Valve, intermittent discharge valve using the same, and intermittent coating device

Abstract

To provide a valve capable of preventing fluid such as coating liquid from flowing into an actuator, and preventing the fluid such as coating liquid from flowing into the actuator during maintenance.SOLUTION: A valve comprises: a valve body 10 comprising an inflow port 11 communicating with an internal space 18 serving as a fluid flow path, an outflow port 12, and a valve seat 17 formed at the outflow port; an actuator 40 that expands and contracts a drive shaft 42; a bracket 30 that couples the valve body and the actuator; and a stem 50 that protrudes from the bracket, and comprises a valve body 51 at one end that abuts and separates from the valve seat, and at the other end of which an adapter 70 coupled to the drive shaft is coupled. An annular diaphragm 60 has an inner peripheral edge 61 sandwiched between the stem and the adapter, and an outer peripheral edge 62 sandwiched between the valve body and the bracket.SELECTED DRAWING: Figure 3

Description

Technical Field

[0001] The present invention relates to a valve, an intermittent discharge valve using the same, and an intermittent coating device using the same.

Background Art

[0002] An intermittent coating device for intermittently coating a coating liquid or the like on a long web such as a film, a fabric, paper, a metal foil, or a metal mesh has been proposed. When intermittently coating a coating liquid on a metal foil used for an electrode member of a recent lithium ion battery or the like, high accuracy is required for the length of the uncoated section and the length of the coated section.

[0003] In the invention of the intermittent discharge valve described in Patent Document 1, a voice coil motor is used as an actuator for reciprocating a drive shaft. A voice coil motor is a single-phase motor in which only a coil reciprocates in a strong magnetic field created by an Nd-Fe-B magnet, and is widely used in industrial fields that require high-precision positioning and high-speed operation.

[0004] In a valve for performing intermittent coating, the number of times the valve opens and closes may reach several hundred thousand times per day, and it is necessary to disassemble and clean the valve for maintenance in a short period of several days to about one week.

Prior Art Documents

Patent Documents

[0005]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0006] In an intermittent discharge valve that uses an electric motor such as a voice coil motor as an actuator, if a fluid such as a coating liquid flows into the electric motor in the actuator, it may cause the valve to malfunction. In addition, since the valve is frequently disassembled and cleaned, it is necessary to prevent the fluid from flowing into the actuator not only during valve operation but also during disassembly and cleaning.

[0007] The present invention has been made in view of such a point, and its object is to provide a valve in which a fluid such as a coating liquid flowing through the valve does not flow into the actuator during valve operation, and in disassembly and cleaning maintenance, a fluid such as a coating liquid or a cleaning liquid does not flow into the actuator.

Means for Solving the Problems

[0008] The valve of the present invention (1) includes a valve body having an inlet, an outlet communicating with an internal space serving as a fluid flow path, and a valve seat formed at the outlet, an actuator that expands and contracts a drive shaft, a bracket that connects the valve body and the actuator, a stem that protrudes from the bracket and has a valve body at one end that contacts and separates from the valve seat and an adapter connected to the drive shaft at the other end, and an annular diaphragm, the inner peripheral edge of which is sandwiched between the stem and the adapter, and the outer peripheral edge of which is sandwiched between the valve body and the bracket.

[0009] In the valve of the present invention (1), since the valve body and the actuator are separated by the diaphragm, the fluid flowing through the valve does not flow into the actuator during valve operation. In addition, since it includes an actuator that expands and contracts a drive shaft, a bracket that connects the valve body and the actuator, and a stem that protrudes from the bracket and has a valve body at one end that contacts and separates from the valve seat and an adapter connected to the drive shaft at the other end, as will be described in FIG. 4 of the drawings attached to the specification of the present application, the cleaning liquid or the like does not flow into the actuator even during maintenance such as disassembly and cleaning.

[0010] The valve of the present invention (2) is such that the inner peripheral edge of the diaphragm is clamped by screwing the stem and the adapter, the outer peripheral edge of the diaphragm is clamped by a clamp for fixing the valve body and the bracket, the connection between the adapter and the drive shaft is made by screwing, and a window for rotating the adapter is formed on the outer periphery of the bracket. It is a valve of the present invention (1).

[0011] In the valve of the present invention (2), since the inner peripheral edge of the diaphragm is clamped by screwing the stem and the adapter, the outer peripheral edge of the diaphragm is clamped by a clamp for fixing the valve body and the bracket, and the connection between the adapter and the drive shaft is made by screwing, the structure is simple, so the manufacturing cost can be reduced. Since a window for rotating the adapter is formed on the outer periphery of the bracket, by applying a dedicated jig to this recess and rotating it, the screwing between the stem and the diaphragm can be loosened, and the clamping of the inner peripheral edge can be easily released, facilitating disassembly for maintenance.

[0012] The present invention (3) is a valve of the present invention (1), further comprising a first valve having a connection port communicating with an internal space serving as a fluid flow path, and a second valve which is a valve of the present invention (1) and whose inlet communicates with the connection port. It is an intermittent discharge valve having these.

[0013] In the present invention (3), by providing the first valve and the second valve, it is possible to provide an intermittent discharge valve that requires high-precision positioning and high-speed intermittent discharge.

[0014] The present invention (4) includes a die for applying a coating fluid to an object to be coated, a pump for pressure-feeding the coating fluid, the intermittent discharge valve of the present invention (3), a control unit for controlling the intermittent discharge valve, a pressure-feeding pipe communicating the outlet of the pump and the inlet of the first valve, a supply pipe communicating the outlet of the first valve and the inlet of the die, and a circulation pipe communicating the outlet of the second valve and the upstream stage of the pump. It is an intermittent coating apparatus having these.

[0015] In the present invention (4), there are provided a die for applying a coating fluid to a workpiece to be coated, a pump for pumping the coating fluid, an intermittent discharge valve of the present invention (3), a control unit for controlling the intermittent discharge valve, a pressure feed pipe communicating the outlet of the pump and the inlet of the first valve, a supply pipe communicating the outlet of the first valve and the inlet of the die, and a circulation pipe communicating the outlet of the second valve and the upstream stage of the pump. Therefore, high-precision positioning and high-speed intermittent discharge can be performed. Also, by closing the first valve and opening the second valve, the coating fluid can be returned to the upstream stage of the pump, preventing an increase in the hydraulic pressure of the pump and enabling uniform coating.

Effects of the Invention

[0016] According to the present invention, it is possible to provide a valve in which a fluid such as a coating liquid flowing through the valve during operation of the valve does not flow into the actuator, and in disassembling and cleaning maintenance, fluids such as a coating liquid and a cleaning liquid do not flow into the actuator.

Brief Description of the Drawings

[0017]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Embodiments for Carrying Out the Invention

[0018] Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. Note that the following embodiments are essentially preferred examples and are not intended to limit the scope of the present invention, its applications, or its uses.

[0019] Figure 1 is an overall perspective view of the valve 1 of the present invention. The valve 1 includes a valve body 10 and an actuator 40, and the valve body 10 and the actuator 40 are connected by a bracket 30.

[0020] The valve body 10 is provided with an inlet 11 having an inlet flange 14, an outlet 12, a connection port 13 having a connection port flange 15, and a detachable flange 16. The actuator 40 is provided with a housing 41, and a voice coil motor is built therein. A bracket flange 32 is formed at the upper part of the bracket 30, and the detachable flange 16 and the bracket flange 32 are fixed by a clamp 80 shown in FIG. 3. The bracket 30 and the actuator 40 are connected by bolts 34 via a bracket base 33. A window 31 is opened in the bracket 30.

[0021] Figure 2 is an overall front view of the valve shown in FIG. 1. Since all the parts with reference signs have been described in the description of FIG. 1, they are omitted here. For the drawings after FIG. 3, parts that have already been described will be partially omitted from the description.

[0022] Figure 3 is a partial cross-sectional view and a partial perspective view of the valve of the present invention. FIG. 3(A) is a detailed view showing the valve body 10, the bracket 30, and their interiors. FIG. 3(B) is a perspective view showing a cross-section of the connection part between the valve body 10 and the bracket 30. FIG. 3(C) is a perspective view showing the appearance of the connection part between the valve body 10 and the bracket 30. The valve body 10 has an internal space 18 inside, and the inlet 11 and the outlet 12 are communicated by the internal space 18. A valve seat 17 is formed in the outlet 12, and a valve body 51 that comes into contact with and separates from the valve seat 17 is formed at one end of a stem 50. A male screw portion 52 of the stem is provided at the other end of the stem 50.

[0023] The adapter first female thread portion 71 is provided at the stem side end of the adapter 70, and the stem male thread portion 52 and the adapter first female thread portion 71 are screwed together. The adapter second female thread portion 72 is provided on the actuator side of the adapter 70, and is screwed with the drive shaft male thread portion 43 provided at the end of the drive shaft 42.

[0024] The detachable flange 16 and the bracket flange 32 are clamped and fixed by the clamp 80. The diaphragm 60 is an annular resin diaphragm, the middle part is bent convexly on the adapter side, the inner peripheral edge 61 is clamped by the stem 50 and the adapter 70, and the outer peripheral edge 62 is clamped by the detachable flange 16 and the bracket flange 32. The stem side end of the adapter 70 is provided with a taper on the outer periphery, and the diaphragm is clamped between the inner taper formed corresponding to the taper and the stepped portion provided with the stem male thread 52 at the other end of the stem 50, preventing abnormal deformation of the diaphragm 60. An annular convex portion is provided on the outer peripheral edge of the diaphragm 60, which engages with a recess provided on the opposing surface of the bracket flange 32 with the detachable flange, preventing a decrease in seal caused by deformation of the valve. The detachable flange 16 and the bracket flange 32 are fixed by the clamp 80 shown in Fig. 3(D).

[0025] A window 31 is opened in the bracket 30, the adapter 70 can be seen through the window 31, and a recess 73 is formed on the outer surface of the adapter 70. This recess 73 is used for disassembling the valve 1 described with reference to Fig. 4.

[0026] Fig. 4 shows the procedure for disassembling the valve 1. Fig. 4(A) shows the state before the valve 1 is disassembled. Even if the valve 1 is operated in this state, since the valve body 10 and the actuator 40 are separated by the diaphragm 60, fluid does not flow into the actuator 40.

[0027] Remove the clamp that fixes the detachable flange 16 and the bracket flange 32 from the state of FIG. 4(A), loosen the screw engagement between the second female screw portion 72 of the adapter and the male screw portion 43 of the drive shaft, and separate the adapter 70 and the drive shaft 42 to obtain FIG. 4(B). The screw engagement can be loosened by pushing a dedicated tool (not shown) into the recess 73 of the adapter 70 from the window 31 and rotating it. In this state, since the valve body 10 and the actuator 40 are separated by the diaphragm 60, fluid does not flow into the actuator 40.

[0028] From the state of FIG. 4(B), loosen the first female screw portion 71 of the adapter and the male screw portion 52 of the stem, separate the adapter 70 and the stem 50, and remove the diaphragm 60 to obtain FIG. 4(C). In this state, the removed diaphragm 60 can be replaced, and the valve body 10 and the stem 50, which are fluid-connecting members, can be disassembled and cleaned.

[0029] FIG. 5 is a diagram showing an intermittent discharge valve 100 and an intermittent coating device 110 using the valve of the present invention. FIG. 5(A) is a diagram of the intermittent discharge valve 100 used in the intermittent coating device 110. The intermittent discharge valve 100 is formed by connecting a first valve 101 and a second valve 102. The structures of the first valve 101 and the second valve 102 are the same except that the first valve 101 is a three-way valve and the second valve 102 is a two-way valve. The first valve 101 has a connection port 13, but the right end of the second valve 102 does not have a connection port 13 and fluid does not flow out.

[0030] When the first valve 101 is in the open state, the second valve 102 is in the closed state. When the first valve 101 is in the closed state, the second valve 102 is in the open state. In this way, the pressure inside the internal space 18 does not fluctuate much. When a voice coil motor is used for the actuator 40, fluid can be discharged at high speed with high positioning accuracy.

[0031] Fig. 5(B) shows the intermittent coating device 110. The part surrounded by the dotted line in the figure is the intermittent discharge valve 100 shown in Fig. 5(A). The coating fluid 108 stored in the coating fluid storage tank 107 is introduced into the pump 103 through the pipe 109, pressurized to a certain pressure, and introduced into the inlet 11 of the first valve 101 through the pressure feed pipe 109A. When the first valve 101 is in the open state, it is sent from the outlet 12 of the first valve 101 to the die 104 through the supply pipe 109B and is coated on the workpiece 106 wound up by the roll 105. At this time, the coating fluid 108 also enters the second valve 102, but the second valve is in the closed state.

[0032] When the first valve 101 is in the closed state, the second valve 102 is in the open state, and the coating fluid 108 passes through the circulation pipe 109C from the outlet 12 of the second valve 102 and is sent back to the front stage of the pump 103. As a result, the pressures in the internal space 18 of the first valve 101 and the internal space 18 of the second valve 102 are not affected much by the change in the open / closed state, so the coating fluid 108 is stably discharged from the outlet 12 of the first valve 101, and a nearly uniform coating can always be performed.

Industrial Applicability

[0033] As described above, this valve can be suitably used for an intermittent discharge valve and an intermittent coating device.

Explanation of Reference Numerals

[0034] 1 Valve 10 Valve Body 11 Inlet 12 Outlet 13 Connection Port 14 Inlet Flange 15 Connection Port Flange 16 Detachable Flange 17 Valve Seat 18 Internal Space 30 Bracket 31 Window 32 Bracket Flange 33 Bracket Base 34 bolts 40 actuator 41 housing 42 drive shaft 43 male thread of drive shaft 50 stem 51 valve body 52 male thread of stem 60 diaphragm 61 inner peripheral edge 62 outer peripheral edge 70 adapter 71 first female thread of adapter 72 second female thread of adapter 73 recess 80 clamp 100 valve for intermittent discharge 101 first valve 102 second valve 103 pump 104 die 105 roll 106 workpiece to be coated 107 coating fluid storage tank 108 coating fluid 109 pipe 109A pressure feed pipe 109B supply pipe 109C circulation pipe 110 device for intermittent coating

Claims

1. A valve comprising a valve body having an inlet, an outlet communicating with an internal space serving as a fluid flow path, and a valve seat formed at the outlet; an actuator for expanding and contracting a drive shaft; a bracket connecting the valve body and the actuator; a stem protruding from the bracket, having a valve body at one end that contacts and separates from the valve seat, and an adapter connected to the drive shaft at the other end; an annular diaphragm, the inner peripheral edge of which is clamped between the end of the stem and the end of the adapter, and the outer peripheral edge of which is clamped between the valve body and the bracket; A valve having the above components.

2. The inner peripheral edge of the diaphragm is clamped by screwing the stem and the adapter, the outer peripheral edge of the diaphragm is clamped by a clamp that fixes the valve body and the bracket, and the connection between the adapter and the drive shaft is made by screwing. The valve according to claim 1, wherein a window for rotating the adapter is formed on the outer periphery of the bracket.

3. A valve according to claim 1 or 2, further comprising a first valve having a connection port communicating with an internal space serving as a fluid flow path; a second valve which is the valve according to claim 1 or 2; An intermittent discharge valve in which the inlet of the second valve is connected to communicate with the connection port.

4. A die for coating a workpiece with a coating fluid; a pump for pumping the coating fluid; the intermittent discharge valve according to claim 3; a control unit for controlling the intermittent discharge valve; a pressure feed pipe communicating the outlet of the pump and the inlet of the first valve; a supply pipe communicating the outlet of the first valve and the inlet of the die; a circulation pipe communicating the outlet of the second valve and the upstream stage of the pump; An intermittent coating apparatus having the above components.

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