Quick plugging device for flue leakage point

Abstract

The utility model relates to the technical field of plugging devices, and provides a quick plugging device for a flue leakage point in order to overcome the defects that in the prior art, the welding precision is not easy to control, the inner diameters of sliding grooves are easily inconsistent, plugging of a plugging plate is not stable enough, and the plugging effect is not tight enough, and the quick plugging device for the flue leakage point comprises a flue body and a positioning arc-shaped block, a sliding groove is formed in the side, close to the inner ring, of the positioning arc-shaped block, a movable arc-shaped block is slidably installed in the sliding groove, the inner diameter of the movable arc-shaped block and the inner diameter of the positioning arc-shaped block are both matched with the outer diameter of the flue body, a notch is formed in the side, close to the inner ring, of the movable arc-shaped block, and a patch is embedded in the notch. According to the utility model, the positioning arc-shaped block is matched with the movable arc-shaped block to drive the patch block to block a leak area, and then the patch block and the flue body are welded into a whole through the welding hole, so that the plugging speed is high, and the plugging is more stable.

Description

Technical Field

[0001] The utility model relates to the technical field of plugging devices, in particular to a rapid plugging device for a flue leakage point. Background Art

[0002] In the positive pressure flue of the boiler in a thermal power plant, the flue and skin at the outlet of the induced draft fan are in relatively poor working conditions. They are under positive pressure conditions of up to several thousand Pa for a long time. At the same time, they are affected by wear, positive pressure, flue vibration, flue gas corrosion, etc., and are prone to rust or damage of the flue and skin, causing flue gas leakage. Flue gas leakage in the positive pressure flue is likely to cause environmental pollution and deteriorate the working environment of maintenance personnel.

[0003] In the prior art, an online sealing device for positive pressure flue leakage at the tail end of a thermal power plant boiler (publication number: CN207486830U) is provided with a slideway welded on both sides of the flue leakage point, and a plugging plate is inserted in the slide groove of the slideway. The plugging plate is pushed onto the slideway by the positive pressure of the flue gas at the tail end of the boiler, and the plugging plate seals the flue leakage point. There is no need for maintenance personnel to get close to the flue leakage point, which can effectively reduce the harm of high temperature and choking flue gas to maintenance personnel. However, before sealing, the device needs to weld angle irons on the surface of the flue body to make a slide groove. For a tubular flue, the vertical welding accuracy is not easy to control, which easily causes inconsistent inner diameters of the slide groove, making the blocking of the plugging plate not stable enough and the blocking effect not tight enough. Therefore, it is urgent to design a rapid sealing device for flue leakage points with more stable blocking effect. Utility Model Content

[0004] The utility model aims to solve the shortcomings in the prior art that the welding precision is not well controlled, which easily causes inconsistent inner diameter of the slide groove, resulting in unstable sealing of the plugging plate and insufficient sealing effect, and proposes a rapid plugging device for flue leakage points.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A device for quickly plugging a flue leakage point comprises a flue body and a positioning arc block, wherein a slide groove is provided on the side of the positioning arc block close to an inner circle, a movable arc block is slidably installed in the slide groove, the inner diameters of the movable arc block and the positioning arc block are both adapted to the outer diameter of the flue body, a notch is provided on the side of the movable arc block close to the inner circle, a patch block is embedded in the notch, a groove is provided on the other side of the movable arc block, and a driving mechanism is provided in the groove.

[0007] As a further technical solution of the utility model, the patch is made of metal material and has a plurality of through holes for welding on its surface.

[0008] As a further technical solution of the utility model, two avoidance grooves are symmetrically provided on the upper and lower sides of the groove, and a plurality of welding holes are provided in each of the avoidance grooves.

[0009] As a further technical solution of the utility model, the driving mechanism includes a servo motor, an arc-shaped rack and a helical gear. The bottom of the arc-shaped rack is fixedly installed on one side of the groove. The servo motor is fixedly installed on one side of the positioning arc-shaped block. The helical gear is rotatably installed in the slide groove, and the helical gear is meshed with the arc-shaped rack.

[0010] As a further technical solution of the utility model, a slag cleaning block is fixedly installed at one end of the movable arc block, one side of the slag cleaning block is provided with a scraper structure, and two limit rods are fixedly installed at one side of the slag cleaning block.

[0011] As a further technical solution of the utility model, the two limit rods are in an arc-shaped strip structure, two limit holes matching the limit rods are opened on the surface of one end of the positioning arc block, and a handle is fixedly installed on the surface of the positioning arc block.

[0012] The beneficial effects of the utility model are:

[0013] By setting the positioning arc block to cooperate with the moving arc block, the positioning arc block is clamped on the other side surface of the flue body where the hole is, and then the moving arc block is driven by the driving mechanism to slide along the slide groove and slide close to the flue body until the moving arc block carries the patch to seal the leak area, and then the patch and the flue body are welded into a whole through the welding hole, which has a fast sealing speed and improves the stability after sealing. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a structural schematic diagram of a flue leakage point rapid plugging device proposed by the utility model;

[0015] Figure 2 This is a schematic diagram of the explosion structure of a device for quickly plugging a flue leakage point proposed by the utility model;

[0016] Figure 3 This is a schematic diagram of the top view of a device for quickly plugging a flue leakage point proposed by the utility model;

[0017] Figure 4 The utility model is a schematic diagram of the side structure of a device for quickly plugging a flue leakage point.

[0018] In the figure: 1. flue body; 2. positioning arc block; 3. handle; 4. servo motor; 5. moving arc block; 6. slag cleaning block; 7. limiting rod; 8. patch block; 9. arc rack; 10. spiral gear; 201. slide groove; 202. limiting hole; 501. groove; 502. avoidance groove; 503. welding hole. DETAILED DESCRIPTION

[0019] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further described below in conjunction with specific implementation methods.

[0020] In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "front end", "rear end", "two ends", "one end", "the other end" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0021] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "provided with", "connected", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0022] Please see attached Figure 1 -Attached Figure 4 A device for quickly plugging a flue leakage point comprises a flue body 1 and a positioning arc block 2, a slide groove 201 is provided on the side of the positioning arc block 2 close to the inner circle, a movable arc block 5 is slidably installed in the slide groove 201, the inner diameters of the movable arc block 5 and the positioning arc block 2 are both adapted to the outer diameter of the flue body 1, a notch is provided on the side of the movable arc block 5 close to the inner circle, a patch block 8 is embedded in the notch, a groove 501 is provided on the other side of the movable arc block 5, a driving mechanism is provided in the groove 501, the patch block 8 is made of metal material, and a plurality of through holes for welding are provided on the surface, two avoidance grooves 502 are symmetrically provided on the upper and lower sides of the groove 501, and a plurality of welding holes 503 are provided in each avoidance groove 502.

[0023] When in use, first clamp the positioning arc block 2 on the other side surface of the flue body 1 where there is a leak, and then drive the movable arc block 5 to slide along the slide groove 201 through the driving mechanism, and slide close to the flue body 1 until the movable arc block 5 carries the patch block 8 to seal the leak area, and after the leaked harmful gas is purified or diluted, the patch block 8 and the flue body 1 are welded into a whole through the welding hole 503. The sealing speed is fast and workers are prevented from directly contacting the harmful gas in the leakage area, thereby improving the safety of the leaking flue sealing operation and improving the stability after sealing.

[0024] In this embodiment, the driving mechanism includes a servo motor 4, an arc rack 9 and a helical gear 10. The bottom of the arc rack 9 is fixedly installed on one side of the groove 501. The servo motor 4 is fixedly installed on one side of the positioning arc block 2. The helical gear 10 is rotatably installed in the slide groove 201. The helical gear 10 is meshed with the arc rack 9. A slag cleaning block 6 is fixedly installed on one end of the movable arc block 5. A scraper structure is provided on one side of the slag cleaning block 6. Two limit rods 7 are fixedly installed on one side of the slag cleaning block 6. The two limit rods 7 are in an arc strip structure. Two limit holes 202 adapted to the limit rods 7 are provided on the surface of one end of the positioning arc block 2. A handle 3 is fixedly installed on the surface of the positioning arc block 2.

[0025] When in use, the servo motor 4 drives the helical gear 10 to rotate, thereby driving the movable arc block 5 fixedly installed with the arc rack 9 to slide out of the slide groove 201, and the impurities on the surface of the flue body 1 are removed at the front end by the scraper structure slag cleaning block 6, so that the inner diameter of the movable arc block 5 can slide tightly against the outer side of the flue body 1 until the patch block 8 blocks the hole, firstly, the patch block 8 is spot welded to the surface of the flue body 1 through the welding hole 503, and then the equipment is taken out downward, so that the patch block 8 is separated from the equipment from above the notch, and then the patch block is fully welded around to improve the sealing and stability of the plugging, and by setting the limit rod 7, the equipment can be more stably and tightly fitted to the flue body 1 before welding the patch block 8, thereby avoiding smoke leakage during spot welding and further improving the stability of the equipment operation process.

[0026] From the above description, it can be seen that the above-mentioned embodiment of the present invention achieves the following technical effects: when in use, the positioning arc block 2 is driven to be stuck on the surface of the flue body 1 by grasping the handle 3 (or by a mechanical arm), and then the servo motor 4 is started to drive the spiral gear 10 to rotate. The spiral gear 10 drives the movable arc block 5 to slide on the surface of the flue body 1 by meshing with the arc rack 9, until the patch block 8 is driven to seal the hole in the flue body 1. At this time, the two limiting rods 7 are inserted into the limiting holes 202 at one end of the positioning arc block 2, so that the patch block 8 can seal the hole tightly and stably, and then wait for the originally leaked flue gas to be purified or diluted. The operator inserts the welding gun head through the welding hole 503, and through the through hole on the surface of the patch block 8, first fixes the patch block 8 by spot welding, and then pulls out a part of the entire device downward to expose the patch block 8, and then fully welds its exposed edge until the device is completely separated from the patch block 8. The patch block 8 is fully welded all around, and the sealing effect is good and very firm.

[0027] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A device for quickly plugging a flue leakage point, comprising a flue body (1) and a positioning arc block (2), characterized in that: The positioning arc block (2) is provided with a slide groove (201) on one side close to the inner circle, a movable arc block (5) is slidably installed in the slide groove (201), the inner diameters of the movable arc block (5) and the positioning arc block (2) are both adapted to the outer diameter of the flue body (1), the movable arc block (5) is provided with a notch on one side close to the inner circle, a patch block (8) is embedded in the notch, the other side of the movable arc block (5) is provided with a groove (501), a driving mechanism is arranged in the groove (501).

2. A flue leakage point rapid plugging device according to claim 1, characterized in that: The patch (8) is made of metal material and has a plurality of through holes on its surface for welding.

3. A flue leakage point rapid plugging device according to claim 1, characterized in that: Two avoidance grooves (502) are symmetrically provided on the upper and lower sides of the groove (501), and each avoidance groove (502) is provided with a plurality of welding holes (503).

4. A flue leakage point rapid plugging device according to claim 1, characterized in that: The driving mechanism comprises a servo motor (4), an arc-shaped rack (9) and a helical gear (10); the bottom of the arc-shaped rack (9) is fixedly mounted on one side of the groove (501); the servo motor (4) is fixedly mounted on one side of the positioning arc-shaped block (2); the helical gear (10) is rotatably mounted in the slide groove (201); and the helical gear (10) is meshed with the arc-shaped rack (9).

5. A flue leakage point rapid plugging device according to claim 4, characterized in that: A slag cleaning block (6) is fixedly mounted on one end of the movable arc block (5), one side of the slag cleaning block (6) is provided with a scraper structure, and two limit rods (7) are fixedly mounted on one side of the slag cleaning block (6).

6. A device for quickly plugging a flue leakage point according to claim 5, characterized in that: The two limiting rods (7) are in an arc-shaped strip structure, and one end surface of the positioning arc block (2) is provided with two limiting holes (202) adapted to the limiting rods (7), and a handle (3) is fixedly mounted on the surface of the positioning arc block (2).

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