阅读说明：本技术 流量阻挡器、流量调节装置以及流量调节方法 (Flow rate stopper, flow rate adjusting device, and flow rate adjusting method ) 是由 古瀬昭男 须贺宣幸 于 2020-04-28 设计创作，主要内容包括：流量阻挡器(1)包括壳体(100)、管(200)以及调节器(300)。壳体具有包括第一孔部和第二孔部的通孔。管包括第一伸长部(200a)和在与第一伸长部的伸长方向不同的方向上延伸的第二伸长部(200b)。调节器有通孔。管被插入到壳体的通孔,第一伸长部位于第一孔部,第二伸长部位于第二孔部。调节器位于第二孔部并且能够朝向第二伸长部移动。调节器的通孔在第二孔部中将调节器和管之间的空间与流量阻挡器的外部连接。(The flow damper (1) comprises a housing (100), a tube (200) and a regulator (300). The housing has a through hole including a first hole portion and a second hole portion. The tube comprises a first elongated portion (200a) and a second elongated portion (200b) extending in a direction different from the direction of elongation of the first elongated portion. The regulator has a through hole. The tube is inserted into the through bore of the housing with the first elongated portion positioned at the first bore portion and the second elongated portion positioned at the second bore portion. The adjuster is located at the second bore portion and is movable toward the second elongated portion. The through hole of the regulator connects a space between the regulator and the pipe with the outside of the flow stopper in the second hole portion.)

1. A flow blocker, wherein,

the flow blocker includes:

a housing formed with a through-hole including a first hole portion and a second hole portion having a diameter larger than that of the first hole portion;

a tube comprising a first elongated portion and a second elongated portion extending in a direction different from the direction of elongation of the first elongated portion; and

an adjuster formed with a through-hole,

the tube is inserted into the through hole of the housing,

the first elongated portion is located at the first bore portion,

the second elongated portion is located at the second bore portion,

the adjuster is located at the second bore portion and is movable towards the second elongate portion,

the through hole of the regulator connects a space between the regulator and the pipe with an outside of the flow stopper in the second hole portion.

2. The flow resistor of claim 1,

the adjuster is in contact with the second elongate portion,

the cross-section of the first elongated portion, i.e. the cross-section orthogonal to the direction of elongation of the first elongated portion, is different from the cross-section of the second elongated portion, i.e. the cross-section orthogonal to the direction of elongation of the second elongated portion.

3. A flow damper as claimed in claim 1 or 2, wherein,

the second hole portion has an internal threaded portion,

the adjuster has an external thread portion corresponding to the internal thread portion.

4. A flow blocker according to any one of claims 1 to 3, wherein,

the direction of elongation of the first elongated portion is orthogonal to the direction of elongation of the second elongated portion.

5. A flow blocker according to any one of claims 1 to 4, wherein,

the flow blocker also comprises a gasket accommodated in the space.

6. A flow rate regulating device for regulating a flow rate of the flow rate damper according to any one of claims 1 to 5,

the flow rate adjusting device includes:

means for moving the regulator of the flow blocker towards the second elongated portion of the tube of the flow blocker; and

and a housing formed with an internal space for accommodating the flow rate block, a first through hole for connecting the internal space to the outside and inserting the device, a second through hole for connecting the internal space to the outside and serving as a flow path of the fluid supplied to the flow rate block, and a third through hole for connecting the internal space to the outside and serving as a flow path of the fluid flowing out of the flow rate block.

7. The flow regulating device of claim 6,

the flow regulating device includes a gasket that blocks between the housing and the device.

8. A flow rate regulating method for regulating a flow rate of the flow rate damper according to any one of claims 1 to 5,

the flow rate adjusting method includes a flow rate adjusting step of deforming the second extension of the tube of the flow damper by pressing the adjuster against the second extension of the tube of the flow damper.

9. The flow rate adjustment method according to claim 8,

the flow rate control step is performed while the flow rate control step is performed by providing the flow rate stopper in a flow path having no leakage and measuring the flow rate of the fluid passing through the flow rate stopper with a flow meter.

Technical Field

The invention relates to a flow blocker, a flow regulating device and a flow regulating method.

Background

The flow blocking device has a constricted flow path. When the fluid is supplied to the flow rate blocker at a predetermined pressure, the flow rate blocker sets the flow rate of the fluid discharged from the flow rate blocker to a predetermined value. The flow rate is, for example, a volume per unit time. Therefore, the flow damper can also be used as a reference for correcting the leakage flow rate. The flow blockers are also known to those skilled in the art as flow blocking nozzles, leak masters (leak masters), and the like.

For example, as shown in fig. 1, a flow damper disclosed in patent document 1 (japanese utility model application laid-open No. 03-105773) includes a tube 2, a gasket projection 7, a first metal body 12, a second metal body 13, and a protection tube 16.

The first metal body 12 has an external shape such as a truncated cone in which the diameter of one end of the first metal body 12 is smaller than the diameter of the other end of the first metal body 12. A cylindrical hole 12C is formed in one end of the first metal body 12. The hole 12C has an opening portion at one end portion of the first metal body 12 and has a central axis coincident with the central axis of the first metal body 12. A female screw 12B is formed at the other end portion of the first metal body 12. The internal thread 12B has a diameter larger than that of the hole 12C and has a central axis coincident with the central axis of the first metal body 12. The hole 12C communicates with the internal thread 12B via a dust-proof filter 17.

The second metal body 13 has a shape capable of recognizing three hollow cylindrical portions having different diameters and the same central axis. One hollow cylindrical end portion of the second metal body 13 is a male screw 13A corresponding to the female screw 12B, and the other hollow cylindrical end portion of the second metal body 13 is a male screw 13E. The center axis of the male screw 13A coincides with the center axis of the second metal body 13, and the center axis of the male screw 13E coincides with the center axis of the second metal body 13. A cylindrical through hole 13B having a central axis coincident with the central axis of the second metal body 13 is formed in the second metal body 13. The through hole 13B coincides with a space formed by connecting the hollow portion of the male screw 13E and the hollow portion of the hollow cylindrical central portion of the second metal body 13. The internal thread 13D is formed on the external thread 13A. The female screw 13D is aligned with the hollow portion of the male screw 13A. The internal thread 13D has a diameter larger than that of the through hole 13B and smaller than that of the external thread 13A, and has a central axis coincident with the central axis of the second metal body 13. The through hole 13B communicates with the internal thread 13D. The female screw 13C is formed in the second metal body 13. The female screw 13C has one opening portion on the outer peripheral surface of the second metal body 13 and the other opening portion on the through hole 13B.

The gasket protrusion 7 has a shape capable of recognizing two hollow cylindrical portions having different diameters and the same central axis. The hollow cylindrical end portion of the packing boss 7 is externally threaded corresponding to the internal thread 13D. A cylindrical through hole is formed in the gasket boss 7. The through hole of the pad projection 7 has one opening at one end of the pad projection 7, and has the other opening at the other hollow cylindrical end of the pad projection 7.

In a state where the spacer 4 having the through hole is accommodated in the female screw 13D, the spacer boss 7 is attached to the second metal body 13 through the female screw 13D of the second metal body 13 and the male screw of the spacer boss 7. In this state, the other end portion of the pad projection 7 presses the pad 4 against the second metal body 13. The central axis of the second metal body 13 coincides with the central axis of the gasket projection 7. The gasket 4 is, for example, an O-ring.

The linear pipe 2 is inserted into the through hole 13B of the second metal body 13, the through hole of the gasket 4, and the through hole of the gasket boss 7. One end of the tube 2 protrudes from the gasket projection 7, and the other end of the tube 2 protrudes from the second metal body 13.

The second metal body 13 to which the pipe 2 is attached to the first metal body 12 through the male screw 13A of the second metal body 13 and the female screw 12B of the first metal body 12. In this state, one end portion of the tube 2 is positioned inside the female screw 12B. The central axis of the second metal body 13 coincides with the central axis of the first metal body 12.

The protection pipe 16, which is a linear pipe, has a female screw at one end thereof corresponding to the male screw 13E of the second metal body 13. The second metal body 13 to which the pipe 2 is attached to the protective pipe 16 through the external thread 13E of the second metal body 13 and the internal thread of the protective pipe 16. The protective tube 16 has a length longer than the length of the portion of the tube 2 protruding from the second metal body 13, and therefore, the portion is covered with the protective tube 16.

The male screw 6 is inserted into the female screw 13C of the second metal body 13. By screwing the male screw 6 into the female screw 13C, the tip of the male screw 6 crushes the tube 2. The desired flow value is achieved depending on the extent of deformation of the tube 2.

This type of flow damper is also disclosed in, for example, patent document 2 (japanese patent laid-open No. 2013-170653).

In the conventional flow damper, an external force is applied to the tube 2 from a direction orthogonal to the extending direction of the tube 2 in order to deform the tube 2. As a means for applying an external force, an external thread is used. The pipe 2 having a long overall length is used in consideration of the diameter of the external thread, and therefore, it is difficult to miniaturize the flow damper.

Disclosure of Invention

The invention aims to provide a small flow damper and a technology for adjusting the flow of the flow damper.

The technical matters described herein are not intended to explicitly or implicitly limit the invention described in the scope of claims, and are not intended to be indicative of the possibility of such limitation by persons other than the persons who are interested in the invention (e.g., the applicant and the rights holder), but are described only for the purpose of facilitating understanding of the gist of the invention. The outline of the present invention from other points of view can be understood from the scope of claims at the time of application of the patent application, for example.

The tube of the flow blocker of the present invention includes a first extension and a second extension. The direction of elongation of the first elongate portion is related to the length direction of the flow blocker, i.e. the direction of flow of fluid through the flow blocker, but the direction of elongation of the second elongate portion is different from the direction of elongation of the first elongate portion. I.e. the tube is a bent tube. The second elongated portion is collapsed by the regulator to achieve the desired flow rate.

According to the present invention, since the bent tube is used, a small flow damper can be realized.

Drawings

Fig. 1 is a sectional view of a conventional flow damper.

Fig. 2 is a diagram showing the flow rate damper of the embodiment, and particularly, in fig. 2, (a) is a left side view of the flow rate damper of the embodiment, (b) is a sectional view of the flow rate damper of the embodiment, and (c) is a right side view of the flow rate damper of the embodiment.

Fig. 3 is a sectional view of the housing.

Fig. 4 is a front view of the tube.

Fig. 5 is a view showing the actuator, and particularly, in fig. 5, (a) is a sectional view of the actuator, and (b) is a side view of the actuator.

Fig. 6 is a view showing a gasket protrusion, and particularly, in fig. 6, (a) is a side view of the gasket protrusion, and (b) is a sectional view of the gasket protrusion.

Fig. 7 is a cross-sectional view of the flow resistor with the regulator slightly collapsing the tube.

Fig. 8 is a sectional view of a flow damper according to a modification.

Fig. 9 is a sectional view of a flow rate adjustment device of an embodiment.

Fig. 10 is a cross-sectional view of a first component of the housing.

Fig. 11 is a cross-sectional view of a second part of the housing.

Fig. 12 is a cross-sectional view of a third component of the housing.

Fig. 13 is a cross-sectional view of a fourth component of the housing.

Fig. 14 is a diagram showing a device, and particularly in fig. 14, (a) is a side view of the device, and (b) is a front view of the device.

Fig. 15 is a flow of flow rate adjustment processing in the embodiment.

Description of the reference numerals

1 flow stopper

2 tube

6 external screw thread

7 pad projection

12 first metal body

12B internal thread

12C hole

13 second metal body

13A external thread

13B through hole

13C internal thread

13D internal thread

13E external thread

16 protective tube

17 dustproof filter

100 case

100a central part

100ab wall

100b one end portion

100c another end portion

100ca external thread part

100d one end face

100e other end face

101 through hole

101a first hole part

101b second hole part

101ba internal thread part

101c third hole part

101cb internal thread part

200 tube

200a first elongated portion

200b second elongated portion

200c bending part

300 regulator

300a end face

300b external thread part

301 through hole

302 groove

400 liner

500 flow regulating device

510 device

520 casing

521 first part

5211 the central part

5211a peripheral surface

5212 an end part

5212a end face

5213 the other end

521a second through hole

521b third through hole

521c external thread part

521d internal screw thread part

521e internal screw thread part

521g external screw thread part

522 second part

522a internal thread part

522b internal thread part

522c through hole

523 third part

5231 an end part

5231a end face

5232 the other end

523a first through hole

523b annular recess

523c external thread part

523d bolt hole

524 fourth component

524a through hole

524b bolt through hole

541 shim

542 shim

543 pad

544 pad

590 inner space

700 gasket

800 pad projection

800a an end face

800b external thread part

801 through hole

802 groove

9CL center axis

9CL1 center axis

9CL2 center axis

9S space

Detailed Description

< flow damper >

The flow damper 1 of the embodiment includes a housing 100, a tube 200, a regulator 300, and a packing protrusion 800 (see fig. 2 to 7).

< housing >

In the present embodiment, the housing 100 is a hollow rod-shaped body in which the through hole 101 is formed and three portions, specifically, the central portion 100a, the one end portion 100b, and the other end portion 100c can be recognized.

The central portion 100a of the casing 100 has a hollow hexagonal prism shape having a central axis coincident with the central axis 9CL of the casing 100.

The one end portion 100b of the case 100 has a hollow cylindrical shape having a central axis coincident with the central axis 9CL of the case 100 and having an outer diameter substantially the same as the width of the opposite side of the central portion 100 a. One end of the one end portion 100b is an end surface 100d of the housing 100, and the other end of the one end portion 100b is located at a boundary between the central portion 100a and the one end portion 100 b.

The other end portion 100c of the housing 100 has a hollow cylindrical shape having a central axis coinciding with the central axis 9CL of the housing 100 and having an outer diameter smaller than the width of the opposite side of the central portion 100 a. One end of the other end portion 100c is located at a boundary between the central portion 100a and the other end portion 100c, and the other end of the other end portion 100c is the other end surface 100e of the housing 100. An external thread portion 100ca, which is a spiral groove, is formed on the outer peripheral surface of the other end portion 100 c.

Through hole 101 formed in case 100 has a cylindrical shape allowing three holes to be recognized, specifically, first hole 101a, second hole 101b, and third hole 101 c.

The cylindrical first hole portion 101a has a central axis coincident with the central axis 9CL of the housing 100, and has a diameter slightly larger than the outer diameter of a first elongated portion 200a of the tube 200 described later. The cylindrical second hole portion 101b has a central axis coincident with the central axis 9CL of the casing 100, and has a diameter larger than that of the first hole portion 101 a. The cylindrical third hole portion 101c has a central axis that coincides with the central axis 9CL of the case 100, and has a diameter larger than that of the first hole portion 101 a.

One end of the first hole 101a is located at the boundary between the central portion 100a and the one end portion 100b, and the other end of the first hole 101a is located near the center of the central portion 100 a.

The second hole 101b has substantially the same overall length as the overall length of the one end 100b of the housing 100. Here, "full length" is a length in the direction of the central axis 9 CL. One end of the second hole 101b is an opening located on one end surface 100d of the housing 100, and the other end of the second hole 101b is located at the boundary between the central portion 100a and the one end portion 100 b. A spiral groove, i.e., an internal thread portion 101ba, is formed on an inner peripheral surface of the one end portion 100b, i.e., an inner wall surface surrounding the one end portion 100b of the second hole portion 101 b.

The third hole 101c has a length longer than the length of the other end 100c of the case 100, one end of the third hole 101c is located near the center of the central portion 100a, and the other end of the third hole 101c is an opening located on the other end surface 100e of the case 100. A spiral groove, i.e., a female screw 101cb, is formed on the inner peripheral surface of the other end 100c, i.e., the inner wall surface surrounding the other end 100c of the third hole 101 c.

< pipe >

In the present embodiment, the tube 200 has a shape in which two elongated portions, specifically, a first elongated portion 200a linearly extending and a second elongated portion 200b linearly extending in a direction different from the extending direction of the first elongated portion 200a can be recognized. In the present embodiment, the extension direction of the first extension 200a is orthogonal to the extension direction of the second extension 200 b.

< regulator >

The regulator 300 has a hollow cylindrical shape. The cylindrical through hole 301 formed in the regulator 300 has a central axis coincident with the central axis 9CL1 of the regulator 300. A linear groove 302 is formed in one end surface 300a of the adjuster 300. In the present embodiment, one opening of the through hole 301 is located at the bottom of the groove 302. An external thread portion 300b, which is a spiral groove corresponding to the internal thread portion 101ba of the housing 100, is formed on the outer peripheral surface of the adjuster 300.

< pad projection >

The packing protrusion 800 has a hollow cylindrical shape. The cylindrical through hole 801 formed in the gasket projection 800 has a central axis coincident with the central axis 9CL2 of the gasket projection 800. A linear groove 802 is formed in one end surface 800a of the gasket projection 800. In the present embodiment, one opening of the through hole 801 is located at the bottom of the groove 802. An external thread portion 800b, which is a spiral groove corresponding to the internal thread portion 101cb of the case 100, is formed on the outer peripheral surface of the packing protrusion 800.

< Assembly >

In the flow rate damper 1, the packing (packing)400 having an outer diameter slightly larger than the diameter of the third hole 101c of the housing 100 is pushed into the depth of the third hole 101c, that is, the vicinity of the boundary between the third hole 101c and the first hole 101a by the packing protrusion 800 screwed into the third hole 101 c. The packing projection 800 is screwed into the third hole portion 101c by, for example, a screwdriver having a front end portion capable of entering the groove 802. A through hole having a diameter slightly smaller than the outer diameter of the tube 200 is formed on the gasket 400. The gasket 400 is, for example, an O-ring.

In the flow damper 1, the tube 200 is inserted into the through hole 101 of the housing 100. The first elongated portion 200a of the tube 200 is located in the first bore portion 101a of the housing 100 and the second elongated portion 200b of the tube 200 is located in the second bore portion 101b of the housing 100. More specifically, the curved portion 200c, which is a boundary between the first elongated portion 200a and the second elongated portion 200b, is located at a boundary between the central portion 100a and the one end portion 100 b. The second elongated portion 200b is in contact with the wall surface 100ab or is located adjacent to the wall surface 100 ab. Wall surface 100ab is a wall surface located at the boundary between first hole 101a and second hole 101b and surrounding one end of first hole 101 a.

In the present embodiment, the end of the first elongated portion 200a separated from the second elongated portion 200b passes through the through hole of the gasket 400, and as a result, is positioned at the through hole 801 of the gasket projection 800. Gasket 400 is in close contact with the inner peripheral surface of central portion 100a, that is, the inner wall surface of central portion 100a surrounding third hole 101c, and the outer peripheral surface of pipe 200. The gasket 400 maintains air-tightness or water-tightness between the first hole 101a and the third hole 101 c. In other words, the third hole portion 101c communicates with the second hole portion 101b via the through hole 801 of the packing projection 800 and the pipe 200.

The regulator 300 is located at the second hole portion 101 b. In this state, the central axis 9CL1 of the regulator 300 coincides with the central axis 9CL of the housing 100. Since the adjuster 300 has an externally threaded portion 300b that corresponds to the internally threaded portion 101ba of the housing 100, the adjuster 300 may be moved toward the second elongated portion 200b using suitable means. In this embodiment, such a device is a screwdriver having a tip that can enter the slot 302.

The adjuster 300 is moved by using the screwdriver so that the adjuster 300 is in contact with the second elongated portion 200 b. By further moving the adjuster 300, the adjuster 300 crushes the second elongated portion 200b (see fig. 7). As a result, the shape of the cross section of the first elongated portion 200a is different from the shape of the cross section of the second elongated portion 200b, and a desired flow rate value is achieved according to the degree of deformation of the second elongated portion 200 b. Wherein the cross-section of the first elongated portion 200a is a cross-section orthogonal to the direction of elongation of the first elongated portion 200a, and the cross-section of the second elongated portion 200b is a cross-section orthogonal to the direction of elongation of the second elongated portion 200 b.

The through hole 301 of the regulator 300 connects the space 9S between the regulator 300 and the pipe 200 in the second hole portion 101b with the outside of the flow damper 1. Therefore, the fluid flowing into the third hole portion 101c of the housing 100 can flow out of the second hole portion 101b to the outside of the flow resistor 1 via the through hole 801 of the packing protrusion 800, the tube 200, the space 9S, and the through hole 301 of the regulator 300. Alternatively, the fluid flowing into the second hole portion 101b may flow out of the third hole portion 101c to the outside of the flow resistor 1 via the through hole 301 of the regulator 300, the space 9S, the tube 200, and the through hole 801 of the packing projection 800.

The flow blocker 1 adopts the following structure: has the bent tube 200 and the second elongated portion 200b, which does not greatly contribute to the dimension in the length direction of the flow damper 1, i.e., the flow direction of the fluid passing through the flow damper 1, is crushed by the regulator 300. Therefore, the total length of the flow rate damper 1 can be shortened as compared with the total length of a conventional flow rate damper having a structure in which a linear tube is crushed in a direction orthogonal to the longitudinal direction of the flow rate damper. Since the flow rate damper 1 has a smaller size than a conventional flow rate damper, it is easy to directly attach the flow rate damper 1 to an inspection object having a female screw portion corresponding to the male screw portion 100ca or a male screw portion corresponding to the female screw portion 101 ba.

The flow rate damper 1 has a simpler structure than a conventional flow rate damper, and therefore, the flow rate damper 1 can be manufactured at a low cost. In an embodiment, the gasket protrusion 800 is not an essential structural element of the flow damper 1. In the case where the gasket projection 800 is not used, the gasket 400 is not required, and the number of parts can be further reduced. In this case, the tube 200 is attached to the first hole 101a of the housing 100 by, for example, an adhesive. However, by using the gasket projection 800, the tube 200 can be replaced. That is, since the tube 200 is not completely fixed to the housing 100, the tube 200 can be detached by detaching the adjuster 300 from the housing 100. For example, in the case where the flattened tube 200 is excessively crushed due to a mistake, the crushed tube 200 is replaced with a new tube, so that a reduction in the yield of the flow rate damper 1 can be avoided.

After the predetermined flow rate is reached, the regulator 300 is not moved. That is, the position of the regulator 300 when the flow rate reaches the predetermined flow rate remains in the second hole 101 b. By crimping second extension 200b of flat tube 200 with adjuster 300, backlash of the threads is eliminated, and as a result, a strong mechanical coupling of housing 100, tube 200, and adjuster 300 is achieved. Therefore, even when the flow rate damper 1 is used, the flow rate set at the time of assembly of the flow rate damper 1 can be maintained.

Since the flow damper 1 has the female screw portion 101ba, a hose joint having a male screw portion corresponding to the female screw portion 101ba can be connected. The flow rate of the flow damper 1 can be confirmed by connecting the hose joint to, for example, a flowmeter, not shown.

Since the flow damper 1 has the hexagonal prism-shaped central portion 100a, the flow damper 1 can be fastened with a wrench.

< modification example >

Instead of the above embodiment in which flat tube 200 is directly compressed by regulator 300, the following modification is also allowable. As shown in fig. 8, in a state where washer (washbher) 700 is accommodated in space 9S, flat tube 200 may be indirectly compressed by adjuster 300. The washer 700 is, for example, a flat washer. Since the washer 700 functions as a buffer, it is expected to prevent the tube 200 from being damaged by the regulator 300.

< flow rate adjusting apparatus/method >

Next, a flow rate adjusting device and a flow rate adjusting method for adjusting the flow rate of the flow rate damper 1 will be described.

The flow rate adjustment device 500 of the embodiment includes a device 510 and a housing 520 (refer to fig. 9 to 14).

< device >

As described above, device 510 is a device for moving adjustor 300 toward second elongate portion 200b, such as a screwdriver having a tip that can enter slot 302 of adjustor 300.

< housing >

The housing 520 includes: an internal space 590 housing the flow damper 1, a first through hole 523a connecting the internal space 590 with the outside of the flow control device 500 and into which the device 510 is inserted, a second through hole 521a connecting the internal space 590 with the outside of the flow control device 500 and serving as a flow path of the fluid supplied to the flow damper 1, and a third through hole 521b connecting the internal space 590 with the outside of the flow control device 500 and serving as a flow path of the fluid flowing out from the flow damper 1. In the present embodiment, the housing 520 is composed of 4 members 521, 522, 523, and 524.

< first Member >

The first member 521 formed with the cylindrical second through hole 521a and the L-shaped third through hole 521b is a hollow rod-shaped body capable of recognizing three hollow cylindrical portions having different diameters and the same central axis. A male screw 521c, which is a spiral groove, is formed on the outer peripheral surface of the hollow cylindrical one end portion 5212 of the first member 521, and a female screw 521d, which is a spiral groove corresponding to the male screw 100ca of the flow rate damper 1, is formed on the inner peripheral surface of the one end portion 5212, which surrounds the second through hole 521a, which is the inner wall surface of the one end portion 5212. One opening of the third through hole 521b is located on the end surface 5212a of the one end 5212 of the first member 521. The other opening of the third through hole 521b is located on the outer peripheral surface 5211a of the hollow cylindrical central portion 5211 of the first member 521. A female screw 521e, which is a spiral groove, is formed on an inner wall surface of the central portion 5211 surrounding the other opening portion of the third through hole 521 b. A male screw portion 521g, which is a spiral groove, is formed on the outer peripheral surface of the hollow cylindrical other end portion 5213 of the first member 521.

< second Member >

An internal thread portion 522a, which is a spiral groove, is formed on the inner circumferential surface of one end portion of the hollow cylindrical second member 522 in which the cylindrical through hole 522c is formed, that is, the inner wall surface surrounding the one end portion of the through hole 522 c. A female screw portion 522b, which is a spiral groove corresponding to the male screw portion 521c of the first member 521, is formed on the inner peripheral surface of the other end portion of the second member 522, that is, the inner wall surface surrounding the other end portion of the through hole 522 c.

< third Member >

The third member 523 in which the cylindrical first through hole 523a is formed is a hollow rod-shaped body capable of recognizing two hollow cylindrical portions having different diameters and the same central axis. At least two bolt holes 523d are formed in the hollow cylindrical one end portion 5231 of the third member 523. One opening of the first through hole 523a is located on the end surface 5231a of the one end 5231 of the third member 523. An annular recess 523b surrounding one opening of the first through hole 523a is formed in the one end 5231 of the third member 523. A male screw portion 523c, which is a spiral groove, is formed on the outer peripheral surface of the hollow cylindrical other end portion 5232 of the third member 523.

< fourth Member >

The fourth member 524 is a disk-shaped member formed with a through hole 524a and a bolt through hole 524 b.

< Assembly >

The flow rate stopper 1 is attached to the first member 521 by screwing the male screw portion 100ca of the flow rate stopper 1 into the female screw portion 521d of the first member 521. The air-or water-tightness between the first member 521 and the flow blocker 1 is maintained by a gasket (gasket)544 embedded in an annular recess formed at one end 5212 of the first member 521. The spacer 544 is, for example, an O-ring. The first member 521 is attached to the second member 522 by screwing the male screw portion 521c of the first member 521 to which the flow rate stopper 1 is attached to the female screw portion 522b of the second member 522. The air-tightness or water-tightness between the first member 521 and the second member 522 is maintained by a gasket 541 embedded in an annular recess formed in the central portion 5211 of the first member 521. The gasket 541 is, for example, an O-ring. The third member 523 is attached to the second member 522 by screwing the male screw portion 523c of the third member 523 into the female screw portion 522a of the second member 522. The air-tightness or water-tightness between the second member 522 and the third member 523 is maintained by a gasket 542 embedded in an annular recess formed at one end 5231 of the third member 523. The spacer 542 is, for example, an O-ring. The flow damper 1 is located in an inner space 590 surrounded by the first member 521, the second member 522, and the third member 523. In the present embodiment, the fourth member 524 is attached to the one end 5231 of the third member 523 by bolt fastening.

The fluid flowing into the second through hole 521a of the housing 520 passes through the flow resistor 1, the inner space 590 of the housing 520, and the third through hole 521b of the housing 520 in this order, and then flows out of the flow rate adjusting device 500.

< sequence >

A method of adjusting the flow rate of the flow damper 1 using the flow rate adjusting device 500, specifically, a method of setting the flow rate of the flow damper 1 to a desired flow rate is as follows (see fig. 15).

A hose nipple, not shown, is connected to the female screw portion 521e of the housing 520. The hose connector is connected to a flow meter, not shown. The other end 5213 of the first member 521 is connected to a constant-pressure fluid supply source, not shown, via a hose joint, not shown, or the like having a female screw portion that can be screwed into the male screw portion 521 g. The constant pressure fluid supply source can supply fluid at a constant pressure. The fluid is continuously supplied from the constant pressure fluid supply source to the flow resistor 1 through the second through hole 521a of the housing 520.

In a state where the device 510 is inserted into the through hole 524a of the fourth member 524 and the first through hole 523a of the third member 523, the leading end of the device 510 is fitted into the groove 302 of the regulator 300. The airtight or watertight between the case 520 and the device 510 is maintained by the packing 543 fitted into the annular recess 523 b. By rotating the device 510, the actuator 300 is moved towards the second elongated portion 200b of the tube 200 (step S1).

While the flow rate of the fluid passing through the flow damper 1 is measured by the flow meter, the regulator 300 is pressed against the second elongated portion 200b of the tube 200 (step S2). The flow rate changes as a result of the deformation of the second elongated portion 200 b. At the time the desired flow value is measured, operation of the device 510 is discontinued.

In the above embodiment, the dimensions of the thread may be JIS (Japanese Industrial Standards) or ISO (International organization for Standardization). For example, as the female screw portion 101ba of the flow damper 1, a female screw having a diameter of 5mm can be used.

As the device 510, a publicly known screwdriver may be used, but a screwdriver 510 shown in fig. 14 may also be used. Screwdriver 510 has a two-pronged front end. In a state where the tip of driver 510 is inserted into groove 302, the tip of driver 510 does not block the opening of through-hole 301 located at the bottom of groove 302. That is, screwdriver 510 may move regulator 300 without impeding continuous flow measurement.

< supplement >

In the claims and the description, unless otherwise specified, the term "connected" and all changes in form and expression of the term do not necessarily preclude the presence of one or more intervening elements between two elements that are "connected" to each other.

In the claims and specification, unless otherwise specified, the ordinal numbers do not limit the elements modified by or combined with the ordinal numbers to the order of the elements or the amounts of the elements. The use of ordinal numbers is used merely as a convenient expression for distinguishing two or more elements from each other unless otherwise specified. Thus, for example, the phrase "first X" and the phrase "second X" are expressions for distinguishing two xs, and do not necessarily mean that the total number of xs is 2, or that the first X must precede the second X. The term "first" does not necessarily mean "initially".

In the claims and specification, the words "comprise" and variations of the words, comprise "and" comprising "are used as non-exclusive expressions. For example, a sentence of "X includes a and B" does not deny that X includes a structural element (e.g., C) other than a and B. In addition, in the case where a certain sentence includes a sentence in which the term "includes" or a inflectional change thereof is combined with a negative word (for example, "does not include"), the sentence refers to only the target word. Thus, a sentence such as "X does not include a and B" recognizes the possibility that X includes structural elements other than a and B. Also, the term "or" is not intended to be an exclusive logical addition.

The embodiments of the present invention have been described above, but the present invention is not limited to these embodiments. Various changes and modifications are possible within a range not departing from the gist of the present invention. The embodiments were chosen and described in order to explain the principles of the invention and its practical application. The present invention is applicable to various embodiments with various modifications and variations, and the modifications and variations are determined by the intended use. All such changes and modifications are intended to be included within the scope of the present invention as defined in the appended claims, and are intended to be protected by the same unless the claims are interpreted in a manner consistent with the breadth to which they are fairly, legally, and equitably entitled.