JP2000314479A - Pinch valve - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a non-washing type valve for a container or piping for liquid difficult in washing and a container available when food fluid is handled. SOLUTION: A pinch valve has a structure where the intermediate drum part of a valve body 1 provided at two ends with coupling mechanisms is brought into external pressure contact cut-off in a radial direction by upper and lower clamps 8 and 9 formed of a cylindrical elastic sleeve. The two end parts of a sleeve 6 are fitted in guide pipes 5 each joined with the inside diameter part of a body flange 4 and provided at an external part with a protrusion part 5a, and the guide pipes are brought into a slidable and locking state in the direction of an interface axis. Furthermore, the drum part of the sleeve 6 forms expansion contraction structure, an interface drum part distance is variable and compression at an intersmall face distance is practicable. Moreover, a disposal linear for contact liquid is easily mounted and demounted to form a valve which eliminates the need for washing.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION It is widely used as a non-cleaning valve for containers or general industrial piping.

[0002]

2. Description of the Related Art Conventional pinch valve shutoff methods are classified into a mechanical type and an air or hydraulic type. Particularly, in a mechanical shutoff type, the structure is very simple. The length of the sleeve must cover the elongation of the main body at the time of compression, so that the distance between the faces is long, and the shaft height is high, so that there are many restrictions on applications.

[0003]

The pinch valve according to the present invention belongs to a conventional pinch valve having a mechanical structure for shutting off powder, and further reduces the distance between the surfaces of the valve body. In addition, the valve is designed to be compact by lowering the shaft height and to eliminate restrictions on use space and operation, and at the same time, to have a structure in which a cylindrical liner such as resin can be easily attached and detached inside the valve body. It is also an object of the present invention to eliminate the need for cleaning of the container itself and to achieve cleaning-free use of both the container and the valve by using it as a valve for a lower discharge port of a transport container or the like.

[0004]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention relates to a conventional method of compressing and expanding an elastic rubber cylindrical straight tube (hereinafter referred to as a sleeve) constituting a valve body from the outside. The pinch valve's face-to-face distance and overall height are made compact to minimize piping space and operational constraints, and a liquid-contact cylindrical liner such as polyethylene film is installed inside, or this valve is a 1000-liter class. Attach it to the lower discharge or injection outlet of the medium container, extend the lower nozzle of the inner bag of polyethylene film, etc. and penetrate this valve as well, and remove it from the container, so that these containers and valves are not cleaned. In this valve, firstly, the expansion allowance required when the valve body sleeve is radially compressed by a clamp from above and below is reduced by the conventional distance between faces. Instead of the required length, by joining a guide tube of a predetermined length in the axial direction of the connection mechanism inner diameter part such as the flange at both ends, by fitting both ends of the sleeve to this guide tube and sliding it in the axial direction The body length can be varied, and the sleeve can be easily compressed with a smaller surface tube distance to shut off the internal fluid. Since the body of the present valve thus configured is cylindrical and the internal fluid cutoff is a simple external compression structure, it is possible to set and operate the liner in this valve without any resistance or obstruction. It is possible and easy to put on and take off. Or,
It is also possible to use a seal film using an elastic material together. In this case, the guide tube is extended to provide a protruding portion protruding outside the surface of the flange, and the tip of the liner is folded back to be set so that it can be attached and detached. It is also possible to form the liner with a flange without providing the projection and to connect to an external pipe by abutting the outer surface of the valve. In addition, the same applies to the case where the nozzle of the inner bag of the container is extended and attached and detached, but in this case,
The protrusion may be only one. Further, the pinch valve of the present invention has a structure in which the end of the sleeve can be bent and stretched, and
It is also possible to provide a structure in which a locking mechanism is provided to lock the guide tube. Also, the valve of the present invention can be provided with bellows-like fold structures on both sides or one side except for the central compression portion of the sleeve to expand and contract the body of the sleeve itself. In this case, it is also possible to mount a sealing tube inside. In the valve of the present invention, the main body body is provided as an unreinforced sleeve made of an elastic material, both ends are connected to a flange or the like, and a reinforcing flexible outer cylinder such as a loose waterproof cloth is attached to the outside thereof. Then, the sleeve can be expanded and contracted. In addition, the main body sleeve may be provided in a flat shape by compressing the central portion in the initial shape, or the outer surface portion of the main body sleeve and the clamp portion may be bound to take measures against negative pressure at the time of fluid discharge. You can also. Further, the outer compression blocking structure by the upper and lower clamps of the sleeve is provided with concave and convex engagement shapes of the respective clamps, and a tangential cross section of the inner diameter portion in the axial direction when the sleeve is compressed forms a waveform. In this way, it is possible to more reliably perform the interruption.
Alternatively, the valve of the present invention is provided as a shaft having a double rotating structure of a hollow outer bolt and an inner bolt in order to shorten the shaft length of the body pressure expanding / contracting bolt, and a nut and a stay attached to an outer thread portion of the outer bolt are provided. And the lower clamp via the connecting bolt,
In addition, the inner bolt and the upper clamp are connected and formed so as to be interlocked with each other in the opposite direction, so that the overall height of the valve can be reduced. Alternatively, it is also possible to adopt a structure in which the upper clamp can be tightened in one direction by extending the outer clamp in two steps by rotating the outer screw and the inner screw as reverse screws. Further, the upper and lower clamps can be provided in a pantograph shape with both sides having a hinge structure to compress the body. Alternatively, the lower clamp may be fixed to the lower part of the trunk, and the upper clamp may be compressed in the lower direction via hinges on both sides.

[0005]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The pinch valve of the present invention constructed as described above will be described with reference to the drawings. FIG. 1 is a partially cutaway perspective view of a pinch valve body 1, and FIG. The figure shows a state where one side is compressed. A guide pipe 5 of a predetermined length is joined in the direction between the inner surfaces of the flanges 4 as a both-end connecting mechanism fixed by the upper frame 2 and the lower frame 3, and this guide is provided. Both ends of a sleeve 6 containing a reinforcing material 6a made of an elastic material such as rubber are fitted to the pipe 5 so as to be slidable by fitting both ends. The upper clamp 8 and the lower clamp 9 of the sleeve 6 are rotated by rotating a bolt shaft 7. When compressed in conjunction with each other, the length of the body of the sleeve 6 can be varied to form an extension allowance to easily perform fluid shutoff, and the distance between the surfaces of the valve body 1 can be reduced. .

In the pinch valve 1 of the present invention thus constructed, the upper clamp 8 sandwiching the sleeve 6 is moved downward by the rotation operation of the bolt shaft 7 which is freely rotatably connected, and at the same time is connected to the stay 10. The lower clamp 9 moves upward through the connecting bolt 13 by the simultaneous rotation, compresses the sleeve 6, and allows the fluid to be shut off. At this time, the guide pipe 5 is joined to the inner diameter of the flange 4, and the slide pipes 6 b provided at the inner diameters of both ends of the sleeve 6 are slidably fitted to each other, so that the length of the body surface between the two flanges 4 can be changed. 6 has a structure in which a necessary distance at the time of external compression is formed without difficulty. In addition, a locking mechanism A is provided on both sides, and a projection 5a is provided to extend outside the flange 4 surface of the guide tube 5, and a liner 14 is attached and detached inside the valve 1. Figure 3
As described above, the liner 14 is provided at a required length when the sleeve 6 is compressed, and its end is folded back at the protrusion 5a to be fitted to the flange 4, and the gasket 15 is addressed from above. A complete seal can be obtained by connecting to an external pipe or a hose 16 flange. At the same time, the gap B is formed so as to be able to be sealed. Therefore, the cleaning operation can be eliminated by removing the liquid contacting liner 14 from the inside of the valve 1 after the completion of the cargo handling operation of the internal fluid. In addition, a flange may be formed in the liner 14 itself in advance, and in this case, the protrusion 5a is not required. Further, the lower nozzle of the inner bag for the container can be extended and penetrated into the valve 1 to perform the same mounting and dismounting. In this case, the protrusion 5a may be provided on one side. .

FIG. 4 shows that the guide tube 5 is grooved D and a split ring 17 is fitted thereon to provide a locking mechanism, while a bending portion C and a tapered ring 6 are provided at the end of a sleeve 6A.
c is provided, and both ends are fitted and locked. Of course, the liner 14 can be attached and detached as described above.

FIG. 5 shows a second embodiment of the present invention, in which a bellows-shaped expansion / contraction portion E is provided on at least one of the trunk portions of the sleeve 6B other than the central compression portion.
B has its body formed to be stretchable. In this case, it is effective to provide a structure in which flanges 6d are provided at both ends of the sleeve 6B and fixed or locked to the main body flange 4 portion. Alternatively, it is also possible to use together with the slide structure. In the case where the flange 6d is provided at both ends of the sleeve 6B, the gap B is not formed.

FIG. 6 shows a structure in which the lower clamp 9 is fixed to the lower frame 3 and the upper clamp 8 is moved so as to block the fluid by compressing and shutting off the center of the body of the sleeve 6B. In this case, the upper and lower clamps 8 and 9 can be bent as a hinge 23 structure.

FIG. 7 shows a third embodiment of the present invention, which is characterized in that a central portion of a sleeve 6C is provided in a flattened shape F which has been compressed in advance, so that the fluid can be blocked more effectively. That's what I'm trying to do.

FIG. 8 shows a fourth embodiment of the present invention. The sleeve 18 is molded from an elastic material such as rubber without a reinforcing layer so that the sleeve 18 itself can be freely expanded and contracted. It has a structure in which a flexible outer cylinder 19 such as cloth is covered, and in this case, the end of the outer cylinder 19 is bound to a member such as a spring 20 which has both expansion and contraction and pressure resistance. still,
The end of the spring 20 is fixed to the flange 4.

FIG. 9 shows a fifth embodiment of the present invention. A handle 21 is joined to the upper and lower outer surfaces of the sleeve 6 and connected to the upper and lower clamps 8 and 9 using a connecting member 22, respectively. It is formed to withstand pressure fluid discharge operation.

FIG. 10 shows a sixth embodiment of the present invention. The purpose of the sixth embodiment of the present invention is to increase the shape of the upper and lower clamps for compressing the sleeve so that the fluid shutoff effect can be further ensured. The cross-sectional shape in the axial direction of the upper clamp 8A that is in contact is provided in a concave shape, and the same cross-sectional shape in the lower clamp 9A is provided in a convex shape, so that the contact portion tangent of the inner diameter portion of the sleeve 6 compressed by the engagement of the two clamps. Waveform G in axial direction
To enhance the local compression. In particular, when the liner 14 and the like are used inside, there is an effect that the wrinkles and the like can be absorbed. Further, the concave portion may have a three-point structure.

FIG. 11 is for the purpose of simplifying the structure of the pinch valve 1 of the present invention, and includes upper and lower clamps 8A and 9A.
The part is configured as a hinge 23 so as to be bendable, and the sleeve 6 is configured to be compressed by rotating the bolt shaft 7. In this case, the compression member 24 is crimped to the lower clamp 9A with the caulking screw 25 to achieve complete compression.

FIG. 12 shows a seventh embodiment of the present invention. The bolt shaft 7 for operating the upper and lower clamps 8 and 9 for compressing the sleeve 6 has a double rotating shaft structure to shorten the shaft length. In FIG. 12A, a double rotating shaft structure of a hollow outer bolt 7A and an inner bolt 7B provided with screws inside and outside is used to make the whole shape compact. The stay 10 is connected to the screw portion, the inner screw portion is reversely screwed, and the inner bolt 7B is inserted and rotatable,
In addition, by simultaneously rotating the inner bolt 7B as a structure for fixing the tip portion of the inner bolt 7B to the upper clamp 8A, the axial length is reduced by half and the vertical pressure can be expanded and reduced only by operating the handle 11. In FIG. 12B, a rotary shaft structure is provided in which an intermediate bolt 7C is further provided between the hollow outer screw bolt 7C and the inner bolt 7B, and the handle 1 of the outer screw bolt 7C is provided.
1, the stay 10 is pulled up, the inner bolt 7D is provided with an inner screw, and the inner bolt 7 is fixed to the upper clamp 8A.
B is pressed down to compress. In FIG. 12C, the upper clamp 8A is intended to provide a large movable stroke with a small number of screw rotations, and the outer screw portion of the hollow outer bolt 7A is connected to the upper frame 2 of the main body 1 to form the outer bolt 7A itself. Is moved up and down, and at the same time, the inner bolt 7B fixed to the upper frame 2 is extruded in two steps to achieve compression. The inner screw is provided on the reverse screw with respect to the outer screw.

In the pinch valve of the present invention constructed as described above, the both-end connecting mechanism can be of a flange type, or, though not shown, can be connected to a mating pipe by a screw type using an adapter. .

According to the present invention, since the body has a cylindrical sleeve and a structure for shutting off the external pressure contact of the sleeve, the valve is frequently used and is disposable as a valve under conditions that require cleaning. Since the inner tube is formed so that it can be easily attached and detached, the following effects can be expected. (1) Cleaning of the valve itself can be completely eliminated. (2) Therefore, the labor required for cleaning can be saved, and the workability can be improved. (3) Since different kinds of liquids can be handled freely, quality control can be performed with confidence. (4) The sanitary control is easy and it is optimal for fluid foods. (5) Since it is a mechanical shut-off system, it is suitable for storage and transportation. (6) Since the design and shape are compact, it can be applied to a medium-sized container, and the cleaning of both containers can be realized. (7) Restrictions on the space of general industrial piping can be eliminated.

[Brief description of the drawings]

FIG. 1 is a perspective view of a partially cutaway valve body.

FIG. 2 is a side sectional view of the same, showing a state where one side is compressed.

FIG. 3 is a partially enlarged front cross-sectional view showing a connection state between a valve end and a mating hose.

FIG. 4 is a partially enlarged front sectional view showing a state in which a valve end is bent and stretched.

FIG. 5 is a front partial cross-sectional view in which a sleeve body has an elastic structure.

FIG. 6 is a front sectional view in which the lower clamp is fixed and the sleeve is compressed by the upper clamp, and one side shows a compressed state.

FIG. 7 is an enlarged front partial cross-sectional view in which a central portion of a sleeve body is compressed into a flat shape in an initial shape.

FIG. 8 is a front sectional view in which a sleeve is formed only of an elastic material and covered with a loose flexible outer cylinder, and one side shows a compressed state.

FIG. 9 is a front sectional view showing a state in which the outer surface of the sleeve and the clamp are fixed by a connecting member.

FIG. 10 is an enlarged front partial cross-sectional view showing a state in which upper and lower crumb cross sections are provided in irregularities and a sleeve is compressed into a waveform.

FIG. 11 is a side sectional view showing a one-side compressed state in which the upper and lower clamps have a hinge structure.

FIG. 12A is a partial side sectional view showing the operation of the upper and lower clamps on the left and right with the bolt shaft having a double rotation shaft structure. B is a side sectional view showing the operation of the upper and lower clamps on the left and right sides with the bolt shaft having a triple rotation shaft structure. C is a partial side sectional view showing the operation of the upper clamp on the left and right by connecting the outer bolt shaft to the fixed frame and rotating the inner bolt to project the inner bolt.

[Explanation of symbols]

1; valve body 2; upper frame
3; lower frame 4; flange 5; guide tube 5
a; protruding part 6; sleeve 6A;
B: trunk flexion / extension type sleeve 6C; trunk compression / flat type sleeve 6a; reinforcing material 6
b; slide tube 6c; taper ring 6d; sleeve flange
7; bolt shaft 7A; hollow outer bolt 7B; inner bolt 7
C: Hollow external screw bolt 7D; Intermediate bolt 8; Upper clamp 8
A; concave upper clamp 9; lower clamp 9A; convex lower clamp 1
0; stay 11; handle 12: bolt guide 1
3; connecting bolt 14; inner tube 15; gasket 1
6; connecting hose 17; split ring 18; elastic sleeve 1
9; flexible outer cylinder 20; spring 21; handle 2
2; connecting member 23; hinge 24;
5; caulking screw A; locking mechanism B; gap C;
Flexing part D; Grooving part E; Elastic part F;
Flat part G; corrugated part

Claims (7)

[Claims] 1. A connecting mechanism for fixing a distance between surfaces at both ends, an intermediate body is provided as a reinforced tubular sleeve made of an elastic material such as rubber, and the sleeve body is bolted from outside using a clamp or the like. In a pinch valve for flowing powder formed to be openable and closable in the inner diameter portion by being radially compressed by a shaft rotation operation, a guide tube with a locking mechanism is joined to the inner diameter portion of the both-end connection mechanism in an axial direction between faces. And a protrusion for mounting a cylindrical liner is provided outside, and the end of the sleeve is fitted to the guide tube so as to be slidable in the axial direction, or provided with a bending and stretching portion for locking. At the time of external compression of the sleeve body,
A pinch valve wherein the length of the in-plane body portion is variable in the axial direction. 2. The valve according to claim 1, wherein both ends of said sleeve are fixed or locked to said connecting mechanism, and a bellows-like expansion / contraction mechanism is provided at an intermediate portion of said sleeve body. The pinch valve according to claim 1, characterized in that the sleeve itself is configured to be able to change its body length in the axial direction when externally compressed. 3. The valve for an externally-compressed flow powder of the sleeve body portion according to claim 1, wherein the sleeve is formed into a flat shape in which an initial shape is formed and a central portion thereof is radially compressed. The pinch valve according to claim 1, wherein the pinch valve is configured as follows. 4. A valve for an externally-compressed flow powder of a sleeve body portion, wherein said sleeve is formed as an elastic sleeve and fixed to a both-end connecting mechanism, and a reinforced waterproof cloth or the like is provided outside said sleeve. 4. The pinch valve according to claim 1, wherein the flexible outer cylinder is loosely mounted, and the outer cylinder is configured to be able to expand and contract in the radial direction together with the sleeve when externally compressed. 5. In the valve for flowing powder, the upper and lower outer surface portions of the sleeve for shutting off the external compression and the upper and lower clamps are fixed using connecting members so that the sleeve is not closed at the time of negative pressure for discharge. 3. The pinch valve according to claim 1, wherein 6. The fluid powder valve, wherein the upper and lower clamps for cutting off the external compression of the sleeve are provided with a cross section facing each other in a concave and a convex engagement shape, 5. A structure in which the cross-sectional shape of the tangent to the contact portion of the inner diameter portion of the sleeve when is compressed forms a waveform in the axial direction.
6. The pinch valve according to claim 5. 7. In the above vertical clamp type fluid powder valve, the sleeve pressure expansion / contraction bolt shaft has a double rotating shaft structure comprising a hollow outer bolt and an inner bolt, and each of the outer bolt and the inner bolt is provided. To the lower and upper clamps, or to the body frame and the upper clamps, the upper and lower clamps are both turned in the opposite direction by rotating the outer bolt shaft,
7. The pinch valve according to claim 1, wherein the upper clamp is formed so as to be movable up and down. 8.