CN108167658B - Detection system and detection method for detecting indoor pipeline leakage by using travel switch - Google Patents
Detection system and detection method for detecting indoor pipeline leakage by using travel switch Download PDFInfo
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- CN108167658B CN108167658B CN201810007055.3A CN201810007055A CN108167658B CN 108167658 B CN108167658 B CN 108167658B CN 201810007055 A CN201810007055 A CN 201810007055A CN 108167658 B CN108167658 B CN 108167658B
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- plunger
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- liquid inlet
- travel switch
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17D—PIPE-LINE SYSTEMS; PIPE-LINES
- F17D5/00—Protection or supervision of installations
- F17D5/02—Preventing, monitoring, or locating loss
- F17D5/06—Preventing, monitoring, or locating loss using electric or acoustic means
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- Engineering & Computer Science (AREA)
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- Steam Or Hot-Water Central Heating Systems (AREA)
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Abstract
The invention discloses a detection system for detecting indoor pipeline leakage by using a travel switch, which is connected to a floor heating system and comprises a controller, a liquid inlet valve arranged on a liquid inlet pipe, a liquid outlet valve on a liquid outlet main pipe and a plunger pressure maintaining assembly arranged between the liquid inlet valve and the liquid outlet valve, wherein the plunger pressure maintaining assembly comprises a plunger cylinder, a plunger and a spring, the plunger cylinder is provided with a communication hole communicated with a pipeline of the floor heating system, and a closed volume is formed between the plunger and the communication hole; the top of the plunger cylinder is provided with a stop piece, a spring is pre-tightened between the stop piece and the plunger, and an open volume communicated with the atmosphere is formed between the stop piece and the plunger; the invention also discloses a floor heating pipeline leakage detection method. The invention has the advantages of high detection precision and capability of detecting the leakage pressure higher than 0.03 MPa.
Description
Technical Field
The invention belongs to the field of indoor pipeline detection, and particularly relates to an indoor pipeline liquid leakage detection system and a detection method thereof.
Background
The floor heating is short for floor radiation heating, the whole floor is used as a radiator, the whole floor is uniformly heated through a heating medium in a floor radiation layer, and the heat conduction is carried out from bottom to top by utilizing the self heat storage and upward heat radiation rule of the floor, so that the purpose of heating is achieved.
The heat medium is divided into a water floor heating system and an electric floor heating system. The water floor heating is a mode of heating indoors by radiating and convecting low-temperature hot water at the temperature of not higher than 60 ℃ on the ground, wherein hot water circularly flows in a heating pipe to heat a floor.
The heating pipe of water ground heating is laid under the floor, and is difficult to discover in time when heating pipeline appears leaking, will reach very big area of leaking and can discover only usually, not only self economic loss is big, still probably will be bad for peripheral unit, resident family.
CN201310114164.2 discloses an indoor pipeline liquid leakage detection system, which is connected to a floor heating system, and comprises: the liquid inlet flow detector is arranged on the liquid inlet pipe and can collect real-time liquid inlet flow of the liquid inlet pipe, the liquid outlet flow detector is arranged on the liquid outlet main pipe and can collect real-time liquid outlet flow signals of the liquid outlet main pipe, the liquid inlet flow comparator compares the real-time liquid inlet flow signals with the real-time liquid outlet flow signals and can output control signals when the difference between the real-time liquid inlet flow and the real-time liquid outlet flow signals reaches or exceeds a difference set value, the flow cut-off valve is arranged on the liquid inlet pipe and can enable the liquid inlet pipe to be in a liquid inlet forbidden state when the liquid inlet flow comparator outputs the control signals, and the liquid inlet flow detector, the liquid outlet flow detector and the flow cut-off valve are all connected with the liquid inlet flow comparator. The detecting instrument detects the real-time liquid inlet amount of the liquid inlet pipe and the real-time liquid outlet amount of the liquid outlet main pipe, when the difference value between the real-time liquid inlet amount and the real-time liquid outlet amount reaches a difference set value, leakage of the indoor pipeline is considered, and the liquid inlet of the liquid inlet pipe is forbidden by closing the flow cut-off valve.
The disadvantages of such a detection system are: 1. the two flowmeters are used for respectively detecting the liquid inlet flow and the liquid outlet flow in real time, and the two flowmeters have manufacturing errors, so that the real-time flows respectively detected by the two flowmeters naturally have inevitable errors, and whether the water outlet pipe leaks or not can be detected only when the leakage amount is larger than the measuring error between the two flowmeters; when the leakage amount is small, the detection system cannot detect. 2. Both flow meters measure the real-time flow, so the flow meters must withstand the long-term scouring of hot water, causing sensitivity to drop; in addition, impurities are easily carried in the running process of hot water in the floor heating system, and the detection sensitivity of the flowmeter is reduced due to the accumulation of the impurities in the long-term use process.
Disclosure of Invention
The invention aims to provide a floor heating pipeline leakage detection system which is high in detection precision and can detect the leakage pressure higher than 0.03 MPa.
Survey the detecting system of indoor pipeline leakage with travel switch, connect on underfloor heating system, its characterized in that: the detection system comprises a controller, a liquid inlet valve arranged on a liquid inlet pipe, a liquid outlet valve on a liquid outlet main pipe and a plunger pressure maintaining assembly arranged between the liquid inlet valve and the liquid outlet valve, wherein the plunger pressure maintaining assembly comprises a plunger cylinder, a plunger and a spring, the plunger cylinder is provided with a communication hole communicated with a pipeline of the floor heating system, and a closed volume is formed between the plunger and the communication hole; the top of the plunger cylinder is provided with a stop piece, a spring is pre-tightened between the stop piece and the plunger, and an open volume communicated with the atmosphere is formed between the stop piece and the plunger; and a travel switch is arranged on a travel path of the plunger, and when the plunger touches the travel switch, the controller sends out a leakage alarm.
During leakage detection, the liquid outlet valve is closed first, then the liquid inlet valve is closed, so that the sealed volume between the plunger and the communicating hole is fully flushed, the spring is fully compressed, and the spring provides pressure maintaining micro-pressure for the pipeline. When the conduit is leak-free, the enclosed volume provides the pressure of the compression spring to hold the plunger stationary or slightly lowered without triggering the travel switch. When the plunger descends to trigger the travel switch, the leakage of the pipeline is indicated, the hydraulic pressure is reduced to be insufficient to resist the restoring force of the spring, and the spring pushes the plunger to descend.
Furthermore, the liquid inlet valve and the liquid outlet valve are controlled by the controller.
Furthermore, the exposed end of the plunger is provided with a trigger piece of a travel switch, and the travel switch is located 3-5mm below the trigger piece. The trigger touches the travel switch, and the controller gives out a leakage alarm.
Further, the floor heating pipeline comprises a liquid inlet pipe, a liquid distribution header pipe, a liquid collection header pipe and a liquid outlet header pipe, wherein the liquid distribution header pipe is connected with the liquid inlet pipe and the indoor pipeline, the liquid collection header pipe is connected with the liquid outlet header pipe and the indoor pipeline, and liquid in the liquid distribution header pipe firstly enters the plunger cylinder through a connector of the liquid distribution header pipe and the indoor pipeline.
Further, the liquid inlet valve and the liquid outlet valve are controlled by a controller, the controller is provided with a power supply, a timing module, a control module and an alarm module, after the liquid inlet valve and the liquid outlet valve are closed by the control module, the timing module starts to detect time length for timing, and the controller continuously monitors the state of the travel switch; when the travel switch is triggered, the alarm module alarms and the control module keeps the liquid inlet valve closed, and liquid inlet is forbidden to prevent further leakage. Otherwise, after the detection time of the timing module reaches the detection time, the control module starts the liquid inlet valve and the liquid outlet valve. The detection time period is usually set to 5min to 10 min. The power supply comprises a switching power supply and an emergency power supply.
Furthermore, the timing module is provided with a detection time length timing unit and an interval time length timing unit, the control module enables the liquid inlet valve and the liquid outlet valve to be started, the interval time length timing unit starts timing, and after the interval time length is reached, the control module closes the liquid inlet valve and the liquid outlet valve to enter a detection state.
The floor heating pipeline leakage detection method comprises the following steps:
step 1: when the floor heating system is in a working state, the liquid outlet valve is closed first, then the liquid inlet valve is closed, the plunger is fully lifted due to the closing time difference of the liquid outlet valve and the liquid inlet valve, and the spring is fully pre-tightened;
step 2: within the detection time, the controller continuously monitors whether the travel switch is triggered;
and step 3: when the travel switch is triggered, the controller sends out a liquid leakage alarm; if the travel switch keeps a non-trigger state, when the detection duration reaches, the controller starts the liquid inlet valve and the liquid outlet valve.
Furthermore, in the step 1, the controller sends out an instruction to close the liquid outlet valve firstly, and close the liquid inlet valve after a specified time interval, wherein the specified time is based on the time required by the full rise of the plunger.
The invention has the advantages that:
1. the hydraulic pressure of a mechanical plunger pressure maintaining assembly and a travel switch is used, the problem that an error exists between two measuring devices is solved, and leakage and seepage required by any specification can be detected by setting the distance between a plunger and the travel switch.
2. Liquid firstly passes through the indoor pipeline connecting port through the liquid-separating main pipe and then reaches the plunger cylinder, so the plunger cylinder is equivalent to a closed end, the flow rate of the liquid in the plunger cylinder is very low, the scouring received by the plunger and the spring is very small, and the service life is long.
3. The floor heating pipeline pressure maintaining device has the advantages that the spring and the plunger are used, micro-pressure maintaining can be provided for the floor heating pipeline when measurement is conducted, and the floor heating pipeline can be prevented from being damaged by too high pressure.
Drawings
FIG. 1 is a schematic of the present invention.
In the figure, a liquid inlet pipe 1, a liquid inlet valve 2, a liquid distribution header pipe 3, a plunger pressure maintaining assembly 4, a travel switch 5, a liquid collection header pipe 6, a liquid outlet valve 7, a liquid outlet pipe 8, a controller 9, a switching power supply 10, an emergency power supply 11, a timing module 12, an alarm module 13, an indoor pipeline 14 and a liquid outlet pipe 15.
Detailed Description
As shown in fig. 1, the floor heating pipeline comprises a liquid inlet pipe, a liquid distribution header pipe, a liquid collection header pipe, a liquid outlet pipe and an indoor pipeline; the liquid distribution main pipe is connected with the liquid inlet pipe and the indoor pipeline, and the liquid collection main pipe is connected with the indoor pipeline and the liquid outlet pipe.
As shown in FIG. 1, the detection system of the present invention is connected to a floor heating system. The device comprises: liquid inlet valve 2, liquid outlet valve 7, plunger pressure maintaining component 4 and travel switch 5, and controller 9. The liquid inlet valve 2 and the liquid outlet valve 7 are controlled by a controller 9, and the trigger signal of the travel switch 5 is input into the controller.
The liquid inlet valve 2 is arranged on the liquid inlet pipe 1, and the controller 9 can cut off the liquid inlet of the liquid inlet pipe 1 by controlling the liquid inlet valve. The liquid outlet valve is arranged on the liquid outlet pipe 8, and the controller 9 controls the liquid outlet valve to cut off the liquid outlet of the liquid outlet pipe 8. The controller can close the liquid outlet valve 7 and the liquid inlet valve 2 at set time, and detect whether the travel switches are triggered or not within the time that the liquid inlet valve and the liquid outlet valve are closed.
The plunger pressure maintaining assembly is arranged on the liquid separating main pipe 3 and used for providing pressure during the closing of the two valves, the plunger pressure maintaining assembly 3 consists of a plunger pressure maintaining assembly and a travel switch, the plunger pressure maintaining assembly 4 comprises a plunger cylinder, a plunger and a spring, the plunger cylinder is provided with a communication hole communicated with a pipeline of a floor heating system, and a closed volume is formed between the plunger and the communication hole; the top of the plunger cylinder is provided with a stop piece, the spring is pre-tightened between the stop piece and the plunger, and an open volume communicated with the atmosphere is formed between the stop piece and the plunger.
The travel switch 5 is arranged in a travel path of the plunger, and when a trigger part of the plunger touches the travel switch, the alarm module 13 of the controller 9 sends out a leakage alarm and keeps the liquid outlet valve 7 and the liquid inlet valve 2 closed.
In the above detection system, the stroke of the plunger and the hooke's modulus of the spring need to be set as required, and the hydraulic pressure needs to be able to jack up the plunger, according to the specification on page 5, 3.1.3 in technical code for radiant heating on the ground (Ministry of construction, industry Standard JGJ 142-2004): the working pressure of the low-temperature hot water ground radiation heating system is not more than 0.8Mpa, so the reaction force provided by the spring is less than 0.8 Mpa.
The above-mentioned stroke switch 5 on the plunger side needs to be designed to be adjustable along the moving direction of the plunger and to be fixed after adjustment, and the fixed position is to enable the plunger to touch the stroke switch 5 after movement.
The liquid outlet valve 7 and the liquid inlet valve 2 are closed in the set time, and the liquid outlet valve 7 needs to be closed first, and then the liquid inlet valve 2 needs to be closed.
In the above-mentioned floor heating pipe liquid leakage detection system, the controller should further have a timing module 12 for performing a test every corresponding time. Due to the arrangement of the timing module 12, a specified number of tests can be performed within one day so as to achieve the purpose of finding problems in time, meanwhile, the intermittent tests can reduce the loss of electric quantity, and only the standby loss of the controller needs to be maintained. The set interval time does not need to be short, and is only required to be 6h-8h once, or is longer, and is also an acceptable scheme once a day. In principle, the test should be performed during a steady operation stage, and the stage just started needs to be avoided because air in the pipeline interferes with the test result.
In the above system for detecting liquid leakage of floor heating pipe, the controller 9 should be further connected with a switching power supply 10 and an emergency power supply 11 for connecting with the mains supply; the controller 9 is also connected with a control panel which can input parameters to the controller.
The timing time and the closing duration of the two shut-off valves can be conveniently input through the control panel.
The method for detecting the liquid leakage of the floor heating pipeline comprises the following steps:
A. when the floor heating system is in a working state, the liquid outlet valve 7 is closed to forbid liquid outlet, then the liquid inlet valve 2 is closed to forbid liquid inlet, so that the plunger piston rises fully, and meanwhile, the spring is fully pre-tightened;
B. continuing for a period of time, when the trigger piece of the plunger touches the travel switch 5, the floor heating system is considered to have leakage, and an alarm signal is output, otherwise, a control signal is output;
C. when the alarm signal is output, the liquid inlet pipe 1 is controlled to be in a liquid inlet prohibition state and the controller 9 gives an alarm, when the control signal is output, the leakage does not exist, and the liquid outlet valve 7 and the liquid inlet valve 2 are opened again.
In the method for detecting liquid leakage of the floor heating pipeline, in the step A, the liquid outlet valve 7 needs to be closed firstly, and then the liquid inlet valve 2 needs to be closed, so that back pressure, air entering and the like are prevented. In the step B, the time period is continued, when the trigger of the plunger triggers the travel switch 5 indicates that the liquid inlet valve 2 is closed for a set time, if the pipe has leakage and the plunger slowly descends under the pressure of the spring to touch the travel switch 5, the plunger should not move and cannot touch the travel switch 5 due to the incompressible property of the liquid.
According to actual conditions, the distance between the plunger and the travel switch 5 in a set time period can be set to be 3-5mm, and the distance between the trigger and the travel switch can be set according to actual conditions on site after multiple tests.
In the method for detecting the liquid leakage of the floor heating pipeline, the floor heating system starts to close the liquid outlet valve 7 at set intervals in the stable operation process, closes the liquid inlet valve 2 at intervals and detects whether the travel switch 5 is triggered.
The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications or additions may be made or substituted in a similar manner to the described embodiments by those skilled in the art without departing from the spirit of the invention or exceeding the scope thereof as defined in the appended claims.
Claims (4)
1. Survey the detecting system of indoor pipeline leakage with travel switch, connect on underfloor heating system, its characterized in that: the detection system comprises a controller, a liquid inlet valve arranged on a liquid inlet pipe, a liquid outlet valve on a liquid outlet main pipe and a plunger pressure maintaining assembly arranged between the liquid inlet valve and the liquid outlet valve, wherein the plunger pressure maintaining assembly comprises a plunger cylinder, a plunger and a spring, the plunger cylinder is provided with a communication hole communicated with a pipeline of the floor heating system, and a closed volume is formed between the plunger and the communication hole; the top of the plunger cylinder is provided with a stop piece, a spring is pre-tightened between the stop piece and the plunger, and an open volume communicated with the atmosphere is formed between the stop piece and the plunger; a travel switch is arranged on a travel path of the plunger, and when the plunger touches the travel switch, the controller sends out a leakage alarm; the liquid inlet valve and the liquid outlet valve are controlled by the controller; the exposed end of the plunger is provided with a trigger piece of a travel switch, and the travel switch is located 3-5mm below the trigger piece.
2. The detection system for detecting leakage of indoor pipeline by using travel switch as claimed in claim 1, wherein: the floor heating pipeline comprises a liquid inlet pipe, a liquid distribution header pipe, a liquid collection header pipe and a liquid outlet header pipe, wherein the liquid distribution header pipe is connected with the liquid inlet pipe and the indoor pipeline, the liquid collection header pipe is connected with the liquid outlet header pipe and the indoor pipeline, and liquid in the liquid distribution header pipe firstly passes through a connector of the liquid collection header pipe and the indoor pipeline and then enters the plunger cylinder.
3. The detection system for detecting leakage of indoor pipeline by using travel switch as claimed in claim 2, wherein: the liquid inlet valve and the liquid outlet valve are controlled by a controller, the controller is provided with a power supply, a timing module, a control module and an alarm module, after the liquid inlet valve and the liquid outlet valve are closed by the control module, the timing module starts to detect time and time, and the controller continuously monitors the state of the travel switch; when the travel switch is triggered, the alarm module gives an alarm and the control module keeps the liquid inlet valve closed.
4. The detection system for detecting leakage of indoor pipeline by using travel switch as claimed in claim 3, wherein: the timing module is provided with a detection time length timing unit and an interval time length timing unit, the control module enables the liquid inlet valve and the liquid outlet valve to be opened, the interval time length timing unit starts timing, and after the interval time length is reached, the control module closes the liquid inlet valve and the liquid outlet valve to enter a detection state.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810007055.3A CN108167658B (en) | 2018-01-04 | 2018-01-04 | Detection system and detection method for detecting indoor pipeline leakage by using travel switch |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810007055.3A CN108167658B (en) | 2018-01-04 | 2018-01-04 | Detection system and detection method for detecting indoor pipeline leakage by using travel switch |
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| CN108167658A CN108167658A (en) | 2018-06-15 |
| CN108167658B true CN108167658B (en) | 2020-03-03 |
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| CN201810007055.3A Expired - Fee Related CN108167658B (en) | 2018-01-04 | 2018-01-04 | Detection system and detection method for detecting indoor pipeline leakage by using travel switch |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110332469A (en) * | 2019-08-23 | 2019-10-15 | 薛兵兵 | A kind of floor heating monitoring of leakage system and monitoring method |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3105433B2 (en) * | 1995-10-17 | 2000-10-30 | 松下電器産業株式会社 | Piping leak detection device |
| CN101467019A (en) * | 2006-01-19 | 2009-06-24 | 特拉华资本组成公司 | Line leak detector |
| CN201488862U (en) * | 2009-07-23 | 2010-05-26 | 厦门建霖工业有限公司 | Water leakage detector |
| CN102147271A (en) * | 2011-01-12 | 2011-08-10 | 谢浩荣 | Differential pressure flowmeter and domestic water-leakage protection system thereof |
| CN103225745B (en) * | 2013-04-02 | 2015-08-05 | 华星澳亚控股有限公司 | Floor heating pipeline leak of liquid detection device and detecting method thereof |
| CN105714920B (en) * | 2016-04-07 | 2017-12-26 | 石文浩 | A kind of anti-overflow unimpeded warning device of sewer |
| EP3239682B1 (en) * | 2016-04-27 | 2020-08-12 | Honeywell Technologies Sarl | Leakage detection device and water system comprising a leakage detection device |
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Granted publication date: 20200303 Termination date: 20220104 |