Inclined shaft tunnel boring machine and its protection device

Abstract

The present application relates to the field of trenchless underground engineering equipment, in particular to a kind of inclined shaft tunnel boring machine and its protective device.The protective device of inclined shaft tunnel boring machine includes the connecting portion for being connected with the drive box of boring machine and the shielding portion for blocking the falling object and the staff in drive box, and the connecting portion is located at the circumferential outer edge of shielding portion.The present application is based on the invention concept of "blocking falling object", and proposes a protective device for improving inclined shaft tunnel boring machine, which can be fixedly connected with drive box through connecting portion, and forms a canopy structure outside the central hole of drive box by shielding portion using the posture of boring machine inclined excavation, so as to block between falling object and staff in drive box, prevent falling object from hurting people, thereby solving the problem of threatening the safety of operating personnel caused by the falling slag of cutter body into the slag inlet of existing inclined shaft boring machine, and achieving the effects of safe and smooth construction and improving construction efficiency.

Description

Technical Field

[0001] This invention relates to the field of trenchless underground engineering equipment, and in particular to an inclined shaft tunnel boring machine and its protective device. Background Technology

[0002] Inclined shaft tunnel boring machines (TBMs) have demonstrated significant advantages in pumped storage power stations and coal mine construction due to their high tunneling efficiency and safety factor. Based on this development trend, the applicant has conducted research on inclined shaft TBMs and achieved substantial breakthroughs. For example, the applicant's Chinese utility model patent with authorization announcement number CN214062959U and authorization announcement date of August 27, 2021, provides a cutterhead, cutter transport fixture, and TBM for inclined shaft tunneling.

[0003] The aforementioned tunneling machine includes a shield body 1001, a cutterhead 1002, a main drive, and a muck removal system. The cutterhead includes a cutterhead body, which comprises an outer ring and a cutterhead panel. The cutterhead panel is welded to the outer ring. A muck inlet and a corresponding scraping mechanism are located at the edge of the cutterhead body. The outer ring is connected to a cutterhead flange via multiple support beams, and the cutterhead flange is used for fixed connection to the main drive. The main drive includes a drive housing 1003, a power unit (e.g., a motor), and support bearings. The drive housing 1003 is an annular housing, and its inner bore forms a maintenance passage for operators, allowing for cutterhead replacement and other operations during construction.

[0004] In practice, the aforementioned tunneling machine has achieved good results in inclined shaft excavation. However, due to the upward inclined excavation, as... Figure 1 As shown, at the slag inlet of the working face 1004, the slag and rock will inevitably fall to the center of the main drive, posing a significant threat to the personal safety of the operators. Summary of the Invention

[0005] The purpose of this invention is to provide a protective device for inclined shaft tunnel boring machines to solve the problem of operator safety threats caused by slag falling from the cutterhead body's inlet in existing inclined shaft tunnel boring machines.

[0006] Meanwhile, the present invention also aims to provide an inclined shaft tunnel boring machine using the above-mentioned protective device, so as to solve the problem of threatening the safety of operators caused by the falling of slag from the cutterhead body inlet of existing inclined shaft tunnel boring machines.

[0007] To solve the above problems, the protective device for the inclined shaft tunnel boring machine of the present invention adopts the following technical solution: a protective device for the inclined shaft tunnel boring machine, the protective device including a connecting part for connecting to the drive box of the boring machine and a shielding part for blocking falling objects and personnel inside the drive box, wherein the connecting part is located at the circumferential outer edge of the shielding part.

[0008] Beneficial Effects: Based on the inventive concept of "blocking falling objects," this invention proposes a protective device that can be used to improve existing inclined shaft tunnel boring machines. This protective device can be fixedly connected to the drive box via a connecting part. Then, by utilizing the inclined tunneling posture of the tunnel boring machine, a canopy structure is formed on the outside (front side) of the central hole of the drive box through the shielding part, thereby blocking falling objects from the workers inside the drive box and preventing injuries from falling objects. This solves the problem of threatening the safety of operators caused by falling debris from the cutterhead body's inlet of existing inclined shaft tunnel boring machines, achieving the effects of safe and smooth construction and improved construction efficiency.

[0009] Furthermore, the protective device includes a fixed shield, with the connecting portion located on the outer periphery of the fixed shield, and an access door provided on the fixed shield. This invention, by designing the protective device as a fixed shield + access door structure, achieves both protection and convenient access for operators.

[0010] Furthermore, the inspection door is a sliding door. Sliding doors have the advantage of taking up little space when opened, making them easy to arrange.

[0011] Furthermore, the sliding door is equipped with an upper track and a lower track, with a detachable section between the two ends of the lower track. The detachable section can be used to discharge debris from the track, facilitating track cleaning.

[0012] Furthermore, the detachable section is located at the rear end of the sliding door when it is in the closed position. This location of the detachable section allows for easy clearing of any jamming points when the sliding door becomes stuck, increasing the reliability of the sliding door.

[0013] Furthermore, the maintenance door is equipped with a door drive device, which is connected to the maintenance door in a driving connection. The door drive device facilitates opening and closing the door, reducing the workload of workers and improving the efficiency of opening and closing the door.

[0014] Furthermore, the door drive device is a drive cylinder. Drive cylinders have the advantages of low cost and easy placement.

[0015] Furthermore, the connecting portion includes a rearwardly extending support body located behind the fixed shield, with a connecting flange at the rear end of the support body for connection with the drive housing. During use, the support body can "penetrate" into the drive housing, thereby facilitating connection.

[0016] Furthermore, the supports are distributed on the same circumference. Supports distributed on the same circumference have the advantages of uniform stress distribution and high reliability.

[0017] The inclined shaft tunnel boring machine of the present invention adopts the following technical solution:

[0018] An inclined shaft tunnel boring machine includes a drive box with a maintenance passage at its center. A protective device is provided on the drive box, which includes a connecting part for connecting to the drive box of the tunnel boring machine and a shielding part for blocking falling objects from personnel inside the drive box. The connecting part is located at the circumferential outer edge of the shielding part.

[0019] Beneficial Effects: Based on the inventive concept of "blocking falling objects," this invention proposes a technical solution for installing a protective device on existing inclined shaft tunnel boring machines. The protective device can be fixedly connected to the drive box via a connecting part. Then, utilizing the inclined tunneling posture of the tunnel boring machine, a canopy structure is formed on the outside (front side) of the central hole of the drive box through the shielding part, thereby blocking falling objects from the workers inside the drive box and preventing injuries from falling objects. This solves the problem of threatening the safety of operators caused by falling debris from the cutterhead body's inlet of existing inclined shaft tunnel boring machines, achieving the effects of safe and smooth construction and improved construction efficiency.

[0020] Furthermore, the protective device includes a fixed shield, with the connecting portion located on the outer periphery of the fixed shield, and an access door provided on the fixed shield. This invention, by designing the protective device as a fixed shield + access door structure, achieves both protection and convenient access for operators.

[0021] Furthermore, the inspection door is a sliding door. Sliding doors have the advantage of taking up little space when opened, making them easy to arrange.

[0022] Furthermore, the sliding door is equipped with an upper track and a lower track, with a detachable section between the two ends of the lower track. The detachable section can be used to discharge debris from the track, facilitating track cleaning.

[0023] Furthermore, the detachable section is located at the rear end of the sliding door when it is in the closed position. This location of the detachable section allows for easy clearing of any jamming points when the sliding door becomes stuck, increasing the reliability of the sliding door.

[0024] Furthermore, the maintenance door is equipped with a door drive device, which is connected to the maintenance door in a driving connection. The door drive device facilitates opening and closing the door, reducing the workload of workers and improving the efficiency of opening and closing the door.

[0025] Furthermore, the door drive device is a drive cylinder. Drive cylinders have the advantages of low cost and easy placement.

[0026] Furthermore, the connecting portion includes a rearwardly extending support body located behind the fixed shield, with a connecting flange at the rear end of the support body for connection with the drive housing. During use, the support body can "penetrate" into the drive housing, thereby facilitating connection.

[0027] Furthermore, the supports are distributed on the same circumference. Supports distributed on the same circumference have the advantages of uniform stress distribution and high reliability. Attached Figure Description

[0028] Figure 1 This is a structural schematic diagram of an existing inclined shaft tunnel boring machine;

[0029] Figure 2 This is a schematic diagram of the structure of Embodiment 1 (closed state) of the protective device for the inclined shaft tunnel boring machine of the present invention;

[0030] Figure 3 yes Figure 2 AA section view;

[0031] Figure 4 yes Figure 2 CC section view;

[0032] Figure 5 yes Figure 1 A schematic diagram of the structure of the fixed shielding component in the diagram;

[0033] Figure 6 yes Figure 5 DD sectional view;

[0034] Figure 7 yes Figure 5 BB section view;

[0035] Figure 8 This is a structural diagram of a sliding door;

[0036] Figure 9 This is a schematic diagram of the structure of Embodiment 1 of the protective device for the inclined shaft tunnel boring machine of the present invention (open state);

[0037] Figure 10 This is a schematic diagram of the usage state of Embodiment 1 of the protective device of the inclined shaft tunnel boring machine of the present invention, and also a structural schematic diagram of an embodiment of the inclined shaft tunnel boring machine of the present invention.

[0038] Figure 1 In the middle: 1001, shield body; 1002, cutterhead; 1003, drive box; 1004, working face.

[0039] Figure 2-10In the middle section: 101. Connecting part; 11. Support body; 12. Connecting flange; 13. Inner stiffening plate; 14. Outer stiffening plate; 102. Covering part; 21. Fixed covering part; 22. Inspection port; 23. Upper track; 24. Lower track; 241. Detachable section; 25. Side track; 26. Sliding door; 27. Fixed hinge seat; 28. Front ear seat; 29. ​​Fork head; 210. Rear ear seat; 211. Pin shaft; 212. Blade type fixed seat; 213. Stop pin; 214. Door hinge seat; 215. Door drive device; 103. Drive box; 104. Dropped object; 105. Worker; 106. Cutter head; 107. Working face. Detailed Implementation

[0040] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only for explaining the invention and are not intended to limit the invention; that is, the described embodiments are merely some embodiments of the invention, not all embodiments. The components of the embodiments of the invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0041] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0042] The features and performance of the present invention will be further described in detail below with reference to embodiments.

[0043] Embodiment 1 of the protective device for the inclined shaft tunnel boring machine of the present invention:

[0044] like Figure 2-10 As shown, the device includes a connecting part 101 and a shielding part 102. The connecting part 101 is used to connect the device to the tunneling machine drive box 103, and the shielding part 102 is used to block falling objects 104 from hitting the workers 105 inside the drive box 103, preventing the workers 105 from being injured.

[0045] The connecting portion 101 is located at the outer edge of the shielding portion 102, that is, near the outer edge. The structure of the shielding portion 102 is shown below. Figure 2-9 This includes a fixed shield 21 and an access door. The structure of the fixed shield 21 is as follows: Figure 5-7 As shown, the whole is disc-shaped, and the size of the disc is preferably large enough to completely cover the center hole of the drive box 103. An inspection port 22 is provided on the fixed cover 21, which allows personnel and materials to enter and exit for operations such as tool changing.

[0046] An upper track 23, a lower track 24, and a side track 25 are provided on the fixed shield 21. The upper track 23 is located above the access port 22 and is detachably fixed to the fixed shield 21 by screws. Most of the lower track 24 is welded to the fixed shield 21 to ensure connection strength. One section of the lower track 24 is designed to be detachably fixed by screws, forming a detachable section 241. In this embodiment, the detachable section 241 is located at the rear end of the sliding door 26 (access door) configured for the access port 22 when it is in the closed position. When foreign objects are found to have entered the lower track 24, they can be quickly discharged by disassembling the detachable section 241. The side track 26 is installed on one side edge of the access port 22 to limit the movement of the sliding door 26 and achieve the closing positioning of the sliding door 26. A fixed hinge seat 27 is provided on the side of the access port 22 opposite to the side guide rail 25.

[0047] The access door is a sliding door 26, and its structure is as follows: Figure 8 As shown, the front end of the sliding door 26 in the closing direction is provided with a front ear seat 28 and a fork head 29, with two of each and spaced apart. The rear end of the sliding door 264 is provided with a rear ear seat 210, which is arranged correspondingly to the front ear seat 28. Through holes are provided on the front and rear ear seats. When the sliding door 26 is closed, a pin 211 can be inserted into the through hole to prevent the sliding door 26 from moving, ensuring its reliable operation. In addition, a knife-shaped fixing seat 212 corresponding to the fork head 29 is provided on the fixed blocking member 21. When the sliding door 26 is closed in place, the knife-shaped fixing seat 212 will engage with the fork head 29 on the sliding door 26. At this time, by inserting a stop pin 213 into the knife-shaped fixing seat 212, the sliding door can be prevented from sagging when the tunneling machine tilts during tunneling. In addition to the aforementioned components, a door hinge seat 214 is also provided on the sliding door 26. The door hinge seat 214 is located on the front side of the sliding door 26 in the closing direction, that is, on the side close to the side guide rail 25.

[0048] The maintenance door is equipped with a door drive device 215, which is connected to the maintenance door for driving the opening and closing of the maintenance door. In this embodiment, the door drive device 215 is specifically a drive cylinder, or more specifically a hydraulic cylinder. One end of the cylinder is connected to the fixed hinge seat 27 on the fixed blocking member 21, and the other end is connected to the door hinge seat 214 on the sliding door 26. By extending and retracting, the sliding door 26 can be driven to complete the opening and closing action.

[0049] like Figure 2-4As shown, the connecting structure 101 includes a support body 11 fixed to the fixed shield 21. The support body 11 extends from front to back. In this embodiment, the support body 11 is tile-shaped, specifically composed of various support pieces distributed on the same cylindrical body. This facilitates both weight reduction and tool operation. For example, tools such as wrenches can be inserted through the gaps between the support pieces for tool assembly and disassembly. A connecting flange 12 is provided at the end of the support body 11 away from the fixed shield, which is used for fixed connection with the drive box 103. To ensure the connection strength between the support body 11 and the fixed shield 21, in this embodiment, inner stiffening plates 13 and outer stiffening plates 14 are respectively provided on the inner and outer sides of the support body 11.

[0050] like Figure 10 As shown, using the protective device of this invention, during the upward oblique excavation of the cutterhead 106, the cutterhead chamber can be separated from the drive box channel, effectively preventing falling objects (slag and rock) from the cutterhead chamber and the vicinity of the working face 107 from entering the drive box 103 and the inner casing, thus providing a dustproof function. During excavation, the sliding door 26 is closed. At this time, the front and rear lugs on the sliding door 26 are fitted with pins and bolts, connecting them to the fixed shielding component, effectively limiting the sliding door 26 and preventing it from separating from the fixed shielding component or having excessive gaps. When the cutterhead 106 needs maintenance, the equipment stops and the cutterhead stops rotating. The safety pins on the lugs are removed, and the bolts inside the lugs are unscrewed. The door drive device then drives the sliding door to open, allowing personnel to enter the cutterhead chamber for appropriate operations.

[0051] Embodiment 2 of the protective device for the inclined shaft tunnel boring machine of the present invention:

[0052] In Embodiment 1 of the protective device for the inclined shaft tunnel boring machine of the present invention, the shielding part is designed as a full shielding structure, that is, the shielding part completely blocks the central channel of the drive box. In this embodiment, unlike Embodiment 1, the shielding part is designed as a partial shielding structure, that is, it only blocks the part that may be injured by falling objects, such as only the part above a person's head.

[0053] Embodiment 3 of the protective device for the inclined shaft tunnel boring machine of the present invention:

[0054] In Embodiment 1 of the protective device for the inclined shaft tunnel boring machine of the present invention, the connecting part is designed as a detachable connection structure, that is, a detachable connection with the drive box can be achieved. In this embodiment, unlike Embodiment 1, the connecting part is directly designed as a welded connection structure, through which the entire device can be welded to the drive box.

[0055] Embodiment 4 of the protective device for the inclined shaft tunnel boring machine of the present invention:

[0056] In Embodiment 1 of the protective device for the inclined shaft tunnel boring machine of the present invention, a clearance fit structure is provided between the fixed shield and the inspection door, and dust leakage may occur at the gap between the two. In this embodiment, unlike Embodiment 1, a sealing component is provided between the fixed shield and the inspection door, thereby playing a dustproof role and meeting the requirements of the cutterhead working under pressure.

[0057] Embodiment 5 of the protective device for the inclined shaft tunnel boring machine of the present invention:

[0058] In Embodiment 1 of the protective device for the inclined shaft tunnel boring machine of the present invention, the inspection door is configured as a sliding door. In this embodiment, unlike Embodiment 1, the inspection door and the fixed shield are detachably connected via a flange. Of course, in other embodiments, the inspection door can also be configured as a swing door, and the door drive device can be correspondingly replaced with a motor.

[0059] Embodiment 6 of the protective device for the inclined shaft tunnel boring machine of the present invention:

[0060] In Embodiment 1 of the protective device for the inclined shaft tunnel boring machine of the present invention, the door drive device of the sliding door adopts a hydraulic cylinder. In this embodiment, unlike Embodiment 1, the door drive device adopts a gear and rack + motor structure. In other embodiments, the door drive device may also adopt a pneumatic cylinder.

[0061] Embodiments of the inclined shaft tunnel boring machine of the present invention:

[0062] The tunneling machine includes a drive box with a maintenance passage in the center. A protective device is provided on the drive box, which is the protective device of this invention, and will not be described in detail here.

Claims

1. A protective device for an inclined shaft tunnel boring machine, the protective device comprising a connecting part for connecting to the drive box of the tunnel boring machine and a shielding part for preventing falling objects from reaching workers inside the drive box, the connecting part being located at the circumferential outer edge of the shielding part; characterized in that, The connecting part includes a rearwardly extending support body located behind the fixed shielding member, and a connecting flange for connecting to the drive box is provided at the rear end of the support body; the support body is composed of various tile-shaped support plates distributed on the same cylinder, and the support plates are arranged at intervals along the circumference. The gaps between the support plates are configured to allow tools to be inserted for the installation and removal of cutting tools. Inner stiffening plates and outer stiffening plates are respectively provided on the inner and outer sides of the support body.

2. The protective device for an inclined shaft tunnel boring machine according to claim 1, characterized in that, The protective device includes a fixed shield, the connecting part is located on the outer periphery of the fixed shield, and the fixed shield is provided with an inspection door.

3. The protective device for an inclined shaft tunnel boring machine according to claim 2, characterized in that, The inspection door is a sliding door.

4. The protective device for an inclined shaft tunnel boring machine according to claim 3, characterized in that, The sliding door is equipped with an upper track and a lower track, and a detachable section is provided between the two ends of the lower track.

5. The protective device for an inclined shaft tunnel boring machine according to claim 4, characterized in that, The detachable section is located at the rear end of the sliding door when it is in the closed position.

6. The protective device for an inclined shaft tunnel boring machine according to any one of claims 2-5, characterized in that, The maintenance door is equipped with a door drive device, which is connected to the maintenance door in a transmission manner.

7. The protective device for an inclined shaft tunnel boring machine according to claim 6, characterized in that, The door drive device is a drive cylinder.

8. An inclined shaft tunnel boring machine, comprising a drive box, wherein a maintenance passage is provided at the center of the drive box, and a protective device is provided on the drive box, the protective device comprising a connecting part connected to the drive box of the tunnel boring machine and a shielding part for preventing falling objects from reaching the workers inside the drive box, wherein the connecting part is located at the circumferential outer edge of the shielding part; characterized in that, The connecting part includes a rearwardly extending support body located behind the fixed shielding member, and a connecting flange for connecting to the drive box is provided at the rear end of the support body; the support body is composed of various tile-shaped support plates distributed on the same cylinder, and the support plates are arranged at intervals along the circumference. The gaps between the support plates are configured to allow tools to be inserted for the installation and removal of cutting tools. Inner stiffening plates and outer stiffening plates are respectively provided on the inner and outer sides of the support body.

9. The inclined shaft tunnel boring machine according to claim 8, characterized in that, The protective device includes a fixed shield, the connecting part is located on the outer periphery of the fixed shield, and the fixed shield is provided with an inspection door.

10. The inclined shaft tunnel boring machine according to claim 9, characterized in that, The inspection door is a sliding door.

11. The inclined shaft tunnel boring machine according to claim 10, characterized in that, The sliding door is equipped with an upper track and a lower track, and a detachable section is provided between the two ends of the lower track.

12. The inclined shaft tunnel boring machine according to claim 11, characterized in that, The detachable section is located at the rear end of the sliding door when it is in the closed position.

13. The inclined shaft tunnel boring machine according to any one of claims 9-12, characterized in that, The maintenance door is equipped with a door drive device, which is connected to the maintenance door in a transmission manner.

14. The inclined shaft tunnel boring machine according to claim 13, characterized in that, The door drive device is a drive cylinder.

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