Test system and test method for moment-resistance material properties of strip brittle stone

Abstract

The present invention discloses a testing system for the bending moment resistance material properties of strip brittle stone, comprising a first clamping block and a second clamping block, wherein the first clamping block and the second clamping block are respectively provided with a first clamping slot and a second clamping slot on one side close to each other; the present invention also comprises a strip brittle stone to be subjected to the bending moment resistance test, wherein the two ends of the strip brittle stone are respectively movably clamped into the first clamping slot and the second clamping slot; the present invention also comprises a gravity pressure roller, wherein the gravity pressure roller is tangent to the midpoint of the strip brittle stone; and a counterweight unit, wherein the gravity of the counterweight unit is transmitted to the tangent point between the gravity pressure roller and the strip brittle stone through the gravity pressure roller; the present invention can also realize a relatively accurate and quantitative bending moment resistance test without introducing a precision pressure sensor and a precision propulsion device.

Description

Technical Field

[0001] The invention belongs to the field of material property detection of stone. Background Art

[0002] Strip stone is widely used in the fields of construction and garden construction. When testing the bending moment resistance of this type of stone, the two ends of the strip stone are generally fixed, and then pressure is applied to the middle of the strip stone through a pushing device. The bending resistance is judged by the pushing force of the pushing device when the strip stone breaks. Since the strip stone is a brittle material, the bending elastic deformation of the strip stone is very small during the application of bending moment, resulting in a very large pressure change with a very small feed amount of the pushing device. Therefore, the feed amount accuracy of the pushing device and the sensitivity of the pressure sensor are very high, which leads to cost problems. Summary of the invention

[0003] Purpose of the invention: In order to overcome the deficiencies in the prior art, the present invention provides a test system and method for the bending moment resistance material properties of strip brittle stone, which can achieve relatively accurate and quantitative bending moment resistance tests without introducing precision pressure sensors and precision propulsion devices.

[0004] Technical solution: To achieve the above-mentioned purpose, the test system for the bending moment resistance material properties of strip brittle stone of the present invention comprises a first clamping block and a second clamping block, wherein the first clamping block and the second clamping block are respectively provided with a first clamping port and a second clamping port on one side close to each other;

[0005] It also includes a strip of brittle stone to be tested for bending moment resistance, wherein the two ends of the strip of brittle stone can be movably inserted into a first slot and a second slot respectively, and also includes a gravity pressure roller, and the gravity pressure roller is tangent to the midpoint of the strip of brittle stone, and also includes a counterweight unit, and the gravity of the counterweight unit is transmitted to the tangent point between the gravity pressure roller and the strip of brittle stone through the gravity pressure roller.

[0006] Furthermore, it includes an arcuate bar with a horizontal axis, and a driving unit can drive the arcuate bar to rotate along its own axis; the clockwise end and the counterclockwise end of the arcuate bar are respectively fixedly connected to the first clamping block and the second clamping block, so that the strip-shaped brittle stone and the arcuate bar are combined into a bowstring structure.

[0007] Furthermore, the inner wall of the arcuate circular arc strip is arrayed with transmission teeth in the arc direction, and also includes a driving gear, which is meshed with the transmission teeth to drive the arcuate circular arc strip to rotate along its own axis.

[0008] Furthermore, the axis of the gravity pressure roller coincides with the axis of the bow-shaped arc bar, so that the bow-shaped arc bar can rotate at any angle along its own axis, and the tangent point of the gravity pressure roller on the strip of brittle stone does not change; assuming that the strip of brittle stone is in a horizontal state in the initial state, when the strip of brittle stone is in a horizontal state: the pressure of the gravity pressure roller at the tangent point of the strip of brittle stone is recorded as G, if the bow-shaped arc bar rotates a° along its own axis, and the range of a° is 0°≤a°<90°, the tangent point position of the gravity pressure roller on the strip of brittle stone does not change, at this time, the reaction force of the gravity pressure roller on the pressure at the tangent point of the strip of brittle stone is recorded as F; the F vector is decomposed into a horizontal component F2 and a longitudinal component F1; satisfying |F1|=|G|, and |F|=|G| / cos(a°).

[0009] Furthermore, the counterweight unit includes a cylindrical counterweight body, the lower end of which is fixedly connected to a first parallel and vertical guide column and a second guide column, the lower ends of the first guide column and the second guide column are commonly connected to a structural block, a roller seat is fixedly provided on the lower side of the structural block, and the gravity pressure roller is rotatably mounted on the roller seat; a first pair of guide wheels and a second pair of guide wheels are respectively provided on the side of the first guide column and the second guide column that are away from each other; the wheel grooves on the first pair of guide wheels are rollingly matched with the first guide column, and the wheel grooves on the second pair of guide wheels are rollingly matched with the second guide column; so that the first guide column and the second guide column can only move up and down under the constraints of the first pair of guide wheels and the second pair of guide wheels; and also includes a motor, the motor of the motor The motor bracket is fixed on the bearing seat, and the output shaft end of the motor is coaxially fixedly connected to the driving gear; the outer ring of the output shaft is coaxially provided with a brake ring, and the inner ring of the brake ring is fixedly connected to the brake ring through a plurality of connecting arms; an arc brake pad is arranged above the brake ring, and the arc inner diameter of the arc brake pad is consistent with the outer diameter of the brake ring, and there is a gap between the arc brake pad and the outer ring of the brake ring; the arc brake pad is fixedly connected to the structural block through the synchronous arm, and when the strip-shaped brittle stone breaks under the action of the bending moment force applied by the gravity pressure roller, the gravity pressure roller falls due to the loss of F, and the fall of the structural block drives the arc brake pad to fall until it locks the brake ring, so that the output shaft and the driving gear cannot rotate;

[0010] Furthermore, a torque sensor is provided on the output shaft, and when the torque sensor senses that the torque of the output shaft suddenly increases, the motor is immediately powered off.

[0011] Furthermore, it also includes an arc-shaped scale bar coaxial with the outside of the arc-shaped circular arc bar; the arc-shaped scale bar is provided with angle scale lines along the clockwise direction of the arc; when the strip of brittle stone is horizontal, a vertical downward pointed indicator arrow is fixed to the bottom end of the arc-shaped circular arc bar, and the pointed indicator arrow corresponds to the starting scale line of the arc-shaped scale bar.

[0012] Furthermore, in the initial state, the pointed indicator arrow corresponds to the starting zero scale line of the arc-shaped scale bar;

[0013] When the strip of brittle stone is in a horizontal state, the pressure G of the gravity pressure roller at the intersection of the strip of brittle stone is a known critical value; if the intersection of the strip of brittle stone is under the pressure of G, the strip of brittle stone will break directly, indicating that the strip of brittle stone is unqualified; if the strip of brittle stone does not break, the arc-shaped circular bar rotates slowly clockwise along its own axis, and the scale on the arc-shaped scale bar pointed by the pointed indicator arrow is a°, and the scale on the arc-shaped scale bar pointed by the pointed indicator arrow is a°. Entering into the formula |F|=|G| / cos(a°) for calculation, it is concluded that the pressure at the tangent point of this strip of brittle stone is |F|; if the strip of brittle stone 33 breaks in the interval of 0°≤a°<30°, it means that this strip of brittle stone is a low-grade product in terms of bending resistance; if the strip of brittle stone breaks in the interval of 30°≤a°<60°, it means that this strip of brittle stone is a medium-grade product in terms of bending resistance; if the strip of brittle stone breaks in the interval of 60°≤a°<90°, it means that this strip of brittle stone is a high-grade product in terms of bending resistance.

[0014] Beneficial effects: The present invention can achieve relative accuracy without introducing precision pressure sensors and precision propulsion devices, and based on quantitative bending moment tests, it can further distinguish the ultimate bending performance of strip brittle stone, and introduce experimental result grading of low-grade bending moment products, mid-grade bending moment products, and high-grade bending moment products, which has great advantages in both cost and product maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Attached Figure 1 This is the overall schematic diagram of the device;

[0016] Attached Figure 2 is a side view of the device;

[0017] Attached Figure 3 This is an explosion diagram of the device;

[0018] Attached Figure 4 For attachment Figure 1 Front view of the lower part;

[0019] Attached Figure 5 For attachment Figure 4 Schematic diagram of the arc strip after being deflected a° clockwise on the basis of FIG.

[0020] Attached Figure 6 Schematic diagram of the horizontal force F2 and the longitudinal force F1 decomposed into by the F vector;

[0021] Attached Figure 7 This is a schematic diagram of the brake ring structure. DETAILED DESCRIPTION

[0022] The present invention will be further described below in conjunction with the accompanying drawings.

[0023] As attached Figures 1 to 7 The test system for the moment-bending material properties of strip brittle stone is shown in Figure 3 , including a first clamping block 3 and a second clamping block 4, wherein the first clamping block 3 and the second clamping block 4 are respectively provided with a first clamping port 5 and a second clamping port 6 on one side close to each other; further comprising a strip of brittle stone 33 to be subjected to a bending moment test, wherein both ends of the strip of brittle stone 33 are respectively movably clamped into the first clamping port 5 and the second clamping port 6, further comprising a gravity pressure roller 24, wherein the gravity pressure roller 24 is tangent to the midpoint of the strip of brittle stone 33, and further comprising a counterweight unit, wherein the gravity of the counterweight unit is transmitted to the tangent point between the gravity pressure roller 24 and the strip of brittle stone 33 through the gravity pressure roller 24, thereby applying a bending moment to the strip of brittle stone 33; Figure 4 In this embodiment, a broken stone barrier strip 29 is arranged parallel to the lower side of the strip-shaped brittle stone 33, and the two ends of the broken stone barrier strip 29 are respectively fixedly connected to the first clamping block 3 and the second clamping block 4, and a broken gap 80 is formed between the broken stone barrier strip 29 and the strip-shaped brittle stone 33, so that the broken stone barrier strip 29 prevents the strip-shaped brittle stone 33 from falling directly after breaking;

[0024] like Figure 3 , and also includes an arcuate bar 31 with a horizontal axis, and the driving unit can drive the arcuate bar 31 to rotate along its own axis; the clockwise end and the counterclockwise end of the arcuate bar 31 are respectively fixedly connected to the first clamping block 3 and the second clamping block 4, so that the strip of brittle stone 33 and the arcuate bar 31 are combined into a bowstring structure; the inner wall of the arcuate bar 31 is arrayed with transmission teeth 30 along the arc direction, and also includes a driving gear 19, the driving gear 19 is engaged with the transmission teeth 30, so as to drive the arcuate bar 31 to rotate along its own axis; the axis of the gravity pressure roller 24 coincides with the axis of the arcuate bar 31, so that the arcuate bar 31 can rotate at any angle along its own axis, and the tangent point of the gravity pressure roller 24 on the strip of brittle stone 33 does not change, thereby improving the consistency of other conditions of the test.

[0025] like Figure 4 Assume that the strip of brittle stone 33 is in a horizontal state in the initial state. When the strip of brittle stone 33 is in a horizontal state, the pressure of the gravity pressure roller 24 at the tangent point of the strip of brittle stone 33 is recorded as G. If the arc-shaped circular arc strip 31 rotates a° along its own axis, as shown in FIG. Figure 5 , and the range of a° is 0°≤a°<90°, the position of the tangent point of the gravity pressure roller 24 on the strip-shaped brittle stone 33 does not change, such as Figure 6At this time, the reaction force of the gravity pressure roller 24 on the pressure at the tangent point of the strip brittle stone 33 is recorded as F; the F vector is decomposed into the horizontal component F2 and the longitudinal component F1; satisfying |F1|=|G|, and |F|=|G| / cos(a°).

[0026] The counterweight unit includes a columnar counterweight body 25, the lower end of which is fixedly connected to a parallel and vertical first guide column 9 and a second guide column 10, the lower ends of which are connected to a structural block 26, a roller seat 27 is fixedly arranged on the lower side of the structural block 26, and a gravity pressure roller 24 is rotatably mounted on the roller seat 27; a first pair of guide wheels 1 and a second pair of guide wheels 2 are respectively arranged on the side away from each other of the first guide column 9 and the second guide column 10; the wheel grooves on the first pair of guide wheels 1 are rollingly matched with the first guide column 9, and the wheel grooves on the second pair of guide wheels 2 are rollingly matched with the second guide column 10; thereby, the first guide column 9 and the second guide column 10 can only move up and down under the constraints of the first pair of guide wheels 1 and the second pair of guide wheels 2;

[0027] The motor 16 is also included. The motor bracket 20 of the motor 16 is fixed on the bearing seat 12. The end of the output shaft 17 of the motor 16 is coaxially fixedly connected to the driving gear 19. The outer ring of the output shaft 17 is coaxially provided with a brake ring 14. The inner ring of the brake ring 14 is fixedly connected to the brake ring 14 through a plurality of connecting arms 18. An arc brake pad 22 is arranged above the brake ring 14. The inner diameter of the arc of the arc brake pad 22 is consistent with the outer diameter of the brake ring 14. There is a gap 40 between the arc brake pad 22 and the outer ring of the brake ring 14. Figure 7 The arc brake pad 22 is fixedly connected to the structural block 26 through the synchronous arm 23. When the strip of brittle stone 33 breaks under the action of the bending moment force applied by the gravity pressure roller 24, the gravity pressure roller 24 drops due to the loss of F1. The drop of the structural block 26 drives the arc brake pad 22 to drop to the locking brake ring 14, so that the output shaft 17 and the driving gear 19 cannot rotate. In order to prevent the motor from burning out due to the sudden stop of the movement rotor, a torque sensor is provided on the output shaft 17. When the torque sensor senses that the torque of the output shaft 17 suddenly increases, the motor 16 is immediately powered off.

[0028] It also includes a fixedly installed bearing seat 12, in which a central axis 28 is rotatably installed in a bearing hole 13 on the bearing seat 12, and the central axis 28 is fixedly connected to the first clamping block 3 and the second clamping block 4 through the first rocker arm 7 and the second rocker arm 8 respectively, so that the arc-shaped arc bar 31 is coaxially synchronized with the central axis 28; it also includes a fixed arm 11, on which the bearing seat 12 is fixed, and the wheel axles of the first pair of guide wheels 1 and the second pair of guide wheels 2 are both fixed on the fixed arm 11; a lifting arm 36 is fixed to one side of the bottom of the cylindrical counterweight body 25, and a hydraulic lifter 34 is also fixedly installed on the fixed arm 11, and the top head of the hydraulic lifting push rod 35 of the hydraulic lifter 34 can press the lifting arm 36 upward, thereby raising the lifting arm 36 and the cylindrical counterweight body 25, which is used to lift the counterweight unit in the initial state.

[0029] It also includes an arc-shaped scale bar 21 coaxial with the outside of the arc-shaped arc bar 31; the clockwise end of the arc-shaped scale bar 21 is fixedly connected to the motor bracket 20 through the connecting arm 15; the arc-shaped scale bar 21 is provided with angle scale lines along the clockwise direction of the arc, and when the strip of brittle stone 33 is horizontal, a vertical downward pointed indicator arrow 32 is fixed to the bottom end of the arc-shaped arc bar 31, and the pointed indicator arrow 32 corresponds to the starting scale line of the arc-shaped scale bar 21.

[0030] Working principle and method:

[0031] Initial state settings:

[0032] The top of the hydraulic lifting push rod 35 can press upward and hold the lifting arm 36, so that the gravity of the counterweight unit is borne entirely by the hydraulic lifting push rod 35, so that the gravity pressure roller 24 is suspended, and the axis of the gravity pressure roller 24 is higher than the axis of the central axis 28; the two ends of a strip of brittle stone 33 waiting for the bending moment test are respectively inserted into the first bayonet 5 and the second bayonet 6, and in the initial state, the strip of brittle stone 33 with two ends respectively inserted into the first bayonet 5 and the second bayonet 6 is in a horizontal state; the pointed indicator arrow 32 corresponds to the starting zero scale line of the arc-shaped scale bar 21;

[0033] Bending moment damage resistance test process:

[0034] The hydraulic lifting push rod 35 is controlled to slowly retract downward, and the suspended gravity pressure roller 24 gradually descends, until the gravity pressure roller 24 descends to the same axis as the arc strip 31, and the gravity pressure roller 24 is just tangent to the midpoint of the strip of brittle stone 33, so that the gravity pressure roller 24 and the columnar counterweight 25 cannot continue to descend, and the hydraulic lifting push rod 35 continues to retract downward, so that the top of the hydraulic lifting push rod 35 is separated from the lifting arm 36, so that the columnar counterweight 25, the structural block 26, the lifting arm 36, and the synchronous arm 2 The gravity of the arc brake pad 22 and the gravity pressure roller 24 are transmitted to the tangent point between the gravity pressure roller 24 and the strip of brittle stone 33 through the gravity pressure roller 24, forming a bending moment on the strip of brittle stone 33; since the sum of the gravity of the columnar counterweight 25, the structural block 26, the lifting arm 36, the synchronous arm 23, the arc brake pad 22 and the gravity pressure roller 24 is known, when the strip of brittle stone 33 is in a horizontal state, the pressure G of the gravity pressure roller 24 at the tangent point of the strip of brittle stone 33 is a pre-set known critical value;

[0035] If the tangent point of the strip-shaped brittle stone 33 is under the condition of pressure G, the strip-shaped brittle stone 33 will directly break (break), indicating that the strip-shaped brittle stone 33 is a defective product, and further experiments are directly abandoned;

[0036] If the tangent point of the strip-shaped brittle stone 33 does not break under the pressure of G, it means that the strip-shaped brittle stone 33 is qualified. If it is necessary to further judge the ultimate bending resistance of the strip-shaped brittle stone 33, proceed to the next step;

[0037] At this time, the control motor 16 outputs a constant power, so that the driving gear 19 drives the arc strip 31 to rotate slowly clockwise along its own axis under the action of meshing transmission, and the pointed indicator arrow 32 moves slowly along the path of the arc scale bar 21. Assuming that the scale on the arc scale bar 21 indicated by the pointed indicator arrow 32 is a°, it means that the arc strip 31 has rotated a° clockwise relative to the initial state, where the range of a° is 0°≤a°<90°. Since the strip of brittle stone 33 is a brittle material, the elastic deformation that occurs can be ignored. Therefore, the axis of the gravity pressure roller 24 and the axis of the arc strip 31 are always basically coincident. Therefore, during the process of the arc strip 31 rotating at any angle along its own axis, the tangent point of the gravity pressure roller 24 on the strip of brittle stone 33 does not change. The reaction force of the gravity pressure roller 24 on the pressure at the tangent point of the strip of brittle stone 33 is denoted as F. Figure 6, decompose the F vector into a horizontal force F2 and a longitudinal force F1; according to the force balance principle and geometric relationship, |F1|=|G|, and |F|=|G| / cos(a°); therefore, in the interval of 0°≤a°<90°, the larger the value of a° is, the larger the value of |F| is, and the value of |F| is just the vertical pressure on the tangent point of the strip-shaped brittle stone 33; therefore, as the value of a° gradually increases, the vertical pressure on the tangent point of the strip-shaped brittle stone 33 is also increasing. When the vertical pressure on the tangent point of the strip-shaped brittle stone 33 reaches a certain value, the strip-shaped brittle stone 33 instantly breaks (breaks) at the cutoff point. When the strip-shaped brittle stone 33 breaks at the cutoff point, the gravity pressure roller 24 drops rapidly due to the loss of F1, The descent of the structural block 26 drives the arc brake pad 22 to descend to the locking brake ring 14. (Since the gap 40 is very small in the initial state, once the structural block 26 descends, the arc brake pad 22 will immediately follow and descend to the locking brake ring 14, making the output shaft 17 and the driving gear 19 unable to rotate. Since the output shaft 17 is suddenly braked and stopped, the torque sensor on the output shaft 17 senses that the torque of the output shaft 17 suddenly increases, and then the controller calls the control motor (16) to immediately cut off the power. The scale a° on the arc scale bar 21 pointed by the pointed indicator arrow (32) is substituted into the formula |F|=|G| / cos(a°) for calculation, and the limit pressure that this strip of brittle stone (33) can withstand at the tangent point is obtained as |F|;

[0038] In order to further distinguish the ultimate bending resistance of the strip brittle stone 33, the following classification is introduced:

[0039] If the strip-shaped brittle stone 33 breaks within the range of 0°≤a°<30°, it means that the strip-shaped brittle stone 33 is a low-grade product in terms of bending resistance;

[0040] If the strip-shaped brittle stone 33 breaks within the range of 30°≤a°<60°, it means that the strip-shaped brittle stone 33 is a medium-grade product in terms of bending resistance;

[0041] If the strip-shaped brittle stone 33 breaks within the range of 60°≤a°<90°, it means that the strip-shaped brittle stone 33 is a high-grade product with good bending resistance.

[0042] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. Test system for material properties of bending moment resistance of strip brittle stone, Characterized in that: It includes a first clamping block (3) and a second clamping block (4), and a first clamping opening and a second clamping opening are respectively arranged on one side of the first clamping block and the second clamping block close to each other; it also includes a strip brittle stone (33) to be tested for bending moment resistance, and both ends of the strip brittle stone (33) are respectively clamped into the first clamping opening (5) and the second clamping opening (6), and it also includes a gravity pressure roller (24), and the gravity pressure roller (24) is tangent to the midpoint of the strip brittle stone (33), and it also includes a counterweight unit, and the gravity of the counterweight unit is transmitted to the tangent point of the gravity pressure roller (24) and the strip brittle stone (33) through the gravity pressure roller (24); It also includes a bow-shaped arc strip (31) with a horizontal axis, and a driving unit can drive the bow-shaped arc strip (31) to rotate along its own axis; the clockwise end and the counterclockwise end of the bow-shaped arc strip (31) are respectively fixedly connected to the first clamping block (3) and the second clamping block (4), so that the strip brittle stone (33) and the bow-shaped arc strip (31) are combined into a bowstring structure; Driving teeth (30) are arrayed along the arc direction on the inner wall of the bow-shaped arc strip (31), and it also includes a driving gear (19), and the driving gear (19) meshes with the driving teeth (30), so as to drive the bow-shaped arc strip (31) to rotate along its own axis; The axis of the gravity pressure roller (24) coincides with the axis of the bow-shaped arc strip (31), so that the bow-shaped arc strip (31) rotates at any angle along its own axis, and the tangent point of the gravity pressure roller (24) on the strip brittle stone (33) does not change; when the strip brittle stone (33) is in a horizontal state: the pressure at the tangent point of the gravity pressure roller (24) on the strip brittle stone (33) is denoted as G, if the bow-shaped arc strip (31) rotates a° along its own axis, and the range of a° is 0°≤a°<90°, at this time, the reaction force of the pressure of the gravity pressure roller (24) on the tangent point of the strip brittle stone (33) is denoted as F; the horizontal component force F2 and the longitudinal component force F1 decomposed from the F vector; satisfy |F1| = |G|, and |F| = |G| / cos(a°).

2. The test system for material properties of bending moment resistance of strip brittle stone according to claim 1, Characterized in that: The counterweight unit comprises a columnar counterweight body (25), the lower end of which is fixedly connected to a first guide column (9) and a second guide column (10) which are parallel and vertical, the lower ends of which are connected to a structural block (26), the lower side of which is fixedly provided with a roller seat (27), the gravity pressure roller (24) being rotatably mounted on the roller seat (27); a first pair of guide wheels (1) and a second pair of guide wheels (2) are respectively provided on the side of the first guide column (9) and the second guide column (10) which are away from each other; the wheel grooves on the first pair of guide wheels (1) are in rolling engagement with the first guide column (9), and the wheel grooves on the second pair of guide wheels (2) are in rolling engagement with the second guide column (10); thereby, the first guide column (9) and the second guide column (10) can only move up and down under the constraints of the first pair of guide wheels (1) and the second pair of guide wheels (2); and a motor (16) is further provided, the output of which is The end of the output shaft (17) is coaxially fixedly connected to the driving gear (19); a brake ring (14) is coaxially arranged on the outer ring of the output shaft (17); the inner ring of the brake ring (14) is fixedly connected to the brake ring (14) via a plurality of connecting arms (18); an arc brake pad (22) is arranged above the brake ring (14); the arc inner diameter of the arc brake pad (22) is consistent with the outer diameter of the brake ring (14); and the arc brake pad (22) and the outer ring of the brake ring (14) are spaced apart from each other. There is a gap (40); the arc brake pad (22) is fixedly connected to the structural block (26) through the synchronous arm (23); when the strip of brittle stone (33) breaks under the action of the bending moment force applied by the gravity pressure roller (24), the gravity pressure roller (24) falls due to the loss of support from F1, and the descent of the structural block (26) drives the arc brake pad (22) to fall until it locks the brake ring (14), so that the output shaft (17) and the drive gear (19) cannot rotate.

3. The testing system for the bending moment resistance material properties of strip brittle stone according to claim 2, Features: The output shaft (17) is provided with a torque sensor, and when the torque sensor senses that the torque of the output shaft (17) suddenly increases, the motor (16) is immediately powered off.

4. The testing system for the moment-bending material properties of strip brittle stone according to claim 3, Features: It also includes an arc-shaped scale bar (21) coaxially arranged outside the arc-shaped arc bar (31); the arc-shaped scale bar (21) is provided with angle scale lines along the clockwise direction of the arc; when the strip of brittle stone (33) is horizontal, a vertical downward pointed indicating arrow (32) is fixed at the bottom end of the arc-shaped arc bar (31), and the pointed indicating arrow (32) corresponds to the starting zero scale line of the arc-shaped scale bar (21).

5. The test method of the test system for the moment-resistant material properties of strip brittle stone according to claim 4, Features: In the initial state, the pointed indicator arrow (32) corresponds to the starting zero scale line of the arc-shaped scale bar (21); the strip of brittle stone (33) is in a horizontal state, and the pressure G of the gravity pressure roller (24) at the intersection of the strip of brittle stone (33) is a known critical value; if the intersection of the strip of brittle stone (33) is under the pressure G, the strip of brittle stone (33) will directly break, indicating that the strip of brittle stone (33) is a defective product, if the strip of brittle stone (33) is not broken; the arc-shaped strip (31) slowly rotates clockwise along its own axis, the scale on the arc-shaped scale bar (21) pointed by the pointed indicator arrow (32) is a°, and the scale on the arc-shaped scale bar (21) pointed by the pointed indicator arrow (32) is a°. Substitute into the formula | F | = | G| / cos(a°) is calculated, and the pressure at the tangent point of the strip-shaped brittle stone (33) is obtained to be |F|; if the strip-shaped brittle stone (33) breaks in the interval of 0°≤a°<30°, it means that the strip-shaped brittle stone (33) is a low-grade product in terms of bending resistance; if the strip-shaped brittle stone (33) breaks in the interval of 30°≤a°<60°, it means that the strip-shaped brittle stone (33) is a medium-grade product in terms of bending resistance; if the strip-shaped brittle stone (33) breaks in the interval of 60°≤a°<90°, it means that the strip-shaped brittle stone (33) is a high-grade product in terms of bending resistance.

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