JPH0648241B2 - Underground environment test equipment - Google Patents
Underground environment test equipmentInfo
- Publication number
- JPH0648241B2 JPH0648241B2 JP10918289A JP10918289A JPH0648241B2 JP H0648241 B2 JPH0648241 B2 JP H0648241B2 JP 10918289 A JP10918289 A JP 10918289A JP 10918289 A JP10918289 A JP 10918289A JP H0648241 B2 JPH0648241 B2 JP H0648241B2
- Authority
- JP
- Japan
- Prior art keywords
- environment
- water
- buried
- soil
- steel 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.)
- Expired - Lifetime
Links
Landscapes
- Testing Of Devices, Machine Parts, Or Other Structures Thereof (AREA)
- Testing Resistance To Weather, Investigating Materials By Mechanical Methods (AREA)
Description
【発明の詳細な説明】 ［産業上の利用分野］ 本発明は埋設環境下での被覆鋼管の耐久寿命を推定する
等、土中環境試験を行う装置に関するものである。DETAILED DESCRIPTION OF THE INVENTION [Industrial field of use] The present invention relates to an apparatus for performing an underground environment test, such as estimating a durable life of a coated steel pipe under a buried environment.
［従来の技術］ 近年、パイプラインに於ける重質油の高温輸送あるいは
スチームや湯を通す地域冷暖房用途の配管等で、被覆鋼
管の使用環境が高温化の一途をたどっている。これらの
被覆鋼管は基本的に地下埋設管として使用されること、
かつ高温では被覆材料の劣化速度及び鋼管の腐食速度が
著しく速くなることから、地中に埋設した状態であらか
じめその耐久寿命を推定することが極めて重要となる。
このような埋設環境下での被覆鋼管の耐久寿命を求める
方法としては、従来から第２図に示すように試験体とな
る被覆鋼管12を既存の屋外埋設の給湯管15等の一部を使
用してつなぐというものがあるが、工事が大掛りなため
一度埋めてしまうとその後の状況を頻繁に観察すること
が困難であるのみならず、埋設環境が埋めた場所に限定
されてしまうため得られる耐久寿命が汎用性に乏しく、
また、つないだ給湯管15の実使用温度で運転するため被
覆材料の劣化及び鋼管の腐食を促進するのには至らず、
耐久寿命を求めるのに莫大な時間を要するという欠点が
ある。[Prior Art] In recent years, the environment in which coated steel pipes are used has been steadily increasing in temperature, such as pipes for transportation of heavy oil in pipelines at high temperatures or for district heating and cooling applications through which steam or hot water is passed. These coated steel pipes are basically used as underground pipes,
In addition, since the deterioration rate of the coating material and the corrosion rate of the steel pipe become extremely high at high temperatures, it is extremely important to estimate the durable life of the steel in advance when it is buried in the ground.
As a method of obtaining the durable life of a coated steel pipe in such a buried environment, conventionally, as shown in FIG. 2, a covered steel pipe 12 to be a test body is used by using a part of an existing outdoor hot water supply pipe 15 or the like. However, once buried, it is difficult to observe the situation frequently after the construction is completed, and the buried environment is limited to the location where it was buried. It has a poor durability life and is not versatile,
Further, since the connected hot water supply pipe 15 is operated at the actual operating temperature, it does not lead to the deterioration of the coating material and the corrosion of the steel pipe,
It has a drawback that it takes a huge amount of time to obtain a durable life.
［発明が解決しようとする課題］ 本発明は、このような埋設環境下での被覆鋼管の耐久寿
命を推定するにあたって、小型の装置によって様々な埋
設環境下での耐久寿命を短時間で推定しようとするもの
であり、また他の材料等の土中環境の試験にも使用でき
るものを提供することを目的とする。[Problems to be Solved by the Invention] In estimating the durable life of a coated steel pipe in such a buried environment, the present invention will estimate the durable life in various buried environments in a short time with a small device. In addition, the purpose is to provide a material that can also be used for testing the soil environment of other materials.
［課題を解決するための手段］ 本発明は上記のような目的を使用する装置であって、す
なわち、埋設環境となる土壌２が充填できる上部開放の
試験槽１の上部に水を供給するシャワー３、側面に余剰
水を排出するオーバーフロー・トレイ４及び観測用窓
５、下部に止水弁６付き排水口７を備え、試験の目的に
よってはさらに試験槽１の内部にヒーター11を設けたこ
とを特徴とする土中環境試験装置である。[Means for Solving the Problems] The present invention is a device that uses the above-mentioned object, that is, a shower that supplies water to the upper portion of an upper open test tank 1 that can be filled with soil 2 that is a buried environment. 3, an overflow tray 4 for discharging excess water on the side surface, an observation window 5, a drain port 7 with a water shutoff valve 6 at the bottom, and a heater 11 inside the test tank 1 depending on the purpose of the test. It is an underground environment testing device characterized by.
［作用・実施例］ 次に本発明装置の構成について図面を用いて説明する。[Operation / Example] Next, the configuration of the device of the present invention will be described with reference to the drawings.
１は本発明になる土中環境試験装置の試験槽で、埋設環
境となる土壌２が充填できるよう上部開放となってい
る。この試験槽１は上部に水を供給するシャワー３、側
面に余剰水を排出するオーバーフロー・トレイ４及び土
壌状態観測用窓５、下部に止水弁６付き排水口７を備え
ている。オーバーフロー・トレイ４が取り付けられてい
る試験槽１の側面には数ケ所の開口部８が設けられてお
り、その内部のいずれか一つにオーバーフロー・トレイ
４を取り付け、残りの開口部は盲蓋９でふさぐことによ
り、その高さを任意に変えることができる。10は土留の
ための金網である。Reference numeral 1 is a test tank of the soil environment test apparatus according to the present invention, which is open at the top so that the soil 2 to be the buried environment can be filled. This test tank 1 is equipped with a shower 3 for supplying water to the upper part, an overflow tray 4 for discharging excess water on the side surface, a soil condition observation window 5, and a drain port 7 with a water shutoff valve 6 at the lower part. On the side surface of the test tank 1 to which the overflow tray 4 is attached, several openings 8 are provided, and the overflow tray 4 is attached to any one of the inside, and the remaining openings are covered with a blind lid. By closing with 9, the height can be changed arbitrarily. 10 is a wire mesh for retaining soil.
試験の目的によってはさらにヒーター11を設けることが
必要であるが、その例は以下のごとくである。試験体と
なる被覆鋼管12内に高温流体が流れるような場合を再現
するために、その内部にヒーター11を装填する。残りの
空間にはヒーター11からの熱を均一に伝えるために熱伝
導物質を充填し、温度は鋼管内面に埋め込まれた温度検
出部13によって検出・制御する。また、被覆鋼管12の両
開放面はヒーター11からの熱が逃げないよう断熱物質14
によって蓋をし、その接触面は外部からの水の侵入を防
ぐためにパッキン及びシール剤等で完全にシールする。Depending on the purpose of the test, it is necessary to further provide the heater 11, but an example thereof is as follows. In order to reproduce the case where a high-temperature fluid flows in the coated steel pipe 12 as a test body, the heater 11 is loaded inside thereof. The remaining space is filled with a heat conductive material in order to uniformly transfer the heat from the heater 11, and the temperature is detected and controlled by the temperature detection unit 13 embedded in the inner surface of the steel pipe. In addition, both open surfaces of the coated steel pipe 12 have a heat insulating material 14 to prevent heat from the heater 11 from escaping.
Then, the contact surface is completely sealed with packing and a sealant to prevent water from entering from the outside.
本発明装置の操作について説明する。The operation of the device of the present invention will be described.
まず試験槽１に埋設環境となる土壌２を充填し、その中
に試験体となる被覆鋼管12を埋め込む。埋設環境につい
ては実際に被覆鋼管12を埋める場所が地下水面以上と地
下水面以下の２つに大きく分けられるので、本発明装置
では両者を再現できるようになっている。すなわち、地
下水面以上では土壌空隙中への水の供給は降雨によって
もたらされるので、それを規定したシャワー３にて水を
供給し、余剰となった水は止水弁６を開けた状態で排水
口７より排出させ、その環境を再現する。First, the test tank 1 is filled with the soil 2 as the burying environment, and the coated steel pipe 12 as the test body is embedded therein. Regarding the burial environment, the place where the coated steel pipe 12 is actually buried can be roughly divided into two areas, that is, above the water table and below the water table. Therefore, the device of the present invention can reproduce both. That is, above the water table, water is supplied to the soil voids by rainfall, so water is supplied by the shower 3 that regulates it, and excess water is drained with the stop valve 6 open. Eject from mouth 7 and reproduce the environment.
土壌空隙中の空気及び水の構成比は、１回の散水流量、
散水時間及び散水の間隔によって任意に設定することが
でき、例えば日本の平均的な降雨による埋設環境を再現
するためには、日本の年平均降水量を日割りした水量を
シャワー３で毎日散水すれば良いし、砂漠の埋設環境を
再現すためには、降雨による水の供給がないのでシャワ
ー３による散水を中止すればよい。The composition ratio of air and water in the soil void is one sprinkling flow rate,
It can be set arbitrarily depending on the sprinkling time and the interval of sprinkling. For example, in order to reproduce the buried environment due to the average rainfall in Japan, if the daily water amount obtained by dividing the annual average rainfall in Japan is watered in the shower 3 every day. Good, in order to reproduce the buried environment in the desert, it is sufficient to stop the watering by the shower 3 because there is no water supply due to rainfall.
また、地下水面以下では土壌空隙は総て水で満たされて
いるので、空隙中の水が蒸発しないようシャワー３の１
回の散水流量、散水時間及び散水の間隔を設定し、余剰
となった水は止水弁６を閉じた状態でオーバーフロー・
トレイ４から排出させ、その環境を再現する。In addition, since all the soil voids are filled with water below the water table, the water in the voids will not evaporate, so
Set the sprinkling flow rate, sprinkling time and sprinkling interval, and the excess water will overflow when the water shutoff valve 6 is closed.
It is ejected from the tray 4 and its environment is reproduced.
地下水面の位置はオーバーフロー・トレイ４の試験槽１
への取り付け高さによって任意に設定でき、例えば地下
水面の位置が被覆鋼管12に対して変動するような埋設環
境を再現するためには、その状況に従って逐次オーバー
フロー・トレイ４の取り付け高さを変えれば良い。この
際地下水面の位置は観測用窓５より観察できる。The position of the water table is the test tank 1 of the overflow tray 4.
The height of the overflow tray 4 can be set arbitrarily according to the situation, in order to reproduce the buried environment in which the position of the water table changes with respect to the coated steel pipe 12. Good. At this time, the position of the water table can be observed through the observation window 5.
被覆鋼管12の耐久寿命を短時間で推定するには、同一の
埋設環境を保持した試験槽１を少なくとも３台以上用
い、各々に埋め込んだ被覆鋼管12の温度を、それの実使
用温度以上被覆材料がその形状を保てなくなる温度（例
えば有機高分子材料であれば融点）以下の範囲内で各々
設定し耐久寿命を求めれば良い。In order to estimate the durable life of the coated steel pipe 12 in a short time, at least three or more test tanks 1 having the same buried environment are used, and the temperature of the coated steel pipe 12 embedded in each of them is equal to or higher than the actual operating temperature. The durability life may be determined by setting each within a range of a temperature below which the material cannot maintain its shape (for example, a melting point in the case of an organic polymer material).
［発明の効果］ 以上説明したように本発明装置を使用することにより、
装置が小型で埋設環境下での被覆鋼管等土中埋設物の劣
化及び腐食状況を頻繁に観察するのが容易であること、
様々な埋設環境が再現できること、短時間で耐久寿命が
推定できることなどの効果を奏する。[Effects of the Invention] By using the device of the present invention as described above,
The equipment is small, and it is easy to frequently observe the deterioration and corrosion conditions of buried objects such as coated steel pipes in the buried environment,
It is possible to reproduce various buried environments and to estimate the durable life in a short time.
第１図は本発明土中環境試験装置の断面説明図、第２図
は従来の埋設環境下での被覆鋼管の耐久寿命を求める方
法の説明図である。 １……試験槽、２……土壌、３……シャワー、４……オ
ーバーフロー・トレイ、５……観測用窓、６……止水
弁、７……排水口、８……開口部、９……盲蓋、10……
金網、11……ヒーター、12……被覆鋼管、13……温度検
出部、14……断熱物質、15……給湯管FIG. 1 is a cross-sectional explanatory view of the soil environment testing apparatus of the present invention, and FIG. 2 is an explanatory view of a conventional method for obtaining the durable life of a coated steel pipe under a buried environment. 1 ... Test tank, 2 ... Soil, 3 ... Shower, 4 ... Overflow tray, 5 ... Observation window, 6 ... Water stop valve, 7 ... Drainage port, 8 ... Opening, 9 ...... Blind lid, 10 ……
Wire mesh, 11 ... Heater, 12 ... Coated steel pipe, 13 ... Temperature detection part, 14 ... Insulation material, 15 ... Hot water pipe
Claims (2)
開放の試験槽(1) の上部に水を供給するシャワー(3) 、
側面に余剰水を排出するオーバーフロー・トレイ(4) 及
び観測用窓(5) 、下部に止水弁(6) 付き排水口(7) を備
えたことを特徴とする土中環境試験装置。1. A shower (3) for supplying water to the upper portion of an upper open test tank (1) which can be filled with soil (2) to be buried environment,
An underground environment testing device characterized by having an overflow tray (4) for discharging excess water on the side surface, an observation window (5), and a drain outlet (7) with a water shutoff valve (6) at the bottom.
たことを特徴とする特許請求の範囲第１項記載の土中環
境試験装置。2. The soil environment test apparatus according to claim 1, further comprising a heater (11) provided inside the test tank (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10918289A JPH0648241B2 (en) | 1989-05-01 | 1989-05-01 | Underground environment test equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10918289A JPH0648241B2 (en) | 1989-05-01 | 1989-05-01 | Underground environment test equipment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH02291945A JPH02291945A (en) | 1990-12-03 |
| JPH0648241B2 true JPH0648241B2 (en) | 1994-06-22 |
Family
ID=14503728
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10918289A Expired - Lifetime JPH0648241B2 (en) | 1989-05-01 | 1989-05-01 | Underground environment test equipment |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0648241B2 (en) |
Families Citing this family (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007271541A (en) * | 2006-03-31 | 2007-10-18 | Tokiko Techno Kk | Corrosion diagnosis device of underground embedded structure, and corrosion diagnostic method |
| JP6348454B2 (en) * | 2015-06-03 | 2018-06-27 | 日本電信電話株式会社 | Test apparatus and test method |
| JP6717149B2 (en) * | 2015-10-06 | 2020-07-01 | 日本製鉄株式会社 | Test tank, test equipment and test method |
| JP6449757B2 (en) * | 2015-11-17 | 2019-01-09 | 日本電信電話株式会社 | Test apparatus and test method |
| JP6543221B2 (en) * | 2016-06-02 | 2019-07-10 | 日本電信電話株式会社 | Soil corrosion test apparatus and test method thereof |
| JP6712543B2 (en) * | 2016-12-05 | 2020-06-24 | 日本電信電話株式会社 | Corrosion amount estimation device and method |
| JP6793108B2 (en) * | 2017-11-29 | 2020-12-02 | 日本電信電話株式会社 | Corrosion amount estimation device and its method |
| CN107907662A (en) * | 2017-12-15 | 2018-04-13 | 东北林业大学 | A kind of multifunctional earth model assay systems and method |
| JP7029060B2 (en) * | 2018-05-24 | 2022-03-03 | 日本電信電話株式会社 | Corrosion rate estimator and its method |
| US11906419B2 (en) * | 2019-05-10 | 2024-02-20 | Nippon Telegraph And Telephone Corporation | Corrosiveness prediction device and method |
| JP7747014B2 (en) * | 2023-03-27 | 2025-10-01 | Ｊｆｅスチール株式会社 | Accelerated deterioration test method for coating films |
-
1989
- 1989-05-01 JP JP10918289A patent/JPH0648241B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH02291945A (en) | 1990-12-03 |
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