CN105571564A - Height measuring sensor and hydraulic support using same - Google Patents

Abstract

A height measurement sensor, including a pressure sensor, a liquid pipeline, and a bottom valve seat and a top member, the bottom valve seat includes a liquid replenishment check valve, and the pressure sensor is installed in the bottom valve seat; The bottom end valve seat is connected to the top end member through the liquid pipeline, the top end member has an orifice and the top end member is configured to have a structure that reduces the function of liquid evaporation. The bottom valve seat structure of the present invention includes two one-way valves, which are convenient for liquid replenishment and pressure sensor replacement, flexible and convenient to use, and avoid the influence of liquid loss and evaporation on measurement, making it closer to engineering applications; the top components can be selected from different The three forms are suitable for different working situations, and can effectively reduce the height error caused by liquid evaporation.

Description

The hydraulic support of a kind of elevation carrection sensor and use elevation carrection sensor

Technical field

The present invention relates to a kind of elevation carrection sensor, particularly relating to a kind of survey sensor of the height for measuring the underground equipments such as hydraulic support and the hydraulic support with above-mentioned survey sensor.

Background technology

Along with improving constantly of underground coal mine fully-mechanized mining working automatization level, real-time, Measurement accuracy and the reading of mining height data are more and more important.As the important parameter that workplace controls, it combines with pressure data, can reflect roof and floor mechanics in time, have directive function to safety in production; In addition, altitude information is used for coal production process monitoring, according to the coal cutting degree of depth and height, automatically calculates mine coal output, there is positive realistic meaning.

The method that existing support height is measured has: on the parts such as set cap, caving shield, connecting rod, base, install obliquity sensor additional, calculate support height by trigonometric function, the method precision is large compared with low, operand, system complex, installation and maintenance are more difficult; Have in addition and install the sensor such as laser or ultrasound wave at set cap, measure the light between back timber to base or acoustic reflection distance, the method is to reflecting surface, require higher to on-the-spot light, coal dust, and reliability is poor.So at present, the measurement of support height also mainly relies on the scale bar that manual observation force piece suspends in midair to complete, and due to impacts such as workplace coal dust, spaces, causes certain influence to timberer's work quality.

In the prior art, CN103017705A discloses a kind of altitude measurement system of hydraulic support, comprise pressure transducer, control module, power module and hydraulic hose, the airtight Bonding pressure sensor in hydraulic hose one end, other end opening, be loaded with liquid in hydraulic hose, control module Bonding pressure sensor, gather pressure data by pressure transducer and be converted into support height; CN104364468A discloses a kind of altitude measurement system of hydraulic support, comprises flexible pipe level meter, and the end of flexible pipe is furnished with pressure transducer, and the liquid-column height detected by pressure transducer connects the absolute altitude conversing protection supporting frame; CN101881609A disclose a kind of can the device of monitoring vertical displacement, it can be used to the operating range of monitoring hydraulic support, comprise retaining valve, connecting pipe, piezoelectric strain gauge, data processor and process computer, when range conversion between retaining valve and piezoelectric strain gauge changes, exported by piezoelectric strain gauge perception, thus draw displacement and and then the height to obtain between two mobile objects.

But above-mentioned documents does not all openly have the structure preventing soft liquid in pipe from evaporating or overflowing, and does not openly have special fluid infusion parts yet.

Summary of the invention

For solving the problem, the present invention proposes a kind of elevation carrection sensor, comprises pressure transducer, liquid line, bottom valve seat and top end component, and described bottom valve seat comprises fluid infusion retaining valve, and described pressure transducer is arranged in the valve seat of described bottom; Described bottom valve seat is connected with described top end component by described liquid line, and described top end component has restriction and described top end component is configured with the structure weakening liquid vaporization function.

Preferred described bottom valve seat also comprises sensor retaining valve, and described pressure transducer is arranged in the valve seat of described bottom by described sensor retaining valve.

Preferred described top end component is liquid storage cylinder, and described restriction is arranged on the sidewall of described liquid storage cylinder.

Preferred described top end component is for waiting horizontal plate coil.

Preferred described top end component is constant amplitude spiral pipe.

A kind of hydraulic support, it has above-mentioned elevation carrection sensor, and described bottom valve seat is fixedly installed on the base of described hydraulic support.

Bottom valve holder structure of the present invention comprises 2 retaining valves, is convenient to fluid infusion and changes pressure transducer, flexible and convenient to use, avoids fluid loss and evaporates measuring the impact produced, making it more be close to engineer applied; Top end component can select 3 kinds of different forms, is applicable to different workplaces, all can effectively reduce liquid and evaporate the height error brought.

Accompanying drawing explanation

Accompanying drawing 1 is for being provided with the structural representation of the hydraulic support of elevation carrection sensor of the present invention;

Accompanying drawing 2 is the structural representation of the bottom valve seat of elevation carrection sensor in accompanying drawing 1;

Accompanying drawing 3-5 is the structural representation of top end component multi-form in elevation carrection sensor.

Reference numeral is as follows:

1-bottom valve seat; 2-top end component; 3-liquid line; 10-fluid infusion retaining valve; 11-sensor retaining valve; 20-restriction; 21-liquid storage cylinder.

Embodiment

Below in conjunction with accompanying drawing, the present invention is described in further detail.

See accompanying drawing 1, elevation carrection sensor is arranged on hydraulic support, adopts the method for hydrostatic pressure to carry out the measurement of height.

Elevation carrection sensor comprises pressure transducer, bottom valve seat, top end component, liquid line four part substantially.Pressure transducer is installed on the valve seat of bottom, is fixed on hydraulic support foundation by bottom valve seat; Bottom valve seat is connected by liquid line with top end component, is full of liquid in liquid line; Top end component is fluid storage device, and has restriction, is communicated with ambient atmosphere, forms an overall fluid loop, by pressure transducer measuring circuit pressure.

See accompanying drawing 2, bottom valve seat part comprises fluid infusion retaining valve, can also comprise the parts such as sensor retaining valve; When liquid evaporation in liquid line or when surprisingly overflowing, in pipeline, carry out fluid infusion by fluid infusion retaining valve, when top end component restriction overflows only, guarantee in pipeline without air; Can sensor retaining valve setting pressure sensor be passed through, when pressure transducer damages, can more emat sensor at any time, and in pipeline, liquid can not overflow.

Top end component part is fluid storage device, and Main Function is weaken the impact of liquid evaporation on elevation carrection.Can have three kinds of ways of realization: see accompanying drawing 3, it is liquid storage cylinder form, and top is the cavity body of a constant volume, and inside is full of liquid, and sidewall is opened restriction and is communicated with air, slow down the direct evaporation of liquid; See accompanying drawing 4, it is for waiting horizontal plate coil form, and under this form, liquid line carries out spiraling layout with the form of similar mosquito-repellent incense in same level, and in liquid evaporation under normal circumstances, liquid level is substantially constant; See accompanying drawing 5, it is constant amplitude spiral pipe form, and under this form, liquid line is with spring-like form screw arrangement, and opposed vertical pipeline, in same evaporation capacity situation, has less height change, reduce height error with this.

In measuring process, according to formula P=ρ * g*H, in liquid, certain any pressure P is directly proportional with the vertical height H of this some distance liquid level, so utilizes pressure transducer to measure the pressure of liquid level under liquid and can measure the height of its liquid level.Further, lower liquid level is fixed on bracket base position, upper liquid level is fixed on set cap position, so liquid level can characterize support height.

The output of sensor is voltage (or electric current) signal of standard, directly can access support electric-control system analog quantity and detect calculating and the display that interface carries out height, computing method:

Such as, transducer range is 0 ~ 70Kpa, and output signal is 0.5 ~ 4.5VDC, then 70kPa respective heights is roughly 7 meter water columns, according to pressure formula,

$H=\frac{P}{\mathrm{\ρ}*g}$

Herein, ρ gets 1000kg/m ³, g gets 9.8m/s ²; Pressure transducer exports and does analog to digital conversion through CPU, obtains magnitude of voltage V, unit mv, then

$H=\frac{\frac{V-500}{4000}*70*{10}^3}{{10}^3*9.8}*{10}^3$

H unit is millimeter, after simplification, following formula can be adopted to calculate:

$H=\frac{V-500}{98}*175$

Wherein, V unit is mv, H unit is mm.

Measuring height H is hydraulic support true altitude value with sensor setting height(from bottom) (comprising the height h2 of distance top depth of beam h1 and distance base) sum

The above; be only patent of the present invention preferably embodiment; but the protection domain of patent of the present invention is not limited thereto; anyly be familiar with those skilled in the art in the technical scope of patent diselosesll of the present invention; the change that can expect easily or replacement, within the protection domain that all should be encompassed in patent of the present invention.

Claims (6)

1. A height measurement sensor, comprising a pressure sensor and a liquid pipeline, is characterized in that: it also includes a bottom valve seat and a top member, The bottom valve seat includes a liquid replenishment check valve, and the pressure sensor is installed in the bottom valve seat; The bottom end valve seat is connected to the top end member through the liquid pipeline, the top end member has an orifice and the top end member is configured to have a structure that reduces the function of liquid evaporation. 2. The height measurement sensor according to claim 1, wherein the bottom valve seat further comprises a sensor check valve, and the pressure sensor is installed in the bottom valve seat through the sensor check valve . 3. The height measuring sensor according to claim 1 or 2, characterized in that: the top member is a liquid storage chamber, and the throttle is arranged on a side wall of the liquid storage chamber. 4. The height measuring sensor according to claim 1 or 2, characterized in that: the top member is an equi-level spiral tube. 5. The height measuring sensor according to claim 1 or 2, characterized in that: the top member is a constant-amplitude spiral tube. 6. A hydraulic support, characterized in that it has the height measuring sensor according to any one of claims 1-5, and the bottom end valve seat is fixedly arranged on the base of the hydraulic support.