CN216345377U - Prevent LNG of precooling maloperation and add mechanism of qi - Google Patents

Abstract

The utility model discloses an LNG (liquefied natural gas) dispenser capable of preventing precooling misoperation, which comprises a liquid supply pipeline, a PLC (programmable logic controller), a circulating encounter cold liquid return detection device, an electric control device and a liquid supply pump, wherein the PLC and the circulating encounter cold liquid return detection device are respectively connected with the electric control device, the circulating encounter cold liquid return detection device is installed in the liquid supply pipeline, the liquid supply pump is installed at the input end of the liquid supply pipeline, and the liquid supply pump is connected with the PLC. The working principle and the method are used for judging whether the large circulation flow of the LNG dispenser is normally carried out or not by additionally arranging the temperature sensor in the LNG dispenser to detect whether liquid flows in the gas return pipeline or not.

Description

Prevent LNG of precooling maloperation and add mechanism of qi

Technical Field

The utility model relates to the field of LNG (liquefied natural gas) dispenser equipment, in particular to an LNG dispenser capable of preventing precooling misoperation.

Background

With the promotion of the national double-carbon energy-saving emission-reducing strategy, the popularization and application of natural gas in China are increasing day by day, and especially in the field of passenger cars and trucks, the original diesel heavy trucks are changed into Liquefied Natural Gas (LNG) at a time. Liquefied natural gas has an ultra-low temperature characteristic, has a combustible characteristic after being rapidly gasified, and is more and more emphasized in the industry for efficiently and safely using the liquefied natural gas.

When the conventional mainstream LNG dispenser is used for large-cycle precooling, the detection and judgment of the circulating precooling return liquid are not carried out. The filling gun is inserted into the air return gun seat of the LNG filling machine or inserted into the gun inserting seat of the filled vehicle, large-cycle precooling operation can be carried out, and the LNG filling machine cannot detect. Therefore, when a gas station filler performs a large-cycle precooling, the gas station filler may lose part of LNG due to misoperation, and the gas station may be unnecessarily lost.

SUMMERY OF THE UTILITY MODEL

Aiming at the problems, the utility model provides the LNG dispenser for preventing the precooling misoperation, and a function for preventing the large-cycle precooling misoperation is added to solve the problems.

The utility model is realized by the following technical scheme:

the utility model provides a prevent LNG of precooling maloperation and add mechanism of qi, meets cold liquid check out test set, electrical control equipment and feed pump including supply liquid pipeline, PLC controller, circulation, meet cold liquid check out test set and connect electrical control equipment respectively, the circulation meets cold liquid check out test set and installs in supply liquid pipeline, the feed pump is installed in supply liquid pipeline's input, the PLC controller is connected to the feed pump.

Further, the liquid check out test set is returned in the cold meeting of circulation is temperature sensor, temperature sensor is through setting up in LNG adds the mechanism of qi inside, carries out temperature detection to LNG adds the mechanism of qi internal integration return.

Further, the temperature sensor is of the type FST 600.

Furthermore, the electric control equipment is further connected with an emergency safety actuator, and the emergency safety actuator is installed on a liquid supply pipeline of the LNG dispenser.

Furthermore, the emergency safety actuator is a low-temperature valve control device.

Further, the model of the low-temperature valve control device is DJ 661F.

Further, the electric control equipment is JQP06-JCS 2.

Furthermore, the PLC is JQ-PLC-SS 2.

The utility model has the beneficial effects that:

(1) the working principle and the method are that whether the liquid flows in the gas return pipeline is detected by additionally arranging the temperature sensor in the LNG dispenser, so that whether the large circulation flow of the LNG dispenser is normally carried out is judged;

(2) when abnormal large-cycle precooling operation occurs, the LNG dispenser makes identification judgment and then emergently stops precooling operation through the low-temperature valve control device. Automatically controlled equipment can upload to backstage PLC controller with urgent valve closing command, and the PLC controller stops the rear end liquid feed pump in step, prevents that the pipeline from appearing holding the pressure phenomenon, accomplishes dual protection mechanism, finally avoids LNG to add the condition that the mechanism was decreased because of artificial maloperation has taken place the liquid.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without inventive exercise.

Fig. 1 is a system structure diagram of a safety supervision integrated platform field inspection device according to an embodiment of the present invention;

fig. 2 is a system schematic flow chart of a safety supervision integrated platform field inspection device according to an embodiment of the present invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to examples and accompanying drawings, and the exemplary embodiments and descriptions thereof are only used for explaining the present invention and are not meant to limit the present invention.

Example 1

As fig. 1, this embodiment provides a prevent LNG that precooling maloperation adds mechanism of qi, meet cold liquid check out test set, electrical control equipment and feed pump including liquid supply pipeline, PLC controller, circulation, meet cold liquid check out test set and connect electrical control equipment respectively, the circulation meets cold liquid check out test set and installs in liquid supply pipeline, the feed pump is installed in liquid supply pipeline's input, the PLC controller is connected to the feed pump.

Example 2

On embodiment 1's basis, this embodiment further provides a prevent concrete structure of LNG that precools maloperation adds mechanism of qi, wherein, the circulation meets cold liquid check out test set back for temperature sensor, temperature sensor is through setting up inside LNG adds the mechanism of qi, adds the mechanism of qi internal integration back to LNG and carries out temperature detection.

Further, the temperature sensor is of the type FST 600.

Furthermore, the electric control equipment is further connected with an emergency safety actuator, and the emergency safety actuator is installed on a liquid supply pipeline of the LNG dispenser.

Furthermore, the emergency safety actuator is a low-temperature valve control device.

Further, the model of the low-temperature valve control device is DJ 661F.

Further, the electric control equipment is JQP06-JCS 2.

Furthermore, the PLC is JQ-PLC-SS 2.

Specifically, the specific implementation principle flow of this embodiment is as follows:

as shown in fig. 2, the LNG dispenser is internally integrated with a return air temperature monitoring sensor, and the value of the temperature sensor is acquired in real time through the LNG dispenser, so that whether the large-cycle precooling operation of the LNG dispenser is normally performed or not is determined, and if the temperature abnormality occurs, the large-cycle precooling process can be automatically stopped, and a user is prompted to perform corresponding operation.

The electric control equipment realizes the data acquisition of all sensors and the control of pipeline valves, completes the operation processing according to the data acquired in real time and finally sends out corresponding action instructions.

When abnormal large-cycle precooling operation occurs, the LNG dispenser makes identification and judgment, and then the precooling operation is stopped emergently through the low-temperature valve control device. Automatically controlled equipment can upload to backstage PLC controller with urgent valve closing command, and the PLC controller stops the rear end liquid feed pump in step, prevents that the pipeline from appearing holding the pressure phenomenon, accomplishes dual protection mechanism, finally avoids LNG to add the condition that the mechanism was decreased because of artificial maloperation has taken place the liquid.

The working principle and the method are used for judging whether the large circulation flow of the LNG dispenser is normally carried out or not by additionally arranging the temperature sensor in the LNG dispenser to detect whether liquid flows in the gas return pipeline or not. The temperature sensor and the control valve designed in the utility model can be replaced by similar products, but also belong to the design idea of the utility model and are within the protection scope of the utility model.

The foregoing shows and describes the general principles and broad features of the present invention and advantages thereof. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the utility model as claimed. The scope of the utility model is defined by the appended claims and equivalents thereof.

Claims (8)

1. The utility model provides a prevent LNG of precooling maloperation and add mechanism of qi, its characterized in that meets cold liquid check out test set, electrical equipment and feed pump including liquid supply pipeline, PLC controller, circulation meet cold liquid check out test set and connect electrical equipment respectively, the circulation meets cold liquid check out test set and installs in liquid supply pipeline, the feed pump is installed in liquid supply pipeline's input, the PLC controller is connected to the feed pump.

2. The LNG dispenser capable of preventing precooling misoperation according to claim 1, wherein the circulating encounter cold liquid return detection device is a temperature sensor, and the temperature sensor is arranged inside the LNG dispenser to perform temperature detection on the integrated return of the inside of the LNG dispenser.

3. The pre-cooling misoperation prevention LNG dispenser according to claim 2, wherein the temperature sensor is of the type FST 600.

4. The LNG dispenser capable of preventing precooling misoperation according to claim 1, wherein the electric control device is further connected with an emergency safety actuator, and the emergency safety actuator is mounted on a liquid supply pipeline of the LNG dispenser.

5. The pre-cooling misoperation prevention LNG dispenser according to claim 4, wherein the emergency safety actuator is a cryogenic valve control device.

6. The pre-cooling misoperation prevention LNG dispenser of claim 5, wherein the cryogenic valve control device is DJ 661F.

7. The pre-cooling misoperation prevention LNG dispenser according to claim 1, wherein the electric control equipment is JQP06-JCS 2.

8. The pre-cooling misoperation prevention LNG dispenser according to claim 1, wherein the PLC is JQ-PLC-SS 2.

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