A full-face rock tunnel boring machine test bed and a method of using the same

Abstract

The application relates to the field of tunnel boring machines, and discloses a full-face rock tunnel boring machine test bed and a use method thereof. The application aims to solve the problem that the device cannot intuitively observe the slag discharge amount of a cutter head according to the rotating speed of the cutter head, so as to verify the optimal rotating speed of the tunnel boring machine, and the practicability is poor. The application is composed of a pushing tunneling mechanism and a material pushing mechanism. When the test bed and the use method thereof resist the sliding of a push rod at the edge of the lower half of a fixed block, the test bed and the use method thereof pull a deflection rod to be deflected and be perpendicular to the push rod, and at this time, the lower scraper is attached to the inner wall of a collecting pipe and slides, the stones in the collecting pipe are pushed and transported into a collecting box, so that a user can adjust the rotating speed of a crushing disc to observe the collection amount of the stones in the collecting box, and then more intuitively observe the slag discharge rate of the crushing disc and the vibration rod under different rotating speeds.

Description

Technical Field

[0001] This invention relates to the field of tunnel boring machines, specifically to a test bench for a full-face rock tunnel boring machine and its usage method. Background Technology

[0002] The cutterhead is a key component of a full-face rock tunnel boring machine (TBM), serving two basic functions: tunneling and muck removal. While extensive research has been conducted both domestically and internationally on cutterhead systems for rock breaking and tunneling, research on cutterhead muck removal is relatively scarce. The muck removal performance of the cutterhead directly affects tunneling speed, cutterhead jamming, and secondary cutter wear. Therefore, improving the muck removal performance of the cutterhead is of great significance for enhancing the tunneling performance of full-face rock TBMs and optimizing the cutterhead structure.

[0003] Existing full-face rock tunnel boring machine test benches mostly verify the muck removal efficiency of tunnel boring machines for different types of rocks by measuring the tunnel boring machine's running time and muck removal ratio. However, the devices are not convenient for observing the amount of muck removed from the cutterhead more intuitively based on the speed of the cutterhead's rotation, so as to verify the optimal rotation speed of the tunnel boring machine, and their practicality is poor. Summary of the Invention

[0004] The purpose of this invention is to provide a full-face rock tunnel boring machine test bench and its usage method, to solve the problem in the background art where the proposed device is inconvenient to observe the amount of slag discharged from the cutterhead more intuitively based on the rotation speed of the cutterhead, thus hindering the verification of the optimal rotation speed of the tunnel boring machine and resulting in poor practicality. To achieve the above objective, this invention provides the following technical solution: a full-face rock tunnel boring machine test bench, including a support platform, a fixed pipe installed on the support platform, a pushing tunneling mechanism provided on the inner wall of the fixed pipe, and a material feeding mechanism provided on the side of the pushing tunneling mechanism;

[0005] A collection pipe is provided on the outside of the pushing tunneling mechanism, and a first spring telescopic rod is connected between the inner wall of the collection pipe and the inner wall of the fixed pipe. A collection box is installed on the inner wall of the collection pipe, and the collection box is embedded in a groove opened at the end of the collection pipe.

[0006] Preferably, the pushing tunneling mechanism includes two hydraulic cylinders installed on the inner wall of a fixed pipe. A motor is fixedly connected to the ends of the two hydraulic cylinders. A connecting pipe is fixedly connected to one end of the rotating shaft of the motor. A crushing disc is fixedly connected to the end of the connecting pipe, and the crushing disc is rotatably connected to one end of the collecting pipe. A spiral blade is provided inside the crushing disc. A slot is provided on the crushing disc, and a vibrating rod is hinged in the slot. One end of the vibrating rod is beveled. A return spring telescopic rod is hinged between the side of the vibrating rod and the inner wall of the crushing disc.

[0007] An internal gear ring is rotatably connected inside the crushing disc. Three transmission gears are driven to the inner side of the internal gear ring and are distributed in a ring at equal intervals. A fixed rod is screwed to the central axis of the transmission gears. The end of the fixed rod away from the transmission gear is fixedly connected to the inner wall of the collecting pipe. Bearings are fixedly connected to the three fixed rods. A moving ring is fixedly connected to the end of the bearing and is fixed to the outer side of the internal gear ring. A protrusion is provided on the moving ring and the protrusion abuts against one end of the vibrating rod.

[0008] A central gear meshes between the three transmission gears, and the central gear is fixedly sleeved on the outside of the connecting pipe.

[0009] Preferably, the feeding mechanism includes a worm gear rotatably connected to a motor, a transmission belt sleeved on the outer side of the worm gear and the motor's rotating shaft, a worm wheel rotatably connected to the side of the worm gear, and a fixing block rotatably connected to both end faces of the worm wheel, the fixing block being fixed to the inner wall of the collecting pipe;

[0010] The outer side of the fixed block abuts against a push rod, and a limiting sleeve is fitted on the outer side of the push rod, and the limiting sleeve is fixed to the end face of the worm gear. A second spring telescopic rod is connected between the limiting sleeve and the outer side of the push rod.

[0011] Preferably, the abutting push rod is hollow, and a through groove is provided on the side of the abutting push rod. A deflecting rod is hinged to the inner wall of the through groove. A folding pull rod is hinged to one end of the deflecting rod, and the end of the folding pull rod away from the deflecting rod is fixed to the outside of the limiting sleeve.

[0012] Preferably, the deflection rod has a cut surface, and an H-shaped plate is screwed onto the cut surface of the deflection rod. Sliding blocks are slidably connected in the slots at both ends of the H-shaped plate. Scrapers are fixedly connected to the sliding blocks, and the scrapers are slidably connected in the limiting grooves opened on the surface of the deflection rod. A third spring telescopic rod is fixedly connected between the two scrapers.

[0013] Preferably, the upper edge of the fixing block is semi-circular, and the lower edge of the fixing block is U-shaped.

[0014] Preferably, the end of the connecting pipe is provided with a through groove.

[0015] Preferably, the method of using the full-face rock tunnel boring machine test bench includes the following steps:

[0016] S1: The user places the experimental stone at the end of the crushing disc and fixes it. Then, after fixing the support platform, the motor is started. The motor and the connecting pipe at its end drive the crushing disc to rotate counterclockwise. Then, the hydraulic cylinder slowly extends to make the crushing disc contact the stone, so that the crushing disc crushes the stone. The crushed stone is then transported into the collection pipe through the spiral blade.

[0017] S2: When the motor drives the crushing disc to rotate counterclockwise, the outer center gear rotates clockwise. When the center gear rotates clockwise, it drives the outer transmission gear and the inner gear ring to rotate counterclockwise synchronously. When the inner gear ring rotates counterclockwise, it drives the protrusion on it to strike one end of the vibrating rod, causing the end of the vibrating rod to vibrate, which in turn works with the crushing disc to crush the stones.

[0018] S3: Then, when the motor rotates counterclockwise, it works with the transmission belt to drive the worm to rotate, causing the worm wheel to drive the abutment push rod on it to rotate clockwise. One end of the abutment push rod slides along the surface of the fixed block under the action of the second spring telescopic rod. When the abutment push rod slides at the edge of the upper half of the fixed block, the deflection rod folds inside the abutment push rod.

[0019] When the push rod slides at the edge of the lower half of the fixed block, the edge of the lower half of the fixed block presses against the end of the push rod, causing the push rod to slide towards the edge of the worm gear. Under the action of the folding rod, the deflection rod is pulled to deflect and is perpendicular to the push rod. At this time, the scraper on the lower side is attached to the inner wall of the collection pipe and slides, pushing and conveying the stones in the collection pipe into the collection box, so as to observe the slag discharge rate of the crushing disc and the vibrating rod.

[0020] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0021] In this invention, a motor drives the crushing disc to rotate counterclockwise through a connecting pipe at its end. Then, a hydraulic cylinder slowly extends to bring the crushing disc into contact with the stone, causing the crushing disc to crush the stone. The crushed stone is then transported into a collection pipe for easy collection.

[0022] In this invention, when the motor drives the crushing disc to rotate counterclockwise, the central gear on its outer side rotates clockwise. When the central gear rotates clockwise, it drives the transmission gear and the internal gear ring on its outer side to rotate counterclockwise synchronously. When the internal gear ring rotates counterclockwise, it drives the protrusion on it to strike one end of the vibrating rod, causing the end of the vibrating rod to vibrate. This, in conjunction with the crushing disc, crushes the stones, resulting in higher crushing efficiency.

[0023] In this invention, when the motor rotates counterclockwise, it drives the worm gear to rotate in conjunction with the transmission belt, causing the worm wheel to drive the contact push rod on it to rotate clockwise. One end of the contact push rod slides along the surface of the fixed block under the action of the second spring telescopic rod. When the contact push rod slides at the edge of the lower half of the fixed block, it pulls the deflection rod to deflect it to a perpendicular state with the contact push rod. At this time, the scraper on the lower side is attached to the inner wall of the collection pipe and slides, pushing and conveying the stones in the collection pipe into the collection box. This allows the user to adjust the speed of the crushing disc to observe the amount of stones collected in the collection box, and thus more intuitively observe the slag discharge rate of the crushing disc and the vibrating rod at different speeds. Attached Figure Description

[0024] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0025] Figure 2 This is one of the partial three-dimensional structural cross-sectional views of the present invention;

[0026] Figure 3 This is a second partial three-dimensional structural cross-sectional view of the present invention;

[0027] Figure 4 This is a three-dimensional unfolded structural diagram of the connecting pipe and the crushing disc of the present invention;

[0028] Figure 5 This is a three-dimensional structural diagram of the feeding mechanism of the present invention;

[0029] Figure 6 This is a three-dimensional cross-sectional view of the abutment push rod of the present invention.

[0030] In the diagram: 1. Support platform; 2. Fixed pipe; 3. Pushing and tunneling mechanism; 31. Hydraulic cylinder; 32. Motor; 33. Connecting pipe; 34. Crushing disc; 35. Vibrating rod; 36. Return spring telescopic rod; 37. Internal gear ring; 38. Transmission gear; 39. Fixed rod; 310. Bearing; 311. Actuating ring; 312. Protrusion; 313. Central gear; 314. Spiral blade; 4. Material feeding mechanism; 41. Worm gear; 42. Transmission belt; 43. Worm wheel; 44. Fixed block; 45. Third spring telescopic rod; 46. Abutting push rod; 47. Limiting sleeve; 48. Second spring telescopic rod; 49. Through slot; 410. Deflection rod; 411. Folding pull rod; 412. H-shaped plate; 413. Sliding block; 414. Scraper; 5. Collection pipe; 6. First spring telescopic rod; 7. Collection box. Detailed Implementation

[0031] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0032] Please see Figures 1 to 6 The present invention provides a technical solution: a test bench for a full-section rock tunnel boring machine, including a support platform 1, a fixed pipe 2 installed on the support platform 1, a pushing tunneling mechanism 3 provided on the inner wall of the fixed pipe 2, and a material feeding mechanism 4 provided on the side of the pushing tunneling mechanism 3;

[0033] A collection pipe 5 is provided on the outside of the pushing tunneling mechanism 3, and a first spring telescopic rod 6 is connected between the inner wall of the collection pipe 5 and the inner wall of the fixed pipe 2. A collection box 7 is installed on the inner wall of the collection pipe 5, and the collection box 7 is embedded in the groove opened at the end of the collection pipe 5.

[0034] In this embodiment, as Figure 1 , Figure 2 , Figure 3 , Figure 4 As shown, the pushing tunneling mechanism 3 includes two hydraulic cylinders 31 installed on the inner wall of the fixed pipe 2. The ends of the two hydraulic cylinders 31 are fixedly connected to a motor 32. A connecting pipe 33 is fixedly connected to one end of the rotating shaft of the motor 32. A crushing disc 34 is fixedly connected to the end of the connecting pipe 33. The crushing disc 34 is rotatably connected to one end of the collecting pipe 5. A spiral blade 314 is provided inside the crushing disc 34. A slot is provided on the crushing disc 34. A vibrating rod 35 is hinged in the slot. One end of the vibrating rod 35 is beveled. A return spring telescopic rod 36 is hinged between the side of the vibrating rod 35 and the inner wall of the crushing disc 34.

[0035] An internal gear ring 37 is rotatably connected inside the crushing disc 34. Three transmission gears 38 are connected to the inner side of the internal gear ring 37 and are distributed in a ring at equal intervals. A fixing rod 39 is screwed onto the central axis of the transmission gear 38. The end of the fixing rod 39 away from the transmission gear 38 is fixedly connected to the inner wall of the collection pipe 5. A bearing 310 is fixedly connected to the three fixing rods 39. A deflecting ring 311 is fixedly connected to the end of the bearing 310. The deflecting ring 311 is fixed on the outer side of the internal gear ring 37. A protrusion 312 is provided on the deflecting ring 311 and the protrusion 312 abuts against one end of the vibrating rod 35.

[0036] A central gear 313 meshes between the three transmission gears 38, and the central gear 313 is fixedly sleeved on the outside of the connecting pipe 33.

[0037] In this embodiment, as Figure 2 , Figure 3 , Figure 5 , Figure 6 As shown, the feeding mechanism 4 includes a worm gear 41 rotatably connected to the motor 32. A transmission belt 42 is sleeved on the outer side of the worm gear 41 and the rotating shaft of the motor 32. A worm wheel 43 is rotatably connected to the side of the worm gear 41. Fixed blocks 44 are rotatably connected to both end faces of the worm wheel 43. The fixed blocks 44 are fixed to the inner wall of the collecting pipe 5.

[0038] The outer side of the fixed block 44 abuts against the push rod 46. The outer side of the push rod 46 is fitted with a limiting sleeve 47, and the limiting sleeve 47 is fixed on the end face of the worm gear 43. A second spring telescopic rod 48 is connected between the limiting sleeve 47 and the outer side of the push rod 46.

[0039] In this embodiment, as Figure 2 , Figure 3 , Figure 5 , Figure 6 As shown, the abutting push rod 46 is hollow, and a through groove 49 is provided on the side of the abutting push rod 46. A deflection rod 410 is hinged to the inner wall of the through groove 49. A folding pull rod 411 is hinged to one end of the deflection rod 410, and the end of the folding pull rod 411 away from the deflection rod 410 is fixed to the outside of the limiting sleeve 47.

[0040] In this embodiment, as Figure 2 , Figure 3 , Figure 5 , Figure 6 As shown, a cut surface is provided on the deflection rod 410, and an H-shaped plate 412 is screwed onto the cut surface of the deflection rod 410. Sliding blocks 413 are slidably connected in the slots at both ends of the H-shaped plate 412. A scraper 414 is fixedly connected to the sliding block 413, and the scraper 414 is slidably connected in the limiting groove provided on the surface of the deflection rod 410. A third spring telescopic rod 45 is fixedly connected between the two scrapers 414.

[0041] In this embodiment, as Figure 2 , Figure 3 , Figure 5 , Figure 6 As shown, the upper edge of the fixing block 44 is semi-circular, and the lower edge of the fixing block 44 is U-shaped.

[0042] In this embodiment, as Figure 1 , Figure 2 , Figure 3 , Figure 4 As shown, a through groove is provided at the end of the connecting pipe 33.

[0043] The method of use and advantages of this invention: The working process of this full-face rock tunnel boring machine test bench is as follows:

[0044] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 As shown:

[0045] S1: The user places the experimental stone at the end of the crushing disc 34 and fixes it. Then, after fixing the support platform 1, the motor 32 is started. The motor 32 and the connecting pipe 33 at its end drive the crushing disc 34 to rotate counterclockwise. Then, the hydraulic cylinder 31 slowly extends to make the crushing disc 34 contact the stone, so that the crushing disc 34 crushes the stone. The crushed stone is then conveyed into the collection pipe 5 through the spiral blade 314.

[0046] S2: When the motor 32 drives the crushing disc 34 to rotate counterclockwise, the outer central gear 313 rotates clockwise. When the central gear 313 rotates clockwise, it drives the outer transmission gear 38 and the inner gear ring 37 to rotate counterclockwise synchronously. When the inner gear ring 37 rotates counterclockwise, it drives the protrusion 312 on it to strike one end of the vibrating rod 35, causing the end of the vibrating rod 35 to vibrate, which works with the crushing disc 34 to crush the stone.

[0047] S3: Then, when the motor 32 rotates counterclockwise, it works with the transmission belt 42 to drive the worm 41 to rotate, causing the worm wheel 43 to drive the abutment push rod 46 on it to rotate clockwise. One end of the abutment push rod 46 slides along the surface of the fixed block 44 under the action of the second spring telescopic rod 48. When the abutment push rod 46 slides at the edge of the upper half of the fixed block 44, the deflection rod 410 folds inside the abutment push rod 46.

[0048] When the push rod 46 slides at the edge of the lower half of the fixed block 44, the edge of the lower half of the fixed block 44 presses against the end of the push rod 46, causing the push rod 46 to slide towards the edge of the worm gear 43. Under the action of the folding rod 411, the deflection rod 410 is pulled to deflect and is perpendicular to the push rod 46. At this time, the scraper 414 on the lower side is attached to the inner wall of the collection pipe 5 and slides, pushing and conveying the stones in the collection pipe 5 into the collection box 7, so that the user can adjust the speed of the crushing disc 34 to observe the amount of stones collected in the collection box 7, and thus more intuitively observe the slag discharge rate of the crushing disc 34 and the vibrating rod 35 at different speeds.

[0049] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A test bench for a full-face rock tunnel boring machine, comprising a support platform (1), characterized in that: A fixed pipe (2) is installed on the support platform (1), and a pushing tunneling mechanism (3) is provided on the inner wall of the fixed pipe (2). A material feeding mechanism (4) is provided on the side of the pushing tunneling mechanism (3). The outer side of the pushing tunneling mechanism (3) is provided with a collection pipe (5), and a first spring telescopic rod (6) is connected between the inner wall of the collection pipe (5) and the inner wall of the fixed pipe (2). A collection box (7) is installed on the inner wall of the collection pipe (5), and the collection box (7) is embedded in the groove opened at the end of the collection pipe (5). The pushing tunneling mechanism (3) includes two hydraulic cylinders (31) installed on the inner wall of the fixed pipe (2). The ends of the two hydraulic cylinders (31) are fixedly connected to a motor (32). A connecting pipe (33) is fixedly connected to one end of the rotating shaft of the motor (32). A crushing disc (34) is fixedly connected to the end of the connecting pipe (33). The crushing disc (34) is rotatably connected to one end of the collecting pipe (5). A spiral blade (314) is provided inside the crushing disc (34). A slot is provided on the crushing disc (34). A vibrating rod (35) is hinged in the slot. One end of the vibrating rod (35) is beveled. A return spring telescopic rod (36) is hinged between the side of the vibrating rod (35) and the inner wall of the crushing disc (34). The crushing disc (34) is rotatably connected to an internal gear ring (37). The inner side of the internal gear ring (37) is connected to three transmission gears (38), and the three transmission gears (38) are distributed in a ring at equal distances. A fixed rod (39) is screwed onto the central axis of the transmission gear (38). The end of the fixed rod (39) away from the transmission gear (38) is fixedly connected to the inner wall of the collection pipe (5). Bearings (310) are fixedly connected to the three fixed rods (39). A toggle ring (311) is fixedly connected to the end of the bearing (310). The toggle ring (311) is fixed on the outer side of the internal gear ring (37). A protrusion (312) is provided on the toggle ring (311), and the protrusion (312) abuts against one end of the vibrating rod (35). A central gear (313) meshes between the three transmission gears (38), and the central gear (313) is fixedly sleeved on the outside of the connecting pipe (33); The feeding mechanism (4) includes a worm (41) rotatably connected to a motor (32). A transmission belt (42) is sleeved on the outer side of the worm (41) and the rotating shaft of the motor (32). A worm wheel (43) is rotatably connected to the side of the worm (41). A fixing block (44) is rotatably connected to both end faces of the worm wheel (43). The fixing block (44) is fixed on the inner wall of the collecting pipe (5). The outer side of the fixed block (44) abuts against the push rod (46), and the outer side of the push rod (46) is fitted with a limiting sleeve (47), and the limiting sleeve (47) is fixed on the end face of the worm gear (43). A second spring telescopic rod (48) is connected between the limiting sleeve (47) and the outer side of the push rod (46).

2. The test bench for a full-face rock tunnel boring machine according to claim 1, characterized in that: The abutting push rod (46) is hollow, and a through groove (49) is provided on the side of the abutting push rod (46). A deflection rod (410) is hinged to the inner wall of the through groove (49). A folding pull rod (411) is hinged to one end of the deflection rod (410), and the end of the folding pull rod (411) away from the deflection rod (410) is fixed to the outside of the limiting sleeve (47).

3. The test bench for a full-face rock tunnel boring machine according to claim 2, characterized in that: The deflection rod (410) has a cut surface, and an H-shaped plate (412) is screwed onto the cut surface of the deflection rod (410). Sliding blocks (413) are slidably connected in the slots at both ends of the H-shaped plate (412). A scraper (414) is fixedly connected to the sliding block (413), and the scraper (414) is slidably connected in the limiting groove opened on the surface of the deflection rod (410). A third spring telescopic rod (45) is fixedly connected between the two scrapers (414).

4. The test bench for a full-face rock tunnel boring machine according to claim 1, characterized in that: The upper edge of the fixing block (44) is semi-circular, and the lower edge of the fixing block (44) is U-shaped.

5. The test bench for a full-face rock tunnel boring machine according to claim 1, characterized in that: The end of the connecting pipe (33) is provided with a through groove.

6. The method of using a full-face rock tunnel boring machine test bench according to claim 3, characterized in that: Includes the following steps: S1: The user places the experimental stone at the end of the crushing disc (34) and fixes it. Then, after fixing the support platform (1), the motor (32) is started. The motor (32) and the connecting pipe (33) at its end work together to drive the crushing disc (34) to rotate clockwise. Then, the hydraulic cylinder (31) slowly extends to make the crushing disc (34) contact the stone, so that the crushing disc (34) crushes the stone. The crushed stone is then conveyed into the collection pipe (5) through the spiral blade (314). S2: When the motor (32) drives the crushing disc (34) to rotate clockwise, the outer center gear (313) rotates clockwise. When the center gear (313) rotates clockwise, it drives the outer transmission gear (38) and the inner gear ring (37) to rotate counterclockwise in sync. When the inner gear ring (37) rotates counterclockwise, it drives the protrusion (312) on it to strike one end of the vibrating rod (35), causing the end of the vibrating rod (35) to vibrate, which in turn works with the crushing disc (34) to crush the stone. S3: Then, when the motor (32) rotates clockwise, it works with the transmission belt (42) to drive the worm (41) to rotate, causing the worm wheel (43) to drive the abutment push rod (46) on it to rotate clockwise. One end of the abutment push rod (46) slides along the surface of the fixed block (44) under the action of the second spring telescopic rod (48). When the abutment push rod (46) slides at the edge of the upper half of the fixed block (44), the deflection rod (410) folds inside the abutment push rod (46). When the push rod (46) slides at the edge of the lower half of the fixed block (44), the edge of the lower half of the fixed block (44) presses the end of the push rod (46), causing the push rod (46) to slide towards the edge of the worm gear (43). Under the action of the folding rod (411), the deflection rod (410) is pulled to deflect and is perpendicular to the push rod (46). At this time, the scraper (414) on the lower side is attached to the inner wall of the collection pipe (5) and slides, pushing and conveying the stones in the collection pipe (5) into the collection box (7) to observe the slag discharge rate of the crushing disc (34) and the vibrating rod (35).

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