JP2021065815A - Heater hose unit and on-site spray type foaming machine unit comprising the same - Google Patents

Abstract

To provide a heater hose unit which can perform temperature adjustment at a part on an on-site spray type foaming machine side and temperature adjustment at a part on a spray gun side separately.SOLUTION: A heater hose unit is so configured as to connect hoses a1, a2 with built-in heater, a first connection unit, hoses c1, c2 with built-in heater, and a second connection unit, 1) electrically isolate the connected hoses a1, c1 with built-in heater and the connected hoses a2, c2 with built-in heater in a first connection unit, 2) electrically isolate the hoses c1, c2 with built-in heater and a spray gun in a second connection unit, 3) assure electrical connection between heating parts of the hoses a1, a2 with built-in heater at an end part on a first connection member side, and 4) assure electrical connection between the hoses c1, c2 with built-in heater at an end part on a second connection member side.SELECTED DRAWING: Figure 1

Description

The present invention relates to a heater hose unit and a field-sprayed foaming machine provided with the heater hose unit, and in particular, a heater hose unit preferably used when performing field-foaming of polyurethane foam, and a field-sprayed foaming machine provided with the heater hose unit. It's about the machine.

Conventionally, various devices have been used to form polyurethane foam by spraying a liquid mixture of a polyol and a polyisocyanate onto an adherend and foaming and curing it on the surface of the adherend at a construction site such as a construction site. Is known (for example, the polyurethane foam manufacturing apparatus described in Patent Document 1).

In such a manufacturing apparatus used at a construction site (hereinafter, simply referred to as a foaming machine), generally, two kinds of liquid raw materials heated by the foaming machine are pumped to a spray gun through a transport pipe such as a hose. A hose with a built-in heater is generally used as the hose for connecting the foaming machine and the spray gun in order to prevent the temperature of the liquid raw material from dropping when moving in the hose (FIG. 4 of Patent Document 1). See).

Here, the hose with a built-in heater includes a heat generating portion that generates heat when energized and heats the fluid flowing in the hose, and has a connector at one end in the longitudinal direction and a connecting metal fitting at the other end. Each is assembled, and while the lead wire for energizing the heat generating portion extends at one end side, the heat generating portion and the connecting metal fitting are electrically connected at the other end. Those exhibiting a squeezed structure are more widely known than before.

When using a hose with a built-in heater having the above-mentioned structure in a foaming machine, there are the following two heating methods.

In the first method (hereinafter referred to as independent temperature control), each of the two built-in heater hoses is assembled to the foaming machine at the end on the side where the lead wire for connecting to the external power supply extends. On the other hand, the connection fittings arranged at the other end are electrically connected to each other and are assembled to the spray gun. In such a configuration, since the two hoses with built-in heaters are electrically connected, the lead wire extending from one hose with a built-in heater and the lead wire extending from the other hose with a built-in heater are connected to an external power source. As a result, the two hoses with built-in heaters are heated, and the liquid raw material flowing inside each hose is also heated.

However, the above-mentioned single temperature control has an advantage that the hose on the spray gun side is relatively lightweight and the workability of the builder is improved, but there is a problem that fine temperature control cannot be performed.

On the other hand, in the second method (hereinafter referred to as individual temperature control), each of the two heater built-in hoses is used as a foaming machine at the end on the side where the lead wire for connecting to the external power supply extends. On the other hand, each of the connection fittings arranged at the other end is provided with wiring for connecting to an external power source, and is assembled to the spray gun in such a state. That is, in the individual temperature control, each of the two heater built-in hoses is connected to a separate external power source and heated.

However, although the above-mentioned individual temperature control has the advantage that the temperature of each of the two heater hoses can be adjusted individually, wiring for connecting to an external power source is arranged near the spray gun. Therefore, the weight of the entire hose (particularly the hose near the spray gun) becomes excessive, which causes deterioration of the workability of the installer. In addition, in this individual temperature control, there is also a problem that the wiring is easily broken because the hose near the spray gun, which moves relatively frequently during the construction work, is provided with the wiring for connecting to the external power supply. ..

Further, when the spraying work is performed while energizing the heater built-in hose with the heater built-in hose wound around the reel hose, the heater built-in hose wound around the reel hose is excessively heated. It is very difficult to control such excessive heating in both the control and the individual temperature control, and there is also a problem that the excessive heating for the hose accelerates the deterioration of the hose. It is.

Japanese Unexamined Patent Publication No. 2005-2000844

Here, the present invention has been made in the context of such circumstances, and the problems to be solved are the temperature control at the portion attached to the on-site spray type foaming machine and the spray gun. It is an object of the present invention to provide a heater hose unit capable of separately performing temperature control at a portion to be attached to. Another object of the present invention is to provide an on-site spray type foaming machine provided with such a heater hos unit.

Then, in order to solve the above-mentioned problems, the present invention can be preferably carried out in various aspects as listed below. It is understood that the aspects or technical features of the present invention are not limited to those described below and can be recognized based on the invention idea that can be grasped from the description of the specification. Should be.

(1) A heater hose unit that supplies two types of liquid raw materials, which are interposed between the on-site spray type foaming machine and the spray gun and pumped from the on-site spray type foaming machine, to the spray gun.
From the side connected to the on-site spray type foaming machine to the side connected to the spray gun, 1) two heater built-in hoses a1, a2, 2) the first connecting unit, and 3) two. The hoses c1 and c2 with built-in heaters of the book and 4) the second connecting unit are connected and configured.
Each of the heater built-in hoses a1, a2, c1 and c2 has a hose body portion provided with a heat generating portion for heating the fluid flowing inside the hose, which generates heat when energized.
The heater built-in hose a1 and the heater built-in hose c1 are connected via the first connecting unit, and the heater built-in hose a2 and the heater built-in hose c2 are connected, while the first one. In the connecting unit of the above, the above-mentioned heater built-in hoses a1 and c1 connected and the heater built-in hoses a2 and c2 connected are electrically insulated.
The heater hoses c1 and c2 are each connected to the second connecting unit, while the heater hoses c1 and c2 and the spray gun are electrically insulated from each other in the second connecting unit. ,
The heat generating portion of the heater built-in hose a1 and the heating portion of the heater built-in hose a2 are electrically connected at the end of the hose on the first connecting unit side.
The heat generating portion of the heater built-in hose c1 and the heating portion of the heater built-in hose c2 are electrically connected at the end of the hose on the second connecting unit side.
A heater hose unit that features that.
(2) Both the heater built-in hoses a1 and a2 are conductive contact portions electrically connected to the heat generating portion of the hose main body at at least one end in the longitudinal direction of the hose main body. The pipe joint member with is assembled,
The first connecting unit has a connecting member in which the pipe joint members of the heater built-in hoses a1 and a2 are connected in parallel, and the connecting member is used in the pipe joint member of each hose. The heater hose unit according to the above aspect (1), wherein the conductive contact portion is electrically connected.
(3) In the first connecting unit, two insulating hoses b1 and b2 are assembled in parallel at an end of the connecting member on the side opposite to the side to which the heater built-in hoses a1 and a2 are connected. The heater hose unit according to the above aspect (2).
(4) Both the heater built-in hoses c1 and c2 are conductive contact portions electrically connected to the heat generating portion of the hose main body at at least one end in the longitudinal direction of the hose main body. The pipe joint member with is assembled,
The second connecting unit has a connecting member in which the pipe joint members of the heater built-in hoses c1 and c2 are connected in parallel, and the connecting member is used in the pipe joint member of each hose. The heater hose unit according to any one of the above-described aspects (1) to the above-described aspect (3), wherein the conductive contact portion is electrically connected.
(5) In the second connecting unit, two insulating hoses d1 and d2 are assembled in parallel at an end of the connecting member opposite to the side to which the heater built-in hoses c1 and c2 are connected. The heater hose unit according to the above aspect (4).
(6) In any one of the above-described aspects (1) to (5), in which the heater hoses a1 and a2 are arranged in parallel and / or the heater hoses c1 and c2 are arranged in parallel. Described heater hose unit.
(7) The aspect (1) to (1) to the above aspect (1) to which the temperature sensor is arranged in any one of the heater built-in hoses a1 and a2 and / or the heater built-in hose c1 and c2. The heater hose unit according to any one of the above aspects (6).
(8) The heater hose unit according to any one of the above-described aspects (1) to (7), wherein at least a part thereof is wound around a hose reel.
(9) The heater hose unit according to any one of the above-described aspects (1) to the above-described aspect (8), wherein the spray gun is connected to the second connecting unit.
(10) An on-site spraying type foaming machine unit comprising the on-site spraying type foaming machine provided with the heater hose unit according to any one of the above aspects (1) to (9).
(11) The on-site spraying according to the above-described embodiment (10), wherein the power supply to the heater built-in hoses a1 and a2 and the power supply to the heater storage hoses c1 and c2 are carried out from different power sources, respectively. Mold foaming machine unit.

As described above, in the heater hose unit according to the present invention, when assembled to the on-site spray type foaming machine, the heater built-in hoses a1 and a2 located on the foaming machine side are energized and located on the spray gun side. It is possible to separate the energization of the heater built-in hoses c1 and c2 from each other. For example, power is supplied to the heater built-in hoses a1 and a2 located on the foaming machine side and power is supplied to the heater built-in hoses c1 and c2 located on the spray gun side from separate power sources, and the voltage is appropriately supplied. By changing the above, in the heater hose unit of the present invention, the heater built-in hoses a1 and a2 located on the foaming machine side and the heater built-in hoses c1 and c2 located on the spray gun side are independently heated. It is possible to control. Therefore, by using the heater hose unit of the present invention, it is possible to supply a liquid material adjusted to a more appropriate temperature to the spray gun as compared with a conventional hose with a built-in heater or the like.

As described above, it is possible to independently control the temperature of the heater built-in hoses a1 and a2 located on the foaming machine side and the temperature control of the heater built-in hoses c1 and c2 located on the spray gun side. Therefore, the heater hose unit of the present invention can advantageously suppress overheating of the hose as compared with a conventional hose with a built-in heater or the like.

Further, by appropriately controlling the energization of the heater built-in hoses c1 and c2 located on the spray gun side, the spraying operation can be performed at a more appropriate temperature.

Further, for example, when the spraying operation is performed while the heater built-in hoses a1 and a2 located at least on the foaming machine side are wound around the hose reel, the wound heater built-in hoses a1 and a2 are excessively heated. By controlling the energization of the heater built-in hoses a1 and a2 in anticipation of this, it is possible to advantageously suppress excessive heating of the heater built-in hoses a1 and a2 wound around the hose reel. By suppressing the occurrence of such overheating, it is possible to prevent premature deterioration of the hose with a built-in heater.

In addition, in the heater hose unit according to the present invention, the wiring for energizing the heater built-in hoses c1 and c2 located on the spray gun side is arranged at a position relatively distant from the spray gun. The weight in the vicinity of the gun can be reduced, which contributes to the improvement of workability of the builder and effectively suppresses the disconnection of the wiring.

It is a top view which shows one Embodiment of the heater hose unit which follows this invention. It is a top view which shows the heater built-in hose which constitutes the heater hose unit shown in FIG. It is a top view which shows the 1st connecting member which comprises the heater hose unit shown in FIG. It is a top view which shows the 2nd connecting member which comprises the heater hose unit shown in FIG. It is explanatory drawing which shows one structure of the on-site spray type foaming machine provided with a heater hose unit. It is explanatory drawing which shows typically the on-site foaming work of polyurethane foam at a construction site. It is a top view which shows another example of a hose with a built-in heater. It is explanatory drawing which shows another structure of the field spray type foaming machine which can use the heater hose unit of this invention.

Hereinafter, the present invention will be described in detail with reference to the drawings as appropriate. The drawings attached to the present application may be partially exaggerated and schematically drawn in order to facilitate understanding of the characteristic parts of the present invention. , Should be understood.

FIG. 1 is a plan view showing a heater hose unit according to an embodiment of the present invention. 2 to 4 are plan views showing each member constituting the heater hose unit shown in FIG. 1.

First, each member constituting the heater hose unit 10 shown in FIG. 1 will be described. The heater built-in hose 12a (12b) shown in the plan view of FIG. 2 is configured by assembling metal pipe joint members 16 at both ends in the longitudinal direction of the hose body portion 14a (14b).

More specifically, the hose body portion 14a (14b) is provided with a heat generating portion for heating the fluid flowing inside the hose body portion 14a (14b), which generates heat when energized. The hose with a built-in heater used in the present invention can be used without particular limitation as long as it is provided with a hose main body having such a heat generating portion. The hose body of the hose with a built-in heater is composed of, for example, a pressure resistant layer, an insulating layer, a heat generating layer, a heat insulating layer, and an outer layer laminated in this order on the outer peripheral surface of an inner tube through which a fluid passes. Can be mentioned. Further, the lengths of the hose main bodies 14a and 14b are not particularly limited in the present invention. For example, the hose body portions 14a and 14b each have a length of about 10 to 200 m, and [the length of the hose body portion 14a (the hose body portion on the foaming machine side)]: [the hose body portion 14b (spray gun side). The combination of the heater built-in hose 12a having the hose body 14a and the heater built-in hose b having the hose body 14b, in which the length of the hose body) = 2: 8 to 5: 5, is advantageous in the present invention. Used for. Further, each of the heater built-in hoses 12a (12b) may be configured by connecting a plurality of heater built-in hoses.

Further, metal pipe joint members 16 having female threaded portions (not shown) formed on the inner peripheral surfaces thereof are provided at both ends of the hose main body portion 14a (14b) in the longitudinal direction. It is assembled in a state of being electrically connected to the heat generating part in. That is, in the present embodiment, the entire pipe joint member 16 functions as a conductive contact portion electrically connected to the heat generating portion of the heater built-in hose 12a (12b). In addition, as an on-site spray type foaming machine, a foaming machine in which the connection port of the heater hose unit is configured to be able to supply not only liquid raw materials but also electric power is used. When the two hoses with built-in heaters 12a according to the embodiment are connected, the two hoses with built-in heaters 12a and the foaming machine are electrically connected, and in combination with the configuration of the first connecting unit 18 described later, the two hoses are connected. It is possible to supply electric power to the heater built-in hose 12a. When a foaming machine having such a configuration is used, power can be supplied from the connection port of the foaming machine as described above, and each of the two heater built-in hoses 12a is insulated. It is also possible to supply electric power by connecting to the connection port of the foaming machine via a hose and connecting an electric cable for supplying electric power from the foaming machine to each pipe joint portion 16 of the two hose with built-in heater 12a. It is possible.

FIG. 3A is a plan view of the first connecting unit 18, and FIG. 3B is a plan view showing a partially disassembled state of the first connecting unit 18. As is clear from FIG. 3B, pipe joint members 20 having female threaded portions (not shown) formed on the inner peripheral surface are assembled to both ends of the two insulating hoses 22 in the longitudinal direction. Further, the metal connecting member 24 is formed with two pipe joint portions 25 having a male screw type outer peripheral surface of a portion protruding from both the left and right side surfaces. By screwing the pipe joint member 20 of the insulating hose 22 into each of the two pipe joint portions 25 in such a connecting member 24, the first connecting unit 18 shown in FIG. 3A is configured. There is.

Then, the pipe joint member 16 of the heater built-in hose 12a is connected (screwed) to each of the pipe joint portions 25 of the connecting member 24, and one heater built-in hose 12a and one insulating hose 22 are connected to each other. One heater built-in hose 12a and the other insulating hose 22 are communicated with each other. Further, since the pipe joint member 16 of the heater built-in hose 12a is electrically connected to the heat generating portion of the hose body portion 14a and the connecting member 24 is made of metal, the two heater built-in hoses 12a The heat generating portion is electrically connected by the first connecting unit 18. That is, in the present embodiment, the entire connecting member 24 functions as a conductive portion that electrically connects the heat generating portions of the two heater built-in hoses 12a. In the present invention, the method of electrically connecting the heat generating portions of the two heater built-in hoses 12a is not limited to the one connected by the connecting member 24 as described above, and for example, the heater built-in hose. It is also possible to secure an electrical connection by connecting an electric cable connected to the heat generating portion of 12a at the end portion of the heater built-in hose 12a on the first connecting unit 18 side.

On the other hand, FIG. 4A is a plan view of the second connecting unit 26, and FIG. 4B is a plan view showing a partially disassembled state of the second connecting unit 26. As is clear from FIG. 4B, pipe joint members 28 having female threaded portions (not shown) formed on the inner peripheral surface are assembled to both ends of the two insulating hoses 30 in the longitudinal direction. Further, the metal connecting member 32 is formed with two pipe joint portions 33 having a male screw type outer peripheral surface of a portion protruding from both the left and right side surfaces. By screwing the pipe joint member 28 of the insulating hose 30 into each of the two pipe joint portions 33 in such a connecting member 32, the second connecting unit 26 shown in FIG. 4A is configured. There is.

Then, the pipe joint member 16 of the heater built-in hose 12b is connected (screwed) to each of the pipe joint portions 33 of the connecting member 32, and one heater built-in hose 12b and one insulating hose 30 are connected to each other. One heater built-in hose 12b and the other insulating hose 30 are communicated with each other. Further, since the pipe joint member 16 of the heater built-in hose 12b is electrically connected to the heat generating portion of the hose body portion 14b and the connecting member 32 is made of metal, the two heater built-in hoses 12b The heat generating portion is electrically connected by the second connecting unit 26. That is, in the present embodiment, the entire connecting member 32 functions as a conductive portion that electrically connects the heat generating portions of the two heater built-in hoses 12b. In the present invention, the method of electrically connecting the heat generating portions of the two heater built-in hoses 12b is not limited to the one connected by the connecting member 32 as described above, and for example, the heater built-in hose. It is also possible to secure an electrical connection by connecting an electric cable connected to the heat generating portion of 12b at the end of the heater built-in hose 12b on the side of the second connecting unit 26.

The insulating hose in the first connecting unit and the insulating hose in the second connecting unit in the present invention are not particularly limited as long as they exhibit insulating properties as a whole, and conventionally known ones are used. Can be used. Further, the configuration of the insulating hose in each connecting unit and the length of the insulating hose in each connecting unit may be the same or different between the first connecting unit and the second connecting unit. For example, the length of the insulating hose in the first connecting unit is set to about 10 cm to 1 m, while the length of the insulated hose in the second connecting unit is reduced by reducing the weight in the vicinity of the spray gun and burdened by the sprayer. It is also possible to make it about 1 to 3 m in order to reduce the problem.

It is also possible to interpose another hose between the second connecting unit and the spray gun. Further, in the present embodiment, an insulating hose is adopted in the first connecting unit and the second connecting unit, but in the present invention, 1) two heater built-in hoses and a spray located on the foaming machine side. Two hoses with built-in heaters located on the gun side can be connected so that fluid can move in an insulated state, and 2) two hoses with built-in heaters located on the spray gun side and the spray gun are insulated. As long as the fluid can be moved and connected in this state, the configuration is not particularly limited and can be used. For example, in the first connecting member and / or the second connecting member, it is possible to use an insulator instead of the insulating hose as described above.

Then, the two heater built-in hoses 12a and 12a are assembled to the first connecting unit 18, and the two heater built-in hoses 12b and 12b are assembled to the first connecting unit 18, and the two heater built-in hoses 12b, By assembling the second connecting unit 26 to 12b, the heater hose unit 10 is a liquid raw material formed by communicating the heater built-in hose 12a, the insulating hose 22, the heater built-in hose 12b, and the insulating hose 30. There are two flow paths. In the present embodiment, the pipe joint member 20 arranged at the end of the insulating hose 22 of the first connecting unit 18 and the pipe joint member 16 arranged at the end of the heater built-in hose 12b are In each case, since the female threaded portion is formed on the inner peripheral surface, the pipe joint member 20 and the pipe joint member 16 have a male screw type on the outer peripheral surface of the portion protruding from both the left and right side surfaces. It is connected via the intermediate pipe joint member 35.

Further, as shown in FIG. 1, in the heater hose unit 10 according to the present embodiment, the spray gun 34 is connected to the pipe joint member 28 in the second connecting unit 26, and two heaters are connected. A temperature sensor 36a is arranged on the outer peripheral surface of one hose in the built-in hose 12a, and a temperature sensor 36b is arranged on the outer peripheral surface of the other hose in the two built-in hose 12b. .. In FIG. 1, 38a is a sensor cable of the temperature sensor 36a, and 38b is a sensor cable of the temperature sensor 36b. Further, electric cables 40a and 40b for supplying electric power from an external power source are electrically connected to the pipe joint member 16 on the side connected to the first connecting unit 18 of the two heater built-in hoses 12b. ing.

When the spraying work is performed using the heater hose unit 10 having the above-described configuration, the heater hose unit 10 is easy to handle, and the electric leakage to the outside or the electric shock of the installer may occur. In general, in the heater hose unit 10, the portion surrounded by the black dotted line in FIG. 1 is integrally gathered, and the periphery thereof is covered with an insulating material such as insulating tape. It will be used for spraying work.

By the way, as the on-site spray type foaming machine that forms polyurethane foam on the surface of the adherend by using the heater hose unit 10 described above, for example, the one having the configuration shown in FIG. 5 is advantageously used.

As can be seen from FIG. 5, the field spray foamer 50 comprises a first supply system 52 for supplying a liquid polyol, a second supply system 54 for supplying a liquid polyisocyanate, and a liquid polyol. A heating device 56 for heating the liquid polyisocyanate, a heating device 58 for heating the liquid polyisocyanate, and a control device 60 are provided.

In the first supply system 52, the tank 62 for accommodating the polyol is arranged at the upstream end thereof, while the polyol is supplied from the tank 62 to the first pipeline 66 to which the connection port 64 is attached at the downstream end. The first pump 68 for pumping, the first pump 70 for pumping the polyol pumped by the first pump 68 toward the connection port 64, and the first pump 70 for measuring the discharge pressure of the first pump 70. The pressure gauge 72 and the heating device 56 are connected to each other.

On the other hand, in the second supply system 54, the tank 74 for accommodating the polyisocyanate is arranged at the upstream end thereof, while the tank 74 is provided in the second pipeline 78 to which the connection port 76 is attached at the downstream end. The discharge pressure of the second pump 80 for pumping more polyisocyanate, the second pump 82 for pumping the polyisocyanate pumped by the second pump 80 toward the connection port 76, and the second pump 82. A second pressure gauge 84 for measuring the above and a heating device 58 are connected and configured.

Further, although not shown in FIG. 5, the first supply system 52 has a thermometer for measuring the temperature of the polyol in the heating device 56, and the second supply system 54 has a poly in the heating device 58. Each thermometer for measuring the temperature of isocyanate is arranged, and the measurement data by these thermometers is configured to be transmitted to the control device at any time.

Here, the connection port 64 in the first supply system 52 and the connection port 76 in the second supply system 54 are each electrically connected to a power source (not shown), and the power source is a control device 60 and an electric cable. It is connected. Further, the first pump 68, the first pump 70, the first pressure gauge 72 and the heating device 56 in the first supply system 52, and the second pump 80 and the second pump 80 in the second supply system 54. The second pump 82, the second pressure gauge 84, and the heating device 58 are all connected to the control device 60, in which the control device 60 stops and starts each pump, controls the pressure, and controls the pressure of each heating device. It is possible to control the temperature and receive measurement data from each pressure gauge.

When the on-site spray type foaming machine 50 having the above configuration is used, the pipe joint members 16 and 16 of the heater built-in hoses 12a and 12a in the heater hose unit 10 are connected to the connection ports 64 and 76 in the on-site spray type foaming machine 50. The electric cables 40a and 40b that are connected and electrically connected to the heater built-in hoses 12b and 12b are connected to an external power source (not shown in FIG. 5) controlled by the control device 60, and further. The sensor cables 38a and 38b of the temperature sensors 36a and 36b are connected to the control device 60.

Then, when the on-site spray foaming machine 50 is started by operating the control device 60 in a state where such a connection is secured, 1) the polyol pumped up from the tank 62 under the control of the control device 60. Is pumped in the first pipeline 66 by the first pump 70, heated by the heating device 56, sent to the heater hose unit 10 from the connection port 64, while 2) pumped from the tank 74. The polyisocyanate is pumped in the second pipeline 78 by the second pump 82, heated by the heating device 58, and sent to the heater hose unit 10 from the connection port 76. The polyol and polyisocyanate sent to the heater hose unit 10 are heated or kept warm even in the heater hose unit 10, and when the liquid temperature-adjusted polyol and polyisocyanate reach the spray gun 34, they are mixed and stirred there. Then, the spraying of the mixture of the polyol and the polyisocyanate is started.

As described above, in the heater hose unit 10 according to the present invention, power is supplied to the heater built-in hose 12a located on the foaming machine side and power is supplied to the heater built-in hose 12b located on the spray gun side, respectively. Since it can be performed separately, it is possible to independently control the heating state of the heater built-in hoses 12a and 12a located on the foaming machine side and the heater built-in hoses 12b and 12b located on the spray gun side. It is possible. Therefore, when the heater hose unit 10 is used, it is possible to supply a polyol and a polyisocyanate adjusted to a more appropriate temperature to the spray gun 34 as compared with a conventional hose with a built-in heater or a heater hose unit. ..

Further, in FIG. 6, the installer performs on-site foaming work of polyurethane foam at the construction site by using the on-site spraying type foaming machine 50 in which the heater hose unit 10 is assembled (on-site spraying type foaming machine unit). As shown in FIG. 6, when the spraying operation is performed with a part of the heater hose unit 10 wound around the hose reel 90. However, for example, by reducing the supply of power to the heater built-in hose 12a located on the foaming machine side, it is possible to effectively prevent the heater hose unit 10 wound around the hose reel 90 from being overheated. It is possible.

Although one of the typical embodiments of the present invention has been described in detail above, it goes without saying that the present invention is not limited to the above-described embodiments. In addition, in FIGS. 7 and 8 referred to in the following description, the parts having the same configuration and function as the parts or parts specified in FIGS. 1 to 5 are attached with reference to FIGS. 1 to 5. The same code as the above code is attached, and detailed description thereof will be omitted.

For example, instead of the heater built-in hose 12a (12b), a hose body portion 14a (14b) is attached to one end (left end in FIG. 7) such as the heater built-in hose 92a (92b) shown in FIG. A pipe joint member 94 that is not electrically connected to the heat generating portion of) is assembled, and the hose body portion 14a (14b) is assembled from one end (the end on the side to which the pipe joint member 94 is assembled). The lead wire 96 electrically connected to the heat generating portion of)) can be used in the heater hose unit of the present invention even if the lead wire 96 is separately extended. In such a heater built-in hose 92a (92b), power is supplied to the heater built-in hose 92a (92b) by connecting a power source to the lead wire 96.

Further, in the above-described embodiment, the connection between the pipe joint member and the pipe joint portion is made by screwing, but the present invention is not limited to such screwing, and piping such as a coupler is used. Any conventionally known configuration can be used as long as it can be connected. Further, it is of course possible to interpose an intermediate joint in order to connect the pipe joint member and the pipe joint portion.

In addition, as the field spraying type foaming machine to which the heater hose unit of the present invention is connected, the field spraying type foaming machine 50 shown in FIG. 5 such as the field spraying type foaming machine 100 specified in FIG. A foaming machine according to a configuration in which a third supply system 102 for pumping a foaming agent is added to the foaming agent can also be used.

In the field spray type foaming machine 100 shown in FIG. 8, the third supply system 102 is provided to add a foaming agent to the polyol flowing through the first supply system 52. In the third supply system 102, a tank 104 filled with a foaming agent at a high pressure is arranged at the upstream end, and a third pump 106 for pumping the foaming agent to the first supply system 52 and a third pump 106 are provided. It is composed of a third pressure gauge 108 that measures the discharge pressure of the pump 106, an on-off valve 110 that is a solenoid valve, a check valve 112, and a third pipeline 114 that connects these components. Further, in the on-site spray type foaming machine 100, the control device 60 is configured to control the discharge amount of the third pump 106 and the operation of the on-off valve 110, and the control device 60 is the third. It is connected to the third pressure gauge 108 so that the measured value of the pressure gauge 108 can be received at any time. The on-off valve 110 may be a flow rate adjusting valve or a pressure adjusting valve.

In the on-site spraying type foaming machine 100 having such a configuration, the foaming operation is carried out while the supply of the foaming agent to the first supply system 52 is appropriately controlled by the control device 60.

Further, in the field spraying type foaming machine shown in FIGS. 5 and 8, it is possible to perform bidirectional communication with the control device 60 and operate the control device 60 even at a place away from the control device 60. It is possible to use it in the present invention even if it is provided with a remote monitoring operation device capable of performing it.

In addition to the specific descriptions described above, the present invention may be modified, modified, improved, etc. based on the knowledge of those skilled in the art as long as it does not deviate from the gist of the present invention. It should be understood that.

10 Heater hose unit 12a, 12b Heater built-in hose 18 First connection unit 26 Second connection unit 34 Spray gun 36a, 36b Temperature sensor 50 Field spray foamer 100 Field spray foamer

Claims (11)

A heater hose unit that is inserted between the on-site spray type foaming machine and the spray gun and supplies two types of liquid raw materials that are pumped from the on-site spray type foaming machine to the spray gun.
From the side connected to the on-site spray type foaming machine to the side connected to the spray gun, 1) two heater built-in hoses a1, a2, 2) the first connecting unit, and 3) two. The heater built-in hoses c1 and c2 and 4) the second connecting unit are connected and configured.
Each of the heater built-in hoses a1, a2, c1 and c2 has a hose main body portion provided with a heat generating portion for heating the fluid flowing inside the hose, which generates heat when energized.
The heater built-in hose a1 and the heater built-in hose c1 are connected via the first connecting unit, and the heater built-in hose a2 and the heater built-in hose c2 are connected, while the first connection. In the unit, the heater built-in hoses a1 and c1 connected to the heater built-in hoses a2 and c2 are electrically insulated from each other.
The heater hoses c1 and c2 are each connected to the second connecting unit, while the heater hoses c1 and c2 and the spray gun are electrically insulated from each other in the second connecting unit. ,
The heat generating portion of the heater built-in hose a1 and the heat generating portion of the heater built-in hose a2 are electrically connected at the end of the hose on the first connecting unit side.
The heat generating portion of the heater built-in hose c1 and the heating portion of the heater built-in hose c2 are electrically connected at the end of the hose on the second connecting unit side.
A heater hose unit that features that. Each of the heater built-in hoses a1 and a2 is a pipe joint member having a conductive contact portion electrically connected to a heat generating portion of the hose main body at at least one end in the longitudinal direction of the hose main body. Is assembled,
The first connecting unit has a connecting member in which the pipe joint members of the heater built-in hoses a1 and a2 are connected in parallel, and the conductive member of each of the hose's pipe joint members. The heater hose unit according to claim 1, wherein the contact portion is electrically connected. The first connecting unit is configured by assembling two insulating hoses b1 and b2 in parallel at an end of the connecting member opposite to the side to which the heater built-in hoses a1 and a2 are connected. The heater hose unit according to claim 2. Each of the heater built-in hoses c1 and c2 is a pipe joint member having a conductive contact portion electrically connected to a heat generating portion of the hose main body at at least one end in the longitudinal direction of the hose main body. Is assembled,
The second connecting unit has a connecting member in which the pipe joint members of the heater built-in hoses c1 and c2 are connected in parallel, and in the connecting member, the conductivity of the pipe joint member of each hose. The heater hose unit according to any one of claims 1 to 3, wherein the contact portion is electrically connected. The second connecting unit is configured by assembling two insulating hoses d1 and d2 in parallel at an end of the connecting member opposite to the side to which the heater built-in hoses c1 and c2 are connected. The heater hose unit according to claim 4. The heater hose unit according to any one of claims 1 to 5, wherein the heater hoses a1 and a2 are arranged in parallel, and / or the heater hoses c1 and c2 are arranged in parallel. Any one of claims 1 to 6 in which a temperature sensor is provided on any one of the heater built-in hoses a1 and a2 and / or on any one of the heater built-in hoses c1 and c2. The heater hose unit according to item 1. The heater hose unit according to any one of claims 1 to 7, wherein at least a part thereof is wound around a hose reel. The heater hose unit according to any one of claims 1 to 8, wherein a spray gun is connected to the second connecting unit. An on-site spraying type foaming machine unit comprising the on-site spraying type foaming machine provided with the heater hose unit according to any one of claims 1 to 9. The on-site spray type foaming machine unit according to claim 10, wherein power is supplied to the heater built-in hoses a1 and a2, and power is supplied to the heater built-in hoses c1 and c2, respectively, from different power sources.

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