Pneumatic valve control assembly and system

Abstract

The utility model discloses a pneumatic valve control assembly and system, the pneumatic valve control assembly is arranged between a gas source end and a user end of nitrogen equipment, the pneumatic valve control assembly comprises a pressure detection device, a nitrogen pipeline connected with the user end and used for obtaining a nitrogen pressure value of the user end; the gas supply control valve is arranged on the output pipeline of the gas source end and is used for opening or closing a gas supply channel from the gas source end to the nitrogen pipeline of the user end; and the controller is electrically connected with the pressure detection device and the control valve and is used for controlling the opening and closing of the air supply control valve according to the nitrogen pressure value.

Description

Technical Field

[0001] This utility model belongs to the field of pneumatic valve control technology, and more specifically, it relates to a pneumatic valve control component and system. Background Technology

[0002] The old equipment used in the gasification station has problems such as nitrogen leakage caused by aging of the nitrogen pipeline controlling the pneumatic valves and leakage from outdoor pipelines. After a period of use, the nitrogen pressure will be low. In order to ensure stable nitrogen pressure, it is necessary to replenish the nitrogen pipeline.

[0003] However, the nitrogen pressure in older equipment is usually controlled by manually opening and closing valves, which poses certain safety hazards. Unstable nitrogen pressure at the gas source can easily lead to gas outages at the user end. Utility Model Content

[0004] The problem of liquefied petroleum gas (LPG) interruption at the user end is common in older equipment where nitrogen pressure is manually controlled by valves. This invention aims to provide a pneumatic valve control component. This component is installed between the nitrogen source and the user end of the nitrogen equipment. The component includes: a pressure detection device connected to the nitrogen pipeline at the user end for acquiring the nitrogen pressure value; a gas replenishment control valve installed on the output pipeline at the gas source end for opening or closing the gas replenishment channel from the gas source to the user end; and a controller electrically connected to the pressure detection device and the control valve for controlling the opening and closing of the gas replenishment control valve based on the nitrogen pressure value.

[0005] Furthermore, the controller is used to receive the pressure signal output by the pressure detection device, and output a control signal to the control valve according to the pressure signal, so as to control the control valve to open or close.

[0006] Furthermore, the controller is used to determine whether it is necessary to replenish the nitrogen pipeline based on the relationship between the nitrogen pressure value and the pressure threshold.

[0007] Furthermore, the controller is used to output a first control signal to the control valve when the nitrogen pressure value is less than the pressure threshold, thereby controlling the control valve to open and replenish nitrogen to the nitrogen pipeline.

[0008] Furthermore, the controller is configured to output a second control signal to the control valve to control the control valve to close when the nitrogen pressure value is greater than or equal to the pressure threshold.

[0009] Furthermore, the pressure threshold ranges from 0.5 to 0.7 MPa.

[0010] Furthermore, the pneumatic valve control assembly also includes a display unit electrically connected to the controller for displaying the nitrogen pressure value.

[0011] Furthermore, the pneumatic valve control component also includes an audible and visual alarm, electrically connected to the controller, used to issue an audible and visual alarm when the nitrogen pressure value is lower than the alarm value, so as to remind the on-duty personnel to replace the nitrogen cylinder or check the equipment operation status.

[0012] Furthermore, this application provides a pneumatic valve control system, which includes an air source, a user end, and any of the pneumatic valve control components described above.

[0013] The technical effects and advantages of this utility model are as follows:

[0014] 1. By installing a pneumatic valve control component between the nitrogen source end and the user end of the nitrogen equipment, the pneumatic valve control component can automatically detect the nitrogen pressure value at the user end and intelligently control the opening and closing of the gas replenishment control valve according to the nitrogen pressure value, so as to achieve automatic constant pressure and ensure stable and reliable nitrogen pressure without manual operation.

[0015] 2. For traditional old equipment, simply connect the pressure detection device of the pneumatic valve control component to the nitrogen pipeline at the user end, and connect the gas replenishment control valve of the pneumatic valve control component to the output pipeline at the gas source end. This will transform the traditional old equipment into intelligent automatic constant pressure equipment, enabling automatic gas replenishment and avoiding the problem of liquefied gas interruption at the user end due to unstable nitrogen pressure at the gas source end. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of a pneumatic valve control system provided in this application.

[0017] In the picture:

[0018] 10. Pressure detection device; 20. Control valve; 30. Controller; 200. Gas source end; 300. User end. Detailed Implementation

[0019] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments. The embodiments of the present invention are given for illustrative and descriptive purposes only, and are not intended to be exhaustive or to limit the present invention to the disclosed forms. Many modifications and variations will be apparent to those skilled in the art. The embodiments were chosen and described to better illustrate the principles and practical applications of the present invention, and to enable those skilled in the art to understand the present invention and design various embodiments with various modifications suitable for a particular purpose.

[0020] See Figure 1 This is a schematic diagram of a pneumatic valve control system provided by this utility model. The pneumatic valve control component is located between the gas source end 200 and the user end 300 of the nitrogen equipment. The pneumatic valve control component includes: a pressure detection device 10, connected to the nitrogen pipeline of the user end 300, used to obtain the nitrogen pressure value of the user end 300; a gas replenishment control valve 20, located on the output pipeline of the gas source end 200, used to open or close the gas replenishment channel from the gas source end 200 to the nitrogen pipeline of the user end 300; and a controller 30, electrically connected to the pressure detection device 10 and the control valve 20, used to control the opening and closing of the gas replenishment control valve 20 according to the nitrogen pressure value.

[0021] It is understandable that by installing a pneumatic valve control component between the nitrogen source end 200 and the user end 300 of the nitrogen equipment, the pneumatic valve control component can automatically detect the nitrogen pressure value at the user end 300 and intelligently control the opening and closing of the replenishment control valve 20 based on the nitrogen pressure value, achieving automatic constant pressure without manual operation, thus ensuring stable and reliable nitrogen pressure. For traditional old equipment, directly connecting the pressure detection device 10 of the pneumatic valve control component to the nitrogen pipeline at the user end 300 and connecting the replenishment control valve 20 of the pneumatic valve control component to the output pipeline at the source end 200 can transform traditional old equipment into intelligent automatic constant pressure equipment, realizing automatic gas replenishment for traditional old equipment. This avoids the problem of liquefied gas interruption at the user end 300 due to unstable nitrogen pressure at the source end 200 in traditional old equipment.

[0022] Furthermore, the controller 30 is used to receive the pressure signal output by the pressure detection device 10, and output a control signal to the control valve 20 according to the pressure signal, so as to control the control valve 20 to open or close. For example, the control valve 20 is a solenoid valve.

[0023] Furthermore, the controller 30 is used to determine whether it is necessary to replenish the nitrogen pipeline based on the relationship between the nitrogen pressure value and the pressure threshold.

[0024] In one specific embodiment, the pressure detection device 10 acquires the nitrogen pressure value of the user terminal 300 in real time, and outputs a pressure signal to the controller 30 according to the nitrogen pressure value; the controller 30 receives the pressure signal from the pressure detection device 10, and generates a control signal for opening or closing the solenoid valve according to the relationship between the nitrogen pressure value and the pressure threshold, and sends the control signal to the solenoid valve; the solenoid valve receives the control signal from the controller 30, and opens or closes the solenoid valve according to the control signal.

[0025] Furthermore, the controller 30 is used to output a first control signal to the control valve 20 when the nitrogen pressure value is less than the pressure threshold, thereby controlling the control valve 20 to open and replenish nitrogen to the nitrogen pipeline.

[0026] Furthermore, the controller 30 is configured to output a second control signal to the control valve 20 to control the control valve 20 to close when the nitrogen pressure value is greater than or equal to the pressure threshold.

[0027] Understandably, if the nitrogen pressure value is less than the pressure threshold, it means that the nitrogen pressure in the nitrogen pipeline is low. Therefore, the controller 30 outputs the first control signal to the solenoid valve to open the solenoid valve and open the gas supply channel from the gas source end 200 to the user end 300 to supply gas to the nitrogen pipeline. If the nitrogen pressure value reaches the pressure threshold, it means that there is no need to supply gas to the nitrogen pipeline. Therefore, the controller 30 outputs the second control signal to the solenoid valve to close the solenoid valve.

[0028] Furthermore, the pressure threshold ranges from 0.5 to 0.7 MPa.

[0029] Furthermore, the pneumatic valve control assembly also includes a display unit electrically connected to the controller 30 for displaying the nitrogen pressure value. For example, this display unit is an electronic display screen.

[0030] Furthermore, the pneumatic valve control component also includes an audible and visual alarm, electrically connected to the controller 30, used to issue an audible and visual alarm when the nitrogen pressure value is less than the alarm value, so as to remind the on-duty personnel to replace the nitrogen cylinder or check the equipment operation status.

[0031] Furthermore, this application provides a pneumatic valve control system, which includes an air source 200, a user end 300, and any of the pneumatic valve control components described above, and can achieve the same effect. To avoid repetition, it will not be described again here.

[0032] In the description of this utility model, it should be understood that the indicated orientation or positional relationship is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing this utility model and simplifying the description, and is not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0033] Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. All other embodiments obtained by those skilled in the art and related fields based on the embodiments of this utility model without creative effort should fall within the protection scope of this utility model. Structures, devices, and operating methods not specifically described and explained in this utility model, unless otherwise specified or limited, shall be implemented according to conventional means in the art.

Claims

1. A pneumatic valve control assembly, characterized in that, The pneumatic valve control assembly is located between the gas source end (200) and the user end (300) of the nitrogen equipment, and the pneumatic valve control assembly includes: The pressure detection device (10) is connected to the nitrogen pipeline of the user terminal (300) and is used to obtain the nitrogen pressure value of the user terminal (300). The control valve (20) is installed on the output pipeline of the gas source end (200) and is used to open or close the gas supply channel of the nitrogen pipeline from the gas source end (200) to the user end (300). The controller (30) is electrically connected to the pressure detection device (10) and the control valve (20) and is used to control the opening and closing of the control valve (20) according to the nitrogen pressure value.

2. The pneumatic valve control assembly according to claim 1, characterized in that, The controller (30) is used to receive the pressure signal output by the pressure detection device (10) and output a control signal to the control valve (20) according to the pressure signal to control the control valve (20) to open or close.

3. The pneumatic valve control assembly according to claim 1, characterized in that, The controller (30) is used to determine whether it is necessary to replenish the nitrogen pipeline based on the relationship between the nitrogen pressure value and the pressure threshold.

4. The pneumatic valve control assembly according to claim 3, characterized in that, The controller (30) is used to output a first control signal to the control valve (20) when the nitrogen pressure value is less than the pressure threshold, so as to control the control valve (20) to open and replenish the nitrogen pipeline.

5. The pneumatic valve control assembly according to claim 3, characterized in that, The controller (30) is used to output a second control signal to the control valve (20) when the nitrogen pressure value is greater than or equal to the pressure threshold, thereby controlling the control valve (20) to close.

6. The pneumatic valve control assembly according to claim 3, characterized in that, The pressure threshold ranges from 0.5 to 0.7 MPa.

7. The pneumatic valve control assembly according to claim 1, characterized in that, The pneumatic valve control assembly also includes: The display unit is electrically connected to the controller (30) and is used to display the nitrogen pressure value.

8. The pneumatic valve control assembly according to claim 1, characterized in that, The pneumatic valve control assembly also includes: An audible and visual alarm is electrically connected to the controller (30) and is used to issue an audible and visual alarm when the nitrogen pressure value is less than the alarm value, so as to remind the on-duty personnel to replace the nitrogen cylinder or check the equipment operation.

9. A pneumatic valve control system, characterized in that, The pneumatic valve control system includes an air source (200), a user (300), and a pneumatic valve control component as described in any one of claims 1-8.

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