Geotechnical compaction test device

Abstract

The compaction test device comprises a workbench, a support, a charging barrel, a driving hammer and a lifting driver, the charging barrel and the support are fixedly installed on the workbench, the driving hammer is arranged above the charging barrel, the driving hammer is connected with the lifting driver, the lifting driver is fixedly installed on the support, a demolding opening is formed in the bottom of the charging barrel, and a supporting end cover is arranged on the demolding opening; a demolding chamber is arranged on the lower side of the workbench, a discharging opening communicated with the demolding opening and the demolding chamber is formed in the workbench, a fixing sleeve is fixedly arranged on the discharging opening, and the side wall of the fixing sleeve is connected with the supporting end cover through a pin. And due to the design of a demolding opening and a supporting end cover at the bottom of the charging barrel, the cylinder sample can be conveniently separated from the charging barrel after compaction is completed. The pin connecting structure enables the supporting end cover to be conveniently opened and closed, and the extraction process of the sample is simplified.

Description

Technical Field

[0001] The present application relates to the technical field of compaction instruments, and in particular to a geotechnical compaction test device. Background Art

[0002] A compactor is a piece of construction equipment, available in heavy-duty manual compactors and CNC multi-function electric compactors. It is primarily used to determine the optimum moisture content and weight per unit volume of compacted soil, serving as a basis for controlling soil moisture and specifying minimum density when constructing roadbeds and fills. Currently, the compactor used in geotechnical compaction tests or forming unconfined compressive strength specimens is a one-piece steel cylinder with two open ends. During use, the compactor is placed on the compactor, a fixed amount of geotechnical sample is added, and compaction is performed to produce a cylindrical specimen. This can be cumbersome to remove after the test. Utility Model Content

[0003] The present application provides a geotechnical compaction test device, which is convenient for extracting cylindrical samples after compaction.

[0004] The present application provides a geotechnical compaction test device that adopts the following technical solution:

[0005] A compaction test device for geotechnical engineering includes a workbench, a bracket, a barrel, a hammer and a lifting drive. The barrel and the bracket are fixedly installed on the workbench, a hammer is arranged above the barrel, the hammer is connected to the lifting drive, and the lifting drive is fixedly installed on the bracket. A demolding port is provided at the bottom of the barrel, and a support end cover is provided on the demolding port. A demolding chamber is provided on the lower side of the workbench, and a blanking port connecting the demolding port and the demolding chamber is provided on the upper side of the workbench. A fixed sleeve is fixed on the blanking port, and the side wall of the fixed sleeve is connected to the support end cover by a pin.

[0006] For further improvement, the workbench is provided with a vertical guide sleeve, a guide column is slidably installed in the vertical guide sleeve, and the guide column is fixedly connected to the support end cover.

[0007] For further improvement, an electric telescopic rod is provided between the guide column and the workbench or the bracket.

[0008] To further improve, a mold barrel is installed in a sliding manner in the barrel, and the mold barrel is composed of two semicircular cylinders. A positioning plug is provided at the bottom of the semicircular cylinder, and a positioning hole is provided on the supporting end cover. The positioning plug and the positioning hole are plugged into each other.

[0009] For further improvement, the lifting drive includes a motor, a brake, a rope winder, an energy storage spring, a pull rope and a compaction guide rod. The motor is connected to the reducer, the reducer is connected to the rope winder, the rope winder is connected to the brake, one end of the pull rope is fixedly connected to the rope winder, and the other end of the pull rope is fixedly connected to the compaction guide rod, the compaction guide rod is slidably connected to the bracket, the energy storage spring is arranged between the compaction guide rod and the bracket, and the lower end of the compaction guide rod is detachably fixedly connected to the hammer.

[0010] In summary, this application includes at least one of the following beneficial technical effects:

[0011] 1. The design of the demoulding port and support end cap at the bottom of the barrel allows the cylindrical specimen to be easily removed from the barrel after compaction. The pin connection between the support end cap and the fixed sleeve allows the support end cap to be easily opened and closed, simplifying the sample extraction process.

[0012] 2. The blanking port on the workbench is connected to the demoulding port, ensuring that the cylindrical specimen can be accurately dropped into the demoulding chamber through the fixing sleeve, thus avoiding damage or deformation of the specimen during the extraction process.

[0013] 3. The design of the demoulding port and support end cover facilitates cleaning and maintenance of the barrel, helping to maintain the long-term stable operation of the test equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a structural diagram of the compaction device when the supporting end cover is pinned.

[0015] Figure 2 yes Figure 1 A magnified schematic diagram of the local structure.

[0016] Figure 3 It is a schematic diagram of the structure of the compaction device when extracting the sample after the pin is pulled out.

[0017] Explanation of the accompanying reference numerals: 1. workbench, 2. bracket, 3. barrel, 4. hammer, 5. lifting drive, 6. demoulding port, 7. support end cover, 8. demoulding chamber, 9. blanking port, 10. fixing sleeve, 11. pin connection, 12. vertical guide sleeve, 13. guide column, 14. energy storage spring, 15. electric telescopic rod, 16. semicircular cylinder, 17. positioning plug, 18. positioning jack, 19. motor, 20. reducer, 21. brake, 22. rope winder, 23. pull rope, 24. compaction guide rod. DETAILED DESCRIPTION

[0018] The following is combined with Figure 1-3 This application is described in further detail.

[0019] The embodiment of the present application discloses a geotechnical compaction test device.

[0020] Reference Figure 1 A geotechnical compaction test device comprises a workbench 1, a support 2, a barrel 3, a hammer 4, and a lift actuator 5. The barrel 3 and support 2 are fixedly mounted on the workbench 1, which serves as the foundation of the entire device. The barrel 3, a container for the soil sample to be compacted, is fixed to the workbench 1. The hammer 4 is mounted above the barrel 3 and is used to impact and compact the soil sample. The support 2 provides the necessary support for the entire device.

[0021] A hammer 4 is provided above the barrel 3 and connected to a lifting actuator 5 fixedly mounted on the bracket 2. The hammer 4 is moved up and down by the lifting actuator 5, thereby controlling the hammer 4 to compact the soil sample in the barrel 3. A demoulding opening 6 is provided at the bottom of the barrel 3, which is designed to facilitate demoulding after compaction.

[0022] A support end cover 7 is provided on the demoulding port 6, and a demoulding chamber 8 is provided on the lower side of the workbench 1. The demoulding chamber 8 is used to receive the cylindrical sample dropped from the demoulding port 6. A drop-out port 9 is provided on the workbench 1, which connects the demoulding port 6 and the demoulding chamber 8 to ensure that the sample falls smoothly into the demoulding chamber 8. A fixing sleeve 10 is fixedly provided on the drop-out port 9, and a pin connection 11 is adopted between the side wall of the fixing sleeve 10 and the support end cover 7. Side holes are provided on both the fixing sleeve 10 and the support end cover 7, and pins are installed on the side holes. The fixing sleeve 10 and the support end cover 7 can be quickly connected and separated by the pin connection 11. This design simplifies the demoulding process and facilitates the operator to quickly remove the sample.

[0023] Compaction Process: At the start of the test, the soil sample is placed in the barrel 3. The hammer 4, controlled by the lift drive 5, impacts the soil sample a predetermined number of times to achieve the desired density. The support cap 7 is positioned over the demolding opening 6 during the compaction process, forming the soil sample together with the cavity in the barrel 3 and providing necessary support during demolding.

[0024] Demolding process: After compaction is completed, pull out the pin, release the pin connection 11 between the support end cover 7 and the fixed sleeve 10, separate the support end cover 7, and use gravity, hammer pressure, or push down with tools such as hands to make the cylindrical sample fall through the demoulding port 6 into the blanking port 9 and finally enter the demoulding chamber 8.

[0025] In order to improve the operating accuracy and stability of the device, a vertical guide sleeve 12 is provided on the workbench 1, and a guide column 13 is slidably installed in the vertical guide sleeve 12. This design allows the guide column 13 to move in the vertical direction while maintaining stable and precise guidance. The guide column 13 is fixedly connected to the support end cover 7. The structural design of the vertical guide sleeve 12 and the guide column 13 helps to improve the stability of the entire device, especially when performing a compaction test, to ensure the alignment and fixation of the support end cover 7 and the barrel 3. During the demolding process, the support end cover 7 is separated from the demolding port 6 by the sliding of the guide column 13, which facilitates the removal of the cylindrical sample.

[0026] Reference Figure 2 In order to improve the operational convenience and automation level of the test device, an electric telescopic rod 15 is provided between the guide column 13 and the workbench 1 or the bracket 2. The electric telescopic rod 15 is automatically extended and retracted by electric drive, which reduces the workload of manually adjusting the height of the guide column 13. The operator can quickly adjust the height of the support end cover 7 through the electric control system, which improves the efficiency of the test preparation and demolding process. It reduces the possible misoperation during manual adjustment and reduces safety risks. The addition of the electric telescopic rod 15 brings many advantages to the geotechnical compaction test device, such as automation, precise control and easy operation, which improves the efficiency of the test and enhances the stability and safety of the device.

[0027] In order to adapt to the production of cylindrical soil samples of different diameters, a mold barrel is installed in a sliding manner in the barrel 3. The mold barrel is composed of two semicircular cylinders 16, which are easy for the operator to assemble and disassemble quickly, thereby improving the efficiency of the preparation and end stages of the test. The two semicircular cylinders 16 of the mold barrel are spliced ​​together to form the required cylindrical space, ensuring that the soil sample maintains the correct shape and size during the compaction process. A positioning plug 17 is provided at the bottom of the semicircular cylinder 16, and a positioning socket 18 is provided on the support end cover 7. The positioning plug 17 and the positioning socket 18 are plugged in and matched. This plug-in fit of the plug and the socket ensures that the two semicircular cylinders 16 of the mold barrel can be accurately aligned and fixed together. After the compaction is completed, the support end cover 7 can be moved to the appropriate position through the cooperation of the guide column 13 and the electric telescopic rod 15, so that the mold barrel can be smoothly removed from the barrel 3, making it convenient to take out the formed cylindrical soil sample.

[0028] Reference Figure 3, the lifting drive 5 can be implemented by various existing technical means such as cylinders and screw lifters. In addition to the existing structure, the following introduces a lifting drive 5 structure that uses spring elastic potential energy and gravitational potential energy for compaction, providing an efficient, precise and controllable lifting mechanism. The lifting drive 5 includes a motor 19, a brake 21, a rope reel 22, an energy storage spring 14, a pull rope 23 and a compaction guide rod 24. The motor 19 is connected to the reducer 20, the reducer 20 is connected to the rope reel 22, the rope reel 22 is connected to the brake 21, one end of the pull rope 23 is fixedly connected to the rope reel 22, and the other end of the pull rope 23 is fixedly connected to the compaction guide rod 24. The pull rope 23 transmits power and controls the vertical movement of the compaction guide rod 24, so that the hammer 4 can flexibly adjust the height according to the test requirements. The compaction guide rod 24 is slidably connected to the bracket, and the compaction guide rod 24 is a mechanical component connecting the lifting drive 5 and the hammer 4. The energy storage spring 14 is arranged between the compacting guide rod 24 and the bracket, and the lower end of the compacting guide rod 24 is detachably fixedly connected to the hammer, such as by a threaded connection.

[0029] During use, the motor 19 acts as a power source, driving the rope reel 22 to control the rise and fall of the hammer 4. The speed reducer 20 is used to reduce the motor speed, increase the torque, and ensure the stable movement of the hammer 4. The rope reel 22 is wound around the pull rope 23, and controls the rise and fall of the compaction guide rod 24 by retracting and releasing the pull rope. The energy storage spring 14 releases energy when the hammer 4 descends and compresses to store energy when it ascends, assisting in the rapid resetting of the hammer 4 for the strike. The brake 21 is connected to the rope reel 22 and can quickly stop the rotation of the rope reel when necessary, ensuring that the hammer 4 is stably positioned at the specified position. When the brake 21 is unlocked, the rope reel 22 releases the pull rope 23, controlling the hammer to fall for the strike. The addition of the brake 21 improves the safety of the system, ensuring that the position of the hammer 4 can be controlled at all times to prevent accidents. The design of the entire lifting drive 5 allows for automated control of the rise and fall of the hammer 4, improving the efficiency and repeatability of the test.

[0030] The above are all preferred embodiments of the present application, and are not intended to limit the scope of protection of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the scope of protection of the present application.

Claims

1. A geotechnical compaction test device, comprising a workbench (1), a bracket (2), a barrel (3), a hammer (4) and a lifting drive (5), wherein the barrel (3) and the bracket (2) are fixedly mounted on the workbench (1), a hammer (4) is arranged above the barrel (3), the hammer (4) is connected to the lifting drive (5), and the lifting drive (5) is fixedly mounted on the bracket (2), characterized in that: The bottom of the barrel (3) is provided with a demoulding port (6), and a supporting end cover (7) is provided on the demoulding port (6). A demoulding chamber (8) is provided on the lower side of the workbench (1). A blanking port (9) communicating with the demoulding port (6) and the demoulding chamber (8) is provided on the upper side of the workbench (1). A fixing sleeve (10) is fixedly provided on the blanking port (9), and a pin connection (11) is adopted between the side wall of the fixing sleeve (10) and the supporting end cover (7).

2. A geotechnical compaction test device according to claim 1, characterized in that: The workbench (1) is provided with a vertical guide sleeve (12), a guide post (13) is slidably installed in the vertical guide sleeve (12), and the guide post (13) is fixedly connected to the support end cover (7).

3. A geotechnical compaction test device according to claim 2, characterized in that: An electric telescopic rod (15) is provided between the guide column (13) and the workbench (1) or the bracket (2).

4. A geotechnical compaction test device according to claim 1, characterized in that: A mold barrel is slidably mounted in the barrel (3), and the mold barrel is composed of two semicircular cylinders (16) spliced ​​together. A positioning plug (17) is provided at the bottom of the semicircular cylinder (16), and a positioning socket (18) is provided on the supporting end cover (7). The positioning plug (17) and the positioning socket (18) are plugged and matched.

5. The geotechnical compaction test device according to claim 1, characterized in that: The lifting drive (5) includes a motor (19), a brake (21), a rope reel (22), an energy storage spring (14), a pull rope (23) and a compacting guide rod (24), wherein the motor (19) is connected to a reducer (20), the reducer (20) is connected to the rope reel (22), the rope reel (22) is connected to the brake (21), one end of the pull rope (23) is fixedly connected to the rope reel (22), the other end of the pull rope (23) is fixedly connected to the compacting guide rod (24), the compacting guide rod (24) is slidably connected to the bracket, the energy storage spring (14) is arranged between the compacting guide rod (24) and the bracket, and the lower end of the compacting guide rod (24) is detachably fixedly connected to the hammer.

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