Repairing device for three-way position of hot blast stove

Abstract

The utility model provides a repairing device for a fork position of a hot blast stove. The repairing device comprises a clamping fixture assembly capable of being matched with the fork position of the hot blast stove and a fixing device used for fixing the clamping fixture assembly. The clamping fixture assembly comprises a first clamping fixture, a second clamping fixture and a third clamping fixture, when the clamping fixture assembly is installed at the position of the three-way opening of the hot blast stove, the center line of the first clamping fixture coincides with the center line of the second clamping fixture, the third clamping fixture is located between the first clamping fixture and the second clamping fixture, and the center line of the third clamping fixture and the center line of the first clamping fixture are perpendicular to each other and intersect with each other. The split type hot blast stove mold is reasonable in structure, the three molds capable of being spliced and assembled are adopted to be rapidly spliced at the position of the hot blast stove fork, the molds can be rapidly fixed through the fixing devices, and therefore grouting repair can be conveniently conducted on the damaged position of the fork, the three molds can be matched and attached to the inner wall of the fork in shape after being assembled, and the safety of the hot blast stove is improved. Therefore, the grouting repair speed and effect can be improved, and the repair difficulty of the fork position is reduced.

Description

TECHNICAL FIELD

[0001] The utility model belongs to hot -blast stove repair technical field, concretely relates to a kind of repair device of hot -blast stove three-fork position. BACKGROUND

[0002] Hot blast stove is important equipment in blast furnace ironmaking production, and its three-fork position is the weakest link of hot blast pipeline due to complex structure and harsh working conditions, and is prone to damage. With the improvement of ironmaking capacity, the hot blast temperature requirement for blast furnace is higher, and the hot blast pipeline of hot blast stove system bears high wind temperature and high wind pressure. The three-fork position frequently appears brick lining deformation, brick falling, and even collapse, causing hot blast pipeline network to produce air leakage, local overheating, red deformation and other dangerous hidden troubles, seriously affecting the normal production of blast furnace, causing serious loss of heat energy and decline of production output, and even causing pipeline burn-through.

[0003] At present, the inner wall repair technology of hot blast stove straight-through section is relatively mature, and most of them use grouting repair method for pipeline repair, but there are still many deficiencies in the repair of hot blast stove three-fork position. The main reason is that there is no matching mould due to the special structure of the three-fork position. Figure 7 As shown in the figure, the longitudinal sectional view of the existing hot blast stove three-fork position is shown in the figure. The a area position in the figure is the junction area of two mutually perpendicular pipelines. Due to the special structure of this area, when the area is damaged, there is no suitable mould and no structure to fix the mould in the existing technology to complete grouting, and only manual painting or spraying can be used for repair, resulting in poor repair effect, high repair difficulty and long repair cycle of three-fork position. UTILITY MODEL CONTENTS

[0004] The utility model provides a kind of repair device of hot blast stove three-fork position, three splicable moulds are used to be quickly assembled at hot blast stove three-fork position, and mould can be quickly fixed by fixing device, so as to facilitate grouting repair to three-fork damaged position. After the assembly of three moulds, it can be matched with the shape of the inner wall of three-fork, so as to improve the speed and effect of grouting repair, and reduce the repair difficulty of three-fork position.

[0005] The technical scheme adopted by the utility model is: a kind of repair device of hot blast stove three-fork position, including mould assembly capable of matching with hot blast stove three-fork position, and fixing device for fixing mould assembly.

[0006] The mold assembly comprises a first mold, a second mold and a third mold, the center lines of the first mold and the second mold coincide with each other when the mold assembly is installed at the three-way junction position of the hot blast furnace, the third mold is located between the first mold and the second mold, and the center lines of the first mold and the third mold are perpendicular to and cross each other, the outer wall of the assembled first mold, second mold and third mold can match the shape of the inner wall of the three-way junction position of the hot blast furnace, and a plurality of grouting holes are formed in the thickness direction of the first mold, the second mold and the third mold.

[0007] The cross-sectional shape of the first mold, the second mold and the third mold is semicircular.

[0008] The fixing device comprises a screw rod, one end of the screw rod is rotatably connected with a support, the middle part of the screw rod is threadedly connected with a movable seat, a first supporting rod and a second supporting rod are hingedly connected in the circumferential direction of the movable seat and the support respectively, and the distal ends of the first supporting rod and the second supporting rod are hingedly connected with a supporting plate.

[0009] The outer wall of the supporting plate is an arc surface, and the curvature of the arc surface matches the curvature of the inner wall of the first mold.

[0010] The supporting plate is detachably provided with a pad, and the thickness of the pad is the same as the wall thickness of the first mold.

[0011] A T-shaped groove is formed in the outer surface of the supporting plate, one end of the T-shaped groove penetrates the side wall of the supporting plate, the surface of the pad is provided with a T-shaped block, and the T-shaped block is slidingly connected in the T-shaped groove.

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

[0013] The utility model discloses reasonable in design, adopts three splicing assembly's mould and carries out quick splicing at the three-way junction position of hot blast furnace, and through fixing device, the mould can be fixed quickly, thereby being convenient for the grouting repair of three-way junction damaged position, three moulds can match the shape of the inner wall of three-way junction after assembling, thereby can improve the speed and effect of grouting repair, and reduce the repair difficulty of three-way junction position. ACCURACY OF DRAWINGS

[0014] Figure 1 It is the schematic view of the utility model in installation to three-way junction position;

[0015] Figure 2 It is the side view of the utility model;

[0016] Figure 3 It is the structure diagram of the fixing device of the utility model;

[0017] Figure 4 It is the connecting structure diagram of the supporting plate and the pad of the utility model;

[0018] Figure 5 is an installation explosion view of the jig and the three-way position of the utility model;

[0019] Figure 6 is a back perspective view of the assembled jig of the utility model;

[0020] Figure 7 is a sectional view of the three-way position of the hot blast furnace.

[0021] Among them:

[0022] 1, first jig; 2, second jig; 3, third jig; 4, grouting hole; 5, screw rod; 6, support; 7, movable seat; 8, first support rod; 9, second support rod; 10, support plate; 1001, T-shaped groove; 11, cushion block. DETAILED DESCRIPTION

[0023] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the utility model.

[0024] As shown in the figure, a repairing device for the three-way position of a hot blast furnace, comprising a jig assembly capable of matching the three-way position of the hot blast furnace, and a fixing device for fixing the jig assembly;

[0025] The mold assembly comprises a first mold 1, a second mold 2 and a third mold 3, when the mold assembly is installed at the hot blast stove three-way junction position, the center lines of the first mold 1 and the second mold 2 coincide with each other, the third mold 3 is located between the first mold 1 and the second mold 2, and the center lines of the third mold 3 and the first mold 1 are perpendicular to each other and intersect with each other, the outer wall of the assembled first mold 1, second mold 2 and third mold 3 can match the shape of the inner wall of the hot blast stove three-way junction position, and a plurality of grouting holes 4 are formed in the thickness direction of the first mold 1, the second mold 2 and the third mold 3, wherein the size of the first mold 1, the second mold 2 and the third mold 3 is designed according to the actual inner diameter of the hot blast stove three-way junction position. Since the pipe at the existing hot blast stove three-way junction position has the same inner diameter in the transverse and longitudinal directions, the cross-sectional size of the first mold 1, the second mold 2 and the third mold 3 is the same, that is, the outer diameter of the three molds matches the inner wall of the pipe, and the inner diameters of the three molds are the same. In actual repair, a corresponding number and type of molds can be selected according to the specific damaged position of the three-way junction, wherein the corresponding number refers to the number of a type of mold, and the corresponding type refers to selecting the first mold 1, the second mold 2 and / or the third mold 3 according to the situation. After covering the outer wall of the mold to the damaged position, the mold is fixed, and then the grout is introduced into the damaged area through the grouting hole 4 to complete the grouting operation.

[0026] Specifically, the end of the third mold 3 extends outward in the form of an arc-shaped sharp spike, the ends of the first mold 1 and the second mold 2 have notched portions matching the arc-shaped sharp spike, so that the outer wall of the first mold 1, the second mold 2 and the third mold 3 can match the shape of the inner wall of the hot blast stove three-way junction position after assembly, and the problem of being unable to grout due to the special shape of the three-way junction position can be solved.

[0027] As shown in Figure 1 , the first mold 1 and the third mold 3 are combined, and the repair area b in the figure can be covered, and then grouting repair is performed.

[0028] Specifically, the cross-sectional shape of the first mold 1, the second mold 2 and the third mold 3 is semicircular, which is arranged to facilitate the quick introduction of the three molds into the hot blast stove pipe and improve the assembly speed; or in another embodiment, the cross-sectional shape of the three molds is one-third of a circle, which can improve the convenience of placing the mold in the pipe. In the actual repair process, different numbers of molds can be selected according to the size of the damaged surface, for example, when the damaged surface is large, two first molds 1 are combined to obtain a whole circular structure when the cross-sectional shape of the three molds is semicircular; or when the damaged surface is small, one first mold 1 can cover the damaged area, which can also achieve the effect of grouting.

[0029] The fixing device comprises a screw rod 5, one end of the screw rod 5 is rotatably connected with a support 6, the support 6 only has a rotational freedom relative to the screw rod 5, and the support 6 cannot move along the axis direction of the screw rod 5; a middle part of the screw rod 5 is threadedly connected with a movable seat 7, a first supporting rod 8 and a second supporting rod 9 are respectively hinged in the circumferential direction of the movable seat 7 and the support 6, and the ends of the first supporting rod 8 and the second supporting rod 9 are hinged with a supporting plate 10; when the fixing device is used, the distance between the movable seat 7 and the support 6 can be increased or decreased by rotating the screw rod 5, so that the working angles of the first supporting rod 8 and the second supporting rod 9 are changed, and then the outward or inward movement of the supporting plate 10 is realized; when the supporting plate 10 moves outward, the force can be applied to the inner wall position of the mold, so that the mold is fixed.

[0030] The outer wall of the supporting plate 10 is an arc surface, the curvature of the arc surface is matched with the curvature of the inner wall of the first mold 1; since the cross-sectional shapes of the three molds are consistent, the supporting plate 10 can also be closely attached to the inner walls of the second mold 2 and the third mold 3 when the supporting plate 10 is used; the purpose is that the supporting plate 10 has a larger contact area with the molds during the fixing of the three molds by the supporting plate 10, so that the effect of stably supporting the molds can be realized, the fixing of the molds is more firm, and the problem of loosening during grouting is avoided.

[0031] The supporting plate 10 is detachably mounted with a pad 11, the thickness of the pad 11 is the same as the wall thickness of the first mold 1; during actual repair, part of the supporting plate 10 can be in contact with the inner wall of the mold, and part of the supporting plate 10 can not be in contact with the inner wall of the mold (because the damaged surface of the hot blast furnace pipeline is small, when a single mold is used for repair, the mold is assembled and does not form a whole circle structure); the pad 11 can make the screw rod 5 be in the central position of the pipeline, so that each supporting plate 10 is uniformly and stably stressed, and then the supporting and fixing effects of the mold are improved.

[0032] A T-shaped groove 1001 is formed in the outer surface of the supporting plate 10, one end of the T-shaped groove 1001 penetrates the side wall of the supporting plate 10, a T-shaped block is arranged on the surface of the pad 11, and the T-shaped block is slidably connected in the T-shaped groove 1001, so as to facilitate the rapid assembly of the pad 11 and improve the assembly efficiency.

[0033] The above only describes the preferred embodiments of the present application, and is not intended to limit the present application; any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A repair device for the three-way junction of a hot blast stove, characterized in that, It includes a jig assembly that can be matched with the position of the three-way inlet of the hot blast stove, and a fixing device for fixing the jig assembly. The jig assembly includes a first jig, a second jig, and a third jig. When the jig assembly is installed at the three-way junction of the hot blast stove, the center lines of the first jig and the second jig coincide with each other. The third jig is located between the first jig and the second jig, and the center lines of the third jig and the first jig are perpendicular to each other and intersect each other. The outer wall of the assembled first jig, second jig, and third jig can match the shape of the inner wall of the three-way junction of the hot blast stove. Several grouting holes are opened in the thickness direction of the first jig, the second jig, and the third jig.

2. The repair device for the three-way junction of a hot blast stove according to claim 1, characterized in that, The cross-sectional shape of the first, second, and third fixtures is semi-circular.

3. The repair device for the three-way junction of a hot blast stove according to claim 1, characterized in that, The fixing device includes a lead screw, one end of which is rotatably connected to a support, and a movable seat threadedly connected to the middle of the lead screw. A first support rod and a second support rod are respectively hinged in the circumferential direction of the movable seat and the support. Support plates are hinged to the ends of the first support rod and the second support rod.

4. The repair device for the three-way junction of a hot blast stove according to claim 3, characterized in that, The outer wall of the support plate is curved, and the curvature of the curved surface matches the curvature of the inner wall of the first fixture.

5. The repair device for the three-way junction of a hot blast stove according to claim 3, characterized in that, The support plate is detachably fitted with pads, the thickness of which is the same as the wall thickness of the first jig.

6. The repair device for the three-way junction of a hot blast stove according to claim 5, characterized in that, The outer surface of the support plate is provided with a T-shaped groove, one end of which passes through the side wall of the support plate. The surface of the pad is provided with a T-shaped block, which is slidably connected in the T-shaped groove.

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