JP5284547B1 - Flow rate adjusting device and flush valve provided with the same - Google Patents

Abstract

The present invention provides a flow rate adjusting device having a small number of components and capable of adjusting a flow rate with a simple operation, and a flush valve equipped with the flow rate adjusting device.
A flow rate adjusting device 10 having a tubular device body 11 and an adjustment member 25 in the device body 11, wherein the device body 11 includes a first opening 15 and a first opening 15. The second opening 16 having a smaller diameter, and a communication passage 17 through which the first opening 15 and the second opening 16 communicate with each other, and the adjustment member 25 is a cylinder having an outer diameter larger than the second opening 16. Formed on the one side, having an inflow opening 29 on one side, an outflow opening 30 on the other side, and a flow passage 31 through which the inflow opening 29 and the outflow opening 30 communicate with each other. A part and a part inside the communication path 17 of the instrument body 11 are engaged so as to be able to move in the communication path 17 and to stop at a predetermined position in the communication path 17. The adjusting member 25 is moved in the communication passage 17 and the inner diameter of the outflow opening 30 is changed.
[Selection] Figure 2

Description

  The present invention relates to a flow rate adjusting device for adjusting a flow rate flowing in a pipe and a flush valve equipped with the same, and a flow rate adjusting device with a small number of parts that can be easily installed and adjusted in a simple operation during construction. The present invention relates to a flash valve provided with the same.

  2. Description of the Related Art In recent years, various devices are known for the purpose of saving water used in toilets and the like from the viewpoint of effective use of water resources and energy saving. In addition, since the appliance aiming at such water saving comes to be installed in a distribution pipe, a construction contractor mainly performs installation work. At this time, it is a problem that the contractor can easily install equipment for saving water, and can easily adjust the flow rate. In particular, the flow rate adjustment means often require different flow rates and water pressures in the water distribution pipes depending on the installation location and equipment, so that it is possible to easily adjust the flow rate according to the installation location and equipment during construction. Has been.

  As an invention for solving such a problem, for example, Patent Document 1 below discloses an invention of a water-saving adjusting valve capable of obtaining a water-saving effect. As shown in FIG. 6A, a water-saving adjusting valve 50 disclosed in Patent Document 1 below has a tapered surface 53a having a small diameter from one end portion toward the other end portion, and a plurality of tapered surfaces 53a are formed on the tapered surface 53a. An adjustment frame 51 in which guide grooves 54 are provided along the axial direction, and the number of adjustment arms 55 equal to the number of the guide grooves 54 protrude from the central gathering portion at an angle equal to the arrangement of the guide grooves 54. The adjustment valve 52 is housed in the adjustment frame 51 so as to divide the water passage 53 into a plurality of parts and the position of the adjustment frame 51 can be adjusted in the axial direction. The amount of water in the water passage 53 is adjusted according to the position of the adjusting valve 52.

  By setting it as such a structure, as for the water-saving adjustment valve 50 disclosed by the following patent document 1, while the minimum area part enclosed between the internal diameter of the water flow path 53 and the adjustment arm 55 adjacent is ensured, water flow amount, By changing the position of the adjustment valve 52 by the tapered surface 53a of the water passage 53, the area of the minimum area portion is changed, and the amount of water corresponding to the water pressure can be secured.

  Moreover, the water-saving adjustment valve 50 disclosed in Patent Document 1 below is used by being incorporated in a flash valve. That is, as shown in FIG. 6B, in the flush valve 62 for the toilet that operates the handle 61, the water saving adjustment is performed inside the union joint 66 that connects the vacuum breaker 64 and the discharge pipe 65 of the valve case 63 that houses the main valve. The valve 50 is incorporated, and the water-saving adjusting valve 50 is accommodated in the discharge pipe 65, and the outer casing 51a is sandwiched between the inner cylinder end of the vacuum breaker 64 and the end of the discharge pipe 65 connected by the nut 67. Thus, the water saving adjusting valve 50 is fixedly arranged.

  By adopting such a configuration, when flush water is allowed to flow during the stool, the water-saving adjustment valve 50 can maintain the washing effect by maintaining a constant amount of water regardless of the water pressure and greatly reduce the water pressure. It is said that a water-saving effect can be obtained without making it happen.

Japanese Patent No. 3806422

  However, in the water-saving adjustment valve disclosed in Patent Document 1, the amount of water is adjusted by moving the guide valve provided in the adjustment frame. However, this adjustment is also provided in the adjustment frame. Since the adjusting arm of the adjusting valve is only accommodated in the guide groove, the adjusting valve may move from the position adjusted by the water pressure. In addition, when it is set as the structure which an adjustment valve does not move easily with water pressure, it will become difficult to move in the case of adjustment, and there exists a possibility that it may become difficult to adjust water quantity.

  Further, in Patent Document 1, as an example of another water-saving adjustment valve, for example, as shown in FIG. 7A, the adjustment valve 52 moves due to fluctuations in water pressure, and the water amount is automatically adjusted according to the water pressure. A configuration in which a spring 56 is incorporated in the water-saving adjusting valve 50 is described. However, if the amount of water is automatically adjusted according to the water pressure, there is a risk that the amount of water that is originally required for the place where it was installed may not be obtained. There is a risk that it will not flow. In addition, it is difficult to select a spring for each installation location so that the water pressure at the installation location and the required amount of water can be obtained.

  Similarly, in Patent Document 1, as an example of another water-saving adjustment valve, as shown in FIG. 7B, a support bar 57 having a screw hole at the center of the adjustment frame 51 at a position downstream of the adjustment frame 51. And adjusting the position of the adjustment valve 52 downstream by screwing the adjustment screw 58 that receives the downstream end of the adjustment valve 52 at the tip thereof. Is disclosed. However, adjusting the position of the adjustment valve that can obtain the amount of water that matches the water pressure of the water passage to be used with the adjustment screw means that the adjustment screw is provided at the downstream end until the amount of water is obtained. Since it is necessary to repeatedly attach and detach the water conduit to be used, it is a very time-consuming work. In addition, since the adjusting screw is used, the number of parts may increase and the manufacturing cost may increase. Furthermore, the adjustment screw may fall off while using the water-saving adjustment valve, and the adjustment screw dropped into the pipe may cause problems in other structures.

  Similarly, in Patent Document 1, as an example of still another water-saving adjustment valve, a step 59 and an adjustment valve 52 formed at the downstream end of the guide groove 54 in the adjustment frame 51 as shown in FIG. 7C. In the meantime, there is disclosed a configuration in which an adjustment plate 60 is provided which has a shape substantially coinciding with the downstream end face of the adjustment valve 52 and adjusts the downstream position of the adjustment valve 52. However, when the adjustment plate is provided, the amount of water can be adjusted only in steps, and it becomes difficult to finely adjust the amount of water. Moreover, since the number of parts increases as described above, the manufacturing cost may increase.

  The present invention has been made to solve such problems of the conventional technology, and an instrument for adjusting the flow rate is composed of an instrument body and an adjustment member, and the adjustment member can be moved in the instrument body. It is possible to adjust the flow rate by moving this adjusting member, and it is easy to install in the pipe, and the flow rate can be adjusted by simple operation, and a flow adjustment device with a small number of parts is required. The purpose is to provide.

In order to solve the above-mentioned problem, a flow rate adjusting device according to a first aspect of the present invention includes a tubular device main body installed in a pipe, an adjustment member provided in the device main body for adjusting the flow rate, and A flow control device provided with
The instrument main body includes a first opening disposed on the upstream side of the pipe, a second opening having a smaller diameter than the first opening disposed on the downstream side, the first opening, and the second A communication path that communicates with the opening,
The adjusting member is formed of a cylindrical body having an outer diameter larger than at least the second opening, and is disposed on one side on the first opening side and on the other side on the second opening side. An outflow opening, and a flow passage through which the inflow opening and the outflow opening communicate with each other,
At least a part of the outer periphery of the adjustment member and at least a part of the inside of the communication passage of the instrument body are movable in the communication passage and can be stopped at a predetermined position in the communication passage. Is engaged,
The size of the inner diameter of the outflow opening is changed by moving the adjustment member in the communication path.

  Further, the flow rate adjusting device of the second aspect is the flow rate adjusting device of the first aspect, and on the outflow opening side of the adjusting member, there is a variable portion in which the size of the flow path is changed, The size of the inner diameter of the outflow opening is changed in accordance with the change of the changing portion.

The flow rate adjusting device according to the third aspect is the flow rate adjusting device according to the second aspect, wherein the communication path has a smaller diameter than the first opening portion from the second opening portion toward the first opening portion. A small-diameter passage having a predetermined length at least larger than the second opening is provided,
When the adjusting member is moved in the communication passage and the outflow opening is inserted into the small diameter passage, the varying portion is pressed and varied by at least a part of the small diameter passage.

Further, the flow rate adjusting device according to the fourth aspect is the flow rate adjusting device according to the third aspect, wherein a cylindrical movable portion having a predetermined length is provided between the inflow opening portion side of the adjusting member and the varying portion. Formed,
Between the first opening of the instrument body and the small diameter passage, a cylindrical engagement portion formed from the first opening toward the inside of the instrument body is formed.
The outer peripheral side of the movable part and the inner peripheral side of the engaging part are engaged.

  Further, the flow rate adjusting device according to the fifth aspect is the flow rate adjusting device according to the fourth aspect, wherein the engagement between the engaging portion and the movable portion is screwed.

  Further, the flow rate adjusting device according to the sixth aspect is the flow rate adjusting device according to any one of the third to fifth aspects, wherein the small diameter passage of the communication passage is reduced in diameter toward the second opening side. It is characterized by that.

The flush valve of the seventh aspect is a flush valve having piping,
The flow adjusting device according to any one of the first to sixth aspects is provided in the pipe.

  By providing the above configuration, the present invention has the following excellent effects. That is, according to the flow rate adjusting device of the first aspect, the flow rate in the installed pipe is adjusted by moving the adjustment member in the communication passage of the device body and changing the inner diameter of the outflow opening of the adjustment member. In addition, since the adjusted flow rate can be kept constant by locking the adjustment member at the adjusted position, a desired flow rate can be obtained with a single flow rate adjusting device. Therefore, it is not necessary to prepare a plurality of instruments for adjusting different flow rates, and the manufacturing cost can be suppressed. Furthermore, since the flow rate can be adjusted when the flow rate adjusting device is installed in the pipe, the flow rate can be finely adjusted at the installation site.

  Further, according to the flow rate adjusting device of the second aspect, the inner diameter of the outflow opening can be changed by changing the changing portion provided in the adjusting member for adjusting the flow rate. In addition, in order to make this fluctuation | variation part easy to fluctuate, at least 1 slit which follows an axis line can also be formed in a fluctuation | variation part.

  Further, according to the flow rate adjusting device of the third aspect, the fluctuation of the outflow opening of the adjusting member causes the changing portion to be pressed against a part of the small diameter passage formed in the tool main body by moving the adjusting member. Therefore, the flow rate can be easily adjusted without increasing the number of parts.

  Further, according to the flow rate adjusting instrument of the fourth aspect, the inner peripheral side of the engaging part of the instrument main body and the outer peripheral side of the movable part of the adjusting member are movably engaged. The flow rate can be adjusted by moving in the communication path.

  Further, according to the flow rate adjusting device of the fifth aspect, since the movable portion and the engaging portion are screwed together, the adjustment member can be easily moved and positioned and fixed by rotating the adjustment member. Will be able to. Moreover, since the adjustment member can be moved according to the pitches of the formed screw threads and screw grooves by screwing the movable part and the engaging part, the degree of change of the variable part can be finely adjusted. As a result, the flow rate can be finely adjusted, the structure can be simplified, and the manufacture can be easily performed.

  Further, according to the flow rate adjusting device of the sixth aspect, the small-diameter passage formed in the communication passage is reduced in diameter, so that the fluctuation of the adjustment member and the movement of the outflow opening can be smoothly performed. become able to.

  According to the flash valve of the seventh aspect, it is possible to provide a flash valve that exhibits the effect of the flow rate adjusting device of any one of the first to sixth aspects. In addition, since the flow rate adjusting device can be hung around the pipe when it is placed in the pipe by forming a flange on the outer periphery of the apparatus main body, the installation can be easily performed. Further, by providing at least one annular elastic member on the outer periphery of the instrument body, liquid leakage can be suppressed when the flow rate adjusting instrument is installed in the pipe. When the elastic member is provided, an annular groove is formed on the outer periphery of the instrument body, and the elastic member is fitted into the groove.

1A is a perspective view of the flow rate adjusting device of the embodiment, and FIG. 1B is a cross-sectional view taken along line IB-IB in FIG. 1A. FIG. 2A is a perspective view during flow rate adjustment of the flow rate adjusting device of the embodiment, and FIG. 2B is a cross-sectional view taken along the line IIB-IIB in FIG. 2A. 3A is a cross-sectional view of the instrument body, and FIG. 3B is a cross-sectional view of the adjustment member. FIG. 4A is a cross-sectional view showing the middle of the assembly of the flow control device, and FIG. 4B is a cross-sectional view after the flow control device is assembled. 5A to 5C are cross-sectional views illustrating a state in which the flow rate is adjusted. FIG. 6A is an exploded perspective view showing a conventional water-saving adjusting valve, and FIG. 6B is a partial cross-sectional front view showing a conventional flush valve. 7A to 7C are views showing other configurations of the conventional water-saving adjusting valve.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. However, the embodiment described below exemplifies a flow rate adjusting device for embodying the technical idea of the present invention and a flash valve equipped with the same, and is intended to specify the present invention thereto. Rather, it is equally applicable to other embodiments within the scope of the claims.

[Embodiment]
A flow control device 10 according to an embodiment will be described with reference to FIGS. As shown in FIGS. 1 and 2, the flow rate adjusting device 10 of the embodiment is composed of a device body 11 formed of a cylindrical body having a passage through which a liquid can flow in the center and an adjusting member 25, The flow rate is adjusted by moving the adjustment member 25 with respect to the instrument body 11. The flow rate adjusting device 10 is attached to a pipe (corresponding to the discharge pipe 65 in FIG. 6B) through which the liquid flows, and the flow rate of the liquid flowing through the pipe is adjusted. In the embodiment, the pipe whose flow rate is adjusted is disposed and used in a flush valve provided in a toilet or the like (see the flush valve 62 for a toilet bowl in FIG. 6B).

  First, as shown in FIGS. 1, 2 and 3A, the instrument body 11 has a top surface 12 disposed on the upstream side of the pipe on one side and a bottom surface 13 disposed on the downstream side of the pipe on the other side. It is formed of a hollow cylindrical body having a predetermined thickness and having an outer peripheral surface 14 where the upper surface 12 and the bottom surface 13 are connected. Further, a first opening 15 having a predetermined diameter is formed on the upper surface 12 of the instrument body 11, and a second opening having a smaller diameter than the first opening 15 is formed on the bottom surface 13. 16 is formed. A communication passage 17 is formed inside the instrument body 11 so as to communicate the first opening 15 and the second opening 16. In addition, the upper surface 12 and the bottom surface 13 of the appliance main body 11 here are based on the state shown in FIG. 3A, and the flow rate adjusting member can be used sideways or upside down depending on the installation location. In this case, the upper surface may face the horizontal direction or the lower side, and the bottom surface may face the horizontal direction or the upper side in the same manner.

  In the communication path 17, a cylindrical engagement portion 18 is formed inward from the first opening 15, which is substantially the same diameter as the first opening 15 and has a predetermined length. The engaging portion 18 is a portion that is engaged with a part of an adjusting member 25 described later and is a movable range in which the adjusting member 25 is moved. As shown in FIG. 3A, the engaging portion 18 is formed up to a position beyond the central portion of the instrument body 11. Furthermore, a screw thread or a thread groove is formed on the inner peripheral side of the engaging portion 18 so that it can be screwed into an adjusting member 25 described later.

  Further, a small-diameter passage 19 is formed in the communication passage 17 from the end of the engaging portion 18 on the opposite side to the first opening 15 to the second opening 16. The small diameter passage 19 is a reduced diameter portion 20 that is reduced in diameter toward the second opening 16. An annular stepped portion 21 is formed at the boundary between the engaging portion 18 and the small-diameter passage 19 of the communication passage 17, and a part of an adjusting member 25 to be described later is brought into contact therewith, so It becomes a regulated part.

  An annular flange portion 22 that protrudes in parallel with the upper surface 12 is formed on the outer peripheral surface 14 on the upper surface 12 side of the instrument body 11. When the flange portion 22 is installed in the pipe, the flange portion 22 is a portion to be hooked on a part of the pipe. Further, at least one groove 23 for forming an annular elastic member 24 such as an O-ring or packing is formed on the outer peripheral surface 14 of the instrument main body 11. In FIG. 3A, an O-ring is fitted in the groove 23 as the elastic member 24.

  Next, as shown in FIGS. 1, 2, and 3 </ b> B, the adjustment member 25 includes an upper surface portion 26 in which an inflow opening 29 into which a liquid flows is formed and liquid inflow from the inflow opening 29 in the other. A flow passage 31 is formed to connect the upper surface portion 26 and the bottom surface portion 27, and the inflow opening portion 29 and the outflow opening portion 30 communicate with each other. It is comprised with the cylindrical body of the predetermined thickness which has the side part 28 formed. And this adjustment member 25 has the upper surface part 26 arrange | positioned at the 1st opening part 15 side of the instrument main body 11, and the bottom face part 27 is arrange | positioned at the 2nd opening part 16 side of the instrument main body 11. 11 communication paths 17 are arranged. Since the adjustment member 25 is provided in the communication passage 17 of the instrument body 11, the adjustment member 25 is sized to fit into the first opening 15 and has an outer diameter that is at least larger than the second opening 16 of the instrument body 11. .

  The inflow opening 29 of the adjustment member 25 is formed with a movable part 32 that is shorter than the engaging part 18 that is engaged and moved with the engaging part 18 formed in the communication path 17 of the instrument body 11. Has been. In addition, a thread groove or a thread is formed on the outer peripheral side of the movable part 32 so that it can be screwed with the thread or the thread groove formed on the inner peripheral side of the engaging part 18 of the instrument body 11. Yes. In addition, at least one fitting groove 33 into which a member for rotating the adjustment member 25 is fitted is formed inside the movable portion 32.

  Further, between the movable portion 32 and the outflow opening 30 of the adjustment member 25, a variation portion 34 is formed in which the size of the flow passage 31 is elastically varied by being pressed. The variable portion 34 is formed thinner than the movable portion 32, and at least one slit 35 is formed in the axial direction, and is easily elastically deformed.

  Further, at the boundary between the movable portion 32 and the varying portion 34, a restricting portion 36 that contacts the step portion 21 of the instrument body 11 is formed in a step shape. Since the movable portion 32 is formed thicker than the variable portion 34, a portion where the movable portion 32 is formed thicker than the variable portion 34 can be used as the restricting portion 36.

  As with the instrument body 11, the upper surface portion 26 and the bottom surface portion 27 of the adjustment member 25 are based on the state shown in FIG. 3B. Depending on the installation location, the flow adjustment member can be used sideways or upside down. In this case, the upper surface portion may face the lateral direction or the lower side, and the bottom surface portion may face the lateral direction or the upper side in the same manner.

  Next, assembly of the flow rate adjusting device 10 will be described with reference to FIG. The flow rate adjusting device 10 is assembled by inserting the adjusting member 25 from the first opening 15 side of the device main body 11 from the outflow opening 30 side, and connecting the engaging portion 18 of the device main body 11 and the movable portion 32 of the adjusting member 25. Engage (see FIG. 4A). Thereafter, by rotating the adjustment member 25, the engaging portion 18 and the movable portion 32 are screwed together, and the assembly is completed by arranging the adjustment member 25 at a predetermined position of the instrument body 11 (see FIG. 4B). ). At this time, the variable portion 34 of the adjustment member 25 moves along the reduced diameter portion 20 of the small diameter passage 19 of the instrument main body 11.

  Next, how to adjust the flow rate of the flow rate adjusting device 10 of the embodiment will be described with reference to FIG. The flow rate adjustment by the flow rate adjusting device 10 according to the embodiment is performed by rotating the adjusting member 25 from the assembled state of FIG. 5A so that the movable portion 32 screwed with the engaging portion 18 of the device main body 11 is changed. It moves to the direction which protrudes from a 2nd opening part.

  When the changing portion 34 is projected, the changing portion 34 of the adjusting member 25 is pressed and changed by the second opening 16 in the direction in which the changing portion 34 is narrowed, and the diameter of the outflow opening 30 is reduced by this change ( FIG. 5B and FIG. 5C). And since the diameter of the outflow opening 30 is reduced, the adjustment can be performed so that the outflow rate is reduced. At this time, since the reduced diameter portion 20 is formed in the small diameter passage 19 on the second opening portion 16 side, the bottom surface portion 27 on the distal end side of the varying portion 34 moves along the reduced diameter portion 20. As a result, the moving part 34 can be moved smoothly.

At this time, the movement of the movable portion 32 moves in accordance with the pitch width of the thread and the thread groove formed on the movable portion 32 and the engaging portion 18 when the adjustment member 25 is rotated. It becomes possible to adjust the flow rate accurately (see FIG. 5B). In addition, the engagement portion 18 and the movable portion 32 are screwed together, so that it is easy to stop at an arbitrary position where the flow rate is adjusted. It becomes possible to suppress the movement.

  In addition, in the flow volume adjustment instrument 10 of embodiment, by arrange | positioning the adjustment member 25 to the uppermost part of the instrument main body 11, it will be in the state (D1) where the fluctuation | variation part 34 of the adjustment member 25 spreads most and the outflow opening part 30 spread most. The flow rate can be maximized (see FIG. 5A). On the other hand, when the adjustment member 25 is rotated to reach the deepest portion and the stepped portion 21 of the instrument body 11 and the regulating portion 36 of the adjustment member 25 are brought into contact with each other, the variation portion 34 is narrowed and the outflow opening 30 is narrowest. The state (D3) is reached, and the flow rate can be minimized (see FIG. 5C).

  Further, in order to adjust the desired flow rate, the adjustment member 25 is stopped in the middle of the engaging portion 18 of the instrument body 11 so that the desired flow rate flows out of the diameter of the outflow opening 30. The state (D2) in which the outflow opening 30 can obtain a desired flow rate can be achieved (see FIG. 5B). Therefore, adjustment of the flow rate of the flow rate adjusting device 10 of the embodiment can be performed in these ranges. The adjustment of the flow rate can be changed according to the size of the structure of the instrument main body 11 and the adjustment member 25. For example, by reducing the size of the diameter of the second opening, the size of the diameter of the outflow opening that protrudes from the second opening can be reduced, so that the flow rate can be reduced. it can.

  With such a configuration, according to the flow rate adjusting device of the embodiment, since a desired flow rate can be obtained with one flow rate adjusting device, it is necessary to prepare a plurality of devices for adjusting different flow rates. Furthermore, since the number of parts is small, the manufacturing cost can be suppressed.

  Next, the usage aspect of the flow volume adjustment instrument 10 of embodiment is demonstrated. The flow rate adjusting device 10 is installed and used, for example, in a pipe constituting a flash valve. The flash valve itself is known as shown in FIG. When the flow rate adjusting device 10 according to the embodiment is installed in the pipe, the flow rate is adjusted by rotating the adjusting member as described above. Therefore, when the flow rate adjusting device 10 is installed, one flow rate adjusting device is installed. The flow rate can be adjusted while rotating the adjusting member of the flow rate adjusting device.

  Then, when the flush valve lever is operated, water is supplied to the pipe, and when the water passes through the flow rate adjusting device 10, the adjusted flow rate flows out, thereby saving water. become able to. Therefore, since the flow rate can be adjusted with only one flow rate adjusting device, it is not necessary to prepare a plurality of devices, and the manufacturing cost can be reduced.

  In addition, since the flange part 22 is formed in the outer peripheral surface 14 of the instrument main body 11, since the flow volume adjustment instrument 10 can be hung around piping, when installed in piping, installation can be performed easily. It becomes like this. Further, by providing at least one annular elastic member 24 on the outer peripheral surface 14 of the instrument main body 11, liquid leakage when the flow rate adjusting instrument 10 is installed in the pipe can be suppressed. The number of elastic members is not limited to one, and a plurality of elastic members can be provided.

  Furthermore, the pipe for installing the flow rate adjusting member is not limited to the part shown in FIG. 6B, and can be installed at any place as long as the water saving effect can be obtained. Further, the flush valve may be a flush valve for a urinal as well as a toilet.

DESCRIPTION OF SYMBOLS 10: Flow volume adjustment instrument 11: Instrument main body 12: Upper surface 13: Bottom surface 14: Outer peripheral surface 15: 1st opening part 16: 2nd opening part 17: Communication path 18: Engagement part 19: Small diameter path 20: Reduction diameter part 21 : Step portion 22: Flange portion 23: Groove 24: Elastic member 25: Adjusting member 26: Upper surface portion 27: Bottom surface portion 28: Side surface portion 29: Inflow opening portion 30: Outflow opening portion 31: Flow passage 32: Movable portion 33: Fitting groove 34: variable portion 35: slit 36: restricting portion

Claims (7)

A flow rate adjusting instrument provided with a cylindrical instrument body installed in a pipe, and an adjustment member provided in the instrument body for adjusting the flow rate,
The instrument main body includes a first opening disposed on the upstream side of the pipe, a second opening having a smaller diameter than the first opening disposed on the downstream side, the first opening, and the second A communication path that communicates with the opening,
The adjusting member is formed of a cylindrical body having an outer diameter larger than at least the second opening, and is disposed on one side on the first opening side and on the other side on the second opening side. An outflow opening, and a flow passage through which the inflow opening and the outflow opening communicate with each other,
At least a part of the outer periphery of the adjustment member and at least a part of the inside of the communication passage of the instrument body are movable in the communication passage and can be stopped at a predetermined position in the communication passage. Is engaged,
The flow rate adjusting device according to claim 1, wherein the inner diameter of the outflow opening is changed by moving the adjusting member in the communication path. The adjustment member has a variation portion on the side of the outflow opening portion where the size of the flow passage is varied, and the size of the inner diameter of the outflow opening portion is varied according to the variation of the variation portion. The flow rate adjusting device according to claim 1 . The communication passage is provided with a small-diameter passage having a predetermined length that is smaller than the first opening and at least larger than the second opening from the second opening toward the first opening.
When the adjustment member is moved in the communication passage and the outflow opening is inserted into the small diameter passage, the variation portion is pressed and varied by at least a part of the small diameter passage. Item 3. The flow control device according to Item 2. A cylindrical movable portion having a predetermined length is formed between the inflow opening portion side of the adjustment member and the varying portion,
Between the first opening of the instrument body and the small diameter passage, a cylindrical engagement portion formed from the first opening toward the inside of the instrument body is formed.
The flow rate adjusting device according to claim 3, wherein an outer peripheral side of the movable portion and an inner peripheral side of the engaging portion are engaged.   The flow rate adjusting device according to claim 4, wherein the engagement between the engagement portion and the movable portion is screwing.   The flow rate adjusting device according to any one of claims 3 to 5, wherein the small diameter passage of the communication passage is reduced in diameter toward the second opening side. A flush valve having piping,
A flush valve, wherein the pipe is equipped with the flow control device according to any one of claims 1 to 6.

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