CN204487037U - A kind of new type of electrode insulating box - Google Patents
A kind of new type of electrode insulating box Download PDFInfo
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- CN204487037U CN204487037U CN201520183063.5U CN201520183063U CN204487037U CN 204487037 U CN204487037 U CN 204487037U CN 201520183063 U CN201520183063 U CN 201520183063U CN 204487037 U CN204487037 U CN 204487037U
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Abstract
A kind of new type of electrode insulating box, comprise casing, casing is provided with rise key, down key, key and display unit are set, box house is provided with control circuit, control circuit comprises temperature detecting unit, CPU, performance element and control circuit provide the power circuit of dc source, the signal input part of CPU connects the signal output part of temperature detecting unit respectively and raises key, down key, the signal output part of key is set, the signal output part of CPU connects the signal input part of performance element and the signal input part of display unit respectively, performance element comprises the first triode, second triode and relay, first triode is all connected the coil of relay with the second triode.The utility model compact conformation, integrated level are higher, and in the process used, it is convenient to change, and can show the temperature in casing in real time, in order to avoid performance element breaks down, and can control the temperature of casing, ensures the constant of temperature.
Description
Technical field
The utility model belongs to welding rod auxiliary equipment field, is specifically related to a kind of new type of electrode insulating box.
Background technology
The existing detection system being applied to welding rod constant temperature case is all utilize bi-metal temperature to pop one's head in carry out the collection of data, and the data collected is compared with the temperature of setting through amplifying, and controls the break-make of hot plate silk according to comparative result.This kind of method does not solve problem system such as lead-in wire error compensation and amplifying circuit zero drift error etc., and causes high, and detection accuracy is low.
Along with the progress of technology, various new wlding constantly comes out, and some special wlding changes to temperature are more responsive, and traditional insulating box can not well ensure the constant of temperature, thus has a strong impact on welding quality.
Simultaneously traditional insulating box does not possess upgrade function and can only carry out integral replacing to equipment, and financial cost is high.
The existing insulating box being applied to other field, serviceability temperature sensor carries out the collection of data, and the data collected are input to single-chip microcomputer carry out com-parison and analysis, finally controls control circuit according to comparative result, determines the break-make of electric furnace silk.
But the circuit of this form is in the process used, relay and triode damage very fast, need often to change, on the one hand because the less replacing of triode is got up cumbersome, on the other hand when relay is damaged replacing, selecting of relay of the current limit of triode, each of which increases operation cost, and when control circuit breaks down, easily occur the uncontrolled situation of electric furnace silk, bring harm to production.
Utility model content
The utility model aims to provide a kind of long service life, new type of electrode insulating box easy to maintenance.
For solving the problems of the technologies described above, the utility model provides following technical scheme: a kind of new type of electrode insulating box, comprise casing, innovation of the present utility model is: casing is provided with rise key, down key, key and display unit are set, box house is provided with control circuit, control circuit comprises temperature detecting unit, CPU, performance element and power circuit, the signal input part of CPU connects the signal output part of temperature detecting unit respectively and raises key, down key, the signal output part of key is set, the signal output part of CPU connects the signal input part of performance element and the signal input part of display unit respectively, performance element comprises the first triode, second triode and relay, first triode is all connected the coil of relay with the second triode, the normally opened contact of relay is connected in the control circuit of electrical heating wire, CPU is also connected with reset circuit and clock circuit, power circuit provides dc source for control circuit.
Described first triode and the second triode are PNP type triode, the base stage of the first triode and the second triode is connected the signal output part of CPU by the second resistance, first triode is all connected with dc source with the emitter stage of the second triode, the colelctor electrode of the first triode is all connected the first end of the coil of relay with the colelctor electrode of the second triode, the two ends of the normally opened contact of the second end grounding relay of the coil of relay connect the 11 binding post and the 12 binding post respectively, 11 binding post connects AC power, 12 binding post connects the coil of A.C. contactor, the normally opened contact of A.C. contactor is connected in the series circuit of AC power and electrical heating wire.
Described performance element also comprises diode, and the negative pole of diode connects the colelctor electrode of the first triode and the colelctor electrode of the second triode, the plus earth of diode respectively.
Described first triode and the second triode are NPN type triode, the base stage of the first triode and the second triode is connected the signal output part of CPU by the second resistance, first triode is connected dc source with the colelctor electrode of the second triode, the emitter stage of the first triode is all connected the first end of the coil of relay with the emitter stage of the second triode, second end ground connection of the coil of relay, normally opened contact one end of relay connects the 11 binding post, the other end connects the 12 binding post, 11 binding post connects AC power, 12 binding post connects the coil of A.C. contactor, the normally opened contact of A.C. contactor is connected in the series circuit of AC power and electrical heating wire.
Described performance element also comprises diode, and the negative pole of diode connects the emitter stage of the first triode and the emitter stage of the second triode, the plus earth of diode respectively.
Described temperature detecting unit comprises numeric type temperature sensor and the first resistance, the digital signal output end of numeric type temperature sensor connects the signal input part of CPU, the digital signal output end of numeric type temperature sensor also connects dc source by the first resistance, the power input of numeric type temperature sensor connects dc source, the earth terminal ground connection of numeric type temperature sensor.
Described display unit comprises exclusion, display screen and the first slide rheostat, the signal input part of display screen connects the signal output part of CPU and the pin of exclusion respectively, the common pin of exclusion connects dc source, the common end grounding of display screen, power supply signal input connects dc source, the setting contrast end of display screen connects sliding end and one end of the first slide rheostat, the other end ground connection of the first slide rheostat.
Clock circuit comprises the first electric capacity, the second electric capacity and crystal oscillator, and the first electric capacity and the first end of the second electric capacity are connected the two ends of crystal oscillator and two oscillator signal inputs of CPU respectively, the second end ground connection of the first electric capacity and the second electric capacity.
Reset circuit comprises reset key, variable capacitance, the 3rd resistance and the 4th resistance, 3rd resistance and the first end of the 4th resistance are connected the reset signal input of CPU and the movable electrode of variable capacitance respectively, the fixed electrode of variable capacitance connects dc source, second end of the 3rd resistance connects dc source by reset key, the second end ground connection of the 4th resistance.
Power circuit comprises bridge rectifier, voltage-stablizer, metal-half conduit rectifying tube, inductance and second have polar capacitor, the input of bridge rectifier connects AC power, the positive output end of bridge rectifier connects the Input voltage terminal of voltage-stablizer, the negative output terminal ground connection of bridge rectifier, the positive output end of bridge rectifier also has polar capacitor ground connection by first, the output end of pressure-stabilizing of voltage-stablizer connects the first end of inductance and the negative pole of metal-half conduit rectifying tube, second end of inductance connects the 13 binding post, the positive pole of metal-half conduit rectifying tube connects the negative plate that second has polar capacitor, second has the positive plate of polar capacitor to connect dc source and the 13 binding post, the second negative plate also ground connection having a polar capacitor, dc source is also successively by the second slide rheostat, 5th resistance eutral grounding, the feedback end of voltage-stablizer is by the 5th resistance eutral grounding, 13 binding post is DC power anode output, the cathode output end of dc source is the 14 binding post, 14 binding post ground connection.
By above technical scheme, the beneficial effects of the utility model are: 1, the utility model element is compact, integrated level is high, employ multiple binding post, thus facilitate replacing when element failure in the process connected; 2, the utility model has selected model to be that the numeric type temperature sensor of DS18B20 can well solve problem such as lead-in wire error compensation and amplifying circuit zero drift error etc., and there are TH, TL two registers numeric type temperature sensor inside, can stocking system setting bound temperature value, use simple, convenient; 3, selected two triodes, the supply electric current of relay can have been increased on the one hand, guarantee that, when existing relay breaks down, the relay of follow-up replacing only need consider voltage, ensure that the convenience of replacing; On the other hand, two triodes of setting can when a triode breaks down, the normal operation of another control circuit that works independently; 4, the display circuit arranged can when executive circuit breaks down, according to the break-make of the temperature manual control electrical heating wire of display; 5, in a power by selecting slide rheostat, achieving Width funtion and exporting, improve range of application, facilitate follow-up equipment upgrading.
Accompanying drawing explanation
Fig. 1 is the utility model theory diagram;
Fig. 2 is embodiment 1 circuit theory diagrams;
Fig. 3 is display unit schematic diagram;
Fig. 4 is power circuit principle figure.
Detailed description of the invention
Embodiment 1, a kind of new type of electrode insulating box, comprise casing, welding rod is positioned over box house, be provided with electrical heating wire at box house and control the control circuit of electrical heating wire break-make, the break-make being controlled electrical heating wire by control circuit ensure that the constant of the temperature of box house, casing is provided with and raises key, down key, arranges key and display unit.
As shown in Figure 1, control circuit comprises CPU, temperature detecting unit, performance element, key circuit and provides the power circuit of dc source for control circuit.Temperature detecting unit is for detecting the temperature of box house, the signal output part of temperature detecting unit connects the signal input part of CPU, the signal input part of CPU also connects the signal output part raising key, down key and arrange key, the signal output part of CPU connects the signal input part of performance element and the signal input part of display unit respectively.Controlled the break-make of electrical heating wire by performance element, shown the temperature in casing by display unit in real time.In order to ensure the normal work of CPU, CPU is also connected with peripheral circuit: reset circuit and clock circuit.
The one end of raising key S1 connects the signal input part (pin P2.5) of single-chip microcomputer U1, other end ground connection; One end of down key S2 connects the signal input part (pin P3.6) of single-chip microcomputer U1, other end ground connection; The one end arranging key S3 connects the signal input part (pin P3.7) of single-chip microcomputer U1, other end ground connection.Press after key S3 is set, press rise key S1 and can adjust limes superiors, press down key S2 and can adjust limit inferior, thus according to circumstances limiting temperature is adjusted.Adjusting high-low limit by key circuit, have a wide range of applications in daily life, is the prior art of maturation.
As shown in Figure 2, temperature detecting unit detects the temperature in casing in real time, comprising numeric type temperature sensor U2(model is DS18B20), (model is AT89C52 to the signal input part of digital signal output end (pin 2) the connection single-chip microcomputer U1 of numeric type temperature sensor U2, pin P2.2), thus the temperature collected is transferred in single-chip microcomputer U1 carries out analyzing, judging; The digital signal output end of numeric type temperature sensor U2 also connects dc source by the first resistance R1, and the power input (pin 3) of numeric type temperature sensor U2 connects dc source, earth terminal (pin 1) ground connection of numeric type temperature sensor U2.Model is selected to be that the numeric type temperature sensor of DS18B20 can well solve problem such as lead-in wire error compensation and amplifying circuit zero drift error etc. in the present embodiment, and there are TH, TL two registers numeric type temperature sensor inside, can stocking system setting bound temperature value, use simple, convenient.
Performance element comprises the first triode Q1, the second triode Q2 and relay R A, the model of the first triode Q1, the second triode Q2 is PNP, the signal output part (pin P2.3) of single-chip microcomputer U1 connects one end of the second resistance R2, and the other end of the second resistance R2 connects the base stage of the first triode Q1 and the second triode Q2; First triode Q1 is all connected dc source with the emitter stage of the second triode Q2, one end of the coil of collector connection relay RA, the other end ground connection of the coil of relay R A, the colelctor electrode of the first triode Q1 and the second triode Q2 is also connected with the negative pole of diode D1, the plus earth of diode D1.In being connected diode D1 can preventing the first triode Q1 and the second triode Q2 from ending on the colelctor electrode of the first triode Q1 with the second triode Q2, the impact that the induced electromotive force that the coil of relay R A produces causes the first triode Q1 and the second triode Q2, improves the life-span of the first triode Q1 and the second triode Q2.The two ends of the normally opened contact of relay R A connect the 11 binding post J11 and the 12 binding post J12 respectively, 11 binding post J11 connects AC power, 12 binding post J12 connects coil one end of A.C. contactor, the other end ground connection of the coil of A.C. contactor, the normally opened contact of A.C. contactor is connected in the series circuit of AC power and electrical heating wire.Connect the supply electric current that two triodes can increase relay on the one hand in this circuit arrangement, guarantee that, when existing relay breaks down, the relay of follow-up replacing only need consider voltage, ensure that the convenience of replacing; On the other hand, two triodes of setting can when a triode breaks down, the normal operation of another control circuit that works independently.
When single-chip microcomputer U1 detects that temperature in casing is lower than setting value, in the signal output part output low level of single-chip microcomputer U1, the first triode Q1 and the second triode Q2 conducting, the coil electricity of relay R A, the normally opened contact of relay R A closes; The coil electricity of A.C. contactor, the normally opened contact of A.C. contactor closes, thus electrical heating wire is heated, and improves the temperature in casing; When the temperature that single-chip microcomputer U1 detects in casing is equal with design temperature, the signal output part of single-chip microcomputer U1 exports high level, controls the disconnection of electrical heating wire.
As shown in Figure 2, for ensureing the normal work of single-chip microcomputer U1, single-chip microcomputer U1 is connected with clock circuit, and clock circuit is made up of crystal oscillator CZ, the first electric capacity C1 and the second electric capacity C2.
Reset circuit is used for the reset when program sideslip appears in single-chip microcomputer U1, comprises reset key S4, variable capacitance BC, the 3rd resistance R3 and the 4th resistance R4; 3rd resistance R3 and the first end of the 4th resistance R4 are connected the reset signal input (pin is RST) of single-chip microcomputer U1 and the movable electrode of variable capacitance BC respectively, the fixed electrode of variable capacitance BC connects dc source, second end of the 3rd resistance R3 connects dc source by reset key S4, the second end ground connection of the 4th resistance R4.
Display circuit is used for real-time displays temperature, thus when performance element breaks down, by the break-make of display circuit manual control electrical heating wire.As shown in Figure 3, it is 1602 that display circuit comprises display screen LCD1(model), the signal input part (DB0-DB7) of display screen LCD1 connects the first to the 8th binding post (J1-J8) respectively, first to the 8th binding post (J1-J8) connects the signal output part (pin P0.0-P0.7) of single-chip microcomputer U1, and the testing result of numeric type temperature sensor U2 is transported to display screen LCD1 and shows by single-chip microcomputer U1.Data/command selection the end (pin RS) of display screen LCD1 connects the 9th binding post J9,9th binding post J9 connects the signal output part (pin P3.5) of single-chip microcomputer U1, thus export low and high level by single-chip microcomputer U1, carry out the write of order and the write of information; The Enable Pin (pin E) of display screen LCD1 connects the tenth binding post J10, tenth binding post J10 connects the signal output part (P3.4) of single-chip microcomputer U1, thus export low and high level by single-chip microcomputer U1, make display screen LCD1 read information and show normally carrying out of information.In order to ensure the normal work of display screen LCD1, the signal input part (DB0-DB7) of display screen LCD1 is also connected with the pin (pin 2-9) of exclusion RP, and the common pin of exclusion RP connects dc source.Common port (pin GND) ground connection of display screen, power supply signal input (pin VCC) connects dc source, the setting contrast end (pin VO) of display screen LCD1 connects sliding end and one end of the first slide rheostat RB1, the other end ground connection of the first slide rheostat RB1, the luminosity of display screen LCD1 can be changed by the slide plate of the first slide rheostat RB1 that slides, thus adapt to use on-the-spot light conditions.
As shown in Figure 4, power circuit is used for providing dc source for the normal operation of control circuit, comprising the bridge rectifier BG, the voltage-stablizer U3(model that are made up of 4 diodes is LM2576), the input (pin 2,4) of bridge rectifier BG connects ac power output PI, the positive output end (pin 3) of bridge rectifier BG connects the Input voltage terminal (pin VIN) of voltage-stablizer U3, the positive output end (pin 3) of bridge rectifier BG also has polar capacitor CJ1 ground connection by first, negative output terminal (pin 1) ground connection of bridge rectifier BG.The output end of pressure-stabilizing (pin is OUT) of voltage-stablizer U3 connects the first end of inductance L 1 and the negative pole of metal-half conduit rectifying tube DJ respectively, the positive pole of metal-half conduit rectifying tube DJ connects the negative plate that second has polar capacitor CJ2, the second negative plate also ground connection having a polar capacitor CJ2, second has the positive plate of polar capacitor to be connected dc source and the 13 binding post J13 respectively with the second end of inductance L 1.Dc source, successively by the second slide rheostat RB2, the 5th resistance R5 ground connection, is selected the second slide rheostat to improve herein and is achieved Width funtion output, improve the scope of application of power circuit.The feedback end (pin FB) of voltage-stablizer U3 is by the 5th resistance R5 ground connection.13 binding post J13 is DC power anode output, and the cathode output end of dc source is the 14 binding post J14, the 14 binding post J14 ground connection.AC power has by the 13 binding post J13 and the 14 binding post J14 output dc source after polar capacitor CJ1 and voltage-stablizer U3, for the use that control circuit normally works through bridge rectifier BG, first successively.
In the process of work, numeric type temperature sensor U2 is for detecting the temperature in casing, and the signal detected is input in single-chip microcomputer U1, by key circuit, upper and lower temperature extremes is adjusted, single-chip microcomputer U1 is according to the temperature signal of input, after comparing with upper and lower temperature extremes, export control signal and control performance element, display unit shows the temperature in casing in real time by display screen LCD1.
The utility model compact conformation, integrated level are higher, in the process used, in the process connected, have selected multiple binding post, it is convenient to change, and can show the temperature in casing in real time, in order to avoid performance element breaks down, and can control the temperature of casing, ensure the constant of temperature.
Embodiment 2, the model of the first triode Q1, the second triode Q2 is NPN, first triode Q1 is all connected dc source with the colelctor electrode of the second triode Q2, emitter stage is connected with the negative pole of diode D1, first triode Q1 is also connected one end of the coil of relay R A with the emitter stage of the second triode Q2, the other end ground connection of the coil of relay R A.In the process used, when needs heat, the signal output part of single-chip microcomputer U1 exports high level, first triode Q1, the second triode Q2 conducting, the coil electricity of relay R A, normally opened contact closes, the coil electricity of A.C. contactor, the normally opened contact of A.C. contactor closes, electrical heating wire electrified regulation.Other content of the present embodiment is with embodiment 1.
Claims (10)
1. a new type of electrode insulating box, comprise casing, it is characterized in that: casing is provided with rise key, down key, key and display unit are set, box house is provided with control circuit, control circuit comprises temperature detecting unit, CPU, performance element and power circuit, the signal input part of CPU connects the signal output part of temperature detecting unit respectively and raises key, down key, the signal output part of key is set, the signal output part of CPU connects the signal input part of performance element and the signal input part of display unit respectively, performance element comprises the first triode, second triode and relay, first triode is all connected the coil of relay with the second triode, the normally opened contact of relay is connected in the control circuit of electrical heating wire, CPU is also connected with reset circuit and clock circuit, power circuit provides dc source for control circuit.
2. new type of electrode insulating box as claimed in claim 1, it is characterized in that: described first triode and the second triode are PNP type triode, the base stage of the first triode and the second triode is connected the signal output part of CPU by the second resistance, first triode is all connected with dc source with the emitter stage of the second triode, the colelctor electrode of the first triode is all connected the first end of the coil of relay with the colelctor electrode of the second triode, second end ground connection of the coil of relay, the two ends of the normally opened contact of relay connect the 11 binding post and the 12 binding post respectively, 11 binding post connects AC power, 12 binding post connects the coil of A.C. contactor, the normally opened contact of A.C. contactor is connected in the series circuit of AC power and electrical heating wire.
3. new type of electrode insulating box as claimed in claim 2, it is characterized in that: described performance element also comprises diode, the negative pole of diode connects the colelctor electrode of the first triode and the colelctor electrode of the second triode, the plus earth of diode respectively.
4. new type of electrode insulating box as claimed in claim 1, it is characterized in that: described first triode and the second triode are NPN type triode, the base stage of the first triode and the second triode is connected the signal output part of CPU by the second resistance, first triode is connected dc source with the colelctor electrode of the second triode, the emitter stage of the first triode is all connected the first end of the coil of relay with the emitter stage of the second triode, second end ground connection of the coil of relay, normally opened contact one end of relay connects the 11 binding post, the other end connects the 12 binding post, 11 binding post connects AC power, 12 binding post connects the coil of A.C. contactor, the normally opened contact of A.C. contactor is connected in the series circuit of AC power and electrical heating wire.
5. new type of electrode insulating box as claimed in claim 4, it is characterized in that: described performance element also comprises diode, the negative pole of diode connects the emitter stage of the first triode and the emitter stage of the second triode, the plus earth of diode respectively.
6. the new type of electrode insulating box as described in claim 2 or 5, it is characterized in that: described temperature detecting unit comprises numeric type temperature sensor and the first resistance, the digital signal output end of numeric type temperature sensor connects the signal input part of CPU, the digital signal output end of numeric type temperature sensor also connects dc source by the first resistance, the power input of numeric type temperature sensor connects dc source, the earth terminal ground connection of numeric type temperature sensor.
7. new type of electrode insulating box as claimed in claim 6, it is characterized in that: described display unit comprises exclusion, display screen and the first slide rheostat, the signal input part of display screen connects the signal output part of CPU and the pin of exclusion respectively, the common pin of exclusion connects dc source, the common end grounding of display screen, power supply signal input connects dc source, the setting contrast end of display screen connects sliding end and one end of the first slide rheostat, the other end ground connection of the first slide rheostat.
8. new type of electrode insulating box as claimed in claim 7, it is characterized in that: clock circuit comprises the first electric capacity, the second electric capacity and crystal oscillator, first electric capacity and the first end of the second electric capacity are connected the two ends of crystal oscillator and two oscillator signal inputs of CPU respectively, the second end ground connection of the first electric capacity and the second electric capacity.
9. new type of electrode insulating box as claimed in claim 8, it is characterized in that: reset circuit comprises reset key, variable capacitance, the 3rd resistance and the 4th resistance, 3rd resistance and the first end of the 4th resistance are connected the reset signal input of CPU and the movable electrode of variable capacitance respectively, the fixed electrode of variable capacitance connects dc source, second end of the 3rd resistance connects dc source by reset key, the second end ground connection of the 4th resistance.
10. new type of electrode insulating box as claimed in claim 9, it is characterized in that: power circuit comprises bridge rectifier, voltage-stablizer, metal-half conduit rectifying tube, inductance and second have polar capacitor, the input of bridge rectifier connects AC power, the positive output end of bridge rectifier connects the Input voltage terminal of voltage-stablizer, the negative output terminal ground connection of bridge rectifier, the positive output end of bridge rectifier also has polar capacitor ground connection by first, the output end of pressure-stabilizing of voltage-stablizer connects the first end of inductance and the negative pole of metal-half conduit rectifying tube, second end of inductance connects the 13 binding post, the positive pole of metal-half conduit rectifying tube connects the negative plate that second has polar capacitor, second has the positive plate of polar capacitor to connect dc source and the 13 binding post, the second negative plate also ground connection having a polar capacitor, dc source is also successively by the second slide rheostat, 5th resistance eutral grounding, the feedback end of voltage-stablizer is by the 5th resistance eutral grounding, 13 binding post is DC power anode output, the cathode output end of dc source is the 14 binding post, 14 binding post ground connection.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520183063.5U CN204487037U (en) | 2015-03-30 | 2015-03-30 | A kind of new type of electrode insulating box |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520183063.5U CN204487037U (en) | 2015-03-30 | 2015-03-30 | A kind of new type of electrode insulating box |
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| CN204487037U true CN204487037U (en) | 2015-07-22 |
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| CN201520183063.5U Expired - Fee Related CN204487037U (en) | 2015-03-30 | 2015-03-30 | A kind of new type of electrode insulating box |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107854774A (en) * | 2017-10-25 | 2018-03-30 | 国家康复辅具研究中心 | A kind of wireless electro photoluminescence walk help system of plantar pressure feedback driving |
| CN110038862A (en) * | 2019-05-23 | 2019-07-23 | 厦门华厦学院 | A kind of tube cleaning arrangement |
-
2015
- 2015-03-30 CN CN201520183063.5U patent/CN204487037U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107854774A (en) * | 2017-10-25 | 2018-03-30 | 国家康复辅具研究中心 | A kind of wireless electro photoluminescence walk help system of plantar pressure feedback driving |
| CN107854774B (en) * | 2017-10-25 | 2021-03-09 | 国家康复辅具研究中心 | Wireless stimulation walking aid system driven by plantar pressure feedback |
| CN110038862A (en) * | 2019-05-23 | 2019-07-23 | 厦门华厦学院 | A kind of tube cleaning arrangement |
| CN110038862B (en) * | 2019-05-23 | 2023-12-26 | 厦门华厦学院 | Pipeline cleaning device |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150722 |