An automatic pressure control system

Abstract

The utility model provides a kind of automatic pressure control system, it is related to pressure control technical field, including pressure valve body, the back pressure valve body inside part is two parts of control side and main body side, the inner wall of back pressure valve body is located between control side and main body side and is equipped with membrane control assembly, back pressure valve body side wall is located at the side communication connection pipe of control side.The utility model is equipped with membrane control assembly, control side and main body side are distributed up and down, upper half is control side, lower half is the main body side of pressure system, middle is membrane control assembly, the pressure of two sides is controlled by membrane control assembly, instead of compression bearing spring, avoid spring fatigue or damage, affect the pressure stability of system.

Description

Technical Field

[0001] This utility model belongs to the field of pressure control technology, and in particular relates to an automatic pressure control system. Background Technology

[0002] Fixed-bed reactors are widely used in various catalytic fields, but the pressure control of existing fixed-bed devices at home and abroad all adopt the form of manual back pressure valves. Traditional manual piston and diaphragm back pressure valves use springs to set the pressure, and the operator manually adjusts the handle to control the pressure of the front-end system.

[0003] Traditional piston and diaphragm back pressure valves use a pressure bearing spring to set the opening pressure. This mechanical structure places high demands on the bearing spring. Under operating conditions, the bearing spring is always in a compressed state. If the spring becomes fatigued or damaged, it is difficult to ensure the pressure stability of the upstream system. There are also shortcomings in pressure regulation accuracy. The opening position for the same pressure often changes, and the operation process is relatively cumbersome. Utility Model Content

[0004] To address the aforementioned problems, this invention proposes an automatic pressure control system to more accurately resolve the problems described above.

[0005] This utility model is achieved through the following technical solution:

[0006] This utility model proposes an automatic pressure control system, including a back pressure valve body. The back pressure valve body is divided into a control side and a main body side. A membrane control component is provided on the inner wall of the back pressure valve body between the control side and the main body side. A connecting pipe is connected to the side wall of the back pressure valve body on the control side. An air inlet pipe and an air outlet pipe are connected to the side wall of the back pressure valve body on the main body side.

[0007] In one example, a transverse partition is fixedly connected to the inner wall of the back pressure valve body on the side of the main body. A vertical partition is fixedly connected between the transverse partition and the inner wall of the back pressure valve body. The vertical partition divides the space between the transverse partition and the back pressure valve body into an air inlet chamber and an air outlet chamber. The air inlet pipe is connected to the air inlet chamber, and the air outlet pipe is connected to the air outlet chamber. The transverse partition is provided with through holes at the positions facing the air inlet chamber and the air outlet chamber.

[0008] In one example, the membrane control assembly includes a flexible membrane located above a transverse partition and fixedly connected to a back pressure valve body. The flexible membrane has a protrusion facing the outlet chamber, and the protrusion faces a through hole on the transverse partition above the outlet chamber.

[0009] In one example, a gas buffer tank is installed at the upper end of the connecting pipe, one side of the gas buffer tank is connected to a gas generator, a first solenoid valve is installed between the gas buffer tank and the gas generator, and a second solenoid valve is installed on the other side of the gas buffer tank.

[0010] In one example, a pressure transmitter is installed on the gas buffer tank, and two solenoid instruments are installed on the pressure transmitter. The two solenoid instruments are installed on the same control terminal and are respectively connected to a first solenoid valve and a second solenoid valve.

[0011] In one example, the control terminal is equipped with a human-machine interface.

[0012] The automatic pressure control system proposed in this utility model can bring the following beneficial effects:

[0013] Firstly, by setting up a membrane control component, the control side and the main body are distributed vertically. The upper part is the control side, which is mainly the place where the external air source realizes the pressure opening. The lower part is the main body of the pressure system, where the gas of the controlled pressure system flows. The middle part is the membrane control component, which controls the pressure on both sides, replacing the pressure bearing spring, and avoiding fatigue or damage to the spring, which would affect the pressure stability of the system.

[0014] Secondly, by setting up a control terminal, Yudian Instruments, and a pressure transmitter, the intelligent control terminal centrally collects and displays the values ​​from Yudian Instruments. The operator only needs to input the predetermined value in the corresponding window of the human-machine interface. The high-precision pressure transmitter monitors the pressure on the control side 2 in real time and collects the signal to Yudian Instruments. When Yudian Instruments reads the signal, it promptly sends feedback to the first and second solenoid valves to control the opening and closing of the first and second solenoid valves, control the gas flow, and ultimately achieve automatic steady-state regulation of the control side pressure. This allows the use of an external gas generator to maintain a constant control side pressure, thereby achieving precise control of the main body pressure and making operation more convenient. Attached Figure Description

[0015] The accompanying drawings, which are provided to further illustrate the present invention and constitute a part of the present invention, illustrate exemplary embodiments of the present invention and are used to explain the present invention, but do not constitute an undue limitation of the present invention.

[0016] In the attached diagram:

[0017] Figure 1 This is a schematic diagram of the internal structure of the back pressure valve of this utility model.

[0018] Figure 2 This is a flowchart illustrating the usage of this utility model.

[0019] In the diagram: 1. Back pressure valve body; 2. Control side; 3. Main body side; 4. Membrane control assembly; 41. Flexible membrane; 42. Protrusion; 5. Connecting pipe; 6. Inlet pipe; 7. Outlet pipe; 8. Horizontal partition; 9. Vertical partition; 10. Inlet chamber; 11. Outlet chamber; 12. Through hole; 13. Gas buffer tank; 14. Gas generator; 15. Second solenoid valve; 16. Pressure transmitter; 17. Yudian Instruments; 18. Control terminal; 19. First solenoid valve. Detailed Implementation

[0020] To more clearly illustrate the overall concept of this utility model, a detailed description will be provided below with reference to the accompanying drawings.

[0021] like Figures 1-2 As shown in the figure, an embodiment of this utility model proposes an automatic pressure control system, including a back pressure valve body 1. The back pressure valve body 1 is divided into two parts: a control side 2 and a main body side 3. A membrane control component 4 is provided on the inner wall of the back pressure valve body 1 between the control side 2 and the main body side 3. A connecting pipe 5 is connected to the side wall of the back pressure valve body 1 on the control side 2, and an air inlet pipe 6 and an air outlet pipe 7 are connected to the side wall of the back pressure valve body 1 on the main body side 3. The control side 2 and the main body side 3 are distributed vertically. The upper part is the control side 2, which is mainly the place where the external air source realizes the pressure opening. The lower part is the main body side 3 of the pressure system, through which the gas of the controlled pressure system flows. The membrane control component 4 is in the middle. The membrane control component 4 controls the pressure on both sides, replacing the pressure bearing spring, avoiding spring fatigue or damage, and affecting the pressure stability of the system.

[0022] like Figure 1 As shown, a transverse partition 8 is fixedly connected to the inner wall of the back pressure valve body 1 on one side of the main body 3. A vertical partition 9 is fixedly connected between the transverse partition 8 and the inner wall of the back pressure valve body 1. The vertical partition 9 divides the space between the transverse partition 8 and the back pressure valve body 1 into an air inlet chamber 10 and an air outlet chamber 11. The air inlet pipe 6 is connected to the air inlet chamber 10, and the air outlet pipe 7 is connected to the air outlet chamber 11. The transverse partition 8 is provided with through holes 12 at the positions facing the air inlet chamber 10 and the air outlet chamber 11. The membrane control component 4 is located above the transverse partition 8. When the pressure on the control side 2 is higher than that on the main body 3, the membrane control component 4 descends to block the through holes 12, and the system is in a pressurized state. When the pressure on the control side 2 is lower than that on the main body 3, the diaphragm rises to open the orifice, and the system is in a depressurized state. When the pressures on both sides are balanced, the gas on the main body 3 continues to flow, and the system pressure is in a stable state. By controlling the pressure on the control side 2, the pressure on the main body 3 in the system is controlled.

[0023] like Figure 1As shown, the membrane control assembly 4 includes a flexible membrane 41, which is located above the transverse partition 8. The flexible membrane 41 is fixedly connected to the back pressure valve body 1. A protrusion 42 is provided on the flexible membrane 41 facing the outlet chamber 11. The protrusion 42 faces the through hole 12 on the transverse partition 8 and above the outlet chamber 11. The protrusion 42 on the flexible membrane 41 is used to block the through hole 12 on the transverse partition 8 and above the outlet chamber 11. When the system is in a pressurized state, the protrusion 42 enters the through hole 12 on the transverse partition 8 above the outlet chamber 11, blocking the outlet chamber 11 and preventing the gas in the inlet chamber 10 from entering the outlet chamber 11 and being discharged. Compared with the flat surface of the flexible membrane 41, the protrusion 42 has a better sealing effect on the through hole 12.

[0024] like Figure 2 As shown, a gas buffer tank 13 is installed at the upper end of the connecting pipe 5. One side of the gas buffer tank 13 is connected to the gas generator 14. A first solenoid valve 19 is installed between the gas buffer tank 13 and the gas generator 14. A second solenoid valve 15 is installed on the other side of the gas buffer tank 13. The external gas source is provided by the gas generator 14. The first solenoid valve 19 controls the gas flow into the gas generator 14 to increase the pressure on the control side 2. The second solenoid valve 15 is responsible for controlling the gas discharge to reduce the pressure on the control side 2. By setting up the gas buffer tank 13, large fluctuations in the pressure on the control side 2 due to large changes in the gas flow are avoided.

[0025] like Figure 2 As shown, a pressure transmitter 16 is installed on the gas buffer tank 13, and two Yudian instruments 17 are installed on the pressure transmitter 16. The two Yudian instruments 17 are installed on the same control terminal 18, and the two Yudian instruments 17 are respectively connected to the first solenoid valve 19 and the second solenoid valve 15. The control terminal 18 is equipped with a human-machine interface. The high-precision pressure transmitter 16 monitors the pressure on the control side 2 in real time and collects the signal to the Yudian instruments 17. When the Yudian instruments 17 read the signal, they promptly provide feedback to the first solenoid valve 19 and the second solenoid valve 15 to control the opening and closing of the first solenoid valve 19 and the second solenoid valve 15, thereby controlling the gas flow and ultimately achieving automatic steady-state regulation of the pressure on the control side 2. During this process, the intelligent control terminal 18 centrally collects and displays the values ​​of the Yudian instruments 17. The operator only needs to input the predetermined value in the corresponding window of the human-machine interface to achieve the constant pressure on the control side 2 using the external gas generator 14, thereby achieving precise control of the main pressure. The combination of the intelligent control terminal 18 and the PID controller realizes the real-time collection of system pressure signals and the feedback of command signals, making the operation more convenient.

[0026] Working principle: The high-precision pressure transmitter 16 monitors the pressure on the control side 2 in real time and collects the signal to the Yudian instrument 17. When the Yudian instrument 17 reads the signal, it promptly sends feedback to the first solenoid valve 19 and the second solenoid valve 15 to control the opening and closing of the first solenoid valve 19 and the second solenoid valve 15, thereby controlling the gas flow and controlling the pressure on the control side 2. When the pressure on the control side 2 is higher than that on the main body side 3, the protrusion 42 descends to block the through hole 12, and the system is in a pressurized state. When the pressure on the control side 2 is lower than that on the main body side 3, the flexible diaphragm 41 rises to open the orifice, and the system is in a depressurized state. When the pressure on both sides is balanced, the gas on the main body side 3 continues to flow.

[0027] The various embodiments in this specification are described in a progressive manner. Similar or identical parts between embodiments can be referred to interchangeably. Each embodiment focuses on describing the differences from other embodiments. In particular, the system embodiments are basically similar to the method embodiments, so the description is relatively simple; relevant parts can be referred to the descriptions in the method embodiments.

[0028] The above description is merely an embodiment of this utility model and is not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principle of this utility model should be included within the scope of the claims of this utility model.

Claims

1. An automatic pressure control system, characterized in that, Includes a back pressure valve body (1), the back pressure valve body (1) is divided into two parts: a control side (2) and a main body side (3). The inner wall of the back pressure valve body (1) is provided with a membrane control assembly (4) between the control side (2) and the main body side (3). The side wall of the back pressure valve body (1) located on the control side (2) is connected to a connecting pipe (5). The side wall of the back pressure valve body (1) located on the main body side (3) is connected to an air inlet pipe (6) and an air outlet pipe (7).

2. The automatic pressure control system according to claim 1, characterized in that, The inner wall of the back pressure valve body (1) is fixedly connected to a horizontal partition (8) on the side of the main body (3). A vertical partition (9) is fixedly connected between the horizontal partition (8) and the inner wall of the back pressure valve body (1). The vertical partition (9) divides the space between the horizontal partition (8) and the back pressure valve body (1) into an air inlet chamber (10) and an air outlet chamber (11). The air inlet pipe (6) is connected to the air inlet chamber (10), and the air outlet pipe (7) is connected to the air outlet chamber (11). The horizontal partition (8) is provided with through holes (12) at the positions facing the air inlet chamber (10) and the air outlet chamber (11).

3. An automatic pressure control system according to claim 1, characterized in that, The membrane control assembly (4) includes a flexible membrane (41) located above the transverse partition (8). The flexible membrane (41) is fixedly connected to the back pressure valve body (1). A protrusion (42) is provided on the flexible membrane (41) facing the air outlet chamber (11). The protrusion (42) faces the through hole (12) on the transverse partition (8) and above the air outlet chamber (11).

4. An automatic pressure control system according to claim 1, characterized in that, A gas buffer tank (13) is installed at the upper end of the connecting pipe (5). One side of the gas buffer tank (13) is connected to a gas generator (14). A first solenoid valve (19) is installed between the gas buffer tank (13) and the gas generator (14). A second solenoid valve (15) is installed on the other side of the gas buffer tank (13).

5. An automatic pressure control system according to claim 4, characterized in that, A pressure transmitter (16) is installed on the gas buffer tank (13). Two Yudian instruments (17) are installed on the pressure transmitter (16). The two Yudian instruments (17) are installed on the same control terminal (18). The two Yudian instruments (17) are respectively connected to the first solenoid valve (19) and the second solenoid valve (15).

6. An automatic pressure control system according to claim 5, characterized in that, The control terminal (18) is equipped with a human-machine interface.

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