Self-following retractable belt conveyor for cutting holes

Abstract

The present invention discloses a self-following retractable belt conveyor for cutting holes, which comprises a discharge transmission part, a belt storage bin, a belt unwinding device, a tail receiving part, a unit body, an automatic unit body installation device and a conveyor belt. The belt storage bin is provided with a sliding frame, a belt storage bin frame and a frequency conversion tensioning device. The sliding frame can slide in the belt storage bin, a first roller group is provided on the sliding frame, a second roller group is provided on the belt storage bin frame, the frequency conversion tensioning device is provided in the belt storage bin and connected with the first roller group, the belt unwinding device is located between the belt storage bin and the discharge transmission part, the tail receiving part is connected with the tunneling machine through a rotating mechanism, the first end of the unit body is connected with the tail receiving part, and the automatic unit body installation device moves another unit body to the second end of the unit body and fixes it. The self-following retractable belt conveyor for cutting holes provided by the present invention has the advantages of automatic body installation, installation boundary and high conveying efficiency.

Description

Technical Field

[0001] The invention relates to the technical field of industrial and mining conveyors, in particular to a self-following telescopic belt conveyor for cutting holes. Background Art

[0002] In order to solve the material transportation problem when excavating the cut-eye tunnel of the underground mining face, in order to ensure the installation of the mining equipment of the fully mechanized mining face, it is necessary to excavate the cut-eye tunnel first. Since the cut-eye tunnel and the main transportation tunnel are at an angle of 90°, it is impossible to use a straight chute conveyor for straight transportation. Therefore, how to quickly transport materials when using large-section fast excavation equipment to excavate the cut-eye tunnel has become the primary problem. In the related technology, a horizontal turning device is used in the transportation mode of the cut-eye tunnel. The principle is that this special equipment is used to force the belt to change its running direction, which will cause serious stretching of the belt. It will not only increase the resistance of the conveyor, but also cause waves on the side of the belt after running for a period of time. More importantly, the resistance of the horizontal turning device to the belt will affect the sensitivity of the floating trolley of the storage bin, affecting the overall operation of the main transportation chute conveyor; multiple scraper conveyors are used for series transportation. Due to the limited length and transportation capacity of the scraper conveyor, not only multiple series overlap transportation is required, but also the overlap links are many and the control is complex. In addition, the scraper conveyor has a small transportation capacity and cannot meet the current demand for large-scale rapid excavation; the use of mine cars for transportation is discontinuous transportation, which not only has a small transportation capacity and low efficiency, but also requires the installation of running tracks, which is complicated to move. The DSJ type retractable belt conveyor is used for continuous transportation and high efficiency, but the length of the section from the head station to the storage bin is long, and it needs to be drilled for nearly 50 meters before installation. In addition, the conveyor cannot be equipped with a fuselage by itself, and the excavator cannot follow when moving. Summary of the invention

[0003] The present invention aims to solve one of the technical problems in the related art to at least a certain extent. To this end, an embodiment of the present invention provides a self-following retractable belt conveyor for cutting holes, which has the advantages of automatic installation of the fuselage, installation boundary, and high conveying efficiency.

[0004] The conveyor belt conveyor of claim 1, wherein the conveyor belt conveyor comprises a first roller group, a second roller group, a third roller group, a fourth roller group, a fifth ... The second end of the part is provided with a fixing part, the rotating mechanism is located at the lower part of the first end of the tail receiving part, the first end of the unit fuselage is connected to the tail receiving part, the automatic unit fuselage installation device is located between the unloading transmission part and the unit fuselage, the automatic unit fuselage installation device moves the other unit fuselage to the second end of the unit fuselage and fixes it, the automatic unit fuselage installation device includes a transport vehicle and a pushing cylinder group, the pushing cylinder group includes a pushing main oil cylinder, a front pushing group and a rear pushing group, the pushing main oil cylinder pushes the transport vehicle to the bottom of the conveyor fuselage, the front pushing group presses the tail of the unit fuselage through a pressing plate to fix the unit fuselage, and the rear pushing group drives the other unit fuselage to be fixed to the unit fuselage through a slot, and the conveyor belt passes through the lower part of the conveyor fuselage and wraps around the frequency conversion tensioning device, the belt storage bin and the tail receiving part to form a closed loop.

[0005] The self-following retractable belt conveyor for eyelet cutting according to the embodiment of the present invention has the advantages of automatic installation of the fuselage, installation boundary and high conveying efficiency.

[0006] In some embodiments, the unloading transmission part includes an unloading roller and a backstop.

[0007] In some embodiments, the variable frequency tensioning device includes a variable frequency winch and a drive motor, the drive motor is transmission-connected to the variable frequency winch, and the variable frequency winch pulls the first roller group to move along the track of the belt storage rack.

[0008] In some embodiments, a first side of the bottom of the first roller group has a limiting wheel, the limiting wheel is clamped on the track, and two groups of guide wheels are provided on the top of the first roller group, and the guide wheels move along the tape storage rack.

[0009] In some embodiments, a pin hook is provided at the first end of the unit fuselage, and a fixing piece is provided at the second end of the unit fuselage. The pin hook is fixed in cooperation with the fixing piece of the tail receiving part or another unit fuselage.

[0010] In some embodiments, the unwinding device includes a support frame and running wheels, and the support frame approaches and moves away from the conveyor belt along a track via the running wheels. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 1 is a schematic diagram of the use status of the self-following retractable belt conveyor for eyelet cutting according to an embodiment of the present invention.

[0012] Figure 2 1 is a schematic diagram of the structure of a self-following retractable belt conveyor for eyelet cutting according to an embodiment of the present invention.

[0013] Figure 3 1 is a schematic diagram of the structure of a belt storage bin of a self-advancing retractable belt conveyor for eyelet cutting according to an embodiment of the present invention.

[0014] Figure 4 The invention relates to a self-advancing retractable belt conveyor for cutting holes according to an embodiment of the present invention. Figure 3 Schematic diagram of the cross section along the AA direction.

[0015] Figure 5 The invention relates to a self-advancing retractable belt conveyor for cutting holes according to an embodiment of the present invention. Figure 4 A partial enlarged schematic diagram of the guide wheel in part I.

[0016] Figure 6 The invention relates to a self-advancing retractable belt conveyor for cutting holes according to an embodiment of the present invention. Figure 4 A partial enlarged schematic diagram of the limit wheel in part II.

[0017] Figure 7 1 is a schematic structural diagram of a belt unwinding device of a self-advancing retractable belt conveyor for eyelet cutting according to an embodiment of the present invention.

[0018] Figure 8 1 is a schematic diagram of the use status of the belt unwinding device of the self-following retractable belt conveyor for eyelet cutting according to an embodiment of the present invention.

[0019] Fig. 9 1 is a schematic diagram of the idle state of the belt unwinding device of the self-following retractable belt conveyor for eyelet cutting according to an embodiment of the present invention.

[0020] Fig.10 It is a structural schematic diagram of the unloading transmission part of the self-following retractable belt conveyor for eyelet cutting according to an embodiment of the present invention.

[0021] Fig.11 It is a side view of the unloading transmission part of the self-following retractable belt conveyor for cutting holes according to an embodiment of the present invention.

[0022] Fig.12 It is a schematic structural diagram of an automatic installation unit body device of a self-following retractable belt conveyor for eyelet cutting according to an embodiment of the present invention.

[0023] Fig.13 The invention relates to a self-advancing retractable belt conveyor for cutting holes according to an embodiment of the present invention. Fig.12 Schematic diagram of the cross section along the BB direction.

[0024] Fig.14 The invention relates to a self-advancing retractable belt conveyor for cutting holes according to an embodiment of the present invention. Fig.12 Schematic diagram of the cross-section in the CC direction.

[0025] Fig.15 1 is a schematic structural diagram of a unit body of a self-advancing retractable belt conveyor for eyelet cutting according to an embodiment of the present invention.

[0026] Fig.16 It is a schematic structural diagram of the tail material receiving part of the self-following retractable belt conveyor for eyelet cutting according to an embodiment of the present invention.

[0027] Fig.17 The invention relates to a self-advancing retractable belt conveyor for cutting holes according to an embodiment of the present invention. Fig.16 Schematic diagram of the cross section along the DD direction.

[0028] Fig.18 The invention relates to a self-advancing retractable belt conveyor for cutting holes according to an embodiment of the present invention. Fig.16 Schematic diagram of the cross section in the EE direction.

[0029] Figure numerals: 1. frequency conversion tensioning device; 101. frequency conversion winch; 102. driving motor; 2. belt storage bin; 201. sliding frame; 202. belt storage bin frame; 203. first roller group; 204. second roller group; 3. belt unwinding device; 301. supporting frame; 302. walking wheel; 4. unloading transmission part; 401. unloading roller; 5. automatic fuselage installation device; 501. transport vehicle; 502. main oil cylinder for pushing; 503. front pushing group; 504. rear pushing group; 505. detection device; 6. unit fuselage; 601. pin hook; 602. fixing part; 7. tail receiving part; 8. conveyor belt; 9. redirecting roller. DETAILED DESCRIPTION

[0030] Embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to be used to explain the present invention, but should not be understood as limiting the present invention.

[0031] In order to ensure the installation of large-size mining equipment in the fully mechanized mining face, it is necessary to excavate a large-section cut-eye tunnel. The construction sequence of the cut-eye tunnel is to excavate the transport drift first, and then excavate the cut-eye tunnel after it is in place. Generally, according to different working conditions and geological conditions, the length of the cut-eye tunnel is between 200 and 400 meters, the opening position is at the end of the transport drift, and the tunnel is excavated at a 0° azimuth angle. The transport drift is arranged along the top and bottom of the coal seam and excavated at a 90° azimuth angle.

[0032] According to the self-following retractable belt conveyor for cutting holes according to the embodiment of the present invention, Figures 1 to 18 The self-following retractable belt conveyor for cutting eye shown in the figure comprises a discharge transmission part, a belt storage bin, a belt unwinding device, a tail receiving part, a unit body, an automatic unit body installation device and a conveyor belt. The belt storage bin is located at the first end of the discharge transmission part. The belt storage bin is an integral frame structure. The belt storage bin adopts a multi-layer repeated winding storage method to store belts. The net storage length can reach 100m, which can maximize the use of the tunnel height space, reduce the occupation of the tunnel length space, and thus reduce the tunnel excavation depth. The belt storage bin is provided with a sliding frame, a belt storage bin frame and a frequency conversion tensioning device. The sliding frame can slide in the belt storage bin. The sliding frame is provided with a first roller group, and the belt storage bin frame is provided with a second roller group. The frequency conversion tensioning device is provided in the belt storage bin and connected to the first roller group to drive the first roller group to move. Since the belt storage bin is an integral frame structure and is only subjected to internal force but not external force in the horizontal direction, the length is much greater than the height, and there is no overturning, so there is no need for foundation fixation. The belt unwinding device is located between the belt storage bin and the unloading transmission part to store the whole roll of conveyor belt. The tail receiving part is connected to the tunneling machine through a rotating mechanism. The first end of the unit body is connected to the tail receiving part. The automatic unit body installation device is located between the unloading transmission part and the unit body. The automatic unit body installation device moves another unit body to the second end of the unit body and fixes it. The conveyor belt passes through the lower part of the conveyor body and is wrapped around the frequency conversion tensioning device, the belt storage bin, and the tail receiving part to form a closed loop. The conveyor belt passes through the lower part of the main transport chute conveyor of the overlapping transport, and the belt storage layer is arranged at the first end of the unloading transmission part of the conveyor. During installation, the conveyor can be installed by only digging a section of blind alley in the cut-eye tunnel and the opposite side. The unloading transmission part is not affected by the installation of the belt storage bin and can shorten the installation length of the conveyor to the maximum extent. The tunnel boring machine only needs to dig a short distance to use the conveyor to continuously transport materials, which speeds up the tunneling speed. The automatic installation unit fuselage device arranged at the second end of the unloading transmission part can realize the automatic installation of the fuselage without stopping the conveyor. The rear material receiving part is hingedly connected to the tunnel boring machine, and the tunnel boring machine is not stopped due to the connection of the unit fuselage, thereby improving the tunneling efficiency.

[0033] The self-following retractable belt conveyor for eyelet cutting according to the embodiment of the present invention has the advantages of automatic installation of the fuselage, installation boundary and high conveying efficiency.

[0034] In some embodiments, Fig.10 and Fig.11 As shown, the unloading transmission part includes an unloading roller and a backstop.

[0035] Specifically, the unloading transmission part adopts an integrated design, and the unloading roller adopts a permanent magnet electric roller. The permanent magnet electric roller is an internal drive roller. The permanent magnet electric roller occupies a small space, has high transmission efficiency, and good energy saving. The backstop is arranged inside the permanent magnet electric roller, and the backstop limits the reverse rotation of the transmission roller.

[0036] In some embodiments, Figure 2 and Figure 3 As shown, the variable frequency tensioning device includes a variable frequency winch and a drive motor, the drive motor is transmission-connected to the variable frequency winch, and the variable frequency winch pulls the first roller group to move along the track of the belt storage rack.

[0037] Specifically, the variable frequency tensioning device adopts a permanent magnet variable frequency drive motor, which has a fast response speed and can adapt to the needs of the belt storage bin to compensate for the tape and tension in time when the tunnel boring machine moves forward at different speeds. The permanent magnet variable frequency tensioning device is arranged at one end of the belt storage bin away from the unloading transmission part. The roller groups are stacked and placed at both ends of the belt storage bin, the first roller group is arranged on the sliding frame, the second roller group is fixed on the belt storage bin frame, the sliding frame slides on the track in the belt storage bin frame, and the variable frequency winch is arranged on the belt storage bin frame to pull the first roller group to move to realize the storage and release of the tape. In the early stage of the operation of the conveyor, the belt unwinding device unwinds the tape, the first roller group moves away from the second roller group under the action of the variable frequency winch, and the belt storage bin is full of tape. As the tunnel boring machine moves forward, the conveyor needs to be extended, the variable frequency tensioning device releases the first roller group, and the belt storage bin releases the stored tape to compensate for the tape required for the extension of the conveyor body.

[0038] In some embodiments, Figures 3 to 6 As shown, a limiting wheel is provided on the first side of the bottom of the first roller group, and the limiting wheel is clamped on the track. Two groups of guide wheels are provided on the top of the first roller group, and the guide wheels move along the belt storage rack.

[0039] Specifically, the bottom of the first roller group can be supported by four wheels, the cross section of the limiting wheel on the first side is in the shape of a dovetail groove, the limiting wheel is installed on the track to play a travel limit role, and the cross section of the wheel on the other side is rectangular. The two sets of guide wheels on the top of the first roller group run along the inner side of the upper beam of the storage rack to prevent the sliding roller from tipping over or overturning when moving.

[0040] In some embodiments, Figure 12 to Figure 14As shown, the automatic unit fuselage installation device includes a transport vehicle and a push cylinder group, and the push cylinder group fixes the unit fuselage and pushes another unit fuselage to be connected with the unit fuselage.

[0041] Specifically, the automatic unit body installation device is located in the transition section between the unloading transmission part and the unit body. The main body of the automatic unit body installation device has front and rear legs to support the unit body longitudinal beam, the bearing roller group, the upper belt and the material to ensure the normal operation of the conveyor. The redirection rollers on the legs can change the transportation route of the lower belt and reserve space for the transport vehicle.

[0042] In some embodiments, Figure 12 to Figure 14 As shown, the pushing cylinder group includes a pushing main cylinder, a front pushing group and a rear pushing group. The pushing main cylinder pushes the transport vehicle to the bottom of the conveyor body, the front pushing group fixes the unit body, and the rear pushing group drives another unit body to complete the fixing of the unit body.

[0043] Specifically, the main push cylinder pushes the transport vehicle to the bottom of the conveyor body. When installing the unit body, the operator places the unit body on the transport vehicle. The placement position of the added unit body is controlled by controlling the formation of the main push cylinder. The transport vehicle is provided with a support cylinder to support the unit body. The support cylinder on the transport vehicle is retracted to place the unit body on the track, and the support cylinder is retracted to the minimum. The unit body is detached, and the main push cylinder is withdrawn to drive the transport vehicle back to the original position, clearing the moving path of the unit body. The push cylinder group also includes a lower roller lifting cylinder. The lower roller lifting cylinder pushes the lower roller to the specified position. When the lower roller bracket of the unit body reaches the specified position, the lower roller is inserted into the roller slot along the slide groove to complete the installation of the lower roller, and the lower roller lifting cylinder returns to the initial position. The cylinders of the push cylinder group can share a set of working pump stations and control boxes. A detection device is set at the front end of the unit body to detect the position of the unit body. When the unit body leaves the detection range, the cylinder action is automatically started to complete the installation of the unit body, thereby achieving the effect of intelligent and automatic increase of the unit body. There is no need for operating workers to observe the installation of the unit body on site for a long time, thereby reducing labor costs.

[0044] In some embodiments, Figure 12 to Figure 14 As shown, the front push group presses the tail of the unit body through the pressing plate to fix the unit body, and the rear push group drives another unit body to be fixed to the unit body through the clamping slot.

[0045] Specifically, after the front push group is turned on, a pressure plate is set at the front end of the oil cylinder of the front push group, and the pressure plate presses the tail of the unit body to fix the unit body. The oil cylinder of the rear push group is turned on, and a slot is set at the front end of the oil cylinder, which is used to clamp the tail of another added unit body and push the first end of the added unit body to contact the second end of the unit body fixed by the front push group. The second end of the unit body is connected and fixed to the first end of the added unit body, and the adjacent unit bodies form a stable connection. The oil cylinder of the rear push group retreats, and the oil cylinder of the front push group is released, and the installation of the unit body is completed. The pressure plate of the oil cylinder of the front push group keeps in contact with the unit body when the conveyor is running, which can prevent the unit body from swinging when the tunnel boring machine is towing and transporting. The pressure plate can leave the unit body when the unit body moves forward.

[0046] In some embodiments, Figures 16 to 18 As shown, a redirecting roller is provided at the first end of the tail receiving part, a fixing piece is provided at the second end of the tail receiving part, and the rotating mechanism is located at the lower part of the first end of the tail receiving part.

[0047] Specifically, the redirecting roller at the first end of the tail material receiving part is used to change the direction of the conveyor belt. The fixing part at the second end of the tail material receiving part includes an elastic retaining spring and a pin shaft hole. A pair of elastic retaining springs are arranged at the pin shaft hole to form elastic self-locking, which is convenient for the tail material receiving part to be connected with the first end of the unit fuselage. The rotating mechanism includes a centripetal push-off ball bearing. The centripetal push-off ball bearing can bear loads in both axial and radial directions. When the tunnel boring machine swings horizontally, the centripetal push-off ball bearing can avoid affecting the straight line operation of the conveyor. When passing through an uneven tunnel, the rotation of the centripetal push-off ball bearing can play a certain regulating role, thereby minimizing the influence of external factors on the operation of the conveyor.

[0048] In some embodiments, Fig.15 As shown, a pin hook is provided at the first end of the unit body, and a fixing piece is provided at the second end of the unit body. The pin hook is fixed in cooperation with a fixing piece of a tail receiving portion or another unit body.

[0049] The cam is provided with a plurality of rollers, each of which is provided with a plurality of rollers, and the plurality of rollers are provided with rollers for preventing the belt from running away from the guide rails. The plurality of rollers are provided with rollers for preventing the belt from running away from the guide rails. The plurality of rollers are provided with rollers for preventing the belt from running away from the guide rails. The plurality of rollers are provided with rollers for preventing the belt from running away from the guide rails. The plurality of rollers are provided with rollers for preventing the belt from running away from the guide rails. The pin hook includes a first pin and a second pin, the first pin and the second pin are fixedly connected through a connecting plate, the first pin is connected to the second end of the I-beam, and the distance between the second pin and the second end of the I-beam is greater than or equal to the distance of the second pin penetrating into the fixing of the adjacent mobile unit fuselage. The unit fuselage forms a modular structure of 3 meters, and four walking wheels are arranged on the front and rear sides of the unit fuselage to support walking, and can move longitudinally under external traction. The unit fuselage roller frame and the support beam are connected by quick-release E-type pins, which are convenient and quick to disassemble and assemble.

[0050] In some embodiments, Figures 7 to 9 As shown, the unwinding device includes a support frame and running wheels, and the support frame approaches and moves away from the conveyor belt along the track through the running wheels.

[0051] Specifically, the unwinding device is arranged at one end of the belt storage bin away from the variable frequency tensioning device. The unwinding device moves along the track driven by the driving device through the running wheels. When the belt storage bin needs to rewind the tape after releasing the tape, the tape roll is placed on the unwinding device support frame and pushed along the track to the top of the conveyor belt. The closed-loop joint of the conveyor belt laid on the conveyor is opened to connect the new tape. The variable frequency winch is started to pull the sliding roller group, and the whole roll of conveyor belt is stored in the belt storage bin. Then, the tape joint is connected to form a closed loop. After the unwinding device unwinds the tape, it is fixed to the support frame with a steel wire rope. The track and support legs laid outside the lane can be folded and placed along the track hinge point without affecting the passage of the lane.

[0052] In the description of the present invention, it is to be understood that the terms “center”, “longitudinal”, “lateral”, “length”, “width”, “thickness”, “up”, “down”, “front”, “back”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inside”, “outside”, “clockwise”, “counterclockwise”, “axial”, “radial”, “circumferential”, etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0053] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0054] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0055] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0056] In the present invention, the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. mean 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 invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the described specific features, structures, materials or characteristics may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0057] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are illustrative and are not to be construed as limitations on the present invention. Changes, modifications, substitutions and variations of the above embodiments by those of ordinary skill in the art are all within the scope of protection of the present invention.

Claims

1. A self-following retractable belt conveyor for cutting holes, characterized in that: include: Discharge transmission part; A tape storage bin, the tape storage bin is located at the first end of the unloading transmission part, a sliding frame, a tape storage bin frame and a frequency conversion tensioning device are arranged in the tape storage bin, the sliding frame can slide in the tape storage bin, a first roller group is arranged on the sliding frame, a second roller group is arranged on the tape storage bin frame, and the frequency conversion tensioning device is arranged in the tape storage bin and connected with the first roller group to drive the first roller group to move; A belt unwinding device, the belt unwinding device is located between the belt storage bin and the unloading transmission part and is used to store a whole roll of conveyor belt; A tail receiving part, the tail receiving part is connected to the tunneling machine through a rotating mechanism, a redirecting roller is provided at the first end of the tail receiving part, a fixing piece is provided at the second end of the tail receiving part, and the rotating mechanism is located at the lower part of the first end of the tail receiving part; A unit fuselage, wherein a first end of the unit fuselage is connected to the tail material receiving portion; An automatic unit body installation device, the automatic unit body installation device is located between the unloading transmission part and the unit body, the automatic unit body installation device moves another unit body to the second end of the unit body and fixes it, the automatic unit body installation device includes a transport vehicle and a push cylinder group, the push cylinder group includes a push main cylinder, a front push group and a rear push group, the push main cylinder pushes the transport vehicle to the bottom of the conveyor body, the front push group presses the tail of the unit body through a pressure plate to fix the unit body, and the rear push group drives another unit body to be fixed to the unit body through a slot; A conveyor belt passes through the lower part of the conveyor body and is wound around the variable frequency tensioning device, the belt storage bin, and the tail receiving part to form a closed loop.

2. The self-following retractable belt conveyor for cutting holes according to claim 1 is characterized in that: The unloading transmission part comprises an unloading roller and a backstop.

3. The self-following retractable belt conveyor for cutting holes according to claim 1, characterized in that: The variable frequency tensioning device comprises a variable frequency winch and a driving motor. The driving motor is connected to the variable frequency winch by transmission. The variable frequency winch pulls the first roller group to move along the track of the belt storage rack.

4. The self-following retractable belt conveyor for cutting holes according to claim 3 is characterized in that: A limiting wheel is provided on a first side of the bottom of the first roller group, and the limiting wheel is clamped on the track. Two groups of guide wheels are provided on the top of the first roller group, and the guide wheels move along the tape storage rack.

5. The self-following retractable belt conveyor for cutting holes according to claim 1, characterized in that: A pin hook is provided at the first end of the unit fuselage, and a fixing piece is provided at the second end of the unit fuselage. The pin hook is fixed in cooperation with the fixing piece of the tail receiving part or another unit fuselage.

6. The self-following retractable belt conveyor for cutting holes according to claim 1, characterized in that: The belt unwinding device comprises a support frame and running wheels, and the support frame approaches and moves away from the conveyor belt along a track via the running wheels.

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