JP4195830B2 - Valve head - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a valve head, and more particularly, to an improvement in a valve head of a so-called sanitary valve disposed in a pipe line of a unit that distributes and processes liquid foods, medicines, and the like.
[0002]
[Prior art]
In general, a large number of so-called sanitary valves for controlling the flow of liquid are provided in the pipes and tanks of a unit that circulates liquid food, medicine, and the like and performs various processes.
Such a sanitary valve is composed of a valve main body in which a valve for controlling liquid is housed, and a valve head in which an actuator for controlling driving of the valve is housed.
The actuator accommodated in such a valve head is composed of an electromagnetic valve that switches the flow direction of compressed air that drives the valve rod of the valve body, and an electrical component that controls the driving of the electromagnetic valve.
The solenoid valve controls supply of compressed air supplied from a supply source outside the sanitary valve to the valve body, and the valve port of the valve body is moved in one direction by the pressure of the compressed air. The flow direction of the liquid in the pipe line to which the sanitary valve is attached is changed by opening and changing the supply direction of the compressed air by moving the valve rod in the other direction by closing the valve port. .
[0003]
The electrical component is connected to a sensor that detects the operating state of the valve body, a light emitter that displays the operating state of the valve body, the solenoid valve, the sensor, the light emitter, etc. This corresponds to a substrate or the like on which a circuit for controlling lighting or blinking is formed.
[0004]
Such a sanitary valve, as described above, controls the flow of the liquid flowing in the pipe line, so that the liquid is blown out by an unexpected accident, the liquid is scattered by human washing, or the rainwater is installed outdoors. In order to prevent malfunction due to a short circuit that occurs due to liquid intrusion into the electrical component, etc., the valve head employs an airtight structure, and the actuator and electrical component are formed with an airtight structure. It was stored in the same space in the head.
However, in such a valve head, the compressed air supplied to the valve body due to aging of the seal part of the supply hose of the compressed air and the joint part of the joint, or damage to the solenoid valve, etc. May leak into the space.
Since such compressed air is usually high-pressure air of 0.4 megapascals, if it leaks into the valve head, the inside of the valve head becomes a high-pressure state, and as a result, electrical components may be damaged. In addition, when the valve head is opened for replacement of electrical components, the electrical component cover member is blown off due to high internal pressure, or damaged electrical components are ejected to the outside, damaging the operator. There is a possibility.
[0005]
From the viewpoint of ensuring such safety, even if compressed air leaks into the valve head, there is also a valve head in which an air vent hole for releasing the compressed air to the outside of the valve head is formed. .
However, when such an air vent is provided, there is a problem that it is not possible to clear “IP67” which is a standard required for an environment used for liquid scattering or equipment used outdoors. It was.
In addition, although this applicant investigated the valve head which aims at the solution of the said problem, it was not able to discover prior art literature.
[0006]
[Problems to be solved by the invention]
SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a valve head attached to a sanitary valve that can avoid the danger due to leakage of compressed air and that can satisfy the standard of “IP67” by adopting a complete waterproof structure.
[0007]
[Means for Solving the Problems]
In order to solve the above problems, the present invention includes a solenoid valve that is mounted on a valve body and switches a flow direction of compressed air that drives a valve rod of the valve body, and an electrical component that controls the operation of the solenoid valve. A valve head housed in the body, wherein the housing includes a solenoid valve housing space for housing the solenoid valve and an electrical component housing space for housing the electrical component, wherein the solenoid valve housing space and the electrical component are stored. The component storage spaces are formed separately from each other , the electrical component storage space is formed in an airtight structure, and the electromagnetic valve storage space is formed in a non-airtight structure .
Therefore, even if the compressed air supplied to the electromagnetic valve stored in the electromagnetic valve storage space leaks due to aging of the joint or the seal portion, the compressed air stops in the electromagnetic valve storage space. The electric component storage space does not enter.
As a result, in the present invention, it is possible to prevent the electrical component from being damaged even when there is a leak of compressed air. Further, when the valve head is opened for maintenance, it is possible to effectively prevent a dangerous situation such as a squirt of the electrical component cover member or a damaged electrical component scatters and damages the operator.
[0008]
Further, in the present invention, since the above-mentioned electrical components are housed in an airtight state, even when used in a sanitary valve, liquid ejection due to an unexpected accident or human cleaning It is possible to prevent a situation in which a short circuit occurs due to splash of liquid or intrusion of rainwater or the like due to outdoor installation.
[0009]
Moreover, the solenoid valve accommodated in the said solenoid valve accommodation space shall be formed so that it may provide waterproofness and dustproofness in itself.
As a result, the solenoid valve itself has a waterproof and dustproof structure even when the compressed air leakage hole is provided in the electromagnetic valve storage space, while the electrical component storage space Since the valve head is formed in an airtight state, the entire valve head can satisfy the “IP67” standard.
[0010]
In the present invention, the casing includes a base member connected to the valve body, the electromagnetic valve storage space, the electrical component storage space, and the valve operation detected member storage space. A housing body fixed to the electrical equipment component cover member that covers the electrical component storage space in the housing body, and an electromagnetic valve cover member that covers the electromagnetic valve storage space in the housing body. The electrical component storage space is provided by being separated from the electromagnetic valve storage space by a wall portion formed between the electromagnetic valve storage space and the electromagnetic valve storage space.
Therefore, the electrical component storage space and the electromagnetic valve storage space are arranged clearly separated by the wall portion.
[0011]
In the present invention, the electromagnetic valve cover member is formed in a hollow box shape with one opening, and the housing body is provided with a recess into which the electromagnetic valve cover member can be inserted. The valve cover member can be inserted into the concave portion so that the peripheral wall portion overlaps the inner wall portion forming the concave portion.
[0012]
Further, the electrical component cover member can be configured to be attached to the housing body via a seal member.
Therefore, in the present invention, an airtight structure can be formed between the electrical component cover member and the housing body.
[0013]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. As shown in FIGS. 2 and 3, the valve head 1 according to the present embodiment is attached to the valve body 2, and as shown in FIG. 1, the compressed air that drives the valve rod 3 of the valve body 2 is used. The electromagnetic valve 4 for switching the flow direction is accommodated, and the housing 5 has an electromagnetic valve storage space 6 and an electrical component storage space 7 in the interior, and the electromagnetic valve storage space 6 and the electrical component. The storage space 7 is formed isolated from each other.
The electrical component storage space 7 is formed in an airtight structure, and the electromagnetic valve storage space 6 is formed in a non-airtight structure.
[0014]
The solenoid valve 4 housed in the solenoid valve housing space 6 is formed so as to have waterproofness and dustproofness.
Further, as shown in FIG. 1, the housing 5 includes a base member 8 connected to the valve body 2, the electromagnetic valve storage space 6, the electrical component storage space 7, and the valve operation detected member storage space 9. A housing body 10 that is fixed to the base member 8, an electrical component cover member 11 that covers the electrical component storage space 7 in the housing body 10, and the electromagnetic valve storage space 6 in the housing body 10. And a solenoid valve cover member 12 formed in a side U shape.
[0015]
The electrical component storage space 7 and the valve operation detected member storage space 9 are provided separated from the electromagnetic valve storage space by a partition wall 27 formed between the electromagnetic valve storage space 6 and the electromagnetic valve storage space 6.
The electromagnetic valve storage space 6 is formed by a recess opening on the back side, and the electromagnetic valve cover member 12 formed in the side U shape has a peripheral wall surface portion 14 formed by the partition wall 27. The concave portion 13 is inserted and arranged in a state of being joined to the inner wall surface portion 15 of the concave portion 13.
[0016]
As shown in FIGS. 1 and 7, the casing body 10 is formed into a cylindrical shape having a planar elliptical opening 36 on the front side by integral molding with a synthetic resin, and is formed in a step shape. An electrical component storage space 7 is provided on the front side defined by 27, and an electromagnetic valve storage space 6 is formed on the back side of the partition wall 27.
The casing body 10 includes a planar circular bottom surface 38 and a side wall 47 erected from the periphery of the bottom surface 38, and includes an upper surface 40 of the partition wall 27 and the partition wall 27. Three fixing columns 39, 39, 39 for fixing an electrical component cover member 11, which will be described later, to the housing body 10 are projected on the front bottom surface 38.
[0017]
A pair of fixing columns 41 and 41 for fixing the light emitting device 21 and the control device 22 are provided upright on the front end portion of the upper surface portion 40 of the partition wall 27.
In addition, a substantially cylindrical bulging portion 48 is formed at the center of the side surface portion 42 of the partition wall 27, and as shown in FIG. 9 is formed.
Inside this, a bolt 25 connected to a later-described valve rod 3 is disposed, and moves up and down following the up-and-down movement of the valve rod 3 by the supply of compressed air.
[0018]
A sensor detection magnet 29 is fixed to the bolt 25, and the operation position of the valve stem 3 can be detected by the sensor 19 described later via the magnetism of the sensor detection magnet 29.
[0019]
As shown in FIGS. 4 and 7, the electrical component storage space 7 includes, as electrical components, a light emitting device 21 that displays the operating states and abnormal states of the valve, a solenoid valve 4, sensors 19 a, 19 b, 19c, 20 and the light emitting device 21 and the like, and a control device 22 including a substrate on which an electronic circuit for controlling the operation of the electromagnetic valve 4 and lighting or blinking of the light emitting device 21 is formed. Are arranged.
[0020]
That is, the light emitting device 21 is fixed to the fixing columns 41, 41 together with the control device 22 with screws, and is disposed on the upper surface portion 40 of the partition wall 27.
As shown in FIG. 1, in the present embodiment, the light emitting device 21 is disposed on the LEDs 34a, 34b, 34c, 34d having different emission colors and on the LEDs 34a, 34b, 34c, 34d. And a light refraction member 35 that transmits and scatters the light of the LED.
[0021]
The sensors 19a, 19b, and 19c are proximity switches, and are arranged on the bulging portion 48 at different height positions. As a result, as shown in FIGS. 4 and 5, the position fluctuation of the valve stem 3 of the valve body 2 is detected by the three sensors 19a, 19b, 19c through the sensor detection magnet 29, and the valve operation is performed. The state, that is, the fully open state of the valve, the fully closed state of the valve, and the half open state of the valve can be detected.
A sensor 20 that can detect an abnormal state of the valve is disposed on one side of the bottom surface 38.
[0022]
In the present embodiment, proximity switches are used for the sensors 19a, 19b, and 19c, and four types of LEDs having different colors are used for the light emitting device 21. The sensors and light emitting devices to be used are free and are not limited to the proximity switches and LEDs described above, and other types of components can also be used.
[0023]
As shown in FIGS. 4 and 6, a cable connector 37 of a cable 28 from an external power source that supplies driving power to the electrical component is provided on the side surface of the housing body 10.
The cable connector 37 is also formed in an airtight structure, and as shown in FIG. 7, the cable connector 37 is fixed to the mounting hole via a gasket 44 that is a sealing member, and the electrical components in the housing body 10 are connected from the cable connector 37. It is configured so that liquid and dust do not enter the storage space 7 and the valve operation detected member storage space 9.
[0024]
Similarly, in the vicinity of the cable connector 37, there are provided a connector plug 45 and 45 for connecting wiring to a sensor for detecting a malfunction of the bellows when the valve is provided with a bellows. Similarly, this connector plug 45 is also fixed to the mounting hole via a seal member.
On the other hand, as shown in FIGS. 4 and 7, the electrical component cover member 11 is formed in a flat teardrop shape, and is formed by integral molding of synthetic resin in the same manner as the housing body 10. It is formed in a large cap shape so that it can be joined to the opening 36 of the main body 10 to cover the upper portion of the housing main body 10.
[0025]
A transparent dome 31 protrudes and is attached to the top of the electrical component cover member 11 in an airtight manner, and fixing holes 49, 49, 49 are provided at three locations.
As shown in FIGS. 1 and 7, the electrical component cover member 11 is joined to the opening 36 of the housing body 10 via a seal member 16 made of an O-ring, and the fixing hole 49, It is fixed to the fixing columns 39, 39, 39 through 49, 49, respectively.
[0026]
As a result, since the electrical component cover member 11 is firmly attached to the housing body 10 in an airtight state, airtightness is ensured between the electrical component cover member 11 and the housing body 10. .
Further, as described above, the cable connector 37 is fixed to the mounting hole via the gasket 44 which is a seal member, and the connector plug 45 is similarly fixed to the mounting hole via the seal member. Since the base member 8 is also fixed by the screw 26 via the O-ring 50, the interior of the electrical component storage space 7 in the housing body 10 is ensured to be completely airtight.
[0027]
On the other hand, as shown in FIG. 1, as described above, the electromagnetic valve storage space 6 is provided on the back side of the partition wall 27, and the electromagnetic valve storage space 6 opens toward the rear of the housing body 10. The recess 13 is formed.
The electromagnetic valve 4 is attached to an electromagnetic valve cover member 12 having a U-shaped cross section, and is inserted into the recess 13 together with the electromagnetic valve cover member 12.
[0028]
As shown in FIG. 7, the electromagnetic valve cover member 12 is formed in an open hollow box shape. As shown in FIG. 1, pipes 18 a and 18 b that connect the solenoid valve 4 and the cylinder 17 and supply compressed air to the valve body 2 are joined to the solenoid valve 4 while penetrating the solenoid valve cover member 12. ing.
Accordingly, through holes 51 and 51 are formed in the lower end portion of the electromagnetic valve cover member 12, and the socket portions 53 and 53 constituting the pipes 18 a and 18 b are connected to the electromagnetic valve cover via the through holes 51 and 51. It is fixed to the member 12. As a result, compressed air is supplied to the cylinder 17 through the pipes 18a and 18b, and the valve rod 3 is appropriately driven to open and close the valve seat by the valve body.
[0029]
As shown in FIG. 3, the electromagnetic valve cover member 12 is fixed to the housing body 10 by screws 52 and 52. An airtight structure is not applied to the electromagnetic valve cover member 12. This is because when compressed air supplied to the valve body leaks into the space inside the valve head due to aging of the seal part of the hose constituting the pipe 18 and the joint of the joint, damage to the electromagnetic valve, etc. This is because the compressed air is actively released to the outside, the pressure increase in the electromagnetic valve storage space 6 is prevented, and the physical influence on the electrical component storage space 7 is reduced.
[0030]
Therefore, since the electromagnetic valve storage space 6 is formed in a non-airtight structure, water or dust may enter the electromagnetic valve storage space 6 from the outside of the housing 5 and the electromagnetic valve 4 may break down. There is. Therefore, the electromagnetic valve 4 according to the present embodiment has a waterproof and dustproof structure.
[0031]
As shown in FIG. 1, when the electromagnetic valve cover member 12 is inserted into the concave portion 13 as the electromagnetic valve storage space 6, the peripheral wall portion 14 is joined to the inner wall portion 15 of the concave portion 13. It becomes. Accordingly, since the peripheral wall portion 14 is further disposed inside the partition wall 27 that separates the electrical component storage space 7 and the solenoid valve storage space 6, the wall portion 27 is disposed with respect to the electrical component storage space 7. , 14 are arranged, and the wall portion is doubled and the strength is improved. Therefore, when the compressed air leaks, interference with the compressed air electrical component storage space 7 is more reliably eliminated. be able to.
[0032]
Further, the electromagnetic valve 4 is attached to the electromagnetic valve cover member 12 having a U-shaped cross section and is inserted into the recess 13 together with the electromagnetic valve cover member 12.
When an abnormal state occurs in the solenoid valve 4 and it becomes necessary to repair or replace it, the solenoid valve cover member 12 is easily removed from the housing body 10 together with the solenoid valve 4 by removing the screws 52 and 52. be able to.
Therefore, in this embodiment, the electromagnetic valve 4 can be attached or exchanged as an assembly integrally with the electromagnetic valve cover member 12, and the maintenance of the valve head 1 can be easily performed.
[0033]
As shown in FIGS. 2 and 3, the valve head 1 according to the present embodiment is attached to the upper end portion of the valve body 2. Although the internal structure of the valve body 2 is not shown, a valve rod 3 joined to a piston is accommodated in the compressed air cylinder 17 so as to be freely displaceable in the vertical direction, and a valve body (not shown) is disposed at the lower end of the valve rod 3. Is attached.
The valve rod 3 is driven via the piston by the compressed air fed into the compressed air cylinder 17 so that the valve element opens and closes the opening of the pipe and controls the flow of various liquids. Has been.
[0034]
[Action]
In the casing 5 of the valve head 1 according to the present embodiment, an electromagnetic valve storage space 6 and an electrical component storage space 7 are provided, and the electromagnetic valve storage space 6 and the electrical component storage space 7 are partitioned. Since they are separated from each other by the wall 27, even if compressed air leaks due to various causes in the electromagnetic valve storage space 6, the compressed air does not enter the electrical component storage space 7, so that the electrical component storage Various electrical components housed in the space 7 are not damaged by the pressure of the compressed air.
[0035]
Moreover, since the electrical component storage space 7 is formed in an airtight structure, dust, dust, liquid, or the like does not enter the electrical component storage space 7 from the outside, and the electrical component is not damaged.
Further, since the electromagnetic valve storage space 6 is formed in a non-airtight structure, even if compressed air leaks from the electromagnetic valve 4 or the like stored inside, the compressed air is discharged from the gap to the outside of the housing 5. Since it can escape, the pressure increase in the electromagnetic valve storage space 6 can be avoided, and the influence on the electrical component storage space 7 can be prevented.
[0036]
Further, since the solenoid valve 4 housed in the solenoid valve housing space 6 is formed so as to have waterproofness and dustproofness, the solenoid valve housing space 6 is, for example, as described above. Even if it is formed in a non-airtight state, the solenoid valve 4 is not damaged by water, dust, dust or the like.
In the present embodiment, the valve head according to the present invention has been described as an example in which the valve head is applied to a so-called sanitary valve provided in a conduit through which liquid flows or a tank that stores liquid. The present invention is not limited to the above embodiment, and can be widely applied to other valves, for example, valve heads that are used outdoors and are required for waterproof and dustproof structures.
[0037]
【The invention's effect】
The valve head according to the first aspect of the present invention is a case where the compressed air supplied to the valve main body leaks due to breakage of the electromagnetic valve, aging of the seal part of the compressed air supply hose, and the joint part of the joint. However, since the electromagnetic valve storage space and the electrical component storage space of the housing are isolated, the electromagnetic valve storage space is not affected by the compressed air.
As a result, when the valve head is opened to replace the electrical parts as in the past, it is possible to effectively prevent the situation where the electrical parts jump out to the outside due to the high internal pressure and damage the operator. It is possible to perform maintenance work safely.
Further, various electrical components housed in the housing can be prevented from being damaged by the compressed air, and the electrical components can be protected and failure can be reduced.
[0038]
In addition, since the electrical component storage space is formed in an airtight manner, dust and liquid do not enter the electrical component storage space, so it is possible to prevent a situation such as a short circuit of the electrical component and protect the electrical component. be able to.
In addition, since the solenoid valve storage space is formed in a non-airtight structure, even if compressed air leaks from the solenoid valve, the compressed air can escape from the gap to the outside of the housing, and the pressure in the solenoid valve storage space The rise can be prevented. Thereby, damage to a housing can be prevented.
[0039]
In the valve head according to the second aspect of the present invention, the electromagnetic valve is formed so as to be waterproof and dustproof, so that even if the electromagnetic valve storage space is formed in an airtight manner, Protects against water and dust, reducing failure.
As a result, in addition to the effect of the first aspect, in the present invention, it is used all the whole valve head duty structure moiety because it is constituted by a gas-tight structure, in an environment that processes a liquid It is possible to conform to “IP67” which is a standard required for a device.
[0040]
According to a third aspect of the present invention, in the valve head of the present invention, the casing includes a base member, a casing body, an electrical component cover member that covers the electrical component storage space, and an electromagnetic valve cover member that covers the electromagnetic valve storage space. By comprising, the structure which isolates an electrical component storage space and a solenoid valve storage space can be formed easily.
[0041]
According to a fourth aspect of the present invention, there is provided the valve head according to the present invention, wherein the electromagnetic valve cover member is formed in a hollow box shape with one opening, and the electromagnetic valve cover member has a peripheral wall in a recess provided in the housing body. Since the portion is inserted and fitted so as to overlap the inner wall portion of the recess, a part of the wall that separates the electromagnetic valve storage space and the electrical component storage space is doubled to increase the strength. The advantage of increased performance is obtained.
[0042]
In the valve head according to the fifth aspect of the present invention, since the electrical component cover member is attached to the housing body via the seal member, the electrical component storage space can be easily formed into an airtight structure.
[Brief description of the drawings]
FIG. 1 is a longitudinal sectional view of a valve head mounted on a valve body according to an embodiment of a valve head according to the present invention.
FIG. 2 is a front perspective view of a valve head mounted on a valve body according to an embodiment of the valve head according to the present invention.
FIG. 3 is a perspective view of the back side of the valve head mounted on the valve main body according to the embodiment of the valve head according to the present invention.
FIG. 4 is a perspective view showing an internal structure through an electrical component cover member of the valve head mounted on the valve main body according to the embodiment of the valve head according to the present invention.
FIG. 5 is a front view showing an internal structure through an electrical component cover member of the valve head mounted on the valve main body according to the embodiment of the valve head according to the present invention.
FIG. 6 is a rear view of the valve head mounted on the valve main body according to the embodiment of the valve head according to the present invention.
7 is an exploded perspective view of a valve body and a valve head according to an embodiment of the valve head according to the present invention. FIG.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Valve head 2 Valve body 3 Valve stick 4 Solenoid valve 5 Housing 6 Electromagnetic valve storage space 7 Electrical component storage space 8 Base member 9 Valve operation detected member storage space 10 Housing main body 11 Electrical component cover member 12 Electromagnetic valve cover member 13 recess 14 solenoid valve cover member peripheral wall 15 recess inner wall 16 seal member 17 cylinder 18a, 18b piping 19a, 19b, 19c sensor 20 sensor 21 light emitting device 22 controller 23 screw 24 hole 25 bolt 26 screw 27 partition wall 28 cable 29 detection magnet 30 screw 31 dome 32 connector socket 33 connector plug 34a, 34b, 34c, 34d LED
35 light refracting member 36 opening 37 cable joint 38 bottom surface 39 fixing column 40 upper surface 41 fixing column 42 side wall 44 gasket 45 connector plug 47 side wall 48 bulging portion 49 fixing hole 50 O-ring 51 through hole Part 52 screw 53 socket part

Claims (5)

A valve head mounted in a valve body and containing a solenoid valve for switching a flow direction of compressed air that drives a valve rod of the valve body and an electrical component for controlling the operation of the solenoid valve in a housing,
The housing includes an electromagnetic valve storage space for storing the electromagnetic valve and an electrical component storage space for storing the electrical component, and the electromagnetic valve storage space and the electrical component storage space are formed separately from each other. ,
The valve head characterized in that the electrical component storage space is formed in an airtight structure, and the electromagnetic valve storage space is formed in a non-airtight structure . 2. The valve head according to claim 1, wherein the electromagnetic valve stored in the electromagnetic valve storage space has a waterproof and dustproof structure. The housing includes a base member connected to the valve body, the electromagnetic valve storage space, the electrical component storage space, and the valve operation detected member storage space, and a housing body fixed to the base member; An electrical component cover member that covers the electrical component storage space in the housing body; and an electromagnetic valve cover member that covers the electromagnetic valve storage space in the housing body, the electrical component storage space comprising the electromagnetic valve storage space The valve head according to claim 1 , wherein the valve head is provided so as to be isolated from the electromagnetic valve storage space by a wall portion formed therebetween. The solenoid valve cover member is formed in an open hollow box shape, and the housing body is provided with a recess into which the solenoid valve cover member can be inserted, and the solenoid valve cover member has a peripheral wall portion with the recess. The valve head according to claim 3 , wherein the valve head is inserted into the recess so as to overlap the inner wall portion of the valve. 4. The valve head according to claim 3, wherein the electrical component cover member is attached to the housing body via a seal member.

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