Detachable TBM hob penetration rock breaking test device

Abstract

The utility model provides a detachable TBM (Tunnel Boring Machine) hobbing cutter penetration rock breaking test device, which comprises a main body frame which comprises a top plate, a middle plate, a bottom plate and a fixed column, the top plate, the middle plate and the bottom plate are detachably installed on the fixing columns, and the middle plate can move between the top plate and the bottom plate in the vertical direction. Four side plates are detachably mounted on the top surface of the middle plate, and a rectangular groove is defined by the four side plates; the rock sample carrying table is arranged in the middle of the rectangular groove, and confining pressure loading mechanisms are arranged on the front, back, left and right peripheries of the rock sample carrying table; and the hobbing cutter penetration mechanism is arranged above the rock sample carrying table. By means of the detachable design, under the condition of transportation, the device can be disassembled into a plurality of assemblies, the effect of facilitating transportation is achieved, after transportation, the device is assembled on site, and the requirement for testing on the engineering site is met.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of geotechnical engineering, especially a detachable TBM cutterhead penetration rock breaking test device. BACKGROUND

[0002] Since the invention of TBM in the 19th century, with the development and improvement of science and technology, the construction speed and safety of TBM are gradually improved. Compared with the traditional drill and blast method of tunnel construction, the construction driving speed of TBM can reach 3-10 times of it, so TBM has been widely used in various tunnel and underground engineering development. TBM cutterhead penetration test refers to the process of TBM cutterhead penetrating into rock under the action of vertical force. By recording the relationship between penetration and vertical force, and the rock damage during penetration, the mechanism of cutterhead rock breaking is analyzed.

[0003] The current TBM cutterhead penetration rock breaking test basically includes the following steps: sampling and processing of rock mass, transporting rock samples to the laboratory, and then completing the test on the indoor rock press. However, this method has a complicated test process, and the test device is a whole, which cannot be disassembled, causing transportation difficulties and failing to meet the test needs of the engineering site. UTILITY MODEL CONTENT

[0004] The utility model discloses a detachable TBM cutterhead penetration rock breaking test device to solve the technical problem of inconvenient transportation and test on the engineering site.

[0005] The utility model solves the above-mentioned technical problem through the following technical scheme:

[0006] The utility model provides a detachable TBM cutterhead penetration rock breaking test device, which comprises a main frame, the main frame comprises a top plate, an intermediate plate, a bottom plate and a fixed column, the top plate, the intermediate plate and the bottom plate can be detachably installed on the fixed column, and the intermediate plate can move vertically between the top plate and the bottom plate, four side plates are detachably installed on the top surface of the intermediate plate, and the four side plates enclose a rectangular groove, a rock sample loading platform is arranged in the middle of the rectangular groove, and a confining pressure loading mechanism is arranged around the front, back, left and right of the rock sample loading platform, and a cutterhead penetration mechanism is arranged above the rock sample loading platform.

[0007] In the technical scheme, the design can be disassembled, which can be disassembled into multiple components during transportation, facilitating transportation, and assembled on site after transportation, meeting the needs of test on the engineering site.

[0008] Preferably, the bottom end of the fixed column is threadedly connected with the bottom plate, the intermediate plate and the top plate are vertically slidably installed on the fixed column, and the top end of the fixed column is threadedly connected with a first nut for blocking the top plate.

[0009] In the technical solution, the intermediate plate, the top plate and the bottom plate can be detached from the fixing columns in a screwing manner, and are decomposed into multiple small parts, thereby facilitating transportation.

[0010] Preferably, the part of the fixing column between the intermediate plate and the bottom plate is provided with a sleeve.

[0011] In the technical solution, the sleeve is used for supporting, and a space is provided between the intermediate plate and the bottom plate for installing the bottom jack.

[0012] Preferably, the number of the fixing columns is four, and the four fixing columns are divided into two groups.

[0013] Preferably, the four side plates are respectively front side plates, rear side plates, left side plates and right side plates, and the left side plates and the right side plates are respectively located at the inner sides of the two groups of fixing columns.

[0014] In the technical solution, the two groups of fixing columns provide blocking for the left side plates and the right side plates.

[0015] Preferably, a front-rear column is arranged between the front side plates and the rear side plates, the front side plates and the rear side plates are installed at two ends of the front-rear column, and the two ends of the front-rear column are respectively threadedly connected with second nuts.

[0016] In the technical solution, the second nuts are threadedly connected with the two ends of the front-rear column, so that the front side plates, the rear side plates and the front-rear column can be detached and separated.

[0017] Preferably, the confining pressure loading mechanism comprises a right jack and a rear jack, the right jack is installed on the right side plate, the rear jack is installed on the rear side plate, one side of the left side plate is provided with a left pressure head, and one side of the front side plate is provided with a front pressure head.

[0018] In the technical solution, the confining pressure loading mechanism applies confining pressure to the rock sample.

[0019] Preferably, the rolling cutter penetration mechanism comprises a bottom jack, an upper pressure head and a rolling cutter, the bottom jack is installed on the top surface of the bottom plate, the upper pressure head is arranged at the bottom side of the top plate, and the rolling cutter is installed below the upper pressure head.

[0020] Preferably, a clamping groove is formed in the bottom of the upper pressure head, and the top of the rolling cutter is clamped and installed in the clamping groove.

[0021] In the technical solution, the rolling cutter is clamped and installed, so that the rolling cutter can be detached.

[0022] Preferably, the device further comprises a measuring device; the measuring device comprises a top spoke sensor, a front spoke sensor, a left spoke sensor and a laser range finder; the laser range finder is arranged on the right side surface of the bottom of the cutter, the front spoke sensor is arranged between the front side plate and the front pressure head, the left spoke sensor is arranged between the left side plate and the left pressure head, and the top spoke sensor is arranged between the top plate and the upper pressure head.

[0023] On the basis of common knowledge in the art, the above-mentioned preferred conditions can be combined arbitrarily, that is, the preferred examples of the present application are obtained.

[0024] The positive progress effect of the present application is that:

[0025] The above-mentioned detachable TBM cutter penetration rock breaking test device adopts a detachable design for the main frame, and the components can be detached, which provides convenience for overall transportation, and further can be applied to the engineering site for real-time measurement of related test data; further, the rock sample carrier is used for placing the rock sample to be tested, and the confining pressure loading mechanism is arranged around the front, rear, left and right of the rock sample carrier, so that different lateral pressures can be applied to the sample, and the simulated working condition is closer to the real working condition. BRIEF DESCRIPTION OF DRAWINGS

[0026] Figure 1 It is a structural schematic diagram of the whole application.

[0027] Figure 2 It is a structural schematic diagram of the rock sample carrier on both sides and upper and lower positions of the present application.

[0028] Figure 3 It is a structural schematic diagram of the rock sample carrier around the front, rear, left and right of the present application.

[0029] Figure 4 It is a structural schematic diagram of the cutter and the laser range finder of the present application.

[0030] EXPLANATION OF REFERENCE NUMERALS

[0031] 1, main frame; 11, top plate; 12, middle plate; 13, bottom plate; 14, fixed column; 15, front side plate; 16, rear side plate; 17, left side plate; 18, right side plate; 19, front and rear column; 110, first nut; 111, screw washer; 140, sleeve; 150, second nut;

[0032] 2, rock sample carrier;

[0033] 3, confining pressure loading mechanism; 31, right jack; 32, rear jack; 33, left pressure head; 34, front pressure head;

[0034] 4, cutter penetration mechanism; 41, bottom jack; 42, upper pressure head; 43, cutter;

[0035] 5. Measuring equipment; 51. Top wheel spoke sensor; 52. Front wheel spoke sensor; 53. Left wheel spoke sensor; 54. Laser rangefinder;

[0036] 6. Rock samples. Detailed Implementation

[0037] The present invention will be further illustrated by way of embodiments below, but the present invention is not limited to the scope of the embodiments described herein.

[0038] like Figures 1-4 As shown, a detachable TBM roller cutter rock-breaking test device includes: a main frame 1, which includes a top plate 11, a middle plate 12, a bottom plate 13, and a fixed column 14; the top plate 11, the middle plate 12, and the bottom plate 13 can all be detachably installed on the fixed column 14, and the middle plate 12 can move vertically between the top plate 11 and the bottom plate 13; four side plates are detachably installed on the top surface of the middle plate 12, and the four side plates form a rectangular groove; a rock sample platform 2, which is located in the middle of the rectangular groove, and a confining pressure loading mechanism 3 is provided around the front, back, left, and right sides of the rock sample platform 2; and a roller cutter penetration mechanism 4, which is located above the rock sample platform 2.

[0039] Rock sample stage 2 is used to place rock sample 6.

[0040] like Figure 1 As shown, there are four fixing posts 14. Threaded holes are opened at the four corners of the base plate 13. Both ends of the fixing posts 14 are threaded. The threads at the bottom of the four fixing posts 14 are threaded to the threaded holes at the four corners of the base plate 13, allowing the fixing posts 14 and the base plate 13 to be easily disassembled and assembled. Through holes are opened at the corresponding four corners of the intermediate plate 12 and the top plate 11. The fixing posts 14 pass through the through holes of the intermediate plate 12 and the top plate 11, allowing the intermediate plate 12 and the top plate 11 to slide along the length of the fixing posts 14, i.e., vertically. A first nut 110 is installed on the thread at the top of the fixing post 14. After installation, the first nut 110 is located above the top plate 11, and the first nut 110 limits and blocks the top plate 11. At the same time, the first nut 110 is used for threaded connection, which facilitates disassembly and assembly. The intermediate plate 12 and the top plate 11 are sleeved with the fixing posts 14 through the through holes, allowing the intermediate plate 12 and the top plate 11 to slide off or insert into the fixing posts 14.

[0041] like Figure 1As shown, the part of the fixed column 14 between the middle plate 12 and the bottom plate 13 is sleeved with a sleeve 140, the inner wall of the sleeve 140 matches the cylindrical surface of the fixed column 14, the outer diameter of the sleeve 140 is larger than the hole diameter of the middle hole upper through hole, the sleeve 140 is used to support the middle plate 12, so that a space is formed between the middle plate 12 and the bottom plate 13, and then the space provides a mounting space for the bottom jack 41.

[0042] As shown in the figure, Figures 1-2 As shown, the four fixed columns 14 are divided into two groups; the four side plates are respectively front side plate 15, rear side plate 16, left side plate 17 and right side plate 18; the left side plate 17 and the right side plate 18 are respectively located on the inner side of the two groups of fixed columns 14, that is, the left side plate 17 and the right side plate 18 are located between the two groups of fixed columns 14, and the two groups of fixed columns 14 block the left side plate 17 and the right side plate 18.

[0043] The left side plate 17 and the right side plate 18 are directly placed above the middle plate 12, and the two groups of fixed columns 14 provide blocking for the left side plate 17 and the right side plate 18 under the pressure of the right jack 31; by being directly placed on the middle plate 12, the left side plate 17 and the right side plate 18 can be directly taken off or mounted on the middle plate 12.

[0044] The front side plate 15 and the rear side plate 16 are provided with front and rear columns 19; the front side plate 15 and the rear side plate 16 are slidingly installed on the front and rear columns 19 in the front and rear directions, and the two ends of the front and rear columns 19 are both threadedly connected with the second nut 150. The number of the front and rear columns 19 is four, and holes are formed at the four corners of the front side plate 15 and the four corners of the rear side plate 16, the front and rear columns 19 pass through the holes on the front side plate 15 and the rear side plate 16, and threads are arranged at the two ends of the front and rear columns 19 for connecting with the second nut 150. Under the pressure of the rear jack 32, the second nut 150 blocks the front side plate 15 and the rear side plate 16.

[0045] By threadedly connecting the second nut 150, the front side plate 15 and the rear side plate 16 can be disassembled, and after the second nut 150 is removed, the front side plate 15 and the rear side plate 16 can slide off or be inserted from the front and rear columns 19 through the holes, so that the front side plate 15, the rear side plate 16 and the front and rear columns 19 can be disassembled.

[0046] Further, the first nut 110 and the second nut 150 are both provided with a screw washer 111.

[0047] The confining pressure loading mechanism 3 includes a right jack 31 and a rear jack 32; the right jack 31 is installed on the right side plate 18, the rear jack 32 is installed on the rear side plate 16, one side of the left side plate 17 is provided with a left pressure head 33, and one side of the front side plate 15 is provided with a front pressure head 34.

[0048] The right jack 31, the left pressing head 33, the rear jack 32 and the front pressing head 34 are respectively located at the right, left, rear and front four positions of the rock sample carrier 2, and the right jack 31 and the rear jack 32 can apply confining pressure to the rock sample 6 on the rock sample carrier 2.

[0049] The rolling cutter penetrating mechanism 4 comprises a bottom jack 41, an upper pressing head 42 and a rolling cutter 43; the bottom jack 41 is installed on the top surface of the bottom plate 13, the upper pressing head 42 is arranged on the bottom side of the top plate 11, and the rolling cutter 43 is installed below the upper pressing head 42. The bottom of the upper pressing head 42 is provided with a clamping groove, and the top of the rolling cutter 43 is clamped and installed into the clamping groove.

[0050] The bottom jack 41 lifts the middle plate 12, so that the rock sample 6 interacts with the rolling cutter 43, and according to the principle that the action of Newton's third law force is mutual, the rolling cutter 43 can be equivalent to the action of the rock sample 6.

[0051] As shown in Figure 2 and Figure 4 The top of the rolling cutter 43 and the clamping groove can adopt an inverted "convex" shape for clamping.

[0052] The rolling cutter 43 needs to bear a large pressure, and the deformation of the rolling cutter 43 needs to be strictly controlled. Therefore, the material for manufacturing the rolling cutter 43 is SKD11 high-strength steel, and in order to further enhance the hardness of the rolling cutter 43, the manufactured rolling cutter 43 is subjected to vacuum heat treatment, so that the hardness of the rolling cutter 43 can reach above HRC60.

[0053] The measuring device 5 comprises a top spoke sensor 51, a front spoke sensor 52, a left spoke sensor 53 and a laser range finder 54; the laser range finder 54 is arranged on the bottom right side of the rolling cutter 43, the front spoke sensor 52 is arranged between the front side plate 15 and the front pressing head 34, the left spoke sensor 53 is arranged between the left side plate 17 and the left pressing head 33, and the top spoke sensor 51 is arranged between the top plate 11 and the upper pressing head 42.

[0054] The normal force data of the rolling cutter 43 can be monitored in real time through the top spoke sensor 51, the confining pressure is applied by the right jack 31 and the rear jack 32, and the lateral confining pressure data can be accurately monitored through the left spoke sensor 53 and the front spoke sensor 52;

[0055] The left spoke sensor 53, the front spoke sensor 52 and the top spoke sensor 51 can collect and record the changes of the normal force and the confining pressure in two directions in the penetrating process in real time through the connection data acquisition device, and the normal force data can be read and stored in real time by using the matching software.

[0056] In the process of the cutter 43 penetrating into the rock sample 6, the laser range finder 54 moves along with the cutter 43 penetrating, so as to accurately measure the penetration displacement of the cutter 43. After the laser range finder 54 is arranged, the data acquisition device USB data acquisition card is connected, so as to collect the normal displacement of the cutter 43 in the penetration process in real time. The cutter 43 penetration degree data can be read in real time by connecting the acquisition card with the computer.

[0057] The measuring device 5 further comprises an acoustic emission detection device, which is an acoustic emission instrument. An acoustic emission sensor is arranged on each side of the rock sample 6. The acoustic emission sensor is fixed to the rock surface by using quick-drying glue. After the detection signal is determined to be qualified by the lead breaking test, the penetration test is performed. The acoustic emission signal is monitored and analyzed by using the acoustic emission signal processing software.

[0058] Through the above, the normal displacement change in the penetration process of the cutter 43, i.e., the penetration displacement of the cutter 43, is recorded; the normal force of the cutter 43 and the size of the confining pressure are recorded; and the damage and destruction of the rock in the penetration process of the cutter 43 are recorded.

[0059] The test process of the detachable TBM cutter 43 rock penetration test device described in the embodiment is as follows:

[0060] Step 1: Assemble the test device. First, the lower parts of the four fixing columns 14 are screwed into the four threaded holes of the bottom plate 13, and the four through holes of the middle plate 12 are ensured to pass through the fixing columns 14 and slide above the sleeves 140 of the fixing columns 14, so that the middle plate 12 is placed as a platform for other devices. The left side plate 17 and the right side plate 18 are placed on the left and right sides of the middle plate 12, and the left spoke sensor 53 and the left pressure head 33 are installed on the left side plate 17, and the right jack 31 is installed on the right side plate 18. Then, the rock sample carrier 2 is placed in the center of the middle plate 12, and the rock sample 6 with the acoustic emission sensor attached is placed on the center of the rock sample carrier 2. Then, the rear jack 32 and the rear side plate 16 are installed, the front pressure head 34, the front spoke sensor 52 and the front side plate 15 are installed, and the four front and rear columns 19 are passed through the holes of the front side plate 15 and the rear side plate 16, and the second nut 150 is used to fix them. Finally, the cutter 43 is clamped into the clamping groove of the upper pressure head 42, the upper pressure head 42 and the top spoke sensor 51 are installed, the top spoke sensor 51 is installed on the top plate 11, and the top plate 11 is covered. The through hole of the top plate 11 passes through the fixing column 14, and the four first nuts 110 are tightened to the top end of the fixing column 14, so that the bottom of the cutter 43 is in contact with the top of the rock sample 6.

[0061] Step 2: First, connect the laser range finder 54, top spoke sensor 51, front spoke sensor 52, left spoke sensor 53, acoustic emission probe and their corresponding data acquisition devices, and turn on all data monitoring devices. Then, apply confining pressure to the rock at a certain rate through the right jack 31 and the rear jack 32, adjust the bottom jack 41 to lift the device on the middle plate 12, and simulate the process of the rolling cutter 43 penetrating into the rock.

[0062] Step 3: After the rock sample 6 is destroyed, remove the bottom pressure and confining pressure, unscrew the first nut 110, remove the top plate 11, top spoke sensor 51, and upper pressure head 42. Then unscrew the second nut 150 at the end of the front and rear columns 19, remove the front and rear columns 19, and remove the front side plate 15, rear side plate 16 and their connected components. Finally, the left side plate 17 and the right side plate 18 and their connected components can be removed.

[0063] Step 4: Observe the destruction of the rock sample 6, and remove the rock sample 6 and the rock sample carrier 2.

[0064] In specific implementation, the top end of the fixed column 14 has a long enough thread, so that when the first nut 110 is tightened, the first nut 110 presses down the top plate 11, and the rolling cutter 43 contacts the top of the rock sample 6.

[0065] The utility model is not limited to the above-mentioned embodiment, no matter makes any change in its shape or structure, all falls in the protection scope of the utility model. The protection scope of the utility model is defined by the appended claims, and the person skilled in the art can make various changes or modifications to these embodiments without departing from the principles and essence of the utility model, but these changes and modifications all fall into the protection scope of the utility model.

Claims

1. A detachable TBM cutterhead penetration rock breaking test device, characterized in that, The utility model relates to a rock sample loading device, which comprises a main body frame (1) and a rock sample carrier (2). The main body frame (1) comprises a top plate (11), an intermediate plate (12), a bottom plate (13) and fixing columns (14); the top plate (11), the intermediate plate (12) and the bottom plate (13) are detachably installed on the fixing columns (14), and the intermediate plate (12) is vertically movable between the top plate (11) and the bottom plate (13). The top surface of the intermediate plate (12) is detachably provided with four side plates, which form a rectangular groove. The rock sample carrier (2) is arranged in the middle of the rectangular groove, and the rock sample carrier (2) is provided with a confining pressure loading mechanism (3) around the front, back, left and right sides. The rolling cutter penetration mechanism (4) is arranged above the rock sample carrier (2).

2. The detachable TBM cutterhead penetration rock breaking test device according to claim 1, characterized in that: The bottom end of the fixing column (14) is threadedly connected with the bottom plate (13), the intermediate plate (12) and the top plate (11) are vertically slidably installed on the fixing column (14), and the top end of the fixing column (14) is threadedly connected with a first nut (110) for blocking the top plate (11).

3. The detachable TBM cutterhead penetration rock breaking test device of claim 1, wherein: The part of the fixing column (14) between the intermediate plate (12) and the bottom plate (13) is provided with a sleeve (140).

4. The detachable TBM cutterhead penetration rock breaking test device of claim 1, wherein: The number of the fixing columns (14) is four, and the four fixing columns (14) are divided into two groups.

5. A detachable TBM cutterhead penetration rock breaking test device according to claim 4, characterized in that: The four side plates are respectively a front side plate (15), a rear side plate (16), a left side plate (17) and a right side plate (18); the left side plate (17) and the right side plate (18) are respectively arranged on the inner sides of the two groups of fixing columns (14).

6. A detachable TBM cutterhead penetration rock breaking test device according to claim 5, characterized in that: A front-rear column (19) is arranged between the front side plate (15) and the rear side plate (16); the front side plate (15) and the rear side plate (16) are installed on the two ends of the front-rear column (19), and the two ends of the front-rear column (19) are threadedly connected with second nuts (150).

7. A detachable TBM cutterhead penetration rock breaking test device according to claim 5, characterized in that: The confining pressure loading mechanism (3) comprises a right jack (31) and a rear jack (32); the right jack (31) is installed on the right side plate (18), the rear jack (32) is installed on the rear side plate (16), one side of the left side plate (17) is provided with a left pressure head (33), and one side of the front side plate (15) is provided with a front pressure head (34).

8. A detachable TBM cutterhead penetration rock breaking test device according to claim 7, characterized in that: The rolling cutter penetration mechanism (4) comprises a bottom jack (41), an upper pressure head (42) and a rolling cutter (43); the bottom jack (41) is installed on the top surface of the bottom plate (13), the upper pressure head (42) is arranged on the bottom side of the top plate (11), and the rolling cutter (43) is installed below the upper pressure head (42).

9. A detachable TBM cutterhead penetration rock breaking test device according to claim 8, characterized in that: The bottom of the upper pressure head (42) is provided with a clamping groove, and the top of the rolling cutter (43) is clamped and installed in the clamping groove.

10. The detachable TBM cutterhead penetration rock breaking test device of claim 8, wherein: It also includes a measuring device (5); the measuring device (5) includes a top spoke sensor (51), a front spoke sensor (52), a left spoke sensor (53) and a laser range finder (54); the laser range finder (54) is arranged on the bottom right side of the hob (43), the front spoke sensor (52) is arranged between the front side plate (15) and the front pressure head (34), the left spoke sensor (53) is arranged between the left side plate (17) and the left pressure head (33), and the top spoke sensor (51) is arranged between the top plate (11) and the upper pressure head (42).

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