CN112833337B

CN112833337B - Water equipment leakage monitoring system and method and pre-filter with system

Info

Publication number: CN112833337B
Application number: CN202010970345.5A
Authority: CN
Inventors: 曾奇风
Original assignee: Yuhuan Hongri Valve Co ltd
Current assignee: Yuhuan Hongri Valve Co ltd
Priority date: 2019-10-11
Filing date: 2020-09-15
Publication date: 2022-11-11
Anticipated expiration: 2040-09-15
Also published as: CN110985895A; CN112833337A

Abstract

The invention relates to the technical field of water leakage monitoring, in particular to a water leakage deviceA leakage monitoring system, a method and a pre-filter with the system solve the problem that water leakage cannot be found in time in the prior art. The monitoring system comprises a one-way valve, an induction device and a judging mechanism, wherein the induction device is arranged in a pipeline and used for acquiring the sum of the time lengths of the one-way valve which is opened, closed or opened and closed once and recording the sum as T; the judging mechanism comprises a first judging mechanism and/or a second judging mechanism, and the first judging mechanism is used for comparing the single-time opening time T of the one-way valve with a preset time T' and judging whether leakage exists or not; the second judging mechanism is used for calculating the absolute value delta T of the time length difference of the two adjacent one-way valves in the same state, comparing the delta T with a preset time length value T2 and judging whether the delta T is in the state of being

A range; the comparison device transmits signals to the accumulation device after comparing; the determination device compares the count F with a preset count F' to determine whether or not there is a leak.

Description

Water equipment leakage monitoring system and method and pre-filter with system

Technical Field

The invention relates to the technical field of water leakage monitoring, in particular to a water consumption equipment leakage monitoring system and method and a pre-filter with the system.

Background

At present, a plastic water pipe is generally adopted to convey service water, water leakage often occurs in the use process of the plastic water pipe due to aging, leakage, breakage and the like, the water leakage phenomenon not only causes waste of water resources, but also increases water cost of a user, the leaked water is also very likely to cause damage to buildings, especially in areas with dense houses, the loss of next-door residents and lower-layer residents due to one-position water leakage can be caused, great inconvenience is brought to daily life of the residents, and therefore the water leakage monitoring is very important. At present, there are several methods for detecting water leakage, such as monitoring by using ultrasonic waves, sound wave vibration signals of water flow, or using special monitoring wires. The method is mainly used for searching for the water leakage point after the user finds out the water leakage, and the user cannot know whether the water leakage occurs or not in time.

Disclosure of Invention

In view of the shortcomings of the prior art, a first object of the present invention is to provide a water consumption device leakage monitoring system, which has the advantage that a user can know whether water leakage occurs in time.

The technical purpose of the invention is realized by the following technical scheme:

a water-using appliance leak monitoring system, the monitoring system comprising:

the check valve is arranged in the pipeline and used for limiting the unidirectional flow of water in the pipeline and dividing a flow passage in the pipeline into a water inlet section and a water outlet section;

the sensing device is arranged in the pipeline and used for acquiring the time length of the one-way valve in the opening state and the time length of the closing state or the sum of the time lengths of the opening state and the closing state and recording the time length as T;

the judging mechanism comprises a first judging mechanism and/or a second judging mechanism;

the first determination mechanism includes:

the judging device is connected with the sensing device and used for comparing the one-time opening duration T of the one-way valve collected by the sensing device with a preset duration T' and judging whether the water equipment leaks;

the second determination means includes:

the calculating device is used for calculating the absolute value of the time length difference delta T = | Tn +1-Tn | of the one-way valve in the same state at two adjacent times, wherein n represents the number of times and is a natural number;

a comparison device connected with the calculation device for comparing the received time length difference absolute value Delta T with a preset time length value T2 and judging whether the time length difference absolute value Delta T is in

Example (A) ofThe inside of the enclosure;

the comparing device is used for transmitting a signal for increasing the count or clearing the count F to the accumulating device through comparison;

and the judging device is connected with the accumulating device and is used for comparing the count F on the accumulating device with the preset count F' and judging whether the water-consuming equipment leaks or not.

The working principle is as follows: set up in the inside check valve of pipeline, on the one hand can the inside water of control pipeline only can be by the section flow direction play water section of intaking, and on the other hand check valve can cut off the section of intaking with a play water section, and only when the water pressure difference between the section of intaking and a play water section is greater than the directional section one side of intaking that the valve stem received in the check valve, the water in the section of intaking just can promote the valve stem and enter into a play water section.

When the device is used specifically, the first judging mechanism and the second judging mechanism can be selected, or the combination of the two judging mechanisms can be selected;

aiming at a first judging mechanism: when the one-way valve is opened for a time T longer than a certain value T', the leakage of the water using equipment can be judged without comparing for many times, wherein the leakage generally refers to the leakage with larger flow rate but is not limited to the leakage with larger flow rate;

for the second determination means: the user opens the one-way valve to reduce the pressure of the water outlet section, so that the water flows from the water inlet section to the water outlet section; if the pipeline leaks, the pressure of the water outlet section is also reduced, so that the water flows from the water inlet section to the water outlet section. The difference is that when the user opens the check valve manually, the time difference between the opening time and the time interval between two openings is large, and when leakage occurs, the time for opening or closing the check valve each time is uniform. How to judge the time for opening or closing the check valve each time is relatively uniform, the judgment is made by analyzing the absolute value delta T of the time length difference between the two adjacent times of the check valve in the opening state or the closing state or between the opening state and the closing state, for example: if the absolute value delta T of the time length difference between two adjacent opening states of the one-way valve is in

If F is larger than or equal to F', the time difference that the check valve is continuously opened for multiple times is in a preset range, so that the time difference that the check valve is opened for each time is small, namely the time for opening each time is uniform, and leakage is indicated, otherwise, the leakage is not indicated; and when the absolute value delta T of the time length difference between the closing state or the opening state and the closing state of the one-way valve is analyzed for judgment, the principle is the same as the steps, and the details are not repeated. The application carries out statistics and comparison for many times through the accumulation device so as to reduce the occurrence of misjudgment and enable a user to accurately know the occurrence of leakage. Wherein the water consuming device may comprise a pipeline, a water consuming terminal, etc.

In the leakage monitoring system for the water equipment, the sensing device comprises a first sensing device arranged on the one-way valve and a first timing device arranged in the pipeline and connected with the first sensing device:

when the water pressure difference between the water inlet section and the water outlet section is not enough to open the one-way valve, the one-way valve is closed, the sensing device sends a power signal to the timing device, and the timing device starts timing after receiving the power signal;

when the water pressure difference between the water inlet section and the water outlet section is enough to open the one-way valve, the one-way valve is opened, the sensing device sends a power signal to the timing device, and the timing device stops timing after receiving the power signal.

Through the technical scheme, the flowing state and the stopping state of water are reflected by the opening and closing of the one-way valve, so that the monitoring of the interval time of two times of water flowing becomes more convenient.

In the leakage monitoring system for the water equipment, the sensing device comprises a magnet and a hall element which are matched for use, the magnet is arranged on the one-way valve, and the hall element is arranged on the pipeline.

In the leakage monitoring system for the water equipment, a valve rod of the one-way valve is provided with a central hole, the magnet is arranged in the central hole, and the hall element is arranged on the side wall of the pipeline and is positioned on the side edge of the valve rod.

In the leakage monitoring system for the water equipment, the sensing device comprises an ultrasonic monitor arranged in the pipeline.

In the leakage monitoring system for the water equipment, the impeller is arranged in the pipeline, and the induction device comprises an inductor for detecting the number of rotation turns or the number of pulses of the impeller.

In the above-mentioned water-using equipment leakage monitoring system, the monitoring system further comprises:

the electric valve is arranged in the pipeline and is positioned between the one-way valve of the pipeline and the water outlet end;

the pressure sensor is arranged between the electric valve and the water outlet end of the pipeline;

and the controller is connected with the electric valve, the pressure sensor and the judging device.

In view of the shortcomings of the prior art, a second object of the present invention is to provide a method for monitoring leakage of water consuming equipment, which has the advantage that a user can know whether water leakage occurs in time.

a water-consuming equipment leak monitoring method, characterized in that the monitoring method comprises the steps of:

s1, a collection process: acquiring the time length of a one-way valve in a pipeline in an opening state, the time length of a closing state or the sum of the time lengths of the opening state and the closing state through an induction device, and recording the time length as T;

s2, a determination process: the determination step includes the following step s1 and/or step s2:

the process s1 includes the steps of:

the sensing device transmits the collected single opening time T of the one-way valve to the judging device, the judging device compares the single opening time T of the one-way valve with a preset time T ', and when the T is more than or equal to the T', the water consumption equipment is judged to be leaked;

the process s2 includes the steps of:

a. calculating an absolute value of a time length difference delta T = | + Tn +1-Tn |, wherein n represents the number of times and is a natural number, of the check valve in two adjacent identical states through a calculating device;

b. after the computing device transmits the absolute value delta T of the time length difference to the comparing device, the data is cleared;

c. the comparison device compares the received absolute value delta T of the time length difference with a preset time length value T2 and judges whether the absolute value delta T of the time length difference is in

Wherein t1 is a preset positive tolerance value and t2 is a preset negative tolerance value;

when Δ T is in

When the counting number is within the range of (2), transmitting a signal to the accumulation device, and adding 1 to the count P on the accumulation device;

when Δ T is not in

When the counting number is within the range of (2), transmitting a signal to the accumulation device, and resetting the count P on the accumulation device;

d. the determination device compares the count F on the accumulation device with a preset count F':

when F is more than or equal to F', judging that the pipeline leaks;

when F < F', judging that the pipeline does not leak;

the monitoring method further includes a secondary detection process after the S2 determination process, the secondary detection process including the steps of:

s3: when the judgment device in the judgment step S2 judges that the pipeline leaks, closing the electric valve in the pipeline, and detecting the pressure value P between the electric valve in the pipeline and the water outlet end after the preset time T3;

s4: comparing the pressure value P with a preset pressure value P ', and if the pressure value P is smaller than the preset pressure value P', judging that leakage occurs; and if the pressure value P is greater than or equal to the preset pressure value P', judging that no leakage occurs, and opening the electric valve.

In the detection, the step S1 or the step S2 may be selected for the step S2 determination, or the step S1 and the step S2 may be selected in combination.

When the working procedure s1 is selected, the sensing device conveys the collected one-time opening duration T of the one-way valve to the judging device, the judging device compares the one-time opening duration T of the one-way valve with a preset duration T ', and when the T is more than or equal to the T', the water consumption equipment is judged to be leaked;

when the working procedure s2 is selected, the user opens the one-way valve to reduce the pressure of the water outlet section, so that the water flows from the water inlet section to the water outlet section; if the pipeline leaks, the pressure of the water outlet section is also reduced, so that the water flows from the water inlet section to the water outlet section. The difference is that when the user opens the check valve manually, the time difference between the opening time and the time interval between two openings is large, and when leakage occurs, the time for opening or closing the check valve each time is uniform. How to judge the time for opening or closing the check valve each time is relatively uniform, the judgment is made by analyzing the absolute value delta T of the time length difference between the two adjacent times of the check valve in the opening state or the closing state or between the opening state and the closing state, for example: if the absolute value delta T of the time length difference of the two adjacent opening states of the one-way valve is in

If F is larger than or equal to F', the time difference that the check valve is continuously opened for multiple times is in a preset range, so that the time difference that the check valve is opened for each time is small, namely the time for opening each time is uniform, and leakage is indicated, otherwise, the leakage is not indicated; and when the absolute value delta T of the time length difference between the closing state or the opening state and the closing state of the one-way valve is analyzed for judgment, the principle is the same as the steps, and the details are not repeated. The application carries out statistics and comparison for many times through the accumulation device so as to reduce the occurrence of misjudgment and enable a user to accurately know the occurrence of leakage.

And then, secondary detection is carried out in a pressure detection mode, and the detection precision can be effectively improved by combining the pressure detection mode and the pressure detection mode, so that the problem that the detection cannot be carried out only in a flow difference mode when the water leakage quantity is small is avoided, and misjudgment caused by water flow fluctuation and the like can also be avoided. In addition, in the prior art, the external pressurizing mechanism is used for pressurizing the pipeline to detect whether leakage occurs, the mode has a complex structure, and in the application, the electric valve and the water outlet end are effectively utilized, particularly, after the electric valve and the water outlet end such as a faucet are closed, certain pressure is formed in the pipeline, the pressurizing mechanism is omitted, and the detection can be performed in the actual use of the pipeline. In summary, the detection method is a full-automatic intelligent detection process, effectively improves detection precision, avoids misjudgment, combines the characteristics of the pipeline to generate pressure, omits an external pressurizing mechanism, simplifies the structure, reduces cost and considers normal heating.

In the above method for monitoring leakage of water-consuming equipment, in the step S1, whether the check valve in the pipeline is in an open state or a closed state may be monitored by:

when the one-way valve moves away from the sealing position, the one-way valve is in an opening state, otherwise, the one-way valve is in a closing state.

In the above method for monitoring leakage of water-consuming equipment, in the step S1, the time length T may be monitored by:

the length of time that the check valve is away from or against the seal is monitored.

A pre-filter having a consumer leak monitoring system, the pre-filter comprising the consumer leak monitoring system.

With this water equipment leakage monitoring system and leading filter cooperation use together, when promoting the water quality, avoid taking place the leakage condition, can maximize promotion user's use experience. The specific structure of the pre-filter can be selected from the technology adopted in the patent applied by the applicant, and can also be selected from other types of pre-filters on the market.

Compared with the prior art, the invention has the following advantages:

1. the method analyzes whether the absolute value delta T of the time length difference of the two adjacent times of the one-way valve in the opening state, the closing state or the opening state and the closing state is repeated

So as to judge whether leakage occurs, and counting and comparing for many times to reduce the occurrence of misjudgment and enable a user to accurately know the occurrence of leakage;

2. this application adopts pressure measurement's mode to carry out the secondary and detects, and both synthesize, can effectively improve and detect the precision, avoid only through the unable problem that detects out of the mode of flow difference when the volume of leaking water is less, also can avoid producing erroneous judgement because of rivers are undulant etc..

Drawings

FIG. 1 is a sectional view of the leakage monitoring system of the water-consuming equipment in the embodiment.

Fig. 2 is a schematic diagram of one-time detection of the leak monitoring system in the embodiment.

In the figure: 1. a one-way valve; 2. an induction device; 3. a computing device; 4. a comparison device; 5. an accumulation means; 6. a determination device; 7. a sensing device; 71. a magnet; 72. a Hall element; 8. a timing device; 9. a water inlet section; 10. a water outlet section; 11. a valve stem; 12. a central bore; 13. a pipeline; 14. an electrically operated valve; 15. a pressure sensor.

Detailed Description

The following are specific embodiments of the present invention and are further described with reference to the accompanying drawings, but the present invention is not limited to these embodiments.

As shown in fig. 1 and 2, the monitoring system includes a check valve 1, an induction device 2 and a determination mechanism, wherein the check valve 1 is disposed inside a pipe 13 and used for limiting one-way flow of water inside the pipe 13, and dividing a flow channel in the pipe 13 into a water inlet section 9 and a water outlet section 10.

The sensing device 2 is arranged in the pipeline 13 and is used for acquiring the time length of the one-way valve 1 in the opening state, the time length of the closing state or the sum of the time lengths of the opening state and the closing state, and recording the time length as T.

In this embodiment, the sensing device 2 comprises a sensing device 7 disposed on the check valve 1, and a timing device 8 disposed inside the pipe 13 and connected to the sensing device 7:

when the water pressure difference between the water inlet section 9 and the water outlet section 10 is not enough to open the one-way valve 1, the one-way valve 1 is closed, the sensing device 7 sends an electric signal to the timing device 8 at the moment, and the timing device 8 starts timing after receiving the electric signal;

when the water pressure difference between the water inlet section 9 and the water outlet section 10 is enough to open the one-way valve 1, the one-way valve 1 is opened, the sensing device 7 sends an electric signal to the timing device 8 at the moment, and the timing device 8 stops timing after receiving the electric signal.

Preferably, in the present embodiment, the sensing device 2 includes a sensing device 7, and the sensing device 7 is disposed on the check valve 1 for monitoring the opening and closing of the check valve 1. When judging whether the check valve 1 is in an open or closed state, the check valve 1 can be monitored whether being in a sealed position. In the present embodiment, the sensing device 7 preferably includes a magnet 71 and a hall element 72, which are used together, the magnet 71 is disposed on the check valve 1, and the hall element 72 is disposed on the pipe 13. In order to improve the monitoring precision and effect, a central hole 12 is formed in the valve rod 11 of the check valve 1, the magnet 71 is arranged in the central hole 12, and the hall element 72 is arranged on the side wall of the pipeline 13 and located on the side edge of the valve rod 11. Of course, as another solution, the hall element 72 may be designed to be in a position coaxial with the valve stem 11, but this solution is inferior to the former in monitoring effect, but can also achieve the judgment of whether the check valve 1 is in the open or closed state.

Alternatively, the sensing device 2 may comprise an ultrasonic monitor disposed within the conduit 13. Of course, it is also possible to provide an impeller in the duct 13, the sensing means 2 comprising a sensor for detecting the number of turns or pulses of the impeller. When the one-way valve 1 is opened, the pipeline fluctuates, the corresponding ultrasonic monitor can detect the flow, or the inductor can detect the rotation or pulse of the impeller, so that the one-way valve is judged to be in an opening state; and vice versa.

The structure of the ultrasonic monitor, which is a prior art structure, is specifically used for detecting the number of rotations and pulses of the impeller, and the structure of the ultrasonic monitor is also described in the patent of the applicant, such as patent CN109708829A, and other structures capable of detecting in the prior art are also within the protection scope of the present application.

And the timing device 8 is used for recording the time length of the one-way valve 1 in the opening state and the closing state once or the time length sum of the two states once. Specifically, when the check valve 1 is opened when leaving the seal, the sensing device 7 sends a timing signal to the timing device 8, and the timing device 8 starts timing; when the one-way valve 1 returns to the sealing position and is in a closed state, the sensing device 7 sends a timing signal to the timing device 8, the timing device 8 stops timing, and at the moment, T is recorded as the time when the one-way valve 1 is in an open state once; and when the time of single closing of the check valve 1 and the sum of the opening time and the closing time are monitored, the principle is consistent.

The judging mechanism comprises a first judging mechanism and/or a second judging mechanism.

The first judging mechanism comprises a judging device 6 which is connected with the sensing device 2 and used for comparing the single-time opening time T of the check valve 1 collected by the sensing device 2 with the preset time T' and judging whether the water equipment leaks.

The second determination means includes a calculation device 3, a comparison device 4, an accumulation device 5, and a determination device 6.

The calculating device 3 is used for calculating an absolute value of a time length difference Δ T = | + Tn +1-Tn |, where n represents the number of times and is a natural number, of two adjacent times of the check valve 1 in the same state; the comparison device 4 is connected with the calculation device 3 and is used for comparing the received time length difference absolute value delta T with a preset time length value T2 and judging whether the time length difference absolute value delta T is in

Within (d); the accumulation device 5 is connected with the comparison device 4, and the comparison device 4 transmits a signal for increasing the count or clearing the count F to the accumulation device 5 through comparison; the judging device 6 is connected with the accumulating device 5 and is used for comparing the count F on the accumulating device 5 with the preset count F' and judging whether the water equipment leaks or not.

It should be noted that, the design positions of the calculating device 3, the comparing device 4, the accumulating device 5, the determining device 6, and the timing device 8 in this embodiment are not specifically limited, and the calculating device may be designed on the pipeline 1, or may be designed as an external device, and the signal transmission mode may be wired transmission, or may be transmission through various modes such as WIFI and bluetooth.

As shown in fig. 1 and 2, the monitoring system further includes an electric valve 14, a pressure sensor 15, and a controller. The electric valve 14 is arranged in the pipeline 13 and is positioned between the one-way valve 1 of the pipeline 13 and the water outlet end; the pressure sensor 15 is arranged between the electric valve 14 and the water outlet end of the pipeline 13; the controller is connected to the motor-operated valve 14, the pressure sensor 15, and the determination device 6.

As shown in fig. 1 and fig. 2, the monitoring method includes the following steps:

s1, a collection procedure: acquiring the time length of the one-way valve 1 in the pipeline 13 in an opening state once, the time length of a closing state or the sum of the time lengths of the opening state and the closing state through the induction device 2, and recording the time length as T;

preferably, in this step, monitoring whether the check valve 1 in the pipeline 13 is in the open state or the closed state can be realized by the following method: when the one-way valve 1 moves away from the sealing position, the one-way valve 1 is in an opening state, otherwise, the one-way valve 1 is in a closing state;

preferably, in this step, the time period T can be monitored by: monitoring the time length of the check valve 1 leaving or clinging to a sealing position;

s2, a determination process: the determination step includes the following step s1 and/or step s2, and either step s1 or step s2 may be selected alone, or a combination of step s1 and step s2 may be selected.

Wherein the process s1 comprises the following steps:

the induction device 2 transmits the acquired single opening time T of the one-way valve 1 to the judgment device 6, the judgment device 6 compares the single opening time T of the one-way valve 1 with a preset time T ', and when the T is more than or equal to the T', the water consumption equipment is judged to be leaked;

the process s2 includes the steps of:

a. calculating the absolute value of the time length difference delta T = | Tn +1-Tn | of the check valve 1 in the same state twice adjacent to each other through the calculating device 3, wherein n represents the number of times and is a natural number;

b. after the computing device 3 transmits the absolute value delta T of the time length difference to the comparing device 4, the data is cleared;

c. the comparison device 4 compares the received absolute time difference value delta T with a preset time value T2 to judge whether the absolute time difference value delta T is in

Wherein t1 is a preset positive tolerance value, and t2 is a preset negative tolerance value;

when Δ T is in

Within the range of (3), transmitting a signal to the integrating means 5 and adding 1 to the count P on the integrating means 5;

when Δ T is not

When the count value is within the range of (2), transmitting a signal to the accumulation device 5, and resetting the count value P on the accumulation device 5;

d. the determination device 6 compares the count F of the accumulation device 5 with a preset count F':

when F is larger than or equal to F', judging that the pipeline 13 leaks;

when F < F', it is determined that no leakage has occurred in the pipe 13.

For ease of understanding, the following are examples:

assuming that T2 is designed to be on for a period of time 2s, T1 is designed to be 0.3 seconds, T2 is designed to be 0.2 seconds,

then, between 1.8S and 2.3S, it should be noted that, here, it is only an example, and the sizes of t1 and t2 may be equal or different; and P' is designed to be 3 times;

meanwhile, the 1 st opening time of the one-way valve is assumed to be 10S, the 2 nd opening time is assumed to be 12S, the 3 rd opening time is assumed to be 9S, the 4 th opening time is assumed to be 11S, and the 5 th opening time is assumed to be 13S; the 6 th opening time period is 11S.

The specific judgment is as follows:

after the check valve is opened for the second time, the calculating means 3 calculates the absolute value of the time length difference Δ T = | 12S-10S | =2S when the check valve 1 is opened for the first time and the second time, and the comparing means 4 determines that Δ T is in the open state for the second time

In the range of (1), the count P of the totalizing means 5 is 1;

after the check valve is opened for the third time, the calculating means 3 calculates the absolute value of the time length difference Δ T = | 9S-12S | =3S when the check valve 1 is opened for the third time and the second time, and the comparing means 4 determines that Δ T is not in the open state

Within the range of (2), add upThe count P of the device 5 is cleared, and at this time, it is judged that no leakage occurs;

after the check valve is opened for the fourth time, the calculating means 3 calculates the absolute value of the time length difference Δ T = | 11S-9S | =2S when the check valve 1 is opened for the fourth time and the third time, and the comparing means 4 determines that Δ T is in the open state

In the range of (1), the count P of the totalizing means 5 is 1;

after the one-way valve is opened for the fifth time, the calculation means 3 calculates the absolute value of the difference between the time lengths when the check valve 1 is open fifth and fourth times, = 13S-11S | 2S, the comparison device 4 judges that DeltaT is in

In the range of (1), the count P of the totalizing means 5 is 2;

after the check valve is opened for the sixth time, the calculating means 3 calculates the absolute value of the time length difference Δ T = | 11S-13S | =2S when the check valve 1 is opened for the sixth time and the fifth time, and the comparing means 4 determines that Δ T is in the open state

When the count P of the accumulating means 5 is 3, the judging means 6 judges that P.gtoreq.P', and a leak occurs in the pipe 13.

It should be noted that the above data is only an example of specific use, and specific values can be adjusted according to actual use states.

Preferably, the monitoring method further includes a secondary detection step after the step of determining S2, the secondary detection step including the steps of:

s3: when the determination device 6 in the determination step S2 determines that the leak has occurred in the pipe 13, the electric valve 14 in the pipe 13 is closed, and after a predetermined time T3 has elapsed, the pressure value P between the electric valve 14 and the water outlet end in the pipe 13 is detected.

S4: comparing the pressure value P with a preset pressure value P ', and if the pressure value P is smaller than the preset pressure value P', judging that leakage occurs; if the pressure value P is greater than or equal to the preset pressure value P', it is determined that no leakage occurs, and the electric valve 14 is opened.

The embodiment also provides a prefilter with the water equipment leakage monitoring system.

The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications or additions may be made to the described embodiments or alternatives may be employed by those skilled in the art without departing from the spirit or ambit of the invention as defined in the appended claims.

Claims

1. A method for monitoring leakage of a water-using device, the method comprising the steps of:

s1, a collection procedure: acquiring the time length of the one-way valve (1) in the pipeline (13) in the opening state and the closing state at one time or the sum of the time lengths of the opening state and the closing state through the induction device (2), and recording the time length as T;

s2, a judgment process: the determination step includes the following step s1 and/or step s2:

the process s1 includes the steps of:

the sensing device (2) transmits the collected single opening time T of the check valve (1) to the judging device (6), the judging device (6) compares the single opening time T of the check valve (1) with a preset time T ', and when the T is larger than or equal to the T', the water consumption equipment is judged to be leaked;

the process s2 includes the steps of:

a. calculating the absolute value of the time length difference delta T = | + Tn +1-Tn | of the check valve (1) in the same state twice adjacent to each other through a calculating device (3), wherein n represents the number of times and is a natural number;

b. after the computing device (3) transmits the absolute value delta T of the time length difference to the comparing device (4), the data is cleared;

c. the comparison device (4) compares the received absolute time difference delta T with a preset time value T2 and judges whether the absolute time difference delta T is in

when Δ T is in

When the counting number is within the range of (1), transmitting a signal to the accumulation device (5), and adding 1 to the count P on the accumulation device (5);

when Δ T is not

When the count P is within the range of (1), transmitting a signal to the accumulation device (5), and resetting the count P on the accumulation device (5);

d. the judging device (6) compares the count F on the accumulating device (5) with a preset count F':

when F is larger than or equal to F', judging that the pipeline (13) leaks;

when F is less than F', the pipeline (13) is judged not to leak;

s3: when the judgment device (6) in the judgment step S2 judges that the pipeline (13) leaks, closing the electric valve (14) in the pipeline (13), and detecting the pressure value P between the electric valve (14) and the water outlet end in the pipeline (13) after the preset time T3;

s4: comparing the pressure value P with a preset pressure value P ', and if the pressure value P is smaller than the preset pressure value P', judging that leakage occurs; if the pressure value P is larger than or equal to the preset pressure value P', the leakage is judged not to occur, and the electric valve (14) is opened.

2. The method for monitoring the leakage of the water equipment according to the claim 1, wherein in the step of collecting S1, the monitoring whether the check valve (1) in the pipeline (13) is in the open state or the closed state can be realized by the following method:

when the check valve (1) moves away from the sealing position, the check valve (1) is in an opening state, otherwise, the check valve (1) is in a closing state.

3. The method according to claim 1, wherein in the step S1, the time period T is monitored by:

and monitoring the time length of the one-way valve (1) leaving or clinging to the sealing position.

4. A water-using equipment leakage monitoring system, characterized in that the monitoring system comprises the water-using equipment leakage monitoring method according to any one of claims 1 to 3 and:

the check valve (1) is arranged in the pipeline (13) and used for limiting water to flow in a single direction in the pipeline (13) and dividing a flow passage in the pipeline (13) into a water inlet section (9) and a water outlet section (10);

the sensing device (2) is arranged in the pipeline (13) and used for acquiring the time length of the one-way valve (1) in the opening state and the closing state at a time or the sum of the time lengths of the opening state and the closing state and recording the time length as T;

the first judging mechanism comprises:

the judging device (6) is connected with the sensing device (2) and used for comparing the single-time opening time T of the one-way valve (1) collected by the sensing device (2) with a preset time T' and judging whether the water equipment leaks or not;

the second determination means includes:

the calculation device (3) is used for calculating an absolute value of a time length difference delta T = | Tn +1-Tn | when the one-way valve (1) is in the same state twice adjacent to each other, wherein n represents the number of times and is a natural number;

a comparison device (4) connected with the calculation device (3) and used for comparing the received time length difference absolute value delta T with a preset time length value T2 and judging whether the time length difference absolute value delta T is in

Within (d);

the accumulation device (5) is connected with the comparison device (4), and the comparison device (4) transmits a signal for increasing the count or clearing the count F to the accumulation device (5) through comparison;

and the judging device (6) is connected with the accumulating device (5) and is used for comparing the count F on the accumulating device (5) with the preset count F' and judging whether the water-using equipment leaks or not.

5. A water-consuming equipment leakage monitoring system according to claim 4, wherein the sensing device (2) comprises a sensing device (7) arranged on the non-return valve (1), a timing device (8) arranged inside the pipe (13) and connected to the sensing device (7):

when the water pressure difference between the water inlet section (9) and the water outlet section (10) is not enough to open the one-way valve (1), the one-way valve (1) is closed, the sensing device (7) sends an electric signal to the timing device (8), and the timing device (8) starts timing after receiving the electric signal;

when the water pressure difference between the water inlet section (9) and the water outlet section (10) is enough to open the one-way valve (1), the one-way valve (1) is opened, the sensing device (7) sends an electric signal to the timing device (8), and the timing device (8) stops timing after receiving the electric signal.

6. The water-consuming equipment leakage monitoring system according to claim 5, wherein the sensing device (7) comprises a magnet (71) and a Hall element (72) which are used in cooperation, the magnet (71) is arranged on the one-way valve (1), and the Hall element (72) is arranged on the pipeline (13).

7. The water equipment leakage monitoring system according to claim 6, wherein the valve rod (11) of the check valve (1) is provided with a central hole (12), the magnet (71) is arranged in the central hole (12), and the Hall element (72) is arranged on the side wall of the pipeline (13) and is positioned on the side edge of the valve rod (11).

8. The water utility leak monitoring system of claim 4, wherein the sensing device (2) comprises an ultrasonic monitor disposed within the conduit (13).

9. A water-consuming device leak monitoring system according to claim 4, characterized in that an impeller is arranged in the conduit (13), and the sensing means (2) comprises an inductor for detecting the number of turns or pulses of the impeller.

10. The water utility leak monitoring system of claim 4, 5, 6, 7, 8, or 9, wherein the monitoring system further comprises:

the electric valve (14) is arranged in the pipeline (13), and is positioned between the one-way valve (1) of the pipeline (13) and the water outlet end;

the pressure sensor (15), the pressure sensor (15) is set up between the stated electric valve (14) and water outlet end of the pipeline (13);

and a controller connected with the electric valve (14), the pressure sensor (15) and the determination device (6).

11. A pre-filter with a consumer leak monitoring system, the pre-filter comprising the consumer leak monitoring system of any one of claims 4 to 10.