Adaptive expansion rock sample radius confined expansion rate test device
By designing an adaptive radius sample box, the problem of strict test diameter requirements in the side-limit expansion rate test is solved, the test efficiency and sample usage are improved, the cost is reduced, and the problem of difficult to remove the sample after the test is completed is solved.
Patent Information
- Application Number
- CN202420575097.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-03-21
- Publication Date
- 2025-04-08
- Estimated Expiration
- 2034-03-21
AI Technical Summary
In the side-limit expansion rate test, the diameter of the expanded rock sample must be less than the diameter of the metal sleeve 0.0mm-0.1mm, which makes the sample production cost high and the sample difficult to take out after the test is completed.
A side-limited expansion rate test device for the radius of the adaptive expanded rock sample is designed, including an adaptive radius sample box, which consists of an arc plate and a radius adjustment device, which can adjust its own radius according to the sample diameter and adapt to samples of different diameters.
The device solves the problem of strict specimen diameter requirements, improves sample usage and test efficiency, reduces test costs, and can easily remove the specimen after the test is completed.
Smart Images
Figure CN222733492U_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the technical field of rock property testing equipment, and in particular to a lateral limit expansion rate testing device for adaptive expansion rock sample radius. Background Art
[0002] Swelling rock is a general term for a type of rock that expands, softens, or even collapses due to various physical and chemical reactions when it encounters water. It is a special soft rock. Swelling rock is widely distributed in more than 20 provinces and cities in my country. The wide distribution of swelling rock and its special properties after encountering water make it a key influencing factor in many engineering disasters at home and abroad.
[0003] The expansion rate refers to the ratio of the volume increment of a certain volume of swelling rock mass to the initial volume when it interacts with water under certain conditions. It is divided into free expansion rate and confined expansion rate. Since the free expansion rate does not take into account conditions such as load or confinement, it has little practical significance from an engineering perspective, but it can reflect the general expansion of rock and soil to a certain extent. Therefore, in order to simulate the actual expansion deformation caused by the rock and soil body under a certain load, the confined expansion rate index is often used. This index shows the close correlation between expansion and load, and therefore has important practical engineering significance. It is an expansion index that is often measured and used in engineering.
[0004] However, in the lateral expansion rate test, the diameter of the sample should be 0.0mm-0.1mm smaller than the diameter of the metal sleeve, which places high demands on the sample production level. The expansive rock sample must be prepared under dry conditions, which is very expensive to produce. After the test, the sample is difficult to remove from the metal sleeve due to its expansion. Utility Model Content
[0005] In order to improve the above problems, the utility model provides a device which can change its inner diameter according to the diameter of the swelling rock sample, thereby improving the sample utilization rate, test efficiency and reducing the test cost.
[0006] The present application provides an adaptive expansion rock sample radius confined expansion rate test device that adopts the following technical solution:
[0007] A device for testing the lateral expansion rate of an adaptive swelling rock sample radius comprises a base; a test container fixedly arranged on the base and connected to a water source; an adaptive radius sample box in a cylindrical shape, arranged in the test container, and used to accommodate the swelling rock sample; a water inlet hole is provided at the bottom of the adaptive radius sample box, and the radius of the adaptive radius sample box can be adjusted; a bracket fixedly arranged on the base; a micrometer installed on the bracket and used to measure the expansion amount of the top of the swelling rock sample.
[0008] Furthermore, the adaptive radius sample box includes at least three arc plates, and also includes a radius adjustment device for driving the multiple arc plates to move closer to or farther from each other. The arc plates are arranged to fit the swelling rock sample, which helps to avoid radial expansion of the swelling rock sample; the radius adjustment device is arranged to adapt to the diameter of different swelling rock samples, and facilitates the adjustment of the device radius.
[0009] Furthermore, the radius adjustment device includes telescopic rods arranged along the radial direction of the arc plate, and the ends of the plurality of telescopic rods are connected to one point through fixing nuts and fixing bolts, and the fixing bolts are located on the axis of the adaptive radius sample box. The arrangement of the telescopic rods helps to fix the arc plate, and more importantly, helps to adjust the radius of the telescopic adjustment device.
[0010] Furthermore, each of the arc-shaped plates is provided with two telescopic rods, which are respectively located at the upper and lower ends of the arc-shaped plate. The provision of telescopic rods at both ends helps to make the arc-shaped plate more stable and less prone to shaking.
[0011] Furthermore, the telescopic rod comprises an inner rod and an outer rod which are slidably sleeved, and a locking piece for locking the inner rod is provided on the outer rod.
[0012] Furthermore, the locking member includes a positioning bolt that passes through the inner rod, and the outer rod is provided with a strip-shaped hole along its length direction for the positioning bolt to slide, and the positioning bolt is threadedly connected with a positioning nut. After the radius is adjusted by sliding the inner rod and the outer rod, the positioning bolt and the positioning nut are arranged to fix the inner rod and the outer rod.
[0013] Furthermore, the outer rod is provided with scale lines for marking the length of the telescopic rod. The setting of the scale lines makes the adjustment of the radius more convenient and intuitive.
[0014] Furthermore, a first permeable stone is arranged on the telescopic rod at the lower end of the arc plate, a first filter paper is arranged above the first permeable stone, an expanded rock sample is arranged above the first filter paper, a second filter paper is arranged above the expanded rock sample, a second permeable stone is arranged above the second filter paper, and a metal load block is arranged above the second permeable stone.
[0015] Furthermore, the probe of the micrometer is in contact with the metal load block.
[0016] Furthermore, the height of the test container is higher than the height of the adaptive radius sample box, which helps the test container to contain water during the test process.
[0017] In summary, the present application includes at least one of the following beneficial technical effects:
[0018] 1. Aiming at the problem that the expansion rate of the expansion rock side limit requires the expansion rock sample diameter to be 0.0mm-0.1mm smaller than the metal sleeve diameter, this patent proposes an adaptive radius sample box device, which can be applied to expansion rock samples of different diameters, solving the problem that the sample diameter must be 0-0.1mm smaller than the metal sleeve diameter, saving expansion rock samples and test costs;
[0019] 2. In view of the problem that the production cost of expansion rock samples is high but the utilization rate is low, the present invention provides a new type of lateral expansion rate test device with adaptive expansion rock sample radius, which is suitable for the lateral expansion rate test of samples with a diameter of 50mm-65mm as required by the specifications. For samples with different diameters, there is no need to replace the metal ring for limiting lateral deformation. Instead, the diameter of the adaptive radius sample box is adjusted to adapt to the size of the sample, thereby improving the utilization rate of the test, saving the cost of expansion rock samples and the production of samples, and the device is simple to operate and improves the test efficiency.
[0020] 3. In response to the problem that the expanded rock sample is difficult to remove from the metal sleeve after the expansion test, this patent proposes an adaptive radius sample box device, which solves the problem that the sample is stuck in the metal sleeve and difficult to remove after the test, thereby improving the test efficiency. BRIEF DESCRIPTION OF THE DRAWINGS
[0021] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the utility model;
[0022] Figure 2 It is a structural schematic diagram of the adaptive radius sample box of the utility model;
[0023] Figure 3 It is a schematic diagram of the local structure of the adaptive radius sample box of the utility model;
[0024] Figure 4 It is a schematic diagram of the telescopic rod of the utility model.
[0025] Figure numerals: 1. base; 2. water inlet valve; 3. water inlet pipe; 4. test container; 5. adaptive radius sample box; 6. expansion rock sample; 7. bracket; 8. micrometer; 9. water inlet hole; 10. arc plate; 11. radius adjustment device; 12. telescopic rod; 13. fixing nut; 14. fixing bolt; 15. inner rod; 16. outer rod; 17. strip hole; 18. scale line; 19. positioning bolt; 20. positioning nut; 21. connecting screw hole; 22. connecting thread; 23. first permeable stone; 24. first filter paper; 25. second filter paper; 26. second permeable stone; 27. metal load block. DETAILED DESCRIPTION
[0026] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.
[0027] In the description of the present invention, it should be understood that descriptions involving orientation, such as up, down, left, right, front, back, etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.
[0028] In the description of the utility model, if there is a description of first and second, it is only for the purpose of distinguishing the technical features, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.
[0029] The utility model is further described in detail below in conjunction with the accompanying drawings.
[0030] like Figure 1 , Figure 2 As shown, a lateral limit expansion rate test device for the radius of an adaptive swelling rock sample comprises a base 1, on which is provided a water inlet pipe 3, on which is installed a water inlet valve 2; a test container 4 connected to the water inlet pipe 3 is fixedly provided on the base 1; a cylindrical adaptive radius sample box 5 is provided in the test container 4 for accommodating the swelling rock sample 6; a water inlet hole 9 is provided at the bottom of the adaptive radius sample box 5, and the radius of the adaptive radius sample box 5 can be adjusted; a bracket 7 is also fixedly provided on the base 1, on which is installed a micrometer 8 for measuring the expansion amount of the top of the swelling rock sample 6.
[0031] like Figure 1 , Figure 2 , Figure 3 As shown, the adaptive radius sample box 5 includes four arc plates 10 and a radius adjustment device 11 for driving the four arc plates 10 to move closer to or farther from each other. The arc plates 10 are provided to fit the swelling rock sample 6, which helps to prevent the swelling rock sample 6 from radial expansion; the radius adjustment device 11 is provided to adapt to the diameters of different swelling rock samples 6, and facilitates the adjustment of the device radius.
[0032] like Figure 1 , Figure 2 , Figure 3 , Figure 4As shown, the radius adjustment device 11 includes telescopic rods 12 arranged along the radial direction of the arc plate 10, and the ends of the four telescopic rods 12 are connected to one point through fixing nuts 13 and fixing bolts 14, and the fixing bolts 14 are located on the axis of the adaptive radius sample box 5. The arrangement of the telescopic rods 12 helps to fix the arc plate 10, and more importantly, helps to adjust the radius of the telescopic adjustment device.
[0033] like Figure 2 , Figure 3 As shown, each arc plate 10 is provided with a connecting screw hole 21 for connecting a telescopic rod 12; each arc plate 10 is provided with two telescopic rods 12, and the two telescopic rods 12 are respectively located at the upper and lower ends of the arc plate 10. The provision of telescopic rods 12 at both ends helps to make the arc plate 10 more stable and less likely to shake.
[0034] like Figure 2 , Figure 4 As shown, the telescopic rod 12 includes an inner rod 15 and an outer rod 16 which are slidably sleeved, and a locking piece for locking the inner rod 15 is provided on the outer rod 16 .
[0035] like Figure 2 , Figure 3 , Figure 4 As shown, the locking member includes a positioning bolt 19 that passes through the inner rod 15, and the outer rod 16 is provided with a strip hole 17 along its length direction for the positioning bolt 19 to slide, and the positioning bolt 19 is threadedly connected with a positioning nut 20. After the radius is adjusted by sliding the inner rod 15 and the outer rod 16, the positioning bolt 19 and the positioning nut 20 are arranged to fix the inner rod 15 and the outer rod 16. The end of the outer rod 16 away from the inner rod 15 is provided with a connecting thread 22, which is fixed to the connecting screw hole 21 on the arc plate 10 through a connecting nut.
[0036] like Figure 2 , Figure 4 As shown, the outer rod 16 is provided with scale lines 18 for marking the length of the telescopic rod 12. The setting of the scale lines 18 makes it more convenient and intuitive to adjust the radius.
[0037] like Figure 1 , Figure 2 , Figure 3 As shown, a first permeable stone 23 is arranged on the telescopic rod 12 at the lower end of the arc plate 10, a first filter paper 24 is arranged above the first permeable stone 23, an expansion rock sample 6 is arranged above the first filter paper 24, a second filter paper 25 is arranged above the expansion rock sample 6, a second permeable stone 26 is arranged above the second filter paper 25, and a metal load block 27 is arranged above the second permeable stone 26. The probe of the micrometer 8 contacts the metal load block 27.
[0038] like Figure 1As shown, the height of the test container 4 is higher than that of the adaptive radius sample box 5 , which helps the test container 4 to contain water during the test.
[0039] When the utility model installs the swelling rock sample, after the swelling rock sample 6 is made and its diameter 2R and height L are measured, the radius adjustment device 11 and the curved plate 10 are first connected through the connecting screw hole 21 at the lower part of the curved plate 10 and the connecting thread 22 on the radius adjustment device 11, and the positioning bolt 20 on the radius adjustment device 11 is adjusted to the corresponding scale line 18, so that the inner diameter of the adaptive radius sample box 5 matches the diameter of the swelling rock sample 6. Then, the first permeable stone 23, the first filter paper 24, the swelling rock sample 6, the second filter paper 25, the second permeable stone 26 and the metal load block 27 are placed in sequence from bottom to top on the radius adjustment device 11 in the adaptive radius sample box 5 (so that the radius adjustment device 11 not only plays the role of adjusting the radius but also plays the role of placing items such as permeable stones and samples), wherein the metal load block 27 can generate a continuous pressure of 5kpa on the sample through its own mass (this part is specified in the standard "Engineering Rock Test Method Standard" and will not affect the measurement of sample expansion). Then, the radius adjustment device 11 and the arc plate 10 are connected and fixed through the connecting screw hole 21 on the upper part of the arc plate 10 and the connecting thread 22 on the radius adjustment device 11, and the installation of the expansion rock sample 6 is completed.
[0040] When the utility model conducts the side limit expansion rate test, the entire adaptive radius sample box 5 is placed in the test container 4, such as Figure 1 As shown. Then, the micrometer 8 is set on the metal load block 27 through the bracket 7, and the value of the micrometer 8 is adjusted to zero and the expansion of the swelling rock sample is recorded. Finally, the water inlet valve 2 is opened, and deionized water flows into the test container 4 through the water inlet pipe 3. At this moment, the value on the micrometer 8 is immediately recorded. Thereafter, the value on the micrometer 8 is read every 10 minutes, and the test time and expansion amount are recorded until the value does not change for 3 consecutive times and the test time is not less than 48 hours, which means that the test is over. At this time, the value △L recorded on the micrometer 8 is the final expansion amount, and the calculation formula of the lateral expansion rate of the sample is: △L / L*100%. Finally, a curve of the expansion rate of the swelling rock sample with the water absorption time is drawn. After the lateral expansion rate test is completed, it is only necessary to adjust the positioning bolt 20 on the radius adjustment device 11 so that the scale line 18 where the positioning bolt 20 is located is greater than the radius of the swelling rock sample 6 at this time, so that the swelling rock sample 6 can be easily taken out.
[0041] The utility model solves the problems existing in the current confined expansion rate test, and proposes a confined expansion rate test device with an adaptive expansion rock sample radius. The device solves the requirement that the sample diameter needs to be 0.0mm-0.1mm smaller than the confined device diameter, and an adaptive radius sample box can be used for the test of samples of various diameters, and also solves the problem that the sample is difficult to take out after the test. The device is easy to use, improves the test efficiency, and saves the expansion rock sample and the cost of making the sample.
[0042] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.
Claims
1. A device for testing the lateral expansion rate of an adaptive swelling rock sample radius, characterized in that: include: Base; A test container, fixedly arranged on the base and connected to a water source; The adaptive radius sample box is cylindrical and is arranged in the test container to accommodate the swelling rock sample; a water inlet hole is provided at the bottom of the adaptive radius sample box, and the radius of the adaptive radius sample box can be adjusted; A bracket, fixedly arranged on the base; A micrometer is installed on the bracket and is used to measure the expansion amount of the top of the swelling rock sample.
2. The device for testing the lateral expansion rate of an adaptive swelling rock sample radius according to claim 1, characterized in that: The self-adaptive radius sample box comprises at least three arc-shaped plates and also comprises a radius adjusting device for driving the plurality of arc-shaped plates to approach or move away from each other.
3. The device for testing the lateral expansion rate of an adaptive swelling rock sample radius according to claim 2, characterized in that: The radius adjustment device comprises telescopic rods arranged radially along the arc plate, the ends of the plurality of telescopic rods are connected at one point through fixing nuts and fixing bolts, and the fixing bolts are located on the axis of the adaptive radius sample box.
4. The device for testing the lateral expansion rate of an adaptive swelling rock sample radius according to claim 3, characterized in that: Two telescopic rods are provided on each of the arc-shaped plates, and the two telescopic rods are respectively located at the upper and lower ends of the arc-shaped plate.
5. The device for testing the lateral expansion rate of an adaptive swelling rock sample radius according to claim 4, characterized in that: The telescopic rod comprises an inner rod and an outer rod which are slidably sleeved, and a locking piece for locking the inner rod is arranged on the outer rod.
6. The device for testing the lateral expansion rate of an adaptive swelling rock sample radius according to claim 5, characterized in that: The locking member comprises a positioning bolt penetrating the inner rod, and the outer rod is provided with a strip hole for the positioning bolt to slide along its length direction, and the positioning bolt is threadedly connected with a positioning nut.
7. The device for testing the lateral expansion rate of an adaptive swelling rock sample radius according to claim 6, characterized in that: The outer rod is provided with scale lines for marking the length of the telescopic rod.
8. The device for testing the lateral expansion rate of an adaptive swelling rock sample radius according to claim 4, characterized in that: A first permeable stone is arranged on the telescopic rod at the lower end of the arc plate, a first filter paper is arranged above the first permeable stone, an expanded rock sample is arranged above the first filter paper, a second filter paper is arranged above the expanded rock sample, a second permeable stone is arranged above the second filter paper, and a metal load block is arranged above the second permeable stone.
9. The device for testing the lateral expansion rate of an adaptive swelling rock sample radius according to claim 8, characterized in that: The probe of the micrometer contacts the metal load block.
10. The device for testing the lateral expansion rate of an adaptive swelling rock sample radius according to claim 1, characterized in that: The height of the test container is higher than the height of the adaptive radius sample box.