Material transportation device and tunneling system

Abstract

The invention belongs to the field of tunneling equipment, and particularly provides a material conveying device and a tunneling system. The device comprises a rack, a transport vehicle and an annular driving mechanism for driving the transport vehicle to move back and forth in a reciprocating mode, a fixing frame is fixed to the rack, a folding frame is hinged to the rear end of the fixing frame, a pitching driver for driving the folding frame to swing in a pitching mode is arranged for the folding frame, and rails for the transport vehicle to walk are arranged on the fixing frame and the folding frame. A track on the folding frame can swing in a pitching mode along with the folding frame, the swing stroke of the folding frame is provided with a butt joint position which swings upwards to be parallel to the fixing frame and is in butt joint with the track so that the transport vehicle can walk and a feeding position which swings downwards to the transport vehicle to conduct inclined feeding, and the transport vehicle is provided with a loading position used for loading tunneling materials. The system comprises the device. Long-distance mechanical material conveying can be achieved, the conveying efficiency and safety of materials needed by tunnel tunneling are improved, and the labor intensity of workers is reduced.

Description

Technical Field

[0001] This invention belongs to the field of tunneling equipment, and in particular relates to a material transport device and a tunneling system. Background Technology

[0002] When tunneling coal mine roadways, timely support is necessary to ensure construction safety, regardless of the tunneling method used. The materials required for support include anchor bolts, wire mesh, and steel strips, which need to be transported from back to front to the support face as tunneling progresses. It is easy to understand that the speed of material transport directly affects the efficiency of roadway support.

[0003] Limited by the height of the tunnel and the size of the tunneling equipment, a single transport device is insufficient to meet the long-distance transportation needs of various materials during tunnel excavation. Currently, most of the materials required for excavation in coal mine tunnels are manually transported from the rear of the tunneling equipment to the support face, resulting in low transportation efficiency, high labor intensity, and high safety risks. Summary of the Invention

[0004] The purpose of this invention is to provide a material transport device to solve the technical problems of low material transport efficiency, poor safety, and high labor intensity in existing tunneling technologies. Another purpose of this invention is to provide a tunneling system to solve the same technical problems.

[0005] To achieve the above objectives, the technical solution of the material transport device provided by the present invention is as follows: A material transport device includes a frame, a transport vehicle, and a ring drive mechanism for driving the transport vehicle to move back and forth. A fixed frame is fixed on the frame, and a folding frame is hinged to the rear end of the fixed frame. A pitch driver is provided for the folding frame to drive its pitch swing. The fixed frame and the folding frame are provided with tracks for the transport vehicle to travel on. The tracks on the folding frame can swing with the pitch of the folding frame. During the swing stroke of the folding frame, there are two positions: an upward swing to a docking position where it is parallel to the fixed frame and the tracks are aligned for the transport vehicle to travel on, and a downward swing to a loading position where the transport vehicle is tilted to load materials. The ring drive mechanism includes a ring traction member driven by a rotary driver. The length of the ring traction member is sufficient for the transport vehicle to move from the front end of the fixed frame to the rear end of the folding frame. The transport vehicle is provided with a loading position for loading excavated materials.

[0006] As a further improvement, a support structure that can swing with the folding frame is provided at the hinge position between the fixed frame and the folding frame. The support structure includes a bracket and a roller rotatably mounted on the bracket. The roller is used to support the annular traction component.

[0007] As a further improvement, the outer periphery of the idler roller is provided with a roller groove, and the annular traction component is placed in the roller groove.

[0008] As a further improvement, the fixed frame and the folding frame are provided with guide grooves, and an annular traction element is provided in the guide grooves so that it always maintains a straight line when moving.

[0009] As a further improvement, the ring drive mechanism includes a driving sprocket and a driven sprocket, and the ring traction member is a ring chain that passes around the driving sprocket and the driven sprocket. The driving sprocket is connected to the rotary drive and is mounted on a fixed frame, while the driven sprocket is mounted on a folding frame.

[0010] As a further improvement, the driven sprocket is radially movable and mounted on the folding frame. A tensioning structure is provided for the driven sprocket so that the position of the driven sprocket can be adjusted by adjusting the tensioning structure, thereby keeping the ring chain taut.

[0011] As a further improvement, the ring drive mechanism includes two sets of chain drive mechanisms consisting of a driving sprocket, a driven sprocket, and a ring chain, and the two sets of chain drive mechanisms are driven by the same rotary driver.

[0012] As a further improvement, each of the fixed frame and the folding frame is equipped with at least one proximity switch, and the transport vehicle is equipped with a triggering structure capable of triggering the proximity switches, so as to determine the moving position of the transport vehicle by judging the triggering status of the proximity switches.

[0013] As a further improvement, the transport vehicle is provided with two sets of retaining members spaced apart front to back, the position between the two sets of retaining members constituting the loading position or a part of the loading position, so as to restrict the position of the material by means of retaining members.

[0014] This invention is a pioneering invention, and its beneficial effects are as follows: The material transport device provided by this invention enables long-distance material transport during tunneling. Specifically, the transport device can be mounted on a tunneling machine or arranged in a roadway (tunnel). The lengths of the fixed frame and the folding frame can be set according to the material transport requirements. The folding frame is located at the rear end of the fixed frame, and the transport vehicle can move back and forth under the action of a ring drive mechanism. When it is necessary to transport tunneling materials from back to front, the folding frame can be lowered, and the transport vehicle can be moved onto the folding frame for easy loading of the materials to be transported. After the materials are loaded, the folding frame can be raised, and the transport vehicle can smoothly move onto the fixed frame and continue to transport materials forward, thereby realizing mechanized material transport, improving material transport efficiency and safety, and reducing the labor intensity of personnel.

[0015] To achieve the above objectives, the technical solution of the tunneling system provided by this invention is as follows: A tunneling system includes tunneling equipment and a material transport device for the tunneling equipment. The material transport device includes a frame, a transport vehicle, and a ring drive mechanism for driving the transport vehicle to move back and forth. A fixed frame is fixed on the frame, and a folding frame is hinged to the rear end of the fixed frame. A pitch driver is provided for the folding frame to drive its pitch swing. The fixed frame and the folding frame are provided with tracks for the transport vehicle to travel on. The tracks on the folding frame can swing with the pitch of the folding frame. During the swing stroke of the folding frame, it swings upward to a docking position where it is parallel to the fixed frame and the tracks are aligned for the transport vehicle to travel on, and swings downward to a loading position where the transport vehicle is tilted to load materials. The ring drive mechanism includes a ring traction member driven by a rotary driver. The length of the ring traction member is sufficient for the transport vehicle to move from the front end of the fixed frame to the rear end of the folding frame. The transport vehicle is provided with a loading position for loading tunneling materials.

[0016] As a further improvement, a support structure that can swing with the folding frame is provided at the hinge position between the fixed frame and the folding frame. The support structure includes a bracket and a roller rotatably mounted on the bracket. The roller is used to support the annular traction component.

[0017] As a further improvement, the outer periphery of the idler roller is provided with a roller groove, and the annular traction component is placed in the roller groove.

[0018] As a further improvement, the fixed frame and the folding frame are provided with guide grooves, and an annular traction element is provided in the guide grooves so that it always maintains a straight line when moving.

[0019] As a further improvement, the ring drive mechanism includes a driving sprocket and a driven sprocket, and the ring traction member is a ring chain that passes around the driving sprocket and the driven sprocket. The driving sprocket is connected to the rotary drive and is mounted on a fixed frame, while the driven sprocket is mounted on a folding frame.

[0020] As a further improvement, the driven sprocket is radially movable and mounted on the folding frame. A tensioning structure is provided for the driven sprocket so that the position of the driven sprocket can be adjusted by adjusting the tensioning structure, thereby keeping the ring chain taut.

[0021] As a further improvement, the ring drive mechanism includes two sets of chain drive mechanisms consisting of a driving sprocket, a driven sprocket, and a ring chain, and the two sets of chain drive mechanisms are driven by the same rotary driver.

[0022] As a further improvement, each of the fixed frame and the folding frame is equipped with at least one proximity switch, and the transport vehicle is equipped with a triggering structure capable of triggering the proximity switches, so as to determine the moving position of the transport vehicle by judging the triggering status of the proximity switches.

[0023] As a further improvement, the transport vehicle is provided with two sets of retaining members spaced apart front to back, the position between the two sets of retaining members constituting the loading position or a part of the loading position, so as to restrict the position of the material by means of retaining members.

[0024] This invention is a pioneering invention, and its beneficial effects are as follows: The material transport device provided by this invention enables long-distance material transport during tunneling. Specifically, the transport device can be mounted on a tunneling machine or arranged in a roadway (tunnel). The lengths of the fixed frame and the folding frame can be set according to the material transport requirements. The folding frame is located at the rear end of the fixed frame, and the transport vehicle can move back and forth under the action of a ring drive mechanism. When it is necessary to transport tunneling materials from back to front, the folding frame can be lowered, and the transport vehicle can be moved onto the folding frame for easy loading of the materials to be transported. After the materials are loaded, the folding frame can be raised, and the transport vehicle can smoothly move onto the fixed frame and continue to transport materials forward, thereby realizing mechanized material transport, improving material transport efficiency and safety, and reducing the labor intensity of personnel. Attached Figure Description

[0025] Figure 1 This is a front view of an embodiment of the material transport device in this invention; Figure 2 This is a schematic diagram of the structure of the material transport device embodiment of the present invention when the folding frame is in the loading position; Figure 3 This is a schematic diagram of a transport vehicle in an embodiment of the material transport device of the present invention; Figure 4 This is a partially enlarged view of the front end of the material transport device embodiment of the present invention; Figure 5 This is a partially enlarged view of the hinged portion of an embodiment of the material transport device in this invention; Figure 6 This is a partially enlarged view of the rear end portion of the material transport device embodiment in this invention.

[0026] Explanation of reference numerals in the attached figures: 1. Frame; 2. Fixed frame; 3. Folding frame; 4. Transport vehicle; 5. Folding cylinder; 6. Drive assembly; 7. Proximity switch; 8. Track; 9. Guide groove; 10. Guide groove frame; 11. Ring chain; 12. Hinge seat; 13. Hinge shaft; 14. Idler roller; 15. Diagonal brace; 16. Driven assembly; 17. Tensioning screw; 18. Adjusting seat; 401. Front retainer; 402. Rear retainer; 403. Triggering structure; 404. Roller; 405. Chain connection; 406. Crossbeam; 601. Drive wheel assembly; 602. Transmission assembly; 603. Motor mount; 604. Hydraulic motor; 605. Drive sprocket. Detailed Implementation

[0027] Regardless of the excavation method used, timely tunnel support is necessary to ensure construction safety during tunnel excavation. The materials required for support must be transported from the rear to the front of the support face. It's easy to understand that material transport efficiency directly impacts construction efficiency.

[0028] To improve material conveying efficiency, the basic technical concept of this invention is to provide a novel transport device capable of transporting materials over long distances from back to front. The device comprises two main parts: a base and a transport vehicle. The base serves as the fixed foundation for the device and can be installed on tunnel boring equipment or the tunnel wall as needed. The transport vehicle can move back and forth along the base to carry and transport materials. The base can be further divided into a fixed section and a folding section. The folding section is located at the rear and can swing downwards to lower the transport vehicle to a lower position, facilitating loading by workers. To support long-distance transport, the base is equipped with a ring-shaped drive mechanism. The linear portion of the ring-shaped traction component reciprocates to pull the transport vehicle back and forth.

[0029] Based on the above concept, the present invention will be further described in detail below with reference to the embodiments.

[0030] Specific embodiments of the material transport device provided by the present invention: like Figure 1 and Figure 2 As shown, the material transport device provided in this embodiment includes a frame 1, a fixed frame 2 fixed on the frame 1, and a folding frame 3 hinged to the rear end of the fixed frame 2, so that the folding frame 3 has the freedom to swing up and down relative to the fixed frame 2. Of course, to ensure that the folding frame 3 can swing actively and controllably, a pitch driver is provided for the folding frame 3 to drive its pitch swing. In a preferred embodiment, the pitch driver can be a hydraulic cylinder, namely the folding cylinder 5 shown in the figure for driving the folding frame 3 to swing. Of course, in other embodiments, the pitch driver can also be other devices, such as a hydraulic motor 604. The folding frame 3 can be fixedly connected to a gear shaft, the gear shaft is rotatably mounted on the fixed frame 2, and the hydraulic motor 604 is connected to the gear shaft through a gear reducer, so as to realize the swing of the folding frame 3 by driving the gear shaft to rotate forward and reverse.

[0031] The material transport device also includes a transport vehicle 4, which can move on the fixed frame 2 and the folding frame 3. Specifically, the fixed frame 2 and the folding frame 3 are provided with tracks 8 for the transport vehicle 4 to travel on. Preferably, such as Figure 3 As shown, rollers 404 can be installed on the folding cart, and the rollers 404 can move along the wheel grooves on the track 8. However, it should be emphasized that in other embodiments, ball bearing sliders can be installed on the folding cart, and the ball bearing sliders can be clamped on the track 8 and guided to move along the track 8.

[0032] The track 8 on the folding frame 3 is fixed relative to the folding frame 3 and can swing fixedly with the folding frame 3. Figure 1 When the folding frame 3 shown is in a horizontal state, the track 8 on the folding frame 3 and the track 8 on the fixed frame 2 can be connected so that the transport vehicle 4 can move from the folding frame 3 to the fixed frame 2 or from the fixed frame 2 to the folding frame 3. That is, the folding frame 3 has a position parallel to the fixed frame 2 and connected to the track 8 during its upward swing stroke. This position can be defined as the docking position for the transport vehicle 4 to travel.

[0033] like Figure 2 As shown, when loading materials (cargo), the folding frame 3 can swing downwards to the tilted position of the transport vehicle 4, which can be defined as the loading position for tilted loading.

[0034] In order to achieve the reciprocating motion of the transport vehicle 4 without affecting the normal folding and swinging of the folding frame 3, in this embodiment, the transport vehicle 4 is equipped with a ring drive mechanism to drive its reciprocating motion. The so-called ring drive mechanism refers to a mechanism that includes a ring traction member and a rotary power unit. For example, the ring traction member is a chain drive mechanism of a ring chain 11, or a belt drive structure of a ring belt. The figure shows an exemplary chain drive mechanism.

[0035] The length of the annular traction component is sufficient for the transport vehicle 4 to move from the front end of the fixed frame 2 to the rear end of the folding frame 3, in order to meet the requirements of long-distance material delivery.

[0036] In addition, to ensure proper loading of materials required during tunneling, a loading position is provided on the transport vehicle 4 for loading tunneling materials.

[0037] by Figures 1-2 Taking the material transport device shown as an example, its principle for transporting materials is as follows: The transport vehicle 4 moves onto the folding frame 3, and the folding cylinder 5 is adjusted to retract, allowing the transport vehicle 4 to descend to a suitable height along with the folding frame 3. Personnel, either directly or by operating equipment, place the materials to be transported (e.g., anchor bolts, wire mesh, steel strips, etc.) onto the loading position of the transport vehicle 4. The folding cylinder 5 is then extended to ensure that the folding frame 3 and the fixed frame 2 are parallel and at the same height. The rotary drive of the ring drive mechanism is controlled to rotate (forward), causing the ring chain 11 to move and transport the materials from back to front on the transport vehicle 4 until the materials are delivered to the front end of the fixed frame 2. Personnel then unload the materials, completing the feeding process. For the next feeding, the rotary drive of the ring drive mechanism is controlled to rotate (reverse), driving the transport vehicle 4 backward onto the folding frame 3 to begin the next cycle.

[0038] As can be seen from the above analysis, the material transport device provided in this embodiment can realize long-distance mechanized material transport, improve the transport efficiency and safety of materials required for tunneling, and reduce the labor intensity of personnel.

[0039] In a preferred embodiment, such as Figure 1 , Figure 2 and Figure 5 As shown, a support structure is provided at the hinge position between the fixed frame 2 and the folding frame 3. The support structure can swing with the folding frame 3. The support structure includes a bracket and a roller 14 that rotates on the bracket. The roller 14 is used to support the annular traction component, corresponding to the annular chain 11 shown in the figure.

[0040] Specifically, the bracket of the supporting structure can be fixed to the folding frame 3. Or, as... Figure 1 , Figure 2 and Figure 5 As shown, hinge seats 12 are connected to the left and right sides (horizontally) of the folding frame 3, and hinge shafts 13 are connected to the hinge seats 12. The frame is then hinged to the rear end of the fixed frame 2 via the hinge shafts 13. The bracket can be fixed on the hinge seats 12.

[0041] By configuring a support structure, this preferred embodiment can support the annular traction member when the folding frame 3 swings up and down, preventing the annular traction member from falling off due to lack of support (chain detachment).

[0042] In a further preferred embodiment, such as Figure 2 As shown, the outer periphery of the idler roller 14 is provided with a roller groove, and the annular traction member (i.e., the annular chain 11) is set in the roller groove. At this time, the roller groove can limit the annular traction member and improve the anti-detachment effect.

[0043] In some preferred embodiments, such as Figure 1 , Figure 2 , Figures 4-6 As shown, guide grooves 9 are provided on the fixed frame 2 and the folding frame 3. Specifically, the guide groove 9 is an upward-facing groove formed by the enclosing of groove-shaped structural components, which guides and supports the annular traction component. The annular traction component is located in the guide groove 9, and under the action of the guide groove 9, the annular traction component can always maintain a straight line when moving. The guide groove 9 can be fixed to the fixed frame 2 and the folding frame 3 respectively by the guide groove bracket 10.

[0044] In some preferred embodiments, such as Figure 1 , Figure 2 , Figure 4 and Figure 6 As shown, the ring drive mechanism adopts a chain drive mechanism, which naturally includes a drive assembly 6 and a driven assembly 16. The drive assembly 6 includes a drive wheel assembly 601, which includes a rotary driver (e.g., a hydraulic motor 604 or an electric motor) and a drive sprocket 605 connected by a transmission assembly 602. The driven assembly 16 includes a driven sprocket, and the ring chain 11 passes around the drive sprocket 605 and the driven sprocket.

[0045] The drive assembly 6 is mounted on the fixed frame 2. Specifically, the drive sprocket 605 is rotatably mounted on the fixed frame 2 via an axle and bearings, and the rotary drive is fixed on the fixed frame 2 via a motor mount 603. The driven assembly 16 is mounted on the folding frame 3. In this way, when adjusting the swing of the folding frame 3, the drive assembly 6 can remain stationary, and the rotary drive (i.e., the hydraulic motor 604 or an electric motor) can also remain stationary, avoiding damage to the wiring harness connected to the rotary drive or the rotary drive itself due to large swings.

[0046] More preferably, the driven sprocket in the driven assembly 16 is radially movable and mounted on the folding frame 3. Specifically, both ends of the sprocket shaft of the driven sprocket can be mounted on a movable sliding seat via bearings. The sliding seat can move along the folding frame 3, and an adjusting seat 18 for guiding the sliding seat can be correspondingly configured on the folding frame 3. A tensioning structure is provided for the driven sprocket, and the position of the driven sprocket can be adjusted by adjusting the tensioning structure, thereby keeping the annular chain 11 in a taut state and preventing chain derailment.

[0047] The tensioning structure adjusts by moving the sliding seat to change the position of the driven sprocket. In some embodiments, such as... Figure 6 As shown, the tensioning structure can employ a manually adjustable screw-nut mechanism, which includes a linearly movable tension screw 17. By turning the nut mechanism connected to the tension screw 17, the tension screw 17 can be driven to move, thereby moving the sliding seat. This manual adjustment method has advantages such as high precision and ease of operation. However, it should be emphasized that in other embodiments, the use of an electric push rod to drive the sliding seat adjustment and movement is not excluded.

[0048] More preferably, such as Figure 1 , Figures 3-6 As shown, in order to accurately determine the position of the transport vehicle 4, a proximity switch 7 is provided on both the fixed frame 2 and the folding frame 3. A triggering structure 403 is provided on the transport vehicle 4 to trigger the proximity switches 7. During the movement of the transport vehicle 4, the triggering structure 403 triggers the proximity switches 7, thus accurately determining the current position of the transport vehicle 4. At a minimum, each of the fixed frame 2 and the folding frame 3 has at least one proximity switch 7 to determine whether the transport vehicle 4 is currently on the fixed frame 2 or the folding frame 3. Preferably, proximity switches 7 can be provided at different positions on the fixed frame 2 and the folding frame 3.

[0049] Both the proximity switch 7 and the triggering structure 403 can be directly adopted from existing technologies. The triggering structure 403 can be a magnetic triggering structure 403, and the proximity switch 7 has a communication module.

[0050] like Figure 3As shown, in some preferred embodiments, the transport vehicle 4 is provided with two sets of retaining members spaced apart front and rear, namely a front retaining member 401 and a rear retaining member 402. Each set of front retaining members 401 and rear retaining members 402 has two left and right spaced apart. The position between the front retaining members 401 and the rear retaining members 402 can be used to place the materials required for tunneling. At this time, the front retaining members 401 and the rear retaining members 402 can play the role of restricting the position of the materials to stabilize the materials. That is to say, the position between the front retaining members 401 and the rear retaining members 402 constitutes the loading position.

[0051] like Figure 3 and Figure 4 As shown, the front retainer 401 can be slotted, and the slotted position can also be used to place tunneling materials, which is equivalent to part of the loading position. Based on this, the position between the front retainer 401 and the rear retainer 402 constitutes part of the loading position.

[0052] The transport vehicle 4 specifically includes a crossbeam 406 and longitudinal beams connected to both ends of the crossbeam 406. The bottom end of the longitudinal beam is provided with a part for connecting the annular traction component, namely the chain connection part 405 shown in the figure. The front retainer 401 and the rear retainer 402 are provided on the longitudinal beam.

[0053] Furthermore, the frame 1 of the material handling device refers to the fixed foundation for fixing the fixed frame 2. It can support the lower end of the fixed frame 2 and includes rigid support legs. In use, the fixed frame 2 can be fixed to the tunneling equipment or tunnel wall through the frame 1. To improve strength, diagonal braces 15 can be connected to the fixed frame 2 at both the front and rear ends of the frame 1.

[0054] Specific implementation methods of the tunneling system provided by this invention: The tunneling system includes tunneling equipment, which can be a full-face tunnel boring machine or a cantilever tunnel boring machine. The tunneling system equips the tunneling equipment with a material transport device that is consistent with the above-described material transport device implementation method, for transporting the materials required for tunneling from back to front, which will not be described in detail here.

[0055] Finally, it should be noted that the above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still make modifications to the technical solutions described in the foregoing embodiments without creative effort, or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A material conveying device, characterized in that, The device includes a frame, a transport vehicle, and a ring drive mechanism that drives the transport vehicle to move back and forth. A fixed frame is fixed on the frame, and a folding frame is hinged to the rear end of the fixed frame. The folding frame is equipped with a pitch driver that drives its pitch swing. The fixed frame and the folding frame are provided with tracks for the transport vehicle to travel on. The tracks on the folding frame can swing with the pitch of the folding frame. During the swing stroke of the folding frame, it swings upward to a docking position where it is parallel to the fixed frame and the tracks are aligned for the transport vehicle to travel on, and swings downward to a loading position where the transport vehicle is tilted to load materials. The ring drive mechanism includes a ring traction member driven by a rotary driver. The length of the ring traction member is sufficient for the transport vehicle to move from the front end of the fixed frame to the rear end of the folding frame. The transport vehicle is provided with a loading position for loading tunneling materials.

2. The material conveying device according to claim 1, characterized in that, A support structure is provided at the hinge position between the fixed frame and the folding frame, which can swing with the folding frame. The support structure includes a bracket and a roller rotatably mounted on the bracket. The roller is used to support the annular traction component.

3. The material conveying device according to claim 2, characterized in that, The outer circumference of the idler roller is provided with a roller groove, and the annular traction component is placed in the roller groove.

4. The material conveying device according to any one of claims 1-3, characterized in that, The fixed frame and the folding frame are provided with guide grooves, and the annular traction component is located in the guide grooves so that it always keeps a straight line when moving.

5. The material conveying device according to any one of claims 1-3, characterized in that, The ring drive mechanism includes a driving sprocket and a driven sprocket. The ring traction component is a ring chain that passes around the driving sprocket and the driven sprocket. The driving sprocket is connected to the rotary drive and is mounted on a fixed frame, while the driven sprocket is mounted on a folding frame.

6. The material conveying device according to claim 5, characterized in that, The driven sprocket is radially movable and mounted on the folding frame. A tensioning structure is provided for the driven sprocket so that the position of the driven sprocket can be adjusted by adjusting the tensioning structure, thereby keeping the ring chain taut.

7. The material conveying device according to claim 5, characterized in that, The ring drive mechanism includes two sets of chain drive mechanisms consisting of a driving sprocket, a driven sprocket, and a ring chain, and both sets of chain drive mechanisms are driven by the same rotary driver.

8. The material conveying device according to any one of claims 1-3, characterized in that, The fixed frame and the folding frame are each equipped with at least one proximity switch, and the transport vehicle is equipped with a triggering structure that can trigger the proximity switches, so as to determine the moving position of the transport vehicle by judging the triggering status of the proximity switches.

9. The material conveying device according to any one of claims 1-3, characterized in that, The transport vehicle is equipped with two sets of retaining members spaced apart front to back. The position between the two sets of retaining members constitutes the loading position or a part of the loading position, so as to restrict the position of the material by means of retaining members.

10. A tunneling system, including tunneling equipment, characterized in that, The tunneling equipment is equipped with the material transport device as described in any one of claims 1-9.

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