A power plant boiler feed water pump monitoring device

Abstract

The utility model discloses a power plant boiler feed pump monitoring devices, including the feed pump main part, the water outlet of feed pump main part can detachably connect with monitoring mechanism, monitoring mechanism includes the pipe that butt -joins, is equipped with the inclined pipe in the top of butt -joint pipe outer wall, and intercommunication, the water outlet of inclined pipe is connected with the power boiler equipment of outside, the water inlet of feed pump main part is connected with the water inlet pipe of outside. This kind of power plant boiler feed pump monitoring devices, realize the real -time monitoring and buffer protection to the water pressure of feed pump, through setting movable cavity, buffer spring and the piston ring that can move left and right in butt -joint pipe inside, cooperate the water pressure sensor in piston ring, both can real -time monitoring feed water pressure, and can utilize the moving buffer water flow impact of piston ring, avoid the damage of water pressure sudden change to sensor, effectively prolong the service life of water pressure sensor, solved the problem that traditional monitoring equipment is vulnerable to the unstable impact of water flow.

Description

Technical Field

[0001] This utility model relates to the field of boiler feedwater pump technology, specifically a monitoring device for boiler feedwater pumps in power plants. Background Technology

[0002] In energy production scenarios such as thermal power plants and nuclear power plants, boiler feedwater pumps, as core power equipment, undertake the critical task of pressurizing and transporting deoxygenated feedwater to the boiler drum. Their operational stability directly determines the thermodynamic cycle efficiency, unit safety factor, and overall power generation economy of the boiler system.

[0003] Currently, power plants mostly use traditional decentralized monitoring methods to monitor boiler feedwater pumps, relying mainly on the following technologies: offline or semi-online monitoring of macroscopic parameters such as feedwater pressure and flow rate through mechanical pressure gauges, flow meters, or electromagnetic flow meters installed on pipelines. However, when the water flow is unstable, it can cause impact on the monitoring equipment (water pressure sensor), and after long-term use, it will reduce its service life. Therefore, further optimization is proposed to address the above problems. Utility Model Content

[0004] To address the shortcomings of existing technologies, this utility model provides a monitoring device for boiler feedwater pumps in power plants, which solves the problems mentioned in the background section.

[0005] To achieve the above objectives, this utility model is implemented through the following technical solution: a monitoring device for a boiler feedwater pump in a power plant, comprising a feedwater pump body, wherein a monitoring mechanism is detachably connected to the outlet end of the feedwater pump body; The monitoring device includes a connecting pipe, with an inclined pipe on the top of the outer wall of the connecting pipe, and the pipes are interconnected. The outlet of the inclined pipe is connected to an external power generation boiler. The inlet of the main body of the water pump is connected to an external water inlet pipe. A display module is provided on the left side of the inclined pipe. A buffer structure includes a movable cavity inside the connecting pipe, a piston ring that can move left and right inside the movable cavity and communicates with the inclined pipe, a water pressure sensor inside the piston ring, a limiting ring on the inner wall of the movable cavity away from the piston ring on the left side, a guide rod fixedly connected to the left side of the piston ring, a buffer spring sleeved on the outer wall of the guide rod, and a guide member passing through the limiting ring at the other end of the guide rod. An emergency water outlet is provided on the inner bottom wall of the active cavity near the right side of the piston ring. The inside of the connecting pipe is provided with a transmission component that works with the guide component to open and close the emergency water outlet.

[0006] Preferably, the guide includes an inclined rod fixedly connected to the left end of the guide rod, and a movable wheel is provided at the bottom end of the inclined rod in contact with the inner bottom wall of the movable cavity. The left end of the connecting tube is detachably connected to a mounting plate, and a micro switch is provided on the side of the mounting plate near the movable cavity.

[0007] Preferably, the transmission component includes a slider that moves left and right on the bottom wall of the movable cavity near the mounting plate, and a connecting rod is sleeved on the outer wall of the bottom end of the slider. The other end of the connecting rod is fixedly connected to a sealing plate, wherein the sealing plate is located inside the emergency water outlet.

[0008] Preferably, an auxiliary spring is provided on the outer wall of the connecting rod near the sealing plate, the guide member controls the closing of the micro switch through the transmission member, an audible and visual alarm is fixedly connected to the left side of the display module, and the audible and visual alarm and the micro switch are connected in series through a battery to form a circuit.

[0009] Preferably, the bottom end of the connecting pipe is fixedly connected to an internally threaded cylinder, a screw is threadedly connected to the bottom of the internally threaded cylinder, and an installation hole is provided at the bottom of the screw.

[0010] Preferably, a retaining ring is fixedly connected to the outer wall of the left end of the guide rod.

[0011] This utility model has the following beneficial effects: This power plant boiler feedwater pump monitoring device enables real-time monitoring and buffer protection of the feedwater pump outlet pressure. By setting a movable chamber, a buffer spring, and a piston ring that can move left and right inside the connecting pipe, and cooperating with the water pressure sensor inside the piston ring, it can not only monitor the feedwater pressure in real time, but also use the movement of the piston ring to buffer the water flow impact, avoid damage to the sensor caused by sudden changes in water pressure, effectively extend the service life of the water pressure sensor, and solve the problem that traditional monitoring equipment is easily affected by unstable water flow impact. This power plant boiler feedwater pump monitoring device, when the water pressure is abnormal, the piston ring drives the guide rod and guide component to move, and controls the opening and closing of the emergency outlet through the transmission component, which can divert the overpressure water flow in time, avoid damage to the feedwater pump and subsequent boiler equipment caused by excessive water pressure, and improve the safety of system operation. This power plant boiler feedwater pump monitoring device, through the series connection of a micro switch, an audible and visual alarm, and a display module, can simultaneously activate the audible and visual alarm when the guide component touches the micro switch due to abnormal water pressure. With the cooperation of the display module, the device can be viewed, making it easier for staff to quickly know about the abnormal situation and take measures, thus improving the efficiency of fault response. Attached Figure Description

[0012] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2This is a schematic diagram of the disassembly structure of the connecting pipe and the main body of the water pump of this utility model; Figure 3 This is a schematic cross-sectional view of the butt joint of this utility model; Figure 4 This is a schematic diagram of the piston ring compression structure of this utility model; Figure 5 This is a schematic diagram of the structure of the conductive component of this utility model abutting against the miniature switch.

[0013] The components include: 1. Water pump body; 2. Connecting pipe; 3. Inclined pipe; 4. Moving chamber; 5. Piston ring; 6. Water pressure sensor; 7. Limiting ring; 8. Guide rod; 9. Guide component; 901. Tilt rod; 902. Moving wheel; 10. Emergency outlet; 11. Mounting plate; 12. Micro switch; 13. Connecting rod; 14. Sealing plate; 15. Auxiliary spring; 16. Audible and visual alarm; 17. Internal threaded cylinder; 18. Screw; 19. Retaining ring; 20. Slider; 21. Buffer spring. Detailed Implementation

[0014] 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.

[0015] Please see Figures 1 to 5 This utility model provides a monitoring device for a boiler feedwater pump in a power plant; it includes a feedwater pump body 1, and a monitoring mechanism is detachably connected to the outlet end of the feedwater pump body 1. The monitoring mechanism includes a connecting pipe 2, with an inclined pipe 3 on the top of the outer wall of the connecting pipe 2, which are interconnected. The outlet of the inclined pipe 3 is connected to the external power generation boiler equipment, and the inlet of the water pump body 1 is connected to the external water inlet pipe. A display module is provided on the left side of the inclined pipe 3, which includes, but is not limited to, a display screen, indicator light combination, control module, etc.

[0016] The buffer structure includes a movable cavity 4 inside the connecting pipe 2, a piston ring 5 that can move left and right inside the movable cavity 4 and communicates with the inclined pipe 3, a water pressure sensor 6 inside the piston ring 5, a limiting ring 7 on the inner wall of the movable cavity 4 away from the piston ring 5 on the left side, a guide rod 8 fixedly connected to the left side of the piston ring 5, a buffer spring 21 sleeved on the outer wall of the guide rod 8, and a guide member 9 passing through the limiting ring 7 at the other end of the guide rod 8. An emergency water outlet 10 is provided on the inner bottom wall of the active cavity 4, near the right side of the piston ring 5. The inside of the connecting pipe 2 is provided with a transmission component that works with the guide component 9 to open and close the emergency water outlet 10. The guide component 9 includes an inclined rod 901 fixedly connected to the left end of the guide rod 8. A moving wheel 902 is provided at the bottom end of the inclined rod 901, which is attached to the inner bottom wall of the active cavity 4. A mounting plate 11 is detachably connected to the left end of the connecting pipe 2. A micro switch 12 is provided on the side of the mounting plate 11 near the active cavity 4.

[0017] The transmission component includes a slider 20 that moves left and right on the bottom wall of the movable cavity 4 near the mounting plate 11. A connecting rod 13 is sleeved on the outer wall of the bottom end of the slider 20. A sealing plate 14 is fixedly connected to the other end of the connecting rod 13. The sealing plate 14 is located inside the emergency water outlet 10.

[0018] An auxiliary spring 15 is provided on the outer wall of the connecting rod 13 near the sealing plate 14. The guide 9 controls the closing of the micro switch 12 through the transmission component. An audible and visual alarm 16 is fixedly connected to the left side of the display module. The audible and visual alarm 16 and the micro switch 12 form a circuit through a battery.

[0019] The bottom end of the connecting pipe 2 is fixedly connected to an internally threaded cylinder 17, and a screw 18 is threadedly connected to the bottom of the internally threaded cylinder 17. A mounting hole is provided at the bottom of the screw 18, and a retaining ring 19 is fixedly connected to the outer wall of the left end of the guide rod 8. The equipment can be installed in a designated position through the mounting hole. By rotating the screw 18, the working height of the connecting pipe 2 can be adjusted, which is convenient to adjust according to the usage requirements, thereby maintaining the stability of use.

[0020] like Figure 3 As shown, piston ring 5 is in a state where no water flows through it. Figure 4 This diagram shows the inclined tube 3 and the connecting tube 2 in their fully open state, facilitating rapid water flow into the interior of the inclined tube 3. Figure 5 When the water flow reaches its limit, the micro switch 12 is triggered. When the piston ring 5 moves to the left, it simultaneously drives the guide rod 8 and the guide member 9 to move, and at the same time, the buffer spring 21 is compressed and deformed. When the water flow exceeds the limit, it abuts against the micro switch with the cooperation of the guide member 9 and the transmission member, thereby triggering the sound and light alarm 16 to work.

[0021] All electrical components mentioned in this article are connected to an external main controller and 220V AC mains power, and the main controller can be a conventional known device such as a computer that can control it.

[0022] In this invention, the working steps of the device are as follows: When in use, first connect the monitoring mechanism to the inlet end of the connecting pipe 2 and the outlet end of the water pump body 1 to ensure a leak-free seal; then connect the inclined pipe 3 at the top of the connecting pipe to the inlet end of the external power generation boiler equipment to complete the water flow path construction; finally, adjust the required height of the equipment by cooperating with the screw 18 through the internal threaded cylinder 17 at the bottom of the connecting pipe, and fix the device in the designated position using the mounting hole at the bottom of the screw to ensure structural stability during operation. Start the main body 1 of the water pump. External water is pressurized by the water pump and enters the connecting pipe 2. The water flow pushes the piston ring 5 to move slightly to the left along the movable chamber 4. The buffer spring 21 deforms synchronously to buffer the impact of the water flow. The water pressure sensor 6 in the piston ring collects water pressure data in real time and displays the real-time water pressure value and operating status through the display module. When the water pressure / flow rate of the water pump exceeds the limit, the water flow continuously pushes the piston ring 5 to the left, causing the guide rod 8 and guide component 9 to move synchronously. The moving wheel 902 slides smoothly against the bottom wall of the movable cavity. When the pressure reaches the limit value (corresponding to the "triggering micro switch state" in Figure 5), the guide component 9 pushes the slider 20 of the transmission component, which in turn drives the sealing plate 14 to disengage from the emergency outlet 10 through the connecting rod 13, realizing the diversion of overpressure water flow (emergency protection). At the same time, the guide component triggers the micro switch 12, the series circuit is connected, the audible and visual alarm 16 is activated, and the display module simultaneously prompts "overpressure fault". The staff needs to immediately check the data on the display module, adjust the operating parameters of the water pump, or stop the pump for maintenance.

[0023] 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 monitoring device for boiler feedwater pumps in power plants, characterized in that: Includes a water pump body (1), and a monitoring mechanism is detachably connected to the outlet end of the water pump body (1); The monitoring mechanism includes a connecting pipe (2), and an inclined pipe (3) is provided on the top of the outer wall of the connecting pipe (2), and they are interconnected. The outlet of the inclined pipe (3) is connected to the external power generation boiler equipment, and the inlet of the water pump body (1) is connected to the external water inlet pipe. A display module is provided on the left side of the inclined pipe (3). The buffer structure includes a movable cavity (4) inside the connecting pipe (2), a piston ring (5) that can move left and right in the movable cavity (4) and the inclined pipe (3), a water pressure sensor (6) inside the piston ring (5), a limiting ring (7) on the inner wall of the movable cavity (4) away from the piston ring (5), a guide rod (8) fixedly connected to the left side of the piston ring (5), a buffer spring (21) sleeved on the outer wall of the guide rod (8), and a guide member (9) passing through the limiting ring (7) at the other end of the guide rod (8). An emergency water outlet (10) is provided on the inner bottom wall of the active cavity (4) near the right side of the piston ring (5). The inside of the connecting pipe (2) is provided with a transmission component that works in conjunction with the guide component (9) to open and close the emergency water outlet (10).

2. The power plant boiler feedwater pump monitoring device according to claim 1, characterized in that: The guide (9) includes an inclined rod (901) fixedly connected to the left end of the guide rod (8), and a moving wheel (902) is provided at the bottom end of the inclined rod (901) in contact with the inner bottom wall of the movable cavity (4). The left end of the connecting pipe (2) is detachably connected to an installation plate (11), and a micro switch (12) is provided on the side of the installation plate (11) near the movable cavity (4).

3. The power plant boiler feedwater pump monitoring device according to claim 2, characterized in that: The transmission component includes a slider (20) that moves left and right on the bottom wall of the movable cavity (4) near the mounting plate (11). A connecting rod (13) is sleeved on the outer wall of the bottom end of the slider (20). A sealing plate (14) is fixedly connected to the other end of the connecting rod (13). The sealing plate (14) is located inside the emergency water outlet (10).

4. The power plant boiler feedwater pump monitoring device according to claim 3, characterized in that: An auxiliary spring (15) is provided on the outer wall of the connecting rod (13) near the sealing plate (14). The guide (9) controls the closing of the micro switch (12) through the transmission component. An audible and visual alarm (16) is fixedly connected to the left side of the display module. The audible and visual alarm (16) and the micro switch (12) are connected in series through a battery to form a circuit.

5. A monitoring device for a power plant boiler feedwater pump according to claim 4, characterized in that: The bottom end of the connecting pipe (2) is fixedly connected to an internal threaded cylinder (17), and a screw (18) is threadedly connected to the bottom of the internal threaded cylinder (17). An installation hole is provided at the bottom of the screw (18).

6. The power plant boiler feedwater pump monitoring device according to claim 5, characterized in that: A retaining ring (19) is fixedly connected to the outer wall of the left end of the guide rod (8).

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