JP3225923U - Jig and support structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a jig and a support structure capable of lifting a heat transfer tube panel in a stable state. A jig 60 for hoisting a furnace wall panel 108 in which a plurality of heat transfer tubes 108a are arranged side by side, the jig 60 protruding in a Y-axis direction intersecting a main surface of the furnace wall panel 108. And a pair of support portions 80 arranged so as to be sandwiched from both sides with respect to the hanging portion 70 and fixed to the furnace wall panel 108 with bolts 61. , Are provided. Each of the supporting portions 80 extends in the Y-axis direction and is fixed to the hanging portion 70, and is separated from the hanging portion 70 in the X-axis direction orthogonal to the Y-axis direction along the main surface from the fixing portion 81. The contact portion 82 extends and contacts the heat transfer tube panel 108. [Selection diagram] Fig. 3

Description

  The present disclosure relates to a jig and a support structure.

  For example, a large-scale boiler such as a coal-fired boiler has a furnace having a hollow shape and installed in the vertical direction, and a plurality of combustion burners are arranged on the furnace wall along the circumferential direction of the furnace. Further, in the coal-fired boiler, a flue is connected vertically above the furnace, and a heat exchanger for generating steam is arranged in the flue. Then, the combustion burner injects a mixture of fuel and air (oxidizing gas) into the furnace to form a flame, and combustion gas is generated and flows into the flue. A heat exchanger is installed in the region where the combustion gas flows, and superheated steam is generated by heating the water and steam flowing in the heat transfer tubes that form the heat exchanger.

  The furnace wall of the coal-fired boiler may be composed of a furnace wall panel 108 that has a plurality of heat transfer tubes through which can water flows and fins that join the heat transfer tubes together. Since the furnace wall panel 108 deteriorates with age, all or part of the furnace wall panel 108 may be replaced during maintenance such as regular inspection. When performing the replacement work, the furnace wall panel 108 is lifted during transportation or installation of the furnace wall panel 108. Therefore, in order to lift the furnace wall panel 108, it is known that a hanging hardware is fixed to the furnace wall panel 108, a lifting device is attached to the lifting hardware, and the furnace wall panel 108 is lifted through the lifting hardware. (For example, Patent Document 1).

  Patent Document 1 describes a structure in which a lifting beam having a clamp and a flange is applied to both sides of the panel, and these members are clamped and fixed to the panel with a clamp bolt. In this structure, a plurality of metal fittings for attaching a hanging metal fixed by welding or the like are provided between the upper and lower flanges of the hoisting beam. In addition, a hanging hardware that is attached to the hanging hardware mounting bracket with a tightening bolt and a nut is provided. Moreover, the shackle pin hole is provided in the hanging hardware.

Japanese Utility Model Publication No. 60-142228

  However, the hanging hardware described in Patent Document 1 is fixed only to one surface side of the hanging hardware mounting bracket fixed to the lifting beam. As a result, when the panel is lifted through the hanging hardware, stress is concentrated on a part of the hanging hardware and the fitting for mounting the hanging hardware, and the hanging hardware and / or the fitting for mounting the hanging hardware may be deformed. is there. If the hanging hardware and / or the fitting for mounting the hanging hardware is deformed, the panel may not be lifted in a stable state.

  The present disclosure has been made in view of such circumstances, and an object of the present disclosure is to provide a jig and a support structure that can lift a heat transfer tube panel in a stable state.

In order to solve the above problems, the jig and support structure of the present disclosure employ the following means.
A jig according to an aspect of the present disclosure is a jig for lifting a heat transfer tube panel in which a plurality of heat transfer tubes are arranged side by side, and is configured to project in a predetermined direction intersecting a main surface of the heat transfer tube panel. A suspension part to which the suspension device is attached; and a pair of support parts, which are arranged so as to sandwich the suspension part from both sides with respect to the suspension part, and which are fixed to the heat transfer tube panel using engaging parts. , Each of the support portions extends in the predetermined direction and is fixed to the suspension portion, and is separated from the suspension portion in a direction orthogonal to the predetermined direction from the fixing portion along the main surface. And a contact portion that extends and contacts the heat transfer tube panel.

  According to the present disclosure, the heat transfer tube panel can be lifted in a stable state.

It is a schematic block diagram showing the coal-fired boiler which concerns on 1st Embodiment of this indication. It is a perspective view showing a furnace wall panel concerning a 1st embodiment of this indication. FIG. 3 is a plan view of a jig provided on the furnace wall panel shown in FIG. 2. It is a perspective view which shows the suspension part and support part of the jig shown in FIG. 3, Comprising: It is a figure which shows the state before fixing a suspension part to a support part. It is a perspective view which shows the suspension part and support part of the jig shown in FIG. 3, Comprising: It is a figure which shows the state which fixed the suspension part to the support part. FIG. 6 is a perspective view showing a main part and a furnace wall panel of a jig according to a second embodiment of the present disclosure. FIG. 7 is a plan view of a main part of the jig and a furnace wall panel shown in FIG. 6. It is a figure which shows the modification of FIG. It is a perspective view showing the important section of the jig concerning the 1st reference example, and is a figure showing the state before fixing a hanging part to a support plate. It is a perspective view showing the important section of the jig concerning the 1st reference example, and is a figure showing the state where the hanging part was fixed to the support plate.

  Hereinafter, preferred embodiments of a jig and a support structure according to the present disclosure will be described with reference to the drawings. It should be noted that the present disclosure is not limited to this embodiment, and when there are a plurality of embodiments, the present disclosure also includes those configured by combining the embodiments.

[First Embodiment]
A first embodiment according to the present disclosure will be described with reference to FIGS. 1 to 6.
FIG. 1 is a schematic configuration diagram showing a coal-fired boiler of the present embodiment.

  As the present embodiment, for example, the coal-fired boiler 10 uses pulverized coal obtained by pulverizing coal (carbon-containing solid fuel) as pulverized fuel, burns the pulverized fuel with a combustion burner, and heat generated by this combustion is supplied to water or steam. It is a coal-fired (pulverized coal-fired) boiler capable of exchanging heat with and generating superheated steam. In the following description, “upper” and “upper” refer to the upper side in the vertical direction, and “lower” and “lower” refer to the lower side in the vertical direction, and the vertical direction is not exact and includes an error.

  In the present embodiment, as shown in FIG. 1, the coal-fired boiler 10 has a furnace 11, a combustion device 12, and a combustion gas passage 13. The furnace 11 has a hollow rectangular tube shape and is installed along the vertical direction. As shown in FIG. 2, the furnace wall 101 that constitutes the furnace 11 and the combustion gas passage 13 is composed of a plurality of heat transfer tubes 108a and fins 108b that connect them, and heat generated by the combustion of the fine powder fuel is transferred to the heat transfer tubes. The temperature rise of the furnace wall 101 is suppressed by exchanging heat with the feed water and steam flowing inside the furnace. The details of the furnace wall 101 will be described later.

  As shown in FIG. 1, the combustion device 12 is provided on the lower side of the furnace 11. In the present embodiment, the combustion device 12 has a plurality of combustion burners 21, 22, 23, 24, 25 mounted on the furnace 11. For example, the combustion burners 21, 22, 23, 24, 25 are arranged in a plurality of stages along the vertical direction, with one set of the burners 21, 22, 23, 24, 25 arranged at equal intervals along the circumferential direction of the furnace 11. However, the shape of the furnace, the number of combustion burners in one stage, the number of stages, the arrangement, etc. are not limited to this embodiment.

  Each combustion burner 21, 22, 23, 24, 25 is connected to a plurality of pulverizers (mills) 31, 32, 33, 34, 35 via pulverized coal supply pipes 26, 27, 28, 29, 30. There is. Although not shown, the crushers 31, 32, 33, 34, and 35 have, for example, a rotary table rotatably supported in a housing of the crusher, and a plurality of rollers are provided above the rotary table to rotate the rotary table. It is rotatably supported in conjunction with each other. When the coal is introduced between the plurality of rollers and the rotary table, it is pulverized into a predetermined pulverized coal size here, and the carrier gas (primary air, oxidizing gas) causes a crusher inside the housing of the crusher not shown. It is possible to supply the pulverized fuel, which has been conveyed to the classifier and classified within a predetermined size particle size range, to the combustion burners 21, 22, 23, 24, 25 from the pulverized coal supply pipes 26, 27, 28, 29, 30. it can.

  Further, the furnace 11 is provided with a wind box 36 at the mounting position of each combustion burner 21, 22, 23, 24, 25, and one end portion of an air duct (air passage) 37 is connected to the wind box 36. There is. At the other end of the air duct 37, a forced draft fan (FDF) 38 is provided.

  As shown in FIG. 1, the combustion gas passage 13 is connected to a vertically upper portion of the furnace 11. The combustion gas passage 13 is provided with superheaters 102, 103, 104, reheaters 105, 106, and a economizer 107 as heat exchangers for recovering heat of the combustion gas, and the combustion in the furnace 11 is performed. Heat is exchanged between the combustion gas generated in 1) and the feed water or steam flowing through each heat exchanger.

  As shown in FIG. 1, the combustion gas passage 13 is connected to a flue 14 downstream of which the combustion gas having undergone heat exchange is discharged. The flue 14 is provided with an air heater (air preheater) 42 between it and the air duct 37, and heat is exchanged between the air flowing through the air duct 37 and the combustion gas flowing through the flue 14. , 22, 23, 24, 25 can be heated.

  Further, the flue 14 is provided with a denitration device 43 at a position upstream of the air heater 42. The denitration device 43 supplies a reducing agent having a function of reducing nitrogen oxides such as ammonia and urea water into the flue 14 and causes the combustion gas supplied with the reducing agent to react with the nitrogen oxides and the reducing agent. The nitrogen oxide in the combustion gas is removed and reduced by accelerating it by the catalytic action of the denitration catalyst installed in the denitration device 43. The gas duct 41 connected to the flue 14 is provided with a dust collector 44 such as an electric dust collector, an induced draft fan (IDF: Induced Draft Fan) 45, and a desulfurizer 46 at a position downstream of the air heater 42. A chimney 50 is provided at the downstream end.

  On the other hand, when a plurality of pulverizers 31, 32, 33, 34, 35 are driven, the produced pulverized fuel and the carrier gas (primary air, oxidizing gas) together with the pulverized coal supply pipes 26, 27, 28, 29, 30. To the combustion burners 21, 22, 23, 24, 25. In addition, by exchanging heat with the exhaust gas discharged from the flue 14 of the coal-fired boiler 10 by the air heater 42, the heated combustion air (secondary air, oxidizing gas) is passed from the air duct 37 through the wind box 36. Is supplied to each combustion burner 21, 22, 23, 24, 25. Then, the combustion burners 21, 22, 23, 24 and 25 blow a fine powder fuel mixture in which the fine powder fuel and the carrier gas are mixed into the furnace 11, and at the same time blow combustion air into the furnace 11, at which time the fine fuel mixture is mixed. A flame can be formed when the air ignites. A flame is generated in the lower part of the furnace 11, and the high temperature combustion gas rises in the furnace 11 and is discharged to the combustion gas passage 13. In this embodiment, air is used as the oxidizing gas. The oxygen content may be higher or lower than that of air, and can be used by optimizing the fuel flow rate.

  Further, the furnace 11 is provided with an additional air port 39 above the mounting position of each combustion burner 21, 22, 23, 24, 25. An end of an additional air duct 40 branched from the air duct 37 is connected to the additional air port 39. Therefore, the combustion air (secondary air, oxidizing gas) sent by the forced draft fan 38 is supplied from the air duct 37 to the wind box 36, and the combustion burners 21, 22, 23, 24, and The additional air for combustion (additional air) sent by the forced draft fan 38 can be supplied to the additional air port 39 from the additional air duct 40.

  In the lower region A of the furnace 11, the pulverized fuel mixture and the combustion air (secondary air, oxidizing gas) are combusted to generate a flame. Here, the inside of the furnace 11 is maintained in a reducing atmosphere by setting the amount of air supplied to be less than the theoretical amount of air with respect to the amount of pulverized coal supplied. That is, the nitrogen oxides (NOx) generated by the combustion of the pulverized coal are reduced in the region B of the furnace 11, and then additional air is additionally supplied from the additional air port 39 to complete the oxidative combustion of the pulverized coal. The amount of NOx generated by combustion of pulverized coal is reduced.

  After that, as shown in FIG. 1, the combustion gas includes a second superheater 103, a third superheater 104, a first superheater 102 (hereinafter sometimes simply referred to as a superheater) arranged in the combustion gas passage 13. ), The second reheater 106, the first reheater 105 (which may be simply referred to as a reheater hereinafter), and the economizer 107, the nitrogen oxides are reduced and removed by the denitration device 43. After the particulate matter is removed by the dust collector 44 and the sulfur oxides are removed by the desulfurizer 46, the particulate matter is discharged from the chimney 50 into the atmosphere. The heat exchangers do not necessarily have to be arranged in the order described above with respect to the combustion gas flow.

  Next, details of the furnace wall 101 will be described with reference to FIG. In the following description, the extending direction of the heat transfer tubes is referred to as the Z-axis direction, and the direction orthogonal to the Z-axis direction and in which the heat transfer tubes 108a are arranged is referred to as the X-axis direction. The direction orthogonal to the direction is called the Y-axis direction. When the furnace wall panel 108, which will be described later, is installed on the coal-fired boiler 10, the Z-axis direction is the vertical vertical direction.

  As shown in FIG. 2, the furnace wall 101 includes a plurality of panel-shaped furnace wall panels (heat transfer tube panels) 108. The plurality of furnace wall panels 108 are arranged side by side so as to be substantially flush with each other, and the gaps between the furnace wall panels 108 are joined by fins 108b or the like. The furnace wall panel 108 has a length in the Z-axis direction of about 3 m to about 5 m, and a length in the X-axis direction of about 1.5 m to about 2 m, for example. The size of the furnace wall panel 108 is an example, and is not limited to this value. The size and shape of the furnace wall panel 108 may be set so as to satisfy restrictions such as transportation restrictions and the size of the entrance to the furnace 11.

  Each furnace wall panel 108 has a plurality of long heat transfer tubes 108a and fins 108b that join a part of regions between adjacent heat transfer tubes 108a. Each heat transfer tube 108a extends along the Z-axis direction, and a fluid such as water supply or steam flows inside. The plurality of heat transfer tubes 108a are arranged side by side at predetermined intervals along a direction (X-axis direction) orthogonal to the Z-axis direction. The heat transfer tubes 108a adjacent to each other in the X-axis direction are joined to each other by performing fillet welding on the plate-shaped fins 108b. The fin 108b is formed with a plurality of through holes (openings) 108c into which the bolts 61 of the lifting jig 60 to be described later are inserted. The through hole 108c penetrates the fin 108b in the plate thickness direction (Y-axis direction). The through hole 108c is formed to have a diameter larger than that of a support portion side bolt hole 83 and a reinforcing member side through hole 94 described later. The through hole 108c may be, for example, an elliptical shape whose longitudinal direction is the Z-axis direction.

  Maintenance of the furnace wall panel 108 is performed at the time of periodic inspection of the boiler power plant 1. During this maintenance, all or part of the furnace wall panel 108 may be replaced. In such replacement of the furnace wall panel 108, the furnace wall panel 108 may be hoisted for installation, transportation, or the like of the furnace wall panel 108. Further, even when the boiler power plant 1 is newly installed, the furnace wall panel 108 may be lifted during installation or transportation. When hoisting the furnace wall panel 108, a hoisting jig (hereinafter simply referred to as “jig 60”) is attached to the furnace wall panel 108, and the furnace wall panel 108 is hoisted via the jig 60. . Specifically, a lifting device (not shown) such as a crane is attached to the jig 60 via a connecting hardware (shackle, wire, sling, chain, etc.), and the furnace wall panel 108 is driven by the driving force of the lifting device. Hoist.

Hereinafter, the jig 60 according to the present embodiment will be described. In this embodiment, the furnace wall panel 108, the jig 60, and the reinforcing member 90 form the support structure 100.
In the present embodiment, in order to lift the furnace wall panel 108, a plurality of jigs 60 (four as an example in the present embodiment) are attached to the furnace wall panel 108. Each jig 60 is provided on the main surface side of the furnace wall panel 108. Specifically, each jig 60 is provided near the four corners of the main surface of the furnace wall panel 108.
The main surface of the furnace wall panel 108 means a wide surface of the furnace wall panel 108 that constitutes the furnace 11 having a hollow rectangular shape. Specifically, in the present embodiment, the surface of the furnace wall panel 108 installed in the coal-fired boiler 10 facing the external space of the furnace 11 is the main surface. In this embodiment, it is a surface formed by the Z-axis direction and the X-axis direction. The main surface may be the surface facing the internal space of the furnace 11, which is the surface opposite to that of the present embodiment.
Further, in the present embodiment, an example in which the reinforcing member 90 is connected to each of the two jigs 60 provided at the same height position (position in the Z-axis direction) will be described. Note that the present disclosure is not limited to this, and even if a plurality (two in the present embodiment) of jigs 60 provided at substantially the same height position are connected to the reinforcing members 90 that are separately configured, respectively. Good.

As shown in FIG. 2, the reinforcing member 90 is provided along the back surface which is the surface opposite to the main surface of the furnace wall panel 108. Specifically, the reinforcing member 90 is provided on the surface of the back surface of the furnace wall panel 108 opposite to the main surface on which the jigs 60 provided at substantially the same height are provided. The longitudinal direction of the reinforcing member 90 extends in the X-axis direction.
In the present embodiment, the reinforcing member 90 is, for example, a so-called C-shaped channel material (groove-shaped steel) having a substantially C-shaped cross section in a plane orthogonal to the longitudinal direction. Specifically, the reinforcing member 90 includes a plate-shaped first plate portion 91 provided along the back surface, and a second plate portion 91 that is bent at a right angle from one end of the first plate portion 91 in the Z-axis direction and extends in the Y-axis direction. It integrally has a plate portion 92 and a third plate portion 93 that is bent at a substantially right angle from the other end of the first plate portion 91 in the Z-axis direction and extends in the Y-axis direction.
In the first plate portion 91, a plurality of reinforcing member-side through holes 94 (six in this embodiment, as an example) are formed so as to penetrate in the plate thickness direction (Y-axis direction). The plurality of reinforcing member-side through holes 94 are arranged side by side along the Z-axis direction at a predetermined interval, and the same plurality of reinforcing member-side through holes 94 are provided at a predetermined interval along the X-axis direction. Are arranged. Each reinforcing member side through hole 94 is formed at a position corresponding to the support portion side bolt hole 83, and the bolt 61 is inserted from the jig 60. Specifically, each reinforcing member side through hole 94 is arranged so as to overlap the support portion side bolt hole 83 when viewed from the Y-axis direction.
Note that the reinforcing member 90 is installed to suppress distortion deformation of the reinforcing member 90 when the furnace wall panel 108 is lifted up, and the reinforcing member 90 is not necessarily provided if distortion deformation of the furnace wall panel 108 is not a concern. Good.

Since the jigs 60 have the same structure, only one jig 60 will be described below, and description of the other jigs 60 will be omitted. Moreover, below, the jig | tool 60 in the state attached to the furnace wall panel 108 is demonstrated.
As shown in FIGS. 2 and 3, the jig 60 includes a plate-shaped hanging portion 70 to which a hoisting device (not shown) is attached, and a pair of supporting portions arranged so as to be sandwiched from both side surfaces of the hanging portion 70. 80, a bolt (engagement portion) 61 and a nut (engagement portion) 62 that sandwich and fasten the furnace wall panel 108 between the support portion 80 and the reinforcing member 90 described above.

The suspension part 70 extends so that the other end side where the suspension opening 72 is provided protrudes along the direction (Y-axis direction) orthogonal to the main surface of the furnace wall panel 108. In the present embodiment, the hanging portion 70 is arranged such that the longitudinal direction thereof is orthogonal to the X axis direction (that is, extends in the Z axis direction). As shown in FIG. 3, one end side of the hanging part 70 on the furnace wall panel 108 side has a front surface and a back surface of a part of the plate surface in the longitudinal direction extending in the Y-axis direction and the fixing part 81 of the pair of supporting parts 80. Are in contact. Further, the end portion on the one end side of the hanging portion 70 on the furnace wall panel 108 side projects toward the furnace wall panel 108 side more than the end portions of the fixed portions 81 of the pair of supporting portions 80 (hereinafter, the protruding portion is referred to as "Protrusion 71"). The protrusion 71 is fixed to the end of the fixed portion 81 of each support 80 by forming a weld W1 by fillet welding (see weld W1 in FIG. 3). The welded portion W1 is line-welded in the Z-axis direction, and the length of the protruding portion 71 protruding toward the furnace wall panel 108 side from the end portion of the fixed portion 81 is such that the welded portion W1 can be provided. Is.
The lifting portion 70 has a lifting opening 72 formed on the other end side opposite to the furnace wall panel 108 side. The suspension opening 72 penetrates in the plate thickness direction (X-axis direction in this embodiment). The suspension opening 72 is engaged with the suspension opening 72 by inserting a coupling hardware (shackle) or the like for coupling with a suspension device (not shown).

  The fixed portions 81 of the pair of support portions 80 are arranged so as to sandwich a part of one end side of the hanging portion 70, and are in surface contact with both front and back surfaces of the plate surface of the hanging portion 70, respectively. That is, in the pair of supporting portions 80, the fixing portion 81 is separated by the distance of the length of the hanging portion 70 in the plate thickness direction. In detail, the pair of support portions 80 are arranged so that fixed portions 81, which will be described later, face each other and are parallel to each other. Each of the support portions 80 has a symmetrical structure with respect to a YZ plane (a plane formed by the Y-axis direction and the Z-axis direction) passing through the center of the hanging portion 70 in the X-axis direction. Therefore, one support portion 80 will be described below, and the description of the other support portion 80 will be omitted.

  The support portion 80 is a member having a substantially L-shaped cross section in a plane orthogonal to the Z-axis direction. The supporting portion 80 is a plate-shaped fixing portion 81 that extends along the Y-axis direction and is fixed to the hanging portion 70, and is bent at a substantially right angle from an end portion of the fixing portion 81 on the furnace wall panel 108 side in the Y-axis direction. And a plate-shaped abutting portion 82 extending in an integral manner.

  As shown in FIG. 3, the plate portion of the fixing portion 81 is in surface contact with the plate surface of the hanging portion 70. The length of the fixed portion 81 in the Z-axis direction is longer than the length of the hanging portion 70 in the Z-axis direction. The fixed portion 81 has an end portion on the side opposite to the furnace wall panel 108 side fixed to the plate surface of the hanging portion 70 by fillet welding (see weld portion W2). The welded portion W2 is line-welded in the Z-axis direction (see FIG. 5).

  The contact portion 82 extends along the X-axis direction so as to be separated from the hanging portion 70 along the main surface of the furnace wall panel 108 from an end portion of the hanging portion 70 on the furnace wall panel 108 side. The contact portion 82 is arranged substantially parallel to the main surface of the furnace wall panel 108 when the jig 60 is attached to the furnace wall panel 108. Specifically, the contact portion 82 is arranged substantially parallel to the fin 108b of the furnace wall panel 108. The surface of the contact portion 82 on the furnace wall panel 108 side is in contact with part of the surface of the heat transfer tube 108 a of the furnace wall panel 108. Specifically, the contact portion 82 is in contact with a part of the surface of the two or more heat transfer tubes 108a arranged adjacent to each other in the X-axis direction.

As shown in FIG. 4, since the length L2 of the contact portion 82 in the X-axis direction is longer than the length L1 of the fixed portion 81 in the Y-axis direction, the contact portions 82 are adjacent to each other in the X-axis direction. It stably abuts a part of the surface of the heat transfer tubes 108a arranged side by side. The length L1 of the fixing portion 81 in the Y-axis direction is relatively short, the length of the fixing portion 81 protruding from the main surface of the furnace wall panel 108 is relatively short, and the jig 60 is unlikely to interfere with other members. Has become. Further, the length L2 of the contact portion 82 in the X-axis direction is set to be the distance L4 or more between the adjacent heat transfer tubes 108a of the furnace wall panel 108, so that the contact portion 82 is adjacent in the X-axis direction. It is possible to make contact with a part of the surface of two or more heat transfer tubes a arranged side by side. The separation distance L4 between the heat transfer tubes 108a indicates the distance between the central axes of the adjacent heat transfer tubes 108a.
Further, as shown in FIG. 5, the length L3 of the pair of abutting portions 82 in the X-axis direction is set to be at least three times the length L5 of the separation distance L4 between the adjacent heat transfer tubes 108a. The length L2 of the contact portion 82 in the X-axis direction is not more than three times the distance L4 between the adjacent heat transfer tubes 108a, and it is not necessary to lengthen the length L2 more than necessary. .
As shown in FIG. 4, the length L3 of the pair of abutting portions 82 in the X-axis direction is equal to the length L2 of the abutting portion 82 of each supporting portion 80 in the X-axis direction. It is the length including the distance.

  When the jig 60 is attached to the furnace wall panel 108, each abutting portion 82 has a plurality of support portion side bolt holes 83 penetrating in the plate thickness direction (Y-axis direction). One) is formed. The plurality of support portion side bolt holes 83 are arranged side by side at predetermined intervals along the Z-axis direction. The bolt 61 is inserted into each support portion side bolt hole 83.

  The method of manufacturing the support portion 80 is not particularly limited, but for example, it is manufactured by cutting a so-called C-shaped channel material (groove-shaped steel) having a cross section of a plane orthogonal to the longitudinal direction into a substantially C shape in half. Good. By manufacturing in this way, the support part 80 can be manufactured easily.

As shown in FIG. 3, the bolt 61 is inserted through the support portion side bolt hole 83, the through hole 108c formed in the fin 108b, and the reinforcing member side through hole 94. In this embodiment, six bolts 61 are provided. A nut 62 is screwed onto the tip of each bolt 61. The head portion of the bolt 61 is in contact with the contact portion 82 of the support portion 80. The nut 62 is in contact with the first plate portion 91 of the reinforcing member 90. By screwing the bolt 61 and the nut 62, the support portion 80 and the reinforcing member 90 are fastened and fixed via the fins 108b. Specifically, the support portion 80 and the reinforcing member 90 are fixed with the furnace wall panel 108 sandwiched therebetween. As a result, the support 80 and the reinforcing member 90 are fixed to the furnace wall panel 108 by the axial force of the bolt 61. The nut 62 may be fixed to the first plate portion 91 of the reinforcing member 90 in advance by spot welding or the like.
Note that, in the present embodiment, an example in which the bolt 61 and the nut 62 are applied as the engaging portion has been described, but the present disclosure is not limited to this. For example, the support portion 80 and the reinforcing member 90 may be fixed to each other by a double screw bolt and two nuts, or a rivet.
Further, the number of the bolts 61 that fix the supporting portion 80 and the reinforcing member 90 is not limited to the number of the present embodiment. The number of bolts 61 is determined by performing strength calculation from the weight of the furnace wall panel 108, the hole diameter of the through hole 108c formed in the fin 108b, and the like.

Next, the principle of attaching and detaching the jig 60 to and from the furnace wall panel 108 will be described.
First, the through holes 108c are formed in the fins 108b so as to communicate with the reinforcing member side through holes 94 formed in the reinforcing member 90 attached to suppress the strain deformation of the furnace wall panel 108 during lifting. Note that the reinforcing member 90 may not be necessarily provided when there is no concern about strain deformation of the furnace wall panel 108.
Next, a pair of supporting portions 80 welded and fixed to the hanging portion 70 is arranged at a predetermined position on the furnace wall panel 108. Specifically, each member is arranged so that the support portion side bolt hole 83, the through hole 108c formed in the fin 108b, and the reinforcing member side through hole 94 communicate with each other. Then, the bolt 61 is inserted through the support portion side bolt hole 83, the through hole 108c formed in the fin 108b, and the reinforcing member side through hole 94. Next, the tip of the bolt 61, the nut 62, the contact portion 82 of the support portion 80, and the first plate portion 91 of the reinforcing member 90 are attached to the surface of the furnace wall panel 108 (in this embodiment, one of the surfaces of the four heat transfer tubes 108a). Part) until it touches. As a result, the support portion 80 and the reinforcing member 90 are fixed with the furnace wall panel 108 sandwiched therebetween. Then, the jig 60 and the reinforcing member 90 are fixed to the furnace wall panel 108 by the axial force of the bolt 61. In this way, the jig 60 is attached to the furnace wall panel 108.
When all the jigs 60 are attached to the furnace wall panel 108, for example, a connecting metal object (shackle) is inserted through the hoisting openings 72 formed in the hoisting parts 70 of each jig 60 in order to connect the hoisting device. The furnace wall panel 108 is lifted by a lifting device such as a crane. In addition, the member to be inserted into the suspension opening 72 is not limited to the shackle. It suffices that the lifting opening 72 and the lifting device can be connected to each other. For example, a wire, a sling, or a chain may be used.
When the installation work of the furnace wall panel 108 is completed, the jig 60 is removed from the furnace wall panel 108. First, the bolt 61 is removed from the nut 62, and the fixing between the support portion 80 and the reinforcing member 90 is released. As a result, the fixing between the support portion 80 and the furnace wall panel 108 is also released. Next, the jig 60 is removed from the furnace wall panel 108. In this way, the jig 60 is removed from the furnace wall panel 108. When all the jigs 60 are removed, all the through holes 108c formed in the fins 108b are closed by welding or the like.

According to this embodiment, the following operational effects are exhibited.
In the present embodiment, the jig 60 is fixed to the furnace wall panel 108 by a bolt 61 and a nut 62 so as to be removable. Thus, the jig 60 and the furnace wall panel 108 are not fixed by welding.
For example, when fixing the jig to the heat transfer tube of the furnace wall panel by welding, when removing the jig from the furnace wall panel, for example, after installing the furnace wall panel, work to remove the welded portion with a grinder or the like. Need to do. Since the heat transfer tube is a pressure resistant part that becomes high temperature and high pressure during operation of the boiler, after the work of removing the welded part, the work of inspecting the welded part of the heat transfer tube for damage, etc., If any damage is found as a result of the inspection, it is necessary to repair the damage to the heat transfer tube. Therefore, for inspection and repair work, it is necessary to install a scaffold that can perform each work in the furnace of the boiler, etc., and the whole work becomes complicated, and the work after the installation of the furnace wall panel is long. There was a possibility of becoming.
On the other hand, in the present embodiment, as described above, the jig 60 and the furnace wall panel 108 are not fixed by welding. Accordingly, after the lifting work of the furnace wall panel 108 is completed, the jig 60 can be removed from the furnace wall panel 108 only by removing the joined state of the bolt 61 and the nut 62. That is, it is not necessary to perform the above-mentioned welding portion removing operation. Therefore, after the lifting work is completed, there is no need to inspect the welded portion for damage or the like in the heat transfer tube, or to repair the damage when there is damage. Further, even when it is necessary to install the scaffold in the furnace of the boiler or the like to receive the removed jig 60 and the reinforcing member 90, the work can be completed by providing the simple scaffold for a short time. Therefore, the work involved in lifting the furnace wall panel 108 can be simplified. Therefore, the entire work including the lifting work (for example, the work of installing the furnace wall panel 108) can be shortened.

In addition, in the present embodiment, the hanging portion 70 is fixed to the pair of supporting portions 80 that sandwich the hanging portion 70. Thereby, since the front and back of the plate surface of the hanging part 70 can be supported from both sides, the deformation of the hanging part 70 can be suppressed. Therefore, the furnace wall panel 108 can be lifted in a stable state.
In addition, in the present embodiment, the contact portion 82 of the support portion 80 extends along the main surface of the furnace wall panel 108, and the furnace wall panel 108 (in the present embodiment, a part of the surface of the four heat transfer tubes 108a). ) Is in contact with. Thereby, the area where the furnace wall panel 108 and the supporting portion 80 contact each other can be increased. Therefore, the support portion 80 can be stably fixed to the furnace wall panel 108. Therefore, the furnace wall panel 108 can be lifted in a stable state.

  Further, the jig 60 of the present embodiment is configured by a hanging portion 70 and a supporting portion 80 provided on the main surface side of the furnace wall panel 108. A reinforcing member 90 (C-shaped channel material) is provided on the back side of the furnace wall panel 108. As a result, the size on the jig 60 side can be suppressed as compared with, for example, a jig having a C-shaped channel material or the like on both the main surface and the back surface of the furnace wall panel 108 to form the hanging portion. Since the interference with the wall panel 108 is reduced and the jig 60 side is also much lighter than the C-shaped channel material, the fixing to the furnace wall panel 108 can be simplified. Therefore, the work of attaching the jig 60 and the work of removing the jig 60 can be facilitated. Further, the manufacturing cost of the jig 60 can be reduced.

  In the present embodiment, the length L1 of the fixed portion 81 in the Y-axis direction is formed shorter than the length L2 of the contact portion 82 in the X-axis direction. As a result, the length of the fixed portion 81 in the Y-axis direction is relatively short. That is, the length by which the fixing portion 81 projects from the main surface of the furnace wall panel 108 is relatively short. As a result, for example, when the furnace wall panel 108 to which the jig 60 is attached is transported or stored, interference between the jig 60 and the furnace wall panel 108 is suppressed. Therefore, the furnace wall panel 108 provided with the jig 60 can be easily handled. Further, when the plurality of furnace wall panels 108 provided with the jigs 60 are stacked flat, the occupied volume can be reduced. In addition, since it is difficult for the furnace wall panel 108 arranged below and the jig 60 to contact each other during flat stacking, damage to the furnace wall panel 108 and / or the jig 60 due to contact between the furnace wall panel 108 and the jig 60. Can be suppressed.

In the present embodiment, the length L2 of the abutting portion 82 in the X-axis direction is set to a distance L4 or more between the adjacent heat transfer tubes 108a of the furnace wall panel 108. Thereby, the area where the furnace wall panel 108 and the contact portion 82 contact each other can be increased. Therefore, the support portion 80 can be more stably abutted and fixed to a part of the surface of the heat transfer tube 108a of the furnace wall panel 108. Therefore, the furnace wall panel 108 can be lifted in a stable state.
Specifically, in this embodiment, the contact portion 82 is in contact with the two heat transfer tubes 108a. That is, the contact portion 82 is provided so as to straddle the two heat transfer tubes 108a. As a result, the contact portion 82 contacts the furnace wall panel 108 on the two contact lines, so that the support portion 80 can be made more stable.

  In the present embodiment, the length of the contact portion 82 in the X-axis direction is set to 3 times or less the distance between the adjacent heat transfer tubes 108a. As a result, the size of the support portion 80 becomes relatively small. Therefore, the jig 60 can be easily handled without using a lifting device or the like for the attachment / detachment work of the jig 60 itself. Therefore, the work of attaching and detaching the jig 60 to and from the furnace wall panel 108 can be facilitated.

In the present embodiment, the reinforcing member 90 is provided. Accordingly, when the furnace wall panel 108 is lifted, strain deformation of the furnace wall panel 108 can be suppressed.
Further, in the present embodiment, the contact portion 82 of the support portion 80 contacts the main surface of the furnace wall panel 108, and the reinforcing member 90 provided on the opposite side of the support portion 80 also faces the main surface of the furnace wall panel 108. It abuts the back of the side. Then, the contact portion 82 and the reinforcing member 90 are fixed by the bolt 61 that is inserted through the through hole 108c formed in the furnace wall panel 108. Thus, the furnace wall panel 108 can be supported from both sides of the furnace wall panel 108 so that the furnace wall panel 108 is sandwiched between the support portion 80 and the reinforcing member 90. Therefore, the jig 60 can be firmly fixed to the furnace wall panel 108.

[Second Embodiment]
Next, a second embodiment of the present disclosure will be described with reference to FIGS. 6 to 8. Note that the reinforcing member 90 is omitted in FIG.
The jig 120 of the present embodiment mainly differs from the jig 60 of the first embodiment in that a locking portion 110 is provided instead of the bolt 61 and the nut 62. In addition, since the support portion side bolt hole 83, the through hole 108c formed in the fin 108b, and the reinforcing member side through hole 94 are formed in the same shape as the first embodiment because the locking portion 110 is provided instead of the bolt 61. Is different. Since the other points are the same as those of the first embodiment, the same reference numerals are given to the same configurations, and detailed description thereof will be omitted.

  The support portion side bolt hole 115, the through hole (opening) 116 formed in the fin 108b, and the reinforcing member side through hole 117 according to the jig 120 of the present embodiment have substantially the same shape. As shown in FIG. 6, the support portion side bolt hole 115, the through hole 116 formed in the fin 108b, and the reinforcing member side through hole 117 have an oval shape whose longitudinal direction extends along the Z-axis direction. That is, the length L7 in the Z axis direction (first intersecting direction) of the support portion side bolt hole 115, the through hole 116 formed in the fin 108b, and the reinforcing member side through hole 117 is the X axis direction (second intersecting direction). Is longer than the length L8.

  As shown in FIG. 6, the locking portion (engagement portion) 110 includes a head portion 111 fixed to the support portion 80, and one end portion in the Y-axis direction fixed to the head portion 111, and the locking portion (engagement portion) 110 extends from the head portion 111 in the Y-axis direction. And a tip 113 fixed to the other end of the shaft 112 in the Y-axis direction.

  The head 111 has, for example, a cylindrical shape in which the central axis C extends along the Y-axis direction. The radial lengths of the head portion 111 (lengths in the X-axis direction and the Z-axis direction) are the X-axis direction of the support portion side bolt hole 115, the through hole 116 formed in the fin 108b, and the reinforcing member side through hole 117. Longer than. As shown in FIG. 7, the surface of the head portion 111 on the furnace wall panel 108 side is in contact with the contact portion 82. Further, after the locking portion 110 is attached at a predetermined position, the head portion 111 and the contact portion 82 are welded and fixed at the contact portion to prevent rotation (see weld portion W3). The head 111 does not have to have a cylindrical shape, and may have a polygonal prism shape, for example.

The shaft portion 112 is a columnar member that extends from the end of the head portion 111 in the Y-axis direction toward the furnace wall panel 108 along the Y-axis direction, and the shaft portion 112 and the head portion 111 are provided coaxially. Has been. That is, the central axis C of the shaft 112 coincides with the central axis C of the head 111.
The radial lengths of the shaft portion 112 (lengths in the X-axis direction and the Z-axis direction) are the X-axis direction of the support portion side bolt hole 115, the through hole 116 formed in the fin 108b, and the reinforcing member side through hole 117. And the length in the Z-axis direction. The shaft portion 112 is rotatable about the central axis C in a state where the shaft portion 112 is inserted through the support portion side bolt hole 115, the through hole 116 formed in the fin 108b, and the reinforcing member side through hole 117.

The tip portion 113 is a flat plate-shaped member, and the length in the longitudinal direction (Z-axis direction in FIG. 6, X-axis direction in FIG. 7) intersecting the Y-axis direction is such that the support-side bolt holes 115 and the fins 108b is shorter than the length L7 of the through hole 116 and the reinforcing member side through hole 117 in the Z-axis direction (first intersecting direction), and the support portion side bolt hole 115, the through hole 116, and the reinforcing member side through hole 117. Is longer than the length L8 in the X-axis direction (second crossing direction). The length L9 in the plate thickness direction (X-axis direction in FIG. 6) is the length L8 in the X-axis direction (second intersecting direction) of the support portion side bolt hole 115, the through hole 116, and the reinforcing member side through hole 117. Shorter than. As shown in FIG. 7, the surface of the tip portion 113 on the furnace wall panel 108 side is in contact with the first plate portion 91 of the reinforcing member 90. Further, after the locking portion 110 is attached at a predetermined position, the tip portion 113 and the first plate portion 91 are welded and fixed at the abutting portion to prevent rotation (see weld portion W4).
In addition, in the above description, the locking portion 110 and the other member are welded and fixed to each other at both the welded portion W3 and the welded portion W4 to prevent rotation, but the present disclosure is not limited thereto. Either one of the welded portion W3 and the welded portion W4 may be welded and fixed as a detent.

Next, the principle of attaching and detaching the jig 120 according to the present embodiment to the furnace wall panel 108 will be described.
First, as in the first embodiment, the fins of the furnace wall panel 108 are connected so as to communicate with the reinforcing member side through holes 117 formed in the reinforcing member 90 attached to suppress the distortion of the furnace wall panel 108 during lifting. A through hole 116 is formed in 108b. Next, the suspension 70 to which the pair of support portions 80 are fixed is placed at a predetermined position on the furnace wall panel 108. Specifically, each member is arranged so that the support portion side bolt hole 115, the through hole 116 formed in the fin 108b, and the reinforcing member side through hole 117 communicate with each other. Then, the locking portion 110 is inserted through the support portion side bolt hole 115, the through hole 116, and the reinforcing member side through hole 117. At this time, the orientation of the locking portion 110 is adjusted so that the longitudinal direction of the tip portion 113 is along the Z-axis direction. As a result, the tip portion 113 is inserted through the support portion side bolt hole 115, the through hole 116, and the reinforcing member side through hole 117. The head 111 is rotated about the central axis C with the tip 113 inserted through the reinforcing member side through hole 117. As a result, the longitudinal direction of the tip 113 becomes a direction not along the Z-axis direction, and the tip 113 does not come out of the reinforcing member side through hole 117. Still more preferably, by rotating 90 degrees, the longitudinal direction of the tip 113 becomes a direction along the X-axis direction, and the tip 113 does not come out stably from the reinforcing member side through hole 117. In this way, the locking portion 110 is attached to the predetermined position. The head 111 may rotate the tip 113 until the reinforcing member side through hole 117 is not parallel to the long hole direction, and more preferably is rotated in a state perpendicular to the reinforcing member side through hole 117. Preferably. In this state, the welded portion W3 and / or the welded portion W4 is welded and fixed as a detent. As a result, the locking portion 110 cannot rotate. As a result, the support portion 80 and the reinforcing member 90 are fixed with the furnace wall panel 108 sandwiched therebetween. Then, the support portion 80 and the reinforcing member 90 are fixed to the furnace wall panel 108 by the axial force of the locking portion 110. In this way, the jig 60 is attached to the furnace wall panel 108.

  When removing the jig 120, the welded portion W3 and / or the welded portion W4 is removed using a grinder or the like. Then, the tip portion 113 is pulled out from the through hole 116 formed in the fin 108b in the reverse order of the attachment. As a result, the fixing of the support portion 80 and the reinforcing member 90 to the furnace wall panel 108 is also released. Next, the jig 120 is removed from the furnace wall panel 108. In this way, the jig 120 is removed from the furnace wall panel 108. When all the jigs 120 are removed, all the through holes 116 formed in the fins 108b are closed by welding filling or the like. When removing the jig 120, the shaft 112 may be cut.

According to this embodiment, the following operational effects are exhibited.
In the present embodiment, the distal end portion 113 of the locking portion 110 has a length L6 in the longitudinal direction in the Z-axis direction of the support portion side bolt hole 115, the through hole 116 formed in the fin 108b, and the reinforcing member side through hole 117. Is shorter than the length L7. Therefore, the tip portion 113 can be inserted through the support portion side bolt hole 115, the through hole 116, and the reinforcing member side through hole 117 in a state where the longitudinal direction and the Z-axis direction match. The length L6 in the longitudinal direction of the tip portion 113 is longer than the length L8 in the X-axis direction of the support portion side bolt hole 115, the through hole 116 and the reinforcing member side through hole 117. Therefore, the tip portion 113 defines an edge portion (that is, one of the fins 108b that defines the support portion side bolt hole 115, the through hole 116, and the reinforcing member side through hole 117 in a state where the longitudinal direction and the X-axis direction coincide with each other. Part). Therefore, in this state, the support portion side bolt hole 115, the through hole 116, and the reinforcing member side through hole 117 cannot be inserted. In this way, the tip portion 113 can switch between a state in which the support portion side bolt hole 115, the through hole 116 and the reinforcing member side through hole 117 can be inserted and a state in which they cannot be inserted. In detail, it can be switched by rotating the tip 113 about the central axis C.

  From the above, in the present embodiment, by inserting the tip portion 113 into the support portion side bolt hole 115, the through hole 116 formed in the fin 108b and the reinforcing member side through hole 117, and then rotating the tip portion 113, The distal end portion 113 and the reinforcing member 90 can be brought into the engaged state. Further, when the tip portion 113 and the reinforcing member 90 are in the engaged state, the furnace wall panel 108 can be lifted. The operation of rotating the tip portion 113 can be performed from the jig 120 side of the furnace wall panel 108. Therefore, most of the work of attaching and removing the jig 120 to the furnace wall panel 108 can be performed from the jig 120 side of the furnace wall panel 108. Therefore, it is possible to shorten the work flow line length of the worker and make the attachment and detachment work of the jig 120 efficient.

In this embodiment, as shown in FIG. 8, the reinforcing member 90 may be omitted. In this case, the head portion 111 and the contact portion 82 are welded and fixed at the welded portion W3, and the tip portion 113 and the fin 108b are not welded and fixed. The surface of the tip portion 113 on the furnace wall panel 108 side is in contact with the plate surface of the fin 108b or the heat transfer tube 108a.
With this configuration, it is possible to complete the work of attaching and detaching the jig 120 to and from the furnace wall panel 108 on the jig 120 side of the furnace wall panel 108. Therefore, it is not necessary to perform the work on the side opposite to the jig 120 side of the furnace wall panel 108, so that the work flow length of the worker can be further shortened, and the work for attaching and removing the jig 120 can be made more efficient. You can

[First Reference Example]
Next, the first reference example will be described.
As shown in FIGS. 9 and 10, the jig 200 according to the first reference example is different from the first embodiment in that a plate-shaped support plate 201 is provided instead of the pair of support portions 80. Further, the suspension 70 is different from the first embodiment in that the suspension 70 is welded and fixed to a substantially central region of the support plate 201. The same components as those in the first embodiment are designated by the same reference numerals, and detailed description thereof will be omitted.

  As shown in FIGS. 9 and 10, the support plate 201 is provided along the main surface of the furnace wall panel 108. Three bolt holes 202 are formed at both ends of the support plate 201 in the X-axis direction and are arranged side by side at predetermined intervals in the Z-axis direction. Each bolt hole 202 penetrates in the plate thickness direction (Y-axis direction). As shown in FIG. 10, the length of the support plate 201 in the X-axis direction is set to a length L10 or more that is twice the distance L4 between the adjacent heat transfer tubes 108a. Further, the suspension part 70 is welded and fixed to a substantially central region so as to be orthogonal to the support plate 201 (see welded portion W5). The support plate 201 is fastened and fixed to the reinforcing member 90 by bolts (not shown) inserted through the bolt holes 202.

  Even with such a configuration, the jig 200 and the furnace wall panel 108 can be configured to be not fixed by welding. Therefore, the work involved in lifting the furnace wall panel 108 can be simplified.

[Second reference example]
Next, a second reference example will be described.
The jig according to the second reference example has one support portion 80 in the jig 60 according to the first embodiment. That is, the supporting portion 80 is welded and fixed to only one side of the hanging portion 70.

  It should be noted that the present disclosure is not limited to the above-described embodiment, and can be appropriately modified without departing from the gist thereof.

  For example, in each of the above-described embodiments, an example in which the jig 60 is provided on the furnace wall panel 108 has been described, but the present disclosure is not limited to this. The object to which the jig 60 is provided may be the furnace wall panel 108, and may be, for example, the heat transfer tube panel that constitutes the reheaters 105 and 106 and the superheaters 102, 103 and 104.

  For example, in each of the above-described embodiments, an example in which the hanging portion 70 and the fixing portion 81 are fixed by welding is described, but the present disclosure is not limited to this. For example, the suspension part 70 and the fixing part 81 may be fixed by a fastening member such as a bolt.

The jig and the support structure described in each of the embodiments described above are understood as follows, for example.
A jig according to an aspect of the present disclosure is a jig (60, 120) for lifting a heat transfer tube panel (108) in which a plurality of heat transfer tubes (108a) are arranged side by side, and the heat transfer tube panel (108). ), Which extends so as to project in a predetermined direction (Y-axis direction) that intersects with the main surface of FIG. And a pair of supporting portions (80) fixed to the heat transfer tube panel (108) by using engaging portions (61, 62, 110), each supporting portion (80) being the predetermined one. A fixing part (81) extending in the direction (Y-axis direction) and fixed to the suspension part (70), and orthogonal to the predetermined direction (Y-axis direction) from the fixing part (81) along the main surface. It extends in one direction (X-axis direction) away from the suspension part (70) and Has abutment portion abutting the tube panel (108) and (82), the.

In the above structure, the jig is fixed to the heat transfer tube panel by the engaging portion. Thus, the jig and the heat transfer tube panel are not fixed by welding. With this, when the jig is removed from the heat transfer tube panel after the lifting operation of the heat transfer tube panel is completed, it is not necessary to perform the work of removing the welded portion. Therefore, after the lifting work is completed, there is no need to inspect the welded portion for damage or the like, or to repair damage when there is damage. Therefore, it is possible to simplify the work involved in the jig attachment and removal steps of the lifting work of the heat transfer tube panel. Therefore, the entire work time including the lifting work (for example, the work of installing the heat transfer tube panel) can be shortened.
Moreover, in the said structure, a suspension part is being fixed to a pair of support part which sandwiches this suspension part. With this, since the hanging part can be supported from both sides, it is possible to suppress deformation of the hanging part caused by a load applied when the hoisting device is pulled up. Therefore, the heat transfer tube panel can be lifted in a stable state.
Further, in the above-mentioned configuration, the contact portion of the support portion extends along the main surface of the heat transfer tube panel and is in contact with the heat transfer tube panel. Thereby, the area where the heat transfer tube panel and the support portion contact each other can be increased. Therefore, the support portion can be stably brought into contact with and fixed to the heat transfer tube panel. Therefore, the heat transfer tube panel can be lifted in a stable state.
Moreover, it is comprised by the suspension part and a pair of support parts. Accordingly, for example, as compared with a jig having a C-shaped channel material or the like on both panel surfaces of the heat transfer tube panel, the jig can be lightened with a simpler configuration. Therefore, the work of attaching the jig and the work of removing the jig can be facilitated. Also, the manufacturing cost of the jig itself can be reduced.
The main surface of the heat transfer tube panel means a wide surface of the heat transfer tube panel. Specifically, the main surface extends in a heat transfer tube panel in which a plurality of heat transfer tubes are arranged side by side along a direction intersecting the extending direction of the heat transfer tubes (hereinafter, referred to as “arrangement direction”). It means a surface formed by the direction and the arrangement direction.

  Further, in the jig according to one aspect of the present disclosure, the length (L1) of the fixing portion (81) in the predetermined direction (Y-axis direction) is the same as the one direction (X-axis) of the contact portion (82). Direction) shorter than the length (L2).

  In the above configuration, the fixed portion is formed to have a relatively short length in the predetermined direction. That is, the length by which the fixing portion projects from the panel surface of the heat transfer tube panel is relatively short. Accordingly, for example, when the heat transfer tube panel with the jig attached is transported or stored, the jig is unlikely to interfere with other members existing in the vicinity of the heat transfer tube panel. Therefore, the heat transfer tube panel provided with the jig can be easily handled. Further, when the heat transfer tube panels provided with the jig are stacked flat, the occupied volume can be reduced. Further, since it is difficult for the heat transfer tube panel disposed below and the jig to come into contact with each other during flat stacking, damage to the heat transfer tube panel and / or the jig due to contact between the heat transfer tube panel and the jig can be suppressed. . Further, the supporting portion can be more stably abutted and fixed to the surface of the heat transfer tube of the furnace wall panel.

  Further, in the jig according to one aspect of the present disclosure, the length (L2) of the contact portion (82) of the support portion (80) in the one direction (X-axis direction) is equal to that of the adjacent heat transfer tube ( 108a) is longer than the distance (L4) between them.

  With the above configuration, it is possible to increase the area in which the heat transfer tube panel and the contact portion come into contact with each other. Therefore, the support portion can be more stably abutted and fixed to the heat transfer tube panel. Therefore, the heat transfer tube panel can be lifted in a stable state.

  Further, in the jig according to one aspect of the present disclosure, the length (L2) of the contact portion (82) of the support portion (80) in the one direction (X-axis direction) is equal to that of the adjacent heat transfer tube ( 108a) is shorter than three times the distance (L4) between them.

  In the above configuration, the length of the contact portion in one direction is 3 times or less the distance between the adjacent heat transfer tubes. As a result, the size of the support portion becomes relatively small. Therefore, the jig can be reduced in size and weight and easily handled. Therefore, the work of attaching the jig to the heat transfer tube panel can be facilitated.

  Further, a jig according to an aspect of the present disclosure is in contact with a surface of the supporting portion (80) opposite to the main surface with the heat transfer tube panel (108) interposed therebetween, and the heat transfer tube panel (108). A reinforcing member (90) for reinforcing the member, the contact portion (82) and the reinforcing member (90) being inserted through the openings (108c, 116) formed in the heat transfer tube panel (108). It is fixed by the joints (61, 62, 110).

In the above structure, the reinforcing member is provided on the back surface side of the surface opposite to the main surface of the heat transfer tube panel. This makes it possible to suppress deformation of the heat transfer tube panel when the heat transfer tube panel is lifted.
Further, in the above configuration, the contact portion of the support portion contacts the heat transfer tube panel, and the reinforcing member provided on the opposite side of the support portion also contacts the heat transfer tube panel. Then, the abutting portion and the reinforcing member are fixed by the engaging portion that is inserted through the opening formed in the heat transfer tube panel. Accordingly, the heat transfer tube panel can be supported from both sides such that the heat transfer tube panel is sandwiched between the support portion and the reinforcing member. Therefore, the jig can be firmly fixed to the heat transfer tube panel.

  In addition, in the jig according to one aspect of the present disclosure, the engaging portion (110) has a head portion (111) that is locked to the support portion (114) and one end portion that is formed on the head portion (111). A shaft part (112) which is fixed and extends in the predetermined direction (Y-axis direction) from the head part (111) and is inserted through an opening (116) formed in the heat transfer tube panel (108), and the shaft part (112). ), Which is fixed to the other end in the predetermined direction (Y-axis direction), and the front-end portion (113) intersects with the predetermined direction (Y-axis direction). Has a length (L6) shorter than a length (L7) of the opening (116) in a first intersecting direction intersecting the predetermined direction (Y-axis direction), and the opening (116) has the predetermined direction (Y). It is longer than the length (L8) in the second intersecting direction that intersects the first intersecting direction).

In the above configuration, the tip portion of the engaging portion has a length in the intersecting direction shorter than the length of the opening in the first intersecting direction. Therefore, the tip portion can be inserted through the opening in a state where the intersecting direction and the first intersecting direction coincide with each other. In addition, the length of the tip portion in the crossing direction is longer than the length of the opening in the second crossing direction. Therefore, the tip portion defines an opening (that is, a part of the heat transfer tube panel) in a state where the crossing direction and the first crossing direction do not match, and more preferably, the second crossing direction does match. Engage with. Therefore, in this state, the opening cannot be inserted. In this way, the tip portion can switch between a state where the opening can be inserted and a state where the opening cannot be inserted. In detail, by rotating the tip portion with the predetermined direction as the central axis, it is possible to switch between a state where the tip portion engages with the heat transfer tube panel and a state where the tip portion does not engage with the heat transfer tube panel.
From the above, in the above configuration, the tip portion and the heat transfer tube panel can be brought into an engaged state by inserting the tip portion into the opening and then rotating the tip portion. Further, when the tip portion and the heat transfer tube panel are in the engaged state, the heat transfer tube panel can be lifted. The operation of rotating the tip portion can be performed from the jig side of the heat transfer tube panel. Therefore, on the jig side of the heat transfer tube panel, the work of attaching the jig to the heat transfer tube panel can be completed. Therefore, it is not necessary to perform the work on the side opposite to the jig side of the heat transfer tube panel, so that the mounting work can be made efficient.

  Further, in the jig according to one aspect of the present disclosure, the heat transfer tube panel (108) is a furnace wall panel (108) applied to a wall portion (101) of a furnace (11) of a boiler power plant (1). is there.

  With the above configuration, when the furnace wall panel is installed, the work involved in lifting the furnace wall panel can be simplified, so that the installation work can be shortened. Further, in the hoisting work of the furnace wall panel, the heat transfer tube panel can be hoisted in a stable state.

  Further, in the jig according to one aspect of the present disclosure, the heat transfer tube panel (108) includes a plurality of the heat transfer tubes (108a) arranged side by side, and the adjacent heat transfer tubes (108a) are connected to each other. It has a fin (108b).

With the above configuration, the heat transfer tube panel including the fins and the heat transfer tube can be lifted in a stable state.

  A support structure according to an aspect of the present disclosure includes the jig (60, 120) described in any one of the above, and a heat transfer tube panel (108) supported by the jig (60, 120). I have it.

1: Boiler power plant 10: Coal-fired boiler 11: Furnace 12: Combustion device 13: Combustion gas passage 14: Flue 21: Combustion burner 22: Combustion burner 23: Combustion burner 24: Combustion burner 25: Combustion burner 26: Pulverized coal Supply pipe 27: Pulverized coal supply pipe 28: Pulverized coal supply pipe 29: Pulverized coal supply pipe 30: Pulverized coal supply pipe 31: Crusher 32: Crusher 33: Crusher 34: Crusher 35: Crusher 36: Windbox 37: air duct 38: forced draft fan 39: additional air port 40: additional air duct 41: gas duct 42: air heater 43: denitration device 44: dust collector 46: desulfurization device 50: chimney 60, 120: jig 61: bolt (Engagement part)
62: Nut (engagement portion)
70: Suspended part 71: Projected part 72: Suspended opening 80: Support part 81: Fixed part 82: Contact part 83,115: Support part side bolt hole 90: Reinforcement member 91: First plate part 92: Second plate Part 93: Third plate part 94, 117: Reinforcing member side through hole 100: Support structure 101: Furnace wall (wall part)
102: first superheater 103: second superheater 104: third superheater 105: first reheater 106: second reheater 107: economizer 108: furnace wall panel (heat transfer tube panel)
108a: Heat transfer tube 108b: Fins 108c, 116: Through hole (opening)
110: Locking part (engaging part)
111: Head part 112: Shaft part 113: Tip part 200: Jig 201: Support plate 202: Bolt hole W1: Welding part W2: Welding part W3: Welding part W4: Welding part W5: Welding part

Claims (9)

A jig for lifting a heat transfer tube panel in which a plurality of heat transfer tubes are arranged side by side,
A hanging part that extends so as to project in a predetermined direction intersecting with the main surface of the heat transfer tube panel and to which a lifting device is attached.
A pair of support portions that are arranged so as to be sandwiched from both sides with respect to the suspension portion and that are fixed to the heat transfer tube panel using an engaging portion,
Each of the support portions extends in the predetermined direction and is fixed to the hanging portion, and extends from the fixing portion along the main surface so as to separate from the hanging portion in one direction orthogonal to the predetermined direction. And a contact portion that contacts the heat transfer tube panel.   The jig according to claim 1, wherein a length of the fixing portion in the predetermined direction is shorter than a length of the abutting portion in the one direction.   The jig according to claim 1 or 2, wherein a length of the contact portion of the support portion in the one direction is longer than a distance between the adjacent heat transfer tubes.   The jig according to any one of claims 1 to 3, wherein a length of the abutting portion of the supporting portion in the one direction is shorter than three times a distance between the adjacent heat transfer tubes. A reinforcing member is provided that abuts a surface of the support portion opposite to the main surface with the heat transfer tube panel interposed therebetween, and reinforces the heat transfer tube panel.
The jig according to any one of claims 1 to 4, wherein the abutting portion and the reinforcing member are fixed by the engaging portion that is inserted through an opening formed in the heat transfer tube panel. The engaging portion includes a head portion that is locked to the support portion, and a shaft that has one end fixed to the head portion and extends from the head portion in the predetermined direction to pass through an opening formed in the heat transfer tube panel. And a tip end fixed to the other end of the shaft in the predetermined direction,
The tip portion has a length in an intersecting direction intersecting with the predetermined direction shorter than a length in a first intersecting direction intersecting with the predetermined direction of the opening, and the tip portion has the predetermined direction of the opening and the first intersecting direction. The jig according to any one of claims 1 to 5, which is longer than the length in the second intersecting direction where the jigs intersect.   The jig according to any one of claims 1 to 6, wherein the heat transfer tube panel is applied to a wall portion of a furnace of a boiler power generation plant.   The jig according to any one of claims 1 to 7, wherein the heat transfer tube panel has a plurality of the heat transfer tubes arranged side by side, and has fins that connect the adjacent heat transfer tubes. The jig according to any one of claims 1 to 8,
And a heat transfer tube panel supported by the jig.

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