JPS6142675Y2 - - Google Patents
Info
- Publication number
- JPS6142675Y2 JPS6142675Y2 JP1982043029U JP4302982U JPS6142675Y2 JP S6142675 Y2 JPS6142675 Y2 JP S6142675Y2 JP 1982043029 U JP1982043029 U JP 1982043029U JP 4302982 U JP4302982 U JP 4302982U JP S6142675 Y2 JPS6142675 Y2 JP S6142675Y2
- Authority
- JP
- Japan
- Prior art keywords
- formwork
- door
- cylinder
- tapered
- expansion
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
- 238000009415 formwork Methods 0.000 claims description 56
- 238000010521 absorption reaction Methods 0.000 claims description 8
- 238000010276 construction Methods 0.000 claims description 6
- 239000011823 monolithic refractory Substances 0.000 claims description 3
- 239000000463 material Substances 0.000 description 12
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 11
- 229910000831 Steel Inorganic materials 0.000 description 8
- 238000000034 method Methods 0.000 description 8
- 239000010959 steel Substances 0.000 description 8
- 238000013007 heat curing Methods 0.000 description 6
- 238000001723 curing Methods 0.000 description 5
- 238000003825 pressing Methods 0.000 description 5
- 238000010438 heat treatment Methods 0.000 description 3
- 239000011465 paving brick Substances 0.000 description 3
- 230000002159 abnormal effect Effects 0.000 description 2
- 239000011449 brick Substances 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 238000007664 blowing Methods 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000011017 operating method Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 239000003566 sealing material Substances 0.000 description 1
Landscapes
- Casting Support Devices, Ladles, And Melt Control Thereby (AREA)
- Furnace Housings, Linings, Walls, And Ceilings (AREA)
Description
【考案の詳細な説明】
本考案は、主に、溶銑鍋あるいは、溶鋼鍋など
の溶融金属収容容器の内張りを、不定形耐火物で
流し込み施工する際に使用される型枠に関し、加
熱養生中に熱膨張によつて変形せず、かつ、簡単
に脱枠できる。改良された型枠を提供することを
目的とするものである。[Detailed description of the invention] The present invention mainly relates to formwork used when lining molten metal containers such as hot metal pots or molten steel pots by pouring monolithic refractories. It does not deform due to thermal expansion and can be easily removed from the frame. The purpose is to provide an improved formwork.
従来、取鍋の内張りを施工する方法としては、
いわゆる、スリンガー方式が採用されていたが、
大型の装置を必要とし設備費も高いので、最近で
は比較的小規模の装置でもできる流し込み施工法
が実用化されている。その具体的な手順として
は、あらかじめ敷をレンガ張りした取鍋鉄皮の中
心に、一般に逆截頭直円錐状の型枠をセツトした
のち、環状の隙間に、５〜８重量％の水分を添
加、混練した周知のジルコン質、あるいはハイア
ルミナ質などの流し込み用不定形耐火物（以下、
単に材料という）を振動充填したのち、そのまま
３〜４時間保持して完全に硬化させてから脱枠
し、さらに乾燥、予熱後受鋼している。 Traditionally, the method of constructing the lining of a ladle is as follows:
The so-called slinger method was used,
Since large-scale equipment is required and equipment costs are high, pouring construction methods have recently been put into practical use that can be performed using relatively small-scale equipment. The specific procedure is to set a formwork, generally in the shape of an inverted truncated right cone, in the center of a ladle shell with a brick-lined surface in advance, and then pour 5 to 8% moisture by weight into the annular gap. Castable monolithic refractories (hereinafter referred to as
After the material (simply referred to as "material") is filled by vibration, the material is held as it is for 3 to 4 hours to completely harden, and then removed from the frame, and further dried and preheated before receiving the steel.
しかし、最近では使用中の剥離防止のため硬化
剤として周知のセメントを約５重量％配合してい
るので、とくに冬期に外気温が低くなると、その
養生時間（流し込み終了から完全に硬化するまで
の保持時間）が25〜30時間にもなり、取鍋の回転
（やりくり）に支障が出ることがあつた。この対
策としては型枠内に200〜300℃の熱風を送り込ん
で、いわゆる、加熱養生することが最近行なわれ
るようになつたので、従来どおりの時間で養生す
ることができるようになつた。しかし、かゝる加
熱養生中に熱膨張によつて型枠が変形し、ひどい
場合には数回使用しただけで破損してしまうな
ど、その耐用性が低下するうえに、養生中に型枠
が膨張し、内張りとぴつたり密着しているので脱
枠するのに手間がかかり、場合によつては、せつ
かく施工した内張りを破損することがあるなどの
問題が出てきた。 However, recently, in order to prevent peeling during use, approximately 5% by weight of cement, which is well known as a hardening agent, has been added to the mix. The holding time was as long as 25 to 30 hours, which sometimes caused problems in rotating the ladle. As a countermeasure to this problem, it has recently become possible to heat and cure the mold by blowing hot air at 200 to 300 degrees Celsius into the formwork, making it possible to cure the mold in the same amount of time as before. However, during such heat curing, the formwork deforms due to thermal expansion, and in severe cases, it may break after just a few uses, reducing its durability. Because it expands and is in close contact with the lining, it takes time to remove the frame, and in some cases, problems have arisen, such as the lining that has been painstakingly installed may be damaged.
これらの問題解決に利用できそうな先行技術と
して、本出願人らによる、たとえば、逆円錐台形
状の型枠を垂直に２〜６分割し、それらの内側
に、油圧シリンダーを放射状に配設して伸縮機構
を形成し、さらに、外周部に分割型の間の開口部
（隙間）を密閉する蓋板を取り付け、施工部の大
きさに合せてその直径を調節できるようにした、
〓流し込み施工用分割型枠〓（特願昭56−74450号
明細書）がある。しかし、この型枠では、加熱に
よる異常膨張を自動的に吸収できないので、やは
り変形や局部的な破損が発生する恐れがある。 As a prior art that can be used to solve these problems, the present applicant et al. has developed a method in which, for example, an inverted truncated cone-shaped formwork is vertically divided into 2 to 6 parts, and hydraulic cylinders are arranged radially inside the parts. It forms an expansion and contraction mechanism, and a cover plate is attached to the outer periphery to seal the opening (gap) between the split molds, so that the diameter can be adjusted according to the size of the construction area.
There is a split formwork for pouring construction (Japanese Patent Application No. 74450/1983). However, since this formwork cannot automatically absorb abnormal expansion due to heating, there is still a risk of deformation or local damage.
このような状況に対して、本考案者らは種々研
究した結果、これらの問題点をすべて解決できる
改良された型枠を完成したのであつて、その要点
は、軸方向に設けた内広がりのテーパー部に、水
平断面がほぼ台形状の扉部を取り付けるととも
に、内設した支持部材に装着したシリンダー先端
のリンク機構を、その扉部と型枠に連結して、膨
張吸収機構を設けた点であつて、加熱養生中に型
枠に発生する異常な応力を適度に吸収し、変形を
防止することができる流し込み施工用型枠を提供
するものである。 In response to this situation, the inventors of the present invention have conducted various studies and have completed an improved formwork that can solve all of these problems. A door section with an approximately trapezoidal horizontal section is attached to the tapered section, and a link mechanism at the tip of the cylinder attached to an internal support member is connected to the door section and the formwork to provide an expansion absorption mechanism. The present invention provides a formwork for pouring construction that can appropriately absorb abnormal stress generated in the formwork during heat curing and prevent deformation.
以下に、本考案の一実施例を示す図面にもとづ
いて本考案の型枠を詳細に説明する。 EMBODIMENT OF THE INVENTION Below, the formwork of this invention is demonstrated in detail based on the drawing which shows one Example of this invention.
第１図およびそのＡ−Ａ水平断面を示す第３図
において、１は取鍋、２はその鉄皮、３および４
は、あらかじめ常法によつて施工しそれぞれ敷レ
ンガと側壁の断熱レンガ、５は鉄皮２の中心にセ
ツトした本考案の型枠であつて、一般には、中空
の逆截頭直円錐状であるが、鍋の形状に応じて円
筒状でもよく、いずれもリング状の骨組６の外側
に厚さ９〜12mmの鋼板を曲面状に溶接してある。
そして該型枠の高さは、一般に、施工しようとす
る取鍋１の深さに応じてその1/3〜1/4とし、型枠
５が逆截頭直円錐状の場合、若干直径の異なるも
のを所要数重ねて使用する。７はリング状のシー
ル材であつて、最下段の型枠５の下部に嵌め込ん
であり、敷レンガ３との隙間をなくするものであ
る。８は型枠５の内側に設けた膨張吸収機構であ
つて、次のように構成されている。すなわち、テ
ーパー部９は型枠５の鋼板をその中心軸方向に上
下同じ巾または、必要に応じて、やや下すぼみ状
で、いずれも内広がり状に切り開いたものであつ
て、テーパー面１０ａ，１０ｂはとくに丈夫で、
平滑な鋼板で製作されており、テーパー面１０ｂ
の外側にはストツパー１１を設けてある。なお、
テーパー部９の巾は、型枠５の直径が約４ｍの場
合、計算上ではその約0.3％の12mmで十分である
が、それではあまりに小さくてテーパー部９およ
び後述する扉部１２などを製作しにくいし、強度
的にも問題があるので、経験上100〜300mm程度が
良い。また、その先端の角度αは30〜45゜が適当
である。なぜならば、30゜未満ではあまりにとが
りすぎて、先端が変形しやすいし、45゜をこえる
と加熱養生時外側が拘束された型枠５に作用する
応力Fe４（以下、単に、型枠５の応力Feとい
う）がスムーズに扉部１２に伝わらないからであ
る。なお、扉部１２は丈夫な鋼板を熔接した水平
断面がほぼ台形状（但し、その上辺に相当する外
面は、若干曲面状である。）のものであつて、長
さ（高さ）は型枠５とほぼ同じで、かつ傾斜面１
３ａ，１３ｂは扉部１２がテーパー部９にきつち
りと嵌め込まれるように鈍角状（90゜＋α）であ
つて、型枠５の内側に開閉できるように、一方の
テーパー面１０ａの上下部に軸支してある。 In Fig. 1 and Fig. 3 showing its A-A horizontal cross section, 1 is a ladle, 2 is its iron shell, 3 and 4
5 is the formwork of the present invention, which has been constructed in advance by a conventional method and is set at the center of the paving bricks and side wall insulation bricks, and 5 is the formwork of the present invention, which is set at the center of the steel shell 2, and is generally in the shape of a hollow inverted truncated right cone. However, it may be cylindrical depending on the shape of the pot, and in either case, a steel plate with a thickness of 9 to 12 mm is welded to the outside of the ring-shaped frame 6 in a curved shape.
The height of the formwork is generally 1/3 to 1/4 depending on the depth of the ladle 1 to be constructed, and if the formwork 5 is in the shape of an inverted truncated right cone, the height is slightly smaller than the diameter. Use the required number of different ones. Numeral 7 is a ring-shaped sealing material that is fitted into the lower part of the lowermost formwork 5 to eliminate the gap between it and the paving bricks 3. Reference numeral 8 denotes an expansion absorption mechanism provided inside the formwork 5, and is constructed as follows. That is, the tapered part 9 is formed by cutting the steel plate of the formwork 5 in the direction of its central axis, having the same width above and below, or, if necessary, a slightly downward concave shape, in both cases widening inwards. 10b is especially durable,
Made of smooth steel plate, tapered surface 10b
A stopper 11 is provided on the outside. In addition,
When the diameter of the formwork 5 is about 4 m, the width of the tapered part 9 is calculated to be 12 mm, which is about 0.3% of that width, but that is too small and the width of the tapered part 9 and the door part 12, which will be described later, is sufficient. It is difficult and there are problems with strength, so from experience it is best to use a length of 100 to 300 mm. Further, the angle α of the tip is suitably 30 to 45 degrees. This is because if it is less than 30 degrees, it becomes too sharp and the tip is easily deformed, and if it exceeds 45 degrees, the stress Fe4 (hereinafter simply referred to as stress on the form 5) that acts on the formwork 5 whose outside is restrained during heat curing is This is because Fe (referred to as Fe) is not transmitted smoothly to the door portion 12. The door section 12 is made of strong steel plates welded together and has an almost trapezoidal horizontal cross section (however, the outer surface corresponding to the upper side is slightly curved), and the length (height) varies depending on the shape. Almost the same as frame 5, and slope 1
3a and 13b have an obtuse angle (90°+α) so that the door portion 12 is tightly fitted into the tapered portion 9, and are provided at the upper and lower portions of one tapered surface 10a so that the door portion 12 can be opened and closed inside the formwork 5. It is pivoted.
１４は弾力性のある支持部材であつて、やや巾
広の鋼板（厚さ約20mm、巾約300mm）をほぼ〓状
に屈曲したものを型枠５の内側に、一方はテーパ
ー部９（扉部１２）をまたぐように、他方はそれ
と対称的にそれぞれ、上下に並べて水平に固設し
てあり、弾性限界内で自由に変形することができ
る。１５は三角形状の取付部材であつて、テーパ
部９側の支持部材１４にほぼ水平に熔接してあ
り、その先端に周知のシリンダー１６を水平、あ
るいは若干傾め下向きに軸支してある。なお、シ
リンダー１６は一般には内径が約200mm、ストロ
ーク約150mm、作動圧５Kg／cm2程度のエアーシリ
ンダーが用いられるが、必要に応じて、内径40mm
程度の油圧シリンダーを用いると、後述するよう
に、周知のレリーフ弁（図示せず）を使用して膨
張吸収機構８をいつそう正確に作動させることが
できる。１７ａ，１７ｂは長さ約400mmの腕状部
材であつて、ピストン軸１８の先端に設けたＹ字
状のリンク機構１９を構成しており、各先端を型
枠５および扉部１１の内側に軸支してある。２０
は周知の空冷機構付の電磁式振動機（振動数
3600v.p.m.振巾0.2〜0.5mm）であつて、型枠５の
内側に普通４基等間隔で固設してある。また、前
記の支持部材１４の間には、必要に応じて、やや
直径が大きくかつ扉部１２とほぼ同じ長さ（高
さ）の熱風導管２１（仮想線で示す）を垂直に熔
接してあるが、熱効率を上げるためにその下端な
どに前記のような円盤状の熱風案内板２２を設け
るとよい。 Reference numeral 14 denotes a resilient support member, which is a slightly wide steel plate (approximately 20 mm thick and 300 mm wide) that is bent into a nearly round shape and is placed inside the formwork 5. One is attached to the tapered part 9 (door 12), and the other is symmetrically arranged vertically and fixed horizontally, and can be freely deformed within elastic limits. A triangular mounting member 15 is welded almost horizontally to the support member 14 on the side of the tapered portion 9, and a well-known cylinder 16 is pivoted horizontally or slightly inclined downward at its tip. The cylinder 16 is generally an air cylinder with an inner diameter of about 200 mm, a stroke of about 150 mm, and an operating pressure of about 5 kg/ cm2 , but if necessary, an air cylinder with an inner diameter of 40 mm may be used.
The use of a hydraulic cylinder of this size allows the expansion and absorption mechanism 8 to be actuated more precisely using a well-known relief valve (not shown), as will be described below. 17a and 17b are arm-like members with a length of approximately 400 mm, and constitute a Y-shaped link mechanism 19 provided at the tip of the piston shaft 18, and each tip is attached to the inside of the formwork 5 and door portion 11. It is pivoted. 20
is a well-known electromagnetic vibrator with air cooling mechanism (frequency
3600v.pm (width 0.2 to 0.5mm), and usually four units are fixedly installed inside the formwork 5 at equal intervals. In addition, between the supporting members 14, if necessary, a hot air conduit 21 (indicated by a phantom line) having a slightly larger diameter and approximately the same length (height) as the door portion 12 is vertically welded. However, in order to increase thermal efficiency, it is preferable to provide the above-mentioned disk-shaped hot air guide plate 22 at its lower end.
次に、本考案の型枠の作用効果を実際に大型の
取鍋の内張りを流し込み施工する場合の使用例に
もとづいて、詳細に説明する。 Next, the effects of the formwork of the present invention will be explained in detail based on an example of its use when pouring the lining of a large ladle.
まず、第１図に示すように外径約４ｍ、高さ１
ｍの型枠５を小型のクレーン（図示せず）で吊つ
て、敷レンガ３の中心に載置したのち、その上
に、熱風導管２１の上下が密着しかつ全体がずれ
ないように、逆截頭直円錐状の型枠５を３基積み
重ねる。次に、各シリンダー１６の耐熱性のホー
ス２３を、第２図に示すように周知の電磁切換弁
２４を介して、エアー供給源あるいは、油圧ユニ
ツト２５にまた、断熱保護した電磁式振動機２０
の導線を電源にそれぞれ接続したのち、圧力計を
見ながら圧力調整バルブ（いずれも図示せず）を
回し、所定の圧力、たとえば５Kg／cm2のエアーを
エアシリンダーに供給する。すると、その内径が
約200mmであるので、各上下のピストン軸１８に
は、それぞれ約1.6トンの押圧力が発生し、それ
がさらにリンク機構１９の腕状部材１７ｂ（ピス
トン軸１８に対する取付角度約80゜）によつて、
約７倍に増大されたもの（２基の合計約22.4ト
ン）が、第２図に示すように、それまで内側に開
いていた扉部１２の背部に作用する（以下単に、
扉部１２の押圧力Fdという）ので、第３図に示
すように、きつちりとテーパー部９の中に嵌め込
まれ、型枠５と断熱レンガ４との間に環状の隙間
２７が形成される。なお、シリンダー１６の押圧
力は1.6トン未満では、後述するように、その隙
間２７の上端まで材料２６を充填した場合、その
ヘツド圧に起因して発生する押圧力Fh（以下、
単にヘツド圧Fhと略記する）によつて、扉部１
２が内側に開いてしまい、材料２６が洩れること
があるし、6.3トンをこえると、前記の軸支部分
が破損することがあるので、1.6トン乃至6.3トン
が最適である。 First, as shown in Figure 1, the outside diameter is about 4 m and the height is 1 m.
After suspending the formwork 5 with a small crane (not shown) and placing it on the center of the paving bricks 3, the formwork 5 is placed upside down so that the top and bottom of the hot air conduit 21 are in close contact with each other and the entire structure does not shift. Three truncated conical formworks 5 are stacked. Next, as shown in FIG. 2, the heat-resistant hose 23 of each cylinder 16 is connected to an air supply source or a hydraulic unit 25 via a well-known electromagnetic switching valve 24 to an electromagnetic vibrator 20 which is heat-insulated.
After connecting each lead wire to a power source, turn a pressure regulating valve (none of which is shown) while watching the pressure gauge to supply air at a predetermined pressure, for example, 5 kg/cm 2 to the air cylinder. Then, since the inner diameter is about 200 mm, a pressing force of about 1.6 tons is generated on each of the upper and lower piston shafts 18, which further increases the arm-like member 17b of the link mechanism 19 (the mounting angle with respect to the piston shaft 18). 80°)
As shown in Fig. 2, the amount increased by about 7 times (approximately 22.4 tons in total for the two units) acts on the back of the door section 12, which had previously opened inward (hereinafter simply,
As shown in FIG. 3, the door part 12 is tightly fitted into the tapered part 9, and an annular gap 27 is formed between the formwork 5 and the insulating brick 4. . Note that if the pressing force of the cylinder 16 is less than 1.6 tons, as will be described later, when the material 26 is filled up to the upper end of the gap 27, the pressing force Fh (hereinafter referred to as
(simply abbreviated as head pressure Fh), door part 1
2 may open inward and the material 26 may leak, and if it exceeds 6.3 tons, the aforementioned shaft support portion may be damaged, so 1.6 tons to 6.3 tons is optimal.
次に、電磁式振動機２０を作動させながら、第
１図に示すように、たとえば周知のジルコン質の
材料２６（添加水分約８重量％）を一定量づつ隙
間２７に投入しいつぱいに充填後、熱風ダクト２
８を連結し、矢印のように（第１図）300℃程度
の熱風を導入して加熱養生する。 Next, while operating the electromagnetic vibrator 20, as shown in FIG. , hot air duct 2
8 are connected and heated and cured by introducing hot air of about 300℃ as shown by the arrow (Figure 1).
次にこれらの過程において、拘束された型枠５
に発生する応力Feおよび材料２６のヘツド圧Fh
などの関係について説明する。 Next, in these processes, the restrained formwork 5
The stress Fe generated in and the head pressure Fh of the material 26
We will explain the relationships such as:
まず、常法によつて前記の材料２６を上方から
一定量づつ隙間２７に充填するにつれて、最下段
の型枠５にかかるヘツド圧Fhは、材料２６のヘ
ツド２９がその上端に達するまでは、第４図に示
すように、時間のほぼ２乗に比例して増加する
が、その後最上段の型枠５の上端に達するまでは
時間にほぼ比例して増加し、充填を終了した時点
で最高（21.0トン）となり、以降加熱養生を準備
する１時間はほぼ一定に保持される。なお、この
過程において膨張吸収機構８の一部を構成する扉
部１２の押圧力Fdは、前記のように、それより
若干大きめの22.4トンに設定されているので、そ
のヘツド圧Fhによつて扉部１２が内側へ開くこ
とはない。そして、加熱養生が始まるとともに材
料２６が徐々に硬化しはじめるので、ヘツド圧
Fhは点線で示すように前とは逆に減少し、完全
に硬化した時点で零になる。一方それと平行し
て、型枠５は全体が内側から300℃程度に加熱さ
れるので円周方向に膨張するが、材料２５が完全
に硬化する以前は内部の未硬化の部分でその膨張
が吸収されるから（すなわち、型枠５の外周面が
完全には拘束されていないから）型枠５の円周方
向にそれほど大きい応力Feは発生しない。しか
し、さらに時間が経過し内部まで硬化してしまう
と、型枠５の外側が固く拘束されてしまい、その
膨張を吸収できなくなるので、二点鎖線で示すよ
うに、型枠５の応力Feが急激に大きくなろうと
する。ところが、本考案の型枠５には、前述した
ような膨張吸収機構８が内蔵されているので、扉
部１２の傾斜面１３ａ，１３ｂに作用する型枠５
の応力Feが、前述のように設定した扉部１２の
押圧力Fdよりわずかでも大きくなると、それが
自動的に作動してピストン軸１８が縮小するの
で、一方の傾斜面１３ｂが型枠５のテーパー面１
０ｂに線接触した状態で扉部１２が若干内側へ開
く。それと同時に支持部材１４が若干弾性変形
し、さらにテーパー部９の巾が当初よりやや小さ
くなるので、大きくなろうとする応力Feが適宜
自動的に吸収され常に設定値以下に保持される。
よつて加熱養生しても型枠５が異状に変形したり
部分的に破損されないので、従来よりさらに多回
数くりかえし使用することができる。 First, as the material 26 is filled into the gap 27 in a fixed amount from above using the usual method, the head pressure Fh applied to the lowermost formwork 5 will be as follows until the head 29 of the material 26 reaches its upper end. As shown in Fig. 4, it increases approximately in proportion to the square of time, and then increases approximately in proportion to time until it reaches the top of the uppermost formwork 5, and reaches a maximum at the end of filling. (21.0 tons), which remains almost constant for the next 1 hour while preparing for heat curing. In addition, in this process, the pressing force Fd of the door part 12 that constitutes a part of the expansion absorption mechanism 8 is set to 22.4 tons, which is slightly larger than that, as described above, so the pressure is determined by the head pressure Fh. The door portion 12 does not open inward. Then, as the heating curing begins, the material 26 gradually begins to harden, so the head pressure increases.
As shown by the dotted line, Fh decreases in the opposite direction, reaching zero when it is completely cured. On the other hand, in parallel with this, the entire formwork 5 is heated from the inside to about 300°C, so it expands in the circumferential direction, but before the material 25 is completely hardened, the expansion is absorbed by the unhardened part inside. (that is, because the outer circumferential surface of the formwork 5 is not completely restrained), a very large stress Fe is not generated in the circumferential direction of the formwork 5. However, as time passes and the inside hardens, the outside of the formwork 5 becomes tightly constrained and cannot absorb the expansion, so the stress Fe in the formwork 5 increases as shown by the two-dot chain line. trying to grow rapidly. However, since the formwork 5 of the present invention incorporates the expansion absorption mechanism 8 as described above, the formwork 5 acting on the inclined surfaces 13a and 13b of the door portion 12
When the stress Fe becomes even slightly larger than the pressing force Fd of the door section 12 set as described above, it automatically operates and the piston shaft 18 contracts, so that one inclined surface 13b Tapered surface 1
The door portion 12 opens slightly inward while in line contact with 0b. At the same time, the support member 14 is slightly elastically deformed, and the width of the tapered portion 9 becomes slightly smaller than the original width, so that the increasing stress Fe is automatically absorbed as appropriate and always kept below the set value.
Therefore, the formwork 5 will not be abnormally deformed or partially damaged even after heating and curing, so it can be used more times than before.
また、材料２６が完全に硬化したのちは、電磁
切換弁２４を逆方向に作動させ、シリンダー１６
内部のエアーを矢印のように外部に放出してピス
トン軸１８をさらに縮小することによつて、第２
図に示すように、扉部１２をテーパー部９から完
全に内方へ突き出せば型枠５の直径がさらに小さ
くなり、硬化した材料２６との間に巾５〜10mmの
隙間が生じるので内張りを破損することなく上か
ら順に簡単に脱枠できる。 Further, after the material 26 is completely cured, the solenoid switching valve 24 is operated in the opposite direction, and the cylinder 16 is
By releasing the internal air to the outside as shown by the arrow and further reducing the piston shaft 18, the second
As shown in the figure, if the door part 12 is completely protruded inward from the tapered part 9, the diameter of the formwork 5 will become even smaller, and a gap of 5 to 10 mm in width will be created between it and the hardened material 26, so the inner lining will be removed. You can easily remove the frame from the top without damaging it.
なお、圧力源として市販の油圧ユニツト２５を
用いる場合には、仮想線で示すように、さらに、
それと前記の電磁切換弁２４を別の油圧ホースで
連結し、内蔵したレリーフ弁（図示せず）を、あ
らかじめ所望の値にセツトしておく。そうする
と、前記のように型枠５の応力Feが増加しよう
としてもそれが自動的に作動し、油圧シリンダー
内のオイルが油圧ユニツト２５に内蔵した油槽に
逆流するので扉部１２が内側へ若干開き、同様に
応力Feを吸収することができる。また、養生後
は電磁切換弁２４をそれまでと逆向きに作動さ
せ、シリンダー１６内のオイルを油槽へ回収すれ
ば、前記の場合と同様に簡単に脱枠できる。 In addition, when using a commercially available hydraulic unit 25 as a pressure source, as shown by a virtual line,
It is connected to the electromagnetic switching valve 24 by another hydraulic hose, and a built-in relief valve (not shown) is set to a desired value in advance. Then, even if the stress Fe in the formwork 5 is about to increase as described above, it will automatically operate and the oil in the hydraulic cylinder will flow back into the oil tank built into the hydraulic unit 25, causing the door 12 to open slightly inward. , can similarly absorb stress Fe. Further, after curing, the solenoid switching valve 24 is operated in the opposite direction and the oil in the cylinder 16 is collected into the oil tank, so that the frame can be easily removed in the same way as in the above case.
以上詳記したように、本考案の型枠は、軸方向
に設けた内広がりのテーパー部に、水平断面がほ
ぼ台形状の扉部を取り付けるとともに、支持部材
にほぼ水平に装着したシリンダーの先端のリンク
機構を連結し、内側へ開閉するようにしたもので
あつて、常法によつて、その内部に300℃程度の
熱風を供給すれば、冬期でも従来と変らない養生
時間で内張りを施工することができるうえに、加
熱養生中に型枠に発生する異常に高い膨張力をそ
の膨張吸収機構によつて自動的に減少するので、
型枠が変形せず長期間（多回数）使用できるとと
もに、硬化後内張りを破損しないで簡単に脱枠す
ることができる。 As described in detail above, the formwork of the present invention has a door section with a substantially trapezoidal horizontal cross section attached to the tapered section provided in the axial direction that widens inward, and the tip of the cylinder mounted almost horizontally on the support member. The link mechanism is connected to open and close inward, and by supplying hot air of about 300℃ to the inside using the usual method, the lining can be installed in the same curing time as before, even in winter. In addition, its expansion absorption mechanism automatically reduces the abnormally high expansion force generated in the formwork during heat curing.
The formwork can be used for a long period of time (many times) without being deformed, and the formwork can be easily removed after curing without damaging the lining.
なお、本考案の型枠は他にテーパーのついてい
ない取鍋あるいは円型のダクトなどにも適用でき
るものである。 The formwork of the present invention can also be applied to non-tapered ladles or circular ducts.
第１図乃至第４図は、いずれも、本考案の流し
込み施工用型枠に関し、第１図は、その一実施例
を示す縦断面図、第２図は第１図において扉部を
テーパー部に嵌め込む前の状態を示すＡ−Ａ水平
断面図、第３図は第１図において扉部をテーパー
部に嵌め込んだ状態を示す同じくＡ−Ａ水平断面
図であつて、膨張吸収機構の作動要領を示す。第
４図は、加熱養生時型枠に発生する応力などを示
すグラフである。
図中、５……型枠、８……膨張吸収機構、９…
…テーパー部、１２……扉部、１４……支持部
材、１６……シリンダー、１９……リンク機構で
ある。
1 to 4 all relate to the formwork for pouring construction of the present invention. FIG. 1 is a vertical sectional view showing one embodiment thereof, and FIG. FIG. 3 is a horizontal sectional view taken along line A-A showing the state in which the door part is fitted into the tapered part in FIG. Indicates the operating procedure. FIG. 4 is a graph showing stress generated in the formwork during heat curing. In the figure, 5...formwork, 8...expansion absorption mechanism, 9...
...Tapered portion, 12...Door portion, 14...Support member, 16...Cylinder, 19...Link mechanism.
Claims (1)
９に、水平断面がほぼ台形状の扉部１２を開閉可
能に取り付けるとともに、テーパー部９をまたい
で型枠５の内方に配設した支持部材１４にシリン
ダー１６を、取付部材１５を介してほぼ水平に軸
支し、ピストン軸１８の先端に設けたＹ字状のリ
ンク機構１９を構成する腕状部材１７ａ，１７ｂ
をそれぞれ型枠５と扉部１２に連結した膨張吸収
機構８を設けたことを特徴とする不定形耐火物流
し込み施工用型枠。 A door portion 12 having a substantially trapezoidal horizontal cross section is attached to the tapered portion 9 extending inwardly in the axial direction of the formwork 5 so as to be openable and closable, and is disposed inside the formwork 5 straddling the tapered portion 9. Arm-shaped members 17a and 17b constitute a Y-shaped link mechanism 19, which supports the cylinder 16 on the support member 14 via the mounting member 15 almost horizontally, and is provided at the tip of the piston shaft 18.
A formwork for monolithic refractory pouring construction, characterized in that an expansion absorption mechanism 8 is provided which is connected to a formwork 5 and a door part 12, respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4302982U JPS58147669U (en) | 1982-03-29 | 1982-03-29 | Formwork for monolithic refractory pouring construction |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4302982U JPS58147669U (en) | 1982-03-29 | 1982-03-29 | Formwork for monolithic refractory pouring construction |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS58147669U JPS58147669U (en) | 1983-10-04 |
| JPS6142675Y2 true JPS6142675Y2 (en) | 1986-12-03 |
Family
ID=30054126
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4302982U Granted JPS58147669U (en) | 1982-03-29 | 1982-03-29 | Formwork for monolithic refractory pouring construction |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS58147669U (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS51944A (en) * | 1974-06-21 | 1976-01-07 | Tsutomu Takamura | SENKO DENKYU |
-
1982
- 1982-03-29 JP JP4302982U patent/JPS58147669U/en active Granted
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS51944A (en) * | 1974-06-21 | 1976-01-07 | Tsutomu Takamura | SENKO DENKYU |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS58147669U (en) | 1983-10-04 |
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