Boiler feed water plant with two-cylinder feed water pump

Abstract

This utility model relates to the field of feedwater pump technology and discloses a boiler feedwater supply device using a two-phase steam-driven feedwater pump. It includes a base, on which a turbine body and a feedwater pump body are fixedly mounted. A coupling is fixedly mounted on the output shaft of the turbine body. An inner sealing flange and an outer fixed sealing flange are fixedly mounted on the top of the turbine body. A steam pipe is fixedly mounted on the top of the inner sealing flange. An outer sliding sealing flange is slidably connected to the outer wall of the steam pipe. A pressure regulating pipe and a connecting pipe are fixedly mounted on the outer wall of the steam pipe. A pressure regulating device is fixedly mounted on the outer wall of the connecting pipe. By connecting two connecting hoses to the inlets of two boilers, the feedwater pump body can transmit water to the inside of the two connecting hoses through a diversion pipe, thereby allowing the feedwater pump body to simultaneously supply water to the inside of two boilers, reducing equipment costs and subsequent maintenance costs.

Description

Technical Field

[0001] This utility model relates to the field of feedwater pump technology, specifically a boiler feedwater supply device consisting of a single-drive-two steam-powered feedwater pump. Background Technology

[0002] A steam-driven feedwater pump is a type of feedwater pump driven by a small steam turbine. It belongs to the disciplines of engineering thermophysics and power engineering and is mainly used to pressurize and transport high-temperature saturated water in the deaerator to the boiler.

[0003] Existing steam-driven feedwater pumps can only supply water to a single boiler in actual use. However, in practice, multiple boilers need to be fed water, and the pump can only supply water to a single boiler. This results in the need to equip a large number of steam-driven feedwater pumps, leading to higher costs and subsequent maintenance costs. In addition, leaks may occur between the steam connection pipe of the feedwater pump and the turbine intake pipe during actual use, resulting in steam loss. Utility Model Content

[0004] To address the shortcomings of existing technologies, this utility model provides a boiler feedwater supply device with a one-to-two steam-driven feedwater pump, which has the advantages of simultaneously supplying water to two boilers while controlling the water supply flow rate of both boilers and providing a leakage alarm, thus solving the problems mentioned in the background technology.

[0005] This utility model provides the following technical solution: a boiler feedwater supply device consisting of a base and a turbine body and a feedwater pump body, respectively fixedly mounted on the top of the base. A coupling is fixedly mounted on the output shaft of the turbine body. An inner sealing flange and an outer fixed sealing flange are fixedly mounted on the top of the turbine body. A steam pipe is fixedly mounted on the top of the inner sealing flange. An outer sliding sealing flange is slidably connected to the outer wall of the steam pipe. A pressure regulating pipe and a connecting pipe are fixedly mounted on the outer wall of the steam pipe. A pressure regulating device is fixedly mounted on the outer wall of the connecting pipe. The top of the feedwater pump body is fixedly mounted on... A water supply pipe is fixedly installed, with an inlet pipe fixedly installed at the top of the water supply pipe. One end of the water supply pipe is fixedly installed at the drain outlet of the water pump body, and a diversion pipe is fixedly installed at the other end of the water supply pipe. A flow rate control component is provided on the outer wall of the diversion pipe, and a connecting hose is provided on the outside of the flow rate control component. A pressure plate is slidably connected to the inner wall of the outer sliding sealing flange, and a sealing ring is fixedly installed on the inner wall of the outer sliding sealing flange. A top column is fixedly installed on the top of the pressure plate, and a spring is provided on the inner wall of the pressure plate. A warning light is fixedly installed on the top of the pressure plate, and an elastic trigger switch is fixedly installed at the bottom of the warning light.

[0006] As a preferred technical solution of this utility model: the flow rate control component includes a sealing shell, a sealing tube fixedly installed on the inner wall of the sealing shell, a sealing plate slidably connected to the inner wall of the sealing shell, an extension plate fixedly installed on the top of the sealing plate, a limit plate fixedly installed on the inner wall of the sealing shell, an extension tube fixedly installed on the outer wall of the sealing tube, a second spring provided on the inner wall of the sealing tube, a pressure column fixedly installed on the bottom of the extension plate, a third spring provided on the inner wall of the extension tube, a sealing column slidably connected to the inner wall of the extension tube, a ventilating inclined groove opened on the outer wall of the sealing column, one end of a connecting rod fixedly installed on the side of the sealing column near the third spring, and a sliding frame fixedly installed on the other end of the connecting rod.

[0007] As a preferred technical solution of this utility model: the number of the sealing plate, the pressure column, and the second spring is two, and the two sealing plates, pressure columns, and the second spring are symmetrically arranged on the inner wall of the sealing shell. The ends of the two pressure columns that are close to each other are in contact with the inner wall of the sealing tube, and the connecting air pipe is connected to the sealing tube.

[0008] As a preferred technical solution of this utility model: the sealing column and the inner wall of the extension tube are in contact, and the connecting rod penetrates the inner wall of the extension tube.

[0009] As a preferred technical solution of this utility model: the number of the flow rate control components and the connecting hoses is two, and the two flow rate control components and the connecting hoses are symmetrically arranged at both ends of the diversion pipe.

[0010] As a preferred technical solution of this utility model: the inner diameter of the sealing ring is adapted to the diameter of the steam pipe, and the sealing ring is located between the steam pipe and the outer sliding sealing flange.

[0011] As a preferred technical solution of this utility model: the top column is located at the bottom of the elastic trigger switch, and the outer wall of the pneumatic plate is in contact with the inner wall of the outer sliding sealing flange.

[0012] Compared with the prior art, the present invention has the following beneficial effects:

[0013] 1. This dual-pipe steam-driven feedwater pump system for boilers connects two connecting hoses to the inlets of two boilers. The feedwater pump body, through a diversion pipe, can transfer water into the two connecting hoses, allowing the pump to simultaneously supply water to both boilers. This reduces equipment costs and subsequent maintenance costs. Simultaneously, a pressure regulating device and connecting pipe introduce steam into the sealed pipes, changing the internal pressure and pushing two pressure columns. This movement causes two sealing plates to move, creating a gap between them. Water can then pass through this gap into the connecting hoses, while simultaneously squeezing the sealing columns outwards, causing the venting grooves to leak out. Steam can then be discharged externally through these grooves. The two pressure regulating devices control the steam flow rate into the two sealed pipes, altering the opening and closing of the sealing plates and thus regulating the water supply rate to the two boilers.

[0014] 2. This one-to-two steam-driven feedwater pump system supplies feedwater to the boiler. Steam leaks between the outer fixed sealing flange and the outer sliding sealing flange, increasing the air pressure between them. This pushes the air pressure plate inside the outer sliding sealing flange upward, causing the pressure plate to move the top column upward and compress the spring. When the pressure plate presses the elastic trigger switch, it triggers the switch, causing the warning light to flash, thus alerting nearby personnel. Attached Figure Description

[0015] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0016] Figure 2 This is a schematic diagram of the main structure of the steam turbine of this utility model;

[0017] Figure 3 This is a schematic diagram of the main structure of the water pump of this utility model;

[0018] Figure 4 This is a schematic diagram of the external sliding sealing flange structure of this utility model;

[0019] Figure 5 This is a schematic cross-sectional view of the flow rate control component of this utility model;

[0020] Figure 6 This is a schematic diagram of the cross-sectional structure of the sealing tube of this utility model.

[0021] In the diagram: 1. Base; 2. Steam turbine body; 3. Feedwater pump body; 4. Coupling; 5. Inner sealing flange; 6. Steam pipe; 7. Outer fixed sealing flange; 8. Outer sliding sealing flange; 9. Pressure regulating pipe; 10. Connecting air pipe; 11. Pressure regulating device; 12. Water supply pipe; 13. Inlet pipe; 14. Feedwater pipe; 15. Diverter pipe; 16. Flow rate control assembly; 17. Sealing ring; 18. Pressure plate; 19. Top column; 20. Spring 1; 21. Warning light; 22. Elastic trigger switch; 23. Connecting hose;

[0022] 1601. Sealing shell; 1602. Sealing tube; 1603. Sealing plate; 1604. Extension plate; 1605. Limiting plate; 1606. Extension tube; 1607. Spring 2; 1608. Pressure column; 1609. Sliding frame; 1610. Spring 3; 1611. Sealing column; 1612. Ventilation groove; 1613. Connecting rod. Detailed Implementation

[0023] 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.

[0024] Please see Figure 1 - Figure 6 A boiler feedwater supply device consisting of a base 1 and a turbine body 2 and a feedwater pump body 3 are fixedly mounted on the top of the base 1. A coupling 4 is fixedly mounted on the output shaft of the turbine body 2. An inner sealing flange 5 and an outer fixed sealing flange 7 are fixedly mounted on the top of the turbine body 2. A steam pipe 6 is fixedly mounted on the top of the inner sealing flange 5. An outer sliding sealing flange 8 is slidably connected to the outer wall of the steam pipe 6. A pressure regulating pipe 9 and a connecting gas pipe 10 are fixedly mounted on the outer wall of the steam pipe 6. A pressure regulating device 11 is fixedly mounted on the outer wall of the connecting gas pipe 10. A water supply pipe 12 is fixedly mounted on the top of the feedwater pump body 3. A water inlet pipe 13 is fixedly installed on the top of the pump body 2. One end of a water supply pipe 14 is fixedly installed at the drain outlet of the water pump body 3. A diversion pipe 15 is fixedly installed at the other end of the water supply pipe 14. A flow rate control component 16 is provided on the outer wall of the diversion pipe 15. A connecting hose 23 is provided on the outside of the flow rate control component 16. A pressure plate 18 is slidably connected to the inner wall of the outer sliding sealing flange 8. A sealing ring 17 is fixedly installed on the inner wall of the outer sliding sealing flange 8. A top column 19 is fixedly installed on the top of the pressure plate 18. A spring 20 is provided on the inner wall of the pressure plate 18. A warning light 21 is fixedly installed on the top of the pressure plate 18. An elastic trigger switch 22 is fixedly installed at the bottom of the warning light 21.

[0025] In the above structure, the output shaft of the turbine body 2 and the input shaft of the feedwater pump body 3 are connected by the coupling 4. When steam enters the interior of the turbine body 2 through the steam pipe 6, the steam force drives the drive shaft of the turbine body 2, causing the turbine body 2 to drive the coupling 4 to rotate. At the same time, the coupling 4 drives the feedwater pump body 3 to rotate.

[0026] In a preferred embodiment: the flow rate control assembly 16 includes a sealing shell 1601, a sealing tube 1602 fixedly installed on the inner wall of the sealing shell 1601, a sealing plate 1603 slidably connected to the inner wall of the sealing shell 1601, an extension plate 1604 fixedly installed on the top of the sealing plate 1603, a limit plate 1605 fixedly installed on the inner wall of the sealing shell 1601, an extension tube 1606 fixedly installed on the outer wall of the sealing tube 1602, a second spring 1607 provided on the inner wall of the sealing tube 1602, a pressure column 1608 fixedly installed on the bottom of the extension plate 1604, a third spring 1610 provided on the inner wall of the extension tube 1606, a sealing column 1611 slidably connected to the inner wall of the extension tube 1606, a ventilating inclined groove 1612 opened on the outer wall of the sealing column 1611, one end of a connecting rod 1613 fixedly installed on the side of the sealing column 1611 near the third spring 1610, and a sliding frame 1609 fixedly installed on the other end of the connecting rod 1613.

[0027] In the above structure, the sealing plate 1603 is penetrated by the limiting plate 1605, so that when the sealing plate 1603 slides, it can only slide on the outer wall of the limiting plate 1605. This limits the sealing plate 1603, preventing it from tilting when moving. At the same time, the water flow speed is controlled by controlling the opening and closing size of the sealing plate 1603.

[0028] In a preferred embodiment, there are two sealing plates 1603, pressure columns 1608, and springs 1607, and the two sealing plates 1603, pressure columns 1608, and springs 1607 are symmetrically arranged on the inner wall of the sealing shell 1601. The ends of the two pressure columns 1608 that are close to each other are in contact with the inner wall of the sealing tube 1602, and the connecting air tube 10 is connected to the sealing tube 1602.

[0029] In the above structure, steam is introduced into the sealing pipe 1602 of the gas pipe 10, thereby increasing the gas pressure inside the sealing pipe 1602. This causes the two pressure columns 1608 to move upward and downward under the influence of the gas pressure, which in turn compresses the two springs 1607. At the same time, the two sealing plates 1603 move and separate, allowing water to pass between the two sealing plates 1603. Meanwhile, the amount of steam entering the sealing pipe 1602 is controlled by the gas pressure regulating device 11, thereby controlling the opening and closing of the sealing plates 1603.

[0030] In a preferred embodiment: the sealing post 1611 and the inner wall of the extension tube 1606 are in contact, and the connecting rod 1613 penetrates the inner wall of the extension tube 1606.

[0031] In the above structure, the extension tube 1606 is attached to the connecting rod 1613, so that the connecting rod 1613 is limited when moving, thereby limiting the sealing column 1611 so that the sealing column 1611 will not tilt when moving during actual use.

[0032] In a preferred embodiment, there are two flow rate control components 16 and two connecting hoses 23, and the two flow rate control components 16 and two connecting hoses 23 are symmetrically arranged at both ends of the diversion pipe 15.

[0033] In the above structure, water is transmitted to the flow rate control components 16 on both sides through the diversion pipe 15, the flow rate control components 16 on both sides are used to adjust the water volume, and the two connecting hoses 23 are connected to the two boilers, so that the two connecting hoses 23 can supply water to the inside of the two boilers.

[0034] In a preferred embodiment, the inner diameter of the sealing ring 17 is adapted to the diameter of the steam pipe 6, and the sealing ring 17 is located between the steam pipe 6 and the outer sliding sealing flange 8.

[0035] In the above structure, the sealing ring 17 is located between the outer sliding sealing flange 8 and the steam pipe 6, so that the sealing ring 17 fills the gap between the outer sliding sealing flange 8 and the steam pipe 6, so that the gas inside the outer fixed sealing flange 7 and the outer sliding sealing flange 8 cannot be discharged to the outside through the sealing ring 17, and at the same time, the gas outside the outer fixed sealing flange 7 and the outer sliding sealing flange 8 cannot enter the inside.

[0036] In a preferred embodiment, the top post 19 is located at the bottom of the elastic trigger switch 22, and the outer wall of the pneumatic plate 18 is in contact with the inner wall of the outer sliding sealing flange 8.

[0037] In the above structure, when steam leaks, steam enters the interior of the outer fixed sealing flange 7 and the outer sliding sealing flange 8. At this time, the air pressure inside the outer fixed sealing flange 7 and the outer sliding sealing flange 8 increases, which in turn pushes the air pressure plate 18 upward, causing the air pressure plate 18 to drive the top column 19 to move upward, thereby causing the top column 19 to come into contact with the bottom of the elastic trigger switch 22, so that the top column 19 triggers the warning light 21 through the elastic trigger switch 22, causing the warning light 21 to flash.

[0038] Working Principle: When the equipment is in use, steam is input into the turbine body 2 through steam pipe 6. The steam force drives the drive shaft of the turbine body 2, causing the turbine body 2 to rotate the coupling 4. Simultaneously, the coupling 4 drives the feedwater pump body 3 to rotate, causing the feedwater pump body 3 to discharge water into the feedwater pipe 14 through the inlet pipe 13. The water then enters the diversion pipe 15 through the feedwater pipe 14. At the same time, the steam inside the steam pipe 6 is discharged into the sealing pipe 1602 through the air pressure regulating device 11 and the connecting air pipe 10, causing an air pressure change inside the sealing pipe 1602. This causes the two pressure columns 1608 to move up and down to the sides under the influence of air pressure. In turn, the two pressure columns 1608 compress the two springs 1607, causing the two sealing plates 1603 to move and separate, thus allowing water to pass through. Between the two sealing plates 1603, the amount of steam entering the sealing pipe 1602 is controlled by the air pressure regulating device 11, thereby controlling the opening and closing of the sealing plates 1603. At the same time, excess gas will push the sealing column 1611 to move outward and be discharged to the outside through the venting groove 1612 provided on the outside of the sealing column 1611. The water flow of the two flow rate control components 16 can be precisely controlled by the two air pressure regulating devices 11. When steam leaks, steam enters the interior of the outer fixed sealing flange 7 and the outer sliding sealing flange 8. At this time, the air pressure inside the outer fixed sealing flange 7 and the outer sliding sealing flange 8 increases, which pushes the air pressure plate 18 upward. The air pressure plate 18 drives the top column 19 to move upward, which makes the top column 19 fit with the bottom of the elastic trigger switch 22. The top column 19 triggers the warning light 21 through the elastic trigger switch 22, causing the warning light 21 to flash.

[0039] 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 boiler feedwater supply device consisting of a base (1) and a two-pronged steam-driven feedwater pump, characterized in that: The top of the base (1) is fixedly installed with a turbine body (2) and a feedwater pump body (3). The output shaft of the turbine body (2) is fixedly installed with a coupling (4). The top of the turbine body (2) is fixedly installed with an inner sealing flange (5) and an outer fixed sealing flange (7). The top of the inner sealing flange (5) is fixedly installed with a steam pipe (6). The outer wall of the steam pipe (6) is slidably connected with an outer sliding sealing flange (8). The outer wall of the steam pipe (6) is fixedly installed with a pressure regulating pipe (9) and a connecting pipe (10). The outer wall of the connecting pipe (10) is fixedly installed with a pressure regulating device (11). The top of the feedwater pump body (3) is fixedly installed with a water supply pipe (12). The top of the water supply pipe (12) is fixedly installed with an inlet pipe (1). 3) The drain outlet of the water pump body (3) is fixedly installed with one end of the water supply pipe (14), and the other end of the water supply pipe (14) is fixedly installed with a diversion pipe (15). The outer wall of the diversion pipe (15) is provided with a flow rate control component (16), and the outside of the flow rate control component (16) is provided with a connecting hose (23). The inner wall of the outer sliding sealing flange (8) is slidably connected with a pressure plate (18), and the inner wall of the outer sliding sealing flange (8) is fixedly installed with a sealing ring (17). The top of the pressure plate (18) is fixedly installed with a top column (19), and the inner wall of the pressure plate (18) is provided with a spring (20). The top of the pressure plate (18) is fixedly installed with a warning light (21), and the bottom of the warning light (21) is fixedly installed with an elastic trigger switch (22).

2. The boiler feedwater supply device with a single-drive-two-pronged steam-driven feedwater pump according to claim 1, characterized in that: The flow rate control assembly (16) includes a sealing shell (1601), a sealing tube (1602) fixedly installed on the inner wall of the sealing shell (1601), a sealing plate (1603) slidably connected to the inner wall of the sealing shell (1601), an extension plate (1604) fixedly installed on the top of the sealing plate (1603), a limit plate (1605) fixedly installed on the inner wall of the sealing shell (1601), an extension tube (1606) fixedly installed on the outer wall of the sealing tube (1602), and a spring (2) provided on the inner wall of the sealing tube (1602). 1607), a pressure column (1608) is fixedly installed at the bottom of the extension plate (1604), a spring three (1610) is provided on the inner wall of the extension tube (1606), a sealing column (1611) is slidably connected to the inner wall of the extension tube (1606), a ventilating inclined groove (1612) is opened on the outer wall of the sealing column (1611), one end of a connecting rod (1613) is fixedly installed on the side of the sealing column (1611) near the spring three (1610), and a sliding frame (1609) is fixedly installed on the other end of the connecting rod (1613).

3. The boiler feedwater supply device with a one-to-two steam-driven feedwater pump according to claim 2, characterized in that: The number of the sealing plate (1603), pressure column (1608), and spring two (1607) is two, and the two sealing plates (1603), pressure columns (1608), and spring two (1607) are symmetrically arranged on the inner wall of the sealing shell (1601). The two pressure columns (1608) are close to each other and are attached to the inner wall of the sealing tube (1602). The connecting air tube (10) is connected to the sealing tube (1602).

4. The boiler feedwater supply device with a one-to-two steam-driven feedwater pump according to claim 2, characterized in that: The sealing column (1611) and the inner wall of the extension tube (1606) are in contact, and the connecting rod (1613) penetrates the inner wall of the extension tube (1606).

5. The boiler feedwater supply device with one-to-two steam-driven feedwater pumps according to claim 1, characterized in that: The number of the flow rate control component (16) and the connecting hose (23) is two, and the two flow rate control components (16) and the connecting hose (23) are symmetrically arranged at both ends of the diversion pipe (15).

6. The boiler feedwater supply device with a one-to-two steam-driven feedwater pump according to claim 1, characterized in that: The inner diameter of the sealing ring (17) is adapted to the diameter of the steam pipe (6), and the sealing ring (17) is located between the steam pipe (6) and the outer sliding sealing flange (8).

7. The boiler feedwater supply device with a one-to-two steam-driven feedwater pump according to claim 1, characterized in that: The top post (19) is located at the bottom of the elastic trigger switch (22), and the outer wall of the pneumatic plate (18) is in contact with the inner wall of the outer sliding sealing flange (8).

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