Feed water rectifying device of high-pressure heater

Abstract

The invention discloses a feed water rectifying device for a high-pressure heater, which is used for rectifying high-pressure feed water entering the high-pressure heater, the high-pressure heater comprises a sealing cover and a partition plate, the partition plate is arranged in the sealing cover and is used for dividing the interior of the sealing cover into an upper space and a lower space for accommodating the feed water; the driving assembly can move when the space, close to the lower side, in the sealing cover is filled with water, and can reset after water supply in the space, close to the lower side, in the sealing cover is reduced; the blocking assembly is slidably arranged at the position, corresponding to the lower side space, of the sealing cover, and the blocking assembly is used for blocking a pipe hole, corresponding to the lower side space, of the pipe plate and can relieve blocking of the corresponding pipe hole when the driving assembly moves; and the flow guide assembly is arranged in the sealing cover and used for reducing impact force generated when high-pressure feed water enters the sealing cover. The impact of water supply on the tube plate can be effectively reduced, so that the use safety is improved, and the service life of the tube plate is prolonged.

Description

Technical Field

[0001] The invention relates to the technical field of high-pressure heating equipment, and in particular to a water supply rectifying device for a high-pressure heater. Background Art

[0002] The statements herein merely provide background information related to the present invention and do not necessarily constitute prior art.

[0003] As the scale of thermal power plants and nuclear power plants continues to expand, high-parameter large units are becoming increasingly popular. As a key device to improve the efficiency of thermal cycles, the operation stability of high-pressure heaters has attracted much attention. At present, high-pressure heaters are usually set between boiler economizers or nuclear power evaporators and feedwater pumps, and are used to exchange heat between feedwater and steam. In order to prevent the damaging impact of high-pressure feedwater on the tube sheet, the existing technology often welds a cladding layer of low-carbon steel, low-carbon stainless steel or nickel-based alloy on the surface of the tube sheet to absorb the impact and improve the quality of the sealing welds between the heat exchange tube and the tube sheet. However, under the conditions of high-parameter large units and large flow rates, the cladding layer and the sealing weld are subjected to long-term impact of high-pressure feedwater, and the probability of fatigue damage is greatly increased. Once damaged, it is easy to cause feedwater leakage, reduce the efficiency of the unit, and even threaten the safety of operation. In addition, failures caused by quality problems such as corrosion or welding defects should not be underestimated. Therefore, how to design a feedwater rectifier device for a high-pressure heater that can reduce the impact of feedwater on the tube sheet and effectively improve the safety and life of the equipment has become a problem that needs to be solved by people in this field. Summary of the invention

[0004] The purpose of the present invention is to provide a high-pressure heater water supply rectification device to address the above-mentioned deficiencies, thereby reducing the impact of water supply on the tube sheet and effectively improving the safety and life of the equipment.

[0005] In order to solve the above technical problems, the present invention adopts the following technical solutions: a high-pressure heater feed water rectifying device, used to rectify the high-pressure feed water entering the high-pressure heater, the high-pressure heater includes a cover, including;

[0006] A partition plate is arranged in the sealing cover to separate the interior of the sealing cover into two upper and lower spaces for accommodating feed water;

[0007] A driving assembly, which can move when the space below the cover is filled with water, and can also reset when the space below the cover is reduced in water;

[0008] A blocking component is slidably disposed at the corresponding lower side space of the cover, the blocking component is used to block the tube hole at the corresponding lower side space of the tube plate, and can also release the blockage of the corresponding tube hole when the driving component moves;

[0009] The diversion component is arranged inside the cover and is used to reduce the impact force when high-pressure feed water enters the inside of the cover.

[0010] Further, the driving component includes a sleeve arranged on the partition board. An adjusting rod that is in dynamic sealing cooperation with the sleeve is slidably arranged inside the sleeve. A first spring that contacts the adjusting rod is further arranged inside the sleeve. A transmission pipe that communicates with the sleeve is arranged on the upper side of the sleeve. The side of the transmission pipe away from the sleeve is arranged on the partition board and communicates with the space at the lower side of the cover corresponding thereto.

[0011] After the space at the lower side of the cover corresponding to the transmission pipe is filled with feed water, the transmission pipe can guide the continuously incoming water into the sleeve and push the adjusting rod to move downward.

[0012] When moving downward, the adjusting rod can drive the driving component to move and release the blockage of the corresponding pipe hole.

[0013] Further, the blocking component includes a bearing sleeve detachably arranged at the bottom of the cover. The inside of the bearing sleeve is hollow and the top is open. The cover communicates with the open part of the bearing sleeve. A baffle is slidably arranged inside the bearing sleeve. The bottom of the adjusting rod is connected to the baffle. When the adjusting rod moves downward, it can push the baffle to move synchronously and release the blockage state of the pipe hole blocked by the baffle.

[0014] Further, the blocking component further includes a flange arranged on the high-pressure heater. The flange is located on the side of the bearing sleeve away from the feed water entering the inside of the cover. The flange contacts the bearing sleeve and is connected by bolts.

[0015] Further, the diversion component includes a telescopic rod arranged inside the cover. A conical diversion hopper is arranged at the telescopic end of the telescopic rod. A plurality of through holes are formed in the diversion hopper. A semi-circular shielding ring is further arranged inside the cover. The side of the telescopic rod away from the diversion hopper is connected to the shielding ring.

[0016] The side with a smaller diameter of the diversion hopper faces the input end of the cover.

[0017] The shielding ring is used to prevent the feed water from directly impacting the weld between the tube sheet and the high-pressure heater after entering the inside of the cover.

[0018] Further, a pressure relief component is further included. The pressure relief component is used to open and relieve pressure after the pressure in the space at the lower side of the cover exceeds the threshold.

[0019] Further, the pressure relief component includes a housing and a pressure relief port provided at the bottom of the cover. The cover, the housing, and the pressure relief port are sequentially communicated. A plug block that is movably and sealingly engaged with the housing is slidably provided inside the housing. The plug block is disposed at the same height as the pressure relief port. A trigger rod is provided on the plug block, and a second spring with a spring force greater than that of the first spring is provided on the inner bottom wall of the housing.

[0020] When the pressure in the lower space of the cover exceeds the threshold value, the trigger rod can be pushed downward and drive the plug block to move synchronously to connect the cover, the housing, and the pressure relief port with each other.

[0021] The beneficial effects of the present invention are reflected in:

[0022] In the present invention, when the high-pressure feed water enters the lower space of the cover from the water inlet pipe, it will first pass through the flow guiding component. When contacting the flow guiding component, the flow rate of the water will slow down, and it will be blocked in front of the tube sheet by the blocking component. Therefore, the feed water will not directly impact the tube sheet. When the water in the lower space inside the cover is full, it will cooperate with the driving component to drive the blocking component to move, so that the blocking component releases the blockage of the corresponding tube hole. In this state, the water will enter the U-shaped tube from the tube hole for subsequent heat exchange; this structure can effectively reduce the impact of the feed water on the tube sheet, thereby improving its safety and service life during use. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 is a three-dimensional view of the present invention;

[0024] Figure 2 is a sectional view of the cover in the present invention;

[0025] Figure 3 in the present invention Figure 2 is a partial view of A shown;

[0026] Figure 4 is a side sectional view of the cover in the present invention;

[0027] Figure 5 in the present invention Figure 4 is a partial view of B shown.

[0028] In the figure:

[0029] 1. High-pressure heater; 11. Cover; 12. Water inlet pipe; 13. Drain pipe; 14. Heat exchanger body; 15. Air port; 16. Tube sheet;

[0030] 2. Partition board;

[0031] 3. Driving component; 31. Sleeve body; 32. Adjusting rod; 33. First spring; 34. Transmission pipe;

[0032] 4. Blocking component; 41. Bearing sleeve; 42. Flange; 43. Baffle;

[0033] 5. Diversion component; 51. Telescopic rod; 52. Diversion hopper; 53. Shielding ring;

[0034] 6. Pressure relief component; 61. Housing; 62. Pressure relief port; 63. Plugging block; 64. Trigger rod; 65. Second spring. Detailed implementation manner

[0035] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Without conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. Based on the embodiments in the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present invention.

[0036] Please refer to Figures 1-5 , the present invention discloses a high-pressure heater feed water rectifying device for rectifying the high-pressure feed water entering the high-pressure heater 1. The high-pressure heater 1 includes a cover 11, a water inlet pipe 12, a drain pipe 13, a heat exchanger body 14, an air port 15 and a tube sheet 16. Among them, the cover 11 is installed on one side of the heat exchanger body 14, and the water inlet pipe 12 and the drain pipe 13 are respectively installed on the lower side and the upper side of the cover 11 in a communicating manner. There are two air ports 15, which are respectively opened on the upper and lower sides of the heat exchanger body 14 and communicate with its interior. The tube sheet 16 is installed between the cover 11 and the heat exchanger body 14, and is used to install and position a plurality of U-shaped tubes, and the output end and the input end of the U-shaped tube both face the cover 11. A partition 2 is installed in the cover 11, and the partition 2 is used to divide the interior of the cover 11 into two upper and lower spaces for accommodating feed water.

[0037] With such a design, the high-pressure feed water is input from the water inlet pipe 12 into the lower space of the cover 11, passes through each U-shaped tube and is then conveyed to the upper space of the cover 11, and finally discharged from the drain pipe 13. The steam enters the heat exchanger body 14 from one of the air ports 15 and is discharged from the other heat exchanger body 14. The steam will exchange heat with the feed water passing through the U-shaped tube, thereby completing the heating step. The above-mentioned high-pressure heater 1 belongs to the common knowledge in the art, so the specific structural composition and working principle thereof will not be described in detail herein.

[0038] In one embodiment, the device further includes a driving component 3, a blocking component 4, and a diversion component 5. Among them, the driving component 3 can move when the lower space in the cover 11 is filled with feed water, and can also reset after the feed water in the lower space in the cover 11 decreases; the blocking component 4 is slidably arranged at the corresponding lower space of the cover 11, and is used to block the tube holes at the corresponding lower space of the tube sheet 16, and can also release the blockage of the corresponding tube holes when the driving component 3 moves; the diversion component 5 is arranged in the cover 11 and is used to reduce the impact force when high-pressure feed water enters the inside of the cover 11.

[0039] In specific implementation, when the high-pressure feed water enters the lower space of the cover 11 from the water inlet pipe 12, it will first pass through the diversion component 5. When contacting the diversion component 5, the flow rate of the water will slow down, and it will be blocked in front of the tube sheet 16 by the blocking component 4. Therefore, the feed water will not directly impact the tube sheet 16. When the water in the lower space inside the cover 11 is full, it will cooperate with the driving component 3 to drive the blocking component 4 to move, so that the blocking component 4 releases the blockage of the corresponding tube holes. In this state, the water will enter the U-shaped tube from the tube holes for subsequent heat exchange; this structure can effectively reduce the impact of the feed water on the tube sheet 16, thereby improving its safety and service life during use.

[0040] In one embodiment, the driving component 3 includes a sleeve 31 installed on the partition 2. An adjusting rod 32 that is movably and sealingly fitted with the sleeve 31 is slidably installed inside the sleeve 31. A first spring 33 that contacts the adjusting rod 32 is also installed inside the sleeve 31. A transfer pipe 34 that is interconnected with the sleeve 31 is installed on the upper side of the sleeve 31. The side of the transfer pipe 34 away from the sleeve 31 is arranged on the partition 2 and is communicated with the corresponding lower space of the cover 11.

[0041] In specific implementation, when the corresponding lower space of the cover 11 is filled with feed water, too much water will enter the transfer pipe 34. As the water is transferred, it will eventually enter the sleeve 31 and push the adjusting rod 32 to move downward. The adjusting rod 32 can drive the driving component 3 to move and release the blockage of the corresponding tube holes when moving downward; conversely, when the feed water in the lower space of the cover 11 gradually decreases, the pressure on the first spring 33 decreases, and it will drive the adjusting rod 32 to reset and rise, and squeeze out the excess water in the adjusting rod 32. This feed water will flow back into the cover 11 through the transfer pipe 34.

[0042] In one embodiment, the blocking component 4 includes a bearing sleeve 41 detachably installed at the bottom of the cover 11. The inside of the bearing sleeve 41 is hollow and the top is open. The cover 11 is communicated with the open part of the bearing sleeve 41. A baffle 43 is slidably installed up and down inside the bearing sleeve 41. The bottom of the adjusting rod 32 is connected to the baffle 43.

[0043] In specific implementation, in the initial state, the baffle 43 blocks one side of the tube sheet 16 near the water inlet. When the feed water enters the inside of the cover 11, the baffle 43 will play a blocking role to prevent the feed water from directly impacting the tube sheet 16 and causing damage to it. When the adjusting rod 32 moves downward, it can push the baffle 43 to move synchronously, causing the baffle 43 to retract into the bearing sleeve 41. At this time, the tube holes blocked by the baffle 43 will be released from the blocked state. Therefore, the water in the lower space of the cover 11 will directly pass through the corresponding tube holes and enter each U-shaped tube. When the adjusting rod 32 resets and rises, it will drive the blocking assembly 4 to rise and reset synchronously.

[0044] In one embodiment, the blocking assembly 4 further includes a flange 42 provided on the high-pressure heater 1. Specifically, the flange 42 can be welded to the outer wall of the heat exchanger body 14, and the flange 42 is located on the side of the bearing sleeve 41 away from the inside of the cover 11 where the feed water enters. The flange 42 contacts the bearing sleeve 41 and is connected by bolts.

[0045] With this design, when the baffle 43 is impacted by the feed water, the flange 42 can bear the impact to improve the bearing capacity of the baffle 43.

[0046] In one embodiment, the diversion assembly 5 includes a telescopic rod 51 provided in the cover 11. A conical diversion hopper 52 is installed at the telescopic end of the telescopic rod 51. A plurality of through holes are provided on the diversion hopper 52. A semi-circular shielding ring 53 is also installed in the cover 11. One side of the telescopic rod 51 away from the diversion hopper 52 is connected to the shielding ring 53.

[0047] In addition, the diversion hopper 52 is coaxially arranged with the water inlet pipe 12, and the side with a smaller diameter of the diversion hopper 52 faces the water inlet pipe 12. The shielding ring 53 shields the weld where the tube sheet 16 is connected to the high-pressure heater 1, and it is used to prevent the feed water from directly impacting the weld between the tube sheet 16 and the high-pressure heater 1 after entering the inside of the cover 11.

[0048] In specific implementation, when the feed water passes through the water inlet pipe 12 and enters the inside of the cover 11, it will be diverted by the diversion hopper 52. It cooperates with the water in the lower space of the cover 11 to reduce the impact on the baffle 43 when continuously entering the cover 11 from the water pipe 12. And, through the setting of the shielding ring 53, when the baffle 43 retracts into the bearing sleeve 41, the impact of the feed water on the weld between the tube sheet 16 and the high-pressure heater 1 will be blocked by the shielding ring 53, thereby effectively improving the use safety of the tube sheet 16 and further increasing the service life.

[0049] In one embodiment, the device further includes a pressure relief assembly 6.

[0050] With this design, the pressure relief assembly 6 can be opened and relieved of pressure when the pressure in the lower space of the cover 11 exceeds the threshold value to prevent damage to the equipment caused by factors such as improper operation.

[0051] In one embodiment, the pressure relief assembly 6 includes a housing 61 disposed at the bottom of the cover 11 and a pressure relief port 62. The housing 61 is mounted at the bottom of the cover 11, and the pressure relief port 62 is disposed at the lower side of the side wall of the housing 61. The cover 11, the housing 61, and the pressure relief port 62 are communicated in sequence. A plugging block 63 that is movably and sealingly engaged with the housing 61 is slidably mounted inside the housing 61. The plugging block 63 is disposed at the same height as the pressure relief port 62. A trigger rod 64 is mounted on the plugging block 63, and a second spring 65 with a spring force greater than that of the first spring 33 is mounted on the inner bottom wall of the housing 61.

[0052] With such a design, the trigger rod 64 can be pushed downward when the pressure in the lower space of the cover 11 exceeds the threshold, and the plugging block 63 is driven to move synchronously to connect the cover 11, the housing 61, and the pressure relief port 62.

[0053] In a specific implementation, when the water in the lower space of the cover 11 is full, it will preferentially enter the driving assembly 3 and drive it to move. When the water in the driving assembly 3 is full and the water inlet volume of the high-pressure heater 1 is still greater than the water outlet volume, the pressure in the lower space of the cover 11 increases. When it exceeds the threshold, it will squeeze the trigger rod 64 to move downward. During this process, the plugging block 63 will synchronously descend and release the plugging of the pressure relief port 62. At this time, the cover 11, the housing 61, and the pressure relief port 62 are communicated with each other, and the excess water can be discharged from the pressure relief port 62, thereby completing the pressure relief.

[0054] It should be noted that if there are directional indications (such as up, down, left, right, front, back...) in the embodiments of the present invention, the directional indications are only used to explain the relative positional relationship and movement conditions between components in a specific posture (as shown in the drawings). If the specific posture changes, the directional indications will also change accordingly.

[0055] In addition, if there are descriptions such as "first" and "second" in the embodiments of the present invention, the descriptions of "first", "second", etc. are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions between various embodiments can be combined with each other, but it must be based on the fact that those skilled in the art can implement them. When the combination of technical solutions results in contradictions or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the protection scope required by the present invention.

[0056] In addition, "a plurality" means more than two.

[0057] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included within the protection scope of the present invention.

Claims

1. A high-pressure heater feed water rectifying device for rectifying the high-pressure feed water entering the high-pressure heater (1), wherein the high-pressure heater (1) includes a cover (11), and is characterized in that, include; A partition (2) is arranged inside the sealing cover (11) to separate the interior of the sealing cover (11) into two upper and lower spaces for accommodating feed water; A driving assembly (3) which is capable of moving when the space below the cover (11) is filled with water, and is also capable of resetting when the space below the cover (11) is reduced in water; A blocking component (4) is slidably disposed in a space corresponding to the lower side of the cover (11), the blocking component (4) is used to block the tube hole in the space corresponding to the lower side of the tube plate (16), and can also release the blockage of the corresponding tube hole when the driving component (3) moves; The flow guide component (5) is arranged in the sealing cover (11) and is used to reduce the impact force when the high-pressure water enters the interior of the sealing cover (11).

2. The feed water rectifying device of a high-pressure heater according to claim 1, wherein: The driving assembly (3) comprises a sleeve (31) arranged on the partition (2), an adjusting rod (32) which is slidably arranged on the inner side of the sleeve (31) and is dynamically sealed with the adjusting rod (32), a first spring (33) which is in contact with the adjusting rod (32) is also arranged on the inner side of the sleeve (31), a transmission pipe (34) which is in communication with the sleeve (31) is arranged on the upper side of the sleeve (31), a side of the transmission pipe (34) which is away from the sleeve (31) is arranged on the partition (2), and the transmission pipe (34) is in communication with the space on the corresponding lower side of the cover (11); The transmission pipe (34) can guide the water to continue to enter the sleeve body (31) after the space at the lower side of the cover (11) is filled with water, and push the adjustment rod (32) to move downward; The adjusting rod (32) can drive the driving assembly (3) to move and release the blockage of the corresponding pipe hole when moving downward.

3. The feed water rectifying device of a high-pressure heater according to claim 2, characterized in that: The blocking assembly (4) comprises a detachable bearing sleeve (41) arranged at the bottom of the cover (11); the bearing sleeve (41) is hollow inside and open at the top; the cover (11) is connected to the open part of the bearing sleeve (41); a baffle (43) is arranged in the bearing sleeve (41) so as to slide up and down; the bottom of the adjusting rod (32) is connected to the baffle (43); when the adjusting rod (32) moves downward, it can push the baffle (43) to move synchronously, and release the blocked state of the pipe hole blocked by the baffle (43).

4. The feed water rectifying device for a high-pressure heater according to claim 3, wherein: The blocking assembly (4) further comprises a flange (42) arranged on the high-pressure heater (1), wherein the flange (42) is located on a side of the bearing sleeve (41) away from the inside of the water supply cover (11), and the flange (42) is in contact with the bearing sleeve (41) and connected to the bearing sleeve (41) by bolts.

5. The feed water rectifying device of a high-pressure heater according to claim 1, characterized in that: The flow guide assembly (5) comprises a telescopic rod (51) arranged in the cover (11); a conical flow guide hopper (52) is arranged at the telescopic end of the telescopic rod (51); a plurality of through holes are formed on the flow guide hopper (52); a semi-annular shielding ring (53) is also arranged in the cover (11); a side of the telescopic rod (51) away from the flow guide hopper (52) is connected to the shielding ring (53); The side of the guide hopper (52) with a smaller diameter faces the input end of the cover (11); The blocking ring (53) is used to prevent the feed water from directly impacting the weld between the tube sheet (16) and the high-pressure heater (1) after entering the interior of the cover (11).

6. The feed water rectifying device of a high-pressure heater according to claim 2, characterized in that: It further includes a pressure relief component (6), and the pressure relief component (6) is used to open and relieve pressure after the pressure in the lower space of the cover (11) exceeds a threshold value.

7. The feed water rectifying device of a high-pressure heater according to claim 6, characterized in that: The pressure relief component (6) includes a housing (61) and a pressure relief port (62) provided at the bottom of the cover (11). The cover (11), the housing (61), and the pressure relief port (62) are sequentially communicated. A plugging block (63) that is movably and sealingly matched with the housing (61) is slidably arranged inside the housing (61). The plugging block (63) is arranged at the same height as the pressure relief port (62). A trigger rod (64) is arranged on the plugging block (63), and a second spring (65) with a spring force greater than that of the first spring (33) is arranged on the inner bottom wall of the housing (61). The trigger rod (64) can be pushed downward when the pressure in the lower space of the cover (11) exceeds the threshold value, and drives the plugging block (63) to move synchronously to communicate the cover (11), the housing (61), and the pressure relief port (62) with each other.

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