CN213813180U - Improved triaxial apparatus piston rod - Google Patents
Improved triaxial apparatus piston rod Download PDFInfo
- Publication number
- CN213813180U CN213813180U CN202022861940.3U CN202022861940U CN213813180U CN 213813180 U CN213813180 U CN 213813180U CN 202022861940 U CN202022861940 U CN 202022861940U CN 213813180 U CN213813180 U CN 213813180U
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- piston rod
- elastomer
- triaxial apparatus
- lead
- foil gage
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Abstract
The utility model provides an improved generation triaxial apparatus piston rod, including piston rod body, elastomer and top, the top is installed to piston rod body bottom, install the elastomer on the top, be equipped with the intermediate hole in the elastomer, install the foil gage lead wire in the intermediate hole, two foil gage formula foil gauges are installed to the elastomer outside, foil gage lead wire one end is passed the elastomer and is installed on the foil gage; the utility model discloses a flexible seal pipe, including elastomer outer lane, flexible seal pipe, piston rod spacing ring, flexible seal pipe installs last gland nut in the top, gland nut is installed down to flexible seal pipe bottom, the piston rod is installed in the pressure chamber, just the piston rod spacing ring is installed on the piston rod top, the utility model discloses simple structure, it is with low costs, can eliminate the measuring error that the friction caused, it is comparatively practical.
Description
Technical Field
The utility model belongs to the technical field of the triaxial apparatus, concretely relates to improved generation triaxial apparatus piston rod.
Background
In the geotechnical test, a triaxial testing machine for measuring the isoparametric parameters of the strength and the deformation of soil is widely applied, when the pressure of the soil with certain strength is measured, the friction force of a piston rod on a pressure chamber becomes a non-negligible interference factor, and the installation condition of the friction force changes along with the use environment and cannot be eliminated through calculation.
In the prior art, the friction force of the piston rod can cause errors of measurement results, so that a triaxial apparatus which can meet requirements to a certain extent and can eliminate measurement errors caused by friction is needed to be designed.
SUMMERY OF THE UTILITY MODEL
The utility model aims at solving the problems existing in the prior art, the utility model provides an improved triaxial apparatus piston rod.
The utility model provides a following technical scheme:
the utility model provides an improved generation triaxial apparatus piston rod, includes piston rod body, elastomer and top, the top is installed to piston rod body bottom, install the elastomer on the top, be equipped with well in the middle of the elastomer, install the foil gage lead wire in the well, two foil gage formula foil gages are installed in the elastomer outside, foil gage lead wire one end is passed the elastomer and is installed on foil gage.
Further, flexible sealing tube is installed to the elastomer outer lane, gland nut is installed on flexible sealing tube top, gland nut is installed down to flexible sealing tube bottom.
Further, the outer wall of the elastic body is provided with threads.
Further, a lead sealing nut is installed at the top end of the elastic body.
Furthermore, one side of the piston rod body is provided with a lead-out hole, and the other end of the strain gauge lead is led out from the lead-out hole.
Further, the piston rod body is installed in the pressure chamber, just the piston rod spacing ring is installed on the piston rod body top.
The utility model has the advantages that: the influence of the friction force of the piston rod on the measurement of the pressure of the sample is eliminated; the pressure chamber is improved on the basis of the original pressure chamber, and the size of the pressure chamber is not required to be changed; low cost and easy popularization.
Drawings
The accompanying drawings are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention, and together with the description serve to explain the invention and not to limit the invention. In the drawings:
fig. 1 is a schematic front view of the present invention;
fig. 2 is a schematic view of the pressure chamber of the present invention.
Labeled as: 1. ejecting the head; 2. an elastomer; 21. a middle hole; 22. a thread; 3. a metal foil type strain gauge; 4. a flexible sealing tube; 5. a strain gauge lead; 6. a lead seal nut; 7. an upper seal nut; 8. a lower seal nut; 9. a piston rod body; 91. an exit aperture; 10. a piston rod limit ring; 11. a pressure chamber; 12. a pressure transmitting plate; 13. and (4) a groove.
Detailed Description
As shown in fig. 1 and 2, an improved triaxial apparatus piston rod comprises a piston rod body 9, an elastic body 2 and a top 1, wherein the top 1 is installed at the bottom end of the piston rod body 9, the elastic body 2 is installed on the top 1, a middle hole 21 is formed in the elastic body 2, a strain gauge lead 5 is installed in the middle hole 21, two metal foil type strain gauges 3 are installed on the outer sides of the elastic body 2, and one ends of the strain gauge leads 5 penetrate through the elastic body 2 and are installed on the metal foil type strain gauges 3; a flexible sealing pipe 4 is arranged on the outer ring of the elastic body 2, an upper sealing nut 7 is arranged at the top end of the flexible sealing pipe 4, and a lower sealing nut 8 is arranged at the bottom end of the flexible sealing pipe 4; the outer wall of the elastic body 2 is provided with threads 22, and the top end of the elastic body 2 is provided with a lead sealing nut 6; a leading-out hole 91 is formed in one side of the piston rod body 9, the other end of the strain gauge lead wire 5 is led out from the leading-out hole 91, the piston rod body 9 is installed in the pressure chamber 11, and a piston rod limiting ring 10 is installed at the top end of the piston rod body 9.
As shown in fig. 1, two metal foil type strain gauges 3 are mounted on the outer wall of an elastic body 2, a strain gauge lead 5 penetrates through a middle hole 21 on the elastic body 2, one end of the strain gauge lead 5 penetrates through the elastic body 2 and is mounted on the metal foil type strain gauge 3, the other end of the strain gauge lead 5 penetrates through a leading-out hole 91 on a piston rod body 9, the metal foil type strain gauge 3 is used for measuring stress, a measured object is deformed under the action of external force, the metal foil type strain gauge 3 is deformed along with the deformation, and the resistance value of the metal foil type strain gauge 3 is changed, so that the stress value is measured; the flexible sealing pipe 4 is arranged on the outer ring of the elastic body 2, the outer ring of the elastic body 2 is provided with threads 22, the upper sealing nut 7 is matched with the threads 22 to ensure the sealing performance of the top end of the flexible sealing pipe 4, the lower sealing nut 8 is matched with the threads 22 to ensure the sealing performance of the bottom end of the flexible sealing pipe 4, and the flexible sealing pipe 4 is filled with an insulating buffer solution, so that the buffer solution in the flexible sealing pipe 4 cannot overflow through the upper sealing nut 7 and the lower sealing nut 8; because the strain gauge lead 5 is arranged in the middle hole 21, the lead sealing nut 6 is arranged at the top end of the elastic body 2, and therefore the sealing performance in the elastic body 2 is guaranteed.
Examples
When the utility model is used, the piston rod body 9 is arranged in the pressure chamber 11, the pressure transmitting plate 12 is arranged in the pressure chamber 11, the groove 121 is arranged on the pressure transmitting plate 12, the top 1 is arranged right above the groove 121, the bottom end of the top 1 is arc-shaped, which is convenient for fully contacting with the pressure transmitting plate 12, the stability of pressure measurement is ensured, the elastomer 2 is arranged on the top 1, the elastomer 2 is arranged in the piston rod body 9, the deformation force of the elastic body 2 is measured through the metal foil type strain gauge 3 arranged on the outer wall of the elastic body 2, the elastic body 2 deforms, at the moment, the metal foil type strain gauge 3 also deforms, therefore, pressure is measured according to the deformation force of the metal foil type strain gauge 3, the pressure is directly measured in the pressure chamber 11, force does not need to be transmitted through the piston rod body 9, measuring errors caused by friction of the piston rod body 9 are avoided, and the accuracy of a measuring result is improved.
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 equivalents may be substituted for elements thereof. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (6)
1. The utility model provides an improved generation triaxial apparatus piston rod, includes piston rod body (9), elastomer (2) and top (1), its characterized in that, top (1) is installed to piston rod body (9) bottom, install elastomer (2) on top (1), be equipped with intermediate hole (21) in elastomer (2), install foil gage lead wire (5) in intermediate hole (21), two metal foil formula foil gage (3) are installed in elastomer (2) outside, foil gage lead wire (5) one end is passed elastomer (2) and is installed on metal foil formula foil gage (3).
2. The improved triaxial apparatus piston rod according to claim 1, wherein the flexible sealing tube (4) is installed on the outer ring of the elastic body (2), the upper sealing nut (7) is installed on the top end of the flexible sealing tube (4), and the lower sealing nut (8) is installed on the bottom end of the flexible sealing tube (4).
3. Improved triaxial apparatus piston rod according to claim 1, wherein the outer wall of the elastomer body (2) is provided with a thread (22).
4. Improved triaxial apparatus piston rod according to claim 1, wherein the elastomer body (2) is surmounted by a lead sealing nut (6).
5. The improved triaxial apparatus piston rod of claim 1, wherein a lead-out hole (91) is formed on one side of the piston rod body (9), and the other end of the strain gauge lead (5) is led out from the lead-out hole (91).
6. Improved triaxial apparatus piston rod according to claim 1, wherein the piston rod body (9) is mounted in a pressure chamber (11), and a piston rod limiting ring (10) is mounted at the top end of the piston rod body (9).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022861940.3U CN213813180U (en) | 2020-12-02 | 2020-12-02 | Improved triaxial apparatus piston rod |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022861940.3U CN213813180U (en) | 2020-12-02 | 2020-12-02 | Improved triaxial apparatus piston rod |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213813180U true CN213813180U (en) | 2021-07-27 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022861940.3U Active CN213813180U (en) | 2020-12-02 | 2020-12-02 | Improved triaxial apparatus piston rod |
Country Status (1)
| Country | Link |
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| CN (1) | CN213813180U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114112769A (en) * | 2021-11-24 | 2022-03-01 | 中国水利水电科学研究院 | Triaxial tester pressure chamber piston friction force calibration method and device |
-
2020
- 2020-12-02 CN CN202022861940.3U patent/CN213813180U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114112769A (en) * | 2021-11-24 | 2022-03-01 | 中国水利水电科学研究院 | Triaxial tester pressure chamber piston friction force calibration method and device |
| CN114112769B (en) * | 2021-11-24 | 2022-07-22 | 中国水利水电科学研究院 | Triaxial tester pressure chamber piston friction force calibration method and device |
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