CNG (compressed natural gas) charging and discharging column

Abstract

The utility model relates to the technical field of CNG (compressed natural gas), and discloses a CNG loading and unloading column which comprises a first electromagnetic valve, a first stop valve, a first one-way valve and a snap valve which are communicated in sequence. According to the utility model, the problem that gas filling and gas discharging are different and universal in the prior art is solved.

Description

Technical Field

[0001] This utility model relates to the field of CNG technology, specifically a CNG loading and unloading gas column. Background Technology

[0002] The existing CNG refueling column and CNG unloading column are two types of equipment used in different scenarios. CNG refueling columns are usually used in CNG mother stations to supply long-tube trailers with refueling, while CNG unloading columns are usually used in CNG daughter stations to supply long-tube trailers with unloading. The two have different logic control and operation methods and cannot be used interchangeably. Utility Model Content

[0003] To overcome the shortcomings of the existing technology, this utility model provides a CNG loading and unloading column, which solves the problem that the existing technology has different universality for loading and unloading.

[0004] The technical solution adopted by this utility model to solve the above problems is:

[0005] A CNG loading / unloading air column includes a first solenoid valve, a first shut-off valve, a first check valve, and a break-off valve connected in sequence.

[0006] As a preferred technical solution, the first shut-off valve is a manual emergency shut-off valve.

[0007] As a preferred technical solution, a flow meter connected to a first solenoid valve is included.

[0008] As a preferred technical solution, it includes an inlet valve connected to the flow meter.

[0009] As a preferred technical solution, the inlet valve is a ball valve.

[0010] As a preferred technical solution, the second solenoid valve, the second shut-off valve, and the second check valve are connected in sequence. The node between the first check valve and the break-off valve is connected to the second solenoid valve, and the node between the first solenoid valve and the flow meter is connected to the second check valve.

[0011] As a preferred technical solution, the second shut-off valve is a manual emergency shut-off valve.

[0012] As a preferred technical solution, it includes a first pressure transmitter, a second pressure transmitter, a node between a first check valve and a breakaway valve that is electrically connected to the first pressure transmitter, and a node between a first solenoid valve and a flow meter that is electrically connected to the second pressure transmitter.

[0013] As a preferred technical solution, the system includes a control system, with the first pressure transmitter and the second pressure transmitter electrically connected to the control system.

[0014] As a preferred technical solution, it includes a gas filling hose connected to the breakaway valve.

[0015] Compared with the prior art, this utility model has the following advantages:

[0016] (1) This utility model can be used for both gas filling and gas unloading processes;

[0017] (2) This utility model can also make a self-judgment of whether the operator’s current selected mode (gas filling, gas unloading) is correct, which can prevent misoperation and improve safety while being more humane. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the gas refueling process.

[0019] Figure 2 This is a schematic diagram of the gas unloading process. Detailed Implementation

[0020] The present invention will be further described in detail below with reference to the embodiments and accompanying drawings, but the implementation of the present invention is not limited thereto.

[0021] Example 1

[0022] like Figures 1 to 2 As shown, this utility model mainly solves the problem that both gas filling and gas unloading processes can be carried out in the same set of equipment (the same pipeline system); and it can automatically judge whether the operator's current selected mode (gas filling or gas unloading) is correct, which can prevent misoperation and improve safety while being more humane.

[0023] 1. Gas refueling process line 1

[0024] The medium is supplied via the equipment inlet ball valve (BV01), flow meter (FIQ01), solenoid valve (SV01), manual emergency shut-off valve (BV02), check valve (CV01), breakaway valve (BC01), and high-pressure hose (see...). Figure 1 ).

[0025] 2. Gas unloading process route 2

[0026] The medium is supplied via the equipment's high-pressure hose, breakaway valve, solenoid valve (SV02), and manual emergency shut-off valve (BV03).

[0027] The check valve (CV02), flow meter (FIQ01), and inlet ball valve (BV01) are used for unloading (see...). Figure 2 ).

[0028] 3. Control methods

[0029] When the gas refueling operation is started, the pressure transmitter (PT01 / PT02) sends the position signal to the control system. If the control system's set conditions are met, the solenoid valve (SV01) opens and the operation begins; otherwise, the gas refueling operation is not performed.

[0030] Similarly, when starting the gas unloading operation, the pressure transmitter (PT01 / PT02) sends the position signal to the control system. If the control system's set conditions are met, the solenoid valve (SV02) opens and the operation begins; otherwise, the gas filling operation is not performed.

[0031] Note: It should be noted that the solenoid valve is normally closed when it is not in operation.

[0032] It is worth noting that the control method does not involve any software innovation in terms of accepting point signals and determining whether the control system settings are met. These can be achieved using existing technologies, so the specific principles and processes are not elaborated further.

[0033] This utility model has the following features:

[0034] 1. The system can automatically determine and select the gas filling and unloading modes in terms of control.

[0035] 2. The structure combines the functions of filling and unfilling air, making it suitable for more occasions.

[0036] Functionality implemented:

[0037] This utility model allows for both gas filling and gas unloading on the same platform, reducing the amount of on-site equipment required and saving space.

[0038] As described above, this utility model can be implemented well.

[0039] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Any simple modifications, equivalent substitutions, and improvements made to the above embodiments based on the technical essence of the present utility model and within the spirit and principles of the present utility model shall still fall within the protection scope of the present utility model.

Claims

1. A CNG loading / unloading gas column, characterized in that, It includes a first solenoid valve, a first shut-off valve, a first check valve, and a breakaway valve connected in sequence; This includes the inlet valve connected to the flow meter; The second solenoid valve, the second shut-off valve, and the second check valve are connected in sequence. The node between the first check valve and the break-off valve is connected to the second solenoid valve. The node between the first solenoid valve and the flow meter is connected to the second check valve. It includes a first pressure transmitter, a second pressure transmitter, the node between the first check valve and the break-off valve is electrically connected to the first pressure transmitter, and the node between the first solenoid valve and the flow meter is electrically connected to the second pressure transmitter.

2. The CNG loading / unloading column according to claim 1, characterized in that, The first shut-off valve is a manual emergency shut-off valve.

3. A CNG loading / unloading column according to claim 1, characterized in that, This includes a flow meter that is connected to the first solenoid valve.

4. A CNG loading / unloading column according to claim 1, characterized in that, The inlet valve is a ball valve.

5. A CNG loading / unloading column according to claim 1, characterized in that, The second shut-off valve is a manual emergency shut-off valve.

6. A CNG loading / unloading column according to claim 1, characterized in that, The system includes a control system, and the first pressure transmitter and the second pressure transmitter are electrically connected to the control system.

7. A CNG loading / unloading column according to claim 1, characterized in that, This includes the gas refueling hose connected to the break-off valve.

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