JPH05164292A - Method of forming taper portion at connection of goods transport piping, abrasion detection method for taper portion forming member, and taper portion forming memter - Google Patents
Method of forming taper portion at connection of goods transport piping, abrasion detection method for taper portion forming member, and taper portion forming memterInfo
- Publication number
- JPH05164292A JPH05164292A JP3352693A JP35269391A JPH05164292A JP H05164292 A JPH05164292 A JP H05164292A JP 3352693 A JP3352693 A JP 3352693A JP 35269391 A JP35269391 A JP 35269391A JP H05164292 A JPH05164292 A JP H05164292A
- Authority
- JP
- Japan
- Prior art keywords
- annular plate
- article
- forming
- taper
- pipe
- 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.)
- Pending
Links
Landscapes
- Flanged Joints, Insulating Joints, And Other Joints (AREA)
- Protection Of Pipes Against Damage, Friction, And Corrosion (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、例えばごみ、穀物その
他の各種物品を空気等の流体によって輸送する物品輸送
用配管の接続部に於けるテーパー部形成方法及びテーパ
ー部形成用部材の摩耗検出方法及びテーパー部形成用部
材に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for forming a taper portion in a connecting portion of an article transporting pipe for transporting, for example, dust, grains and other various articles by a fluid such as air, and detection of wear of the taper portion forming member. The present invention relates to a method and a tapered portion forming member.
【０００２】[0002]
【従来の技術】物品輸送用配管に於いて、内径が異なる
配管の接続部や、同一径の配管のメカニカル継手部には
テーパーを形成している。図５は同一径の配管のメカニ
カル継手部に於けるテーパーの形成方法の従来の方法の
一例を示すもので、この従来例では、下流側の配管１０
１の継手部１０２の内壁を加工してテーパー１０３を形
成している。2. Description of the Related Art In a pipe for transporting goods, a taper is formed at a connecting portion of pipes having different inner diameters or a mechanical joint portion of pipes having the same diameter. FIG. 5 shows an example of a conventional method of forming a taper in a mechanical joint portion of a pipe having the same diameter. In this conventional example, the downstream pipe 10 is used.
The taper 103 is formed by processing the inner wall of the first joint 102.
【０００３】[0003]
【発明が解決しようとする課題】このように配管自体の
内壁を加工してテーパーを形成する方法では、現場で
の加工が困難である、硬化性に優れた材質の配管では
テーパー加工に時間が掛かり、コストが高い、テーパ
ー部の摩耗に対しては配管毎に交換しなければならな
い、という課題がある。本発明は、このような課題を解
決することを目的とするものである。In the method of forming the taper by processing the inner wall of the pipe itself as described above, it is difficult to perform the work on site, and it takes time to form the taper in the pipe made of a material having excellent curability. However, there is a problem that it is costly, costly, and the wear of the taper portion must be replaced for each pipe. The present invention aims to solve such problems.
【０００４】[0004]
【課題を解決するための手段】上述した課題を解決する
ために、まず本発明では、物品流通口を形成した環状板
体の一面側に、内周をテーパー面とすると共に先端を刃
状部した扁平筒体を突設してテーパー部形成用部材を構
成し、物品輸送用配管をフランジ部により接続する際、
上記環状板体をフランジ部間に介装すると共に上記扁平
筒体を上流側の配管に嵌合するテーパー部形成方法を提
案する。In order to solve the above-mentioned problems, first of all, in the present invention, the inner periphery is tapered and the tip is a blade-shaped portion on one surface side of an annular plate body having an article flow port formed therein. When forming a tapered portion forming member by projecting the flattened cylindrical body, when connecting the article transport pipe with the flange portion,
A method for forming a tapered portion is proposed, in which the annular plate body is interposed between the flange portions and the flat cylindrical body is fitted to the upstream pipe.
【０００５】また本発明では、上記構成に於いて、環状
板体に、一端を外周に開口すると共に他端を物品流通口
の近傍まで至らせた摩耗検出孔を形成し、物品輸送動作
に於ける摩耗により物品流通口が拡径して摩耗検出孔の
他端が露出したことを、該摩耗検出孔の一端側に於ける
圧力の変化によりとらえて摩耗を検出する上記テーパー
部形成用部材の摩耗検出方法を提案する。Further, in the present invention, in the above-mentioned structure, the annular plate member is formed with a wear detecting hole having one end opened to the outer periphery and the other end reaching the vicinity of the article distribution port, and the article is transported. Of the tapered portion forming member for detecting wear by grasping that the other end of the wear detection hole is exposed due to the expansion of the article circulation port due to wear due to the change in pressure at the one end side of the wear detection hole. A wear detection method is proposed.
【０００６】そして本発明では、上記テーパー部形成用
部材として、上述したように物品流通口を形成した環状
板体の一面側に、内周をテーパー面とすると共に先端を
刃状部した扁平筒体を突設した構成に於いて、環状板体
と扁平筒体とは別体に構成し、上記環状板体の物品流通
口の周縁に、上記扁平筒体の装着凹部を構成することを
提案する。Further, in the present invention, as the tapered portion forming member, a flat cylinder having a tapered surface on the inner periphery and a blade-shaped tip on one surface side of the annular plate body having the article distribution port formed as described above. In the configuration in which the body is provided in a projecting manner, it is proposed that the annular plate body and the flat cylindrical body are formed separately, and the mounting concave portion of the flat cylindrical body is formed at the peripheral edge of the article circulation port of the annular plate body. To do.
【０００７】また本発明では、上述のテーパー部形成用
部材に於いて、環状板体に、一端を外周に開口すると共
に他端を物品流通口の近傍まで至らせた摩耗検出孔を形
成することを提案する。Further, according to the present invention, in the above-mentioned tapered portion forming member, the annular plate member is formed with a wear detecting hole having one end opened to the outer periphery and the other end reaching the vicinity of the article flow port. To propose.
【０００８】[0008]
【作用】上述した本発明に於いては、物品輸送用配管を
フランジ部により接続する際、テーパー部形成用部材の
環状板体をフランジ部間に介装すると共に扁平筒体を上
流側の配管に嵌合することにより、容易に接続部に於け
るテーパーを形成することができ、またテーパー部形成
用部材が摩耗した場合には、これを容易に交換すること
ができる。In the present invention described above, when connecting the pipes for transporting articles by the flange portion, the annular plate body of the member for forming the taper portion is interposed between the flange portions, and the flat cylindrical body is provided on the upstream side pipe. The taper at the connecting portion can be easily formed by fitting the connector to the connector, and when the tapered portion forming member is worn, it can be easily replaced.
【０００９】摩耗検出孔を設けたテーパー部形成用部材
に於いては、その摩耗が進行すると摩耗検出孔の他端が
露出して配管内の圧力が、摩耗検出孔を通して環状板体
の外側に伝わるので、その圧力の変化をとらえることに
より、所定の摩耗を検出することができ、即ち交換時期
を検出することができる。In the taper portion forming member having the wear detecting hole, when the wear progresses, the other end of the wear detecting hole is exposed and the pressure in the pipe is transferred to the outside of the annular plate through the wear detecting hole. By transmitting the change in pressure, it is possible to detect a predetermined wear, that is, it is possible to detect the replacement time.
【００１０】環状板体と扁平筒体とを別体に構成したテ
ーパー部形成用部材に於いては、製作と共に装着及び交
換作業が容易である。The taper portion forming member in which the annular plate member and the flat cylindrical member are separately formed is easy to manufacture and attach and replace.
【００１１】[0011]
【実施例】次に本発明の実施例を図について説明する。
図１〜図３は本発明の一実施例を表したもので、図１は
物品輸送用配管の接続部近傍を表したもの、また図２、
図３はテーパー部形成用部材を構成する夫々環状板体、
扁平筒体を表したものである。まず図１に於いて符号
１、２は、ごみ、穀物その他の各種物品を空気等の流体
によって輸送する物品輸送用配管の接続部近傍を示すも
ので、図中右側の配管２が輸送に於ける物品の流れの上
流側であり、この上流側の配管２の内径は、下流側の配
管１の内径よりも僅かに大きく構成している。そしてこ
れらの配管１、２の接続側端部には接続用のフランジ部
３、４を設けており、このフランジ部３、４をボルト
５、ナット６で締め付けて接続を行う構成としている。
また図１、図３に於いて、符号７は中央に物品流通口８
を設けて環状に構成した環状板体であり、この環状板体
７は上記接続に於いてフランジ部３、４に介装される。
物品流通口８の径は、下流側の配管１の内径よりも僅か
に小さく形成している。また環状板体７には上記物品流
通口８の周縁に、扁平筒体９を装着する装着凹部１０を
構成している。この扁平筒体９は、図１〜図３に示すよ
うに、内周をテーパー面１１とすると共に先端を刃状部
１２に構成している。そしてこの扁平筒体９の外径は、
上記上流側の配管１との嵌め合いに於いて、隙間が生じ
ない寸法とし、また基端側の内径は環状板体７の物品流
通口８の径と等しく構成している。こうしてこの実施例
では、夫々別体に構成した環状板体７と扁平筒体９とに
よりテーパー部形成用部材１３を構成している。Embodiments of the present invention will now be described with reference to the drawings.
1 to 3 show an embodiment of the present invention, FIG. 1 shows the vicinity of a connection portion of a goods transport pipe, and FIG.
FIG. 3 shows respective annular plate members constituting the tapered portion forming member,
It shows a flat tubular body. First, in FIG. 1, reference numerals 1 and 2 show the vicinity of a connecting portion of an article transport pipe for transporting dust, grains and various other articles by a fluid such as air, and the pipe 2 on the right side in the figure is for transportation. On the upstream side of the flow of articles, the inner diameter of the upstream pipe 2 is slightly larger than the inner diameter of the downstream pipe 1. Then, flanges 3 and 4 for connection are provided at the end portions of the pipes 1 and 2 on the connection side, and the flanges 3 and 4 are tightened with bolts 5 and nuts 6 for connection.
Further, in FIGS. 1 and 3, reference numeral 7 is the article distribution port 8 in the center.
Is an annular plate body having an annular shape, and the annular plate body 7 is interposed in the flange portions 3 and 4 in the above connection.
The diameter of the article distribution port 8 is formed to be slightly smaller than the inner diameter of the downstream pipe 1. Further, the annular plate body 7 is provided with a mounting recess 10 for mounting the flat cylindrical body 9 on the periphery of the article circulation port 8. As shown in FIGS. 1 to 3, the flat tubular body 9 has a tapered surface 11 on the inner circumference and a blade portion 12 at the tip. The outer diameter of the flat tubular body 9 is
In fitting with the pipe 1 on the upstream side, no clearance is generated, and the inner diameter on the base end side is equal to the diameter of the article distribution port 8 of the annular plate body 7. Thus, in this embodiment, the tapered plate forming member 13 is constituted by the annular plate body 7 and the flat cylindrical body 9 which are separately configured.
【００１２】以上の構成に於いて配管１、２を接続する
際には、まず扁平筒体９を、その先端の刃状部１２を前
方に向けて上流側の配管１内に差し込む。次いで環状板
体７の装着凹部１０を扁平筒体９の基端側に装着し、こ
の状態に於いて環状板体７をフランジ部３、４で挾んで
ボルト５、ナット６により締め付けることにより、配管
１、２を接続することができる。When connecting the pipes 1 and 2 in the above-described structure, first, the flat tubular body 9 is inserted into the upstream pipe 1 with the blade portion 12 at the tip thereof facing forward. Then, the mounting recess 10 of the annular plate body 7 is mounted on the base end side of the flat cylindrical body 9, and in this state, the annular plate body 7 is sandwiched by the flange portions 3 and 4 and tightened by the bolts 5 and the nuts 6. The pipes 1 and 2 can be connected.
【００１３】以上の接続状態に於いて、空気等の流体に
より上流側の配管２を流れてきた物品は、扁平筒体９の
テーパー面１１によって形成されるテーパー部を通り、
環状板体７の物品流通口８を経て下流側の配管１内に流
入して輸送されて行き、従って上記テーパー部により、
配管１、２の接続部に於いても円滑な物品の輸送が行わ
れる。In the above connected state, the article flowing through the upstream pipe 2 by a fluid such as air passes through the tapered portion formed by the tapered surface 11 of the flat tubular body 9,
After passing through the article distribution port 8 of the annular plate body 7 and flowing into the downstream side pipe 1, it is transported, and therefore, due to the taper portion,
The goods can be smoothly transported even at the connecting portions of the pipes 1 and 2.
【００１４】上述した輸送動作に於いて、テーパー部及
び物品流通口８は物品との接触により次第に摩耗して行
くので、所定の運転時間経過後には取換えなければなら
ないのであるが、このテーパー部は、環状板体７と扁平
筒体９とにより構成しているので、これらだけを取換え
れば良く、その作業が非常に容易であると共にコストも
低い。In the above-described transportation operation, the taper portion and the article distribution port 8 gradually wear due to contact with the article, so that the taper portion must be replaced after a predetermined operating time has passed. Since it is composed of the annular plate body 7 and the flat cylindrical body 9, only these need to be replaced, the work is very easy and the cost is low.
【００１５】以上の実施例では、夫々別体の環状板体７
と扁平筒体９とによりテーパー部形成用部材１３を構成
して、これを配管１、２の接続時に装着により一体化す
る構成としているが、場合によってはこれらを予め一体
に構成することもできる。In the above-mentioned embodiments, the annular plate members 7 are separate bodies.
The taper portion forming member 13 is configured by the flat tube body 9 and the flat tubular body 9 and is integrated by mounting when the pipes 1 and 2 are connected. However, in some cases, they may be integrally configured in advance. ..
【００１６】次に図４は本発明の他の実施例を示すもの
で、この実施例は上記テーパー部の所定の摩耗を接続部
の外側に於いて検出可能とした発明に対応するものであ
る。この図４は図１と同様に物品輸送用配管の接続部近
傍を示すもので、図１と同様な構成要素には同一の符号
を付している。Next, FIG. 4 shows another embodiment of the present invention. This embodiment corresponds to the invention in which the predetermined wear of the tapered portion can be detected outside the connecting portion. .. This FIG. 4 shows the vicinity of the connecting portion of the article transportation pipe as in FIG. 1, and the same components as those in FIG. 1 are designated by the same reference numerals.
【００１７】即ち、図４に於いて符号７は環状板体であ
り、この環状板体７に、一端を外周に開口すると共に他
端を上記物品流通口８の近傍まで至らせた摩耗検出孔１
４を形成している。That is, in FIG. 4, reference numeral 7 is an annular plate body, and the annular plate body 7 has a wear detecting hole having one end opened to the outer periphery and the other end reaching the vicinity of the article distribution port 8. 1
4 is forming.
【００１８】以上の構成に於いては物品輸送動作に於け
る上述した摩耗によりテーパー部と共に物品流通口８が
拡径して行き、摩耗検出孔１４の他端が露出すると、配
管１、２内の圧力が、この摩耗検出孔１４を通して環状
板体７の外側に伝わる。即ち、上記物品の輸送を、輸送
用配管の下流側に構成した空気吸引ポンプにより形成さ
れる吸引空気の流れによって行う場合には、摩耗検出孔
１４の一端側の圧力が低下することにより、上記他端の
露出、即ち所定の摩耗の発生を検出することができる。
このような摩耗検出孔１４の一端側の圧力の低下は、圧
力スイッチ等適宜の圧力応動手段を用いて検出すること
ができる。In the above construction, the diameter of the article distribution port 8 increases along with the taper portion due to the above-described wear in the article transport operation, and when the other end of the wear detection hole 14 is exposed, the inside of the pipes 1 and 2 is exposed. Is transmitted to the outside of the annular plate body 7 through the wear detecting hole 14. That is, when the article is transported by the flow of suction air formed by the air suction pump configured on the downstream side of the transportation pipe, the pressure on one end side of the wear detection hole 14 decreases, The exposure of the other end, that is, the occurrence of predetermined wear can be detected.
Such a decrease in pressure on the one end side of the wear detecting hole 14 can be detected by using an appropriate pressure responsive means such as a pressure switch.
【００１９】このようにして摩耗検出孔１４により検出
する摩耗の程度は、それ以上の摩耗の進行により下流側
の配管１が摩耗するのを防止し得る程度とすれば良く、
これは環状板体７の物品流通口８の径が、例えば下流側
の配管１の径程度となった時に摩耗検出孔１４の他端が
露出するように設定することにより達成することができ
る。In this way, the degree of wear detected by the wear detection hole 14 may be such that it can prevent the downstream side pipe 1 from being worn due to further progress of wear.
This can be achieved by setting the other end of the wear detection hole 14 to be exposed when the diameter of the article distribution port 8 of the annular plate body 7 becomes, for example, about the diameter of the downstream pipe 1.
【００２０】[0020]
【発明の効果】本発明は以上の通り、配管自体にテーパ
ー加工を施す必要がなく、テーパー部形成用部材を配管
の接続部に介装することによりテーパー部を得ることが
できるので、次のような効果がある。 現場での作業が非常に容易である。 硬化性に優れた材質の配管に対するテーパー加工が必
要でないので、加工手間が省け、低コストである。 テーパー部の摩耗に対しては、テーパー部形成用部材
だけを取換えれば良いので、交換作業が容易で、コスト
も低い。 テーパー部形成用部材を構成する環状板体に摩耗検出
孔を設けることにより、テーパー部の摩耗を外部に於い
て検出することができ、保守が容易である。As described above, according to the present invention, since it is not necessary to taper the pipe itself, the tapered portion can be obtained by interposing the member for forming the tapered portion at the connecting portion of the pipe. There is such an effect. Work on site is very easy. Since it is not necessary to taper the pipe made of a material having excellent curability, it is possible to save the labor and cost. As for the wear of the tapered portion, only the member for forming the tapered portion needs to be replaced, so that the replacement work is easy and the cost is low. By providing the wear detecting hole in the annular plate that constitutes the tapered portion forming member, wear of the tapered portion can be detected outside, and maintenance is easy.
【図１】本発明の一実施例を表したもので、物品輸送用
配管の接続部近傍の縦断面図である。FIG. 1 shows an embodiment of the present invention, and is a vertical cross-sectional view of the vicinity of a connecting portion of an article transport pipe.
【図２】図１に表したテーパー部形成用部材を構成する
扁平筒体を表した縦断面図である。FIG. 2 is a vertical cross-sectional view showing a flat cylindrical body forming the tapered portion forming member shown in FIG.
【図３】図１に表したテーパー部形成用部材を構成する
環状板体を仮想線の扁平筒体と共に表した縦断面図であ
る。FIG. 3 is a vertical cross-sectional view showing an annular plate body that constitutes the tapered portion forming member shown in FIG. 1 together with a flat cylindrical body of an imaginary line.
【図４】本発明の他の実施例を表したもので、物品輸送
用配管の接続部近傍の要部縦断面図である。FIG. 4 shows another embodiment of the present invention, and is a vertical cross-sectional view of a main part in the vicinity of the connection part of the article transport pipe.
【図５】物品輸送用配管の接続部に於ける従来のテーパ
ー部の構成を表した縦断面図である。FIG. 5 is a vertical cross-sectional view showing a configuration of a conventional taper portion in a connection portion of an article transport pipe.
１ 下流側の配管 ２ 上流側の配管 ３ フランジ部 ４ フランジ部 ５ ボルト ６ ナット ７ 環状板体 ８ 物品流通口 ９ 扁平筒体 １０ 装着凹部 １１ テーパー面 １２ 刃状部 １３ テーパー部形成用部材 １４ 摩耗検出孔 1 Downstream piping 2 Upstream piping 3 Flange portion 4 Flange portion 5 Bolt 6 Nut 7 Annular plate body 8 Article distribution port 9 Flat cylinder body 10 Mounting recess 11 Tapered surface 12 Blade portion 13 Tapered portion forming member 14 Wear Detection hole
Claims (5)
に、内周をテーパー面とすると共に先端を刃状部した扁
平筒体を突設してテーパー部形成用部材を構成し、物品
輸送用配管をフランジ部により接続する際、上記環状板
体をフランジ部間に介装すると共に上記扁平筒体を上流
側の配管に嵌合することを特徴とする物品輸送用配管の
接続部に於けるテーパー部形成方法1. A tapered portion forming member is formed by projecting a flat cylindrical body having a tapered surface on the inner periphery and a blade-shaped tip at one surface side of an annular plate body having an article flow port, When connecting the article transport pipe by the flange portion, the annular plate body is interposed between the flange portions and the flat tubular body is fitted to the upstream pipe, and the article transport pipe connecting portion is characterized in that Forming method for taper
口すると共に他端を物品流通口の近傍まで至らせた摩耗
検出孔を形成し、物品輸送動作に於ける摩耗により物品
流通口が拡径して摩耗検出孔の他端が露出したことを、
該摩耗検出孔の一端側に於ける圧力の変化によりとらえ
て摩耗を検出することを特徴とする物品輸送用配管の接
続部に於けるテーパー部形成用部材の摩耗検出方法2. An annular plate member according to claim 1, wherein a wear detecting hole is formed such that one end is opened to the outer periphery and the other end is brought close to the article distribution port, and the article is distributed by abrasion in the article transporting operation. If the diameter of the mouth is expanded and the other end of the wear detection hole is exposed,
A wear detecting method for a member for forming a taper portion in a connecting portion of an article transport pipe, characterized by detecting wear by detecting a change in pressure at one end side of the wear detecting hole.
に、内周をテーパー面とすると共に先端を刃状部した扁
平筒体を突設したことを特徴とする物品輸送用配管の接
続部に於けるテーパー部形成用部材3. A pipe for transporting articles, characterized in that a flat cylindrical body having a tapered inner surface and a blade-like tip is provided on one surface side of an annular plate body having an article flow port formed therein. Member for forming taper part at connection part
て、環状板体と扁平筒体とは別体に構成し、上記環状板
体の物品流通口の周縁に、上記扁平筒体の装着凹部を構
成したことを特徴とする物品輸送用配管の接続部に於け
るテーパー部形成用部材4. The tapered portion forming member according to claim 3, wherein the annular plate body and the flat cylindrical body are formed separately, and the flat cylindrical body is formed on the periphery of the article distribution port of the annular plate body. A member for forming a taper portion at a connection portion of a pipe for transporting articles, characterized by comprising a mounting recess
材に於いて、環状板体に、一端を外周に開口すると共に
他端を物品流通口の近傍まで至らせた摩耗検出孔を形成
したことを特徴とする物品輸送用配管の接続部に於ける
テーパー部形成用部材5. The tapered portion forming member according to claim 3 or 4, wherein the annular plate member is formed with a wear detecting hole having one end opened to the outer periphery and the other end reaching the vicinity of the article distribution port. A member for forming a taper portion in a connection portion of a pipe for transporting goods, characterized in that
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3352693A JPH05164292A (en) | 1991-12-16 | 1991-12-16 | Method of forming taper portion at connection of goods transport piping, abrasion detection method for taper portion forming member, and taper portion forming memter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3352693A JPH05164292A (en) | 1991-12-16 | 1991-12-16 | Method of forming taper portion at connection of goods transport piping, abrasion detection method for taper portion forming member, and taper portion forming memter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH05164292A true JPH05164292A (en) | 1993-06-29 |
Family
ID=18425791
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3352693A Pending JPH05164292A (en) | 1991-12-16 | 1991-12-16 | Method of forming taper portion at connection of goods transport piping, abrasion detection method for taper portion forming member, and taper portion forming memter |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH05164292A (en) |
-
1991
- 1991-12-16 JP JP3352693A patent/JPH05164292A/en active Pending
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US4606556A (en) | Wear resistant elbow | |
| US4199010A (en) | Ceramic lined conduit | |
| US6260854B1 (en) | Flat gasket ring | |
| US5749607A (en) | Joint assembly employing multi-ring gasket | |
| US8960572B2 (en) | Air manifold having nozzles | |
| US4411388A (en) | Apparatus for conveying lightweight particulate matter | |
| US6979025B2 (en) | Joining of lined pipes | |
| US20110049878A1 (en) | Profiled Gasket For Lined Piping | |
| JP2669857B2 (en) | Pneumatic supply device for bulk goods | |
| CN109911629B (en) | Novel prevent that powder from attaching wall strength powder conveying sleeve pipe | |
| US3833267A (en) | Liner and process for combating wear in pneumatic transport systems | |
| US4447076A (en) | Conduit assembly | |
| US2946628A (en) | Sand booster | |
| JPH05164292A (en) | Method of forming taper portion at connection of goods transport piping, abrasion detection method for taper portion forming member, and taper portion forming memter | |
| JPH0674094B2 (en) | A device that conveys bulk cargo in a new-mat type | |
| EP0829670B1 (en) | Hose coupler | |
| US7874192B2 (en) | Arrangement for cooling a roll | |
| US5078435A (en) | Self-aligned flanged coupling | |
| CN206072573U (en) | The inner tube structure of defeated grey double-jacket tube | |
| US2460311A (en) | Two-piece welding pipe flange | |
| JPH06229487A (en) | Pipe joint | |
| KR101121799B1 (en) | powder transfer apparatus | |
| JPH09126365A (en) | Small diameter pipe connection device | |
| JPH056285U (en) | Wear resistant pipe fittings | |
| JP2000046268A (en) | Adhesion preventing apparatus for piping connecting part |