CN219348543U - Gas density monitoring device with double-circuit monitoring and gas density relay - Google Patents
Gas density monitoring device with double-circuit monitoring and gas density relay Download PDFInfo
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- CN219348543U CN219348543U CN202223375948.4U CN202223375948U CN219348543U CN 219348543 U CN219348543 U CN 219348543U CN 202223375948 U CN202223375948 U CN 202223375948U CN 219348543 U CN219348543 U CN 219348543U
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Abstract
The utility model discloses a gas density monitoring device and a gas density relay with double-path monitoring, wherein the device comprises: the intelligent control system comprises a gas density relay body, a first pressure sensor, a second pressure sensor, a first temperature sensor, a second temperature sensor and an intelligent control unit; the gas relay can complete on-line monitoring of the gas density of the monitored electrical equipment through two-way signal acquisition; the gas density monitoring device has the advantages that manual maintenance is not needed in the gas density monitoring of the electrical equipment, the gas density relay can be diagnosed conveniently through the wireless communication unit, the on-site use is convenient, the efficiency is improved, the cost is reduced, and the reliability of a power grid is improved.
Description
Technical Field
The utility model relates to the technical field of electric power, in particular to a gas density monitoring device and a gas density relay with double-path monitoring, which are applied to high-voltage and medium-voltage electrical equipment.
Background
SF6 electrical equipment is electrical equipment that has been widely used in electrical power systems, and reliable operation thereof is also one of the important guarantees for stable power supply of electrical power systems. The density relay is an important device which is arranged on SF6 electrical equipment and used for monitoring the change of gas density, and the insulation performance of the SF6 electrical equipment is ensured. If the gas density is reduced to the corresponding threshold value, an alarm or a lock is generated to prevent a malignant explosion accident from being generated in the operation process of the SF6 electrical equipment. The quality of the density relay is directly related to whether the SF6 electrical equipment can normally operate. Therefore, in the power industry, the SF6 gas density relay is checked regularly.
The SF6 gas density relay on the SF6 electrical equipment is periodically checked, which is a necessary measure for preventing the SF6 electrical equipment from being operated safely and reliably; the SF6 gas density relay is required to be checked regularly in the electric power preventive test procedure and the twenty-five key requirements for preventing major accidents of electric power production; from the practical operation condition, the periodic verification of the SF6 gas density relay is one of the necessary means for ensuring the safe and reliable operation of the power equipment. The existing relay usually has only one path of monitoring, and after the data of the path is obtained by a user, whether the data is accurate or not is not determined.
Therefore, the relay is very required to provide accurate monitoring, has high intelligent degree, can perform self-maintenance detection, reduces operation and maintenance workload, and improves the reliability of the power grid.
Disclosure of Invention
The utility model provides a gas density monitoring device with double-path monitoring, which comprises: a relay housing, a gas density relay body and a connected relay connector;
the relay connector, the first pressure sensor, the second pressure sensor, the first temperature sensor, the second temperature sensor, the wireless communication unit verification unit and the intelligent control unit are interconnected through the multi-way connector;
the multi-way joint is provided with an interface for connecting equipment to be monitored;
the gas density relay body is respectively communicated with the first pressure sensor and the second pressure sensor;
the intelligent control unit is respectively connected with the first pressure sensor, the second pressure sensor, the first temperature sensor and the second temperature sensor to form two-way monitoring;
the verification unit is used for triggering the gas density relay body to generate contact signal actions and sampling alarm and/or locking contact signals of the gas density relay body;
the intelligent control unit is used for collecting contact signals of the gas density relay body detected by the first pressure sensor and the first temperature sensor or the second pressure sensor and the second temperature sensor and outputting two-way monitored induction signals;
the gas density relay body is used for monitoring the gas density and outputting an alarm and/or locking contact signal through the signal generator;
the wireless communication unit is connected with the intelligent control unit and is used for transmitting the monitoring data of the two-way sensor of the gas density relay or the data monitored by the intelligent control unit to the portable wireless reader.
Preferably, the verification unit includes: the micro control valve, the micro pressure controller and the contact signal sampling unit; one end of the micro control valve is provided with an interface communicated with a relay connector, and the other end of the micro control valve is communicated with the gas density relay body;
the gas circuit of the miniature pressure controller is communicated with the gas density relay body; the miniature pressure controller is used for adjusting the pressure rise and fall of the gas density relay body so as to enable the gas density relay body to generate contact signal actions;
the contact signal sampling unit is directly or indirectly connected with an alarm/locking contact of the gas density relay body and is used for sampling an alarm/locking contact signal of the gas density relay body;
the intelligent control unit is used for closing the micro control valve, so that the gas density relay is separated from the electrical equipment on the gas path.
Preferably, the micro pressure controller has a gas heating element.
Preferably, the first pressure sensor and the first temperature sensor, or the second pressure sensor and the second temperature sensor adopt a gas density transmitter composed of a pressure sensor and a temperature sensor; or alternatively, the process may be performed,
the first pressure sensor and the first temperature sensor or the second pressure sensor and the second temperature sensor adopt a density detection sensor adopting a quartz tuning fork technology.
Preferably, the intelligent control system further comprises a data display, wherein the data display mainly comprises liquid crystal or a nixie tube, and the data display is connected with the intelligent control unit; the data display can display on site including, but not limited to, gas density values, temperature values, pressure values, operating status indications.
Preferably, the data display may be provided on the relay housing; or alternatively, the process may be performed,
the data display can be connected with the intelligent control unit in a wireless or wired mode, and can also be arranged at a place outside the relay shell.
Preferably, the multi-way joint, the first pressure sensor, the second pressure sensor and the intelligent control unit are arranged at the front part of the relay shell, the gas density relay body, the first temperature sensor and the second temperature sensor are arranged at the rear part of the relay shell, and the relay joint is arranged on the relay shell.
Preferably, the method further comprises: and the wiring fault diagnosis unit is connected with the alarm or/and locking contact of the gas density relay, and outputs an indication signal to the intelligent control unit or indicates through an optical signal when the circuit is conducted.
Also provided is a gas density relay having a gas density monitoring device with two-way monitoring as defined in any one of the preceding claims.
The relay in the embodiment can realize the double-circuit monitoring of the gas density of the electrical equipment, a user receives double-circuit data, redundancy can be formed, manual maintenance is not needed, the reliability of a power grid is improved, the efficiency is improved, the relay has a self-detection function, the relay also has double-circuit data in the detection process, realizes self-detection and gas density monitoring, is double-circuit, and has the advantage of good stability.
Drawings
For a clearer description of the technical solutions of the embodiments of the present utility model, the drawings that are needed in the description of the embodiments will be briefly introduced below, it will be obvious that the drawings in the following description are some embodiments of the present utility model, and other drawings can be obtained according to these drawings without inventive effort for a person skilled in the art;
FIG. 1 is a schematic diagram of an intelligent gas density relay with dual-path monitoring according to an embodiment of the present utility model;
fig. 2 is a schematic diagram of a control circuit of an intelligent two-way monitoring gas density relay according to an embodiment of the present utility model.
The specific embodiment is as follows:
for the purpose of making the objects, technical solutions and advantages of the embodiments of the present utility model more apparent, the technical solutions of the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model, and it is apparent that the described embodiments are some embodiments of the present utility model, but not all embodiments of the present utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
Fig. 1 is a schematic diagram of a device structure of a dual-path monitoring relay of a gas density relay body for an electrical device according to an embodiment of the present utility model, and hatching in fig. 1 is a fixing frame for fixing components of the embodiment, and does not relate to a cross section of the structure. As shown in fig. 1, includes:
the gas density relay comprises a relay shell 10, a gas density relay body 1, a relay connector 5, a first pressure sensor 2A, a second pressure sensor 2B, a first temperature sensor 3A, a second temperature sensor 3B, an intelligent control unit 7, a multi-way connector 9, a wireless communication unit 11 and a gas supplementing interface 12;
the multi-way joint 9 is provided with an interface for connecting equipment to be monitored; the left side of the figure is connected with the electrical equipment 13 to be tested;
the gas density relay body 1 is fixed on the multi-way joint 9 through the relay joint 5, and the first pressure sensor 2A, the second pressure sensor 2B, the first temperature sensor 3A, the second temperature sensor 3B, the verification unit 4, the intelligent control unit 7, the wireless communication unit 11 and the air supplementing interface 12 are also arranged on the multi-way joint 9. As shown in fig. 1, on the gas path, the gas density relay body 1 is respectively communicated with the first pressure sensor 2A and the second pressure sensor 2B through a multi-way joint 9.
The intelligent control unit 7 is respectively connected with the first pressure sensor 2A, the second pressure sensor 2B, the first temperature sensor 3A and the second temperature sensor 3B to form two-way monitoring;
the verification unit 4 is used for triggering the gas density relay body to generate contact signal actions and sampling alarm and/or locking contact signals of the gas density relay body;
the intelligent control unit is used for collecting contact signals of the first pressure sensor and the first temperature sensor or detecting the gas density relay body by the second pressure sensor and the second temperature sensor and outputting two-path monitored induction signals;
the gas density relay body is used for monitoring the gas density and outputting an alarm and/or locking contact signal through the signal generator;
the wireless communication unit is connected with the intelligent control unit and is used for transmitting the monitoring data of the two-way sensor of the gas density relay or the data monitored by the intelligent control unit to the portable wireless reader.
Through the double-path monitoring, redundant monitoring can be realized, and the stability is good. In the self-detection process, the double-path detection can be realized, and the false judgment caused by one-path monitoring fault is avoided.
In an embodiment, the first pressure sensor and the first temperature sensor, or the second pressure sensor and the second temperature sensor employ a gas density transmitter composed of a pressure sensor and a temperature sensor; or alternatively, the process may be performed,
the first pressure sensor and the first temperature sensor or the second pressure sensor and the second temperature sensor adopt a density detection sensor adopting a quartz tuning fork technology.
In an embodiment, as shown in fig. 2, the intelligent control unit 7 is respectively connected with the first pressure sensor 2A, the second pressure sensor 2B, the first temperature sensor 3A, the second temperature sensor 3B and the verification unit 4; the checking unit 4 is used for controlling the gas density relay body 1 to generate contact signal action, sampling alarm and/or locking contact signals of the gas density relay body 1,
the verification unit 4 in this embodiment mainly includes: a micro control valve 402, a micro pressure controller 403, and a contact signal sampling unit 401; wherein, one end of the micro control valve 402 is provided with an interface communicated with the multi-way joint 9, and the other end of the micro control valve 402 is communicated with the electrical equipment 13; the gas path of the micro pressure controller 403 is communicated with the gas density relay body 1 through a multi-way joint 9; the micro pressure controller 403 is used for adjusting the pressure rise and fall of the gas density relay body 1, so that the gas density relay body 1 generates a contact signal action; the contact signal sampling unit 401 is directly or indirectly connected with the alarm/locking contact of the gas density relay body 1, and is used for sampling the alarm/locking contact signal of the gas density relay body 1;
the intelligent control unit 7 can open/close the micro control valve 402 so that the gas density relay body 1 is blocked from the electrical device 13 on the gas path. The monitoring is realized daily, and the gas circuit of the electric equipment 13 is disconnected in the self-detection process.
In this embodiment, the micro-control valve 402 may be a solenoid valve with sealing performance, or an electrically controlled valve; the micro pressure controller 403 mainly comprises an air chamber 4031, a heating element 4032 and a heat preservation element 4033.
The working principle or working process of the embodiment is as follows:
in an embodiment, the gas density relay body 1 may be of a commercially available type, and mainly includes a pressure detector 101, a temperature compensation element 102, and a signal generator 103 as a contact; the gas density is monitored by the action of the pressure detector 101 (a baron tube may be adopted) and the temperature compensation element 102 (a bimetallic strip may be adopted), and the monitoring of the gas density is realized by combining signals, and when the gas density is lower or/and higher than the set gas density, the signal generator 103 outputs an alarm and/or locking contact signal, so that the monitoring of the gas density of the gas chamber of the electrical equipment is realized.
The first pressure sensor 2A, the second pressure sensor 2B, the first temperature sensor 3A and the second temperature sensor 3B in the embodiment are respectively connected with the intelligent control unit 7; the intelligent control unit 7 acquires a pressure value P1 and a temperature value T1 acquired by the first pressure sensor 2A and the first temperature sensor 3A, and completes the on-line monitoring of the gas density of the monitored electrical equipment 13 by the gas relay; or, the intelligent control unit 7 acquires the pressure value P2 and the temperature value T2 acquired by the second pressure sensor 2B and the second temperature sensor 3B, so as to complete the on-line monitoring of the gas density of the electrical equipment 13 monitored by the gas relay. The intelligent control unit 7 collects the values of the sensors, determines whether to alarm or not, or transmits the values to the user for authentication in a wireless mode.
The micro pressure controller 403 in the detecting component is a closed air chamber 4031, a heating element 4032 is arranged outside or inside the closed air chamber 4031, a heat insulating piece 4033 is further arranged on the micro pressure controller 403 (heating and heat insulating), and the heat insulating piece 4033 is arranged outside the closed air chamber 4031, so that the working efficiency is improved.
Specifically, by heating the heating element 4032, the temperature of the gas in the closed gas chamber 4031 is changed, and thus the gas pressure is raised, the temperature is lowered, and the pressure is lowered.
The user can send a control signal to the intelligent control unit 7 to control the micro control valve 402 to be closed, so that the gas density relay body 1 is isolated from the electrical equipment 13 on the gas path. In the self-detection process, the gas circuit of the electric equipment 13 is disconnected.
The intelligent control unit 7 can realize the adjustment of the gas pressure rise and fall by triggering the action of the micro pressure controller 403. The monitoring device or the relay is adopted to send out an instruction, and the control loop of the gas density relay body 1 is disconnected through the intelligent control unit 7, specifically in the embodiment, the junctions J11 and J12 of the intermediate relay J1 of the junction signal sampling unit 401 are disconnected, so that the gas density relay body 1 cannot influence the safe operation of electrical equipment, and also cannot falsely send out an alarm signal or lock the control loop during diagnosis or verification.
And the junctions J21 and J22 of the intermediate relay J2 are closed, so that the junction PJ of the gas density relay body 1 is connected with the intelligent control unit 7.
The intelligent control unit 7 can realize two functions, one is daily monitoring of the gas density relay; the other is self-detection.
The micro control valve 402 can be closed by the intelligent control unit 7 to isolate the gas density relay body 1 from the electrical equipment 13 on the gas path.
The heating element 4032 can be controlled by the intelligent control unit 7 to heat until the required temperature is stopped; the pressure of the gas in the sealed gas chamber 4031 of the micro pressure controller 403 gradually decreases, so that the gas density relay body 1 generates an alarm or/and a locking contact signal action, the contact signal action is transmitted to the intelligent control unit 7 through the contact signal sampling unit 401, and the intelligent control unit 7 acquires the pressure value P1 and the temperature value T1 acquired by the first pressure sensor 2A and the first temperature sensor 3A when the contact signal action or switching of the gas density relay body 1 occurs, and sends the detected value to the user side of the network. The user converts the gas density value into a gas density value, and the online diagnosis of the gas density relay body 1 is completed.
Simultaneously/or when the intelligent control unit 7 obtains the pressure value P2 and the temperature value T2 collected by the second pressure sensor 2B and the second temperature sensor 3B when the gas density relay body 1 generates the contact signal action or the switching, the detected values are sent to the user side of the network. The user converts the gas density value into a gas density value, and the online diagnosis of the gas density relay body 1 is completed.
As shown in fig. 2, the intelligent control system can further comprise a data display 8, wherein the data display 8 mainly comprises a liquid crystal or a nixie tube, and the data display 8 is connected with the intelligent control unit 7; the data display 8 field can display information including, but not limited to, at least one of: gas density value, temperature value, pressure value, operating condition indication. The data display 8 may be arranged on the relay housing 10; alternatively, the data display may be connected to the intelligent control unit 7 by wireless or wired means, and the data display 8 may be disposed outside the relay case 10.
The wireless communication unit 11 such as wifi/bluetooth/4G and the like is also included; the wireless communication unit 11 is connected with the intelligent control unit 7, and the wireless communication unit 11 can be connected with a portable wireless reader, so that the collected test data of the density relay can be sent out through the wireless communication unit 11, and the portable wireless reader can conveniently and automatically obtain the test data, thereby facilitating the further analysis of the test data by operation and maintenance personnel.
In the implementation, the device can be further improved, and the calibrated special high-precision instrument can be connected to the air supplementing and inflating interface 12 of the monitoring device through a quick connector, and the high-precision instrument is connected with the monitoring device in a wireless mode. The gas density relay can be conveniently diagnosed and checked, the site use is convenient, and the efficiency is improved. Specifically, the operation of the high-precision instrument, the intelligent instrument can be realized by adopting the intelligent instrument in the prior art, and the command of starting the verification is clicked, so that a specific verification command is sent to the monitoring device to be verified. After receiving the instruction, the intelligent control unit 7 on the electronic circuit board of the monitoring device product starts to execute the command according to the related technical requirements or industry standard flow through the wireless communication unit 11. Meanwhile, even the state information is sent to a special software system in the background, and the state indication color of the corresponding position number is changed into a specific color (the color is easy to distinguish normal or abnormal). The monitoring device or relay product automatically executes the process without manual intervention, the high-precision instrument automatically reads the SF6 gas density of the monitoring device product through communication, and the SF6 gas density measured by the special high-precision instrument is compared point by point, so that a curve can be formed and stored in the high-precision instrument. Can also be conveniently exported.
Further comprises: and a plurality of wiring fault diagnosis units 6, wherein the wiring fault diagnosis units are used for diagnosing the wiring states of the alarm or/and locking contact points of the gas density relay, and when the wiring states of the alarm or/and locking contact points of the gas density relay are abnormal, the wiring fault diagnosis units output a signal to the intelligent control unit, and the intelligent control unit outputs or/and uploads wiring fault information of the contact points. As shown in fig. 2, the wiring fault diagnosis unit 6 of the present embodiment is mainly composed of a resistor R High height The optical coupler OC1, the resistor R1 and the resistor R2. The photoelectric coupler OC1 comprises a light emitting diode and a phototriode; as shown in fig. 2, in the contact control circuit, the cathode of the light emitting diode and one end of the cathode of the alarm contact PJ of the gas density relay body 1 are connected in parallel; anode and resistor R of the light-emitting diode High height Is connected in series with one end of the resistor R High height Is connected in parallel with the positive terminal of the alarm junction PJ of the gas density relay body 1, so that the light emitting diode and the resistor R of the optical coupler OC1 High height The alarm junction PJ of the gas density relay body 1 and the control loop of the junction PJ of the density relay body 1 are connected in series to form a loop. The collector of the phototriode is connected to a power supply VCC through a resistor R1, and the emitter of the phototriode is grounded through a resistor R2; the emitter of the phototriode is used as the output end of the wiring fault diagnosis unit 6 to be connected with the intelligent control unit 7. Wherein the resistance R High height According to the coil resistance matching of the intermediate control relay in the control loop of the junction PJ of the density relay body 1, the matching principle is as follows: normally, when the alarm junction PJ of the gas density relay body 1 is not operated, the resistor R High height The resistance value of (2) is so large that the intermediate control relay does not operate, i.e., the wiring fault diagnosis unit 6 does not affect the normal operation of the control loop of the junction PJ of the density relay body 1. When the junction wiring of the alarm junction PJ is accurately connected with the control loop of the junction PJ of the density relay body 1, the problem of disconnection or misconnection does not occur, the light-emitting diode of the optocoupler OC1 emits light, the phototriode is conducted by the light, and the emitter of the phototriode outputs high level; when the junction wiring of the alarm junction PJ cannot be accurately connected with the control loop of the junction PJ of the density relay body 1, for example, a problem of disconnection or misconnection occurs, the light emitting diode of the optocoupler OC1 does not emit light, the phototransistor is turned off, and the emitter of the phototransistor of the optocoupler OC1 outputs a low level. In this way, the wiring condition of the junction PJ of the density relay body 1 can be diagnosed and acquired by outputting the high-low level of the emitter of the phototransistor of the optocoupler OC1 of the wiring fault diagnosis unit 6. If the problem is abnormal, the intelligent control unit 7 can upload abnormal information to a background or target equipment through the communication module, so that problems can be found and processed timely or early, and the safe operation of the power grid is ensured.
In an embodiment, the intelligent control unit 7 may be implemented by using two chips U1 and U2, for example, an industrial MCU or a single chip microcomputer. The first chip 71 is used for realizing daily monitoring, and the other second chip 72 is used for self-detection of the relay. The user may initiate as appropriate.
The user can manually control the micro control valve 402 to be opened or closed during the detection process of the relay, or can use one of the two chips U1 and U2 to send a signal to be closed.
The relay self-detection can be realized by triggering the second chip 72, and the second chip 72 starts the verification unit 4 to realize double-path self-detection. Such as adding an external push button power switch, the control of each chip is individually controlled to start and stop.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present utility model, and not for limiting the same; although the utility model has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the utility model.
Any modification, equivalent replacement, improvement, etc. made in the embodiments of the present utility model shall fall within the scope of the present utility model, as long as they are within the spirit and principle of the present utility model.
Claims (9)
1. A gas density monitoring device with two-way monitoring, comprising: a relay housing, a gas density relay body and a connected relay connector;
the relay connector, the first pressure sensor, the second pressure sensor, the first temperature sensor, the second temperature sensor, the wireless communication unit, the verification unit and the intelligent control unit are interconnected through the multi-way connector;
the multi-way joint is provided with an interface for connecting equipment to be monitored;
the gas density relay body is respectively communicated with the first pressure sensor and the second pressure sensor;
the intelligent control unit is respectively connected with the first pressure sensor, the second pressure sensor, the first temperature sensor and the second temperature sensor to form two-way monitoring;
the verification unit is used for triggering the gas density relay body to generate contact signal actions and sampling alarm and/or locking contact signals of the gas density relay body;
the intelligent control unit is used for collecting contact signals of the gas density relay body detected by the first pressure sensor and the first temperature sensor or the second pressure sensor and the second temperature sensor and outputting two-way monitored induction signals;
the gas density relay body is used for monitoring the gas density and outputting an alarm and/or locking contact signal through the signal generator;
the wireless communication unit is connected with the intelligent control unit and is used for transmitting the monitoring data of the two-way sensor of the gas density relay or the data monitored by the intelligent control unit to the portable wireless reader.
2. The gas density monitoring device with two-way monitoring of claim 1, wherein the verification unit comprises: the micro control valve, the micro pressure controller and the contact signal sampling unit; one end of the micro control valve is provided with an interface communicated with a relay connector, and the other end of the micro control valve is communicated with the gas density relay body;
the gas circuit of the miniature pressure controller is communicated with the gas density relay body; the miniature pressure controller is used for adjusting the pressure rise and fall of the gas density relay body so as to enable the gas density relay body to generate contact signal actions;
the contact signal sampling unit is directly or indirectly connected with an alarm/locking contact of the gas density relay body and is used for sampling an alarm/locking contact signal of the gas density relay body;
the intelligent control unit is used for closing the micro control valve, so that the gas density relay is separated from the electrical equipment on the gas path.
3. The gas density monitoring device with two-way monitoring of claim 2, wherein the micro pressure controller has a gas heating element.
4. The gas density monitoring device with dual monitoring of claim 1, wherein the first pressure sensor and the first temperature sensor, or the second pressure sensor and the second temperature sensor employ a gas density transmitter composed of a pressure sensor and a temperature sensor; or alternatively, the process may be performed,
the first pressure sensor and the first temperature sensor or the second pressure sensor and the second temperature sensor adopt a density detection sensor adopting a quartz tuning fork technology.
5. The gas density monitoring device with two-way monitoring according to claim 1, further comprising a data display, wherein the data display mainly comprises a liquid crystal or a nixie tube, and the data display is connected with the intelligent control unit; the data display can display on site including, but not limited to, gas density values, temperature values, pressure values, operating status indications.
6. The gas density monitoring device with two-way monitoring of claim 5, wherein the data display can be provided on a relay housing; or alternatively, the process may be performed,
the data display can be connected with the intelligent control unit in a wireless or wired mode, and can also be arranged at a place outside the relay shell.
7. The gas density monitoring device with two-way monitoring of claim 1, wherein the multi-way junction, the first pressure sensor, the second pressure sensor, and the intelligent control unit are disposed at a front portion of the relay housing, and the gas density relay body, the first temperature sensor, and the second temperature sensor are disposed at a rear portion of the relay housing, and the relay junction is disposed on the relay housing.
8. The gas density monitoring device with two-way monitoring of claim 1, further comprising: and the wiring fault diagnosis unit is connected with the alarm or/and locking contact of the gas density relay, and outputs an indication signal to the intelligent control unit or indicates through an optical signal when the circuit is conducted.
9. A gas density relay having a gas density monitoring device with two-way monitoring as claimed in any one of claims 1 to 8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223375948.4U CN219348543U (en) | 2022-12-07 | 2022-12-07 | Gas density monitoring device with double-circuit monitoring and gas density relay |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223375948.4U CN219348543U (en) | 2022-12-07 | 2022-12-07 | Gas density monitoring device with double-circuit monitoring and gas density relay |
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| CN219348543U true CN219348543U (en) | 2023-07-14 |
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| CN202223375948.4U Active CN219348543U (en) | 2022-12-07 | 2022-12-07 | Gas density monitoring device with double-circuit monitoring and gas density relay |
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| CN (1) | CN219348543U (en) |
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