Auxiliary opening device for high-pressure heater drain valve of thermal power plant

Abstract

The present application relates to the technical field of thermal power plants, and particularly relates to a high-pressure heater drain regulating valve auxiliary opening device for a thermal power plant, which comprises a connecting flange, a control unit arranged on the outer surface of the connecting flange, an electric drive unit arranged on the upper surface of the control unit, and a manual unit arranged on the outer surface of the electric drive unit; the control unit comprises a control assembly arranged on one side of the connecting flange and a heating assembly arranged on the outer surface of the control assembly; the electric drive unit comprises a driving assembly arranged on the outer surface of the control unit; and the manual unit comprises a connecting assembly arranged on the outer surface of the electric drive unit and a manual assembly arranged on the outer surface of the connecting assembly. The device is driven by mechanical and electrical complementation, actively temperature-controlled, protected and modularly integrated, thereby realizing fast, safe and reliable processing of the high-pressure heater drain regulating valve sticking defect, and significantly improving the operation stability of the steam extraction regenerative system and the overall maintenance level of the unit.

Description

Technical Field

[0001] This invention relates to the field of thermal power plant technology, and in particular to an auxiliary opening device for a high-pressure heater drain valve in a thermal power plant. Background Technology

[0002] In thermal power plants, the operation of the extraction steam regeneration system has a significant impact on the overall power generation efficiency of the turbine unit. Furthermore, the working status of the drain valves of each heater directly affects the safe and stable operation of the extraction steam regeneration system. There have even been extreme cases where water ingress into the unit occurred due to untimely handling of high-pressure heater drain valve jamming. Therefore, in the maintenance work of thermal power plants, a specialized tool capable of quickly addressing valve jamming defects is needed.

[0003] In the prior art, patent document CN117052971A discloses an auxiliary opening device for a high-pressure heater drain valve in a thermal power plant, relating to the technical field of thermal power plants. The auxiliary opening device includes a clamping assembly and a fixing member. The clamping assembly is detachably mounted on the valve stem of the high-pressure heater drain valve, and the fixing member is mounted on the clamping assembly to fix the clamping assembly to the valve stem. This invention's auxiliary opening device for a high-pressure heater drain valve in a thermal power plant, by fixing the clamping assembly to the valve stem, is located between the valve's Haver joint and the packing gland, and is connected by the fixing member to form a rigid whole, thus holding the valve stem. This device is applicable to valve position adjustment, including but not limited to high-pressure heater drain pneumatic valves.

[0004] The existing technology has the following problems: the device cannot be opened with the assistance of external force during use, thus reducing the functionality of the auxiliary opening device; the device cannot assist in heating the connection part of the high-pressure heater drain valve during use, which can easily lead to freezing at low temperatures. Summary of the Invention

[0005] The purpose of this invention is to provide an auxiliary opening device for the high-pressure heater drain valve of a thermal power plant, which can solve the above-mentioned technical problems.

[0006] This invention provides an auxiliary opening device for the high-pressure heater drain valve of a thermal power plant, comprising: Connecting flange; Control unit disposed on the outer surface of the connecting flange; An electric drive unit disposed on the upper surface of the control unit; And a manual unit disposed on the outer surface of the electric drive unit; The control unit includes a control component disposed on one side of the connecting flange and a heating component disposed on the outer surface of the control component. The electric drive unit includes a drive component disposed on the outer surface of the control unit. The manual unit includes a connecting component disposed on the outer surface of the electric unit and a manual component disposed on the outer surface of the connecting component.

[0007] Preferably, the control component includes a protective housing, the outer surface of which is fixedly connected to the outer surface of the connecting flange, the inner wall of which is provided with a channel, a fixed rod is rotatably connected to the inner wall of the channel, and a valve body rotatably connected to the bottom of the fixed rod is fixedly connected to the inner wall of the channel.

[0008] Preferably, the heating assembly includes a heating resistance wire, the outer surface of which is fixedly connected to the outer surface of the channel, a temperature sensor is detachably connected to the inner wall of the protective housing, a first mounting plate is fixedly connected to the outer surface of the protective housing, a heating ring is fixedly connected to the outer surface of the first mounting plate, and a heat-conducting plate that adheres to the outer surface of the connecting flange is fixedly connected to the outer surface of the heating ring.

[0009] Preferably, the drive assembly includes a mounting base, the bottom surface of which is fixedly connected to the upper surface of the protective housing. The top of the mounting base is provided with a mounting ring, and a connecting rod fixedly connected to one end of a fixed rod is provided inside the mounting ring. A connecting gear is fixedly sleeved on the outer surface of the connecting rod. The connecting gear meshes with a first fixed gear. The first fixed gear is driven by a first reducer fixedly connected to the outer surface of the mounting ring. The connecting end of the first reducer is provided with a main drive motor.

[0010] Preferably, the terminals of the main drive motor are electrically connected to a PLC controller.

[0011] Preferably, the electric drive unit further includes a spare component disposed on the outer surface of the drive assembly.

[0012] Preferably, the backup component includes a second reducer, the outer surface of the second reducer is fixedly connected to the outer surface of the mounting ring, the output end of the second reducer is also connected to a second fixed gear, and the connection end of the second reducer is provided with a backup drive motor.

[0013] Preferably, the connecting assembly includes a second mounting plate, the bottom surface of which is fixedly connected to the top of the mounting ring, and a mounting housing is fixedly connected to the outer surface of the second mounting plate. The mounting housing is provided with a drive gear that is rotatably connected to the second mounting plate. A driven gear is meshed with one side of the drive gear, and the driven gear is fixedly connected to the top of the connecting rod.

[0014] Preferably, the manual component includes a mounting post, the bottom surface of which is fixedly connected to the upper surface of the drive gear, and a rotating handle is detachably connected to the top of the mounting post.

[0015] Preferably, a limiting sleeve is fixedly connected to the outer surface of the rotating handle, an adjusting handle is slidably connected to the inner wall of the limiting sleeve, and a fixing bolt for engaging the adjusting handle is threadedly connected to the side wall of the limiting sleeve.

[0016] Beneficial effects: This invention, by incorporating both an electric drive unit and a manual unit, can quickly switch to manual operation in the event of electric drive failure, providing dual protection. This significantly improves the success rate of valve opening under abnormal conditions such as jamming or power outages, preventing major safety hazards such as water ingress into the unit due to valve refusal to operate. The integrated heating component in the control unit enables controllable heating of the valve stem and connecting parts, effectively preventing valve jamming caused by medium condensation or freezing in low-temperature environments, thus enhancing the applicability and reliability of the device in cold seasons or low-temperature regions. Through electromechanical complementary drive, active temperature control protection, and modular integrated design, this device achieves rapid, safe, and reliable handling of jamming defects in high-pressure heater drain valves, significantly improving the operational stability of the extraction steam regeneration system and the overall maintenance level of the unit. Attached Figure Description

[0017] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the front structure of the present invention; Figure 3 This is a partial structural diagram of the control unit of the present invention; Figure 4 This is a schematic diagram of the structural heating component of the present invention; Figure 5 This is a schematic diagram of the manual unit structure of the present invention; Figure 6 This is a schematic diagram of the electric drive unit structure of the present invention; Figure 7 This is a partial structural diagram of the electric drive unit of the present invention.

[0019] Explanation of reference numerals in the attached drawings: 1-Connecting flange, 2-Control unit, 21-Protective housing, 22-First mounting plate, 23-Heating ring, 24-Heat conducting plate, 25-Channel, 26-Valve body, 27-Temperature sensor, 28-Heating resistance wire, 29-Fixing rod, 3-Electric drive unit, 31-Mounting base, 32-Connecting rod, 33-Mounting ring, 34-First reducer, 35-Main drive motor, 36-PLC controller, 37-Second reducer, 38-Spare drive motor, 39-Connecting gear, 311-First fixed gear, 312-Second fixed gear, 4-Manual unit, 41-Mounting housing, 42-Second mounting plate, 43-Drive gear, 44-Driven gear, 45-Mounting column, 46-Rotating handle, 47-Limit sleeve, 48-Adjusting handle, 49-Fixing bolt. Detailed Implementation

[0020] The technical solution of the present invention will be clearly and completely described below with reference to the embodiments. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0021] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0022] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of the stated features. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified. Furthermore, the terms "installed," "connected," and "linked" should be interpreted broadly; for example, they may refer to a fixed connection, a detachable connection, or an integral connection; they may refer to a mechanical connection or an electrical connection; they may refer to a direct connection or an indirect connection through an intermediate medium; and they may refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0023] Example 1 like Figure 1-7 As shown, the present invention provides an auxiliary opening device for a high-pressure heater drain valve in a thermal power plant, including a connecting flange 1; a control unit 2 disposed on the outer surface of the connecting flange 1; an electric drive unit 3 disposed on the upper surface of the control unit 2; and a manual unit 4 disposed on the outer surface of the electric drive unit 3. The control unit 2 includes a control component disposed on one side of the connecting flange 1 and a heating component disposed on the outer surface of the control component. The electric drive unit 3 includes a drive component disposed on the outer surface of the control unit 2 and a spare component disposed on the outer surface of the drive component. The manual unit 4 includes a connecting component disposed on the outer surface of the electric drive unit 3 and a manual component disposed on the outer surface of the connecting component.

[0024] Furthermore, the control assembly includes a protective housing 21, the outer surface of which is fixedly connected to the outer surface of the connecting flange 1. The inner wall of the protective housing 21 has a channel 25, and a fixing rod 29 is rotatably connected to the inner wall of the channel 25. A valve body 26, rotatably connected to the bottom of the fixing rod 29, is fixedly connected to the bottom of the fixing rod 29. The heating assembly includes a heating resistance wire 28, the outer surface of which is fixedly connected to the outer surface of the channel 25. A temperature sensor 27 is detachably connected to the inner wall of the protective housing 21. A first mounting plate 22 is fixedly connected to the outer surface of the protective housing 21. A heating ring 23 is fixedly connected to the outer surface of plate 22, and a heat-conducting plate 24 is fixedly connected to the outer surface of heating ring 23 and attached to the outer surface of connecting flange 1. When using the auxiliary opening device for the high-pressure heater drain valve of a thermal power plant, the device is first connected to the control system. During the use of the auxiliary opening device, if the temperature sensor 27 inside the protective housing 21 detects a low temperature, the control system can control the start of the heating resistance wire 28 to assist in heating the channel 25. Using the principle of heat conduction, the first mounting plate 22 and the heating ring 23 assist in heating the outer surface of connecting flange 1.

[0025] Example 2 like Figure 1-7As shown, based on Embodiment 1, the present invention provides a technical solution: Preferably, the drive assembly includes a mounting base 31, the bottom surface of which is fixedly connected to the upper surface of the protective housing 21, a mounting ring 33 detachably connected to the top of the mounting base 31, a connecting rod 32 fixedly connected to one end of a fixing rod 29 inside the mounting ring 33, a connecting gear 39 fixedly connected to the outer surface of the connecting rod 32, a first fixing gear 311 meshing with the outer surface of the connecting gear 39, a first reducer 34 fixedly connected to one end of the first fixing gear 311 and fixedly connected to the outer surface of the mounting ring 33, a main drive motor 35 detachably connected to the connecting end of the first reducer 34, and a PLC controller 36 electrically connected to the wiring terminal of the main drive motor 35. The backup component includes a second reducer 37, the outer surface of which is fixedly connected to the outer surface of the mounting ring 33. The output end of the second reducer 37 is also connected to a second fixed gear 312. The connection end of the second reducer 37 is detachably connected to a backup drive motor 38. When it is necessary to control the switch of the auxiliary opening device of the high-pressure heater drain valve of the thermal power plant, the main drive motor 35 can be started by the PLC controller 36 to cooperate with the first reducer 34 to drive the first fixed gear 311 to rotate. In turn, the valve body 26 can be driven to rotate by cooperating with the connecting gear 39, the fixed rod 29 and the connecting rod 32, thereby controlling the opening of the high-pressure heater drain valve of the thermal power plant. The cooperation between the second reducer 37 and the backup drive motor 38 has the same effect.

[0026] Example 3 like Figure 1-7As shown, based on Embodiment 1, the present invention provides a technical solution: Preferably, the connecting assembly includes a second mounting plate 42, the bottom surface of the second mounting plate 42 is fixedly connected to the top of the mounting ring 33, the outer surface of the second mounting plate 42 is fixedly connected to a mounting housing 41, the upper surface of the second mounting plate 42 is rotatably connected to a drive gear 43, the outer surface of the drive gear 43 is meshed with a driven gear 44, and the driven gear 44 is fixedly connected to the top of the connecting rod 32. The manual assembly includes a mounting post 45, the bottom surface of the mounting post 45 is fixedly connected to the upper surface of the drive gear 43, the top of the mounting post 45 is detachably connected to a rotating handle 46, and the outer surface of the rotating handle 46 is fixedly connected to a limit sleeve 47. An adjusting handle 48 is slidably connected to the inner wall of the limiting sleeve 47, and a fixing bolt 49 for engaging the adjusting handle 48 is threadedly connected to the side wall of the limiting sleeve 47. When the auxiliary opening device of the high-pressure heater drain valve of the thermal power plant encounters special circumstances and cannot be driven by electricity, it can be controlled manually. When manual control is used, the position of the adjusting handle 48 on the inner wall of the limiting sleeve 47 can be adjusted by rotating the fixing bolt 49, thereby increasing the lever arm and making it easier for the operator to rotate the handle 46. At the same time, the connecting rod 32 can be driven to rotate by the mutual cooperation of the driving gear 43 and the driven gear 44, so that the opening and closing of the auxiliary opening device of the high-pressure heater drain valve of the thermal power plant can be controlled manually.

[0027] The working principle of the auxiliary opening device of the high-pressure heater drain valve of this thermal power plant will be explained in detail below.

[0028] like Figure 1-7As shown, when using the auxiliary opening device for the high-pressure heater drain valve of a thermal power plant, the device is first connected to the control system. During the use of the auxiliary opening device, if the temperature sensor 27 inside the protective housing 21 detects a low temperature, the control system can control the starting of the heating resistance wire 28 to assist in heating the channel 25. Utilizing the principle of heat conduction, the first mounting plate 22 and heating ring 23 assist in heating the outer surface of the connecting flange 1. When it is necessary to control the opening and closing of the auxiliary opening device for the high-pressure heater drain valve of the thermal power plant, the PLC controller 36 can control the starting of the main drive motor 35, which, in conjunction with the first reducer 34, drives the first fixed gear 311 to rotate, thereby cooperating with the connecting gear 39, the fixed rod 29, and the connecting rod 32. The valve body 26 can be driven to rotate, thereby controlling the opening of the high-pressure heater drain valve in the thermal power plant. The cooperation between the second reducer 37 and the backup drive motor 38 also has the same effect. When the auxiliary opening device of the high-pressure heater drain valve in the thermal power plant encounters special circumstances and cannot be driven by electricity, it can be controlled manually. When manual control is used, the position of the adjusting handle 48 on the inner wall of the limit sleeve 47 can be adjusted by rotating the fixing bolt 49, thereby increasing the lever arm and making it easier for the operator to turn the rotating handle 46. At the same time, the connecting rod 32 can be driven to rotate by the cooperation of the drive gear 43 and the driven gear 44, thereby controlling the opening and closing of the auxiliary opening device of the high-pressure heater drain valve in the thermal power plant manually.

[0029] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. An auxiliary opening device for a high-pressure heater drain valve in a thermal power plant, characterized in that, include: Connecting flange; Control unit disposed on the outer surface of the connecting flange; An electric drive unit disposed on the upper surface of the control unit; And a manual unit disposed on the outer surface of the electric drive unit; The control unit includes a control component disposed on one side of the connecting flange and a heating component disposed on the outer surface of the control component. The electric drive unit includes a drive component disposed on the outer surface of the control unit. The manual unit includes a connecting component disposed on the outer surface of the electric unit and a manual component disposed on the outer surface of the connecting component.

2. The auxiliary opening device for the high-pressure heater drain valve of a thermal power plant according to claim 1, characterized in that, The control component includes a protective housing, the outer surface of which is fixedly connected to the outer surface of the connecting flange. The inner wall of the protective housing is provided with a channel, and a fixed rod is rotatably connected to the inner wall of the channel. A valve body that is rotatably connected to the inner wall of the channel is fixedly connected to the bottom of the fixed rod.

3. The auxiliary opening device for the high-pressure heater drain valve of a thermal power plant according to claim 2, characterized in that, The heating assembly includes a heating resistance wire, the outer surface of which is fixedly connected to the outer surface of the channel. A temperature sensor is detachably connected to the inner wall of the protective housing. A first mounting plate is fixedly connected to the outer surface of the protective housing. A heating ring is fixedly connected to the outer surface of the first mounting plate. A heat-conducting plate that adheres to the outer surface of the connecting flange is fixedly connected to the outer surface of the heating ring.

4. The auxiliary opening device for the high-pressure heater drain valve of a thermal power plant according to claim 2, characterized in that, The drive assembly includes a mounting base, the bottom surface of which is fixedly connected to the upper surface of the protective housing. The top of the mounting base is provided with a mounting ring, and a connecting rod is provided inside the mounting ring and fixedly connected to one end of a fixed rod. A connecting gear is fixedly sleeved on the outer surface of the connecting rod, and the connecting gear is meshed with a first fixed gear. The first fixed gear is driven by a first reducer fixedly connected to the outer surface of the mounting ring, and a main drive motor is provided at the connecting end of the first reducer.

5. The auxiliary opening device for the high-pressure heater drain valve of a thermal power plant according to claim 4, characterized in that, The main drive motor is electrically connected to a PLC controller.

6. The auxiliary opening device for the high-pressure heater drain valve of a thermal power plant according to claim 4, characterized in that, The electric drive unit also includes a spare component disposed on the outer surface of the drive assembly.

7. The auxiliary opening device for the high-pressure heater drain valve of a thermal power plant according to claim 6, characterized in that, The backup component includes a second reducer, the outer surface of which is fixedly connected to the outer surface of the mounting ring. The output end of the second reducer is also connected to a second fixed gear, and the connection end of the second reducer is provided with a backup drive motor.

8. The auxiliary opening device for the high-pressure heater drain valve of a thermal power plant according to claim 4, characterized in that, The connecting assembly includes a second mounting plate, the bottom surface of which is fixedly connected to the top of the mounting ring. A mounting housing is fixedly connected to the outer surface of the second mounting plate. A drive gear that is rotatably connected to the second mounting plate is provided inside the mounting housing. A driven gear is meshed with one side of the drive gear. The driven gear is fixedly connected to the top of the connecting rod.

9. The auxiliary opening device for the high-pressure heater drain valve of a thermal power plant according to claim 8, characterized in that, The manual assembly includes a mounting post, the bottom surface of which is fixedly connected to the upper surface of the drive gear, and a rotating handle is detachably connected to the top of the mounting post.

10. The auxiliary opening device for the high-pressure heater drain valve of a thermal power plant according to claim 9, characterized in that, A limiting sleeve is fixedly connected to the outer surface of the rotating handle, an adjusting handle is slidably connected to the inner wall of the limiting sleeve, and a fixing bolt for engaging the adjusting handle is threaded to the side wall of the limiting sleeve.

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