Rock cutting strength testing device

Abstract

The utility model discloses a rock anti-cutting strength testing device. The cross section of the inner diameter of a shell is square, a supporting seat is arranged in the center of the interior of the shell, four groups of clamping assemblies are connected to the vertical face of the inner side of the shell in a sliding mode, and a right-angle notch is formed in the side, close to the supporting seat, of a right-angle limiting piece. Through the arrangement of the right-angle limiting pieces, the right-angle notches are formed in the sides, close to the supporting bases, of the right-angle limiting pieces, the second oil cylinders of the four clamping assemblies drive the right-angle limiting pieces to gather towards the center of the shell at the same time, and under the condition that the driving lengths of the second oil cylinders are all the same, the right-angle limiting pieces are clamped; the rock sample with the square top surface is extruded and fixed by the right-angle limiting pieces in the four directions, the right-angle notches of the right-angle limiting pieces are equivalent to each right-angle limiting piece to limit the positions of the rock sample in the two directions, and the four groups of right-angle limiting pieces can limit eight positions in the four directions; and the firmness degree of fixing the rock sample by the clamping assembly is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to rock test technical field, concretely is a kind of rock cutting resistance strength testing device. BACKGROUND

[0002] The cutting resistance strength of rock refers to the ability of rock to resist shear failure, which is usually measured by the shear strength of rock. Rock strength test is mainly used to evaluate the strength characteristics of rock under different stress states. These strength characteristics are important for understanding the mechanical properties of rock, evaluation, engineering design, mining, geotechnical engineering and rock mechanics research.

[0003] The existing rock cutting resistance strength testing device is not firm enough for clamping and fixing rock samples. In the cutting strength test, if the rock sample is slightly offset, it will also produce errors in the results, affecting the accuracy of rock cutting strength test data. UTILITY MODEL CONTENT

[0004] The utility model aims at providing a rock cutting resistance strength testing device to solve the above problems in the background art. The existing rock cutting resistance strength testing device is not firm enough for clamping and fixing rock samples. In the cutting strength test, if the rock sample is slightly offset, it will also produce errors in the results, affecting the accuracy of rock cutting strength test data.

[0005] To achieve the above purpose, the utility model provides the following technical scheme: a rock cutting resistance strength testing device, including shell, cutting assembly and clamping assembly, the inner diameter cross section of shell is square, one side of shell is connected with cutting assembly connecting frame, cutting assembly connecting frame bottom installs cutting assembly, the inside center of shell is provided with support seat, clamping assembly is slidably connected on the inner side of shell, clamping assembly is provided with four groups, and the center of four groups of right angle limit pieces is symmetrical about the center of shell, clamping assembly includes right angle limit piece, the side close to support seat of right angle limit piece is provided with right angle notch, the center of four groups of right angle limit pieces and the center of support seat and the output end of cutting assembly are all on the same axis.

[0006] Preferably, four clamping assemblies are distributed at four corners of the inner side of the shell, and the two sides of the corner of the shell connected with the clamping assembly form a 45-degree angle with the clamping assembly.

[0007] Preferably, the clamping assembly further includes a second oil cylinder, the body of the second oil cylinder is fixedly connected at the inner corner of the shell, and the output end of the second oil cylinder is connected with the right angle limit piece.

[0008] Preferably, the right angle notch surface of the right angle limit piece is connected with a gasket.

[0009] Preferably, the cutting assembly comprises a first oil cylinder, a push plate and a cutting head, the body of the first oil cylinder is fixed to the bottom of the cutting assembly connecting frame, the output end of the first oil cylinder is connected to the push plate, the side of the push plate away from the first oil cylinder is provided with the cutting head, and the cutting head is on the same axis as the centers of the four clamping assemblies.

[0010] Preferably, the cutting assembly further comprises an infrared range finder, and the infrared range finder is arranged on the side of the push plate close to the first oil cylinder.

[0011] Preferably, the support seat is arranged in multiple groups of support seat single layers arranged in upper and lower layers, the bottom of each support seat single layer is provided with a positioning protrusion, and the upper surface of each support seat single layer is provided with a positioning hole.

[0012] Preferably, each support seat single layer is in a prismatic structure, and the top surface of a lower layer support seat single layer is the same in size as the bottom surface of an upper layer support seat single layer.

[0013] Preferably, the bottom of the shell is open and fixedly connected to a bottom layer seat, the center of the bottom layer seat is provided with a support seat base, the bottom of the support seat is fixedly connected to the upper surface of the support seat base, and the two sides of the bottom layer seat are open and respectively connected to two groups of collecting boxes.

[0014] Preferably, the upper surface of the shell is provided with a protective cover.

[0015] Compared with the prior art, the rock cutting resistance strength testing device has the following beneficial effects:

[0016] The four clamping assemblies are slidably connected to the four corners of the inner side of the shell, the two sides of the corner of the shell connected to the clamping assembly form a 45-degree angle with the clamping assembly, the side of the right-angle limiting piece close to the support seat is provided with a right-angle notch, the second oil cylinders of the four clamping assemblies simultaneously drive the right-angle limiting piece to gather towards the center of the shell, the rock sample with a square top surface is extruded and fixed by the right-angle limiting pieces in four directions, the right-angle limiting piece limits the four corners of the rock sample, and the right-angle notch of the right-angle limiting piece limits the positions of the rock sample in two directions, so that the four right-angle limiting pieces can limit the positions in four directions and eight positions, and the firmness of the clamping assembly in fixing the rock sample is improved. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 It is a structural schematic view of the rock cutting resistance strength testing device.

[0018] Figure 2This is a schematic diagram of the support structure of this utility model.

[0019] Figure 3 This is a schematic diagram of the distribution structure of the clamping components of this utility model.

[0020] Figure 4 This is a top view showing the distribution of the clamping components of this utility model.

[0021] Figure 5 This is a schematic diagram of the clamping component structure of this utility model.

[0022] Figure 6 This is a schematic diagram of the cutting component structure of this utility model.

[0023] Figure 7 This is a schematic diagram of the bottom base and collection box structure of this utility model.

[0024] In the diagram: 1. Shell; 11. Bottom base; 111. Support base; 12. Collection box; 2. Cutting component connecting frame; 3. Cutting component; 31. First hydraulic cylinder; 32. Push plate; 33. Cutting head; 34. Infrared rangefinder; 4. Support base; 41. Single layer of support base; 411. Positioning protrusion; 412. Positioning hole; 5. Clamping component; 51. Second hydraulic cylinder; 52. Right angle limiter; 53. Gasket; 6. Protective cover. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0026] One embodiment provided by this utility model: as follows Figure 1 As shown, a rock cutting resistance testing device includes a shell 1, a cutting component connecting frame 2, a cutting component 3, a support base 4, a clamping component 5, and a protective cover 6.

[0027] like Figure 2As shown, the inner diameter cross section of the shell 1 is square, and a support seat 4 is arranged in the center of the shell 1. The support seat 4 is arranged by a plurality of groups of support seat single layers 41 arranged in layers. The bottom of the support seat single layer 41 is provided with a positioning protrusion 411, and the upper surface of the support seat single layer 41 is provided with a positioning hole 412. The positioning hole 412 of the adjacent lower layer support seat single layer 41 corresponds in position and is matched in size with the positioning protrusion 411 of the upper layer support seat single layer 41. The support seat single layer 41 of the support seat 4 is a prism structure, and the top surface of the lower layer support seat single layer 41 is the same size as the bottom surface of the upper layer support seat single layer 41. The bottom surface of the lowermost layer support seat single layer 41 is at the same height as the bottom of the shell 1.

[0028] The top surface of the common test rock sample is square of different sizes. Before the cutting resistance test of the rock, the rock sample needs to be placed on the support seat 4. In order to reduce the influence of the thickness specification of different rock samples on the cutting height position, the height of the support seat 4 can be adjusted according to the thickness of the rock sample, so as to conveniently reduce the up-down moving range of the cutting assembly 3, so that the measurement of the rock cutting change is more accurate. At the same time, it can ensure that the center height of the rock sample of different heights is always matched with the center height of the clamping assembly 5, and the stability of the clamping assembly 5 during cutting is improved.

[0029] By adjusting the number of support seat single layers 41, the height of the support seat 4 can be changed. Due to the connection mode of the positioning protrusion 411 and the positioning hole 412, the positions of the adjacent support seat single layers 41 in the horizontal direction are relatively fixed, and it is not easy to produce deviation when the upper rock sample is cut. At the same time, the structure of the support seat 4 combined by a plurality of groups of support seat single layers 41 is increased with the increase of the bottom surface area of the downward layer-by-layer support seat single layer 41, which increases the stability of the support seat 4 supporting the upper rock sample when it is cut.

[0030] As shown in Figure 3 , Figure 4 and Figure 5 , the clamping assembly 5 is provided with four groups, which are symmetric about the center of the shell 1. The four groups of clamping assemblies 5 are slidingly connected to the four corners of the inner side of the shell 1. The two sides of the corner of the shell 1 connected with the clamping assembly 5 form a 45-degree angle with the clamping assembly 5. The clamping assembly 5 includes a second oil cylinder 51 and a right-angle limiting piece 52. The body of the second oil cylinder 51 is fixedly connected to the position of the inner corner of the shell 1. The output end of the second oil cylinder 51 is connected to the right-angle limiting piece 52. The side close to the support seat 4 of the right-angle limiting piece 52 is provided with a right-angle notch. The surface of the right-angle notch of the right-angle limiting piece 52 is connected with a gasket 53.

[0031] The centers of the four groups of right-angle limiting pieces 52, the center of the support seat 4 and the output end of the cutting assembly 3 are all on the same axis.

[0032] The clamping assembly 5 is used to stably fix the rock sample placed above the support seat 4. The second oil cylinder 51 of the four clamping assemblies 5 is simultaneously driven to drive the right-angle limiting piece 52 to gather towards the center of the shell 1. In the case that the driving length of the second oil cylinder 51 is the same, the rock sample with a square top surface is extruded and fixed by the right-angle limiting piece 52 in four directions. The right-angle limiting piece 52 limits the four corners of the rock sample, and the right-angle gap of the right-angle limiting piece 52 corresponds to the position limitation of the rock sample in two directions. The four right-angle limiting pieces 52 limit the position in eight directions, thereby improving the fixing firmness of the rock sample by the clamping assembly 5. The gasket 53 of each clamping assembly 5 is tightly attached to the rock sample, thereby increasing the contact area and the friction between the clamping assembly 5 and the rock sample.

[0033] As shown in Figure 1 and Figure 6 , one side of the shell 1 is connected with the cutting assembly connecting frame 2, and the cutting assembly 3 is installed at the bottom of the cutting assembly connecting frame 2. The cutting assembly 3 comprises a first oil cylinder 31, a push plate 32, a cutting head 33 and an infrared distance meter 34. The body of the first oil cylinder 31 is fixed to the bottom of the cutting assembly connecting frame 2, the output end of the first oil cylinder 31 is connected with the push plate 32, the cutting head 33 is installed on the side of the push plate 32 away from the first oil cylinder 31, the cutting head 33 is on the same axis as the center of the four clamping assemblies 5, and the infrared distance meter 34 is installed on the side of the push plate 32 close to the first oil cylinder 31.

[0034] As shown in Figure 1 , the protective cover 6 is installed above the shell 1. The protective cover 6 is installed before the cutting operation, so that the flying rock particles in the cutting state will not fly out to harm the workers.

[0035] The cutting assembly 3 is located above the rock sample. Under the driving action of the first oil cylinder 31, the cutting head 33 can cut the surface of the rock sample. Before the cutting operation, the first oil cylinder 31 drives the cutting head 33 to abut against the position to be cut. At this time, the infrared distance meter 34 measures and records the first data. Then, the first oil cylinder 31 is driven multiple times, the load of each driving is gradually increased, and after each driving, the infrared distance meter 34 records the data when the cutting head 33 destroys the rock sample to the farthest distance. The difference between the data and the previous data is the shearing distance of the rock sample each time. According to the formula of the shear strength of the rock, the cutting strength of the test rock sample can be obtained.

[0036] The right-angle limiting piece 52 keeps the center of the rock sample, the center of the support seat 4 and the output end of the cutting assembly 3 on the same axis, so that the cutting of the rock sample on the axis is the most stable, the part of the rock sample on the axis is balanced by the force of the clamping assembly 5 in the transverse direction and the force of the support seat 4 and the pressure of the cutting head 33 in the longitudinal direction, the influence of other factors on the test is reduced, and the stability of the test data is increased.

[0037] As shown in Figure 7 The bottom of the shell 1 is open and fixedly connected with the bottom layer seat 11, the center of the bottom layer seat 11 is provided with a support seat base 111, the bottom of the support seat 4 is fixedly connected above the support seat base 111, the bottom layer seat 11 is open on both sides and is respectively inserted and connected with two groups of collection boxes 12, and the collection boxes 12 are provided with notches at positions corresponding to the support seat base 111.

[0038] During the cutting resistance test, the debris of the rock surface broken off falls into the two groups of collection boxes 12 around the support seat 4, after the test is completed, the two groups of collection boxes 12 are pulled outwards, so that the debris can be cleaned, and the accumulation of the debris in the test device is effectively avoided.

[0039] The above is only an embodiment of the present application, and the well-known specific structures and properties and other common knowledge in the scheme are not described in detail. For those skilled in the art, it is obvious that the present application is not limited to the details of the above exemplary embodiments, and the present application can be realized in other specific forms without departing from the spirit or basic characteristics of the present application. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting, the scope of the present application is defined by the appended claims rather than the above description, and therefore all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present application. Any reference signs in the claims should not be regarded as limiting the claims.

Claims

1. A rock cut resistance strength testing apparatus, characterized by: The utility model provides a cutting device, including shell (1), cutting assembly (3) and clamping assembly (5), the inner diameter cross section of shell (1) is square, one side of shell (1) is connected cutting assembly connecting frame (2), cutting assembly connecting frame (2) bottom installs cutting assembly (3), the inside center of shell (1) is provided with support seat (4), clamping assembly (5) is connected in the inside vertical surface of shell (1) slidingly, clamping assembly (5) is provided with four groups, is about the center symmetry of shell (1) respectively, clamping assembly (5) includes right angle stop piece (52), right angle stop piece (52) is provided with right angle gap on the side close to support seat (4), and the center of four groups right angle stop piece (52) and the center of support seat (4) and the output end of cutting assembly (3) are all on same axis.

2. A device for testing the cutting resistance of rock according to claim 1, characterized in that: Four groups clamping assembly (5) are distributed in the four corners of the inside of shell (1), and the two sides of the corner of shell (1) connected with clamping assembly (5) are at 45 degrees with clamping assembly (5).

3. A device for testing the cutting resistance of rock according to claim 2, characterized in that: The clamping assembly (5) further includes a second oil cylinder (51), the body of the second oil cylinder (51) is fixedly connected to the inner corner of the shell (1), and the output end of the second oil cylinder (51) is connected to the right angle limiting piece (52).

4. The apparatus of claim 1, wherein: The right angle gap surface of the right angle limiting piece (52) is adhesively connected to a gasket (53).

5. The apparatus of claim 1, wherein: The cutting assembly (3) includes a first oil cylinder (31), a push plate (32), and a cutting head (33), the body of the first oil cylinder (31) is fixed to the bottom of the cutting assembly connecting frame (2), the output end of the first oil cylinder (31) is connected to the push plate (32), the push plate (32) is installed with the cutting head (33) on the side away from the first oil cylinder (31), and the cutting head (33) is on the same axis as the center of the four clamping assemblies (5).

6. A rock cut resistance strength testing apparatus as claimed in claim 5, wherein: The cutting assembly (3) further includes an infrared range finder (34) installed on the side of the push plate (32) close to the first oil cylinder (31).

7. The apparatus of claim 1, wherein: The support seat (4) is arranged in multiple groups of support seat single layers (41) arranged in an up-down manner, the bottom of the support seat single layer (41) is provided with a positioning protrusion (411), and the upper surface of the support seat single layer (41) is provided with a positioning hole (412).

8. A rock cut resistance strength testing apparatus as claimed in claim 7, wherein: The support seat single layers (41) of the support seat (4) are all prismatic structures, and the top surface of the lower support seat single layer (41) is the same in size as the bottom surface of the upper support seat single layer (41).

9. A rock cut resistance strength testing apparatus as claimed in claim 7, wherein: The bottom of the shell (1) is open and fixedly connected to a bottom seat (11), the center of the bottom seat (11) is provided with a support seat base (111), the bottom of the support seat (4) is fixedly connected to the top of the support seat base (111), and the two sides of the bottom seat (11) are open and respectively connected to two groups of collection boxes (12), and the collection boxes (12) are provided with gaps at the corresponding positions of the support seat base (111).

10. The apparatus of claim 1, wherein: The top of the shell (1) is installed with a protective cover (6).

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