CN2195617Y

CN2195617Y - Pressure digital-displaying single-body hydraulic prop

Info

Publication number: CN2195617Y
Application number: CN 93237480
Authority: CN
Inventors: 陈翀; 王玉坤
Original assignee: China University of Mining and Technology CUMT
Current assignee: China University of Mining and Technology CUMT
Priority date: 1993-08-18
Filing date: 1993-08-18
Publication date: 1995-04-26
Anticipated expiration: 2003-08-18

Abstract

The utility model discloses a pressure digital-displaying single hydraulic prop. An external injected single hydraulic prop composed of a cylinder block, an active prop, a three purpose valve, a top cover, etc. is provided, a lengthened segment is added between the top cover and the active prop on the external injected single hydraulic prop, and a pressure sensor arranged in the lengthened segment is connected with the active prop through screw threads and is communicated with the working medium in the active prop. The voltage signals output by a pressure sensor pass through a comparison amplifying circuit and a digital displaying circuit to ensure that pressure values of the inner cavity of the active prop is displayed in digital codes, and the comparison circuit is used to realize the light indication for the setting pressure achievement and the alarm indication for the prop pressure overrun. The utility model with the advantages of simple structure and convenient operation can know the pressure changing conditions of the prop in the work process.

Description

Pressure digital-displaying single-body hydraulic prop

The utility model relates to the outside injection type hydraulic pillar that a kind of energy numeral shows pressure.

The outside injection type hydraulic pillar of using is made up of top cover, triple-use valve, live post, cylinder body etc. at present.With fluid injection gun high-pressure emulsion being injected the pillar cavity of resorption by triple-use valve during use rises post alive.After pillar rose the stretching top board, pillar cavity of resorption fluid pressure reached the operating pressure of emulsion power pack, and the support force that this moment, pillar gave top board is setting load.Along with crushing, the load that face roof acts on the pillar increases, and when roof pressure surpassed the pillar working resistance of triple-use valve safety valve, the highly pressurised liquid in the pillar was excessive, and cavity pressure decreases, and contracts under the pillar; When the suffered load of pillar was lower than working resistance, safety valve cut out, and intracavity liquid stops excessive, and above-mentioned phenomenon repeats in the supporting process.Therefore, the pillar service load should remain at about yield load.But pillar can't be learnt the concrete numerical value of pillar internal pressure when work, so, whether reach setting load and only depend on operating personnel's experience to judge, all reach setting load in the time of can't guaranteeing the pillar setting prop like this.If slowly leaking appears in pillar, can cause the decline of pillar, cause on the work plane each column load inhomogeneous, this tends to cause down the accident of post.If safety valve breaks down in the triple-use valve, pillar inner high voltage liquid can't be excessive, causes that cavity pressure sharply increases under the pillar, so that damage pillar.

The purpose of this utility model just provides the outside injection type hydraulic pillar that a kind of pressure on the number shows, it can show the pressure of its inner chamber in the entire work process of pillar, and can when pillar reaches setting load, send the light indication, and the indication of when shore supports power surpasses working resistance, reporting to the police.

Formation of the present utility model is: the outside injection type hydraulic pillar of being made up of top cover, triple-use valve, live post, cylinder body etc., between its top cover and post alive, add a lengthening section, pressure sensor, comparison amplifying circuit, digital display circuit and power supply all place in the lengthening section, and nixie display and alarm lamp place on the lengthening section external surface.Adopt linear hall element to communicate with thread connection and with working media in the post of living with the post of living as the pressure sensor of sensing element, when the pillar stand under load, chamber pressure raises and acts on the pressure sensor, pressure sensor changes pressure signal into the voltage signal linear with it, this voltage signal is after comparing amplifying circuit and digital display circuit, number shows the force value of the post inner chamber of living, and realizes reaching indication of setting load light and pillar pressure limit warning indication by comparison circuit.

The utility model is simple in structure, and is easy to use, and keeps the performance of original pillar, thereby can use existing all corollary equipments; In the pillar entire work process, realize the numeral demonstration of a column pressure, thereby in time understand the pressure changing of pillar; The realization that setting load shows reaches the setting load of regulation when having guaranteed setting prop; When safety valve breaks down, can in time report to the police during the pillar pressure limit, so that take corresponding emergency measure.Adopt the utility model, can be convenient to roof control, reduce local inbreak of top board and pillar and tilt and collapse accident, reduce the work plane off-time.

Embodiment of the present utility model elaborates in conjunction with the accompanying drawings, wherein:

Fig. 1 a is a structural representation of the present utility model, and Fig. 1 b is that its A is to view.

Fig. 2 is an electrical schematic diagram of the present utility model.

With reference to shown in Figure 1: on the outside injection type hydraulic pillar of forming by cylinder body 1, live post 2, triple-use valve 3, top cover 4 etc., add a lengthening section 9 between top cover 4 and the post 2 alive, pressure sensor 5, comparison amplifying circuit and digital display circuit 6, power supply 8 all place in the lengthening section 9, and nixie display and alarm lamp 7 place on lengthening section 9 external surfaces.Pressure sensor 5 communicates with post 2 usefulness thread connection alive and with working media in the post of living.This pressure sensor 2 is to adopt linear hall element as sensing element, when the pillar stand under load, the post chamber pressure of living raises and acts on the pressure sensor, pressure sensor 5 converts pressure signal to the voltage signal linear with it, and this voltage signal send comparison amplifying circuit and digital display circuit 6.

With reference to shown in Figure 2: relatively amplifying circuit of the present utility model and digital display circuit 6 are that voltage signal with pressure sensor 2 outputs is through resistance R ₂, R ₃Divide force feed amplifier IC ₁3 ends, IC ₁2 ends respectively through resistance R ₁Meet adjustable potentiometer W ₁With through resistance R ₄Meet IC ₁1 end.Regulate the W that is connected with power Vcc ₁One reference voltage can be provided, and the quiescent voltage of sensor equated when this voltage was unloaded with pillar.IC ₁The amplification of 1 end output after voltage signal divide send amplifier IC at three the tunnel: the one tunnel ₂5 ends and amplifier IC ₃9 ends, the one tunnel send amplifier IC ₄12 ends, the one tunnel through resistance R ₁₈Send IC ₆31 ends.Vcc is through resistance R ₅, R ₆Divide crimping IC ₂6 ends, IC ₂7 ends output through resistance R ₉Meet triode BG ₁Base stage, Vcc is through luminous tube LED ₁, resistance R ₁₁Meet BG ₁Colelctor electrode, BG ₁Emitter stage meet triode BG ₂Colelctor electrode; Vcc is through resistance R ₇, R ₈

Divide crimping IC

₃10 ends, IC ₃8 ends output through resistance R ₁₀Meet BG ₂Base stage, BG ₂Grounded emitter.Here: R ₅, R ₆Be IC ₂Provide a reference voltage, IC when this magnitude of voltage is equivalent to pillar and reaches setting load ₁Output voltage is so work as IC ₁Output voltage during greater than this reference voltage, IC ₂7 ends output high level, BG ₁Conducting, LED ₁Bright; R ₇, R ₈Be IC ₃One reference voltage is provided, and this magnitude of voltage is a bit larger tham IC when reaching setting load ₁Output voltage, work as IC ₁Output voltage is during greater than this reference voltage, IC ₃8 ends be output as low level, BG ₂End LED ₁Go out, realized the light indication of setting load like this.Vcc is through resistance R ₁₂, R ₁₃Divide crimping IC ₄13 ends, IC ₄14 ends output through resistance R ₁₄Meet triode BG ₃Base stage, Vcc is through luminous tube LED ₂, resistance R ₁₅Meet BG ₃Colelctor electrode, BG ₃Grounded emitter.Here: R ₁₂, R ₁₃Be IC ₄Provide a reference voltage, IC when this voltage is a bit larger tham pillar and reaches working resistance ₁Output voltage, work as IC ₁Output voltage is during greater than this reference voltage, IC ₄14 ends be output as high level, BG ₃Conducting, LED ₂Bright, thus realize superpressure warning indication.IC ₁～IC ₄Be to adopt a slice integrated chip LM324 four high guaily unit.By integrated chip (ADC7107) IC ₆, potentiometer W ₂, resistance R ₁₆～R ₁₉, capacitor C ₁～C ₅, three LED charactrons typical case of having constituted 7107 digital display circuit uses connection because this circuit is a single power supply, and 7107 are positive-negative power supplies, so increase by one by hex inverter (CD4069) IC ₅The DC-DC supply convertor that constitutes.Wherein its " not gate " 5,6 and resistance R ₂₀, R ₂₁, capacitor C ₈Form multivibrator, snubber output is done in " not gate " 1～4 four a group parallel connection, and to enlarge driving force, pulse voltage is through capacitor C ₇Be coupled to two diode D ₁, D ₂Make voltage multiplying rectifier, again through C ₆Filtering inserts 7107 26 ends, and 7107 with IC ₁Output voltage carries out analog-to-digital conversion and drives three LED charactrons making it show IC ₁The size of output voltage.Because can be with IC ₁The output voltage size transfers to the big or small numerically equal with pressure, so three digital magnitudes of voltage that show of LED have promptly been represented the force value of post inner chamber alive, thereby the numerical value of having realized pressure shows.Power supply 6 employing cell voltage Vcc(+12V) or with the 220V alternating voltage after transformation, rectification, filtering, voltage stabilizing, obtain direct-current working volts Vcc(+12V).

Claims

1, a kind of hydraulic prop of pressure on the number demonstration is on the outside injection type hydraulic pillar of being made up of cylinder body (1), the post (2) of living, triple-use valve (3), top cover (4), adds a lengthening section (9) between top cover (4) and the post alive (2), it is characterized in that:

A. pressure sensor (5), comparison amplifying circuit and digital display circuit (6), power supply (8) all place in the lengthening section (9), and nixie display and alarm lamp (7) place on the external surface of lengthening section (9); Adopt linear hall element to communicate with thread connection and with working media in the post of living with the post (2) of living as the pressure sensor (5) of sensing element, the voltage signal of pressure sensor (5) output send comparison amplifying circuit and digital display circuit (6);

B. relatively amplifying circuit and digital display circuit (6) be with: the voltage signal of pressure sensor (5) output is through resistance R ₂, R ₃Send amplifier IC after the dividing potential drop ₁3 ends, IC ₁2 ends respectively through resistance R ₁Meet adjustable potentiometer W ₁With through resistance R ₄Meet IC ₁1 end, Vcc is through W ₁Ground connection, IC ₁1 end output divide send amplifier IC at three the tunnel: the one tunnel ₂5 ends and amplifier IC ₃9 ends, the one tunnel send amplifier IC ₄2 ends, the one tunnel through resistance R ₁₈Send IC ₆(7107) 31 ends;

C.Vcc is through resistance R ₅, R ₆Divide crimping IC ₂6 ends, IC ₂7 ends output through resistance R ₉Meet triode BG ₁Base stage, Vcc is through luminous tube LED ₁, resistance R ₁₁Meet BG ₁Colelctor electrode, BG ₁Emitter stage meet triode BG ₂Colelctor electrode, Vcc is through resistance R ₇, R ₈Divide crimping IC ₃10 ends, IC ₃8 ends output through resistance R ₁₀Meet BG ₂Base stage, BG ₂Grounded emitter;

D.Vcc is through resistance R ₁₂, R ₁₃Divide crimping IC ₄13 ends, IC ₄13 ends, IC ₄14 ends output through resistance R ₁₄Meet triode BG ₃Base stage, Vcc is through luminous tube LED ₂, resistance R ₁₅Meet BG ₃Colelctor electrode, BG ₃Grounded emitter;

E. by integrated chip (ADC7107) IC ₆, resistance R ₁₆～R ₁₉, potentiometer W ₂, capacitor C ₁～C ₅, three LED charactrons typical case of having constituted 7107 digital display circuit uses connection, hex inverter (CD4069) IC that uses as the DC-DC supply convertor ₅, be with its " not gate " 5,6 and resistance R ₂₀, R ₂₁, capacitor C ₈Form multivibrator, snubber output is done in " not gate " 1～4 four a group parallel connection, and pulse voltage is through capacitor C ₇Be coupled to two diode D ₁, D ₂Make voltage multiplying rectifier, again through C ₆Connect 7107 26 ends after the filtering, 7107 with IC ₁Output voltage carries out analog-to-digital conversion and drives three LED charactrons making it demonstrate IC ₁The size of output voltage.

2, hydraulic prop according to claim 1 is characterized in that: when the pillar stand under load, the post chamber pressure of living raises and acts on the pressure sensor (5), and pressure sensor (5) converts pressure signal to the voltage signal linear with it.

3, hydraulic prop according to claim 1 and 2 is characterized in that: regulate W ₁Be IC ₁The quiescent voltage of sensor (5) equated when a reference voltage that provides was unloaded with pillar; R ₅, R ₆Be IC ₂An IC when reference voltage that provides is equivalent to pillar and reaches setting load ₁Output voltage; R ₇, R ₈Be IC ₃A reference voltage that provides is a bit larger tham IC when reaching setting load ₁Output voltage; R ₁₂, R ₁₃Be IC ₄An IC when reference voltage that provides is a bit larger tham pillar and reaches working resistance ₁Output voltage.

4, hydraulic prop according to claim 1 and 2 is characterized in that: IC ₁～IC ₄Be to adopt a slice integrated chip four high guaily unit LM324.

5, hydraulic prop according to claim 3 is characterized in that: IC ₁～IC ₄Be to adopt a slice integrated chip four high guaily unit LM324.

6, hydraulic prop according to claim 1 and 2 is characterized in that: IC ₁The voltage swing of output transfers to the big or small numerically equal with pressure, and three digital magnitudes of voltage that show of LED are the force value of post inner chamber alive.

7, hydraulic prop according to claim 3 is characterized in that: IC ₁The voltage swing of output transfers to the big or small numerically equal with pressure, and three digital magnitudes of voltage that show of LED are the force value of post inner chamber alive.