Quick closing device for pneumatic stop valve of coal water slurry gasification furnace

Abstract

The utility model discloses a quick closing device for a pneumatic stop valve of a coal water slurry gasification furnace, and belongs to the technical field of pneumatic stop valves in the production process of the coal water slurry gasification furnace. The quick closing device for the pneumatic stop valve of the coal water slurry gasification furnace comprises a filtering pressure reducing valve, the output end of the filtering pressure reducing valve is communicated with a first pipeline, the outer wall of the first pipeline is communicated with a second pipeline, a third pipeline and a sixth pipeline, one end of the second pipeline is communicated with a first pneumatic control valve, and the other end of the second pipeline is communicated with a second pneumatic control valve. One end of the third pipeline is communicated with a second pneumatic control valve, one end of the sixth pipeline is communicated with an electromagnetic valve, one end of the electromagnetic valve is communicated with a fifth pipeline, one end of the fifth pipeline is communicated with a fourth pipeline, and the two ends of the fourth pipeline are communicated with the first pneumatic control valve and the second pneumatic control valve respectively. One end of the first pneumatic control valve and one end of the second pneumatic control valve communicate with air cylinders correspondingly, and one ends of the air cylinders are slidably connected with piston rods.

Description

Technical Field

[0001] This utility model relates to the field of pneumatic shut-off valve technology in the production process of coal-water slurry gasifiers, specifically a rapid closing device for the pneumatic shut-off valve of a coal-water slurry gasifier. Background Technology

[0002] In the operation of a coal-water slurry gasifier, the gasifier itself is the most crucial core equipment. The lock hopper sequential control program is the most critical control component during gasifier operation, and the pneumatic shut-off valve is a vital component within this program; its safety and reliability directly impact the safe and stable operation of the gasifier. During the lock hopper sequential control program, slag discharge, pressurization, depressurization, and slag collection processes are performed every half hour, resulting in frequent valve actuation, high operating pressure (6.3 MPa), and prolonged operation under high pressure and high temperature conditions. During valve opening, instrument air drives the valve; during closing, the instrument air is interrupted, and the valve closes using its own spring force. Due to the frequent opening and closing of the valve over a long period, the spring preload decreases. This insufficient spring preload prevents rapid closure during the closing process, affecting the normal operation of the lock hopper sequential control program and, in severe cases, forcing the gasifier to shut down, thus impacting safe production. Utility Model Content

[0003] To address the problem that the pneumatic shut-off valve of a coal-water slurry gasifier cannot close quickly during normal operation, this invention provides a quick-closing device for the pneumatic shut-off valve of a coal-water slurry gasifier.

[0004] In view of the above problems, the technical solution proposed by this utility model is as follows:

[0005] A pneumatic shut-off valve quick-closing device for a coal-water slurry gasifier includes a filter pressure reducing valve. The output end of the filter pressure reducing valve is connected to a first pipeline. The outer wall of the first pipeline is connected to a second pipeline, a third pipeline, and a sixth pipeline. One end of the second pipeline is connected to a first pneumatic control valve. One end of the third pipeline is connected to a second pneumatic control valve. One end of the sixth pipeline is connected to a solenoid valve. One end of the solenoid valve is connected to a fifth pipeline. One end of the fifth pipeline is connected to a fourth pipeline. Both ends of the fourth pipeline are connected to the first and second pneumatic control valves, respectively. One end of the first and second pneumatic control valves is connected to a cylinder. One end of the cylinder is slidably connected to a piston rod. An elastic component is provided on one side of the cylinder, and one end of the piston rod extends into the interior of the elastic component.

[0006] Furthermore, the cylinder includes a cylinder body, and a piston plate is slidably connected inside the cylinder body, with one side of the piston plate connected to one end of the piston rod.

[0007] The beneficial effect of adopting the above-mentioned further solution is that, through the connection and use of the piston plate, it can move left and right reciprocally by driving the piston rod in the cylinder.

[0008] Furthermore, the cylinder body has a first air inlet and a second air inlet on both sides of the piston plate, with one end of the first air inlet connected to one end of the first air control valve and one end of the second air inlet connected to one end of the second air control valve.

[0009] The beneficial effect of adopting the above-mentioned further solution is that, by setting the first air inlet and the second air inlet, it can provide positional space for the connection of the first air control valve and the second air control valve.

[0010] Furthermore, the elastic component includes a housing, an interior of which a spring is connected, and one end of the piston rod extends into the interior of the housing and is connected to one end of the spring.

[0011] The advantage of adopting the above-mentioned further solution is that the use of springs facilitates the elastic reset of the piston rod.

[0012] Furthermore, the input end of the filter pressure reducing valve is connected to an external pipe for the instrument air source.

[0013] The advantage of adopting the above-mentioned further solution is that by setting up an external pipe for the instrument air source, it is convenient for the filter pressure reducing valve to connect to the external instrument air.

[0014] Furthermore, the first, second, third, fourth, fifth, and sixth pipelines are all instrument air pipelines.

[0015] Compared with the prior art, the beneficial effects of this utility model are:

[0016] 1. This utility model can effectively solve the problem that the pneumatic shut-off valve of the coal-water slurry gasifier cannot close quickly during normal operation, which affects the safe and stable operation of the gasifier.

[0017] 2. This utility model can solve the problem that the pneumatic shut-off valve of the coal-water slurry gasifier in the coal chemical industry cannot be closed quickly, eliminate and reduce the system load reduction or even shutdown caused by valve failure and inability to close quickly, and ensure the safe and stable operation of the gasifier. Attached Figure Description

[0018] The accompanying drawings are provided to further understand this application and form part of the specification. They are used together with the embodiments of this application to explain this application and do not constitute a limitation thereof.

[0019] Figure 1A three-dimensional schematic diagram of a pneumatic shut-off valve quick-closing device for a coal-water slurry gasifier provided by this utility model;

[0020] Figure 2 This utility model provides a module block diagram of a pneumatic shut-off valve quick-closing device for a coal-water slurry gasifier.

[0021] In the diagram: 1. Filter pressure reducing valve; 2. Solenoid valve; 3. First pneumatic control valve; 4. Second pneumatic control valve; 5. Piston rod; 6. Cylinder; 601. Cylinder body; 602. Piston plate; 603. First air inlet; 604. Second air inlet; 7. Elastic component; 701. Housing; 702. Spring; 101. First pipeline; 102. Second pipeline; 103. Third pipeline; 104. Fourth pipeline; 105. Fifth pipeline; 106. Sixth pipeline. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0023] Please see Figures 1-2 This utility model provides a technical solution: a pneumatic shut-off valve quick-closing device for a coal-water slurry gasifier, including a filter pressure reducing valve 1. The output end of the filter pressure reducing valve 1 is connected to a first pipeline 101. The outer wall of the first pipeline 101 is connected to a second pipeline 102, a third pipeline 103, and a sixth pipeline 106. One end of the second pipeline 102 is connected to a first pneumatic control valve 3. One end of the third pipeline 103 is connected to a second pneumatic control valve 4. One end of the sixth pipeline 106 is connected to a solenoid valve 2. One end of the solenoid valve 2 is connected to a fifth pipeline 105. One end of the fifth pipeline 105 is connected to a fourth pipeline 104. The two ends of the fourth pipeline 104 are respectively connected to the first pneumatic control valve 3 and the second pneumatic control valve 4. One end of the first pneumatic control valve 3 and the second pneumatic control valve 4 are respectively connected to a cylinder 6. One end of the cylinder 6 is slidably connected to a piston rod 5. An elastic component 7 is provided on one side of the cylinder 6. One end of the piston rod 5 extends into the interior of the elastic component 7. The first pneumatic control valve 3 opens to allow air to pass through, and is connected to the second pneumatic control valve 4 via the fourth pipeline 104. This allows the second pneumatic control valve 4 to open to allow air to pass through, and instrument air enters the cylinder 6 to drive the piston rod 5 to move to the left. This causes the compressed spring 702 to quickly reset and close the valve, effectively avoiding the problem of the valve not closing normally and quickly due to insufficient preload of the spring 702.

[0024] As an embodiment of this utility model, the cylinder 6 further includes a cylinder body 601, and a piston plate 602 is slidably connected inside the cylinder body 601. One side of the piston plate 602 is connected to one end of the piston rod 5. Through the connection of the piston plate 602, the piston rod 5 can move back and forth left and right under the drive of the cylinder body 601.

[0025] As an embodiment of this utility model, the cylinder body 601 is further provided with a first air inlet 603 and a second air inlet 604 on both sides of the piston plate 602. One end of the first air inlet 603 is connected to one end of the first air control valve 3, and one end of the second air inlet 604 is connected to one end of the second air control valve 4. The arrangement of the first air inlet 603 and the second air inlet 604 provides positional space for the connection of the first air control valve 3 and the second air control valve 4.

[0026] As an embodiment of this utility model, the elastic component 7 further includes a housing 701, a spring 702 connected inside the housing 701, one end of the piston rod 5 extends into the housing 701 and is connected to one end of the spring 702. Through the connection of the spring 702, it is convenient to drive the piston rod 5 to perform elastic reset activities.

[0027] As an embodiment of this utility model, the input end of the filter pressure reducing valve 1 is connected to an external instrument air source pipe. The external instrument air source pipe facilitates the filter pressure reducing valve 1 to connect to the external instrument air.

[0028] As an embodiment of this utility model, the first pipeline 101, the second pipeline 102, the third pipeline 103, the fourth pipeline 104, the fifth pipeline 105 and the sixth pipeline 106 are all instrument air pipelines.

[0029] Specifically, the working principle of this pneumatic shut-off valve quick-closing device for a coal-water slurry gasifier is as follows: the first pneumatic control valve 3 opens to allow air to pass through, which is connected to the second pneumatic control valve 4 via the fourth pipeline 104. This allows the second pneumatic control valve 4 to open to allow air to pass through, and instrument air enters the cylinder 6, driving the piston rod 5 to move to the left. This causes the compressed spring 702 to quickly reset and close the valve, effectively avoiding the problem of the valve not closing normally and quickly due to insufficient preload of the spring 702. The instrument air source passes through the filter and pressure reducing valve 1, then enters the solenoid valve 2 via the sixth pipeline 106, and simultaneously enters the first pneumatic control valve 3 via the first pipeline 101 and the second pipeline 102. Finally, it enters the second pneumatic control valve 4 via the first pipeline 101 and the third pipeline 103. When the valve is open, solenoid valve 2 receives an open signal and enters the first pneumatic control valve 3 through the fifth pipeline 105 and the fourth pipeline 104, causing the first pneumatic control valve 3 to open and allow air to pass through. Instrument air passes through the first pneumatic control valve 3 and then enters the cylinder 6 through the second air inlet 604. The compressed instrument air drives the piston rod 5 to move to the right, causing the valve to open and compressing the spring 702. When the valve is closed, solenoid valve 2 receives a close signal. At this time, the fifth pipeline 105 is disconnected from solenoid valve 2, while the first pneumatic control valve 3 opens and connects to the second pneumatic control valve 4 through the fourth pipeline 104, causing the second pneumatic control valve 4 to open and allow air to pass through. Instrument air enters the second pneumatic control valve 4 through the first pipeline 101 and the third pipeline 103, and then enters the cylinder 6 through the first air inlet 603. At this time, the instrument air drives the piston rod 5 to move to the left, causing the compressed spring 702 to quickly return to its original position, thus closing the valve. The advantage of this design is that when the valve is about to close, instrument air is added to drive the piston rod 5 to move quickly, which avoids the valve not being able to close quickly due to insufficient preload of the spring 702.

Claims

1. A pneumatic shut-off valve quick-closing device for a coal-water slurry gasifier, characterized in that, The system includes a filter pressure reducing valve (1), the output end of which is connected to a first pipeline (101). The outer wall of the first pipeline (101) is connected to a second pipeline (102), a third pipeline (103), and a sixth pipeline (106). One end of the second pipeline (102) is connected to a first pneumatic control valve (3), one end of the third pipeline (103) is connected to a second pneumatic control valve (4), and one end of the sixth pipeline (106) is connected to a solenoid valve (2). One end of the solenoid valve (2) is connected to... The fifth pipeline (105) is connected to a fourth pipeline (104) at one end. The two ends of the fourth pipeline (104) are respectively connected to the first pneumatic control valve (3) and the second pneumatic control valve (4). The first pneumatic control valve (3) and the second pneumatic control valve (4) are respectively connected to a cylinder (6). A piston rod (5) is slidably connected to one end of the cylinder (6). An elastic component (7) is provided on one side of the cylinder (6). One end of the piston rod (5) extends into the interior of the elastic component (7).

2. The pneumatic shut-off valve quick-closing device for a coal-water slurry gasifier according to claim 1, characterized in that, The cylinder (6) includes a cylinder body (601), and a piston plate (602) is slidably connected inside the cylinder body (601). One side of the piston plate (602) is connected to one end of the piston rod (5).

3. The pneumatic shut-off valve quick-closing device for a coal-water slurry gasifier according to claim 2, characterized in that, The cylinder body (601) has a first air inlet (603) and a second air inlet (604) on both sides of the piston plate (602). One end of the first air inlet (603) is connected to one end of the first air control valve (3), and one end of the second air inlet (604) is connected to one end of the second air control valve (4).

4. The pneumatic shut-off valve quick-closing device for a coal-water slurry gasifier according to claim 1, characterized in that, The elastic component (7) includes a housing (701) with a spring (702) connected inside the housing (701), and one end of the piston rod (5) extends into the interior of the housing (701) and is connected to one end of the spring (702).

5. A quick-closing device for a pneumatic shut-off valve in a coal-water slurry gasifier according to claim 1, characterized in that, The input end of the filter pressure reducing valve (1) is connected to an external pipe for the instrument air source.

6. The pneumatic shut-off valve quick-closing device for a coal-water slurry gasifier according to claim 1, characterized in that, The first pipeline (101), the second pipeline (102), the third pipeline (103), the fourth pipeline (104), the fifth pipeline (105), and the sixth pipeline (106) are all instrument air pipelines.

Images