CN2036659U - Magnetic pressure type solidifying apparatus - Google Patents

Abstract

The utility model belongs to an earth working experimental instrument, which is mainly used for the measurement of foundational parameters of earth works such as tunnels, bridges, large dams, culverts, tall buildings, etc. The utility model adopts electromagnetic attracting force pressure device, and all of works of pressurization, measurement and results displaying are completed by computers. The utility model has the advantages of simple structure, advanced technique, high automation, accurate measuring result and work efficiency enhancing, etc.

Description

Magnetic pressure type solidifying apparatus

The utility model belongs to geotechnological experimental apparatus, is mainly used in the measurement of basic geotechnological parameters such as tunnel, bridge, dam culvert, skyscraper.

At present, both at home and abroad parameters such as the settling amount of the soil of dam, skyscraper, compressibility coefficient, modulus in compression, the coefficient of consolidation are adopted pressuring methods such as artificial counterweight loading or oil pressure, air pressure, hydraulic pressure.The total existence leaks because pressure regulator valve works long hours.Therefore baric systerm work is stable inadequately.Also occur lantern gland when adopting oil pressure, hydraulic pressure and leak short phenomenon in serviceable life.This two classes pressuring method all will be with pressue devices such as gas storage cylinder or oil pumps.Use inconvenience, and artificial counterweight loading will upwards add counterweight by the tester on time, labour intensity is big, can not realize automatic control.

The purpose of this utility model is exactly in order to overcome above-mentioned shortcoming, and a kind of magnetic pressure consolidometer is provided, and adopts electromagnetic attraction that soil sample is produced required pressure, measures desired parameters by system controlled by computer then.

Pressue device of the present utility model (being the magnetic pressure head) is by electromagnetic core, coil iron yoke, and coil and lower cover are formed, and its structure is shown in Figure of description.

Fig. 1 is the utility model pressue device structural representation.

Fig. 2 is the utility model logic diagram.

Such as Fig. 1, electromagnetic core 3 is fixedly connected with shell 4 upper surfaces. Lower cover 8 is fixedly connected with shell 4 lower ends, and lower cover 8 is a circle, and its lower surface protrudes round end by one; Shell 4 is drums, and both sides have vertical slot; Coil iron yoke 5 welds with the accessory plate of two stands 7 upper ends, and this accessory plate is that the vertical slot and the coil iron yoke 5 that pass shell 4 both sides weld. Two stands 7 lower ends are fixed on the base 16, and base 16 middle parts are mounted with pressure sensor 15. Being upper and lower permeable stone 10,14 on it, upper and lower permeable stone 10, be soil sample 13 in the middle of 14, and lead ring 11 is used for guiding permeable stone to move, and cutting ring 12 is used for soil sampling 13. Upper dankness stone 10 tops are fixed with circular pressing plate 9. Circular pressing plate 9 upper surfaces have the bossy body with recess, this recess matches with the protrusion round end of lower cover 8 lower surfaces, displacement transducer 1 is fixed on the left socle 7 through sensor support bar 2, the central shaft of displacement transducer 1 is placed in the shell 4 upper end central recess, and pressure sensor 15 is connected with displacement transducer and is connected with computer through shielded cable respectively. The lead-out wire of coil 6 is connected with the current source of computer, and whether it switches on by computer control. Computer can adopt arbitrary micro computers such as PC-1500, Macintosh.

As shown in Figure 1, 2, the utility model is with electromagnetic attraction soil sample to be produced required pressure. When computer-controlled current source is switched on to coil 6, produce magnetic field. Electromagnetic core 3 moves downward under the effect in magnetic field, driving shell 4 and lower cover 8 together moves downward, the protrusion round end of lower cover 8 lower surfaces just transfers the pressure on the pressing plate 9, and soil sample 13 is under pressure, and pressure sensor 15 and displacement transducer 1 all will have signal output. The size of pressue device reinforcing, pressing time length, keep the identical all by a microcomputer control of pressure, pressure sensor and displacement transducer are sent pressure and displacement into computer, carry out parameter by the computer program that sets in advance and process, and print various measurement data and curve. Its software (comprising pressure size, pressing time, data processing Mathematical Modeling etc.) can be by each specialty and engineers and technicians' designed, designed. In addition, but the utility model also simulated earthquake, flood, the transient force such as shellburst, make the utility model draw the parameter curve of soil sample under these states, to antiseismic, the explosion-proof of military and civil buildings, flood fighting peak performance design provides systematic parameter.

Simple in structure, the advanced technology of the utility model makes soil sample test from 0.5Kg/cm ²To 12Kg/cm ²So that bigger pressure can be realized on an instrument.The utility model also can be according to user's needs, form three～ten automatic magnetic pressure consolidometer by three, five or ten unit, a shared microcomputer is controlled and record automatically, has improved work efficiency, automaticity height, measurement result are more accurate and directly perceived.

Embodiment: (forming the automatic magnetic pressure consolidometer of a cover 5-linked with five pressue devices shown in Figure 1 is example):

After five parts of soil samples 13 being put into upper and lower stone 10,14 centres respectively with five cutting rings 12, the Automatic Program that computing machine is finished according to the user gives coil 6 energisings, soil sample 13 is under the pressure effect of magnetic pressure head, produce compression, pressure transducer 15 with the parameter of power as calculated machine I/O mouth send CPU, numerical value through sequential operation Control current source, so that the pressure stability of magnetic pressure head, and press clock, program increase.After displacement transducer 1 and pressure transducer 15 were sent signal back to computing machine, computing machine at the appointed time write down displacement and pressure parameter and print result automatically according to program, if the apparatus measures result occurs when unusual, autoalarm will be worked.

The utility model also can be used on triaxial apparatus or the shearing instrument, with the variation and the maintenance of realizable force, these instruments is undergone a radical change.

Claims (3)

1, a kind of by pressure transducer 15, upper and lower permeable stone 10,14, pressing plate 9 bases 16, the magnetic pressure consolidometer that support 7 and displacement transducer 1 and computer system are formed, it is characterized in that its pressue device by electromagnetic core 3, coil iron yoke 5, coil 6 and lower cover 8 are formed.

2, by the described magnetic pressure consolidometer of claim 1, it is characterized in that electromagnetic core 3 fixedlys connected with the upper surface of shell 4, lower cover 8 is fixedlyed connected with the lower end of shell 4; Shell 4 is a drum.Both sides have vertical slot, and the accessory plate of support 7 just passes the vertical slot and 5 welding of coil iron yoke of shell 4.

3, by claim 1,2 described magnetic pressure consolidometer, it is characterized in that displacement transducer 1, pressure transducer 15 are connected with Computer I/O mouth by shielded cable; The lead-in wire of coil 6 is connected with the current source of computing machine.

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