Uniformly mixed header

Abstract

This invention relates to the technical field of boiler components, and in particular to a boiler header for uniform mixing, comprising a cylindrical body, end caps at both ends of the cylindrical body, and two mounting discs arranged along its axial direction inside the cylindrical body. The mounting discs are in close contact with and slidably fitted to the inner wall of the cylindrical body. A through hole is formed between the two axial sides of the mounting discs, and a pressure pipe with one end communicating with the through hole is provided on the mounting disc. The cylindrical body is also provided with a drive assembly for driving the two mounting discs to move closer together or further apart. The drive assembly includes a rotating shaft passing through the two end caps, a motor mounted on the end caps and connected to one end of the rotating shaft, and a compression spring sleeved on the rotating shaft and supporting the two mounting discs. The rotating shaft rotates and slides through the two mounting discs. This application has the effect of improving the uniformity of working fluid mixing.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of boiler components, in particular to a boiler header with uniform mixing. BACKGROUND

[0002] The header is a kind of pipe fitting for mixing and uniformly heating working medium of a boiler, and is an important pressure-bearing component of a power station boiler.

[0003] A boiler header structure disclosed in Chinese Patent No. CN211060095U includes a cylinder and end covers welded to both ends of the cylinder, and a plurality of header pipelines are connected through the top of the cylinder, and the boiler is provided with boiler pipelines corresponding to the header pipelines and in communication with the header pipelines.

[0004] The working medium flows into the cylinder through the boiler pipelines and the heat collection pipelines for mixing, but the mixing is spontaneous and random, and thus the working medium may not be mixed uniformly, which is obviously insufficient. SUMMARY

[0005] In order to improve the problem of possible uneven mixing of the working medium in the cylinder, the present application provides a boiler header with uniform mixing.

[0006] The boiler header with uniform mixing provided by the present application adopts the following technical solution:

[0007] The boiler header with uniform mixing includes a cylinder, end covers arranged at both ends of the cylinder, two mounting discs arranged in the cylinder along the axial direction of the cylinder, the mounting discs being in close contact with and slidingly matched with the inner wall of the cylinder, through holes being formed between the two axial sides of the mounting discs, a pressurizing pipe being arranged on the mounting disc and in communication with the through hole, and a driving assembly being arranged on the cylinder and used for driving the two mounting discs to move close to or away from each other.

[0008] By adopting the above technical solution, the driving assembly drives the two mounting discs to move away from or close to each other in the cylinder, so that the working medium in the cylinder flows under the action of the pressurizing pipe. The arrangement of the mounting disc and the pressurizing pipe increases the flow intensity of the working medium in the cylinder, thereby improving the uniformity of the working medium mixing.

[0009] Optionally, the drive assembly includes a rotating shaft that rotatably passes between the two end caps, a motor disposed on the end caps and connected to one end of the rotating shaft, and a compression spring sleeved on the rotating shaft and supporting the two mounting discs. The rotating shaft rotates and slides through the two mounting discs. A groove is formed on the rotating shaft along its length. Slider blocks that slide in the grooves are provided on opposite sides of the two mounting discs. Push rods are provided on the sliders. Two first helical grooves with opposite helical directions are formed on the inner wall of the cylinder along its axial direction. One push rod corresponds to one first helical groove and slides with it.

[0010] By adopting the above technical solution, when the mounting plates are located at both ends of the cylinder, the worker starts the motor. The motor's output shaft drives the rotating shaft to rotate, which in turn drives the slider and push rod to rotate circumferentially. Because the push rod slides into the first helical groove, it can push the mounting plates towards the midpoint of the cylinder's length. The two mounting plates approach each other and compress the compression spring. At this time, the working fluid between the opposite sides of the two mounting plates flows through the pressurization pipe to the opposite sides of the two mounting plates. When the motor stops working, the deformation force of the compression spring pushes the two mounting plates away from each other. The two push rods also move away from each other under the action of the two mounting plates. Simultaneously, under the action of the first helical groove, the push rod drives the rotating shaft to rotate in the opposite direction via the slider.

[0011] Optionally, each of the mounting plates has a clearance hole for the pressure tube on another mounting plate to slide through.

[0012] By adopting the above technical solution, the setting of the positioning hole shortens the minimum distance between the two mounting discs, which is conducive to further expanding the mixing range of the working fluid.

[0013] Optionally, both the slider and the groove have a dovetail-shaped longitudinal section.

[0014] By adopting the above technical solution, the dovetail shape helps to limit the sliding fit between the slider and the groove, thereby reducing the possibility of the slider detaching from the groove due to uneven force.

[0015] Optionally, the diameter of the pressurization pipe gradually decreases along the direction away from the corresponding mounting plate.

[0016] By adopting the above technical solution, the force of the working fluid being ejected from the smaller diameter end of the pressurized pipe when the two mounting discs are facing away from each other is enhanced, which is beneficial to improving the uniformity of the working fluid mixing.

[0017] Optionally, the distances between the axes of the two mounting discs and the corresponding pressure tubes are unequal. Two second spiral grooves are formed on the inner wall of the cylinder along its axial direction. The two second spiral grooves correspond one-to-one with the two mounting discs. A straight groove parallel to the axis of the cylinder is also formed between the opposite ends of the two second spiral grooves. A protrusion is circumferentially slidingly fitted on the outer circumferential wall of the mounting disc. The protrusion is slidably fitted with the straight groove and the corresponding second spiral groove. When the protrusion is located in the corresponding second spiral groove, the pressure tube on the mounting disc where the protrusion is located is completely outside the clearance hole on the other mounting disc.

[0018] By adopting the above technical solution, when the compression spring pushes the two mounting discs away from each other, the push rod not only drives the rotating shaft to rotate, but also drives the mounting discs to rotate through the pressurizing pipe. The two mounting discs rotate in the same direction and synchronously. At this time, the mounting discs drive the corresponding protrusions to slide along the length of the straight groove. When the protrusions move from the straight grooves to the corresponding second spiral grooves, under the action of the second spiral grooves, the protrusions drive the mounting discs to rotate through friction. The mounting discs drive the corresponding pressurizing pipes to rotate, so that when the working fluid flows out from the smaller diameter end of the pressurizing pipe, a spiral water flow can be formed, which is beneficial to further improve the uniformity of the working fluid mixing.

[0019] Optionally, a rotating sleeve is rotatably fitted onto the push rod.

[0020] By adopting the above technical solution, the design of the rotating sleeve makes the push rod move the mounting plate more smoothly.

[0021] Optionally, the two second spiral grooves have the same spiral direction.

[0022] By adopting the above technical solution, the spiral water jets ejected from the pressurized pipes on the two mounting plates have opposite directions of rotation, and the two spiral water jets collide with each other, thereby improving the mixing effect of the working fluid.

[0023] In summary, this application includes at least one of the following beneficial technical effects:

[0024] 1. The drive assembly moves two mounting discs away from each other and closer together within the cylinder, thereby causing the working fluid inside the cylinder to flow under the action of the pressurization pipe. The mounting discs and pressurization pipe increase the flow intensity of the working fluid within the cylinder, thus improving the uniformity of the working fluid mixing;

[0025] 2. When the mounting plates are located at both ends of the cylinder, the worker starts the motor. The motor's output shaft drives the rotating shaft to rotate, which in turn drives the slider and push rod to rotate circumferentially. Because the push rod is in sliding engagement with the first helical groove, it can push the mounting plates towards the midpoint of the cylinder's length. The two mounting plates approach each other and compress the compression spring. At this time, the working fluid between the opposite sides of the two mounting plates flows through the pressurization pipe to the opposite sides of the two mounting plates. When the motor stops working, the deformation force of the compression spring pushes the two mounting plates away from each other. The two push rods also move away from each other under the action of the two mounting plates. Simultaneously, under the action of the first helical groove, the push rod drives the rotating shaft to rotate in the opposite direction through the slider.

[0026] 3. When the protrusion moves from the straight groove to the corresponding second spiral groove, under the action of the second spiral groove, the protrusion drives the mounting plate to rotate through friction, and the mounting plate drives the corresponding pressurizing pipe to rotate, so that when the working fluid flows out from the smaller diameter end of the pressurizing pipe, a spiral water flow can be formed, which is beneficial to further improve the uniformity of the working fluid mixing. Attached Figure Description

[0027] Figure 1 This is a structural schematic diagram of an embodiment of this application.

[0028] Figure 2 This is a cross-sectional view of the mounting plate, pressure tube, and compression spring in an embodiment of this application.

[0029] Figure 3 This is a cross-sectional view between the first spiral groove and the second spiral groove in an embodiment of this application.

[0030] Explanation of reference numerals in the attached drawings: 1. Cylinder body; 101. First spiral groove; 102. Second spiral groove; 103. Straight groove; 2. End cap; 3. Mounting plate; 301. Through hole; 302. Clearance hole; 303. Annular groove; 4. Pressure pipe; 5. Rotating shaft; 501. Slide groove; 6. Motor; 7. Compression spring; 8. Slider; 9. Push rod. Detailed Implementation

[0031] The following is in conjunction with the appendix Figures 1-3 This application will be described in further detail.

[0032] This application discloses a boiler header for uniform mixing.

[0033] Reference Figure 1 The uniformly mixed boiler header includes a horizontally arranged cylinder 1 and end caps 2 bolted to both ends of the cylinder 1. Multiple header pipes are connected through the top of the cylinder 1. The boiler is equipped with boiler pipes that correspond one-to-one with and are connected to the header pipes. The working fluid flows into the cylinder 1 through the boiler pipes and the header pipes.

[0034] Reference Figure 2 and Figure 3Two mounting discs 3 are arranged inside the cylinder 1 along its axial direction. The mounting discs 3 are coaxial with the cylinder 1 and are in close contact with and slidingly engaged with the inner wall of the cylinder 1.

[0035] Multiple through holes 301 are circumferentially opened between the two sides of the mounting plate 3 along the axis. Multiple pressure tubes 4 are provided on the opposite side walls of the two mounting plates 3, each corresponding to one of the multiple through holes 301. One end of the pressure tube 4 is connected to the corresponding through hole 301. The distance between the axis of the two mounting plates 3 and the corresponding pressure tube 4 is not equal.

[0036] Reference Figure 2 and Figure 3 The cylinder 1 is also equipped with a driving assembly, which can drive the two mounting discs 3 to move closer to each other or further apart, so that the working fluid flows inside the cylinder 1 through the pressurization pipe 4. The movement of the mounting discs 3 and the pressurization pipe 4 enhances the flow intensity of the working fluid inside the cylinder 1, thereby improving the uniformity of the working fluid mixing.

[0037] Reference Figure 2 and Figure 3 The drive assembly includes a rotating shaft 5 coaxially rotatably passing between the two end caps 2, and a motor 6 bolted to the end caps 2 and coaxially connected to one end of the rotating shaft 5. The motor 6 is a forward and reverse rotating motor 6 and is electrically connected to the control system. A compression spring 7 is slidably sleeved on the rotating shaft 5 between the two mounting plates 3. The rotating shaft 5 rotates and slides through the two mounting plates 3.

[0038] A groove 501 is formed along the length of the rotating shaft 5. Each of the two mounting discs 3 has a slider 8 that slides within the groove 501 on opposite sides. A push rod 9 is fixedly mounted on the slider 8. Two first spiral grooves 101 with opposite spiral directions are formed on the inner wall of the cylinder 1 along its axial direction. One push rod 9 corresponds to one first spiral groove 101 and slides with it.

[0039] Reference Figure 2 and Figure 3 When the mounting plate 3 is located at the end of the cylinder 1, the worker starts the motor 6 through the control system. The output shaft of the motor 6 drives the rotating shaft 5 to rotate, and the rotating shaft 5 drives the slider 8 and the push rod 9 to rotate circumferentially.

[0040] Under the action of the first spiral groove 101, the push rod 9 drives the slider 8 to move towards the midpoint of the length of the rotating shaft 5, so that the two mounting plates 3 move closer to each other. The two mounting plates 3 cooperate with the compression spring 7 to achieve compression. At this time, the working fluid between the opposite sides of the two mounting plates 3 flows to the opposite sides of the two mounting plates 3 through the pressure pipe 4.

[0041] Reference Figure 2 and Figure 3When the motor 6 stops, the deformation force of the compression spring 7 pushes the two mounting plates 3 away from each other. Under the sliding cooperation of the first spiral groove 101 and the push rod 9, the push rod 9 drives the rotating shaft 5 to rotate in the opposite direction through the slider 8. At this time, the working fluid on the opposite side of the two mounting plates 3 flows back to the opposite side of the two mounting plates 3 through the pressurization pipe 4.

[0042] Reference Figure 2 A rotating sleeve (not shown in the figure) is provided on the push rod 9. When the push rod 9 pushes the mounting plate 3 to move, the rotating sleeve converts the sliding friction between the push rod 9 and the mounting plate 3 into rolling friction, which helps to improve the smoothness of the push rod 9 pushing the mounting plate 3 to move.

[0043] Reference Figure 3 and Figure 1 Both the slider 8 and the slide groove 501 have a dovetail-shaped longitudinal section. The dovetail shape can limit the sliding fit between the slider 8 and the slide groove 501, reducing the possibility of the slider 8 disengaging from the slide groove 501.

[0044] Reference Figure 2 and Figure 3 The diameter of the pressurization pipe 4 gradually decreases along the direction away from the corresponding mounting plate 3, thereby enhancing the strength of the working fluid flowing back from the opposite sides of the two mounting plates 3 to the opposite sides of the two mounting plates 3, and further improving the uniformity of the working fluid mixing.

[0045] Reference Figure 2 and Figure 3 Each mounting plate 3 has multiple circumferential clearance holes 302 between its two axial sides. These clearance holes 302 are used to allow the pressure pipe 4 on another mounting plate 3 to slide through. The clearance holes 302 shorten the minimum distance between the two mounting plates 3, thereby further expanding the mixing range of the working fluid inside the cylinder 1.

[0046] Reference Figure 2 and Figure 3 Four second spiral grooves 102 are provided on the inner wall of the cylinder 1 along its axial direction. Two second spiral grooves 102 correspond to one mounting plate 3 and are symmetrical about its axis. A straight groove 103 parallel to the axis of the cylinder 1 is also opened between the opposite ends of the second spiral grooves 102 corresponding to different mounting plates 3.

[0047] The outer circumferential wall of the mounting plate 3 has an annular groove 303. Two protrusions (not shown in the figure) slide in the annular groove 303. The two protrusions correspond one-to-one with the two second spiral grooves 102. The protrusions extend out of the sliding groove 501 and into the second spiral groove 102. The protrusions slide in the straight groove 103 and the corresponding second spiral groove 102.

[0048] Reference Figure 2 and Figure 3When the protrusion is located in the corresponding second spiral groove 102, the pressure tube 4 on the corresponding mounting plate 3 is completely outside the clearance hole 302 on the other mounting plate 3.

[0049] Reference Figure 2 and Figure 3 When the compression spring 7 pushes the two mounting discs 3 away from each other, the push rod 9 not only drives the rotating shaft 5 to rotate, but also drives the mounting discs 3 to rotate through the pressure pipe 4. The two mounting discs 3 rotate in the same direction and synchronously. At this time, the mounting discs 3 drive the corresponding protrusion to slide along the length direction of the straight groove 103.

[0050] When the protrusion moves from the straight groove 103 to the corresponding second spiral groove 102, under the action of the second spiral groove 102, the protrusion drives the mounting plate 3 to rotate through friction. The mounting plate 3 drives the corresponding multiple pressurizing pipes 4 to rotate, so that when the working fluid flows out from the smaller diameter end of the pressurizing pipe 4, a spiral water flow can be formed, which is beneficial to further improve the uniformity of the working fluid mixing.

[0051] When the push rod 9 pushes the two mounting discs 3 closer together, under the action of the second spiral groove 102, the protrusion drives the mounting disc 3 to rotate through friction with the annular groove 303 until the protrusion moves from the second spiral groove 102 into the straight groove 103. Then the protrusion moves along the length of the straight groove 103. In this way, the push rod 9 drives the two mounting discs 3 to rotate synchronously and in the same direction through the pressure tube 4, and the protrusion rotates relative to the mounting disc 3 in the corresponding annular groove 303.

[0052] Reference Figure 2 and Figure 3 Figure 2 Figure 3 The spiral directions of the second spiral groove 102 corresponding to different mounting discs 3 are the same. When the two mounting discs 3 rotate, the spiral water jets sprayed from the smaller diameter end of the pressurizing pipe 4 flow in opposite directions. The two spiral water jets collide and mix with each other, further improving the uniformity of the working fluid mixing.

[0053] The implementation principle of a uniformly mixed boiler header in this application embodiment is as follows:

[0054] When the mounting plate 3 is located at the end of the cylinder 1, the worker starts the motor 6 through the control system. The output shaft of the motor 6 drives the rotating shaft 5 to rotate, and the rotating shaft 5 drives the slider 8 and the push rod 9 to rotate circumferentially. Under the action of the first spiral groove 101, the push rod 9 drives the slider 8 to move towards the midpoint of the length of the cylinder 1, and the two mounting plates 3 move closer to each other and compress the compression spring 7. In addition, under the action of the second spiral groove 102, the protrusion drives the mounting plate 3 to rotate circumferentially. During this process, the working fluid on the opposite sides of the two mounting plates 3 flows through the pressurization pipe 4 to the space between the opposite sides of the two mounting plates 3.

[0055] Until the protrusion moves into the straight groove 103, at this time, the pressurizing pipe 4 is inserted into the corresponding relief hole 302, and the push rod 9 drives the two mounting plates 3 to rotate synchronously and in the same direction through the pressurizing pipe 4. The two mounting plates 3 continue to move closer to each other, and the mounting plates 3 and the protrusion rotate relative to each other. During this process, when the working fluid flows out from the smaller end of the pressurizing pipe 4, a spiral water flow is formed.

[0056] When motor 6 stops, the deformation force of compression spring 7 pushes the two mounting plates 3 away from each other. At this time, under the action of the first spiral groove 101, push rod 9 drives slider 8 away from the midpoint of the length of cylinder 1, and also drives rotating shaft 5 to reverse. At this time, the two protrusions move away from each other, and push rod 9 also drives the two mounting plates 3 to rotate synchronously and in the same direction through pressure pipe 4, and the mounting plates 3 and the corresponding protrusions rotate relative to each other.

[0057] Until the protrusion moves from the straight groove 103 into the second spiral groove 102, at which point the protrusion and the mounting plate 3 remain relatively stationary. Under the action of the second spiral groove 102, the protrusion drives the mounting plate 3 to rotate circumferentially on the rotating shaft 5. The mounting plate 3 drives the pressure pipe 4 to rotate. During this process, the working fluid between the opposite sides of the two mounting plates 3 flows to the opposite sides of the two mounting plates 3 through the pressure pipe 4.

[0058] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A boiler header for uniform mixing, comprising a cylindrical body (1) and end caps (2) disposed at both ends of the cylindrical body (1), characterized in that: Two mounting discs (3) are arranged along the axial direction inside the cylinder (1). The mounting discs (3) are in close contact with and slide against the inner wall of the cylinder (1). A through hole (301) is opened between the two sides of the mounting disc (3) along the axial direction. A pressure tube (4) is provided on the mounting disc (3) with one end communicating with the through hole (301). The cylinder (1) is also provided with a driving assembly for driving the two mounting discs (3) to move closer to each other or further away from each other. Each mounting disc (3) has a clearance hole (302) for the pressure tube (4) on the other mounting disc (3) to slide through. The distance between the axis of the two mounting discs (3) and the corresponding pressure tube (4) is not equal. Two second spiral grooves (102) are formed on the inner wall along its axial direction. The two second spiral grooves (102) correspond one-to-one with the two mounting discs (3). A straight groove (103) parallel to the axis of the cylinder (1) is also formed between the opposite ends of the two second spiral grooves (102). A protrusion is circumferentially slidingly fitted on the outer circumferential wall of the mounting disc (3). The protrusion is slidably fitted with the straight groove (103) and the corresponding second spiral groove (102). When the protrusion is located in the corresponding second spiral groove (102), the pressure tube (4) on the mounting disc (3) where the protrusion is located is completely outside the clearance hole (302) on the other mounting disc (3).

2. The boiler header with uniform mixing according to claim 1, characterized in that: The drive assembly includes a rotating shaft (5) that rotates between the two end caps (2), a motor (6) that is mounted on the end caps (2) and connected to one end of the rotating shaft (5), and a compression spring (7) that is sleeved on the rotating shaft (5) and supports the two mounting discs (3). The rotating shaft (5) rotates and slides through the two mounting discs (3). A groove (501) is opened on the rotating shaft (5) along its length direction. A slider (8) that slides in the groove (501) is provided on the opposite side of the two mounting discs (3). A push rod (9) is provided on the slider (8). Two first spiral grooves (101) with opposite spiral directions are opened on the inner wall of the cylinder (1) along its axial direction. One push rod (9) corresponds to one first spiral groove (101) and slides with it.

3. The boiler header with uniform mixing according to claim 2, characterized in that: The longitudinal sections of both the slider (8) and the groove (501) are dovetail-shaped.

4. The boiler header with uniform mixing according to claim 1, characterized in that: The diameter of the pressurization pipe (4) gradually decreases along the direction away from the corresponding mounting plate (3).

5. The boiler header with uniform mixing according to claim 2, characterized in that: The push rod (9) is rotatably fitted with a rotating sleeve.

6. The boiler header with uniform mixing according to claim 1, characterized in that: The two second spiral grooves (102) have the same spiral direction.

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