JPH066846U - Exhaust valve - Google Patents

Abstract

(57) [Summary] [Purpose] To prevent impurities such as water droplets from flowing into external devices. [Structure] A first port 16 to which fluid is supplied from the outside,
A second port 18 for supplying the fluid supplied from the first port 16 to an external device; a third port 20 communicating with the first and second ports 16 and 18 for discharging the fluid to the outside; A valve body 28 that is elastically deformed or displaced by pressure, and the valve body 28 includes the first port 16
When the fluid supplied from the elastically deforms or displaces under a predetermined pressure or more, the first and third ports 16 and 2
The passage between 0 and 0 is closed, and the passage between the first and second ports 16 and 18 is communicated.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to an exhaust valve, more specifically, an exhaust valve capable of switching from a discharge state to a supply state of an external device when the pressure of the supplied fluid exceeds a predetermined pressure. Regarding

[0002]

[Prior art]

 Generally, an actuator is used to convey a work, etc., and in order to drive a cylinder device that is this actuator, a fluid supply source, a switching valve, a flow control valve, etc. are connected by piping to form a fluid pressure circuit. .

[0003]

[Problems to be solved by the device]

 By the way, when the piston of the cylinder device reciprocates, the adiabatic expansion action of the fluid discharged from one side of the piston chamber causes water droplets to be generated in the middle of the pipe, and the water droplets flow into the piston chamber and remain there. is there. The water droplets retained in the piston chamber become a load when the piston reciprocates, and cause malfunction of the cylinder device.

Therefore, as means for solving the above-mentioned problems, for example, it is conceivable to reduce the pipe volume, lower the driving pressure of the cylinder device, lower the dew point of air, and the like. However, in the above, the mounting position of the cylinder device differs depending on the installation environment, and it may be difficult to shorten the length of the pipe to the cylinder device, and there is the inconvenience that the pipe volume cannot be reduced. In the above, there is a problem that the thrust of the piston is reduced by reducing the driving pressure of the cylinder device. In the above, there is a problem that equipment such as a dryer is required to lower the dew point of air, for example, to lower the humidity.

On the other hand, it can be considered that an exhaust valve according to the related art is arranged near the cylinder device and the fluid in the piston chamber is rapidly discharged through the exhaust valve. However, even in this case, although the exhaust valve can reduce the amount of water droplets generated in the middle of the piping of the fluid pressure circuit that flow into the piston chamber, it does not completely prevent the water droplet from flowing into the piston chamber. There is an inconvenience that it cannot be prevented.

The present invention has been made to solve this type of problem, and it is an object of the present invention to provide an exhaust valve capable of preventing impurities such as water droplets from flowing into an external device. To aim.

[0007]

[Means for Solving the Problems]

 In order to achieve the above object, the present invention provides a first port to which a fluid is supplied from the outside and the fluid supplied from the first port to an external device, or A second port to which a fluid is supplied from an external device; a third port that communicates with the first and second ports and discharges the fluid to the outside; disposed between the first to third ports And a valve body that is elastically deformed or displaced by fluid pressure. The valve body communicates between the first and third ports when the pressure of the fluid supplied from the first port is equal to or lower than a predetermined pressure. When the fluid supplied from the first port is elastically deformed or displaced by a pressure higher than a predetermined pressure, the passage between the first and third ports is closed and the first and second ports are closed. Connect the passage between the When the elastic deformation or displacement by the pressure of fluid supplied to the port, and wherein the communicating passage between the between the second and third port or the first and second ports.

[0008]

[Action]

 In the exhaust valve according to the present invention, when the valve body is elastically deformed or displaced at a pressure higher than a predetermined pressure of the fluid supplied from the first port, the passage between the first and third ports is closed and A passage between the first and second ports communicates. On the other hand, when the valve body is elastically deformed or displaced by the pressure of the fluid supplied from the external device to the second port, the passage between the second and third ports or the passage between the first and second ports is formed. Communicate. Therefore, the fluid containing moisture supplied from the first port is discharged from the third port until a predetermined pressure is reached, and after reaching a predetermined pressure, the fluid containing no moisture is discharged from the first port to the outside. It is possible to supply to the second port side connected to the device.

[0009]

【Example】

 An exhaust valve according to the present invention will be described in detail below with reference to the accompanying drawings with reference to an embodiment.

1 and 2 are longitudinal sectional views of an exhaust valve 10 according to a first embodiment of the present invention.

The exhaust valve 10 has a first port 16 and a second port 18 which are provided at both ends of a cylindrical body 12 and which are provided with a one-touch type pipe joint 14 which will be described later, and which are substantially aligned in the axial direction. A third port 20 that substantially functions as an exhaust port is defined on an upper surface of the body 12 at a substantially central portion thereof, and the third port 20 extends downward from the third port 20 and the first port 16 described above is formed. The hole 22 is provided between the second port 18 and the second port 18.

A guide member 26 having a substantially cylindrical shape and having a seat portion 24 (see FIG. 2) is fitted into the hole portion 22, and a valve body 28 that abuts on the seat portion 24 is provided on the guide member 26. Has been. A recess 32 is formed on the upper surface of the valve body 28 so as to be inclined toward the through hole 30 defined in the substantially central portion, and the outer peripheral surface of the valve body 28 is expanded outward to increase the diameter. It has a sliding contact portion 34 that is in sliding contact with the inner peripheral surface of the member 26. On the other hand, a seat ring 38 which is fitted into the guide member 26 via a ring-shaped seal member 36 is provided above the valve body 28 at a predetermined distance. The seat ring 38 has a plurality of through holes 42 that communicate with the third port 20 via the silencer element 40. A hole 44 communicating with the second port 18 is defined on the peripheral surface of the guide member 26 near the valve body 28. The silencer element 40 is fixed by a wire mesh member 45 arranged on the upper surface thereof.

The one-touch type pipe joint 14 is provided with a fluid supply source (not shown) on the side of the first port 16 or an external device on the side of the second port 18 to supply a fluid, for example, one end of a tube made of vinyl or the like. Is formed so that it can be inserted. Specifically, the one-touch type pipe joint 14 has a release bush 46, and a guide member 48, a chuck member 50, and a seal member 52 are sequentially arranged outside the release bush 46. An annular seal member 52 having an inner peripheral surface inclined at a predetermined angle is arranged on the bottom surfaces of the holes of the first and second ports 16 and 18, and a spacer 54 is arranged close to the seal member 52. It is set up.

The chuck member 50 is a ring-shaped elastic metal flat plate, and has a plurality of slits formed on its side surface at equal intervals. An inwardly bent claw portion 56 is formed, and the claw portion 56 is sharpened toward the tip. The guide member 48 has a circling concave portion, and the concave portion is fitted into the tip end portion of the body 12 and abuts on the side surface portion of the chuck member 48. The release bush 46 is formed in a substantially cylindrical shape, and an edge 58 is formed at the tip end thereof so as to contact the claw portion 56 of the chuck member 50 at the time of mounting, and slits (not shown) are equally spaced on the side surface. Is defined in multiple.

The exhaust valve 10 according to the first embodiment of the present invention is basically constructed as described above. Next, the operation of incorporating the exhaust valve 10 into the meter-in circuit 60 will be described. This will be described with reference to FIG. Reference numerals 10a and 10b are exhaust valves having the same structure as the exhaust valve 10, and the description of the constituent elements will be made with reference to FIGS. 1 and 2. The meter-in circuit 60 is configured so that the air from the compressed air supply source 62 is switched by the switching valve 64 and is supplied to the cylinder 68 via the exhaust valves 10a and 10b and the flow rate control valves 66a and 66b.

First, the tip of a vinyl tube or the like communicating with the switching valve 64 is inserted into the first port 16 of the exhaust valve 10a. After inserting the vinyl tube lightly after inserting it to the bottom of the hole of the first port 16, the claw portion 56 of the chuck member 50 of the one-touch fitting 14 is inserted into the vinyl tube, Prevent the removal of. Therefore, the vinyl tube and the first port 16 are surely connected. Similarly, the second port 18 is also connected to the vinyl tube communicating with the flow control valve 66a. Note that the exhaust valve 10b is also pipe-connected in the same manner.

After the above work, first, compressed air is supplied from the compressed air supply source 62 to the exhaust valve 10a via the switching valve 64. The compressed air flowing in from the first port 16 of the exhaust valve 10a reaches the hole 22 and is introduced into the through hole 30 of the valve body 28 from the bottom side of the guide member 26. The compressed air passing through the through hole 30 of the valve body 28 passes through the silencer element 40 through the through hole 42 of the seat ring 38 and is discharged from the third port 20. In this case, as shown in FIG. 1, since the valve body 28 is in contact with the seat portion 24 of the guide member 26, the compressed air supplied from the first port 16 is directed to the second port 18 side. Outflow is blocked and is preferably discharged through the third port 20.

In this way, the initial compressed air containing a large amount of water in the conduit such as the vinyl tube is discharged from the third port 20 communicating with the first port 16.

Further, when the pressure of the compressed air reaches the set pressure in the state where the compressed air is discharged from the third port 20, the valve body 28 is separated from the seat portion 24 as shown in FIG. As the valve body 28 is opened, the recess 32 formed in the upper surface portion of the valve body 28 elastically deforms, and the upper surface portion of the valve body 28 comes into close contact with the bottom surface portion of the seat ring 38. Therefore, the through hole 30 defined in the central portion of the valve body 28 is closed by the bottom surface portion of the seat ring 38, and the compressed air passes through the hole portion 44 defined in the peripheral surface portion of the guide member 26 to the first position. It is led to the 2 port 18 side. As a result, the valve body 28 switches from the communication state of the first port 16 and the third port 20 to the communication state of the first port 16 and the second port 18. The compressed air derived from the second port 18 of the exhaust valve 10a is supplied to one piston chamber 70a of the cylinder 68 via the flow control valve 66a. The compressed air supplied to the piston chamber 70a does not contain any water because the compressed air containing a large amount of water has already been discharged from the third port 20 during the piping of the vinyl tube. Therefore, it is possible to prevent water from staying in the piston chamber 70a of the cylinder 68.

Next, by supplying compressed air into the one piston chamber 70a, the piston 72 of the cylinder 68 is displaced, and the air is exhausted from the other piston chamber 70b via the flow control valve 66b. It reaches the second port 18 of the valve 10b. In the exhaust valve 10b, the sliding contact portion 34 of the valve element 28 is separated from the inner peripheral surface of the guide member 26 by the pressure of air introduced through the hole 44 defined in the peripheral surface portion of the guide member 26, The valve body 28 is displaced inward and the valve body 28 is pushed down toward the seating portion 24. As a result, the air sent out from the other piston chamber 70b is discharged from the third port 20 through the through hole 42 of the seat ring 38, and at the same time, the air passing through the valve body 28 is formed in the substantially central portion thereof. From the hole 30, it passes through the first port 16 and is discharged to the atmosphere open side of the switching valve 64.

In the valve body 28 according to the present embodiment, the depression 32 is formed in the upper surface of the valve body 28, and the valve body 28 is elastically deformed by receiving a pressure equal to or higher than a predetermined pressure. 28 is displaced upward and the valve body 28 is opened. However, as shown in FIGS. 4 (A) to 4 (F), a recess 74 is provided in the peripheral portion of the bottom surface of the seat ring 38, The valve body 76 may be elastically deformed along the recess 74 by receiving a pressure equal to or higher than a predetermined pressure so that the first port 16 and the second port 18 communicate with each other. In this case, the central portion of the bottom surface of the seat ring 38 is formed to be substantially flat, and a plurality of recesses 74 are provided in the peripheral portion of the seat ring 38 as shown in FIG. 4 (E). Therefore, as shown in FIGS. 4D and 4F, when the valve body 76 receives a pressure equal to or higher than a predetermined pressure, the hem of the valve body 76 elastically deforms along the recess 74 of the seat ring 38. The valve body 76 closes the through hole 42 defined in the seat ring 38, and at the same time, a gap 77 is formed between the skirt portion of the valve body 76 and the flat surface portion of the guide member 26. The compressed air supplied from the first port 16 is discharged to the second port 18 side through this gap 77.

As shown in FIGS. 5 (A) and 5 (B), the valve body 78 is not elastically deformed and the valve pressure is resisted against the elastic force of the coil spring 80 at a fluid pressure higher than a predetermined pressure. It may be configured to displace the body 78. Here, the arrows in the figure show the flow of compressed air, and FIGS. 4 (A), (C), (E) and FIG. 5 (A) show the first port 16 and the third port 20 respectively. 4 (B), (D), (F), and FIG. 5 (B) reach a predetermined pressure and the first port 16 and the second port 18 respectively communicate with each other. Shows the state of communication. The predetermined pressure is set by the wall thickness and hardness of the valve bodies 28 and 76, the elastic force of the coil spring 80, and the like.

Next, an exhaust valve 82 according to another embodiment of the present invention is shown in FIGS. 6 and 7. In the following embodiments, the same components as those in the first embodiment will be designated by the same reference numerals, and detailed description thereof will be omitted.

The exhaust valve 82 according to this embodiment has a plurality of small diameter holes 86 defined at the bottom of the guide member 84, and is provided at a peripheral portion of an upper surface of the exhaust valve 82 along the peripheral portion with a predetermined interval. A substantially circular valve body 92 is formed in which the convex portion 88 abuts and an annular convex portion 90 is formed on the opposite side of the convex portion 88, and a hole 94 is defined in the peripheral surface portion to hold the valve body 92. The holding member 96, a seat ring 100 having a large diameter through hole 98, and a coil spring 102 interposed between the holding member 96 and the seat ring 100 are provided.

The operation is different from that of the embodiment shown in FIG. 1 in that the valve body 92 is elastically deformed, and the valve body 92 is displaced against the elastic force of the coil spring 102 so that the switching is performed. . That is, the state of FIG. 6 shows a state in which the first port 16 and the third port 18 communicate with each other, and the compressed air supplied from the first port 16 causes the holes 86 of the guide member 84 and the guide member 84 to move. It passes through the gap between the convex portions 88 of the valve body 92 that abuts on the bottom portion, through the through hole 96 of the seat ring 100 through the hole portion 94 of the peripheral surface portion of the holding member 96, and through the silencer element 40. It is discharged from port 20. Next, when the valve body 92 receives a pressure equal to or higher than a predetermined pressure, the valve body 92 is displaced upward against the elastic force of the coil spring 102, and the annular convex portion 90 comes to the lower end portion of the through hole 98. Abut and close it. Then, the first port 16 and the second port 18 communicate with each other (see FIG. 7). In this state, the compressed air supplied from the first port 16 is led out from the second port 18 side through the hole 86 of the guide member 84. As in the first embodiment, the fluid supplied from the external device via the second port 18 is discharged from the third port 20 due to the displacement of the valve body 92.

Next, still another embodiment is shown in FIGS. 8, 9 and 10, 11. 8 and 10 show a state in which the first ports 16a and 16b communicate with the discharge-side third ports 20a and 20b, respectively, and FIGS. 9 and 11 show the first ports 16a and 16b, respectively. And the second ports 18a and 18b communicate with each other.

The exhaust valve 104 in FIGS. 8 and 9 includes a first body 106 having a first port 16a, a second body 108 having a second port 18a and a third port 20a, and A valve body 112 having a skirt portion 110 that is close to the first port 16a and has an enlarged diameter on the outer peripheral side, and is communicated with a hole portion 114 that is close to the valve body 112 and that communicates with the second port 18a and the third port 20a The holding member 118 has a hole 116 defined therein, and the coil spring 120 is engaged with one end of the holding member 118.

As shown in FIG. 8, the exhaust valve 104 introduces the compressed air supplied from the first port 16a into the hole portion 116 through the outer peripheral surface of the skirt portion 110 of the valve body 112, It is discharged from the third port 20a communicating with the portion 116. As the pressure of the compressed air reaches a predetermined pressure, as shown in FIG. 9, the compressed air presses the inner peripheral surface of the skirt portion 110 of the valve body 112 to force the holding member 118 to repel the coil spring 120. Displace against. Due to the displacement of the holding member 118, the first port 16a and the hole 114 communicate with each other, and the compressed air supplied from the first port 16a is derived from the second port 18a and connected to the second port 18a side. Will be supplied to 68. On the other hand, the air supplied from the external device via the second port 18a is discharged from the first port 16a via the hole 114.

In the exhaust valve 122 in FIGS. 10 and 11, the compressed air supplied from the first port 16b is discharged from the third port 20b and is introduced into the piston chamber 126 via the passage 124. In this case, the second port 18b is closed by the seal member 128 (see FIG. 10). Therefore, when the pressure in the piston chamber 126 exceeds a predetermined pressure, the piston 132 is displaced in the direction of the arrow against the elastic force of the coil spring 130, and as shown in FIG. The part 134 and the first port 16b are communicated with each other. As a result, the compressed air supplied from the first port 16b can be led out from the second port 18b via the hole 134. The air supplied from the external device via the second port 18b is discharged from the first port 16b via the hole 134.

[0030]

[Effect of device]

 According to the exhaust valve of the present invention, the following effects can be obtained.

That is, when the valve body is elastically deformed or displaced by a pressure equal to or higher than a predetermined pressure of the fluid supplied from the first port, the passage between the first and third ports which are in communication is closed. At the same time, it connects the passage between the first and second ports. On the other hand, when the valve element is elastically deformed or displaced by the pressure of the fluid supplied from the external device to the second port, the passage between the second and third ports or between the first and second ports is connected. To communicate. As a result, the fluid supplied from the first port and containing water in the middle of the piping is discharged from the third port until reaching a predetermined pressure, and after reaching the predetermined pressure, the fluid containing no water is removed from the first port. It is possible to supply from the port to the second port side. In this way, it is possible to prevent water from staying in the piston chamber of the cylinder and prevent impurities from flowing into the external device.

[Brief description of drawings]

FIG. 1 is a vertical sectional view of an exhaust valve according to an embodiment of the present invention.

FIG. 2 is a vertical sectional view of an exhaust valve according to an embodiment of the present invention.

FIG. 3 is a meter-in circuit of a cylinder incorporating an exhaust valve according to the present invention.

FIG. 4 is a cross-sectional view showing a specific example of another valve body in the exhaust valve shown in FIG.

5 is a cross-sectional view showing a specific example of another valve body in the exhaust valve shown in FIG.

FIG. 6 is a vertical sectional view of an exhaust valve according to another embodiment of the present invention.

7 is a vertical cross-sectional view showing a state where the valve body of the exhaust valve in FIG. 6 has changed.

FIG. 8 is a vertical cross-sectional view of an exhaust valve according to another embodiment of the present invention.

9 is a vertical cross-sectional view showing a state where the valve body of the exhaust valve in FIG. 8 has changed.

FIG. 10 is a vertical cross-sectional view of an exhaust valve according to another embodiment of the present invention.

11 is a vertical cross-sectional view showing a state where the valve body of the exhaust valve in FIG. 10 has changed.

[Explanation of symbols]

 10, 10a, 10b ... Exhaust valve 12 ... Body 14 ... One-touch type pipe joint 16 ... First port 18 ... Second port 20 ... Third port 26 ... Guide member 28 ... Valve body 32 ... Recess 38 ... Seat ring

Claims (1)

[Scope of utility model registration request] 1. A first port supplied with a fluid from the outside, and a second port supplied with the fluid supplied from the first port to an external device, or supplied with a fluid from the external device. A port, a third port communicating with the first and second ports for discharging fluid to the outside, and a valve disposed between the first to third ports and elastically deformed or displaced by fluid pressure. The valve body communicates between the first and third ports and is supplied from the first port when the pressure of the fluid supplied from the first port is equal to or lower than a predetermined pressure. When the fluid is elastically deformed or displaced by a pressure equal to or higher than a predetermined pressure, the passage between the first and third ports is closed and the first port is closed.
And the second port are communicated with each other, and when elastically deformed or displaced by the pressure of the fluid supplied from the external device to the second port, between the second and third ports, or between the first and first ports. An exhaust valve characterized by connecting a passage between two ports.