A water wall lower header

Abstract

The utility model relates to a boiler accessory technical field, especially a kind of water-cooled wall lower header, including lower header body, disc, spiral plate, spline shaft and drive assembly B, conduit A and conduit B are set on lower header body, one blow-off pipe is respectively arranged in the both ends of lower header body;Disc rotation is set in blow-off pipe, several receiving grooves are arranged in the annular array around its axle center on the camber surface of disc, drive assembly A that drives disc intermittent rotation is set on blow-off pipe;Spiral plate is set on the inner wall of lower header body;Spline shaft is set in the inside of lower header body and is coaxially rotationally connected with it, sleeve is set on spline shaft, sleeve is slidably connected along the axial direction of spline shaft, scraper is set on sleeve, scraper is slidably connected with spiral plate;Drive assembly B is set on lower header body and drives spline shaft rotation.The utility model has the function of cleaning and decontaminating the inside of lower header on the basis of not stopping, and it is simple and convenient to operate.

Description

Technical Field

[0001] This utility model relates to the field of boiler accessories technology, and in particular to a water-cooled wall lower header. Background Technology

[0002] The lower header, usually connected below the upper header, is another important component of a waste heat boiler. It typically consists of downcomers, a base plate, and other parts. Its main function is to collect the liquid water entering from the upper header, then draw it out of the boiler and recover the heat from it.

[0003] Chinese patent CN216693490U discloses a fixing structure for the lower header of a boiler water-cooled wall. The mounting mechanism consists of an annular fixing member and a mounting seat. The annular fixing member is welded to the outer wall of the boiler shell, and the mounting seat is slidably connected to an annular groove on the outer wall of the annular fixing member via a slider. During use, the mounting seat can be pushed to slide on the outer wall of the annular fixing member to adjust the position of the mounting seat, making it easy to install and fix the mounting seat with inclined surfaces of different angles.

[0004] However, the device still has shortcomings: if a lot of impurities accumulate inside the lower header, it is necessary to manually open the cover for cleaning, which is time-consuming and labor-intensive, and the machine needs to be stopped during manual cleaning, which affects production. Utility Model Content

[0005] The purpose of this invention is to address the problems existing in the background technology by proposing a water-cooled wall lower header.

[0006] The technical solution of this utility model is as follows: a water-cooled wall lower manifold, including a lower manifold body, a conduit A and a conduit B communicating with the interior of the lower manifold body, and a drain pipe communicating with the interior of the lower manifold body respectively on the side walls at both ends of the lower manifold body.

[0007] A disc is rotatably installed inside a sewage pipe. Several receiving grooves are arranged in a ring array around the axis on the arc surface of the disc. A drive component A is installed on the sewage pipe to drive the disc to rotate intermittently.

[0008] Spiral plate, the spiral plate is set on the inner wall of the lower header body and is coaxial with it;

[0009] A spline shaft is located inside the lower header body and is rotatably connected to it. A sliding sleeve is fitted on the spline shaft and is slidably connected to it along the axial direction of the spline shaft. A scraper is provided on the sliding sleeve and is slidably connected to the spiral plate.

[0010] And drive component B, which is mounted on the lower header body and drives the spline shaft to rotate.

[0011] Preferably, the lower header body includes a cylinder, end caps, flange A, and bolts. There are two end caps, and the two end caps are respectively connected to the corresponding ends of the cylinder through flange A and bolts.

[0012] Preferably, a discharge hole with a downward opening and connected to the internal channel is provided at each end of the cylinder, and the sewage pipe covers the outside of the discharge hole on the corresponding side.

[0013] Preferably, a guide cone is coaxially arranged on the end cap, and the outlet of the guide cone is inclined toward the discharge hole.

[0014] Preferably, a hollow cylindrical tube coaxial with the end cap is provided, and an annular chamber coaxial with the hollow cylindrical tube is provided inside the hollow cylindrical tube. A pressure sensor is provided in the annular chamber. An annular gasket is provided at the end of the hollow cylindrical tube away from the end cap. The inner diameter of the annular gasket is smaller than the outer diameter of the sliding sleeve. The annular gasket is inserted into the annular chamber and contacts the detection end of the pressure sensor. A PLC controller is provided on the lower header body. The PLC controller is electrically connected to the pressure sensor and drive assembly A and drive assembly B.

[0015] Preferably, the main body of the scraper is located within the segment of the spiral plate and is slidably connected to the end faces of the spiral plates on both sides of the segment.

[0016] Preferably, a flange B is provided at the end of conduit A and conduit B away from the lower header body.

[0017] Compared with the prior art, the present invention has the following beneficial technical effects:

[0018] By installing a drain pipe with a rotating disc inside, and using the receiving groove on the disc's arc surface to collect impurities and dirt, the disc's rotation allows for the intermittent discharge of dirt into the lower header. A cooperative structure consisting of a spiral plate, splined shaft, sliding sleeve, and scraper allows the splined shaft to rotate, which in turn drives the sliding sleeve. The sliding sleeve is then limited by the scraper and spiral plate, causing the spiral plate to move along the spiral direction while following the sliding sleeve's rotation. This gradually pushes the dirt deposited in the spiral channel of the cylinder to the discharge hole, where the rotating disc directly discharges the dirt without requiring shutdown, saving time and effort. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of one embodiment of the present utility model;

[0020] Figure 2 This is a schematic diagram of the internal structure of the sewage pipe;

[0021] Figure 3 This is a schematic diagram of the internal structure of the cylinder;

[0022] Figure 4This is a schematic diagram of the connection structure between the end cap and the scraper.

[0023] Figure 5 This is a schematic diagram of the catheter structure.

[0024] Reference numerals: 1. Cylinder; 2. Guide tube A; 201. Slot; 202. Ring; 203. Locking block; 204. Twist; 3. Guide tube B; 4. Drain pipe; 41. Circular groove; 5. Disc; 51. Receiving groove; 6. Motor A; 7. Spiral plate; 8. End cap; 9. Splined shaft; 10. Sliding sleeve; 11. Scraper; 12. Motor B; 13. Guide cone; 14. Hollow column tube; 15. Pressure sensor; 16. Annular gasket. Detailed Implementation

[0025] Example 1

[0026] like Figures 1-4As shown, this utility model proposes a water-cooled wall lower header, including a lower header body, a disc 5, a spiral plate 7, a splined shaft, and a drive assembly B. The lower header body is provided with conduits A2 and B3 communicating with its interior, and a drain pipe 4 communicating with its interior is provided on the side walls at both ends of the lower header body. The lower header body includes a cylinder 1, end caps 8, flanges A, and bolts. There are two end caps 8, which are respectively connected to the corresponding ends of the cylinder 1 via flanges A and bolts. Each end of the cylinder 1 has a downward-facing discharge hole communicating with its internal channel, and the drain pipe 4 covers the outside of the corresponding discharge hole. A guide cone 13 is coaxially provided on the end cap 8, with the outlet of the guide cone 13 inclined towards the discharge hole. A circular groove 41 communicating with the drain pipe 4 is provided inside the drain pipe 4. A disc 5 is placed in the circular groove 41 and is rotatably connected to it on the same axis. Four receiving grooves 51 are arranged in a ring array around the axis of the disc 5 on the arc surface. A drive assembly A is provided on the drain pipe 4 to drive the disc 5 to rotate intermittently. The drive assembly A includes, but is not limited to, a motor A6 and a coupling A. The body of the motor A6 is placed on the drain pipe 4, and the output end of the motor A6 is connected to the central axis of the disc 5 through the coupling. A spiral plate 7 is placed on the inner wall of the lower header body and is coaxial with it. A spline shaft 9 is placed inside the lower header body and is rotatably connected to it on the same axis. A sliding sleeve 10 is fitted on the spline shaft 9 and is slidably connected to it along the axial direction of the spline shaft 9. A scraper 11 is provided on the sliding sleeve 10 and is slidably connected to the spiral plate 7. The body of the scraper 11 is located in the section of the spiral plate 7 and is slidably connected to the end faces of the spiral plates 7 on both sides of the section and the inner wall of the cylinder 1. A hollow cylindrical tube 14, coaxial with the end cover 8, is provided on the end cover 8. An annular chamber, also coaxial with the hollow cylindrical tube 14, is provided inside the annular chamber. A pressure sensor 15 is installed within the annular chamber. An annular gasket 16 is provided at the end of the hollow cylindrical tube 14 furthest from the end cover 8. The inner diameter of the annular gasket 16 is smaller than the outer diameter of the sliding sleeve 10. The annular gasket 16 is inserted into the annular chamber and contacts the detection end of the pressure sensor 15. A PLC controller is provided on the lower header body. The PLC controller is electrically connected to the pressure sensor 15, as well as drive assembly A and drive assembly B. Drive assembly B is located on the lower header body and includes, but is not limited to, a motor B12 and a coupling B. The motor B12 is mounted on one of the end covers 8. The output end of the motor B12 is connected to a splined shaft 9 via a coupling, and the motor B12 drives the splined shaft 9 to rotate.

[0027] In this embodiment, when the inside of the cylinder 1 needs to be cleaned (or the interval of the self-starting cleaning program is set), the motor B12 is started. The motor B12 drives the spline shaft 9 to rotate, thereby driving the sliding sleeve 10 to rotate. When the sliding sleeve 10 rotates, due to the sliding connection between the scraper 11 and the spiral plate 7, the scraper 11 rotates and advances along the spiral direction of the spiral plate 7, thereby pushing the impurities accumulated in the spiral groove formed by the spiral plate 7 toward the discharge hole on one side. When the sliding sleeve 10 squeezes the annular liner 16, the dirt and impurities in the forward direction of the scraper 11 are pushed into the discharge hole and fall into the receiving groove 51. At this time, the pressure sensor 15 detects the pressure signal, and the pressure signal is fed back to the PLC controller. The PLC controller controls the motor A6 to start, and the motor A6 drives the disk 5 on this side to rotate, thereby gradually discharging the dirt through the rotating receiving groove. The next time the dirt is cleaned, the motor B12 drives the spline shaft 9 to rotate in the opposite direction, so that the dirt in the spiral channel can be discharged from the drain pipe 4 at the other end.

[0028] Example 2

[0029] like Figure 1 and Figure 5 As shown, the water-cooled wall lower header proposed in this utility model, compared with embodiment one, has a flange B respectively provided at the end of the conduit A2 and conduit B3 away from the lower header body. The flange B includes, but is not limited to, a locking block 203 and a lever 204. A plurality of locking grooves 201 are arranged in a ring array around the axis of the conduit A2 (or conduit B3). A ring 202 is fitted on the conduit A2 (or conduit B3) and rotatably connected to it on the same axis. A plurality of through holes are arranged in a ring array around the axis of the ring 202. A sliding groove is arranged on the ring 202 along its radial direction. A spring rod is arranged in the sliding groove. One end of the locking block 203 is inserted into the sliding groove and connected to the movable end of the spring rod. The other end of the locking block 203 is locked into the corresponding side locking groove 201. The lever 204 is slidably connected to the ring 202 and connected to the locking block 203.

[0030] In this embodiment, when connecting the device to the boiler water pipe, the lever 204 on the guide tube A2 or guide tube B3 of the device is turned to retract the locking block 203 into the slide groove. At this time, the spring rod retracts and stores energy, and the locking block 203 releases the rotation limit between the ring 202 and the guide tube. The ring 202 is rotated to align with the flange hole on the boiler water pipe. Then the lever 204 is released to allow the locking block 203 to re-engage in the corresponding slot 201. This structure can avoid misalignment between the flange hole on the external pipe and the flange hole on the guide tube, thus improving assembly efficiency.

[0031] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited thereto. Various changes can be made within the scope of knowledge possessed by those skilled in the art without departing from the spirit of the present invention.

Claims

1. A water-cooled wall lower header, characterized in that, include: The lower header body is provided with a conduit A (2) and a conduit B (3) that communicate with its interior. A drain pipe (4) that communicates with its interior is provided on the side walls at both ends of the lower header body. The disc (5) is rotatably installed inside the drain pipe (4). Several receiving grooves (51) are arranged in a ring array around its axis on the arc surface of the disc (5). A drive component A is installed on the drain pipe (4) to drive the disc (5) to rotate intermittently. Spiral plate (7) is set on the inner wall of the lower header body and is coaxial with it; Spline shaft (9) is located inside the lower header body and is coaxially rotatably connected to it. A sliding sleeve (10) is fitted on the spline shaft (9). The sliding sleeve (10) is slidably connected to the spline shaft (9) along its axial direction. A scraper (11) is provided on the sliding sleeve (10). The scraper (11) is slidably connected to the spiral plate (7). And drive component B, which is set on the lower header body and drives the spline shaft (9) to rotate.

2. The water-cooled wall lower header according to claim 1, characterized in that, The lower header body includes a cylinder (1), end caps (8), flanges A and bolts. There are two end caps (8), and the two end caps (8) are respectively connected to the corresponding ends of the cylinder (1) through flanges A and bolts.

3. A water-cooled wall lower header according to claim 2, characterized in that, The cylinder (1) has a discharge hole with an opening facing downward and connected to its internal channel at both ends, and the sewage pipe (4) covers the outside of the discharge hole on the corresponding side.

4. A water-cooled wall lower header according to claim 3, characterized in that, A guide cone (13) is coaxially arranged on the end cap (8), and the outlet of the guide cone (13) is inclined toward the discharge hole.

5. A water-cooled wall lower header according to claim 2, characterized in that, A hollow cylindrical tube (14) is provided on the end cap (8) and is coaxial with it. An annular chamber is provided inside the hollow cylindrical tube (14) and is coaxial with it. A pressure sensor (15) is provided in the annular chamber. An annular gasket (16) is provided at the end of the hollow cylindrical tube (14) away from the end cap (8). The inner diameter of the annular gasket (16) is smaller than the outer diameter of the sliding sleeve (10). The annular gasket (16) is inserted into the annular chamber and contacts the detection end of the pressure sensor (15). A PLC controller is provided on the lower header body. The PLC controller is electrically connected to the pressure sensor (15) and drive components A and B.

6. A water-cooled wall lower header according to claim 1, characterized in that, The main body of the scraper (11) is located in the section of the spiral plate (7) and is slidably connected to the end faces of the spiral plates (7) on both sides of the section.

7. A water-cooled wall lower header according to claim 1, characterized in that, A flange B is provided at the end of conduit A(2) and conduit B(3) away from the lower header body.

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