JP6284707B2 - In-situ foaming method for polyurethane foam and on-site foaming device for polyurethane foam - Google Patents

In-situ foaming method for polyurethane foam and on-site foaming device for polyurethane foam Download PDF

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JP6284707B2
JP6284707B2 JP2013046239A JP2013046239A JP6284707B2 JP 6284707 B2 JP6284707 B2 JP 6284707B2 JP 2013046239 A JP2013046239 A JP 2013046239A JP 2013046239 A JP2013046239 A JP 2013046239A JP 6284707 B2 JP6284707 B2 JP 6284707B2
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JP2014172984A (en
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森　義雄
義雄 森
健 古▲橋▼
健 古▲橋▼
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イノアック特材株式会社
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本発明は、作業現場に発泡装置をトラック等で運搬して傾斜地等の軽量盛土や橋桁の補強あるいは空洞の充填などのために現場でポリウレタン発泡体を発泡させる現場発泡方法とそれに用いる現場発泡装置に関する。   The present invention relates to an in-situ foaming method in which a polyurethane foam is foamed on site for transporting a foaming device to a work site by a truck or the like to reinforce a lightweight embankment such as an inclined land, a bridge girder, or filling a cavity, and an on-site foaming device used therefor About.

例えば傾斜地における道路の拡幅や平地の土手等の形成において採用されている軽量盛土や、鉄橋の橋桁の補強あるいは空洞の充填のために、ポリウレタン発泡体を目的の箇所に吐出して発泡させることが行われている。その際、ポリウレタン発泡体の現場発泡装置をトラックに乗せて現場へ搬送して施工作業が行われる。   For example, polyurethane foam can be discharged and foamed to the target location for lighter embankment used in the formation of road widening and banking on flat land on sloped terrain, reinforcement of steel bridge girder or filling of cavities. Has been done. At that time, an on-site foaming device for polyurethane foam is placed on a truck and transported to the site for construction work.

ポリウレタン発泡体の現場発泡装置は、ポリオール成分が収容された原料ドラムから供給されるポリオール成分を一旦貯留して加熱するポリオール成分用温調タンクと、イソシアネート成分が収容された原料ドラムから供給されるイソシアネート成分を一旦貯留して加熱するイソシアネート成分用温調タンクと、前記各温調タンクから供給されるそれぞれの成分を混合して吐出する混合吐出部とを備えている。現場発泡装置においては、混合吐出部で行うポリオール成分とイソシアネート成分の混合に際して混合比率が狂ったり、混合が不均一になったりすると、混合吐出部から吐出した混合原料が発泡しなかったり、発泡後のポリウレタン発泡体の物性が劣ったりするようになり、さらに混合させるポリオール成分とイソシアネートの温度が設定温度よりも低くなると発泡時間が長くなって施工作業効率が悪くなる問題が発生するため、原料ドラムと混合吐出部との間に設けた温調タンクによって、ポリオール成分とイソシアネート成分を加熱して各成分の温度及び粘度が一定になるようにしている。 The polyurethane foam in-situ foaming apparatus is supplied from a polyol component temperature control tank for temporarily storing and heating a polyol component supplied from a raw material drum containing a polyol component, and a raw material drum containing an isocyanate component. An isocyanate component temperature control tank that temporarily stores and heats the isocyanate component and a mixing / discharging unit that mixes and discharges each component supplied from each of the temperature control tanks. In the in-situ foaming device, if the mixing ratio goes wrong during mixing of the polyol component and isocyanate component in the mixing discharge part, or the mixing becomes uneven, the mixed raw material discharged from the mixing discharge part does not foam, or after foaming Since the properties of the polyurethane foam of this material are inferior, and the temperature of the polyol component and isocyanate to be mixed becomes lower than the set temperature, the foaming time becomes longer and the construction work efficiency becomes worse. The temperature and the viscosity of each component are made constant by heating the polyol component and the isocyanate component by a temperature control tank provided between the mixing and discharging unit.

しかしながら、従来における温調タンクの加熱は、温調タンクの外周にバンドヒーターを巻き付けたり、加熱ジャケットを設けたりするなど、タンクの外周に加熱装置を装着するものであるため、装置が嵩張り、大きさに制限がある搬送用トラックにおいて、他に混載したい積み荷に制約を受けるようになり、現場発泡装置の軽量化及び小型化が求められている。さらに、外気温が低い冬季においては原料ドラムから温調タンクに供給される温度の低いポリオール成分及びイソシアネート成分によって温調タンク内のポリオール成分及びイソシアネートに温度ムラを生じやすく、混合吐出部で行うポリオール成分とイソシアネート成分との混合に際して混合比率が狂ったり、混合が不均一になったりし易い問題がある。また、温調に対する熱効率を向上させ、経済性を高めることも求められている。   However, in the conventional heating of the temperature control tank, a heating device is mounted on the outer periphery of the tank, such as wrapping a band heater around the outer periphery of the temperature control tank or providing a heating jacket. In a transportation truck having a limited size, there is a restriction on other loads to be mixed, and there is a demand for weight reduction and miniaturization of an on-site foaming apparatus. Furthermore, in winter when the outside air temperature is low, the polyol component and isocyanate component that are supplied from the raw material drum to the temperature control tank are likely to cause temperature unevenness in the polyol component and isocyanate in the temperature control tank, and the polyol that is performed in the mixing and discharging unit There is a problem that the mixing ratio is likely to be out of order when mixing the component and the isocyanate component, or the mixing is likely to be uneven. In addition, there is a demand for improving the thermal efficiency for temperature control and improving the economic efficiency.

特開２０００−１４１３６７号公報JP 2000-141367 A

本発明は前記の点に鑑みなされたものであって、ポリオール成分及びイソシアネート成分の温度ムラを抑制すると共に粘度を一定にし、発泡及び物性が良好なポリウレタン発泡体を得ることができ、さらに装置の小型化及び軽量化を向上させ、かつ加熱効率を高め、経済性を高めることができるポリウレタン発泡体の現場発泡方法とポリウレタン発泡体の現場発泡装置の提供を目的とする。   The present invention has been made in view of the above points, and can suppress the temperature unevenness of the polyol component and the isocyanate component, make the viscosity constant, and obtain a polyurethane foam having good foaming and physical properties. An object of the present invention is to provide a polyurethane foam in-situ foaming method and a polyurethane foam in-situ foaming apparatus capable of improving the miniaturization and weight reduction, increasing the heating efficiency, and improving the economic efficiency.

請求項１の発明は、ポリオール成分が収容された原料ドラムから、ポリオール成分をポリオール成分用温調タンクの成分貯留部へ供給して一旦貯留し、加熱したポリオール成分を混合吐出部へ供給すると共に、イソシアネート成分が収容された原料ドラムからイソシアネート成分をイソシアネート成分用温調タンクの成分貯留部へ供給して一旦貯留し、加熱したイソシアネート成分を前記混合吐出部へ供給し、前記混合吐出部でポリオール成分とイソシアネート成分を混合して吐出し、発泡させるポリウレタン発泡体の現場発泡方法において、それぞれの前記温調タンクの下部から前記成分貯留部内の成分を排出して別々の一次加熱装置で加熱した後、それぞれの成分の前記温調タンク外から該温調タンク内の成分貯留部を経てそれぞれの温調タンク外に至るように設けられた二次加熱用配管に供給し、前記各二次加熱用配管の出口から排出した成分を前記混合吐出部に供給するようにし、それぞれの前記温調タンク内の前記成分貯留部における前記二次加熱用配管を前記成分が流れる際に、前記二次加熱用配管に設けた二次加熱装置によって前記二次加熱用配管内の前記成分を加熱すると共に、前記温調タンクの成分貯留部に貯留されている前記成分を、前記二次加熱用配管内を流れる前記成分の熱によって加熱し、加熱された前記貯留部の前記成分を前記温調タンクの下部から排出して前記一次加熱装置で加熱した後、前記温調タンクの成分貯留部を通る前記二次加熱用配管に流れるようにしたことを特徴とする。
請求項２の発明は、請求項１において、前記各二次加熱用配管の出口は、安全バルブ、圧力センサ、流量計を経て前記混合吐出部に接続され、各成分の圧力が前記圧力センサで設定圧力超過となった際に、前記安全バルブを通じてそれぞれの前記温調タンクへ成分を戻す配管が設けられていることを特徴とする。 According to the first aspect of the present invention, the polyol component is supplied from the raw material drum containing the polyol component to the component storage portion of the temperature control tank for the polyol component, temporarily stored, and the heated polyol component is supplied to the mixing and discharging portion. The isocyanate component is supplied from the raw material drum containing the isocyanate component to the component storage portion of the temperature control tank for the isocyanate component, temporarily stored, the heated isocyanate component is supplied to the mixing discharge portion, and the polyol is discharged from the mixing discharge portion. In the in-situ foaming method of polyurethane foam for mixing and discharging the component and the isocyanate component to foam, after discharging the component in the component storage part from the lower part of each temperature control tank and heating with a separate primary heating device The temperature of each component passes from the outside of the temperature control tank through the component storage section in the temperature control tank. Supply to the secondary heating pipes provided outside the tank, supply the components discharged from the outlet of each secondary heating pipe to the mixing discharge section, When the component flows through the secondary heating pipe in the component reservoir, the component in the secondary heating pipe is heated by a secondary heating device provided in the secondary heating pipe, and the temperature is increased. The component stored in the component storage part of the conditioning tank is heated by the heat of the component flowing in the secondary heating pipe, and the heated component of the storage part is discharged from the lower part of the temperature control tank And after heating with the said primary heating apparatus, it was made to flow into the said piping for secondary heating which passes the component storage part of the said temperature control tank, It is characterized by the above-mentioned.
According to a second aspect of the present invention, in the first aspect, the outlet of each secondary heating pipe is connected to the mixed discharge portion via a safety valve, a pressure sensor, and a flow meter, and the pressure of each component is the pressure sensor. When a set pressure is exceeded, a pipe for returning a component to each temperature control tank through the safety valve is provided.

請求項３の発明は、ポリオール成分が収容された原料ドラムから供給されるポリオール成分を一旦貯留して加熱するポリオール成分用温調タンクと、イソシアネート成分が収容された原料ドラムから供給されるイソシアネート成分を一旦貯留して加熱するイソシアネート成分用温調タンクと、前記各温調タンクから供給されるそれぞれの成分を混合して吐出する混合吐出部とを備えるポリウレタン発泡体の現場発泡装置において、それぞれの前記温調タンクは、上部に流入口を備えると共に下部に排出口を備え、内部に前記流入口から供給された成分が一旦貯留する成分貯留部を備え、それぞれの前記温調タンクの排出口には、該排出口から排出された成分を加熱する一次加熱装置がそれぞれ接続され、前記一次加熱装置で加熱された成分を該成分の前記温調タンク外から該温調タンク内の成分貯留部を経て該温調タンク外に流す二次加熱用配管が、それぞれの前記温調タンクに対して設けられ、それぞれの前記二次加熱用配管には該二次加熱用配管を流れる成分を加熱する二次加熱装置が設けられ、それぞれの前記二次加熱用配管の出口から排出された成分を前記混合吐出部に供給する流路が設けられ、それぞれの前記温調タンク内の前記成分貯留部における前記二次加熱用配管を前記成分が流れる際に、前記二次加熱用配管に設けた二次加熱装置によって前記二次加熱用配管内の前記成分を加熱すると共に、前記温調タンクの成分貯留部に貯留されている前記成分を、前記二次加熱用配管内を流れる前記成分の熱によって加熱し、加熱された前記成分貯留部の前記成分を前記温調タンクの下部の前記排出口から排出して前記一次加熱装置で加熱した後、前記温調タンクの成分貯留部を通る前記二次加熱用配管に流れるようにしたことを特徴とする。
請求項４の発明は、請求項３において前記各二次加熱用配管の出口は、安全バルブ、圧力センサ、流量計を経て前記混合吐出部に接続され、各成分の圧力が前記圧力センサで設定圧力超過となった際に、前記安全バルブを通じてそれぞれの前記温調タンクへ成分を戻す配管が設けられていることを特徴とする。 According to a third aspect of the present invention, there is provided a polyol component temperature control tank for temporarily storing and heating a polyol component supplied from a raw material drum containing a polyol component, and an isocyanate component supplied from a raw material drum containing an isocyanate component. In a polyurethane foam in-situ foaming apparatus comprising a temperature control tank for an isocyanate component that temporarily stores and heats, and a mixing discharge unit that mixes and discharges each component supplied from each temperature control tank, The temperature control tank includes an inlet at the top and a discharge port at the bottom, and includes a component storage unit that temporarily stores the components supplied from the inlet, and is provided at the discharge port of each temperature control tank. Is connected to a primary heating device for heating the component discharged from the outlet, and the component heated by the primary heating device is Secondary heating pipes that flow out of the temperature control tank from outside the temperature control tank through the component storage section in the temperature control tank are provided for each of the temperature control tanks. The heating pipe is provided with a secondary heating device for heating the component flowing through the secondary heating pipe, and the flow path for supplying the component discharged from the outlet of each secondary heating pipe to the mixing and discharging unit When the component flows through the secondary heating pipe in the component storage section in each temperature control tank, the secondary heating device provided in the secondary heating pipe is used for the secondary heating. While heating the said component in piping, the said component currently stored by the component storage part of the said temperature control tank is heated with the heat of the said component which flows through the inside of said secondary heating piping, and the said component storage heated Part of the ingredients After heating at the said primary heating device is discharged from the outlet at the bottom of the tank, characterized in that the flow to the secondary heating pipe passing through the component reservoir of the temperature control tank.
According to a fourth aspect of the present invention, in the third aspect, the outlet of each secondary heating pipe is connected to the mixed discharge section via a safety valve, a pressure sensor, and a flow meter, and the pressure of each component is set by the pressure sensor. A pipe is provided for returning the component to each of the temperature control tanks through the safety valve when the pressure is exceeded.

請求項５の発明は、請求項３または４において、前記二次加熱用配管は、電熱線からなる前記二次加熱装置が収容され、前記二次加熱装置の外側を前記成分が流れることを特徴とする。 The invention of claim 5 is characterized in that, in claim 3 or 4 , the secondary heating pipe accommodates the secondary heating device comprising a heating wire, and the component flows outside the secondary heating device. And

請求項６の発明は、請求項３から５の何れか一項において、前記二次加熱用配管は、前記成分貯留部の複数箇所を通るように設けられていることを特徴とする。 A sixth aspect of the present invention is characterized in that, in any one of the third to fifth aspects, the secondary heating pipe is provided so as to pass through a plurality of locations of the component reservoir.

請求項１乃至４の発明によれば、温調タンクの下部から排出されて一次加熱装置で加熱された成分を、温調タンク内の成分貯留部を通る二次加熱用配管に流し、その際に二次加熱用配管に設けた二次加熱装置によって加熱すると共に、温調タンクの成分貯留部に貯留されている成分を、前記二次加熱用配管内を流れる成分の熱によって加熱し、加熱された成分貯留部の成分を温調タンクの下部から排出して前記一次加熱装置で加熱し、一方、前記二次加熱用配管を流れる際に加熱した成分は、前記混合吐出部へ供給するようにしたため、ポリオール成分とイソシアネート成分を効率よく加熱することができ、各成分の温度ムラを抑制すると共に粘度を一定にし、発泡及び物性が良好なポリウレタン発泡体を得ることができると共に、経済性を高めることができる。さらに温調タンク内に二次加熱装置を設けたことにより、温調タンクの外周に二次加熱装置を設ける必要が無いため、装置の小型化及び軽量化を向上させることができ、かつ加熱効率を高め、経済性を高めることができる。 According to invention of Claims 1 thru | or 4 , the component discharged | emitted from the lower part of the temperature control tank and heated with the primary heating apparatus is poured into the piping for secondary heating which passes the component storage part in a temperature control tank, In addition to heating by the secondary heating device provided in the secondary heating pipe, the component stored in the component storage section of the temperature control tank is heated by the heat of the component flowing in the secondary heating pipe, The component stored in the component storage unit is discharged from the lower part of the temperature control tank and heated by the primary heating device, while the component heated when flowing through the secondary heating pipe is supplied to the mixing and discharging unit. Therefore, the polyol component and the isocyanate component can be efficiently heated, the temperature unevenness of each component is suppressed and the viscosity is made constant, and a polyurethane foam having good foaming and physical properties can be obtained, and the economical efficiency is improved. It is Mel possible. Furthermore, since the secondary heating device is provided in the temperature control tank, it is not necessary to provide a secondary heating device on the outer periphery of the temperature control tank, so that the size and weight of the device can be improved and the heating efficiency can be improved. Can be improved and the economy can be improved.

請求項５の発明によれば、一次加熱装置で加熱された成分は、温調タンクの成分貯留部内の二次加熱用配管を流れる際に、二次加熱用配管に収容されている二次加熱装置の外側を流れるため、効率よく二次加熱装置で加熱されると共に、温調タンクの成分貯留部の成分を、二次加熱用配管を流れる成分の熱によって効率よく加熱することができる。 According to the invention of claim 5 , when the component heated by the primary heating device flows through the secondary heating pipe in the component storage section of the temperature control tank, the secondary heating accommodated in the secondary heating pipe. Since it flows outside the device, it can be efficiently heated by the secondary heating device, and the components in the component storage section of the temperature control tank can be efficiently heated by the heat of the components flowing through the secondary heating pipe.

請求項６の発明によれば、二次加熱用配管が温調タンクの成分貯留部の複数箇所を通るように設けられているため、二次加熱用配管内を通る成分の熱によって成分貯留部の成分を、よりムラ無く効率よく加熱することができる。 According to the invention of claim 6 , since the secondary heating pipe is provided so as to pass through a plurality of locations of the component storage part of the temperature control tank, the component storage part is generated by the heat of the component passing through the secondary heating pipe. This component can be efficiently heated more uniformly.

本発明の一実施形態における現場発泡装置の構成を概略的に示す図である。It is a figure which shows roughly the structure of the on-site foaming apparatus in one Embodiment of this invention. 二次加熱用配管の斜視図である。It is a perspective view of piping for secondary heating. 図２の３Ｅ−３Ｅ断面及び３Ｆ−３Ｆ断面図である。It is 3E-3E cross section and 3F-3F cross section figure of FIG.

以下、本発明の一実施形態について説明する。図１に示す現場発泡装置１０は、山間部における拡幅工事や軟弱地盤の盛土工事等の際に硬質のポリウレタン発泡体を地盤等の上に発泡形成するため、トラック等で現場に搬送されて使用されるものである。
前記現場発泡装置１０は、ポリオール成分が収容された原料ドラム２１Ａからポリオール成分用温調タンク２７Ａを経て混合吐出部４９へ至るポリオール成分側の流路と、イソシアネート成分が収容された原料ドラム２１Ｂからイソシアネート成分用温調タンク２７Ｂを経て混合吐出部４９へ至るイソシアネート成分側の流路とで構成されている。 Hereinafter, an embodiment of the present invention will be described. The in-situ foaming device 10 shown in FIG. 1 is used by being transported to the site by a truck or the like in order to form a hard polyurethane foam on the ground or the like during widening work in a mountainous area or embankment work on soft ground. It is what is done.
The in-situ foaming apparatus 10 includes a flow path on the polyol component side from the raw material drum 21A containing the polyol component to the mixing and discharging unit 49 via the polyol component temperature control tank 27A, and the raw material drum 21B containing the isocyanate component. It is comprised with the flow path by the side of the isocyanate component which reaches the mixing discharge part 49 via the temperature control tank 27B for isocyanate components.

ポリオール成分は、ポリエーテルポリオール、ポリエステルポリオールの双方あるは何れか一方からなるポリオールと、触媒、発泡剤等からなる。一方、イソシアネート成分は、ＴＤＩプレポリマー、クルードＴＤＩ、ポリメリックＭＤＩ、各種変性ＭＤＩ等からなる。   The polyol component comprises a polyol composed of either or both of a polyether polyol and a polyester polyol, a catalyst, a foaming agent, and the like. On the other hand, the isocyanate component is composed of TDI prepolymer, crude TDI, polymeric MDI, various modified MDI, and the like.

前記原料ドラム２１Ａ、２１Ｂから前記温調タンク２７Ａ、２７Ｂに至る配管６０Ａ、６０Ｂには、ドラムポンプ２３Ａ、２３Ｂが接続されている。前記ドラムポンプ２３Ａ、２３Ｂは、前記原料ドラム２１Ａ、２１Ａに収容されている成分を汲み上げて温調タンク２７Ａ、２７Ｂへ圧送するポンプである。   Drum pumps 23A and 23B are connected to pipes 60A and 60B extending from the material drums 21A and 21B to the temperature control tanks 27A and 27B. The drum pumps 23A and 23B are pumps that pump up components contained in the raw material drums 21A and 21A and pump them to the temperature control tanks 27A and 27B.

前記温調タンク２７Ａ、２７Ｂは、上部に流入口２７１Ａ、２７１Ｂ、下部に排出口２７２Ａ、２７２Ｂを備え、内部の底面から所定高さまでの部分が成分貯留部２７３Ａ、２７３Ｂとなっている。   The temperature control tanks 27A and 27B are provided with inflow ports 271A and 271B in the upper portion and discharge ports 272A and 272B in the lower portion, and portions from the inner bottom surface to a predetermined height are component storage portions 273A and 273B.

前記温調タンク２７Ａ、２７Ｂの排出口２７２Ａ、２７２Ｂは、配管６１Ａ、６１Ｂによってストレーナ２５Ａ、２５Ｂに接続されている。前記ストレーナ２５Ａ、２５Ｂは、ポリオール成分及びイソシアネート成分に混入している不純物を濾過するための濾過装置である。前記ストレーナ２５Ａ、２５Ｂは配管６２Ａ、６２Ｂによって温調タンク２７Ａ、２７Ｂ外の一次加熱装置２９Ａ、２９Ｂに接続され、前記ストレーナ２５Ａ、２５Ｂを通ってきた成分が一次加熱装置２９Ａ、２９Ｂによって加熱される。前記一次加熱装置２９Ａ、２９Ｂは、プライマリーヒータである。前記一次加熱装置２９Ａ、２９Ｂによって加熱された成分は、配管６３Ａ、６３Ｂによってポンプ３０Ａ、３０Ｂに至り、さらに配管６４Ａ、６４Ｂによって二次加熱用配管３１Ａ、３１Ｂに流れるように構成されている。前記ポンプ３０Ａ、３０Ｂは、前記成分貯留部２７３Ａ、２７３Ｂのポリオール成分及びイソシアネート成分を混合吐出部４９へ所定の比率で供給するためのものである。   The discharge ports 272A, 272B of the temperature control tanks 27A, 27B are connected to the strainers 25A, 25B by pipes 61A, 61B. The strainers 25A and 25B are filter devices for filtering impurities mixed in the polyol component and the isocyanate component. The strainers 25A and 25B are connected to primary heating devices 29A and 29B outside the temperature control tanks 27A and 27B by pipes 62A and 62B, and the components passing through the strainers 25A and 25B are heated by the primary heating devices 29A and 29B. . The primary heating devices 29A and 29B are primary heaters. The components heated by the primary heating devices 29A and 29B reach the pumps 30A and 30B through the pipes 63A and 63B, and further flow into the secondary heating pipes 31A and 31B through the pipes 64A and 64B. The pumps 30 </ b> A and 30 </ b> B are for supplying the polyol component and the isocyanate component of the component reservoirs 273 </ b> A and 273 </ b> B to the mixing and discharging unit 49 at a predetermined ratio.

前記二次加熱用配管３１Ａ、３１Ｂ、３７Ａ、３７Ｂは、前記温調タンク２７Ａ、２７Ｂの外部から前記成分貯留部２７２Ａ、２７２Ｂを通って、再び前記温調タンク２７Ａ、２７Ｂの外部へ至るように設けられている。図示の例の二次加熱用配管３１Ａ、３１Ｂ、３７Ａ、３７Ｂは、前記温調タンク２７Ａ、２７Ｂに、前記成分貯留部２７２Ａ、２７２Ｂの側面を貫通して設けられている。一方の前記第二温調用配管３１Ａ、３１Ｂは、前記成分貯留部２７２Ａ、２７２Ｂの下部側を貫通して設けられ、また他方の前記第二温調用配管３７Ａ、３７Ｂは、前記成分貯留部２７２Ａ、２７２Ｂの上部側を貫通して設けられ、図２に示すように、下部側の前記第二温調用配管３１Ａ、３１Ｂと上部側の前記第二温調用配管３７Ａ、３７Ｂが配管６６Ａ、６６Ｂにより直列に接続されている。   The secondary heating pipes 31A, 31B, 37A, and 37B pass from the outside of the temperature control tanks 27A and 27B through the component storage units 272A and 272B to reach the outside of the temperature control tanks 27A and 27B again. Is provided. The secondary heating pipes 31A, 31B, 37A, and 37B in the illustrated example are provided in the temperature control tanks 27A and 27B through the side surfaces of the component storage portions 272A and 272B. One of the second temperature adjustment pipes 31A, 31B is provided so as to penetrate the lower side of the component storage part 272A, 272B, and the other second temperature adjustment pipe 37A, 37B is provided with the component storage part 272A, As shown in FIG. 2, the second temperature control pipes 31A and 31B on the lower side and the second temperature control pipes 37A and 37B on the upper side are connected in series by the pipes 66A and 66B. It is connected to the.

前記第二温調用配管３１Ａ、３１Ｂ、３７Ａ、３７Ｂは、内部の中心に収容された電熱ヒータからなる二次加熱装置の外側を成分が流れるように構成されている。なお、前記第二温調用配管３１Ａ、３１Ｂ、３７Ａ、３７Ｂは、図３に示すように、前記温調タンク２７Ａ、２７Ｂに固定される外管３２Ａ、３２Ｂ、３８Ａ、３８Ｂと、前記外管３２Ａ、３２Ｂ、３８Ａ、３８Ｂ内に収容された流路管３５Ａ、３５Ｂ、４０Ａ、４０Ｂと、前記流路管３５Ａ、３５Ｂ、４０Ａ、４０Ｂ内に収容された二次加熱装置３３Ａ、３３Ｂ、３９Ａ、３９Ｂとで構成され、前記流路管３５Ａ、３５Ｂ、４０Ａ、４０Ｂ内における二次加熱装置３３Ａ、３３Ｂ、３９Ａ、３９Ｂの外側を成分が流れる構造のものに限られず、外管とその内部に収容された二次加熱装置とのみで構成され、外管内面と二次加熱装置の外周間の部分を成分が流れるものであってもよい。図示の例では、下部側の前記第二温調用配管３１Ａ、３１Ｂは、前記流路管３５Ａ、３５Ｂの一端が前記配管６４Ａ、６４Ｂによって前記ポンプ３０Ａ、３０Ｂと接続され、他端が上部側の前記第二温調用配管３７Ａ、３７Ｂの流路管４０Ａ、４０Ｂの一端と配管６６Ａ、６６Ｂによって接続されている。上部側の前記第二温調用配管３７Ａ、３７Ｂにおける流路管４０Ａ、４０Ｂの他端の出口は、前記温調タンク２７Ａ、２７Ｂの外部に通じ、下部側の前記第二温調用配管３１Ａ、３１Ｂの流路管３５Ａ、３５Ｂの一端から流入したポリオール成分またはイソシアネート成分が、上部側の前記第二温調用配管３７Ａ、３７Ｂの流路管を通って前記温調タンク２７Ａ、２７Ｂの外部に至るように構成されている。なお、前記第二温調用配管は、前記成分貯留部の上下２箇所に限られず、他の箇所に設けたり、３箇所以上に設けたりしても良い。   Said 2nd temperature control piping 31A, 31B, 37A, 37B is comprised so that a component may flow the outer side of the secondary heating apparatus which consists of an electric heater accommodated in the center of an inside. As shown in FIG. 3, the second temperature control pipes 31A, 31B, 37A, and 37B include outer tubes 32A, 32B, 38A, and 38B that are fixed to the temperature control tanks 27A and 27B, and the outer tube 32A. , 32B, 38A, 38B, flow path pipes 35A, 35B, 40A, 40B, and secondary flow apparatuses 33A, 33B, 39A, 39B housed in the flow path pipes 35A, 35B, 40A, 40B. And is not limited to a structure in which components flow outside the secondary heating devices 33A, 33B, 39A, and 39B in the flow channel tubes 35A, 35B, 40A, and 40B, and is accommodated in the outer tube and the inside thereof. It may be configured only with the secondary heating device, and the component may flow through a portion between the inner surface of the outer tube and the outer periphery of the secondary heating device. In the illustrated example, the second temperature control pipes 31A and 31B on the lower side are connected to the pumps 30A and 30B at one end of the flow pipes 35A and 35B by the pipes 64A and 64B, and the other end is connected to the upper side. The second temperature control pipes 37A and 37B are connected to one ends of the flow path pipes 40A and 40B by the pipes 66A and 66B. The outlets at the other ends of the flow pipes 40A and 40B in the second temperature control pipes 37A and 37B on the upper side lead to the outside of the temperature control tanks 27A and 27B, and the second temperature control pipes 31A and 31B on the lower side. The polyol component or isocyanate component flowing in from one end of the flow pipes 35A and 35B passes through the flow pipes of the second temperature control pipes 37A and 37B on the upper side and reaches the outside of the temperature control tanks 27A and 27B. It is configured. In addition, said 2nd temperature control piping is not restricted to the upper and lower two places of the said component storage part, You may provide in another place, or may provide in three or more places.

上部側の前記第二温調用配管３７Ａ、３７Ｂにおいて、前記温調タンク２７Ａ、２７Ｂの外部に通じる出口、すなわち前記流路管４０Ａ、４０Ｂの他端の出口は、配管６７Ａ、６７Ｂによって安全バルブ４３Ａ、４３Ｂ、圧力センサ４５Ａ、４５Ｂ、流量計４７Ａ、４７Ｂに順に接続されている。また、前記安全バルブ４３Ａ、４３Ｂには、前記圧力センサ４５Ａ、４５Ｂで成分が設定圧力超過となった際に、前記安全バルブ４３Ａ、４３Ｂを通じてそれぞれの前記温調タンク２７Ａ、２７Ｂへ成分を戻すための配管６８Ａ、６８Ｂが、前記温調タンク２７Ａ、２７Ｂに接続されている。前記流量計４７Ａ、４７Ｂの出口側には加熱ホース７０Ａ、７０Ｂが接続され、該加熱ホース７０Ａ、７０Ｂの先端に混合吐出部４９が設けられている。前記加熱ホース７０Ａ、７０Ｂは、外周に電熱ヒータ等が埋設された公知のもので構成される。また前記混合吐出部４９は、原料混合機能を備える公知の吐出ガンで構成される。   In the second temperature control pipes 37A and 37B on the upper side, the outlets that lead to the outside of the temperature control tanks 27A and 27B, that is, the outlets at the other ends of the flow path pipes 40A and 40B are connected to the safety valve 43A by the pipes 67A and 67B. , 43B, pressure sensors 45A, 45B, and flow meters 47A, 47B are sequentially connected. The safety valves 43A and 43B return the components to the temperature control tanks 27A and 27B through the safety valves 43A and 43B when the pressure sensor 45A and 45B exceeds the set pressure. The pipes 68A and 68B are connected to the temperature control tanks 27A and 27B. Heating hoses 70A and 70B are connected to the outlet sides of the flow meters 47A and 47B, and a mixing discharge part 49 is provided at the tip of the heating hoses 70A and 70B. The heating hoses 70A and 70B are constructed of a known one having an electric heater or the like embedded in the outer periphery. The mixing and discharging unit 49 is configured by a known discharging gun having a raw material mixing function.

前記現場発泡装置１０は、トラックの荷台等に積載されて施工現場へ搬送され、ポリウレタン発泡体の現場発泡に使用される。前記現場発泡装置１０を用いるポリウレタン発泡体の現場発泡方法では、ポリオール成分が収容された前記原料ドラム２１Ａとイソシアネート成分が収容された前記原料ドラム２１Ｂから、ポリオール成分とイソシアネート成分を前記温調タンク２７Ａ、２７Ｂの成分貯留部２７３Ａ、２７３Ｂにそれぞれ供給し、一旦貯留する。前記温調タンク２７Ａ、２７Ｂの成分貯留部２７３Ａ、２７３Ｂでは、前記原料ドラム２１Ａ、２１Ｂから供給されたポリオール成分とイソシアネート成分を、前記成分貯留部２７３Ａ、２７３Ｂ内を通っている前記二次加熱用配管３１Ａ、３７Ａ、３１Ｂ、３７Ｂと接触させ、前記二次加熱用配管３１Ａ、３７Ａ、３１Ｂ、３７Ｂ内を流れるポリオール成分とイソシアネート成分の熱により加熱する。加熱した前記成分貯留部２７３Ａ、２７３Ｂ内のポリオール成分とイソシアネート成分を、前記温調タンク２７Ａ、２７Ｂの排出口２７２Ａ、２７２Ｂから一次加熱装置２９Ａ、２９Ｂへ供給し、前記一次加熱装置２９Ａ、２９Ｂで加熱した後、前記温調タンク２７Ａ、２７Ｂの成分貯留部２７３Ａ、２７３Ｂ内を通る前記二次加熱用配管３１Ａ、３７Ａ、３１Ｂ、３７Ｂへ流し、前記二次加熱用配管３１Ａ、３７Ａ、３１Ｂ、３７Ｂに設けた前記二次加熱装置３３Ａ、３３Ｂ、３９Ａ、３９Ｂで加熱し、その後にポリオール成分とイソシアネート成分を前記混合吐出部４９へ供給し、混合して吐出することにより、ポリウレタン発泡体を発泡させる。 The in-situ foaming apparatus 10 is loaded on a truck bed or the like, conveyed to a construction site, and used for in-situ foaming of polyurethane foam. In the in-situ foaming method of the polyurethane foam using the in-situ foaming device 10, the temperature control tank 27A removes the polyol component and the isocyanate component from the material drum 21A containing the polyol component and the material drum 21B containing the isocyanate component. , 27B are respectively supplied to the component storage units 273A, 273B and temporarily stored. In the component reservoirs 273A and 273B of the temperature control tanks 27A and 27B, the polyol component and the isocyanate component supplied from the raw material drums 21A and 21B pass through the component reservoirs 273A and 273B. The pipes 31A, 37A, 31B, and 37B are brought into contact with each other and heated by the heat of the polyol component and the isocyanate component flowing through the secondary heating pipes 31A, 37A, 31B, and 37B. The heated polyol component and isocyanate component in the component reservoirs 273A, 273B are supplied to the primary heating devices 29A, 29B from the discharge ports 272A, 272B of the temperature control tanks 27A, 27B, and the primary heating devices 29A, 29B. After heating, the secondary heating pipes 31A, 37A, 31B, and 37B passing through the component storage portions 273A and 273B of the temperature control tanks 27A and 27B are flowed to the secondary heating pipes 31A, 37A, 31B, and 37B. The polyurethane foam is foamed by heating with the secondary heating devices 33A, 33B, 39A, and 39B provided in the container, and then supplying the polyol component and the isocyanate component to the mixing and discharging unit 49, mixing and discharging the mixture. .

このように、前記現場発泡装置１０を用いるポリウレタン発泡体の現場発泡方法によれば、前記原料ドラム２１Ａ、２１Ｂから前記温調タンク２７Ａ、２７Ｂの成分貯留部２７３Ａ、２７３Ｂに供給したポリオール成分とイソシアネート成分を、前記成分貯留部２７３Ａ、３７３Ｂの前記二次加熱用配管３１Ａ、３７Ａ、３１Ｂ、３７Ｂを流れるポリオール成分とイソシアネート成分の熱によって加熱し、この加熱した前記成分貯留部２７３Ａ、２７３Ｂ内のポリオール成分とイソシアネート成分を、前記温調タンク２７Ａ、２７Ｂ外の前記一次加熱装置２９Ａ、２９Ｂで加熱し、さらに前記成分貯留部２７３Ａ、２７３Ｂを通る前記二次加熱用配管３１Ａ、３７Ａ、３１Ｂ、３７Ｂに流して二次加熱装置３３Ａ、３３Ｂ、３９Ａ、３９Ｂで加熱した後、前記混合吐出部４９へ供給している。そのため、前記混合吐出部４９へ供給するポリオール成分とイソシアネート成分を効率よく加熱することができ、各成分の温度ムラを抑制すると共に粘度を一定にし、発泡及び物性が良好なポリウレタン発泡体を得ることができると共に、経済性を高めることができる。さらに前記温調タンク２７Ａ、２７Ｂ内に二次加熱装置３３Ａ、３３Ｂ、３９Ａ、３９Ｂを設けたことにより、前記温調タンク２７Ａ、２７Ｂの外周に二次加熱装置を設ける必要が無いため、装置の小型化を向上させることができ、かつ加熱効率を高め、経済性を高めることができる。   Thus, according to the in-situ foaming method of polyurethane foam using the in-situ foaming device 10, the polyol component and isocyanate supplied from the raw material drums 21A and 21B to the component storage portions 273A and 273B of the temperature control tanks 27A and 27B. The component is heated by the heat of the polyol component and the isocyanate component flowing through the secondary heating pipes 31A, 37A, 31B, and 37B of the component reservoirs 273A and 373B, and the polyol in the heated component reservoirs 273A and 273B The component and the isocyanate component are heated by the primary heating devices 29A and 29B outside the temperature control tanks 27A and 27B, and further to the secondary heating pipes 31A, 37A, 31B and 37B passing through the component storage portions 273A and 273B. In the secondary heating device 33A, 33B, 39A, 39B After heating, it is supplied to the mixing and discharging part 49. Therefore, it is possible to efficiently heat the polyol component and the isocyanate component to be supplied to the mixing and discharging unit 49, to suppress the temperature unevenness of each component, to make the viscosity constant, and to obtain a polyurethane foam having good foaming and physical properties. Can improve economic efficiency. Furthermore, since the secondary heating devices 33A, 33B, 39A, and 39B are provided in the temperature control tanks 27A and 27B, there is no need to provide a secondary heating device on the outer periphery of the temperature control tanks 27A and 27B. Miniaturization can be improved, heating efficiency can be improved, and economic efficiency can be improved.

また、前記現場発泡装置１０は、前記のようにポリオール成分及びイソシアネート成分の加熱効率を高め、経済性を高めることができると共に、前記温調タンク２７Ａ、２７Ｂの外周に二次加熱装置を設ける必要が無いため、装置の小型化、軽量化を向上させることができ、大きさに制限がある搬送用トラックに積載して現場へ搬送するのに好適である。   In addition, the in-situ foaming device 10 can increase the heating efficiency of the polyol component and the isocyanate component as described above, improve the economic efficiency, and needs to provide a secondary heating device on the outer periphery of the temperature control tanks 27A and 27B. Therefore, the apparatus can be reduced in size and weight, and is suitable for being loaded on a transport truck having a limited size and transported to the site.

１０ 現場発泡装置
２１Ａ ポリオール成分が収容された原料ドラム
２１Ｂ ポリイソシアネート成分が収容された原料ドラム
２７Ａ ポリオール成分用温調タンク
２７Ｂ イソシアネート成分用温調タンク
２９Ａ、２９Ｂ 一次加熱装置
３１Ａ、３１Ｂ 二次加熱用配管
３３Ａ、３９Ａ、３３Ｂ、３９Ｂ 二次加熱装置
４９ 混合吐出部 DESCRIPTION OF SYMBOLS 10 In-situ foaming apparatus 21A Raw material drum in which polyol component is accommodated 21B Raw material drum in which polyisocyanate component is accommodated 27A Temperature control tank for polyol component 27B Temperature control tank for isocyanate component 29A, 29B Primary heating device 31A, 31B For secondary heating Piping 33A, 39A, 33B, 39B Secondary heating device 49 Mixing discharge section

Claims (6)

ポリオール成分が収容された原料ドラムから、ポリオール成分をポリオール成分用温調タンクの成分貯留部へ供給して一旦貯留し、加熱したポリオール成分を混合吐出部へ供給すると共に、イソシアネート成分が収容された原料ドラムからイソシアネート成分をイソシアネート成分用温調タンクの成分貯留部へ供給して一旦貯留し、加熱したイソシアネート成分を前記混合吐出部へ供給し、前記混合吐出部でポリオール成分とイソシアネート成分を混合して吐出し、発泡させるポリウレタン発泡体の現場発泡方法において、
それぞれの前記温調タンクの下部から前記成分貯留部内の成分を排出して別々の一次加熱装置で加熱した後、それぞれの成分の前記温調タンク外から該温調タンク内の成分貯留部を経てそれぞれの温調タンク外に至るように設けられた二次加熱用配管に供給し、前記各二次加熱用配管の出口から排出した成分を前記混合吐出部に供給するようにし、
それぞれの前記温調タンク内の前記成分貯留部における前記二次加熱用配管を前記成分が流れる際に、前記二次加熱用配管に設けた二次加熱装置によって前記二次加熱用配管内の前記成分を加熱すると共に、前記温調タンクの成分貯留部に貯留されている前記成分を、前記二次加熱用配管内を流れる前記成分の熱によって加熱し、加熱された前記貯留部の前記成分を前記温調タンクの下部から排出して前記一次加熱装置で加熱した後、前記温調タンクの成分貯留部を通る前記二次加熱用配管に流れるようにしたことを特徴とするポリウレタン発泡体の現場発泡方法。 From the raw material drum containing the polyol component, the polyol component is supplied to the component storage section of the temperature control tank for the polyol component and temporarily stored, and the heated polyol component is supplied to the mixing and discharging section, and the isocyanate component is stored. Supply the isocyanate component from the raw material drum to the component storage part of the temperature control tank for the isocyanate component, temporarily store it, supply the heated isocyanate component to the mixing discharge part, and mix the polyol component and the isocyanate component in the mixing discharge part In the on-site foaming method of polyurethane foam to be discharged and foamed,
After discharging the components in the component storage part from the lower part of each temperature control tank and heating them with a separate primary heating device, the components from the outside of the temperature control tank of each component pass through the component storage part in the temperature control tank. Supply to the secondary heating pipe provided to reach the outside of each temperature control tank, to supply the component discharged from the outlet of each secondary heating pipe to the mixing and discharging unit,
When the component flows through the secondary heating pipe in the component storage section in each temperature control tank, the secondary heating apparatus provided in the secondary heating pipe causes the secondary heating pipe to While heating the component, the component stored in the component storage section of the temperature control tank is heated by the heat of the component flowing in the secondary heating pipe, and the heated component in the storage section is heated. After being discharged from the lower part of the temperature control tank and heated by the primary heating device, the polyurethane foam is made to flow into the secondary heating pipe passing through the component storage part of the temperature control tank. Foaming method. 前記各二次加熱用配管の出口は、安全バルブ、圧力センサ、流量計を経て前記混合吐出部に接続され、各成分の圧力が前記圧力センサで設定圧力超過となった際に、前記安全バルブを通じてそれぞれの前記温調タンクへ成分を戻す配管が設けられていることを特徴とする請求項１に記載のポリウレタン発泡体の現場発泡方法。 The outlet of each secondary heating pipe is connected to the mixing discharge section via a safety valve, a pressure sensor, and a flow meter, and when the pressure of each component exceeds the set pressure by the pressure sensor, the safety valve The method for foaming polyurethane foam according to claim 1, further comprising a pipe for returning a component to each of the temperature control tanks . ポリオール成分が収容された原料ドラムから供給されるポリオール成分を一旦貯留して加熱するポリオール成分用温調タンクと、イソシアネート成分が収容された原料ドラムから供給されるイソシアネート成分を一旦貯留して加熱するイソシアネート成分用温調タンクと、前記各温調タンクから供給されるそれぞれの成分を混合して吐出する混合吐出部とを備えるポリウレタン発泡体の現場発泡装置において、
それぞれの前記温調タンクは、上部に流入口を備えると共に下部に排出口を備え、内部に前記流入口から供給された成分が一旦貯留する成分貯留部を備え、
それぞれの前記温調タンクの排出口には、該排出口から排出された成分を加熱する一次加熱装置がそれぞれ接続され、
前記一次加熱装置で加熱された成分を該成分の前記温調タンク外から該温調タンク内の成分貯留部を経て該温調タンク外に流す二次加熱用配管が、それぞれの前記温調タンクに対して設けられ、
それぞれの前記二次加熱用配管には該二次加熱用配管を流れる成分を加熱する二次加熱装置が設けられ、
それぞれの前記二次加熱用配管の出口から排出された成分を前記混合吐出部に供給する流路が設けられ、
それぞれの前記温調タンク内の前記成分貯留部における前記二次加熱用配管を前記成分が流れる際に、前記二次加熱用配管に設けた二次加熱装置によって前記二次加熱用配管内の前記成分を加熱すると共に、前記温調タンクの成分貯留部に貯留されている前記成分を、前記二次加熱用配管内を流れる前記成分の熱によって加熱し、加熱された前記成分貯留部の前記成分を前記温調タンクの下部の前記排出口から排出して前記一次加熱装置で加熱した後、前記温調タンクの成分貯留部を通る前記二次加熱用配管に流れるようにしたことを特徴とするポリウレタン発泡体の現場発泡装置。 A polyol component temperature control tank that temporarily stores and heats the polyol component supplied from the raw material drum containing the polyol component, and an isocyanate component supplied from the raw material drum that stores the isocyanate component are temporarily stored and heated. In a polyurethane foam on-site foaming apparatus comprising a temperature control tank for isocyanate components, and a mixing discharge unit for mixing and discharging each component supplied from each temperature control tank,
Each of the temperature control tanks includes an inlet at the top and a discharge port at the bottom, and includes a component storage unit that temporarily stores the components supplied from the inlet,
A primary heating device for heating the component discharged from the discharge port is connected to the discharge port of each temperature control tank,
Secondary heating pipes for flowing the component heated by the primary heating device from outside the temperature control tank of the component to the outside of the temperature control tank through the component storage section in the temperature control tank, Provided against
Each of the secondary heating pipes is provided with a secondary heating device for heating a component flowing through the secondary heating pipe,
A flow path for supplying the component discharged from the outlet of each of the secondary heating pipes to the mixed discharge portion is provided;
When the component flows through the secondary heating pipe in the component storage section in each temperature control tank, the secondary heating apparatus provided in the secondary heating pipe causes the secondary heating pipe to While heating a component, the said component stored in the component storage part of the said temperature control tank is heated with the heat of the said component which flows through the inside of the said piping for secondary heating, The said component of the said component storage part heated Is discharged from the outlet at the lower part of the temperature control tank and heated by the primary heating device, and then flows into the secondary heating pipe passing through the component storage part of the temperature control tank. On-site foaming equipment for polyurethane foam. 前記各二次加熱用配管の出口は、安全バルブ、圧力センサ、流量計を経て前記混合吐出部に接続され、各成分の圧力が前記圧力センサで設定圧力超過となった際に、前記安全バルブを通じてそれぞれの前記温調タンクへ成分を戻す配管が設けられていることを特徴とする請求項３に記載のポリウレタン発泡体の現場発泡装置。 The outlet of each secondary heating pipe is connected to the mixing discharge section via a safety valve, a pressure sensor, and a flow meter, and when the pressure of each component exceeds the set pressure by the pressure sensor, the safety valve An in-situ foaming device for polyurethane foam according to claim 3, wherein piping for returning the components to the respective temperature control tanks is provided . 前記二次加熱用配管は、電熱線からなる前記二次加熱装置が収容され、前記二次加熱装置の外側を前記成分が流れることを特徴とする請求項３または４に記載のポリウレタン発泡体の現場発泡装置。 5. The polyurethane foam according to claim 3, wherein the secondary heating pipe accommodates the secondary heating device including a heating wire, and the component flows outside the secondary heating device. 6. On-site foaming equipment. 前記二次加熱用配管は、前記成分貯留部の複数箇所を通るように設けられていることを特徴とする請求項３から５の何れか一項に記載のポリウレタン発泡体の現場発泡装置。 The polyurethane foam in-situ foaming apparatus according to any one of claims 3 to 5 , wherein the secondary heating pipe is provided so as to pass through a plurality of locations of the component reservoir.
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