CN108612890B - Safety monitoring system of household gas pipeline - Google Patents
Safety monitoring system of household gas pipeline Download PDFInfo
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- CN108612890B CN108612890B CN201810724960.0A CN201810724960A CN108612890B CN 108612890 B CN108612890 B CN 108612890B CN 201810724960 A CN201810724960 A CN 201810724960A CN 108612890 B CN108612890 B CN 108612890B
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- pressure detection
- gas
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- 238000012544 monitoring process Methods 0.000 title claims abstract description 42
- 239000007789 gas Substances 0.000 claims abstract description 114
- 238000001514 detection method Methods 0.000 claims abstract description 105
- 230000007246 mechanism Effects 0.000 claims abstract description 75
- 239000002737 fuel gas Substances 0.000 claims abstract description 14
- 238000007789 sealing Methods 0.000 claims description 26
- 230000005540 biological transmission Effects 0.000 claims description 22
- 229910052751 metal Inorganic materials 0.000 claims description 13
- 239000002184 metal Substances 0.000 claims description 13
- 230000002159 abnormal effect Effects 0.000 claims description 9
- 238000000034 method Methods 0.000 claims description 7
- 230000005856 abnormality Effects 0.000 claims description 5
- 230000000149 penetrating effect Effects 0.000 claims description 3
- 238000004891 communication Methods 0.000 claims description 2
- 230000006698 induction Effects 0.000 description 8
- 239000012528 membrane Substances 0.000 description 7
- 230000035945 sensitivity Effects 0.000 description 7
- 229910052782 aluminium Inorganic materials 0.000 description 6
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 6
- 230000009471 action Effects 0.000 description 4
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 230000003993 interaction Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 210000001503 joint Anatomy 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
Classifications
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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
- F16K17/00—Safety valves; Equalising valves, e.g. pressure relief valves
- F16K17/02—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side
- F16K17/04—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side spring-loaded
- F16K17/044—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side spring-loaded with more than one spring
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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
- F16K31/00—Actuating devices; Operating means; Releasing devices
- F16K31/02—Actuating devices; Operating means; Releasing devices electric; magnetic
- F16K31/06—Actuating devices; Operating means; Releasing devices electric; magnetic using a magnet, e.g. diaphragm valves, cutting off by means of a liquid
- F16K31/0644—One-way valve
- F16K31/0655—Lift valves
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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
- F16K37/00—Special means in or on valves or other cut-off apparatus for indicating or recording operation thereof, or for enabling an alarm to be given
- F16K37/0025—Electrical or magnetic means
- F16K37/0033—Electrical or magnetic means using a permanent magnet, e.g. in combination with a reed relays
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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
- F17D5/005—Protection or supervision of installations of gas pipelines, e.g. alarm
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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
Abstract
The invention discloses a safety monitoring system of a household gas pipeline, which comprises a pressure detection valve, a pipeline electromagnetic valve and a controller, wherein the pressure detection valve and the pipeline electromagnetic valve are connected with each other, and the controller is respectively connected with the pressure detection valve and the pipeline electromagnetic valve; the pipeline electromagnetic valve is used for being connected with a fuel gas input pipeline, and the pressure detection valve is used for being connected with a household pipeline; the chamber of the pressure detection valve comprises an upper chamber and a lower chamber, and the two chambers are isolated by a diaphragm; the two chambers are respectively provided with a pressure balance mechanism, one ends of the two pressure balance mechanisms are mutually abutted and are respectively positioned at two sides of the diaphragm; the lower chamber is provided with two fuel gas interfaces and a rocker arm assembly for opening and closing the fuel gas interfaces, and the rocker arm assembly is in driving connection with a pressure balance assembly of the lower chamber. In the pipe detection state, even if the pressure detection valve cannot send an alarm signal at the time of power failure, whether leakage occurs or not can be detected through the pressure detection valve, and the pressure detection valve automatically closes the self-passage.
Description
Technical Field
The invention belongs to the technical field of gas safety monitoring, and particularly relates to a safety monitoring system of a household gas pipeline.
Background
The existing household gas leakage alarm is characterized in that the leakage gas is sensed and alarm is sent out, and the gas leakage alarm has the following defects: the reliability of the gas leakage alarm device is low, tiny leakage occurs, and the gas sensor senses the gas difficultly. The charged alarm device is a dangerous source under the condition of gas leakage; leak alarms often experience false alarms.
The invention discloses an indoor gas pipeline leakage detection method and a pressure sensing device thereof, which are disclosed in Chinese patent publication No. CN 107606491. A pressure sensing device is arranged in each indoor pipeline of the gas pipeline; closing the corresponding main valve of the household pipeline, detecting the pressure in the household pipeline by the pressure sensing device, and locking the inlet end of the household pipeline by an output signal when the pressure in the household pipeline is lower than a set value. The pressure detection device adopts a flexible film to carry out air pressure induction, the device is directly connected with the gas pipeline, and the gas pressure in the pipeline is directly detected, so that the sensitivity is higher; the structure is novel, and the internal detection completely adopts the mechanical principle to conduct signals.
However, the invention provides a pressure sensor that requires additional access to existing gas lines; the more branch ports of the gas pipeline are, the less tightness of the gas pipeline is caused. The maintenance of a plurality of branch ports is relatively troublesome, and when power is off, the main valve for entering a household cannot be effectively alarmed and locked, and a safety monitoring system with complete functions is yet to be developed.
Disclosure of Invention
The invention aims to solve the technical problem that the gas pipeline cannot be closed when the detection of the pressure sensing device fails, and provides a safety monitoring system for a household gas pipeline, which is reliable and practical and is used for real-time monitoring of an indoor gas pipeline.
In order to solve the problems, the invention is realized according to the following technical scheme:
the invention relates to a safety monitoring system of a household gas pipeline, which comprises a pressure detection valve, a pipeline electromagnetic valve and a controller, wherein the pressure detection valve and the pipeline electromagnetic valve are connected with each other, and the controller is respectively connected with the pressure detection valve and the pipeline electromagnetic valve; the pipeline electromagnetic valve is used for being connected with a fuel gas input pipeline, and the pressure detection valve is used for being connected with a household pipeline;
the chamber of the pressure detection valve comprises an upper chamber and a lower chamber, and the two chambers are isolated by a diaphragm; the two chambers are respectively provided with a pressure balance mechanism, one ends of the two pressure balance mechanisms are mutually abutted and are respectively positioned at two sides of the diaphragm; the lower chamber is provided with two fuel gas interfaces and a rocker arm assembly for opening and closing the fuel gas interfaces, and the rocker arm assembly is in driving connection with a pressure balance assembly of the lower chamber;
when the pressure detection valve works, the diaphragm is in an initial tension state, and the rocker arm assembly opens the gas interface; the air pressure of the lower chamber is changed, the tension state of the diaphragm is correspondingly changed, the air pressure abnormality causes the pressure balance mechanisms at the two sides to act to trigger an alarm signal, and the rocker arm component closes the gas interface; the controller receives the alarm signal and controls the pipeline solenoid valve to act.
Further, the controller controls the duct solenoid valve action, specifically, controls the closing of the duct solenoid valve passage and controls the duct solenoid valve to lock the closed passage.
Further, the pressure balancing mechanism of the upper chamber is a first pressure balancing component, which comprises:
a valve cap movably sleeved on the top of the pressure detection valve, and a joint of the valve cap and the pressure detection valve is sealed;
the fixed component is clamped with the diaphragm and is abutted against the pressure balance mechanism of the lower cavity;
one end of the trigger rod is connected with the fixed component; the other end of the trigger rod is slidably plugged in the valve cap;
if the air pressure of the detected pipeline is normal, the valve cap is pulled outwards, so that the air pressure of the cavity and the two pressure balance mechanisms drive the diaphragm to bulge towards the upper cavity, and the diaphragm is in an initial tension state; if the air pressure is abnormal, the diaphragm cannot bulge up to the cavity, and the pressure detection valve is kept closed.
Further, the first pressure balancing mechanism further includes:
one end of the first spring is connected with the top of the valve body; the diaphragm bulges upwards, and the other end of the first spring abuts against the fixing component.
Further, the first pressure balancing mechanism further includes:
the detected sensing piece is arranged at the end part of the trigger rod, which is arranged in the valve cap;
the detection sensor is arranged in the valve cap and senses the sensed piece, and is connected with the controller and used for outputting an alarm signal.
Further, the pressure balancing mechanism of the lower chamber is a second pressure balancing mechanism, which includes:
the rocker arm mechanism is in driving connection with the valve rod; one end of the rocker arm mechanism is abutted with the pressure balance mechanism of the upper chamber, and the rocker arm mechanism and the diaphragm are in linkage with each other;
the valve rod is arranged between a gas interface and the lower cavity in a crossing way and is provided with a sealing plug for sealing the gas interface; the valve rod is driven by the rocker arm mechanism to open and close the gas interface.
Further, the rocker arm mechanism includes:
the transmission rod is movably arranged in the lower cavity, one end of the transmission rod is abutted against the diaphragm, and the other end of the transmission rod is suspended;
one end of the rocker arm penetrates through the transmission rod and is suspended in the air, and the other end of the rocker arm is in transmission connection with the valve rod;
the second spring is sleeved at the suspended end part of the transmission rod; one end of the second spring abuts against the end part of the rocker arm penetrating through the transmission rod, and the other end of the second spring abuts against the bottom of the hollow valve body.
Further, the pipe solenoid valve includes:
the hollow pipe body is internally provided with a first containing cavity and a second containing cavity which are mutually communicated;
a seal assembly movably disposed in the first chamber, the seal assembly comprising a magnetic metal member;
the electromagnetic driving assembly comprises a coil and a magnet, and the magnet is movably clamped between the coil and the hollow tube body; the coil is connected with the controller;
the electromagnetic driving assembly drives the sealing assembly to seal a communication port between the two cavities, and then the first cavity and the second cavity are isolated.
Further, the seal assembly further comprises:
the sealing rubber cushion is connected with the magnetic metal piece and is used for sealing and isolating the first containing cavity and the second containing cavity;
and one end of the third spring is abutted against the magnetic metal piece, and the other end of the third spring is abutted against the inner wall of the opening of the first accommodating cavity.
A safety monitoring method of a household gas pipeline comprises the following steps:
(1) A pressure detection valve and a pipeline electromagnetic valve are arranged between the gas input pipeline and the household pipeline and are connected through a controller; the pipeline electromagnetic valve is used for connecting a fuel gas input pipeline and the pressure detection valve; the pressure detection valve has the functions of under-pressure, overpressure, automatic closing under-pressure and manual resetting;
(2) The safety monitoring method comprises the following two states:
gas use state: the channels of the pressure detection valve and the pipeline electromagnetic valve are opened, and the gas input pipeline is communicated with the household pipeline for daily use of gas by a user; at this time, the pressure detection valve detects the air pressure of the whole pipeline; when the gas pressure of the gas pipeline is abnormal, the pressure detection valve outputs an alarm signal to the controller, and the controller controls the pipeline electromagnetic valve to be closed, and meanwhile, the pressure detection valve automatically closes the internal channel;
pipeline detection state: closing an internal channel of the pipeline electromagnetic valve through the controller to isolate the gas input pipeline and the household pipeline, and at the moment, monitoring whether the household pipeline is leaked or not by the pressure detection valve; if leakage occurs, the pressure abnormality causes the pressure detection valve to output an alarm signal to the controller, and the controller locks the internal passage in which the pipe solenoid valve has been closed, while the pressure detection valve self-closes the internal passage.
Compared with the prior art, the invention has the beneficial effects that:
1. the safety monitoring system can be directly arranged on a gas pipeline before the gas meter is arranged; the device adopts the diaphragm to carry out air pressure induction, and on one hand, the pressure detection valve can only enter into work when the air pressure of the detected pipeline is normal, so that the gas pressure of the detected pipeline is detected. On the other hand, the pressure detection valve has higher sensitivity, changes the traditional mode of installing a leakage detection device outside the pipeline, avoids the detection sensitivity problem that the sensitivity of the detection device is low or is influenced by external factors, has high reliability, can monitor the gas pressure condition in the pipeline in real time, and can discover tiny leakage and the like in time.
2. The both sides of the diaphragm of this device all are provided with pressure balance mechanism. Two pressure balance mechanisms and the tension of the diaphragm are changed by external force: a. when the air pressure of the detected pipeline is normal, the interaction forces of the two pressure balance mechanisms, the tension of the diaphragm and the air pressure are balanced, and at the moment, the diaphragm bulges upwards to be in an initial tension state, and the pressure detection valve starts to work. b. If the air pressure of the detected pipeline is abnormal, the diaphragm cannot bulge upwards, and the pressure detection valve is always in a closed state; and the controller cannot control the pipeline solenoid valve. Meanwhile, the pressure balance mechanism of the lower chamber is also connected with a rocker arm mechanism for opening and closing the gas interface, and the gas interface is completely closed by adopting a mechanical principle in the inner part, so that the structure is compact and reasonable, and the gas pressure balance mechanism is safer and more reliable.
3. In the pipeline detection state, even if the pressure detection valve cannot send an alarm signal when power fails, whether leakage occurs or not can be detected through the pressure detection valve, the pressure detection valve can automatically close a self-passage, the pressure detection valve cannot be opened any more due to leakage, and the gas interface is always in a closed state. When electricity is supplied, the safety monitoring system is in a double-insurance state, and the safety monitoring system can be restarted after the accident is completely solved.
4. The pressure detection valve and the pipeline electromagnetic valve are integrally arranged and connected into the gas pipeline at the same time, so that the arrangement of branch ports can be effectively reduced. Ensure the air tightness of the whole gas pipeline.
Drawings
The invention is described in further detail below with reference to the attached drawing figures, wherein:
FIG. 1 is a schematic diagram of a safety monitoring system for a home gas line of the present invention;
FIG. 2 is a cross-sectional view of a pressure sensing valve of a safety monitoring system for a home gas line of the present invention;
FIG. 3 is a cross-sectional view of a conduit solenoid valve of a safety monitoring system for a home gas line of the present invention;
in the figure: 1-pressure detection valve, 11-diaphragm, 12-upper chamber, 13-lower chamber, 14-valve cap, 2-second pressure balance mechanism, 21-valve rod, 211-sealing plug, 22-rocker arm mechanism, 221-transmission rod, 222-rocker arm, 223-second spring, 3-first pressure balance mechanism, 31-fixed component, 32-trigger rod, 321-tested sensing piece, 33-detection sensor, 34-first spring, 4-pipeline solenoid valve, 41-hollow tube body, 42-sealing component, 421-magnetic metal piece, 43-electromagnetic driving component, 431-coil and 432-magnet.
Detailed Description
The preferred embodiments of the present invention will be described below with reference to the accompanying drawings, it being understood that the preferred embodiments described herein are for illustration and explanation of the present invention only, and are not intended to limit the present invention.
The invention relates to a safety monitoring system of a household gas pipeline, which monitors gas by detecting the gas pressure in the pipeline. When the pipeline is in a detection state, if the pressure of the indoor gas pipeline is detected to be lower than a set value, the pipeline indicates that the indoor gas pipeline has leakage, a corresponding signal is output to give an alarm and a gas interface of the safety monitoring system is closed. When the gas is in a using state, if the detected gas pressure is higher than the set value, the abnormal state of the pressure in the pipeline is also indicated, and a signal alarm is output.
A safety monitoring method of a household gas pipeline comprises the following steps:
(1) A pressure detection valve and a pipeline electromagnetic valve are arranged between the gas input pipeline and the household pipeline and are connected through a controller; the pipeline electromagnetic valve is used for connecting a fuel gas input pipeline and the pressure detection valve; the pressure detection valve has the functions of under-pressure, overpressure, automatic closing under-pressure and manual resetting;
(2) The safety monitoring method comprises the following two states:
gas use state: the channels of the pressure detection valve and the pipeline electromagnetic valve are opened, and the gas input pipeline is communicated with the household pipeline for daily use of gas by a user; at this time, the pressure detection valve detects the air pressure of the whole pipeline; when the gas pressure of the gas pipeline is abnormal, the pressure detection valve outputs an alarm signal to the controller, and the controller controls the pipeline electromagnetic valve to be closed, and meanwhile, the pressure detection valve automatically closes the internal channel;
pipeline detection state: closing an internal channel of the pipeline electromagnetic valve through the controller to isolate the gas input pipeline and the household pipeline, and at the moment, monitoring whether the household pipeline is leaked or not by the pressure detection valve; if leakage occurs, the pressure abnormality causes the pressure detection valve to output an alarm signal to the controller, and the controller locks the internal passage in which the pipe solenoid valve has been closed, while the pressure detection valve self-closes the internal passage.
The above-described method of security monitoring is specifically achieved by the following embodiments 1 and 2.
Example 1
As shown in fig. 1 to 2, the safety monitoring system for a home gas pipeline according to the present invention includes a pressure detection valve 1, a pipeline electromagnetic valve 4 and a controller. The controller is respectively connected with the pressure detection valve 1 and the pipeline electromagnetic valve 4. The controller is used for controlling the action of the fixed solenoid valve, specifically, controlling the opening of the channel of the pipeline solenoid valve 4, the closing of the channel, and controlling the pipeline solenoid valve 4 to lock the closed channel. At the same time, the controller receives an alarm signal of the pressure detection valve 1, controls the passage of the pipe solenoid valve 4 to be closed, and controls the pipe solenoid valve 4 to lock the closed passage.
Specifically, the pressure detection valve 1 includes a valve body, a diaphragm 11, a first pressure balance mechanism 3, and a second pressure balance mechanism 2. The diaphragm 11 divides the chamber of the valve body into an upper chamber 12 and a lower chamber 13 which are not communicated with each other; the lower chamber 13 is provided with two gas interfaces; the first pressure balance mechanism 3 is arranged in the upper chamber 12 and is connected with the diaphragm 11; the second pressure balance mechanism 2 is arranged between the lower chamber 13 and a fuel gas interface in a crossing way; wherein, in the normal state, the membrane 11 is in an initial tension state; the change of the air pressure of the lower chamber 13 changes the tension of the diaphragm 11, so that the first pressure balance mechanism 3 acts and triggers an alarm signal, and the second pressure balance mechanism 2 closes the gas interface.
Specifically, the valve body includes an upper housing, a lower housing, and a diaphragm 11. When assembled, the upper shell and the lower shell are buckled together to form a cavity of the valve body, and the diaphragm 11 is positioned in the cavity of the valve body and divides the cavity of the valve body into an upper cavity 12 and a lower cavity 13 which are not communicated with each other. Wherein, the lower chamber 13, namely the part of the lower shell, is provided with two gas interfaces, and the two gas interfaces are connected with an integrated pipeline joint; the lower shell, the membrane 11 and the gas pipeline form a closed cavity; the air pressure of the lower chamber 13 is the same as the air pressure of the gas line. The cavity of the upper housing is not closed and the air pressure of the upper chamber 12 is atmospheric.
Wherein the top of the upper housing has a tubular projection that receives a bonnet 14. The middle part of the valve cap 14 is provided with a through hole communicated with the upper chamber 12. The bottom of the valve cap 14 is provided with an annular groove sleeved with a protruding part, and a part of the cap body of the valve cap 14 is embedded in the protruding part and is a pull plug; the other part is arranged outside the protruding part, and the contact part of the valve cap 14 and the protruding part can be arranged in a sealing way.
The first pressure balance mechanism 3 includes the above-described bonnet 14, the fixed assembly 31, the trigger lever 32, and the detection sensor 33. In particular, the securing assembly 31 includes a cleat and a support. The clamping plate is in a ring shape and is arranged in the upper chamber 12 and is clung to one side of the membrane 11; the support member is rivet-shaped, and one end of the protruding column penetrates through the membrane 11 and the clamping plate. The membrane 11 is clamped between the support column and the clamping plate, and the joint is sealed.
A trigger lever 32 having one end connected to the boss of the support column; the other end of the trigger lever 32 is slidably inserted into a through hole in the bonnet 14, and the end is provided with a sensing piece 321 to be measured, which is a magnet. The trigger lever 32 is plugged into the bonnet 14 such that the bonnet 14 closes the opening of the upper chamber 12. The detection sensor 33 includes a magnetic induction sensor and a signal emitting component. Preferably, the pull plug is provided with a raised snap ring in the through hole, and the outer wall of the trigger rod 32 is of a stepped structure matched with the snap ring. The snap ring of the pull plug and the step of the trigger lever 32 provide a fault tolerance space.
The operating principle of the bonnet 14, the diaphragm 11 and the pressure measuring device is as follows:
under the stable air pressure of the gas pipeline, the valve cap 14 is pulled outwards to drive the membrane 11 to bulge towards the upper cavity 12. At this time, the first spring 34 of the first pressure balance mechanism 3 is compressed, and the elastic force, the gas pressure, and the lever force of the second pressure balance mechanism 2 are rebalanced, so that the diaphragm 11 is in an initial tension state. The upward bulge of the diaphragm 11 drives the trigger lever 32 upward in the through hole of the bonnet 14. And closing the main valve of the indoor gas channel, and when the gas in the indoor pipeline leaks. The pressure of the lower chamber 13 is reduced, the tension state of the diaphragm 11 is correspondingly changed, the tension is released towards the lower chamber 13, the diaphragm 11 is reset, and the trigger rod 32 is driven to retract. The trigger rod 32 slides in the fault-tolerant space and does not drive the bonnet 14 to move downwards, so that the magnet on the trigger rod 32 is far away from the magnetic induction sensor on the bonnet 14, and an induction signal is generated and transmitted through the signal transmitting assembly, so that an alarm is given.
Preferably, the first pressure balance mechanism 3 further includes a first spring 34, and one end of the first spring 34 is connected to an inner wall of the boss of the upper housing. When abnormal air pressure increase occurs in the indoor gas pipeline, the pressure of the lower chamber 13 increases on the bulged membrane 11, the bulged amplitude increases, the trigger rod 32 continues to move upwards, and then the magnetic induction sensor on the valve cap 14 is far away from in the opposite direction of the magnet on the trigger rod 32, and induction signals are generated and transmitted through the signal transmitting assembly, so that an alarm is given. At this time, the other end of the first spring 34 abuts against the clamping plate on the diaphragm 11, so that the protective diaphragm 11 is deformed too much to be damaged.
A second pressure balancing mechanism 2 comprising a valve stem 21 and a rocker mechanism 22, said rocker mechanism 22 being movably arranged in a limit seat of the lower housing. One end of the valve rod 21 is connected with the rocker mechanism 22; the other end of the valve rod 21 penetrates through the gas interface, a sealing plug 211 is arranged at the end, and the action of the rocker arm mechanism 22 drives the valve rod 21 to move so as to realize the opening and closing of the gas interface.
Specifically, the rocker mechanism 22 includes a drive lever 221, a second spring 223, and a rocker arm 222. The transmission rod 221 is movably arranged in the limiting seat, and one end of the transmission rod 221 is abutted against the diaphragm 11. The other end of the transmission rod 221 is suspended, the second spring 223 is sleeved with the transmission rod 221 from the other end, and one end of the second spring 223 is connected with the bottom of the valve body. Specifically, the middle section of the transmission rod 221 is hollowed out, one end of the rocker arm 222 penetrates through the transmission rod 221 and is suspended, and the second spring 223 abuts against the end part of the rocker arm 222 penetrating through the transmission rod 221. The other end of the rocker arm 222 is in driving connection with the valve stem 21.
The principle of operation of the diaphragm 11 and linkage is as follows:
in the line detection state, the line solenoid valve 4 has been closed. If the household pipeline leaks, the pressure of the lower chamber 13 is reduced, the tension state of the diaphragm 11 is correspondingly changed, and the diaphragm 11 is reset. The diaphragm 11 abuts against the rocker arm mechanism 22, the transmission rod 221 is pressed down, meanwhile, the rocker arm 222 is driven to rotate, and the valve rod 21 is pulled to close the gas interface. Through this design, even when the power failure, the pressure measuring device can't send alarm signal, and pipeline solenoid valve 4 can't work, but close the gas interface through the built-in second pressure balance mechanism 2 of pressure detection valve 1, and then close the passageway of gas input. Ensuring the safety of the user.
Meanwhile, when the pipeline leaks, the pressure detection valve 1 cannot be opened, the diaphragm 11 cannot be raised upwards, and the rocker arm mechanism 22 closes the gas interface. The pressure detection valve 1 cannot be restarted until the accident is resolved. And the safety monitoring system and the pipeline electromagnetic valve 4 are in a double-insurance state, and the accident is solved, so that the safety monitoring system can be restarted.
The invention relates to a safety monitoring system of a household gas pipeline, which comprises the following working principles:
the safety monitoring system can be directly arranged on a gas pipeline before the gas meter is arranged; the device adopts the diaphragm to carry out air pressure induction, and on one hand, the pressure detection valve can only enter into work when the air pressure of the detected pipeline is normal, so that the gas pressure of the detected pipeline is detected. On the other hand, the pressure detection valve has higher sensitivity, changes the traditional mode of installing a leakage detection device outside the pipeline, avoids the detection sensitivity problem that the sensitivity of the detection device is low or is influenced by external factors, has high reliability, can monitor the gas pressure condition in the pipeline in real time, and can discover tiny leakage and the like in time.
The both sides of the diaphragm of this device all are provided with pressure balance mechanism. Two pressure balance mechanisms and the tension of the diaphragm are changed by external force: a. when the air pressure of the detected pipeline is normal, the interaction forces of the two pressure balance mechanisms, the tension of the diaphragm and the air pressure are balanced, and at the moment, the diaphragm bulges upwards to be in an initial tension state, and the pressure detection valve starts to work. b. If the air pressure of the detected pipeline is abnormal, the diaphragm cannot bulge upwards, and the pressure detection valve is always in a closed state; and the controller cannot control the pipeline solenoid valve. Meanwhile, the pressure balance mechanism of the lower chamber is also connected with a rocker arm mechanism for opening and closing the gas interface, and the gas interface is completely closed by adopting a mechanical principle in the inner part, so that the structure is compact and reasonable, and the gas pressure balance mechanism is safer and more reliable.
In the pipe detection state, even if the pressure detection valve cannot send an alarm signal at the time of power failure, whether leakage occurs or not can be detected through the pressure detection valve, and the pressure detection valve automatically closes the self-passage. The safety of a user is ensured through the mechanical structures and principles of the diaphragm, the pressure balance mechanism and the rocker arm assembly in the pressure detection valve. When electricity is supplied, the safety monitoring system is in a double-insurance state, and the safety monitoring system can be restarted after the accident is completely solved.
Example 2
The safety monitoring system for a home gas pipeline according to embodiment 2 is similar to the structure of embodiment 1, and the principle is the same, and specifically describes a pipeline electromagnetic valve:
the pipeline electromagnetic valve 4 comprises a hollow pipe body 41, a sealing assembly 42 and an electromagnetic driving assembly 43.
As shown in fig. 3, specifically, the inner wall of the hollow tube 41 has a stepped structure, so that the hollow tube 41 has a first cavity and a second cavity in parallel. The first accommodating cavity and the second accommodating cavity are cylindrical accommodating cavities, and the diameter of the first accommodating cavity is larger than that of the second accommodating cavity; the boundary plane between the two is a step platform of the step structure, which is in a ring shape.
The sealing assembly 42 includes a magnetic metal 421 and a sealing gasket disposed on the magnetic metal 421. The outer contour of the magnetic metal piece 421 is matched with the first accommodating cavity, and meanwhile, a plurality of concave fuel gas channels are formed in the outer wall of the magnetic metal piece 421. When the sealing rubber pad is contacted with the stepped platform, the first containing cavity and the second container are isolated, and then the sealing in the pipeline is realized. The magnetic metal is an iron block.
Specifically, the electromagnetic driving assembly 43 includes a bracket sleeved on the outer wall of the hollow tube body 41, a coil 431 wound on the bracket, a magnet 432 interposed between the coil 431 and the hollow tube body 41, and an aluminum case covering the bracket and the coil 431. The bracket is a wire spool, and an annular groove is concavely formed in the inner wall of the bracket and is used for accommodating the magnet 432. The magnet 432 is annular and is movable in the axial direction of the hollow tube 41 in the annular groove. The aluminum shell comprises an aluminum cover and an aluminum cover, and the butt joint of the aluminum cover and the aluminum cover completely shields the bracket and the coil 431, so that the protection and isolation effects are achieved.
The operating principle of the pipeline solenoid valve of this embodiment 2:
when the coil is powered on, the magnet moves along the axial direction of the hollow pipe body under the action of Lorentz force to drive the sealing assembly to move along the axial direction of the hollow pipe body until the sealing rubber pad is contacted with the stepped platform and is tightly attached to the stepped platform, so that the sealing of a pipeline is realized, and gas is prevented from passing through. When the pipeline needs to be opened, the coil is electrified again, and the current is reversed, at the moment, the electrified coil generates a Lorentz force opposite to the current, the magnet moves and enables the sealing assembly to move reversely, the sealing rubber pad is separated from the stepped platform, and the pipeline is opened.
In this embodiment, the sealing assembly preferably further includes a third spring disposed in the first cavity. One end of the third spring is connected with the magnetic metal piece, and the other end of the third spring is in propping connection with the inner wall of the first accommodating cavity. Through the design, when the gas channel is opened, the third spring prevents the sealing component from moving excessively, so that the function of the electromagnetic valve is lost, and the gas channel cannot be closed.
The present invention is not limited to the preferred embodiments, and any modifications, equivalent variations and modifications made to the above embodiments according to the technical principles of the present invention are within the scope of the technical proposal of the present invention.
Claims (9)
1. The safety monitoring system of the household gas pipeline is characterized by comprising a pressure detection valve, a pipeline electromagnetic valve and a controller, wherein the pressure detection valve and the pipeline electromagnetic valve are connected with each other, and the controller is respectively connected with the pressure detection valve and the pipeline electromagnetic valve; the pipeline electromagnetic valve is used for being connected with a fuel gas input pipeline, and the pressure detection valve is used for being connected with a household pipeline;
the chamber of the pressure detection valve comprises an upper chamber and a lower chamber, and the two chambers are isolated by a diaphragm; the two chambers are respectively provided with a pressure balance mechanism, one ends of the two pressure balance mechanisms are mutually abutted and are respectively positioned at two sides of the diaphragm; the lower chamber is provided with two fuel gas interfaces and a rocker mechanism for opening and closing the fuel gas interfaces, and the rocker mechanism is in driving connection with a pressure balance mechanism of the lower chamber;
when the pressure detection valve works, the diaphragm is in an initial tension state, and the rocker arm mechanism opens the gas interface; the air pressure of the lower chamber is changed, the tension state of the diaphragm is correspondingly changed, the air pressure abnormality causes the pressure balance mechanisms at the two sides to act to trigger an alarm signal, and the rocker arm mechanism closes the gas interface; the controller receives the alarm signal and controls the pipeline electromagnetic valve to act;
the controller controls the pipeline solenoid valve to act, and specifically controls the pipeline solenoid valve to close the channel and controls the pipeline solenoid valve to lock the closed channel.
2. The system of claim 1, wherein the pressure balancing mechanism of the upper chamber is a first pressure balancing mechanism comprising:
a valve cap movably sleeved on the top of the pressure detection valve, and a joint of the valve cap and the pressure detection valve is sealed;
the fixed component is clamped with the diaphragm and is abutted against the pressure balance mechanism of the lower cavity;
one end of the trigger rod is connected with the fixed component; the other end of the trigger rod is slidably plugged in the valve cap;
if the air pressure of the detected pipeline is normal, the valve cap is pulled outwards, so that the air pressure of the cavity and the two pressure balance mechanisms drive the diaphragm to bulge towards the upper cavity, and the diaphragm is in an initial tension state; if the air pressure is abnormal, the diaphragm cannot bulge up to the cavity, and the pressure detection valve is kept closed.
3. The home gas pipeline safety monitoring system of claim 2, wherein the first pressure balancing mechanism further comprises:
one end of the first spring is connected with the top of the pressure detection valve; the diaphragm bulges upwards, and the other end of the first spring abuts against the fixing component.
4. The home gas pipeline safety monitoring system of claim 2, wherein the first pressure balancing mechanism further comprises:
the detected sensing piece is arranged at the end part of the trigger rod, which is arranged in the valve cap;
the detection sensor is arranged in the valve cap and senses the sensed piece, and is connected with the controller and used for outputting an alarm signal.
5. The home gas pipeline safety monitoring system of claim 1, wherein the pressure balancing mechanism of the lower chamber is a second pressure balancing mechanism comprising:
the rocker arm mechanism is in driving connection with the valve rod; one end of the rocker arm mechanism is abutted with the pressure balance mechanism of the upper chamber, and the rocker arm mechanism and the diaphragm are in linkage with each other;
the valve rod is arranged between a gas interface and the lower cavity in a crossing way and is provided with a sealing plug for sealing the gas interface; the valve rod is driven by the rocker arm mechanism to open and close the gas interface.
6. The home gas pipeline safety monitoring system of claim 5, wherein the rocker arm mechanism comprises:
the transmission rod is movably arranged in the lower cavity, one end of the transmission rod is abutted against the diaphragm, and the other end of the transmission rod is suspended;
one end of the rocker arm penetrates through the transmission rod and is suspended in the air, and the other end of the rocker arm is in transmission connection with the valve rod;
the second spring is sleeved at the suspended end part of the transmission rod; one end of the second spring abuts against the end part of the rocker arm penetrating through the transmission rod, and the other end of the second spring abuts against the bottom of the hollow valve body.
7. The system for monitoring the safety of a household gas line according to claim 1, wherein the pipeline solenoid valve comprises:
the hollow pipe body is internally provided with a first containing cavity and a second containing cavity which are mutually communicated;
a seal assembly movably disposed in the first chamber, the seal assembly comprising a magnetic metal member;
the electromagnetic driving assembly comprises a coil and a magnet, and the magnet is movably clamped between the coil and the hollow tube body; the coil is connected with the controller;
the electromagnetic driving assembly drives the sealing assembly to seal a communication port between the two cavities, and then the first cavity and the second cavity are isolated.
8. The home gas pipeline safety monitoring system of claim 7, wherein the seal assembly further comprises:
the sealing rubber cushion is connected with the magnetic metal piece and is used for sealing and isolating the first containing cavity and the second containing cavity;
and one end of the third spring is abutted against the magnetic metal piece, and the other end of the third spring is abutted against the inner wall of the opening of the first accommodating cavity.
9. A safety monitoring method for a household gas pipeline is characterized by comprising the following steps of:
(1) A pressure detection valve and a pipeline electromagnetic valve are arranged between the gas input pipeline and the household pipeline and are connected through a controller; the pipeline electromagnetic valve is used for connecting a fuel gas input pipeline and the pressure detection valve; the pressure detection valve has the functions of under-pressure, overpressure, automatic closing under-pressure and manual resetting;
(2) The safety monitoring method comprises the following two states:
gas use state: the channels of the pressure detection valve and the pipeline electromagnetic valve are opened, and the gas input pipeline is communicated with the household pipeline for daily use of gas by a user; at this time, the pressure detection valve detects the air pressure of the whole pipeline; when the gas pressure of the gas pipeline is abnormal, the pressure detection valve outputs an alarm signal to the controller, and the controller controls the pipeline electromagnetic valve to be closed, and meanwhile, the pressure detection valve automatically closes the internal channel;
pipeline detection state: closing an internal channel of the pipeline electromagnetic valve through the controller to isolate the gas input pipeline and the household pipeline, and at the moment, monitoring whether the household pipeline is leaked or not by the pressure detection valve; if leakage occurs, the pressure abnormality causes the pressure detection valve to output an alarm signal to the controller, and the controller locks the internal passage in which the pipe solenoid valve has been closed, while the pressure detection valve self-closes the internal passage.
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| CN201810724960.0A CN108612890B (en) | 2018-07-04 | 2018-07-04 | Safety monitoring system of household gas pipeline |
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| CN109538945B (en) * | 2018-12-17 | 2023-10-27 | 东风富士汤姆森调温器有限公司 | Universal type vehicle-mounted fuel system leakage detection device |
| CN109827076B (en) * | 2019-04-09 | 2021-01-05 | 盐城市盐南高新区都市产业发展有限公司 | Domestic natural gas safety protection valve |
| CN110397849A (en) * | 2019-08-23 | 2019-11-01 | 深圳市前海三安盛科技有限公司 | A kind of gas leakage Online Monitoring Control System and method |
| CN110487474A (en) * | 2019-08-23 | 2019-11-22 | 深圳市前海三安盛科技有限公司 | A kind of pipeline air pressure induction alarm system |
| CN114658908A (en) * | 2020-12-22 | 2022-06-24 | 台山市意立达瓦斯器材有限公司 | Novel low-pressure gas pressure reducing valve |
| CN113108242B (en) * | 2021-03-24 | 2023-07-18 | 山东英信计算机技术有限公司 | Water cooling system with leak detection device and server |
| CN113915404B (en) * | 2021-10-29 | 2024-04-09 | 江苏拉斐尔模塑科技有限公司 | Hand-screwed air exhaust valve cap with air pressure detection and abnormal alarm functions |
| TWI783768B (en) * | 2021-11-02 | 2022-11-11 | 陽明產業有限公司 | Pipeline gas self-closing device |
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