JP2013117263A - Flow control device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a flow control device that can smoothly rotate a valve element that controls a flow passage of a fluid without being obstructed by a foreign substance flowing in a fluid pipe.SOLUTION: The flow control device includes: a casing 2 mounted in a sealed state on a fluid pipe 1; and a flow control element 11 having a valve box 13 installed with tightly adhered to an inner surface of the casing 2 and having communication ports opening from an upstream side to a downstream side of the fluid pipe 1, and a valve element 14 rotatably and pivotally supported by axes 15b, 15c disposed in the valve box 13 and opening and closing the communication ports to control a flow passage of the fluid in the fluid pipe 1. The valve element 14 is composed of a blocking part 14b to block the communication port and bottom plates 14a, 14e, 14e interposed between the blocking part 14b and the axis 15b and rotating along an inner bottom surface 13g of the valve box 13. The bottom plates 14a, 14e, 14e are formed to cover substantially the whole area of the inner bottom surface 13g of the valve box 13.

Description

  The present invention relates to a housing that is hermetically attached to a fluid pipe, a valve box that is installed in close contact with the inner surface of the housing, and has a communication port that opens from the upstream side to the downstream side of the fluid pipe, and a valve The present invention relates to a flow control device including a fluid control device including a valve body that is pivotally supported with respect to a pivot provided in a box and includes a valve body that opens and closes a communication port to control a fluid flow path in a fluid pipe.

  A conventional current control device includes a sealed housing (housing) attached to a fluid pipe, a valve box installed in the sealed housing after the fluid pipe is cut in the sealed housing, and rotatable in the valve box. A switching valve body (valve body), and by opening and closing the communication port that opens upstream and downstream of the fluid pipe in the valve box by rotating the switching valve body in the valve box, (See, for example, Patent Document 1).

Japanese Patent No. 4144690 (page 3, Fig. 1)

  However, in the flow control device described in Patent Document 1, when the foreign matter flowing in the fluid pipe is accumulated in the housing, the foreign matter accumulated in the housing interferes with the rotation operation of the switching valve body. Thus, there is a problem that the smooth rotation of the switching valve body is hindered.

  The present invention has been made paying attention to such problems, and the operation of the valve body that controls the flow path of the fluid can be smoothly rotated without being obstructed by foreign substances flowing in the fluid pipe. It aims at providing a current control device.

In order to solve the above-mentioned problem,
A casing that is hermetically attached to the fluid pipe, a valve box that is installed in close contact with the inner surface of the casing, and that has a communication port that opens from the upstream side to the downstream side of the fluid pipe, and the valve box. A fluid control device having a valve body that is pivotally supported with respect to a provided pivot and that has a valve body that opens and closes the communication port to control a fluid flow path in a fluid pipe,
The valve body includes a closing portion that closes the communication port, and a bottom plate portion that is interposed between the closing portion and the pivot and rotates along an inner bottom surface of the valve box, and the bottom plate portion Is characterized by being formed so as to cover substantially the entire inner bottom surface of the valve box.
According to this feature, the bottom plate portion of the valve body is formed so as to cover substantially the entire inner bottom surface of the valve box, so that the pivot between the bottom plate portion and the inner bottom surface of the valve box and the pivot body is pivotally supported. Therefore, even if the valve body is rotated around the pivot axis without the entry of foreign matter, the rotational operation of the valve body is not hindered by the foreign matter and can be smoothly rotated.

The flow control device of the present invention is
The peripheral portion of the communication port in the valve box is formed in a protruding portion that is separated from the valve body in the valve box and protrudes toward the opening end of the fluid pipe or the housing. The front end portion of the opening portion is arranged close to the opening end portion so that the foreign matter flowing in the fluid pipe is not locked.
According to this feature, the opening end of the fluid pipe or the casing is close so that impurities flowing in the fluid pipe are not locked at a position separated from the valve body in the casing. Contaminants are less likely to accumulate between the protrusion and the projecting portion, and the flow path can be secured, and the movement of the valve element is not hindered by the accumulated contaminants and can move smoothly.

The flow control device of the present invention is
A space is formed below the peripheral edge of the communication port in the housing, and a discharge port capable of communicating with the outside of the housing is formed in the space.
According to this feature, contaminants locked between the open end of the fluid pipe and the protruding portion can be dropped into the gap, and accumulated contaminants can be excluded from the fluid flow path. By connecting the discharge port to the outside of the case, the foreign matter that has fallen into the gap is discharged out of the case, and no foreign matter is always deposited between the open end of the fluid pipe and the tip of the protruding part. Can be kept in a state.

The flow control device of the present invention is
The valve box is formed with a through-hole communicating with the gap.
According to this feature, even if foreign matter accumulates in the valve box, the foreign matter accumulated in the valve box is discharged from the outlet through the through-hole and the gap to the outside of the housing by opening the outlet. be able to.

The flow control device of the present invention is
The valve box is characterized in that a working port is formed through which a working tool for working in the fluid control can be inserted by communicating with the outside of the valve box.
According to this feature, it is possible to easily perform maintenance inspections and cleaning inside the housing from the outside of the housing by inserting a work tool from the work port, thus improving the maintainability of the flow control device. Can be made.

The flow control device of the present invention is
The control fluid is characterized in that a blocking portion for blocking the entry of the contaminants accumulated in the valve box into the pivot is formed.
According to this feature, since the valve body controls the fluid flow path by rotating with respect to the pivot within the valve box, the width dimension in the radial direction of the fluid pipe of the current control device is made compact. The blocking part prevents the foreign matter accumulated in the valve box from entering the pivot, thereby preventing the rotation of the valve body around the pivot caused by the foreign matter adhering to the pivot. can do.

FIG. 3 is a plan view showing a flow control device attached to a fluid pipe in the first embodiment. It is AA sectional drawing of FIG. It is BB sectional drawing of FIG. It is sectional drawing which shows the state which the valve body has obstruct | occluded the downstream of the fluid pipe | tube. It is sectional drawing which shows the state from which a foreign material is removed from the upper surface of a baseplate with a working tool. It is sectional drawing which shows the flow control apparatus in Example 2. FIG. It is sectional drawing which shows the flow control apparatus in Example 3. FIG.

  EMBODIMENT OF THE INVENTION The form for implementing the flow control apparatus which concerns on this invention is demonstrated below based on an Example.

  The flow control device according to the first embodiment will be described with reference to FIGS. 1 to 5. As shown in FIGS. 1 and 2, the fluid pipe 1 of the present embodiment is, for example, a cast iron fluid pipe 1 for sewers buried in the ground, extending in a substantially horizontal direction, The sewage in the pipe 1 contains impurities 21. For example, the fluid pipe 1 is provided with a housing 2 having a two-divided structure across the fluid pipe 1 and the branch pipe in order to switch the flow path of the fluid with a branch pipe which is a newly installed fluid pipe (not shown). Further, by using the fluid control 11 for controlling the flow of the fluid in the casing 2, the fluid flow path from the upstream side to the downstream side in the fluid pipe 1 is closed and the casing from the upstream side of the fluid pipe 1 is closed. The fluid flow path to the branch pipe connected to the branch portion 2a of the body 2 is opened, that is, the flow path is switched. In the flow control device according to the present invention, “controlling” the fluid flow includes blocking, switching, or adjusting the flow rate of the fluid.

  Furthermore, the fluid pipe according to the present invention may be made of ductile cast iron, steel, cast steel, vinyl chloride, polyethylene, polyolefin or the like, and in this embodiment, the fluid in the fluid pipe 1 is sewage, The fluid pipe 1 is not necessarily limited to sewage as long as it flows along with impurities, and may be, for example, clean water, industrial water, agricultural water, or the like.

  As shown in FIG. 1 and FIG. 2, the casing 2 attached to the outer peripheral surface 1 a of the fluid pipe 1 in a sealed manner is disposed from above with respect to the fluid pipe 1 and covers the upper side of the outer circumference of the fluid pipe 1. The first case 3 and the second case 4 which are arranged from below with respect to the fluid pipe 1 and cover the lower side of the outer periphery of the fluid pipe 1 are configured in a divided structure. The first case 3 and the second case 4 are made of a steel material such as mild steel. Note that the housing may have a divided structure including three or more cases. Furthermore, as long as the material of the housing is applied according to the material of the fluid pipe to which the housing is attached, various materials may be used similarly to the fluid pipe described above.

  As shown in FIG. 2, the first case 3 includes a pair of contact portions 3 a and 3 a that contact the outer peripheral surface 1 a in the upper part of the fluid pipe 1. An opening 3g that opens upward is formed at the upper part of the first case 3 so as to be substantially orthogonal to the tube axis of the fluid pipe 1. The opening 3g has an opening 3g. A circumferential surface 3h having a substantially circular shape (only a side sectional view is shown in this embodiment) is formed in a plan view facing inward.

  As shown in FIG. 1, at a substantially central portion in the tube axis direction of the fluid pipe 1 of the first case 3, a semi-cylindrical portion 3 e having a semicircular arc shape in a side sectional view is a horizontal direction that is the outer diameter direction of the fluid pipe 1 Projecting toward the direction. In addition, a pair of flanges 3 c and 3 c project from the both ends of the fluid pipe 1 of the first case 3 in the pipe axis direction so as to extend in the outer diameter direction of the fluid pipe 1 continuously from the contact portion 3 a. Furthermore, a fixing screw 3 b that can be screwed from the outside of the first case 3 toward the fluid pipe 1 is provided at the contact portion 3 a of the first case 3.

  As shown in FIGS. 2 and 3, the second case 4 has substantially the same width dimension in the tube axis direction of the fluid pipe 1 as the first case 3, and contacts the outer peripheral surface 1 a in the lower part of the fluid pipe 1. A pair of contact portions 4a, 4a in contact with each other is provided.

  In addition, a semi-cylindrical portion 4e having a semicircular arc shape in a side sectional view is formed in a substantially central portion in the tube axis direction of the fluid pipe 1 of the second case 4 so as to protrude toward the horizontal direction that is the outer diameter direction of the fluid pipe 1. Has been. Flat surfaces 4k that are inclined downward at both ends in the tube axis direction of the fluid tube 1 of the semi-cylindrical portion 4e in the second case 4 so as to facilitate insertion of the fluid control 11 into the housing 2. , 4m are formed to bulge from the upper end of the second case 4 to the lower part.

  Further, the inner wall facing the semi-cylindrical portion 4e in the second case 4 is inclined downward so that the fluid control 11 can be easily inserted into the housing 2 in the same manner as the flat surfaces 4k and 4m. The flat surface 4j is formed to bulge from the upper end portion of the second case 4 to the lower portion. These flat surfaces 4j, 4k, 4m are extended to the inner bottom of the second case 4 and intersect horizontally. These flat surfaces 4j, 4k, and 4m intersect at the inner bottom portion of the second case 4, so that the inner surface of the second case 4 has a trapezoidal mounting portion 4d whose upper surface is formed in a plane upward. Is formed.

  In addition, discharge ports 4 f and 4 f communicating with the outside of the second case 4 are formed in the inner bottom portion of the second case 4. Open / close valves 4g and 4g that can be opened and closed from the outside of the second case 4 are attached to the discharge ports 4f and 4f.

  Although not shown, three flat surfaces similar to the flat surfaces 4j, 4k, and 4m are also formed in the first case 3. The three flat surfaces in the first case 3 are formed by attaching the first case 3 and the second case 4 to the fluid pipe 1 to form the housing 2, so that each of the flat surfaces 4 j, 4 k, 4 m It constitutes a continuous surface.

  As shown in FIGS. 2 and 3, the second case 4 is formed with a pair of flanges 4c, 4c protruding from the contact portion 4a and facing the outer diameter direction of the fluid pipe 1. ing. Furthermore, a fixing screw 4 b that can be screwed from the outside of the second case 4 toward the fluid pipe 1 is provided between the flanges 4 c and 4 c in the second case 4.

  In order to configure the housing 2 by disposing the first case 3 and the second case 4 thus configured with respect to the fluid pipe 1, first, the first case 3 is disposed on the upper part of the fluid pipe 1. To do. The second case 4 is disposed from below with respect to the fluid pipe 1, and the flanges 4 c and 4 c formed on the second case 4 are arranged to face the flanges 3 c and 3 c formed on the first case 3. Moreover, both half cylinder parts 3e and 4e comprise the branch part 2a branched toward the side of the housing | casing 2 by arrange | positioning the flanges 3c and 3c and the flanges 4c and 4c facing each other.

  Next, the flanges 3c and 4c facing each other are temporarily fixed by tightening with bolts and nuts, and the case 2 is configured by welding between the first case 3 and the second case 4 to form a sealed shape. Let Furthermore, by fixing the fixing screws 3b and 4b provided in the first case 3 and the second case 4 toward the fluid pipe 1, the tips of the fixing screws 4b are attached to the outer peripheral surface 1a of the fluid pipe 1. The housing 2 is temporarily fixed to the fluid pipe 1 and the tube axis of the fluid pipe 1 and the axis of the housing 2 are aligned.

  As shown in FIGS. 1 and 2, an annular water stop member between the casing 2 and the outer peripheral surface 1 a of the fluid pipe 1 from both ends in the pipe axis direction of the fluid pipe 1 of the casing 2. 2b and 2b are pushed in, and a pair of push wheels 2c and 2c are attached to the fluid pipe 1 so as to sandwich the casing 2 from both ends of the casing 2 in the tube axis direction of the fluid pipe 1. By tightening these push wheels 2c, 2c to the flanges formed on both ends of the fluid pipe 1 of the casing 2 on the tube axis direction side with bolts and nuts, the water stop members 2b, 2b are attached by the push wheels 2c, 2c. Further, it is pushed between the housing 2 and the outer peripheral surface 1 a of the fluid pipe 1.

  Furthermore, the claw part provided in the inner peripheral part of the push wheels 2c, 2c is locked to the outer peripheral surface 1a of the fluid pipe 1, thereby fixing the casing 2 to the fluid pipe 1 and the casing 2 and the fluid. The space between the outer peripheral surface 1a of the pipe 1 is sealed with water-stopping members 2b and 2b, that is, the casing 2 is attached to the fluid pipe 1 in a sealed manner. Then, one end of the branch pipe is connected to the branch portion 2 a of the housing 2 attached to the upstream side of the fluid pipe 1. In addition, the nail | claw part demonstrated above does not need to be provided especially.

  As described above, the casing 2 attached to the fluid pipe 1 in a sealed manner is provided with a cutting device and a work valve (not shown) for cutting the fluid pipe 1 in the opening 3g in a sealed manner. As the substantially cylindrical cutter member (not shown) advances from the cutting device toward the fluid pipe 1, the fluid pipe 1 is cut in the housing 2. At this time, the fluid pipe 1 in the housing 2 is cut as an opening end in the present invention having a substantially arc shape in a plan view facing the pipe axis direction by cutting the fluid pipe 1 with a cutter member. Surfaces 1b and 1b are formed.

  After the cutting of the fluid pipe 1 by the cutter member, the cutting device retracts the cutter member and collects a section generated by cutting the fluid pipe 1 and removes it from the opening 3g. Then, the fluid control 11 is inserted into the casing 2 from the opening 3g instead of the cutting device, and is disposed between the cut surfaces 1b and 1b in the casing 2. At this time, the fluid control 11 is placed on a table-like placement portion 4d having a lower end projecting upward at the inner bottom portion of the second case 4 and an upper surface formed in a plane. For this reason, the gap 2d including the discharge ports 4f and 4f described above is formed below the fluid control 11 in the housing 2.

  As shown in FIGS. 2 and 3, the fluid control 11 is pivotally supported by a valve box 13 and pivots 15 b and 15 c that are provided at the upper and lower parts of the valve box 13 and have the same axis. The valve body 14 is mainly composed of. In the upper part of the valve box 13, an annular annular seal portion 16 a that can be in close contact with the entire circumference of the circumferential surface 3 h of the housing 2 is formed. Further, the valve box 13 has flat surfaces 4j, 4k, 4m and seal portions 16b, which are formed on the first case 3 and can be in close contact with each other over three flat surfaces that are continuous with the flat surfaces 4j, 4k, 4m, respectively. 16c and 16d are extended downward from the annular seal portion 16a, respectively.

  The seal portions 16b, 16c, and 16d intersect at the bottom of the valve box 13 in a horizontal manner. For this reason, the fluid control 11 of the present embodiment is inserted and arranged in the housing 2 so that the annular seal portion 16a is in close contact with the circumferential surface 3h and the seal portions 16b, 16c, and 16d are in the first case 3. In close contact with the three flat surfaces and flat surfaces 4j, 4k, and 4m formed in (1), the inside of the housing 2 is sealed.

  Inside the valve box 13, three communication ports V 1, V 2, V 3 are formed around pivots 15 b, 15 c provided above and below the valve box 13. These communication ports V1, V2, and V3 communicate with each other inside the valve box 13, and are separated from each other by seal portions 16b, 16c, and 16d outside the valve box 13.

  The communication port V1 communicates with the upstream side of the fluid pipe 1 of the valve box 13 between the seal part 16b and the seal part 16d, and the communication port V2 communicates between the seal part 16b and the seal part 16c. The communication port V3 communicates with the branch portion 2a side of the valve box 13 between the seal portion 16c and the seal portion 16d. The fluid flows through the fluid pipe 1 or the branch pipe through the communication ports V1, V2, and V3. In addition, the upper end part of the pivot 15c is connected to the pivot operation part 15a arrange | positioned above the valve box 13. FIG.

  Moreover, from the lower end part of the valve box 13 which comprises the peripheral part of communication port V1, V2, toward the cut surfaces 1b and 1b of the fluid pipe | tube 1 so that it may space apart from the valve body 14 arrange | positioned in the valve box 13. It forms in the protrusion parts 13a and 13a which protrude. Similarly, it forms in the protrusion part 13b which protrudes toward the branch part 2a so that it may space apart from the valve body 14 arrange | positioned in the valve box 13 from the lower end part of the valve box 13 which comprises the peripheral part of the communicating port V3. Has been. Among the protrusions 13a, 13a, 13b, the tip of the protrusions 13a, 13a is not locked between the protrusions 13a, 13a and the cut surfaces 1b, 1b of the fluid pipe 1 at the tip of the protrusions 13a, 13a. As described above, the fluid pipe 1 is disposed close to the cut surfaces 1b and 1b. Similarly, the tip of the projecting portion 13b is connected between the projecting portion 13b and the open end 2e formed near the valve box 13 of the branching portion 2a of the housing 2. In order not to be stopped, it is arranged close to the opening end 2e of the branch 2a.

  Furthermore, a working port 13c that penetrates the upper part of the valve box 13 in the vertical direction is formed in the upper part of the upper part of the valve box 13 in the vicinity of the communication port V2. An open / close valve 13d that can be opened and closed from the outside of the valve box 13 is attached to the working port 13c. As shown in FIG. 5, by opening this on-off valve 13d, an operator inserts a work tool 22 such as a cleaning tool or a camera into the housing 2 to perform maintenance work of the fluid control 11 or the like. Is possible.

  In the lower part of the valve box 13, a recess 13e in which the lower part of the valve body 14 is arranged is formed to open upward. The upper surface of the recess 13e constitutes an inner bottom surface 13g in the valve box 13. As shown in FIGS. 2 and 3, the valve body 14 includes a bottom plate 14 a that is substantially fan-shaped in plan view and is disposed in a recess 13 e formed in the lower portion of the valve box 13. The bottom plate 14a is pivotally supported by a pivot 15b provided in the valve box 13 at a location corresponding to the vicinity of the apex of the fan shape. A closing member 14b formed in a shape capable of selectively closing the communication port V1, V2 or V3 is placed on the peripheral edge of the bottom plate 14a.

  Two extending bottom plates 14e are disposed in the recess 13e so as to be continuous with the bottom plate 14a. These extended bottom plates 14e and 14e are formed in a substantially fan shape having a larger central angle than the bottom plate 14a in a plan view and complementing the bottom plate 14a to be a substantially circular shape, and at the ends on one side in the circumferential direction. It is connected via the connection member 14c. Further, the extended bottom plates 14e and 14e are connected at the other end to different ends in the circumferential direction of the bottom plate 14a via connecting members 14c and 14c, respectively. Therefore, the bottom plate 14a and the extended bottom plates 14e and 14e constitute a bottom plate portion in the present invention that covers substantially the entire inner bottom surface 13g of the valve box 13 from above in a plan view.

  More specifically, a pivot 15b is provided at the center position of the inner bottom surface 13g of the substantially circular valve box 13, and the bottom plate 14a and the extended bottom plates 14e and 14e constituting the bottom plate portion of the present invention are substantially the same as the inner bottom surface 13g. Since it has a substantially circular shape with a diameter and is pivotally supported with respect to the pivot shaft 15b at the center position, it covers the substantially entire surface of the inner bottom surface 13g regardless of the rotational position.

  On the other hand, the lower end portion of the pivot 15c is connected to the closing member 14b by a connection member (not shown). For this reason, the closing member 14b and the bottom plate 14a can be rotated around the pivots 15b and 15c by operating the pivot operating portion 15a connected to the pivot 15c.

  The flow path of the fluid flowing from the upstream side to the downstream side of the fluid pipe 1 by the valve body 14 in the housing 2 attached over the fluid pipe 1 and the branch pipe in this way is arranged upstream of the fluid pipe 1. 3 and 4, the switching member 14b is disposed at the communication port V3 and closes the communication port V3 (see FIG. 3), as shown in FIGS. The operation unit 15a is operated. By operating the pivot operating portion 15a, the closing member 14b and the bottom plate 14a are rotated around the pivots 15b and 15c in the valve box 13, and the closing member 14b is disposed at the communicating port V2, thereby closing the communicating port V2. Then, the communication port V3 is opened (see FIG. 4).

  As shown in FIG. 4, the communication port V <b> 2 is closed by the closing member 14 b as described above, so that the fluid flowing from the upstream side of the fluid pipe 1 is connected to the communication port V <b> 1 in the valve box 13 in the housing 2. And flows into the valve box 13 to collide with the closing member 14b blocking the communication port V2 so as to flow downstream in the tube axis direction of the fluid pipe 1. Due to the collision with the closing member 14b, the fluid changes the flow direction toward the communication port V3 and flows from the branch portion 2a toward the branch pipe.

  More specifically, when the fluid collides with the closing member 14b closing the communication port V2, the contaminants 21 flowing in the fluid pipe 1 together with the fluid easily accumulate on the bottom plate 14a at the communication port V2. As shown in FIG. 5, the contaminants 21 accumulated on the bottom plate 14a are removed by the operator using a cleaning tool 22 inserted from the on-off valve 13d and the work port 13c, or a work tool such as a camera (not shown). Is possible. For this reason, the valve body 14 of the present embodiment is prevented from being prevented from rotating around the pivots 15b and 15c due to the interference of the contaminants 21 deposited on the bottom plate 14a.

  In order to switch the flow of the fluid from the upstream side of the fluid pipe 1 toward the branch pipe again from the upstream side of the fluid pipe 1 to the downstream side, the closing member 14b is disposed in the communication port V2, and From the state where the communication port V2 is closed, the pivot operation unit 15a is operated again. By operating the pivot operating portion 15a, the closing member 14b and the bottom plate 14a are rotated around the pivots 15b and 15c in the valve box 13, and the closing member 14b is disposed at the communicating port V3 to close the communicating port V3. Open the communication port V2.

  Thus, since the inner bottom surface 13g of the valve box 13 is covered from above by the bottom plate 14a and the extended bottom plates 14e, 14e, the contaminants 21 are placed on the inner bottom surface 13g by the bottom plate 14a and the extended bottom plates 14e, 14e. Is prevented from being accumulated, and the closing member 14b can be smoothly rotated between the communication port V2 and the communication port V3.

  As shown in FIG. 2, some of the contaminants that flow with the fluid from the upstream side of the fluid pipe 1 to the downstream side or from the upstream side of the fluid pipe 1 toward the branch pipe are part of the cut surface 1 b of the fluid pipe 1. , 1b and the tip of the projecting portions 13a, 13a may fall and accumulate in the gap 2d formed below the fluid control 11. The impurities 21 accumulated in the gap 2d can be discharged out of the housing 2 together with the fluid via the discharge ports 4f and 4f by opening the opening and closing valves 4g and 4g.

  At this time, even if the foreign matter 21 may fall into the gap 2d as described above because the distal ends of the protrusions 13a and 13a are disposed close to the cut surfaces 1b and 1b of the fluid pipe 1, The contaminants 21 are relatively small particles and the like, and the amount of the impurities 21 is very small. There is no risk of accumulating a large amount in the gap 2d, and the flow path is formed so that the protrusions 13a and 13a are formed. The flow velocity of the fluid from the fluid pipe 1 toward the discharge ports 4f and 4f is accelerated between the front end of the fluid pipe 1 and the cut surfaces 1b and 1b of the fluid pipe 1, and the protrusions 13a and 13a and the cut surface 1b of the fluid pipe 1 are It is possible to powerfully discharge the foreign matter 21 accumulated in the peripheral portion of 1b to the outside of the housing 2 through the discharge ports 4f and 4f.

  As described above, in the flow restricting device according to the present embodiment, the valve body 14 includes the closing member 14b that closes the communication ports V1, V2, and V3, and the inner bottom surface of the valve box 13 that is interposed between the closing member 14b and the pivot 15b. The bottom plate 14a and the extended bottom plates 14e, 14e that rotate along 13g are formed so that the bottom plate 14a and the extended bottom plates 14e, 14e cover substantially the entire inner bottom surface 13g of the valve box 13. Since the bottom plate 14a of the valve body 14 and the extended bottom plates 14e, 14e are formed so as to cover substantially the entire inner bottom surface 13g of the valve box 13, the bottom plate 14a and the extended bottom plates 14e, 14e Even if the valve body 14 is rotated around the pivot shafts 15b and 15c without the foreign material 21 entering between the inner bottom surface 13g of the valve box 13 and the pivot shafts 15b and 15c that pivotally support the valve body 14, the contaminants 21 to turn the valve body 14 Unimpeded, it can be smoothly rotated.

  Further, the peripheral portions of the communication ports V1, V2, and V3 in the valve box 13 are separated from the valve body 14 in the valve box 13 and protruded toward the cut surfaces 1b and 1b of the fluid pipe 1. The protrusions 13a, 13a and 13b are formed at the tip end portions of the cut surfaces 1b and 1b and the housing 2 so that the contaminants 21 flowing in the fluid pipe 1 or the branch pipe are not locked. Since the cut surfaces 1b and 1b of the fluid pipe 1, the open end 2e of the casing 2 and the protrusions 13a, 13a and 13b are separated from the valve body 14 in the casing 2, the fluid pipe Since the contaminants 21 flowing in 1 are close to each other so as not to be locked, the contaminants 21 are accumulated between the cut surfaces 1b and 1b, the opening end 2e of the housing 2 and the protruding portions 13a, 13a and 13b. It becomes difficult to secure the flow path, and the accumulated soot Movement of the valve element 14 is not hindered by the object 21 can be smoothly moved.

  Further, a gap 2d is formed below the peripheral edge of the communication ports V1 and V2 in the casing 2, and discharge openings 4f and 4f that can communicate with the outside of the casing 2 are formed in the gap 2d. Therefore, the contaminants 21 locked between the cut surfaces 1b and 1b of the fluid pipe 1 and the protrusions 13a and 13a are dropped into the gap 2d, and the accumulated contaminants 21 are placed on the fluid flow path. In addition, the discharge ports 4f and 4f are communicated with the outside of the casing 2 to discharge the contaminants 21 that have fallen into the gap 2d to the outside of the casing 2, and the cut surface 1b of the fluid pipe 1 is discharged. , 1b and the tip of the projecting portions 13a, 13a can always be kept in a state where no contaminants 21 are deposited.

  Further, as shown in FIG. 5, the valve box 13 communicates with the outside of the valve box 13 so that a work tool such as a cleaning tool 22 or a camera that performs work in the fluid control 11 can be inserted. Since the opening 13c is formed, it is possible to easily perform work such as maintenance inspection and cleaning in the housing 2 from the outside of the housing 2 by inserting a work tool from the working port 13c. The maintainability of the flow device can be improved.

  Next, a flow control device according to the second embodiment will be described with reference to FIG. The description of the same configuration as that of the above embodiment is omitted.

  As shown in FIG. 6, a through-hole 13 f facing in the vertical direction is formed in the recess 13 e in the valve box 13 of the present embodiment. The through-hole 13f communicates with the inside of the recess 13e of the valve box 13 and the gap portion 2d when the fluid control 11 is inserted and arranged in the housing 2.

  For this reason, even if the fine impurities 21 flowing in the fluid pipe 1 enter the recess 13e from between the bottom plate 14a and the valve box 13, the impurities 21 that have entered the recess 13e are relatively minute. It is a granule and the like, and it is a very small amount, so that it does not have a possibility of being deposited in a large amount in the recess 13e, and falls into the gap 2d through this through-hole 13f. Further, by opening the on-off valves 4g and 4g, the contaminants 21 that have entered the recess 13e can be discharged to the outside of the housing 2 together with the fluid via the discharge ports 4f and 4f. It is possible to prevent the rotation of the valve body 14 in the valve box 13 from being hindered by the entry of the contaminants 21 between 14a and 14a.

  As described above, in the flow restricting device in the present embodiment, the valve box 13 is formed with the through-hole 13f communicating with the gap 2d, so that even if the contaminants 21 are accumulated in the valve box 13, By opening the discharge ports 4f and 4f, the contaminants 21 accumulated in the valve box 13 can be discharged out of the housing 2 from the discharge ports 4f and 4f through the through-hole 13f and the gap 2d.

  Next, a flow control device according to a third embodiment will be described with reference to FIG. The description of the same configuration as that of the above embodiment is omitted.

  As shown in FIG. 7, a plurality of blocking plates 14d as blocking portions in the present invention, which are made of rubber plates or the like, are attached to the bottom of the bottom plate 14a of the present embodiment. These blocking plates 14d are annularly attached to the lower portion of the bottom plate 14a along the circumferential direction of the bottom plate 14a, and the lower end portion is always in sliding contact with the bottom surface of the recess 13e.

  For this reason, when the pivot operating portion 15a is operated, the bottom plate 14a and the closing member 14b are rotated in the valve box 13, so that the contaminants 21 accumulated in the valve box 13 are separated from the bottom plate 14a and the valve box 13. Even if it enters the recess 13e from between, the contaminants 21 that have entered the recess 13e are relatively small particles and the like, and there is no risk of accumulating a large amount in the recess 13e. Since the lower end portions of these blocking plates 14d swing in the recesses 13e, the entry of impurities 21 into the pivot 15b is prevented.

  As described above, in the current control device according to the present embodiment, the control fluid 11 is formed with the shielding plate 14d that blocks the entry of the contaminants 21 accumulated in the valve box 13 into the pivot 15b. Since the valve body 14 controls the flow path of the fluid by rotating with respect to the pivot 15b in the valve box 13, the width dimension in the radial direction of the fluid pipe 1 of the current control device may be made compact. By blocking the entry of the contaminants 21 accumulated in the valve box 13 to the pivot 15b by the blocking plate 14d, the rotation of the valve body 14 around the pivot 15b due to the contaminants 21 adhering to the pivot 15b. Can be prevented from being hindered.

  Although the embodiments of the present invention have been described with reference to the drawings, the specific configuration is not limited to these embodiments, and modifications and additions within the scope of the present invention are included in the present invention. It is.

  For example, in the above-described embodiment, the casing 2 is attached over the fluid pipe 1 and the branch pipe, and the valve body 14 is operated in the casing 2 so that the fluid flows from the upstream side to the downstream side of the fluid pipe 1. However, the casing 2 may be attached only to the fluid pipe 1 without providing the branching portion 2a in the casing 2 instead of the flow from the upstream side of the fluid pipe 1 to the branch pipe. In this case, the closing member 14b is rotated between the communication port V2 and a portion corresponding to the communication port V3 by operating the pivot operating portion 15a, and flows from the upstream side to the downstream side of the fluid pipe 1. The opening / closing of the fluid flow may be switched.

  Moreover, in the said Example, the flow of the fluid from the upstream of the fluid pipe | tube 1 to the downstream by rotating the closing member 14b between the communicating port V2 and the communicating port V3 in the valve box 13 in the valve box 13 is carried out. Is switched from the upstream side of the fluid pipe 1 to the branch pipe, but the fluid flow from the upstream side of the fluid pipe 1 to the downstream side can be switched from the upstream side of the fluid pipe 1 to the branch pipe. If so, for example, a valve body having a different shape such as a butterfly valve may be used.

  Further, in the above embodiment, the bottom plate portion is configured by the substantially fan-shaped bottom plate 14a and the two extended bottom plates 14e and 14e in plan view, but by forming one bottom plate in a circular shape in plan view, You may make it comprise the baseplate part of this invention only with the said one baseplate.

1 Fluid pipe 1b Cut surface (open end)
2 Housing 2d Gap 2e Open end 4f Discharge port 11 Fluid control 13 Valve box 13a, 13b Protrusion 13c Work port 13g Inner bottom surface 14 Valve element 14a Bottom plate (bottom plate portion)
14b Occlusion member (occlusion part)
14d Blocking plate (blocking part)
14e Extended bottom plate (bottom plate)
15b, 15c Axis 21 Contamination 22 Cleaning tool (work tool)
V1, V2, V3 communication port

Claims (6)

A casing that is hermetically attached to the fluid pipe, a valve box that is installed in close contact with the inner surface of the casing, and that has a communication port that opens from the upstream side to the downstream side of the fluid pipe, and the valve box. A fluid control device having a valve body that is pivotally supported with respect to a provided pivot and that has a valve body that opens and closes the communication port to control a fluid flow path in a fluid pipe,
The valve body includes a closing portion that closes the communication port, and a bottom plate portion that is interposed between the closing portion and the pivot and rotates along an inner bottom surface of the valve box, and the bottom plate portion Is formed by covering substantially the entire inner bottom surface of the valve box.   The peripheral portion of the communication port in the valve box is formed in a protruding portion that is separated from the valve body in the valve box and protrudes toward the opening end of the fluid pipe or the housing. 2. The flow control device according to claim 1, wherein a tip end portion of the first end portion is disposed close to the opening end portion so that foreign matters flowing in the fluid pipe are not locked.   A void portion is formed below a peripheral edge portion of the communication port in the housing, and a discharge port capable of communicating with the outside of the housing is formed in the void portion. Item 3. The current control device according to item 1 or 2.   The flow control device according to claim 3, wherein a through-hole communicating with the gap is formed in the valve box.   5. The working port into which a working tool for working in the fluid control can be inserted is formed in the valve box by communicating with the outside of the valve box. The current control device according to the above.   6. The flow restricting device according to claim 1, wherein a blocking portion that blocks the entry of the foreign matter accumulated in the valve box into the pivot shaft is formed in the control fluid. apparatus.

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