CN113531402A - 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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- CN113531402A CN113531402A CN202110920284.6A CN202110920284A CN113531402A CN 113531402 A CN113531402 A CN 113531402A CN 202110920284 A CN202110920284 A CN 202110920284A CN 113531402 A CN113531402 A CN 113531402A
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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
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- 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
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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
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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 discloses 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 capable of 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 inlet of the channel is far away from the probe, the sensor body works under the default working condition, and the output signal is the actual flow; in normal times, the channel inlet is close to the probe, the leaked micro 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
In the current leakage monitoring, the method adopted in the prior art is that a check valve loaded by an elastic element and a small-caliber bypass connected in parallel are arranged on a main pipeline, and a sensor capable of detecting micro flow is arranged on the bypass; in the water spraying state, water flows through the check valve mainly; under the non-water-spraying state, the leaked water mainly flows through the bypass due to the elastic blocking effect of the one-way valve; thus, a dedicated leakage flow rate detection device can be constructed. The disadvantage of this solution is that the structure is complex and that in order to detect the working flow, another large flow sensor needs to be added.
Disclosure of Invention
The invention aims to solve the technical problem of overcoming the defects of the prior art and provides an automatic high-sensitivity pipe network leakage monitoring sensor which can detect the working flow and the leakage flow at the same time.
The technical scheme adopted by the invention is as follows: the invention discloses 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 capable of 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, the valve core is externally provided with an integrally formed ring support, the valve clack and the spring are distributed on two sides of the ring support, the spring is installed between the ring support of the valve seat and the second valve seat, and two ends of the spring are in contact with the ring support and the second valve seat.
Furthermore, a second valve seat is fixed on the check valve body and is annular, a plurality of first spokes extending towards the inner wall of the check valve body are arranged outside the second valve seat, and two ends of the first spokes are welded; the pipeline butt joint of check valve body and monitoring pipe network, the sensor body is installed on the pipeline, and first disk seat is fixed on the pipeline, and first disk seat is cyclic annular, and first disk seat outside is equipped with a plurality of second spokes that extend to the pipeline inner wall, and the welding is adopted at second spoke both ends.
Furthermore, the flow velocity gain part is a through hole with the diameter smaller than the inner diameter of the channel; further, the inner diameter of the through hole is 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 connecting a pipeline.
Further, the number of the probes is at least one.
Furthermore, the sensor body of the invention is provided with a singlechip which circularly executes the following data processing steps:
s201: sampling, namely sampling the probe flow velocity signal with the sampling precision of 12 bits and the sampling frequency of 100 Hz;
s202: judging laminar flow/turbulent flow, namely calculating the noise level of the original signal, and judging the laminar flow/turbulent flow;
s203: calculating the flow;
s204: and outputting, namely providing the flow data to the external equipment.
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, so that the flow and leakage can be monitored;
detection of both working flow and leakage flow
When water is sprayed, the inlet of the channel 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 inlet of the channel is close to the probe, the leaked micro flow forms higher flow speed on the probe through the acceleration action of the flow speed gain parts of the channel and the inlet of the channel, 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;
high precision and reliability
The sensor body is also provided with a singlechip which is used for sampling the flow velocity signal of the probe, the sampling precision is 12 bits, and the sampling frequency is 100 Hz; can judge the laminar flow/turbulent flow, namely calculate the noise level to the primitive signal, and judge the laminar flow/turbulent flow from this, and can increase the cervix in 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 structural view of an embodiment;
FIG. 2 is a schematic structural diagram according to a second embodiment;
FIG. 3 is a diagram of the third calculation step of the embodiment.
Description of reference numerals: 1-a check valve body; 11-a socket; 12-a socket; 2-a sensor body; 21-a probe; 22-a second probe; 3-a media channel; 32-a media outlet; 33-a first valve seat; 331-a second spoke; 34-a second valve seat; 341-first spoke; 4-a valve core; 41-channel; 42-ring holder; 5-valve clack; 6-a spring; 7-a pipeline; 8-through holes.
Detailed Description
The invention is further described with reference to the drawings and the specific embodiments. Those skilled in the art will be able to implement the invention based on these teachings. Moreover, the embodiments of the present invention described in the following description are generally only some embodiments of the present invention, and not all embodiments. Therefore, all other embodiments obtained by a person of ordinary skill in the art based on the embodiments of the present invention without any creative effort shall fall within the protection scope of the present invention.
In the following description, the appearances of the indicating orientation or positional relationship such as the terms "inner", "outer", "upper", "lower", "left", "right", etc. are only for convenience in describing the embodiments and for simplicity in description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and are not to be construed as limiting the present invention.
The first embodiment is as follows:
the invention relates to a full-automatic high-sensitivity pipe network leakage monitoring sensor, which comprises a check valve body 1 and a sensor body 2, wherein a medium channel 3 is arranged in the check valve body 1, two ends of the medium channel 3 are respectively provided with a medium inlet and a medium outlet 32, the central positions of the medium inlet and the medium outlet 32 are respectively provided with a first valve seat 33 and a second valve seat 34 which are coaxially arranged with the check valve body 1, a valve core 4 is inserted on the first valve seat 33 and the second valve seat 34 in a penetrating way, 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 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; on the pipeline 7 of the pipe network that the check valve body 1 installation was monitored, sensor body 2 was fixed on pipeline 7, sensor body 2 was equipped with probe 21, and case 4 of check valve body 1 was the cavity setting, and inside is equipped with passageway 41, and the passageway 41 both ends are passageway entry and passageway export, and probe 21 closes on the passageway entry setting, and the passageway 41 internal diameter is the ten of pipeline 7 internal diameter, and the passageway entry is equipped with through-hole 8, and the through-hole 8 diameter is the third of passageway 41 internal diameter.
The elastic 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 open. The design that the inner diameter of the channel 41 is one tenth of the inner diameter of the pipeline 7 and the inlet of the channel is one third of the inlet of the channel 41 plays a role in throttling and has remarkable flow velocity gain for tiny 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 in close proximity to the inlet of the passage in the normally closed position of the flap 5. The sensor body 2 outputs the flow signal in real time through a built-in transmitter.
Taking the application of the invention to fire fighting water as an example, the principle is that two working conditions are treated by human distinction: at ordinary times, when spraying water.
When water is sprayed, a medium flows in from the pipeline 7 through the medium inlet, the pressure of the inlet is greater 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, the 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 outputs a signal as actual flow;
in normal times, the channel inlet is located immediately adjacent to the probe 21, and the small flow of leakage creates a higher flow velocity on the probe 21 through the acceleration of the channel 41 and the channel inlet, where the output flow of the sensor body 2 is the leakage flow multiplied by the flow velocity gain. The flow rate gain can be obtained by real flow testing.
When the leakage check is carried out at ordinary times, the staff member can obtain the leakage flow by dividing the flow reading by the flow rate gain. 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, the check valve body 1 of the present invention is provided with a socket 11 and a spigot 12 at both ends thereof, respectively, for pipe connection.
Preferably, the valve core 4 of the present invention is externally provided with an integrally formed ring support 42, the valve flap 5 and the spring 6 are distributed on both sides of the ring support 42, the spring 6 is installed between the ring support 42 of the valve seat and the second valve seat 34, and both ends of the spring 6 are in contact with 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, the exterior of the second valve seat 34 is provided with a plurality of first spokes 341 extending towards the inner wall of the check valve body 1, and both ends of the first spokes 341 are welded. The medium may pass through the gap between the first spoke 341 and the first spoke 341.
Preferably, the first valve seat 33 of the present invention is fixed on the pipe 7, the first valve seat 33 is ring-shaped, a plurality of second spokes 331 extending to the inner wall of the pipe 7 are provided outside the first valve seat 33, and both ends of the second spokes 331 are welded. The first valve seat 33 is fixed on the pipeline 7 for the convenience of installing the valve core 4, before the check valve body 1 is connected with the pipeline 7, the spring 6 is firstly 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.
Example two:
referring to fig. 2, for better flow field sampling, a probe is added on the basis of the first embodiment, the new probe is a second probe 22, and the new 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, and then flow digital values are comprehensively calculated and output, so that two sampling values of a flow field (radial curve) in the pipeline 7 are provided, the flow can be calculated through flow field curve fitting, and the flow can also be obtained through a real-time table look-up mode; the look-up table is obtained in advance by fitting calculation or an actual flow test.
Example three:
referring to fig. 3, the sensor body 2 further includes a single chip microcomputer for executing the data processing steps shown in fig. 3. The method comprises the following steps:
s201: sampling is carried out, wherein the flow velocity signal of the probe 21 is sampled, the sampling precision is 12 bits, and the sampling frequency is 100 Hz;
s202: judging laminar flow/turbulent flow, namely calculating the noise level of the original signal, and judging the laminar flow/turbulent flow;
s203: calculating the flow;
s204: and outputting, namely providing the flow data to the external equipment.
The steps are circularly executed.
Under the condition of water spraying, the fire-fighting water pipe is always in a turbulent flow state (the Reynolds number is far more than 2300), and the absolute value of leakage flow is very small at ordinary times, so that even if a high flow speed is formed on the probe, laminar flow is still realized. The step S202 judges the laminar/turbulent flow S202 based on this principle. The turbulent flow velocity signal has significant pulsating noise, and the standard deviation of the difference between the original signal and the smooth value can be used as a criterion (the turbulent flow is judged if a given threshold value is exceeded); for safety, the standard deviation of three smooth time scales (e.g., 10ms, 50ms, 200 ms) may be calculated simultaneously, and turbulence may be determined when two or all exceed a given threshold.
Thus, the calculated flow S203 calculates the flow according to the current specific operating condition, for example, according to the first embodiment, the conventional calculation is adopted in the turbulent flow, and the conventional calculation value is divided by the flow rate gain in the laminar flow, so as to output a value reflecting the current actual flow.
The data processing method can also be utilized by embodiment two, namely combining multipoint sampling and laminar/turbulent flow condition judgment to obtain better precision and reliability.
While the invention has been described with reference to specific embodiments thereof, it will be understood by those skilled in the art that the invention is not limited thereto, and may be embodied in many different forms without departing from the spirit and scope of the invention as set forth in the following claims. Any modification which does not depart from the functional and structural principles of the present invention is intended to be included within the scope of the claims.
Claims (9)
1. The utility model provides a full-automatic high sensitive pipe network leakage monitoring sensor which characterized in that: including check valve body (1) and sensor body (2), be equipped with in check valve body (1) and follow valve clack (5) that the medium discrepancy direction can free displacement, be equipped with case (4) of following valve clack (5) synchronous displacement on valve clack (5), be equipped with passageway (41) in case (4), the passageway entrance of passageway (41) is equipped with the velocity of flow gain portion, sensor body (2) are equipped with probe (21) that close on the velocity of flow gain portion and set up.
2. The full-automatic high-sensitivity pipe network leakage monitoring sensor according to claim 1, characterized in that: be equipped with medium passageway (3) in check valve body (1), medium passageway (3) both ends are medium entry and medium export (32) respectively, and medium entry and medium export (32) punishment do not are equipped with first disk seat (33) and second disk seat (34), and case (4) alternate on first disk seat (33) and second disk seat (34) and constitute the direction cooperation with the two, and the cover is gone up in case (4) has valve clack (5), installs spring (6) between case (4) and second disk seat (34).
3. The full-automatic high-sensitivity pipe network leakage monitoring sensor according to claim 2, characterized in that: the valve core (4) is externally provided with an integrally formed ring support (42), the valve clack (5) and the spring (6) are distributed on two sides of the ring support (42), the spring (6) is installed between the ring support (42) of the valve seat and the second valve seat (34), and two ends of the spring (6) are abutted to the ring support (42) and the second valve seat (34).
4. The full-automatic high-sensitivity pipe network leakage monitoring sensor according to claim 2, characterized in that: 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 welding is adopted at second spoke (331) both ends.
5. The full-automatic high-sensitivity pipe network leakage monitoring sensor according to claim 1, characterized in that: the flow velocity gain part is a through hole (8) with a diameter smaller than the inner diameter of the channel (41).
6. The full-automatic high-sensitivity pipe network leakage monitoring sensor according to claim 5, characterized in that: the diameter of the through hole (8) is one third of the inner diameter of the channel (41).
7. The full-automatic high-sensitivity pipe network leakage monitoring sensor according to claim 1, characterized in that: two ends of the check valve body (1) are respectively provided with a socket (11) and a spigot (12) for pipeline connection.
8. The full-automatic high-sensitivity pipe network leakage monitoring sensor according to claim 1, characterized in that: the number of the probes (21) is at least one.
9. The full-automatic high-sensitivity pipe network leakage monitoring sensor according to claim 8, characterized in that: the sensor body (2) is provided with a singlechip which circularly executes the following data processing steps:
s201: sampling is carried out, wherein the flow velocity signal of the probe (21) is sampled, the sampling precision is 12 bits, and the sampling frequency is 100 Hz;
s202: judging laminar flow/turbulent flow, namely calculating the noise level of the original signal, and judging the laminar flow/turbulent flow;
s203: calculating the flow;
s204: and outputting, namely providing the flow data to the external equipment.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110920284.6A CN113531402B (en) | 2021-08-11 | 2021-08-11 | Full-automatic high-sensitivity pipe network leakage monitoring sensor |
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| CN202110920284.6A CN113531402B (en) | 2021-08-11 | 2021-08-11 | Full-automatic high-sensitivity pipe network leakage monitoring sensor |
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| CN113531402B 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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| CN113531402B (en) | 2023-08-15 |
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