JPH06331059A - Speed controller - Google Patents

Abstract

PURPOSE:To mount a speed controller on a narrow location by constituting a device such that a control valve element formed with a control hole in the axial line direction of a main unit part is provided movably in the axial line direction of the main unit part to variably obtain an opening area of the control hole by a needle-shaped point end part, so as to achieve miniaturization of size. CONSTITUTION:In this speed controller interposed between a tube 60a in a inflow side and a tube 60b in an outflow side, in the case of flowing a control flow from a condition that a control hole 32 of a control unit 30 is closed in a needle part 54 of a control valve element 52, a lock nut 26 is loosened, and a rotary adjusting member 16 is rotated to move the control valve element 52 in the right direction. Thus by drawing out the needle part 54 from the control hole 32, a clearance of circulating a fluid between the control hole 32 and the needle part 54 is formed, to generate the control flow of restricting a fluid pressure. This control flow is in a trend of partly advancing to the outside of the control unit 30 via passages 48a, 48b, but by closely attaching the peripheral edge of a diaphragm 50 to the internal peripheral surface of a flow path 28 by a fluid pressure, circulation of the fluid is impeded.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a speed controller, and more specifically, it passes a fluid as a control flow with a free flow in one direction and a flow rate in the other direction through a flow passage provided in a main body. Regarding the speed controller.

[0002]

2. Description of the Related Art A conventional speed controller will be described with reference to FIG. 6 (perspective view) and FIG. 7 (cross-sectional view). 1
00 is a main body, one end of which is open as a first opening 102 and the other end of which is open as a second opening. A flow path 106 that connects the first opening 102 and the second opening 104 is formed in the main body 100. The fluid flowing from the first opening 102 into the flow path 106 flows to the second opening 104 as a free flow whose flow rate is not regulated. Meanwhile, the second
The fluid flowing from the opening 104 into the flow path 106 flows to the first opening 102 as a control flow whose flow rate is regulated. Reference numeral 108 denotes a control body, which is fixed to the center of the flow path 106. The control body 108 is provided with a control hole 110 for passing a control flow in a direction perpendicular to the length direction of the main body 100. The free flow can pass between the control hole 110 and the outer peripheral surface of the control body 108 and the inner peripheral surface of the flow path 106.

Reference numeral 112 denotes a diaphragm, which is made of a flexible material having a cone shape. The diaphragm 112 is
The inner peripheral surface is fitted onto the control body 108 so as to be in close contact with the control body 108 in a gas-liquid tight manner. When the control flow passes through the flow passage 106, the outer peripheral edge of the diaphragm 112 closely adheres to the inner peripheral surface of the flow passage 106 in a gas-liquid tight manner so that the control flow can pass only through the control hole 110.
On the other hand, when the free flow passes through the flow passage 106, the diaphragm 112 receives the fluid pressure of the free flow and is elastically deformed, and the outer peripheral edge is separated from the inner peripheral surface of the flow passage 106, so that the free flow becomes the control hole 11.
0, and between the control body 108 and the inner peripheral surface of the flow path 106 can be passed.

Reference numeral 114 is a control valve element, which is disposed in the flow path 106. The control valve body 114 has a male screw portion 116 engraved on the outer peripheral surface of the upper portion thereof and is screwed to a female screw portion 118 engraved on the main body portion 100. When the control valve body 114 rotates about the axis, it can move in a direction perpendicular to the length direction of the main body 100 (direction of arrow X). Control valve body 11
The lower end of 4 is formed in the needle part 120,
It is possible to move back and forth into the control hole 110 of No. 8. The upper end of the control valve body 114 is projected outside the main body 100 and serves as an adjustment knob 122 when rotating. By rotating the adjusting knob 122, the amount of penetration of the needle portion 120 into the control hole 110 can be adjusted, and thus the flow rate of the control flow can be adjusted. Reference numerals 124a and 124b are joint portions, which are arranged in the first opening portion 102 and the second opening portion 104, respectively. Joints 124a, 124b
Tubes 126a and 126b for guiding a fluid are detachably connected to the.

In the conventional speed controller having the above structure, the free flow entering the flow passage 106 through the first opening 102 enters the adjusting chamber 130 through the passage 128a and passes through the control hole 110 from above to below. To do. At the same time, the free flow causes the outer peripheral edge of the diaphragm 112 to be elastically deformed by the fluid pressure to separate from the inner peripheral surface of the adjustment chamber 130 forming the flow path 106, and also between the control body 108 and the inner peripheral surface of the flow path 106. pass. The free flow passing through the inside and the outside of the control body 108 flows from the passage 128b to the second opening 104.
On the other hand, the control flow that has entered the flow path 106 through the second opening 104 enters the adjustment chamber 130 through the passage 128b and passes through the control hole 110 from above to below. The water flow that has proceeded to the outer peripheral side of the control body 108 presses the outer peripheral edge of the diaphragm 112 against the inner peripheral surface of the adjustment chamber 130, so that the flow is impeded. Therefore, the control flow whose flow rate is regulated by the control hole 110 flows from the passage 128a to the first opening 102.

[0006]

However, the above-mentioned conventional speed controller has the following problems. The control body 108 is fixed to the center of the flow path 106, and the control hole 110 is provided so as to extend in a direction perpendicular to the length direction of the main body 100. When the control valve body 114 rotates about the axis, the control valve body 114 moves in a direction perpendicular to the length direction (arrow X direction) of the main body 100, and the needle portion 120 causes the control body 108 to move.
The adjustment knob 122 is capable of moving back and forth into the control hole 110 of FIG. As a result, the adjustment knob 122 extends in a direction perpendicular to the length direction (arrow X direction) of the main body 100, so that the size inevitably increases in the same direction. Therefore, there is a problem that the mounting place is restricted. Further, since the control body 108 and the control hole 110 are arranged in the flow path 106 in the direction perpendicular to the length direction (the arrow X direction) of the main body portion 100, the flow path 106 is often bent, resulting in loss. There is a problem that the planned flow rate cannot be obtained because there are many occurrence points. Therefore, it is an object of the present invention to provide a speed controller which can be miniaturized and has less loss.

[0007]

In order to solve the above problems, the present invention has the following constitution. That is, in a speed controller that allows a fluid to flow in a flow path provided in the main body portion in one direction as a free flow and in the other direction as a control flow whose flow rate is controlled, in the main body portion, one end has a first opening. Part and the other end are formed in a straight cylindrical shape having an opening as a second opening, and the flow passage penetrates in the axial direction of the main body so as to connect the first opening and the second opening. A control hole for passing the control flow is provided in the flow passage in the axial direction of the main body, and the free flow is formed between the outer peripheral surface and the inner peripheral surface of the flow passage. A control body formed so as to be able to pass through is fixed, has a cone shape, and has an inner peripheral surface fitted to the control body in a gas-liquid tight contact, and the control flow passes through the flow path. In this case, the outer peripheral edge adheres to the inner peripheral surface of the flow path in a gas-liquid tight manner so that the control flow can pass only through the control holes. When the free flow passes through the flow passage, the outer peripheral edge separates from the flow passage inner peripheral surface to allow the free flow to pass between the control hole and the control body and the flow passage inner peripheral surface. A diaphragm is provided, and a control valve element is provided in the flow path, the control valve element being movable in the axial direction of the main body portion, and having a needle-shaped tip portion movable back and forth into the control hole. The part is provided with an adjusting mechanism for moving the control valve element in the axial direction of the main body part. In addition, in this speed controller, a joint portion for connecting a tube may be provided in the first opening portion and / or the second opening portion.

[0008]

[Operation] The operation will be described. The main body portion is formed in a linear tubular shape, and the flow path is provided so as to penetrate in the axial direction of the main body portion. A control hole for allowing a control flow to pass through is provided in the control body in the axial direction of the main body. Furthermore, the control valve body
It is movable in the axial direction of the main body within the flow path, and the needle-shaped tip is movable back and forth into the control hole of the control body that is provided in the axial direction of the main body. With this structure, a member extending in a direction perpendicular to the main body is unnecessary. In addition, it is possible to reduce the number of bends in the main body as much as possible.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT A preferred embodiment of the present invention will now be described in detail with reference to the accompanying drawings. FIG. 1 is a sectional view of a speed controller of the embodiment, FIG. 2 is a perspective view showing an appearance of the speed controller of the embodiment, and FIG. 3 shows a control body and a vicinity of a control valve body in the speed controller of the embodiment. FIG. 4 is a partially cutaway perspective view, and FIG. 4 is an exploded perspective view showing the structures of the control body, the control valve body, and the rotation adjusting member.

First, the structure will be described with reference to FIGS. Reference numeral 10 denotes a main body portion, which is a first main body constituent member 12
And a second body constituting member 14 and a rotation adjusting member 16. The main body portion 10 is formed in a straight tubular shape in which the right end portion of the first main body constituent member 12 is opened as the first opening portion 18 and the left end portion of the second main body constituent member 14 is opened as the second opening portion 20. Has been done. The first main body constituent member 12 and the second main body constituent member 14 are arranged apart from each other, and the rotation adjusting member 16 is
The first main body constituting member 12 and the second main body constituting member 14 are rotatably arranged around the axis while straddling the left end portion and the right end portion of the second main body constituting member 14. Sealing between the inner peripheral surface of the rotation adjusting member 16 and the outer peripheral surfaces of the first main body constituting member 12 and the second main body constituting member 14 is achieved by O-rings 22a and 22b. A male screw portion 24a is engraved on the outer periphery of the left end portion of the first main body constituting member 12, and a lock nut 26 is screwed on.

Reference numeral 28 denotes a flow path, which is provided in the axial direction of the main body 10 so as to linearly connect the first opening 18 and the second opening 20. In this embodiment, the control flow whose flow rate is regulated and controlled flows from the first opening 18 toward the second opening 20, and the free flow whose flow rate is not regulated flows from the second opening 20. It flows in the direction of the first opening 18.

Reference numeral 30 denotes a control body, which is arranged in the flow path 28. As shown in FIG. 4, the shape of the control body 30 is such that a control hole 32 for passing a control flow is formed in the main body portion 10.
It is transparently installed in the axial direction. Further, the front half of the control body 30 is formed into a cylindrical large diameter portion 34, a medium diameter portion 36, a small diameter portion 38, and a locking portion 40, and the latter half portion thereof is composed of two half cylindrical portions 42.
The slits 44a and 44b are formed on the upper and lower sides while being formed so as to face a and 42b. The semi-cylindrical portion 4
In order to prevent the right ends of 2a and 42b from approaching each other due to deformation, a restriction ring 46 is fitted to the inner periphery of the right ends of the semi-cylindrical parts 42a and 42b. The control body 30 includes the semi-cylindrical portion 4
The outer circumferences of 2a and 42b are engaged with the left end inner circumference of the first main body constituting member 12, and the outer circumference of the large diameter portion 34 is engaged with the right end inner circumference of the second main body constituting member 14. By these engagements, the first main body component 12 and the second main body component 1
The positional relationship of 4 can be fixed. A fluid (for example, compressed air, water, oil) can pass through the control hole 32 between the outer peripheral surface of the control body 30 and the inner peripheral surface of the flow path 28. Further, passages 48a and 48b communicating with the control hole 32 are provided through the middle diameter portion 36 of the control body 30.

A diaphragm 50 is made of an elastic material (for example, silicone rubber) and is formed in a cone shape.
The diaphragm 50 is an outer peripheral surface of the small diameter portion 38 of the control body 30, and is fitted in a gas-liquid tight manner between the middle diameter portion 36 and the locking portion 40. When the control flow passes through the flow passage 28, the outer peripheral edge of the diaphragm 50 closely adheres to the inner peripheral surface of the flow passage 28 in a gas-liquid tight manner, so that the control flow can pass only the control hole 32 of the control body 30. When the free flow passes through the passage 28, the diaphragm 50 is elastically deformed by the fluid pressure so that the outer peripheral edge is the passage 28.
The free flow is allowed to pass between the control hole 32 of the control body 30 and the outer peripheral surface of the control body 30 and the inner peripheral surface of the flow path 28 while being separated from the inner peripheral surface. As the diaphragm 50, in addition to the shape shown in the figure, the actual fairness 4-47504, the real fairness 4-4
The thing which provided the rib for reinforcement disclosed in No. 7505 etc. on the outer peripheral surface, and the thing which provided the cap for curling up can also be used.

Reference numeral 52 is a control valve element, which is disposed in the flow path 28. The control valve body 52 is formed in the shape clearly shown in FIGS. 3 and 4. That is, the left end portion is formed in the tapered needle portion 54, and both side surfaces of the central portion and the right end portion are formed in the flat portion 56. The right end portion of the control valve body 52 is always locked in the slits 44a and 44b of the control body 30 to prevent rotation. Further, a male screw portion 24b is formed on the outer peripheral surface of the right end portion, and the rotation adjusting member 16
Is threadedly engaged with the female screw portion 60 formed on the inner peripheral surface of the.

When the rotation adjusting member 16 which is an example of the adjusting mechanism is rotated, the control valve body 52, which is prevented from rotating, is movable in the axial direction of the main body 10 along the slits 44a and 44b. The needle portion 54 is the control valve body 52.
It is possible to move back and forth into the control hole 32 of the control body 30 with the movement of. The cross-sectional area of the clearance through which the fluid can pass in the control hole 32 changes depending on the amount of the needle portion 54 entering the control hole 32, so that the flow rate of the control flow and the like can be regulated and controlled. When the flow rate of the control flow or the like reaches a desired value via the rotation adjusting member 16, the lock nut 26 can be tightened to fix the rotation position of the rotation adjusting member 16. Reference numerals 58a and 58b are joint portions, and the first opening portion 1
8 and the second opening 20 respectively.
A tube 60a for flowing a fluid to the joint portions 58a, 58b,
60b is connected. Note that the joint portions 58a, 58b
Is a known pipe joint with a release ring (for example,
No. 7795) is adopted, the tubes 60a, 60
b is removable.

Next, the operation of the speed controller of the embodiment will be described with further reference to FIG. The state shown in FIG. 1 is a state in which the needle portion 54 of the control valve body 52 closes the control hole 32 of the control body 30. In this state, when the control flow is going to flow from the first opening 18 toward the second opening 20, the fluid enters the flow path 28 through the first opening 18 and the inner peripheral surface of the flow path 28. And the flat surface portion 56 of the control valve body 52, but since the needle portion 54 closes the control hole 32, the flow proceeds from the passages 48a and 48b to the outside of the control body 30. However, due to the pressure of the controlled flow, the diaphragm 50
The outer peripheral edge of the airtightly adheres to the inner peripheral surface of the flow path 28 in a gas-liquid tight manner to prevent the flow of the control flow. As a result, the control flow becomes immobile.

On the other hand, in the state of FIG.
When attempting to flow from the opening 20 toward the first opening 18, the fluid enters the flow path 28 through the second opening 20.
However, since the needle portion 54 closes the control hole 32, the fluid advances to the outside of the control body 30 and elastically deforms so that the diaphragm 50 is reduced in diameter by the fluid pressure. Then, the outer peripheral edge of the diaphragm 50 separates from the inner peripheral surface of the flow path 28, the free flow passes between the outer peripheral surface of the control body 30 and the inner peripheral surface of the flow path 28, and the passages 48a, 48b and the flow path 28 inside. The first opening 18 is passed through between the peripheral surface and the flat portion 56 of the control valve body 52.
Flow in the direction.

In the state shown in FIG. 1, when a control flow whose flow rate and fluid pressure are regulated to a predetermined amount is passed, the lock nut 26 is first loosened, and then the rotation adjusting member 16 is moved to a predetermined position on the outer peripheral surface of the main body 10. And the control valve body 52 is moved to the right. With this movement, the control hole 3 of the needle portion 54
By reducing the amount of penetration into the inside of the nozzle 2, a clearance through which a fluid can pass is generated between the inner peripheral surface of the control hole 32 and the outer peripheral surface of the needle portion 54 (state of FIG. 5). Then, the control flow that flows from the first opening 18 toward the second opening 20 enters the flow path 28 from the first opening 18, and part of the control flow goes out of the passages 48 a and 48 b to the outside of the control body 30. move on. However, due to the pressure of the control flow, the outer peripheral edge of the diaphragm 50 comes into close contact with the inner peripheral surface of the flow path 28 in a gas-liquid tight manner to prevent the flow.
As a result, the control flow proceeds between the inner peripheral surface of the flow passage 28 and the flat surface portion 56 of the control valve body 52, passes through the clearance between the inner peripheral surface of the control hole 32 and the outer peripheral surface of the needle portion 54, and passes through the control hole. Three
It becomes possible to flow toward the second opening 20 via only 2.

Therefore, the inner peripheral surface of the control hole 32 and the needle portion 5
4 Adjust the clearance cross-sectional area between the outer peripheral surface and the rotation adjusting member 1
6, when the flow rate of the control flow reaches a desired value, the lock nut 26 is tightened to fix the rotation position of the rotation adjusting member 16 and the position of the control valve body 52, thereby controlling the constant flow rate. It becomes possible to flow.

Incidentally, in the state shown in FIG. 5, a part of the free flow is controlled by the control hole 32 opened from the second opening 20.
Through the clearance and the inner peripheral surface of the flow path 28 and the flat surface portion 56 of the control valve body 52 toward the first opening portion 18. The rest of the free flow proceeds to the outside of the control body 30 and is elastically deformed by fluid pressure so as to reduce the diameter of the diaphragm 50, passes between the outer peripheral surface of the control body 30 and the inner peripheral surface of the flow path 28, and passes through the passages 48a and 48b. , And the inner peripheral surface of the flow path 28 and the control valve body 52
Flows toward the first opening 18 via the space between the flat surface 56 and the flat surface 56. Although various preferred embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments, and it goes without saying that many modifications can be made without departing from the spirit of the invention. .

[0021]

When the speed controller according to the present invention is used, the main body portion is formed in a straight cylindrical shape, and the flow passage is provided in the axial direction of the main body portion. A control hole for allowing a control flow to pass through is provided in the control body in the axial direction of the main body. Further, the control valve body is movable in the axial direction of the main body portion in the flow path, and the needle-shaped tip portion is
It is possible to move back and forth into a control hole of a control body that is provided so as to be axially provided in the main body. With this configuration, a member extending in a direction perpendicular to the main body is unnecessary, so that the size can be reduced and the device can be mounted in a narrow place.
Further, since it is possible to reduce the number of bent portions of the flow path as much as possible, energy loss is small, and the control flow can be efficiently controlled, which is a remarkable effect.

[Brief description of drawings]

FIG. 1 is a sectional view showing an embodiment of a speed controller according to the present invention.

FIG. 2 is a perspective view showing an appearance of a speed controller of the embodiment.

FIG. 3 is a partially cutaway perspective view showing the vicinity of a control body and a control valve body in the speed controller of the embodiment.

FIG. 4 is an exploded perspective view showing the structures of a control body, a control valve body, and a rotation adjusting member in the speed controller of the embodiment.

FIG. 5 is a cross-sectional view showing a state in which the control valve element is moved in the speed controller of the embodiment.

FIG. 6 is a perspective view showing an appearance of a conventional speed controller.

FIG. 7 is a cross-sectional view showing a conventional speed controller.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Main body part 16 Rotation adjusting member 18 1st opening part 20 2nd opening part 28 Flow path 30 Control body 32 Control hole 50 Diaphragm 52 Control valve body 54 Needle part 58a Joint part 58b Joint part

Claims (2)

[Claims] 1. A speed controller that allows a fluid to pass through a flow path provided in a main body portion as a control flow having a free flow in one direction and a flow rate controlled in the other direction, wherein one end of the main body portion is One opening, the other end of which is formed as a linear tube having an opening as a second opening, and the flow path connects the first opening and the second opening to the axis of the main body. And a control hole for allowing the control flow to pass therethrough in the axial direction of the main body portion while the free flow is provided on the outer peripheral surface and the inner periphery of the flow channel. A control body formed so as to be able to pass between the control surface and the surface is fixed, has a cone shape, and the inner peripheral surface is fitted to the control body so as to be gas-liquid tightly fitted to the control body. When passing through, the outer peripheral edge adheres to the inner peripheral surface of the flow channel in a gas-liquid tight manner, and the control flow passes only through the control hole. When the free flow passes through the flow passage, the outer peripheral edge separates from the inner circumferential surface of the flow passage to allow the free flow to pass between the control hole and the control body and the inner circumferential surface of the flow passage. A diaphragm is provided, and a control valve element that is movable in the axial direction of the main body portion and has a needle-shaped tip portion that can be moved back and forth into the control hole is provided in the flow path. A speed controller characterized in that an adjusting mechanism for moving the control valve element in an axial direction of the main body is provided in the main body. 2. The speed controller according to claim 1, wherein a joint portion for connecting a tube is provided in the first opening portion and / or the second opening portion.