CN203422196U - Water leakage detection device - Google Patents
Water leakage detection device Download PDFInfo
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- CN203422196U CN203422196U CN201320306392.5U CN201320306392U CN203422196U CN 203422196 U CN203422196 U CN 203422196U CN 201320306392 U CN201320306392 U CN 201320306392U CN 203422196 U CN203422196 U CN 203422196U
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Abstract
The utility model discloses a water leakage detection device, which is characterized by comprising a frequency measurement probe and a single measurement probe, the frequency measurement probe is fixed at the cooperating part of a power shaft of a water pump and the pump body, and is provided with an exposed water contact surface, the water contact surface is provided with a frequency measurement electrode, the single measurement probe is fixed below the cooperating part of the power shaft and the pump body and in a locus formed by dripping of water, and is provided with a water containing box with an upward opening, the water containing box is internally provided with a water contact space collecting dripped leakage water, the water contact space is provided with a single measurement electrode detecting leakage water via a conductive mode, the frequency measurement electrode is connected with the frequency measurement module, the single measurement electrode is connected with the single measurement module, the frequency measurement module and the single measurement module are disposed in a control module capable of controlling a drive part where the power shaft is in. Through combination of the single measurement module and the frequency measurement module, the conclusion of water leakage detection of the water pump is more accurate and reliable. Through respective match with the suitable frequency measurement module and single measurement module, the water leakage of a vertical centrifugal type water pump can be accurately detected, and the conclusion is accurate and reliable.
Description
Technical field
The utility model relates to a kind of leakage inspector, specifically for centrifugal pump sealing leakage inspector partly.
Background technology
Centrifugal pump is widely used in water field, such as irrigation, industry, aquatic sports etc.Its structure is comparatively ripe, the spiral pump housing of an involute urve section normally, and its inner coaxial pump leaf is driven and is rotated, and water body is axially sucked and circumferentially discharged, and realizes the fast moving of water body.From its structure, pump leaf is that dead axle is matched with in the pump housing, the resident water body being extracted in pump leaf and pump housing space, and pump leaf need to be from the outside power that imports rotation of the pump housing to drive, conventional driver part is such as motor, internal combustion engine etc.So, consider the protection requirements such as insulation, protection against the tide, this class driver part often can not contact with water body, thus corresponding liquid sealing waterproof measure will inevitably be set on the pump housing, to protect the long-acting running of driver part.
In actual use, because pump leaf and the pump housing are movable cooperations, there is obvious sliding friction, so, for the parts of liquid sealing can be very fast because normal wear, abnormal burn into are surprisingly etc. former thereby lost efficacy, thereby cause the water body in the pump housing to be overflowed from drive axle position, meet accident.Based on this, be necessary to adopt leakage inspector to detect in real time the leakage situation of centrifugal pump, can determine on the one hand after water pump ordinary life reaches and change in time, also can find in time on the other hand because leaking of causing of fortuitous event, thereby evade unnecessary risk.But, consider the instability of this situation of leaking, common detection method can produce two extreme, excessively sensitive and judge that too early water pump packing lost efficacy, or more blunt to such an extent as to leak when serious and just warned.So, be necessary that development can accurately judge the pick-up unit of pump housing driving shaft, accurately and not can report or omit test result by mistake.
Utility model content
The defect that wrong report easily occurs or fail to report for above-mentioned existing centrifugal pump leakage inspector, the utility model proposes a kind of leakage inspector, and its technical scheme is as follows:
, it comprises:
Frequently probing head, is fixed on centrifugal pump pump housing outer wall, and around line shaft and the pump housing cooperation place of this water pump on this pump housing, this frequency probing head has one of exposure and touches the water surface, and this tactile water surface is provided with the frequency lateral electrode of electrically conducting manner detection leakage water body;
Single probing head, is fixed in the track of this line shaft and below, this pump housing cooperation place, water body drippage, has an opening up water holding box, has the tactile hydrospace of leaking water body of collecting drippage in this water holding box; In this tactile hydrospace, be provided with electrically conducting manner and detect the single electrode of surveying that leaks water body;
Wherein, described frequency is surveyed the frequency survey module that electrode connects ponding on this head of probing frequently of a judgement; Described single single module of surveying that electrode connects this list probing internal water accumulation of judgement of surveying; This frequently surveys module and single module of surveying is all arranged in the control module that can control this line shaft place driver part.
As the preferred person of the technical program, its improvement can be as follows:
In preferred embodiment, described frequency probing head comprises the substrate of a ring-type, and the described tactile water surface is positioned at the upper surface of this substrate, and this base lower surface is fixed in the described pump housing; It is the form of two conductor electrodes that described frequency is surveyed electrode, in donut mode, is distributed in the described tactile water surface.
In preferred embodiment, single survey electrode of described single probing head is the form of two conductor electrodes, is separated from each other in the vertical direction and is fixed on wall within described tactile hydrospace.
In preferred embodiment, described frequency is surveyed module and is comprised:
High-frequency model, is connected in one end of described frequency probing head;
Integration module, is connected in the other end of described frequency probing head, has the DC terminal that loads the integral result of its output after AC square wave current according to this frequency probing head; And
Frequently survey judge module, be connected in described DC terminal, there is the frequency survey control end of controlling described control module by described DC terminal level.
In preferred embodiment, described integration module comprises:
One comparer, this comparer negative input end connects one end of described frequency probing head, is connected to this comparator output terminal by a diode reverse simultaneously; This comparer positive input terminal connects a reference voltage;
Rectification branch road, comprises the commutation diode and the resistance that are in series; This commutation diode positive pole is connected in this comparer negative input end; Negative pole is connected with this resistance, and the other end of this resistance connects the input end of an integrating circuit;
The output terminal of described comparer is connected in the input end of described integrating circuit by a diode reverse.
In preferred embodiment, described single module of surveying comprises:
DC Module, is connected in one end of described single probing head;
List is surveyed judge module, is connected in the other end of described single probing head, has the single control end of surveying by control module described in the Current Control of described single probing head.
In preferred embodiment, between the described pump housing and driver part, there is gap; Described driver part has a retaining ring at this gap location towards the position of described frequency probing head, and this retaining ring is concave panel towards the one side of described frequency probing head, its projection on this tactile water surface described in its size covers.
In preferred embodiment, described driver part is motor, and described control module comprises:
Frequently survey relay K 1, be connected in described frequency and survey module, this is frequently surveyed relay K 1 break-make loop and wherein by fuse F1, is connected with the live wire in civil power ac input end one end, and the other end is directly connected with a wherein drive end of a contactor 100.
Single relay K 2 of surveying, is connected in described single module of surveying; Wherein, these single relay K 2 break-make loops of surveying are wherein connected with zero line by PTC, R8 one end, and the other end is connected with live wire by fuse F1.
Described contactor drive end wherein one end directly connects civil power zero line, and this contactor drive end other end directly connects surveys relay K 1 frequently, and frequently surveying between relay K 1 other end and civil power live wire is described fuse F1.This contactor input end also connects civil power two ac input ends, the current return of output termination motor 10.
In preferred embodiment, described in drive the motor of parts for exchanging, described control module comprises:
Frequently survey relay K 1, be connected in described frequency and survey module,
Single relay K 2 of surveying, is connected to described single module of surveying;
Earth leakage protective device, its input end is parallel to civil power two ac input ends, and output terminal is connected in the current return of motor and powers to motor.Wherein, this is frequently surveyed relay K 1 break-make loop and this list and surveys relay K 2 break-make loops and be in parallel, and is parallel to ac input end of this earth leakage protective device and with it between not collinear another ac output end.
The beneficial effect that the technical program is brought has:
1. this single combination of surveying module and frequently surveying module, can make the test result that leaks of water pump comparatively accurate, reliable.As long as use separate frequency probing head and single probing head, its suitable frequency of arranging in pairs or groups is separately surveyed module and single module of surveying, and the situation of leaking of vertical centrifugal pump clearly can be detected, and its conclusion accurately, reliably.
2. use the ac mode of high-frequency model can make frequently to survey the anti-polarization processing of module, the life-span and the sensitivity that have extended the head of probing frequently.
3. single module and frequency surveyed surveyed the separated mode of module and can be coordinated multiple control modes, comprises that relay opens circuit, contactor opens circuit, fusing, earth leakage protection etc., and control mode is various, and applicability is good.
Accompanying drawing explanation
Below in conjunction with accompanying drawing embodiment, the utility model is described in further detail:
Fig. 1 is the cut-open view of the utility model embodiment mono-pump housing 20 and driver part 10 sides;
Fig. 2 is a cross section view in the pump housing 20 parts embodiment illustrated in fig. 1;
Fig. 3 is the schematic diagram of its control module 90 embodiment illustrated in fig. 1;
Fig. 4 is the partial function schematic diagram that Fig. 3 intermediate frequency is surveyed module 50;
Fig. 5 is single partial function schematic diagram of surveying module 60 in Fig. 3;
Fig. 6 is control module 90 schematic diagram of the utility model embodiment bis-.
Embodiment
Embodiment mono-:
As shown in Figures 1 to 5, some schematic diagram of the embodiment mono-of a kind of leakage inspector of the utility model.
In conjunction with Fig. 1 to Fig. 3, the present embodiment is the centrifugal water pump for a SPA pond.The pump housing 20 its driving shaft 11 horizontal positioned, therefore this example of driver part 10(is motor) and the pump housing 20 left and right apportions.Frequently the centrifugal pump pump housing 20 outer walls are fixed in probing 30, the bottom centre of pump seat 21, around the line shaft 11 and the pump housing 20 cooperation places of this water pump on this pump housing 20, this frequency probing head has one of exposure and touches the water surface, this tactile water surface is provided with lateral electrode 31 frequently, and this frequently surveys electrode 31 and adopts the mode of two conductive electrodes to detect leakage water body.The frequency measurement 30 residing positions of popping one's head in are positions very easily leaking of centrifugal pump.The pump housing 20 has formed centrifugal space by the critical piece that comprises pump seat 21 and pump cover 22, the position coordinating with line shaft 11 at pump seat 21 has shaft seal 23, even so, water leakage still can be overflowed from line shaft 11 outer wall gaps, flows to the tactile water surface of probing frequently 30.Frequently probing 30 comprises the substrate of a ring-type, and the tactile water surface is positioned at the upper surface of this substrate, and base lower surface is fixed the pump seat 21 in the pump housing 20; Frequently surveying electrode 31 is the form of two conductor electrodes, in donut mode, is distributed in the tactile water surface, and in vertical plane, to detect the probability leaking suitable for all directions, makes the sensitivity of probing frequently 30 more stable.
Separately have a single probing 40, it is fixed in the track of line shaft 11 and the pump housing 20 belows, cooperation places, water body drippage, has an opening up water holding box, has the tactile hydrospace 42 of the leakage water body of collecting drippage in this water holding box; In this tactile hydrospace 42, be provided with single electrode 41 of surveying, this single electrode 41 of surveying still detects and leaks water body with electrically conducting manner; It is also the form of two conductor electrodes that single probing 40 single surveys electrode 41, is separated from each other in the vertical direction, is fixed on and touches wall within hydrospace 42.This form is designed to single probing head the detection part of ponding type, different from above-mentioned frequency probing 30 is, frequently probing 30, for detecting in real time the situation of leaking, only has water body to leak and just can detect at once, and this single probing 40 is to leak to be accumulated to a certain amount ofly just can detect and obtain.If another because extraneous factor; there is large water gaging in product environment for use; because of single probing 40 aspect ratio product electrification in high voltage height low; so can effectively guarantee before product high-voltage charged body is soaked; single probing 40 has detected environment water; trigger single module 40 work protection products of surveying, this is the multiplexing function of single probing 40.
Frequently survey electrode 31 and connect one and survey module 50 frequently, this surveys module 50 frequently for judging the ponding situation in probing frequently 30; Similarly, single electrode 41 of surveying connects single modules 60 of surveying, and this list survey module 60 is for judging the ponding in this list probing 40; Frequently survey module 50 and be all arranged in a control module 90, the driver part 10 at the controlled braking mechanical axis of this control module 90 11 places with single module 60 of surveying.
In conjunction with Fig. 3 to Fig. 5, some details of the present embodiment control module have been shown.Frequently survey module 50 and comprise a high-frequency model 51, this high-frequency model 51, is connected in one end of probing frequently 30; An integration module 53 is connected in the other end of frequency measurement probe 30, integration module 53 is by the DC terminal of the integral result of its output after a frequency probing 30 loading AC square wave current, be directly connected in and survey judge module 54 frequently, this surveys judge module frequently according to the result of DC terminal, surveys control end connect the control circuit 55 of controlling rear class by frequency.The frequency of this form is surveyed the function that module 50 has anti-polarization, because frequently probing 30 go out the water surface, once frequently surveying the surface at electrode 31 places has deposited and has leaked, frequently survey between electrode 31 and can the long period there is electric current, consider that frequently surveying electrode 31 is all metal material conventionally, therefore, if survey electrode 31 frequently, adopt unidirectional direct current mode, can polarize gradually, to such an extent as to affect the sensitivity of electrode surface.Based on this, it is exactly to load on and frequently survey electrode 31 and carry out anti-polarization with alternating current that the frequency of the present embodiment is surveyed module 50, consider and frequently survey electrode 31 after water body being detected, its both end voltage and the current waveform passing through all change, therefore, use integrating circuit 53 to adapt to the electrode of exchange way work, thereby integration obtains direct current signal, determine its variation.This scheme can realize with multiple circuit, as long as possess, produces the high-frequency model 51 exchanging, integrating circuit 53 that can integration.As shown in Figure 4, the integration module 53 of the present embodiment comprises a comparer, and this comparer negative input end connects one end of probing frequently 30, simultaneously by a diode D6 Opposite direction connection to this comparator output terminal; This comparer positive input terminal connects a reference voltage, and this reference voltage comes from a base modules 52; Separately there is a rectification branch road, comprise the commutation diode D4 and the resistance R 25 that are in series; The positive pole of this commutation diode D4 is connected in this comparer negative input end; D4 negative pole is connected with this resistance R 25, and the other end of R25 connects the input end of an integrating circuit 56; The output terminal of comparer passes through a diode D5 Opposite direction connection in the input end of integrating circuit 56.This integration module 53 is simple in structure, can more accurately judge in frequently probing 30 that AC wave shape is because the variation of leaking and bringing.
As shown in Figure 5, the present embodiment single surveys module 60 and comprises that a DC Module 64 and singly surveys one end that judge module 62. DC Modules 64 are connected in single probing 40; Single survey the other end that judge module 62 is connected in single probing 40, this single judge module 62 of surveying is surveyed control end connection late-class circuit 63 in order to control control module 90 by list.Single probing of the present embodiment 40 can not work long hours, and only has in it liquid level accumulation to be elevated to single survey when electrode 41 can have electric current and just gives work, therefore by galvanic mode, judges and leaks.When single probing 40 internal water accumulation reach detection threshold, control function that can 90 pairs of driver parts 10 of trigger control module.
As shown in Figure 3, because the final driver part 10 of the technical program is motor, power supply 1 provides by the electric energy of all control modules 90 of rectification circuit 93, and is provided respectively and frequently surveyed module 50 and single power supply of surveying module 60 by the first regulator block 91 and the second regulator block 92.Control module 90 also comprises: frequently survey relay 51, be connected in and survey module 50 frequently; This break-make loop K1 that frequently surveys relay 51 is connected on a wherein drive end of live wire and contactor 100, single relay 61 of surveying, be connected in single module 60 of surveying, wherein, this list is surveyed relay K 2 break-make loops and is parallel to civil power two ac input end two ends, this single relay K 2 of surveying is wherein connected with zero line by PTC, R8 one end, and the other end is connected with live wire by fuse F1.
Visible, the control module of the present embodiment, it surveys the renewable type of module 50 for opening circuit frequently, when frequency probing 30 triggering, frequently survey after module 50, meaning has occurred to leak, and can cut off in time the current return of driver part 10, to start follow-up inspection work, after fixing a breakdown, re-power, can make frequently to survey relay 51 adhesive and working on again; On the other hand, single module 60 of surveying adopts the mode of short circuit to cut off fuse device F1, and fuse device F1 can be built in whole water pump, can form the pattern of be difficult for recovering, because the triggering of single probing 40, meaning is that leaking of whole water pump acquires a certain degree, or great accident, or life span, so, this single combination of surveying module 60 and frequently surveying module 50, can make the test result that leaks of water pump comparatively accurate, reliable.Visible, as long as use separate frequency probing 30 and single probing 40, arranging in pairs or groups separately, its suitable frequency is surveyed module 50 and list is surveyed module 60, the situation of leaking of vertical centrifugal pump clearly can be detected, trickle the leaking of real time monitoring water pump on the one hand, can judge by the mode of accumulation the integral body history of leaking on the other hand, its conclusion accurately, reliable.In addition, can in the current return of K2, set up PTC, realize overcurrent protection.
As Fig. 1, in the present embodiment, pump, 20 and driver part 10 between there is gap; Driver part 10 has a retaining ring 24 at this gap location towards the position of frequency probing 30, and this retaining ring 24 is concave panel towards the one side of frequency probing 30, and its size covers described its projection on this tactile water surface.This structure can make the water body flying out from gap be back to the tactile water surface to avoid test leakage on the one hand, and the water resistance of driver part 10 is provided on the other hand.
Embodiment bis-:
As shown in Figure 6, the schematic diagram of the utility model embodiment bis-.The motor of the final driver part 10 of the present embodiment for exchanging, its pump housing 20 structures etc. are identical with embodiment mono-.Different is in control module 90 parts.Control module 90 comprises equally frequently surveys relay 51 and single relay 61 of surveying, power supply 1, rectification circuit 93, the first regulator block 91 and the second regulator block 92; The present embodiment also comprises an earth leakage protective device 2, is series in the current return of whole control module 90 and the current return of driver part 10 (not indicating); Wherein, this break-make loop K2 that frequently surveys relay 51 break-make loop K1 and this list survey relay logical 61 is in parallel, and being parallel to ac input end of this earth leakage protective device 2 and with it between not collinear another ac output end---this scheme has been utilized the trigger mechanism of earth leakage protective device, similarly, when a little leaks, frequently survey module 50 and trigger K1 disconnection, cut-out work is in time in order to checking and recovering; Leak accumulation while transfiniting, and single module 60 of surveying triggers K2 and disconnects, fusing part F2 fusing simultaneously, so after, regardless of K1, again cannot recover easily, realized the separating treatment of the situation of leaking.
The above, it is only the utility model preferred embodiment, therefore can not limit according to this scope that the utility model is implemented, the equivalence of doing according to the utility model the scope of the claims and description changes and modifies, and all should still belong in the scope that the utility model contains.
Claims (9)
1. a leakage inspector, is characterized in that: comprising:
Frequently probing head, is fixed on centrifugal pump pump housing outer wall, and around line shaft and the pump housing cooperation place of this water pump on this pump housing, this frequency probing head has a tactile water surface of exposure, and this tactile water surface is provided with the frequency lateral electrode of electrically conducting manner detection of leaks water body;
Single probing head, is fixed in the track of this line shaft and below, this pump housing cooperation place, water body drippage, has an opening up water holding box, has the tactile hydrospace of leaking water body of collecting drippage in this water holding box; In this tactile hydrospace, be provided with by electrically conducting manner and detect the single electrode of surveying that leaks water body;
Wherein, described frequency is surveyed the frequency survey module that electrode connects ponding on this head of probing frequently of a judgement; Described single single module of surveying that electrode connects this list probing internal water accumulation of judgement of surveying; This frequently surveys module and single module of surveying is all arranged in the control module that can control this line shaft place driver part.
2. a kind of leakage inspector according to claim 1, is characterized in that: described frequency probing head comprises the substrate of a ring-type, and the described tactile water surface is positioned at the upper surface of this substrate, and this base lower surface is fixed in the described pump housing; It is the form of two conductor electrodes that described frequency is surveyed electrode, in donut mode, is distributed in the described tactile water surface.
3. a kind of leakage inspector according to claim 1, is characterized in that: it is the form of two conductor electrodes that described single probing head single surveys electrode, is separated from each other in the vertical direction and is fixed on wall within described tactile hydrospace.
4. a kind of leakage inspector according to claim 2, is characterized in that: described frequency is surveyed module and comprised:
High-frequency model, is connected in one end of described frequency probing head;
Integration module, is connected in the other end of described frequency probing head, has the DC terminal that loads the integral result of its output after AC square wave current according to this frequency probing head; And
Frequently survey judge module, be connected in described DC terminal, there is the frequency survey control end of controlling described control module by described DC terminal level.
5. a kind of leakage inspector according to claim 4, is characterized in that: described integration module comprises:
One comparer, this comparer negative input end connects one end of described frequency probing head, is connected to this comparator output terminal by a diode reverse simultaneously; This comparer positive input terminal connects a reference voltage;
Rectification branch road, comprises the commutation diode and the resistance that are in series; This commutation diode positive pole is connected in this comparer negative input end; Negative pole is connected with this resistance, and the other end of this resistance connects the input end of an integrating circuit;
The output terminal of described comparer is connected in the input end of described integrating circuit by a diode reverse.
6. a kind of leakage inspector according to claim 1, is characterized in that: described single module of surveying comprises:
DC Module, is connected in one end of described single probing head;
List is surveyed judge module, is connected in the other end of described single probing head, has the single control end of surveying by control module described in the Current Control of described single probing head.
7. a kind of leakage inspector according to claim 1, is characterized in that: between the described pump housing and driver part, have gap; Described driver part has a retaining ring at this gap location towards the position of described frequency probing head, and this retaining ring is concave panel towards the one side of described frequency probing head, its projection on this tactile water surface described in its size covers.
8. according to a kind of leakage inspector described in any one in claim 1 to 7, it is characterized in that: described driver part is motor, and described control module comprises:
Frequently survey relay K 1, be connected in described frequency and survey module, this is frequently surveyed relay K 1 break-make loop and wherein by fuse F1, is connected with the live wire in civil power ac input end one end, and the other end is directly connected with a wherein drive end of a contactor 100;
Single relay K 2 of surveying, is connected in described single module of surveying; Wherein, these single relay K 2 break-make loops of surveying are wherein connected with zero line by PTC, R8 one end, and the other end is connected with live wire by fuse F1;
Described contactor drive end wherein one end directly connects civil power zero line, and this contactor drive end other end directly connects surveys relay K 1 frequently, and frequently surveying between relay K 1 other end and civil power live wire is described fuse F1; This contactor input end also connects civil power two ac input ends, the current return of output termination motor 10.
9. according to a kind of leakage inspector described in any one in claim 1 to 7, it is characterized in that: described in drive the motor of parts for exchanging, described control module comprises:
Frequently survey relay K 1, be connected in described frequency and survey module;
Single relay K 2 of surveying, is connected to described single module of surveying;
Earth leakage protective device, its input end is parallel to civil power two ac input ends, and output terminal is connected in the current return of motor and powers to motor.Wherein, this is frequently surveyed relay K 1 break-make loop and this list and surveys relay K 2 break-make loops and be in parallel, and is parallel to ac input end of this earth leakage protective device and with it between not collinear another ac output end.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320306392.5U CN203422196U (en) | 2013-05-30 | 2013-05-30 | Water leakage detection device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320306392.5U CN203422196U (en) | 2013-05-30 | 2013-05-30 | Water leakage detection device |
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| CN203422196U true CN203422196U (en) | 2014-02-05 |
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| CN201320306392.5U Withdrawn - After Issue CN203422196U (en) | 2013-05-30 | 2013-05-30 | Water leakage detection device |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103454048A (en) * | 2013-05-30 | 2013-12-18 | 明达实业(厦门)有限公司 | Water leakage detection mechanism |
| CN103912794A (en) * | 2014-04-14 | 2014-07-09 | 华中科技大学 | Water seepage detecting system of de-ionized water cooling device |
| CN106595977A (en) * | 2016-12-16 | 2017-04-26 | 国家电网公司 | Equipment insulation oil leakage monitoring alarm apparatus |
| CN111189775A (en) * | 2020-02-17 | 2020-05-22 | 冠昊生物科技股份有限公司 | Biomembrane adhesion detection device and detection method |
-
2013
- 2013-05-30 CN CN201320306392.5U patent/CN203422196U/en not_active Withdrawn - After Issue
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103454048A (en) * | 2013-05-30 | 2013-12-18 | 明达实业(厦门)有限公司 | Water leakage detection mechanism |
| CN103454048B (en) * | 2013-05-30 | 2016-05-11 | 明达实业(厦门)有限公司 | The testing agency of leaking |
| CN103912794A (en) * | 2014-04-14 | 2014-07-09 | 华中科技大学 | Water seepage detecting system of de-ionized water cooling device |
| CN103912794B (en) * | 2014-04-14 | 2016-05-25 | 华中科技大学 | A kind of infiltration detection system of deionized water cooling device |
| CN106595977A (en) * | 2016-12-16 | 2017-04-26 | 国家电网公司 | Equipment insulation oil leakage monitoring alarm apparatus |
| CN111189775A (en) * | 2020-02-17 | 2020-05-22 | 冠昊生物科技股份有限公司 | Biomembrane adhesion detection device and detection method |
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Granted publication date: 20140205 Effective date of abandoning: 20160511 |
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