Constant-temperature compression creep test device

Abstract

The invention relates to the technical field of coal mine application, and discloses a constant-temperature compression creep test device which comprises a base, a top plate is fixedly connected to the surface of the base, a plurality of first fixed pulleys are arranged on the surface of the top plate, and a coordination mechanism is arranged on the surface of the top plate perpendicular to the gravity center direction of the ground and matched with the first fixed pulleys. The equidirectional pressure orientation mechanism is provided for a creep test material, the equidirectional pressure orientation mechanism is arranged in the base, and through the arrangement of the coordination mechanism, the observation mechanism and the pressurization mechanism, three groups of same test samples can be rapidly tested at different pressures at the same time, various conditions of an initial setting loaded creep test of the high-water filling material are met, the test can be carried out in multiple lines, and the test efficiency is improved. Meanwhile, due to the arrangement of the pulley block, the gravity can be amplified by one time, two times and four times when the balance weight is added, and the problem that a jack and a hydraulic servo in a large device are prone to pressure relief and cannot provide long-term stability is solved while carrying is convenient.

Description

Technical Field

[0001] The present invention relates to the field of coal mine application technology, and more particularly to a constant temperature compression creep testing device. Background Art

[0002] As coal mining gradually extends to deeper areas, the surrounding rock mechanical environment faced by underground projects is becoming increasingly complex. Deep rock masses are exposed to high ground stress, high temperature (40-60°C) and high humidity for a long time. Their creep characteristics significantly affect the stability of the tunnel, the life of the support structure and the risk of rock burst. The time-dependent deformation (creep) of deep coal rock masses under constant load is one of the key factors leading to mine instability, tunnel shrinkage and even landslide accidents. Therefore, when filling materials inside the mine tunnel, it is necessary to conduct simulated creep testing on the support filling materials. After meeting the standards, they can be sent to the construction site for use.

[0003] Existing devices, because the creep characteristics of filling materials (such as high-water filling bodies and grouting materials) directly affect the stability of the tunnel and the safety of the goaf, are tested before use. Deformation monitoring is used, which not only reveals the long-term mechanical behavior of the filling materials but also provides a quantitative basis for the design, construction and disaster warning of underground projects.

[0004] Although the above technical solutions have solved the material testing problems to a good extent, traditional testing equipment mostly relies on fixed large-scale environmental simulation equipment. Although its core functions can meet some basic testing needs, it has significant limitations in the dynamic range and accuracy of simulated environmental parameters, resulting in systematic deviations between the simulation results and the actual working conditions. It is also difficult to apply to the initial setting load creep test of high-water-filled materials, which affects the accuracy of the simulation results to a certain extent. Summary of the Invention

[0005] The present invention discloses a constant temperature compression creep test device, which solves the technical problems in the above-mentioned background technology.

[0006] The present invention discloses a constant temperature compression creep test device, comprising:

[0007] The base is fixedly connected to a top plate on the surface of the base, and a plurality of fixed pulleys are arranged on the surface of the top plate;

[0008] The coordination mechanism is set on the top plate surface perpendicular to the center of gravity of the ground and cooperates with the fixed pulley. Under the working state, it provides the creep test material with the same direction pressure;

[0009] An orientation mechanism is arranged inside the base;

[0010] An observation mechanism is provided inside the orientation mechanism to assist in testing creep materials and provide test data for the test status of the test materials;

[0011] A boost mechanism, provided on the coordination mechanism and the observation mechanism, performs a fit test based on the creep material state;

[0012] The stabilizing mechanism is arranged on the top plate surface perpendicular to the center of gravity direction of the ground, and is used for quickly stabilizing the boosting mechanism.

[0013] As a preferred solution of the constant temperature compression creep test device of the present invention, the coordination mechanism includes a second fixed pulley arranged on the surface of the top plate, and a multi-directional rope group sliding inside the second fixed pulley.

[0014] As a preferred solution of the constant temperature compression creep test device of the present invention, the number of bases is the same as the number of strands in the multi-directional rope component, and they are rotatably connected to the fixed pulley.

[0015] As a preferred solution of the constant temperature compression creep test device of the present invention, the orientation mechanism includes a folding rod arranged inside the base, and a positioning ring arranged at the end of the folding rod.

[0016] As a preferred solution of a constant temperature compression creep test device of the present invention, the observation mechanism includes a bellows arranged on the positioning ring, a pull block 1 arranged at the end of the bellows, and a pull block 2 sliding inside the pull block 1.

[0017] As a preferred solution of a constant temperature compression creep test device of the present invention, the pull block 1 and the pull block 2 are located in the same horizontal plane, slide towards or away from each other and restrict each other, and pressure sensors and displacement sensors are installed inside the pull block 1 and the pull block 2 in contact with the bellows.

[0018] As a preferred solution of the constant temperature compression creep test device of the present invention, the ends of the multi-directional rope group are fixedly connected to the pull block.

[0019] As a preferred solution of a constant temperature compression creep testing device of the present invention, the boosting mechanism includes a rope body one arranged on a multi-directional rope group and a pull block two, the end of the rope body one is fixedly connected to a pulley group one, the pulley group one is internally slidably connected to a rope body two, the end of the rope body two is provided with a pulley group two, the pulley group two is internally slidably connected to a rope body three, the end of the rope body three is provided with a pulley group three, the pulley group three is internally slidably connected to a rope body four, the end of the rope body four is provided with a stabilizing disk, and the other ends of the rope body two, the rope body three and the rope body four are fixedly connected to an auxiliary disk.

[0020] As a preferred solution of a constant temperature compression creep test device of the present invention, the stabilizing mechanism includes a long rod arranged on the surface of the top plate, a fixed rod relatively arranged inside the long rod, and several sets of counterweights arranged on the surface of the fixed rod.

[0021] As a preferred solution of the constant temperature compression creep test device of the present invention, the fixed rod is arranged perpendicular to the center of gravity of the ground, and a limiting soft ball is arranged on the contact surface with the plurality of groups of counterweights.

[0022] The beneficial effects of the present invention are as follows: through the arrangement of the coordination mechanism, the observation mechanism, and the pressurizing mechanism, three groups of identical test samples can be simultaneously subjected to rapid tests at different pressures, meeting various conditions for the initial setting load creep test of high-water-filled materials, and enabling multi-line testing, thereby greatly improving test efficiency. Furthermore, due to the arrangement of the pulley assembly, the gravity can be amplified by one, two, and four times when counterweights are added, thereby facilitating portability and avoiding the problem of jacks and hydraulic servos in large-scale devices being prone to pressure release and unable to provide long-term stability.

[0023] Furthermore, through the setting of the observation mechanism, in the environment of the tunnel mining, the electrical components will be subject to different degrees of mutual interference. The pull block 1 and the pull block 2 restrict each other to stably pressurize the initial coagulation of the high-water filling material in the bellows, which is simple to operate and speeds up the test rate.

[0024] Furthermore, through the setting of the stabilization mechanism and the boosting mechanism, when three groups of identical test samples are quickly tested, the counterweights applied to the auxiliary plate can be quickly stabilized, and the counterweights fall vertically, reducing the shaking cycle of multiple groups of ropes when gravity contacts them, so that the test material in the bellows can obtain stable test data, and filling can be used when the material meets the standards. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 This is the overall perspective of the device of the present invention;

[0026] Figure 2 It is the second viewing angle of the device of the present invention;

[0027] Figure 3 It is a partial exploded view of the device of the present invention;

[0028] Figure 4 It is a schematic diagram of the orientation mechanism of the present invention;

[0029] Figure 5 is a schematic diagram of the observation mechanism of the present invention;

[0030] Figure 6 is an isolated schematic diagram of the observation mechanism of the present invention;

[0031] Figure 7 is a schematic diagram of the boosting mechanism and stabilizing mechanism of the present invention;

[0032] Figure 8 It is a partially enlarged schematic diagram of the boosting mechanism and the stabilizing mechanism of the present invention.

[0033] In the figure: 100, base; 101, top plate; 102, fixed pulley one; 200, coordination mechanism; 201, fixed pulley two; 202, multi-directional rope group; 300, orientation mechanism; 301, folding rod; 302, positioning ring; 400, observation mechanism; 401, bellows; 402, pull block one; 403, pull block two; 500, pressurizing mechanism; 501, rope body one; 502, pulley group one; 503, rope body two; 504, pulley group two; 505, rope body three; 506, pulley group three; 507, rope body four; 508, stabilizing disk; 509, auxiliary disk; 600, stabilizing mechanism; 601, long rod; 602, fixed rod; 603, counterweight. DETAILED DESCRIPTION

[0034] The subject matter described herein will now be discussed with reference to example embodiments. It should be understood that these embodiments are discussed solely to enable those skilled in the art to better understand and implement the subject matter described herein, and that the functions and arrangements of the elements discussed may be varied without departing from the scope of this specification. Various examples may omit, substitute, or add various processes or components as needed. Furthermore, features described in some examples may be combined in other examples.

[0035] The embodiment of the present invention discloses a constant temperature compression creep test device, such as Figures 1 to 8 As shown, the base 100 has a top plate 101 fixedly connected to the surface of the base 100, and a plurality of fixed pulleys 102 are provided on the surface of the top plate 101. The fixed pulleys 102 are designed to allow the rope structure on the device to reduce friction resistance during operation, making the test data more accurate.

[0036] The coordination mechanism 200 is arranged on the surface of the top plate 101 perpendicular to the center of gravity of the ground and cooperates with the fixed pulley 102. In the working state, the coordination mechanism 200 provides a uniform one-side pressure for the creep test material.

[0037] The orientation mechanism 300 is disposed inside the base 100 . The orientation mechanism 300 can be made of a flexible material or a rigid material, depending on the weight of the high-water filling material to be tested.

[0038] The observation mechanism 400 is arranged inside the orientation mechanism 300 to assist in testing the creep material and provide test data for the test state of the test material. The observation mechanism 400 provides a horizontal test force for the initial setting state of the high water filling material.

[0039] The pressurizing mechanism 500 is provided on the coordinating mechanism 200 and the observing mechanism 400 and performs a fit test based on the creep material state.

[0040] The stabilizing mechanism 600 is arranged on the surface of the top plate 101 perpendicular to the center of gravity of the ground, and is used to quickly stabilize the boosting mechanism 500.

[0041] The coordination mechanism 200 includes a fixed pulley 201 arranged on the surface of the top plate 101, and a multi-directional rope group 202 sliding inside the fixed pulley 201. The multi-directional rope group 202 is connected to one of the boosting mechanisms 500. In the initial state, the gravity of the boosting mechanism 500 of this group is balanced with the pressure added on the remaining groups of observation mechanisms 400.

[0042] The number of bases 100 is the same as the number of strands of the multi-directional rope set 202 , and the bases 100 are rotatably connected to the fixed pulley 102 , which further reduces the friction of the multi-directional rope set 202 .

[0043] The orientation mechanism 300 includes a folding rod 301 disposed inside the base 100 and a positioning ring 302 disposed at the end of the folding rod 301 .

[0044] The observation mechanism 400 includes a bellows 401 disposed on the positioning ring 302 , a pull block 1 402 disposed at the end of the bellows 401 , and a pull block 2 403 sliding inside the pull block 1 402 .

[0045] The pull block 1 402 and the pull block 2 403 are in the same horizontal plane, slide towards or away from each other and restrict each other, and the pull block 1 402 and the pull block 2 403 in contact with the bellows 401 are both equipped with pressure sensors and displacement sensors. The displacement sensor can monitor the axial deformation of the sample, and the pressure sensor can measure the load on the sample. Under special circumstances, a humidity controller can be installed on the outer surface of the bellows 401 to monitor and adjust the humidity in the bellows 401 cabin in real time. The pressure sensor and the displacement sensor can also be electrically connected to an analog-to-digital converter ADC to read analog signals at fixed time intervals, so that inexperienced operators can also operate through data.

[0046] The ends of the multi-directional rope group 202 are fixedly connected to the pull block 1 402.

[0047] The boosting mechanism 500 includes a rope body 1 501 arranged on the multi-directional rope group 202 and the second pull block 403, the end of the rope body 1 501 is fixedly connected to the pulley group 1 502, the pulley group 1 502 is internally connected to the rope body 2 503 in a sliding manner, the end of the rope body 2 503 is provided with a pulley group 2 504, the pulley group 2 504 is internally connected to the rope body 3 505 in a sliding manner, the end of the rope body 3 505 is provided with a pulley group 3 506, the pulley group 3 506 is internally connected to the rope body 4 507 in a sliding manner, and the end of the rope body 4 507 is provided with a pulley group 3 506. A stabilizing plate 508 is provided at the top, and the other ends of rope body 2 503, rope body 3 505 and rope body 4 507 are fixedly connected to an auxiliary plate 509. The three-stage pulley group of pulley group 1 502, pulley group 2 504 and pulley group 3 506 magnifies the gravity of the counterweight 603 by one, two and four times respectively and applies it to the bellows 401. There is also a block on the top plate 101 that stretches the rope body 1 501 connected to the pull block 2 403 to prevent the rope body 1 501 from fitting with the pull block 2 403 due to gravity problems.

[0048] During use, the auxiliary plate 509 or a small amount of counterweight 603 can be used to balance the gravity of the positioning ring 302 through the pulley group. After the positioning ring 302 is adjusted to the appropriate position, the counterweight 603 can be continued to apply axial pressure to the sample. During the creep test, the sample is in a special construction environment, or the temperature and humidity in the bellows 401 cabin are controlled to be constant. At the same time, the load applied to the sample and the axial deformation of the sample are monitored. Through three independent bellows 401, tests can be carried out simultaneously according to different required conditions. The tests do not interfere with each other, which greatly shortens the test cycle. The device uses a pulley group structure to apply load to the sample, which can avoid the jack and hydraulic servo machine from easily The problem of pressure relief and inability to provide long-term stability is solved, and the pulley group applies pressure through three-stage amplification of the gravity of the weights. A small amount of counterweight weights 603 can provide a larger load to the sample. Under normal circumstances, it can be carried directly in a construction environment. Under the construction environment, that is, the environmental conditions inside the mine will directly act on the high-water filling material in the bellows 401. The bellows 401 is made of transparent material during actual use, which is convenient for personnel to observe the high-water filling material. The high-water filling material normally solidifies within ten to thirty minutes when purchased. The special high-water filling material takes even shorter time and can be initially solidified within ten minutes, laying a good foundation for improving the safety of the tunnel.

[0049] The stabilizing mechanism 600 includes a long rod 601 arranged on the surface of the top plate 101, a fixed rod 602 arranged relatively inside the long rod 601, and several groups of counterweights 603 arranged on the surface of the fixed rod 602. The fixed rod 602 is located on both sides of the rope body 507 and does not contact the stabilizing disk 508. However, the stabilizing disk 508 and the counterweights 603 are coaxial and aligned one by one, further reducing the shaking period of multiple groups of rope bodies.

[0050] The fixed rod 602 is arranged perpendicular to the center of gravity of the ground, and a limiting soft ball is arranged on the contact surface with the plurality of groups of counterweights 603. Specific implementation method;

[0052] When in use, the device is moved to the construction environment and allowed to stand for a period of time under the temperature, humidity and other conditions of the construction environment. Then, a tested high-water filling material or an untested material is injected into the bellows 401. When the initial coagulation is achieved in about five minutes, the operation test can be carried out.

[0053] The boosting mechanism 500 connected to the multi-directional rope group 202 and the boosting mechanism 500 connected to the pull block 2 403 are operated to the same pressure balance point to ensure that the pressure added by the boosting mechanism 500 connected to the multi-directional rope group 202 is equal to that of the other boosting mechanisms 500. Then, the counterweight 603 on the stabilizing mechanism 600 is applied above the stabilizing disk 508 on the boosting mechanism 500 connected to the multi-directional rope group 202 so that one side of each bellows 401 is subjected to the same pressure. Then, the rope body 1 501 connected to the pull block 2 403 is adjusted respectively to balance the pressure of each bellows 401. Different pressures are applied to the high-water filling material inside the bellows 401, and tests are carried out on multiple lines. The pressure sensor and displacement sensor monitor the axial pressure and deformation of the sample in real time. The tension applied to the rope body 1 501 is converted into the tension applied to the pulley group 2 504 through the rope body 2 503. Similarly, the gravity of the weight is amplified through three stages to apply pressure. Subsequently, the data of the pressure sensor and displacement sensor of the bellows 401 are observed and recorded. After the creep of the material reaches the qualified range, the qualified material is put into use.

[0054] The above describes an embodiment of the present invention, but this embodiment is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Ordinary technicians in this field can also make more forms of equivalent embodiments based on the inspiration of this embodiment, all of which are protected by this embodiment.

Claims

1. A constant temperature compression creep test device, characterized in that: include; A base (100), a top plate (101) is fixedly connected to the surface of the base (100), and a plurality of fixed pulleys (102) are provided on the surface of the top plate (101); The coordination mechanism (200) is arranged on the surface of the top plate (101) perpendicular to the center of gravity of the ground, and cooperates with the fixed pulley (102). In the working state, it provides a unidirectional pressure for the creep test material; An orientation mechanism (300) is disposed inside the base (100); An observation mechanism (400) is provided inside the orientation mechanism (300) to assist in testing the creep material and provide test data for the test state of the test material; A pressurizing mechanism (500) is provided on the coordination mechanism (200) and the observation mechanism (400) and performs a fit test based on a creep material state; The stabilizing mechanism (600) is arranged on the surface of the top plate (101) perpendicular to the center of gravity direction of the ground, and is used to quickly stabilize the boosting mechanism (500).

2. The constant temperature compression creep test device according to claim 1, characterized in that: The coordination mechanism (200) includes a second fixed pulley (201) arranged on the surface of the top plate (101), and a multi-directional rope group (202) sliding inside the second fixed pulley (201).

3. The constant temperature compression creep test device according to claim 2, characterized in that: The number of the bases (100) is the same as the number of the strands of the multi-directional rope group (202), and is rotationally connected to the fixed pulley (102).

4. The constant temperature compression creep test device according to claim 3, characterized in that: The orientation mechanism (300) comprises a folding rod (301) arranged inside the base (100), and a positioning ring (302) arranged at the end of the folding rod (301).

5. The constant temperature compression creep test device according to claim 4, characterized in that: The observation mechanism (400) includes a bellows (401) arranged on a positioning ring (302), a pull block 1 (402) arranged at the end of the bellows (401), and a pull block 2 (403) sliding inside the pull block 1 (402).

6. The constant temperature compression creep test device according to claim 5, characterized in that: The pull block 1 (402) and the pull block 2 (403) are in the same horizontal plane, slide towards or away from each other and restrict each other, and the pull block 1 (402) and the pull block 2 (403) in contact with the bellows (401) are both installed with pressure sensors and displacement sensors.

7. The constant temperature compression creep test device according to claim 6, characterized in that: The ends of the multi-directional rope group (202) are fixedly connected to the pull block (402).

8. The constant temperature compression creep test device according to claim 7, characterized in that: The boosting mechanism (500) includes a rope body one (501) arranged on a multi-directional rope group (202) and a pull block two (403), the end of the rope body one (501) is fixedly connected to a pulley group one (502), the pulley group one (502) is internally slidably connected to the rope body two (503), the end of the rope body two (503) is provided with a pulley group two (504), the pulley group two (504) is internally slidably connected to the rope body three (505), the end of the rope body three (505) is provided with a pulley group three (506), the pulley group three (506) is internally slidably connected to the rope body four (507), the end of the rope body four (507) is provided with a stabilizing disk (508), and the other ends of the rope body two (503), the rope body three (505) and the rope body four (507) are fixedly connected to an auxiliary disk (509).

9. The constant temperature compression creep testing device according to claim 8, characterized in that: The stabilizing mechanism (600) comprises a long rod (601) arranged on the surface of the top plate (101), a fixed rod (602) relatively arranged inside the long rod (601), and several groups of counterweights (603) arranged on the surface of the fixed rod (602).

10. The constant temperature compression creep testing device according to claim 9, characterized in that: The fixed rod (602) is arranged perpendicular to the center of gravity of the ground, and a limiting soft ball is arranged on the contact surface with the plurality of groups of counterweights (603).

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