Transition belt conveyor and method for continuously tunneling roadway turning opening by using same

Abstract

The invention discloses a transition belt conveyor and a method for continuously tunneling a roadway turning opening by using the transition belt conveyor, and belongs to the technical field of roadway tunneling. The invention aims to provide a transition belt conveyor capable of realizing continuous coal output and a method for continuously tunneling a turning opening of a roadway by using the transition belt conveyor. According to the technical scheme, in the transition belt conveyor, a driving roller is installed at one end of a first bearing frame, a turnabout roller is installed at one end of a second bearing frame, one or more sections of middle bearing frames are detachably installed between the first bearing frame and the second bearing frame through connecting pin devices, and a belt bypasses the driving roller and the turnabout roller. The support is supported by the first bearing frame and the second bearing frame. According to the continuous tunneling method for the turning opening of the roadway, after the turning opening is tunneled to a carrying slope of a reversed loader, the carrying slope is relieved by detaching the middle section of the reversed loader, then a transition belt conveyor is additionally arranged between the reversed loader and a belt conveyor, and continuous coal output is guaranteed. The method is suitable for coal mine tunnel turning opening construction.

Description

Technical Field

[0001] A transition belt conveyor and a method for continuous tunneling at the turning and opening of a roadway using the same according to the present invention belong to the technical field of roadway tunneling. Background Art

[0002] Each time a roadway is turned and opened, a major problem is faced. After the machine turns and opens to the point where the transfer machine supports the side, production cannot continue. Even when the transfer machine swings to the maximum extent, usually only about 20 - 25 meters can be tunnelled, and this distance does not meet the requirement of the shortest distance for installing the belt (35 - 45m). Usually, when the transfer machine cannot continue production with the maximum swing, the transfer machine belt needs to be placed on the ground. After the machine shovels the gangue, it is dumped onto the transfer machine belt, or a forklift cooperates with the machine to transfer the coal (gangue) onto the transfer machine belt. In this way, a continuous coal (gangue) output system cannot be achieved, affecting the tunneling efficiency. When the machine discharges coal (gangue) backward, a large amount of floating coal (gangue) will accumulate at the coal (gangue) dropping point, which often affects the roadway standardization and increases the workload of manual cleaning. Therefore, how to be able to continuously discharge coal (gangue) during turning and opening so that tunneling can be continuous and efficient is an urgent problem to be solved in roadway tunneling construction. Summary of the Invention

[0003] Aiming at the deficiencies of the prior art, the purpose of the present invention is to provide a transition belt conveyor capable of realizing continuous coal discharge and a method for continuous tunneling at the turning and opening of a roadway using the same.

[0004] To achieve the above purpose, the present invention adopts the following technical solutions. A transition belt conveyor includes a first support frame, a second support frame, a driving roller, a deflecting roller, and a belt. One end of the first support frame is installed with a driving roller, one end of the second support frame is installed with a deflecting roller, the first support frame and the second support frame are detachably connected by a connecting pin device, and the belt bypasses the driving roller and the deflecting roller and is supported by the first support frame and the second support frame;

[0005] The first support frame includes a first support beam, a first support seat, a first upper idler, and a first lower idler. Two first support beams are arranged in parallel and are each supported by a first support seat. A plurality of groups of first upper idlers are installed between the two first support beams. The two first support seats are fixed into a whole by two first connecting beams, and a first lower idler is installed between the two first support seats;

[0006] The second support frame includes a second support beam, a second support seat, a second upper idler, and a second lower idler. Two second support beams are arranged in parallel and are each supported by a second support seat. A plurality of groups of second upper idlers are installed between the two second support beams. The two second support seats are fixed into a whole by two second connecting beams, and a second lower idler is installed between the two second support seats.

[0007] The intermediate conveyor belt of the present invention further includes an intermediate support frame, and one or more intermediate support frames are detachably installed between the first support frame and the second support frame through a connecting pin device;

[0008] The intermediate support frame includes an intermediate support beam, intermediate support seats, intermediate upper idlers and intermediate lower idlers. Two intermediate support beams are arranged in parallel and are each supported by an intermediate support seat. A plurality of groups of intermediate upper idlers are installed between the two intermediate support beams. The two intermediate support seats are fixed into a whole by two intermediate connecting beams, and an intermediate lower idler is installed between the two intermediate support seats.

[0009] The connecting pin device includes connecting plates, a pin shaft and a locking plate. Two connecting plates are arranged oppositely and are each provided with a through hole. The pin shaft passes through the two connecting plates, and the locking plate is snapped into a groove on the pin shaft. The locking plate is fastened to the connecting plate by screws;

[0010] The first support beam, the intermediate support beam and the second support beam are all I-beams. One end of the first support beam is connected to one end of the intermediate support beam. A through hole is opened on the web of the intermediate support beam. One end of the connecting pin device is clamped on both sides of the web of the intermediate support beam and is detachably connected through the pin shaft. The other end of the connecting pin device is clamped on both sides of the web of the first support beam and is welded and fixed together. The other end of the intermediate support beam is connected to one end of the second support beam. A through hole is opened on the web of the second support beam. One end of the connecting pin device is clamped on both sides of the web of the second support beam and is detachably connected through the pin shaft. The other end of the connecting pin device is clamped on both sides of the web of the intermediate support beam and is welded and fixed together.

[0011] Four reinforcing pads are further arranged between the two connecting plates and are respectively welded on both sides of the webs at the joints of the two support beams.

[0012] A rectangular sealing plate is fixed at one end of the first support beam away from the connecting pin device and is flat against the end face. A plurality of through holes are opened on the sealing plate. A connecting plate is fixed on the sealing plate by bolts, and a mounting seat is vertically fixed on the connecting plate. The end of the driving roller is rotatably installed on the mounting seat;

[0013] The mounting seat is an I-beam with a groove opened on the web.

[0014] One end of each of the two second support seats extends beyond the ends of the two second support beams, and a support is fixed on the extended part. Both ends of the redirecting roller are rotatably installed on the two supports.

[0015] The driving roller is an electric roller.

[0016] A method for continuous tunneling at a roadway turning opening of the present invention includes the following steps:

[0017] Step 1: The roadheader advances, and the loader is used in conjunction with the belt conveyor to discharge coal. After reaching the turning and opening point of the roadway, the roadheader retreats 5 - 10 m, the cutting part cuts in obliquely, and cornering construction is carried out. The loader swings within the allowable range and cooperates with the belt conveyor to discharge coal;

[0018] Step 2: After the loader supports the sidewall, the intermediate sections of the loader are disassembled one by one to shorten the length of the loader and adjust its position, and the roadheader continues to advance;

[0019] Step 3: When the advancing distance after turning reaches 20 - 26 m, an intermediate belt conveyor is installed between the loader and the belt conveyor, and the loader cooperates with the intermediate belt conveyor and the belt conveyor to discharge coal;

[0020] Step 4: As the roadheader advances, the intermediate belt conveyor is lengthened by adding intermediate support frames to ensure effective connection between the loader and the belt conveyor;

[0021] Step 5: When the advancing distance of the roadheader after turning reaches 35 - 45 m and meets the installation requirements of the belt conveyor, a new belt conveyor is installed in the roadway after turning to connect the belt conveyor in the original roadway and cooperate with the loader to discharge coal.

[0022] During the tunneling processes of Step 1, Step 2, Step 3, Step 4, and Step 5, support is carried out simultaneously.

[0023] The work of disassembling the intermediate sections of the loader in Step 2 and the work of adding intermediate support frames to the intermediate belt conveyor in Step 3 are both completed during the daily maintenance.

[0024] Compared with the prior art, the present invention has the following beneficial effects.

[0025] 1. In the present invention, the intermediate belt conveyor is simple to manufacture and convenient to install. It can effectively connect the loader and the belt conveyor when the advancing distance after turning is limited, forming continuous coal discharge, thus realizing continuous tunneling at the turning and opening of the roadway.

[0026] 2. In the present invention, the intermediate support frames of the intermediate belt conveyor can be increased, so that the intermediate belt conveyor can be lengthened. And the process only requires removing the bolt connection between the intermediate support frame and the second support frame, moving the second support frame, adding the intermediate support frame and then connecting with bolts, which is simple and convenient to operate. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required to be used in the embodiments.

[0028] Figure 1 It is a schematic structural diagram of the first embodiment of the intermediate belt conveyor in the present invention.

[0029] Figure 2 ForFigure 1 Schematic structural diagram of the intermediate belt conveyor after removing the belt.

[0030] Figure 3 This is the schematic structural diagram of the second embodiment of the intermediate belt conveyor in the present invention.

[0031] Figure 4 It is Figure 3 Schematic structural diagram of the intermediate belt conveyor after removing the belt.

[0032] Figure 5 It is Figure 2 Local enlarged view at position A in the figure.

[0033] Figure 6 Schematic structural diagram of the connecting pin device.

[0034] Figure 7 Schematic diagram of the connection between the first support beam and the intermediate support beam.

[0035] Figure 8 Schematic diagram of the connection between the intermediate support beam and the second support beam.

[0036] Figure 9 Schematic diagram when the transfer machine first supports the side during tunneling.

[0037] Figure 10 Schematic diagram of relieving the side support by shortening the transfer machine.

[0038] Figure 11 Schematic diagram of using an intermediate belt conveyor to connect the transfer machine and the belt conveyor.

[0039] Figure 12 Schematic diagram of the intermediate belt conveyor after being lengthened and connecting the transfer machine and the belt conveyor.

[0040] Figure 13 Schematic diagram of normal tunneling after the tunneling distance is sufficient to install the belt conveyor.

[0041] In the figure: 1 is the first carrying frame, 11 is the first support beam, 12 is the first support seat, 13 is the first upper idler, 14 is the first lower idler, 15 is the sealing plate, 16 is the connecting plate, 17 is the mounting seat, 2 is the intermediate carrying frame, 21 is the intermediate support beam, 22 is the intermediate support seat, 23 is the intermediate upper idler, 24 is the intermediate lower idler, 3 is the second carrying frame, 31 is the second support beam, 32 is the second support seat, 33 is the second upper idler, 34 is the second lower idler, 35 is the support, 4 is the driving drum, 5 is the deflecting drum, 6 is the belt, 7 is the connecting pin device, 71 is the connecting plate, 72 is the pin shaft, 73 is the locking plate, 74 is the reinforcing pad, 10 is the roadheader, 20 is the transfer machine, 30 is the belt conveyor, and 40 is the intermediate belt conveyor. Detailed implementation manners

[0042] Combined with the accompanying drawings below, the technical solutions in the present invention will be clearly and completely described. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all embodiments. Based on the embodiments of the present invention, all other implementation manners obtained by those of ordinary skill in the art without creative labor belong to the scope protected by the present invention.

[0043] The present invention provides the following embodiments.

[0044] Embodiment 1

[0045] As Figure 1 、 Figure 2 shown, a transition belt conveyor of the present invention includes a first carrying rack 1, a second carrying rack 3, a driving roller 4, a redirecting roller 5 and a belt 6; a driving roller 4 is installed at one end of the first carrying rack 1, a redirecting roller 5 is installed at one end of the second carrying rack 3, the first carrying rack 1 and the second carrying rack 3 are detachably connected by a connecting pin device 7, and the belt 6 bypasses the driving roller 4 and the redirecting roller 5 and is supported by the first carrying rack 1 and the second carrying rack 3;

[0046] The first carrying rack 1 includes a first support beam 11, a first support seat 12, a first upper idler 13 and a first lower idler 14. Two first support beams 11 are arranged in parallel and are each supported by a first support seat 12. A plurality of groups of first upper idlers 13 are installed between the two first support beams 11. The two first support seats 12 are fixed into a whole by two first connecting beams, and a first lower idler 14 is installed between the two first support seats 12;

[0047] The second carrying rack 3 includes a second support beam 31, a second support seat 32, a second upper idler 33 and a second lower idler 34. Two second support beams 31 are arranged in parallel and are each supported by a second support seat 32. A plurality of groups of second upper idlers 33 are installed between the two second support beams 31. The two second support seats 32 are fixed into a whole by two second connecting beams, and a second lower idler 34 is installed between the two second support seats 32.

[0048] As Figure 6 shown, the connecting pin device 7 includes a connecting plate 71, a pin shaft 72 and a locking plate 73. Two connecting plates 71 are arranged opposite to each other and are both provided with through holes. The pin shaft 72 passes through the two connecting plates 71, and the locking plate 73 is snapped into the groove on the pin shaft 72. The locking plate 73 is fastened to the connecting plate 71 by screws;

[0049] The first support beam 11 and the second support beam 31 are both I-shaped steel beams. One end of the first support beam 11 is connected to one end of the second support beam 31. A through hole is formed in the web of the second support beam 31. One end of the connecting pin device 7 is clamped on both sides of the web of the second support beam 31 and is detachably connected through a pin shaft 72. The other end of the connecting pin device 7 is clamped on both sides of the web of the first support beam 11 and is welded and fixed together.

[0050] Four reinforcing backing plates 74 are further arranged between the two connecting plates 71. The four reinforcing backing plates 74 are respectively welded on both sides of the webs at the joint of the two support beams.

[0051] As Figure 5 shown, a rectangular sealing plate 15 is fixed at one end of the first support beam 11 away from the connecting pin device 7 and is flat against the end face. A plurality of through holes are formed in the sealing plate 15. A connecting plate 16 is fixed on the sealing plate 15 through bolts. A mounting seat 17 is vertically fixed on the connecting plate 16. The end of the driving roller 4 is rotatably mounted on the mounting seat 17.

[0052] The mounting seat 9 is an I-shaped steel with a groove in the web.

[0053] One end of each of the two second support seats 32 extends beyond the ends of the two second support beams 31. A support 35 is fixed on the extended part. Both ends of the redirecting roller 5 are rotatably mounted on the two supports 35.

[0054] The driving roller 4 is an electric roller. The electric roller integrates the motor and the reducer inside the roller body, and has many advantages such as compact structure, high transmission efficiency, low noise, long service life, stable operation, reliable work, good sealing performance, small occupied space, and convenient installation, and is suitable for use in coal mines.

[0055] The top of the first support seat 12 is detachably connected to the bottom of the first support beam 11 through bolts. The top of the second support seat 32 is detachably connected to the bottom of the second support beam 31 through bolts.

[0056] Embodiment 2

[0057] As Figure 3 、 Figure 4 shown, a transition belt conveyor of the present invention includes a first carrying frame 1, an intermediate carrying frame ②, a second carrying frame 3, a driving roller 4, a redirecting roller 5, and a belt 6. A driving roller 4 is installed at one end of the first carrying frame 1. A redirecting roller 5 is installed at one end of the second carrying frame 3. One or more intermediate carrying frames 2 are detachably installed between the first carrying frame 1 and the second carrying frame 3 through a connecting pin device 7. The belt 6 bypasses the driving roller 4 and the redirecting roller 5 and is supported by the first carrying frame 1 and the second carrying frame 3.

[0058] The first carrier 1 includes a first support beam 11, a first support base 12, a first upper idler 13 and a first lower idler 14. Two first support beams 11 are arranged in parallel and are each supported by a first support base 12. A plurality of groups of first upper idlers 13 are installed between the two first support beams 11. Two first support bases 12 are fixed as a whole by two first connecting beams, and a first lower idler 14 is installed between the two first support bases 12;

[0059] The middle carrier 2 includes a middle support beam 21, a middle support base 22, a middle upper idler 23 and a middle lower idler 24. Two middle support beams 21 are arranged in parallel and are each supported by a middle support base 22. A plurality of groups of middle upper idlers 23 are installed between the two middle support beams 21. Two middle support bases 22 are fixed as a whole by two middle connecting beams, and a middle lower idler 24 is installed between the two middle support bases 22;

[0060] The second carrier 3 includes a second support beam 31, a second support base 32, a second upper idler 33 and a second lower idler 34. Two second support beams 31 are arranged in parallel and are each supported by a second support base 32. A plurality of groups of second upper idlers 33 are installed between the two second support beams 31. Two second support bases 32 are fixed as a whole by two second connecting beams, and a second lower idler 34 is installed between the two second support bases 32.

[0061] As Figure 6 shown, the connecting pin device 7 includes a connecting plate 71, a pin shaft 72 and a locking plate 73. Two connecting plates 71 are arranged opposite to each other and are both provided with through holes. The pin shaft 72 passes through the two connecting plates 71, and the locking plate 73 is snapped into the groove on the pin shaft 72. The locking plate 73 is fastened to the connecting plate 71 by screws;

[0062] As Figure 7 、 Figure 8 shown, the first support beam 11, the middle support beam 21 and the second support beam 31 are all I-beams. One end of the first support beam 11 is connected to one end of the middle support beam 21. A through hole is opened on the web of the middle support beam 21. One end of the connecting pin device 7 is clamped on both sides of the web of the middle support beam 21 and is detachably connected by the pin shaft 72. The other end of the connecting pin device 7 is clamped on both sides of the web of the first support beam 11 and is welded and fixed together. One end of the middle support beam 21 is connected to one end of the second support beam 31. A through hole is opened on the web of the second support beam 31. One end of the connecting pin device 7 is clamped on both sides of the web of the second support beam 31 and is detachably connected by the pin shaft 72. The other end of the connecting pin device 7 is clamped on both sides of the web of the middle support beam 21 and is welded and fixed together.

[0063] Four reinforcing pads 74 are further arranged between the two connecting plates 71, and the four reinforcing pads 74 are respectively welded to both sides of the two webs at the joint of the two support beams.

[0064] In the connecting pin device 7 of the present invention, two connecting plates 71 and two reinforcing pads 74 are welded and fixed to both sides of the web of a support beam to be connected. The other two reinforcing pads 74 are welded and fixed to both sides of the web of another support beam to be connected and inserted between the two connecting plates 74. After the pin shaft passes through the connecting plates 71, the reinforcing pads 74 and the web of the support beam, it is locked by the locking plate 73 and the screw, and the two support beams can be detachably connected. All the connecting pin devices 7 in the present invention have the same size and are universal. For example, the connecting plate 71 at the end of the first support beam 11 can be inserted into and connected by the pin shaft 72 with the reinforcing pad 74 at the end of the second support beam 31 or different intermediate support beams 21. The reinforcing pad 74 at the end of the second support beam 31 can be inserted into and connected by the pin shaft 72 with the connecting plate 71 at the end of the first support beam 11 or different intermediate support beams 21.

[0065] A rectangular sealing plate 15 is fixed to one end of the first support beam 11 away from the connecting pin device 7 and is flat against the end face. A plurality of through holes are opened on the sealing plate 15. A connecting plate 16 is fixed to the sealing plate 15 by bolts. The mounting seat 17 is vertically fixed to the connecting plate 16, and the end of the driving roller 4 is rotatably mounted on the mounting seat 17.

[0066] The mounting seat 9 is an I-beam with a groove on the web.

[0067] One end of each of the two second support seats 32 extends beyond the ends of the two second support beams 31, and a support 35 is fixed to the extended part. Both ends of the redirecting roller 5 are rotatably mounted on the two supports 35.

[0068] The driving roller 4 is an electric roller.

[0069] The top of the first support seat 12 is detachably connected to the bottom of the first support beam 11 by bolts. The top of the intermediate support seat 22 is detachably connected to the bottom of the intermediate support beam 21 by bolts. The top of the second support seat 32 is detachably connected to the bottom of the second support beam 31 by bolts.

[0070] As described in the above Embodiment 1 and Embodiment 2, the transition belt conveyor of the present invention is designed in a multi-section manner, and the overall length is increased by increasing the number of intermediate bearing frames 2. The shortest length is to directly connect the first bearing frame 1 and the second bearing frame 3 in Embodiment 1. Generally, the length of one section of the bearing frame is about 3m.

[0071] In a transition belt conveyor of the present invention, a driving roller 4 is arranged above a belt conveyor 30 in a gate roadway, a redirecting roller 5 faces a roadheader 10, one end of a transfer conveyor 20 is connected to the roadheader 10, and one end of the transfer conveyor 20 is lapped on the transition belt conveyor 40 of the present invention.

[0072] When the transition belt conveyor of the present invention needs to be lengthened, disconnect the second support beam 31 in the second support frame 3 from the first support beam 11 or the middle support beam 21, move the second support frame 3 in the direction of the roadheader 7, add one or more new middle support frames 2 and detachably connect them through a connecting pin device 7. Of course, during the lengthening process, the belt 6 also needs to be lengthened, and the method for lengthening the belt 6 is well-known to those skilled in the art.

[0073] A method for continuous tunneling at a roadway turning opening of the present invention includes the following steps:

[0074] Step 1: The roadheader 10 tunnels, and the transfer conveyor 20 is used to cooperate with the belt conveyor to discharge coal. After reaching the roadway turning opening point, the roadheader 10 retreats 5 - 10 m, the cutting part performs oblique cutting to enter the knife, and chamfering construction is carried out. The transfer conveyor 20 swings within the allowable range and cooperates with the belt conveyor 30 to discharge coal; as Figure 9 shown, from the start of turning tunneling to the first time the transfer conveyor 20 supports the side, about 12 m can be tunneled.

[0075] Step 2: After the transfer conveyor 20 supports the side, successively disassemble the middle sections of the transfer conveyor 20 to shorten the length of the transfer conveyor 20 and adjust its position, and the roadheader 10 continues to tunnel; after the length of the transfer conveyor 20 becomes shorter, the situation of it supporting the side can be alleviated. As Figure 10 shown, after adjusting the shortened transfer conveyor 20 to a position where it does not support the side, it can continuously transport coal for a certain distance along with the tunneling of the roadheader 10.

[0076] Step 3: When the tunneling distance after turning reaches 20 - 26 m, install a transition belt conveyor 40 between the transfer conveyor 20 and the belt conveyor 30, and the transfer conveyor 20 cooperates with the transition belt conveyor 40 and the belt conveyor 30 to discharge coal; as Figure 11 shown. The condition for installing the transition belt conveyor 40 is that the tunneling distance reaches: roadheader length 12 m + shortest length of the transition belt conveyor 6 m + length of the support drill rig 6 m = 24 m. Since the equipment used in different construction faces is different, this distance is determined according to the actual situation.

[0077] Step 4: Along with the tunneling of the roadheader 10, the transition belt conveyor 40 is lengthened by adding middle support frames 2 to ensure effective connection between the transfer conveyor 20 and the belt conveyor 30; as Figure 12 shown.

[0078] Step Five: When the tunneling distance of the roadheader 10 reaches 35 - 45 meters after turning and meets the installation requirements of the belt conveyor 30, install a new belt conveyor 30 in the roadway after turning to connect the belt conveyor 30 in the original roadway, and cooperate with the loader 20 to discharge coal. As Figure 13 shown.

[0079] During the tunneling processes of the above-mentioned Step One, Step Two, Step Three, Step Four, and Step Five, support is carried out simultaneously.

[0080] The work of disassembling the middle section of the loader 20 in Step Two and the work of adding the middle support frame 2 to the transition belt conveyor 40 in Step Three are both completed during the daily maintenance.

[0081] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by those skilled in the art within the technical scope disclosed by the present invention should be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention should be subject to the protection scope of the claims.

Claims

1. A transition belt conveyor, characterized in that: It includes a first carrier frame (1), a second carrier frame (3), a driving roller (4), a deflecting roller (5) and a belt (6); one end of the first carrier frame (1) is installed with the driving roller (4), one end of the second carrier frame (3) is installed with the deflecting roller (5), the first carrier frame (1) and the second carrier frame (3) are detachably connected by a connecting pin device (7), and the belt (6) bypasses the driving roller (4) and the deflecting roller (5) and is supported by the first carrier frame (1) and the second carrier frame (3). The first carrier frame (1) includes a first support beam (11), a first support seat (12), a first upper idler (13) and a first lower idler (14). Two first support beams (11) are arranged in parallel and are each supported by a first support seat (12). A plurality of groups of first upper idlers (13) are installed between the two first support beams (11). The two first support seats (12) are fixed into a whole by two first connecting beams, and a first lower idler (14) is installed between the two first support seats (12). The second carrier frame (3) includes a second support beam (31), a second support seat (32), a second upper idler (33) and a second lower idler (34). Two second support beams (31) are arranged in parallel and are each supported by a second support seat (32). A plurality of groups of second upper idlers (33) are installed between the two second support beams (31). The two second support seats (32) are fixed into a whole by two second connecting beams, and a second lower idler (34) is installed between the two second support seats (32).

2. The transitional belt conveyor according to claim 1, wherein: It further includes an intermediate carrier frame (2). One or more sections of the intermediate carrier frame (2) are detachably installed between the first carrier frame (1) and the second carrier frame (3) by the connecting pin device (7). The intermediate carrier frame (2) includes an intermediate support beam (21), an intermediate support seat (22), an intermediate upper idler (23) and an intermediate lower idler (24). Two intermediate support beams (21) are arranged in parallel and are each supported by an intermediate support seat (22). A plurality of groups of intermediate upper idlers (23) are installed between the two intermediate support beams (21). The two intermediate support seats (22) are fixed into a whole by two intermediate connecting beams, and an intermediate lower idler (24) is installed between the two intermediate support seats (22).

3. The transitional belt conveyor according to claim 2, wherein: The connecting pin device (7) includes a connecting plate (71), a pin shaft (72) and a locking plate (73). Two connecting plates (71) are arranged oppositely and are each provided with a through hole. The pin shaft (72) passes through the two connecting plates (71), the locking plate (73) is snapped into the groove on the pin shaft (72), and the locking plate (73) is fastened to the connecting plate (71) by a screw. The first support beam (11), the intermediate support beam (21), and the second support beam (31) are all I-shaped steel beams. One end of the first support beam (11) is connected to one end of the intermediate support beam (21). A through hole is formed in the web of the intermediate support beam (21). One end of the connecting pin device (7) is clamped on both sides of the web of the intermediate support beam (21) and is detachably connected by a pin shaft (72). The other end of the connecting pin device (7) is clamped on both sides of the web of the first support beam (11) and is welded and fixed together. The other end of the intermediate support beam (21) is connected to one end of the second support beam (31). A through hole is formed in the web of the second support beam (31). One end of the connecting pin device (7) is clamped on both sides of the web of the second support beam (31) and is detachably connected by a pin shaft (72). The other end of the connecting pin device (7) is clamped on both sides of the web of the intermediate support beam (21) and is welded and fixed together.

4. The transitional belt conveyor according to claim 3, characterized in that: Four reinforcing pads (74) are further arranged between the two connecting plates (71). The four reinforcing pads (74) are respectively welded on both sides of the two webs at the joint of the two support beams.

5. A transition belt conveyor according to claim 1 or 2, characterized in that: One end of the first support beam (11) away from the connecting pin device (7) is fixed with a rectangular sealing plate (15) that is flat against the end face. A plurality of through holes are formed in the sealing plate (15). A connecting plate (16) is fixed on the sealing plate (15) by bolts. A mounting seat (17) is vertically fixed on the connecting plate (16). The end of the driving roller (4) is rotatably mounted on the mounting seat (17). The mounting seat (9) is an I-shaped steel with a groove in the web.

6. The transitional belt conveyor according to claim 1 or 2, characterized in that: One end of each of the two second support seats (32) extends beyond the ends of the two second support beams (31). A support (35) is fixed on the extended part. Both ends of the redirecting roller (5) are rotatably mounted on the two supports (35).

7. The transitional belt conveyor according to claim 1 or 2, characterized in that: The driving roller (4) is an electric roller.

8. A method for continuous tunneling at the turning and opening of a roadway, characterized in that It includes the following steps: Step 1: The roadheader (10) advances. The loader (20) is used in cooperation with the belt conveyor to discharge coal. After reaching the turning opening point of the roadway, the roadheader (10) retreats 5 - 10 m, the cutting part cuts in obliquely, and chamfering construction is carried out. The loader (20) swings within the allowable range and cooperates with the belt conveyor (30) to discharge coal. Step 2: After the loader (20) leans against the sidewall, the intermediate sections of the loader (20) are disassembled one by one, so that the length of the loader (20) is shortened and its position is adjusted, and the roadheader (10) continues to advance. Step 3: When the driving distance after turning reaches 20 - 26 meters, an intermediate belt conveyor (40) is installed between the loader (20) and the belt conveyor (30). The loader (20) cooperates with the intermediate belt conveyor (40) and the belt conveyor (30) to discharge coal. Step 4: As the roadheader (10) advances, the intermediate belt conveyor (40) is lengthened by adding intermediate support frames (2) to ensure effective connection between the loader (20) and the belt conveyor (30). Step 5: When the driving distance of the roadheader (10) after turning reaches 35 - 45 meters and meets the installation requirements of the belt conveyor (30), a new belt conveyor (30) is installed in the roadway after turning to connect the belt conveyor (30) in the original roadway and cooperate with the loader (20) to discharge coal.

9. A method for continuous tunneling at the turning and opening of a roadway according to claim 8, characterized in that: During the tunneling processes of Step 1, Step 2, Step 3, Step 4, and Step 5, support is carried out simultaneously.

10. A method for continuous tunneling at the turning and opening of a roadway according to claim 8, characterized in that: The work of disassembling the middle section of the transfer conveyor (20) in Step 2 and the work of adding the intermediate support frame (2) to the transition belt conveyor (40) in Step 3 are both completed during the daily maintenance.

Images