JPH0449052B2 - - Google Patents
Info
- Publication number
- JPH0449052B2 JPH0449052B2 JP57051049A JP5104982A JPH0449052B2 JP H0449052 B2 JPH0449052 B2 JP H0449052B2 JP 57051049 A JP57051049 A JP 57051049A JP 5104982 A JP5104982 A JP 5104982A JP H0449052 B2 JPH0449052 B2 JP H0449052B2
- Authority
- JP
- Japan
- Prior art keywords
- powder
- hopper
- pipe
- weighing
- flexible
- 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
- 239000000843 powder Substances 0.000 claims description 78
- 238000005303 weighing Methods 0.000 claims description 53
- 238000005259 measurement Methods 0.000 claims 2
- 230000005484 gravity Effects 0.000 description 3
- 238000010926 purge Methods 0.000 description 3
- 230000002159 abnormal effect Effects 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 101150093826 par1 gene Proteins 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01G—WEIGHING
- G01G13/00—Weighing apparatus with automatic feed or discharge for weighing-out batches of material
- G01G13/02—Means for automatically loading weigh pans or other receptacles, e.g. disposable containers, under control of the weighing mechanism
- G01G13/022—Material feeding devices
- G01G13/028—Material feeding devices by pneumatic carrying means
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Weight Measurement For Supplying Or Discharging Of Specified Amounts Of Material (AREA)
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明は、微粉炭、セメント、水処理剤などの
粉体を気送するためなどに用いる粉体計量装置に
関する。DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a powder measuring device used for pneumatically conveying powder such as pulverized coal, cement, water treatment agents, etc.
（従来の技術）
従来、この種の粉体計量装置は内部を加圧した
計量ホツパーおよび該計量ホツパーの全体重量を
計測して該ホツパー内の粉体の送気による減少分
を捉える秤量装置を含んで構成されている。秤量
装置によつて計量ホツパーの全体重量を常に計測
し得るようにするため、計量ホツパーの粉体導入
口、計量ホツパーの下部に設けられた粉体供給装
置の粉体送出口、および圧力気体導入口等に接続
される管にはフレキシブルパイプが設けられてい
る。(Prior Art) Conventionally, this type of powder weighing device includes a weighing hopper whose inside is pressurized and a weighing device that measures the entire weight of the weighing hopper and captures the decrease in powder in the hopper due to air supply. It is composed of: In order to be able to always measure the entire weight of the weighing hopper with the weighing device, the powder inlet of the weighing hopper, the powder outlet of the powder supply device provided at the bottom of the weighing hopper, and the pressure gas introduction A flexible pipe is provided as a pipe connected to the mouth, etc.
（発明が解決しようとする課題）
しかしながら、従来の粉体計量装置では、計量
ホツパーにおける実際の重量と秤量装置により計
測された重量値との間に誤差が生じ、計量ホツパ
ーの重量変化（減少）による粉体の定量気送が精
度よく制御できないという問題があつた。(Problem to be Solved by the Invention) However, in conventional powder weighing devices, an error occurs between the actual weight in the weighing hopper and the weight value measured by the weighing device, resulting in a change (decrease) in the weight of the weighing hopper. There was a problem in that the quantitative pneumatic delivery of powder could not be controlled accurately.
本発明の目的は、内部が加圧され且つ種々の管
が接続された計量ホツパーの正確な重量を秤量装
置によつて計測し得るようにした粉体計量装置を
提供することにある。 SUMMARY OF THE INVENTION An object of the present invention is to provide a powder weighing device that allows a weighing device to accurately measure the weight of a weighing hopper whose interior is pressurized and to which various pipes are connected.
（課題を解決するための手段）
本発明の粉体計量装置は、全体重量を秤量装置
により計測可能に支持され下部に粉体供給装置が
結合された計量ホツパーと、該計量ホツパーに接
続された少なくとも送気パイプおよび均圧管並び
に前記粉体供給装置に接続された他の送気パイプ
および粉体送出パイプにそれぞれ設けられたフレ
キシブルパイプとを含み、前記計量ホツパーおよ
び前記粉体供給装置への加圧気体の導入により該
計量ホツパーに対し上向きの押し上げ力が作用す
る１つ若しくは複数の前記フレキシブルパイプの
断面積の和と下向きの押し下げ力が作用する１つ
若しくは複数の前記フレキシブルパイプの断面積
の和とを等しくしたことを特徴とする。(Means for Solving the Problems) The powder weighing device of the present invention includes a weighing hopper that is supported so that the entire weight can be measured by a weighing device and a powder supply device is connected to the lower part, and a powder weighing device that is connected to the weighing hopper. The metering hopper includes at least an air supply pipe, a pressure equalization pipe, another air supply pipe connected to the powder supply device, and a flexible pipe provided in the powder delivery pipe, and is connected to the metering hopper and the powder supply device. The sum of the cross-sectional areas of the one or more flexible pipes on which an upward push-up force acts on the metering hopper due to the introduction of pressurized gas and the cross-sectional area of the one or more flexible pipes on which a downward push-down force acts on the metering hopper. It is characterized by making the sum equal.
（作用）
本発明の粉体計量装置によると、計量ホツパー
および粉体供給装置に加圧気体が送気されて内部
の圧力が上がると、各配管に設けられたフレキシ
ブルパイプにはその接続のし方によつて上向き又
は下向きのいずれかの力が発生し、この力により
計量ホツパーは押し上げられ又は押し下げられ
る。各フレキシブルパイプに発生する力の大きさ
は、その断面積に比例する。従つて、上向きの力
が発生する１つ若しくは複数のフレキシブルパイ
プの断面積の和と、下向きの力が発生する１つ若
しくは複数のフレキシブルパイプの断面積の和と
が等しく構成されているため、計量ホツパーに作
用する全ての上向きの力即ち押し上げ力と全ての
下向きの力即ち押し下げ力との大きさが等しく、
従つて両作用力が相殺されて計量ホツパーの実際
の重量が秤量装置によつて計測される。(Function) According to the powder measuring device of the present invention, when pressurized gas is supplied to the weighing hopper and the powder supply device and the internal pressure rises, the flexible pipe provided in each piping has its connection. Depending on the direction, either an upward or downward force is generated, which forces the metering hopper up or down. The magnitude of the force generated on each flexible pipe is proportional to its cross-sectional area. Therefore, since the sum of the cross-sectional areas of one or more flexible pipes in which an upward force is generated is equal to the sum of the cross-sectional areas of one or more flexible pipes in which a downward force is generated, The magnitude of all upward forces, or pushing up forces, acting on the weighing hopper and all downward forces, or pushing down forces, acting on the weighing hopper are equal in magnitude;
Therefore, the two acting forces cancel each other out and the actual weight of the weighing hopper is measured by the weighing device.
（実施例）
以下、本発明の粉体計量装置を添付図面に示さ
れた実施例について更に詳細に説明する。(Example) Hereinafter, the powder measuring device of the present invention will be described in more detail with reference to the embodiment shown in the accompanying drawings.
図には本発明の一実施例に係る粉体計量装置が
示されている。当該図において、１はサービスホ
ツパーであり、このホツパー１の上端部に形成さ
れた粉体供給口２はフレキシブルパイプ３の上下
に開閉弁４，５をそれぞれ設けた継手６で貯蔵ホ
ツパー７と接続されている。この貯蔵ホツパー７
は本粉体計量装置の枠体（図示せず）に固定され
ている。 The figure shows a powder measuring device according to an embodiment of the present invention. In this figure, 1 is a service hopper, and a powder supply port 2 formed at the upper end of this hopper 1 is connected to a storage hopper 7 by a joint 6 with on-off valves 4 and 5 provided at the top and bottom of a flexible pipe 3, respectively. It is connected. This storage hopper 7
is fixed to the frame (not shown) of the powder measuring device.
サービスホツパー１の下端部に形成された粉体
排出口８は、サービスホツパー１の下方に配置さ
れた計量ホツパー９の上端部に形成された粉体導
入口１０に継手１１を備えた粉体補給管により接
続されている。この継手１１は２つの開閉弁１
３，１４とその間に設けられたフレキシブルパイ
プ１２とから構成されている。 A powder outlet 8 formed at the lower end of the service hopper 1 is connected to a powder inlet 10 formed at the upper end of the weighing hopper 9 disposed below the service hopper 1 with a fitting 11. Connected by body supply tubes. This joint 11 is used for two on-off valves 1
3 and 14 and a flexible pipe 12 provided between them.
計量ホツパー９の下部には粉体気送用のロータ
リー式粉体供給装置１５が一体に結合され、この
粉体供給装置１５の下端部には粉体送出口１６が
形成されている。この粉体送出口１６はフレキシ
ブルパイプ１７を適所にもつ粉体送出パイプ１８
によつて粉体供給装置１５の下方に設置した気送
用混合器１９に接続され、この混合器１９の吐出
側には粉体気送パイプ２０が連通されている。ま
た、サービスホツパー１および計量ホツパー９
は、本装置の粉体に設けられたロードセルのよう
な秤量装置２１および２２によつてそれぞれその
全体重量を計測可能に支持されている。 A rotary powder supply device 15 for pneumatically feeding powder is integrally connected to the lower part of the weighing hopper 9, and a powder delivery port 16 is formed at the lower end of the powder supply device 15. This powder delivery port 16 has a powder delivery pipe 18 with a flexible pipe 17 in place.
is connected to a pneumatic mixer 19 installed below the powder supply device 15, and a powder pneumatic pipe 20 is connected to the discharge side of the mixer 19. In addition, service hopper 1 and weighing hopper 9
are supported by weighing devices 21 and 22, such as load cells, provided on the powder of this device so that their entire weights can be measured, respectively.
サービスホツパー１、計量ホツパー９および粉
体供給装置１５における加圧気体入口２３，２４
および２５はそれぞれ開閉弁２６，２７，２８を
有する送気パイプ２９，３０，３１の先端開口で
形成され、これらの送気パイプ２９，３０，３１
には開閉弁２６，２７，２８と各ホツパー１，９
および粉体供給装置１５との間にフレキシブルパ
イプ３２，３３，３４が設けられ、且つ送気パイ
プ２９，３０，３１は混合器１９への送気パイプ
３５と共に同一のブロワのような圧力気体源（図
示せず）と連通されている。また、計量ホツパー
９の上部に形成された加圧気体出口３６にはフレ
キシブルパイプ４３および開閉弁３７を有する均
圧管３９が連通され、この均圧管３９は更に均圧
管４０を介してサービスホツパー１の上端部でそ
の内部に連通している。２つの均圧管３９，４０
の接続部には圧抜パイプが接続され、その先端は
開閉弁３８を介して大気に開放されている。更
に、継手１１の開閉弁１３，１４間には開閉弁４
２を備えるパージパイプ４１の一端が連通され、
このパイプ４１の他端が大気に開口されている。 Pressurized gas inlets 23, 24 in the service hopper 1, metering hopper 9 and powder supply device 15
and 25 are formed by the tip openings of air supply pipes 29, 30, 31 having on-off valves 26, 27, 28, respectively, and these air supply pipes 29, 30, 31
There are on-off valves 26, 27, 28 and each hopper 1, 9.
Flexible pipes 32, 33, 34 are provided between the pump and the powder supply device 15, and the air supply pipes 29, 30, 31 and the air supply pipe 35 to the mixer 19 are connected to the same pressure gas source such as a blower. (not shown). Further, a pressure equalizing pipe 39 having a flexible pipe 43 and an on-off valve 37 is communicated with the pressurized gas outlet 36 formed at the upper part of the weighing hopper 9, and this pressure equalizing pipe 39 is further connected to the service hopper 1 through a pressure equalizing pipe 40. It communicates with the interior at its upper end. Two pressure equalizing pipes 39, 40
A depressurizing pipe is connected to the connecting portion, and the tip thereof is opened to the atmosphere via an on-off valve 38. Further, an on-off valve 4 is provided between the on-off valves 13 and 14 of the joint 11.
One end of a purge pipe 41 comprising 2 is connected to the
The other end of this pipe 41 is opened to the atmosphere.
フレキシブルパイプには計量ホツパー９が加圧
されると該フレキシブルパイプの接続のされ方に
より上向き又は下向きの力が発生する。すなわち
例えばフレキシブルパイプ３３は計量ホツパー９
への連通管が該フレキシブルパイプ３３の上端部
に接続されているため、当該パイプ３３には計量
ホツパー９を押し上げるような上向きの力が発生
する。この時の力の大きさはフレキシブルパイプ
３３の断面積に比例する。そこで、送気パイプ３
０，３１に設けられたフレキシブルパイプ３３，
３４、粉体送出パイプ１８に設けられたフレキシ
ブルパイプ１７，および均圧管３９に設けられた
フレキシブルパイプ４３は各フレキシブルパイプ
に生ずる力の方向および大きさが均衡するように
配置構成されている。例えば、図においては、フ
レキシブルパイプ１７，３３，３４に発生する作
用力の方向は上向きであり、またフレキシブルパ
イプ４３に発生する作用力は下向きである。従つ
て、フレキシブルパイプ４３の断面積とフレキシ
ブルパイプ１７，３３，３４の断面積の和とが等
しくされて、計量ホツパー９に作用する上向きの
力の大きさと下向きの力の大きさが均衡するよう
にされている。なお、力の均衡はそれぞれのフレ
キシブルパイプの断面積で構成されるが、その際
一般的には各フレキシブルパイプが同方向即ち垂
直方向になるように配置することが好ましい。 When the metering hopper 9 pressurizes the flexible pipe, an upward or downward force is generated depending on how the flexible pipe is connected. That is, for example, the flexible pipe 33 is connected to the weighing hopper 9.
Since the communication pipe to the flexible pipe 33 is connected to the upper end of the flexible pipe 33, an upward force that pushes up the weighing hopper 9 is generated in the pipe 33. The magnitude of the force at this time is proportional to the cross-sectional area of the flexible pipe 33. Therefore, air supply pipe 3
Flexible pipe 33 provided at 0,31,
34, the flexible pipe 17 provided on the powder delivery pipe 18 and the flexible pipe 43 provided on the pressure equalization pipe 39 are arranged so that the direction and magnitude of the force generated on each flexible pipe are balanced. For example, in the figure, the acting force generated on the flexible pipes 17, 33, and 34 is directed upward, and the acting force generated on the flexible pipe 43 is directed downward. Therefore, the cross-sectional area of the flexible pipe 43 and the sum of the cross-sectional areas of the flexible pipes 17, 33, and 34 are made equal, so that the magnitude of the upward force and the magnitude of the downward force acting on the weighing hopper 9 are balanced. is being used. Note that the force balance is determined by the cross-sectional area of each flexible pipe, and in this case, it is generally preferable that the flexible pipes are arranged in the same direction, that is, in the vertical direction.
次に、前述のように構成された実施例の粉体計
量装置における動作について説明する。 Next, the operation of the powder measuring device of the embodiment configured as described above will be explained.
計量ホツパー９に上限まで粉体が投入されてい
る状態で、粉体供給装置１５を駆動させると、圧
力気体源から所要圧力に調整されている空気のよ
うな気体が送気パイプ３０，３１，３５から計量
ホツパー９、粉体供給装置１５および気送用混合
器１９に供給される。これによつて、計量ホツパ
ー９内の粉体は重力と加圧気体との作用で粉体供
給装置１５のロータの回転により、所定量ずつ切
出されて粉体送出パイプ１８を通り、気送用混合
器１９に送られ、これにも加圧気体が送られてい
るため、この気体と混合して粉体気送パイプ２０
で所要の機器、装置へ供給される。この場合、均
圧管３９の開閉弁３７、両ホツパー１，９間の継
手１１の開閉弁１３，１４、サービスホツパー１
の送気パイプ２９の開閉弁２６は閉鎖され、計量
ホツパー９、粉体供給装置１５、気送用混合器１
９内圧力が低下することを防止する。 When the powder supply device 15 is driven with the powder being charged up to the upper limit in the metering hopper 9, gas such as air whose pressure has been adjusted to the required pressure is supplied from the pressure gas source to the air supply pipes 30, 31, 35 to the metering hopper 9, powder supply device 15 and pneumatic mixer 19. As a result, the powder in the weighing hopper 9 is cut out in predetermined amounts by the rotation of the rotor of the powder supply device 15 under the action of gravity and pressurized gas, passes through the powder delivery pipe 18, and is pneumatically delivered. The powder is sent to the powder mixer 19, and since pressurized gas is also sent to this, it is mixed with this gas and the powder is sent to the powder pneumatic pipe 20.
is supplied to the required equipment and equipment. In this case, the on-off valve 37 of the pressure equalizing pipe 39, the on-off valves 13 and 14 of the joint 11 between both hoppers 1 and 9, and the service hopper 1
The on-off valve 26 of the air supply pipe 29 is closed, and the measuring hopper 9, the powder supply device 15, and the air supply mixer 1 are closed.
9 to prevent the internal pressure from decreasing.
そして、サービスホツパー１内が空になつてい
る場合は、貯蔵ホツパー７からサービスホツパー
１内に粉体を入れる。すなわち、開閉弁３７，１
３，１４，２６は閉じたままで、開閉弁３８、サ
ービスホツパー１と貯蔵ホツパー７との間の継手
６の開閉弁４，５を開き、貯蔵ホツパー７から重
力によつて粉体をサービスホツパー１内に落下さ
せる。なお、この場合に、サービスホツパー１内
に落下する粉体と置換してこのホツパー１内の気
体を均圧管４０を利用して圧抜パイプ３９の開閉
弁３８を経て大気ヘ放出する。このサービスホツ
パー１への粉体の送入は計量ホツパー９内の粉体
が下限まで達しないうちに完了し、サービスホツ
パー１内の粉体が上限に達する。 If the service hopper 1 is empty, powder is poured into the service hopper 1 from the storage hopper 7. That is, the on-off valve 37,1
3, 14, and 26 remain closed, the on-off valve 38 and the on-off valves 4 and 5 of the joint 6 between the service hopper 1 and the storage hopper 7 are opened, and the powder is removed from the storage hopper 7 by gravity. Make it fall within par 1. In this case, the gas in the hopper 1 is replaced with the powder falling into the service hopper 1 and released into the atmosphere through the on-off valve 38 of the pressure relief pipe 39 using the pressure equalization pipe 40. The feeding of the powder to the service hopper 1 is completed before the powder in the weighing hopper 9 reaches the lower limit, and the powder in the service hopper 1 reaches the upper limit.
サービスホツパー１内の粉体が上限に達する
と、これを秤量装置２１や図示しないレベル計な
どで検出して、開閉弁３８，４，５を閉じ、開閉
弁２６を開く。これによつて、送気パイプ２９か
らサービスホツパー１内に加圧気体が導入され
る。なお、この場合に開閉弁３７，１３，１４は
閉じたままである。サービスホツパー１内の圧力
が計量ホツパー９内の圧力と均等になるまで高く
なると、これを圧力計（図示せず）で検出して開
閉弁２６を閉じ、この状態を計量ホツパー９内の
粉体が下限に達するまで維持する。 When the powder in the service hopper 1 reaches its upper limit, this is detected by the weighing device 21 or a level meter (not shown), the on-off valves 38, 4, 5 are closed, and the on-off valve 26 is opened. As a result, pressurized gas is introduced into the service hopper 1 from the air supply pipe 29. In this case, the on-off valves 37, 13, and 14 remain closed. When the pressure in the service hopper 1 becomes equal to the pressure in the weighing hopper 9, this is detected by a pressure gauge (not shown) and the on-off valve 26 is closed. Maintain until your body reaches the lower limit.
計量ホツパー９から気送用混合器１９への粉体
の供給は、前述したサービスホツパー１への粉体
の送入およびサービスホツパー１と計量ホツパー
９との均圧動作中も続けられる。計量ホツパー９
内の粉体が下限に達すると、開閉弁３７，１３，
１４を開く。これによつてサービスホツパー１か
ら粉体が重力で計量ホツパー９に短時間内に補給
される。この場合に、計量ホツパー９に補給され
る粉体と置換してこのホツパー９内の空気が均圧
管３９，４０を経てサービスホツパー１へ導かれ
るので、両ホツパー１，９内の圧力は均等に保た
れる。サービスホツパー１内の粉体の全部が計量
ホツパー９に補給されてこのホツパー９内の粉体
が上限に達すると、これを検出して開閉弁３７，
１３，１４を閉じ、以下前述した動作を繰返す。 The supply of powder from the metering hopper 9 to the pneumatic mixer 19 continues during the above-described feeding of the powder to the service hopper 1 and the pressure equalization operation between the service hopper 1 and the metering hopper 9. Weighing hopper 9
When the powder inside reaches the lower limit, the on-off valves 37, 13,
Open 14. As a result, powder is replenished from the service hopper 1 to the weighing hopper 9 by gravity within a short time. In this case, the air in this hopper 9 is replaced with the powder supplied to the weighing hopper 9 and is led to the service hopper 1 via the pressure equalization pipes 39 and 40, so the pressure in both hoppers 1 and 9 is equalized. is maintained. When all of the powder in the service hopper 1 is replenished to the weighing hopper 9 and the powder in this hopper 9 reaches the upper limit, this is detected and the on-off valve 37
13 and 14, and repeat the above-described operation.
そして、サービスホツパー１から計量ホツパー
９へ粉体を補給して、これらのホツパー１，９間
の継手１１の粉体切出し用の開閉弁１３および排
出用の開閉弁１４を閉じた後、これを検出して開
閉弁１３，１４間に開口するパージパイプ４１の
開閉弁４２を開き、フレキシブルパイプ１２内な
ど継手１１の開閉弁１３，１４間に残留する加圧
気体をパージパイプ４１から大気に放出する。従
つて、粉体補給管に設けられたフレキシブルパイ
プ１２には計量ホツパー９を押し下げるような力
の発生はない。 Then, after replenishing the powder from the service hopper 1 to the weighing hopper 9 and closing the on-off valve 13 for cutting out the powder and the on-off valve 14 for discharging the joint 11 between these hoppers 1 and 9, this is detected, the on-off valve 42 of the purge pipe 41 that opens between the on-off valves 13 and 14 is opened, and the pressurized gas remaining between the on-off valves 13 and 14 of the joint 11 such as in the flexible pipe 12 is released from the purge pipe 41 to the atmosphere. discharge. Therefore, no force is generated in the flexible pipe 12 provided in the powder supply pipe that would push down the weighing hopper 9.
計量ホツパー９が加圧され且つ粉体供給装置１
５に加圧気体が送気されて粉体を気送する時、前
述したようにフレキシブルパイプ１７，３３，３
４には計量ホツパー９を押し上げようとする上向
きの力が作用し、またフレキシブルパイプ４３に
計量ホツパー９を押し下げようとする下向きの力
が作用する。そして、これら相反する方向の力
は、フレキシブルパイプ１７，３３，３４の断面
積の和とフレキシブルパイプ４３の断面積とが等
しくされているため、その大きさが等しく、従つ
て相殺されることになる。例えば、フレキシブル
パイプ１７，３３，３４の直径をそれぞれ300mm，
200mm，100mmとすると、断面積の和は864cm2とな
り、その内圧が0.3Kg／cm2の時、259Kgの力が上向
きの力として発生し、他方、フレキシブルパイプ
４３の直径を331.7mmとするとその断面積は864cm2
となり、フレキシブルパイプ１７，３３，３４の
断面積の和と等しく、従つて同じ259Kgの力が下
向きの力として発生し、上向きの力と下向きの力
とは相殺される。その結果、フレキシブルパイプ
に発生する力によつては秤量装置２２の検出重量
に誤差を生じさせることがない。 The metering hopper 9 is pressurized and the powder supply device 1
When pressurized gas is sent to the flexible pipes 17, 33, and 3 to pneumatically transport the powder, the flexible pipes 17, 33, and 3
An upward force that tries to push up the weighing hopper 9 acts on the flexible pipe 43, and a downward force that tries to push down the weighing hopper 9 acts on the flexible pipe 43. Since the sum of the cross-sectional areas of the flexible pipes 17, 33, and 34 is equal to the cross-sectional area of the flexible pipe 43, the forces in these opposite directions are equal in magnitude and are therefore canceled out. Become. For example, the diameters of flexible pipes 17, 33, and 34 are each 300 mm,
If they are 200mm and 100mm, the sum of the cross-sectional areas is 864cm 2 , and when the internal pressure is 0.3Kg/cm 2 , a force of 259Kg is generated as an upward force.On the other hand, if the diameter of the flexible pipe 43 is 331.7mm, the Cross-sectional area is 864cm2
This is equal to the sum of the cross-sectional areas of the flexible pipes 17, 33, and 34. Therefore, the same force of 259 kg is generated as a downward force, and the upward force and downward force cancel each other out. As a result, the force generated in the flexible pipe does not cause an error in the weight detected by the weighing device 22.
なお、各フレキシブルパイプを固定する方向を
変化させれば前述した上下方向の力のかかり方を
逆にすることができる。従つて、力の均衡は各フ
レキシブルパイプ１７，３３，４３にかかる力の
方向を考慮して同方向に力が働くフレキシブルパ
イプの断面積の和を等しくすれば、計量ホツパー
９に作用する上向き、下向きの力が均衡する。 Note that by changing the direction in which each flexible pipe is fixed, the manner in which the force is applied in the vertical direction described above can be reversed. Therefore, the force balance can be determined by considering the direction of the force applied to each flexible pipe 17, 33, 43 and making the sum of the cross-sectional areas of the flexible pipes in which the force acts in the same direction equal, the upward force acting on the weighing hopper 9, The downward force is balanced.
また、前述した動作は、制御盤に検出信号を送
り、この制御盤からの指令により電気的手段、或
いはこれを圧縮空気などを用いて自動制御で行な
うことができる。更に、この実施例において、計
量ホツパーに粉体の異常下限を検出して全装置を
停止させる手段を設けたりすることも好ましい。 Further, the above-mentioned operation can be performed by automatic control by sending a detection signal to a control panel and using commands from the control panel electrically or by using compressed air or the like. Furthermore, in this embodiment, it is also preferable that the weighing hopper is provided with means for detecting the abnormal lower limit of the powder and stopping the entire apparatus.
（発明の効果）
以上説明したように、本発明の粉体計量装置に
よれば、計量ホツパーおよび粉体供給装置に接続
された種々の配管に設けられたフレキシブルパイ
プの内上向きの力が発生するフレキシブルパイプ
の断面積の和と下向きの力が発生するフレキシブ
ルパイプの断面積の和とを等しくしたことによ
り、加圧気体によつて加圧状態で秤量する計量ホ
ツパーの秤量を高精度に行なうことができる。(Effects of the Invention) As explained above, according to the powder measuring device of the present invention, an upward force is generated in the flexible pipes provided in various pipings connected to the measuring hopper and the powder supply device. By making the sum of the cross-sectional areas of the flexible pipes equal to the sum of the cross-sectional areas of the flexible pipes where downward force is generated, a weighing hopper that weighs in a pressurized state with pressurized gas can weigh with high accuracy. I can do it.
図は本発明の一実施例に係る粉体計量装置を示
す構成説明図である。
９……計量ホツパー、１５……粉体供給装置、
１７……フレキシブルパイプ、１８……粉体送出
パイプ、２２……秤量装置、３０，３１……送気
パイプ、３３，３４，４３……フレキシブルパイ
プ。
The figure is a configuration explanatory diagram showing a powder measuring device according to an embodiment of the present invention. 9...Measuring hopper, 15...Powder supply device,
17... Flexible pipe, 18... Powder delivery pipe, 22... Weighing device, 30, 31... Air supply pipe, 33, 34, 43... Flexible pipe.
Claims (1)
れ下部に粉体供給装置が結合された計量ホツパー
と、該計量ホツパーに接続された少なくとも送気
パイプおよび均圧管並びに前記粉体供給装置に接
続された他の送気パイプおよび粉体送出パイプに
それぞれ設けられたフレキシブルパイプとを含
み、前記計量ホツパーおよび前記粉体供給装置へ
の加圧気体の導入により該計量ホツパーに対し上
向きの押し上げ力が作用する１つ若しくは複数の
前記フレキシブルパイプの断面積の和と下向きの
押し下げ力が作用する１つ若しくは複数の前記フ
レキシブルパイプの断面積の和とを等しくしたこ
とを特徴とする粉体計量装置。1. A weighing hopper which is supported so that the entire weight can be measured by a weighing device and has a powder supply device connected to its lower part, and at least an air supply pipe and a pressure equalization pipe connected to the weighing hopper, and which are connected to the powder supply device. and a flexible pipe provided in each of the other air supply pipes and the powder delivery pipe, and an upward pushing force acts on the measurement hopper by introducing pressurized gas into the measurement hopper and the powder supply device. A powder measuring device characterized in that the sum of the cross-sectional areas of the one or more flexible pipes is equal to the sum of the cross-sectional areas of the one or more flexible pipes on which a downward pressing force acts.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5104982A JPS58168918A (en) | 1982-03-31 | 1982-03-31 | Weighing apparatus of powdered body |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5104982A JPS58168918A (en) | 1982-03-31 | 1982-03-31 | Weighing apparatus of powdered body |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS58168918A JPS58168918A (en) | 1983-10-05 |
| JPH0449052B2 true JPH0449052B2 (en) | 1992-08-10 |
Family
ID=12875941
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5104982A Granted JPS58168918A (en) | 1982-03-31 | 1982-03-31 | Weighing apparatus of powdered body |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS58168918A (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2609548A1 (en) * | 1987-01-09 | 1988-07-15 | Perquis Vincent | Device for metering, by weighing, products contained in double-opening containers |
| FR2631443A1 (en) * | 1988-05-16 | 1989-11-17 | Hasler Freres Int Sa | Silo-stored powder dosage - using intermediary conduit-connected enclosures to equalise pressure between silo level and extraction point |
| JP5880750B2 (en) * | 2015-03-03 | 2016-03-09 | 日本電気硝子株式会社 | Raw material powder blender |
| CN104864951A (en) * | 2015-04-30 | 2015-08-26 | 新疆农业科学院农业质量标准与检测技术研究所 | Quantitative weighing device |
-
1982
- 1982-03-31 JP JP5104982A patent/JPS58168918A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS58168918A (en) | 1983-10-05 |
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