CN1003873B - Method and apparatus for monitoring weft insertion in a fluid jet loom - Google Patents

Abstract

In the present invention, the fluid pressure intensity on the jet fluid output end of every valve device is converted into an electric signal by the aid of a pressure intensity detecting element (for example, a piezoelectric element); unless all the electric signals transmitted from the pressure intensity detecting elements(connected with the valve devices) reaches a preset value, an alarm lamp is lighted, or a hooter is started, or the loom is stopped.

Description

The wefting insertion monitoring method and the device of fluid jet loom

The present invention relates to the fluid jet loom, control being used for that the jet fluid that parallel imports shed open is supplied with (as gas or water) with one or more valvings therein.More particularly, the present invention relates to be used to monitor the method and apparatus of the parallel guiding (also citing approvingly latitude) of this class loom.

In the gas jet loom, the parallel that penetrates from the wefting insertion main burner is introduced into the parallel guiding channel, this parallel guiding channel be by so-called improved reed or and the numerous parallel guide member put on slay determined.Be provided with a plurality of pilot jets along guiding channel, finish its operation or flight along guiding channel to help parallel.The running status of the parallel that is guided is by the decision of the guiding conditions of parallel in this way, the jet pressure of these conditions such as fluid or main burner or pilot jet synchronously.If these parallel guiding conditions are not carried out gratifying control, just can't in the wefting insertion process, avoid departing from the parallel guiding channel or in guiding channel, forming a wefting insertion fault that ring is such, thereby seriously reduce the quality of textiles such as parallel.

Therefore, need control the synchronous of main burner or pilot jet fluid jet, the kind of these essential conditions such as parallel or the width of cloth etc. according to main weaving condition.This control can by the control valve device open or close carry out synchronously, above-mentioned valving is used to control to the supply of the jet fluid of nozzle separately.This valve adjusted in concert is to carry out when the fluid pressure at nozzle place is tested.For example, announce announced in No. 87372/1980 such in disclosed Japanese Utility Model, the perforation hole of the top part of a tube connector that links to each other with a pressure sensor with pilot jet coupled together hermetically, valve opening is suitably regulated synchronously, so that shown pressure reaches the propradation that tends to peak state on the sensor, this peak state is positioned at the constantly corresponding loom angle of rotation place of the predetermined injection beginning of pilot jet.

Yet,, can not check in actual loom operation process therefore whether the fluid radiation is carried out in the intended manner owing to this open adjusted in concert can realize when loom seizes up.Therefore, when having adopted a valving to control the fluid ejaculation of pilot jet in the loom operation process, the number of wefting insertion mistake significantly increases.

For example, when the initial signal of magnetic solenoid disappears, or the noise signal (this noise signal is the signal except that initial signal) that adds when chance will produce this class fault of valving when causing solenoidal irregular working.The sliding shutter piston may be oxidized, thereby cause frictional resistance to increase, and then hinder valve to open reposefully and closed running, in a kind of machinery valve device, valve carries out the motion of forward stroke by a cam, and carries out motion in the backward stroke by a spring.In this machinery valve device, according to the state of oxidation of valve piston, sometimes, spring force can not make valve piston carry out return movement effectively.

Yet, from the obvious increase of wefting insertion number of errors infer failure cause be the running of one or more valvings not normal be very difficult, and be very time taking.

When air pressure probe being used for the open synchronous adjusting of nozzle (as mentioned above).The spray-hole of pilot jet stopped by the foremost part of pilot jet, thereby makes the radiation fluid pressure in the pilot jet reach maximum at short notice, and no matter the degree of opening of valve piston how.Therefore, on the basis that pressure sensor pressure shows, be exceedingly difficult, and require operating personnel to have superb technology open the adjusting synchronously of valve.

So at present needed is to find a kind of method and produce a kind of device, so that can be in the operation process of loom, the detecting unusually of convection cell pressure, and monitor to guarantee the best latitude state of leading leading latitude.

According to according to the latitude monitoring method of leading of the present invention, the jet fluid pressure conversion in valving exit is become the corresponding signal of telecommunication, and when this signal is lower than the value that presets, alarm just takes place, or stop the running of loom, above-mentioned valving is used to control the supply of radiation fluid, and above-mentioned radiation fluid is used to make parallel to enter shed open.

According to an optimum implementation of the present invention, change the injection fluid pressure that a plurality of valvings go out the stream end with the pressure detecting element just like piezoelectric transducer, and if not from all pressure detecting elements-these detecting elements with each valving interrelate-the signal of telecommunication all reach the value that presets, just start alarm lamp or steam whistle, perhaps stop the running of loom, the fluid that above-mentioned valving is used to control main burner or pilot jet is supplied with.

The pressure detecting element is set at the fluid transmitting terminal of valving, and is combined together so that obtain the signal of telecommunication with the terminals parts, and this valving is connected with the fluid conveyance conduit.When valving is opened,, thereby fluid pressure is acted on the detection part from the transmitting terminal of the jet stream direction of flow valving that enters the mouth.Therefore, by an oscilloprobe being connected on the terminals parts of detecting element, just can on oscillograph, obtain the switching electrical signals of fluid pressure, and, on this oscillograph, depict the opening and the closed function of jet fluid pressure curve as valving.

By the description of optimum implementation of the present invention being carried out below in conjunction with accompanying drawing, will more deep understanding be arranged to the present invention.In the accompanying drawings:

Fig. 1 is a perspective view, has shown the essential part that embodies jet fluid weaving machine of the present invention;

Fig. 2 is the cutaway view of a slay;

Fig. 3 is the longitudinal sectional view of the amplification of piezoelectric transducer and magnet valve door gear, and this piezoelectric transducer and this magnet valve door gear are used in the loom shown in Figure 1;

Fig. 4 and Fig. 5 are longitudinal sectional views, have shown two different distortion of valving;

Fig. 6 is the transverse sectional view along VI among Fig. 5-VI line;

Fig. 7 has shown a block diagram according to typical circuit of the present invention, and this typical circuit is used to monitor wefting insertion;

Fig. 8 (a) to (n) is a curve map, has shown the duty of the various piece of circuit;

Fig. 9 and 10 is block diagrams, has shown that these circuit are used to wefting insertion is monitored according to two different circuit example of the present invention.

Referring to Fig. 1 to Fig. 3, shown one embodiment of the invention among these figure, this embodiment is used to the machinery such as a gas jet loom.Referring to Fig. 1 to 3, numerous parallel guide member 3 is collocated on the slay 1, and it is relative with reed 2, and parallel Y is introduced into parallel guiding channel T, this parallel guiding channel T is determined by the guide groove 3a of row's parallel guide member 3, above-mentioned parallel relies on one forced air to carry, and this strand plus-pressure air-flow is provided by the parallel introducing main burner 4 that is installed on the slay 1.Between reed 2 and parallel guide member 3, a plurality of pilot jets 5 up are installed, these pilot jets 5 are along parallel guiding channel T, and install with fixing mutual spacing.Like this, the gas jet that provides of pilot jet 5 operation that helped parallel Y to pass parallel guiding channel T.Be mounted with a plurality of base components 6 on slay 1, these pedestals 6 are settled along straight line, and are all carrying the parallel guide member 3 of predetermined number and the pilot jet 5 of predetermined number on each pedestal 6.

Under slay 1, the jar 8, jars 7 and 8 that the jar 7 that is used for main burner is installed and is used for pilot jet 5 is used for storing pressurized gas.Between main burner 4 and jar 7, an electricity-magnet valve door gear 9 has been installed by rights, so that by influent stream carrier pipe 10, valving 9 with go out to flow carrier pipe 11 the jet fluid in the jar 7 is transported to main burner 4, charged into the gas-pressurized that transmits from fluid source in the jar 7, this fluid source is not revealed in the drawings.Similarly, between jar 8 that is connected with fluid source and pilot jet 5, electromagnetic valve device 12A, 12B, 12C and 12D are got up with base component 6, electricity-magnet valve door gear 12A, 12B, 12C and 12D are similar with valving 9 structurally.In the drawings, four such device 12A to 12D have been shown.Jet fluid in jars 8 is by influent stream carrier pipe 13, valving 12A to 12D and go out to flow carrier pipe 14 and be transported to pilot jet 5, going out to flow conveyance conduit 14 is connected with the fluid conduit systems 6a in the base component 6, this fluid conduit systems 6a then links with pilot jet 5, as shown in Figure 2.From the nearest valving 12A of distance main burner 4, valving 12A to 12D is synchronously open in order with the operation of parallel Y, so that make the jet fluid from being associated in, from pilot jet 5, emit periodically apart from the nozzle 5 on the nearest base component 6 of main burner.These nozzles 5 are that same base component 6 separately interrelates.

Because electricity-magnet valve door gear 9,12A, 12B, 12C have identical structure with 12D, so followingly only the valving 9 of main burner 4 is described.

As shown in Figure 3, valve body 16 is positioned among the shell 15, so that can be left and right-hand slip, valve body 16 is subjected to the bias effect of spring 17, this bias effect of spring 17 is along a direction that the fluid passage is closed that makes in the shell 15, and above-mentioned fluid passage is connecting influent stream carrier pipe 10 and going out to flow carrier pipe 11.With proper device cylindrical outer cover 18 is fixed on the left-hand end of shell 15, and solenoid 19 is installed on the interior circumferential surface of cylindrical outer cover 18.In cylindrical outer cover 18, a piston 20 has been installed, this piston 20 can slide along the direction identical with valve body 16.Piston hinged arm 20a leans against on the valve piston 16a of valve body 16.When solenoid 19 is subjected to encouraging, piston 20 is subjected to the attraction of fuse 21, thereby make piston hinged arm 20a cause that valve body 16 produces displacement, this displacement is to revolt the effect of spring 17, thereby come out in the fluid passage in the shell 15, solenoid 19 couples together with control device 41 by lead-in wire 9a, as shown in Figure 1.

In the present embodiment, tube connector parts 22 have been installed by going out in tube connector 11 and shell 15 between the circulation road, and the pressure detecting element, piezoelectric transducer 23 for example, install in the suitable window on the tube connector parts 22, so that make it to contact, or be connected with this fluid-transporting tubing with the fluid supplying passage in the tube connector parts.Be provided with pair of terminals parts 23a on the outer surface of piezoelectric transducer 23, this butted line end part 23a is connected with cable 23b, and the same display unit of cable 23b-for example oscillograph 40-is connected, as among Fig. 1 by way of example as shown in.

As shown in Figure 1, piezoelectric transducer 25A, 25B, 25C and 25D are linked on the electromagnetic valve device 12A to 12D in a similar fashion.And 12a to 12d is connected to these valvings 12A to 12D on the control device 41 by lead-in wire, as shown in Figure 1, although in the present embodiment, having adopted piezoelectric transducer to carry out pressure detects, and pressure change directly is converted into the corresponding signal of telecommunication, but the mode that also can be similar to piezoelectric transducer adopts limit switch, known devices among differential transformer or other prior aries, in the middle of these devices, the variation of pressure causes mechanical displacement, and mechanical displacement is converted into the corresponding signal of telecommunication.

The present invention also can be used for a kind of fluid jet type loom, has adopted the machinery valve device 24 shown in Fig. 4 to replace foregoing electricity-magnetic solenoid in this fluid jet type loom.In this distortion, head components 27 is screwedly mounted on the lower end of the shell 26 of valve body 25, the valve lever 25a that link to each other with valve part 25 stretch out downwards from head components 27.Spring 29 is installed between the lower end of spring space 28 and shell 26, spring space 28 is connected on the valve lever 25a in the head components 27, spring 29 applies active force along a certain direction, so that the fluid passage in the shell 26 is opened by valve body 25 or closure, above-mentioned fluid passage is connecting influent stream carrier pipe 35a and is going out to flow carrier pipe (as described later).In the lower end of valve lever 25a roller free to rotate 30 is installed, this roller 30 rests on the cam face of cam disc 33, and cam disc 33 is fixed on the driving shaft 31 by screw 32, and driving shaft 31 can synchronously rotate with the loom running.By means of screw 32, can the adjustment cam dish with respect to the installation site of driving shaft 31.Be screwed connection head components 34 in the upper end of shell 26, on the circumferential surface that connects head components 34, be screwed out stream carrier pipe 35b, going out to flow carrier pipe 35b links to each other with main burner or pilot jet again, below carrier pipe 35b, piezoelectric element 23 is installed in the suitable window that is arranged on the head components wall, so that directly be communicated with the fluid service duct among the carrier pipe 35b.Piezoelectric element 23 is provided with terminals parts 23a.

In the present embodiment, fluid in jet nozzle emission pressure curve is by the cam profile decision of camshaft disc 33.When needs are regulated with the relevant jet of the kind of the width of the cloth of being knitted or parallel when synchronous, the fastening degree that will change screw 32 is so that the established angle position of adjustment cam dish 33, by embodiment as the front, on oscillograph 40, obtain the signal of telecommunication from the existing jet pressure of the expression of piezoelectric transducer 23, just can be easy and realize this angle position adjustments exactly to cam disc 33.

Should be noted that the pressure detecting element such as piezoelectric transducer 23 can be installed on any position, as long as this installation site is the downstream that is positioned at valve body 25.Therefore, piezoelectric transducer can be installed among the guiding window 26a, and this guiding window 26a is set on the shell 26, rather than is set on the cover device 34.In addition, can also piezoelectric transducer be installed on the valving, but being installed on the pedestal of main burner 4, or be installed on the pedestal of a needed pilot jet 5, do not show this distortion in the drawings for easy.

Below in conjunction with accompanying drawing 1 to 3 and 7,8, illustrate that loom according to the present invention leads the latitude monitoring mode, above-mentioned loom has the structure shown in Fig. 1 to 3.Should be noted in the discussion above that having the parallel guiding of the loom of valve device structure shown in Figure 4 and 5, can be according to monitoring with the essentially identical mode of following described mode, this is very tangible for the people of the technical ability with present technique field.

In the loom operation process, valving 9 is synchronously opened with wefting insertion, so that launch fluid jet by main burner 4.This makes parallel Y be pushed away nozzle 4 and is introduced into parallel guiding channel T.In addition, front end operation synchronised with parallel Y, the device 12A to 12D of valve is under the control that control device 41 is carried out in a known way, from the nearest valving 12A of distance main burner 4, open according to priority, thereby make pilot jet 5 from the nearest nozzle 5 of distance main burner, launch fluid in order, by means of piezoelectric transducer 23 and 25A to 25D, valving 9 is become the corresponding signal of telecommunication with jet fluid pressure conversion among the 12A to 12D, these signals of telecommunication are sent in the circuit shown in Figure 7 by a cable, do not show above-mentioned cable among the figure, and this cable is different from the foregoing cable 23b that is connected with oscillograph 40.(a) of Fig. 8 shown the mode that these signals of telecommunication or fluid pressure change along with the instant angle of rotation of loom bent axle to (e).

As shown in Figure 7, put " I " (SET input from the signal of telecommunication of the representative fluid pressure of piezoelectric transducer 23 output by what filter amplifier 26 and discriminator circuit 27 were sent to flip-flop circuit F1.Discriminating or on-off circuit 27 are worked as signal S1 and are lower than reference level V ₀, just turn off switching signal S1, shown in Fig. 8 (a).Be added to " putting 1 " input of steady state multivibrator circuit F2 by filter amplifier 28 and discriminating or on-off circuit 29 from the switching electrical signals S2 of piezoelectric element 25A output.When signal S2 is lower than reference level V ₁The time, circuit 29 is just turned off switching electrical signals S2, shown in (b) among Fig. 8.From switching signal S3, the S4 of piezoelectric transducer 25B, 25C and 25D output and S5 respectively by with the same circuit of switching signal S2, promptly same with filter amplifier 28 and discriminator circuit 29 circuit is added to the set input of flop-over circuit F3, F4 and F5 respectively.

When the switching electrical signals S1 to S5 from piezoelectric transducer 23,25A to 25D is higher than reference level V ₀And V ₁The time, discriminator circuit 27 and 29 output signals, thereby make flip-flop circuit F1 to F5 output high level signal S6, S7, S8, S9 and S10, shown in Fig. 8 (g) to (k), and signal S6 to S10 is added on the NAND circuit 30, when the high level signal S10 from flip-flop circuit F5 is added on the NAND circuit 30, just be transformed into low level from the signal of circuit 30 outputs from high level, shown in (1) among Fig. 8, be introduced to AND gate circuit 31 from the signal of NAND circuit 30 outputs, and the signal of expression loom angle of rotation (shown in the P in Fig. 8 (f), below also be referred to as synchronizing signal) also be added on the AND gate circuit 31, this synchronizing signal is from sensor 32, this sensor 32 is used to detect the angle of rotation of loom, as traditional rotary encoder device, in the present embodiment, synchronizing signal P is output immediately after electricity-magnet valve door gear 12D closes.Therefore, the output signal level of AND gate circuit 31 is that the combination by the output signal of synchronizing signal P and bistable multivibrator F1 to F5 is determined, these output signals of flip-flop circuit F1 to F5 are to obtain after main burner 4 and pilot jet 5 emission fluids and the guiding termination to a parallel, when electricity-magnet valve door gear 9 and 12A to 12D normally turned round by method described above, NAND circuit 31 did not have signal output.

Be added to reset (RESET) end of flip-flop circuit F1 to F5 from the synchronizing signal P of sensor 32, at this moment, the output signal of these flip-flop circuits is switched to low level, as (g) among Fig. 8 to shown in (k).

For example, when valving 12C running not normal, thereby be lower than reference level V from the switching electrical signals S4 ' of sensor 25C ₁The time, the output signal S9 of flip-flop circuit F4 remains on low level, shown in (j) among Fig. 8.Like this, even when the output signal S10 of bistable multivibrator F5 is added on the NAND circuit 30, the output signal of NAND circuit 30 does not change yet, but remains on the high level, shown in (1) among Fig. 8.When being added to the synchronizing signal P from loom rotation angle sensor 32 on the AND gate circuit 31, just exported fault-signal St from circuit 31, represented as (m) among Fig. 8, fault-signal St is sent on the set input of flip-flop circuit F6.Flip-flop circuit F6 output alarm signal Sa consequently shown in Fig. 8 (n), and lights alarm lamp 33 by this signal Sa.Like this, when alarm lamp 33 was lighted, the work that operating personnel just are apprised of among valving 9 and the 12A to 12D was not normal, thereby just can set about eliminating the failure cause of valving 12C, and this fault can cause the wefting insertion mistake.

By operation push-button 34, flip-flop circuit F6 is resetted.

By this way, can be at any time in the present embodiment the operating condition of a plurality of electromagnetic valve devices of running up be checked, thereby can carry out correct control to the operating condition of electricity-magnet valve door gear, best wefting insertion operation just depends on this correct control.In other words, in the loom operation process, on the basis of valving real-world operation state, can at any time guarantee best wefting insertion.

As shown in figures 1 and 3, and as mentioned above, by lead-in wire 23b, the terminals parts of the piezoelectric transducer 23 of valving 9 and 12A to 12D are connected on the oscillograph 40.Suppose that the fluid pressure in tube connector 22 is converted to the corresponding signal of telecommunication by piezoelectric transducer 23 when oscilloprobe is connected with the terminal part 23a of the valving 12A shown in Fig. 1.This signal of telecommunication shows on oscillograph 40 with the form of emission fluid jet pressure curve C.In this way, can understand first and the beginning of last transition status, fluid radiation cycle, jet emission and stopping exactly, and at the fluid at pilot jet 5 places that valving 12A is controlled emission pressure, thereby the actual initial sum that can check the fluid emission of nozzle 5 stop whether to meet synchronously predetermined synchronously.If between the two, exist difference, can suitably revise in the control device 41 control program, thereby the fluid emission of determining this pilot jet exactly synchronously to electricity-magnet valve door gear 12A.Adopted this mode, can understand the emission of in the loom operation process of reality, presetting and how change synchronously.In addition, when being added to the electric control signal from control device 41 on electricity-magnet valve door gear 12A, whether opening and the closure state that just can understand valve body 16 carry out according to this electric control signal.

Also can measure the emission fluid pressure of other valving 12B to 12D similarly, and on the basis of comparing each fluid pressure curve, the effect of the jet fluid that the fluid that is identified for carrying out is in order launched is distributed, so that reduce the consumption of jet fluid as much as possible.

These various advantages all come from the pressure transducer that has adopted such as piezoelectric transducer 23, so that the corresponding signal of telecommunication that the fluid pressure at the transmitting terminal place of valving 9 and 12A to 12D is converted to.At first, piezoelectric transducer 23 is subjected to the influence of other factors beyond the fluid pressure minimum, these factors such as variation of temperature etc.Simultaneously, owing to needn't carry out the zero compensation of the signal of telecommunication to the emission synchro measure of launching nozzle each time, the operation of piezoelectric transducer 23 is very easy, in addition, the cost of piezoelectric transducer 23 is lower, a large amount of valvings is being used for the fluid jet loom and piezoelectric transducer 23 is being installed under the situation of each valving investment cost 〈 ﹠﹠ reduce.

Fig. 9 has shown a correction circuit of the present invention, and this circuit is used to monitor the operating condition of electromagnetic valve device of the present invention.In the present embodiment, switching electrical signals from piezoelectric transducer 23 and 25A to 25D is added to filter amplifier 35 and discriminator circuit 36 〈 ﹠﹠〉when the switching signal from sensor 23 and 25A to 25D is added on the circuit 36, circuit 36 just sends pulse signal, and this pulse signal is added on the counter circuit 37.For per five pulse signals that are added on the counter circuit 37, counter circuit 37 sends a high level signal, this high level signal is become low level signal by inverting amplifier 38 paraphase, this low level signal is added on the AND gate circuit 31, and the synchronizing signal from loom rotation angle sensor 32 is added on the AND gate circuit 31 sum counter circuit 37.At this moment, have only counter circuit 37 to be reset, * gate circuit 31 does not send output signal.

When one among valving 9 and the 12A to 12D running is not normal, have only four pulse signals to be added to counter circuit 37, and in the moment that synchronizing signal P takes place loom rotation angle sensor 32, two input signals of AND gate circuit 31 all are in high electric *.Therefore, circuit 31 sends high level signal to steady state multivibrator circuit F6, in order to light alarm lamp 33.

In the shown distortion of Figure 10, can connect each alarm lamp 33 with piezoelectric transducer 23 and 25A to 25D respectively, piezoelectric transducer 23 and 25A to 25D are valving * and 12A to 12D setting.

In this distortion, each flip-flop circuit F1 to F5 is with inverting amplifier 38, bistable multivibrator F6 shown among AND gate circuit 31 and Fig. 9 interrelates, the mode of its contact make when one in the middle of valving 9 and the 12A to 12D-for example install 12C-work not normal the time, just lighted with the alarm lamp 33 that valving 12C interrelates, adopt this method, just can promptly find the valving that breaks down.

In another distortion of the present invention, can adopt limit switch to replace piezoelectric transducer, when this limit switch surpasses predetermined value at fluid pressure, can open, thereby light alarm lamp or startup 〈 ﹠﹠ steam whistle, loom is shut down.

Although adopted the electromagnetic valve device in the described in front control circuit, but also can adopt the similar control circuit that interrelates with the machinery valve device to come the loom wefting insertion is monitored, above-mentioned machinery valve device can adopt cam shown in the Figure 4 and 5 and cam return idler.In addition, although the top description contact shuttleless loom that carries out carries out, and this shuttleless loom adopts gas-pressurized to push fluid as parallel, but add * as the occasion that pushes fluid in employing, (these methods are conspicuous for the people of the domain knowledge that possesses skills, and can realize the present invention too by adopting proper method.

Claims (10)

1, comprise valving and be used for carrying the fluid jet loom of the fluid supplying passage of jet fluid, be used to monitor the method for wefting insertion, be used for parallel is pushed to the supply of jet fluid of the open shed of warp by valving control at described fluid jet loom, described valving is by its fluid transmitting terminal output fluid, it is characterized in that the pressure detecting element is installed on the described fluid transmitting terminal of valving, and link with described fluid supplying passage, the jet fluid pressure conversion at valving fluid transmitting terminal place is become the signal of telecommunication, and when this signal of telecommunication is lower than predetermined value, give the alarm or stop loom running.

2, the parallel of fluid jet loom pushes the fluid pressure monitoring device, described loom includes a plurality of valvings of the supply that is used for the control jet fluid and is used to carry the fluid supplying passage of jet fluid, described valving comprises the fluid transmitting terminal that is used to export the jet fluid, this jet fluid is used to parallel is pushed in the open shed of warp, this fluid pressure monitoring device is characterised in that the described fluid transmitting terminal at valving is equipped with the pressure detecting element, this pressure detecting element is connected with described fluid supplying passage and is equipped with the terminals parts that are used to obtain the signal of telecommunication, and these terminals parts are coupled with failure detector circuit.

3,, it is characterized in that described pressure detecting element is installed in valving and between the conveyance conduit at the transmitting terminal place of this valving as the desired device of claim 2.

4,, it is characterized in that the pressure detecting element is a piezoelectric transducer as the desired device of claim 2.

5, as the desired device of claim 2, it is characterized in that failure detector circuit comprises: a plurality of identification devices that couple together independently with the described terminals parts pressure detecting element, these identification devices are used to differentiate the described signal of telecommunication that transmits from described terminals parts, and described identification device sends output signal when the described signal of telecommunication is higher than reference level; A plurality of bistable multivibrators that are connected with these identification devices independently, these bistable multivibrators are exported high level signal when receiving described output signal; Send fault signal circuit with what described bistable multivibrator linked to each other, unless all described bistable multivibrators all send high level signal, otherwise the described fault signal circuit that sends will send fault-signal.

6, as the desired device of claim 5, the described device that it is characterized in that being used for sending fault-signal comprises: the NAND circuit that is in series with described a plurality of bistable multivibrators; With the AND gate circuit that is in series with described NAND circuit.

7,, it is characterized in that being provided with a plurality of described fault-signal issue devices, and the same described bistable multivibrator separately of these described fault-signal issue devices is in series as the desired device of claim 5.

8, as the desired device of claim 2, it is characterized in that failure detector circuit comprises: the discriminator circuit that is connected with the terminals parts of pressure detecting element, this discriminator circuit is used to differentiate the described signal of telecommunication that sends from described terminals, and sends output signal when the described signal of telecommunication is higher than reference level; With the counter circuit that described discriminator circuit is connected, this counter circuit is used to count the number from the output signal of described discriminator circuit; With the device that described counter circuit is connected, be used for when Counter Value is inconsistent with the number of the signal of telecommunication, sending fault-signal.

9,, it is characterized in that described valving is a calutron as the desired device of claim 2.

10,, it is characterized in that valving is by cam and cam follower wheel drive systems as the desired device of claim 2.

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