JP2019039478A - Flow channel changeover valve - Google Patents

Abstract

To provide a novel flow channel changeover valve available for various applications.SOLUTION: A flow channel changeover valve 1 of this invention includes a fluid supply part 10 having a flow channel 11, a fluid takeout part 30 having a plurality of flow channels 31 and 32, and a connecting part 20 having a flow channel 21 and connecting the fluid supply part 10 and the fluid takeout part 30. The connecting part 20 is rotatable, and an inlet of the flow channel 21 is communicated with an outlet of the flow channel 11 of the fluid supply part 10, and an outlet of the flow channel 21 is communicated with an inlet of one of the flow channels of the fluid takeout part 30 (flow channel 31 in Fig.2), and the flow channel of the fluid takeout part 30 to be communicated with can be changed by rotation.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a flow path switching valve.

  A multidirectional switching valve has been proposed that aims to distribute the liquid in the tank to two or more locations with a single valve (see Patent Document 1).

JP 2004-11666 A

  However, there is a need for a fluid flow path switching valve that can be used in various applications, not limited to the distribution of liquid in a tank.

  Then, an object of this invention is to provide the new flow-path switching valve which can be utilized for various uses.

In order to achieve the above object, the flow path switching valve of the present invention comprises:
A fluid supply having a flow path;
A fluid outlet having a plurality of flow paths;
A connecting portion having a flow path and connecting the fluid supply portion and the fluid extraction portion;
Including
The connecting portion is
Is rotatable,
The channel inlet communicates with the channel outlet of the fluid supply unit,
The flow path outlet communicates with the flow path inlet of any flow path of the fluid take-out section, and the flow path of the fluid take-out section can be switched by rotation.
It is characterized by that.

  The flow path switching valve of the present invention can be used for flow path switching of various fluids without limiting the application.

FIG. 1 is a perspective view showing an example of the appearance of the flow path switching valve of the present invention. FIG. 2 is a perspective view showing an example of the internal structure of the flow path switching valve shown in FIG. FIG. 3 is a schematic diagram for explaining the basic design of the flow path switching valve of the present invention. FIG. 4 is a plan view showing an example of a connecting portion in the flow path switching valve of the present invention. FIG. 5 (A) is a partially enlarged perspective view for explaining a leakage fluid discharge circuit and packing in the flow path switching valve of the present invention, and FIG. 5 (B) is a residual pressure in the flow path switching valve of the present invention. It is a partial expansion perspective view for demonstrating a discharge circuit. 6 (A) and 6 (B) are perspective views showing a modification of the internal structure of the flow path switching valve of the present invention.

  The flow path switching valve of the present invention further includes, for example, a spring assembly and an air piston. The spring assembly presses the fluid supply unit toward the connecting unit, and the air piston The connecting portion may be rotatable between the fluid supply portion and the fluid take-out portion by releasing the pressure.

  In the flow path switching valve of the present invention, for example, the connecting portion may include a pinion gear, and may further include a rack piston that rotates the pinion gear and a pressing portion that presses the rack piston.

  In the flow path switching valve of the present invention, for example, the pressing portion may be a rack cylinder in which compressed air is enclosed.

  The flow path switching valve of the present invention further includes, for example, a leakage fluid discharge circuit and a packing, and the leakage fluid discharge circuit is connected to the fluid supply section and the connection when the flow path is switched by rotation of the connection section. The fluid leaking out of the flow path of the connecting part and the fluid take-out part is discharged from the ground surface of the connecting part and the ground face of the connecting part and the fluid take-out part to the outside of the valve. The discharge of leaking fluid may be assisted.

  In the flow path switching valve of the present invention, for example, the spring assembly may further include a ring plate straddling adjacent springs.

  In the flow path switching valve of the present invention, for example, the fluid take-out part is a flow path that has been released from communication with the connection part by flow path switching by rotation of the connection part among the plurality of flow paths. A residual pressure discharge circuit for discharging the internal residual pressure may be provided.

  Hereinafter, the flow path switching valve of the present invention will be described with reference to the drawings. The present invention is not limited or restricted by the following embodiments. In the following drawings, the same parts are denoted by the same reference numerals. In the drawings, for convenience of explanation, the structure of each part may be simplified as appropriate, and the dimensional ratio of each part may be schematically shown, unlike actual ones.

  FIG. 1 is a perspective view showing an example of the appearance of the flow path switching valve 1 of the present invention, and FIG. 2 is a perspective view showing an example of the internal structure of the flow path switching valve 1 shown in FIG. As shown in FIGS. 1 and 2, the flow path switching valve 1 includes a fluid supply unit 10, a fluid extraction unit 30, and a connection unit 20. The fluid supply unit 10 has a flow path 11. The fluid extraction unit 30 has two flow paths 31 and 32. In FIG. 2, two channels (channels 31 and 32) are exemplified for the fluid extraction unit 30, but the number of channels of the fluid extraction unit 30 may be plural, for example, three or more. Also good. The connecting unit 20 has a flow path 21 and connects the fluid supply unit 10 and the fluid extraction unit 30. The connecting portion 20 is rotatable, and the inlet (the upper opening in FIG. 2) of the flow passage 21 communicates with the outlet (the lower opening in FIG. 2) of the fluid supply portion 10 and the flow passage. The 21 outlet (lower opening in FIG. 2) communicates with any flow path (flow path 31 in FIG. 2) inlet (upper opening in FIG. 2) of the fluid extraction unit 30 and communicates by rotation. The flow path of the fluid extraction unit 30 can be switched. The fluid supply unit 10, the fluid extraction unit 30, and the connection unit 20 can be formed using, for example, stainless steel, but may be formed using a material other than stainless steel depending on the type of the fluid. Examples of the fluid include a viscous fluid such as a molten resin, a non-viscous fluid, and a gas, and are not particularly limited. When the fluid is, for example, a molten resin, a heater for maintaining the resin in a molten state may be embedded in the fluid supply unit 10, or the heater may be disposed outside the valve 1, 1 may be heated to maintain the resin in a molten state.

  Next, the basic design of the flow path switching valve 1 of the present invention will be described using the schematic diagram of FIG. In FIG. 3, for convenience of explanation, the valve 1 is simplified, a part of the fluid supply unit 10 is cut out, and the connection unit 20 is shown in a perspective view. As shown in FIG. 3, the outlet of the flow path 21 of the connecting portion 20 (the lower opening in FIG. 3) moves the flow path of the fluid extraction portion 30 communicating with the flow path 31 from the flow path 31 by the rotation of the connecting portion 20. It is possible to switch to 32. Thus, since the flow path switching valve 1 of the present invention has a simple flow path configuration formed by the flow path 21 of the connecting portion 20 and the flow paths 31 and 32 of the fluid take-out portion 30, the fluid easily flows. , Retention is suppressed. Therefore, for example, when the fluid is a molten resin, it is possible to suppress deterioration such as gelation of the molten resin in the flow path.

  As shown in FIG. 2, the flow path switching valve 1 of the present invention may further include a spring assembly 40 and an air piston 50. The spring assembly 40 presses the fluid supply unit 10 toward the connecting unit 20. The pressure of the pressing is not particularly limited, and is, for example, 70 MPa to 100 MPa. Although FIG. 1 illustrates the spring assembly 40 including 12 springs, the number of springs constituting the spring assembly 40 may be appropriately adjusted according to, for example, the pressing pressure. The air piston 50 loosens the pressure and enables the connecting portion 20 to rotate between the fluid supply portion 10 and the fluid take-out portion 30. With such a configuration, for example, when the flow path is switched by the rotation of the connecting portion 20, from the ground surface of the fluid supply unit 10 and the connecting portion 20 and the ground surface of the connecting portion 20 and the fluid take-out portion 30, The fluid leaking out of the flow path of the connecting part 20 and the fluid extracting part 30 can be kept in a very small amount.

  As shown in FIG. 1, the spring assembly 40 may include, for example, a ring plate 41 straddling adjacent springs. If the ring plate 41 is provided, for example, when the spring is broken, the components of the spring assembly 40 can be prevented from scattering to the surroundings. Although not shown, the spring assembly 40 may further include, for example, a wire lock for preventing the scattering.

  The means for rotating the connecting portion 20 is not particularly limited, and any means may be used. As shown in FIG. 2, for example, as shown in FIG. 2, the flow path switching valve 1 of the present invention includes a rack piston 23 having a pinion gear 22 as a rotating means, and a rack piston 23 that rotates the pinion gear 22. You may have the press part 24 which presses. The pressing part 24 is not particularly limited, and examples thereof include a rack cylinder (air booster) in which compressed air is sealed, a hydraulic cylinder, and the like. If the pressing portion 24 is the air booster, for example, the valve 1 can be further downsized. For example, as shown in FIG. 2, the flow path switching valve 1 of the present invention further includes a cross bar 26 for supporting the rack piston 23 and a pressing portion bracket 25 for supporting the pressing portion 24. May be.

  For example, as shown in FIG. 4, the connecting portion 20 may further include a second pinion gear 28 having a stopper 27. If the second pinion gear 28 is included, for example, when the flow path is switched by the rotation of the connecting portion 20, the connecting portion 20 is rotated until the rotation is stopped by the stopper 27. It is possible to reliably communicate with the flow path inlet of any flow path of the fluid extraction unit 30 and to prevent the flow path 21 outlet from being positioned between the flow path 31 inlet and the flow path 32 inlet.

  The magnitude | size of the flow-path switching valve 1 of this invention is not specifically limited, For example, length is 300 mm-1500 mm, 500 mm-1000 mm, 710 mm, and width is 50 mm-500 mm, 100 mm-400 mm, 330 mm. The height is 100 mm to 1500 mm, 200 mm to 1000 mm, and 300 mm. The weight of the flow path switching valve 1 is not particularly limited, and is, for example, 30 kg to 500 kg, 50 kg to 300 kg, and approximately 115 kg. When the cross-sectional shape of the flow path is a circle, the diameter is, for example, 5 mm to 200 mm, 20 mm to 150 mm, or 40 mm. When the cross-sectional shape of the flow path is a shape other than a circle such as a rectangle or an ellipse, the area of the circle having the above-described diameter may be approximately equal to the cross-sectional area of the flow path.

  For example, as shown in FIG. 5A, the flow path switching valve 1 of the present invention may further include a leakage fluid discharge circuit 60 and a packing 70. The leakage fluid discharge circuit 60 is connected to the connecting part 20 from the grounding surface between the fluid supply part 10 and the connecting part 20 and the grounding face between the connecting part 20 and the fluid take-out part 30 when the flow path is switched by the rotation of the connecting part 20. In addition, the fluid leaking out of the flow path of the fluid extraction unit 30 is discharged to the outside of the valve 1. The packing 70 assists the discharge of the leaked fluid. If it is such a structure, it can suppress that the inside of valve | bulb 1 becomes a high voltage | pressure by the fluid which leaked outside the flow path, for example. The material in particular of packing 70 is not restrict | limited, For example, according to the kind etc. of the said fluid, it can select suitably. As a specific example, when the fluid is a molten resin and the valve 1 is maintained at a high temperature such as 300 ° C., for example, a packing made of PTFE (polytetrafluoroethylene) can be used.

  In the flow path switching valve 1 of the present invention, for example, as shown in FIG. 5 (B), the fluid take-out section 30 is switched by the flow path switching by the rotation of the connecting section 20 among the plurality of flow paths 31 and 32. You may have the residual pressure discharge circuit 80 for discharging | emitting the internal residual pressure about the flow path by which communication with the connection part 20 was cancelled | released. If it is such a structure, it can suppress that the inside of the valve | bulb 1 becomes high pressure with the fluid which remained in the flow path from which communication with the connection part 20 was cancelled | released, for example.

  In the flow path switching valve 1 of FIG. 2, the flow paths 31 and 32 of the fluid take-out section 30 are each bent at approximately 90 ° from the inlet toward the outlet. In the flow path switching valve 1 of the present invention, the shapes of the flow paths 31 and 32 of the fluid take-out part 30 are not limited to this, and it is only necessary that the inlets of the respective flow paths can be communicated by the rotation of the connecting part 20. Examples of the shapes of the flow paths 31 and 32 of the fluid extraction unit 30 include shapes as shown in FIGS. 6 (A) and 6 (B). 6 is the same as FIG. 2 except that the shapes of the flow paths 31 and 32 of the fluid extraction unit 30 are different. FIG. 6A shows a form in which the flow paths 31 and 32 of the fluid extraction unit 30 bend approximately 45 ° from the inlet toward the outlet, respectively. FIG. 6B shows the flow of the fluid extraction unit 30. Each of the paths 31 and 32 has a substantially linear shape from the inlet toward the outlet.

  It is preferable that the flow path switching valve 1 of the present invention can be used in place of, for example, an existing flow path switching valve for an existing apparatus. The existing apparatus has, for example, a derivation unit for deriving fluid to the flow path switching valve and an introduction unit for introducing fluid from the flow path switching valve. For this reason, when the flow path switching valve 1 of the present invention is installed in the existing apparatus, for example, the inlet of the flow path 11 of the fluid supply section 10 is located at a location corresponding to the derivation section of the apparatus, It is only necessary that the outlets of the flow paths 31 and 32 of the fluid extraction unit 30 be positioned at locations corresponding to the introduction unit of the apparatus. As described above, the flow path switching valve 1 of the present invention only needs to be able to communicate with the respective inlets of the flow paths 31 and 32 of the fluid take-out part 30 by the rotation of the connecting part 20, so that By adopting a shape in which each outlet is located, it can be easily applied to the existing apparatus. As a specific example, for example, as shown in FIGS. 2, 6 (A) and (B), the flow angle of the flow paths 31 and 32 of the fluid take-out part 30 is changed to the shape of the apparatus. If adjusted accordingly, it can be easily applied to the existing apparatus.

  As described above, the channel switching valve of the present invention can be widely used for channel switching of various fluids such as a viscous fluid such as a molten resin, a non-viscous fluid, and a gas.

DESCRIPTION OF SYMBOLS 1 Flow path switching valve 10 Fluid supply part 11, 21, 31, 32 Flow path 20 Connection part 22 Pinion gear 23 Rack piston 24 Press part 25 Press part bracket 26 Crossbar 27 Stopper 28 Second pinion gear 30 Fluid extraction part 40 Spring assembly 41 Ring plate 50 Air piston 60 Leakage fluid discharge circuit 70 Packing 80 Residual pressure discharge circuit

Claims (7)

A fluid supply having a flow path;
A fluid outlet having a plurality of flow paths;
A connecting portion having a flow path and connecting the fluid supply portion and the fluid extraction portion;
Including
The connecting portion is
Is rotatable,
The channel inlet communicates with the channel outlet of the fluid supply unit,
The flow path outlet communicates with the flow path inlet of any flow path of the fluid take-out section, and the flow path of the fluid take-out section can be switched by rotation.
A flow path switching valve characterized by that. further,
A spring assembly,
An air piston,
Including
The spring assembly presses the fluid supply part toward the connecting part,
The air piston loosens the pressure and enables the connecting part to rotate between the fluid supply part and the fluid take-out part.
The flow path switching valve according to claim 1. The connecting portion has a pinion gear;
further,
A rack piston for rotating the pinion gear;
A pressing portion for pressing the rack piston;
including,
The flow path switching valve according to claim 1 or 2. The flow path switching valve according to claim 3, wherein the pressing portion is a rack cylinder in which compressed air is enclosed. further,
A leakage fluid discharge circuit;
Packing,
Including
The leakage fluid discharge circuit is configured such that, when the flow path is switched by rotation of the connecting portion, the connecting portion from the grounding surface of the fluid supply portion and the connecting portion, and the grounding surface of the connecting portion and the fluid outlet portion. And the fluid leaking outside the flow path of the fluid take-out part is discharged outside the valve,
The packing assists the discharge of the leaked fluid;
The flow path switching valve according to any one of claims 1 to 4. The flow path switching valve according to any one of claims 2 to 5, wherein the spring assembly includes a ring plate straddling adjacent springs. Among the plurality of flow paths, the fluid take-out section has a residual pressure for discharging the internal residual pressure with respect to the flow path that has been disconnected from the connection section by switching the flow path by rotation of the connection section. The flow path switching valve according to any one of claims 1 to 6, further comprising a discharge circuit.

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