CN113531402B - Full-automatic high-sensitivity pipe network leakage monitoring sensor - Google Patents
Full-automatic high-sensitivity pipe network leakage monitoring sensor Download PDFInfo
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- CN113531402B CN113531402B CN202110920284.6A CN202110920284A CN113531402B CN 113531402 B CN113531402 B CN 113531402B CN 202110920284 A CN202110920284 A CN 202110920284A CN 113531402 B CN113531402 B CN 113531402B
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- flow
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- pipe network
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Classifications
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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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K15/00—Check valves
- F16K15/02—Check valves with guided rigid valve members
- F16K15/06—Check valves with guided rigid valve members with guided stems
-
- 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
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Examining Or Testing Airtightness (AREA)
Abstract
The invention relates to a full-automatic high-sensitivity pipe network leakage monitoring sensor, and belongs to the technical field of sensors. The invention relates to a full-automatic high-sensitivity pipe network leakage monitoring sensor, which comprises a check valve body and a sensor body, wherein a valve clack capable of freely displacing along the medium inlet and outlet direction is arranged in the check valve body, a valve core synchronously displacing along the valve clack is arranged on the valve clack, a channel is arranged in the valve core, a flow velocity gain part is arranged at the channel inlet of the channel, and a probe close to the flow velocity gain part is arranged on the sensor body. The invention has the functions of detecting the working flow and the leakage flow, when spraying water, the channel inlet is far away from the probe, the sensor body works under the default working condition, and the output signal is the actual flow; at ordinary times, the channel inlet is close to the probe, the leaked tiny flow forms a higher flow speed on the probe through the acceleration action of the flow speed gain parts of the channel and the channel inlet, and the output flow of the sensor body is the leakage flow multiplied by the flow speed gain, so that the leakage condition is monitored.
Description
Technical Field
The invention relates to a full-automatic high-sensitivity pipe network leakage monitoring sensor, and belongs to the technical field of sensors.
Background
The prior art adopts the method of leakage monitoring that a check valve loaded by an elastic element and a shunt with small pipe diameter are arranged on a main pipeline, and a sensor capable of detecting micro flow is arranged on the shunt; in the water spraying state, water mainly flows through the check valve; in the non-water spraying state, the leakage water flow mainly flows through the bypass due to the elastic blocking effect of the one-way valve; in this way, a dedicated leakage flow rate detection device can be constructed. The disadvantage of this solution is the complex structure and the need to add another large flow sensor in order to detect the working flow.
Disclosure of Invention
The invention aims to solve the technical problem of overcoming the defects of the prior art and providing an automatic high-sensitivity pipe network leakage monitoring sensor which can detect the working flow and the leakage flow.
The technical problems are solved, and the invention adopts the following technical scheme: the invention relates to a full-automatic high-sensitivity pipe network leakage monitoring sensor, which comprises a check valve body and a sensor body, wherein a valve clack capable of freely displacing along the medium inlet and outlet direction is arranged in the check valve body, a valve core synchronously displacing along the valve clack is arranged on the valve clack, a channel is arranged in the valve core, a flow velocity gain part is arranged at the channel inlet of the channel, and a probe close to the flow velocity gain part is arranged on the sensor body.
Furthermore, a medium channel is arranged in the check valve body, a medium inlet and a medium outlet are respectively arranged at two ends of the medium channel, a first valve seat and a second valve seat are respectively arranged at the medium inlet and the medium outlet, a valve core is inserted on the first valve seat and the second valve seat and forms guiding fit with the first valve seat and the second valve seat, the valve core is sleeved with the valve clack, and a spring is arranged between the valve core and the second valve seat.
Furthermore, an integrally formed ring support is arranged outside the valve core, the valve clack and the springs are distributed on two sides of the ring support, the springs are arranged between the ring support of the valve seat and the second valve seat, and two ends of the springs are abutted against the ring support and the second valve seat.
Further, the second valve seat is fixed on the check valve body, the second valve seat is annular, a plurality of first spokes extending to the inner wall of the check valve body are arranged outside the second valve seat, and two ends of each first spoke are welded; the check valve body is in butt joint with a pipeline of a monitoring pipe network, the sensor body is installed on the pipeline, the first valve seat is fixed on the pipeline and is annular, a plurality of second spokes extending to the inner wall of the pipeline are arranged outside the first valve seat, and two ends of each second spoke are welded.
Further, the flow velocity gain part is a through hole with the diameter smaller than the inner diameter of the channel; further, the through hole has an inner diameter of one third of the inner diameter of the channel.
Furthermore, the two ends of the check valve body are respectively provided with a socket and a spigot for pipeline connection.
Further, the number of the probes is at least one.
Further, the sensor body of the invention is provided with a singlechip for circularly executing the following data processing steps:
s201: sampling is carried out, the flow velocity signal of the probe is sampled, the sampling precision is 12 bits, and the sampling frequency is 100Hz;
s202: judging the laminar/turbulent flow, namely calculating the noise level of the original signal, and judging the laminar/turbulent flow according to the noise level;
s203: calculating the flow;
s204: and outputting, namely providing the flow data to the external device.
Compared with the prior art, the invention has the following beneficial effects:
simple structure
One set of system only comprises a check valve body and a sensor body;
low cost
A set of system is arranged in the pipeline to monitor the flow and leakage;
both the detection of the working flow and the leakage flow
When water is sprayed, the channel inlet is far away from the probe, the sensor body works under the default working condition, and the output signal is the actual flow; when the channel inlet is close to the probe at ordinary times, the leaked micro flow forms higher flow velocity on the probe through the acceleration action of the flow velocity gain parts of the channel and the channel inlet, and the output flow of the sensor body is the leakage flow rate multiplied by the flow velocity gain, so that the leakage condition is monitored;
high precision and reliability
The sensor body is also provided with a singlechip, samples the flow rate signal of the probe, and has the sampling precision of 12 bits and the sampling frequency of 100Hz; laminar/turbulent flow can be judged, i.e. the noise level is calculated for the original signal, and thus laminar/turbulent flow can be judged, and probes can be added at different positions; and the multipoint sampling and the laminar flow/turbulent flow working condition judgment are combined to obtain better precision and reliability.
Drawings
FIG. 1 is a schematic diagram of an embodiment;
FIG. 2 is a schematic diagram of a second embodiment;
fig. 3 is a diagram of a third calculation step of the embodiment.
Reference numerals illustrate: 1-a check valve body; 11-a socket; 12-socket; 2-a sensor body; 21-a probe; 22-a second probe; 3-medium channel; 32-medium outlet; 33-a first valve seat; 331-second spoke; 34-a second valve seat; 341-a first spoke; 4-valve core; 41-channel; 42-ring support; 5-valve clack; 6-a spring; 7-piping; 8-through holes.
Detailed Description
The invention is further described below with reference to the drawings and specific examples. Those of ordinary skill in the art will be able to implement the invention based on these descriptions. In addition, the embodiments of the present invention referred to in the following description are typically only some, but not all, embodiments of the present invention. Therefore, all other embodiments, which can be made by one of ordinary skill in the art without undue burden, are intended to be within the scope of the present invention, based on the embodiments of the present invention.
In the following description, directional or positional relationships such as the terms "inner", "outer", "upper", "lower", "left", "right", etc., are presented for convenience in describing the embodiments and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the invention.
Embodiment one:
the invention relates to a full-automatic high-sensitivity pipe network leakage monitoring sensor, which is shown in fig. 1, and comprises a check valve body 1 and a sensor body 2, wherein a medium channel 3 is arranged in the check valve body 1, a medium inlet and a medium outlet 32 are respectively arranged at two ends of the medium channel 3, a first valve seat 33 and a second valve seat 34 which are coaxially arranged with the check valve body 1 are respectively arranged at the central positions of the medium inlet and the medium outlet 32, a valve core 4 is inserted on the first valve seat 33 and the second valve seat 34, a valve clack 5 is sleeved on the valve core 4, a spring 6 is arranged between the valve core 4 and the second valve seat 34, the valve core 4 is guided by adopting the first valve seat 33 and the second valve seat 34, and the valve clack 5 is driven to move to seal the medium inlet under the action of the spring 6; the check valve body 1 is installed on the pipeline 7 of the monitored pipe network, the sensor body 2 is fixed on the pipeline 7, the sensor body 2 is provided with a probe 21, the valve core 4 of the check valve body 1 is hollow, a channel 41 is arranged in the check valve body, two ends of the channel 41 are a channel inlet and a channel outlet, the probe 21 is arranged close to the channel inlet, the inner diameter of the channel 41 is one tenth of the inner diameter of the pipeline 7, the channel inlet is provided with a through hole 8, and the diameter of the through hole 8 is one third of the inner diameter of the channel 41.
The spring coefficient of the spring 6 is designed as follows: at a defined small flow rate, the flap 5 is closed, and at a minimum water jet flow rate, the flap 5 is fully opened. The inner diameter of the channel 41 is one tenth of the inner diameter of the pipeline 7, and the design that the size of the channel inlet is one third of the channel 41 plays a role in throttling, so that the flow velocity gain is remarkable for the micro flow.
The sensor body 2 is a conventional electromagnetic flow sensor or a thermal flow sensor and is matched with a specific pipe diameter. The probe 21 at its lower end is located at the centre line of the pipe 7 and is immediately adjacent to the channel inlet in the closed state of the valve flap 5 at ordinary times. The sensor body 2 outputs flow signals in real time through a built-in transmitter.
Taking the fire fighting water as an example, the principle is that two working conditions are treated by human distinction: at ordinary times, water is sprayed.
When water is sprayed, a medium flows in from a pipeline 7 through a medium inlet, the inlet pressure is larger than the weight of the valve clack 5 and the resistance of the spring 6, the valve core 4 moves backwards, the valve clack 5 is opened, a channel inlet on the valve core 4 is far away from the probe 21, and the sensor body 2 works under the default working condition, and an output signal is the actual flow;
at ordinary times, the channel inlet is in close proximity to the probe 21, and the small flow of leakage is caused to form a high flow rate on the probe 21 by the acceleration of the channel 41 and the channel inlet, and the output flow of the sensor body 2 is the leakage flow multiplied by the flow rate gain. The flow rate gain can be obtained by a real flow test.
When performing leak checks at ordinary times, the operator may divide the flow reading by the flow rate gain to obtain the leak flow. When spraying water, the flow reading is directly adopted as the actual flow.
Besides being applied to fire fighting water, the system can also be used for monitoring the flow of natural gas and coal gas and the like.
Preferably, both ends of the check valve body 1 of the present invention are provided with a socket 11 and a spigot 12, respectively, for pipe connection.
Preferably, the valve core 4 is externally provided with an integrally formed ring support 42, the valve clack 5 and the springs 6 are distributed on two sides of the ring support 42, the springs 6 are arranged between the ring support 42 of the valve seat and the second valve seat 34, and two ends of the springs 6 are abutted against the ring support 42 and the second valve seat 34.
Preferably, the second valve seat 34 of the present invention is fixed on the check valve body 1, the second valve seat 34 is annular, a plurality of first spokes 341 extending toward the inner wall of the check valve body 1 are arranged outside the second valve seat 34, and two ends of the first spokes 341 are welded. The medium may pass through the first spoke 341 and the gap between the first spokes 341.
Preferably, the first valve seat 33 of the present invention is fixed on the pipe 7, the first valve seat 33 is annular, a plurality of second spokes 331 extending towards the inner wall of the pipe 7 are arranged outside the first valve seat 33, and two ends of the second spokes 331 are welded. The first valve seat 33 is fixed on the pipeline 7 for installing the valve core 4 conveniently, before the check valve body 1 is connected with the pipeline 7, the spring 6 is sleeved at the tail part of the valve core 4, then the valve core 4 is inserted on the second valve seat 34, finally the valve clack 5 is sleeved, the check valve body 1 is connected with the pipeline 7, and the front end of the valve core 4 is inserted into the first valve seat 33 in a proper manner.
Embodiment two:
referring to fig. 2, for better flow field sampling, a probe is added on the basis of implementing one, the newly added probe is a second probe 22, and the newly added second probe 22 is arranged at a position between the first probe 21 and the pipe wall.
The flow velocity signals of the two probes are respectively collected, flow digital values are comprehensively calculated and output, two sampling values of a flow field (radial curve) in the pipeline 7 are provided, the flow can be calculated through fitting of the flow field curve, and the flow can be obtained through a real-time table look-up mode; the lookup table is obtained in advance by fitting calculation or real flow test.
Embodiment III:
referring to fig. 3, the sensor body 2 further has a single-chip microcomputer, and the data processing steps shown in fig. 3 are executed. The method comprises the following steps:
s201: sampling is carried out, the flow velocity signal of the probe 21 is sampled, the sampling precision is 12 bits, and the sampling frequency is 100Hz;
s202: judging the laminar/turbulent flow, namely calculating the noise level of the original signal, and judging the laminar/turbulent flow according to the noise level;
s203: calculating the flow;
s204: and outputting, namely providing the flow data to the external device.
The above steps are cyclically performed.
Under the water spraying working condition, the fire-fighting water pipe is always in a turbulent state (the Reynolds number is far more than 2300), and at ordinary times, the absolute value of the leakage flow is very small, and even if a higher flow speed is formed on the probe, the flow is still laminar. Step S202 determines the laminar/turbulent flow S202 based on this principle. Turbulent flow velocity signals have significant pulsation noise and standard deviation of the difference between the raw signal and the smoothed value can be used as a criterion (exceeding a given threshold, i.e. determining turbulent flow); for safety purposes, the standard deviation of three smooth time scales (e.g., 10ms, 50ms, 200 ms) may be calculated simultaneously, and turbulence is determined when two or all exceed a given threshold.
Thus, the calculated flow S203 calculates the flow according to the current specific condition, and as described with reference to the first embodiment, conventional calculation is adopted in the case of turbulent flow, and the conventional calculation value is divided by the flow velocity gain in the case of laminar flow, so as to output a value reflecting the current actual flow.
The data processing method can also be utilized by the second embodiment, namely, the multi-point sampling and the laminar flow/turbulent flow working condition judgment are combined, so that better precision and reliability are obtained.
While the invention has been described in terms of embodiments, it will be appreciated by those skilled in the art that the invention is not limited thereto but rather includes the drawings and the description of the embodiments above. Any modifications which do not depart from the functional and structural principles of the present invention are intended to be included within the scope of the appended claims.
Claims (8)
1. A full-automatic high-sensitivity pipe network leakage monitoring sensor is characterized in that: the device comprises a check valve body (1) and a sensor body (2), wherein a valve clack (5) capable of freely displacing along the medium inlet and outlet direction is arranged in the check valve body (1), a valve core (4) synchronously displacing along with the valve clack (5) is arranged on the valve clack (5), a front-back through channel (41) is arranged in the valve core (4), a flow velocity gain part is arranged at a channel inlet of the channel (41), and a probe (21) close to the flow velocity gain part is arranged on the sensor body (2); the channel inlet and the channel outlet of the channel (41) are positioned at two sides of the valve clack (5);
the sensor body (2) is provided with a singlechip which circularly executes the following data processing steps:
s201: sampling is carried out, a flow velocity signal of the probe (21) is sampled, the sampling precision is 12 bits, and the sampling frequency is 100Hz;
s202: judging the laminar/turbulent flow, namely calculating the noise level of the original signal, and judging the laminar/turbulent flow according to the noise level;
s203: calculating the flow;
s204: and outputting, namely providing the flow data to the external device.
2. The fully automatic high-sensitivity pipe network leakage monitoring sensor according to claim 1, wherein: a medium channel (3) is arranged in the check valve body (1), a medium inlet and a medium outlet (32) are respectively arranged at two ends of the medium channel (3), a first valve seat (33) and a second valve seat (34) are respectively arranged at the medium inlet and the medium outlet (32), a valve core (4) is inserted on the first valve seat (33) and the second valve seat (34) and forms guiding fit with the first valve seat and the second valve seat, a valve clack (5) is sleeved on the valve core (4), and a spring (6) is arranged between the valve core (4) and the second valve seat (34).
3. The fully automatic high-sensitivity pipe network leakage monitoring sensor according to claim 2, wherein: the outside of case (4) is equipped with integrated into one piece's ring support (42), and valve clack (5) and spring (6) distribute in ring support (42) both sides, spring (6) are installed between ring support (42) and second disk seat (34) of case to spring (6) both ends conflict ring support (42) and second disk seat (34).
4. The fully automatic high-sensitivity pipe network leakage monitoring sensor according to claim 2, wherein: the second valve seat (34) is fixed on the check valve body (1), the second valve seat (34) is annular, a plurality of first spokes (341) extending towards the inner wall of the check valve body (1) are arranged outside the second valve seat (34), and two ends of the first spokes (341) are welded; check valve body (1) dock with pipeline (7) of monitoring pipe network, and sensor body (2) are installed on pipeline (7), and first disk seat (33) are fixed on pipeline (7), and first disk seat (33) are cyclic annular, and first disk seat (33) outside is equipped with a plurality of second spokes (331) that extend to pipeline (7) inner wall, and second spoke (331) both ends adopt the welding.
5. The fully automatic high-sensitivity pipe network leakage monitoring sensor according to claim 1, wherein: the flow velocity gain part is a through hole (8) with the diameter smaller than the inner diameter of the channel (41).
6. The fully automatic high-sensitivity pipe network leakage monitoring sensor according to claim 5, wherein: the diameter of the through hole (8) is one third of the inner diameter of the channel (41).
7. The fully automatic high-sensitivity pipe network leakage monitoring sensor according to claim 1, wherein: the two ends of the check valve body (1) are respectively provided with a socket (11) and a spigot (12) for pipeline connection.
8. The fully automatic high-sensitivity pipe network leakage monitoring sensor according to claim 1, wherein: the number of the probes (21) is at least one.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110920284.6A CN113531402B (en) | 2021-08-11 | 2021-08-11 | Full-automatic high-sensitivity pipe network leakage monitoring sensor |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110920284.6A CN113531402B (en) | 2021-08-11 | 2021-08-11 | Full-automatic high-sensitivity pipe network leakage monitoring sensor |
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| CN113531402A CN113531402A (en) | 2021-10-22 |
| CN113531402B true CN113531402B (en) | 2023-08-15 |
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| CN205909981U (en) * | 2016-04-14 | 2017-01-25 | 华东理工大学 | Online equipment of steam security valve |
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| CN207112384U (en) * | 2017-06-13 | 2018-03-16 | 宁波华盛联合制动科技有限公司 | A kind of retarder pipeline anti-leak monitoring device |
| CN207634749U (en) * | 2017-10-18 | 2018-07-20 | 浙江搏正铜业有限公司 | A kind of check-valves |
| CN212430480U (en) * | 2020-05-09 | 2021-01-29 | 江阴市鹏鹞联业生物科技有限公司 | Concentrated sulfuric acid high pressure conveying pipeline leaks online dangerous accident monitoring system |
| CN213271164U (en) * | 2020-03-29 | 2021-05-25 | 圣博莱阀门有限公司 | Ultra-low temperature axial-flow type check valve sealing structure |
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2021
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| CN101220878A (en) * | 2007-12-14 | 2008-07-16 | 曾祥炜 | Shuttle type micro-resistance check valve |
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