Drainage structure of low-pressure heater of thermal power plant

Abstract

The utility model relates to the technical field of low-pressure heaters, and discloses a thermal power plant low-pressure heater drainage structure which comprises a low-pressure heater body, the outer side of the low-pressure heater body is fixedly connected with a communicating water pipe, the end, away from the low-pressure heater body, of the communicating water pipe is fixedly connected with a tank body, and the bottom of the tank body is fixedly connected with a drainage pipe. A valve body assembly is installed on the inner side of the tank body, an adjusting assembly is installed on the top of the tank body, a threaded pipe is sleeved with a lifting plate in a threaded mode, a closing plate is fixedly connected to the bottom of a control rod, a fixing rod is fixedly connected to the middle of the bottom of the closing plate, a sealing plug is fixedly connected to the bottom of the fixing rod, and a conical plug is fixedly connected to the bottom of the sealing plug. By arranging the adjusting assembly and the valve body assembly, the drainage speed of the drainage pipe can be automatically and correspondingly adjusted according to the height of the water level in the low-pressure heater body, and the height of the water level in the low-pressure heater body can be conveniently controlled by adjusting the compression amount of a pressure spring.

Description

Technical Field

[0001] This utility model relates to the field of low-pressure heater technology, and more specifically, to a hydrophobic structure for a low-pressure heater in a thermal power plant. Background Technology

[0002] The function of the low-pressure heater is to use the steam that has done some work in the steam turbine to heat the feedwater in the heater, thereby increasing the water temperature, reducing the amount of steam discharged from the steam turbine to the condenser, reducing energy loss, and improving the cycle efficiency of the thermal system. In order to discharge the condensate from the heater in a timely and reliable manner to maintain the stability of the water level and pressure in the heater, a regulating device is usually installed on the condensate pipe of each heater to regulate the flow rate of the condensate.

[0003] In the prior art patent with authorization announcement number CN214891116U, the device includes a low-pressure heater body, a water box is fixedly installed at the bottom of the low-pressure heater body, a drain pipe is connected to the left side of the bottom of the water box, a drain pipe is connected to the top of the water box, and the top end of the drain pipe passes through the low-pressure heater body and extends into the interior of the low-pressure heater body. A movable cover is slidably connected to the top of the inner wall of the drain pipe.

[0004] However, during use, it was found that the device is not convenient for controlling the drainage flow rate based on the water level inside the heater, and it is not convenient for maintaining the stability of the water level and pressure inside the heater, which increases the limitations of its use. Utility Model Content

[0005] In order to overcome the shortcomings of the existing technology, this utility model provides a hydrophobic structure for a low-pressure heater in a thermal power plant.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a drainage structure for a low-pressure heater in a thermal power plant, comprising a low-pressure heater body, a connecting water pipe fixedly connected to the outer side of the low-pressure heater body, a tank fixedly connected to the end of the connecting water pipe away from the low-pressure heater body, a drain pipe fixedly connected to the bottom of the tank, a valve assembly installed on the inner side of the tank, an adjusting assembly installed on the top of the tank, a control assembly installed on the top of the adjusting assembly, and the adjusting assembly including a fixing frame fixedly connected to the top of the tank, with a movable middle section at the top of the fixing frame. The valve body assembly includes a threaded tube, a movable rod movably fitted to the bottom of the inner side of the threaded tube, a connecting plate fixedly connected to the bottom of the movable rod, a lifting plate threadedly fitted to the outer side of the threaded tube, a pressure spring movably fitted to the outer side of the threaded tube and the movable rod, the pressure spring being located between the connecting plate and the lifting plate, a control rod fixedly connected to the bottom of the connecting plate, a sealing plate fixedly connected to the bottom of the control rod, a fixed rod fixedly connected to the middle of the bottom of the sealing plate, a sealing plug fixedly connected to the bottom of the fixed rod, and a conical plug fixedly connected to the bottom of the sealing plug.

[0007] As a preferred embodiment of this utility model, the control component includes a worm gear fixedly sleeved on the top of the threaded pipe and a fixed block fixedly connected to the top of the fixed frame. A worm is movably sleeved on the inner side of the fixed block, and a handle block is fixedly connected to the right side of the worm. The worm and the worm gear mesh with each other.

[0008] As a preferred embodiment of this utility model, T-shaped sliding grooves are provided on both sides of the inner wall of the fixed frame, and T-shaped positioning blocks are fixedly connected to both sides of the lifting plate, with the T-shaped positioning blocks slidably connected to the T-shaped sliding grooves.

[0009] As a preferred embodiment of this utility model, a roller is movably sleeved on the surface of the T-shaped positioning block away from the lifting plate, and the roller contacts the inner wall of the T-shaped groove.

[0010] As a preferred embodiment of this utility model, a pressure scale is provided on the right side of the front of the fixing frame, and an indicator is fixedly connected to the right side of the front of the lifting plate.

[0011] As a preferred embodiment of this utility model, the sealing plug is adapted to the drain pipe, the conical plug is a conical structure with a top diameter larger than the bottom diameter, and the diameter of the top of the conical plug is the same as the diameter of the sealing plug.

[0012] As a preferred embodiment of this utility model, positioning rods are fixedly connected to all four sides of the top of the sealing plate, and the positioning rods are movably sleeved with the top of the tank.

[0013] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0014] 1. This utility model, by providing an adjustment component and a valve body component, allows water to exert an upward thrust on the sealing plate. When the water pressure is greater than the thrust of the pressure spring on the connecting plate, the sealing plate moves vertically upward, thereby driving the sealing plug and the conical plug to move upward through the fixed rod. Due to the conical structure of the conical plug, the greater the water pressure, the greater the distance the conical plug moves upward, thus increasing the opening between the conical plug and the drain pipe and improving the drainage speed. Therefore, the drainage speed of the drain pipe can be automatically adjusted according to the water level in the low-pressure heater body.

[0015] 2. This utility model is equipped with an adjustment component and a control component. Under the action of the threaded thrust of the threaded pipe, the lifting plate is adjusted in the vertical direction, which in turn adjusts the compression of the pressure spring. When the lifting plate moves downward, the downward thrust of the pressure spring on the connecting plate increases, which in turn requires a greater water pressure to push the sealing plate upward, thus facilitating the control of the water level inside the low-pressure heater body. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of this utility model;

[0017] Figure 2 This is a schematic diagram of the drainage pipe structure of this utility model;

[0018] Figure 3 This is a schematic diagram of the valve body assembly structure of this utility model;

[0019] Figure 4 This is a schematic diagram of the adjustment component structure of this utility model;

[0020] Figure 5 This is a schematic diagram of the lifting plate structure of this utility model;

[0021] Figure 6 This is a schematic diagram of the control component structure of this utility model.

[0022] In the diagram: 1. Low-pressure heater body; 101. Connecting water pipe; 2. Tank; 201. Drain pipe; 3. Valve body assembly; 301. Sealing plate; 302. Control lever; 303. Fixing lever; 304. Sealing plug; 305. Conical plug; 306. Positioning lever; 4. Adjustment assembly; 401. Fixing frame; 411. T-shaped slide; 412. Pressure scale; 402. Threaded pipe; 403. Movable lever; 404. Connecting plate; 405. Lifting plate; 451. T-shaped positioning block; 452. Roller; 406. Pressure spring; 407. Indicator; 5. Control assembly; 501. Worm gear; 502. Fixing block; 503. Worm; 504. Handle block. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] like Figures 1 to 6 As shown, this utility model provides a drainage structure for a low-pressure heater in a thermal power plant, including a low-pressure heater body 1. A connecting water pipe 101 is fixedly connected to the outside of the low-pressure heater body 1. A tank 2 is fixedly connected to the end of the connecting water pipe 101 away from the low-pressure heater body 1. A drain pipe 201 is fixedly connected to the bottom of the tank 2. A valve assembly 3 is installed inside the tank 2. An adjusting assembly 4 is installed on the top of the tank 2. A control assembly 5 is installed on the top of the adjusting assembly 4. The adjusting assembly 4 includes a fixing bracket 401 fixedly connected to the top of the tank 2. A threaded pipe 402 is movably sleeved in the middle of the top of the fixing bracket 401. A movable rod 403 is movably sleeved at the bottom of the inner side of the threaded pipe 402. The bottom of the movable rod 403 is fixedly connected to... The valve assembly 3 includes a connecting plate 404, a lifting plate 405 threadedly connected to the outer side of the threaded pipe 402, a pressure spring 406 movably sleeved on the outer side of the threaded pipe 402 and the movable rod 403, the pressure spring 406 being located between the connecting plate 404 and the lifting plate 405, a control rod 302 fixedly connected to the bottom of the connecting plate 404, a sealing plate 301 fixedly connected to the bottom of the control rod 302, a fixing rod 303 fixedly connected to the middle of the bottom of the sealing plate 301, a sealing plug 304 fixedly connected to the bottom of the fixing rod 303, a conical plug 305 fixedly connected to the bottom of the sealing plug 304, and positioning rods 306 fixedly connected to all four sides of the top of the sealing plate 301, the positioning rods 306 being movably sleeved with the top of the tank body 2.

[0025] In this embodiment, when the power generation load increases, the rate of condensate generation increases, thereby raising the water level in the low-pressure heater body 1. The condensate in the low-pressure heater body 1 flows into the interior of the tank 2 through the connecting water pipe 101. The water exerts an upward thrust on the sealing plate 301. When the water pressure is greater than the thrust of the pressure spring 406 on the connecting plate 404, the sealing plate 301 moves vertically upward, thereby driving the sealing plug 304 and the conical plug 305 to move upward through the fixing rod 303. Due to the conical structure of the conical plug 305, the greater the water pressure, the greater the upward distance of the conical plug 305, thereby increasing the opening between the conical plug 305 and the drain pipe 201, increasing the drainage speed, and thus being able to automatically adjust the drainage speed of the drain pipe 201 according to the height of the water level in the low-pressure heater body 1.

[0026] Under the threaded thrust of the threaded pipe 402, the lifting plate 405 is adjusted vertically, which in turn adjusts the compression of the pressure spring 406. When the lifting plate 405 moves downward, the downward thrust of the pressure spring 406 on the connecting plate 404 increases, which in turn requires greater water pressure to push the sealing plate 301 upward, thereby facilitating the control of the water level inside the low-pressure heater body 1.

[0027] The control component 5 includes a worm gear 501 fixedly sleeved on the top of the threaded tube 402 and a fixing block 502 fixedly connected to the top of the fixing frame 401. A worm 503 is movably sleeved on the inner side of the fixing block 502. A handle block 504 is fixedly connected to the right side of the worm 503. The worm 503 and the worm gear 501 mesh with each other.

[0028] The handle block 504 drives the worm 503 to rotate, and the meshing action of the worm 503 and the worm wheel 501 drives the threaded tube 402 to rotate.

[0029] The inner wall of the fixed frame 401 is provided with T-shaped slide grooves 411 on both sides, and T-shaped positioning blocks 451 are fixedly connected to both sides of the lifting plate 405. The T-shaped positioning blocks 451 are slidably connected to the T-shaped slide grooves 411.

[0030] The T-shaped positioning block 451 and the T-shaped slide 411 work together to position the lifting plate 405, preventing it from rotating or tilting. Then, under the threaded thrust of the threaded tube 402, the lifting plate 405 can be adjusted vertically.

[0031] Among them, the surface of the T-shaped positioning block 451 away from the lifting plate 405 is movably sleeved with a roller 452, and the roller 452 is in contact with the inner wall of the T-shaped slide groove 411.

[0032] When the lifting plate 405 moves, the roller 452 rolls against the inner wall of the T-shaped slide 411, resulting in low friction and preventing the lifting plate 405 from getting stuck during movement.

[0033] The fixed frame 401 has a pressure scale 412 on the right side of its front, and the lifting plate 405 has an indicator 407 fixedly connected to the right side of its front.

[0034] The pressure scale 412 corresponds to the pressure at which the closed plate 301 can be pushed upward by water pressure when the lifting plate 405 is at different heights.

[0035] Among them, the sealing plug 304 is compatible with the drain pipe 201, and the conical plug 305 is a conical structure with a top diameter larger than the bottom diameter. The top diameter of the conical plug 305 is the same as the diameter of the sealing plug 304.

[0036] The sealing plug 304 can seal the drain pipe 201. The greater the upward movement distance of the conical plug 305, the larger the opening between the sealing plate 301 and the sealing plug 304.

[0037] Working principle and usage process of this utility model:

[0038] When the power generation load increases, the rate of condensate production increases, thereby raising the water level inside the low-pressure heater body 1. The condensate inside the low-pressure heater body 1 flows into the interior of the tank 2 through the connecting water pipe 101. The water exerts an upward thrust on the sealing plate 301. When the water pressure is greater than the thrust of the pressure spring 406 on the connecting plate 404, the sealing plate 301 moves vertically upward, thereby driving the sealing plug 304 and the conical plug 305 to move upward through the fixing rod 303. Due to the conical structure of the conical plug 305, the greater the water pressure, the greater the upward distance of the conical plug 305, thus increasing the opening between the conical plug 305 and the drain pipe 201, increasing the drainage speed. Therefore, the drainage speed of the drain pipe 201 can be automatically adjusted according to the height of the water level inside the low-pressure heater body 1.

[0039] The handle block 504 drives the worm gear 503 to rotate, and the meshing action of the worm gear 503 and the worm wheel 501 drives the threaded tube 402 to rotate. Under the threaded thrust of the threaded tube 402, the lifting plate 405 is adjusted vertically, which in turn adjusts the compression of the pressure spring 406. When the lifting plate 405 moves downward, the downward thrust of the pressure spring 406 on the connecting plate 404 increases, which in turn requires greater water pressure to push the sealing plate 301 upward, thus facilitating the control of the water level inside the low-pressure heater body 1.

[0040] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0041] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A low-pressure heater drain structure of a thermal power plant, comprising a low-pressure heater body (1), characterized in that: A connecting water pipe (101) is fixedly connected to the outside of the low-pressure heater body (1). A tank (2) is fixedly connected to one end of the connecting water pipe (101) away from the low-pressure heater body (1). A drain pipe (201) is fixedly connected to the bottom of the tank (2). A valve assembly (3) is installed on the inside of the tank (2). An adjusting assembly (4) is installed on the top of the tank (2). A control assembly (5) is installed on the top of the adjusting assembly (4). The adjusting assembly (4) includes a fixing frame (401) fixedly connected to the top of the tank (2). A threaded pipe (402) is movably sleeved in the middle of the top of the fixing frame (401). A movable rod (403) is movably sleeved at the bottom of the inner side of the threaded pipe (402). The movable rod (403)... A connecting plate (404) is fixedly connected to the bottom. A lifting plate (405) is threaded onto the outer side of the threaded tube (402). A pressure spring (406) is movably sleeved on the outer side of the threaded tube (402) and the movable rod (403). The pressure spring (406) is located between the connecting plate (404) and the lifting plate (405). The valve body assembly (3) includes a control rod (302) fixedly connected to the bottom of the connecting plate (404). A closing plate (301) is fixedly connected to the bottom of the control rod (302). A fixing rod (303) is fixedly connected to the middle of the bottom of the closing plate (301). A sealing plug (304) is fixedly connected to the bottom of the fixing rod (303). A conical plug (305) is fixedly connected to the bottom of the sealing plug (304).

2. The low pressure heater drain structure of a thermal power plant according to claim 1, characterized in that: The control component (5) includes a worm gear (501) fixedly sleeved on the top of the threaded tube (402) and a fixed block (502) fixedly connected to the top of the fixed frame (401). A worm (503) is movably sleeved on the inner side of the fixed block (502). A handle block (504) is fixedly connected to the right side of the worm (503). The worm (503) and the worm gear (501) mesh with each other.

3. The low pressure heater drain structure of claim 1, wherein: The inner walls of the fixed frame (401) are provided with T-shaped grooves (411) on both sides, and the lifting plate (405) is fixedly connected with T-shaped positioning blocks (451) on both sides. The T-shaped positioning blocks (451) are slidably connected to the T-shaped grooves (411).

4. The low pressure heater drain structure of claim 3, wherein: The T-shaped positioning block (451) is movably fitted with a roller (452) on the surface away from the lifting plate (405), and the roller (452) is in contact with the inner wall of the T-shaped groove (411).

5. The low pressure heater drain structure of claim 1, wherein: A pressure scale (412) is provided on the right side of the front of the fixed frame (401), and an indicator (407) is fixedly connected to the right side of the front of the lifting plate (405).

6. The low pressure heater drain structure of claim 1, wherein: The sealing plug (304) is compatible with the drain pipe (201). The conical plug (305) is a conical structure with a top diameter larger than the bottom diameter. The top diameter of the conical plug (305) is the same as the diameter of the sealing plug (304).

7. The low pressure heater drain structure of claim 1, wherein: Positioning rods (306) are fixedly connected to the top of the sealing plate (301) around all four sides, and the positioning rods (306) are movably sleeved with the top of the tank (2).

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