Steam overflow preventing device for overflow pipe of deaerator

Abstract

The utility model relates to a steam overflow prevention device for a deaerator overflow pipe, which is characterized in that movable plates are slidably mounted at the bottoms of both sides in a tank body, mounting frames are fixedly embedded at both ends of the side edge of the top of the tank body, sealing baffles are slidably mounted on both sides in each mounting frame in a penetrating manner, and the sealing baffles are positioned in the tank body; under the floating effect of the floating air bag on the movable plate, along with continuous rising of the water level, corresponding horizontal pulling force can be provided for the sealing baffles, then the two sealing baffles can horizontally and relatively move into the containing frame from the interior of the mounting frame, and after the bottom of the mounting frame is in an open state, the sealing baffles can be sealed. The water body in the tank body can penetrate through the liquid discharging pipe to be rapidly discharged in time, meanwhile, in the daily use process of the interior of the tank body, the sealing baffle can block the interior of the mounting frame, it is avoided that steam in the tank body randomly penetrates through the liquid discharging pipe and leaks, and the use flexibility of communication and closing of the liquid discharging pipe is improved.

Description

Technical Field

[0001] This utility model relates to the field of deaerator technology, specifically to a steam overflow prevention device for deaerator overflow pipes. Background Technology

[0002] A deaerator is a key device in a thermal system used to remove dissolved oxygen from boiler feedwater. It heats the feedwater to its boiling point, causing oxygen to be released and preventing oxidation and corrosion of the equipment. Its structure includes a shell, steam inlet, water distribution device, and exhaust pipe. It achieves efficient deoxygenation through sufficient contact between steam and water. The deaerator overflow pipe, usually located at the top of the equipment, is used to discharge excess steam or regulate the water level, ensuring safe operation. When there is excessive feedwater or steam condensation, the overflow pipe automatically drains the liquid, preventing the deaerator from overflowing and causing malfunctions. Working together, both components ensure water quality safety and maintain system pressure balance. Widely used in thermal power, chemical, and other fields, it is a crucial support for the stable operation of thermal cycles.

[0003] According to the published patent CN219346435U, a steam overflow prevention device for a deaerator overflow pipe includes a deaerator water tank and a transition cylindrical tank. A tower head is integrally installed at the upper end of the deaerator water tank. A deaerator overflow pipe is connected between the front end of the deaerator water tank and the transition cylindrical tank. A channel steel bracket is positioned and installed at the bottom of the transition cylindrical tank. A water seal drain port is connected to the front end of the transition cylindrical tank. A labyrinth-type water seal is integrally connected to the top of the transition cylindrical tank. A steam overflow prevention port is connected to the upper end of the transition cylindrical tank. A deaerator drain pipe is connected to the rear end of the transition cylindrical tank. A labyrinth cover plate is positioned and installed at the upper end of the transition cylindrical tank. This utility model discloses a steam overflow prevention device for a deaerator overflow pipe. The overflow pipe incorporates a labyrinthine water seal to effectively prevent steam overflow from the deaerator, reducing waste and control costs, thus ensuring stable deaerator operation. However, in actual use, when using the overflow pipe to protect the water level inside the tank, a control valve is installed at the bottom of the overflow pipe to seal the water inside the tank. During this process, the operator needs to open the control valve and observe the water level inside the tank through the overflow pipe. Since the overflow pipe cannot automatically open and close based on the water level, steam generated inside the tank due to heat can escape through the overflow pipe under its own upward force when the control valve is opened. This steam loss can easily affect the heat loss inside the tank and simultaneously cause the control valve to not open and close in time, preventing water from escaping through the overflow pipe. This can lead to excessive internal pressure in the tank, causing damage to the tank itself.

[0004] For example, during water filling and heating evaporation inside the tank, as water is continuously injected, if the external control valve malfunctions and causes excessive water flow, water accumulates inside the tank, leading to a rise in water level and excessive water pressure. At this point, the operator needs to constantly monitor the water level and open the control valve on the overflow pipe. During this process, steam inside the tank will escape through the overflow pipe, causing heat loss and waste. Furthermore, if the overflow pipe cannot be closed promptly, water may fail to drain properly due to delayed operation. Therefore, a new technical solution is needed to address this issue. Utility Model Content

[0005] The purpose of this utility model is to overcome the shortcomings of the existing technology, adapt to practical needs, and provide a steam overflow prevention device for the overflow pipe of a deaerator. This device solves the problem that when water is continuously injected into the tank for filling and heating evaporation, if the external control valve is damaged and the water flow is excessive, water accumulates inside the tank, causing the water level to rise and the water pressure to become too high. At this time, the operator needs to constantly observe the water level and open the control valve on the surface of the overflow pipe. During this process, steam inside the tank will be discharged from the tank through the overflow pipe, causing heat loss and waste. Furthermore, the overflow pipe is easily blocked due to failure to connect it in a timely and quick manner, which can easily lead to water not being able to be discharged from the overflow pipe due to untimely operation.

[0006] To achieve the purpose of this utility model, the technical solution adopted by this utility model is as follows: a steam overflow prevention device for deaerator overflow pipe is designed, including a tank body, movable plates are slidably installed on the bottom of both sides inside the tank body, and mounting frames are fixedly embedded at both ends of the top side of the tank body. A sealing baffle is slidably installed through both sides inside each mounting frame, and the sealing baffle is located inside the tank body.

[0007] Each of the mounting frames is fixedly equipped with a storage frame on its side, and a hollow tube is fixedly installed at the middle of the side of each storage frame. A reset mechanism is provided inside the hollow tube, and the reset mechanism is connected to the sealing baffle in a driving manner. A transmission mechanism is provided on the outside of the hollow tube and the top of the movable plate, and the transmission mechanism is connected to the reset mechanism in a driving manner.

[0008] Preferably, the transmission mechanism includes an abutting block and a pushing block. Pushing blocks are fixedly installed on both sides of the top of each movable plate. A fixed plate is movably fitted to the side of each hollow tube away from the storage frame. A connecting plate is horizontally fixedly installed at both ends of the side of each fixed plate. An abutting block is fixedly installed between the sides of every two sets of connecting plates. A floating airbag is fixedly installed on the four sides of the bottom of each movable plate.

[0009] Preferably, the reset mechanism includes a reset spring, a push plate is slidably installed inside each hollow tube on the side near the storage frame, a connecting rod is fixedly installed at the middle of the side of each push plate, and the top of the side of the connecting rod is fixedly connected to the outside of the sealing baffle, a transmission rod is fixedly installed at the middle of the other side of each push plate, and the top of the side of the transmission rod is fixedly connected to the outside of the fixed plate, and a reset spring is movably sleeved on the outside of each transmission rod.

[0010] Preferably, each of the top sides of the tank is vertically fixed with a guide tube, and each of the movable plates is vertically fixed with a movable rod at its top, with the top of the movable rod slidingly inserted into the guide tube.

[0011] Preferably, a pressing plate is slidably installed on the bottom inner side of each guide tube, and the top of the movable rod and the bottom of the pressing plate are fixedly connected. A push spring is movably installed inside each guide tube.

[0012] Preferably, sealing gaskets are fixedly bonded to both ends of the side of each sealing baffle, and a drain pipe is fixedly installed through the middle of the top of each mounting frame.

[0013] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0014] 1. This utility model features an installation frame at the bottom of the drain pipe, with a horizontally movable or relatively movable sealing baffle inside the frame. Combined with a movable plate inside the tank and multiple floating airbags at the bottom of the movable plate, as the water level rises, the water provides buoyancy to the floating airbags and the movable plate. This causes the movable plate to move vertically along with a push block on its surface until the water level reaches the critical value for pressure relief and overflow. At this point, the movable plate causes the push block to rise synchronously, aligning the top slope of the push block with the bottom slope of the abutment block. As the water level continues to rise, the push block continues to move upwards. At the same time, it can push the abutment blocks, allowing the two sets of abutment blocks to move horizontally relative to each other on both sides of the outside of the mounting frame. Then, under the connection and transmission of the connecting rod and the transmission rod, it can provide the sealing baffle with the corresponding horizontal pulling force, so that the two sets of sealing baffles can move horizontally relative to each other from inside the mounting frame to inside the storage frame. After the bottom of the mounting frame is in an open state, the water inside the tank can be discharged in a timely and rapid manner through the drain pipe. At the same time, during daily use inside the tank, the sealing baffle can seal the inside of the mounting frame to prevent the steam inside the tank from leaking through the drain pipe, thus improving the flexibility of the drain pipe's connection and closure.

[0015] 2. This utility model features a guide tube on the outside of the tank and a movable rod connected to the outside of the movable plate slidably inserted into the guide tube. Combined with the guiding sliding action of the guide tube on the movable rod, when the movable plate moves vertically under the buoyancy of the water inside the tank, it can only move vertically inside the tank without lateral tilting. This ensures the reasonable and sufficient abutment transmission of the pushing block and the abutment block at the top of the movable plate. Furthermore, combined with the pushing spring's abutment-restoring pushing action on the squeezing plate and the movable rod, after the water level inside the tank drops and returns to its original position, the pushing spring can provide the squeezing plate and the movable plate with corresponding restoring pushing force. This allows the squeezing plate and the movable plate to return to their original positions, thereby driving the sealing baffle to return to its original position. This ensures the sealing baffle's stability in preventing leakage inside the mounting frame and the reusability of the overall mechanism. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall three-dimensional structure of the present invention;

[0017] Figure 2 This is a schematic diagram of the overall structure of the movable plate and sealing baffle of this utility model;

[0018] Figure 3 This is a schematic diagram of the internal structure of the mounting frame of this utility model;

[0019] Figure 4 This is a schematic diagram of the internal structure of the guide tube of this utility model;

[0020] In the diagram: 1. Tank body; 11. Movable plate; 12. Mounting frame; 13. Sealing baffle; 14. Drain pipe;

[0021] 2. Storage frame; 21. Hollow tube; 22. Push plate; 23. Connecting rod; 24. Transmission rod; 25. Fixing plate; 26. Connecting plate; 27. Abutting block; 28. Pushing block; 29. ​​Return spring;

[0022] 3. Floating airbags; 31. Sealing gaskets;

[0023] 4. Guide tube; 41. Movable rod; 42. Extrusion plate; 43. Push spring. Detailed Implementation

[0024] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0025] Example 1: A steam overflow prevention device for a deaerator overflow pipe, see [link / reference] Figures 1 to 4The tank body 1 has movable plates 11 slidably installed on the bottom of both sides inside. The tank body 1 has mounting frames 12 fixedly embedded at both ends of the top side. Each mounting frame 12 has a sealing baffle 13 slidably installed through both sides inside, and the sealing baffle 13 is located inside the tank body 1. Each sealing baffle 13 has a sealing gasket 31 fixedly bonded to both ends of its side. Each mounting frame 12 has a drain pipe 14 fixedly installed through the middle of its top. The sealing gasket 31 and the floating airbag 3 are both made of high temperature resistant material.

[0026] When water is injected into the tank 1 from the outside to the inside of the tank 1 for deoxygenation using a pipeline, as water is continuously injected into the tank 1, when the water evaporation rate and the water injection rate are balanced, water cannot accumulate inside the tank 1. As a result, the movable plate 11 cannot move to the top of the tank 1. At this time, the sealing baffle 13 is located inside the mounting frame 12 and fits together to seal the inside of the mounting frame 12, so that the steam inside the tank 1 cannot overflow through the drain pipe 14, resulting in heat loss inside the tank 1.

[0027] For details, see Figures 1 to 4 Each mounting frame 12 has a storage frame 2 fixedly installed on its side. Each storage frame 2 has a hollow tube 21 fixedly installed at the middle of its side. Each movable plate 11 has a push block 28 fixedly installed on both sides of its top. Each hollow tube 21 has a fixed plate 25 movably fitted on the side away from the storage frame 2. Each fixed plate 25 has a connecting plate 26 fixedly installed horizontally at both ends of its side. Each pair of connecting plates 26 has a stop block 27 fixedly installed between its sides. The vertical cross-section of the stop block 27 and the push block 28 is a right triangle. Each movable plate 11 has a floating airbag 3 fixedly installed on its four sides at the bottom.

[0028] For example, when the water level inside tank 1 increases, causing excessive water pressure, in order to prevent damage to tank 1, as the water level rises, the movable plate 11 and the pushing block 28 rise synchronously. Combined with the pushing action of the pushing block 28 on the abutting block 27, the sealing baffle 13 can be moved horizontally from inside the mounting frame 12 to inside the receiving frame 2, so that the mounting frame 12 and the drain pipe 14 can remain connected to allow the water inside tank 1 to overflow and be discharged. In the traditional technology, as the water inside tank 1 accumulates, the operator needs to manually control the opening and closing of the control valve located outside the overflow pipe. If the operation is not timely and the opening and closing control of the overflow pipe is not timely, the water inside tank 1 cannot be discharged in time, causing damage to tank 1. Or, when the water level is at a safe level, after the overflow pipe is connected and controlled, the steam inside tank 1 can easily leak out through the overflow pipe, causing waste and loss of heat inside tank 1.

[0029] In this application, as the water injection rate increases or the evaporation rate decreases, causing water to continuously accumulate inside the tank 1 and the water level inside the tank 1 to rise continuously, the water provides a corresponding buoyancy force to the floating airbag 3. The floating airbag 3 then drives the movable plate 11 to move vertically inside the tank 1 until the water reaches the overflow threshold inside the tank 1. At this point, the movable plate 11 drives the push block 28 to move and adhere to the bottom of the abutment block 27, so that the top inclined surface of the push block 28 and the inclined surface of the abutment block 27 are in contact. As the water continues to accumulate and the water level continues to rise, the movable plate 11 drives the push block 28 to move vertically in sync, and the inclined surface of the push block 28 adheres to the abutment block 27. After the inclined plane causes abutment, the two sets of abutment blocks 27 can move horizontally relative to each other on the outside of the mounting frame 12 as the water level rises. Then, under the connecting transmission action of the connecting plate 26, the fixing plate 25 can move horizontally outward on the outside of the hollow tube 21. Then, under the connecting transmission action of the connecting rod 23 and the transmission rod 24, the sealing baffle 13 can move horizontally relative to each other inside the mounting frame 12 and into the storage frame 2. After the bottom of the mounting frame 12 is in an open position, the water inside the tank 1 can flow through the mounting frame 12 into the drain pipe 14, thereby overflowing and discharging the excess water inside the tank 1.

[0030] After the sealing baffle 13 is fully moved horizontally out of the inside of the mounting frame 12, allowing water to be discharged from the drain pipe 14, the pushing block 28 then fully abuts the abutting block 27. After the abutting block 27 moves to the lower side of the pushing block 28, the top of the pushing block 28 passes between the two sets of pushing plates 22 without contacting the outside of the fixed plate 25. At the same time, the top of the pushing block 28 contacts the top of the inner wall of the tank 1, abutting the pushing block 28 and preventing it from moving vertically. At this time, the sealing baffle 13 is completely moved out of the inside of the mounting frame 12, and the bottom of the mounting frame 12 is completely open, allowing the water inside the tank 1 to be quickly discharged through the mounting frame 12 and the drain pipe 14 for pressure relief.

[0031] Further, see Figures 1 to 4 Each hollow tube 21 has a push plate 22 slidably installed inside the side near the storage frame 2. Each push plate 22 has a connecting rod 23 fixedly installed at the middle of its side. The top of the side of the connecting rod 23 is fixedly connected to the outside of the sealing baffle 13. The side of the connecting rod 23 extends through the hollow tube 21 and slides into the storage frame 2. Each push plate 22 has a transmission rod 24 fixedly installed at the middle of its other side. The top of the side of the transmission rod 24 is fixedly connected to the outside of the fixing plate 25. The top of the side of the transmission rod 24 extends through the hollow tube 21 and slides to the outside of the hollow tube 21. Each transmission rod 24 has a reset spring 29 movably sleeved on its outside. The two ends of the reset spring 29 are movably attached to the outside of the push plate 22 and the inner wall of the hollow tube 21, respectively.

[0032] It is worth noting that, see Figures 1 to 4 Each tank body 1 has a guide tube 4 vertically fixedly installed on its top side. Each movable plate 11 has a movable rod 41 vertically fixedly installed on its top. The top of the movable rod 41 is slidably installed inside the tank body 1 and extends into the guide tube 4. Each guide tube 4 has a pressing plate 42 slidably installed on its inner bottom side. The top of the movable rod 41 and the bottom of the pressing plate 42 are fixedly connected. Each guide tube 4 has a push spring 43 movably installed inside. The two ends of the push spring 43 are respectively movably attached to the outer top of the pressing plate 42 and the inner side wall of the guide tube 4.

[0033] The spring constants of the push spring 43 and the return spring 29 are relatively small, ensuring that the buoyancy provided by the water to the floating airbag 3 is always greater than the reverse pushing force of the push spring 43 and the return spring 29 on the abutment block 27 and the movable rod 41, respectively.

[0034] As the water level inside the tank 1 continues to drop due to overflow and discharge, the floating force provided by the water to the floating airbag 3 is lost. Combined with the restoring pushing action of the push spring 43 on the squeezing plate 42 and the movable rod 41, the movable rod 41 moves out of the guide tube 4 in sync. The movable plate 11 then descends in sync, driving the push block 28 to descend vertically and lose its resistance to the abutment block 27. Then, combined with the restoring pushing action of the reset spring 29 on the push plate 22, the push plate 22 can move horizontally back to its original position inside the hollow tube 21. This causes the sealing baffle 13 to move horizontally towards each other in sync with the drop in water level and into the mounting frame 12. When the water level drops to the critical value inside the tank 1, the sealing baffle 13 is completely restored to its original position, and the side sealing gaskets 31 fit together to seal the inside of the mounting frame 12, thereby preventing steam inside the tank 1 from leaking through the mounting frame 12 and the drain pipe 14.

[0035] In addition, all components designed in this utility model are general standard parts or components known to those skilled in the art. Their structure and principle can be learned by those skilled in the art through technical manuals or conventional experimental methods. Those skilled in the art can fully implement them, so there is no need to elaborate. The content protected by this utility model does not involve improvements to the internal structure and method.

[0036] The embodiments disclosed herein are preferred embodiments, but are not limited thereto. Those skilled in the art can readily grasp the spirit of this utility model based on the above embodiments and make different extensions and variations. However, as long as they do not depart from the spirit of this utility model, they are all within the protection scope of this utility model.

Claims

1. A steam-overflow-preventing device for an overflow pipe of a deaerator, comprising a tank body (1), characterized in that, The movable plate (11) is slidably installed at the bottom of the tank body (1), the mounting frame (12) is inlaidly installed at the top of the tank body (1), the sealing baffle (13) is slidably installed at the inside of the mounting frame (12), and the sealing baffle (13) is located in the tank body (1). The receiving frame (2) is fixedly installed at the side of the mounting frame (12), the hollow pipe (21) is fixedly installed at the middle end of the receiving frame (2), the reset mechanism is arranged in the hollow pipe (21), the reset mechanism is in transmission connection with the sealing baffle (13), the transmission mechanism is arranged at the outside of the hollow pipe (21) and the top of the movable plate (11), and the transmission mechanism is in transmission connection with the reset mechanism.

2. The steam-overflow-preventing device for the deaerator overflow pipe according to claim 1, characterized by The transmission mechanism comprises the abutting block (27) and the pushing block (28), the pushing block (28) is fixedly installed at the top of the movable plate (11), the fixed plate (25) is movably attached to the side, away from the receiving frame (2), of the hollow pipe (21), the connecting plate (26) is transversely fixedly installed at the two ends of the side of the fixed plate (25), the abutting block (27) is fixedly installed between the sides of every two groups of connecting plates (26), and the floating air bag (3) is fixedly installed at the four sides of the bottom of the movable plate (11).

3. The steam-overflow-preventing device for the deaerator overflow pipe according to claim 1, characterized by The reset mechanism comprises the reset spring (29), the pushing plate (22) is slidably installed at the side, close to the receiving frame (2), of the hollow pipe (21), the connecting rod (23) is fixedly installed at the middle end of the side of the pushing plate (22), the connecting rod (23) is fixedly connected to the outside of the sealing baffle (13) at the top end of the side, the transmission rod (24) is fixedly installed at the other middle end of the pushing plate (22), the transmission rod (24) is fixedly connected to the outside of the fixed plate (25) at the top end of the side, and the reset spring (29) is movably sleeved on the outside of the transmission rod (24).

4. The steam bleed-out preventing device for the deaerator overflow pipe according to claim 1, characterized by The guide pipe (4) is vertically fixedly installed at the side of the top of the tank body (1), the movable rod (41) is vertically fixedly installed at the top of the movable plate (11), and the movable rod (41) is slidably inserted into the inside of the guide pipe (4).

5. The steam-overflow-preventing device for the deaerator overflow pipe according to claim 4, characterized by The extrusion plate (42) is slidably installed at the bottom of the inside of the guide pipe (4), the movable rod (41) is fixedly connected to the bottom of the extrusion plate (42), and the pushing spring (43) is movably arranged in the guide pipe (4).

6. The steam bleed-out preventing device for the deaerator overflow pipe according to claim 1, characterized by The sealing gasket (31) is fixedly attached to the two ends of the side of the sealing baffle (13), and the liquid discharge pipe (14) is fixedly installed at the middle end of the top of the mounting frame (12).

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