CN114487803B - Simulation Detection Method for Liquid Level Relay Stability - Google Patents
Simulation Detection Method for Liquid Level Relay StabilityInfo
- Publication number
- CN114487803B CN114487803B CN202210025871.3A CN202210025871A CN114487803B CN 114487803 B CN114487803 B CN 114487803B CN 202210025871 A CN202210025871 A CN 202210025871A CN 114487803 B CN114487803 B CN 114487803B
- Authority
- CN
- China
- Prior art keywords
- liquid level
- oil
- level relay
- alarm
- floating ball
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/327—Testing of circuit interrupters, switches or circuit-breakers
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Level Indicators Using A Float (AREA)
Abstract
本发明提供了一种液位继电器稳定性的模拟检测方法，使用模拟检测装置进行检测，模拟检测装置包括模拟油箱和报警器，模拟油箱包括箱体、上盖板和油泵，箱体中装有油；油泵具有两个出油口，油泵从箱体下部将油抽出，从箱体上部排出。本发明利用报警电路筛查质量不稳定的液位继电器，消除在线运行时出现的误报警动作。调节油箱中的油的液面高度，使浮球始终保持在上极限位置，作业过程仅需一个人，安装液位继电器、连接插头、接通油泵和报警器电源后，根据报警器的反应情况，就可以判断出被检测液位继电器的质量稳定性，检测可靠、高效。
The present invention provides a simulation detection method for the stability of a liquid level relay, which uses a simulation detection device for detection. The simulation detection device includes a simulation oil tank and an alarm. The simulation oil tank includes a box body, an upper cover plate, and an oil pump. The box body is filled with oil; the oil pump has two oil outlets, and the oil pump extracts the oil from the lower part of the box body and discharges it from the upper part of the box body. The present invention uses an alarm circuit to screen liquid level relays with unstable quality and eliminate false alarm actions that occur during online operation. The liquid level height of the oil in the oil tank is adjusted so that the float always remains at the upper limit position. The operation process only requires one person. After installing the liquid level relay, connecting the plug, and turning on the power of the oil pump and the alarm, the quality stability of the liquid level relay being tested can be judged based on the response of the alarm. The detection is reliable and efficient.
Description
Technical Field
The invention relates to the technical field of detection, in particular to a simulation detection method for the stability of a liquid level relay.
Background
The traction transformer oil tank of the train is filled with transformer oil, the liquid level relay detects the oil level height, the liquid level relay is provided with three control gears which are respectively high, low and low, when the oil level height is in the high position, the relay acts to cut off a power supply, when the oil level height is in the low position, an alarm signal is sent out, and when the oil level height is in the low position, the main loop is cut off. The liquid level relay may be due to quality problems, when the oil level in the oil tank is still at a high level, the contact of the liquid level relay is closed by mistake, so that a train sends out an error alarm, a train driver cannot judge whether the alarm is a low-level normal alarm or a high-level false alarm, if the alarm is a low-level normal alarm, the train driver is not treated but the liquid level is continuously reduced, and when the liquid level is reduced to a low level, the main power supply of the train is cut off by a vertical horse, so that major accidents occur. Therefore, the train operation has high requirements on various aspects, false alarm actions are not allowed to occur during on-line operation, and strict inspection is required before loading the liquid level relay. Currently, there are two detection modes:
1) Static detection, namely, the magnetic shielding cover of the liquid level relay is not detached, the liquid level relay is operated by a single person, the floating ball is stopped at the upper limit position (high position) or the lower limit position (low position) on the stem by utilizing gravity in a manner of standing and inverting the liquid level relay, and then the on-off state of the contact communicated with the stem is measured by utilizing the universal meter.
2) And (3) randomly and dynamically detecting, namely disassembling the magnetic shielding cover of the liquid level relay, wherein two persons cooperate, one person inverts the liquid level relay and dials the floating ball by hand, and the other person measures the on-off state of the contact communicated with the core column by using the universal meter.
The two methods have the following defects that the first detection method only can detect the on-off state of the contact, the measurement by using the universal meter needs the close fit of both hands and eyes, the labor intensity is very high, the second detection method needs double operation, one person is required to hold the liquid level relay upside down to stir the floating ball to rotate and shake, the action of the floating ball is extremely careful, if the floating ball is improperly forced, the floating ball is separated from the upper limit position, the contact is triggered to act, the movement of the floating ball is random, the actual running state difference is huge, the other person uses the universal meter to measure, the pointer is always pressed, and the eyes pay attention to observe the pointer and the universal meter all the time.
At present, a reliable and efficient mode is lacking, and the liquid level relay with unstable quality can be screened before the liquid level relay is installed.
Disclosure of Invention
Aiming at the defects, the invention provides a simulation detection method for the stability of the liquid level relay, which simulates the working conditions of shaking and rotating movement of a floating ball of the liquid level relay during on-line operation, screens the liquid level relay with unstable quality by using an alarm circuit and eliminates false alarm actions during on-line operation.
The simulation detection method for the stability of the liquid level relay is characterized by comprising the following steps of detecting by using a simulation detection device, wherein the simulation detection device comprises a simulation oil tank and an alarm, the simulation oil tank comprises a tank body, an upper cover plate and an oil pump, the tank body is filled with oil, the oil pump is provided with two oil outlets, the oil pump pumps the oil from the lower part of the tank body and discharges the oil from the upper part of the tank body, and the simulation detection device specifically comprises the following steps of:
s1, removing a magnetic shielding cover of a liquid level relay, and installing the liquid level relay on an analog oil tank;
s2, pouring oil into the box body;
s3, observing the liquid level of the oil in the box body to ensure that the floating ball always keeps at the upper limit position;
S4, stopping pouring oil into the box body;
s5, switching on an oil pump power supply, adjusting two oil outlets, enabling oil flows to wash on two sides of a floating ball in a staggered mode, enabling the floating ball to rotate, shake and rotate, enabling the floating ball to keep the maximum inclination, and simulating the working condition of a liquid level relay when equipment runs on line;
S6, electrically connecting the alarm with a quick socket of the liquid level relay;
S7, switching on a power supply of the alarm, and observing and recording the state of the alarm;
s8, if the alarm has no alarm signal during the detection period of the liquid level relay, the liquid level relay is qualified;
and S9, if the alarm has an alarm signal during the detection of the liquid level relay, the liquid level relay is abnormal, and an operator records abnormal information.
The invention relates to a simulation detection method for the stability of a liquid level relay and a simulation detection device used by the same, which are applied to an oil tank of a train traction transformer, and can simulate the working condition of the liquid level relay when the transformer runs on line only by using one set of simulation detection device. The tank body is used for storing transformer oil, and the oil level can be adjusted by increasing and decreasing the transformer oil so as to be kept at a certain height, so that enough buoyancy is generated for the floating ball of the liquid level relay arranged on the upper cover plate, and the floating ball is always kept at the upper limit position. The alarm is connected to the quick socket of the liquid level relay, and when the liquid level relay is closed by mistake at the upper limit position, the alarm gives an alarm.
Further, step S8, in the case that the alarm has no alarm signal, presses the manual test button on the liquid level relay again to test whether the float leaves the upper limit position, and ensures that the test is in the normal working state.
The liquid level relay comprises a socket, a floating ball and a manual testing button, wherein the manual testing button is used for testing whether the floating ball sends out a signal when leaving an upper limit position, and when the manual testing button is pressed down, a contact of the liquid level relay is closed to output a signal for detecting whether the signal output of equipment is normal.
Further, in step S4, the two oil outlets wash the floating ball in a staggered manner, so that the rotating speed of the floating ball is 1-2 revolutions per minute. The rotational speed of floater is 1~2 rotations per minute, and too fast can form the vortex near floater 2, pulls down floater 2 from last extreme position, and is too slow and not have detection efficiency, and the technician concludes through many times of experiments, and the rotational speed of floater 2 is 1~2 rotations per minute and accords with the detection requirement.
Further, the oil outlet of the oil pump is a three-way joint communicated with the oil pump outlet and a bamboo joint pipe communicated with two joints in the three-way joint, the two bamboo joint pipes are respectively arranged at two sides of the floating ball, the step S5 is to manually adjust the bamboo joint pipe to change the position and angle of the oil outlet, adjust the angle and position of the oil flow flushing floating ball to enable the oil flow to be flushed at two sides of the floating ball in a staggered manner, and the bamboo joint pipe is adjusted when the liquid level relay of the same type is only needed to be detected for the first time.
The bamboo joint pipe has certain rigidity, can be deformed at will under the stress, and is convenient for adjusting the position and the angle of the oil outlet so as to adjust the angle and the position of the oil flow flushing floating ball. The oil outlet can also be made of other pipelines which have certain rigidity and are easy to deform under the stress, and can also be made of pipelines which have high rigidity and are not easy to deform, but have a structure which can change the position and the angle of the oil outlet by an auxiliary device.
Further, the oil pump is arranged on the box body, and when the oil pump is detected, the box body is vibrated by vibration of the oil pump, so that the actual running working condition of the liquid level relay is simulated. The vibration energy simulates the actual running working condition of the liquid level relay.
Further, a relay and an alarm element are arranged in the alarm, and in step S9, when the quality of the liquid level relay is unstable and the contact points of the liquid level relay are closed by misoperation, the contact points of the relay respond, the alarm circuit is electrified, and the alarm element has alarm signals.
Furthermore, the alarm is connected with the socket of the liquid level relay through the plug, the alarm comprises a self-locking circuit, when the quality of the liquid level relay is unstable, the contact points of the liquid level relay are closed by misoperation, the alarm is switched on, and at the moment, whether the contact points of the liquid level relay are still closed or not, the circuit of the alarm is kept electrified, so that the record of a tester is facilitated.
The alarm captures the action signal of the liquid level relay contact and then converts the action signal into a continuous audible and visual alarm signal to remind an operator of recording, and other alarm modes such as a buzzer, an indicator lamp and the like can be adopted.
Preferably, the alarm element is an audible and visual alarm element. During detection, the alarm signal of the audible and visual alarm element is observed and fine-heard.
Further, in step S1, an upper cover plate is disposed at an upper portion of the simulated fuel tank, and the liquid level relay is fixedly mounted on the upper cover plate.
The invention has the following beneficial effects:
the simulation detection method of the stability of the liquid level relay is used for detecting the liquid level relay in the traction transformer oil tank, and the liquid level relay with unstable quality is screened by using an alarm circuit, so that false alarm actions during on-line operation are eliminated. The liquid level of the oil in the oil tank is regulated, so that the floating ball is always kept at the upper limit position, only one person is needed in the operation process, and the quality stability of the detected liquid level relay can be judged according to the reaction condition of the alarm after the liquid level relay, the connecting plug, the oil pump and the alarm are installed, and the detection is reliable and efficient.
Drawings
The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this specification, illustrate embodiments of the application and together with the description serve to explain the application. In the drawings:
FIG. 1 is a schematic diagram of the installation structure of a liquid level relay, an analog oil tank and an oil pump of an analog detection device of the liquid level relay.
FIG. 2 is a schematic diagram of the simulated detection device alarm structure of the liquid level relay.
1-Box, 2-floater, 3-quick socket, 4-bamboo festival pipe, 5-three way connection, 6-oil outlet pipe, 7-oil pump, 8-quick plug, 9-alarm device, KA 1-coil, KA 11-contact, KA 12-contact, SB-reset button, HA-alarm element.
Detailed Description
Embodiments of the invention are described in detail below with reference to the attached drawings, but the invention can be implemented in a number of different ways, which are defined and covered by the claims.
Example 1
The analog detection device for the liquid level relay comprises an analog oil tank and an alarm, as shown in fig. 1 and 2, wherein the analog oil tank comprises a tank body 1, an upper cover plate and an oil pump 7, the liquid level relay is arranged on the upper cover plate, a positioning structure is arranged on the upper cover plate so as to position the liquid level relay in an installation mode, oil is placed in the tank body 1, the height of an oil surface enables a floating ball 2 of the liquid level relay to be always kept at an upper limit position, the oil pump 7 is provided with an oil inlet pipe and an oil outlet pipe 6, the oil inlet pipe is communicated with the tank body 1 and is positioned at the lower part of the tank body 1, the oil outlet pipe 6 is communicated with the tank body 1 and is positioned at the upper part of the tank body 1, the oil outlet pipe 6 is connected with two bamboo joint pipes 4 through a three-way joint 5, the three-way joint 5 is fixed with the oil tank, oil outlets of the two bamboo joint pipes 4 are respectively arranged at two sides of the floating ball 2, the oil outlets of the two bamboo joint pipes 4 are different in height so that when the oil is discharged, the two oil outlets are alternately scoured by the floating ball 2, the alarm (comprising a quick plug 8 and an alarm 9) is connected to a quick socket 3 of the liquid level relay, and when the liquid level relay is closed at the upper limit position, and the alarm is in the upper limit position.
As shown in fig. 1, the quick socket 3 of the liquid level relay is located above the upper cover plate, and the floating ball 2 is located below the upper cover plate and immersed in oil.
The oil pump 7 is mounted on the casing 1.
The analog detection device of the liquid level relay is used for detecting the normally open liquid level relay of the contact, the alarm comprises a quick plug and an alarm device, the alarm device comprises a power supply, a reset button SB, an alarm element HA and an intermediate relay, the intermediate relay comprises a coil KA1 and two normally open contacts, the two normally open contacts are a contact KA11 (a contact I) and a contact KA12 (a contact II) respectively, one end of the reset button SB is connected with the positive pole of the power supply, the other end of the reset button SB is connected with two branches, one end of the reset button SB is connected with one end of the liquid level relay and one end of the coil KA1 in sequence through the quick plug 8 and the quick socket 3, the other end of the coil KA1 is connected with the negative pole of the power supply, the contact KA11 is connected with the liquid level relay in parallel for self-locking, the other end of the reset button SB is connected with one end of the contact II KA12, the other end of the alarm element HA is connected with the negative pole of the power supply.
The alarm element HA is an audible and visual alarm element.
The positioning structure on the upper cover plate is a groove, and the groove is matched with the mounting plate of the liquid level relay.
The analog detection device of the liquid level relay is used for detecting the liquid level relay in a traction transformer oil tank and eliminating the liquid level relay with unstable quality and false alarm action, the tank body 1 is used for storing transformer oil, a groove is formed in an upper cover plate and is beneficial to the installation of the liquid level relay, as shown in fig. 1, an oil pump 7 is connected with the tank body 1 through an oil pipe and is used for circularly flushing the transformer oil in the tank body 1 with a floating ball 2, a three-way joint 5 is fixed on the tank body 1, a bamboo joint pipe 4 is connected with an oil outlet of the oil pump 7 through the three-way joint 5 and the oil pipe, a plug of an alarm is a quick plug 8 and can be quickly separated from and combined with a quick socket 3 of the liquid level relay, and the alarm can capture signals of contacts of the liquid level relay and send continuous audible and visual alarm signals. If the quality of the liquid level relay is unstable, the contact points of the liquid level relay are closed by misoperation, the coil KA1 of the alarm is electrified, the two normally open contact points are closed, one contact point KA11 is self-locked, at the moment, whether the contact points of the liquid level relay are still closed or not, the coil KA1 is electrified, the contact points KA11 and KA12 are always closed, and the other contact point KA12 is communicated to enable the audible and visual alarm element HA to send an alarm to remind an operator that the liquid level relay is abnormal. The operator can record abnormal information, press a button to reset SB, release the alarm and remove the current liquid level relay. If the detection needs to be continued, only the liquid level relay to be detected needs to be reinstalled.
Example 2
A method for analog detection of traction transformer level relay stability using the analog detection apparatus of embodiment 1, comprising the steps of:
S1, removing a magnetic shielding cover of a liquid level relay, and installing the liquid level relay on an analog oil tank;
S2, pouring oil into a box body 1 of the simulated oil tank;
s3, observing the liquid level of the oil in the box body 1 to ensure that the floating ball 2 is always kept at the upper limit position;
s4, stopping pouring oil into the box body 1;
S5, switching on a power supply of an oil pump 7, manually adjusting a bamboo joint pipe 4 to change the position and angle of an oil outlet, adjusting the angle and position of an oil flow flushing floating ball 2, enabling the oil flow to be flushed at two sides of the floating ball 2 in a staggered manner, enabling the floating ball 2 to float, shake and rotate, enabling the rotating speed of the floating ball 2 to be 1-2 revolutions per minute, enabling the floating ball 2 to maintain the maximum inclination, and simulating the working condition of a liquid level relay when equipment runs on line;
s6, electrically connecting a quick plug 8 of the alarm with a quick socket 3 of the liquid level relay;
S7, switching on a power supply of the alarm, and observing and recording the state of the alarm;
S8, if the alarm has no alarm signal during the detection of the liquid level relay, then a manual test button on the liquid level relay is pressed to test whether the floating ball 2 leaves the upper limit position or not, and the liquid level relay is ensured to be in a normal working state if the liquid level relay sends out a signal;
s9, if the alarm has an alarm signal during the detection of the liquid level relay, the liquid level relay is abnormal, an operator records abnormal information, a reset button SB is pressed, an alarm circuit is disconnected, and the alarm stops alarming.
The simulation detection of the embodiment is characterized by comprising the following steps of 1, simulating an oil tank of a traction transformer, 2, simulating actual working conditions of floating, swinging and rotating of a floating ball 2 when the traction transformer is in operation, and 3, simulating the actual working conditions of vibration of the oil tank when the traction transformer is in operation. The simulation detection device can enable the floating ball 2 to float and keep at the upper limit position, the shaking and rotating state of the floating ball 2 is changed by adjusting the position of the bamboo joint pipe 4, the rotating speed of the floating ball is 1-2 revolutions per minute, a vortex can be formed near the floating ball 2, the floating ball 2 is pulled down from the upper limit position too slowly without detection efficiency, and a technician summarizes through multiple experiments that the rotating speed of the floating ball 2 is 1-2 revolutions per minute and meets detection requirements. The quick socket 3 is connected with the quick plug 8 of the alarm, so that the quick opening and closing of the quick socket and the quick plug can be ensured, the signal transmission is free from errors, the alarm can capture the abnormal signal of the liquid level relay and give out continuous alarm, the position of the bamboo joint pipe 4 is adjusted only when the detection is carried out for the first time, the liquid level relay is only required to be installed in the follow-up operation process, the quick plug 8 is connected, the oil pump 7 and the alarm power supply are connected, the operation intensity is reduced, the operation efficiency is improved, the reliability is enhanced, and the unstable liquid level relay is strictly eliminated.
The above description is only of the preferred embodiments of the present invention and is not intended to limit the present invention, but various modifications and variations can be made to the present invention by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (9)
1. A simulation detection method for the stability of a liquid level relay is characterized by comprising the steps of detecting by using a simulation detection device, wherein the simulation detection device comprises a simulation oil tank and an alarm, the simulation oil tank comprises a tank body, an upper cover plate and an oil pump, oil is filled in the tank body, the upper part of the simulation oil tank is provided with the upper cover plate, the liquid level relay is fixedly arranged on the upper cover plate, a quick socket of the liquid level relay is positioned above the upper cover plate, a floating ball is positioned below the upper cover plate and is soaked in the oil, the oil pump pumps the oil out from the lower part of the tank body and discharges the oil out from the upper part of the tank body, and the oil pump is provided with two oil outlets, and the simulation detection method specifically comprises the following steps:
s1, removing a magnetic shielding cover of a liquid level relay, and mounting the liquid level relay on an upper cover plate of an analog oil tank;
s2, pouring oil into the box body;
s3, observing the liquid level of the oil in the box body to ensure that the floating ball always keeps at the upper limit position;
S4, stopping pouring oil into the box body;
S5, switching on an oil pump power supply, adjusting two oil outlets, enabling oil flows to wash on two sides of a floating ball in a staggered mode, enabling the floating ball to shake and rotate, enabling the floating ball to keep the maximum inclination, and simulating the working condition of a liquid level relay when equipment runs on line;
S6, electrically connecting the alarm with a quick socket of the liquid level relay;
S7, switching on a power supply of the alarm, and observing and recording the state of the alarm;
s8, if the alarm has no alarm signal during the detection period of the liquid level relay, the liquid level relay is qualified;
and S9, if the alarm has an alarm signal during the detection of the liquid level relay, the liquid level relay is abnormal, and an operator records abnormal information.
2. The method for detecting the stability of the liquid level relay according to claim 1, wherein in step S8, when the alarm has no alarm signal, a manual test button on the liquid level relay is pressed again to test whether the floating ball leaves the upper limit position, the liquid level relay sends out a signal, so as to ensure that the test is in a normal working state.
3. The method for simulating the stability of a liquid level relay according to claim 1, wherein in the step S4, two oil outlets wash the floating ball in a staggered manner, so that the rotating speed of the floating ball is 1-2 revolutions per minute.
4. The method for simulating the stability of a liquid level relay according to claim 1, wherein the two oil outlets are respectively connected with an angle adjusting mechanism, and the step S5 is to adjust the angle adjusting mechanism to change the position and angle of the oil outlets and adjust the angle and position of the oil flow flushing floating ball so that the oil flows are alternately flushed on the two sides of the floating ball.
5. The simulation detection method of the stability of the liquid level relay according to claim 4, wherein the oil outlet of the oil pump is a three-way joint communicated with the oil pump outlet and a bamboo joint pipe communicated with two joints in the three-way joint, the two bamboo joint pipes are respectively arranged at two sides of the floating ball, the step S5 is to manually adjust the bamboo joint pipe to change the position and the angle of the oil outlet, adjust the angle and the position of the oil flow flushing floating ball, so that the oil flow is alternately flushed at the two sides of the floating ball, and the bamboo joint pipe is adjusted only when the liquid level relay of the same type is detected for the first time.
6. The method for simulating the stability of a liquid level relay according to claim 1, wherein an oil pump is mounted on the tank body, and vibration of the oil pump vibrates the simulated oil tank during the detection to simulate the actual operating condition of the liquid level relay.
7. The method for detecting the stability of a liquid level relay according to claim 1, wherein the relay and the alarm element are arranged in the alarm, and the alarm circuit is electrified when the liquid level relay is unstable in quality and the contact is closed by misoperation, and the alarm element has an alarm signal in step S9.
8. The method for simulating the stability of a liquid level relay according to claim 7, wherein the alarm is connected with a socket of the liquid level relay through a plug, the alarm comprises a self-locking circuit, when the quality of the liquid level relay is unstable, the contact points of the liquid level relay are closed by misoperation, and the alarm is switched on, so that whether the contact points of the liquid level relay are still closed or not, the circuit of the alarm is kept electrified, and the record of a tester is facilitated.
9. The method for simulating the stability of a liquid level relay according to claim 8, wherein the alarm element is an audible and visual alarm element, and wherein the audible and visual alarm element is adapted to observe and listen finely to the alarm signal during the detection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210025871.3A CN114487803B (en) | 2022-01-11 | 2022-01-11 | Simulation Detection Method for Liquid Level Relay Stability |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210025871.3A CN114487803B (en) | 2022-01-11 | 2022-01-11 | Simulation Detection Method for Liquid Level Relay Stability |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114487803A CN114487803A (en) | 2022-05-13 |
| CN114487803B true CN114487803B (en) | 2025-10-24 |
Family
ID=81510175
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210025871.3A Active CN114487803B (en) | 2022-01-11 | 2022-01-11 | Simulation Detection Method for Liquid Level Relay Stability |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114487803B (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN217331331U (en) * | 2022-01-11 | 2022-08-30 | 中车株洲电机有限公司 | Analog detection device of liquid level relay |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101007436B1 (en) * | 2007-11-12 | 2011-01-12 | 부산대학교 산학협력단 | Fault Location Detector of Float Level Sensor |
| CN203532053U (en) * | 2013-08-19 | 2014-04-09 | 深圳市沃尔奔达新能源股份有限公司 | Fuel oil warning device |
| CN109655135B (en) * | 2019-02-25 | 2023-11-24 | 中国长江电力股份有限公司 | Liquid level sensor calibration device and calibration method |
-
2022
- 2022-01-11 CN CN202210025871.3A patent/CN114487803B/en active Active
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN217331331U (en) * | 2022-01-11 | 2022-08-30 | 中车株洲电机有限公司 | Analog detection device of liquid level relay |
Also Published As
| Publication number | Publication date |
|---|---|
| CN114487803A (en) | 2022-05-13 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101452052B (en) | Gas relay calibration stand and calibration method thereof | |
| CN104569652A (en) | Gas fixed-value checking table for simulating heavy gas fault realization of transformer and checking method | |
| CN204241592U (en) | The gas fixed value checking platform that a kind of analogue transformer grave gas fault realizes | |
| CN204952041U (en) | Fire -fighting water pump patrols and examines controlling means | |
| CN114487803B (en) | Simulation Detection Method for Liquid Level Relay Stability | |
| CN217331331U (en) | Analog detection device of liquid level relay | |
| CN109745760A (en) | Performance testing system and method of marine ballast water filter | |
| CN111638100A (en) | Automatic exhaust and gas taking device for transformer | |
| US6405580B2 (en) | Apparatus for detecting and measuring foam forming compounds in aqueous solutions | |
| CN110652885A (en) | Flat ceramic membrane filtering performance testing equipment and testing method | |
| US6640618B2 (en) | Method for detecting and measuring foam forming compounds in aqueous solutions | |
| CN211236043U (en) | A dynamic simulation automatic test system for vehicle solenoid valve | |
| CN207769332U (en) | A kind of filter element of water purifier replaces alarm and cleaning device | |
| CN219496362U (en) | Mobile detection equipment for SDI value | |
| CN111128597B (en) | A light gas relay device | |
| CN203672460U (en) | Special liquid level meter for oil and gas field and with filtering device | |
| CN112908775B (en) | Multifunctional float type gas relay | |
| CN110297143A (en) | A kind of vehicle electromagnetic valve dynamic analog Auto-Test System | |
| CN214226816U (en) | Multifunctional float-type gas relay | |
| CN211404396U (en) | A light gas relay device | |
| CN212643022U (en) | Wall hanging is circulating water pump's for stove test system | |
| CN117451958A (en) | An environmental monitoring device for surface water pollution prevention and control | |
| CN117688332A (en) | Anomaly detection method, system, electronic device and storage medium | |
| JP5475076B2 (en) | Residual chlorine meter with water level change detection function | |
| CN203189235U (en) | Air pressure system cooling water discharge device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |