JPH0453544Y2 - - Google Patents

Description

[Detailed description of the invention] [Field of industrial application] The present invention is a device that supplies or injects a predetermined amount of a different type of fluid from a sub-path at a constant ratio to a main fluid flowing through a main path. The present invention relates to a proportional injector capable of supplying a different type of fluid at a constant ratio even at a relatively small flow rate.

[Conventional technology]

Examples of such devices currently in use are those shown in FIGS. 4 and 5. In order to rotate the rotor 160 in the rotor chamber 130, a plurality of blades 160a are installed on the rotor 160 at equal intervals, and the blades 160a are installed at equal intervals.
From the inlet 110 through which the main fluid passes 60a to the outlet 1
20, the rotor 160 is rotated by the force of this main fluid, and this rotation is transferred to the reduction gear mechanism 30.
0 to the tube pump 400 to supply a different type of fluid in accordance with this rotation.

[Problem that the invention attempts to solve]

Therefore, the fluid acts on the blades, but the fluid remains trapped between the adjacent blades of the rotor and the inner wall of the rotor chamber, which creates resistance while the rotor rotates. However, this rotor did not rotate, especially in the small flow range, so it lacked reliability. Furthermore, when different types of fluids are mixed at a fixed ratio to the main fluid, irregular rotation will cause variations in the mixing ratio of these fluids, making it impossible to automate such work. Ta. Furthermore, since it is impossible to use in a small flow rate range, the flow rate used may be 1/10 to 1/1/1 of the maximum flow rate under usage conditions where the flow rate is sometimes high and sometimes small. 15, there are various problems such as the fact that such a proportional injector cannot be used at all.

[Means for solving problems]

This invention was devised with the aim of solving the above problems and supplying a different type of fluid to the main flow fluid at a constant constant rate accurately over a wide flow range from large flow areas to small flow areas. In a proportional injector having a tube pump 40 for supplying a different fluid by pressing a supply tube 45 disposed around the roller housing 41 by rotation of a roller housing 41 having a roller 43 rotatably attached to the housing, the inlet 11 and the outlet 12 are connected to each other. A rotor 16 made of polyethylene synthetic resin and having a specific gravity smaller than that of water is disposed in the rotor chamber 13 formed between the rotor chamber 13 and rotatable along the rotor chamber 13, and is made of at least a fluid such as water, which has a specific gravity smaller than water. The rotor chamber 13 is located in the center of
A rotor shaft 17 fixed to a rotary disk 15 that is rotatable around a central axis 14 and has one end protruding and the other end rotatably supported by the central axis 14 is inserted through the rotor shaft 17, and the rotor shaft 17 is inserted into the upper part of the rotor chamber 13. A transmission member 21 having an engagement groove 21a that engages with the protruding end of the rotor shaft 17 is rotatably supported in a gear case 20 fixed to the gear case 20, and the transmission member 21 has a reduction gear having a predetermined reduction ratio set in advance. A transmission gear 3 is connected to a driven shaft 35 via a mechanism 30 and meshes with teeth formed on the outer periphery of the roller housing 41 rotatably supported by the gear case 20 on the driven shaft 35.
The rotor 16 is rotatably supported by an annular inner wall 13a at the center of the rotor chamber 13.

[Effect]

As fluid flows in from the inlet 11, the rotor 16 swings and rotates. This oscillating rotation of the rotor 16 causes the rotor shaft 17 to rotate around the central axis 14, which is transmitted to the transmission member 21, and transmitted from the reduction gear mechanism 30 to the roller housing 41 via the transmission gear 37, which rotates. . As a result, the roller 43 of the roller housing 41 sequentially presses the supply tube 45, so that a suction action is generated by the restoring force of the supply tube 45 at the same time as the discharge action of the pump, and the dissimilar fluid passing through the supply tube 45 is absorbed by the roller housing 41. It is supplied proportionally according to the rotation. During the supply of this different fluid, the rotor 1
6 has relatively little rotational frictional resistance even in a small flow rate range, so it rotates smoothly.

〔Example〕

An embodiment of the present invention will be described below with reference to FIGS. 1 to 3. In FIGS. 1 and 2, 10 is a rotor case having an inlet 11 and an outlet 12, and a rotor chamber 13 is formed in this rotor case 10. A central shaft 14 is installed in the center of the rotor chamber 13, and a rotating disc 15 made of polyethylene synthetic resin, which has a specific gravity smaller than that of the fluid, such as water, rotates on the central shaft 14. Possibly supported. A rotor shaft 17 is fixed to this rotating disk 15 and is inserted through the center of a rotor 16 that swings and rotates in the rotor chamber 13. This rotor 16 is formed around the central shaft 14 of the rotor chamber 13. It is supported by an annular inner wall 13a. This reduces the sliding resistance of this rotor 16. In addition, this rotor 16 and rotor shaft 17
It is also made of synthetic resin, which has a lower specific gravity than fluid.

On the other hand, a transmission member 2 rotatably supported by a gear case 20 fixed to the rotor case 10 is attached to the protruding end of the rotor shaft 17 inserted through the rotor 16.
1 is engaged with an engagement groove 21a formed in the radial direction, and a main gear 31 with a small number of teeth constituting a reduction gear mechanism 30 is fixed to the other end of this transmission member 21. The main gear 31 meshes with a gear 32 having a large number of teeth, and one gear group of the reduction gear mechanism 30 is rotatably supported by a first guide shaft 33 arranged parallel to an extension of the central shaft 14. The other gear group is connected to the first guide shaft 33.
The second guide shaft 34 is rotatably supported by a second guide shaft 34 arranged parallel to the second guide shaft 34 . These reduction gear mechanisms 30 are built in the gear case 20, and the main gear 31 is connected to a driven gear 36 fixed to a driven shaft 35 which is rotatably supported by the gear case 20 via the reduction gear mechanism 30. They mesh together. A transmission gear 37 is fixed to the other end of the driven shaft 35 and meshes with teeth formed on the outer periphery of a roller housing 41 rotatably supported via a support shaft 42 fixed to the gear case 20. As a result, the roller housing 41 is rotated.

Furthermore, as shown in FIG. 2, on the outer periphery of this roller housing 41 there are four
rollers 43 are each rotatably supported,
This roller housing 41 and the gear case 20
A tube pump 40 is constructed by disposing a supply tube 45 with a large elastic restoring force for sucking a different fluid different from the main fluid and flowing it out from the tip thereof. .

Next, the operation of this embodiment will be explained. The main fluid is supplied from the inlet 11 of the rotor case 10 and enters the rotor chamber 13 . As a result, this fluid acts on the rotor 16, and the rotor 16 swings and rotates around the central axis 14. At this time, the entrance 1 of the rotor case 10
As shown in FIG. 3A, the fluid from 1 enters the rotor chamber 13 and displaces the rotor 16, so the rotor 16 moves as shown in FIGS. 3B and 3C.
The rotor shaft 17 of the rotor 16 turns around the central axis 14, and this turning causes the transmission member 2
Give rotation to 1.

In this way, when the rotor 16 oscillates and rotates according to the flow rate, this rotation is decelerated and transmitted from the main gear 31 via the gear group to the driven gear 36 as shown in FIG. Transmitted from the gear 37 to the roller housing 4 of the tube pump 40
1 in a predetermined direction. Therefore, the supply tube 45 is sequentially pressed by the roller 43, and the different fluids are thereby supplied forward at a constant ratio.

In this embodiment, the rotation of the rotor 16 is used as a drive source for the tube pump 40.
Instead, if the rotation of the rotor 16 is extracted to display the flow rate, it is possible to provide a flow meter that can accurately display the flow rate in a small flow rate range.

[Effect of idea]

As is clear from the embodiments described above, the present invention has a rotor chamber 13 formed between an inlet 11 and an outlet 12, which is capable of swinging and rotating along the rotor chamber 13, and which has at least a specific gravity smaller than that of a fluid, such as water. A rotor 16 made of polyethylene-based synthetic resin is disposed, and the rotor 16 is rotatable around a central shaft 14 implanted in the rotor chamber 13 at the center thereof, with one end protruding and the other end attached to the central shaft 14. A rotor shaft 17 fixed to a rotatably supported rotary disk 15 is inserted through the gear case 20 fixed to the upper part of the rotor chamber 13. A transmission member 21 is rotatably supported, and a driven shaft 3 is connected to the transmission member 21 via a reduction gear mechanism 30 in which a predetermined reduction ratio is set in advance.
5, and the gear case 2 is connected to this driven shaft 35.
a transmission gear 37 that meshes with teeth formed on the outer periphery of the roller housing 43 rotatably supported at
The rotor 16 is rotatably supported by an annular inner wall 13a at the center of the rotor chamber 17.

Therefore, the fluid frictional resistance caused by this fluid on the rotor is greatly reduced, so the rotor can rotate reliably, especially in a small flow rate region.
Improved reliability. Furthermore, even when different types of fluids are mixed at a fixed ratio to the main fluid, the rotation is performed accurately according to the flow rate, so the mixing ratio of these fluids remains constant, making it possible to automate such work. becomes possible. Furthermore, since this proportional injector constantly rotates regardless of whether the main fluid has a small flow rate or a large flow rate, it can perform proportional injection over an extremely wide usable flow range (approximately 3 to 4 times) compared to conventional ones. The device can be operated. For example, it can sufficiently cope with usage conditions such as a large flow rate at some times and a small flow rate at other times, and has a wide range of uses. Moreover, the rotor, rotor shaft, and rotating disk that are acted on by this main fluid are all made of polyethylene-based synthetic resin, which has a specific gravity smaller than the fluid, for example, in the case of water, so they are constantly floating in the fluid. Therefore, since the resistance between the rotor chamber and the rotor chamber is reduced, the torque required for rotation is significantly reduced, and remarkable effects such as reliable operation even with a small flow rate can be obtained.

[Brief explanation of the drawing]

Fig. 1 is a sectional view of main parts showing an embodiment of the present invention, Fig. 2 is a plan view of Fig. 1, Figs. 1 and 5 are sectional views of main parts showing a conventional example. 10 is a rotor case, 11 is an inlet, 12 is an outlet, 13 is a rotor chamber, 13a is an annular inner wall, 14 is a central shaft, 15 is a rotating disk, 16 is a rotor, 17 is a rotor shaft, 20 is a gear case, 21 is transmission member,
21a is an engagement groove, 30 is a reduction gear mechanism, 31 is a main gear, 32 is a gear, 33 is a first guide shaft, 34 is a second guide shaft, 35 is a driven shaft, 36 is a driven gear, 3
7 is a transmission gear, 40 is a tube pump, 41 is a roller housing, 42 is a support shaft, 43 is a roller,
44 is a cam block, and 45 is a supply tube.

Claims (1)

[Claims for Utility Model Registration] 1. A plurality of rollers 43 rotatably attached to the outer periphery
In a proportional injector having a tube pump 40 that supplies a different type of fluid by pressing a supply tube 45 arranged around the supply tube 45 by rotation of a roller housing 41 having a rotor chamber 13 formed between an inlet 11 and an outlet 12. A rotor 16 that can swing and rotate along the rotor 16 is disposed within the rotor 16, and a rotor shaft 17 that is rotatable around the central axis 14 of the rotor chamber 13 and has one end protruding is fixed to the center of the rotor 16. A gear case 20 fixed to the upper part of the rotor chamber 13 rotatably supports a transmission member 21 having an engagement groove 21a that engages with the protruding end of the rotor shaft 17, and a predetermined reduction ratio is set in the transmission member 21. A driven shaft 35 is connected to the driven shaft 35 through a reduction gear mechanism 30, and a transmission gear 37 that meshes with teeth formed on the outer periphery of the roller housing 41 rotatably supported by the gear case 30 is connected to the driven shaft 35. A proportional injector characterized in that it is fixed. 2. Utility model registration claim 1, characterized in that the rotor shaft inserted through the rotor 16 is fixed to a rotating disk 15 rotatably supported by the central shaft 14 of the rotor chamber 13. Proportional injector as described. 3 The rotor has an annular inner wall 13a formed in the center.
A proportional injector according to claim 1 or 2 of the utility model registration claim, characterized in that it is supported by: 4. The proportional injector according to claim 1, 2 or 3 of the utility model registration, wherein the rotor is made of synthetic resin having a specific gravity lower than that of the fluid. 5. The proportional injector according to claim 1, 2, 3 or 4, wherein the rotor shaft is made of synthetic resin having a specific gravity lower than that of the fluid.