Intelligent loading control system based on multi-safety interlocking

Abstract

The utility model relates to the field of quantitative loading intelligent control of loading sledges, in particular to an intelligent loading control system based on multi-safety interlocking, which comprises a loading process pipeline, a PLC (programmable logic controller) batch controller, a combustible gas alarm, a crane pipe homing device, a key management device and a touch display screen. The loading process pipeline comprises a loading crane pipe process pipeline, a safety valve group process pipeline, a pressure transmitter, a mass flow meter, a pneumatic stop valve and a pneumatic control valve; the pressure transmitter is used for detecting the filling pressure in the loading process, and the mass flow meter is used for detecting the filling speed and the accumulative loading capacity in the loading process; the pneumatic stop valve is opened and closed through the PLC batch controller; the pneumatic regulating valve realizes medium filling flow regulation through the PLC batch controller; the PLC batch controller is used for collecting various parameters in the loading process and controlling valve opening and closing adjustment and multi-interlocking safety control. According to the utility model, the labor intensity of operators is effectively reduced, and the safety of a loading site is improved.

Description

Technical Field

[0001] The utility model relates to the field of quantitative loading intelligent control of a loading skid, in particular to an intelligent loading control system based on multiple safety interlocks. Background Art

[0002] A loading skid is a common logistics loading and unloading tool, mainly used to load and unload various goods into and out of trucks. It is a special tool and technology that can be used for transportation and handling work in various scenarios. The design and selection of loading skids take into account several key factors to ensure its efficiency and safety. For example, in an oil depot, loading skids can refer to two different modes of operation: loading skids on oil depots and loading skids on the bottom. Loading skids on oil depots involve inserting the refueling gun into the oil inlet on the top of the tanker tank for refueling. At this time, the staff uses a weighing skid bar as a support, which is connected to the frame of the tanker to bear the weight of the tanker and ensure that the tanker remains level. After refueling is completed, the skid bar is disassembled and removed from the top of the tank. In addition, there is an LNG loading skid, which is a skid-mounted facility that integrates the instruments and equipment in the LNG loading crane position into a dedicated frame structure, and realizes the integration of prefabrication, integrated assembly and testing in the factory. The loading skid mainly consists of a pair of loading and return air cranes, flowmeter, static alarm controller, pressure transmitter, loading flow control valve, emergency shut-off valve, related pipelines and batch controller, etc. After the system strength, air tightness and system function tests are carried out in the factory, the loading skid that passes the system test can be shipped out of the factory for use.

[0003] There are many liquid products and large loading volumes at loading stations. The traditional tank truck filling mode has a high degree of manual participation. The filling process relies on manual operation of valve switches, and the loading volume relies on manual control and adjustment. There are problems such as misoperation during the filling process and inaccurate loading measurement. Moreover, manual misoperation can easily cause overloading, overpressure, medium overflow, etc. of the tank truck, posing a major safety hazard. Utility Model Content

[0004] The utility model aims to provide an intelligent loading control system based on multiple safety interlocks, which has the characteristics of reducing the labor intensity of operators and improving the safety of loading site.

[0005] The above technical objectives of the utility model are achieved through the following technical solutions: an intelligent loading control system based on multi-safety interlocking:

[0006] PLC batch controller, used to collect various parameters during loading, control valve switch adjustment during loading, and multi-interlock safety control;

[0007] Loading process pipelines, including venting pipelines, gas medium pipelines, liquid medium pipelines, nitrogen pipelines, and loading crane process pipelines;

[0008] The liquid medium pipeline is provided with a mass flow meter, a pneumatic shut-off valve, a pneumatic regulating valve, a safety valve group process pipeline, and a pressure transmitter, and the pressure transmitter, the mass flow meter, the pneumatic shut-off valve, and the pneumatic regulating valve are all electrically connected to the PLC batch controller;

[0009] The gas phase medium pipeline is also provided with a pressure transmitter, which is also electrically connected to the PLC batch controller;

[0010] The pressure transmitter is used to detect the filling pressure during the loading process, and the mass flow meter is used to detect the filling speed and cumulative loading volume during the loading process, so as to realize quantitative filling control and provide a safety interlock parameter for the PLC batch controller respectively;

[0011] The pneumatic shut-off valve is opened and closed by the control of the PLC batch controller, and is used to start and cut off the medium filling; the pneumatic regulating valve is controlled by the PLC batch controller to adjust the medium filling flow rate, and is used to control the speed of the medium filling.

[0012] Preferably, it also includes a combustible gas alarm, a crane pipe return device, a key management device, and a touch display screen.

[0013] Preferably, the combustible gas alarm is arranged at the loading station to collect the combustible gas concentration in the loading station environment.

[0014] Preferably, the crane pipe returning device is used to lock the loading crane pipe and detect the returning status of the loading crane pipe.

[0015] Preferably, the key management device is used to place tank truck keys and determine the key placement status.

[0016] Preferably, the touch screen is used to display various parameters and valve switch status during the loading process, and input the tank truck loading volume through manual operation to provide pre-installed data for tank truck filling.

[0017] Preferably, the pressure transmitter, mass flow meter, combustible gas alarm, crane pipe return device, and key management device each provide a safety interlock parameter for the PLC batch controller to form a set of multi-safety interlock control systems. If any one or more of the safety interlock parameters are abnormal, the PLC batch control system quickly stops the filling operation to ensure the safety of the loading site.

[0018] In summary, the utility model has the following beneficial effects:

[0019] The intelligent loading control system based on multiple safety interlocks provided by the utility model can control the opening and closing and adjustment of valves through a PLC batch controller, realize automatic and accurate quantitative loading, improve filling efficiency, and reduce the labor intensity of operators. At the same time, the intelligent control system has multiple safety interlock mechanisms to improve the safety of filling operations. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a system schematic diagram of the utility model.

[0021] In the figure, 1. Crane pipe process pipeline; 2. Safety valve group process pipeline; 3. Pressure transmitter; 4. Mass flow meter; 5. Pneumatic shut-off valve; 6. Pneumatic regulating valve. DETAILED DESCRIPTION

[0022] The utility model is further described in detail below in conjunction with the accompanying drawings.

[0023] This specific embodiment is merely an explanation of the present invention and is not a limitation of the present invention. After reading this specification, those skilled in the art may make non-creative modifications to the present embodiment as needed. However, as long as they are within the scope of the claims of the present invention, they are protected by the patent law.

[0024] Example:

[0025] An intelligent loading control system based on multi-safety interlocking

[0026] like Figure 1 As shown, it includes loading process pipeline, PLC batch controller, combustible gas alarm, crane pipe return device, electrostatic controller, key management device, touch display screen, etc. Among them, the combustible gas alarm, crane pipe return device, electrostatic controller, key management device, touch display screen are all electrically connected to the PLC batch controller.

[0027] The loading process pipeline includes the crane pipe process pipeline 1, the safety valve group process pipeline 2, the pressure transmitter 3, the mass flow meter 4, the pneumatic shut-off valve 5, the pneumatic regulating valve 6, as well as the venting pipeline, the gas medium pipeline, the liquid medium pipeline and the nitrogen pipeline.

[0028] The process pipeline 2 of the safety valve group is arranged on the liquid medium pipeline.

[0029] There are two pressure transmitters 3, which are installed on the gas phase medium pipeline and the liquid phase medium pipeline respectively. The two pressure transmitters 3 are electrically connected to the PLC batch controller respectively.

[0030] The mass flow meter 4, the pneumatic shut-off valve 5, and the pneumatic regulating valve 6 are all arranged in the liquid medium pipeline, and the mass flow meter 4, the pneumatic shut-off valve 5, and the pneumatic regulating valve 6 are electrically connected to the PLC batch controller respectively.

[0031] The pressure transmitter 3 is used to detect the filling pressure during the loading process, and the mass flow meter 4 is used to detect the filling speed and cumulative loading volume during the loading process to achieve quantitative filling control and provide a safety interlock parameter for the PLC batch controller.

[0032] The pneumatic shut-off valve 5 is opened and closed by the control of the PLC batch controller, and is used to start and cut off the medium filling.

[0033] The pneumatic regulating valve 6 realizes medium filling flow regulation through the control of the PLC batch controller, which is used to control the speed of medium filling.

[0034] The PLC batch controller is the "brain" of the loading control system. It is used to collect various parameters during the loading process, control the valve switch adjustment during the loading process, and perform multi-interlock safety control.

[0035] The combustible gas alarm is used to collect the combustible gas concentration in the loading station environment and provide a safety interlock parameter for the PLC batch controller.

[0036] The crane pipe return device is used to lock the loading crane pipe and detect the return status of the loading crane pipe, providing a safety interlock parameter for the PLC batch controller.

[0037] The key management device is used to place the tank truck keys, judge the key placement status, and provide a safety interlock parameter for the PLC batch controller.

[0038] The touch screen is used to display various parameters and valve switch status during the loading process. The tank truck loading volume can also be input manually to provide pre-installed data for tank truck filling.

[0039] The pressure transmitter, mass flow meter, combustible gas alarm, crane pipe return device and key management device each provide a safety interlock parameter for the PLC batch controller to form a set of multi-safety interlock control systems. If any one or more of the safety interlock parameters are abnormal, the PLC batch control system can quickly stop the filling operation to ensure the safety of the loading site.

Claims

1. An intelligent loading control system based on multiple safety interlocks, characterized in that: PLC batch controller, used to collect various parameters during loading, control valve switch adjustment during loading, and multi-interlock safety control; Loading process pipelines, including venting pipelines, gas medium pipelines, liquid medium pipelines, nitrogen pipelines, and loading crane process pipelines (1); The liquid medium pipeline is provided with a mass flow meter (4), a pneumatic shut-off valve (5), a pneumatic regulating valve (6), a safety valve group process pipeline (2), and a pressure transmitter (3); the pressure transmitter (3), the mass flow meter (4), the pneumatic shut-off valve (5), and the pneumatic regulating valve (6) are all electrically connected to a PLC batch controller; The gas phase medium pipeline is also provided with a pressure transmitter (3), and the pressure transmitter (3) is also electrically connected to the PLC batch controller; The pressure transmitter (3) is used to detect the filling pressure during the loading process, and the mass flow meter (4) is used to detect the filling speed and the cumulative loading volume during the loading process, so as to realize quantitative filling control and provide a safety interlock parameter for the PLC batch controller respectively; The pneumatic shut-off valve (5) is opened and closed by the control of the PLC batch controller, and is used to start and cut off the medium filling; the pneumatic regulating valve (6) is controlled by the PLC batch controller to adjust the medium filling flow rate, and is used to control the speed of the medium filling.

2. According to claim 1, the intelligent loading control system based on multiple safety interlocks is characterized in that: It also includes a combustible gas alarm, a crane pipe return device, a key management device, and a touch display screen.

3. The intelligent loading control system based on multi-safety interlocking according to claim 2 is characterized in that: The combustible gas alarm is arranged at the loading station and is used to collect the combustible gas concentration in the loading station environment.

4. The intelligent loading control system based on multiple safety interlocks according to claim 2 is characterized in that: The crane pipe returning device is used to lock the loading crane pipe and detect the returning state of the loading crane pipe.

5. The intelligent loading control system based on multiple safety interlocks according to claim 2 is characterized in that: The key management device is used to place tank truck keys and determine the key placement status.

6. The intelligent loading control system based on multiple safety interlocks according to claim 2 is characterized in that: The touch display screen is used to display various parameters and valve switch status during the loading process, and input the tank truck loading volume through manual operation to provide pre-installed data for tank truck filling.

7. The intelligent loading control system based on multiple safety interlocks according to claim 2 is characterized in that: The pressure transmitter (3), mass flow meter (4), combustible gas alarm, crane pipe return device, and key management device respectively provide a safety interlock parameter for the PLC batch controller to form a group of multiple safety interlock control systems. If any one or more of the safety interlock parameters are abnormal, the PLC batch control system quickly stops the filling operation to ensure the safety of the loading site.

Images