JP6478385B2 - Tube for pinch valve device, pinch valve device and fluid supply system - Google Patents

Description

  The present invention relates to an on-off valve for piping that circulates liquid or the like, in particular, a pinch valve device, and relates to a tube applied to the pinch valve device.

The pinch valve device is a valve that performs a closing operation of a flow path by closing a flow path inside the tube by mechanically crushing or pinching a strong elastic tube such as silicon rubber from the outside. Such a valve is used by being attached to piping of a plant that produces, for example, foodstuffs, milk drinks, medicines, cosmetics and the like.
Since a general pinch valve device is installed in a line including a pipe for flowing liquid or powder, clogging does not occur inside the pinch valve device, the inside of the device is easy to clean, and Requirements such as easy disassembly and assembly of the device are required.
As a pinch valve device excellent in these points, for example, a disk-shaped valve housing, a rotor that is rotatably disposed inside the valve housing, and a tube made of an elastic material disposed inside the rotor, A pinch valve device is known that includes a pair of pinch levers that are swingably disposed outside the central portion of the tube, and means for driving the tube in a direction to sandwich the tube with the pair of pinch levers (Patent Document 1). reference).

Japanese Patent No. 5363692

In the pinch valve device disclosed in Patent Document 1, once the tube is attached to the valve housing, the attachment position of the tube is fixed, so that the same portion of the tube is always sandwiched between a pair of pinch levers (pinch Will be).
If the valve is repeatedly opened and closed for a long time in such a state of use, only the portion of the tube that contacts the pinch lever will be subjected to a load and will be worn out or worn away, resulting in durability problems. Had.
In addition, when a high-pressure fluid or the like flows in the tube, the pressure of the fluid or the like is concentrated on the tube because the tube is formed of the softest material among the components of the pinch valve device. There was also a problem that the tube may swell and break.
Furthermore, there has been a problem that a trouble in use occurs when the inside of the tube becomes a negative pressure or a vacuum and the tube itself contracts inward.
For this reason, when the said trouble etc. generate | occur | produced in the tube, replacement | exchange of a tube was needed and there existed a problem that the cost concerning the tube as a consumable item will become high if the replacement frequency of a tube becomes high.

In order to achieve the above problems, a pinch valve device for tube of the present invention includes a cylindrical tube body, and at least one cylindrical outer peripheral member is mounted on the outer peripheral surface of the tube body, Ri Tona The outer peripheral member is rotatably mounted on the outer peripheral surface of the tube body .

According to the configuration of the present invention, the tube applied to the pinch valve device can be prevented from breaking due to an increase in internal pressure, a failure due to a negative pressure in the tube, and the like, and can improve durability against repeated pinch operations. be able to.
As a result, it is possible to reduce the burden on maintenance of the tube for the pinch valve device, the pinch valve device, and the fluid supply system including these.

FIG. 1 is a perspective view showing an external appearance of a typical pinch valve device to which a tube for a pinch valve device of the present invention is attached. FIG. 2 is a perspective view showing the internal structure of the valve main body of the pinch valve device shown in FIG. FIG. 3 is a perspective view showing an outline of a tube for a pinch valve device according to Embodiment 1 of the present invention. FIG. 4 is a perspective view showing an outline of a tube for a pinch valve device according to Embodiment 2 of the present invention. FIG. 5 is a side view showing the outline of the outer peripheral member of the tube for the pinch valve device according to the third embodiment of the present invention. FIG. 6 is a plan view showing an outline of an outer peripheral member of a tube for a pinch valve device according to Embodiment 4 of the present invention.

FIG. 1 is a perspective view showing an appearance of a pinch valve device 1 to which a tube 150 for a pinch valve device of the present invention is applied. FIG. 2 is a perspective view showing the internal structure of the valve body 10 of the pinch valve device 1 shown in FIG.
1 and 2 show an example in which a pinch valve device tube 150 of Example 1 to be described later is applied, the same applies to the pinch valve device tubes shown as Examples 2 to 4. Can be applied to.

As shown in FIG. 1, the pinch valve device 1 includes a valve body 10 having a disk-like appearance, and a drive device 20 that drives a mechanism provided inside the valve body 10.
Further, as shown in FIG. 2, the valve main body 10 shown in FIG. 1 includes a first valve housing 100, a pipe mounting portion 102 provided in the first valve housing, a second valve housing 110, And a pipe mounting portion 112 provided in the second valve housing.

A tube 150 for a pinch valve device of the present invention is attached to the inside so as to straddle the first valve housing 100 and the second valve housing 110, and a flange portion 153 described later includes the pipe attachment portion 102 and the pipe attachment portion. 112 are attached so as to contact each of them.
For this reason, the flange portion 153 also functions as a positioning portion when the pinch valve device tube 150 is attached to the pinch valve device 1.

As shown in FIG. 2, a rotor 120 is rotatably inserted into the first valve housing 100 and the second valve housing 110 constituting the valve body 10. A gear portion 122 is formed on a part of the outer periphery of the rotor 120, and a pair of first cam peaks 124 and second cam peaks 125 are provided inside the rotor 120 so as to face each other.
Inside the rotor 120, the tube 150 for a pinch valve device of the present invention is disposed. As described above, the flanges 153 at both ends of the pinch valve device tube 150 are firmly held by the flanges of the first valve housing 100 and the second valve housing 110.

In addition, a pair of pinch levers 160 that pinch the pinch valve device tube 150 and seal the flow of fluid flowing inside the pinch valve device tube 150 inside the rotor 120 and outside the central portion of the pinch valve device tube 150 are struts. 116 is provided so as to be rotatable around 116.
When the rotor 120 rotates, the pinch lever 160 is pressed inward by the first cam crest 124 formed inside the rotor 120 and rotates. By the rotation operation, the distance between the pair of pinch levers 160 is reduced, and the central portion of the pinch valve device tube 150 is crushed and pinched.

<Example 1>
FIG. 3 is a perspective view showing an outline of a tube for a pinch valve device according to Embodiment 1 of the present invention.
As shown in FIG. 1, the pinch valve device tube 150 according to the first embodiment includes a tubular tube main body 151, an outer peripheral member 152 attached to the outer peripheral surface of the tube main body 151, and both ends in the longitudinal direction of the tube main body 151. And an outward flange portion 153 formed on the outer surface.

The tube main body 151 in Example 1 is a cylindrical member having the same thickness and the same inner diameter in the longitudinal direction. Here, the flange portions 153 are integrally formed at both ends of the tube main body 151 in the longitudinal direction, but the flange portions 153 may be formed only at one end of the tube main body 151.
Further, the flange portion 153 functions as a connection portion with other piping when the tube 1 for pinch valve device of the present invention is mounted on the pinch valve device, and can also function as a positioning portion at the time of mounting.

The outer peripheral member 152 is formed with an inner diameter having the same dimension as the outer diameter of the tube main body 151 and is disposed so as to be in close contact with the outer peripheral surface of the tube main body 151 or has an inner diameter slightly larger than the outer diameter of the tube main body 151. The outer peripheral surface of the tube body 151 is formed so as to be rotatable.
In the pinch valve device tube 150 of the present invention, the tube main body 151, the flange portion 153, and the outer peripheral member 152 can all be formed of an elastic material such as silicon rubber.

With such a configuration, it is possible to suppress the wear and breakage of the tube, which has conventionally occurred when the pinch lever that pinches the tube for the pinch valve device is in direct contact with the tube.
As a pinch mechanism (for example, pinch lever 160 in FIG. 1) of a conventional pinch valve device, a tip having a tapered tip or a curved surface having a semi-circular cross section is used.
At this time, in the conventional tube, the pinch lever having a small contact area as described above directly contacts the outer peripheral surface of the tube. As a result, the load on the tube at the time of pinching becomes local, and the outer peripheral surface of the tube is greatly worn. Become.

On the other hand, in the pinch valve device tube 150 according to the first embodiment, the outer peripheral member 152 is mounted on the outer peripheral surface of the tube main body 151, and therefore, the pinch operation is performed with a pinch lever having a small contact area. In addition, the outer peripheral member 152 serves as a buffer material, and the local load on the tube main body 151 is reduced.
Further, since the outer peripheral member 152 has a predetermined length (width) in the longitudinal direction of the tube, even if the pinch lever and the outer peripheral member 152 are locally in contact, the outer peripheral member 152 and the tube main body 151 are in surface contact. Therefore, the load on the tube main body 151 during the pinch operation can be reduced.

  As described above, the outer peripheral member 152 may be formed to have the same inner diameter as the outer diameter of the tube main body 151 so as to be in close contact with the outer peripheral surface of the tube main body 151, or the outer peripheral surface and the outer periphery of the tube main body 151. The inner surface of the member 152 may be bonded to the inner surface, or the inner surface of the tube body 151 is formed with an inner diameter slightly larger than the outer diameter of the tube body 151 so that the outer surface of the tube body 151 is rotatable. May be.

  In particular, when the outer peripheral member 152 is disposed on the outer peripheral surface of the tube main body 151, the tube main body 151 is bonded to the outer peripheral member 152 even if the tube main body 151 suddenly becomes negative pressure or vacuum and the tube main body 151 tends to shrink inward. Therefore, it is possible to suppress the degree of contraction inward, and it is possible to suppress obstacles in use of the tube.

Further, when the outer peripheral member 152 is rotatably provided on the outer peripheral surface of the tube main body 151, for example, in the pinch valve device 1 shown in FIG. 1 or 2, the pinch lever 160 contacts the outer peripheral member 152 while rotating. The force in the direction of rotating around the tube main body 151 acts on the outer peripheral member 152 for each repeated pinch operation.
For this reason, the outer peripheral member 152 rotates around the outer peripheral surface of the tube main body 151 by the force in the rotating direction, and the contact position between the outer peripheral member 152 and the pinch lever 160 changes every time the pinch operation is performed. Wear at the same position of 152 can be prevented.
Even if the outer peripheral member 152 is worn due to the pinch operation, it is possible to extend the life of the entire tube only by replacing the outer peripheral member 152 without replacing the entire tube for the pinch valve device. .

Furthermore, conventionally, when the pressure of the fluid flowing through the tube is increased, the central portion (a region to be pinched) of the tube may expand and break.
On the other hand, in the tube 150 for the pinch valve device of the first embodiment, the outer peripheral member 152 is mounted on the outer peripheral surface of the tube main body 151, so that the internal pressure of the fluid flowing inside the tube main body 151 increases and the tube main body Even if 151 expands, the outer peripheral member 152 serves as a stopper, and the tube main body 151 does not expand larger than the inner diameter of the outer peripheral member 152. Therefore, the tube main body 151 can be prevented from being broken due to an increase in internal pressure.

<Example 2>
FIG. 4 is a perspective view showing an outline of a tube for a pinch valve device according to Embodiment 2 of the present invention.
As shown in FIG. 4, in the tube for pinch valve device 250 according to the second embodiment of the present invention, the tubular tube body 251 is gradually (continuously) from the vicinity of the openings at both ends in the longitudinal direction toward the intermediate portion side. (Ii) It is formed in such a shape that the outer diameter becomes small.
In addition, the tube body 251 in the second embodiment is integrally formed with flange portions 253 at both ends in the longitudinal direction, as in the first embodiment. Also in the second embodiment, the flange portion 253 may be formed only on one end of the tube body 251.

The outer peripheral member 252 is formed so as to follow the outer shape of the tube main body 251 with the same dimension as the outer diameter in the region where the inner diameter is the smallest in the middle portion in the longitudinal direction of the tube main body 251 described above, and is in close contact with the outer peripheral surface of the tube main body 251 Or an inner diameter slightly larger than the outer diameter so that the outer peripheral surface of the tube body 251 is rotatable.
In this case, the inner diameter of the outer peripheral member 252 may be gradually reduced toward the central portion, similarly to the outer diameter of the tube main body 251, or may be the same inner diameter in the entire longitudinal direction.

With such a configuration, the outer peripheral member 252 is interposed between the tube body 251 of the tube and the pinch lever 160 as in the case of the first embodiment, and the two do not come into direct contact with each other. As in the case of, wear and breakage of the tube body 251 can be suppressed.
Moreover, the effect can be acquired similarly to the case of Example 1 also about the point that durability of the tube main body 251 can be improved when the sudden raise or fall of the internal pressure in a tube generate | occur | produces.
Furthermore, in Example 2, since the intermediate portion in the longitudinal direction of the tube main body 251 has a reduced diameter, when the outer peripheral member 252 is attached to the outer peripheral surface of the tube main body 251, the outer peripheral member is the tube main body 251. It becomes a structure which does not move easily on the side of expanding the diameter, and as a result, the mounting position of the outer peripheral member 252 is stabilized.

<Example 3>
FIG. 5 shows a modified example of the outer peripheral member shown in the first and second embodiments as the third embodiment, and is a side view showing an outline of the outer peripheral member as viewed from the axial direction of the tube.
As shown in FIG. 5, in the pinch valve device tube of Example 3 of the present invention, the outer peripheral member 352 is formed by joining the end portions of a tape-shaped member into a cylindrical shape.
At this time, if one having an adhesive on one surface of the tape-shaped member is used, the inner surface of the cylindrical outer peripheral member 352 can be fixed to the tube body, and the tape-shaped member is removed as necessary. Only the outer peripheral member can be replaced with the tube body attached to the pinch valve device.

Moreover, the length of the said longitudinal direction which provides an outer peripheral member can also be adjusted suitably by adjusting suitably the overlap condition of the tape-shaped member in the longitudinal direction of a tube main body.
Furthermore, by winding the tape-shaped member twice or triple, the strength and rigidity of the outer peripheral member 352 itself can be increased, and as a result, the durability of the tube for the pinch valve device can be further improved.

<Example 4>
FIG. 6 is a plan view showing another modified example of the outer peripheral member other than those shown in the first to third embodiments of the present invention as a fourth embodiment.
In the pinch valve device tube according to the fourth embodiment of the present invention, the outer peripheral member 452 is provided with at least one reinforcing rib (thick portion) integrally or separately on the outer surface thereof as the reinforcing member 454.
FIG. 6A shows a case where the reinforcing portion 454 is formed in the longitudinal direction of the outer peripheral member 452. By forming such a reinforcing portion 454, the strength and rigidity of the outer peripheral member 452 itself can be increased, and as a result, the durability of the pinch valve device tube is improved.

FIG. 6B shows a case where the reinforcing portion 454 is formed in the circumferential direction of the outer peripheral surface of the outer peripheral member 452. By forming such a reinforcing portion 454, the strength of the outer peripheral member 452 can be increased and the durability of the tube can be improved as in the case shown in FIG.
Further, the reinforcing portion 454 is not provided over the entire length of the outer peripheral member 452 in the longitudinal direction, and is locally disposed only in a part of the longitudinal direction (for example, the contact position of the pinch lever) as shown in FIG. For example, the outer peripheral member 452 having a reinforcing function can be obtained while suppressing an increase in weight due to the addition of the reinforcing portion 454 as much as possible.

  According to the tube for the pinch valve device provided with these reinforcing portions 454, not only the durability of the tube against the pinch operation is improved, but also when the internal pressure in the tube increases and the tube expands or the inside of the tube is abruptly negatively affected. Even when the tube is contracted inward due to pressure or vacuum, the reinforcing portion 454 exhibits resistance to deformation due to the load of the internal pressure or is released from the load of the internal pressure. The restoring force to restore the shape of the tube can be exhibited.

In FIG. 6, the case where the reinforcing portion 454 is formed on the outer peripheral surface of the outer peripheral member 452 is illustrated, but the reinforcing portion 454 may be formed on the inner surface side of the outer peripheral member 452.
In this case, when the outer peripheral member 452 is attached to the outer peripheral surface of the tube main body, a gap corresponding to the height of the reinforcing portion 454 is formed between the tube main body and the outer peripheral member 452, so that As in the case of the example, the outer peripheral member 452 has an effect when it is rotatably attached to the tube body.
Further, as another modified example of the outer peripheral member 452 provided with the reinforcing portion 454 shown in the fourth embodiment, for example, the material of the outer peripheral member may be partially changed to a material having high strength.

In the above-described embodiment, the tube for a pinch valve device of the present invention is applied to a pinch valve device provided with a valve housing and a pair of pinch levers that are provided in the valve housing and move toward and away from each other. Illustrated.
However, if the tube for the pinch valve device and the outer peripheral member of the present invention can open and close the flow path in such a manner that the tube is pressed and crushed from the outside, it can be pinched by various means other than the pinch lever. Applicable to devices.

In Examples 1 to 4, silicon rubber is exemplified as the material of the tube main body and the outer peripheral member. However, for example, a polymer material such as fluorine resin or ethylene propylene diene rubber (EPDM) can be used instead of silicon rubber. .
It is also possible to encapsulate the reinforcing fibers inside the tube main body and the outer peripheral member. Further, the inner surface of the tube body such as silicon rubber may be coated with a fluorine resin or the like.
When a material such as the above-described fluororesin is used for the tube body, excellent heat resistance and chemical resistance against acid or alkali chemicals can be obtained. In particular, when the tube of the present invention is applied to piping for flowing a fluid containing silicon, such as cosmetics, when a silicone rubber tube is used, a part of the inner surface peels or reacts with chemicals contained in the fluid and is contained in the tube However, the quality of the fluid flowing through the pipe can be stabilized by using the material having the chemical resistance described above.

Further, the outer peripheral member and the tube body may be made of different materials. At this time, when the outer peripheral member is formed of a material having higher strength or hardness than the tube main body, the rigidity of the outer peripheral member itself is increased, so that the durability of the entire tube for the pinch valve device can be improved.
Furthermore, you may form so that the thickness of an outer peripheral member may become larger than the thickness of a tube main body. Also in this case, since the outer peripheral member has higher rigidity than the tube main body against the mechanical pressing force from the pinch lever, there is an effect that the durability of the entire tube for the pinch valve device is improved as a result.

The pinch valve device equipped with the tube of the present invention is attached to the piping of a plant that produces, for example, liquid foodstuffs, milk drinks, medicines, cosmetics, etc., and supplies fluids that flow various fluids such as gas, liquid, powder, etc. Can be applied to the system.
Further, in the pinch valve device described above, the opening / closing operation of the valve is not only a selective switching between opening and closing, but also controls the opening of the valve by controlling the gap of the means for pinching, for example. Also good.

Further, the pinch valve device tube and the outer peripheral member of the present invention are not limited to the above-described embodiments, and various modifications and combinations are included.
In addition, the pinch valve device tube and the outer peripheral member of the present invention can be added to, deleted from, or replaced with other configurations within a range that does not depart from the technical idea of the present invention.

For example, the outer peripheral member may be formed as a laminated structure such as double or triple. Further, a plurality of outer peripheral members may be arranged in the longitudinal direction of the tube body, and the thickness of each outer peripheral member may be changed at that time.
Furthermore, you may use as a peripheral member what formed the hole or the notch in a part of cylindrical member. In such a case, by forming a hole or notch in a portion different from the position where the pinch lever contacts or where the expansion concentrates, the weight of the entire tube for the pinch valve device can be reduced while solving the problems of the present invention. Can be achieved. As an example thereof, for example, the outer peripheral member can be configured as a mesh member within a range in which the problem of the present invention can be solved.

DESCRIPTION OF SYMBOLS 1 Pinch valve apparatus 10 Valve body 20 Drive apparatus 100 1st valve housing 102 Piping attachment part 110 2nd valve housing 112 Piping attachment part 116 Support | pillar 120 Rotor 122 Gear part 124 1st cam peak 125 2nd cam peak 150 , 250 Pinch valve device tube 151, 251 Tube body 152, 252, 352, 452 Outer peripheral member 153, 253 Flange portion 160 Pinch lever 454 Reinforcement portion

Claims (5)

A cylindrical tube body, and at least one cylindrical outer peripheral member is mounted on the outer peripheral surface of the tube body, Ri Tona,
The outer peripheral member is a tube for a pinch valve device that is rotatably mounted on an outer peripheral surface of the tube main body .   The pinch valve device tube according to claim 1, wherein the tube body has a shape such that an outer diameter decreases from both longitudinal end portions toward an intermediate portion side. The tube for a pinch valve device according to claim 1 or 2 , wherein both the tube main body and the outer peripheral member are made of silicon rubber. The pinch valve apparatus provided with the tube for pinch valve apparatuses of any one of Claims 1-3 . A fluid supply system in which the pinch valve device according to claim 4 is attached to a pipe.

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