CN2059939U - Digital alarm for monitoring mine roof - Google Patents

Abstract

The utility model relates to one of serial products of the alarming instrument for monitoring the roof. The utility model is suitable for measuring the subsidence quantity and the rebound quantity of the underground roof of the coal mine, and can also be used for the cavern engineering of the traffic, the water conservancy and the electric force to monitor the roof. An essential safe instrument is composed of a mechanical drive structure, a displacement digital display and a sound-light alarm. The integration degree of the circuit is high, the circuit is simple and reliable, and the regulation is easy. When the displacement quantity of the subsidence of the roof is reached the presetting dangerous subsidence quantity, the instrument simultaneously sends out the sound alarm signal and the light alarm signal for 10 minutes. The utility model has the advantages of small volume, light weight, firmness and durability, moisture prevention, shock prevention, simple operation, and convenient maintenance.

Description

Digital alarm for monitoring mine roof

The utility model is one of top board monitoring alarm instrument family product, is applicable to measure coal mine lower roof plate deflection and springback capacity; Also can be used in the cavity engineering of traffic, hydraulic and electric engineering, to the monitoring of top board.

In recent years, both at home and abroad development top board monitoring alarm instrument is attached great importance to.The RM-1 type surrouding rock stress monitor of abroad promoting the use of that the U.S. is arranged, SAK rock noise monitoring system of Poland and SYOK microseism navigation system etc., these system architectures be than bulky complex, high price.Though the domestic KY-80 type that the Shandong Mineral College development is arranged, the dynamic instrument of KY-82 type top board, the DL-2.5 type measuring staff that fushun coal mine safety instrument factory produces etc., but these instruments relatively more outstanding weak point in the use of down-hole is not to be with acoustooptic alarm system, and it is clear inadequately etc. to show.The inbreak of mine stope top board has a strong impact on the efficient of coal excavation apparatus and workman's safety.

At any time to understand top board dynamic for the operating personnel that make stope, and the strict control top board improves workman's safety condition, enhances productivity.According to the characteristics of underground work, requirement sound, light are reported to the police, and clear display is offered an explanation with being easy to, and also require to have the time (being lead) of speedily carrying out rescue work.For this reason, invented digital top board monitoring alarm instrument.

The key technical indexes of the present utility model

Explosion-proof form ibI(+150 ℃)

The scope of application 0.9～3.5m

Can the amount of contracting 200mm

Display mode LED3 1/2 figure place sign indicating number shows

Resolution 0.1mm

Relative accuracy ± 1.5%

Rated voltage 7.2V

0～40 ℃ of environment temperature

Relative maximal humidity 97%

Battery continuous operation 72 hours

The 8 hours battery charge time (carry out on ground)

Design feature of the present utility model

The utility model mainly shows and sound, optical alarm circuit etc. are partly formed by mechanical transmission structure and displacement are digital.

Fig. 1 is digital top board monitoring alarm instrument frame for movement.By adjustable pipe 1, initiatively manage 2, alarm lamp 3, display switch 4, zeroing key 5, casing 6, extension bar 7, Universal-head 8, warning positioner 9, displacement show 10, loudspeaker 11, under-voltage indication 12, battery 13, sound equipment options button 14, power switch 15 etc. are partly formed.

Warning positioner 9 among Fig. 1 is adjusted pull bar 29, is triggered and adjust scale 30 formations by (Fig. 2) triggering ring 26, spacing ring 28, alarm.Trigger ring 26 with trigger between the adjustment scale 30 be connected with screw after, be locked with stop screw then and initiatively manage on 2.

Fig. 2 is the total assembling structure of digital top board monitoring alarm device.

In Fig. 2, the title of each parts is among casing 16(Fig. 1 6), among extension bar 17(Fig. 1 7), among adjustable pipe 18(Fig. 1 1), among Universal-head 19(Fig. 1 8), initiatively manage among 20(Fig. 1 2), spring conductor rod 21, guide rod 22, guiding reading dop 23, sleeve pipe 24, warning locating ring 25, trigger ring 26, split ring 27, spacing ring 28, pull bar 29 is adjusted in alarm, trigger and adjust scale 30, spring 31, tooth bar 32, nameplate 33, joint 34, locking nut 35, nut 36, chassis nut 37, sunk screw 38, flush end holding screw 39, half knob copper rivet (φ 2 * 4) 40, bullet pad 41, back-up ring 42.Universal-head 19 is installed in the top of complete machine, and the sphere cone structure can adapt to the top board that difference tilts, and it is rotated arbitrarily in the top board of different angle.Sleeve pipe 24 is contained in the periphery of adjustable pipe 18.Two of spring 31() be contained in casing 16 and initiatively manage in 20, and run through whole box body 16 and initiatively manage 20, main rising stablized and reset response.Like this design with install, its advantage is the length that spring 31 can be processed into needed permission, can reduce the initial pressure of spring 31 and end pressure is not poor.Spring conductor rod 21 is installed in casing 16 lower ends, plays the spring guide effect, connects two springs 31.Tooth bar 32 is housed in the casing 16, makes casing not fragile.Initiatively manage 20 and be connected with tooth bar 32 usefulness split rings 27, the collar extension of split ring 27 prevents that in the bottom of initiatively managing 20 outsides split ring 27 from coming off.

Job step of the present utility model (Fig. 2)

Digital top board monitoring alarm instrument is installed under the coal mine between the roof and floor.According to the height between the roof and floor, select suitable extension bar, thereby instrument firmly is installed between the roof and floor.The position of triggering ring 26 is adjusted scale 30 and is adjusted locking through triggering by the spacing ring 28 of warning positioner.That is to say according to needed alarming value, can adjust the position of triggering ring 26 arbitrarily, with the stop screw locking of spacing ring 28.When crushing, initiatively manage 20 and casing 16 do relative motion, trigger ring 26 and move with initiatively managing 20, when with the trigger switch (K among Fig. 4 of casing 16 ₂-1, K ₂When-2) touching mutually, warning circuit is connected, and realizes reporting to the police.When initiatively managing 20 motions, be fixed on tooth bar 32 drives of initiatively managing on 20 and be fixed on the potentiometer (W among Fig. 4 ₂) on gear rotate, convert the variation of displacement to changes in resistance.Adorn a little spring between gear and the potentiometer, can make tooth bar 32 and gear inosculation freely, avoid the jam phenomenon.

Circuit theory of the present utility model

Fig. 3 is the circuit theory of digital top board monitoring alarm instrument.Each of circuit partly as shown in phantom in Figure 3.It mainly is made up of displacement voltage translation circuit 43, ICL7107 integrated circuit 44, display 45, sound light alarming circuit 46, power supply 47, mu balanced circuit 48, voltage conversion circuit 49, warning and delaying circuit 50, under-voltage indication loop 51 etc.

In Fig. 3:

1. displacement voltage translation circuit 43 adopts the resistance-type displacement transducer.By potentiometer W ₁, W ₂, W ₃, resistance R ₆, R ₇, R ₈, R ₉, R ₁₀, R ₁₁, etc. composition.When crushing, be fixed on the tooth bar 32 of initiatively managing on 20 and move, the rotation of gear then changes potentiometer W ₂Resistance, displacement signal is transformed into the signal of telecommunication.W ₂Be a kind of slip formula precision linear potentiometer, be input as mechanical quantity (anglec of rotation Q _X), be output as resistance (R _X) the linear change element, three contact A, B, C are arranged, two fixed arm A, B and a travelling arm C end.The position that changes C changes the displacement l of input _XBe Q _X, then export U _ACChange linearly, that is: thereupon

Q _X=K ₁l _X(K ₁Be proportionality constant) ∵ R _X=K ₂Q ₂

∴U _AC＝ (E)/(R) ·R _X＝ (E)/(R) ·K ₂·K ₁·1 _X＝K1 _X

By detecting U _ACVoltage swing detect displacement l _XSize, and U _ACWith l _XBetween be linear relationship.U when travelling arm C contacts with fixed arm contact B _ACBe maximum, when travelling arm C contacts with fixed arm contact A, U _ACOutput voltage minimum (equalling zero).

Employing is by potentiometer W ₂, W ₃And resistance R ₁₀, R ₁₁The bridge circuit that constitutes.Play R when eliminating travelling arm C and sliding to fixed arm A end with this circuit _XThe non-vanishing measure error of bringing; Can both be in the time of simultaneously also can making this test instrumentation at an arbitrary position as starting point (l _X=0 point).

Two exits 30 of displacement voltage translation circuit ICL7107 integrated circuit and 31 pin provide precision higher constant voltage stream, thereby guarantee measuring accuracy.

2.ICL7107 integrated circuit 44 is by A/D conversion, shaping circuit, time-base oscillation, frequency dividing circuit, constitute with door, counter, constant pressure source etc.Adopt the high characteristics of integrated degree on the circuit.The A/D conversion is the displacement l that will obtain _XVoltage signal send into ICL7107, after detecting.On display 45, demonstrate actual displacement.This line construction is simple, and debugging is few.

3. display 45, adopt seven sections light-emitting diode displays, and model is 4-BS206.Every section drive current 4mA, luminous clear, brightness is big, be connected with 2 to 25 pin of ICL7107.

4. sound light alarming circuit 46 is made of sound circuit and light circuit.The light warning circuit is to be core with the NE555 integrated circuit, by resistance R ₁₂, R ₁₃, R ₁₄And capacitor C ₉The concussion at intermittence that is produced Deng the self-oscillation device of forming.Because output signal is less, is difficult to directly drive BD _1～3Three alarm lamps.So, add amplifier tube BG at the output of NE555 ₁, make alarm lamp that enough sudden strains of a muscle light of melting be arranged, the 0.75 second lamp in every interval is once bright, and bright 0.5 second of lamp is until warning.Audible alarm circuit adopts the KD9561 integrated circuit, and model is CMOS.It has four kinds of sound available, by changeover switch K ₄Finish.This circuit output end O/P meets power amplifier tube LM386, makes loudspeaker y send loud and clear chimes of doom.When the displacement that crushes reaches predefined dangerous deflection, promptly during alarm threshold, instrument sends 10 minutes sound, visual alarm simultaneously.

5. employing 6 saves the 1.5AH ickel-cadmium cells to power supply 47 and current-limiting resistance 3.5 Ω/35W epoxy encapsulation is an one for instrument carries.Be essential safe type, do not report to the police and to use continuously more than 72 hours that warning can be used 2 hours continuously.

Other is with charger in aboveground use.

6. mu balanced circuit 48 adopts integrated package 7805.Consider that instrument uses in the down-hole, mine, has selected rechargeable cell for use.Along with the prolongation of service time, terminal voltage will descend, and three ends of integrated package 7805 can be exported the DC voltage of 5V, and the variation with input voltage does not change.Capacitor C ₁₂Be output filtering.

7. voltage conversion circuit 49 adopts 7660 integrated circuits.ICL7107 integrated circuit 44 needs positive and negative two groups of power supplys.The effect of this circuit is to convert positive supply to precision higher negative supply, with the requirement of satisfying ICL7107 integrated circuit 44 required positive and negative two groups of power supplys, can save one group of negative supply.

8. warning and delaying circuit 50 is by resistance R ₂₀, capacitor C ₁₂, diode D ₂, with the door JC ₅, triode BG ₄, BG ₅(for multiple pipe), relay J R _CDeng composition.As alarm switch K ₂Closure, C ₁₂Charging, the length in charging interval is by R ₂₀Adjust.Become high potential, relay J conducting, J with 3 pin of door JC40118 ₂, J ₁Disconnect, stop to report to the police.This circuit charging capacitor is smaller, solves explosion-proof problem easily.

9. under-voltage indication loop 51 is to adopt 339 integrated circuits and resistance R ₂₅, R ₂₆, R ₂₇, R ₂₈, R ₂₉And capacitor C ₁₄, LED ₅Form.When supply voltage is lower than 6.3V, LED ₅Sudden strain of a muscle is melted, and represents under-voltage.

Claims (3)

1, the utility model is a kind of digital top board monitoring alarm instrument, it is by mechanical transmission structure part and digital demonstration of displacement and sound, optical alarm circuit is partly formed, it is characterized in that mechanical transmission structure is by adjustable pipe, initiatively manage, alarm lamp, display switch, the zeroing key, casing, extension bar, Universal-head, the warning positioner, displacement shows, loudspeaker, under-voltage indication, battery, the sound equipment options button, formations such as power switch, the warning positioner is by triggering ring, spacing ring, pull bar is adjusted in alarm, trigger and adjust the scale formation, circuit is partly mainly by the displacement voltage translation circuit, the ICL7107 integrated circuit, display, sound light alarming circuit, power supply, mu balanced circuit, voltage conversion circuit, warning and delaying circuit, compositions such as under-voltage indicating circuit.

2, a kind of digital top board monitoring alarm instrument according to claim 1 is characterized in that spring is contained in active pipe and the casing, and is applied in whole active pipe and the casing, and tooth bar is housed in the casing, between gear and the potentiometer little spring is housed.

3, a kind of digital top board monitoring alarm instrument according to claim 1 is characterized in that warning and delaying circuit is by resistance, electric capacity, diode, form with door, triode, relay etc.