Air preheater clogging dredging device

Abstract

The utility model relates to an air preheater clogging dredging device which comprises a working table, a supporting frame used for lifting a preheater shell is arranged at one end of the working table, and a dredging mechanism used for dredging clogging of a thin-wall steel pipe set is arranged at the other end of the working table. The dredging mechanism comprises a supporting plate which is located above the workbench and is adjustable in height, an xy cross-shaped electric linear sliding table is installed on the top face of the supporting plate, a vertical plate is vertically and fixedly connected to an upper sliding block of the xy cross-shaped electric linear sliding table, and dredging rods which can be correspondingly inserted into the thin-wall steel pipes are vertically and fixedly connected to the vertical plate. Through the combined design of the supporting frame, the dredging mechanism and the dust collector, the thin-wall steel pipe blocked by dust can be conveniently and rapidly dredged, the dredging and cleaning difficulty is reduced, and the device has certain application and popularization value.

Description

Technical Field

[0001] The utility model relates to a dredging device, in particular to a ash-blocking dredging device for an air preheater. Background Art

[0002] Air preheater, also referred to as air preheater, is a preheating device that improves the heat exchange performance of the boiler and reduces heat loss. The function of the air preheater is to transfer the heat carried by the flue gas discharged from the tail flue of the boiler to the air before entering the boiler through the heat sink, and preheat the air to a certain temperature. Currently, the commonly used air preheaters are mainly tubular air preheaters and rotary air preheaters.

[0003] The existing tubular air preheater includes a preheater shell, the left side of the preheater shell is connected to the smoke inlet hood, the right side of the preheater shell is connected to the smoke outlet hood, the bottom of the preheater shell is connected to the air inlet hood, and the top of the preheater shell is connected to the air outlet hood. A thin-walled steel pipe group consisting of several parallel thin-walled steel pipes is arranged in the preheater shell, and the smoke enters the thin-walled steel pipe group from the smoke inlet hood, flows through each thin-walled steel pipe, and then is output through the smoke outlet hood. Correspondingly, the air enters from the air inlet hood and circulates in the shell, completes heat conduction with the thin-walled steel pipe, and the preheated air is output through the air outlet hood.

[0004] Since there is a lot of dust in the flue gas, the thin-walled steel pipe will be blocked by dust after a period of use, thus affecting the normal circulation of the flue gas, and correspondingly directly affecting the air preheating effect. When the thin-walled steel pipe is blocked by dust, there is currently no corresponding unblocking tool on the market, and it is very inconvenient to unblock the blockage.

[0005] In order to solve the above technical problems, the maintenance team proposed an air preheater dust blockage unblocking device based on the structural characteristics of the tubular air preheater, which can effectively clear the blockage during maintenance and reduce the difficulty of unblocking and cleaning. Utility Model Content

[0006] The utility model aims at the deficiencies of the prior art and provides a device for clearing dust blockage of an air preheater.

[0007] The utility model is realized through the following technical scheme, and provides an air preheater ash blockage unblocking device, including a workbench, a support frame for lifting the preheater shell is provided at one end of the workbench, and a unblocking mechanism for unblocking the blockage of a thin-walled steel pipe group is provided at the other end of the workbench; the unblocking mechanism includes a support plate located above the workbench and having adjustable height, an xy cross electric linear slide is installed on the top surface of the support plate, a vertical plate is vertically fixed to the upper slider of the xy cross electric linear slide, and unblocking rods that can be respectively inserted into each thin-walled steel pipe are vertically fixed to the vertical plate.

[0008] Preferably, in order to achieve lifting and lowering adjustment of the pallet, a lifting cylinder is arranged between the pallet and the workbench, the cylinder body of the lifting cylinder is fixed to the workbench, and the piston rod of the lifting cylinder is fixed to the pallet, and the lifting cylinder provides power to drive the pallet to rise and fall.

[0009] Preferably, in order to increase the stability of the pallet when it is lifted, two guide rods are fixed on the bottom surface of the pallet, the lifting cylinder is located between the two guide rods, each guide rod passes through the workbench, and a through hole is provided on the workbench for each guide rod to pass through. The two guide rods can play a guiding role, thereby increasing the stability of the pallet when it is lifted.

[0010] Preferably, a limit stopper is provided at the lower end of each guide rod.

[0011] Preferably, in order to facilitate unblocking, the left side of the preheater shell is welded and fixed with a smoke inlet hood, and the right side of the preheater shell is detachably connected to a smoke outlet hood. When the smoke outlet hood is removed, the unblocking rod can be easily inserted into the thin-walled steel pipe group.

[0012] Preferably, the smoke hood and the preheater housing are fixed by bolt connection, and a sealing gasket is installed at the connection between the smoke hood and the preheater housing to improve the sealing effect.

[0013] Preferably, in order to facilitate the discharge of dust into the smoke hood, an ash discharge port is provided on the smoke hood, a vacuum cleaner is provided under the workbench, and a vacuum pipe of the vacuum cleaner passes through the workbench and is sleeved on the ash discharge port. When the tubular air preheater is in normal use, the vacuum pipe is separated from the ash discharge port and the ash discharge port is blocked by the cover plate.

[0014] Preferably, the support frame includes a placement plate, which is connected to the workbench through a support rod, and the preheater shell is placed on the placement plate; a plurality of ear plates are fixed to the preheater shell, and connecting screws corresponding to and passing through each ear plate are fixed to the placement plate, and the connecting screws are fixed by nuts after passing through the ear plates.

[0015] Preferably, in order to increase the structural stability, the vertical plate and the upper slider are connected via an oblique brace, one end of the oblique brace is fixedly connected to the upper slider, and the other end is fixedly connected to the vertical plate.

[0016] Preferably, support legs are fixedly connected to the lower surface of the workbench, and the workbench is elevated by the support legs.

[0017] The beneficial effects of the utility model are:

[0018] Through the combined design of the support frame, the dredging mechanism and the vacuum cleaner, the present application can dredge thin-walled steel pipes blocked by dust more conveniently and quickly, reduce the difficulty of dredging and cleaning, and has certain promotion and utilization value. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is the front view of the utility model;

[0020] Figure 2 This is a front view of the utility model in the working state before dredging;

[0021] Figure 3 This is a front view of the utility model in the working state when dredging;

[0022] Figure 4 This is a schematic diagram of the connection relationship between the gas outlet hood and the preheater shell of the utility model;

[0023] As shown in the figure:

[0024] 1. Workbench, 2. Support rod, 3. Placement plate, 4. Connecting screw, 5. Dust suction pipe, 6. Support leg, 7. Vacuum cleaner, 8. Lifting cylinder, 9. Support plate, 10. XY cross electric linear slide, 11. Upper slide block, 12. Diagonal support, 13. Vertical plate, 14. Clearing rod, 15. Guide rod, 16. Through hole, 17. Limit stopper, 18. Preheater shell, 19. Smoke inlet hood, 20. Ash discharge port, 21. Thin-walled steel pipe, 22. Smoke outlet. DETAILED DESCRIPTION

[0025] In order to clearly illustrate the technical features of this solution, this solution is described below through a specific implementation method.

[0026] like Figure 1-4 As shown, the utility model includes a workbench 1, a support frame for lifting the preheater housing 18 is provided at one end of the workbench 1, and a dredging mechanism for dredging the blockage of the thin-walled steel pipe group is provided at the other end of the workbench 1. The dredging mechanism includes a support plate 9 located above the workbench 1 and having an adjustable height, an xy cross electric linear slide 10 is installed on the top surface of the support plate 9, and the xy cross electric linear slide 10 is an existing structure, and a vertical plate 13 is vertically fixed to the upper slider 11 of the xy cross electric linear slide 10, and a dredging rod 14 that can be correspondingly inserted into each thin-walled steel pipe 21 is vertically fixed to the vertical plate 13.

[0027] In this embodiment, in order to achieve the lifting and lowering adjustment of the pallet 9, a lifting cylinder 8 is arranged between the pallet 9 and the workbench 1, the cylinder body of the lifting cylinder 8 is fixed to the workbench 1, and the piston rod of the lifting cylinder 8 is fixed to the pallet 9, and the lifting cylinder 8 provides power to drive the pallet 9 to rise and fall. Furthermore, in order to increase the stability of the pallet 9 during lifting and lowering, two guide rods 15 are fixed to the bottom surface of the pallet 9, and the lifting cylinder 8 is located between the two guide rods 15, each guide rod 15 passes through the workbench 1, and a through hole 16 is provided on the workbench 1 for each guide rod 15 to pass through. The two guide rods 15 can play a guiding role, thereby increasing the stability of the pallet 9 during lifting and lowering. Furthermore, a limit stopper 17 is provided at the lower end of each guide rod 15.

[0028] In this embodiment, in order to facilitate dredging, Figure 4 As shown, the left side of the preheater housing 18 is welded and fixed with a smoke inlet hood 19, and the right side of the preheater housing 18 is detachably connected to a smoke outlet hood 22. When the smoke outlet hood 22 is removed, the dredging rod 14 can be easily inserted into the thin-walled steel pipe group. Furthermore, the smoke outlet hood 22 and the preheater housing 18 are fixed by bolts, and a sealing gasket is installed at the connection between the smoke outlet hood 22 and the preheater housing 18 to improve the sealing effect.

[0029] In this embodiment, in order to facilitate the discharge of dust from the smoke hood 19, an ash discharge port 20 is provided on the smoke hood 19, and a dust collector 7 is provided under the workbench 1. The dust suction pipe 5 of the dust collector 7 passes through the workbench 1 and is sleeved on the ash discharge port 20. When the tubular air preheater is in normal use, the dust suction pipe 5 is separated from the ash discharge port 20 and the ash discharge port 20 is blocked by the cover plate.

[0030] In this embodiment, the support frame includes a placement plate 3, which is connected to the workbench 1 through a support rod 2, and the preheater housing 18 is placed on the placement plate 3. Further, in order to fix the preheater housing 18 on the support frame, a plurality of ear plates 23 are fixed to the preheater housing 18, and a connecting screw 4 corresponding to each ear plate 23 is fixed to the placement plate 3, and the connecting screw 4 passes through the ear plate 23 and is fixed by a nut.

[0031] In this embodiment, in order to increase the structural stability, the vertical plate 13 and the upper slider 11 are connected via a diagonal brace 12 , one end of the diagonal brace 12 is fixedly connected to the upper slider 11 , and the other end is fixedly connected to the vertical plate 13 .

[0032] In this embodiment, support legs 6 are fixed to the lower surface of the workbench 1 , and the workbench 1 is elevated by the support legs 6 .

[0033] During the inspection and maintenance process, when the tubular air preheater needs to be unblocked, the tubular air preheater is separated from the corresponding connecting pipes, and after the smoke hood 22 is removed, the tubular air preheater is hoisted onto the support frame and fixed firmly, and the dust suction pipe 5 is connected to the dust discharge port 20. The height of the unblocking rod 14 is adjusted by the lifting cylinder 8, the front and rear position adjustment of the unblocking rod 14 can be achieved by the x electric linear slide, and the left and right position adjustment of the unblocking rod 14 can be achieved by the y electric linear slide. The unblocking rod 14 is aligned with the thin-walled steel pipe group through the height adjustment and the front, rear, left and right adjustment. Finally, the unblocking rod 14 is gradually approached and inserted into the thin-walled steel pipe under the drive of the y electric linear slide. As the unblocking rod 14 moves forward, the blocked dust in the thin-walled steel pipe is pushed out to unblock the thin-walled steel pipe, and the pushed out dust is sucked into the dust collector 7. After the unblocking is completed, the unblocking rod 14 is returned to its original position, the tubular air preheater is lifted off the support frame, the smoke hood 22 is reinstalled, and the tubular air preheater is installed back to its original position.

[0034] The present application, through the combined design of the support frame, the dredging mechanism and the vacuum cleaner 7, can dredge the thin-walled steel pipe blocked by dust more conveniently and quickly, reduce the difficulty of dredging and cleaning, and has certain promotion and use value.

[0035] Of course, the above description is not limited to the above examples. The technical features not described in the present invention can be achieved by or by adopting the existing technology, which will not be repeated here. The above embodiments and drawings are only used to illustrate the technical scheme of the present invention and are not limitations of the present invention. The present invention is described in detail with reference to the preferred implementation methods. Ordinary technicians in this field should understand that the changes, modifications, additions or substitutions made by ordinary technicians in this technical field within the essential scope of the present invention do not deviate from the purpose of the present invention and should also fall within the scope of protection of the claims of the present invention.

Claims

1. An air preheater ash blockage dredging device, characterized in that: It comprises a workbench, at one end of which a support frame for lifting a preheater shell is provided, and at the other end of the workbench a dredging mechanism for dredging blockages in a thin-walled steel pipe group is provided; the dredging mechanism comprises a support plate which is located above the workbench and can be adjusted in height, an xy cross electric linear slide is installed on the top surface of the support plate, a vertical plate is vertically fixed to the upper slider of the xy cross electric linear slide, and dredging rods which can be respectively inserted into each thin-walled steel pipe are vertically fixed to the vertical plate.

2. The device for clearing dust blockage in air preheater according to claim 1, characterized in that: A lifting cylinder is arranged between the supporting plate and the workbench, a cylinder body of the lifting cylinder is fixed to the workbench, and a piston rod of the lifting cylinder is fixed to the supporting plate.

3. The device for clearing dust blockage in air preheater according to claim 2, characterized in that: Two guide rods are fixedly connected to the bottom surface of the supporting plate, the lifting cylinder is located between the two guide rods, each guide rod passes through the workbench, and a through hole is provided on the workbench for each guide rod to pass through.

4. The device for clearing dust blockage in air preheater according to claim 3, characterized in that: A limit stopper is arranged at the lower end of each guide rod.

5. The device for clearing dust blockage in air preheater according to claim 1, characterized in that: The left side of the preheater shell is welded and fixed with a smoke inlet hood, and the right side of the preheater shell is detachably connected with a smoke outlet hood.

6. The device for clearing dust blockage in air preheater according to claim 5, characterized in that: The smoke hood and the preheater shell are fixed by bolts.

7. The device for clearing dust blockage in air preheater according to claim 6, characterized in that: An ash discharging port is arranged on the smoke inlet hood, and a dust collector is arranged under the workbench. A dust suction pipe of the dust collector passes through the workbench and is sleeved on the ash discharging port.

8. The device for clearing dust blockage in an air preheater according to claim 1, characterized in that: The support frame includes a placement plate, which is connected to the workbench through a support rod, and the preheater shell is placed on the placement plate; a plurality of ear plates are fixedly connected to the preheater shell, and connecting screws corresponding to and penetrating each ear plate are fixedly connected to the placement plate, and the connecting screws are fixed by nuts after penetrating the ear plates.

9. The device for clearing dust blockage in air preheater according to claim 1, characterized in that: The vertical plate and the upper sliding block are connected via an oblique brace, one end of the oblique brace is fixedly connected to the upper sliding block, and the other end is fixedly connected to the vertical plate.

10. The device for clearing dust blockage in air preheater according to claim 1, characterized in that: The supporting legs are fixedly connected to the lower surface of the workbench.

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