JP5674095B2 - Liquid supply device - Google Patents

Description

本発明は加圧容器に注液する液体供給装置に関する。特に磁気記録媒体用材料、２次電池用極剤材料の粉体材料等を加圧しながら混合、混練する加圧型の混練装置に注液する液体供給装置に関する。   The present invention relates to a liquid supply device for injecting liquid into a pressurized container. In particular, the present invention relates to a liquid supply device that injects a liquid into a pressure-type kneading device that mixes and kneads a magnetic recording medium material, a powder material of an electrode material for a secondary battery, and the like while applying pressure.

磁気記録媒体用の磁性塗料や２次電池の電極用塗料の製造にあってはこれらの原材料である粉体材料、
合成樹脂、有機溶剤、各種添加剤を混合、混練装置で強力に混練、捏和操作を行なう工程を有している。 In the manufacture of magnetic paints for magnetic recording media and electrode paints for secondary batteries, these raw materials are powder materials,
It has a step of mixing a synthetic resin, an organic solvent and various additives, and strongly kneading and kneading with a kneading apparatus.

粉体原材料の微粒子化に伴い、混練操作において、凝集体である２次粒子を1次粒子に解しながら粉体の湿潤、分散剤、合成樹脂の吸着を行なうためには、強力なせん断力を有する混練機構が必要であり、従来の、混練物を上部から押さえ込まない上部開放型の混練装置から上方より加圧蓋を用いて混練物を加圧しながら混練する装置や筒内で2軸の混練羽根を高速回転させながら連続的に混練する装置が主流となりつつある。
原材料の混合、混練を効率的に行い、且つ粉体状態から混練状態を経て、最終的には、さらに粘度を下げて塗料状態へ良好に相変化させるためには、せん断力のかかる混練部分において溶剤あるいは樹脂液等の希釈剤を精度良く徐々に注液する必要がある。 As the powder raw material becomes finer, a powerful shearing force is required in the kneading operation to disperse the secondary particles that are aggregates into primary particles while adsorbing the powder, dispersing agent, and synthetic resin. A conventional kneading mechanism that presses the kneaded material from above using a pressure lid from above and from a conventional open upper kneading device that does not press the kneaded material from above, Devices that continuously knead while rotating the kneading blades at high speed are becoming mainstream.
In order to efficiently mix and knead the raw materials and go from the powder state to the kneaded state, and finally to further reduce the viscosity and make a good phase change to the paint state, in the kneaded part where shear force is applied It is necessary to slowly and accurately inject a diluent such as a solvent or a resin solution.

前述の開放型の混練装置では混練物の上方より希釈剤を滴下注液する方法が一般的であり、上方より蓋をして加圧しながら混練する装置においては混練物の上方より希釈剤を滴下注液する方法の他、混練槽の壁面や底面に注液口を設け、直接希釈剤を注液する方法がある。2軸の混練羽根を高速回転させる連続式混練装置においても処理装置の内壁面に注液口を設け直接希釈剤を注液する方法が提案されている。このような注液機構の一例が特許文献１、特許文献2に開示されている。 In the above-described open type kneading apparatus, a method in which a diluent is dropped and poured from above the kneaded material is generally used. In an apparatus for kneading while applying pressure with a lid from above, the diluent is dropped from above the kneaded material. In addition to the liquid injection method, there is a method in which a liquid injection port is provided on the wall surface or bottom surface of the kneading tank and the diluent is directly injected. Also in a continuous kneading apparatus that rotates a biaxial kneading blade at a high speed, a method of injecting a diluent directly by providing a liquid injection port on the inner wall surface of the processing apparatus has been proposed. An example of such a liquid injection mechanism is disclosed in Patent Document 1 and Patent Document 2.

特開平１１−１９７４８３号公報Japanese Patent Laid-Open No. 11-197483 特開平６−２６２０５２号公報JP-A-6-262052

しかしながら、これらの提案されている注液機構を加圧型の混練装置に用いると、注液の際、注液弁を開けた瞬間に混練材料が注液口より逆流し、弁体や注液部の内部に付着する問題がある。また注液に用いる希釈剤の材質、性状によっては、希釈剤が弁体や注液部の内部に凝集付着物を生成、固化する場合もあり、いずれの場合も注液機構の弁機能が不完全となる。   However, when these proposed injection mechanisms are used in a pressure-type kneading device, the kneading material flows backward from the injection port at the moment when the injection valve is opened, and the valve body and the injection unit There is a problem of sticking to the inside. In addition, depending on the material and properties of the diluent used for injection, the diluent may produce agglomerated deposits and solidify inside the valve body and the injection part. Become complete.

特許文献１で開示されている注液機構は、混練室内に対し出没可能の噴射ノズルを備えているが、特に加圧には対応しておらず、加圧蓋でより強固に混練物を加圧混練した場合、希釈によって混練物の粘度が低くなるに従い、注液口を混練装置内部に突出させた瞬間に混練物が注液口に逆流し閉塞させてしまう懸念がある。また注液物の供給が停止された瞬間にも注液口の内圧より処理槽側の圧力が高い場合、混練物が逆流して注液口を閉塞させる懸念がある。閉塞が発生した場合は注液機構の分解清掃が必要となり多大な工数が必要となる。 The liquid injection mechanism disclosed in Patent Document 1 includes an injection nozzle that can be moved into and out of the kneading chamber. However, the injection mechanism is not particularly suitable for pressurization, and the kneaded material is more strongly applied with a pressure lid. In the case of pressure kneading, as the viscosity of the kneaded product becomes lower due to dilution, there is a concern that the kneaded product flows back to the liquid inlet and closes at the moment when the liquid inlet is protruded into the kneading apparatus. In addition, if the pressure on the treatment tank side is higher than the inner pressure of the liquid injection port even at the moment when the supply of the liquid injection is stopped, there is a concern that the kneaded material may flow backward to close the liquid injection port. When the blockage occurs, the liquid injection mechanism needs to be disassembled and cleaned, which requires a great number of man-hours.

特許文献２で開示されている注液機構では、液の注入と停止に応じてばね手段またはエアシリンダの作用により弁部材を前進、後退させて液注入口を開閉し、混練物による液注入口の閉塞を防止しているが、さらに内部の弁体本体にまで逆流物や希釈剤による付着物が発生した場合、弁体部分での閉塞機能が不完全となり弁体と液供給部の間隙より希釈剤が混練装置側にいつまでも漏れ出る場合がある。
これら従来の注液機構では弁機構への付着物の発生を完全に防ぐことが出来ず、注液弁の開閉動作が妨げられ、混練、希釈工程における希釈剤の注液精度が著しく低下して混練物の品質低下を招いていた。 In the liquid injection mechanism disclosed in Patent Document 2, the valve member is advanced and retracted by the action of a spring means or an air cylinder according to the injection and stop of the liquid to open and close the liquid injection port, and the liquid injection port by the kneaded material However, if deposits due to backflow or diluent are generated even inside the valve body, the function of closing the valve body is incomplete and the gap between the valve body and the liquid supply section Diluent may leak into the kneading device forever.
These conventional injection mechanisms cannot completely prevent the deposit on the valve mechanism, hindering the opening and closing operation of the injection valve, and significantly reducing the accuracy of diluent injection in the kneading and dilution processes. The quality of the kneaded product was lowered.

本発明では上記従来技術の問題点を解決し、加圧型の混練装置においても確実に安定して液体材料を供給することが可能な液体供給装置を提供することを目的とする。   An object of the present invention is to solve the above-mentioned problems of the prior art and to provide a liquid supply apparatus capable of reliably and stably supplying a liquid material even in a pressure-type kneading apparatus.

本発明者らはタンクから供給ポンプを介して加圧型混練装置などの加圧容器に注液する液体供給装置の構成について鋭意検討を行なった結果、液体供給装置を下記の構成とすることにより上記目的を達成できることを見出し本発明をなすに至った。
すなわち、タンクから供給ポンプを介して加圧容器に注液する液体供給装置であって、前記加圧容器に接した注液流路にピストン形状の弁構造体を抜き差しして、流路の開閉を制御する第１の流路開閉手段であるピストンバルブが配置され、前記供給ポンプと前記ピストンバルブとの間にさらに別の弁構造を有する第２の流路開閉手段が配置されていることを特徴とする。 As a result of intensive studies on the configuration of a liquid supply device that injects liquid from a tank to a pressurized container such as a pressure-type kneading device via a supply pump, the above-described configuration is achieved by setting the liquid supply device to the following configuration. The inventors have found that the object can be achieved, and have made the present invention.
That is, a liquid supply device that injects liquid from a tank to a pressurized container via a supply pump, and opens and closes the flow path by inserting and removing a piston-shaped valve structure into and from the injected flow path in contact with the pressurized container. A piston valve which is a first flow path opening / closing means for controlling the flow rate is disposed, and a second flow path opening / closing means having another valve structure is disposed between the supply pump and the piston valve. Features.

上記の液体供給装置を使用して加圧容器に注液する液体供給方法であって、第1の流路開閉手段が開状態の場合は、必ず第１の流路開閉手段と第２の流路開閉手段との間の液圧力が加圧容器内から供給装置側へ逆流する液圧力より高くなるように供給ポンプの運転／停止、両開閉装置の開／閉タイミングおよび開度を制御することを特徴とする。
上記の第１の流路開閉装置と前記第２の流路開閉装置とを結ぶ配管長と配管内径との関係を（配管長／配管内径）＜２００とすることを特徴とする。 In the liquid supply method for injecting liquid into the pressurized container using the liquid supply device described above, when the first flow path opening / closing means is open, the first flow path opening / closing means and the second flow path are always Control the operation / stop of the supply pump, the opening / closing timing and the opening degree of both opening / closing devices so that the fluid pressure between the passage opening / closing means is higher than the fluid pressure flowing back from the inside of the pressurized container to the supplying device side. It is characterized by.
The relationship between the pipe length connecting the first flow path opening / closing apparatus and the second flow path opening / closing apparatus and the pipe inner diameter is (pipe length / pipe inner diameter) <200.

タンクから供給ポンプを介して加圧容器に注液する液体供給装置において、前記供給ポンプと第１の流路開閉装置であるピストン形状の弁構造体を抜き差しして、流路の開閉を制御するピストンバルブとの間に別の弁構造を有する第２の流路開閉手段を配置し、注液機構における弁機能の役割をそれぞれの流路開閉装置に分けて持たせているため、第１の流路開閉装置であるピストンバルブは注液口の閉塞を防ぐことに機能を特化でき、加圧容器内から第1の流路開閉装置に混練物が逆流してピストンバルブの弁体に付着して弁機能が不完全となったとしても、第２の流路開閉装置で液体材料の供給を確実に制御することができる。凝集、付着しやすい希釈剤の注液で第１の流路開閉装置の弁体に付着物が形成、付着固化しても同様に第２の流路開閉装置で液体材料の供給を確実に制御することができる。   In a liquid supply apparatus for injecting liquid into a pressurized container from a tank via a supply pump, the supply pump and a piston-shaped valve structure which is a first flow path opening / closing device are inserted and removed to control the opening and closing of the flow path. Since the second flow path opening / closing means having another valve structure is arranged between the piston valve and the role of the valve function in the liquid injection mechanism is divided into each flow path opening / closing device, The piston valve, which is a flow path opening / closing device, can be specialized in preventing the injection port from being blocked, and the kneaded material flows back from the pressurized container to the first flow path opening / closing device and adheres to the valve body of the piston valve. Even if the valve function becomes incomplete, the supply of the liquid material can be reliably controlled by the second flow path opening / closing device. Even if a deposit is formed on the valve body of the first flow path opening / closing device by injecting a diluent that easily aggregates and adheres, the supply of liquid material is reliably controlled by the second flow path opening / closing device as well. can do.

また第1の流路開閉手段が開状態の場合は、必ず第１の流路開閉手段と第２の流路開閉手段との間の液圧力が加圧容器内から供給装置側へ逆流する液圧力より高くなるように供給ポンプの運転／停止、両開閉装置の開／閉タイミングおよび開度を制御することにより混練装置の加圧容器側から混練物が第１の流路開閉装置側に逆流することを未然に防ぐことができる。
In addition, when the first flow path opening / closing means is in the open state, the liquid pressure between the first flow path opening / closing means and the second flow path opening / closing means always flows back from the inside of the pressurized container to the supply device side. By controlling the operation / stop of the supply pump and the opening / closing timing and opening degree of both opening / closing devices so as to be higher than the pressure, the kneaded material flows backward from the pressure vessel side of the kneading device to the first flow path opening / closing device side. Can be prevented in advance.

液体供給装置を適用した加圧型混練装置を示すイメージ図である。It is an image figure which shows the pressurization type kneading apparatus to which the liquid supply apparatus is applied. 一例の本発明の液体供給装置の注液停止時の様子を示す説明図である。It is explanatory drawing which shows the mode at the time of the liquid injection stop of the liquid supply apparatus of an example of this invention. 一例の本発明の液体供給装置の注液時の様子を示す説明図である。It is explanatory drawing which shows the mode at the time of liquid injection of the liquid supply apparatus of an example of this invention. 加圧型混練装置の加圧蓋を下げた時の様子を示すイメージ図である。It is an image figure which shows a mode when the pressurization lid | cover of a pressurization type kneading apparatus is lowered | hung. 加圧型混練装置の加圧蓋を上げた時の様子を示すイメージ図である。It is an image figure which shows a mode when the pressurization lid | cover of a pressurization type kneading apparatus is raised. 従来の液体供給装置の注液停止時の様子を示す説明図である。It is explanatory drawing which shows the mode at the time of the liquid injection stop of the conventional liquid supply apparatus. 従来の液体供給装置の注液時の様子を示す説明図である。It is explanatory drawing which shows the mode at the time of liquid injection of the conventional liquid supply apparatus. 従来の液体供給装置の注液時の逆流の様子を示す説明図である。It is explanatory drawing which shows the mode of the backflow at the time of liquid injection of the conventional liquid supply apparatus. 従来の液体供給装置の逆流、付着後の注液停止時の様子を示す説明図である。It is explanatory drawing which shows the mode at the time of the liquid injection stop after the backflow of the conventional liquid supply apparatus and adhesion. 液体供給装置の全体動作のフローチャート（一例）Flow chart of overall operation of liquid supply device (example) 液体供給装置の流路開閉制御のフローチャート（一例）Flow chart of flow path opening / closing control of liquid supply device (example)

以下、本発明に係る液体供給装置及び注液方法の実施形態を、加圧型混練装置に適用した場合を例にとって、図面に基づいて説明する。   DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments of a liquid supply apparatus and a liquid injection method according to the present invention will be described with reference to the drawings, taking as an example the case of application to a pressure-type kneading apparatus.

図１に加圧型混練装置のイメージ図を、図6に従来の液体供給装置の注液停止時の様子を示す説明図を示す。加圧型混練装置１０は混練槽１の内部に水平な２つの回転軸３、３が備えられ、この２つの軸３、３には、材料を撹拌、混練するブレード２、２が設けられている。混練槽の内部は回転するブレード２、２の外周に対して、少しの間隔を持たせた、断面繭形の形状にくり抜かれている。混練槽の上部には、同様に断面繭形を形成するような加圧蓋4が設けられ、空圧や油圧で加圧できる構造となっている。本実施形態の加圧型混練装置１０には、回転軸３、３の軸方向のこれらの軸を駆動するモータの配置されている側と反対側の混練槽の壁面１１に液体供給装置２０を取り付けてある。液体は、壁面１１に設けられた注液孔５から混練槽内に供給される。   FIG. 1 is an image diagram of a pressure-type kneading apparatus, and FIG. 6 is an explanatory diagram showing a state when liquid injection is stopped in a conventional liquid supply apparatus. The pressure-type kneading apparatus 10 is provided with two horizontal rotating shafts 3, 3 inside the kneading tank 1, and the two shafts 3, 3 are provided with blades 2, 2 for stirring and kneading the material. . The inside of the kneading tank is hollowed out in a cross-sectional shape having a slight gap with respect to the outer periphery of the rotating blades 2 and 2. In the upper part of the kneading tank, a pressure lid 4 having a cross-sectional shape is provided in the same manner, so that it can be pressurized with air pressure or hydraulic pressure. In the pressure-type kneading apparatus 10 of the present embodiment, a liquid supply apparatus 20 is attached to the wall surface 11 of the kneading tank on the opposite side to the side where the motor for driving these shafts in the axial direction of the rotary shafts 3 and 3 is disposed. It is. The liquid is supplied into the kneading tank through the liquid injection hole 5 provided in the wall surface 11.

実際の使用に当っては、まず加圧蓋４を上げた状態で、混練しようとする粉体材料や添加剤、樹脂、溶剤類が投入され、回転軸３、３が回転駆動される（図５）。しばらく回転を続けると粉体の嵩が下がってくるので、加圧蓋４で加圧される（図４）。この粉末の状態から、さらに回転を続けると粉体が固まり始めて、やがては餅を捏ねるような練り込み状態になり混練が始まる。 In actual use, first, with the pressure lid 4 raised, the powder material, additive, resin, and solvents to be kneaded are charged, and the rotary shafts 3 and 3 are rotationally driven (see FIG. 5). When the rotation is continued for a while, the bulk of the powder decreases, so that the pressure is applied by the pressure lid 4 (FIG. 4). If the powder is further rotated from this powdery state, the powder starts to harden and eventually becomes a kneaded state in which a kneading is made and kneading starts.

実際には、このような最初の１回の配合で混練操作を行なうことは少なく、調整や、より良好な混練状態を得るために、途中で樹脂液や溶剤の追加注液することが多い。また混練状態の後、混練槽に溶剤や樹脂液をさらに注液して混練（希釈操作）を行って粘度を下げ、塗料状態に徐々に近づけてゆく。これらの追加注液する溶剤、樹脂液は壁面１１に設けられた注液孔５から混練槽内に注液される。   Actually, the kneading operation is rarely performed in such a first one-time blending, and in order to obtain a better kneading state, the resin liquid and the solvent are often additionally injected on the way. Further, after the kneading state, a solvent or a resin liquid is further poured into the kneading tank and kneading (dilution operation) is performed to lower the viscosity, and gradually approach the paint state. These additional solvent and resin liquid are injected into the kneading tank through the injection hole 5 provided in the wall surface 11.

加圧蓋４で加圧されている混練物に注液する際や、粘度を下げた塗料に注液する際には、壁面１１に設けられた注液孔５にて混練物や塗料の逆流が発生し、弁閉塞を起こす、あるいはテーパー部２１ｂ、弁部２２ｂに付着して、弁閉鎖機能の不全を起こすという問題があった。また凝集、付着性の強い樹脂液や粉体を含むスラリー液を注液した場合にもテーパー部２１ｂ、あるいは弁部２２ｂに付着、固化して弁閉鎖機能の不全を起こすという問題があった。   When pouring into the kneaded material pressurized by the pressure lid 4 or when pouring into the paint with reduced viscosity, the kneaded material or the paint flows backward through the liquid injection hole 5 provided in the wall surface 11. Has occurred, causing valve blockage or adhering to the tapered portion 21b and the valve portion 22b, resulting in failure of the valve closing function. In addition, even when a slurry liquid containing a resin liquid or a powder having strong cohesion and adhesion is poured, there is a problem that the valve closing function fails due to adhesion and solidification to the tapered part 21b or the valve part 22b.

本発明者らは、このような不具合を対策するために、例えば上記のような加圧型混練装置のような加圧容器に注液できる液体供給装置について検討した。
図１に、本発明の液体供給装置を適用した加圧型混練装置のイメージ図を、図２に、一例の本発明の液体供給装置の構成を示す。本図は、注液停止時の状態を示している。本発明の液体供給装置は、第１の流路開閉手段であるピストンバルブ２０と、供給タンク５０と、これら２つを繋ぐ配管経路と、この配管経路に設けられたピストンバルブ２０と別構造の第２の流路開閉手段である開閉バルブ３０と、供給ポンプ４０を含み構成される。 In order to deal with such a problem, the present inventors have studied a liquid supply apparatus that can inject a liquid into a pressurized container such as the above-described pressurized kneading apparatus.
FIG. 1 shows an image of a pressure-type kneading apparatus to which the liquid supply apparatus of the present invention is applied, and FIG. 2 shows an example of the configuration of the liquid supply apparatus of the present invention. This figure has shown the state at the time of liquid injection stop. The liquid supply apparatus of the present invention has a piston valve 20 that is a first flow path opening / closing means, a supply tank 50, a piping path that connects these two, and a piston valve 20 provided in this piping path. An opening / closing valve 30 as a second flow path opening / closing means and a supply pump 40 are included.

ピストンバルブ２０は、供給液体が溜まるシリンダ２１と、注液を制御するピストン２２と、ピストン２２を駆動するエアシリンダ２３を含み構成される。シリンダ２１の混練槽の壁１１に取り付ける側は径が細く絞られて配管２１ａを形成している。ピストン２２の先端側は、配管２１ａの内径よりわずかに小さい外径に加工された挿入部２２ａを形成しており、混練材料１２が容易にはシリンダ２１の内部に侵入しないようになっている。また、ピストン２２の中央部は径が大きくなっており、配管２１ａのエアシリンダ２３側端部に押し付けて液体流路が開閉可能な弁部２２ｂを形成している。ピストンバルブ２０の流路開閉はシリンダ２１が細く絞られて配管２１ａを形成するまでのテーパー部２１ｂとこれに接するピストン２２の弁部２２ｂテーパー面部分の圧着によって行われ、ピストン２２の挿入部２２ａは配管２１ａへの混練材料の進入防止機能を有する。   The piston valve 20 includes a cylinder 21 in which supply liquid is stored, a piston 22 that controls liquid injection, and an air cylinder 23 that drives the piston 22. The side of the cylinder 21 attached to the wall 11 of the kneading tank is narrowed in diameter to form a pipe 21a. The distal end side of the piston 22 forms an insertion portion 22a processed to have an outer diameter slightly smaller than the inner diameter of the pipe 21a, so that the kneaded material 12 does not easily enter the cylinder 21. The central portion of the piston 22 has a large diameter, and forms a valve portion 22b that can be opened and closed by pressing against the end of the pipe 21a on the air cylinder 23 side. The opening and closing of the flow path of the piston valve 20 is performed by pressing the tapered portion 21b until the cylinder 21 is narrowed to form the pipe 21a and the tapered surface portion of the valve portion 22b of the piston 22 in contact with the tapered portion 21b. Has a function of preventing the kneaded material from entering the pipe 21a.

本発明の液体供給装置の基本的な動作について図１０にフローチャートで示すとともに、以下で説明する。先ず図２に注液停止時の状態を示す。シリンダ２１内でピストン２２は、エアシリンダ２３により混練槽１側に移動しており。弁部２２ｂは配管２１ａの端部のテーパー部２１ｂに圧着されて液体流路を遮断している。開閉バルブ３０は閉、供給ポンプ４０は停止状態であり、供給タンク５０と混練槽１とを結ぶ配管経路は完全に遮断されている。   The basic operation of the liquid supply apparatus of the present invention is shown in the flowchart of FIG. 10 and will be described below. First, FIG. 2 shows a state when the injection is stopped. The piston 22 is moved to the kneading tank 1 side by the air cylinder 23 in the cylinder 21. The valve portion 22b is pressure-bonded to the tapered portion 21b at the end of the pipe 21a to block the liquid flow path. The on-off valve 30 is closed, the supply pump 40 is stopped, and the piping path connecting the supply tank 50 and the kneading tank 1 is completely cut off.

次に図３に注液時の状態を示す。供給ポンプ４０の駆動、開閉バルブ３０の開動作と同時にエアシリンダ２３が動作(Ａ)し、ピストン２２がエアシリンダ側に移動(Ｂ)する。これに伴い弁部２２ｂが配管２１ａの壁面１１側の端部から離れてシリンダ２１内部に移動することにより液体流路の遮断が解除(Ｃ)され、液体の流通が可能になる。供給タンク５０内の液体５１が供給ポンプ４０により開になった開閉バルブ３０を経由してシリンダ２１に供給され、配管２１ａを経由して混練槽内に注液(Ｄ)される。 Next, FIG. 3 shows a state during injection. The air cylinder 23 operates (A) simultaneously with the driving of the supply pump 40 and the opening operation of the opening / closing valve 30, and the piston 22 moves to the air cylinder side (B). Along with this, the valve portion 22b moves away from the end portion on the wall surface 11 side of the pipe 21a and moves into the cylinder 21, whereby the liquid channel is unblocked (C), and the liquid can flow. The liquid 51 in the supply tank 50 is supplied to the cylinder 21 via the opening / closing valve 30 opened by the supply pump 40, and injected (D) into the kneading tank via the pipe 21a.

所定量の注液が完了すると、エアシリンダ２３が動作してピストン２２が、混練槽１側に移動(Ｅ)して、挿入部２２ａが配管２１ａに挿入され、これに伴い弁部２２ｂが配管２１ａのテーパー部２１ｂに押し付けられて、混練材料１２の配管２１ａへの進入を防ぐと伴に液体流路が遮断(Ｆ)される。これと同時に開閉バルブ３０が閉鎖され、供給ポンプ４０が停止(Ｇ)する。これにより、再び供給タンク５０と混練槽１とを結ぶ配管経路は完全に遮断される。   When a predetermined amount of liquid injection is completed, the air cylinder 23 operates to move the piston 22 to the kneading tank 1 side (E), and the insertion portion 22a is inserted into the pipe 21a. When pressed against the tapered portion 21b of 21a to prevent the kneaded material 12 from entering the pipe 21a, the liquid flow path is blocked (F). At the same time, the opening / closing valve 30 is closed and the supply pump 40 is stopped (G). Thereby, the piping path connecting the supply tank 50 and the kneading tank 1 again is completely blocked.

本発明の液体供給装置は、第１の流路開閉手段であるピストンバルブ２０の主機能を加圧型混練装置などの加圧容器内からの逆流物による注液孔５、配管２１ａの閉塞防止とし、供給ポンプ４０とピストンバルブ２０の間に配置した第２の流路開閉手段である開閉バルブ３０を主要な注液制御とすることにより、ピストンバルブ２０部分で逆流や凝集によって弁部２２ｂとシリンダ２１の内壁との間に混練材料１２が挟まっても確実に注液を停止できるようにしたものである。ここで用いる第２の流路開閉手段である開閉バルブ３０としては瞬時に完全な流路開閉が行えるバルブであれば特に制限は無く、ボールバルブ、ポペットバルブ、バタフライバルブ、シリンダバルブなどを用いることが出来る。 In the liquid supply apparatus of the present invention, the main function of the piston valve 20 which is the first flow path opening / closing means is to prevent the liquid injection hole 5 and the pipe 21a from being blocked by the backflow material from the inside of the pressurized container such as the pressurized kneading apparatus. The on-off valve 30 which is the second passage opening / closing means disposed between the supply pump 40 and the piston valve 20 is used as a main liquid injection control, so that the valve portion 22b and the cylinder are caused by backflow or aggregation at the piston valve 20 portion. The liquid injection can be surely stopped even when the kneaded material 12 is sandwiched between the inner wall 21. The opening / closing valve 30 as the second channel opening / closing means used here is not particularly limited as long as it is a valve capable of instantaneously opening and closing a complete channel, and a ball valve, a poppet valve, a butterfly valve, a cylinder valve, or the like is used. I can do it.

更にこれら一連の、注液開始／停止のバルブ動作時において、加圧容器側からピストンバルブ２０側に混練材料が逆流することを防ぐための好ましい動作について説明する。図１１に示したフローチャートのようにピストンバルブ２０が開状態の間（ピストンバルブ２０の開動作する瞬間から閉作動が終了するまでの間）は必ず前記のピストンバルブ２０から加圧容器への注液圧力が加圧容器側からピストンバルブ２０内部への逆流圧力より高くなるように供給ポンプ４０の運転停止タイミング、ピストンバルブ２０と開閉バルブ３０の開閉タイミング制御を行うことが好ましい。こうすることにより、配管２１ａを混練材料が逆流するのを防ぐことができる。 Further, a preferable operation for preventing the kneaded material from flowing backward from the pressurized container side to the piston valve 20 side during the series of injection start / stop valve operations will be described. As shown in the flowchart of FIG. 11, while the piston valve 20 is in the open state (from the moment when the piston valve 20 is opened until the closing operation is completed), the piston valve 20 is always supplied from the piston valve 20 to the pressurized container. It is preferable to control the operation stop timing of the supply pump 40 and the opening / closing timing of the piston valve 20 and the opening / closing valve 30 so that the liquid pressure becomes higher than the backflow pressure from the pressurized container side to the inside of the piston valve 20. By doing so, it is possible to prevent the kneaded material from flowing back through the pipe 21a.

具体的には、注液開始時にはピストンバルブ２０を閉のまま開閉バルブ３０を開動作すると同時に供給ポンプ４０を駆動(Ａ)して、圧力計４１により示される供給側の圧力値が混練槽側からシリンダ２１内へ逆流する圧力値を超えた(Ｂ)ところで、ピストンバルブ２０の開動作(Ｃ)を行い、流体経路の遮断を解除(Ｄ)すれば、混練材料１２が逆流することなく混練漕内に注液(Ｅ)することができるので好ましい。 Specifically, at the start of liquid injection, the opening and closing valve 30 is opened while the piston valve 20 is closed, and at the same time, the supply pump 40 is driven (A), and the pressure value on the supply side indicated by the pressure gauge 41 becomes the kneading tank side. When the pressure value to flow back into the cylinder 21 is exceeded (B), when the piston valve 20 is opened (C) and the fluid path is released (D), the kneaded material 12 does not flow back. It is preferable because it can be poured (E) into the tub.

また、注液停止時には、まずピストンバルブ２０を閉動作(Ｆ)して流体経路を遮断(Ｇ)し、圧力計４２により示されるシリンダ２１内の圧力値が注液時の圧力より少し高くなった(Ｈ)時に、開閉バルブ３０を閉(Ｉ)、供給ポンプ４０を駆動停止(Ｊ)とすると、シリンダ２１内の圧力を加圧容器側からの圧力より高く維持して注液停止できるので、混練材料が逆流することがないので好ましい。 When the injection is stopped, the piston valve 20 is first closed (F) to shut off the fluid path (G), and the pressure value in the cylinder 21 indicated by the pressure gauge 42 is slightly higher than the pressure at the time of injection. When the open / close valve 30 is closed (I) and the supply pump 40 is stopped (J) at the time of (H), the liquid injection can be stopped while maintaining the pressure in the cylinder 21 higher than the pressure from the pressurized container side. It is preferable because the kneaded material does not flow backward.

本発明の供給装置の場合は、仮にピストンバルブ２０中に、供給される液体５１が樹脂液や粉体を含むスラリー液でありこれらの固形分がシリンダ内に凝集付着しても、ピストンバルブ２０を閉状態で開閉バルブ３０を開操作、供給ポンプ４０を駆動して供給圧力を上げた状態の後、ピストンバルブ２０を一気に開状態にすると高圧の液体５１を勢いよく供給することができるので、凝集付着物をシリンダ２１の外に押し出すことができ、付着防止を図ることが出来る。 In the case of the supply device of the present invention, even if the liquid 51 to be supplied is a slurry liquid containing a resin liquid or a powder in the piston valve 20 and these solid contents are aggregated and adhered in the cylinder, the piston valve 20 When the piston valve 20 is opened all at once after opening the on-off valve 30 in the closed state and driving the supply pump 40 to increase the supply pressure, the high pressure liquid 51 can be vigorously supplied. Aggregated deposits can be pushed out of the cylinder 21 to prevent adhesion.

前述の制御例は一例であり、各装置の運転、開閉タイミングは本順序に制約されるものではない。第１の流路開閉装置であるピストンバルブ２０が開動作する瞬間から閉作動が終了するまでの間、常にピストンバルブ２０から加圧容器への注液圧が、加圧容器側からピストンバルブ２０側へ混練物が逆流する逆流圧以上の圧力となるようにポンプの回転数、運転／停止タイミング、両開閉装置の開閉タイミング、開度を制御すればよい。 The above control example is an example, and the operation and opening / closing timing of each device are not limited to this order. From the moment when the piston valve 20 serving as the first flow path opening / closing device is opened until the closing operation is completed, the liquid injection pressure from the piston valve 20 to the pressurized container is always maintained from the pressurized container side to the piston valve 20. The rotational speed of the pump, the operation / stop timing, the opening / closing timings of both the opening / closing devices, and the opening degree may be controlled so that the pressure is equal to or higher than the backflow pressure at which the kneaded material flows backward.

上記の各バルブ、供給ポンプの動作および制御をより確実にするためには、ピストンバルブ２０と開閉バルブ３０とを結ぶ配管長と配管内径との関係を（配管長／配管内径）＜２００とすることが好ましい。この範囲が好ましいのは、この範囲を超えて配管長が長くなると、各バルブの開閉動作、供給ポンプの動作を上述のように制御しようとしても、配管内に滞留する気体（空気）の影響や液体の慣性等の影響が大きくなって、流体の送液、停止の応答遅れが発生し、制御が困難になる場合があるからである。 In order to make the operation and control of each of the valves and the supply pump more reliable, the relationship between the pipe length connecting the piston valve 20 and the opening / closing valve 30 and the pipe inner diameter is (pipe length / pipe inner diameter) <200. It is preferable. This range is preferable because if the pipe length is longer than this range, the opening / closing operation of each valve and the operation of the supply pump are controlled as described above. This is because the influence of the inertia of the liquid is increased, and there is a delay in response of fluid feeding and stopping, which may make control difficult.

図６に第２の流路開閉手段である開閉バルブ３０の無い液体供給装置の例を示す。この例では、液体供給装置の構成が簡単になって良いように見えるが、本発明者らの検討によると種々問題があることが判明した。
この例の液体供給装置の動作について説明する。図６に注液停止時の状態を示す。シリンダ２１内でピストン２２は、エアシリンダ２３により混練槽１側に移動しており、弁部２２ｂは配管２１ａの端部のテーパー面２１ｂに圧着されて液体流路を遮断している。供給ポンプ４０は停止状態であり、供給タンク５０と混練槽１とを結ぶ配管経路は完全に遮断されている。

FIG. 6 shows an example of a liquid supply device without the opening / closing valve 30 as the second flow path opening / closing means. In this example, it seems that the configuration of the liquid supply device can be simplified, but it has been found by the inventors that there are various problems.
The operation of the liquid supply apparatus of this example will be described. FIG. 6 shows a state when the injection is stopped. In the cylinder 21, the piston 22 is moved to the kneading tank 1 side by the air cylinder 23, and the valve portion 22b is pressed against the tapered surface 21b at the end of the pipe 21a to block the liquid flow path. The supply pump 40 is in a stopped state, and the piping path connecting the supply tank 50 and the kneading tank 1 is completely cut off.

図７に注液時の状態を示す。供給ポンプ４０の駆動と同時にエアシリンダ２３が動作し、ピストン２２がエアシリンダ側に移動する。これに伴い弁部２２ｂが配管２１ａの壁面１１側の端部から離れてシリンダ２１内部に移動することにより液体流路の遮断が解除され、液体の流通が可能になる。供給タンク５０内の液体５１が供給ポンプ４０によりシリンダ２１に供給され、配管２１ａを経由して混練槽内に注液される。 FIG. 7 shows the state during injection. The air cylinder 23 operates simultaneously with the driving of the supply pump 40, and the piston 22 moves to the air cylinder side. Accordingly, the valve portion 22b moves away from the end portion on the wall surface 11 side of the pipe 21a and moves into the cylinder 21, so that the liquid flow path is released and the liquid can be circulated. The liquid 51 in the supply tank 50 is supplied to the cylinder 21 by the supply pump 40 and injected into the kneading tank via the pipe 21a.

所定量の注液が完了すると、エアシリンダ２３が動作してピストン２２が、混練槽１側に移動して、挿入部２２ａが配管２１ａに挿入され、これに伴い弁部２２ｂが配管２１ａの端部に押し付けられて、混練材料１２の配管２１ａへの進入を防ぐと伴に液体流路が遮断される。これと同時に供給ポンプ４０が停止する。これにより、再び供給タンク５０と混練槽１とを結ぶ配管経路は完全に遮断される。 When a predetermined amount of liquid injection is completed, the air cylinder 23 is operated, the piston 22 moves to the kneading tank 1 side, the insertion part 22a is inserted into the pipe 21a, and accordingly the valve part 22b is connected to the end of the pipe 21a. When pressed against the part to prevent the kneaded material 12 from entering the pipe 21a, the liquid flow path is blocked. At the same time, the supply pump 40 stops. Thereby, the piping path connecting the supply tank 50 and the kneading tank 1 again is completely blocked.

各個所の動作タイミングが順次正常に行われると注液は問題なく行なわれるはずであるが、実際の使用に当っては、供給ポンプ４０の慣性駆動、エアシリンダ２３の駆動抵抗や経年劣化による動作遅れなどが必ず発生し、各装置の動作タイミングは微妙にずれ必ずしも安定しない。 When the operation timing of each part is normally performed in succession, the liquid injection should be performed without any problem. However, in actual use, the operation is driven by the inertial drive of the supply pump 40, the drive resistance of the air cylinder 23, or aging deterioration. A delay or the like always occurs, and the operation timing of each device is slightly shifted and not necessarily stable.

例えば、注液状態から注液停止になる時に、供給ポンプが停止すると同時にピストン２２が混練槽側に移動して、弁部２２ｂが配管２１ａの端部に押し付けられて、液体の流通が遮断されるタイミングが少し遅れると、図８に示すように、混練材料１２が逆流する場合がある。このように混練成分がシリンダ２１の内部に逆流すると、挿入部２２ａを配管２１ａに押し込んだとしても、弁部２２ｂとシリンダ２１のテーパー部２１ｂとの間に混練材料１２が挟まって、図９に示す状態となり弁部２２ｂを２１ｂに押し付けて、流路を完全に遮断することができなくり閉鎖機能が不完全となる。 For example, when the liquid injection is stopped from the liquid injection state, the piston 22 moves to the kneading tank side at the same time as the supply pump stops, and the valve portion 22b is pressed against the end of the pipe 21a, thereby interrupting the liquid flow. If the timing is slightly delayed, the kneaded material 12 may flow backward as shown in FIG. When the kneading component flows backward into the cylinder 21 in this way, even if the insertion portion 22a is pushed into the pipe 21a, the kneading material 12 is sandwiched between the valve portion 22b and the tapered portion 21b of the cylinder 21, and FIG. The valve portion 22b is pressed against 21b and the flow path cannot be completely blocked, and the closing function becomes incomplete.

注液停止状態から注液状態にピストンバルブ２２が開作動する時に、液体の流れに遅れが発生して、シリンダ２１内の液圧が混練槽より低くなった場合においても、シリンダ２１の配管２１ａの流路が開放された瞬間に混練物１２が逆流して図８に示すようになり、シリンダ２１内部に付着することがある。この場合もピストンバルブ２０の閉作動時には図９に示す状態となり、弁部２２ｂを配管２１ａの端部に押し付けて、流路を完全に遮断することができなくなり閉鎖機能が不完全となる。 Even when the piston valve 22 is opened from the liquid injection stop state to the liquid injection state, a delay occurs in the flow of the liquid, and even when the liquid pressure in the cylinder 21 becomes lower than that of the kneading tank, the piping 21a of the cylinder 21 The kneaded material 12 flows backward as shown in FIG. 8 at the moment when the flow path is opened, and may adhere to the inside of the cylinder 21. Also in this case, when the piston valve 20 is closed, the state shown in FIG. 9 is obtained, and the valve portion 22b is pressed against the end portion of the pipe 21a, so that the flow path cannot be completely blocked and the closing function becomes incomplete.

ピストン２２の先端側２２ａは、配管２１ａに抜き差しすることから配管２１ａの内径よりわずかに小さい外径に加工されているため、この抜差し部分で完全に流路の遮断はできない。一旦、上記の逆流による付着が発生すると、その後は、流路の遮断が不完全になり、混練成分１２の逆流がますます増加する、もしくは供給ポンプ４０の停止指令後も慣性で駆動された場合、余分な注液が行われ、注液精度が安定しなくなる。 Since the distal end side 22a of the piston 22 is inserted into and removed from the pipe 21a, it is processed to have an outer diameter slightly smaller than the inner diameter of the pipe 21a. Once adhesion due to the above-described reverse flow occurs, the flow path is incompletely interrupted, and the back flow of the kneading component 12 increases further or is driven by inertia even after the stop command of the supply pump 40 is commanded. Excess liquid injection is performed, and the liquid injection accuracy becomes unstable.

液体供給装置によって注液される液体５１が付着性の強い樹脂液や粉体を含むスラリー液の場合には混練材料１２の逆流が発生しなくとも、ピストンバルブ２０の内部、特に弁部２２ｂとシリンダ２１のテーパー部２１ｂの間に凝集物が付着して、同様に図９に示す状態となり、流路を完全に遮断することが出来なくなり閉鎖機能が不完全となる。
一度、ピストンバルブ２０内で逆流、凝集物による付着が発生した場合、シリンダ２１を分解して内部清掃を行い、付着物を排除しなければならず、多大な工数が必要となる。 In the case where the liquid 51 injected by the liquid supply device is a slurry liquid containing a resin liquid or a powder having strong adhesion, the inside of the piston valve 20, particularly the valve portion 22 b, even if the kneaded material 12 does not flow backward. Aggregate adheres between the tapered portions 21b of the cylinder 21 and similarly enters the state shown in FIG. 9, so that the flow path cannot be completely blocked and the closing function is incomplete.
Once the back flow and adhesion due to aggregates occur in the piston valve 20, the cylinder 21 must be disassembled and the internal cleaning must be performed to remove the deposits, which requires a great number of man-hours.

本発明の液体供給装置では、ピストンバルブ２０と供給ポンプ４０とを結ぶ配管経路の間に開閉バルブ３０を配置し、液体の注液圧力を適正に制御しているため、前述の問題は発生しない。また、仮にピストンバルブ２０内で混練材料１２の逆流、付着や注液材料５１の付着が生じた場合でも、注液の制御は別設置のバルブ３０で確実に行われるため、液体供給装置の給液制御も問題なく行われる。
In the liquid supply apparatus of the present invention, the opening / closing valve 30 is arranged between the piping paths connecting the piston valve 20 and the supply pump 40, and the liquid injection pressure is appropriately controlled, so the above-mentioned problem does not occur. . In addition, even if the kneaded material 12 flows backward or adheres to the piston valve 20 or the liquid injection material 51 adheres to the piston valve 20, the liquid injection is reliably controlled by the separate valve 30. Liquid control is also performed without problems.

本発明によれば、加圧容器に、液体を安定して確実に供給することができる。
According to the present invention, a liquid can be stably and reliably supplied to a pressurized container.

１ 混練槽
２ ブレード
３ 回転軸
４ 加圧蓋
５ 注液孔
９ 従来の加圧型混練装置
１０ 本発明の液体供給装置を適用した一例の加圧型混練装置
１１ 混練槽の壁面
１２ 混練材料
２０ ピストンバルブ
２１ シリンダ
２１ａ 配管
２１ｂ テーパー部
２２ ピストン
２２ａ 挿入部
２２ｂ 弁部
２３ エアシリンダ
３０ 開閉バルブ
４０ 供給ポンプ
４１、４２ 圧力計
４３ 流量計
５０ 供給タンク
５１ 液体


DESCRIPTION OF SYMBOLS 1 Kneading tank 2 Blade 3 Rotating shaft 4 Pressurization lid 5 Injection hole 9 Conventional pressurization type kneading apparatus 10 Example of pressurization type kneading apparatus 11 to which the liquid supply apparatus of the present invention is applied Kneading tank wall surface 12 Kneading material 20 Piston valve 21 Cylinder 21a Piping 21b Taper part 22 Piston 22a Insertion part 22b Valve part 23 Air cylinder 30 Open / close valve 40 Supply pump 41, 42 Pressure gauge 43 Flow meter 50 Supply tank 51 Liquid

Claims (3)

タンクから供給ポンプを介して加圧容器に注液する液体供給装置であって、
前記加圧容器に接した注液流路にピストン形状の弁構造体を抜き差しして、流路の開閉を制御する第１の流路開閉手段であるピストンバルブが配置され、
前記ピストンバルブは供給液体が溜まるシリンダ、注液を制御するピストン、前記ピストンを駆動するエアシリンダを含み
前記ピストンは弁部テーパー面部分を有し、
前記シリンダは、前記ピストンの移動により前記弁部テーパー面部分が押しつけられるテーパー部を有し、
前記供給ポンプと前記ピストンバルブとの間にさらに別の弁構造を有する第２の流路開閉手段が配置されていることを特徴とする液体供給装置。 A liquid supply device for injecting liquid from a tank to a pressurized container via a supply pump,
A piston valve, which is a first channel opening / closing means for controlling the opening and closing of the channel, is arranged by inserting and removing a piston-shaped valve structure into and from the liquid injection channel in contact with the pressurized container,
The piston valve includes a cylinder for storing a supply liquid, a piston for controlling liquid injection, and an air cylinder for driving the piston.
The piston has a valve portion tapered surface portion;
The cylinder has a tapered portion against which the valve portion tapered surface portion is pressed by the movement of the piston,
A liquid supply apparatus, wherein a second flow path opening / closing means having another valve structure is arranged between the supply pump and the piston valve. 請求項1に示される液体供給装置を使用して加圧容器に注液する液体供給方法であって、
第1の流路開閉手段が開状態の場合は、必ず第１の流路開閉手段と第２の流路開閉手段との間の液圧力が加圧容器内から供給装置側へ逆流する液圧力より高くなるように供給ポンプの運転／停止、両開閉装置の開／閉タイミングおよび開度を制御することを特徴とする液体供給方法。 A liquid supply method for injecting liquid into a pressurized container using the liquid supply apparatus shown in claim 1,
When the first flow path opening / closing means is in the open state, the liquid pressure between the first flow path opening / closing means and the second flow path opening / closing means always flows back from the inside of the pressurized container to the supply device side. A liquid supply method characterized by controlling the operation / stop of the supply pump and the opening / closing timing and opening degree of both opening / closing devices so as to be higher. 請求項1に記載の液体供給装置であって、前記第１の流路開閉装置と前記第２の流路開閉装置とを結ぶ配管長と配管内径との関係を（配管長／配管内径）＜２００とすることを特徴とする液体供給装置。 2. The liquid supply apparatus according to claim 1, wherein a relationship between a pipe length connecting the first flow path opening / closing apparatus and the second flow path opening / closing apparatus and a pipe inner diameter is (pipe length / pipe inner diameter) < 200. A liquid supply apparatus characterized by being 200.

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