CN213689316U

CN213689316U - Consolidation permeameter

Info

Publication number: CN213689316U
Application number: CN202022868731.1U
Authority: CN
Inventors: 杨刘堂; 袁龙; 张松
Original assignee: Nanjing Zhilong Technology Development Co ltd
Current assignee: Nanjing Zhilong Technology Development Co ltd
Priority date: 2020-12-02
Filing date: 2020-12-02
Publication date: 2021-07-13
Anticipated expiration: 2030-12-02

Abstract

The utility model discloses a consolidation permeameter, which comprises a force sensor, a permeation container, an upper pressure control device, a lower pressure control device and a consolidation pressurizing mechanism; the infiltration container comprises a cylinder body, an upper end cover, a base, a cutting ring and a pressing plate; the inner wall of the cylinder body is of a stepped hole structure; the pressure plate is connected to the interface of the stepped hole of the cylinder body in a sliding manner and divides the interior of the cylinder body into a first cavity and a second cavity; a piston rod fixedly connected with the force sensor is fixed at the top of the pressure plate; a first channel is arranged on the pressing plate; the upper pressure control device is communicated with the first chamber; the base is fixed on the consolidation pressurizing mechanism; the base is provided with a second channel communicated with the lower pressure control device; through setting up upper portion pressure control device, lower part pressure control device to can directly use the cutting ring of standard to take a sample, need not extrude during the experiment soil sample get into the container in, the direct mount cutting ring can, the vertical disturbance and the side disturbance that the soil sample received when having avoided moving the appearance.

Description

Consolidation permeameter

Technical Field

The utility model relates to a geotechnical test technical field especially relates to a consolidation permeameter.

Background

With the development of technology, more and more underground spaces are developed and utilized, so that the testing requirements of various parameters of application technologies of civil engineering and geotechnical tests are higher and higher, for the current penetration test, an instrument structure and a testing method 50 years ago are still adopted, the conventional penetration test is penetration under the condition that the consolidation pressure and the upper pressure in a sample are not consistent with the actual environment of a soil sample, and the test result has inevitable errors.

SUMMERY OF THE UTILITY MODEL

The utility model discloses the main technical problem who solves is: the consolidation permeameter can apply consolidation pressure different from the upper and lower osmotic pressures to a sample, simulate the actual environment of a field more vividly, reduce sample disturbance in the installation process and facilitate operation.

In order to solve the main technical problems, the following technical scheme is adopted:

a consolidation permeameter comprises a force sensor, a permeation container, an upper pressure control device, a lower pressure control device and a consolidation pressurizing mechanism; the infiltration container comprises a cylinder body, an upper end cover fixed at the top of the cylinder body, a base fixed at the bottom of the cylinder body, a cutting ring positioned in the cylinder body and used for filling a sample, and a pressing plate pressed above the sample; the inner wall of the cylinder body is of a stepped hole structure with the diameter of the top larger than that of the bottom; the pressure plate is connected to the interface of the stepped hole of the cylinder body in a sliding manner and divides the interior of the cylinder body into a first cavity above the pressure plate and a second cavity below the pressure plate; the cutting ring is connected in the second cavity in a sealing way; a piston rod which extends out of the infiltration container and is fixedly connected with the force sensor is fixed at the top of the pressure plate; the pressing plate is provided with a first channel which penetrates through the pressing plate and can be communicated with the first cavity and the second cavity; the upper pressure control device is communicated with the first chamber; the base is fixed on the consolidation pressurizing mechanism and can drive the cylinder to lift along the piston rod; the base is provided with a second channel penetrating through the base; the second passage communicates with a lower pressure control device.

Preferably, the consolidation pressurizing mechanism is fixed in the case; the upper part of the case is fixed with an upright post; a cross beam is fixed at the top of the upright post; the force sensor is fixed on the cross beam through a fixing seat.

Preferably, an upper exhaust plug communicated with the first chamber and the outside of the infiltration container is arranged on the upper end cover; and a lower exhaust plug communicated with the second chamber and the outside of the infiltration container is arranged on the base.

Preferably, a permeable stone is placed between the pressure plate and the sample; the end surface of the bottom of the cutting ring is flush with the upper surface of the base; the base is provided with a groove which is sunken downwards and is opposite to the side of the cutting ring, and a lower permeable stone is placed in the groove.

Preferably, three rings of sealing rings are sleeved on the outer side of the cutting ring; the inner wall of the cylinder body is correspondingly provided with a sealing groove which can clamp three rings of sealing rings.

Preferably, the barrel is a transparent structure made of organic glass material.

Preferably, the upper pressure control device and the lower pressure control device are both hydraulic control devices.

Preferably, the consolidation pressurizing mechanism comprises a pressurizing platform, a pressurizing screw rod and a driving motor; the pressurizing platform is fixed on the moving part of the pressurizing screw rod and is lifted under the action of the driving motor; the base is fixed on the pressurizing platform.

Compared with the prior art, the utility model discloses the following advantage is equipped with to the utensil:

(1) through setting up upper portion pressure control device, lower part pressure control device to can directly use the cutting ring of standard to take a sample, need not extrude during the experiment soil sample get into the container in, the direct mount cutting ring can, the vertical disturbance and the side disturbance that the soil sample received when having avoided moving the appearance.

(2) Adopt 3 sealing washers between barrel and the cutting ring, the cooperation transparent barrel uses, can be convenient for observe the side seal effect in the experiment, ensures that the data of penetration test is accurate reliable.

(3) During testing, different set upper and bottom osmotic pressures can be applied to the whole sample, the actual environment of the sample is simulated, and the testing error is reduced.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some examples of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without inventive work.

FIG. 1 is a schematic view of the overall structure;

FIG. 2 is a schematic diagram of the construction of the permeation vessel.

In the figure: the device comprises a force sensor 1, a fixed seat 11, a permeation container 2, a cylinder 21, a first chamber 211, a second chamber 212, an upper end cover 22, an upper exhaust plug 221, a base 23, a lower exhaust plug 231, a second channel 232, a cutting ring 24, a pressing plate 25, a first channel 251, a sealing ring 26, an upper permeable stone 27, a lower permeable stone 28, an upper pressure control device 3, a lower pressure control device 4, a consolidation pressurizing mechanism 5, a pressurization platform 51, a pressurization screw rod 52, a driving motor 53, a case 6, a stand column 7, a beam 8 and a piston rod 9.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention. In addition, all the connection relations mentioned herein do not mean that the components are directly connected, but mean that a better connection structure can be formed by adding or reducing connection accessories according to specific implementation conditions.

Referring to fig. 1-2, a consolidation permeameter includes a force sensor 1, a permeation container 2, an upper pressure control device 3, a lower pressure control device 4, and a consolidation pressurizing mechanism 5; the consolidation pressurizing mechanism 5 is fixed in the case 6; two upright posts 7 are fixed at the upper part of the case 6; the top parts of the two upright posts 7 are fixed with a cross beam 8; the force sensor 1 is fixed on the cross beam 8 through a fixing seat 11.

The consolidation pressurizing mechanism 5 comprises a pressurizing platform 51, a pressurizing screw rod 52 and a driving motor 53; the pressurizing platform 51 is fixed on a moving part of the pressurizing screw rod 52 and is lifted under the action of a driving motor 53, the driving motor 53 is positioned in the box body, the driving motor 53 realizes transmission of the pressurizing screw rod 52 through a bevel gear, and the pressurizing screw rod 52 extends out of the box body; the permeation vessel 2 is fixed to a pressurizing platform 51.

The infiltration container 2 comprises a cylinder body 21, an upper end cover 22, a base 23, a cutting ring 24 and a pressing plate 25; the upper end cover 22 covers the top of the cylinder 21, and the base 23 is fixed at the bottom of the cylinder 21; the upper end cover 22 and the base 23 are detachably connected with the cylinder 21; the cutting ring 24 and the pressing plate 25 are positioned in the cylinder 21; the inner wall of the cylinder body 21 is of a stepped hole structure with the diameter of the top larger than that of the bottom; the pressing plate 25 is positioned at the interface of the stepped hole of the cylinder 21, the transverse size of the pressing plate 25 is consistent with that of the sample, namely the diameter of the pressing plate 25 is matched with the inner diameter of the cutting ring 24; the pressing plate 25 can move back and forth along the small-diameter end of the inner wall of the cylinder 21; the sample is located inside the cutting ring 24; a permeable stone 27 is arranged between the pressure plate 25 and the sample; the end surface of the bottom of the cutting ring 24 is flush with the upper surface of the base 23; the side of the base 23, which faces the cutting ring 24, is provided with a downward concave groove, and a lower permeable stone 28 is placed in the groove.

The pressure plate 25 divides the interior of the cylinder 21 into a first chamber 211 located above the pressure plate 25 and a second chamber 212 located below the pressure plate 25; the cutting ring 24 is hermetically connected in the second chamber 212; the outer side of the cutting ring 24 is sleeved with three rings of sealing rings 26; the inner wall of the cylinder body 21 is correspondingly provided with a sealing groove for clamping three rings of sealing rings 26; the three-ring sealing ring 26 can ensure that the sealing effect between the cutting ring 24 and the inner wall of the cylinder 21 is good; in order to facilitate the visual observation of the sealing effect, the cylinder 21 is a transparent structure made of organic glass material.

The top of the pressure plate 25 is fixed with a piston rod 9, and the top of the piston rod 9 can extend out of the upper end cover 22 and is fixedly connected with the force sensor 1; the pressure plate 25 is provided with a first channel 251 penetrating through the pressure plate, and the first channel 251 is communicated with the first cavity 211 and the second cavity 212; the upper pressure control device 3 is positioned at one side of the permeation container 2; the upper pressure control device 3 is a hydraulic control device, and liquid is introduced into the first chamber 211 through the upper pressure control device 3 to be pressurized; in order to facilitate the gas discharge in the first chamber 211, an upper exhaust plug 221 for communicating the first chamber 211 with the exterior of the permeation vessel 2 is disposed on the upper end cover 22.

The base 23 is fixed on the pressurizing platform 51 and can drive the cylinder 21 to lift along the piston rod 9, and the pressing plate 25 moves up and down along the inner wall of the cylinder 21 in the lifting process; the base 23 is provided with a second channel 232 passing through itself; the second channel 232 is communicated with the lower pressure control device 4, the lower pressure control device 4 is also a hydraulic control device, and the second channel 232 extends to the end part of the lower permeable stone 28; in order to facilitate the air exhaust of the bottom of the cylinder 21, a lower exhaust block 231 is provided on the base 23 to connect the second chamber 212 and the exterior of the infiltration vessel 2, and the end of the lower exhaust block 231 also extends to the lower permeable stone 28.

The utility model discloses a working process does: when in use, the three-ring sealing ring 26 is clamped in the sealing groove on the inner wall of the cylinder 21, and the ring cutter 24 is used for taking a sample; the lower exhaust plug 231 is opened first, bottom exhaust is performed through the lower pressure control device 4, and then the lower exhaust plug 231 is closed; pushing a cutting ring 24 with a sample taken into the cylinder 21, connecting the cylinder 21 with a base 23 in a sealing manner, placing a permeable stone 27 on the sample, placing a bearing plate 25 above the permeable stone 27, and connecting an upper end cover 22 with the cylinder 21 in a sealing manner, so that the whole permeation container 2 is locked; opening the upper exhaust plug 221, filling the container with water through the upper pressure control device 3, then closing the upper exhaust valve, and adjusting the upper pressure control device 3 and the lower pressure control device 4 to apply a certain pressure to the sample; in the consolidation stage, the pressurizing screw rod 52 is driven by the driving motor 53, so that the pressurizing platform 51 drives the cylinder 21 to ascend, and the pressure plate descends relatively at the moment, thereby forming a certain extrusion on the sample, and the force sensor 1 can obtain the force required to be applied to the sample under different deformations in the process, or obtain the compression amount of the sample by calculating the movement distance of the pressurizing screw rod 52 under the condition of applying a certain pressure to the sample; in the permeation stage, the consolidation force applied to the sample is kept unchanged, then different pressures are applied to the upper part and the lower part of the sample, so that a pressure difference is generated in the sample, and the permeation coefficients of the sample under different conditions can be obtained by calculating the volume change of pressurized liquid in the pressurizing equipment.

It should be noted that, in the present invention, "upper, lower, left, right, inner and outer" are defined based on the relative position of the components in the drawings, and are only for the clarity and convenience of describing the technical solution, it should be understood that the application of the directional terms does not limit the protection scope of the present application.

Although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described in the foregoing embodiments, or some of the technical features may be substituted by equivalent substitutions, modifications and the like, all of which are within the spirit and principle of the present invention.

Claims

1. A consolidation permeameter, comprising: comprises a force sensor, a permeation container, an upper pressure control device, a lower pressure control device and a consolidation pressurizing mechanism; wherein the content of the first and second substances,

the infiltration container comprises a cylinder body, an upper end cover fixed at the top of the cylinder body, a base fixed at the bottom of the cylinder body, a cutting ring positioned in the cylinder body and used for filling a sample, and a pressing plate pressed above the sample;

the inner wall of the cylinder body is of a stepped hole structure with the diameter of the top larger than that of the bottom; the pressure plate is connected to the interface of the stepped hole of the cylinder body in a sliding manner and divides the interior of the cylinder body into a first cavity above the pressure plate and a second cavity below the pressure plate; the cutting ring is connected in the second cavity in a sealing way; a piston rod which extends out of the infiltration container and is fixedly connected with the force sensor is fixed at the top of the pressure plate; the pressing plate is provided with a first channel which penetrates through the pressing plate and can be communicated with the first cavity and the second cavity; the upper pressure control device is communicated with the first chamber; the base is fixed on the consolidation pressurizing mechanism and can drive the cylinder to lift along the piston rod; the base is provided with a second channel penetrating through the base; the second passage communicates with a lower pressure control device.

2. The consolidation permeameter of claim 1, wherein: the consolidation pressurizing mechanism is fixed in the case; the upper part of the case is fixed with an upright post; a cross beam is fixed at the top of the upright post; the force sensor is fixed on the cross beam through a fixing seat.

3. The consolidation permeameter of claim 1, wherein: an upper exhaust plug communicated with the first chamber and the outside of the infiltration container is arranged on the upper end cover; and a lower exhaust plug communicated with the second chamber and the outside of the infiltration container is arranged on the base.

4. The consolidation permeameter of claim 1, wherein: a permeable stone is arranged between the pressing plate and the sample; the end surface of the bottom of the cutting ring is flush with the upper surface of the base; the base is provided with a groove which is sunken downwards and is opposite to the side of the cutting ring, and a lower permeable stone is placed in the groove.

5. The consolidation permeameter of claim 1, wherein: the outer side of the cutting ring is sleeved with three rings of sealing rings; the inner wall of the cylinder body is correspondingly provided with a sealing groove which can clamp three rings of sealing rings.

6. The consolidation permeameter of claim 1, wherein: the barrel is a transparent structure made of organic glass materials.

7. The consolidation permeameter of claim 1, wherein: the upper pressure control device and the lower pressure control device are hydraulic control devices.

8. The consolidation permeameter of claim 1, wherein: the consolidation pressurizing mechanism comprises a pressurizing platform, a pressurizing screw rod and a driving motor; the pressurizing platform is fixed on the moving part of the pressurizing screw rod and is lifted under the action of the driving motor; the base is fixed on the pressurizing platform.