A pneumatic control device for an anti-surge valve

Abstract

The utility model relates to high -power gas compressor technical field, specifically disclose a kind of pneumatic control device for anti-surge valve, comprising: compressor, one end of compressor is fixedly connected with anti-surge valve, the top of anti-surge valve is fixedly connected with cylinder execution mechanism, the inside of anti-surge valve is fixedly connected with manual mechanism, cylinder execution mechanism being set so that device is used, system is under normal working condition, first solenoid valve and second solenoid valve are electrified, when the valve normal control, when the input 4-20mA control signal increases, the A output port output pressure of intelligent positioner increases, after the B port of pneumatic control reversing valve, fast exhaust valve enters the upper cavity of cylinder execution mechanism, under the abnormal action verification or overhaul condition of valve, at this moment, switch manual mechanism upper yoke handle, can quickly realize the meshing of worm shaft and worm wheel, and the push rod of cylinder execution mechanism and worm wheel are integrated structure. To realize the manual operation of valve.

Description

Technical Field

[0001] This utility model relates to the field of high-power gas compressor technology, specifically to a pneumatic control device for an anti-surge valve. Background Technology

[0002] A high-power gas compressor is a device capable of compressing gases with considerable power. It is primarily used to increase gas pressure from lower to higher levels to meet the needs of various industrial processes. For example, in the petrochemical industry, it is used to compress and transport raw materials such as natural gas to long-distance pipelines; in the metallurgical industry, it provides high-pressure air for blast furnace blasting. Large ironmaking blast furnaces require large quantities of high-pressure air to ensure sufficient combustion reactions within the furnace, typically requiring a pressure of around 0.2-0.4 MPa. In these applications, a high-power gas compressor plays a crucial role.

[0003] During operation, the axial compressor experiences a decrease in fan inlet flow due to reduced system load. When the flow rate drops to a certain level, the discharged gas will experience strong oscillations, leading to severe surge in the compressor body. Severe vibration can exacerbate friction between static and moving parts, causing damage. Simultaneously, airflow pulsation can cause resonance, resulting in blade breakage within the unit. Backflow of gas causes a rapid rise in temperature within the unit, damaging the blades and the compressor body. Therefore, this application proposes a pneumatic control device for an anti-surge valve. Utility Model Content

[0004] The purpose of this invention is to provide a pneumatic control device for an anti-surge valve, addressing the problem described in the background art where, during operation of an axial compressor, a decrease in system load leads to a reduction in the fan inlet flow rate. When the flow rate drops to a certain level, the gas discharge generates strong oscillations, causing severe surge in the compressor body. Severe vibration can exacerbate friction between static and moving parts, leading to damage. Simultaneously, airflow pulsation can cause resonance, resulting in blade breakage within the unit. Furthermore, backflow of gas causes a rapid rise in temperature within the unit, damaging the blades and the compressor body.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a pneumatic control device for an anti-surge valve, comprising: a compressor, a cylinder actuator fixedly connected to the top of the compressor, and a manual mechanism fixedly connected inside the compressor.

[0006] The cylinder actuator includes a first solenoid valve fixedly connected to the top of the compressor. A plug is fixedly connected to one side of the first solenoid valve, and a quick-release valve is fixedly connected to one side of the plug. A valve switch is fixedly connected to the top of the quick-release valve. A pneumatically controlled directional valve is fixedly connected to one side of the quick-release valve. An intelligent positioner is fixedly connected to the top of the pneumatically controlled directional valve. A second solenoid valve is fixedly connected to one side of the pneumatically controlled directional valve. A conduit is fixedly connected to the bottom of the pneumatically controlled directional valve. An air storage tank is fixedly connected to the bottom of the pneumatically controlled directional valve.

[0007] A pneumatic enhancer is fixedly connected to the other side of the gas storage tank, and a filter pressure reducing assembly is fixedly connected to one side of the gas storage tank.

[0008] The manual mechanism includes a worm shaft that rotates inside the compressor, a worm wheel that meshes with the top of the worm shaft, and a handle that is fixedly connected to the top of the worm shaft.

[0009] The handle features an anti-slip texture on its outer edge.

[0010] The compressor has a main shaft fixedly connected to one side and a fan inlet fixedly connected to the other side.

[0011] The compressor has a support plate fixedly connected to its bottom, and a support column is fixedly connected to the bottom of the support plate.

[0012] This utility model has at least the following beneficial effects: When this utility model is in use, the cylinder actuator ensures that when the system is in normal working condition, the first and second solenoid valves are energized. When the valve is under normal control, when the input 4-20 mA control signal increases, the output pressure of the A output port of the intelligent positioner increases. The pressure then enters the upper chamber of the cylinder actuator through the B port of the pneumatic reversing valve and the quick exhaust valve, and the actuator pushes the valve downward. When the valve control signal decreases, the output pressure at port D of the intelligent positioner increases. This increases the output pressure at port E of the pneumatic directional valve, acting on the control port of the pneumatic booster. The booster's output pressure then increases, acting on the lower chamber of the cylinder actuator. The actuator drives the valve upward. Due to the booster's amplification effect, the valve opens faster. In cases of valve malfunction requiring verification or maintenance, it is necessary to switch to manual operation of the cylinder actuator. This allows for short-term manual operation to fully open or close the valve. Switching to the manual mechanism's fork handle quickly engages the worm shaft and worm wheel. The worm wheel and the cylinder actuator's push rod are integrated, thus enabling manual valve operation. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0014] Figure 2This is a schematic diagram of the cylinder actuator of this utility model;

[0015] Figure 3 This is a schematic diagram of the manual mechanism of this utility model.

[0016] In the diagram: 1. Compressor; 101. Main shaft; 102. Fan inlet; 103. Support plate; 104. Support column; 2. Cylinder actuator; 202. First solenoid valve; 203. Plug; 204. Group valve switch; 205. Quick exhaust valve; 206. Intelligent positioner; 207. Pneumatic directional valve; 208. Second solenoid valve; 209. Conduit; 210. Pneumatic enhancer; 211. Air tank; 212. Filter pressure reducing assembly; 3. Manual mechanism; 301. Worm shaft; 302. Worm gear; 303. Handle. Detailed Implementation

[0017] 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.

[0018] Example 1

[0019] Please see Figures 1 to 3This utility model provides a technical solution: a pneumatic control device for an anti-surge valve, comprising: a compressor 1, a cylinder actuator 2 fixedly connected to the top of the compressor 1, and a manual mechanism 3 fixedly connected inside the compressor 1. The cylinder actuator 2 enables the device to operate normally. Under normal operating conditions, the first solenoid valve 202 and the second solenoid valve 208 are energized. When the input 4-20 mA control signal increases, the output pressure at the A output port of the intelligent positioner 206 increases, and the pressure enters the upper chamber of the cylinder actuator 2 through the B port of the pneumatic reversing valve 207 and the quick-release valve 205, causing the actuator to push the valve downwards. When the valve control signal decreases, the output pressure at port D of the intelligent positioner 206 increases. This increases the output pressure at port E of the pneumatic directional valve 207, acting on the control port of the pneumatic booster 210. The output pressure of the pneumatic booster 210 increases, acting on the lower chamber of the cylinder actuator 2. The actuator drives the valve upward. Due to the pressure amplification effect of the pneumatic booster 210, the valve opens faster. In cases of valve malfunction requiring verification or maintenance, it is necessary to switch to manual operation of the cylinder actuator 2. This allows for short-term manual operation of the valve to fully open or close. In this case, switching to the manual mechanism 3 with the fork handle 303 quickly engages the worm shaft 301 with the worm wheel 302. The worm wheel 302 and the push rod of the cylinder actuator 2 are an integrated structure, thus enabling manual operation of the valve.

[0020] The cylinder actuator 2 includes a first solenoid valve 202 fixedly connected to the top of the compressor 1. A plug 203 is fixedly connected to one side of the first solenoid valve 202. A quick-release valve 205 is fixedly connected to one side of the plug 203. A valve switch 204 is fixedly connected to the top of the quick-release valve 205. A pneumatically controlled directional valve 207 is fixedly connected to one side of the quick-release valve 205. A smart positioner 206 is fixedly connected to the top of the pneumatically controlled directional valve 207. A second solenoid valve 201 is fixedly connected to one side of the pneumatically controlled directional valve 207. 8. A conduit 209 is fixedly connected to the bottom of the pneumatic reversing valve 207. An air tank 211 is fixedly connected to the bottom of the pneumatic reversing valve 207. A pneumatic enhancer 210 is fixedly connected to the other side of the air tank 211. A filter pressure reducing assembly 212 is fixedly connected to one side of the air tank 211. When the device is in use, the first solenoid valve 202 and the second solenoid valve 208 are energized under normal operating conditions. When the valve is under normal control, when the input 4-20 mA control signal increases, the output pressure of the A output port of the intelligent positioner 206 increases. The pressure then enters the upper chamber of the cylinder actuator 2 through the B port of the pneumatic reversing valve 207 and the quick exhaust valve 205. The cylinder actuator 2 pushes the valve downward. When the control signal of the valve decreases, the output pressure of the D output port of the intelligent positioner 206 increases, and the output pressure of the E port of the pneumatic directional valve 207 increases, which acts on the control port of the pneumatic enhancer 210. The output pressure of the pneumatic enhancer 210 increases and acts on the lower chamber of the cylinder actuator 2. The cylinder actuator 2 drives the valve to move upward. Due to the pressure amplification effect of the pneumatic enhancer 210, the valve opens faster.

[0021] The manual mechanism 3 includes a worm shaft 301 rotatably connected inside the compressor 1. A worm wheel 302 is meshed with the top of the worm shaft 301, and a handle 303 is fixedly connected to the top of the worm shaft 301. The handle 303 has anti-slip textures on its outer periphery. In case of valve malfunction requiring verification or maintenance, it is necessary to switch to manual operation of the cylinder actuator 2, which allows for short-term manual operation of the valve to fully open or close. At this time, switching the fork handle 303 on the manual mechanism 3 quickly engages the worm shaft 301 with the worm wheel 302. The worm wheel 302 and the push rod of the cylinder actuator 2 are an integrated structure, thus enabling manual operation of the valve.

[0022] Example 2

[0023] In this second embodiment, the other structures remain unchanged. The difference from the first embodiment is that a main shaft 101 is fixedly connected to one side of the compressor 1, and a fan inlet 102 is fixedly connected to the other side of the compressor 1. When the device is in use, the airflow can be adjusted through the main shaft 101 and the fan inlet 102, which improves the ease of use of the device. A support plate 103 is fixedly connected to the bottom of the compressor 1, and a support column 104 is fixedly connected to the bottom of the support plate 103.

[0024] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0025] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A pneumatic control device for an anti-surge valve, comprising: The compressor (1) is characterized in that: an anti-surge valve (105) is fixedly connected to one end of the compressor (1), a cylinder actuator (2) is fixedly connected to the top of the anti-surge valve (105), and a manual mechanism (3) is fixedly connected inside the anti-surge valve (105).

2. The pneumatic control device for an anti-surge valve according to claim 1, characterized in that: The cylinder actuator (2) includes a first solenoid valve (202) fixedly connected to the top of the anti-surge valve (105). A double-acting locking valve (203) is fixedly connected to one side of the first solenoid valve (202). A quick-release valve (205) is fixedly connected to one side of the double-acting locking valve (203). A group valve switch (204) is fixedly connected to the top of the quick-release valve (205). A pneumatically controlled directional valve (207) is fixedly connected to one side of the quick-release valve (205). A smart positioner (206) is fixedly connected to the top of the pneumatically controlled directional valve (207). A second solenoid valve (208) is fixedly connected to one side of the pneumatically controlled directional valve (207). A conduit (209) is fixedly connected to the bottom of the pneumatically controlled directional valve (207). An air tank (211) is fixedly connected to the bottom of the pneumatically controlled directional valve (207).

3. The pneumatic control device for the anti-surge valve according to claim 2, characterized in that: A pneumatic enhancer (210) is fixedly connected to the other side of the gas storage tank (211), and a filter pressure reducing assembly (212) is fixedly connected to one side of the gas storage tank (211).

4. The pneumatic control device for an anti-surge valve according to claim 1, characterized in that: The manual mechanism (3) includes a worm shaft (301) rotatably connected inside the anti-surge valve (105), a worm wheel (302) meshing with the top of the worm shaft (301), and a handle (303) fixedly connected to the top of the worm shaft (301).

5. The pneumatic control device for an anti-surge valve according to claim 4, characterized in that: The handle (303) has anti-slip texture on its outer periphery.

6. The pneumatic control device for an anti-surge valve according to claim 4, characterized in that: The compressor (1) has a main shaft (101) fixedly connected to one side, and a fan inlet (102) fixedly connected to the other side.

7. The pneumatic control device for an anti-surge valve according to claim 4, characterized in that: The bottom of the compressor (1) is fixedly connected to a support plate (103), and the bottom of the support plate (103) is fixedly connected to a support column (104).

Images