CN210221701U - Rock test system - Google Patents
Rock test system Download PDFInfo
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- CN210221701U CN210221701U CN201921055788.0U CN201921055788U CN210221701U CN 210221701 U CN210221701 U CN 210221701U CN 201921055788 U CN201921055788 U CN 201921055788U CN 210221701 U CN210221701 U CN 210221701U
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Abstract
The utility model discloses a rock test system, which comprises a loading frame, a loading oil cylinder and a pressure chamber, wherein the pressure chamber is arranged inside the loading frame and is positioned at the bottom of the loading frame; the loading oil cylinder is arranged above the loading frame, the top of the loading frame is provided with a piston hole, a piston of the loading oil cylinder penetrates through the piston hole, and the bottom of the piston of the loading oil cylinder is matched with the pressure chamber to provide axial stress. The utility model aims to provide a: aiming at the problems existing in the mode that the loading oil cylinder of the existing rock test system is arranged at the lower part and the pressure chamber is arranged at the upper part, the rock test system is provided. According to the test system, the loading oil cylinder is arranged above the pressure chamber, so that the problems can be avoided.
Description
Technical Field
The utility model belongs to the technical field of rock mechanical properties test equipment. In particular, it relates to a rock testing system.
Background
Rock test equipment (system) is an important means for researching the mechanical property of rock, and the measured test data is an important parameter of the mechanical property of rock. The mechanical property of rock and soil under the original ground stress state can be completely simulated, wherein the research on the mechanical properties under the uniaxial state and the triaxial state is an important basis of engineering design.
At present, relatively common rock test equipment is a rock triaxial testing machine, and the main function of the rock triaxial testing machine is used for rock uniaxial tests, triaxial tests, seepage tests and the like. As shown in fig. 1-2, the main structure of the device comprises a loading frame, a loading oil cylinder, an oil source system, a confining pressure and back pressure loading system, a load sensor, a pressure chamber, a trolley mechanism, a hoisting mechanism and the like. The oil source system provides high-pressure driving force for the loading oil cylinder, so that the loading oil cylinder can output pressure or pulling force with a certain tonnage; the confining pressure and back pressure loading system provides ambient and back pressure to the sample. The pressure chamber adopts a buckling structure to connect the outer cylinder and the base with each other, and a self-reaction structure is formed to bear the pressure of confining pressure.
The actuator (i.e., the loading cylinder) is mounted below the loading frame, the load sensor is mounted above the loading frame, and the pressure chamber is mounted on a carriage mechanism that is movable along the rails. During the test, the actuator piston lifts the pressure chamber and the trolley mechanism upwards until the pressure chamber piston is contacted with the load sensor, and then the system starts to perform the triaxial test.
And hoisting mechanisms are arranged on two sides (or one side) of the loading frame, so that the pressure chamber outer cylinder can be hoisted away from the trolley mechanism, and the operation of installing the sample on the pressure chamber base is completed.
The technical problems of the rock test system are as follows:
firstly, a pressure chamber is required to be lifted upwards through a loading oil cylinder during a test, and axial force can not be provided for a sample until a pressure chamber piston is contacted with a load sensor, so that the stroke required by the loading oil cylinder is large, and the height of a loading frame is high;
secondly, the pressure chamber is subjected to suspension stress, the danger coefficient is large, and a dynamic simulation test cannot be carried out due to large inertia mass;
and thirdly, the loading oil cylinder is arranged in the loading frame, so that the requirements on the processing of the loading frame and the assembly of the whole machine are higher.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a: aiming at the problems existing in the mode that the loading oil cylinder of the existing rock test system is arranged at the lower part and the pressure chamber is arranged at the upper part, the rock test system is provided. According to the test system, the loading oil cylinder is arranged above the pressure chamber, so that the problems can be avoided.
In order to realize the purpose, the utility model discloses a technical scheme be:
a rock test system comprises a loading frame, a loading oil cylinder and a pressure chamber, wherein the pressure chamber is arranged in the loading frame and is positioned at the bottom of the loading frame; the loading oil cylinder is arranged above the loading frame, the top of the loading frame is provided with a piston hole, a piston of the loading oil cylinder penetrates through the piston hole, and the bottom of the piston of the loading oil cylinder is matched with the pressure chamber to provide axial stress. The loading oil cylinder is arranged above the loading frame, so that the height of the loading oil cylinder can be reduced, and the assembly is more convenient. And the pressure chamber is placed in a loading frame, and a loading oil cylinder piston dynamically acts on the pressure chamber and a sample to realize axial stress loading, so that the loading stroke is shorter, and simultaneously, the stability is better because the pressure chamber is placed still, and a dynamic simulation test can be carried out.
As a preferred scheme, the loading frame is a rectangular structure formed by mutually assembling an upper cross beam, a lower cross beam, a left vertical beam and a right vertical beam. Through the assembly scheme, the loading frame is more convenient to manufacture, transport and install.
As a preferred scheme, the pressure chamber comprises a pressure transmission cylinder and a base, the top of the pressure transmission cylinder is used for being connected with the top of the loading frame, the bottom of the base is used for being connected with the bottom of the loading frame, and the base and the pressure transmission cylinder are coaxially arranged; a hollow part for accommodating a piston of the loading oil cylinder is arranged in the pressure transmission cylinder, and an interval for placing a sample is reserved between the base and the pressure transmission cylinder; the test chamber is characterized by further comprising a pressure bearing cylinder, wherein the upper portion of the pressure bearing cylinder is sleeved on the pressure transmitting cylinder, the lower portion of the pressure bearing cylinder is sleeved on the base to form a test chamber for placing a sample, and the pressure bearing cylinder is connected with the pressure transmitting cylinder and the base in a sliding mode to open or close the test chamber. This scheme provides a pressure chamber structure convenient to test operation, makes test efficiency higher.
Preferably, the load sensor is arranged in the pressure chamber, and the load sensor is arranged below the loading oil cylinder piston. The load sensor is arranged in the device, so that load measurement is directly carried out on a sample, other errors are avoided, and measurement data are more accurate.
Preferably, the device further comprises a confining pressure and back pressure loading system for providing ambient pressure and back pressure for the sample, and the pressure chamber base is provided with a pressure injection hole communicated with the confining pressure and back pressure loading system. According to the requirements of the experiment on confining pressure and back pressure, the scheme is that the pressure injection hole connected with the confining pressure and back pressure loading system is arranged on the pressure chamber base, so that the confining pressure and the back pressure are provided for the pressure chamber.
As the preferred scheme, still include the hoisting machine who is used for hoisting the bearing cylinder construct, hoisting machine constructs the top and links to each other with the loading frame entablature, and the bottom links to each other with the bearing cylinder. This scheme is passed through hoisting machine and is constructed, the experimental operation of being convenient for.
As the preferred scheme, the device also comprises a trolley mechanism used for moving the pressure chamber and a matched track, and the pressure chamber base is arranged on the trolley mechanism. This scheme is passed through hoisting machine and is constructed, the experimental operation of being convenient for.
Preferably, the hydraulic control system further comprises an oil source system for providing driving force for the loading oil cylinder, and the oil source system is connected with the loading oil cylinder. This scheme provides oil source system for test system.
To sum up, owing to adopted above-mentioned technical scheme, compare in prior art, the beneficial effects of the utility model are that:
the pressure chamber is stably placed on the lower cross beam of the loading frame, the bearing force is reliable, and the dynamic loading simulation test can be completed due to the standing of the pressure chamber;
secondly, the loading oil cylinder is arranged above the upper cross beam, so that the installation and the maintenance are convenient;
and thirdly, the stroke of the loading oil cylinder is determined according to the deformation of the sample, and the lifting height space of the outer cylinder is not required to be reserved.
Drawings
Fig. 1 is a schematic structural diagram of a prior art rock testing and testing apparatus.
Fig. 2 is a schematic structural diagram of an oil source system and a confining pressure and back pressure loading system.
FIG. 3 is a first schematic structural diagram of the embodiment.
FIG. 4 is a second schematic structural diagram of the embodiment.
Reference numbers for parts in the drawings: 1-loading oil cylinder, 2-loading frame upper beam, 3-pressure transmission cylinder, 4-piston, 5-load sensor, 6-pressure bearing cylinder, 7-base, 8-loading frame lower beam, 9-hoisting mechanism, 10 trolley mechanism and 11-base.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the invention.
Example 1
The embodiment discloses a rock test system, and the basic functions comprise a uniaxial compression full stress-strain test/dynamic cycle test, a triaxial compression full stress-strain test/dynamic cycle test, a hydraulic fracturing test, a seepage test and the like. Related tools are configured to be capable of expanding to complete a high-temperature high-pressure test, a rock rheological test, a Brazilian split test, an acoustic emission test and a true triaxial composite path full stress-strain test.
As shown in fig. 3-4, the present embodiment includes a loading frame, a loading cylinder, and a pressure chamber. The loading frame adopts an assembling structure and is of a rectangular structure formed by mutually assembling an upper cross beam, a lower cross beam, a left vertical beam and a right vertical beam. The loading frame is assembled by four steel plates to form a rectangular structure. The loading frame is placed on the base.
As shown in fig. 3-4, the pressure chamber of the present embodiment is disposed inside the loading frame and on the bottom of the loading frame, i.e., the top surface of the lower beam; the loading oil cylinder is arranged above the loading frame, namely on the top surface of the upper cross beam, the top of the loading frame (the upper cross beam) is provided with a piston hole, a piston of the loading oil cylinder penetrates through the piston hole, and the bottom of the piston of the loading oil cylinder is matched with the pressure chamber to provide axial stress.
And a loading oil cylinder is arranged above the loading frame, and pressure is applied to an internal testing device (pressure chamber) and a test piece to perform testing operation. Compared with the traditional four-upright-column structure, the four-upright-column structure has the advantages of smaller height and volume, convenience in transportation and assembly, better stability, convenience in maintenance and the like.
The technical effects of the embodiment are as follows:
the pressure chamber is stably placed on the lower cross beam of the loading frame, the bearing force is reliable, and the dynamic loading simulation test can be completed due to the standing of the pressure chamber;
secondly, the loading oil cylinder is arranged above the upper cross beam, so that the installation and the maintenance are convenient;
and thirdly, the stroke of the loading oil cylinder is determined according to the deformation of the sample, and the lifting height space of the outer cylinder is not required to be reserved.
Example 2
On the basis of embodiment 1, this embodiment provides a specific pressure chamber structure. Specifically, as shown in fig. 4, the pressure chamber includes a pressure transfer cylinder and a base, the top of the pressure transfer cylinder is used for being connected with the top of the loading frame (i.e., the bottom surface of the upper beam), the bottom of the base is used for being connected with the bottom of the loading frame (i.e., the top surface of the lower beam), and the base and the pressure transfer cylinder are coaxially arranged. The pressure transmission cylinder is internally provided with a hollow part for accommodating a piston of the loading oil cylinder, and an interval for placing a sample is reserved between the base and the pressure transmission cylinder. The test chamber is characterized by further comprising a pressure bearing cylinder, wherein the upper portion of the pressure bearing cylinder is sleeved on the pressure transmitting cylinder, the lower portion of the pressure bearing cylinder is sleeved on the base to form a test chamber for placing a sample, and the pressure bearing cylinder is connected with the pressure transmitting cylinder and the base in a sliding mode to open or close the test chamber.
The pressure chamber adopts a cylindrical piston type structure, the bearing cylinder and the base are not required to be connected together, and the pressure of confining pressure on the upper part and the lower part is respectively transmitted to the loading frame through the pressure transmission cylinder and the pressure chamber base. When the pressure chamber bearing cylinder is lifted to a certain height, a sample can be installed and taken out. When the pressure-bearing cylinder of the pressure chamber is lowered onto the base of the pressure chamber, the test can be started. Based on the scheme, the pressure chamber pressure-bearing cylinder is only required to be lowered onto the pressure chamber base before the test, the loading oil cylinder piston is lowered until the pressure chamber piston contacts the test sample, and the test preparation time is short. And, compare traditional pressure chamber and need withhold and protect, experimental preparation time is longer, the lower problem of efficiency of software testing, the pressure chamber of this scheme is non-self-reaction structure, simple structure, and factor of safety is high, and need not to withhold a pressure cylinder and base withhold or with bolted connection. In addition, aiming at the problems that the traditional test system can only carry out rock triaxial test, the test function is single, and the equipment utilization rate is not high, the later expansibility of the scheme is better.
As shown in fig. 4, the present embodiment has a load cell built into the pressure chamber or test chamber, the load cell being mounted below the load cylinder piston. Aiming at the problems that the load sensor is arranged outside the pressure chamber, the error exists when the axial load borne by the sample is measured, and the error is related to the resistance between the piston of the pressure chamber and the outer cylinder, the scheme is that the load sensor is arranged inside the pressure chamber, the resistance between the piston rod of the pressure chamber and the piston is eliminated when the axial load borne by the sample is measured, and the axial load of the sample is truly reflected by the numerical value.
The embodiment also comprises a confining pressure and back pressure loading system for providing ambient pressure and back pressure for the sample, and a pressure injection hole communicated with the confining pressure and back pressure loading system is arranged on the pressure chamber base.
As shown in fig. 3, the present embodiment further includes a hoisting mechanism for hoisting the carrying cylinder, the top of the hoisting mechanism is connected to the loading frame, and the bottom of the hoisting mechanism is connected to the carrying cylinder. The pressure chamber bearing cylinder can ascend and descend along the bearing cylinder under the action of the hoisting mechanism, and the hoisting mechanism can start the test after lifting the pressure chamber bearing cylinder by a certain height.
As shown in fig. 3, the present embodiment further includes a cart mechanism and a matching track for moving the pressure chamber, wherein the pressure chamber base is disposed on the cart mechanism and can move along the guide rail, and the pressure chamber base and the cart mechanism are pulled out of the station for mounting and removing the sample.
The embodiment also comprises an oil source system for providing high-pressure driving force for the loading oil cylinder, and the oil source system is mutually connected with the loading oil cylinder so that the loading oil cylinder can output pressure or pulling force with certain tonnage.
The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, as any modifications, equivalents, improvements and the like made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.
Claims (8)
1. The utility model provides a rock test system, includes loading frame, loading hydro-cylinder and pressure chamber, its characterized in that: the pressure chamber is arranged inside the loading frame and is positioned at the bottom of the loading frame; the loading oil cylinder is arranged above the loading frame, the top of the loading frame is provided with a piston hole, a piston of the loading oil cylinder penetrates through the piston hole, and the bottom of the piston of the loading oil cylinder is matched with the pressure chamber to provide axial stress.
2. A rock testing and testing system according to claim 1, wherein: the loading frame is a rectangular structure formed by mutually assembling an upper cross beam, a lower cross beam, a left vertical beam and a right vertical beam.
3. A rock testing and testing system according to claim 1, wherein: the pressure chamber comprises a pressure transmission cylinder and a base, the top of the pressure transmission cylinder is used for being connected with the top of the loading frame, the bottom of the base is used for being connected with the bottom of the loading frame, and the base and the pressure transmission cylinder are coaxially arranged; a hollow part for accommodating a piston of the loading oil cylinder is arranged in the pressure transmission cylinder, and an interval for placing a sample is reserved between the base and the pressure transmission cylinder; the test chamber is characterized by further comprising a pressure bearing cylinder, wherein the upper portion of the pressure bearing cylinder is sleeved on the pressure transmitting cylinder, the lower portion of the pressure bearing cylinder is sleeved on the base to form a test chamber for placing a sample, and the pressure bearing cylinder is connected with the pressure transmitting cylinder and the base in a sliding mode to open or close the test chamber.
4. A rock testing and testing system according to claim 3, wherein: the load sensor is arranged in the pressure chamber and is arranged below the loading oil cylinder piston.
5. A rock testing and testing system according to claim 3, wherein: the device also comprises a confining pressure and back pressure loading system for providing ambient pressure and back pressure for the sample, and a pressure injection hole communicated with the confining pressure and back pressure loading system is arranged on the pressure chamber base.
6. A rock testing and testing system according to claim 3, wherein: the hoisting mechanism is used for hoisting the bearing cylinder, the top of the hoisting mechanism is connected with the upper cross beam of the loading frame, and the bottom of the hoisting mechanism is connected with the bearing cylinder.
7. A rock testing and testing system according to claim 3, wherein: the pressure chamber base is arranged on the trolley mechanism.
8. A rock testing and testing system according to claim 1, wherein: the oil source system is used for providing driving force for the loading oil cylinder and is mutually connected with the loading oil cylinder.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921055788.0U CN210221701U (en) | 2019-07-08 | 2019-07-08 | Rock test system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921055788.0U CN210221701U (en) | 2019-07-08 | 2019-07-08 | Rock test system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210221701U true CN210221701U (en) | 2020-03-31 |
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ID=69936682
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921055788.0U Active CN210221701U (en) | 2019-07-08 | 2019-07-08 | Rock test system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210221701U (en) |
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2019
- 2019-07-08 CN CN201921055788.0U patent/CN210221701U/en active Active
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