JPH0483994A - Flow rate regulating device - Google Patents

Abstract

PURPOSE:To perform smooth and rapid opening and closing of a flow passage at an ordinary period by forming a flow rate regulating device by using a straight tubular outer shell and a spindleform core having two ends supported by respective spacers 4 and engaged with the longitudinal wrinkles of the straight tubular outer shell and varying the area of a gap between the longitudinal wrinkle and the longitudinal wrinkle of the spindleform core through contraction deformation of the straight tubular outer shell. CONSTITUTION:A flow rate regulating device has a straight tubular outer shell 1 and a core 3 supported by spacers 4 and 4 located at the interior. The straight tubular outer shell 1 is slightly reduced in size toward a central part 1b, and longitudinal wrinkles 2, 2... are formed in parallel to a central axis. The spindleform core 3 has two ends which are slenderized and supported to spacers 5 and 5 located in the outer shell 1. A longitudinal wrinkle 4 engaged with the longitudinal wrinkle 2 of the straight tubular outer shell 1 is peripherally formed in the outer surface of the central part of the spindleform core 3. The longitudinal wrinkles 2 and 4 of the straight tubular outer shell 1 and the spindleform core 3 are engaged with each other to form a gap, and a smooth flow passage is ensured. As a result, a flow passage is formed in a radiant shape at an ordinary period, and a smooth flow almost prevented from production of turbulence can be ensured.

Description

[Detailed description of the invention] [Industrial application field]

The present invention relates to a flow rate regulating device for fluid flowing through piping.

[Conventional technology]

Generally, the flow rate of fluid flowing through piping is controlled by valves such as globe valves and gate valves. However, conventional globe valves have complicated streamlines and large flow resistance even when fully open, and gate valves have a smooth flow path when fully open, but have the disadvantage of taking time to fully close.

[Problem to be solved by the invention]

The present invention is based on the new idea of making it possible to adjust the flow rate by contracting and deforming the straight tubular outer shell in the direction of the central axis. and to enable prompt opening and closing.

[Means to solve the problem]

The present invention provides a straight tubular outer shell in which a plurality of regular longitudinal wrinkles are formed in the circumferential direction, both ends of which are supported by spacers provided inside the straight tubular outer shell, and a plurality of the straight tubular outer shells. It is composed of a spindle-shaped core in which a plurality of regular vertical wrinkles are formed in the circumferential direction to engage with the longitudinal wrinkles of the strips, and the straight tubular outer shell is compressed and deformed in the central axis direction of the straight tubular outer shell. The gap area between the vertical wrinkles of the shell and the vertical wrinkles of the spindle-shaped core is made variable. The vertical wrinkles of the straight tubular outer shell and spindle-shaped core described above are formed parallel to the central axis direction or spirally, and the shape of the vertical wrinkles is a series of curves that are convex above the inflection point and concave below. , it is best to make the wrinkles deeper as they get closer to the center.

[Effect]

As described above, since the straight tubular outer shell has a plurality of regular vertical wrinkles, it is easily contracted and deformed in the direction of the central axis by external force. On the other hand, since the spindle-shaped core, whose both ends are supported by spacers provided inside the straight-tubular outer shell, is also formed with vertical wrinkles that engage with the vertical wrinkles of the straight-tubular outer shell, When the shell is contracted and deformed in the direction of the central axis,
The flow rate is adjusted by narrowing the flow path, which is the gap between the straight tubular outer shell and the spindle-shaped core. Close. In other words, the spindle-shaped core plays a role equivalent to the valve seat in the case of a normal valve, and the straight tubular outer shell plays a role equivalent to the valve body for the valve seat.

【Example】

In the cross-sectional view of FIG. 1 showing an embodiment of the present invention, this flow rate regulating device has a straight tubular outer shell 1 and a spacer 4.4 provided inside the straight tubular outer shell 1, which supports both ends thereof. It has a core 3. As can be seen from the external view shown in FIG. 2, the straight tubular outer shell 1 has a circular cross section at both ends 1a and la, but the diameter is slightly reduced toward the central portion 1b, and the circumferential surface thereof is circular. A plurality of vertical wrinkles 2, 2, . . . with gradually increasing depth are formed parallel to the central axis direction. As shown in FIG. 4, the vertical wrinkles 2 are formed by a series of curved lines that are convex above the inflection point P and concave below. As shown in FIG. 1, the spindle-shaped core 3 becomes thinner toward both ends, and both ends are positioned by being supported by spacers 5.5 provided inside the outer shell 1. Needless to say, the spacer 5 has through holes 6, 6...
・ is drilled (see Figure 3). This spindle-shaped core 3
A plurality of regular vertical wrinkles 4 that engage with a plurality of vertical wrinkles 2 of the straight tubular outer shell 1 are formed in the circumferential direction on the outer surface of the central portion of the tube. The straight tubular outer shell 1 and the spindle-shaped core 3 described above are used by being incorporated into a piping system as shown in FIG. 1, and if necessary, a bellows 7 shown by a dotted line is incorporated into the piping system. In a normal state, the straight tubular outer shell 1 and the spindle-shaped core 3 have Mm2.4 engaged with each other to form a radial gap between them, as shown in FIG.
This gap ensures a substantially straight and smooth flow path. If a compressive force such as gas pressure or a band is applied from the outside near the central part of the straight tubular outer shell 1 where the vertical wrinkles 2 are formed, the central part of the straight tubular outer shell 1 will contract and deform toward the central axis. . On the other hand, the spindle-shaped core 3 side remains unchanged regardless of the above-mentioned external force. Therefore, depending on the magnitude of the external force applied from the outside near the center of the straight tubular outer shell 1, the straight tubular outer shell 1
It is possible to close the flow path by bringing the vertical wrinkles 2 into close contact with the vertical *4 of the spindle-shaped core 3, or to adjust the flow rate by narrowing the gap. When the straight tubular outer shell 1 contracts in the radial direction, it tends to contract slightly in the axial direction, but the bellows 7 expands to allow this. In the above example, the vertical wrinkles 2 of the straight tubular outer shell 1 and the vertical wrinkles 4 of the core 3 are formed parallel to the central axis, and the binding compressive force is applied from the outside of the location where the vertical wrinkles 2 of the straight tubular outer shell 1 are formed. By adding it, the straight tubular outer shell 1 was contracted and deformed in the central axis direction. However, the present invention is by no means limited to this, and as shown in FIG. When two straight tubular outer shells 1.1 are connected in series and a rotational force as shown by the arrow is applied to the central connection part 8, the left and right straight tubular outer shells 1.1 are twisted, and each center part becomes constricted. It shrinks and deforms. Even in this case, the same opening/closing adjustment of the flow path as described above can be performed in two stages.

【Effect of the invention】

As is clear from the above, the flow regulating device of the present invention is extremely simple in structure, but normally the flow channels are formed radially, and the streamlines are hardly disturbed and the flow is smooth. It is better than a globe valve in that it can be secured. Also, since the displacement required to close the valve is not large, it is superior to the Kate valve in that it can be closed quickly.

[Brief explanation of drawings]

Fig. 1 is a sectional view showing an embodiment of the flow regulating device according to the present invention, Fig. 2 is a perspective view of its straight tubular outer shell, Fig. 3 is a plan view of a spacer, and Fig. 4 is a straight tubular outer shell. FIG. 5 is a cross-sectional view showing the vertical wrinkles and the vertical wrinkles of the spindle-shaped core, and FIG. 5 is a perspective view showing the specifications of another embodiment. 1... Straight tubular outer shell, 2.4... Vertical wrinkles, 3... Spindle-shaped core, 5... Spacer.

Claims (1)

[Claims] 1. A straight tubular outer shell (1) in which a plurality of regular vertical wrinkles (2) are formed in the circumferential direction, and a spacer (5) provided inside the straight tubular outer shell (1). ) and (5), and a plurality of regular vertical wrinkles (4) are formed in the circumferential direction to engage with the plurality of vertical wrinkles (2) of the straight tubular outer shell (1). and a spindle-shaped core (3), and the straight tubular outer shell (1).
Due to contraction and deformation in the central axis direction, the straight tubular outer shell (1
) and the vertical wrinkles (4) of the spindle-shaped core (3) are variable in area of the gap. 2. Regular multiple vertical wrinkles (2) and (4) are formed parallel to the central axis direction or spirally, and the shape of the vertical wrinkles is a curved line that is convex above the inflection point and concave below. 2. The flow regulating device according to claim 1, wherein the wrinkles become deeper as they approach the center. 3. The shrinkage deformation of the straight tubular outer shell (1) in the central axis direction is as follows:
2. The flow adjustment device according to claim 1, wherein the flow adjustment is performed by applying a tightening compressive force from outside of a portion where the vertical wrinkles (2) are formed parallel to the central axis direction. 4. Two straight tubular outer shells (1) (1) are connected in series so that the directions of the spiral vertical wrinkles (2) (4) are opposite to each other, and the straight tubular outer shell (1) 2. The flow regulating device according to claim 1, wherein the contraction and deformation in the central axis direction is performed by applying a rotational force in the circumferential direction to the connecting portion.