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CN-121978001-A - Triaxial-shear-instrument-based test instrument for testing bursting and piercing strength of film material

CN121978001ACN 121978001 ACN121978001 ACN 121978001ACN-121978001-A

Abstract

The invention relates to the technical field of geotechnical synthetic materials and physical property testing equipment of building membrane materials, and discloses a triaxial-shear-instrument-based testing instrument for testing bursting strength and bursting strength of membrane materials, which comprises a computer, a data acquisition instrument and a supporting seat, wherein the top of the supporting seat is fixedly connected with two lead screws, the screw rod top fixedly connected with goes up the footstock, it is provided with pressure detection subassembly to go up footstock bottom, supporting seat top sliding connection has the circular footstock of pressure, the circular footstock top of pressure is provided with the pressure cabin base, the recess is seted up to pressure cabin base bottom, pressure cabin base top fixedly connected with a plurality of disc support tubes. According to the invention, the existing triaxial shear apparatus is taken as a main body frame, and the waste triaxial pressure cabin is utilized to be transformed into the membrane material clamp, so that a laboratory does not need to spend high capital to purchase a special bursting and puncturing testing machine, the testing range of the original triaxial shear apparatus is directly expanded, and the equipment purchasing expense is effectively saved.

Inventors

  • SUN RUOHAN
  • ZHAO JIA
  • LIU RUN
  • ZHAO YANG

Assignees

  • 天津理工大学
  • 天津大学

Dates

Publication Date
20260505
Application Date
20260320

Claims (10)

  1. 1. The utility model provides a test instrument based on triaxial shear apparatus is used for testing membrane material is broken, pierces powerful, its characterized in that includes computer (1), data acquisition appearance (2) and supporting seat (29), two lead screws (10) of supporting seat (29) top fixedly connected with, lead screw (10) top fixedly connected with goes up footstock (3), it is provided with pressure detection subassembly to go up footstock (3) bottom, supporting seat (29) top sliding connection has pressure circular footstock (18), pressure circular footstock (18) top is provided with pressure cabin base (11), recess (12) have been seted up to pressure cabin base (11) bottom; The device comprises a pressure cabin base (11), a plurality of disc support barrels (17) fixedly connected to the top of the pressure cabin base (11), fixing components are arranged on the tops of the disc support barrels (17), fixing disc support rods (7) are fixedly connected to the tops of the disc support barrels (17), pressure cabin top seats (14) are arranged on the outer walls of the fixing disc support rods (7), ejector rods (13) are fixedly connected to the tops of the pressure cabin top seats (14), force application components are arranged at the bottoms of the pressure cabin top seats (14), buffering components are arranged on the outer walls of the fixing disc support rods (7), adjusting components are arranged on the tops of supporting seats (29), and driving components are arranged inside the supporting seats (29).
  2. 2. The triaxial shear apparatus-based test instrument for testing bursting and puncture strength of membrane materials according to claim 1, wherein the pressure detection assembly comprises a pressure ring (4), a pressure gauge (5) and a pressure needle (6), the top of the pressure ring (4) is fixedly connected to the outer wall of the pressure gauge (5), the top of the pressure gauge (5) is fixedly connected to the bottom of the upper top seat (3), and the top of the pressure needle (6) is fixedly connected to the bottom of the pressure gauge (5).
  3. 3. The triaxial shear apparatus-based test instrument for testing membrane bursting and bursting strength according to claim 1, wherein the fixing assembly comprises an upper fixing disc (8) and a lower fixing disc (9), the inner wall of the upper fixing disc (8) is slidably connected to the outer wall of the fixing disc support rod (7), the inner wall of the lower fixing disc (9) is slidably connected to the outer wall of the fixing disc support rod (7), the bottom of the upper fixing disc (8) is matched with the top of the lower fixing disc (9), and a plurality of fine holes are formed in the bottom of the upper fixing disc (8) and the top of the lower fixing disc (9).
  4. 4. The triaxial shear apparatus-based test apparatus for testing membrane bursting and bursting strength according to claim 1, wherein the force application assembly comprises a bursting head (27) and a bursting head (28), and the bottom of the pressure cabin top seat (14) is provided with a universal interface, and the universal interface can be connected with the bursting head (27) or the bursting head (28) according to different testing conditions.
  5. 5. The triaxial shear apparatus-based test apparatus for testing membrane bursting and puncture strength according to claim 1, wherein each buffer assembly comprises a compression nut (15) and a buffer nut (16), the inner wall of the compression nut (15) is in threaded connection with the top end of the fixed disc support rod (7), the inner wall of the buffer nut (16) is in threaded connection with the outer side of the fixed disc support rod (7), and the buffer nut (16) is located at the bottom of the pressure cabin top seat (14).
  6. 6. The triaxial shear-based test apparatus for testing membrane bursting and puncture strength according to claim 1, wherein the adjusting assembly comprises a lifting mechanism and a changing mechanism, the lifting mechanism comprises a coarse calibration compass (19) and a fine calibration compass (21), the coarse calibration compass (19) is rotatably connected to one side of the top of the supporting seat (29), and the fine calibration compass (21) is rotatably connected to one side of the adjacent coarse calibration compass (19) at the top of the supporting seat (29).
  7. 7. The triaxial shear apparatus-based test apparatus for testing membrane bursting and puncture strength according to claim 6, wherein the change mechanism comprises a conversion locking rod (20), one end of the conversion locking rod (20) is rotatably connected to the same side of the top of a supporting seat (29) and the fine adjustment calibration compass (21), a coarse adjustment direction (25) is provided on one side of the conversion locking rod (20), and a fine adjustment direction (26) is provided on the opposite side of the coarse adjustment direction (25).
  8. 8. The triaxial shear apparatus-based test instrument for testing bursting and puncture strength of membrane materials according to claim 1, wherein the driving assembly comprises a driving motor (22), a sensor (23) and a base speed matching box (24), the outer wall of the driving motor (22) is fixedly connected inside the base speed matching box (24), the output end of the driving motor (22) is connected with the bottom end of a pressure round top seat (18), the outer wall of the sensor (23) is fixedly connected inside the base speed matching box (24), and the top of the base speed matching box (24) is fixedly connected to the inner wall of a supporting seat (29).
  9. 9. The triaxial shear apparatus-based test apparatus for testing bursting and bursting strength of a film material according to claim 1, wherein the computer (1) is electrically connected with the data acquisition apparatus (2), one end of the data acquisition apparatus (2) is electrically connected with the output end of the pressure gauge (5), and the other end of the data acquisition apparatus (2) is electrically connected with the output end of the sensor (23).
  10. 10. The triaxial shear apparatus-based test apparatus for testing membrane bursting and puncture strength according to claim 1, wherein the disc supports (17) are arranged at the top of the pressure chamber base (11) in an annular array, and the top ends of the ejector rods (13) are slidably connected to the bottom of the pressure ring (4).

Description

Triaxial-shear-instrument-based test instrument for testing bursting and piercing strength of film material Technical Field The invention relates to the technical field of geosynthetic materials and building membrane physical property testing equipment, in particular to a triaxial shear apparatus-based testing instrument for testing bursting strength and puncture strength of a membrane. Background Along with the increasing wide application of geomembranes and building membranes in water conservancy seepage prevention, railway roadbeds and various membrane structure buildings, the membranes often face the action of sharp object extrusion or local concentrated load in actual working conditions, so that bursting and puncturing strength tests are carried out on the membranes according to relevant test rules, and are key links for guaranteeing engineering quality and safety. The conventional test method at present is to fix a film sample in an annular clamp, and drive a top pressing rod to move upwards at a constant speed by using a tester until the sample is destroyed. However, in actual detection work, the existing special bursting and puncture test equipment is often expensive and has relatively single function, and for most laboratories equipped with general geotechnical test equipment, purchasing such special instruments alone not only causes higher economic burden, but also makes the original triaxial shear equipment and other equipment unable to be effectively expanded and utilized when idle, resulting in resource waste. When conventional equipment or simple tools are used for testing, the clamping mechanism is rough in design, so that the sample is very easy to slide in the process of bearing high-strength jacking load, or is locally damaged due to hard contact of the clamp in the initial installation and fixing stage, and the accuracy and reproducibility of final test data are directly affected by the non-stress damage. In addition, the traditional equipment has the defects in the aspects of automatic control and safety protection mechanisms, and sharp pressure sensing and driving shutdown are difficult to realize at the moment that the membrane material reaches the ultimate strength fracture, so that the accuracy of data acquisition is limited, and the risk of damage of the equipment due to out-of-control overload is increased. Disclosure of Invention Aiming at the defects of the prior art, the invention provides a test instrument for testing the bursting strength and the bursting strength of a film material based on a triaxial shear apparatus, which solves the problems that the existing bursting and bursting test equipment is high in acquisition cost and low in resource utilization rate, and a sample is easy to slip or damage in the clamping and testing processes to cause data distortion and the equipment lacks a safety protection mechanism and automatic accurate control capability. The triaxial shear force tester comprises a computer, a data acquisition instrument and a supporting seat, wherein the top of the supporting seat is fixedly connected with two lead screws, the top end of each lead screw is fixedly connected with an upper footstock, the bottom of each upper footstock is provided with a pressure detection assembly, the top of each supporting seat is slidably connected with a pressure round footstock, the top of each pressure round footstock is provided with a pressure cabin base, and the bottom of each pressure cabin base is provided with a groove; The pressure cabin base top fixedly connected with a plurality of disc support barrels, disc support barrel top is provided with fixed subassembly, every equal fixedly connected with in disc support barrel top is fixed disc branch, fixed disc branch outer wall is provided with the pressure cabin footstock, pressure cabin footstock top fixedly connected with ejector pin, pressure cabin footstock bottom is provided with the application of force subassembly, every fixed disc branch outer wall all is provided with buffer assembly, the supporting seat top is provided with adjusting part, the inside drive assembly that is provided with of supporting seat. Preferably, the pressure detection assembly comprises a pressure ring, a pressure gauge and a pressure needle, wherein the top of the pressure ring is fixedly connected to the outer wall of the pressure gauge, the top of the pressure gauge is fixedly connected to the bottom of the upper top seat, and the top of the pressure needle is fixedly connected to the bottom of the pressure gauge. Preferably, the fixed subassembly includes fixed disc and lower fixed disc, fixed disc inner wall sliding connection is at fixed disc branch outer wall down, fixed disc bottom sliding connection is at fixed disc top down on. Preferably, the force application assembly comprises a piercing head and a bursting head, a universal interface is arranged at the bottom of the pressure cabin roof seat, and the universal interfac