CN215727269U

CN215727269U - Displacement sensor fixing device based on circular test piece

Info

Publication number: CN215727269U
Application number: CN202122182616.3U
Authority: CN
Inventors: 王冶; 张俊; 汪守信
Original assignee: Northeastern University China
Current assignee: Northeastern University China
Priority date: 2021-09-08
Filing date: 2021-09-08
Publication date: 2022-02-01
Anticipated expiration: 2031-09-08

Abstract

The utility model discloses a displacement sensor fixing device based on a circular test piece, which relates to the technical field of road engineering and comprises a disc, a long fixing plate, a short partition plate, a test piece chassis, a sensor clamp and a connecting plate, the interior of the long fixed plate is connected with a loading rod through a thread, the outer side of the long fixed plate is movably connected with a second connecting rod, one end of the second connecting rod is in threaded connection with the connecting plate, the second connecting rod penetrates through the short partition plate, a limit spring is arranged on one side of the short partition plate and positioned on the outer side of the second connecting rod, the limit spring is fixedly connected with the connecting plate, the utility model has the advantages that the preparation of the test is greatly improved, the operation of testing personnel is convenient, the test efficiency is improved, and the utility model has obvious significance for improving the accuracy of the dynamic triaxial test result.

Description

Displacement sensor fixing device based on circular test piece

Technical Field

The utility model relates to the technical field of road engineering, in particular to a displacement sensor fixing device based on a circular test piece.

Background

The dynamic triaxial test is commonly used for carrying out dynamic load tests on soil bodies and rocks, is also suitable for asphalt mixture test pieces in road engineering, and can be used for researching the mechanical property, constitutive relation and failure mechanism of the asphalt mixture test pieces through a uniaxial static load test and a dynamic test.

But when our deformation requirement to the bituminous mixture test piece was about 0.01mm, current sensor fixing device can not satisfy our actual experimental needs, and its accuracy is relatively poor to the error of the experiment that increases, and the connected mode of sensor is complicated, and installation and dismantlement process are loaded down with trivial details, thereby has reduced work efficiency.

SUMMERY OF THE UTILITY MODEL

Aiming at the defects of the prior art, the utility model provides a displacement sensor fixing device based on a circular test piece, and solves the problems of poor accuracy and complicated installation and disassembly processes of a sensor in the background technology.

In order to achieve the purpose, the utility model is realized by the following technical scheme: the utility model provides a displacement sensor fixing device based on circular test piece, includes disc, long fixed plate, short baffle, test piece chassis, sensor anchor clamps and connecting plate, the inside threaded connection of long fixed plate has the loading pole, the outside swing joint of long fixed plate has the second connecting rod, the one end and the connecting plate threaded connection of second connecting rod, the second connecting rod runs through in short baffle, the outside that one side of short baffle is located the second connecting rod is provided with spacing spring, spacing spring and connecting plate fixed connection, the bottom of disc is provided with the hexagon socket head cap screw, long fixed plate passes through hexagon socket head cap screw and disc fixed connection.

Preferably, the connecting plate includes rectangle piece down, goes up rectangle piece, second hexagon socket screw, web and third hexagon socket screw, the outside of web is provided with rectangle piece and lower rectangle piece, the equal threaded connection in the outside of going up rectangle piece and lower rectangle piece has second hexagon socket screw and third hexagon socket screw.

Preferably, the test piece chassis is fixedly connected with the disc through an inner hexagonal screw.

Preferably, the sensor fixture comprises a first connecting rod, a first inner hexagonal screw, a limiting fixture, an adjusting rod and a sticky nail, a plurality of through holes are formed in the limiting fixture, the first connecting rod penetrates through one of the through holes, and the sticky nail is arranged on one side of the limiting fixture.

Preferably, the outer side surface of the limiting clamp is in threaded connection with a first inner hexagonal screw, and the adjusting rod penetrates through the other through hole.

Preferably, the disc (6), the test piece chassis (7), the limiting spring (8), the short partition plate (9), the long fixing plate (10), the second connecting rod (11), the loading rod (12), the lower rectangular sheet (13), the upper rectangular sheet (14), the second inner hexagonal screw (15) and the connecting plate (19) are all made of 304 stainless steel materials.

Preferably, the sensor clamp (17) is made of aluminum.

The utility model provides a displacement sensor fixing device based on a circular test piece, which has the following beneficial effects:

1. this displacement sensor fixing device based on circular test piece is located the center of two second connecting rods through the loading pole that sets up, and when the loading pole precession distance, two upper and lower second connecting rods can the same distance of the propulsion of steady level under spacing spring action, have improved experimental preparedness greatly, the experimenter's of being convenient for operation to according to

Therefore, the device can enable the L and the Delta L to be more accurate, and has obvious significance for improving the accuracy of the dynamic triaxial test result.

2. This displacement sensor fixing device based on circular test piece, through mutually supporting of the sensor anchor clamps that set up and connecting plate, the rectangle piece is fixed connecting plate and sensor anchor clamps through second hexagon socket head cap screw and third hexagon socket head cap screw from top to bottom, and convenient operation improves experimental efficiency.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic view of a sensor fixture of the present invention;

FIG. 3 is a schematic view of a web of the present invention;

FIG. 4 is a schematic front view of the present invention;

FIG. 5 is a side schematic view of the present invention;

fig. 6 is a top view of the present invention.

In the figure: 1. a first connecting rod; 2. a first hexagonal socket head cap screw; 3. limiting the clamp; 4. adjusting a rod; 5. sticking nails; 6. a disc; 7. a test piece chassis; 8. a limiting spring; 9. a short partition plate; 10. a long fixing plate; 11. a second connecting rod; 12. a loading rod; 13. a lower rectangular sheet; 14. an upper rectangular sheet; 15. a second hexagonal socket head cap screw; 16. a third hexagon socket head cap screw; 17. a sensor fixture; 19. a connecting plate; 20. a web.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.

Referring to fig. 1 to 6, the present invention provides a technical solution: a displacement sensor fixing device based on a circular test piece comprises a disc 6, a long fixing plate 10, a short partition plate 9, a test piece chassis 7, a sensor clamp 17 and a connecting plate 19, wherein a loading rod 12 is connected to the inner portion of the long fixing plate 10 in a threaded manner, a second connecting rod 11 is movably connected to the outer side of the long fixing plate 10, one end of the second connecting rod 11 is connected with the connecting plate 19 in a threaded manner, the second connecting rod 11 penetrates through the short partition plate 9, a limiting spring 8 is arranged on one side of the short partition plate 9 and located on the outer side of the second connecting rod 11, the limiting spring 8 is fixedly connected with the connecting plate 19, the loading rod 12 is located in the centers of the two second connecting rods 11, when the loading rod 12 is screwed in a distance, the upper second connecting rod 11 and the lower second connecting rod 11 can stably and horizontally push the same distance under the action of the limiting spring 8, test readiness is greatly improved, operation of a tester is facilitated, and the connecting plate 19 comprises a lower rectangular sheet 13, Go up rectangular sheet 14, second hexagon socket head cap screw 15, web 20 and third hexagon socket head cap screw 16, the outside of web 20 is provided with rectangular sheet 14 and lower rectangular sheet 13, upper and lower rectangular sheet carries out fixed connection through hexagon socket head cap screw and web 20, the operating personnel of being convenient for operate, and it is convenient to dismantle, the equal threaded connection in the outside of going up rectangular sheet 14 and lower rectangular sheet 13 has second hexagon socket head cap screw 15 and third hexagon socket head cap screw 16, fix through using second hexagon socket head cap screw 15 and third hexagon socket head cap screw 16 and compare more convenient in traditional bolted connection operation, improve operator's experimental convenience, the bottom of disc 6 is provided with the hexagon socket head cap screw, long fixed plate 10 has reached the effect of being convenient for dismantle through hexagon socket head cap screw and disc 6 fixed connection, test piece chassis 7 is through hexagon socket head cap screw and disc 6 fixed connection, sensor anchor clamps 17 include head rod 1, The first inner hexagonal screw 2, the limiting clamp 3, the adjusting rod 4 and the sticky nail 5, the sensor clamp 17 is made of aluminum, a plurality of through holes are formed in the limiting clamp 3, the limiting clamp 3 is guaranteed to be parallel to a test piece in the vertical direction through the first connecting rod 1 when the sensor is installed, the error problem possibly existing in a test is solved, the first connecting rod 1 penetrates through one through hole, the sticky nail 5 is arranged on one side of the limiting clamp 3, the traditional sticky nail 5 is a regular prism and is adhered to a test piece chassis 7, gaps exist on the surface, the sticky nail 5 solves the problem of the gap between the common sticky nail 5 and the surface of the test piece, the adhesion effect is better, the error of the test is favorably reduced, the first inner hexagonal screw 2 is in threaded connection with the outer side surface of the limiting clamp 3, the adjusting rod 4 penetrates through the other through hole, and due to the high sensing precision, compared with a direct adjustment sensor, the effect of the sensor is better through the rotation adjusting rod 4, and the disc 6, the test piece chassis 7, the limiting spring 8, the short partition plate 9, the long fixing plate 10, the second connecting rod 11, the loading rod 12, the lower rectangular sheet 13, the upper rectangular sheet 14, the second inner hexagonal screw 15 and the connecting plate 19 are all made of 304 stainless steel materials.

In summary, in the displacement sensor fixing device based on the circular test piece, when in use, the loading rod 12 is screwed to apply a forward load to the short partition plate 9, the limit spring 8 also generates a forward acting force due to the fixing action of the long fixing plate 10, the connecting plate 19 and the sensor clamp 17 are fixed through the second inner hexagonal screw 15 and the third inner hexagonal screw 16 to push the sensor clamp 17 to move forward, and the two second connecting rods 11 can stably and horizontally push the same distance under the action of the limit spring 8 And (4) accuracy.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and equivalent alternatives or modifications according to the technical solution of the present invention and the inventive concept thereof should be covered by the scope of the present invention.

Claims

1. The utility model provides a displacement sensor fixing device based on circular test piece, includes disc (6), long fixed plate (10), short baffle (9), test piece chassis (7), sensor anchor clamps (17) and connecting plate (19), its characterized in that: long fixed plate (10) internal thread is connected with loading rod (12), the outside swing joint of long fixed plate (10) has second connecting rod (11), the one end and connecting plate (19) threaded connection of second connecting rod (11), second connecting rod (11) run through in short baffle (9), the outside that one side of short baffle (9) is located second connecting rod (11) is provided with spacing spring (8), spacing spring (8) and connecting plate (19) fixed connection, the bottom of disc (6) is provided with the hexagon socket head cap screw, long fixed plate (10) are through hexagon socket head cap screw and disc (6) fixed connection.

2. The displacement sensor fixing device based on the circular test piece as claimed in claim 1, wherein: the connecting plate (19) comprises a lower rectangular sheet (13), an upper rectangular sheet (14), a second inner hexagonal screw (15), a web (20) and a third inner hexagonal screw (16), the outer side of the web (20) is provided with the upper rectangular sheet (14) and the lower rectangular sheet (13), and the outer sides of the upper rectangular sheet (14) and the lower rectangular sheet (13) are connected with the second inner hexagonal screw (15) and the third inner hexagonal screw (16) in a threaded manner.

3. The displacement sensor fixing device based on the circular test piece as claimed in claim 1, wherein: the test piece chassis (7) is fixedly connected with the disc (6) through an inner hexagonal screw.

4. The displacement sensor fixing device based on the circular test piece as claimed in claim 1, wherein: sensor anchor clamps (17) include head rod (1), first hexagon socket head cap screw (2), spacing anchor clamps (3), adjust pole (4) and glue nail (5), the inside of spacing anchor clamps (3) is provided with a plurality of perforating holes, head rod (1) runs through in one of them perforating hole, one side of spacing anchor clamps (3) is provided with glues nail (5).

5. The round specimen-based displacement sensor fixing device of claim 4, wherein: the outer side surface of the limiting clamp (3) is in threaded connection with a first inner hexagonal screw (2), and the adjusting rod (4) penetrates through the other through hole.

6. The displacement sensor fixing device based on the circular test piece as claimed in claim 1, wherein: the disc (6), the test piece chassis (7), the limiting spring (8), the short partition plate (9), the long fixing plate (10), the second connecting rod (11), the loading rod (12), the lower rectangular sheet (13), the upper rectangular sheet (14), the second inner hexagonal screw (15) and the connecting plate (19) are all made of 304 stainless steel materials.

7. The displacement sensor fixing device based on the circular test piece as claimed in claim 1, wherein: the sensor clamp (17) is made of aluminum material.