Anti-frost-crack emptying device for water supply pipeline of power plant

Abstract

The utility model provides a power plant water supply pipeline anti-frost-crack emptying device which is characterized in that a two-position three-way electromagnetic valve and an emptying module are respectively arranged at two ends of a target water supply pipeline, a stop valve is sequentially controlled to be closed through a transmission link, and the two-position three-way electromagnetic valve is controlled to communicate a first port with a third port; the air pump is controlled to introduce the air exhaust body into the target water supply pipeline through the three-way pipe, it can be ensured that the target water supply pipeline, the water supply end and the water using end are both switched off, high-pressure air is injected after air is communicated, and damage to the system caused by mistaken starting of the air pump can be avoided. According to the anti-frost-crack emptying device for the power plant water supply pipeline, effective emptying of the target water supply pipeline which is arranged in a bent mode can be automatically achieved, residues of the valley section of the pipeline are avoided, the anti-freezing effect is guaranteed, control actions of all the components are sequentially conducted, damage to a system caused by misoperation can be avoided, and the anti-frost-crack emptying device is safe and effective.

Description

A device for preventing freezing and cracking of water supply pipelines in power plants. Technical Field

[0001] This utility model relates to the field of water pipe antifreeze technology, and in particular to a device for preventing freezing and cracking of power plant water supply pipelines. Background Technology

[0002] Power plant generating units continuously generate heat during operation. To prevent heat accumulation from damaging the generator units, a cooling system is often required, with water cooling being a commonly used method.

[0003] The water cooling system operates intermittently. In extremely cold environments, when the system is shut down, the water flow stops, making it prone to freezing. The expansion of frozen water can damage the water supply pipes. Furthermore, the water supply will also stop during system maintenance. To prevent the water supply pipes from freezing and cracking, residual water must be drained from the pipes promptly when the water supply is interrupted.

[0004] In existing technologies, a drain valve is often installed at the lowest point of the pipeline. When drainage is needed, the drain valve is opened, and the water in the pipeline can flow out naturally. However, in practical applications, water supply pipelines often need to be designed with bends due to space constraints, resulting in a large number of U-shaped sections. To drain the residual water in these sections, a drain valve needs to be installed at each U-shaped section. When drainage is needed, a large number of drain valves need to be opened, making the operation cumbersome. Summary of the Invention

[0005] Based on this, the purpose of this utility model is to provide a device for preventing freezing and cracking of water supply pipelines in power plants and to solve the problem that the existing technology requires a large number of drain valves to drain water supply pipelines with many bends, resulting in complicated draining operations.

[0006] This utility model provides a device for preventing freezing and cracking of water supply pipelines in power plants and for draining air from them, including:

[0007] A two-position three-way solenoid valve is installed at the first end of the curved target water supply pipeline. The first port of the two-position three-way solenoid valve is connected to the target water supply pipeline, the second port is connected to an external pipeline, and the third port is open.

[0008] A venting module is installed at the second end of the target water supply pipeline. The venting module includes a tee pipe, a shut-off valve, an air pump, and control components.

[0009] The tee pipe connects the target water supply pipeline, the shut-off valve, and the output port of the air pump;

[0010] The control component includes a shut-off valve controller, a two-position three-way solenoid valve controller, and an air pump controller for controlling the shut-off valve, the two-position three-way solenoid valve, and the air pump, respectively, as well as an electric slider assembly and a transmission link formed by the sliding of the slider in the electric slider assembly. The shut-off valve controller, the two-position three-way solenoid valve controller, and the air pump controller are sequentially arranged on the transmission link so that when the slider of the electric slider assembly is triggered to move, the shut-off valve is sequentially controlled to close, the two-position three-way solenoid valve is controlled to connect the first port and the third port, and the air pump is controlled to introduce exhaust gas into the target water supply pipeline through the three-way pipe.

[0011] Optionally, the shut-off valve includes a ball valve, the slider of the electric slider assembly is provided with a first rack, and the shut-off valve controller includes a first gear coaxially and fixedly connected to the control rod of the ball valve. The first gear meshes with the first rack and is arranged on the forward path of the first rack.

[0012] Optionally, it also includes a protective housing, wherein the control components are disposed within the protective housing, wherein,

[0013] Both the two-position three-way solenoid valve controller and the air pump controller include a push-button controller.

[0014] The slider of the electric slider assembly is further provided with a second rack, which is arranged side by side and spaced apart from the first rack;

[0015] The control component also includes a rotating shaft, on which a second gear, a first cam, and a second cam are fixedly mounted. The second gear meshes with and matches the second rack. The second gear is positioned on the forward path of the second rack. The first cam and the second cam are respectively aligned with the button positions of the two-position three-way solenoid valve controller and the air pump controller.

[0016] Optionally, the length of the second rack is greater than the length of the first rack, the second gear and the first gear are spaced apart in the direction of movement of the slider, and the second gear is located downstream of the movement path of the slider.

[0017] Optionally, the cam directions of the first cam and the second cam are spaced apart in the circumferential direction.

[0018] Optionally, both the first cam and the second cam are double-ended cams, and their projections on the horizontal plane are orthogonal.

[0019] Optionally, a water supply valve is also provided on the external pipe, and the slider is also connected to the water supply valve for control.

[0020] This utility model provides a power plant water supply pipeline anti-freezing and venting device. A two-position three-way solenoid valve and a venting module are respectively installed at both ends of the target water supply pipeline. When venting is required, the external pipeline is closed, the two-position three-way solenoid valve connects the first port to the third port, the venting module closes the second end of the target water supply pipeline, and the air pump is activated to inject high-pressure gas into the target water supply pipeline. This effectively removes residual water from the target water supply pipeline through the third port of the two-position three-way solenoid valve, preventing residual water from remaining in the curved target water supply pipeline and avoiding damage to the water pipe after freezing. The transmission link sequentially controls the closure of the shut-off valve, controls the two-position three-way solenoid valve to connect the first and third ports, and controls the air pump to introduce venting gas into the target water supply pipeline through the three-way pipe. This ensures that the target water supply pipeline is shut off from both the water supply and water usage ends, and that high-pressure air is injected only after air has been introduced, preventing damage to the system caused by accidental activation of the air pump. Attached Figure Description

[0021] Figure 1 is a schematic diagram of the installation of the antifreeze and crack drainage device for the power plant water supply pipeline in an embodiment of this utility model.

[0022] Figure 2 is a schematic diagram of the main structure of the antifreeze and anti-crack drainage device for power plant water supply pipelines in this embodiment of the present invention.

[0023] The following detailed description, in conjunction with the accompanying drawings, will further illustrate this utility model. Detailed Implementation

[0024] To facilitate understanding of this utility model, a more complete description will be given below with reference to the accompanying drawings. Several embodiments of this utility model are shown in the drawings. However, this utility model can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that the disclosure of this utility model will be more thorough and complete.

[0025] It should be noted that when a component is said to be "fixed to" another component, it can be directly on the other component or there may be an intervening component. When a component is said to be "connected to" another component, it can be directly connected to the other component or there may be an intervening component. The terms "vertical," "horizontal," "left," "right," and similar expressions used in this document are for illustrative purposes only.

[0026] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0027] To address the problem of cumbersome venting operations caused by the need for numerous venting valves in existing technologies for venting water supply pipelines with many bends, this invention provides a venting device for preventing freezing and cracking in power plant water supply pipelines. It features a two-position three-way solenoid valve and a venting module at both ends of the target water supply pipeline. A transmission link sequentially controls the closure of the shut-off valve, connects the first port to the third port of the two-position three-way solenoid valve, and controls the air pump to introduce venting air into the target water supply pipeline through the three-way pipe. This ensures that both the target water supply pipeline and the water supply and water usage ends are shut off. Furthermore, the injection of high-pressure air after the air connection prevents damage to the system from accidental activation of the air pump. This device can automatically and effectively vent bend-arranged target water supply pipelines, preventing residue in low-lying sections of the pipeline, ensuring antifreeze performance, and the sequential control of each component prevents damage to the system from misoperation, making it safe and effective.

[0028] Specifically, referring to Figures 1 and 2, the antifreeze and venting device for power plant water supply pipelines in this embodiment is mainly applied to water supply pipelines 100 with curved arrangements. The water supply pipeline 100 has multiple low points, and when venting, it can be vented all at once by injecting high-pressure gas.

[0029] At the first end of the water supply pipe 100, a two-position three-way solenoid valve 200 is installed. The first port of the two-position three-way solenoid valve 200 is connected to the water supply pipe 100, the second port is connected to an external pipe through a water supply valve 110, and the third port is open. The two-position three-way solenoid valve 200 has two states: the first port is connected to the second port, and the first port is connected to the third port. When the first port of the two-position three-way solenoid valve 200 is connected to the second port, the water supply pipe 100 receives external water supply through the water supply valve 110; when the first port of the two-position three-way solenoid valve 200 is connected to the third port, the water supply pipe 100 can drain water through the third port.

[0030] The second end of the water supply pipe 100 is provided with an emptying module 300. The emptying module 300 includes a three-way pipe 320, a shut-off valve 330, an air pump 370 and a control component. The three-way pipe 320 is connected to the output ports of the water supply pipe 100, the shut-off valve 330 and the air pump 370, and the shut-off valve 330 is connected to the water-using end.

[0031] When the shut-off valve 330 is closed and the first port of the two-position three-way solenoid valve 200 is connected to the third port, the air pump 370 is turned on. The high-pressure gas output by the air pump 370 is injected into the water supply pipe 100 through the three-way pipe 320 from the second end of the water supply pipe 100, so that the water in the water supply pipe 100 can be discharged from the third port of the two-position three-way solenoid valve 200.

[0032] To ensure the reliability of air supply and venting in the water supply pipeline 100, the control components include a shut-off valve controller, a two-position three-way solenoid valve controller, and an air pump controller, all for controlling the shut-off valve 330, the two-position three-way solenoid valve 200, and the air pump 370, respectively. The components also include an electric slider assembly (including an electric slide rail and a slider 340) and a transmission link formed by the sliding of the slider 340. The shut-off valve controller, the two-position three-way solenoid valve controller, and the air pump controller 362 are sequentially mounted on the transmission link. When the slider 340 is triggered, the shut-off valve 330 is closed, the two-position three-way solenoid valve 200 connects its first and third ports, and the air pump 370 introduces venting gas into the water supply pipeline 100 through the three-way pipe 320.

[0033] Specifically, the shut-off valve 330 includes a ball valve, a first rack 341 is provided on the slider 340, and the shut-off valve controller includes a first gear 331 that is coaxially fixedly connected to the control rod of the ball valve 330. The first gear 331 meshes with the first rack 341 and is located on the forward path of the first rack 341. When the slider 340 slides toward the first gear 331, the first rack 341 can drive the first gear 331 to rotate, thereby controlling the shut-off valve 330 to close.

[0034] To facilitate the installation of the control components, this embodiment also includes a protective housing 310, and the control components are disposed inside the protective housing 310.

[0035] To trigger the two-position three-way solenoid valve controller 361 and the air pump controller 362, both the two-position three-way solenoid valve controller 361 and the air pump controller 362 include a button controller; a second rack 342 is also provided on the slider 340, and the second rack 342 is arranged side by side with the first rack 341 at intervals; the control component also includes a rotating shaft, which is movably disposed in the protective housing 310, and a second gear 351, a first cam 352 and a second cam 353 are fixedly disposed on the rotating shaft, the second gear 351 meshes with the second rack 342, the second gear 351 is disposed on the forward path of the second rack 342, and the first cam 352 and the second cam 353 are respectively aligned with the button positions of the two-position three-way solenoid valve controller 361 and the air pump controller 362.

[0036] As the slider 340 slides, the second rack 342 meshes with the second gear 351 and drives the second gear 351 to rotate. The second gear 351 drives the rotating shaft and the first cam 352 and the second cam 353 on the rotating shaft to rotate. The buttons of the two-position three-way solenoid valve controller 361 and the air pump controller 362 are triggered by the first cam 352 and the second cam 353.

[0037] The triggering action of the button controller can be flexibly set. For example, the two-position three-way solenoid valve controller 361 is set to trigger when the button is released, and the air pump controller 362 is set to trigger when the button is pressed. In the initial state, the protrusion of the first cam 352 is pressed against the button of the two-position three-way solenoid valve controller 361, and the protrusion of the second cam 353 is offset from the button of the air pump controller 362. After the second gear 351 rotates, the protrusion of the first cam 352 moves away, and the two-position three-way solenoid valve controller 361 is triggered. It prioritizes controlling the two-position three-way solenoid valve 200 to switch to the first port to connect to the third port. As the second gear 351 continues to rotate, the protrusion of the second cam 353 moves to the button position of the air pump controller 362. The button of the air pump controller 362 can be pressed to trigger the air pump controller 362 and control the air pump 370 to output high-pressure gas.

[0038] To ensure that the shut-off valve 330 closes first, in this embodiment, the length of the second rack 342 is greater than the length of the first rack 341. The second gear 351 and the first gear 331 are spaced apart in the direction of movement of the slider 340, and the second gear 351 is located downstream of the movement path of the slider 340. This allows the first rack 341 to disengage from the first gear 331 after the first rack 341 closes the shut-off valve 330, and then the second rack 342 engages with the second gear 351. The fact that the first rack 341 disengages from the first gear 331 after closing the shut-off valve 330 prevents over-operation of the shut-off valve 330, ensuring that the shut-off valve 330 remains stably closed.

[0039] In this embodiment, the two-position three-way solenoid valve controller 361 and the air pump controller 362 are arranged in the same vertical position. The cam directions of the first cam 352 and the second cam 353 are spaced apart in the circumferential direction so that when the first cam 352 and the second cam 353 rotate synchronously, the two-position three-way solenoid valve controller 361 and the air pump controller 362 can be triggered sequentially.

[0040] For ease of installation, in this embodiment, both the first cam 352 and the second cam 353 are double-ended cams, and their projections on the horizontal plane are orthogonal. Furthermore, both ends of the double-ended cams can trigger a push-button switch; if one end fails, the other end can still function normally, thus improving system fault tolerance.

[0041] To further enhance control convenience, slider 340 is also connected to water supply valve 110, so that when water supply valve 110 is closed, slider 340 can be automatically controlled to automatically control the drainage of water supply pipe 100.

[0042] The industrial computer 301 can be installed inside the protective housing 310. The protective housing 310 is provided with wiring holes for cable routing. The industrial computer 301 is used to control the water supply valve 110 to the slider 340, the two-position three-way solenoid valve controller 361 to the two-position three-way solenoid valve 200, and the air pump controller 362 to the air pump 370.

[0043] This utility model provides a power plant water supply pipeline anti-freezing and venting device. Two-position three-way solenoid valves and venting modules are respectively installed at both ends of the target water supply pipeline. Through a transmission link, the shut-off valves are sequentially controlled to close, and the two-position three-way solenoid valves are controlled to connect the first port and the third port. The air pump is controlled to introduce venting air into the target water supply pipeline through the three-way pipe. This ensures that the target water supply pipeline is shut off from both the supply and usage ends. Furthermore, the air is introduced only after connection to the pipeline, preventing damage to the system from accidental activation of the air pump. This utility model's power plant water supply pipeline anti-freezing and venting device can automatically and effectively vent curved target water supply pipelines, avoiding residue in low-lying sections of the pipeline and ensuring anti-freezing effect. The sequential control actions of each component prevent damage to the system from misoperation, making it safe and effective.

[0044] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0045] The embodiments described above are merely illustrative of several specific implementations of this utility model, and while the descriptions are detailed, they should not be construed as limiting the scope of protection of this utility model. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these modifications and improvements all fall within the scope of protection of this utility model. Therefore, the scope of protection of this utility model patent should be determined by the appended claims.

Claims

1. A device for preventing freezing and cracking of water supply pipelines in power plants, characterized in that, include: A two-position three-way solenoid valve is installed at the first end of a curved target water supply pipeline. The first port of the two-position three-way solenoid valve is connected to the target water supply pipeline, the second port is connected to an external pipeline, and the third port is open. A venting module is installed at the second end of the target water supply pipeline. The venting module includes a three-way pipe, a shut-off valve, an air pump, and a control component. The three-way pipe connects the output ports of the target water supply pipeline, the shut-off valve, and the air pump. The control component includes a shut-off valve controller, a two-position three-way solenoid valve controller, and an air pump controller for controlling the shut-off valve, the two-position three-way solenoid valve, and the air pump, respectively. It also includes an electric slider assembly and a transmission link formed by the sliding of the slider in the electric slider assembly. The shut-off valve controller, the two-position three-way solenoid valve controller, and the air pump controller are sequentially installed on the transmission link so that when the electric slider assembly is triggered, it sequentially controls the shut-off valve to close, controls the two-position three-way solenoid valve to connect the first port and the third port, and controls the air pump to introduce venting gas into the target water supply pipeline through the three-way pipe.

2. The antifreeze and anti-crack drainage device for power plant water supply pipelines according to claim 1, characterized in that, The shut-off valve includes a ball valve, the slider of the electric slider assembly is provided with a first rack, and the shut-off valve controller includes a first gear that is coaxially and fixedly connected to the control rod of the ball valve. The first gear meshes with the first rack and is arranged on the forward path of the first rack.

3. The antifreeze and anti-crack drainage device for power plant water supply pipelines according to claim 2, characterized in that, It also includes a protective housing, and the control components are disposed within the protective housing. Both the two-position three-way solenoid valve controller and the air pump controller include button controllers. The slider of the electric slider assembly is further provided with a second rack, which is arranged parallel to and spaced apart from the first rack. The control components also include a rotating shaft, on which a second gear, a first cam, and a second cam are fixedly disposed. The second gear meshes with the second rack and is disposed on the forward path of the second rack. The first cam and the second cam are respectively aligned with the button positions of the two-position three-way solenoid valve controller and the air pump controller.

4. The antifreeze and anti-crack drainage device for power plant water supply pipelines according to claim 3, characterized in that, The length of the second rack is greater than the length of the first rack. The second gear and the first gear are spaced apart in the direction of movement of the slider, and the second gear is located downstream of the movement path of the slider.

5. The antifreeze and anti-crack drainage device for power plant water supply pipelines according to claim 3, characterized in that, The cam directions of the first cam and the second cam are spaced apart in the circumferential direction.

6. The antifreeze and anti-crack drainage device for power plant water supply pipelines according to claim 5, characterized in that, Both the first cam and the second cam are double-ended cams, and their projections on the horizontal plane are orthogonal.

7. The antifreeze and anti-crack drainage device for power plant water supply pipelines according to claim 1, characterized in that, The external pipe is also equipped with a water supply valve, and the electric slider assembly is also connected to the water supply valve for control.

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