Bedrock crushing device for tunnel excavation

Abstract

The invention provides a tunnel excavation bedrock crushing device which comprises a second crushing part and a first crushing part, the second crushing part is fixedly connected with the first crushing part, a first crushing cavity is formed in the first crushing part, an open hole is formed in one side face of the first crushing cavity, and the open hole is rotationally connected with a first transmission shaft; two first crushing rollers are arranged on the part, in the first crushing cavity, of the outer circular surface of the first transmission shaft, a first motor is fixedly connected to the end, outside the first crushing cavity, of the first transmission shaft, and a second crushing cavity is formed in the second crushing part; three open holes are formed in the end face, away from the first smashing part, of the second smashing part. According to the scheme, three-step physical crushing is carried out through the first crushing roller, the secondary crushing disc and the third crushing holes in the planet wheel, so that crushing is uniform enough, combustible chemicals do not need to be used for crushing, and the purposes of improving the crushing uniformity and protecting the environment are achieved.

Description

Technical Field

[0001] This invention relates to the field of rock crushing equipment technology, specifically a bedrock crushing device for tunnel excavation. Background Art

[0002] Currently, rock crushing products are an important material source for artificial concrete, and the uniformity of rock crushing affects the quality of artificial concrete to a certain extent.

[0003] For example, a Chinese patent discloses "Rock Crushing" (patent number: CN102587912A), which includes an auxiliary cylinder (60) comprising an elongated body (62), end closures (66, 90) at each end of the body (62), and a charge of combustible material in a space defined by the body (62) and the end closures (66, 90). The end closure (66) includes a fragile diaphragm (86) that seals the charge (88) of combustible chemicals. The aforementioned patent has the advantage that, when subjected to pressure from an externally ignited, rapidly burning combustible material, the diaphragm (86) fails, allowing flames to flash from the outside of the auxiliary cylinder through the diaphragm into the interior of the auxiliary cylinder.

[0004] However, the rock crushing process described above is not environmentally friendly and the crushing uniformity is low because of the use of flammable chemicals to crush the rocks. Summary of the Invention

[0005] (a) Technical problems to be solved

[0006] To address the shortcomings of existing technologies, this invention provides a bedrock breaking device for tunnel excavation, which solves the problems mentioned in the background section.

[0007] (2) Technical solution

[0008] To achieve the above objectives, the present invention provides the following technical solution: a bedrock crushing device for tunnel excavation, characterized in that it includes a second crushing section and a first crushing section, the second crushing section and the first crushing section are fixedly connected, the first crushing section has a first crushing chamber, one side of the first crushing chamber has an opening, the opening is rotatably connected to a first drive shaft, the outer circumference of the first drive shaft is provided with two first crushing rollers on the portion inside the first crushing chamber, the end of the first drive shaft outside the first crushing chamber is fixedly connected to a first motor, the second crushing section has a second crushing chamber, the end face of the second crushing section away from the first crushing section has three openings, one of the three openings of the second crushing section is located at the center of the end face of the second crushing section, the opening at the center of the end face of the second crushing section is provided with a second motor, and the other two openings of the second crushing section are fixedly connected to a discharge channel.

[0009] Preferably, the second grinding chamber is provided with a transmission mechanism, a planetary gear set and a secondary grinding disc. The output shaft of the second motor is fixedly connected to one end of the transmission mechanism in the second grinding chamber. The other end of the transmission mechanism is fixedly connected to the planetary gear set and rotatably connected to the secondary grinding disc.

[0010] Preferably, the planetary gear set includes a toothed disc, a sun gear, and several planetary gears. The toothed disc is fixedly connected to the outer circular surface of the second crushing chamber. The secondary crushing disc and the toothed disc form a cavity. The sun gear and the several planetary gears are all disposed within the cavity formed by the secondary crushing disc and the toothed disc.

[0011] Preferably, the planetary gears are arranged with equal arcs around the sun gear as the center, and each planetary gear has a plurality of tertiary crushing holes for tertiary crushing of the rock.

[0012] Preferably, the sun gear is disposed among a plurality of planet gears, the sun gear meshes with the planet gears, the planet gears mesh with the gear disk, and the diameter of the gear disk is equal to twice the diameter of the planet gears plus the diameter of the sun gear.

[0013] Preferably, the secondary crushing disc has a plurality of secondary crushing holes, which are used to crush the rock in a secondary manner.

[0014] Preferably, an opening is provided on one end face of the second crushing section near the first crushing section, and the opening is used to guide the initially crushed rock fragments into the second crushing section.

[0015] Preferably, the outer surface of the first crushing roller is provided with rock crushing patterns, and the two first crushing rollers rotate in opposite directions.

[0016] (3) Beneficial effects

[0017] This invention provides a bedrock breaking device for tunnel excavation. It has the following beneficial effects:

[0018] 1. This solution uses a three-step physical crushing method, consisting of a first crushing roller, a second crushing disc, and three crushing holes on a planetary gear, to achieve sufficiently uniform crushing without the need for flammable chemicals, thus improving the uniformity of crushing and being environmentally friendly. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the main structure of the present invention;

[0020] Figure 2 This is a side view of the present invention;

[0021] Figure 3 This is a cross-sectional structural diagram of the present invention;

[0022] Figure 4 This is a schematic diagram of the exploded structure of the present invention;

[0023] Figure 5 This is a schematic cross-sectional view of the planetary gear set and the secondary crushing disc in this invention.

[0024] In the diagram: 11. Second crushing section; 12. Second crushing chamber; 13. Discharge channel; 14. Second motor; 15. Drive shaft; 16. Secondary crushing disc; 17. Secondary crushing hole; 18. Gear disc; 20. Sun gear; 21. Planetary gear; 22. Tertiary crushing hole; 30. First crushing section; 31. First crushing chamber; 32. First crushing roller; 33. First motor; 34. First drive shaft. Detailed Implementation

[0025] This invention provides a planetary gear structure granulator printer, such as... Figure 1-5 As shown, it includes a second crushing section 11, a second crushing chamber 12, a discharge channel 13, a second motor 14, a transmission shaft 15, a secondary crushing disc 16, a secondary crushing hole 17, a toothed disc 18, a sun gear 20, a planetary gear 21, a tertiary crushing hole 22, a first crushing section 30, a first crushing chamber 31, a first crushing roller 32, a first motor 33, and a first transmission shaft 34.

[0026] like Figure 1-2 As shown, a first crushing chamber 31 is provided in the first crushing section 30. An opening is provided on one side of the first crushing chamber 31. A first drive shaft 34 is rotatably connected to the opening. Two first crushing rollers 32 are provided on the outer circular surface of the first drive shaft 34 inside the first crushing chamber 31. A first motor 33 is fixedly connected to the end of the first drive shaft 34 outside the first crushing chamber 31. Rock crushing patterns are provided on the outer circular surface of the first crushing rollers 32. The two first crushing rollers 32 rotate in opposite directions. An opening is provided on the end face of the second crushing section 11 near the first crushing section 30. The opening is used to guide the initially crushed rock fragments into the second crushing section 11.

[0027] like Figure 3-5 As shown, the second crushing part 11 is a cylindrical shell with a second crushing chamber 12 inside. A circular opening is provided at the center of the upper surface of the second crushing part 11 for the transmission shaft of the second motor 14 to pass through. The upper surface of the second crushing part 11 also has two circular openings for fixed connection with the discharge channels 13. Both discharge channels 13 are cylindrical channels and are located on the upper surface of the second crushing part 11. The second crushing chamber 12 is a cylindrical cavity, and the transmission mechanism, planetary gear set and secondary crushing disc 16 are all located inside the second crushing chamber 12.

[0028] The lower end of the drive shaft of the second motor 14 is fixedly connected to the upper end of the drive shaft 15. The lower end of the drive shaft 15 is fixedly connected to the sun gear 20. The lower end of the drive shaft 15 is rotatably connected to the secondary crushing disc 16. The secondary crushing disc 16 is fixedly connected to the outer wall of the second crushing chamber 12. The secondary crushing disc 16 divides the second crushing chamber 12 into upper and lower parts. The secondary crushing disc 16 has several secondary crushing holes 17. The several secondary crushing holes 17 of the secondary crushing disc 16 are used to further crush the rock that has been initially crushed. Three planetary gears 21 are arranged around the sun gear 20 with equal arcs as the center. The sun gear 20 meshes with the three planetary gears 21. The three planetary gears 21 mesh with the gear disk 18. Each planetary gear 21 is provided with several tertiary crushing holes 22. The tertiary crushing holes 22 are used to further crush the rock that has passed through the secondary crushing holes 17.

[0029] The diameter of the gear disk 18 is equal to twice the diameter of the planet gears 21 plus the diameter of the sun gear 20. Since the sun gear 20 meshes with all three planet gears 21, and all three planet gears 21 mesh with the gear disk 18, and the gear disk 18 is fixedly connected to the outer wall of the second crushing chamber 12, and the sun gear 20 is fixedly connected to the transmission shaft 15, the sun gear 20 rotates around the transmission shaft 15, and the planet gears 21 revolve around the sun gear 20 while rotating on their own axis. The direction of rotation of the planet gears 21 is opposite to the direction of rotation of the sun gear 20, and the direction of revolution of the planet gears 21 is opposite to the direction of rotation of the sun gear 20.

[0030] When the present invention crushes rocks, the first motor 33 is started first to send the large rock drilled by the drill bit into the first crushing chamber 31. The first crushing roller 32 rotates in the opposite direction to initially crush the rock. Then, the second motor 14 is turned on and the rock that has been initially crushed is sent from the connection between the second crushing section 11 and the first crushing section 30 into the upper part of the second crushing section 11. After the rock that has been initially crushed passes through the secondary crushing hole 17 for secondary crushing and the tertiary crushing hole 22 for tertiary crushing, it enters the lower part of the second crushing section 11. Finally, the crushed rock is discharged from the discharge channel 13.

[0031] by Figure 4 Taking the clockwise rotation of the output shaft of the second motor 14 as an example, the secondary and tertiary crushing causes the output shaft of the second motor 14 to drive the transmission shaft 15 to rotate clockwise around the output shaft of the second motor 14. The transmission shaft 15 drives the sun gear 20 to rotate clockwise around the transmission shaft 15. Since the sun gear 20 meshes with the planet gear 21, the planet gear 21 rotates counterclockwise. Since the planet gear 21 meshes with the gear disk 18, and the gear disk 18 is fixedly connected to the outer wall of the second crushing chamber 12, the planet gear 21 revolves counterclockwise around the sun gear 20.

[0032] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A bedrock breaking device for tunnel excavation, characterized in that: The device includes a second crushing section (11) and a first crushing section (30), which are fixedly connected. The first crushing section (30) has a first crushing chamber (31) inside, and an opening is provided on one side of the first crushing chamber (31). A first drive shaft (34) is rotatably connected to the opening. Two first crushing rollers (32) are provided on the outer circumference of the first drive shaft (34) inside the first crushing chamber (31). The first drive shaft (34) is fixed to one end outside the first crushing chamber (31). A first motor (33) is connected to the second crushing part (11), and a second crushing chamber 12 is provided inside the second crushing part (11). Three openings are provided on one end face of the second crushing part (11) away from the first crushing part (30). One of the openings of the second crushing part (11) is located at the center of the end face of the second crushing part (11). A second motor (14) is provided in the opening at the center of the end face of the second crushing part (11). The other two openings of the second crushing part (11) are fixedly connected to the discharge channel (13).

2. The bedrock breaking device for tunnel excavation according to claim 1, characterized in that: The second crushing chamber (12) is provided with a transmission mechanism, a planetary gear set and a secondary crushing disc (16). The output shaft of the second motor (14) is fixedly connected to one end of the transmission mechanism in the second crushing chamber (12). The other end of the transmission mechanism is fixedly connected to the planetary gear set and the other end of the transmission mechanism is rotatably connected to the secondary crushing disc (16).

3. The bedrock breaking device for tunnel excavation according to claim 2, characterized in that: The planetary gear set includes a toothed disc (18), a sun gear (20), and several planetary gears (21). The toothed disc (18) is fixedly connected to the outer surface of the second crushing chamber (12). The secondary crushing disc (16) and the toothed disc (18) form a cavity. The sun gear (20) and the several planetary gears (21) are all disposed in the cavity formed by the secondary crushing disc (16) and the toothed disc (18).

4. The bedrock breaking device for tunnel excavation according to claim 3, characterized in that: The planetary gears (21) are arranged with equal arcs around the sun gear (20). Each of the planetary gears (21) is provided with a number of three-stage crushing holes (22). The three-stage crushing holes (22) of the planetary gears (21) are used to crush the rock three times.

5. A bedrock breaking device for tunnel excavation according to claim 2, characterized in that: The sun gear (20) is disposed among a plurality of planet gears (21), the sun gear (20) meshes with the planet gears (21), the planet gears (21) mesh with the gear disk (18), and the diameter of the gear disk (18) is equal to twice the diameter of the planet gears (21) plus the diameter of the sun gear (20).

6. The bedrock breaking device for tunnel excavation according to claim 2, characterized in that: The secondary crushing disc (16) has a plurality of secondary crushing holes (17), which are used to crush the rock in a secondary manner.

7. The bedrock breaking device for tunnel excavation according to claim 1, characterized in that: An opening is provided on one end face of the second crushing section (11) near the first crushing section (30), and the opening is used to guide the initially crushed rock fragments into the second crushing section (11).

8. The bedrock breaking device for tunnel excavation according to claim 1, characterized in that: The outer surface of the first crushing roller (32) is provided with rock crushing patterns, and the two first crushing rollers (32) rotate in opposite directions.

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