Anti-blocking device for drain loop of surge tank
By adding parallel drainage pipes and high-level connections to the drainage pipes of the equalizing box, the problem of poor drainage caused by blockage of the throttling component was solved, achieving smooth drainage and improved safety, thus avoiding safety accidents.
Patent Information
- Application Number
- CN202520140195.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-21
- Publication Date
- 2025-12-02
- Estimated Expiration
- 2035-01-21
AI Technical Summary
In existing technologies, the drainage pipes of the equalizing chamber are prone to blockage, resulting in poor drainage, which affects the temperature control and safety of the equalizing chamber, and may even cause extreme cooling of the cylinder, leading to a major safety accident.
Two additional drainage pipes were added to the existing equalizing tank drainage pipes. One of them was connected in parallel with the throttling component for switching purposes, and the other was connected to the liquid level above the condenser to reduce the impact of hydrostatic pressure on drainage and ensure smooth drainage.
It effectively avoids clogging of the throttling components, ensures smooth drainage, reduces drainage resistance, prevents water from entering the turbine, and improves safety and start-up efficiency.
Smart Images
Figure CN223621652U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of equalizing box drainage technology, and in particular to an anti-clogging device for the drainage circuit of an equalizing box. Background Technology
[0002] In the existing technology, the drain pipe at the bottom of the equalizing tank of the power generation normally drains water to the hot well of the condenser. The connection point with the condenser is located below the normal liquid level of the condenser, which makes there a certain resistance when draining water from the equalizing tank.
[0003] In addition, the diameter of the drainage pipe of the equalizing tank is generally DN25, and a throttling orifice plate is installed before the primary valve. When the throttling orifice plate is blocked, it is easy to cause poor drainage of the equalizing tank, which will lead to water accumulation in the equalizing tank. This makes it difficult to control the temperature of the equalizing tank, affecting the turbine start-up time. Furthermore, poor drainage can cause water to enter the turbine, causing extreme cooling of the cylinder and resulting in a major safety accident. Utility Model Content
[0004] The purpose of this invention is to provide an anti-clogging device for the drainage circuit of an equalizing box, which solves the problem of easy clogging of the drainage pipe of the equalizing box in the prior art.
[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows:
[0006] This utility model provides a device for preventing blockage in the drainage circuit of an equalizing tank, comprising:
[0007] Equalizing chamber;
[0008] A condenser, wherein the condenser is connected to the equalizing tank via a first drain pipe;
[0009] A throttling component is disposed on the first drainage pipe;
[0010] The second drainage pipe is connected in parallel with the throttling component;
[0011] The third drainage pipe has one end connected to the first drainage pipe and the other end connected to the condenser.
[0012] Furthermore, a first vacuum shut-off valve is installed on the first drainage pipe.
[0013] Furthermore, a second vacuum shut-off valve is installed on the second drainage pipe.
[0014] Furthermore, the third drainage pipe is connected to the liquid surface above the condenser.
[0015] Furthermore, a third vacuum shut-off valve is provided at the end of the third drain pipe near the equalizing box, and a fourth vacuum shut-off valve is provided at the end of the third drain pipe near the condenser.
[0016] Furthermore, a hot well is connected to the lower end of the condenser, and the hot well is connected to the equalizing box through the first drain pipe.
[0017] Furthermore, the hot well is connected to the second drainage pipe.
[0018] Due to the application of the above technical solution, this utility model has the following advantages compared with the prior art:
[0019] This utility model discloses an anti-clogging device for the drainage loop of a pressure equalization box. It adds two drainage pipes to the existing drainage pipe system. One drainage pipe is connected in parallel with a throttling component installed on the original drainage pipe, thus enabling timely pipe switching in case of blockage during throttling component operation and ensuring smooth drainage. The other newly added drainage pipe connects one end to the original drainage pipe and the other end to the area above the condenser liquid level, thereby increasing the connection height between the drainage pipe and the condenser and resolving the impact of static water pressure within the condenser on drainage. Attached Figure Description
[0020] The following sections will describe some specific embodiments of the present invention in a detailed manner by way of example and not limitation, with reference to the accompanying drawings. The same reference numerals in the drawings denote the same or similar parts or components. Those skilled in the art should understand that these drawings are not necessarily drawn to scale. In the drawings:
[0021] Figure 1 This is a plan view of a pressure equalization box drainage circuit anti-clogging device provided by this utility model;
[0022] Figure 2 This is a diagram of the improved part of the anti-clogging device for the drainage circuit of the equalizing box provided by this utility model (the dotted line part is the improved part).
[0023] Figure 3 This is a schematic diagram of the condenser structure in the anti-clogging device for the drainage circuit of the equalizing box provided by this utility model;
[0024] The reference numerals in the attached figures are explained as follows:
[0025] 1. Equalizing tank; 2. Condenser; 3. First drain pipe; 301. First vacuum shut-off valve; 4. Throttling assembly; 5. Second drain pipe; 501. Second vacuum shut-off valve; 6. Third drain pipe; 601. Third vacuum shut-off valve; 602. Fourth vacuum shut-off valve; 7. Hot well. Detailed Implementation
[0026] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.
[0027] See Figures 1 to 3 The anti-clogging device for the equalizing tank drainage circuit disclosed in this utility model includes an equalizing tank 1, a condenser 2, a first drainage pipe 3, a throttling component 4, a second drainage pipe 5, and a third drainage pipe 6.
[0028] Specifically, the aforementioned equalizing tank 1 is designed for the steam seal, and its main function is to collect, distribute, and equalize steam pressure to balance the pressure within the system. The aforementioned condenser 2 is connected to the equalizing tank 1 via the first drain pipe 3. The main function of the condenser 2 is to cool the steam into water and recover latent heat, thereby improving the system's vacuum level and thermal efficiency.
[0029] In this embodiment of the present invention, a first vacuum shut-off valve 301 is provided on the first drainage pipe 3 to control the flow of water through the first drainage pipe 3.
[0030] Furthermore, in this embodiment of the invention, a throttling component 4 is provided on the aforementioned first drainage pipe 3. The throttling component 4 can adjust the drainage flow rate to meet the specific needs of the system and prevent excessive or insufficient drainage. Moreover, by limiting the flow cross-section of the throttling component 4, the pressure inside the pipe can be reduced, thereby protecting downstream equipment and preventing damage due to excessive pressure.
[0031] In some cases, the throttling component 4 can reduce the risk of cavitation by decreasing the fluid velocity, thereby preventing water hammer caused by sudden fluid stoppage or reverse flow and protecting the safety of pipelines and equipment.
[0032] In this embodiment of the invention, a second drain pipe 5 is also provided. The second drain pipe 5 is connected in parallel with the aforementioned throttling component 4, that is, one end of the second drain pipe 5 is connected upstream of the throttling component 4, and the other end of the second drain pipe 5 is connected downstream of the throttling component 4. When the throttling component 4 malfunctions or becomes internally blocked, the throttling component 4 can be disconnected, and the drained water can be introduced into the second drain pipe 5 and discharged to the condenser 2 to achieve smooth draining operation. A second vacuum shut-off valve 501 is synchronously provided on the second drain pipe 5 to control the start and stop of draining on the second drain pipe 5. The provision of the second drain pipe 5 provides a switching guarantee for the first drain pipe 3.
[0033] In this embodiment of the present invention, a third drain pipe 6 is also provided. One end of the third drain pipe 6 is connected to the first drain pipe 3, and the other end of the third drain pipe 6 is connected to the aforementioned condenser 2. That is, the third drain pipe 6 and the first drain pipe 3 are connected in parallel.
[0034] The reason for setting up the third drainage pipe 6 is that the lower end of the aforementioned condenser 2 is connected to the hot well 7. In fact, the aforementioned equalizer 1 is connected to the hot well 7 below the condenser 2 through the first drainage pipe 3. However, since the connection between the first drainage pipe 3 and the hot well 7 is located at the lower part of the liquid level inside the condenser 2, the hydrostatic pressure inside the condenser 2 will bring drainage resistance to the equalizer 1. Therefore, in this embodiment of the invention, a third drainage route is set up, connecting the third drainage pipe 6 directly to the liquid level above the condenser 2, thereby reducing the drainage resistance at the connection with the condenser 2.
[0035] In addition, in this embodiment of the present invention, a third vacuum shut-off valve 601 is provided at the end of the aforementioned third drain pipe 6 near the aforementioned equalizing box 1, and a fourth vacuum shut-off valve 602 is provided at the end near the aforementioned condenser 2. By providing the third vacuum shut-off valve 601 and the fourth vacuum shut-off valve 602, the start and stop of draining on the third drain pipe 6 are controlled.
[0036] The third vacuum shut-off valve 601 is installed to stop or open the drainage at the pipe port of the third drainage pipe 6, preventing any impact on the drainage operation when the first drainage pipe 3 or the second drainage pipe 5 is in use. The fourth vacuum shut-off valve 602 is installed at the end of the third drainage pipe 6 to prevent backflow of condensate entering the condenser 2 into the third drainage pipe 6 when it is not in use, thus avoiding disruption to normal drainage operations.
[0037] In summary, the anti-clogging device for the condensate drain circuit of the equalizing tank disclosed in this utility model adds two condensate drain lines to the original equalizing tank condensate drain line. One condensate drain line is connected in parallel with the throttling component installed on the original condensate drain line, so that if the throttling component becomes blocked during operation, the pipeline can be switched in time to ensure smooth condensation. The other newly added condensate drain line is connected at one end to the original condensate drain line and at the other end to the liquid level above the condenser, which increases the connection height between the condensate drain line and the condenser, thus solving the problem of the static water pressure in the condenser affecting condensation.
[0038] The above embodiments are only for illustrating the technical concept and features of this utility model. Their purpose is to enable those skilled in the art to understand the content of this utility model and implement it accordingly. They should not be used to limit the protection scope of this utility model. All equivalent changes or modifications made in accordance with the spirit and essence of this utility model should be included within the protection scope of this utility model.
Claims
1. A device for preventing blockage in the drainage circuit of an equalizing tank, characterized in that, include: Equalizing chamber (1); Condenser (2), which is connected to the equalizing tank (1) through a first drain pipe (3); A throttling component (4) is disposed on the first drainage pipe (3); The second drainage pipe (5) is connected in parallel with the throttling component (4); The third drainage pipe (6) has one end connected to the first drainage pipe (3) and the other end connected to the condenser (2).
2. The anti-clogging device for the drainage circuit of the equalizing tank according to claim 1, characterized in that, The first drainage pipe (3) is equipped with a first vacuum shut-off valve (301).
3. The anti-clogging device for the drainage circuit of the equalizing tank according to claim 1, characterized in that, A second vacuum shut-off valve (501) is installed on the second drainage pipe (5).
4. The anti-clogging device for the drainage circuit of the equalizing tank according to claim 1, characterized in that, The third drainage pipe (6) is connected to the liquid surface above the condenser (2).
5. The anti-clogging device for the drainage circuit of the equalizing tank according to claim 4, characterized in that, A third vacuum shut-off valve (601) is provided at one end of the third drain pipe (6) near the equalizing box (1), and a fourth vacuum shut-off valve (602) is provided at one end of the third drain pipe (6) near the condenser (2).
6. The anti-clogging device for the drainage circuit of the equalizing tank according to claim 1, characterized in that, The lower end of the condenser (2) is connected to a hot well (7), and the hot well (7) is connected to the equalizing box (1) through the first drainage pipe (3).
7. The anti-clogging device for the drainage circuit of the equalizing tank according to claim 6, characterized in that, The hot well (7) is connected to the second drainage pipe (5).