Movable thermal shock environment box for rock mechanical test

Abstract

The invention belongs to the technical field of rock mechanics, and particularly relates to a movable thermal shock environment box for a rock mechanics test, during the test, a sample is placed in a cavity, the test box is placed on a loading machine, and the loading end of the loading machine extends into the cavity through a first through hole to load pressure on the sample; a cavity and a sample are heated through a heating mechanism arranged in the experiment box, the cavity and the sample are rapidly cooled through a rapid cooling mechanism arranged in the experiment box, so that thermal shock is achieved, the experiment box is convenient to move through a moving part arranged at the bottom of the experiment box, and meanwhile the moving part has a locking function; the experiment box can be fixed conveniently and quickly when needed; the rapid temperature change in the cavity can be realized through the heating mechanism and the rapid cooling mechanism, the thermal shock and force coupling test on the sample is realized, and meanwhile, the moving part is arranged, so that the experiment box is convenient to move.

Description

Technical Field

[0001] The invention belongs to the technical field of rock mechanics, and in particular relates to a movable thermal shock environment box for rock mechanics testing. Background Art

[0002] Rock mechanics is a branch of applied mechanics that focuses on the mechanical response (including stress, strain, failure, and time-dependent deformation) of rock masses (including intact rock) under external factors such as load, seepage, and temperature changes, as well as the stability and reinforcement principles and methods of rock masses (including intact rock). This discipline is also known as rock mass mechanics.

[0003] In the prior art, most devices used for rock mechanics experiments can only provide a single high-temperature environment for samples, have poor functionality, and have poor mobility.

[0004] Therefore, a movable thermal shock environment chamber for rock mechanics tests is proposed. Summary of the Invention

[0005] The purpose of the present invention is to provide a movable thermal shock environment box for rock mechanics testing to solve the above problems.

[0006] To achieve the above object, the present invention provides the following solutions:

[0007] A movable thermal shock environment chamber for rock mechanics testing, comprising: an experimental chamber, wherein a cavity for placing a sample is defined within the experimental chamber, and a first through hole is defined on the experimental chamber, the first through hole vertically penetrating the cavity, and the first through hole is coaxially arranged with the cavity;

[0008] The experimental box is provided with a heating mechanism and a rapid cooling mechanism, wherein the heating mechanism is used to heat the cavity, and the rapid cooling mechanism is used to cool the cavity;

[0009] A moving part is provided below the experimental box, and the moving part has a locking function.

[0010] In the movable thermal shock environment chamber for rock mechanics testing of the present invention, the test chamber comprises two boxes, the two boxes are hingedly arranged, one side of the box is provided with an opening, the hinge of the two boxes is located on one side of the opening, and a hook assembly is provided between the two boxes, the hook assembly is away from the hinge of the two boxes;

[0011] A vertical partition is fixedly connected to the box body, with a distance between the partition and the opening. The openings of the two boxes and the two partitions enclose the cavity, and the first through hole passes through the top and bottom ends of the opening.

[0012] In the movable thermal shock environment box for rock mechanics testing of the present invention, the heating mechanism includes multiple heaters, which are inserted into the partition. The multiple heaters are arranged at equal intervals along the height direction of the partition, and the heaters are electrically connected to a control unit.

[0013] In the movable thermal shock environment box for rock mechanics tests of the present invention, the rapid cooling mechanism includes an air inlet pipe fixedly connected to the side wall of the box body, one end of the air inlet pipe penetrates into the box body and is connected to multiple exhaust pipes, the exhaust pipe passes through the partition and penetrates into the box body, and the other end of the air inlet pipe is connected to a liquid nitrogen tank.

[0014] In the movable thermal shock environment box for rock mechanics testing of the present invention, the movable portion includes a plurality of rollers, which are respectively mounted on the bottoms of the two boxes and arranged in an array.

[0015] The roller is a universal wheel with a self-locking function.

[0016] In the movable thermal shock environment box for rock mechanics testing of the present invention, the hook assembly includes a second through hole opened at the top and bottom of one of the box bodies, the second through hole is coaxially fixed with a slip ring at one end close to the inner cavity of the box body, a sliding rod is slidably connected at the inner edge of the slip ring, the bottom end of the sliding rod penetrates into the inner cavity of the box body and is fixed with a connecting rod, one side of the connecting rod is fixed with a second hook, the second hook is hung with the first hook, the first hook is fixed to the inner wall of the other box body, the top end of the sliding rod is fixed with a limit plate, the limit plate is slidably connected to the second through hole, a spring is sleeved on the outer side of the sliding rod, the spring is located between the slip ring and the limit plate, the top end of the sliding rod passes through the limit plate and is fixed with a button, and the bottom end of the button is slidably connected to the second through hole.

[0017] In the movable thermal shock environment box for rock mechanics testing of the present invention, an arcuate groove is circumferentially provided at the opening of one of the box bodies, and an arcuate protrusion is circumferentially fixed to the opening of the other box body, and the arcuate groove is adapted to the arcuate protrusion.

[0018] In the movable thermal shock environment box for rock mechanics testing of the present invention, the box body is filled with a thermal insulation layer, and the thermal insulation layer is located on a side of the partition away from the opening.

[0019] In the movable thermal shock environment box for rock mechanics testing of the present invention, a plurality of temperature sensors are embedded on one side of the partition located in the cavity, and the plurality of temperature sensors are all electrically connected to the control unit.

[0020] In the movable thermal shock environment chamber for rock mechanics testing of the present invention, the control unit includes a control panel fixedly mounted on one of the outer side walls of the chamber, and the control panel is electrically connected to the temperature sensor and the heater.

[0021] Compared with the prior art, the present invention has the following advantages and technical effects:

[0022] During the test, the sample is placed in the cavity and the experimental box is placed on the loader. The loading end of the loader extends into the cavity through the first through hole to apply pressure to the sample. The cavity and the sample are heated by the heating mechanism arranged in the experimental box, and the cavity and the sample are quickly cooled by the rapid cooling mechanism arranged in the experimental box, thereby realizing real-time thermal shock and force coupling tests. The movable part arranged at the bottom of the experimental box makes the experimental box easy to move. At the same time, the movable part has a locking function, so that the experimental box can be fixed when needed, which is convenient and quick.

[0023] The present invention can realize rapid temperature change in the cavity through a heating mechanism and a rapid cooling mechanism, and realizes thermal shock and force coupling tests on the sample in combination with a mechanical testing machine. At the same time, a moving part is provided, so that the experimental box is easy to move. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. Those skilled in the art can also derive other drawings based on these drawings without inventive work.

[0025] Figure 1 It is the front view of the present invention;

[0026] Figure 2 It is a structural diagram;

[0027] Figure 3 for Figure 2 A partial enlarged view of point A in the middle;

[0028] Figure 4 This is a state diagram of the box body in use in the present invention;

[0029] Figure 5 for Figure 4 A partial enlarged view of point B in the middle;

[0030] Among them, 1. box body; 2. roller; 4. control panel; 5. first through hole; 6. air inlet pipe; 7. button; 9. exhaust pipe; 10. partition; 11. heater; 12. temperature sensor; 13. thermal insulation layer; 14. first hook; 15. second hook; 16. connecting rod; 17. slide rod; 18. spring; 19. slip ring; 20. limit plate; 21. loader; 22. liquid nitrogen tank; 23. support rod; 24. support foot; 25. load plate; 26. slide plate; 27. ball bearing; 28. threaded rod; 29. ​​upper loading block; 30. lifting block; 31. specimen; 32. cavity. DETAILED DESCRIPTION

[0031] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0032] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0033] Reference Figures 1 to 5 The present invention discloses a movable thermal shock environment box for rock mechanics testing, comprising: an experimental box, wherein a cavity for placing a sample 31 is provided in the experimental box, and a first through hole 5 is provided on the experimental box, the first through hole 5 vertically passing through the cavity, and the first through hole 5 is coaxially arranged with the cavity;

[0034] The experimental box is provided with a heating mechanism and a rapid cooling mechanism. The heating mechanism is used to heat the cavity, and the rapid cooling mechanism is used to cool the cavity.

[0035] A moving part is provided at the bottom of the experimental box, and the moving part has a locking function.

[0036] During the test, the sample 31 is placed in the cavity, and the experimental box is placed on the loader 21. The loading end of the loader 21 extends into the cavity through the first through hole 5 to pressure-load the sample 31. The cavity and the sample 31 are heated by the heating mechanism provided in the experimental box, and the cavity and the sample 31 are quickly cooled by the rapid cooling mechanism provided in the experimental box, thereby achieving thermal shock. The movable part provided at the bottom of the experimental box makes it easy to move the experimental box, and the movable part has a locking function, so that the experimental box can be fixed when needed, which is convenient and quick.

[0037] In one feasible solution, the experimental box includes two boxes 1, the two boxes 1 are hingedly arranged, one side of the box 1 is provided with an opening, the hinge of the two boxes 1 is located on one side of the opening, and a hook assembly is provided between the two boxes 1, and the hook assembly is away from the hinge of the two boxes 1;

[0038] A vertical partition 10 is fixedly connected to the box body 1, with a distance between the partition 10 and the opening. The openings of the two boxes 1 and the two partitions 10 enclose a cavity, and the first through hole 5 passes through the top and bottom ends of the opening.

[0039] One side of the two boxes 1 is hinged by a hinge, and the other side is connected by a hook assembly. When in use, the two boxes 1 are opened at the opening, and the lifting block 30 is placed at the first through hole 5 at the bottom. The sample 31 is located above the lifting block 30, and the upper loading block 29 is placed at the first through hole 5 at the top. The upper loading block 29 and the lifting block 30 are both connected to the loading end of the loader 21.

[0040] In an implementable solution, the heating mechanism includes a plurality of heaters 11 , which are disposed in the partition 10 , and are arranged at equal intervals along the height direction of the partition 10 , and the heaters 11 are electrically connected to a control unit.

[0041] Specifically, the heater 11 is a heating wire.

[0042] In one feasible solution, the rapid cooling mechanism includes an air inlet pipe 6 fixedly connected to the side wall of the box body 1, one end of the air inlet pipe 6 penetrates into the box body 1 and is connected to multiple exhaust pipes 9, the exhaust pipes 9 pass through the partition 10 and penetrate into the box body 1, and the other end of the air inlet pipe 6 is connected to a liquid nitrogen tank 22.

[0043] The liquid nitrogen tank 22 contains liquid nitrogen, and the liquid nitrogen is introduced into the cavity, thereby rapidly cooling the cavity and the sample 31 therein.

[0044] In an implementable solution, the moving part includes a plurality of rollers 2, and the plurality of rollers 2 are respectively installed at the bottom of the two boxes 1, and the plurality of rollers 2 are distributed in an array;

[0045] The roller 2 is a universal wheel with a self-locking function.

[0046] In an implementable scheme, the hook assembly includes a second through hole opened at the top and bottom of one of the box bodies 1, and a slip ring 19 is coaxially fixed to one end of the second through hole close to the inner cavity of the box body 1, and a sliding rod 17 is slidably connected to the inner edge of the slip ring 19. The bottom end of the sliding rod 17 penetrates into the inner cavity of the box body 1 and is fixed to the end thereof. A second hook 15 is fixed to one side of the connecting rod 16, and the second hook 15 is hung with the first hook 14. The first hook 14 is fixed to the inner wall of the other box body 1, and the top end of the sliding rod 17 is fixed to the limit plate 20, and the limit plate 20 is slidably connected in the second through hole. A spring 18 is sleeved on the outer side of the sliding rod 17, and the spring 18 is located between the slip ring 19 and the limit plate 20. The top end of the sliding rod 17 passes through the limit plate 20 and is fixed to the button 7, and the bottom end of the button 7 is slidably connected in the second through hole.

[0047] In an implementable solution, an arc-shaped groove is circumferentially provided at the opening of one of the boxes 1 , and an arc-shaped protrusion is circumferentially fixed to the opening of the other box 1 , and the arc-shaped groove is adapted to the arc-shaped protrusion.

[0048] The arrangement of the arc-shaped groove and the arc-shaped protrusion can effectively increase the sealing performance of the connection of the box body 1;

[0049] In an implementable solution, the box body 1 is filled with a heat insulation layer 13 , and the heat insulation layer 13 is located on a side of the partition 10 away from the opening.

[0050] In an implementable solution, a plurality of temperature sensors 12 are embedded on one side of the partition 10 located in the cavity, and the plurality of temperature sensors 12 are all electrically connected to the control unit.

[0051] In an implementable solution, the control unit includes a control panel 4 , which is fixedly mounted on an outer side wall of one of the boxes 1 . The control panel 4 is electrically connected to the temperature sensor 12 and the heater 11 .

[0052] Experimental methods:

[0053] First, place the experimental box on the supporting plate 25 of the bracket, press the two buttons 7, and the first hook 14 and the second hook 15 will be disengaged. At this time, the openings of the two boxes 1 can be opened, so that the top of the lifting block 30 extends into the first through hole 5 at the bottom, and the sample 31 is placed on the top of the lifting block 30. The bottom end of the upper loading block 29 extends into the first through hole 5 at the top, and the two boxes 1 are closed. The first hook 14 and the second hook 15 are hung, and then the roller 2 is locked. The sample is loaded with pressure by the loader 21 to realize uniaxial compression test, Brazilian splitting test, and fracture test of rock under high temperature; liquid nitrogen is introduced into the cavity under high temperature environment to quickly cool the sample 31 while pressurizing the sample.

[0054] Among them, the bracket includes a supporting plate 25, and the four corners of the bottom surface of the supporting plate 25 are fixed with vertically arranged support rods 23. A threaded hole is coaxially opened in the support rod 23, and a threaded rod 28 is threadedly connected in the threaded hole. The bottom end of the threaded rod 28 passes through the supporting rod 23 and is coaxially fixed with a sliding plate 26. A plurality of balls 27 are embedded on the bottom surface of the sliding plate 26. The plurality of balls 27 are arranged at equal intervals along the circumference of the sliding plate 26. The balls 27 are slidingly connected to the sliding plate 26. The bottom end of the ball 27 passes through the sliding plate 26 and is rollingly connected in the annular groove. The annular groove is opened on the bottom wall of the cavity 32, and the cavity 32 is coaxially opened in the support foot 24.

[0055] The height of the supporting plate 25 can be adjusted by rotating the threaded rod 28 .

[0056] In the description of the present invention, it should be understood that the terms "longitudinal", "transverse", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention, rather than indicating or implying 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.

[0057] The embodiments described above are merely descriptions of preferred embodiments of the present invention and are not intended to limit the scope of the present invention. Without departing from the spirit of the present invention, various modifications and improvements made to the technical solutions of the present invention by persons skilled in the art should fall within the scope of protection defined by the claims of the present invention.

Claims

1. A movable thermal shock environment chamber for rock mechanics testing, characterized in that: The invention comprises: an experimental box, wherein a cavity for placing a sample (31) is provided in the experimental box, a first through hole (5) is provided on the experimental box, the first through hole (5) vertically passes through the cavity, and the first through hole (5) is coaxially arranged with the cavity; The experimental box is provided with a heating mechanism and a rapid cooling mechanism, wherein the heating mechanism is used to heat the cavity, and the rapid cooling mechanism is used to cool the cavity; A moving part is provided below the experimental box, and the moving part has a locking function.

2. The portable thermal shock environment chamber for rock mechanics testing according to claim 1, characterized in that: The experimental box comprises two boxes (1), the two boxes (1) are hingedly arranged, one side of the box (1) is provided with an opening, the hinge of the two boxes (1) is located on one side of the opening, and a hook assembly is provided between the two boxes (1), and the hook assembly is away from the hinge of the two boxes (1); A vertically arranged partition (10) is fixedly connected to the box body (1), and a distance is left between the partition (10) and the opening. The openings of the two boxes (1) and the two partitions (10) enclose the cavity, and the first through hole (5) passes through the top and bottom ends of the opening.

3. The movable thermal shock environment chamber for rock mechanics testing according to claim 2, characterized in that: The heating mechanism includes a plurality of heaters (11), the heaters (11) are arranged in the partition (10), the plurality of heaters (11) are arranged at equal intervals along the height direction of the partition (10), and the heaters (11) are electrically connected to a control unit.

4. The movable thermal shock environment chamber for rock mechanics testing according to claim 2, characterized in that: The rapid cooling mechanism includes an air inlet pipe (6) fixedly connected to the side wall of the box (1), one end of the air inlet pipe (6) penetrates into the box (1) and is connected to a plurality of exhaust pipes (9), the exhaust pipes (9) pass through the partition (10) and penetrate into the box (1), and the other end of the air inlet pipe (6) is connected to a liquid nitrogen tank (22).

5. The movable thermal shock environment chamber for rock mechanics testing according to claim 2, characterized in that: The moving part comprises a plurality of rollers (2), the plurality of rollers (2) being respectively mounted on the bottoms of the two boxes (1), and the plurality of rollers (2) being distributed in an array; The roller (2) is a universal wheel with a self-locking function.

6. The movable thermal shock environment chamber for rock mechanics testing according to claim 2, characterized in that: The hook assembly includes a second through hole opened at the top and bottom of one of the boxes (1); a slip ring (19) is coaxially fixed to one end of the second through hole close to the inner cavity of the box (1); a sliding rod (17) is slidably connected to the inner edge of the slip ring (19); the bottom end of the sliding rod (17) is inserted into the inner cavity of the box (1) and is fixed to a connecting rod (16); a second hook (15) is fixed to one side of the connecting rod (16); the second hook (15) is hung with the first hook (14); the second hook (15) is connected to the first hook (14); the second hook (15) is connected to the second hook (15); the first hook (14) is connected to the second hook (15). A hook (14) is fixed on the inner wall of the other box (1), the top end of the slide rod (17) is fixed to the limit plate (20), the limit plate (20) is slidably connected in the second through hole, a spring (18) is sleeved on the outer side of the slide rod (17), the spring (18) is located between the slip ring (19) and the limit plate (20), the top end of the slide rod (17) passes through the limit plate (20) and is fixed to a button (7), and the bottom end of the button (7) is slidably connected in the second through hole.

7. The movable thermal shock environment chamber for rock mechanics testing according to claim 2, characterized in that: An arc-shaped groove is circumferentially provided at the opening of one of the boxes (1), and an arc-shaped protrusion is fixedly connected circumferentially to the opening of the other box (1), and the arc-shaped groove is adapted to the arc-shaped protrusion.

8. The movable thermal shock environment chamber for rock mechanics testing according to claim 2, characterized in that: The box body (1) is filled with a heat-insulating layer (13), and the heat-insulating layer (13) is located on a side of the partition (10) away from the opening.

9. The movable thermal shock environment chamber for rock mechanics testing according to claim 3, characterized in that: A plurality of temperature sensors (12) are embedded on one side of the partition (10) located in the cavity, and the plurality of temperature sensors (12) are all electrically connected to the control unit.

10. The movable thermal shock environment chamber for rock mechanics testing according to claim 9, characterized in that: The control unit comprises a control panel (4), which is fixedly mounted on the outer side wall of one of the boxes (1), and is electrically connected to the temperature sensor (12) and the heater (11).

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