JP2013053728A - Valve device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To even out fluctuation in flow rate of fluid output from a plurality of output ports to stabilize the flow rate.SOLUTION: The valve device includes: a first member 30 having a single input port 40 to which fluid is supplied and the plurality of output ports 42 from which the supplied fluid is discharged; a second member 32 integrally connected with the first member 30 and having an air supply port 50 to which pilot air is supplied; and a valve element 38 sandwiched between the first member 30 and the second member 32 and made of a flexible member. The plurality of output ports 42 are arranged to be spaced from the center of the input port 40 at equal spacings, and groove parts 56 are formed to an inner wall of the second member 32 to be radially extended and communicate with the air supply port 50.

Description

  The present invention relates to a valve device that opens and closes a fluid flow passage, and more particularly to a valve device that can discharge the same amount of fluid simultaneously from a plurality of output ports when the valve is open.

  For example, Patent Document 1 discloses a control valve that opens and closes a fluid flow path by operating a valve body. This control valve has a valve body whose peripheral portion is supported by a hollow valve case, and the valve body is attached to a disk spring having a thin plate substantially dish shape and a circular hole formed in the center part of the disk spring. A sealing member for closing the circular hole.

Japanese Patent Publication No.58-17910

  By the way, for example, when a release agent (fluid) is applied from a plurality of nozzles toward the mold, it is necessary to discharge the same amount of the release agent simultaneously from the plurality of output ports. In such a case, for example, a plurality of output ports may be provided in the valve case of the control valve disclosed in Patent Document 1, and fluids may be discharged from the plurality of output ports to the plurality of nozzles, respectively.

  However, as shown in FIG. 8, a plurality of output ports 2A closest to a single input port 1 and an output port 2F farthest from the input port 1 may have a plurality of pressures due to a fluid discharge pressure difference. Variation occurs in the flow rate of the fluid discharged from the output ports 2A to 2F.

  The present invention has been made in view of the above points, and provides a valve device capable of eliminating the variation in the flow rate of fluid output from a plurality of output ports and achieving stabilization of the flow rate. Objective.

  To achieve the above object, the present invention provides a first member having a single input port to which a fluid is supplied and a plurality of output ports for discharging the supplied fluid, and is integrated with the first member. A second member having an air supply port to which pilot air is supplied, and a valve body sandwiched between the first member and the second member and made of a flexible member, The plurality of output ports are arranged at equal intervals from the center of the input port.

  According to the present invention, the separation intervals between a single input port and a plurality of output ports are set equal to each other, so that the flow rate of fluid discharged from each output port can be made uniform. As a result, in the present invention, variations in the flow rate of the fluid discharged from the plurality of output ports can be eliminated, and the flow rate can be stabilized.

  Moreover, according to this invention, a manufacturing process is simplified and it manufactures simply by comprising by the simple structure of couple | bonding a 1st member and a 2nd member integrally with a valve body in between. Maintenance performance can be improved.

  Furthermore, according to the present invention, the distance between the single input port and the plurality of output ports is set to be equal to each other, so that the communication path connecting the input port and each output port can be set widely. The occurrence of clogging such as dust in the communication path can be suitably avoided.

  Further, the present invention is characterized in that the valve body is made of a flat plate and is attached in close contact with a valve seat formed on an inner wall of the first member.

  According to the present invention, the valve closed state in which the valve body is seated on the valve seat can be reliably and stably held by attaching the valve body in close contact with the valve seat. As a result, in the present invention, when the valve is closed, for example, it is possible to suitably avoid that the valve body is separated from the valve seat and the fluid is ejected from the output port.

  Furthermore, the present invention is characterized in that an air discharge passage extending along a radial direction and communicating with the air supply port is provided on the inner wall of the second member. In this case, the air discharge channel may be formed by a plurality of grooves extending radially around the air supply port.

  According to the present invention, for example, when the valve body is switched from the valve closed state to the valve open state, a part of the pilot air confined in the pilot chamber can be discharged through the air discharge passage (groove portion). . As a result, in the present invention, when the valve body is switched, it is possible to suitably avoid the state where the pilot air cannot be completely removed, and to stabilize the flow rate.

  Still further, according to the present invention, a closed pilot chamber is formed between the valve body and the second member, and the pilot air supplied into the pilot chamber is rapidly exhausted to the air supply port. An exhaust valve is provided.

  According to the present invention, when the supply of pilot air is stopped, the pilot air remaining in the pilot chamber is not returned to the pilot air supply source side, but is exhausted to the outside (in the atmosphere) through the exhaust port of the quick exhaust valve. can do. As a result, in the present invention, the switching operation of the valve body is performed instantaneously, and the response speed of the valve body can be improved.

  According to the present invention, it is possible to obtain a valve device that can eliminate variations in the flow rate of fluid output from a plurality of output ports and achieve stabilization of the flow rate.

It is a block diagram of the mold release agent application | coating system with which the valve apparatus which concerns on embodiment of this invention was integrated. It is a disassembled perspective view of the valve apparatus shown in FIG. (A) is an arrow view seen from arrow IIIa direction of FIG. 2, (b) is a side view seen from arrow IIIb direction of FIG. It is a longitudinal cross-sectional view along the IV-IV line of FIG. It is a longitudinal cross-sectional view which shows operation | movement of the said valve apparatus, (a) shows a valve closed state, (b) has shown the valve open state. (A) is explanatory drawing of the comparative example in which the groove part is not provided, (b) is explanatory drawing of the groove part provided in the valve apparatus which concerns on this embodiment. (A), (b) is a longitudinal cross-sectional view of the valve apparatus which concerns on other embodiment of this invention. In prior art, it is explanatory drawing which shows the dispersion | variation in the flow volume of the fluid discharged from the said several output port when several output port is formed.

  Next, embodiments of the present invention will be described in detail with reference to the drawings as appropriate. FIG. 1 is a configuration diagram of a release agent coating system in which a valve device according to an embodiment of the present invention is incorporated.

  As shown in FIG. 1, the release agent application system 10 sucks and sends out, for example, a storage tank 14 in which a water-soluble release agent 12 is stored and a release agent 12 in the storage tank 14. The pump unit 16, regulators 18 a and 18 b that adjust the pressure of the release agent 12 sucked from the storage tank 14 to a desired pressure, the valve device 20 according to the present embodiment, and the valve device 20 And a plurality of nozzles 24 for applying the release agent 12 toward the molding surface in the mold 22.

  2 is an exploded perspective view of the valve device shown in FIG. 1, FIG. 3 (a) is an arrow view seen from the direction of arrow IIIa in FIG. 2, and FIG. 3 (b) is a side view seen from the direction of arrow IIIb in FIG. 4 and 4 are longitudinal sectional views taken along the line IV-IV in FIG.

  As shown in FIG. 2, the valve device 20 according to the present embodiment includes a valve body 36 in which a first member 30 and a second member 32 are integrally coupled via a bolt 34, and the first member 30. It is sandwiched between the second member 32 and is constituted by a valve body 38 made of a flexible member such as rubber.

  The 1st member 30 consists of a disk-shaped member, and the single input port 40 is formed in the center part. A plurality (six in this embodiment, corresponding to the number of the nozzles 24) of output ports 42 are formed at portions spaced radially from the center of the input port 40 at equal intervals. In other words, the virtual line S connecting the centers of the plurality of output ports 42 is formed as a single circle centered on the single input port 40 as shown in FIG. In addition, the six output ports 42 are arranged in an arc shape with an equal angular separation along the circumferential direction. In this case, the single input port 40 and the six output ports 42 are respectively arranged on one side surface (on the same plane) of the circular shape of the first member 30.

  In the present embodiment, an example in which a plurality of output ports 42 are arranged is shown in FIG. 3B. However, the present invention is not limited to this, and the plurality of output ports 42 are arranged from the center of the input port 40. What is necessary is just to arrange | position at equal intervals. Further, the plurality of output ports 42 may be arranged such that the separation angles along the circumferential direction are different from each other.

  As shown in FIG. 1, the single input port 40 is connected to the pump unit 16 via a conduit 44 a such as a tube, and the release agent 12 is supplied from the pump unit 16. The plurality of output ports 42 are connected to the plurality of nozzles 24 via a plurality of pipes 44b such as tubes, and the release agent 12 discharged from each output port 42 is transferred from each nozzle 24 into the mold 22. It is applied toward the molding surface.

  As shown in FIG. 3A, a valve seat 46 on which the valve body 38 is seated is formed on the inner wall of the first member 30, and the valve seat 46 has a flat surface. In this case, the valve body 38 is attached in a state of being seated (closely contacted) with the valve seat 46 in a normal time when pilot air is not supplied, and communication between the single input port 40 and the plurality of output ports 42 is blocked. It consists of a normally closed type valve.

  Further, as shown in FIGS. 3A and 4, a circular concave portion 48 corresponding to the thickness and the outer diameter shape of the valve body 38 is formed on the inner wall of the first member 30.

  Returning to FIG. 2, the second member 32 is a disk-shaped member, and an air supply port 50 to which pilot air is supplied from a pilot air supply source (not shown) is provided at the center. The air supply port 50 faces the input port 40 on the first member 30 side, and is arranged coaxially.

  As shown in FIG. 4, an annular recess 52 having a diameter smaller than the outer diameter of the valve body 38 is formed on the inner wall of the second member 32, and the inner wall of the valve body 38 and the second member 32 is formed by the annular recess 52. A pilot chamber 54 is formed between the two. In this case, the pilot air supplied from the air supply port 50 is introduced into the pilot chamber 54 and pressed in the direction in which the valve body 38 is seated toward the valve seat 46 by the action of the pilot air pressure.

  In addition, a plurality of groove portions 56 that communicate with the air supply port 50 and extend radially outward from the air supply port 50 are formed on the inner wall of the second member 32 facing the pilot chamber 54 ( (See FIG. 2). The plurality of grooves 56 are air discharge passages for discharging pilot air remaining in a part of the pilot chamber 54 from the pilot chamber 54 when the valve body 38 is displaced and switched from the valve closed state to the valve open state. It functions as. This will be described in detail later.

  The release agent coating system 10 in which the valve device 20 according to the present embodiment is incorporated is basically configured as described above. Next, the operation and effects thereof will be described.

FIG. 5 is a longitudinal sectional view showing the operation of the valve device, where (a) shows the valve closed state and (b) shows the valve open state.
As shown in FIG. 5A, pilot air from a pilot air supply source (not shown) is introduced into the pilot chamber 54 through the air supply port 50, and the valve body 38 is moved to the valve seat 46 by the action of this pilot air. A force (see arrow) pressing toward the side is generated. In this case, the release agent 12 fed from the pump unit 16 is supplied from the input port 40, but the pilot air pressure (pilot pressure) is greater than the supply pressure of the release agent 12 supplied to the input port 40. Therefore, the valve body 38 is held in the valve closed state in which the valve body 38 is seated on the valve seat 46. As a result, the communication between the single input port 40 and the plurality of output ports 42 is blocked, and the supply of the release agent 12 from the plurality of output ports 42 to the nozzle 24 side is stopped.

  Subsequently, as shown in FIG. 5B, when a shutoff valve (not shown) is operated to stop the supply of pilot air to the air supply port 50, the force that presses the valve body 38 toward the valve seat 46 side. In contrast, when the supply pressure of the release agent 12 supplied to the input port 40 is overcome, the valve body 38 bends and separates from the valve seat 46. When the valve body 38 is separated from the valve seat 46, a clearance (communication path) is generated between the valve body 38 and the valve seat 46, and the single input port 40 and the input port 40 are connected via the clearance. A plurality of output ports 42 arranged on the outer peripheral side communicate with each other.

  Accordingly, the single input port 40 and the plurality of output ports 42 communicate with each other, and the release agent 12 is supplied from the plurality of output ports 42 toward the nozzles 24. As a result, the same amount of release agent 12 is applied simultaneously from each nozzle 24 toward the molding surface of the mold 22.

Next, the function and effect of the groove 56 provided on the inner wall of the second member 32 will be described.
FIG. 6A is an explanatory view of a comparative example in which no groove is provided, and FIG. 6B is an explanatory view of the groove provided in the valve device according to the present embodiment. In addition, in the comparative example shown by Fig.6 (a), except the groove part 56, it is comprised similarly to the valve apparatus 20 which concerns on this embodiment, and attaches | subjects the same referential mark to the same component, and is the following. explain.

  In the comparative example, as shown in FIG. 6A, when the valve body 38 is switched from the valve closed state to the valve open state, the pilot chamber is in contact with the valve body 38 that contacts the inner wall of the second member 32. There is a possibility that a part of 54 is blocked, and pilot air (see the halftone dot portion) that does not completely escape into a part of the blocked pilot chamber 54 remains. The pilot air remaining in the pilot chamber 54 has a problem that when the valve body 38 bends and comes into contact with the inner wall of the second member 32, there is no escape path and the air cushion acts to hinder the operation of the valve body 38. Will occur.

  On the other hand, in this embodiment, as shown in FIG. 6B, by forming a groove portion 56 that communicates with the air supply port 50 disposed in the center portion, the valve body 38 is removed from the valve closed state. Even when the pilot chamber 54 is closed between the valve body 38 that contacts the inner wall of the second member 32 when the valve is switched to the open state, the groove 56 communicates with the air supply port 50. Pilot air can be suitably released.

  Thus, in this embodiment, by providing the groove portion 56 that functions as a pilot air escape path, the pilot air filled in the pilot chamber 54 is completely discharged (disengaged) when the valve state of the valve body 38 is switched. And the occurrence of the above-mentioned problems can be suitably avoided.

  The length and depth in the radial direction of the groove portion 56 are set as appropriate in relation to the capacity of the pilot chamber 54 and the amount of pilot air that escapes from the pilot chamber 54.

  In the present embodiment, the separation intervals between the single input port 40 and the plurality of output ports 42 are set to be equal, so that the flow rate of the release agent (fluid) discharged from each output port 42 is made uniform. be able to. Therefore, in this embodiment, it is possible to eliminate the variation in the flow rate of the release agent discharged from the plurality of output ports 42 and to stabilize the flow rate. As a result, in this embodiment, the release agent is discharged from each nozzle 24 simultaneously and in the same amount toward the molding surface of the mold, thereby making the film thickness applied to the mold 22 uniform and stable. Can be planned.

  Further, in the present embodiment, since the first member 30 and the second member 32 are integrally coupled with the valve body 38 therebetween, the manufacturing process is simplified and simplified. It can be manufactured and maintenance performance can be improved.

  Further, in the present embodiment, the clearances (communication paths) that allow the input port 40 and the output ports 42 to communicate with each other are set by setting the separation intervals of the single input port 40 and the plurality of output ports 42 equal to each other. It can be set widely, and generation | occurrence | production of clogging of dust etc. in a clearance can be avoided suitably.

  Furthermore, in the present embodiment, the valve body 38 is attached in close contact with the valve seat 46, so that the valve closed state in which the valve body 38 is seated on the valve seat 46 is reliably and stably maintained. be able to. As a result, in the present embodiment, for example, when the valve is closed, it is possible to suitably avoid, for example, that the valve body 38 is separated (displaced) from the valve seat 46 and the fluid is ejected from the output port 42.

Next, a valve device 20a according to another embodiment of the present invention is shown in FIG.
The valve device 20a according to the other embodiment is characterized in that a quick exhaust valve 60 that instantaneously exhausts pilot air supplied into the pilot chamber 54 is provided in the air supply port 50.

  That is, when the supply of pilot air is stopped and the valve body 38 is switched from the valve closed state (see FIG. 5A) to the valve open state (see FIG. 5B), it remains in the pilot chamber 54. The pilot air can be exhausted to the outside (in the atmosphere) through the exhaust port of the quick exhaust valve 60 without returning to the pilot air supply source side (not shown).

  As a result, by providing the quick exhaust valve 60, the switching operation from the valve closed state to the valve open state of the valve body 38 is instantaneously performed, and the response speed of the valve body 38 can be improved. As the quick exhaust valve 60, for example, a diaphragm type or a plunger valve type may be used.

  In addition, since the other effect is the same as the valve apparatus 20 which concerns on the said embodiment, the detailed description is abbreviate | omitted.

20, 20a Valve device 30 First member 32 Second member 38 Valve body 40 Input port 42 Output port 46 Valve seat 50 Air supply port 54 Pilot chamber 56 Groove 60 Quick exhaust valve

Claims (5)

A first member having a single input port to which a fluid is supplied and a plurality of output ports for discharging the supplied fluid;
A second member integrally connected to the first member and having an air supply port to which pilot air is supplied;
A valve body sandwiched between the first member and the second member and made of a flexible member;
With
The valve device, wherein the plurality of output ports are arranged at equal intervals from the center of the input port. The valve device according to claim 1, wherein
The said valve body consists of a flat plate body, and is attached in the state closely_contact | adhered with respect to the valve seat formed in the inner wall of the said 1st member. The valve device according to claim 1 or 2,
The valve device according to claim 1, wherein an air discharge passage that extends along a radial direction and communicates with the air supply port is provided on an inner wall of the second member. The valve device according to claim 3,
The valve device according to claim 1, wherein the air discharge channel includes a plurality of grooves extending radially around the air supply port. The valve device according to any one of claims 1 to 4,
A closed pilot chamber is formed between the valve body and the second member,
The air supply port is provided with a quick exhaust valve for exhausting pilot air supplied into the pilot chamber to the outside.

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