CN106989859B

CN106989859B - A Pressure Cell for Physical Simulation Experiments of Similar Materials

Info

Publication number: CN106989859B
Application number: CN201710328290.6A
Authority: CN
Inventors: 程素君; 姚恺; 郭书哲; 张珍; 诸信川
Original assignee: Xinxiang University
Current assignee: Xinxiang University
Priority date: 2017-05-11
Filing date: 2017-05-11
Publication date: 2019-05-10
Anticipated expiration: 2037-05-11
Also published as: CN106989859A

Abstract

The invention discloses a kind of pressure cells of simulation test with similar mat-erial in engineering foundation construction technique field experiment, including device housing, the inner cavity top of described device shell is horizontally arranged with upper backup pad, three groups of through-holes are offered on the upper backup pad, and longitudinal direction is plugged with pressure conduction bar in three groups of through-holes, pressure-sensitive diaphragm is connected at the top of the pressure conduction bar, the bottom of the pressure-sensitive diaphragm is uniformly connected with support spring, the bottom of the support spring and the top of upper backup pad connect, the pressure cell of simulation test with similar mat-erial experiment, pressure on pressure-sensitive diaphragm by analog material medium, it transmits directly down, reduce influence of the device housing to measurement accuracy, pass through holddown spring, the setting of rubber pad, play buffer function, pass through the setting of support spring, it reduces due to pressure-sensitive diaphragm, pressure conduction bar, lower pressed film Piece, mounting plate, holddown spring and pressure conduction plate gravity push pressure sensor and influence measurement accuracy.

Description

A kind of pressure cell of simulation test with similar mat-erial experiment

Technical field

The present invention relates to engineering foundation construction technique field, specially a kind of pressure of simulation test with similar mat-erial experiment Box.

Background technique

For pressure cell for carrying out between medium internal stress measuring and country rock and supporting construction in geotechnical engineering, injection is mixed The instrument of contact stress measurements between solidifying soil and cast-in-place concrete, original pressure cell is due to the measurement lesser similar material of rigidity Expect medium, it is more accurate to measure, this can be evenly distributed on the surface of pressure-bearing film, uniform force, when medium can not with medium again When being uniformly distributed, pressure is caused to act predominantly on pressure cell shell, causes pressure-bearing film stress to reduce, reduce the accurate of measurement Property, for this purpose, we have proposed a kind of pressure cells of simulation test with similar mat-erial experiment.

Summary of the invention

The purpose of the present invention is to provide a kind of pressure cells of simulation test with similar mat-erial experiment, to solve above-mentioned background skill The original pressure cell proposed in art due to measurement the lesser analog material medium of rigidity, measure it is more accurate, this again with Jie Mass-energy is evenly distributed on the surface of pressure-bearing film, and uniform force causes pressure to act predominantly on when medium can not be uniformly distributed On pressure cell shell, the problem of causing pressure-bearing film stress to reduce, reduce the accuracy of measurement.

To achieve the above object, the invention provides the following technical scheme: a kind of pressure of simulation test with similar mat-erial experiment Box, including device housing, the inner cavity top of described device shell are horizontally arranged with upper backup pad, offer on the upper backup pad Three groups of through-holes, and longitudinal direction is plugged with pressure conduction bar in three groups of through-holes, is connected with pressure membrane at the top of the pressure conduction bar Piece, the bottom of the pressure-sensitive diaphragm are uniformly connected with support spring, connect at the top of the bottom of the support spring and upper backup pad It connects, the bottom of the pressure conduction bar is connected with pushing diaphragm, and the bottom center for pushing diaphragm is connected with mounting plate, institute The bottom for stating mounting plate is uniformly connected with holddown spring, and the bottom of the holddown spring is connected with pressure conduction plate, described device The bottom of shell is equipped with capping, and the edge of the capping is uniformly provided with screw hole, and the capping passes through screw and device shell The top left and right sides of body connection, the capping is respectively connected with strut, and strut described in two groups is symmetrical about the longitudinal axis of capping, Top between strut described in two groups is connected with lower installation board, and rubber pad, the rubber are connected at the top of the lower installation board Pressure sensor is connected at the top of pad, the top of the pressure sensor and the bottom of pressure conduction plate fit, under described The bottom of mounting plate has been connected by screw to harness clips, and the bottom of the pressure sensor is connected with USB wiring, and the USB connects Line runs through rubber pad, lower installation board and harness clips, outlet hole is offered at the center of the capping, the USB wiring is through out String holes.

Preferably, described device shell and upper backup pad integrated injection molding.

Preferably, the left and right sidewall of the pressure conduction bar is respectively connected with draw runner, the inner cavity of through-hole on the upper backup pad Offer sliding slot compatible with draw runner.

Preferably, the junction of the USB wiring and the outlet hole in capping is provided with sealing ring.

Preferably, the pressure-sensitive diaphragm is copper diaphragm, and the pressure conduction bar, pushing diaphragm and mounting plate are poly- second Alkene structure.

Compared with prior art, the beneficial effects of the present invention are: the pressure cell of simulation test with similar mat-erial experiment, pressure Pressure on diaphragm by analog material medium, is transmitted directly down, is reduced influence of the device housing to measurement accuracy, is passed through pressure The setting of tight spring, rubber pad, plays buffer function, by the setting of support spring, reduces due to pressure-sensitive diaphragm, pressure conduction Bar, pushing diaphragm, mounting plate, holddown spring and pressure conduction plate gravity push pressure sensor and influence measurement accuracy.

Detailed description of the invention

Fig. 1 is schematic structural view of the invention.

In figure: 1 device housing, 2 upper backup pads, 3 pressure conduction bars, 4 pressure-sensitive diaphragms, 5 push diaphragm, 6 mounting plates, 7 pressures Tight spring, 8 pressure conduction plates, 9 pressure sensors, 10 rubber pads, 11 lower installation boards, 12 struts, 13 cappings, 14 screw holes, 15 lines Shu Jia, 16USB wiring, 17 support springs.

Specific embodiment

Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other Embodiment shall fall within the protection scope of the present invention.

Referring to Fig. 1, the present invention provides a kind of technical solution: a kind of pressure cell of simulation test with similar mat-erial experiment, packet Device housing 1 is included, the inner cavity top of device housing 1 is horizontally arranged with upper backup pad 2, three groups of through-holes are offered on upper backup pad 2, And longitudinal direction is plugged with pressure conduction bar 3 in three groups of through-holes, the top of pressure conduction bar 3 is connected with pressure-sensitive diaphragm 4, pressure-sensitive diaphragm 4 bottom is uniformly connected with support spring 17, and the bottom of support spring 17 is connect with the top of upper backup pad 2, pressure conduction bar 3 Bottom be connected with push diaphragm 5, push diaphragm 5 bottom center be connected with mounting plate 6, the bottom of mounting plate 6 uniformly connects It is connected to holddown spring 7, the bottom of holddown spring 7 is connected with pressure conduction plate 8, and the bottom of device housing 1 is equipped with capping 13, envelope The edge of lid 13 is uniformly provided with screw hole 14, and capping 13 is connect by screw with device housing 1, covers 13 top or so two Side is respectively connected with strut 12, and two groups of struts 12 are symmetrical about the longitudinal axis of capping 13, the top connection between two groups of struts 12 There is lower installation board 11, the top of lower installation board 11 is connected with rubber pad 10, and the top of rubber pad 10 is connected with pressure sensor 9, The top of pressure sensor 9 and the bottom of pressure conduction plate 8 fit, and the bottom of lower installation board 11 has been connected by screw to harness Folder 15, the bottom of pressure sensor 9 are connected with USB wiring 16, and USB wiring 16 runs through rubber pad 10, lower installation board 11 and harness Folder 15, covers and offers outlet hole at 13 center, and USB wiring 16 runs through outlet hole.

Wherein, device housing 1 and 2 integrated injection molding of upper backup pad, globality is preferable, the left and right sides of pressure conduction bar 3 Wall is respectively connected with draw runner, and the inner cavity of through-hole offers sliding slot compatible with draw runner, mobile more smooth, USB on upper backup pad 2 The junction of wiring 16 and the outlet hole in capping 13 is provided with sealing ring, increases the leakproofness of the device, plays protection effect, Pressure-sensitive diaphragm 4 is copper diaphragm, and pressure conduction bar 3, pushing diaphragm 5 and mounting plate 6 are polyethylene structure, mitigates quality.

In use, support spring 17 plays the role of support, the gross pressure that support spring 17 is subject to and pressure-sensitive diaphragm 4, pressure Power conductive bar 3, pushing diaphragm 5, mounting plate 6, holddown spring 7 are identical with the total force of pressure conduction plate 8, pressure conduction plate 8 Bottom is bonded with the top of pressure sensor 9 and not by active force, effect of the surface of pressure-sensitive diaphragm 4 by analog material medium When power, pressure-sensitive diaphragm 4 drives pressure conduction bar 3 to push, and pressure conduction bar 3 drives mounting plate 6 to push by pushing diaphragm 5, peace Loading board 6 drives pressure conduction plate 8 to push by holddown spring 7, and pressure conduction plate 8, which is pushed, generates pressure, rubber to pressure sensor 9 Rubber mat 10 and holddown spring 7 play the role of buffering, reduce and damage to the direct impact of pressure sensor 9, pressure sensing The pressure conversion being subject to is that voltage signal is exported by USB wiring 16 by device 9, by USB wiring 16 and measurement reception device or Person's computer connects and shows measurement data, to complete to measure.

It although an embodiment of the present invention has been shown and described, for the ordinary skill in the art, can be with A variety of variations, modification, replacement can be carried out to these embodiments without departing from the principles and spirit of the present invention by understanding And modification, the scope of the present invention is defined by the appended.

Claims

1. A pressure cell for a physical simulation experiment of similar materials, comprising a device housing (1), an upper support plate (2), a pressure transmission rod (3) and a pressure diaphragm (4), the device housing (1) The upper support plate (2) is laterally arranged at the top of the inner cavity of the machine, the upper support plate (2) is provided with three groups of through holes, and the pressure transmission rods (3) are longitudinally inserted into the three groups of through holes. , the top of the pressure transmission rod (3) is connected with the pressure diaphragm (4), characterized in that: the bottom of the pressure diaphragm (4) is evenly connected with a support spring (17), the support spring ( The bottom of 17) is connected with the top of the upper support plate (2), the bottom of the pressure transmission rod (3) is connected with a lower pressure diaphragm (5), and the bottom center of the lower pressure diaphragm (5) is connected with a A mounting plate (6), a compression spring (7) is evenly connected to the bottom of the mounting plate (6), a pressure conduction plate (8) is connected to the bottom of the compression spring (7), and the device housing ( 1) A cover (13) is installed at the bottom, and screw holes (14) are evenly opened at the edge of the cover (13), and the cover (13) is connected to the device housing (1) by screws, so The top, left and right sides of the cover (13) are connected with support rods (12). A lower mounting plate (11) is connected to the top of the lower mounting plate (11), a rubber pad (10) is connected to the top of the lower mounting plate (11), and a pressure sensor (9) is connected to the top of the rubber pad (10). The top of the sensor (9) is attached to the bottom of the pressure conduction plate (8), the bottom of the lower mounting plate (11) is connected to the wire harness clip (15) by screws, and the bottom of the pressure sensor (9) is connected with a USB cable (16), the USB cable (16) runs through the rubber pad (10), the lower mounting plate (11) and the wire harness clip (15), the center of the cover (13) is provided with an outlet hole, the The USB cable (16) passes through the outlet hole.

2 . The pressure cell for a physical simulation experiment of similar materials according to claim 1 , wherein the device casing ( 1 ) and the upper support plate ( 2 ) are integrally injection-molded. 3 .

3. A pressure cell for a physical simulation experiment of similar materials according to claim 1, characterized in that: the left and right side walls of the pressure transmission rod (3) are connected with sliding bars, and the upper support plate (2) The inner cavity of the upper through hole is provided with a chute adapted to the sliding bar.

4 . The pressure box for a physical simulation experiment of similar materials according to claim 1 , wherein a sealing ring is provided at the connection between the USB cable ( 16 ) and the outlet hole on the cover ( 13 ). 5 .

5. A pressure cell for a physical simulation experiment of similar materials according to claim 1, characterized in that: the pressure diaphragm (4) is a copper diaphragm, the pressure transmission rod (3), the lower pressure diaphragm Both the sheet (5) and the mounting plate (6) are of polyethylene construction.