JP2012112503A - Foamable urethane filling device, and injection gun for filling foamable urethane - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a foamable urethane filling device and an injection gun which can stably supply two material liquids respectively, can sufficiently mix, agitate and inject them without solidifying them in a device, stabilize a quality of a product, are easy in maintenance, management and operation, are reduced in cost and are easily made to be compact and light.SOLUTION: In the injection gun, a block member 17 is connected to a gun body 16. A pair of double pipes 18 are attached to the block member 17. A forked hose 28 is connected to a tip end of the block member. Pressurized air is taken in to the block member 17 from the gun body 16. The two material liquids are respectively separately sucked in the double pipes 18 and atomized by the air. The atomized liquids are mixed, agitated and injected in the forked hose 28. Only by an operation of an operating lever 21, the pressurized air is supplied. A liquid supply valve 13 is opened by the air pressure so that the two material liquids are supplied to the block member 17.

Description

  The present invention relates to a urethane foam filling apparatus and an injection gun for filling urethane foam, in which two kinds of liquids, which are raw materials for urethane foam, are mixed, stirred, and injected into a heat insulation construction site.

  For example, when filling urethane foam, which is a heat insulating material, at a heat insulation construction site in a chemical plant tank or piping, the conventional construction method is that the polyol liquid (R liquid) and polyisocyanate as raw materials are used on site. In general, the liquid (I liquid) is manually weighed once by hand, put into a small container, stirred, and poured into the construction site before curing.

  However, since the raw material liquid is manually weighed once in this way and taken into a small container and stirred, it is a batch operation and the work efficiency is poor, and there is also a measurement error. However, there are many cases in which quality varies, product defects are likely to occur, and rework for reworking takes time and costs. Therefore, it has been attempted to mechanize the work of mixing the two raw material liquids, stirring them, and ejecting them. For example, the inside of the barrel portion is made to have a double-structure flow path, and the raw material two liquids are quantitatively supplied by a pump. Inside the unit, one liquid passes through the outer flow path of the double structure, and the other liquid passes through the inner flow path, and is discharged into the nozzles respectively. There has been proposed an injection gun which is supplied, stirred and discharged from the tip of a hose. This air is supplied to the injection gun together with one liquid fed into the outer flow path (see, for example, Patent Document 1).

JP-A-9-308854

  If the work of filling urethane foam at the construction site was performed manually at the heat insulation construction site, the work efficiency was poor, product defects were likely to occur, and time was required for rework for rework. It often happens. Even with mechanized products, it is difficult to completely mix and agitate the two liquids, the highly viscous polyol liquid and the polyisocyanate liquid, which are raw materials for foamed urethane, and the quality of the product varies. There is a possibility that a void that tends to occur and impairs the heat insulation effect may be formed, so that re-construction (rework) is required, which may increase the cost. In addition, in the conventional technology, there is a risk that the two liquids are solidified before jetting and the inside of the apparatus is clogged, and the liquid volume control of the two liquids is affected by the mutual pressure, so that stable liquid volume control It is difficult, and it is necessary to operate two types of liquid and air separately, which makes the operation difficult, and makes the apparatus large and heavy, making it difficult to move and difficult to handle. As described above, as described above, the two liquids of the raw material are divided into the inner and outer sides of the dual-structure flow path, and the two liquids are mixed, stirred and discharged inside the nozzle. The same applies to injection guns. In particular, in this injection gun, when two liquids are agitated with air, the air is supplied to the injection gun together with the liquid fed into the outer flow path. The pump pressure for sending the liquid to the outer flow path becomes larger, and not only the pump needs to be enlarged, but also the control of the liquid amount of the liquid sent to the outer flow path becomes difficult. Also, it becomes difficult to control the flow rate of the liquid fed into the inner flow path.

  The present invention has been made to solve these problems, and can stably supply the two raw material liquids, sufficiently mix and agitate them, and eject them without solidifying inside the apparatus. To provide a urethane foam filling device and an injection gun for filling urethane foam that are stable in quality, easy to maintain, easy to operate, low in cost, easy to reduce in size and weight. Objective.

  The urethane foam filling device of the present invention is a foamed urethane filling device that mixes two types of liquids, which are raw materials of urethane foam, and stirs and injects them into a heat insulation construction site. The liquid container accommodates the two types of liquids separately. And a liquid feed device that sucks up two types of liquid from these liquid containers and sends them separately, an air feed device that sends pressurized air, and a supply of the two types of liquid sent from the liquid feed device. Receives the air supplied from the air feeding device and sucks two types of liquid separately in the form of a mist by blasting the air flow. And an injection gun for mixing and agitating with air pressure.

  In this urethane foam filling device, two types of liquids are sucked up by a pump from a liquid container and supplied separately to an injection gun, and these two liquids are pressurized inside the injection gun and supplied by an air flow respectively. These two liquids that have been sucked up separately to form a mist are blown off by air and flow to the tip nozzle, mixed in the tip nozzle, stirred by air pressure, and ejected from the tip nozzle.

  In this way, the two raw material liquids are sucked up by pumps and supplied separately, and are individually sucked up by the flow of air inside the injection gun to form a mist, blown off by air, and flow to the tip nozzle. By mixing in the nozzle and stirring with air pressure, the two raw material liquids are sufficiently mixed and stirred and ejected. Also, the two raw material liquids are respectively supplied by a pump, and are separately sucked up by the flow of pressurized air inside the injection gun, blown off by air, and separately sent to the tip nozzle. The amount of liquid can be easily controlled by controlling the rotation speed of the pump without being affected by the pressure of each other. Therefore, the product quality is stable, the product yield is high, and the cost is low.

  Further, since the two raw material liquids are not mixed inside the injection gun but are mixed in the tip nozzle, the inside of the injection gun is less likely to be clogged, and maintenance of the injection gun is facilitated. The two liquids mixed in the tip nozzle are ejected before almost solidifying, but a part remains in the tip nozzle, and the tip nozzle gradually becomes clogged. Therefore, replace the tip nozzle with a new one as appropriate.

  In this urethane foam filling device, a liquid container, a liquid feed device, an air feed device, and an injection gun are formed in a compact manner, and the overall size and weight can be reduced. For this reason, for example, a large-scale tank for liquefied natural gas (LNG) in a chemical plant and heat insulation work around its piping are used in a wide range of construction sites, while moving equipment in a wide range including high and low places. Even if it is necessary to work, it is easy to move and efficient work is possible.

  In addition, this urethane foam filling device includes one manually operated air supply valve for operating the supply of air sent from the air feeding device to the injection gun, and two types of liquids sent separately from the liquid feeding device. Equipped with two pneumatically operated liquid supply valves that operate the supply to the injection gun. The two liquid supply valves operate with the air supply valve opened and the air supplied to the injection gun as the power source. By opening in conjunction with the two, the raw material 2 liquid and air can be operated in a single operation with three valves, and the operation becomes easy.

  Further, this urethane foam filling device uses a diaphragm type pump with a built-in operation panel and driving device (for example, an electric motor) as a pump of the liquid feeding device, thereby further reducing the size and weight. Further, it can be easily moved and handled.

  Moreover, this urethane foam filling apparatus can implement | achieve smooth transfer and mixing by lowering | hanging the viscosity of a liquid by attaching a heater to a liquid container and managing liquid temperature.

  And this urethane foam filling device can be made easy to use, such as using a free power source of 100V to 220V, or enabling the use of a small generator.

  An injection gun for filling urethane foam according to the present invention is an injection gun for filling urethane foam in which two types of liquid, which are raw materials for urethane foam, are mixed, agitated and ejected, and injected into a heat insulation construction site. Receives two types of liquids and receives pressurized air supply. Two types of liquids are sucked up separately by air flow to form a mist, and the two types of mist can be exchanged. It is characterized in that it is mixed in a tip nozzle and stirred by air pressure and ejected.

  This injection gun sucks up two types of liquids separately by air flow and mists them. The two types of mists are mixed in a freely changeable tip nozzle and agitated with air pressure and ejected. By doing so, the two raw material liquids can be sufficiently mixed and stirred and ejected. Also, the two raw material liquids can be sucked up separately by the flow of air pressurized inside the injection gun, blown off with air, and sent separately to the tip nozzle. It is possible to easily control the amount of the two liquids without being affected by the pressure of each other. Therefore, it is possible to stabilize the product quality, increase the product yield, and realize low cost.

  Further, in this injection gun, since the two raw materials are not mixed inside the injection gun but mixed in the tip nozzle, the inside of the injection gun is less likely to be clogged, and maintenance of the injection gun is facilitated. Further, the two liquids mixed in the tip nozzle are ejected before almost solidifying, but a part of the two liquids remain in the tip nozzle, and the tip nozzle gradually becomes clogged. Therefore, replace the tip nozzle with a new one as appropriate.

  And this injection gun, in particular, two parallel spaces formed to take in two types of liquid separately at the tip of the gun body with an air flow path that takes in pressurized air and sends it forward, A block member having an air supply space formed to take in air from the air flow path of the gun body and send it out to two parallel spaces is connected, and a double pipe takes air from the air supply space to the inside pipe and outside It is inserted into the two parallel spaces of the block member in a parallel arrangement from the front so that it can be detachably inserted and fixed, so as to form a double structure nozzle that draws the liquid into the tube and sucks the liquid by the air flow at the tip side. The hose is connected to the tip of the two double pipes at the bifurcated portion so as to form a tip nozzle, and is connected to two parallel blocks. Two kinds of liquids taken in between are flowed to the outer pipes of the respective double pipes, and pressurized air is passed to the inner pipes of the respective double pipes. The two raw materials are mixed with each other in the bifurcated hose and agitated with air pressure to eject them. The effect of mixing the two raw liquids in the tip nozzle and stirring them with air pressure is increased, and the two raw liquids are completely mixed, stirred and ejected. Can do. Also, in this case, the two raw material liquids can be sucked up separately by the flow of pressurized air inside the injection gun, blown off with air, and sent separately to the tip nozzle. The liquid amounts of the two liquids can be easily controlled without being affected by each other's pressure, so that the product quality can be stabilized, the product yield can be increased, and the cost can be reduced.

  In addition, the injection gun configured in this way stops the liquid supply after use and blows air away by air, thereby blowing off the liquid remaining inside the block member and sucking out the liquid from the double pipe with negative pressure. The block member and the inside of the double pipe can be cleaned so that they are not clogged, and the double pipe can be removed from the block member, and the block member can be removed from the gun body to clean each one. Also, parts replacement is easy.

  In this injection gun, the two parallel spaces of the block member are formed in an L shape so that liquid can be taken in from below, and the air supply space is formed in a T shape so that air is introduced from behind and sent out to the two parallel spaces. It is good to have.

  The injection gun is preferably configured to use the internal pressure of the air supply space of the block member as a power source for a pneumatically operated liquid supply valve that operates supply of two types of liquids to the injection gun. .

  As described above, according to the present invention, the two raw materials of urethane foam can be stably supplied, mixed sufficiently, stirred, and ejected without being hardened inside the apparatus, and the product quality is improved. In addition to being stable, maintenance management is easy, operation is easy, cost is low, and miniaturization and weight reduction are easy.

1 is an overall view of a urethane foam filling device according to an example of an embodiment of the present invention. It is a figure which shows the structure of the injection gun which concerns on an example of embodiment of this invention, (a) is a top view shown with a partial cross section, (b) is a side view shown with a partial cross section. It is a figure which shows the structure of the block member of the injection gun which concerns on an example of embodiment of this invention, (a) is a top view, (b) is a front view, (c) is a side view. It is a figure which shows the structure of the double structure nozzle of the injection gun which concerns on an example of embodiment of this invention, (a) is sectional drawing of a double structure nozzle, (b) is single-piece | unit sectional drawing of an outer pipe | tube, (c) FIG. 4 is a single sectional view of an inner tube. It is a flowchart of the urethane foam filling apparatus which concerns on an example of embodiment of this invention.

1 to 5 show an example of an embodiment of the present invention.
The urethane foam filling device of this embodiment uses a polyol liquid (hereinafter referred to as R liquid) and a polyisocyanate liquid (hereinafter referred to as I liquid) as raw materials, and these two types of liquids (hereinafter referred to as raw material 2 liquids, or It is simply referred to as two liquids), mixed and agitated, injected into a heat insulation location, foamed and cured, and the overall configuration of the apparatus is as shown in FIG.

  This urethane foam filling device accommodates two raw material liquids (R liquid and I liquid) in an R liquid tank 1 (liquid container) and an I liquid tank 2 (liquid container), respectively. As the R liquid tank 1 and the I liquid tank 2, for example, a funnel can is used. Then, a heater (not shown) is wound around these R liquid tank 1 and I liquid tank 2 to keep the liquid temperature at about 23 to 40 ° C., for example.

  The urethane foam filling device includes an injection gun 3 and an R liquid feeding device 5 that sucks up the raw material 2 liquid from the R liquid tank 1 and the I liquid tank 2 by pumps 4 and 4 separately and feeds them into the injection gun 3. And an I liquid feeder 6.

  And as the pumps 4 and 4 of the R liquid feeding device 5 and the I liquid feeding device 6, a diaphragm type pump (for example, manufactured by Takumina Co., Ltd., trade name: Solenoid driving fixed quantity) equipped with an operation panel and a driving device (for example, solenoid type). Pump, model number: PZiG-1300) is used. This diaphragm pump is a compact and lightweight pump, and has an operation panel and a driving device, so there is no need to separately install an operation panel or a motor. Therefore, the entire system of the urethane foam filling device can be reduced in size and weight. In addition, this pump is power-free and easy to use. Since this pump can control rotation steplessly, the mixing ratio of the liquid can be finely adjusted.

  The R liquid feeding device 5 and the I liquid feeding device 6 are provided with a pressure reducing valve 7 and a damper 8 in order to stabilize the flow rate of the liquid sent out by the pumps 4 and 4, and a relief valve 9 is provided for protecting the pump. Yes.

  Pumps other than the diaphragm pump may be used as the pumps 4 and 4 used in the R liquid feeding device 5 and the I liquid feeding device 6. For example, a tube pump may be used. Even when a tube pump is used, the amount of liquid is stabilized by using a pressure reducing valve and a damper. In addition, a gear pump or the like can be used.

  The R liquid feeding device 5 and the I liquid feeding device 6 have legs 10 and 10 that can accommodate the R liquid tank 1 or the I liquid tank 2 between the legs, respectively. 4 and 4, a suction side pipe (not shown) for sucking the liquid from the R liquid tank 1 or the I liquid tank 2 and sucking it into the pumps 4, 4 and the discharge for sending out the liquid discharged from the pumps 4, 4 The side pipes 11 and 11 are arranged, and relief valves 9 and 9, pressure reducing valves 7 and 7, and dampers 8 and 8 are arranged in the middle of the discharge side pipes 11 and 11.

  Then, the liquid feeding hoses 12 and 12 are connected to the outlets of the discharge-side pipes 11 and 11 of the R liquid feeding device 5 and the I liquid feeding device 6, respectively, and pneumatic operations are performed at the tips of these hoses 12 and 12. Liquid supply valves 13 and 13 (for example, CKD Corporation, trade name: small cylinder valve NAB type, model number: NAB1-8) are attached. Liquid supply hoses 14 and 14 for separately supplying R liquid and I liquid to the injection gun 3 are connected to liquid supply hoses 12 and 12 via liquid supply valves 13 and 13, respectively.

  The urethane foam filling device includes an air feeding device 15 that uses a compressor to pressurize air (air) to about 0.4 MP, for example, and sends the air to the injection gun 3 through the air feeding hose 41. ing.

  The injection gun 3 receives the supply of the raw material 2 liquid sent from the R liquid feed device 5 and the I liquid feed device 6 and the supply of the air sent from the air feed device 15 to flow the raw material 2 liquid through the air flow. Each of the two mist-like liquids is mixed and agitated, ejected, and injected into the insulation construction site. The gun body 16 (air gun) and the gun body 16 It is composed of a rectangular parallelepiped block member 17 connected to the tip, and a pair of double tubes 18 and 18 projecting forward of the block member 17. The detailed structure of the injection gun 3 is as shown in FIG. In FIG. 2, the raw material 2 liquid supplied to the injection gun 3 and mixed, stirred, and ejected and the air flow contributing to the mixing, stirring, and ejection are indicated by arrows. The flow indicates the flow, and the white arrow indicates the flow of air.

  The gun body 16 is composed of a cylindrical barrel portion 19 and a hollow grip portion 20, and takes in pressurized air from the lower end of the grip portion 20 and feeds it forward from the front end of the barrel portion 19. A flow path (not shown) is formed. The gun body 16 is provided with a manually operated air supply valve (not shown) that opens and closes an internal air flow path to operate air supply near the base of the grip portion 20. An operation lever 21 for operating the valve is installed in the body portion 19. The air supply valve is normally held at a position where the air flow path is closed by a spring bias, and the opening operation rod 22 protrudes slidably to the outside of the grip portion 20. Then, the operation lever 21 is opposed to the tip of the rod 22 and is normally held at a position away from the rod 22 by spring bias. When the operation lever 21 is pulled with a finger, the operation lever 21 pushes the rod 22 The air supply valve is configured to open.

  As shown in FIGS. 2 and 3, the block member 17 has two parallel spaces 23, 23 formed to take in the R liquid or the I liquid separately and the air from the air flow path of the gun body 16. And an air supply space 24 formed to be sent out to the two parallel spaces 23, 23.

  The two parallel spaces 23 and 23 of the block member 17 are each formed in an L shape with a drill hole from below and a drill hole from the front so that the R liquid or the I liquid can be taken from below. Further, the air supply space 24 is formed in a T shape with a drill hole from the rear and a through hole penetrating to the left and right sides so that air is introduced from behind and sent out to the two parallel spaces 23 and 23. The lower and front drilling holes constituting the L-shaped parallel spaces 23, 23 are formed with nipple mounting female screws that connect the air feeding hoses 14, 14 to the lower drilling holes. In the drill hole from the front, a female screw for fixing the tubes 27 and 27 outside the double tubes 18 and 18 to be described later is formed. In addition, a nipple attached to the tip of the body portion 19 of the gun body 16 is formed in the drill hole from the rear that forms the T-type air supply space 24 and the through hole that penetrates to the left and right sides. A female screw for attaching a nipple for connecting air pressure sending hoses 25 and 25 to be described later is formed at both ends of the through hole. In addition, a double pipe 18, 18, which will be described later, is connected to a communicating portion to the parallel spaces 23, 23 provided in the through hole of the air supply space 24 so as to send air from the air supply space 24 to the two parallel spaces 23, 23. An internal thread for fixing the inner pipes 26, 26 is formed. This urethane foam filling device opens and closes the liquid supply valves 13 and 13 using the internal pressure (air pressure) of the air supply space 24 of the block member 17 as a power source. The air pressure is taken out from both the left and right ends, and guided to the actuators of the on-off valves 13 and 13 as operating pressure via the air pressure sending hoses 25 and 25.

  The double pipes 18 and 18 constitute a double structure nozzle that sucks up the two raw material liquids with air and blows them off in a mist form. As shown in FIG. 2 and FIG. And the outer pipes 27, 27. Air is taken into the inner pipes 26, 26 from the air supply space 24, and the R liquid or I liquid is taken into the outer pipes 27, 27. Is inserted and fixed in a releasable manner in a parallel arrangement from the front in each of the two parallel spaces 23 and 23 of the block member 17 so as to suck up the air. For example, as shown in FIG. 4, the inner pipes 26 and 26 and the outer pipes 27 and 27 of the double pipes 18 and 18 are respectively configured such that the inner pipe 26 includes a pipe portion 26 a made of a pipe member and a block body. The fixed portion 26b is joined and integrated by brazing or the like, and the outer pipes 27 and 27 are also joined and integrated by brazing or the like with the pipe portion 27a made of a pipe member and the fixed portion 27b made of a block body. It is a thing. The double tubes 18 and 18 have, for example, outer tube diameters of the outer tubes 27 and 27 of 5 mm or less (for example, 4 mm) and an inner diameter of 3 mm, inner tubes 26 and 26 having an outer diameter of 2 mm and an inner diameter of 1 mm. .5 mm.

  The fixing portions 26b, 27b of the inner pipes 26, 26 have male screws for screwing and fixing to the female screws of the communicating portions to the parallel spaces 23, 23 provided in the through holes of the air supply space 24. Formed on the fixing portions 27b, 27b of the outer pipes 27, 27 are male threads for screwing and fixing to the female threads formed in the drill holes from the front of the parallel spaces 23, 23 of the block member 17. Has been. The pipe members constituting the pipe portions 26a and 27a and the block bodies constituting the fixing portions 26b and 27b are made of aluminum or steel. Further, other metal materials may be used.

  A bifurcated hose 28 made of vinyl is connected to the tips of the two double pipes 18 and 18 at a bifurcated portion. The bifurcated hose 28 constitutes a tip nozzle that mixes, mixes, and squirts the mist-like raw material 2 liquid.

  The urethane foam filling device of this embodiment has an injection gun 3 in its hand, and the liquid supply valves 13 and 13 are used at a heat insulation construction site, for example, put on a shoulder or put in a pocket. The pumps 4 and 4 of the R liquid feeding device 5 and the I liquid feeding device 6 are operated, and the compressor of the air feeding device 15 is operated. Then, the injection gun 3 is directed to the construction site, and the operation lever 21 is pulled. The subsequent operation is as shown in FIG. In FIG. 5, each element (each device and each member) of the urethane foam filling device is indicated by a corresponding symbol. The details of the operation are as follows.

  When the operation lever 21 is pulled, the air supply valve inside the gun body 16 is opened, and the air pressurized by the compressor of the air feeding device 15 enters the gun body 16, and the block member 17 from the air flow path inside the gun body 16. Air is supplied to the internal air supply space 24. When air is supplied to the air supply space 24 inside the block member 17, the internal pressure (air pressure) of the air supply space 24 is guided to the actuators of the two liquid supply valves 13 and 13, and the actuator is activated. Then, the two liquid supply valves 13 and 13 are opened in conjunction with the air supply valve. Then, the R liquid and the I liquid sucked up from the R liquid tank 1 and the I liquid tank 2 by the pumps 4 and 4 of the R liquid feeding device 5 and the I liquid supply device 6 are converted into two liquid supply spaces 23, 23, respectively. At that time, the R and I liquids sucked up by the pumps 4 and 4 are adjusted in volume by controlling the rotation speed of the pumps 4 and 4, and the flow rate is stabilized through the pressure reducing valves 7 and 7 and the dampers 8 and 8. Let Further, in order to protect the pumps 4 and 4, overpressure is prevented by the relief valve 9.

  When air is supplied to the block member 17 and the R and I liquids are supplied in this way, the R and I liquids separately taken into the two parallel spaces 23 and 23 of the block member 17 are supplied to the respective double tubes 18. , 18 flows to the outer pipes 27, 27 (flows to the outside of the inner pipes 26, 26), and pressurized air flows to the inner pipes 26, 26 of the respective double pipes 18, 18; The R and I liquids are sucked up separately by the suction effect of the air flow and become mist. The two mists are sprayed into the tip nozzle formed by the bifurcated hose 28, and the tip nozzle Is mixed and mixed with air pressure and spouted.

  In the urethane foam filling device of this embodiment, the raw material 2 liquid is not mixed inside the gun body 16 and the block member 17 and hardly mixed inside the double pipes 18 and 18. Further, the injection gun 3 having the double pipes 18 and 18 as main components is less likely to be clogged, and the maintenance management of the injection gun 3 is easy.

  The two liquids mixed in the bifurcated hose 28 constituting the tip nozzle are ejected before most of them are solidified. Therefore, the bifurcated hose 28 is hardly clogged during construction. However, some of it remains after use, so it gradually becomes clogged. Therefore, the bifurcated hose 28 is made of vinyl so that it can be procured at low cost and can be disposable. The bifurcated hose 28 is replaced with a new one when clogged.

  Moreover, the urethane foam filling device of this embodiment has a double structure nozzle by attaching the double pipes 18 and 18 to the block member 17 connected to the gun body 16 of the injection gun 3, so that the raw material 2 liquid is supplied with air. By the suction effect by the flow, each can be separately sucked into a mist. Then, the effect of mixing the mist-like raw material 2 liquid in the tip nozzle constituted by the bifurcated hose 28 and stirring it with air pressure is enhanced, and the raw material 2 liquid can be completely mixed, stirred and ejected. In addition, the two raw materials are less affected by each other's pressure, and it is easy to control the amount of liquid by controlling the number of revolutions of the pump. Together, these effects stabilize the quality of the product and improve the product yield. Is expensive and low cost.

  In this urethane foam filling device, the two raw material liquids are each in the form of a mist, and the mists collide with each other by the air pressure and are sufficiently stirred. Therefore, only the tip nozzle is constituted by the simple bifurcated hose 28 as described above, and no other special stirring means is provided. However, in order to further increase the stirring rate, for example, various methods such as twisting the bifurcated hose 28 or inserting a spiral guide in the hose can be used.

  This urethane foam filling device opens the two liquid supply valves 13 and 13 in conjunction with the opening of the air supply valve of the gun body 16 by one operation of pulling the operation lever 21. And air can be operated all at once with one valve operation, and the operation is easy.

  And this urethane foam filling apparatus compactly forms R liquid tank 1 and I liquid tank 2, R liquid feeding apparatus 5 and I liquid feeding apparatus 6, air feeding apparatus 15, and injection gun 3 all. Therefore, the entire urethane foam filling device can be reduced in size and weight. This reduction in size and weight is even easier particularly when a diaphragm pump with an operation panel and a drive device is used as the liquid feed pumps 4 and 4. By reducing the size and weight of the urethane foam filling equipment in this way, the construction site has a wide range of construction sites, such as heat insulation work around large tanks and piping of liquefied natural gas (LNG) in chemical plants. Even if it is necessary to work while moving it in a wide range including high places and low places, it is easy to move and efficient work becomes possible.

  And this urethane foam filling device can be made easy to use, such as using a 100V power supply in addition to a 200V power supply, or enabling the use of a small generator.

  The injection gun 3 stops the liquid supply after use, and blows off the air remaining in the block member 17 by blowing off air, and sucks out the liquid from the gun tube 18 with a negative pressure, thereby blocking the block member 17. And the inside of the double pipe 18 can be cleaned so as not to be clogged, and further, the double pipe 18 can be removed from the block member 17 and the block member 17 can be removed from the gun body 16, so that each is removed. Can be cleaned and parts can be easily replaced.

  As mentioned above, although an example of embodiment of this invention was demonstrated, this invention is not limited to this, It is possible to change and implement various aspects.

  The present invention is not limited to the heat insulation construction of tanks and pipes of chemical plants, but can be applied to heat insulation construction at various sites such as the spraying work of the wall of the heat insulating material.

1 R liquid tank (liquid container)
2 I liquid tank (liquid container)
DESCRIPTION OF SYMBOLS 3 Injection gun 4 Pump 5 R liquid feeder 6 I liquid feeder 7 Pressure reducing valve 8 Damper 9 Relief valve 13 Liquid supply valve 15 Air feeder 16 Gun body 17 Block member 18 Double pipe 21 Operation lever 23 Parallel space 24 Air supply Space 25 Hose 26 for sending air pressure Inner tube 27 Outer tube 28 Fork hose (tip nozzle)

In addition, this urethane foam filling device uses, for example, a diaphragm pump with a built-in operation panel and drive device (for example, solenoid type ) as a pump of the liquid feeding device, thereby further reducing the size and weight. Further, it can be easily moved and handled.

Claims (8)

A foamed urethane filling device that mixes and stirs two kinds of liquid foam raw materials and injects them into a heat insulation construction site.
Liquid containers that separately store the two types of liquids, liquid feeding devices that pump up the two types of liquids from these liquid containers, respectively, and air feeding devices that send pressurized air, Receiving the supply of two types of liquid sent from the liquid feeding device and receiving the supply of air sent from the air feeding device, each of the two types of liquid is sucked up separately by the flow of air to form a mist, A foamed urethane filling apparatus comprising: an injection gun that mixes these two types of liquid in a mist form in a freely changeable tip nozzle and stirs and jets with air pressure. One manually operated air supply valve for operating the supply of air sent from the air feeder to the injection gun, and the two kinds of liquids sent separately from the liquid feeder to the injection gun, respectively. Equipped with two pneumatically operated liquid supply valves that operate the supply,
2. The foaming according to claim 1, wherein the two liquid supply valves open using the air supplied to the injection gun when the air supply valve is opened as a power source and are operated in conjunction with the operation of the air supply valve. Urethane filling equipment. The urethane foam filling device according to claim 1 or 2, wherein the liquid feeding device uses a diaphragm pump having an operation panel and a driving device. 4. The urethane foam filling device according to claim 1, wherein a heater is attached to the liquid container. An injection gun for filling urethane foam that mixes two liquids that are raw materials for foamed urethane, agitates and jets them, and injects them into the insulation construction site.
The two types of liquids that are supplied with the two types of liquids and that are supplied with pressurized air are separately sucked up by the flow of air to form a mist. An injection gun for filling urethane foam, characterized in that it is mixed in a nozzle having a freely replaceable tip and stirred by air pressure to be ejected. From the two parallel spaces formed to separately take in the two kinds of liquids at the tip of the gun body having an air flow path that takes in pressurized air and sends it forward, and from the air flow path of the gun body A block member having an air supply space formed to take in air and send it out to the two parallel spaces is connected,
The double pipe is configured to form a double structure nozzle that takes air from the air supply space into the inner pipe, takes the liquid into the outer pipe, and sucks the liquid by the air flow at the tip side. Removably inserted and fixed in a parallel arrangement from the front in each of the two parallel spaces,
A bifurcated hose is removably connected to the tip of the two double pipes in a bifurcated portion so as to constitute the tip nozzle,
The two types of liquid separately taken into the two parallel spaces of the block member are caused to flow to the outer pipes of the respective double pipes, and pressurized air is allowed to flow to the inner pipes of the respective double pipes. , Each liquid is sucked up by the flow of air and made into a mist, and the two kinds of mist are mixed in a bifurcated hose and agitated by air pressure to be ejected. 5. An injection gun for filling urethane foam according to 5. The two parallel spaces of the block member are formed in an L shape so that liquid can be taken in from below, and the air supply space is formed in a T shape so that air is introduced from behind and sent out to the two parallel spaces. An injection gun for filling urethane foam according to claim 6. The internal pressure of the air supply space of the block member is used as a power source of a pneumatically operated liquid supply valve for operating supply of the two kinds of liquids to the injection gun. Or the injection gun for urethane foam filling of 7.

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