JP2520119B2 - Centralized fluid delivery device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention incorporates a switching discharge valve mechanism for fluids delivered from respective supply devices of fluids of the same or different types. TECHNICAL FIELD The present invention relates to a centralized delivery device for supplying fluid to an injection gun.

[Prior Art] For example, when the engine radiator is filled with antifreeze in the final stage of an automobile assembly line, the mixing ratio of the freezing point depressant may be 30% or 50% depending on the climatic conditions of the shipping area. Two types of fluid need to be selected.

In this case, prepare a supply system for each antifreeze solution with a concentration of 30% and 50%, and install an injection gun for each antifreeze solution at the end pipe joint of each system installed close to the filling line. It was connected via a flexible tube. FIG. 5 shows a system of such a two-system liquid supply system. 21 and 31 are antifreeze compounding tanks, 51 and 52 are injection guns, 53 and 54 are radiators, 42 is a vacuum tank, 61 and 62
Is a vacuum suction hose for supplying antifreeze to the injection gun 51, and 63 and 64 are similar hoses connected to the injection gun 52.

[Problems to be Solved by the Invention] As described above, when the fluids are different, when filling the dispensing container with the injection gun while switching the two types of fluids as needed, , If you prepare an injection gun for each fluid and change the type of gun you have in your hand every time you change the type, the work efficiency will not increase. In addition, extra space is needed to store the two injection guns and their associated hoses in a convenient manner. Furthermore, it is likely that a large number of these accessory hoses will be entangled with each other and hinder the smooth progress of the work.

INDUSTRIAL APPLICABILITY The present invention makes it possible to significantly improve the efficiency of the injection work for connecting a fluid injection gun capable of continuous or switching injection of the same or different kinds of fluid to the supply source of each fluid, and It is an object of the present invention to provide a centralized fluid delivery device that can save its installation space.

[Means for Solving the Problems] In order to achieve the above-mentioned object, a centralized fluid delivery device of the present invention has an outer tube for delivering fluid and an outer diameter smaller than the inner diameter of the outer tube, An inner tube for fluid delivery inserted through the outer tube and one end side of the outer and inner tubes for attaching to one end side of the inner and outer double tubes are coaxially fitted to each other. Introducing pipe joint having a set of arranged tube joints, a first inlet joint and a second inlet joint connected to the both tube joints, and a tube joint for attaching to the other end side of the outer tube And a valve mechanism such as a spray gun and a fluid injection gun connected to the tube end joint,
The end of the inner tube is open to the inside of the outer tube in the vicinity of the tube end joint.

[Operation and Effect of the Invention] In the device of the present invention having the above configuration, when the fluids are different from each other, a set of tube joints coaxially provided in the pipe joint for the concentrated introduction of different kinds of fluids. Assembly of the device is completed by fitting one end of the inner tube for delivery of the second fluid into one of the inner joints and one end of the outer tube for delivery of the first fluid in the outer joint.

The method of using this device is such that the first fluid inlet joint and the second fluid inlet joint of the pipe joint for central introduction are provided near the place of use of the device, respectively, and are connected to the supply sources of both fluids. It can be used by connecting it to the end joint of the pipe.

If necessary, the first fluid outlet of the discharge joint may be connected to the fluid injection gun.

Therefore, conventionally, when two kinds of fluids are injected by switching at any time during a series of injection flow work, two injection guns,
Whereas each fluid supply tube to each injection gun was required, that of the present invention comprises one injection gun,
The coaxial tube combined into one can be enough to save the installation space of the injection device, and also the entanglement of multiple tubes and the use of multiple flexible tubes bundled as before. This eliminates the problem that the smoothness of the swirling operation of the injection gun is lost and the efficiency of the injection work is greatly reduced due to the directionality of the bending tendency of the tube bundle. For similar fluids, you only need one tube to connect to the injection gun,
The operation of the injection gun similar to that described above is improved, and work efficiency is greatly improved.

[Embodiment] The device of the present invention will be specifically described below based on an embodiment shown in the accompanying drawings.

FIG. 1 and FIG. 2 are partially cutaway perspective views of a device of one embodiment and a pipe joint (or a discharge joint) for concentrated introduction of different kinds of fluids.
FIG.

The apparatus as a whole has a double structure tube A for concentrated delivery of the first fluid and the second fluid, a pipe joint B for introducing different fluids fitted to one end side thereof, and a tube end joint C. It consists of

The outer tube 1 that constitutes the double-structured tube A and the inner tube 2 that has an outer diameter smaller than the inner diameter of the outer tube 1 and is inserted into the outer tube 1 have substantially the same length and are flexible. It is made of rich materials such as flexible synthetic resin and synthetic rubber. The specific material may be appropriately selected according to the chemical properties of the fluid to be transported, the temperature of the fluid, and the like.

The pipe joint B for introducing different kinds of fluids is arranged coaxially and has a set of tube joints 3a and 4a for fitting one end sides of the outer tube 1 and the inner tube 2, respectively, and the outer tube joint 3a. It is provided with a first fluid inlet joint 3b in communication with each other and a second fluid inlet joint 4b in communication with the inner tube joint 4a.

Such a joint structure is made of a corrosion resistant metal material such as brass,
It may be formed by cutting an aluminum alloy or the like, or by a method of combining cast-molded parts of so-called engineering plastic having excellent physical or chemical characteristics. The shape and size of the joint may be appropriately changed in design as necessary.

The tube end joint C is provided with a tube joint 7a for fitting the downstream end of the outer tube 1 and a joint 7b for connecting to a fluid injection gun in the joint body 7.

FIG. 3 is a system diagram of the entire facility showing a case where the device of the present invention is used in a facility for filling an engine radiator with an antifreeze liquid provided at the end of an automobile assembly line.
In this case, two types of antifreeze liquids with freezing point depressant contents of 50% and 30%, respectively, can be freely switched and injected according to the shipping area of the vehicle.

The undiluted solution piping 20 connected to the undiluted solution storage tank of the freezing point depressant and the pure water piping 30 connected to the deionized pure water storage tank are
It is sent to the mixing tank 21 of 50% antifreeze and the mixing tank 31 of 30% antifreeze via the flow control solenoid valve G, respectively. 22 and 32 are agitators for stirring in the tank, 23 and 33 are liquid level gauges, g is a pressure regulating valve, p is a pump, f is a flow meter, and 24 and
34 is a pipe joint with a valve installed at the end of the two types of antifreeze supply pipes with the freezing point depressant concentrations adjusted to 50% and 30% respectively, and is installed close to the antifreeze injection line. . 25 and 35 are pneumatically operated remote control valves interposed on the upstream side of each pipe joint, and are a1, B1 and a2,
B2 indicates an antifreeze delivery line.

Further, this antifreeze liquid filling facility is additionally provided with a vacuum suction device for extracting air inside the radiator to facilitate injection. 41 is a vacuum pump, 42 is a vacuum tank, 43 and 44 are liquid separation tanks for separating water and oil in the sucked air to prevent them from entering the vacuum pump 41, and 26 is a vacuum suction pipe A pipe fitting with a valve attached to the end of b, and 27 is a pneumatically operated remote-controlled valve, which controls the connection and disconnection to a vacuum source.

The centralized delivery device for different kinds of fluids according to the present invention has two fluid inlet fittings 3b and 4b of the different kinds of fluid introduction pipe fitting B in valve fittings 24 or 34 for supply pipes of antifreeze liquid having a concentration of 30% or 50%, respectively. The other end side of the outer tube 1 of the inner / outer double tube A having one end side fitted to the tube joints 3a and 4a of the joint B is connected with an appropriate auxiliary pipe, and the other end side of the outer tube 1 is connected to the fluid injection gun D. Fluid inlet connector 10
Connect to 1.

FIG. 4 shows an example of the structure of the fluid injection gun D as a side sectional view. The gun D has an upper valve body 100 that incorporates a valve mechanism for connecting and disconnecting a fluid flow path, and a valve mechanism for connecting and disconnecting to a vacuum suction source for extracting air from the radiator so that the antifreeze liquid can be smoothly injected. It has a united structure with the built-in lower valve body 200. The upper valve body 100 includes a fluid introduction port joint 101 and a discharge port 106, and a valve body 105 is fixed to the tip of a piston rod of a piston 102 that is loosely fitted in the valve body 200 that functions as a cylinder. Reference numeral 103 is a coil closing coil spring for the valve element 105, and 110 is an intake port for compressed air for moving the piston 102 up and down.

The lower valve body 200 has a vacuum inlet 201 for connecting the vacuum suction pipe to the end fitting 26 and a fluid outlet 1
A vacuum suction port 206 formed so as to surround 06 is provided, and a valve body 205 is formed on the top dead center side of a piston 202 loosely fitted in a valve body 200 that functions as a cylinder. Reference numeral 203 is a valve closing coil spring for maintaining the valve body 205, and 210 is an inlet for the vertically moving compressed air of the piston 202. 207 is a cylindrical sealing cover made of a rubber elastic material attached so as to surround the vacuum suction port 206,
When the fluid injection gun D is pressed against the liquid injection port of the radiator, the sealing cover 207 shuts off the inside of the radiator from the outside air.

Next, an example applied to a coating circulation device as a second embodiment of the present invention will be described with reference to FIGS. 6 and 7. 30
0 is a mixing tank that stores liquid paint inside, 301
Is connected to the mixing tank 300 through a surge tank, a paint supply pump 300a, a surge tank 301, a line filter 302, a supply pipe 303, and a back pressure regulator 304 in this order. From this supply pipe 303, for example, three branch pipes 305 are extended as shown in the drawing.

Now, in FIG. 7, 307 is an inner tube 306 inside.
Is an outer tube that is inserted coaxially, and one end of this is the branch pipe 305 that is the supply side, regulator 312, ball valve
311 and a footing 308 having separate outer tube circuit and inner tube circuit are connected, and the other end is connected to a spray gun D1 for painting through a gun base fitting 313 and a quick coupler 314. On the other hand, 315 is a return side short-circuit tube, one end of which is connected to the outer tube 307 circuit through a screw-in type mouthpiece 36 and fitting 308, and the other end is a screw-in type mouthpiece 317, a ball valve 318 and It is connected to the return pipe 320 (third line) via a needle valve 319. This return pipe 320 returns to the mixing tank 300.

At the time of coating work, however, the paint in the mixing tank 300 is pumped up by the paint supply pump 300a and is supplied through the surge tank 301 and the line filter 302.
303 and back pressure regulator 304 to mixing tank 300
Circulates in. At this time, the paint flowing in the supply pipe 303 flows from the branch pipe 305 to the regulator 312 and the ball valve.
It enters the inner tube 306 through the inner circuit of 311 and the fitting 308 in order, is supplied from the gun former fitting 313 to the spray gun D1 through the quick coupler 314, and by the spray gun D1, the body to be painted of the car body etc. The object is painted. At the same time, the paint flowing in the inner tube 306 overflows from the end portion on the gun base fitting 313 side, enters the outer tube 307 and flows in the opposite direction, and returns from the fitting 308 as shown by the arrow in FIG. The paint enters the side short-circuit tube 315, the ball valve 318 and the needle valve 319 in this order, and then the return pipe 320 (third line), from which the paint returns to the mixing tank 300. In this way, the paint is always supplied during the painting work.
3. Since it circulates in the return pipe 320 and the tubes 306 and 307 on both sides, the effect peculiar to the paint circulating device that there is no inconvenience of causing sedimentation due to stagnation of the paint can be obtained. Also, at the time of painting work, the tube for connecting the spray gun D1 is only one coaxial tube with the inner and outer tubes 306 and 307, so the spray gun D1 can be moved smoothly without being bothered by the tube. As a result, the operability of the gun is greatly improved, and the painting work can be completed quickly in a short time, and good work efficiency can be obtained. Further, at the end of the painting work, it is not necessary to tie several tubes together and bundle them, so that they can be stored quickly, and a small storage space is required, which contributes to space saving.

According to the present invention, as a method for attaching a fluid carrying tube to be connected to a spray gun for injection or painting, a plurality of tubes are conventionally arranged in parallel, and the tubes are arranged coaxially. By putting together in one,
The purpose is to obtain the effect of lightening the swinging operation of the spray gun for injection or painting, and the compactness at the time of storage. It can be used very effectively for the purpose of delivering one kind or two kinds of liquids or gases.

Further, the structure of the joint B for introducing and discharging different kinds of fluids is not limited to the embodiment, and various design changes can be made.

[Brief description of drawings]

FIG. 1 is a perspective view of an apparatus according to an embodiment of the present invention, FIG. 2 is a vertical cross-sectional view of a joint for introducing (or discharging) different kinds of fluids, and FIG. 3 is a radiator of an automobile engine of two types having different concentrations. FIG. 2 is a system diagram of the entire facility showing an example of using the device of the present invention as a means for delivering the antifreeze liquid to the injection gun in the facility for selectively injecting the antifreeze liquid. FIG. 4 is a side sectional view illustrating the structure of a fluid injection gun. FIG. 5 is a system diagram of a conventional facility similar to that shown in FIG. FIG. 6 is a system diagram of the paint circulating device, and FIG. 7 is an enlarged cross-sectional view of the main part. In the figure, A ... internal / external double tube, B ... piping joint for introducing different fluids, D ... liquid injection gun, D1 ... paint spray gun, 1,306 ... outer tube, 2,307 …… Inner tube, 3a, 4a …… Tube fitting, 315 …… Short-circuit tube

Claims (1)

(57) [Claims] 1. An outer tube for transporting a fluid, an inner tube for delivering a fluid, the inner tube having an outer diameter smaller than the inner diameter of the outer tube, inserted through the outer tube, and the inner-outer double tube. A pair of tube joints, which are coaxially arranged so that the one end sides of the outer tube and the inner tube can be fitted to each other, and a first inlet joint that is connected to each of the tube joints, and A pipe joint for introduction having a second inlet joint, a tube end joint having a tube joint for attaching to the other end of the outer tube, a spray gun connected to the tube end joint, a fluid injection gun, etc. A valve mechanism of, wherein the end of the inner tube is opened into the outer tube in the vicinity of the tube end fitting. Medium delivery device.