Automatic drainage device of generator hydrogen dryer
By improving the float support structure and sealing design, the problem of the float failing to float due to corrosion of the float lever bracket was solved, realizing automatic water drainage of the generator hydrogen dryer, ensuring the stability of hydrogen purity and pressure, and improving the reliability and safety of the device.
Patent Information
- Application Number
- CN202520276509.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-20
- Publication Date
- 2026-03-20
- Estimated Expiration
- 2035-02-20
AI Technical Summary
The float lever support in the existing generator hydrogen dryer is prone to corrosion, which prevents the float from rising and prevents water from draining out of the hydrogen dryer, posing a risk of hydrogen leakage.
The system employs a float barrel, float, and float valve stem assembly, modifying the float's support structure. The float floats with the liquid level, driving the valve stem to move. Combined with the sealing design of the inverted conical valve core and cylindrical valve seat, it ensures the correct fit between the valve core and valve seat, achieving automatic drainage.
This technology enables the smooth discharge of water from the hydrogen dryer, improves the stability and sealing of the device, prevents hydrogen leakage, ensures the purity and pressure of hydrogen, and enhances the reliability and safety of the device.
Smart Images
Figure CN224018160U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of hydrogen dryer technology, and more particularly to an automatic hydrophobic device for a generator hydrogen dryer. Background Technology
[0002] Currently, most coal-fired power plant generators use a water-hydrogen-hydrogen cooling system. The stator windings are water-cooled, the rotor windings are internally cooled with hydrogen, and the stator core is externally cooled with hydrogen. The generator has very high requirements for hydrogen quality. To ensure the hydrogen humidity meets the requirements, each generator is equipped with a hydrogen dryer. The wet vapor generated during the hydrogen drying process is condensed in a condenser and discharged from the system through a steam trap. Existing technology uses float-type steam traps, such as... Figure 1 As shown, its outer shell is elliptical, with the water inlet located at the top and the water outlet at the side. A drain valve is installed inside the shell and connected to the water outlet. A float is positioned inside the steam trap and fixed by a lever bracket that can move up and down. The other end of the lever bracket is connected to the drain valve. The float rises with the internal water level, opening the drain valve through the lever bracket to discharge water. When there is no water, the drain valve closes to seal the water outlet. However, during operation, the float often fails to rise due to jamming of the lever bracket, preventing water from draining from the hydrogen dryer. Utility Model Content
[0003] To address the aforementioned problems, this application provides an automatic water-draining device for a generator hydrogen dryer. This solves the problem of the float lever support structure failing to float due to corrosion.
[0004] To achieve the objectives of this application, the following technical solution is provided:
[0005] This application provides an automatic water-draining device for a generator hydrogen dryer, including a float barrel, a float, and a float valve stem assembly;
[0006] The float tank is cylindrical, with a lid fixed at the top and a base fixed at the bottom. A drain valve is provided on the side opening. A water inlet valve is provided on the lid. The float is located in the upper part of the float tank. The float is hollow inside and has an internal thread at its bottom that is fixedly connected to the float valve stem assembly. The float can float up and down with the change of liquid level in the float tank.
[0007] The float ball valve rod assembly comprises a valve rod, a valve seat and a valve rod support; both ends of the valve rod are provided with external threads, one end of which is connected with the float ball, and the other end is connected with the valve rod support; a valve core is fixedly connected to the outer side of the middle of the valve rod; the valve core is sealingly connected with the valve seat; the valve rod support is in the shape of a disc, and is provided with internal threads on it, which are matched with the external threads of the valve rod; the bottom of the float ball barrel body is provided with a baffle, which is fixedly connected with the float ball barrel body and forms a cavity between the baffle and the barrel body base, the valve rod support is arranged in the cavity, and a circular hole is arranged in the center of the baffle to allow the valve rod to pass through.
[0008] In a possible implementation, the valve core is in the shape of an inverted cone; the valve seat is a cylinder, which is concentric with the valve rod; and a groove in the shape of an inverted cone is arranged in the center of the valve seat to match the valve core.
[0009] In a possible implementation, the side of the float ball barrel body is further provided with a water drain valve, which is used for manually draining water.
[0010] In a possible implementation, the water drain valve is arranged higher than the water trap valve.
[0011] In a possible implementation, the side of the float ball barrel body is further provided with a liquid level measuring device, which is used for measuring the liquid level of the water trap device; the liquid level measuring device is fixedly connected with the float ball barrel body through a pipeline.
[0012] In a possible implementation, a sealing gasket is arranged between the barrel body base and the float ball barrel body.
[0013] In a possible implementation, the water inlet valve and the water trap valve are both stainless steel ball valves, and are both connected with the float ball barrel body through pipelines, and the water inlet valve and the water trap valve are both in an open state.
[0014] In a possible implementation, the float ball is made of polypropylene.
[0015] The automatic water drain device of the hydrogen dryer of the generator provided in the application forms a complete automatic water drain device structure framework, changes the float ball support structure, and the float ball can drive the valve rod to move with the liquid level, thereby solving the problem that the float ball cannot float up due to corrosion of the lever support structure. The structural design of the float ball barrel body ensures the stability and sealing performance of the device, and facilitates installation and maintenance. The connection mode of the valve rod and the valve rod support and the arrangement of the baffle limit the movement range of the valve rod, and ensure the correct cooperation of the valve core and the valve seat. In the water drain device, the cooperation of the float ball, the valve rod and the valve seat and other components achieves good sealing effect. When the drain valve is closed, hydrogen leakage can be effectively prevented, and the hydrogen pressure and purity in the hydrogen dryer can be ensured. BRIEF DESCRIPTION OF DRAWINGS
[0016] The accompanying drawings are included to provide a further understanding of the present application, and are incorporated in and constitute a part of the specification, illustrate embodiments of the present application and are used to explain the present application, but are not used to limit the present application.
[0017] Figure 1 A simple structure schematic diagram of an elliptical hydrophobe in the prior art provided for the present application;
[0018] Figure 2 A structure schematic diagram of an automatic hydrophobic device provided for the embodiments of the present application.
[0019] In the figure, 1, a housing; 2, a water inlet; 3, a water outlet; 4, a drain valve; 6, a lever support; 7, a float ball barrel body; 71, a barrel cover; 72, a barrel body base; 73, a water inlet valve; 74, a hydrophobic valve; 75, a drain valve; 76, a liquid level measuring device; 77, a sealing gasket; 8, a float ball; 9, a valve stem; 91, a valve core; 10, a valve seat; 11, a valve stem support; 12, a baffle; 13, a fixing bolt. DETAILED DESCRIPTION
[0020] In order to make the purpose, technical scheme and advantages of the present application more clear, the technical scheme of the present application will be described clearly and completely below in combination with the drawings in the present application. Obviously, the described embodiments are some of the embodiments of the present application, but not all the embodiments. Based on the embodiments in the present application, all the other embodiments obtained by those skilled in the art without any creative work under the premise, belong to the scope of protection of the present application.
[0021] The terms "first", "second" are only used for description purpose, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined with "first", "second" can explicitly or implicitly include one or more of the features; in the description of the present application, unless otherwise specified, the meaning of "a plurality of" is two or more.
[0022] The inventors of this invention discovered that most coal-fired power plant generators currently employ a water-hydrogen-hydrogen cooling system, with the stator windings water-cooled, the rotor windings internally cooled by hydrogen, and the stator core externally cooled by hydrogen. Due to hydrogen's low density, its use as a cooling medium minimizes generator ventilation losses, thereby improving generator efficiency. However, the generator requires high-quality hydrogen, demanding a purity of over 98% and maintaining a humidity level between -25°C and -5°C. Therefore, to ensure adequate hydrogen humidity, each generator must be equipped with a hydrogen dryer. The hydrogen dryer is a container filled with activated alumina desiccant, with an explosion-proof fan circulating the hydrogen. The wet vapor generated during the hydrogen drying process is condensed into liquid water in a condenser and then discharged from the system through a steam trap, ensuring the hydrogen remains dry enough to meet subsequent usage requirements.
[0023] The existing hydrogen dryers are equipped with float-type condensate traps, such as... Figure 1 As shown, its outer shell 1 is elliptical, with the water inlet 2 located at the top and the water outlet 3 located on the side. A drain valve 4 is installed inside the outer shell 1 and connected to the water outlet 3. A float 8 is arranged inside the steam trap and fixed by a lever bracket 6 that can move up and down. The other end of the lever bracket 6 is connected to the drain valve 4. The float 8 rises with the internal water level, opening the drain valve 4 through the lever bracket 6 to drain the water. When there is no water, the drain valve 4 closes, sealing the water outlet 3. However, during operation, the float 8 often fails to rise due to jamming of the lever bracket 6, preventing water from draining from the hydrogen dryer.
[0024] Furthermore, the steam trap lacks a manual drain valve, a water level observation window, and an isolation valve assembly, making it difficult to detect problems when they occur. Additionally, hydrogen gas is flammable and explosive, posing a significant risk to equipment maintenance.
[0025] Based on this, in the embodiment of the present invention provided by the inventor, the problem of the float 8 being unable to float due to corrosion of the lever support 6 structure is solved by changing the support structure of the float 8, thereby allowing the water in the hydrogen dryer to be discharged smoothly.
[0026] like Figure 2 As shown in the embodiment of this application, an automatic drainage device for a generator hydrogen dryer includes a float 8 barrel 7, a float 8, and a float 8 valve stem 9 assembly. The float 8 barrel 7 is cylindrical, with a barrel cover 71 fixed at the top and a barrel base 72 fixed at the bottom. A drainage valve 74 is provided on the side opening. A water inlet valve 73 is provided on the barrel cover 71. The float 8 is located in the upper part of the float 8 barrel 7. The float 8 is hollow inside and has an internal thread at its bottom that is fixedly connected to the float 8 valve stem 9 assembly. The float 8 can float up and down according to the change of liquid level in the float 8 barrel 7.
[0027] The float ball 8 valve rod 9 assembly includes a valve rod 9, a valve seat 10 and a valve rod support 11. The valve rod 9 is provided with external threads at both ends, one end of which is connected with the float ball 8, and the other end is connected with the valve rod support 11. The valve rod 9 is fixedly connected with a valve core 91 at the middle outer position. The valve core 91 is sealingly connected with the valve seat 10. The valve rod support 11 is in the shape of a disc, and is provided with internal threads which are adapted to the external threads of the valve rod 9. The bottom of the barrel body 7 of the float ball 8 is provided with a baffle 12 which is fixedly connected with the barrel body 7 of the float ball 8 and forms a cavity with the barrel body base 72, and the valve rod support 11 is arranged in the cavity. The baffle 12 is provided with a circular hole in the center to allow the valve rod 9 to pass through.
[0028] In the embodiment of the present application, when the hydrophobic device is in operation, the water inlet valve 73 is opened, and the hydrophobic water enters the barrel body 7 of the float ball 8, the water level in the barrel body 7 rises, and the liquid level rises to a certain level, so that the float ball 8 floats up, and the valve rod 9, the valve seat 10 and the valve rod support 11 can also rise with the float ball 8. Then the hydrophobic water enters the bottom of the barrel body 7 of the float ball 8, and when the liquid level is higher than the height of the hydrophobic valve 74, the hydrophobic water is discharged from the hydrophobic valve 74.
[0029] It should be noted that the water inlet valve 73 is generally in an open state, but when the hydrophobic device fails, the water inlet valve 73 needs to be closed to isolate the hydrophobic device.
[0030] In addition, like common hydrophobic devices, since the amount of hydrogen entering the hydrophobic device is very small during normal operation, and most of it will be recycled back to the hydrogen circulation system for continuous use, there is no need for special and complex recycling operations.
[0031] By adopting the above technical scheme, a complete automatic hydrophobic device structure framework is formed, the support structure of the float ball 8 is changed, the float ball 8 floats with the liquid level and can drive the valve rod 9 to move, and the problem that the float ball 8 cannot float up due to corrosion of the lever support 6 structure is solved. The structural design of the barrel body 7 of the float ball 8 ensures the stability and sealing performance of the device, and facilitates installation and maintenance. The connection mode of the valve rod 9 and the valve rod support 11 and the setting of the baffle 12 limit the movement range of the valve rod 9, and ensure the correct cooperation of the valve core 91 and the valve seat 10. In the hydrophobic device of the present application, the cooperation of the float ball 8 with the valve rod 9, the valve seat 10 and other components achieves good sealing effect. When the drain valve 4 is closed, hydrogen leakage can be effectively prevented, and the hydrogen pressure and purity in the hydrogen dryer can be ensured.
[0032] In a possible implementation, the valve core 91 is in the shape of an inverted cone, the valve seat 10 is in the shape of a cylinder, the valve rod 9 and the valve seat 10 have the same center, and the center of the valve seat 10 is provided with an inverted-cone-shaped groove which is in close contact with the valve core 91.
[0033] In the embodiment of the present application, the valve core 91 is processed into an inverted cone shape, the valve seat 10 is processed into a cylinder with the same center as the valve rod 9, and an inverted cone-shaped groove is formed in the center of the valve seat 10 and matched with the valve core 91. During installation, the valve core 91 is accurately matched with the groove of the valve seat 10.
[0034] By adopting the above technical scheme, the inverted cone-shaped valve core 91 is matched with the groove of the valve seat 10, which can achieve better sealing effect, prevent leakage of hydrogen or water during the hydrophobic process, and improve the sealing performance and reliability of the device. The design of the same center ensures that the valve core 91 and the valve seat 10 can always be accurately aligned during movement, ensuring the stability of the sealing performance.
[0035] In a possible implementation, the bucket body 7 side of the floating ball 8 is also provided with a water drain valve 75, and the water drain valve 75 is used for manually draining water.
[0036] By adopting the above technical scheme, the water drain valve 75 is installed at a suitable position on the side of the bucket body 7 of the floating ball 8, and is in communication with the inside of the bucket body 7 of the floating ball 8. A manual water draining path is provided, and when the automatic water draining device fails or needs to be operated in a special way, such as emptying before maintenance, the water in the bucket body 7 of the floating ball 8 can be drained by manually opening the water drain valve 75, which increases the flexibility of operation and the maintainability of the device.
[0037] In a possible implementation, the position of the water drain valve 75 is higher than the position of the water drain valve 74.
[0038] By adopting the above technical scheme, the position of the water drain valve 75 is higher than the position of the water drain valve 74. Such a setting can ensure that during normal automatic water draining, water is first drained from the lower-positioned water drain valve 74, and only when manual emptying or special circumstances are needed, the higher-positioned water drain valve 75 is used. This avoids misdraining water from the water drain valve 75 during normal operation, and also ensures that as much water as possible can be drained from the bucket during manual water draining.
[0039] In a possible implementation, the bucket body 7 side of the floating ball 8 is also provided with a liquid level measuring device 76 for measuring the liquid level of the water draining device; and the liquid level measuring device 76 is fixedly connected to the bucket body 7 of the floating ball 8 through a pipeline.
[0040] In the embodiment of the present application, a suitable liquid level measuring device 76, such as a glass liquid level meter, is selected and fixedly connected to the bucket body 7 of the floating ball 8 through a pipeline, so that the liquid level measuring device 76 can accurately reflect the liquid level in the bucket body 7 of the floating ball 8.
[0041] By adopting the above technical scheme, the liquid level in the bucket body 7 of the floating ball 8 can be monitored in real time, which facilitates the operator to timely understand the running state of the device. When the liquid level is too high, it can be judged that the device may have a fault, and timely measures can be taken for treatment to ensure the normal operation of the device and the safety of the system.
[0042] In a possible implementation, a sealing gasket 77 is arranged between the barrel base 72 and the barrel 7 of the float ball 8.
[0043] By using the above technical solution, the sealing gasket 77 can be made of, for example, a tetrafluoro material, and the sealing gasket 77 is arranged at the connecting position of the barrel base 72 and the barrel 7 of the float ball 8, and the barrel base 72 and the barrel 7 of the float ball 8 are fixedly connected by using bolts and the like. The presence of the sealing gasket 77 enhances the sealing performance between the barrel base 72 and the barrel 7 of the float ball 8, prevents water or hydrogen gas from leaking from the connecting position, and improves the overall sealing performance and safety of the device.
[0044] In a possible implementation, the water inlet valve 73 and the water outlet valve 74 are both stainless steel ball valves, and are both connected to the barrel 7 of the float ball 8 through pipelines, and the water inlet valve 73 and the water outlet valve 74 are both in an open state.
[0045] By using the above technical solution, the stainless steel ball valve has the advantages of corrosion resistance, good sealing performance, long service life and the like, and is suitable for use in the device. The valve is open during normal operation, which ensures the normal entry and exit of water and enables the automatic water outlet device to work according to the design requirements.
[0046] In a possible implementation, the float ball 8 is made of polypropylene.
[0047] By using the above technical solution, the polypropylene material has the characteristics of small density, chemical corrosion resistance, wear resistance and the like, and as the material of the float ball 8, can ensure that the float ball 8 has sufficient buoyancy and can work stably for a long time in an environment containing water and hydrogen gas, is not easy to be corroded and damaged, and improves the service life of the float ball 8 and the reliability of the device.
[0048] Working principle: When the water outlet device is running, the water inlet valve 73 is opened, water outlet enters the barrel 7 of the float ball 8, the water level in the barrel 7 rises, the liquid surface rises to a certain liquid level, the float ball 8 floats up, and the valve rod 9, the valve seat 10 and the valve rod support 11 can rise together with the float ball 8. Then the water outlet enters the bottom of the barrel 7 of the float ball 8, and when the liquid level is higher than the height of the water outlet valve 74, the water outlet is discharged from the water outlet valve 74.
[0049] In the several embodiments of the present application, it should be understood that the disclosed system, modules and method can be implemented in other ways. For example, the above-described module embodiments are only schematic. The division of units is only a logical function division. There can be another division manner in actual implementation, for example, a plurality of units or components can be combined or integrated into another system, or some features can be ignored or not executed. In addition, the coupling or direct coupling or communication connection between the units shown or discussed can be indirect coupling or communication connection through some interface, module or unit, and can be electrical, mechanical or other forms.
[0050] The above examples are only used to illustrate the technical solutions of the present application, but not to limit them. The present application is not limited to the exact construction as has been described above and illustrated in the drawings, and the specific implementation of the present application should not be considered as being limited to these descriptions. Any changes and modifications made by those skilled in the art without departing from the concept of the present application should be considered as falling within the scope of the present application.
Claims
1. An automatic dehumidification device for a generator hydrogen dryer, characterized in that: Includes the float barrel, float, and float valve stem assembly; The float tank is cylindrical, with a lid fixed at the top and a base fixed at the bottom. A drain valve is provided on the side opening; a water inlet valve is provided on the lid. The float is located in the upper half of the float barrel body. The float is hollow inside and has an internal thread at its bottom that is fixedly connected to the float valve stem assembly. The float can float up and down as the liquid level in the float barrel body changes. The float valve stem assembly includes a valve stem, a valve seat, and a valve stem support. Both ends of the valve stem are threaded externally, with one end connected to the float and the other end connected to the valve stem support. A valve core is fixedly connected to the outer middle position of the valve stem. The valve core is sealed to the valve seat. The valve stem support is disc-shaped with internal threads that match the external threads of the valve stem. A baffle is provided at the bottom of the float barrel, fixedly connected to the float barrel and forming a cavity with the barrel base. The valve stem support is located within the cavity, and a circular hole is provided in the center of the baffle to allow the valve stem to pass through.
2. The automatic dehumidification device for a generator hydrogen dryer according to claim 1, characterized in that, The valve core is inverted conical; the valve seat is cylindrical, with the same center as the valve stem; and its center has an inverted conical groove that fits into the valve core.
3. The automatic dehumidification device for a generator hydrogen dryer according to claim 1, characterized in that, The float tank is also equipped with a drain valve on its side, which is used for manual draining.
4. The automatic dehumidification device for a generator hydrogen dryer according to claim 3, characterized in that, The drain valve is positioned higher than the steam trap.
5. The automatic hydrophobic device for a generator hydrogen dryer according to claim 1, characterized in that, The float barrel is also equipped with a liquid level measuring device on its side, which is used to measure the liquid level of the hydrophobic device; the liquid level measuring device is fixedly connected to the float barrel through a pipe.
6. The automatic hydrophobic device for a generator hydrogen dryer according to claim 1, characterized in that, A sealing gasket is provided between the base of the barrel and the float barrel.
7. The automatic dehumidifying device for a generator hydrogen dryer according to claim 1, characterized in that, Both the inlet valve and the drain valve are stainless steel ball valves, and both are connected to the float tank via pipes. Both the inlet valve and the drain valve are in the open state.
8. The automatic dehumidifying device for a generator hydrogen dryer according to claim 1, characterized in that, The float is made of polypropylene.