RU2807537C2 - Device for filling high pressure cylinders with industrial gases - Google Patents

Abstract

FIELD: high-pressure vessels.

SUBSTANCE: invention relates to devices for filling high-pressure vessels with gases. The device contains a central manifold consisting of a vertical adapter with a safety valve, made integral with a horizontal pipe, on the left and right ends of which pipe brackets are installed, consisting of a nipple and a nut screwed onto the pipe, equipped with a gasket. The left and right high-pressure manifolds are installed and secured in the brackets with nuts, each of which consists of a pipe equipped with three outlet lines made in the form of branch pipes with valves and compensator coils. An electromagnetic valve, a pressure sensor and a temperature sensor are installed at the inlet of each of the manifolds, and a gas relief valve is installed at the outlet. The outputs of the mentioned sensors are connected to the measuring inputs of a control unit made on the basis of an industrial controller equipped with an Ethernet interface, high-speed inputs, transistor and relay outputs, with a human-machine interface connected to it via the RS-232 interface, and analogue input modules.

EFFECT: ability to automate the process of filling high-pressure cylinders with inert gases.

7 cl, 2 dwg

Description

The invention relates to devices for filling high-pressure vessels with gases in a compressed, liquefied or solid state and can be used as part of cryogenic complexes for filling cylinders, which are systems consisting of discharge ramps, filling and monoblock cylinders.

A mobile gas filling complex is known from the prior art (RU 61838U1, IPC F17C 5/06, published 03/10/2007). The complex includes a vehicle on which gas vessels are mounted, grouped into sections by means of gas fittings, a control module for gas filling and distribution to consumers, as well as a booster unit made in the form of a hydraulic compressor, the outlet of which is connected by pipelines containing shut-off valves. valves, with vessels of each section, and each of the vessel sections is equipped with an individual pipeline with a shut-off valve for filling with compressed gas.

The disadvantage of the known complex is the difficulty of adapting it for use as part of cryogenic complexes for filling cylinders.

The closest technical solution to the claimed invention and chosen as a prototype was recognized as a device for filling acetylene cylinders (SU 1673777 A2, IPC F17C 5/00, published on August 30, 1991]. The device contains a pneumatic cylinder with a hollow rod and a docking head. The pneumatic cylinder through a pipe and the bypass valve is connected to the main acetylene gas pipeline. The connecting head is connected to the shut-off valve, the bypass valve is equipped with a control lever that interacts with the pipe. The pneumatic cylinder is mounted on a rotating bracket. The device has a container for placing cylinders with a lid on which a mechanical lock is attached for connecting to the container.

The disadvantage of the known device for filling cylinders with acetylene is the absence in its design of automation units that allow measuring and monitoring the pressure and temperature in the cylinders with the ability to automatically control the actuators that ensure filling the cylinders with gas.

The technical problem to be solved by the claimed invention is to provide the ability to control the pressure and temperature of inert gases in the manifolds of filling ramps of cryogenic complexes with automatic control of the ramp actuators, namely electromechanical valves and vacuum pumps used for filling cylinders.

This problem is solved in that the device for filling high-pressure cylinders with industrial gases contains a central manifold consisting of a vertical adapter with a safety valve made integral with a horizontal pipe, on the left and right ends of which pipe brackets are installed, consisting of a nipple and a nut screwed onto the pipe equipped with a gasket. The left and right high-pressure manifolds are installed and secured in the brackets with nuts, each of which consists of a pipe equipped with three outlet lines made in the form of branch pipes with valves and compensator coils. An electromagnetic valve, a pressure sensor and a temperature sensor are installed at the inlet of each of the manifolds, and a gas relief valve is installed at the outlet. The outputs of the mentioned sensors are connected to the measuring inputs of the control unit, made on the basis of an industrial controller, equipped with an Ethernet interface, high-speed inputs, transistor and relay outputs, with a human-machine interface connected to it via the RS-232 interface, and analog input modules, while the measuring inputs of the control unit are inputs of analog input modules, the first high-speed input of the controller is configured to connect a digital pressure sensor to it, the first and second relay outputs of the industrial controller are connected to the solenoid valves of the left and right manifolds, and its transistor output is configured to connect to a vacuum vacuum line pump.

A positive technical result provided by the combination of device features disclosed above is the ability to automate the process of filling high-pressure cylinders with inert gases through the use of sensors in the device design that allow monitoring the filling process by measuring the pressure and temperature of the fluid in the manifolds, as well as power outputs , allowing for automatically controlled switching on and off of high-pressure collectors from the central manifold, as well as programmatic adjustment of the pump speed.

The invention is illustrated by drawings, where in Fig. 1 shows the appearance of the device in isometric projection; in fig. Figure 2 shows a block diagram of the device's control unit.

A device for filling high-pressure cylinders with industrial gases has the following design.

The device contains a central manifold consisting of a vertical adapter 1 with a safety valve, made integral with a horizontal pipe 2, on the left and right ends of which pipe brackets 3 are installed, consisting of a nipple and a nut 4 screwed onto the pipe, equipped with a gasket. In the brackets 3, the left and right high-pressure manifolds 5 and 6 are installed and secured with nuts 4, each of which consists of a pipe equipped with three outlet lines made in the form of pipes with valves 7 and compensator coils 8. At the inlet of each of the manifolds 5 and 6, solenoid valves 9, 10, pressure sensors 11, 12 and temperature sensors 13, 14 are installed, and at the outlet there is a gas relief valve 15. The outputs of the mentioned sensors 11, 12, 13, 14 are connected to the measuring inputs 16, 17, 18, 19 of the control unit, made on the basis of an industrial controller 20, equipped with an Ethernet interface 21, high-speed inputs, transistor and relay outputs, with a connection to it via RS-232 interface, human-machine interface 22, and analog input modules 23, while the measuring inputs 16, 17, 18, 19 of the control unit are inputs of analog input modules, the first high-speed input 24 of the controller 20 is made with the ability to connect a digital pressure sensor to it 25, the first and second relay outputs 26 and 27 of the industrial controller 20 are connected to the electromagnetic valves 9, 10 of the left and right manifolds 5 and 6, and the transistor output 28 is configured to be connected to the vacuum pump 29 of the evacuation line. Additionally, below the left 5 and right 6 pressure manifolds there are racks 30 for installing refillable cylinders on them.

Piezoelectric pressure sensors with a charge output signal can be used as pressure sensors 11, 12, for example models 36559315_A-10 ¹ ( ¹ Products. 36559315_A-10 // Pneumax. Online store. URL: https://shop.pneumax.ru/ catalog/pth_а_10_datchik_davleniya_proportsionalnyy/36559315_а_10_datchik_davleniya_0_400_bar_4_20ma/ (access date 07/01/2021), designed for pressures from 0 to 40 MPa and output current 4÷20 mA, equipped with a threaded connector G 1/4''. 13, 14 can be used as temperature sensors submersible sensors PT100/PT1000 ² ( ² Temperature sensors based on PT100/PT1000 // MegaSensor. URL: https://megasensor.com/products/datchiki-temperatury-na-baze-ptl00-ptl000-i-termopary/ (date of access 07/01/2021]) with a range of measured temperatures from -65 to +200 ° C. As a digital pressure sensor 25, it is advisable to use a PSAN series device, for example, a sensor for measuring vacuum pressure PSAN-V01CPA-RC1/8 ³ ( ³ Series pressure sensor PSAN // RusAutomation. URL: https://rusautomation.ru/datchiki davleniya/datchik-davleniya-psan (accessed 07/01/2021), providing precision pressure measurement in the range from 0 to -101.3 kPa.

As an industrial controller 22, a Modicon M241 series logic controller can be used, for example TM241CE24R ⁴ ( ⁴ Catalog 2015 // Modicon M241 and M251 logic controllers. URL: https://www.is-com.ru/files/cat_%D0% 9C241_М251_2015.pdf (accessed 07/01/2021)., powered by an AC power source from 100 to 240 V, having 14 24 V DC sink/source inputs, 8 high-speed inputs, 4 high-speed transistor outputs and 6 relay outputs. As analog input modules, TM3AI4 modules can be used, having 4 current/voltage inputs from -10 to +10 V DC / 0 to 20 mA with an analog-to-digital converter resolution of 12 bits. The operator touch panel model HMI GXU3512 can be used as a human-machine interface.

A device for filling high-pressure cylinders with industrial gases operates as follows.

Initially, the cylinders to be refilled are installed on racks 30, their adapters are connected to the compensator coils 9, the gas discharge valves 15 are closed and the valves 7 are opened. A vacuum line with a digital pressure sensor 25 pre-installed on it is connected to the adapter 1 of the central manifold, while the output of the latter is switched with the first high-speed input 24 of the industrial controller 20, and the transistor output 28 is connected to the vacuum pump 29. Then the device is connected using an Ethernet interface to a remote SCADA system for supervisory control and data acquisition. Further actions are performed using sensors and actuators of the device in automatic mode based on the control program stored in the program memory of the controller 20 or in semi-automatic mode, while commands to perform actions are given by the operator using the touch panel 22, which implements a human-machine interface, or using a remote SCADA system.

Using relay outputs 26, 27, controller 20 opens solenoid valves 9, 10, using transistor output 28 activates vacuum pump 29 and begins measuring pressure in the vacuum line using digital pressure sensor 25 by iteratively polling high-speed input 24 of industrial controller 20. When reached in the evacuation line and, accordingly, the cylinders communicating with it, the required vacuum pressure, the controller 20 turns off the pump 29 and closes the solenoid valves 9, 10.

Next, the discharge line is connected to the adapter Ί of the central manifold, then the controller 20 again opens the electromagnetic valves 9, 10, after which inert gas under pressure begins to flow into the cylinders being filled. At the same time, controller 20 begins measuring pressure and temperature in manifolds 5, 6 using pressure sensors 11, 12 and temperature 13, 14 by iteratively polling measuring inputs 16, 17, 18, 19. After reaching the specified pressure in manifolds 5, 6 and Accordingly, in the cylinders being refilled, the controller 20 closes the electromagnetic valves 9, 10. At the last stage of refilling, the valves 7 are closed, and the gas remaining in the manifolds 5, 6 is vented using the gas relief valves 15.

If the gas temperature in the collectors 5, 6 exceeds the maximum permissible set value or unacceptable fluid pressure pulsations, the controller 20, in accordance with the control program, automatically closes the solenoid valves 9, 10, displays an alarm on the operator panel and transmits an error signal to the remote SCADA system.

Thus, the device considered in this application is a gas train designed for filling cylinders with technical gases up to a pressure of 200 kgf/cm ² (20 MPa). A special feature of the device is that the proposed ramp can be used as the main module in the construction of cryogenic complexes for filling cylinders of various configurations depending on the technological needs of the customer. This module provides simultaneous refilling of six cylinders, as well as automated control over the technological indicators of the cylinder refilling process with the possibility of its remote control.

Claims (7)

1. A device for filling high-pressure cylinders with industrial gases, containing a central manifold consisting of a vertical adapter with a safety valve, made integral with a horizontal pipe, on the left and right ends of which pipe brackets are installed, consisting of a nipple and a nut screwed onto the pipe, equipped with a gasket ; the left and right high-pressure manifolds are installed in the brackets and secured with nuts, each of which consists of a pipe equipped with three outlet lines made in the form of branch pipes with valves and compensator coils; characterized in that an electromagnetic valve, a pressure sensor and a temperature sensor are installed at the inlet of each of the manifolds, and a gas discharge valve is installed at the outlet; the outputs of the mentioned sensors are connected to the measuring inputs of the control unit, made on the basis of an industrial controller, equipped with an Ethernet interface, high-speed inputs, transistor and relay outputs, with a human-machine interface connected to it via the RS-232 interface and analog input modules, while the measuring the inputs of the control unit are inputs of analog input modules, the first high-speed input of the controller is configured to connect a digital pressure sensor to it, the first and second relay outputs of the industrial controller are connected to the solenoid valves of the left and right manifolds, and its transistor output is configured to connect to a vacuum pump vacuum lines. 2. The device according to claim 1, characterized in that a piezoelectric sensor with an output charge signal, designed for pressure from 0 to 40 MPa, is used as a pressure sensor. 3. The device according to claim 1, characterized in that a submersible temperature sensor with a measured temperature range from -65 to +200°C is used as a temperature sensor. 4. The device according to claim 1, characterized in that a device is used as a digital pressure sensor that provides precision pressure measurement in the range from 0 to -101.3 kPa. 5. The device according to claim 1, characterized in that the Modicon M241 series logical controller is used as an industrial controller. 6. The device according to claim 1, characterized in that TM3AI4 modules are used as analog input modules. 7. The device according to claim 1, characterized in that the operator touch panel model HMI GXU3512 is used as the human-machine interface.