CN212832811U - Alarm device for crane pipe under overvoltage protection - Google Patents
Alarm device for crane pipe under overvoltage protection Download PDFInfo
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- CN212832811U CN212832811U CN202021484133.8U CN202021484133U CN212832811U CN 212832811 U CN212832811 U CN 212832811U CN 202021484133 U CN202021484133 U CN 202021484133U CN 212832811 U CN212832811 U CN 212832811U
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- filling
- pressure switch
- gas phase
- pipeline
- alarm device
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Abstract
The utility model belongs to the technical field of the chemical industry safety in production, concretely relates to overload tube alarm device under overvoltage protection, including loading crane pipe and tank car down, loading crane pipe is including filling filler pipe line and gas phase pipeline down, and the one end that fills the filler pipe line is through filling the pump connection workbin, and the filling mouth of other end spread groove tank car, the top of tank car are equipped with the gas vent, and the gas vent passes through gas phase pipe connection oil gas recovery device, it is equipped with the feeding solenoid valve on the filler pipe line, the gas phase pipeline is close to the gas vent side and is equipped with pressure switch, and pressure switch connects audible-visual annunciator, and pressure switch's front side is equipped with the gas phase return valve, and pressure switch still connection director, controller connection feeding solenoid valve. The alarm device has simple structure and low modification cost, and can effectively avoid environmental pollution and safety accidents caused by overpressure condition in the loading process.
Description
Technical Field
The utility model belongs to the technical field of the chemical industry safety in production, concretely relates to overvoltage protection is loading arm alarm device down.
Background
In the article "safety improvement guide (trial) for liquefied and liquefied toxic gas automobile loading and unloading facilities in Shandong province" (Lu' an issue No. 2020/26): for combustible liquids such as gasoline, diesel oil, naphtha, solvent oil, alcohols and the like, a lower closed loading mode is recommended; still adopt the upper portion loading mode, should adopt the loading crane pipe under the liquid to guarantee that the crane pipe is laid and is put in place. In the current domestic tank car transportation hazardous chemical industry, most flammable liquids are transported by normal-pressure tank cars, so that the phenomenon of unsmooth gas phase discharge and overpressure risk of the normal-pressure tank cars are easily caused by adopting a lower-part loading mode.
During the process of filling the tank truck with the medium, the tank truck is generally filled by adopting a compressor or a pump. Because the compressor or the pump continuously works in the filling operation, if the gas phase connecting pipeline is not smooth in exhaust, the situation that the pressure in the storage tank is continuously increased or the pressure in the tank body exceeds the design pressure of the tank body is easily caused by continuously filling after the tank is full, at the moment, if a reliable safety means is not available, the tank body is broken to cause a safety accident, or the safety relief device is opened to cause the medium in the tank body to flow to the external environment to cause material loss and environmental pollution.
In addition, most transport tank trucks are only provided with a feed port and a gas phase port at present, and a safety device for controlling the feeding amount when the tank body of the tank truck is in overpressure is not arranged, so that the overpressure safety alarm for loading the loading arm under the loading arm is specially designed in order to ensure the safety of the tank truck in the loading process of a filling area of a factory.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing an overvoltage protection underloading oil filling riser alarm device, this alarm device simple structure, transformation expense are low to can effectively avoid taking place environmental pollution and the incident that the superpressure condition caused at the loading in-process.
The utility model discloses a realize through following technical scheme: the utility model provides an overvoltage protection lower loading arm alarm device, includes loading arm and tank car down, loading arm is including filling pipeline and gas phase pipeline down, and the one end that fills the pipeline is through filling the filling pump and connecting the workbin, and the filling mouth of other end spread groove tank car, and the top of tank car is equipped with the gas vent, and the gas vent passes through gas phase pipe connection oil gas recovery unit, its characterized in that, it is equipped with the feeding solenoid valve on the pipeline to fill, the gas phase pipeline is close to the gas vent side and is equipped with pressure switch, and pressure switch connects audible-visual annunciator, and pressure switch's front side is equipped with the gas phase return valve, and pressure switch still connection director, and feeding solenoid valve is connected to the.
Preferably, a manual valve is further provided on the charging line.
Preferably, the device also comprises an emergency stop button and a stop reset button, and both the emergency stop button and the stop reset button are connected with the controller.
The utility model has the advantages that:
1. the device can realize the quick cut-off of the feeding of the filling pipeline by overpressure by arranging the pressure switch interlocking cut-off feeding electromagnetic valve on the gas phase pipeline, thereby effectively avoiding environmental pollution and potential safety hazard caused by the overpressure condition in the loading process;
2. the device is provided with a striking audible and visual alarm, so that an operator can be warned in time when an overpressure condition occurs;
3. the emergency stop button is arranged on the device, so that an operator can perform manual emergency stop according to the actual filling condition, and unnecessary loss is avoided;
4. the device has simple structure and low cost, and is easy to reform, popularize and apply.
Drawings
Fig. 1 is a schematic structural view of the present invention;
in the figure, 1 tank truck, 101 filling port, 102 exhaust port, 2 filling pipeline, 3 gas phase pipeline, 4 feeding electromagnetic valve, 5 pressure switch, 6 gas phase loop valve, 7 audible and visual alarm, 8 controller and 9 manual valve.
Detailed Description
The present invention will be further described with reference to the accompanying drawings and specific embodiments.
As shown in figure 1, the alarm device for the lower loading arm of the overvoltage protection comprises a lower loading arm and a tank car 1, wherein the lower loading arm comprises a filling pipeline 2 and a gas phase pipeline 3, one end of the filling pipeline 2 is connected with a material box through a filling pump, the filling pump adopts a compressor or a pump, the other end of the filling pump is connected with a filling port 101 of the tank car 1, the filling pipeline 2 is provided with a feeding electromagnetic valve 4 and a manual valve 9 for controlling feeding, the top of the tank car 1 is provided with an exhaust port 102, the exhaust port 102 is connected with an oil gas recovery device through the gas phase pipeline 3, the side of the gas phase pipeline 3 close to the exhaust port 102 is provided with a pressure switch 5 for detecting the real-time pressure in the tank car 1, the pressure switch 5 is connected with a 12V safety power supply audible and visual alarm 7, the audible and visual alarm 7 is arranged at a striking position around the loading arm, the front side of the pressure switch 5 is also provided with a, the controller 8 is connected with the feeding electromagnetic valve 4, namely the pressure switch 5 converts the detected pressure into a switching signal, the switching signal is transmitted to the controller 8, and the controller 8 controls whether to cut off the feeding electromagnetic valve 4 according to the switching signal.
The device also comprises an emergency stop button and a stop reset button, wherein the emergency stop button and the reset stop button are both connected with the controller 8; when an emergency situation occurs, an operator can directly cut off the feeding electromagnetic valve 4 through the emergency stop button.
This device is through setting up pressure switch 5 on filling pipeline 2 to realize in case the overpressure condition takes place among the loading process with pressure switch 5 and feeding trip valve, audible-visual annunciator 7 interlocking, pressure switch 5 will be triggered, and at this moment, audible-visual annunciator 7 carries out audible-visual warning to on-the-spot operating personnel, and the feeding trip valve cuts off at once, and the overpressure condition is relieved and can resume work.
When the device is put into operation, the triggering pressure value of the pressure switch 5 is set to be the upper limit of the design pressure of the low-pressure normal-pressure tank car 1, once the pressure of the storage tank of the tank car 1 is higher than a set value in the feeding process, the pressure switch 5 acts to trigger the audible and visual alarm 7 and the feeding cut-off valve, when the pressure is recovered to be normally lower than the set value of the pressure of the storage tank, the audible and visual alarm 7 does not give an audible and visual alarm, a parking reset button needs to be manually operated by a person at the moment, and the feeding.
Other technical features than those described in the specification are known to those skilled in the art.
Claims (3)
1. An alarm device of an overvoltage protection underloading crane pipe comprises an underloading crane pipe and a tank truck (1), the lower loading arm comprises a filling pipeline (2) and a gas phase pipeline (3), one end of the filling pipeline (2) is connected with the material box through a filling pump, the other end of the filling pipeline is connected with a filling opening (101) of the tank car (1), the top of the tank car (1) is provided with an exhaust opening (102), the exhaust opening (102) is connected with an oil gas recovery device through the gas phase pipeline (3), it is characterized in that a feeding electromagnetic valve (4) is arranged on the filling pipeline (2), the gas phase pipeline (3) is provided with a pressure switch (5) close to the exhaust port (102), the pressure switch (5) is connected with an audible and visual alarm (7), the front side of the pressure switch (5) is provided with a gas phase loop valve (6), the pressure switch (5) is further connected with a controller (8), and the controller (8) is connected with a feeding electromagnetic valve (4).
2. An overpressure protection underloading arm alarm device as claimed in claim 1, characterized in that a manual valve (9) is also arranged in the filling line (2).
3. The overvoltage protection undermount crane pipe alarm device of claim 1, further comprising an emergency stop button and a park reset button, both of which are connected to the controller (8).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021484133.8U CN212832811U (en) | 2020-07-24 | 2020-07-24 | Alarm device for crane pipe under overvoltage protection |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021484133.8U CN212832811U (en) | 2020-07-24 | 2020-07-24 | Alarm device for crane pipe under overvoltage protection |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212832811U true CN212832811U (en) | 2021-03-30 |
Family
ID=75120986
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021484133.8U Active CN212832811U (en) | 2020-07-24 | 2020-07-24 | Alarm device for crane pipe under overvoltage protection |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212832811U (en) |
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2020
- 2020-07-24 CN CN202021484133.8U patent/CN212832811U/en active Active
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