CN2062836U - Pressure tester with single hydraulic pillar - Google Patents

Abstract

The utility model discloses a pressure tester for a single body hydraulic prop. The pressure tester for a single body hydraulic prop is composed of four parts of an interface body, an instrument box, a handle, and a lever pushing mechanism. When the pressure tester for a single body hydraulic prop measures, the interface body and the three-purpose valve of a single body prop are fixed. The lever pushing mechanism is used for making the valve ball pushed aside by a plunger piston. Pressure oil passes through the hole of the plunger piston to act on a pressure sensor, and a pressure value is displayed by a digital display. The pressure tester for a single body hydraulic prop has the advantages of convenient operation and carrying, high precision, stabilization, and reliability. The pressure tester for a single body hydraulic prop is applicable to the requirement that the pressure of each prop of a coalface is tested at any time.

Description

Pressure tester with single hydraulic pillar

Belong to pressure detection instrument class.

The mechanical compression box is mainly used in the hydraulic prop pressure survey of existing colliery, measures at the bottom of it is installed in pillar top or post.This pressure measurement mode needs to install pressure cell on every post to be measured, and the condition in view of coal face is far from suitable.Also has a kind of device that can measure pressure in the cylinder by the individual prop triple-use valve, i.e. the pressure measurement triple-use valve.Establish a kind of screw mechanism in this valve body and promote valve ball, pressure is surveyed with tensimeter and is read.The troublesome poeration of this spiral pushing mechanism, mechanical compression meter accuracy low (MP), poor stability, it is big that time error is read in survey, is not easy to operation and carries.

The purpose of this utility model is: it is little to design measuring error, carries easy to operate pressure detecting instrument, becomes the mechanical pressure tabular form and shows into electronic digit.

The technical solution of the utility model is: adopt the lever pushing plunger to back down valve ball, pressure oil is acted on the pressure transducer through plunger hole, sensor demonstrates pressure values in the cylinder through electronic digital displayer.

Fig. 1 is a structural representation of the present utility model.

1 is coupling sleeve among the figure, colludes on the triple-use valve body of pillar; The 2nd, interface agent, front end is the interface that connects triple-use valve, one O-ring seal 16 is arranged in the interface, a plunger hole is arranged in the interface agent, dress plunger 3 in the hole, a through hole (fluid passage) is arranged in the plunger 3, there is O-ring seal 15 the plunger front portion, and there is a boss at the plunger middle part, and fork 4 is equipped with at the boss rear portion, fork 4 usefulness bearing pins 14 are connected in the bottom of interface agent 2, and the bottom of fork 4 is connected to handgrip 13; Fork 4 and handgrip 13 and bearing pin 14 constitute a leverage that promotes plunger; A pressure transducer 5 is housed in the back stomidium of plunger 3, and oil pressure acts on the pressure transducer 5, by the secondary change-over circuit, makes digital indicator 6 demonstrate pressure values.Digital indicator 6 is fixed in the instrument box 7; instrument box 7 usefulness bolts 8 are fixed on the underbeam of interface agent, and handle 9 tops also are fixed on the underbeam of interface agent, and battery 10 is housed in the handle 9; switch 12 is equipped with in the front side of handle 9, with guard ring 11 protection switches.

Use is: interface agent 2 front-end interfaces are inserted in the pillar triple-use valve interface, catch on triple-use valve by coupling sleeve 1, open switch 12, move handgrip 13, fork 4 promotes plunger 3 reaches opens valve ball, pressure oil acts on the sensor 5 through the endoporus of plunger, and digital indicator 6 promptly demonstrates the pressure values in the cylinder.

Fig. 2 is a circuitry lines.20 is operational amplifiers among the figure, and it carries out suitable amplification to the signal of sensor 5 output, with the displayed value that guarantees whole instrument and the corresponding relation of sensor input pressure signal; Its enlargement factor is according to the output signal of sensor 5.The maximum range of 3 1/2 analog to digital conversion sheets 17 and reference voltage size are determined.3 1/2 conversion sheet 17 will be carried out the A/D conversion through amplifier 5 adjusted signals, and the conversion back is inner through deciphering the control level of direct output 7 hop count sign indicating numbers.3 1/2 LCD plate 6 are controlled by the output level of 3 1/2 analog to digital conversion sheets 17, directly show the force value of sensor 5.Hex inverter 19 cooperates the demonstration of control LCD plate radix point with the output terminal of one of them function of conversion sheet 17.Three-terminal regulator block 18 is supplied with sensor 5 after with the output voltage voltage stabilizing of supplying cell, to guarantee the stability of sensor 5 output signals.

Claims (1)

1, a kind of hydraulic prop pressure detecting instrument is characterized in that:

A has an instrument box, and digital indicator is housed in the case.

B connects an interface agent in the instrument box front side, a hole is arranged in the interface agent, and the plunger that a centre has oilhole is housed in the hole, and a pressure transducer is housed in the plunger back-end mouth, and sensor and digital indicator link;

C is in the boss back at interface agent middle part, have one by shift fork, handgrip and bearing pin constitute leverage;

D connects a handle on the interface agent underbeam, battery is housed in the handle, and switch is arranged on the handle.

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