CN215640580U

CN215640580U - Extensometer for detecting elongation of geotextile

Info

Publication number: CN215640580U
Application number: CN202121995566.4U
Authority: CN
Inventors: 于飞; 孙天磊; 姜源; 丁淑霞
Original assignee: Jinan Huarui Railway Machinery Manufacturing Co ltd
Current assignee: Jinan Huarui Railway Machinery Manufacturing Co ltd
Priority date: 2021-08-24
Filing date: 2021-08-24
Publication date: 2022-01-25
Anticipated expiration: 2031-08-24

Abstract

The extensometer for detecting the elongation of the geotextile is used for conveniently detecting the elongation of the geotextile material. It is including connecting handle, splint, clamping bolt and preforming, and wherein the first end of connecting handle is connected with the universal material testing machine of electron, the second end and the splint fixed connection of connecting handle, the preforming be the ring shape structure and the preforming both ends and the splint between the activity set up and contact, is equipped with the briquetting at the preforming arc top, is equipped with clamping bolt between splint and preforming, and rotatory clamping bolt makes the briquetting mating reaction on preforming and the splint compress tightly geotechnological cloth. The extensometer for detecting the elongation of the geotextile, provided by the utility model, has the advantages of simple structure and convenience in use, and the extensometer is used for detecting the elongation of the geotextile and has high measurement precision.

Description

Extensometer for detecting elongation of geotextile

Technical Field

The utility model relates to the technical field of elongation detection of geotechnical materials, in particular to an extensometer for elongation detection of geotechnical cloth.

Background

The geosynthetic wide strip tensile test method, GB/T15788-. The two marked points are located on the symmetry axis of the specimen parallel to the applied load, spaced 60mm apart (30 mm on each side of the center of symmetry of the specimen). The detection tool adopted by the national large laboratory is a non-contact laser extensometer or a video extensometer, the price is high, the domestic requirement is hundreds of thousands, the imported hundreds of thousands to millions are different, and the test detection cost is increased.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a contact-type low-cost extensometer for detecting the elongation of geotextile, which is used for conveniently detecting the elongation of geotextile materials.

The technical scheme adopted by the utility model for solving the technical problems is as follows: the extensometer for detecting the elongation of the geotextile is characterized by comprising a connecting handle, a clamping plate, a clamping bolt and a pressing plate, wherein the first end of the connecting handle is connected with an electronic universal material testing machine, the second end of the connecting handle is fixedly connected with the clamping plate, the pressing plate is of a circular ring-shaped structure, the two ends of the pressing plate are movably arranged between the clamping plate and the pressing plate and is in contact with the clamping plate, a pressing block is arranged on the arc top of the pressing plate, the clamping bolt is arranged between the clamping plate and the pressing plate, and the pressing plate and the clamping plate are tightly pressed by the aid of the rotary clamping bolt.

Furthermore, the clamp plate comprises a movable jaw and a fixed jaw, both the movable jaw and the fixed jaw are rectangular rods, a positioning bolt is arranged between the corresponding ends of the movable jaw and the fixed jaw, the pressing sheet is arranged between the fixed jaw and the movable jaw, the positioning bolt penetrates through a gap at the end of the pressing sheet, and the arc top of the pressing sheet faces the fixed jaw; the clamping bolt is arranged on the movable jaw.

Furthermore, an adjusting hole is formed in the middle of the movable jaw, and a clamping bolt is arranged in the adjusting hole.

Further, the surface of the briquette has no edges and corners.

Furthermore, the clamping plate is of a frame structure, the pressing sheet is arranged on the inner side of the clamping plate, and two ends of the pressing sheet are connected with the clamping plate in a sliding mode.

Furthermore, the front wall of the clamping plate is fixedly connected with the connecting handle, the rear wall of the clamping plate is provided with a long groove, and the end part of the pressing sheet is arranged in the long groove.

Further, the splint are made of aluminum alloy, and the pressing sheets are elastic steel sheets.

Furthermore, a protrusion is arranged at the tail end of the pressing sheet, the width of the protrusion is larger than that of the pressing sheet, an insertion hole is formed in the rear wall of the clamping plate, and the protrusion penetrates through the insertion hole and then extends into the long groove.

The utility model has the beneficial effects that: the extensometer for detecting the elongation of the geotextile, provided by the utility model, has the advantages of simple structure and convenience in use, and the extensometer is used for detecting the elongation of the geotextile and has high measurement precision.

Drawings

FIG. 1 is a front view of a first embodiment of the present invention;

FIG. 2 is a front view of the movable jaw;

FIG. 3 is a front view of the preform;

FIG. 4 is a schematic diagram illustrating a usage status according to an embodiment of the present invention;

FIG. 5 is a second schematic view illustrating a usage status of the present invention;

FIG. 6 is an enlarged view of a portion of FIG. 4 at A;

FIG. 7 is a schematic view of a second embodiment of the present invention;

FIG. 8 is one of the cross-sectional views of the splint;

FIG. 9 is a front view of the spring plate;

FIG. 10 is a second cross-sectional view of the splint;

in the figure: the device comprises a connecting handle 1, a threaded hole 11, a fixed jaw 2, a movable jaw 3, an adjusting hole 31, a mounting hole 32, a pressing sheet 4, a pressing block 41, a gap 42, a bulge 43, a clamping bolt 5, geotextile 6, a clamping plate 7, an elongated slot 71, a jack 72 and a positioning bolt 8.

Detailed Description

As shown in fig. 1 to 10, the present invention mainly comprises a stem 1, a clamping plate, a pressing plate 4 and a clamping bolt 5, and will be described in detail with reference to the accompanying drawings.

As shown in fig. 1 to 6, in the first embodiment of the present invention, the connection handle 1 is an aluminum alloy metal rod, a threaded hole 11 is formed at the first end of the connection handle, the connection of the connection handle and the electronic universal material testing machine is realized through the threaded hole, and at this time, a bolt assembly is inserted into the threaded hole.

As shown in fig. 1, the clamping plate comprises a fixed jaw 2 and a movable jaw 3, both the fixed jaw and the movable jaw are rectangular rods made of aluminum alloy, as shown in fig. 2, an adjusting hole 31 is arranged in the middle of the movable jaw, and mounting holes 32 are respectively arranged at both ends of the movable jaw. And positioning bolts 8 are respectively arranged between the left end of the fixed jaw and the left end of the movable jaw and between the right end of the fixed jaw and the right end of the movable jaw, and the positioning bolts penetrate through the mounting holes. The positioning bolt is provided with a nut, and the fixed jaw and the movable jaw are arranged between the nut and a nut of the positioning bolt. At this time, the movable jaw can move relative to the fixed jaw.

A pressing sheet 4 is arranged between the fixed jaw and the movable jaw, as shown in figure 3, the pressing sheet is an arc-shaped elastic steel sheet, the cross section of the pressing sheet is rectangular, as shown in figure 6, a pressing block 41 is arranged at the arc top of the pressing sheet, a pressing block is also arranged on the fixed jaw, the surface of the pressing block has no edge angle, and the two pressing blocks are matched to clamp the geotextile. The two ends of the pressing sheet are respectively provided with a strip-shaped notch 42, during installation, the pressing sheet is arranged between the fixed jaw and the movable jaw, a screw rod of the positioning bolt penetrates through the notch, the pressing sheet is limited between the fixed jaw and the movable jaw at the moment, a clamping bolt 5 is arranged in the adjusting hole, and the position of the clamping bolt in the adjusting hole is adjustable so as to position a symmetry axis of a sample (geotextile). By rotating the clamping bolt, the distance between the clamping bolt and the pressing sheet can be adjusted. As shown in fig. 4 and 5, when the device is used, the geotextile passes through a gap between the pressure head and the movable jaw, after the two ends of the geotextile are clamped tightly, the geotextile can be extended when the geotextile is pulled to the upper side and the lower side under the action of the traction mechanism, and at the moment, the extensometer can synchronously move along with the clamping point of the geotextile through the matching action of the clamping bolt, the pressing sheet and the fixed jaw. And uploading the data of the movement of the extensometer to a control system of the electronic universal material testing machine, and further calculating the elongation of the geotextile through a built-in algorithm of the control system.

In the first embodiment, the fixed jaw and the movable jaw are movably arranged, the pressing sheet is arranged between the fixed jaw and the movable jaw, and the geotechnical cloth is clamped through the blades and the fixed jaw. After the clamping bolt is unscrewed, the pressing sheet can reset under the action of the elasticity of the pressing sheet.

As shown in fig. 7 to 10, a second embodiment of the present invention is different from the first embodiment in the structure of the splint. In the second embodiment, the clamp plate has a frame-shaped structure formed by four aluminum alloy plates. The pressing sheet is arranged on the inner side of the clamping plate, as shown in fig. 10, two ends of the rear wall of the clamping plate are respectively provided with a long groove 71, each long groove is of a rectangular structure, the middle part of the rear wall of the clamping plate is provided with an adjusting hole 31, the end part of each long groove close to the adjusting hole is provided with an insertion hole 72, the width of each insertion hole is larger than that of each long groove, and each insertion hole is a blind hole. As shown in fig. 9, the pressing sheet is an elastic steel sheet and has a circular arc structure with a rectangular cross section. Protrusions 43 are provided at both ends of the pressing sheet, and the width of the protrusions is greater than that of the pressing sheet. When the clamp is used, the bulge penetrates through the jack and then extends into the long groove, and a pair of gaps are formed between the pressing sheet and the front wall of the clamping plate and used for placing geotextile. After the clamping bolt 5 is installed in the adjusting hole, the geotextile can be clamped through the cooperation of the clamping bolt, the pressing sheet and the clamping plate. And at the moment, the bending degree of the pressing sheet is increased, and the bulges at the two ends of the pressing sheet move in the long grooves.

Compared with the first embodiment, the clamping plate in the second embodiment is simpler in structure, and a positioning bolt is omitted.

The utility model has simple structure and convenient use, and the extensometer of the utility model is used for detecting the elongation of the geotextile with high measurement precision.

Claims

1. The extensometer for detecting the elongation of the geotextile is characterized by comprising a connecting handle, a clamping plate, a clamping bolt and a pressing plate, wherein the first end of the connecting handle is connected with an electronic universal material testing machine, the second end of the connecting handle is fixedly connected with the clamping plate, the pressing plate is of a circular ring-shaped structure, the two ends of the pressing plate are movably arranged between the clamping plate and the pressing plate and is in contact with the clamping plate, a pressing block is arranged on the arc top of the pressing plate, the clamping bolt is arranged between the clamping plate and the pressing plate, and the pressing plate and the clamping plate are tightly pressed by the aid of the rotary clamping bolt.

2. The extensometer for detecting elongation of geotextile according to claim 1, wherein the clamping plate comprises a movable jaw and a fixed jaw, both of which are rectangular rods, a positioning bolt is arranged between the corresponding ends of the movable jaw and the fixed jaw, the sheeting is arranged between the fixed jaw and the movable jaw, the positioning bolt passes through a gap at the end of the sheeting, and the arc top of the sheeting faces the fixed jaw; the clamping bolt is arranged on the movable jaw.

3. The extensometer for detecting elongation of geotextile as claimed in claim 2, wherein an adjusting hole is provided in the middle of the movable jaw, and the clamping bolt is provided in the adjusting hole.

4. The extensometer for detecting elongation of geotextile according to claim 1, wherein the surface of the briquette has no corner.

5. The extensometer for detecting elongation of geotextile according to claim 1, wherein the clamping plate has a frame-shaped structure, the pressing sheet is placed inside the clamping plate, and both ends of the pressing sheet are slidably connected with the clamping plate.

6. The extensometer for detecting elongation of geotextile as claimed in claim 5, wherein the front wall of the clamping plate is fixedly connected with the connecting handle, the rear wall of the clamping plate is provided with a long groove, and the end part of the pressing sheet is arranged in the long groove.

7. The extensometer for detecting elongation of geotextile according to claim 1, wherein the clamping plate is made of aluminum alloy, and the pressing plate is made of elastic steel sheet.

8. The extensometer for detecting elongation of geotextile according to claim 6, wherein a protrusion having a width larger than that of the press sheet is provided at the end of the press sheet, and an insertion hole is provided in the rear wall of the clamping plate, and the protrusion passes through the insertion hole and then extends into the elongated slot.