CN2224414Y

CN2224414Y - Pocket gas-liquid leakage detecting instrument

Info

Publication number: CN2224414Y
Application number: CN 95208088
Authority: CN
Inventors: 阎科; 解海龙; 朱景文; 徐元哲; 王金铭
Original assignee: JILIN HEAT AND POWER PLANT; NORTHEAST CHINA ELECTRIC POWER COLLEGE; ZHONGNENG SCIENCE AND TECHNOLOGY DEVELOPMENT CORP DONGBEI ELECTRIC POWER INST
Current assignee: JILIN HEAT AND POWER PLANT; NORTHEAST CHINA ELECTRIC POWER COLLEGE; ZHONGNENG SCIENCE AND TECHNOLOGY DEVELOPMENT CORP DONGBEI ELECTRIC POWER INST
Priority date: 1995-04-18
Filing date: 1995-04-18
Publication date: 1996-04-10
Anticipated expiration: 2005-04-18

Abstract

The utility model relates to a pocket gas-liquid leakage detecting instrument, which relates to a pressure vessel, a pipeline, a valve or a negative pressure system. The pocket gas-liquid leakage detecting instrument is composed of a sound guide tube, an air sensor, a casing, a signal processor, a displayer, a separated charging power source and a laser emission positioner. The pocket gas-liquid leakage detecting instrument solves the problems of the inconvenient detecting of the gas and the liquid leakage of a low visibility or of a narrow space which human can not approach. The pocket gas-liquid leakage detecting instrument adopts technical measures which can insulate heat radiation. The pocket gas-liquid leakage detecting instrument with the advantages of small size and high precision can be held by the operator in hand to carried out detecting conveniently, and is especially suitable for the leakage detecting of boilers, steam engines, heat distribution pipelines and tube bundles of thermal power plants.

Description

Pocket gas, leak of liquid detector

The utility model relates to gas, the leak of liquid detector of a kind of pressure vessel, pipeline, valve or negative pressure system.

Existing gas, leak of liquid detector, adopt the diode displaying leakage signal of pointer instrument or negligible amounts, adopt the mode identified leakage signal of headphone monitor simultaneously, volume is big, and be not suitable for production scene, especially the tube bank gas in having high-temperature flue gas, the maccessiable narrow space of people, the Leak Detection of liquid of the lower or narrow space of visibility.

It is little that task of the present utility model provides a kind of volume, be convenient to the operator hand held in, only utilize human visual just can be lower in visibility or the testing environment of narrow space in clearly show pocket gas, the leak of liquid detector of faint leakage signal.

The utility model includes the bandwidth-limited circuit in housing, air borne sensor, the signal processor, characteristics are to be connected with amplifying circuit with bandwidth-limited circuit in the signal processor in housing, are connected with display with signal processor and acoustic conducting pipe, Laser emission steady arm and split type charge power supply constitute.Gather gas, the leak of liquid signal of pressure vessel, pipeline, valve or negative pressure system by acoustic conducting pipe, change electric signal into through air borne sensor and offer amplifying circuit, bandwidth-limited circuit in the signal processor, after amplifying circuit and detection are amplified, flow to display again.Electrochemical capacitor and digital dial plate lighting lamp group that display can adopt digital watch, steady ripple to use become.Display can also adopt as the light belt of visual identity leakage signal power and the oscillatory circuit in housing, pulsing circuit, reference voltage circuit, on-off circuit and driving circuit to be formed.Acoustic conducting pipe has straight tube acoustic conducting pipe and two kinds of forms of bend pipe acoustic conducting pipe, and acoustic conducting pipe is used for the testing environment in the maccessiable narrow space of human body, and the detection as pipeline in the burner hearth or tube bank leakage also has the effect that intercepts thermal radiation.The Laser emission steady arm cooperates the straight tube acoustic conducting pipe to be used for determining to detect the position of leakage point.Adopt split type charge power supply, can also adopt high-energy battery is power supply.

The utility model not only can effectively detect under strong background noise without interruption, and can use in the lower testing environment of visibility, and integrated degree height, volume are little, and the operator is detected in hand held easily; Adopt the bend pipe acoustic conducting pipe that the function that intercepts thermal radiation is arranged; Adopt the Laser emission steady arm, the luminous point that utilizes laser beam to form on testee is easy to determine the position of leakage point.The utility model is specially adapted to the Leak Detection of heat power plant boiler, steam turbine and pipeline, detects leakage point the previous day if a 600MW genset is carried, and calculating by 24 hours can multiple electricity 14.4 * 10 ⁶The degree electricity can increase by 3,600,000 yuan of the output values by 0.25 yuan of calculating of every degree electricity.

The utility model is described in further detail below in conjunction with accompanying drawing:

Fig. 1 is the utility model front schematic view;

Fig. 2 is the utility model air borne sensor, signal processor circuit figure;

Fig. 3 is that the utility model numeral shows the embodiment schematic block diagram;

Fig. 4 is the utility model light band display embodiment schematic block diagram;

Fig. 5 is 64 light band display embodiment circuit diagrams;

Fig. 6 is 100 light band display embodiment circuit diagrams;

Fig. 7 is the utility model Laser emission steady arm circuit diagram.

Referring to Fig. 1 and Fig. 2, the utility model is made of signal processor (see figure 2), display (3) and split type charge power supply (4) in acoustic conducting pipe (1), air borne sensor Y, housing (2), the housing and Laser emission steady arm (see figure 7).Acoustic conducting pipe (1) adopts metal or nonmetallic materials to make, and (1) two kind of straight tube acoustic conducting pipe (1) and bend pipe acoustic conducting pipe is arranged, and adopts dismantled and assembled mode to be connected on the housing (2), and the sag of bend pipe acoustic conducting pipe (1) is apart from least greater than the internal diameter size of acoustic conducting pipe (1); Housing (2) adopts engineering plastics to make; The signal processor (see figure 2) is made up of multipole amplifying circuit and bandwidth-limited circuit, multipole amplifying circuit is made up of resistance R 1-R3, R6-R15, diode D1-D2, capacitor C 1-C2 and C7, potentiometer P1-P2 and integrated circuit U1, U2, U3:A, U3:B, U3:D, bandwidth-limited circuit is made up of resistance R 4-R5, capacitor C 3-C6 and integrated circuit U3:C, wherein U1 adopts the LM741 circuit, U2 adopts the LF355 circuit, U3 adopts the LF347 circuit, and J is the interface of signal processor and display (3).

Referring to Fig. 3, display (3) adopts digital watch and electrochemical capacitor C8 composition that steady ripple is used of market sale, and (J) is connected with signal processor by interface, and digital dial plate illuminating lamp can be set, and is used for the lower testing environment of visibility.

Referring to Fig. 4, Fig. 5 and Fig. 6, display (3) is made up of oscillatory circuit, pulsing circuit (comprising step-by-step counting, pulse distribution), reference voltage circuit, on-off circuit (perhaps scanning switch circuit) and driving circuit in light belt and the housing (2) (comprise relatively drive and divide segment drive circuit); When light belt L1 adopted the LED64 circuit, the oscillatory circuit in housing (2) was made up of resistance R 16-R17, integrated circuit U4:C and U4:D and capacitor C 9; Pulsing circuit is to carry out step-by-step counting by integrated circuit U5, is undertaken by integrated circuit U6 that pulse distribution forms; Reference voltage circuit is made up of resistance R 18-R25, potentiometer P3; The scanning switch circuit is made up of integrated circuit U7; Driving circuit is to constitute the branch segment drive circuit by integrated circuit U8 and U4:A, U4:B, is made up of than driving circuit integrated circuit U9 and U10, resistance R 26-R32 constituent ratio; Wherein U4 and U8 adopt 4049 circuit, and U5 adopts 4520 circuit, and U6 adopts 4028 circuit, and U7 adopts 4097 circuit, and U9 and U10 adopt the LM324 circuit.When the light belt L2 of display (3) adopted the LED100 circuit, the oscillatory circuit in housing (2) was made up of integrated circuit U11, resistance R 33-R34, capacitor C 10, diode D3-D4; Pulsing circuit is made up of integrated circuit U12, is used for the counting and the distribution of pulse; Reference voltage circuit is made up of resistance R 35-R44; On-off circuit is made up of integrated circuit U13-U17; Driving circuit, is constituted the branch segment drive circuit by integrated circuit U19-U21 and forms than driving circuit by integrated circuit U18, resistance R 45-R46 constituent ratio; Wherein U11 adopts 4093 circuit, and U12 adopts 4017 circuit, and U13-U17 adopts 40107 circuit, and U18 adopts the LM3914 circuit, and U19-U21 adopts 4041 circuit.

Referring to Fig. 7, the Laser emission steady arm is made up of L3 semiconductor laser tube and dropping resistor R47, and the laser tube emitted light beams is used for the leakage point position of the lower testing environment of definite visibility by penetrating in the straight tube acoustic conducting pipe.

Split type charge power supply (4) is 9V, is connected with housing (2) in the mode of pegging graft.

Claims

1, a kind of pocket gas, leak of liquid detector that relates to pressure vessel, pipeline, valve or negative pressure system, include the bandwidth-limited circuit in housing (2), air borne sensor Y, the signal processor, it is characterized in that being connected with amplifying circuit with bandwidth-limited circuit in the signal processor in housing (2), be connected with display (3) with signal processor, and acoustic conducting pipe (1), Laser emission steady arm and split type charge power supply (4) constitute.

2, pocket gas according to claim 1, leak of liquid detector, it is characterized in that the amplifying circuit in the signal processor is multipole amplifying circuit, form by resistance R 1-R3, R6-R15, diode D1-D2, capacitor C 1-C2, C7, potentiometer P1-P2 and integrated circuit U1, U2, U3:A, U3:B, U3:D, U1 adopts the LM741 circuit, U2 adopts the LF355 circuit, and U3 adopts the LF347 circuit.

3, pocket gas according to claim 1, leak of liquid detector, it is characterized in that display (3) is made up of digital watch and electrochemical capacitor C8, be connected with signal processor, and be provided with the digital dial plate illuminating lamp that uses in than low environment in visibility.

4, pocket gas according to claim 1, leak of liquid detector is characterized in that what display (3) was made up of oscillatory circuit, pulsing circuit (comprising step-by-step counting and pulse distributor), reference voltage circuit, on-off circuit (perhaps scanning switch circuit) and driving circuit in light belt and the housing (2) (comprise the comparison driving circuit, divide segment drive circuit).

5, pocket gas according to claim 4, leak of liquid detector is characterized in that the light belt L1 of display (3) adopts the oscillatory circuit in LED64 circuit and the housing (2) to be made up of resistance R 16-R17, capacitor C 9 and integrated circuit U4:C and U4:D; Pulsing circuit carries out step-by-step counting and integrated circuit U6 by integrated circuit U5 and carries out pulse distribution and form; Reference voltage circuit is made up of resistance R 18-R25 and potentiometer P3; On-off circuit is made up of integrated circuit U7; Driving circuit is to constitute the branch segment drive circuit by integrated circuit U8 and U4:A and U4:B, form than driving circuit by integrated circuit U9 and U10 and resistance R 26-R32 constituent ratio, U4 and U8 adopt 4049 circuit, U5 adopts 4520 circuit, U6 adopts 4028 circuit, U7 adopts 4097 circuit, and U9 and U10 adopt the LM324 circuit.

6, pocket gas according to claim 4, leak of liquid detector is characterized in that the light belt L2 of display (3) adopts the oscillatory circuit in LED100 circuit and the housing (2) to be made up of integrated circuit U11, resistance R 33-R34, capacitor C 10 and diode D3-D4; Pulsing circuit is made up of integrated circuit U12, is used for the counting and the distribution of pulse; Reference voltage circuit is made up of resistance R 35-R44; On-off circuit is made up of integrated circuit U13-U17; Driving circuit be by integrated circuit U18 and resistance R 45-R46 constituent ratio than driving circuit, constitute the branch segment drive circuit by integrated circuit U19-U21 and form; U11 adopts Schmidt trigger 4093 circuit, and U12 adopts 4017 circuit, and U13-U17 adopts 40107 circuit, and U18 adopts the LM3914 circuit, and U19-U21 adopts 4041 circuit.

7, pocket gas according to claim 1, leak of liquid detector, it is characterized in that gathering the acoustic conducting pipe (1) that leakage signal uses adopts metal or nonmetallic materials to make, adopt removable connected mode with housing (2), be used for changing the acoustic conducting pipe (1) of different length and shape at different testing environments.

8, pocket gas according to claim 7, leak of liquid detector is characterized in that being furnished with straight tube acoustic conducting pipe (1) and bend pipe acoustic conducting pipe (1).

9, pocket gas according to claim 1, leak of liquid detector, it is characterized in that being assemblied in the interior Laser emission steady arm of housing (2) is made up of L3 semiconductor laser tube and dropping resistor R47, laser tube L3 emitted light beams is used for the leakage point position of the lower testing environment of definite visibility by penetrating in the acoustic conducting pipe (1).

10, pocket gas according to claim 1, leak of liquid detector is characterized in that the split type charge power supply (4) of housing (2) afterbody adopts inserting mode to be connected with housing (2).