CN210893964U - Shear apparatus loading device - Google Patents
Shear apparatus loading device Download PDFInfo
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- CN210893964U CN210893964U CN201921532048.1U CN201921532048U CN210893964U CN 210893964 U CN210893964 U CN 210893964U CN 201921532048 U CN201921532048 U CN 201921532048U CN 210893964 U CN210893964 U CN 210893964U
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Abstract
The utility model provides a shear apparatus loading device, include: the reaction plate is arranged at the top of the reaction frame; the loading system comprises a hydraulic jack, and the bottom of the hydraulic jack is connected with the reaction plate through a constant-stiffness compression spring; the loading plate is used for applying normal load to a shearing box of the shearing instrument, and a piston rod of the hydraulic jack applies pressure to the loading plate. The shear box can be applied with pressure under the condition of maintaining constant rigidity, and the pressure of the rock-soil body on the structure can be accurately simulated, so that the actual condition of the indoor test on the simulation of the actual condition is more in line with objective rules.
Description
Technical Field
The utility model relates to a civil engineering laboratory experiment field especially relates to a shear apparatus loading device.
Background
With the continuous expansion of the quantity and scale of construction projects in China and the continuous increase of the quantity of service-period project projects needing to be maintained, special geological conditions and complex construction environments encountered by construction technicians in China are more and more. For more and more complex conditions, scientific research technicians need to provide a design and calculation method more in line with reality, and at the moment, the essence of engineering problems needs to be searched through indoor experiments. The geotechnical experiment needs to be carried out, actual conditions need to be simulated firstly, and because the pressure of the rock-soil body on the structure in the actual environment is not stably applied, the pressure of the rock-soil body on the structure cannot be simulated accurately by the traditional constant pressure applying device, so that the simulation of the indoor experiment on the actual conditions is further influenced, and the calculation method obtained through the indoor experiment does not accord with objective rules.
SUMMERY OF THE UTILITY MODEL
In view of the above shortcomings of the prior art, an object of the present invention is to provide a loading device under the condition of constant rigidity, which has clear structure, simple operation, convenience and practicality, and can be directly combined with the existing indoor testing device. The device can better simulate the pressure condition of the actual rock-soil mass to the structure, can effectively improve the accuracy of the experiment, and provides a powerful guarantee for the calculation method provided according to the experiment.
To achieve the foregoing and other related objectives, one embodiment of the present invention provides a shear apparatus loading device.
In one embodiment, a shear apparatus loading device comprises:
the reaction plate is arranged at the top of the reaction frame;
the loading system comprises a hydraulic jack, and the bottom of the hydraulic jack is connected with the reaction plate through a constant-stiffness compression spring;
the loading plate is used for applying normal load to a shearing box of the shearing instrument, and a piston rod of the hydraulic jack applies pressure to the loading plate.
The bottom of the hydraulic jack is provided with a loading device fixing plate, and the constant-stiffness compression spring is connected with the loading device fixing plate. The constant-stiffness compression spring is arranged on the loading device fixing plate, so that the contact area of the spring can be increased.
The loading device fixing plate is detachably connected with the bottom of the hydraulic jack. The reaction plate, the spring and the loading device fixing plate jointly play a role in maintaining constant rigidity, and through a detachable mode, the repeated use of related parts can be realized, the parts can be replaced in time after damage, and the applied rigidity can be adjusted according to a plurality of factors such as experimental design requirements and target bearing capacity and an actual rock-soil body environment, so that the real simulation of an experiment on the actual environment is ensured, the accuracy of an experimental result is improved, a calculation method obtained through the experiment is more real and reliable, and the mechanical property in the actual engineering can be reflected more perfectly.
The number of the constant-stiffness compression springs is at least 3, and the constant-stiffness compression springs are uniformly arranged along the plane where the reaction plate is located.
The length of the constant-stiffness compression spring is 10-15cm, so that the loading device is ensured to be in a constant-stiffness condition while the structural stability is kept.
And a pressure sensor for measuring a normal load value is arranged between the piston rod and the loading plate, so that automatic data acquisition and recording of the pressure value can be carried out in real time.
The tip of piston rod is equipped with the draw-in groove, pressure sensor's a terminal surface be equipped with draw-in groove complex bulge, another terminal surface of pressure sensor with loading board top surface horizontal contact can place the pressure sensor roll-off.
And a displacement sensor for measuring the relative displacement between the reaction plate and the loading plate is arranged between the reaction plate and the loading plate, so that the automatic data acquisition and recording of the displacement value can be carried out in real time.
The loading system comprises a control device for controlling the force application magnitude of the hydraulic jack.
The shearing instrument loading device further comprises a data acquisition control device used for acquiring monitoring data and controlling the force application size of the loading device, the data acquisition control device is connected with the loading device, the pressure sensor and/or the displacement sensor, can be controlled by a computer according to design requirements, applies required load, locks the numerical control loading device after the pressure acquisition device displays that the pressure reaches a target value, and the data acquisition system starts to record experimental data.
The embodiment of the utility model provides an above-mentioned technical scheme, locate shearing appearance inside with loading device through the reaction plate, connect through constant rigidity compression spring between reaction plate and the loading device, can guarantee that loading device maintains constant rigidity when applying load to shearing box, and control the normal direction load value of applying to shearing box through loading device, thereby realize to shearing box contact shearing box all the time and apply pressure under maintaining constant rigidity condition, the simulation ground body that can be accurate belongs to the actual conditions of application of force under the constant rigidity condition to the pressure of structure, thereby make the indoor test accord with objective law to actual conditions's simulation more.
Drawings
Fig. 1 is a schematic structural diagram of a shear apparatus loading device according to an embodiment of the present invention;
fig. 2 is a top view of the pressure sensor according to an embodiment of the present invention;
fig. 3 is a bottom view of the piston rod according to the embodiment of the present invention;
fig. 4 shows a schematic structural diagram of a shear apparatus in an embodiment of the present invention.
Description of the element reference numerals
1 reaction plate
2 displacement sensor
3 load plate
4 bolt hole
5 constant stiffness spring
6 fixed plate of loading device
7 Hydraulic jack
8 pressure sensor
9 piston rod
10 data transmission line
11 reaction frame
12 shear apparatus
Detailed Description
The following description is provided for illustrative purposes, and other advantages and features of the present invention will become apparent to those skilled in the art from the following detailed description.
It should be understood that the structures, ratios, sizes, etc. shown in the drawings of the present specification are only used for matching with the contents disclosed in the specification, so as to be known and read by those skilled in the art, and are not used for limiting the limit conditions that the present invention can be implemented, so that the present invention has no technical essential meaning, and any modification of the structures, changes of the ratio relationship or adjustment of the sizes should still fall within the scope covered by the technical contents disclosed in the present invention without affecting the function and the achievable purpose of the present invention. Meanwhile, the terms such as "upper", "lower", "left", "right", "middle" and "one" used in the present specification are for convenience of description, and are not intended to limit the scope of the present invention, and changes or adjustments of the relative relationship thereof may be made without substantial technical changes, and the present invention is also regarded as the scope of the present invention.
In the description of the present invention, it should be noted that, unless otherwise explicitly stated or limited, the terms "disposed" and "connected" are to be interpreted broadly, and may be, for example, a fixed connection, a detachable connection, or an integral connection; can be mechanically or electrically connected; may be directly connected or indirectly connected through an intermediate. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.
The embodiment of the application provides a shear apparatus loading device capable of maintaining loading under a constant rigidity condition, which comprises a constant rigidity maintaining system, a loading system and an automatic data acquisition system.
As shown in fig. 1, the constant stiffness maintaining system includes a reaction plate 1, a constant stiffness compression spring 5 fixed on the reaction plate 1, and a loading device fixing plate 6; the loading system comprises a hydraulic jack 7; the automatic data acquisition system comprises a pressure sensor 8, a displacement sensor 2 and terminal equipment for acquiring monitoring data.
Wherein, the reaction plate 1 is arranged at the top end of the reaction frame 11. The reaction plate 1 is provided with a plurality of bolt holes 4, and the bolts passing through the bolt holes 4 can fasten the reaction plate 1 on the reaction frame 11. One side of the reaction plate 1 is welded with 4 uniformly distributed constant-stiffness compression springs 5, and the other end of each constant-stiffness compression spring 5 is welded with a loading device fixing plate 6.
The fixing manner of the reaction plate 1 and the reaction frame 11 may be a detachable connection, including but not limited to a threaded connection, a snap connection, or a connection through a connector, etc., and is within the protection scope of the present application. It is understood that the case of a fixed connection of the reaction plate 1 to the reaction frame 11 is also within the scope of the present application.
In addition, the number of the constant-stiffness compression springs 5 can be set according to the simulated actual geological condition, and can be one or more, and the number of the constant-stiffness compression springs is within the protection scope of the application. The connection mode of constant stiffness compression spring 5 and reaction plate 1 and loading device fixed plate 6 is not only limited to the welding, but also can realize the utility model creation as long as can realize fixed connection, all within the protection scope of this application.
The loading device fixing plate 6 is fixedly connected with a base of the hydraulic jack 7 through a bolt, the hydraulic jack 7 is a commercially available jack, is provided with a numerical control loading system, and can be loaded as required.
The automatic data acquisition system comprises a pressure sensor 8, a displacement sensor 2 and terminal equipment for acquiring monitoring data. Wherein, pressure sensor 8 establishes between piston rod 9 front end and load plate 3: pressure sensor 8 adopts vibrating wire formula pressure sensor, and its major structure is discoid, and pressure sensor 8's one side is equipped with and ring groove assorted annular bulge, during the installation, places pressure sensor's annular bulge in ring groove. One surface of the pressure sensor is contacted with the end surface of the loading plate, and the bottom surface of the loading plate is contacted with the top surface of a shearing box arranged in the shearing instrument. When in use, the hydraulic jack piston rod 9 applies pressure to the top of the shear box through the pressure sensor 8 and the loading plate 3. The pressure sensor can conveniently realize the monitoring of the pressure value; the design of the annular groove at the end part of the piston rod and the annular bulge of the pressure sensor can effectively prevent the pressure sensor from slipping out.
The pressure sensor 8 can be a vibrating wire pressure sensor, and one side of the pressure sensor is provided with a data transmission line 10 led out.
It can be understood that the utility model discloses the circumstances to not setting up annular groove and annular bulge to and the circumstances that recess and bulge adopted other shapes can all realize the utility model discloses create, all are within the scope of protection of this application.
A displacement sensor 2 perpendicular to the reaction plate 1 is provided between the reaction plate 1 and the loading plate 3, thereby measuring the relative displacement between the reaction plate 1 and the loading plate 3. The displacement sensor 2 can be an LVDT resilience type displacement sensor.
The pressure sensor 8 and the displacement sensor 2 are both connected to a terminal device with a data acquisition module, and the terminal device may be various electronic devices with chips and display interfaces, including but not limited to personal computers, smart phones, smart televisions, tablet computers, and the like.
The installation and use method of the shear apparatus 12 loading device capable of maintaining constant rigidity provided by the embodiment of the application comprises the following steps:
A. determining the installation position of the reaction plate 1 according to an actually required pressurization scheme, and installing the reaction plate 1 through a positioning bolt hole 4 on the reaction plate 1;
B. according to design requirements, selecting a spring with proper rigidity to be arranged at the lower part of the reaction plate 1 so as to provide a stable rigidity condition;
C. sequentially installing a loading system and a pressure sensor at the lower part of a constant stiffness maintaining system, installing a displacement sensor between a reaction plate 1 and a loading plate 3, and debugging the loading system and an automatic data acquisition system;
D. the required load is applied under the control of a computer according to the design requirement, the loading system is locked after the pressure acquired by the pressure sensor reaches a target value, and the data acquisition system starts to record experimental data;
E. after the experiment is finished, the loading system unloads, and each part is dismantled in parts, cleaned and properly stored.
The advantages of this embodiment are: the constant rigidity maintaining system, the loading system and the automatic data acquisition system which are contained in the shear apparatus loading device and loaded under the condition of maintaining constant rigidity are detachable structures, can be repeatedly used and can be replaced in time after damage. The shear apparatus loading device which maintains the loading under the constant stiffness condition can adjust the applied stiffness by adjusting the number of the constant stiffness compression springs according to a plurality of factors such as experiment design requirements, target bearing capacity and the actual rock-soil body environment, thereby ensuring the real simulation of the experiment on the actual environment, improving the accuracy of the experiment result, ensuring that the calculation method obtained by the experiment is more real and reliable, and being capable of reflecting the mechanical property in the actual engineering more perfectly.
The above embodiments are merely illustrative of the principles and effects of the present invention, and are not to be construed as limiting the invention. Modifications and variations can be made to the above-described embodiments by those skilled in the art without departing from the spirit and scope of the present invention. Accordingly, it is intended that all equivalent modifications or changes which may be made by those skilled in the art without departing from the spirit and technical spirit of the present invention be covered by the claims of the present invention.
Claims (10)
1. A shear apparatus loading device, comprising:
the reaction plate is arranged at the top of the reaction frame;
the loading system comprises a hydraulic jack, and the bottom of the hydraulic jack is connected with the reaction plate through a constant-stiffness compression spring;
the loading plate is used for applying normal load to a shearing box of the shearing instrument, and a piston rod of the hydraulic jack applies pressure to the loading plate.
2. The shear apparatus loading device of claim 1, wherein the bottom of the hydraulic jack is provided with a loading device fixing plate, and the constant stiffness compression spring is connected with the loading device fixing plate.
3. The shear apparatus loading device of claim 2, wherein the loading device fixing plate is removably connected to the bottom of the hydraulic jack.
4. The shear meter loading device of claim 1, wherein the constant rate compression springs are at least 3.
5. The shear device loading apparatus of claim 4, wherein each of the constant rate compression springs is uniformly disposed along the plane of the reaction plate.
6. The shear meter loading device of claim 1, wherein the constant rate compression spring is 10-15cm in length.
7. The shear meter loading device of claim 1, wherein a pressure sensor is provided between the piston rod and the loading plate to measure a normal load value.
8. The shear apparatus loading device of claim 7, wherein the end of the piston rod is provided with a slot, one end surface of the pressure sensor is provided with a protrusion part matched with the slot, and the other end surface of the pressure sensor is horizontally contacted with the top surface of the loading plate.
9. The shear meter loading device of claim 1 or 7, wherein a displacement sensor is provided between the reaction plate and the load plate to measure the relative displacement between the reaction plate and the load plate.
10. The shear apparatus loading device of claim 1, wherein the loading system includes a control device to control the amount of force applied by the hydraulic jack.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921532048.1U CN210893964U (en) | 2019-09-16 | 2019-09-16 | Shear apparatus loading device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921532048.1U CN210893964U (en) | 2019-09-16 | 2019-09-16 | Shear apparatus loading device |
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| CN210893964U true CN210893964U (en) | 2020-06-30 |
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| CN201921532048.1U Active CN210893964U (en) | 2019-09-16 | 2019-09-16 | Shear apparatus loading device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113776961A (en) * | 2021-08-31 | 2021-12-10 | 重庆交通大学 | Temperature and pressure synchronous loading device and method suitable for rock dynamics test |
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2019
- 2019-09-16 CN CN201921532048.1U patent/CN210893964U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113776961A (en) * | 2021-08-31 | 2021-12-10 | 重庆交通大学 | Temperature and pressure synchronous loading device and method suitable for rock dynamics test |
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