading joint is close to the rear guide tunnel 200, and when in the second starting stage, the feeding end of the unloading joint is close to the excavation tunnel 300.

[0041] The reversing machine tail 2 is used for reversing the belt 4. The specific type of the reversing machine tail 2 can be set according to actual needs and is not limited to this. For example, the reversing machine tail 2 can be a rotatably arranged roller, and when it is a primary starting stage, the reversing machine tail 2 can be arranged in the rear guide tunnel 200 using a bracket. When it is a secondary starting stage, the reversing machine tail 2 can be arranged in the excavation tunnel 300 using a bracket.

[0042] The roller group 3 is used to support and guide the belt 4. The specific type of the roller group 3 can be set according to actual needs and is not limited to this. For example, the roller group 3 includes: an upper roller group for supporting and guiding the feeding part (upper part) of the belt 4, a lower roller group for supporting and guiding the return part (lower part) of the belt 4, and a crossbeam, a longitudinal beam, etc. that support the upper roller group and the lower roller group.

[0043] The belt 4 is used to transport slag materials. The specific type of the belt 4 can be set according to actual needs and is not limited to this.

[0044] Compared with the traditional tunnel starting belt conveyor, the first starting belt conveyor and the second starting belt conveyor of this embodiment have cancelled the belt storage device, and the first starting belt conveyor has formed a fixed belt conveyor, and the second starting belt conveyor has formed a fixed extended belt conveyor, thereby effectively solving the space limitation of shield starting in a narrow site and having a high degree of adaptability.

[0045] like Figure 2 and Figure 3 As shown, in some embodiments, reversing the primary belt conveyor installation includes:

[0046] Dismantle the primary conveyor belt;

[0047] A discharge machine head 1 is arranged in the starting shaft 100, and a reversing machine tail 2 is arranged in the excavation tunnel 300, and a plurality of roller groups 3 are arranged at intervals between the discharge machine head 1 and the reversing machine tail 2, and a belt 4 is wound around the discharge machine head 1, the reversing machine tail 2 and the plurality of roller groups 3 to form a secondary starting belt conveyor.

[0048] It can be understood that after the material receiving point of the primary starting belt conveyor moves from the reversing machine tail 2 to the unloading machine head 1, the primary starting belt conveyor is disassembled, and the unloading machine head 1 is arranged in the starting shaft 100, and the reversing machine tail 2 is arranged in the excavation tunnel 300. At the same time, multiple roller groups 3 are arranged at intervals between the unloading machine head 1 and the reversing machine tail 2, and the belts 4 on the unloading machine head 1, the reversing machine tail 2 and the multiple roller groups 3 are configured, thereby realizing the reversing installation of the primary starting belt conveyor. While keeping the unloading machine head 1 arranged in the starting shaft 100, the reversing machine tail 2 is arranged in the excavation tunnel 300. Thus, the secondary starting belt conveyor that unloads along the excavation tunnel 300 to the starting shaft 100 is realized by using the excavation tunnel 300 excavated by the shield equipment.

[0049] It should be noted that, except for slight differences in layout length, number of parts, etc., the other structures (unloader head 1, reversing tail 2, roller group 3, belt 4, etc.) of the primary and secondary starting belt conveyors are the same. Therefore, the reversing installation from the primary starting belt conveyor to the secondary starting belt conveyor is simple and easy to implement.

[0050] like Figure 4 As shown, in some embodiments, reversing the installation of a primary belt conveyor further comprises:

[0051] A rotating first tensioning roller 5 is arranged at the discharge joint, and the first tensioning roller 5 is slidably arranged in the vertical direction;

[0052] The return portion of the belt 4 is passed around the first tensioning roller 5, and the first tensioning roller 5 is located above the return portion of the belt 4;

[0053] A weight block 6 is arranged on the first tensioning drum 5 so that the first tensioning drum 5 tensions the return portion of the belt 4 .

[0054] It can be understood that a rotating first tensioning roller 5 is arranged at the unloading joint, and the first tensioning roller 5 is slidably arranged in the vertical direction, so that the first tensioning roller 5 can freely slide in the vertical direction while rotating around the central axis; the return part of the belt 4 is bypassed around the first tensioning roller 5, and the first tensioning roller 5 is located above the return part of the belt 4, so that the first tensioning roller 5 can guide the belt 4 while also achieving tensioning of the return part of the belt 4 by downward movement; a weight block 6 is provided on the first tensioning roller 5, so that the gravity of the weight block 6 is utilized to move the first tensioning roller 5 downward to the extreme position.

[0055] Therefore, through the arrangement of the first tensioning roller 5 and the weight block 6, the belt 4 in the secondary starting belt conveyor is tensioned, so that the secondary starting belt conveyor can be arranged in a larger length while ensuring the stable transportation of the slag by the belt 4.

[0056] It should be noted that compared with the tensioning device in the traditional tunnel starting belt conveyor, the weight tensioning device composed of the first tensioning roller 5 and the weight block 6 in this embodiment occupies extremely small space as a whole, so that the secondary starting belt conveyor can adapt to the narrow space where the shield starts, thereby ensuring efficient shield construction in the tunnel.

[0057] The first tensioning roller 5 is used for guiding the belt 4 and tensioning the belt 4. The specific type of the first tensioning roller 5 can be set according to actual needs and is not limited to this. For example, the first tensioning roller 5 is a roller structure and is rotatably arranged on a support, and the support is slidably arranged on the bracket of the discharger head 1 along the vertical direction.

[0058] The weight block 6 is used to increase the gravity of the first tensioning roller 5 so as to utilize gravity to tension the belt 4. The specific type of the weight block 6 can be set according to actual needs and is not limited to this. For example, the weight block 6 can be slidably set on the bracket of the unloading head 1 and connected to the support of the first tensioning roller 5.

[0059] like Figure 4 As shown, in some embodiments, reversing the installation of a primary belt conveyor further comprises:

[0060] A rotating second tensioning roller 7 and a third tensioning roller 8 are arranged at the discharge joint, and the first tensioning roller 5 is located between the second tensioning roller 7 and the third tensioning roller 8;

[0061] The return portion of the belt 4 is passed around the second tensioning roller 7 , the first tensioning roller 5 and the third tensioning roller 8 in sequence, and the second tensioning roller 7 and the third tensioning roller 8 are located below the return portion of the belt 4 .

[0062] It can be understood that a rotating second tensioning roller 7 and a third tensioning roller 8 are arranged at the unloading joint, and the first tensioning roller 5 is located between the second tensioning roller 7 and the third tensioning roller 8, and the return portion of the belt 4 is passed around the second tensioning roller 7, the first tensioning roller 5 and the third tensioning roller 8 in sequence, and the second tensioning roller 7 and the third tensioning roller 8 are located below the return portion of the belt 4, so that the second tensioning roller 7 and the third tensioning roller 8 can support the return portion of the belt 4 on both sides of the first tensioning roller 5, thereby ensuring stable tensioning of the return portion of the belt 4 by the first tensioning roller 5, and effectively reducing the tensioning stroke of the first tensioning roller 5.

[0063] It should be noted that the second tensioning roller 7 and the third tensioning roller 8 are used to support the return part of the belt 4 on both sides of the first tensioning roller 5. The specific types of the second tensioning roller 7 and the third tensioning roller 8 can be set according to actual needs and are not limited to this. For example, the second tensioning roller 7 and the third tensioning roller 8 are both roller structures and are rotatably arranged on the bracket of the unloading head 1.

[0064] In some embodiments, extending the secondary originating belt conveyor includes:

[0065] Move the reversing machine tail 2 in the direction from the starting shaft 100 to the excavation tunnel 300;

[0066] A plurality of roller groups 3 are added between the discharge machine head 1 and the reversing machine tail 2, and a vulcanized extension belt 4 is provided.

[0067] It can be understood that the reversing machine tail 2 is moved in the direction from the starting shaft 100 to the excavation tunnel 300 to leave an extension space for the secondary starting belt conveyor between the unloading machine head 1 and the reversing machine tail 2, and then a plurality of roller groups 3 are added between the unloading machine head 1 and the reversing machine tail 2, and the belt 4 is vulcanized and extended, thereby realizing the extension operation of the secondary starting belt conveyor, and then realizing the adaptation of the secondary starting belt conveyor to the position of the shield equipment.

[0068] It should be noted that when the receiving point of the secondary starting belt conveyor moves from the unloading head 1 to the reversing tail 2, the shield equipment cannot continue to use the secondary starting belt conveyor to transport materials. After adding multiple roller groups 3 between the unloading head 1 and the reversing tail 2 and vulcanizing the extension belt 4, the secondary starting belt conveyor is extended, so that the shield equipment can continue to unload materials between the original reversing tail 2 position to the current reversing tail 2 position.

[0069] The vulcanization of the belt 4 can utilize a vulcanization device. Specifically, when extending the secondary starting belt conveyor, part of the roller group 3 is removed and a vulcanization device is installed, so that the vulcanization device can be used to vulcanize the extended belt 4, and after extending the belt 4, the vulcanization device is removed and the roller group 3 is restored. In this way, the space occupation of the vulcanization device is avoided, and the adaptability of the secondary starting belt conveyor to the narrow space of the shield starting is ensured.

[0070] In some embodiments, the method further comprises:

[0071] A plurality of rotating deviation correction roller groups 3 and a first driving mechanism for driving the deviation correction roller groups 3 to rotate are arranged at intervals between the discharge head 1 and the reversing tail 2, and the belt 4 is passed around the deviation correction roller groups 3, and a plurality of deviation sensors are arranged at intervals on the side of the belt 4;

[0072] The first driving mechanism is used to control the deviation-correcting roller group 3 to rotate to a corresponding angle according to the deviation of the belt 4 detected by the deviation sensor, until the belt 4 returns to the center position.

[0073] It can be understood that a deviation correction roller group 3, a first drive mechanism and a deviation sensor are arranged between the unloading head 1 and the reversing tail 2, so that the first drive mechanism can control the deviation correction roller group 3 to rotate to a corresponding angle according to the deviation of the belt 4 detected by the deviation sensor, thereby guiding the belt 4 to return to the center position, thereby realizing automatic deviation correction of the belt 4, thereby ensuring that when the shield equipment vibrates or adjusts its posture, the belt 4 still maintains stable operation to avoid deviation and slag leakage.

[0074] It should be noted that the deviation correction roller group 3 is used to rotate under the drive of the first drive mechanism, so as to guide the belt 4 to return to the center position. The specific type of the deviation correction roller group 3 can be set according to actual needs and is not limited to this. By way of example, the deviation correction roller group 3 includes: a rotating seat and two rollers arranged on the rotating seat and spaced apart, and the rotation center axis of the rotating seat is located in the vertical direction.

[0075] The first driving mechanism is used to drive the deviation correction roller group 3 to rotate, so as to use the rotating deviation correction roller group 3 to guide the belt 4 to return to the center position. The specific type of the first driving mechanism can be set according to actual needs and is not limited to this. For example, the first driving mechanism can be an electric cylinder, which is hinged between the bracket and the rotating seat.

[0076] The deviation sensor is used to detect the deviation of the belt 4 relative to the center position. The specific type of the deviation sensor can be set according to actual needs and is not limited to this.

[0077] When the belt 4 deviates in one direction, the first driving mechanism drives the deviation-correcting roller set 3 to rotate in the opposite direction and guide the belt 4 .

[0078] like Figure 4 and Figure 5 As shown, in some embodiments, arranging the unloader head 1 in the launch well 100 includes:

[0079] A sealed discharge hopper 101 is arranged in the starting well 100;

[0080] A rotating driving roller 102 and a second driving mechanism 103 for driving the driving roller 102 are arranged in the sealed discharge hopper 101 .

[0081] It can be understood that a sealed unloading hopper 101 is arranged in the starting shaft 100, a rotating driving roller 102 is arranged in the sealed unloading hopper 101, and a second driving mechanism 103 for driving the driving roller 102 is arranged, so that when the belt 4 bypasses the driving roller 102, the sealing structure of the sealed unloading hopper 101 and the drive of the second driving mechanism 103 can be utilized to achieve sealed unloading of the slag, thereby reducing leakage and improving the conveying quality and efficiency of the belt 4.

[0082] It should be noted that the sealed unloading hopper 101 is used to form a relatively closed discharge space at the discharge end of the belt 4 (at the driving roller 102). The specific type of the sealed unloading hopper 101 can be set according to actual needs and is not limited to this. For example, the sealed unloading hopper 101 can be a closed bucket-shaped structure, and the top or side of the bucket-shaped structure is provided with a feed port for accommodating the discharge end of the belt 4, and flexible sealing members are provided around the feed port, and a discharge port for discharging is provided at the bottom of the bucket-shaped structure.

[0083] The driving roller 102 is used to rotate under the drive of the second driving mechanism 103 to drive the belt 4 to run. The specific type of the driving roller 102 can be set according to actual needs and is not limited to this. For example, the driving roller 102 is a roller structure and is rotatably set in the sealed discharge hopper 101. The rotating shaft of the driving roller 102 extends out of the sealed discharge hopper 101 and is transmission-connected to the second driving mechanism 103.

[0084] The second driving mechanism 103 is used to drive the driving roller 102 to rotate, so as to utilize the rotation of the driving roller 102 to drive the belt 4 to run. The specific type of the second driving mechanism 103 can be set according to actual needs and is not limited to this. For example, the second driving mechanism 103 can be a motor and a reducer, and the motor is connected to the driving roller 102 through the reducer.

[0085] like Figure 5 As shown, in some embodiments, arranging the unloader head 1 in the launch well 100 includes:

[0086] A plurality of scrapers 104 and a plurality of spray devices 105 are arranged at intervals in the sealed discharge hopper 101 along the circumference of the driving roller 102 , with the scraping end of the scraper 104 close to the driving roller 102 , and the spraying end of the spray device 105 facing the driving roller 102 .

[0087] It can be understood that a plurality of scrapers 104 and a plurality of spray devices 105 are arranged at intervals in the sealed discharge hopper 101 along the circumference of the driving roller 102, and the scraping end of the scraper 104 is close to the driving roller 102, and the spraying end of the spray device 105 is directed toward the driving roller 102. The cooperation of the plurality of scrapers 104 and the plurality of spray devices 105 can be utilized to effectively remove slag, debris, etc. attached to the belt 4, thereby ensuring the efficient operation of the belt 4.

[0088] It should be noted that the scraper 104 is used to scrape off slag, debris, etc. on the belt 4. The specific type of the scraper 104 can be set according to actual needs and is not limited to this. For example, the scraper 104 can be an alloy scraper 104.

[0089] The spray device 105 cooperates with the scraper 104 to remove the slag, debris, etc. attached to the belt 4. The specific type of the spray device 105 can be set according to actual needs and is not limited to this. For example, the spray device 105 uses the cooperation of the pump body and the nozzle to pressurize the clean water source in the field and spray it on the belt 4. At the same time, the automatic operation of the spray is realized by the opening and closing of the valve body, etc. Each spray device 105 has a scraper 104 on both sides.

[0090] like Figure 2 As shown, in some embodiments, the method further comprises: arranging at least one speed sensor 9 for detecting the speed of the belt 4 on the return portion of the belt 4 .

[0091] It is understandable that at least one speed sensor 9 is arranged on the return portion of the belt 4 so that the speed of the belt 4 can be obtained using the speed sensor 9, thereby facilitating the monitoring of the conveying of the belt 4 based on the obtained speed of the belt 4.

[0092] It should be noted that the speed sensor 9 is used to detect the speed of the belt 4 , and the specific type of the speed sensor 9 can be set according to actual needs, and there is no limitation on this.

[0093] like Figure 2 As shown, in some embodiments, at least one longitudinal tear sensor 10 is arranged on the return portion of the belt 4 for detecting tearing of the belt 4 , puncture of the belt 4 , and protrusion of sharp objects from the belt 4 .

[0094] It is understandable that at least one longitudinal tear sensor 10 is arranged on the return portion of the belt 4, so that the damage state of the belt 4 can be obtained using the longitudinal tear sensor 10, thereby facilitating the monitoring of the belt 4 conveying according to the obtained damage state of the belt 4.

[0095] It should be noted that the longitudinal tear sensor 10 is used to detect the tearing of the belt 4, the puncture of the belt 4 and the protrusion of sharp objects from the belt 4. The specific type of the longitudinal tear sensor 10 can be set according to actual needs and is not limited to this.

[0096] For the belt conveyor of this embodiment, an intelligent control system can also be arranged. Specifically, the equipment can be interconnected with the main control room and exchange data. The belt conveyor and various devices can be operated and monitored in the shield operation room. The belt conveyor monitoring system can display: the working status of the belt conveyor, speed, belt 4 deviation warning, belt 4 tear warning, drive working status, motor temperature, reducer temperature, fault display, etc.

[0097] like Figure 6 As shown, in some embodiments, the method further includes:

[0098] Anti-overflow skirt plates 11 and flexible plates 12 arranged at the bottom of the anti-overflow skirt plates 11 are arranged on both sides of the discharge end of the shield equipment, and the flexible plates 12 are placed close to the belt 4.

[0099] It can be understood that an anti-overflow skirt 11 and a flexible plate 12 arranged at the bottom of the anti-overflow skirt 11 are arranged on both sides of the discharge end of the shield equipment, and the flexible plate 12 is placed close to the belt 4, so that a sealed and flexible transition structure is formed at the receiving point of the belt 4 by utilizing the arrangement of the anti-overflow skirt 11 and the flexible plate 12, and then the transition structure is utilized to reduce the risk of leakage of slag materials, thereby ensuring high-quality and efficient material transportation of the belt 4.

[0100] It should be noted that the anti-overflow skirt plate 11 and the flexible plate 12 are used to form limit positions on both sides of the material receiving point of the belt 4 to reduce the overflow of slag. The specific types of the anti-overflow skirt plate 11 and the flexible plate 12 can be set according to actual needs and are not limited to this. For example, the anti-overflow skirt plate 11 is an inclined plate structure, and the flexible plate 12 is made of rubber material and is arranged at the bottom of the anti-overflow skirt plate 11. At the same time, the flexible plate 12 is arranged close to the belt 4 and does not affect the operation of the belt 4.

[0101] In the description of the present disclosure, the terms "first", "second", etc. are used for descriptive purposes only and cannot be understood as indicating or implying relative importance. In addition, in the description of the present disclosure, unless otherwise specified, "plurality" means two or more.

[0102] Any process or method description in a flowchart or otherwise described herein may be understood to represent a module, segment or portion of code that includes one or more executable instructions for implementing the steps of a specific logical function or process, and the scope of the preferred embodiments of the present disclosure includes alternative implementations in which functions may not be performed in the order shown or discussed, including performing functions in a substantially simultaneous manner or in the reverse order depending on the functions involved, which should be understood by those skilled in the art to which the embodiments of the present disclosure belong.

[0103] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present disclosure. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0104] Although the embodiments of the present disclosure have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present disclosure. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present disclosure.

Claims

1. A construction method for a belt conveyor starting from a shield tunnel in a narrow space, characterized in that: include: A discharge machine head is arranged in the starting shaft, and a reversing machine tail is arranged in the rear guide tunnel, and a plurality of roller groups are arranged at intervals between the discharge machine head and the reversing machine tail, and a belt is wound around the discharge machine head, the reversing machine tail and the plurality of roller groups to form a primary starting belt conveyor; When the material receiving point of the primary starting belt conveyor moves from the tail of the reversing machine to the head of the unloading machine, the primary starting belt conveyor is reversibly installed so that the tail of the reversing machine is arranged in the excavation tunnel and forms a secondary starting belt conveyor; When the material receiving point of the secondary starting belt conveyor moves from the head of the discharge machine to the tail of the reversing machine, the secondary starting belt conveyor is extended until the split starting is completed.

2. The method for constructing a shield tunnel starting belt conveyor in a narrow space according to claim 1, characterized in that: The reversing installation of the primary starting belt conveyor comprises: Disassembling the primary starting belt conveyor; The unloading machine head is arranged in the starting shaft, and the reversing machine tail is arranged in the excavation tunnel, and a plurality of the roller groups are arranged at intervals between the unloading machine head and the reversing machine tail, and the belt is wound around the unloading machine head, the reversing machine tail and a plurality of the roller groups to form a secondary starting belt conveyor.

3. The method for constructing a belt conveyor for a shield tunnel in a narrow space according to claim 2, characterized in that: The reversing installation of the primary starting belt conveyor also includes: A rotating first tensioning roller is arranged at the discharge joint, and the first tensioning roller is slidably arranged in a vertical direction; Pass the return portion of the belt around the first tensioning roller, and make the first tensioning roller be located above the return portion of the belt; A weight block is arranged on the first tensioning roller so that the first tensioning roller tensions the return portion of the belt.

4. The method for constructing a belt conveyor for a shield tunnel in a narrow space according to claim 3, characterized in that: The reversing installation of the primary starting belt conveyor also includes: Arrange a rotating second tensioning roller and a third tensioning roller at the discharge joint, and make the first tensioning roller located between the second tensioning roller and the third tensioning roller; The return portion of the belt is passed around the second tensioning roller, the first tensioning roller and the third tensioning roller in sequence, and the second tensioning roller and the third tensioning roller are located below the return portion of the belt.

5. The method for constructing a shield tunnel starting belt conveyor in a narrow space according to claim 1, characterized in that: The extending of the secondary originating belt conveyor comprises: Moving the reversing machine tail in the direction from the starting shaft to the excavation tunnel; A plurality of roller groups are added between the discharge machine head and the reversing machine tail, and the belt is vulcanized to extend the belt.

6. The method for constructing a shield tunnel starting belt conveyor in a narrow space according to claim 1, characterized in that: The method further comprises: A plurality of rotating deviation correction roller groups and a first driving mechanism for driving the deviation correction roller groups to rotate are arranged at intervals between the discharge head and the reversing tail, and the belt is passed around the deviation correction roller groups, and a plurality of deviation sensors are arranged at intervals on the side of the belt; Wherein, the first driving mechanism is used to control the deviation-correcting roller group to rotate a corresponding angle according to the belt deviation detected by the deviation sensor until the belt returns to the center position.

7. The method for constructing a starting belt conveyor for a shield tunnel in a narrow space according to claim 1, characterized in that: The method of arranging a discharger head in the launching well comprises: Arranging a sealed discharge hopper in the launching well; A rotating driving roller is arranged in the sealed discharge hopper, and a second driving mechanism for driving the driving roller is arranged.

8. The method for constructing a starting belt conveyor for a shield tunnel in a narrow space according to claim 1, characterized in that: The method of arranging a discharger head in the launching well comprises: A plurality of scrapers and a plurality of spray devices are arranged at intervals in the sealed discharge hopper along the circumference of the drive roller, and the scraping end of the scraper is close to the drive roller, and the spraying end of the spray device is directed toward the drive roller.

9. The method for constructing a shield tunnel starting belt conveyor in a narrow space according to claim 1, characterized in that: The method further comprises: Arrange at least one speed sensor for detecting the speed of the belt on the return portion of the belt; and / or, At least one longitudinal tear sensor for detecting tearing of the belt, puncture of the belt and protrusion of a sharp object from the belt is arranged on the return portion of the belt.

10. The method for constructing a shield tunnel starting belt conveyor in a narrow space according to claim 1, characterized in that: The method further comprises: Anti-overflow skirt plates and flexible plates arranged at the bottom of the anti-overflow skirt plates are arranged on both sides of the discharging end of the shield equipment, and the flexible plates are placed close to the belt.

Images