U-shaped blowdown anti-reflux device of gas-liquid separator

Abstract

The utility model discloses a U-shaped blowdown anti-reflux device of a gas-liquid separator, which belongs to the technical field of gas-liquid separation and comprises a separator main body, the bottom of the separator main body is communicated and connected with a blowdown block, and one end, far away from the blowdown block, of a blowdown pipe is connected with an electric ball valve. A control unit used in cooperation with the flow sensor and the electric telescopic rod is arranged on the side, located on the electric telescopic rod, of the fixing frame. The electric telescopic rod firstly drives the blocking block to block the sewage discharging block, so that the sewage flow is gradually reduced, the water hammer effect caused by sudden reduction of the water flow speed when a valve is directly closed traditionally is avoided, the problems of pipeline vibration, connecting piece looseness, pipeline breakage and the like caused by the water hammer effect are reduced, and safe and stable operation of equipment is guaranteed; the service life of the equipment is prolonged, the flow sensor monitors the flow in real time, the control unit is matched to accurately control the electric telescopic rod and the electric ball valve, meanwhile, the problems of low pollution discharge efficiency, equipment corrosion and the like caused by leakage are prevented, and it is guaranteed that the pollution discharge process is efficient and environmentally friendly.

Description

U-shaped sewage discharge anti-backflow device for gas-liquid separator Technical Field

[0001] This utility model belongs to the field of gas-liquid separation technology, specifically a U-shaped sewage discharge and backflow prevention device for a gas-liquid separator. Background Technology

[0002] In many industrial fields such as wastewater treatment, petrochemicals, and refrigeration systems, gas-liquid separators are key equipment for achieving efficient gas-liquid separation. During the operation of the gas-liquid separator, timely discharge of the separated liquid is crucial. The U-shaped sewage discharge and backflow prevention device is a core component that ensures smooth sewage discharge and prevents liquid backflow into the system. Its performance directly affects the stability, safety, and service life of the gas-liquid separator.

[0003] Currently, the common U-shaped backflow prevention devices for gas-liquid separators on the market mainly fall into the following categories: one type is based on the principle of a simple one-way valve, which prevents liquid backflow through the one-way conduction characteristic of the one-way valve; another type is a device that uses a U-shaped tube liquid seal structure, which uses the liquid seal formed by the liquid inside the U-shaped tube to prevent gas or liquid backflow; and some devices combine with an electronic control system, which uses pressure sensors, flow sensors, etc. to monitor system parameters in real time and control valve actions to achieve the backflow prevention function.

[0004] However, when the drain valve is suddenly closed, the existing device is unable to effectively slow down the drastic change in water flow velocity, which generates a water hammer effect, causing a sharp fluctuation in the pressure inside the pipeline, resulting in problems such as pipeline vibration, loosening of connectors, or even rupture, which seriously affects the service life and operational safety of the equipment. Summary of the Invention

[0005] To overcome the above-mentioned defects, this utility model provides a U-shaped anti-backflow device for gas-liquid separators, which solves the problem that when the drain valve is suddenly closed, the existing device is unable to effectively slow down the rapid change in water flow velocity, thereby generating a water hammer effect, causing a sharp fluctuation in the pressure inside the pipeline, resulting in pipeline vibration, loosening of connecting parts or even cracking, which seriously affects the service life and operational safety of the equipment.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a U-shaped sewage discharge and anti-backflow device for a gas-liquid separator, comprising a separator body, a sewage discharge block connected to the bottom of the separator body, a sewage discharge pipe threaded to the bottom of the sewage discharge block, a fixing block fixedly connected to the outside of the sewage discharge pipe directly below the sewage discharge block, a connecting rod movably connected inside the fixing block, a blocking block fixedly connected to the end of the connecting rod, a sealing ring fixedly connected to the bottom of the blocking block, the sewage discharge block having an inverted trapezoidal structure inside, and the blocking block also having a trapezoidal structure fitting against the inner wall of the sewage discharge block. A mounting bracket is fixedly installed on the outside of the main body of the device. An electric telescopic rod is fixedly installed on the inside of the mounting bracket. The output end of the electric telescopic rod is fixedly connected to the bottom end of the connecting rod. The connecting rod movably passes through the mounting block and the drain pipe. A sealing gasket is provided at the contact point between the drain pipe and the connecting rod. An electric ball valve is connected to the end of the drain pipe away from the drain block. A flow sensor is installed on the outside of the drain pipe above the electric ball valve. A control unit that works with the flow sensor and the electric telescopic rod is provided on one side of the mounting bracket located on the electric telescopic rod.

[0007] As a further embodiment of this utility model: a gas-liquid inlet pipe is provided on one side of the separator body, a baffle is provided on the inner side of the separator body at the opening of the gas-liquid inlet pipe, a demister is snapped on the inner side of the separator body above the baffle, an exhaust pipe is provided on the top of the separator body, and a liquid outlet pipe is provided on the side of the separator body away from the gas-liquid inlet pipe.

[0008] As a further embodiment of this utility model: a fixing ring is fixedly installed on the outer side of the separator body, and multiple sets of support legs are fixedly connected to the outer side of the fixing ring. A base plate is fixedly connected to the bottom of the support legs, and the diameter of the base plate is larger than the diameter of the fixing ring.

[0009] As a further embodiment of this utility model: a one-way valve is threadedly connected inside the sewage pipe below the sewage block.

[0010] As a further embodiment of this utility model: a protective block is bolted inside the fixing frame, and the electric telescopic rod is located inside the protective block.

[0011] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0012] 1. Wastewater separated inside the gas-liquid separator enters the drain pipe through the drain block connected at the bottom, and is then discharged through the electric ball valve. During this process, the block does not obstruct the flow of wastewater in its initial state, and the wastewater can pass smoothly through the drain pipe. When it is necessary to stop the discharge, the flow sensor monitors the wastewater flow in the drain pipe in real time and transmits the data to the control unit. According to the set program, the control unit first controls the electric telescopic rod to start. The output end of the electric telescopic rod pushes the connecting rod to move upward. The connecting rod drives the block to rise. Since the block is trapezoidal and fits against the inner wall of the drain block, as the block rises, it gradually seals the connection between the drain block and the drain pipe, so that the wastewater flow gradually decreases. When the block completely fits against the inner wall of the drain block and almost blocks the flow of wastewater, the control unit then controls the electric ball valve to close, completing the closing operation of the drain channel. If it is necessary to discharge wastewater again, the control unit controls the electric ball valve to open, and then controls the electric telescopic rod to retract, driving the connecting rod and the block to descend, so that the block separates from the inner wall of the drain block, and the wastewater can be discharged again through the drain block and the drain pipe.

[0013] 2. The electric telescopic rod first drives the block to seal the sewage block, gradually reducing the sewage flow rate before closing the electric ball valve. This avoids the water hammer effect caused by the sudden drop in water flow velocity when the valve is closed directly in the traditional way. It reduces problems such as pipe vibration, loosening of connectors, and pipe rupture caused by water hammer, ensuring safe and stable operation of the equipment and extending its service life. The flow sensor monitors the flow rate in real time, and together with the control unit, it can precisely control the electric telescopic rod and the electric ball valve. The sewage discharge speed and closing timing can be flexibly adjusted according to the actual working conditions. Whether it is sewage discharge demand of different flow rates or dealing with complex operating environments, it can achieve precise control, improving the reliability and adaptability of equipment operation. The sealing ring at the bottom of the block and the sealing gasket at the contact point between the sewage pipe and the connecting rod effectively prevent sewage leakage, avoiding sewage pollution to the environment. At the same time, it prevents problems such as reduced sewage discharge efficiency and equipment corrosion caused by leakage, ensuring that the sewage discharge process is efficient and environmentally friendly. Attached Figure Description

[0014] Figure 1 is a schematic diagram of the overall structure of this utility model;

[0015] Figure 2 is a first-view schematic diagram of the cross-sectional structure of this utility model;

[0016] Figure 3 is a second-view schematic diagram of the cross-sectional structure of this utility model;

[0017] Figure 4 is a schematic diagram showing the partial structural disassembly effect of this utility model.

[0018] In the diagram: 1. Separator body; 2. Gas-liquid inlet pipe; 3. Exhaust pipe; 4. Liquid outlet pipe; 5. Fixing ring; 6. Support leg; 7. Base plate; 8. Fixing frame; 9. Protective block; 10. Sewage discharge block; 11. One-way valve; 12. Sewage discharge pipe; 13. Flow sensor; 14. Electric ball valve; 15. Demister; 16. Baffle; 17. Electric telescopic rod; 18. Block; 19. Connecting rod; 20. Sealing ring; 21. Fixing block. Detailed Implementation

[0019] The technical solution of this patent will be further described in detail below with reference to specific embodiments.

[0020] As shown in Figures 1-4, this utility model provides a technical solution:

[0021] The gas-liquid separator U-shaped sewage discharge and backflow prevention device includes a separator body 1. A sewage discharge block 10 is connected to the bottom of the separator body 1. A sewage discharge pipe 12 is threaded to the bottom of the sewage discharge block 10. A fixing block 21 is fixedly connected to the outside of the sewage discharge pipe 12 directly below the sewage discharge block 10. A connecting rod 19 is movably connected inside the fixing block 21. A plug 18 is fixedly connected to the end of the connecting rod 19. A sealing ring 20 is fixedly connected to the bottom of the plug 18. The sewage discharge block 10 has an inverted trapezoidal structure inside. The plug 18 also has a trapezoidal structure and fits against the inner wall of the sewage discharge block 10. The outside of the separator body 1 is fixedly equipped with a... The device is equipped with a fixed frame 8, and an electric telescopic rod 17 is fixedly installed inside the fixed frame 8. The output end of the electric telescopic rod 17 is fixedly connected to the bottom end of the connecting rod 19. The connecting rod 19 movably passes through the fixed block 21 and the sewage pipe 12. A sealing gasket is provided at the contact part between the sewage pipe 12 and the connecting rod 19. An electric ball valve 14 is connected to the end of the sewage pipe 12 away from the sewage block 10. A flow sensor 13 is provided on the outside of the sewage pipe 12 above the electric ball valve 14. A control unit that works with the flow sensor 13 and the electric telescopic rod 17 is provided on one side of the fixed frame 8.

[0022] Specifically, the wastewater separated within the gas-liquid separator body 1 enters the drain pipe 12 via the bottom-connected drain block 10, and is then discharged through the electric ball valve 14. During this process, the block 18, in its initial state, does not obstruct the flow of wastewater, allowing it to pass smoothly through the drain pipe 12. When it is necessary to stop the discharge, the flow sensor 13 monitors the wastewater flow rate within the drain pipe 12 in real time and transmits the data to the control unit. The control unit, according to the pre-set program, first controls the electric telescopic rod 17 to start. The output end of the electric telescopic rod 17 pushes the connecting rod 19 upwards. 19 causes the block 18 to rise. Since the block 18 has a trapezoidal structure and adheres to the inner wall of the drain block 10, as the block 18 rises, it gradually seals the connection between the drain block 10 and the drain pipe 12, causing the sewage flow to gradually decrease. When the block 18 completely adheres to the inner wall of the drain block 10, almost blocking the sewage flow, the control unit then controls the electric ball valve 14 to close, completing the closure of the sewage discharge channel. If sewage needs to be discharged again, the control unit controls the electric ball valve 14 to open, and then controls the electric telescopic rod 17 to retract, causing the connecting rod 19 and the block 18 to descend, thus... The block 18 separates from the inner wall of the drain block 10, allowing sewage to be discharged again through the drain block 10 and the drain pipe 12. The electric telescopic rod 17 first drives the block 18 to seal the drain block 10, gradually reducing the sewage flow rate. Then, the electric ball valve 14 is closed, avoiding the water hammer effect caused by the sudden drop in water flow rate when the valve is closed directly in the traditional way. This reduces problems such as pipe vibration, loosening of connecting parts, and pipe rupture caused by the water hammer effect, ensuring the safe and stable operation of the equipment and extending its service life. The flow sensor 13 monitors the flow rate in real time. With the precise control of the electric telescopic rod 17 and the electric ball valve 14 by the control unit, the sewage discharge speed and closing timing can be flexibly adjusted according to the actual working conditions. Whether it is the sewage discharge demand of different flow rates or the need to cope with complex operating environments, precise control can be achieved, improving the reliability and adaptability of the equipment operation. The sealing ring 20 at the bottom of the block 18 and the sealing gasket at the contact point between the drain pipe 12 and the connecting rod 19 effectively prevent sewage leakage, avoid sewage leakage from causing environmental pollution, and prevent problems such as reduced sewage discharge efficiency and equipment corrosion caused by leakage, ensuring the efficiency and environmental protection of the sewage discharge process.

[0023] A gas-liquid inlet pipe 2 is provided on one side of the separator body 1. A baffle 16 is provided on the inner side of the separator body 1 at the opening of the gas-liquid inlet pipe 2. A demister 15 is snapped on the inner side of the separator body 1 above the baffle 16. An exhaust pipe 3 is provided on the top of the separator body 1. A liquid outlet pipe 4 is provided on the side of the separator body 1 away from the gas-liquid inlet pipe 2. A fixing ring 5 is fixedly installed on the outer side of the separator body 1. Multiple sets of support legs 6 are fixedly connected to the outer side of the fixing ring 5. A base plate 7 is fixedly connected to the bottom of the support legs 6. The diameter of the base plate 7 is larger than the diameter of the fixing ring 5.

[0024] Specifically, the gas-liquid inlet pipe 2, in conjunction with the baffle 16, changes the flow direction and buffers the flow velocity of the gas-liquid mixture entering the separator body 1, preventing direct impact of gas and liquid on the inner wall of the equipment and reducing wear. Simultaneously, this design allows for more even distribution of gas and liquid within the separator, creating favorable conditions for subsequent separation processes. The demister 15 is snap-fitted onto the baffle 16, efficiently removing tiny droplets carried in the gas-liquid mixture, further improving gas purity. The snap-fit ​​installation facilitates disassembly and replacement, making cleaning and maintenance of the demister 15 convenient and ensuring long-term stable demister performance. The exhaust pipe 3 and liquid outlet pipe 4 are separate... The gas and liquid are not placed on the top and sides of the separator body 1, so that the separated gas and liquid can be discharged smoothly along the predetermined path, avoiding gas and liquid re-mixing, ensuring the separation effect and smooth discharge of liquid and gas. The fixed ring 5, support leg 6 and base plate 7 form a stable support structure. Multiple sets of support legs 6 are evenly distributed on the outside of the fixed ring 5 to distribute the weight of the separator body 1 to the ground. The diameter of the base plate 7 is larger than the diameter of the fixed ring 5, which increases the contact area with the ground, lowers the center of gravity of the equipment, effectively improves the stability of the gas-liquid separator during operation, and prevents the separation effect from being affected by shaking or tilting, or even causing safety accidents.

[0025] A one-way valve 11 is threadedly connected inside the sewage pipe 12 below the sewage block 10. A protective block 9 is bolted inside the fixing frame 8. An electric telescopic rod 17 is located inside the protective block 9.

[0026] Specifically, the one-way valve 11 is located below the drain block 10 in the drain pipe 12. With its one-way conduction characteristic, it prevents the liquid from flowing back and prevents the separated sewage from flowing back to the gas-liquid separator or other pipes, thus ensuring the normal operation and separation effect of the gas-liquid separation system.

[0027] The working principle of this utility model is as follows:

[0028] First, the wastewater separated in the main body 1 of the gas-liquid separator enters the sewage pipe 12 through the sewage block 10 and is discharged through the electric ball valve 14. In the initial state, the block 18 does not obstruct the flow of wastewater. When it is necessary to stop the sewage discharge, the flow sensor 13 monitors the flow rate of wastewater in the sewage pipe 12 and transmits the data to the control unit. The control unit first starts the electric telescopic rod 17, which drives the block 18 to rise through the connecting rod 19. Using the trapezoidal structure of the block 18 and the inner wall of the sewage block 10, the connection is gradually sealed, so that the flow rate of wastewater gradually decreases. After the block 18 is completely sealed and blocks the flow of wastewater, the control unit closes the electric ball valve 14 to avoid the water hammer effect caused by the traditional sudden valve closure. At the same time, the flow sensor 13 and the control unit work together to flexibly adjust the sewage discharge speed and closing time according to the actual working conditions.

[0029] Secondly, the gas-liquid mixture enters the separator body 1 from the gas-liquid inlet pipe 2. The baffle 16 changes its flow direction and buffers the flow rate, so that the gas and liquid are evenly distributed, creating conditions for separation. The demister 15 is snapped on the baffle 16 to efficiently remove tiny droplets, improve gas purity, and facilitate disassembly and maintenance. The separated gas is discharged from the top exhaust pipe 3, and the liquid is discharged from the side liquid outlet pipe 4 to prevent the gas and liquid from mixing again, ensuring the separation effect and the smoothness of liquid and gas discharge.

[0030] It is worth mentioning that the one-way valve 11 located below the sewage block 10 in the sewage pipe 12 prevents liquid backflow and ensures the normal operation and separation effect of the gas-liquid separation system.

[0031] Finally, the fixing ring 5, the support leg 6 and the base plate 7 form a stable support structure. Multiple sets of support legs 6 are evenly distributed to disperse the weight of the equipment. The larger diameter base plate 7 increases the contact area with the ground and lowers the center of gravity, thereby improving the operational stability of the gas-liquid separator. The protective block 9 inside the fixing frame 8 wraps around the electric telescopic rod 17 to prevent damage from external debris and sewage, ensuring the normal operation of the electric telescopic rod 17 and guaranteeing the reliability of the linkage control between the block 18 and the main drain valve.

[0032] The preferred embodiments of the present invention have been described in detail above. However, the present invention is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present invention.

Claims

1. A U-shaped backflow prevention device for gas-liquid separator, comprising a separator body (1), characterized in that: The bottom of the separator body (1) is connected to a drain block (10), and the bottom of the drain block (10) is threaded with a drain pipe (12). A fixing block (21) is fixedly connected to the outside of the drain pipe (12) directly below the drain block (10). A connecting rod (19) is movably connected inside the fixing block (21). A plug (18) is fixedly connected to the end of the connecting rod (19). A sealing ring (20) is fixedly connected to the bottom of the plug (18). The inside of the drain block (10) is an inverted trapezoidal structure. The plug (18) is also a trapezoidal structure and fits against the inner wall of the drain block (10). A fixing frame (8) is fixedly installed on the outside of the separator body (1). The inside of the fixing frame (8) is fixedly... An electric telescopic rod (17) is fixedly installed. The output end of the electric telescopic rod (17) is fixedly connected to the bottom end of the connecting rod (19). The connecting rod (19) movably passes through the fixed block (21) and the sewage pipe (12). A sealing gasket is provided at the contact part between the sewage pipe (12) and the connecting rod (19). An electric ball valve (14) is connected to the end of the sewage pipe (12) away from the sewage block (10). A flow sensor (13) is provided on the outside of the sewage pipe (12) above the electric ball valve (14). A control unit that works with the flow sensor (13) and the electric telescopic rod (17) is provided on one side of the fixed frame (8).

2. The gas-liquid separator U-shaped blowdown anti-backflow device according to claim 1, characterized in that: A gas-liquid inlet pipe (2) is provided on one side of the separator body (1). A baffle (16) is provided on the inner side of the separator body (1) at the opening of the gas-liquid inlet pipe (2). A demister (15) is snapped on the inside of the separator body (1) above the baffle (16). An exhaust pipe (3) is provided on the top of the separator body (1). A liquid outlet pipe (4) is provided on the side of the separator body (1) away from the gas-liquid inlet pipe (2).

3. The U-shaped backflow prevention device for gas-liquid separator according to claim 2, characterized in that: A fixing ring (5) is fixedly installed on the outside of the separator body (1). Multiple sets of support legs (6) are fixedly connected to the outside of the fixing ring (5). A base plate (7) is fixedly connected to the bottom of the support legs (6). The diameter of the base plate (7) is larger than the diameter of the fixing ring (5).

4. The U-shaped backflow prevention device for gas-liquid separator according to claim 3, characterized in that: A one-way valve (11) is threadedly connected inside the drain pipe (12) below the drain block (10).

5. The U-shaped backflow prevention device for gas-liquid separator according to claim 4, characterized in that: The fixed frame (8) is connected to a protective block (9) by bolts, and the electric telescopic rod (17) is located inside the protective block (9).

Images