Testing device for quantitatively controlling moisture content of rock

Abstract

The utility model relates to the field of rock tests, in particular to a test device for quantitatively controlling the moisture content of rock. Comprising a supporting structure, a sample assembly, an electronic scale and a vacuum pump, the supporting structure comprises a supporting base, supporting legs and an adjusting piece. The adjusting part is used for leveling the supporting seat; the electronic scale adopts a high-precision electronic scale; the sample assembly comprises a glass cylinder, an acrylic sleeve, a sample block, a sealing ring and a rubber membrane; the acrylic sleeve is connected with the electronic scale through a hoisting piece and completes electronic weighing operation, one side of the acrylic sleeve is further connected with an installation air pipe, and the air pipe is connected with the vacuum pump through a guide pipe; the sample block is arranged in the acrylic sleeve, and the sealing ring is installed on the sample block in a sleeving mode and makes contact with the inner wall of the acrylic sleeve in a pressing mode. The device is simple in structure, convenient to operate, easy to disassemble and low in cost, the moisture content of the rock is quantitatively controlled, and the test efficiency of the moisture content of the rock is improved through mass comparison before and after the test.

Description

Technical Field

[0001] The utility model relates to the technical field of rock testing, in particular to a testing device for quantitatively controlling the water content of rocks. Background Art

[0002] The effect of water is often an important factor causing rock deformation and failure, so studying the hydraulic properties of rocks is of great significance for revealing the rock deformation and failure mechanism. Many scholars at home and abroad have studied the hydraulic properties of rocks, and existing studies have shown that with the increase of water content, the mechanical properties of rocks will deteriorate significantly.

[0003] When studying the hydraulic properties of rocks, water content is an important control indicator. In the process of studying the physical and mechanical properties of rocks under different water contents, the drying and saturation processes are relatively easy to control, but the water content under unsaturated conditions is usually difficult to control. At present, the change of water content is mostly controlled by immersion time. This method can control the water content of rocks to a certain extent by the length of immersion time, but there are problems such as the water content cannot be quantitatively expressed, it takes a long time, and the water content is unevenly distributed in the rock. In 2016, some scholars proposed a method of controlling the water content by air drying. This method requires the rock to be saturated before dehydration. During the saturation-dehydration process, the internal structure of the rock will be damaged to a certain extent and there is still the problem of uneven water content distribution, which cannot accurately reveal the physical and mechanical properties of the rock at different water contents. At present, the best method to control the water content is to reshape the rock, but the reshaped rock destroys the original internal structure to a certain extent.

[0004] Therefore, when studying the physical and mechanical properties of rocks at different water contents, how to quantitatively control the water content of rocks is an urgent problem to be solved. There is an urgent need for a low-cost device with a simple structure, easy operation and easy disassembly to achieve quantitative control of the water content of rocks. Summary of the invention

[0005] In order to solve the above-mentioned shortcomings and deficiencies in the use of the prior art rock moisture testing equipment, the utility model provides a test device for quantitatively controlling the moisture content of rock, which has a simple structure, is easy to operate, easy to disassemble, and low cost. It can achieve quantitative control of the moisture content of rock through a quantitative control device, and improve the efficiency of the rock moisture content test by comparing the quality before and after during the test.

[0006] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a test device for quantitatively controlling the water content of rocks, the test device comprising a support structure, a sample assembly, an electronic scale and a vacuum pump; the support structure comprises a support seat, support legs and an adjusting member; the support seat is distributed on the left and right, and a through hole is opened in the center; the support legs are arranged vertically downward on the support seat, and the adjusting member is used to complete the leveling operation of the support seat; the electronic scale adopts a high-precision electronic scale, and is placed on the support seat and corresponds to the through hole; the sample assembly comprises a glass cylinder, an acrylic sleeve, a sample block, a sealing ring and a rubber film; the glass cylinder is arranged on the support seat Below, the acrylic sleeve is a structure with two ends open, and is arranged in the glass tube, and the central axis of the glass tube, the acrylic sleeve and the through hole are kept consistent; the acrylic sleeve is connected to the electronic scale through a hanging piece, and the electronic weighing operation is completed, and an air pipe is also connected and installed on one side of the acrylic sleeve, and the air pipe is connected to the vacuum pump through a conduit; the sample block is arranged in the acrylic sleeve, and the sealing ring is installed on the sample block and is in pressure contact with the inner wall of the acrylic sleeve; the rubber membrane adopts a membrane structure with tiny pores, and the sealing ring and the rubber membrane are an integrated structure, and the rubber membrane is kept in close contact with the sample block to complete the pressing operation of the sample block.

[0007] As a preferred technical solution: the adjustment part includes a level detection sensor, an indicator light and an adjustment pin; the level detection sensor is fixedly installed at the bottom end of the support base; the indicator light is arranged on the support base and maintains a signal connection with the level detection sensor; the adjustment pin is connected to the support leg through a threaded rotation.

[0008] A further preferred technical solution: the indicator light includes a green light and a red light; when the green light indicates that the support base is in a horizontal state, and when the red light indicates that the support base needs to be adjusted to a horizontal state.

[0009] A further preferred technical solution is as follows: the rubber membrane is sleeved inside the inner wall of the sealing ring, and the two are integrally sealed and connected via an annular rubber band; and the sealing ring, the rubber membrane and the rubber band are two groups symmetrically distributed up and down.

[0010] As a preferred technical solution: the hanging part includes a fixing sleeve, a fixing ring, a hanging rod and a connecting arm; the fixing sleeve is installed on the upper end of the acrylic sleeve; the fixing ring is a plurality of ring-shaped evenly distributed ones, and is installed on the outside of the fixing sleeve; the hanging rod is a plurality of ring-shaped distributed ones, and one end is connected to the fixing ring through a hook, and the top ends of the plurality of hanging rods are connected into an integrated structure through a mounting seat, and a hook is provided on the mounting seat; one end of the connecting arm is connected to the electronic scale, and the other end is connected to the hook.

[0011] As a preferred technical solution: a mounting groove is further provided on one side of the support seat, and the vacuum pump is adapted to be installed in the mounting groove.

[0012] As a preferred technical solution: a U-shaped rubber clamp is also provided at the bottom end of the support seat for fitting and installing the conduit.

[0013] As a preferred technical solution: the acrylic sleeve is a cylindrical structure with large ends and a small middle.

[0014] Compared with the prior art, the utility model has the following beneficial effects: the test device has a simple structure, and through the cooperation of setting a level detection sensor, an indicator light and an adjustment pin, convenient and efficient level adjustment is achieved, the stability and levelness of the support seat as a test carrier support are guaranteed, and a strong foundation is provided for subsequent effective test measurements; the test device is easy to operate, easy to disassemble, and low in cost, and through the design of a glass tube, an acrylic sleeve, a sample block, a sealing ring and a rubber film, and a vacuum pump, the water content of the rock can be quantitatively controlled, and the change process of the water content of the rock can be observed during the test. After the test is completed, the water content of the rock can be calculated through the change in the indication of the electronic scale before and after the test, which greatly improves the test efficiency of the water content of the rock and is more practical. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0016] Figure 1 It is a stereoscopic diagram of the overall structure of the utility model.

[0017] Figure 2 It is a cross-sectional view of the overall structure of the utility model.

[0018] Figure 3 for Figure 2 A-section structure enlarged view.

[0019] Figure 4 It is a structural schematic diagram of the acrylic sleeve of the utility model.

[0020] In the figure: 1. Support structure; 11. Support seat; 12. Support leg; 13. Adjustment member; 14. Through hole; 15. Level detection sensor; 16. Indicator light; 17. Adjustment pin; 18. Green light; 19. Red light; 2. Sample assembly; 21. Glass tube; 22. Acrylic sleeve; 23. Sample block; 24. Sealing ring; 25. Rubber film; 26. Air pipe; 27. Catheter; 28. Rubber band; 3. Electronic scale; 4. Vacuum pump; 5. Lifting member; 51. Fixing sleeve; 52. Fixing ring; 53. Lifting rod; 54. Connecting arm; 55. Hook; 56. Mounting seat; 57. Hook; 6. Mounting groove; 7. Rubber clamp. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0022] In the description of the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", and "provided with" that may appear should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood by specific circumstances.

[0023] Example: Figures 1 to 4 As shown: a test device for quantitatively controlling the water content of rocks, the test device comprises a support structure 1, a sample assembly 2, an electronic scale 3 and a vacuum pump 4. Figure 1 As shown: the support structure 1 includes a support seat 11, support legs 12 and an adjustment member 13. The support seat 11 is distributed on the left and right, and a through hole 14 is opened in the center; it is used to establish a channel structure between the acrylic sleeve and the electronic scale. The support legs 12 are vertically distributed downwardly arranged on the support seat 11, and the adjustment member 13 is used to complete the leveling operation of the support seat 11. Specifically, as Figure 2As shown: the adjustment member 13 includes a level detection sensor 15, an indicator light 16 and an adjustment pin 17. The level detection sensor 15 is fixedly installed at the bottom of the support seat 11; the indicator light 16 is arranged on the support seat 11 and maintains a signal connection with the level detection sensor 15. The adjustment pin 17 is connected to the support leg 12 by threaded rotation. The cross section of the adjustment pin is a T-shaped structure. A threaded hole is provided in the support leg, so that the height of the corresponding support leg can be adjusted by rotating the adjustment pin. The indicator light 16 includes a green light 18 and a red light 19. When the green light 18 indicates that the support seat 11 is horizontal when it is on; when the red light 19 indicates that the support seat 11 needs to be adjusted horizontally when it is on. The purpose of such a setting is to achieve convenient and efficient horizontal adjustment by setting the cooperation of the level detection sensor, the indicator light and the adjustment pin, ensure the stability and horizontality of the support seat as a test carrier support, and provide a strong foundation for subsequent effective test measurements.

[0024] like Figure 1 As shown: In this embodiment, the electronic scale 3 is a high-precision electronic scale 3, and is placed on the support base 11 and corresponds to the through hole 14. The sample assembly 2 includes a glass cylinder 21, an acrylic sleeve 22, a sample block 23, a sealing ring 24 and a rubber film 25. Figure 2 As shown: the glass cylinder 21 is arranged below the support seat 11; in the simulation test, the applicant uses a glass cylinder with an inner diameter of 360 mm, an outer diameter of 370 mm, and a height of 300 mm. The acrylic sleeve 22 is an open structure at both ends and is arranged in the glass cylinder 21, and the central axis of the glass cylinder 21, the acrylic sleeve 22 and the through hole 14 are kept consistent. Specifically, Figure 4 As shown: the acrylic sleeve 22 is a cylindrical structure with large ends and a small middle. In the actual test process, the inner diameter of the two ends of the acrylic sleeve is 60mm, and the outer diameter is 66mm; the inner diameter of the middle part of the acrylic sleeve is 56mm, and the outer diameter is 66mm, wherein the height of this part is set to 80mm; the total height of the acrylic sleeve is 160mm, mainly to prevent the sealing ring from sliding when vacuuming.

[0025] like Figure 1As shown: In this embodiment, one side of the acrylic sleeve 22 is also connected to the air pipe 26, and the air pipe and the acrylic sleeve are integrally formed. The air pipe 26 is connected to the vacuum pump 4 through a conduit 27, wherein the conduit is a hose structure, and the conduit and the air pipe are sealed and connected through a pipe valve joint. A mounting groove 6 is also provided on one side of the support seat 11, and the vacuum pump 4 is adapted to be installed in the mounting groove 6; a small vacuum pump can be used as the vacuum pump. The purpose of such a setting is to facilitate the placement of the vacuum pump and ensure the stability of the vacuum pump. Further, a silent cotton can be placed on the inner wall of the mounting groove. A U-shaped rubber clamp 7 is also provided at the bottom end of the support seat 11 for adapting and installing the conduit 27; the purpose of such a setting is to keep the conduit (hose) between the glass tube and the acrylic sleeve in a natural drooping state, so that it cannot contact the glass tube, and avoid test errors. The sample block 23 is set in the acrylic sleeve 22, and the sealing ring 24 is installed on the sample block 23 and is pressed and contacted with the inner wall of the acrylic sleeve 22. The rubber membrane 25 adopts a membrane structure with tiny pores, and the sealing ring 24 and the rubber membrane 25 are an integral structure, and the rubber membrane 25 is kept in close contact with the sample block 23 to complete the compression operation of the sample block 23. The rubber membrane 25 is sleeved on the inner wall of the sealing ring 24, and the two are sealed and connected as a whole through the annular rubber band 28; and the sealing ring 24, the rubber membrane 25, and the rubber band 28 are two groups symmetrically distributed up and down. The outer diameter of the sealing ring is 60mm, the inner diameter is 50mm, and the height is 10mm. The rubber membrane with tiny pores is fixed on the sealing ring to form an integral structure. The sample block is a standard rock specimen, that is, a rock specimen with a diameter of 50mm and a height of 100mm.

[0026] like Figure 1 and Figure 3As shown: In this embodiment, the acrylic sleeve 22 is connected to the electronic scale 3 through the hanging piece 5, and the electronic weighing operation is completed. Specifically, the hanging piece 5 includes a fixed sleeve 51, a fixed ring 52, a hanging rod 53 and a connecting arm 54. The fixed sleeve 51 is mounted on the upper end of the acrylic sleeve 22, and the two form an integrated structure. The fixed ring 52 is a plurality of evenly distributed rings and is installed on the outside of the fixed sleeve 51; the hanging rod 53 is a plurality of ring-shaped distributed rings, and one end is connected to the fixed ring 52 through a hook 55. Of course, the hanging rod and the fixed sleeve of this embodiment can also be connected by a pin shaft rotation connection, the main purpose of which is to facilitate disassembly and assembly and ensure sufficient hanging stability. The top ends of the plurality of hanging rods 53 are connected to form an integrated structure through a mounting seat 56, and a hook 57 is provided on the mounting seat 56; one end of the connecting arm 54 is connected to the electronic scale 3, and the other end is connected to the hook 57. In this embodiment, a hanging line or a hanging rope can also be directly used to complete the connection between the electronic scale and the acrylic sleeve. The purpose of such a setting is to facilitate the connection and installation of the acrylic sleeve and the electronic scale, to realize the weighing function and to ensure the stability of the acrylic sleeve to prevent it from shaking. The high-precision electronic scale and small vacuum pump used in this embodiment can be common products in the market in the prior art, and their working principles are common knowledge, so they are not described in detail.

[0027] During the test, the staff first placed the support base and support leg structure on the table, and quickly adjusted the support base to a horizontal level with the help of the bottom adjustment pins, level detection sensors, and indicator lights. Then, a high-precision electronic scale was placed on the support base and adjusted to a horizontal state with the bottom bolts. The next step was to turn on the high-precision electronic scale and weigh the mass m1 of the sample block (dried rock specimen).

[0028] In the next step, the staff will use a sealing ring to cover the sample block - rock specimen (dried specimen), and keep the end face of the sealing ring about 10mm away from the cross section of the sample block. Use a rubber band to fix the sealing ring and the rubber membrane with tiny pores on the rock specimen (specifically, first put the rubber band on the rubber membrane and then insert the sealing ring to form an integrated structure, and ensure that the rubber membrane is in contact with the sample block. The sample block with the sealing ring is placed in the center of the acrylic sleeve, connected to the lifting parts, and the connecting arm is connected to the high-precision electronic scale to ensure that the weighing change of the acrylic sleeve can be achieved through the high-precision electronic scale. In the next step, the fixed sample block and acrylic sleeve are placed as a whole in the glass tube, and the vacuum duct (hose) is connected and the hose between the glass tube and the acrylic sleeve is maintained. It is in a naturally drooping state and cannot touch the bottom of the glass. Then quickly add test water to the glass cylinder. The water should be added quickly and the specimen should not shake widely. When the water surface is about 10mm above the top of the acrylic sleeve, stop filling the water and clear the electronic scale. If the controlled water absorption is small, there is no need to turn on the vacuum pump 5, and let the specimen absorb water naturally in the water. If the controlled water absorption is large, it is necessary to turn on the vacuum pump for vacuum extraction to allow water to enter the sample block (rock specimen). The power should not be too large when vacuuming. The function of the vacuum pump is to speed up the water absorption rate of the rock and make the rock absorb water evenly.

[0029] During this process, the reading on the electronic scale is the amount of water absorbed by the rock (the test water enters the acrylic sleeve during the test, indicating that the sealing ring is not sealed well, the test fails, and the test piece needs to be reinstalled for testing). The water content of the rock can be calculated based on the weight of the dry test piece and the water absorption of the rock. Since the sealing ring, acrylic sleeve, rubber membrane, etc. do not absorb water, the change in the reading of the electronic scale is the change in the mass of the rock. Since the reading of the electronic scale is reset after water injection, the reading displayed on the electronic scale during the test is the amount of water absorbed by the rock specimen. The water absorption of the rock is recorded as m2, and the water absorption rate of the rock is w= (m2 / m1) × 100%. During the test, the water content of the rock can be accurately controlled by observing the reading displayed on the electronic scale. For example: Based on the mass m1 of the rock specimen and the required water content w, the mass m2 of the rock that needs to absorb water is calculated by the formula w=(m2 / m1)×100%. When the electronic scale reading reaches m2 during the test, the experiment needs to be stopped and the specimen is quickly taken out of the glass tube, thus achieving quantitative control of the rock's water content and water content. In order to make the water content in the rock more uniform, it can be wrapped with plastic wrap for a period of time.

[0030] The protection scope of the utility model is not limited to a test device for quantitatively controlling the water content of rocks. More requirements can be met by changing the size of the corresponding parts and the test process. Obviously, those skilled in the art can modify the size and structure of certain parts of the utility model without departing from the scope and spirit of the utility model. If these modifications and deformations fall within the scope of the utility model claims and their equivalent technologies, the intent of the utility model also includes these modifications and deformations.

[0031] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A test device for quantitatively controlling the water content of rocks, characterized by: The test device comprises a support structure (1), a sample assembly (2), an electronic scale (3) and a vacuum pump (4); the support structure (1) comprises a support seat (11), support legs (12) and an adjusting member (13); the support seat (11) is distributed on the left and right, and a through hole (14) is opened in the center; the support legs (12) are arranged vertically downward on the support seat (11), and the adjusting member (13) is used to complete the leveling operation of the support seat (11); the electronic scale (3) adopts a high-precision electronic scale (3), and is placed on the support seat (11) and corresponds to the through hole (14); the sample assembly (2) comprises a glass cylinder (21), an acrylic sleeve (22), a sample block (23), a sealing ring (24) and a rubber membrane (25); the glass cylinder (21) is arranged below the support seat (11), and the acrylic sleeve (22) is open at both ends. The acrylic sleeve (22) is provided with a structure and is arranged in a glass cylinder (21), and the central axis of the glass cylinder (21), the acrylic sleeve (22) and the through hole (14) are kept consistent; the acrylic sleeve (22) is connected to the electronic scale (3) through a hanging piece (5) and completes the electronic weighing operation, and an air pipe (26) is also connected to one side of the acrylic sleeve (22), and the air pipe (26) is connected to the vacuum pump (4) through a conduit (27); the sample block (23) is arranged in the acrylic sleeve (22), and the sealing ring (24) is sleeved and installed on the sample block (23) and is in tight contact with the inner wall of the acrylic sleeve (22); the rubber membrane (25) adopts a membrane structure with tiny pores, and the sealing ring (24) and the rubber membrane (25) are an integrated structure, and the rubber membrane (25) is kept in close contact with the sample block (23) to complete the pressing operation of the sample block (23).

2. A test device for quantitatively controlling the water content of rocks as claimed in claim 1, characterized in that: The adjusting member (13) comprises a level detection sensor (15), an indicator light (16) and an adjusting pin (17); the level detection sensor (15) is fixedly mounted on the bottom end of the support base (11); the indicator light (16) is arranged on the support base (11) and maintains a signal connection with the level detection sensor (15); and the adjusting pin (17) is rotatably connected to the support leg (12) via a thread.

3. A test device for quantitatively controlling the water content of rocks as claimed in claim 2, characterized in that: The indicator light (16) comprises a green light (18) and a red light (19); when the green light (18) is on, it indicates that the support base (11) is in a horizontal position; when the red light (19) is on, it indicates that the support base (11) needs to be adjusted to a horizontal position.

4. A test device for quantitatively controlling the water content of rocks as claimed in claim 3, characterized in that: The rubber membrane (25) is sleeved on the inner wall of the sealing ring (24), and the two are integrally sealed and connected via an annular rubber band (28); and the sealing ring (24), the rubber membrane (25), and the rubber band (28) are two groups symmetrically distributed up and down.

5. A test device for quantitatively controlling the water content of rocks as claimed in claim 1, characterized in that: The hanging component (5) comprises a fixing sleeve (51), a fixing ring (52), a hanging rod (53) and a connecting arm (54); the fixing sleeve (51) is sleeved and mounted on the upper end of the acrylic sleeve (22); the fixing ring (52) is a plurality of ring-shaped evenly distributed ones and is mounted on the outer side of the fixing sleeve (51); the hanging rod (53) is a plurality of ring-shaped evenly distributed ones and is mounted on the outer side of the fixing sleeve (51); one end of the hanging rod (53) is connected to the fixing ring (52) through a hook (55); the top ends of the plurality of hanging rods (53) are connected to form an integrated structure through a mounting seat (56); the mounting seat (56) is provided with a hanging hook (57); one end of the connecting arm (54) is connected to the electronic scale (3) and the other end is connected to the hanging hook (57).

6. A test device for quantitatively controlling the water content of rocks as claimed in claim 1, characterized in that: A mounting groove (6) is also provided on one side of the support seat (11), and the vacuum pump (4) is adapted to be mounted in the mounting groove (6).

7. A test device for quantitatively controlling the water content of rocks as claimed in claim 1, characterized in that: A U-shaped rubber clamp (7) is also provided at the bottom end of the support seat (11).

8. A test device for quantitatively controlling the water content of rocks as claimed in claim 1, characterized in that: The acrylic sleeve (22) is a cylindrical structure with large ends and a small middle.

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