JP5094753B2 - valve - Google Patents

Description

  The present invention relates to a valve including a valve box having a receiving port.

  Conventionally, as shown in FIG. 10, as the valve box 60 of the valve 59, for example, a cylindrical body portion 62 having a flow path 61 through which a fluid flows, and a valve body housing portion 64 that houses a valve body 63. Is formed so as to intersect the inverted T shape. A fluid inlet / outlet port 65 and a connecting flange 66 are provided at both ends of the body portion 62. In addition, ribs 67 are provided at corner portions where the outer peripheral surface of the body portion 62 and the outer surface of the valve body housing portion 64 intersect. The rib 67 is a plate-like member that is provided on the outer peripheral surface of the body portion 62 from the valve body housing portion 64 to the flange 66 and extends along the axis 69 direction of the valve rod 68.

  The valve box 60 provided with the rib 67 as described above is described in, for example, Patent Document 1 below.

JP2000-240822A

  In the above conventional model, when a pipe is connected to the fluid inlet / outlet 65 of the valve box 60, the weight of the valve 59 is significantly heavier than that of the pipe, and therefore the pipe line tends to bend downward from the valve 59, As a result, stress concentrates on the rib 67. In order to withstand such stress concentration, there is a problem that the thickness T of the entire rib 67 needs to be increased.

  Moreover, when casting the valve box 60, a casting_mold | template is arrange | positioned to the reverse T shape which turned the valve body accommodating part 64 upwards, and a molten metal is cast. When the molten metal surface reaches from the body portion 62 to the valve body housing portion 64, the wall thickness suddenly decreases at the fillet portion where the body portion 62 and the rib 67 are connected. The number of ribs 67 increases rapidly. Thereby, the inflow resistance to the rib 67 of a molten metal increases, and there exists a problem that the molten metal flow property when a molten metal flows into the rib 67 from the trunk | drum 62 deteriorates.

  Further, in the case where casting is performed with the valve body accommodating portion 64 lying sideways and the axial center of the body portion 62 and the axial center of the valve body accommodating portion 64 being horizontal, the molten metal surface is in the width (thickness) direction of the rib 67. Since the area of the hot water surface changes abruptly when passing, the hot water flowability may be impaired.

  It is an object of the present invention to provide a valve that can sufficiently disperse the stress of the rib of the valve box, and that improves the flowability of molten metal when the molten metal flows into the rib from the trunk when casting the valve box. Objective.

In order to achieve the above object, the first invention has a receiving port in the fluid inlet / outlet part,
Insert the insertion port formed in the pipe of the connection partner into the receiving port,
A valve having a valve box formed by crossing a cylindrical body portion having a flow path through which a fluid flows and a valve body housing portion for housing a valve body in an inverted T shape,
Fluid inlets and outlets are formed at both ends of the trunk,
Ribs are provided at the corners where the outer peripheral surface of the body part and the outer surface of the valve body storage part intersect,
The rib has a first rib body and a second rib body,
The first rib body extends from the axial direction of the valve stem along the axial direction of the trunk,
The second rib body is provided on both sides of the first rib body on the outer peripheral surface of the body portion, and extends along the axial direction of the body portion.
The width of the second rib body in the circumferential direction of the body portion is wider than the width of the first rib body.

  According to this, the rib is provided on both sides of the first rib body on the outer peripheral surface of the first rib body extending from the axial direction of the valve stem along the axial direction of the trunk section and on the outer periphery of the trunk section. A second rib body extending along the axial direction, and the second rib body is wider than the first rib body. Distributed. In addition, when the valve box is cast, the amount of variation in thickness from the body portion to the rib is reduced, so that the flowability of molten metal when the molten metal flows from the body portion to the rib is improved.

Further, in the valve according to the second aspect of the present invention, first and second step portions that protrude radially outward from the outer peripheral surface of the trunk portion are formed at the receiving port,
The second step is disposed on the back side of the first step,
The radial height from the outer peripheral surface of the trunk portion to the outer peripheral surface of the first step portion is formed higher than the radial height from the outer peripheral surface of the trunk portion to the outer peripheral surface of the second step portion,
The first rib body is provided connected to the first step portion from the valve body housing portion,
The second rib body is connected to the second step portion from the valve body housing portion and is provided on the outer peripheral surface of the trunk portion.

According to this, when casting a valve box, the hot water flow property when molten metal flows into the rib from the first and second step portions of the body portion is improved.
In the valve according to the third aspect of the present invention, the height in the radial direction from the outer peripheral surface of the body portion to the end portion of the first rib body at the end portion where the first rib body is connected to the first stepped portion is the body. The height in the radial direction from the outer peripheral surface of the portion to the outer peripheral surface of the first stepped portion is equal to or less than that.

According to this, since the variation (difference) between the height of the end portion of the first rib body and the height of the first step portion is small, the stress concentration in the axial direction of the trunk portion is alleviated.
Further, in the valve according to the fourth aspect of the invention, the height in the radial direction from the outer peripheral surface of the trunk portion to the end portion of the second rib body at the end where the second rib body is connected to the second stepped portion is the trunk. The height from the outer peripheral surface of the portion to the outer peripheral surface of the second step portion is substantially the same as the height in the radial direction.

According to this, since the variation (difference) between the height of the end portion of the second rib body and the height of the second step portion is small, the stress concentration in the axial direction of the trunk portion is alleviated.
Further, in the valve according to the fifth invention, a lock ring storage groove is formed on the inner surface of the receiving port,
The lock ring fitted in the lock ring storage groove is configured such that the insertion projection on the outer surface of the insertion port is engaged from the back of the receiving port,
On the back side of the lock ring storage groove, an insertion projection storage portion for storing the inserted insertion projection is formed,
The first step portion is a step portion having a lock ring storage groove inside,
A 2nd step part is a step part which has an insertion opening protrusion accommodating part inside.

According to this, it is possible to reduce the stress generated in the ribs and improve the flowability of the hot water even for the earthquake resistant valve.
Further, in the valve according to the sixth aspect of the present invention, one or more other rib bodies are provided between the first rib body and the second rib body,
The width of another rib body in the circumferential direction of the body portion is wider than the width of the first rib body, narrower than the width of the second rib body, and narrower toward the upper stage.

  According to this, since the first and second rib bodies and another rib body form three or more rib bodies, it is possible to further reduce the stress generated in the ribs and improve the hot water flowability.

  As described above, according to the present invention, since the second rib body is wider than the first rib body, the stress generated in the rib is sufficiently dispersed by the second rib body. In addition, when the valve box is cast, the amount of variation in thickness from the body portion to the rib is suppressed, so that the flowability of molten metal when the molten metal flows from the body portion to the rib is improved.

It is a figure of the gate valve in the 1st Embodiment of this invention. It is a perspective view of the valve box of a gate valve. It is the side view which displayed a part of valve box of the gate valve by the longitudinal cross section similarly. It is the top view which displayed a part of valve box of the gate valve in the cross section similarly. It is an expanded sectional view of the edge part of the 1st and 2nd rib body of the valve box of a gate valve, and the 1st and 2nd step part. It is a partially cutaway front view of the valve box of the gate valve. It is the side view which displayed a part of valve box of the gate valve in the 2nd Embodiment of this invention with the longitudinal cross-section. It is a partially notched front view of the valve box of the gate valve in the 3rd Embodiment of this invention. It is a partially notched front view of the valve box of the gate valve in the 4th Embodiment of this invention. It is a figure of the conventional gate valve, (a) is a side view, (b) shows the XX arrow figure in (a).

Hereinafter, a first embodiment of the present invention will be described with reference to the drawings.
As shown in FIG. 1, reference numeral 10 denotes an earthquake-resistant gate valve (an example of a valve) having a cast valve box 11. As shown in FIGS. 2 to 4, the valve box 11 includes a cylindrical body 13 having a flow path 12 through which a fluid flows, and a square box-shaped valve body housing part 15 that houses the valve body 14. It is formed to intersect the inverted T shape.

  A rotatable valve rod 16 that moves the valve body 14 to open and close the flow path 12 is inserted into the valve body housing portion 15. Further, the valve body accommodating portion 15 has an opening 38 and a flange portion 39 at one end in the direction of the axis 17 of the valve stem 16.

  Receiving ports 19 having fluid ports 18 are formed at both ends of the body portion 13. In addition, an insertion port 22 is provided at the distal end of the pipe 21 that is a connection partner, and the valve box 11 and the pipe 21 are connected by inserting the insertion port 22 into the receiving port 19.

  On the inner peripheral surface of the receiving port 19, a lock ring storage groove 24, an insertion port storage unit 25, and a tapered surface 26 are formed. A ring-shaped centering rubber 27 and a lock ring 28 are fitted in the lock ring storage groove 24. The insertion port protrusion storage portion 25 is located on the back side of the receiving port 19 with respect to the lock ring storage groove 24. The taper surface 26 is located closer to the fluid inlet / outlet 18 than the lock ring storage groove 24, and has a diameter increasing toward the fluid inlet / outlet 18.

On the outer peripheral surface of the distal end portion of the insertion opening 22, an insertion protrusion 30 that protrudes radially outward is formed. The insertion protrusion 30 inserted into the receiving opening 19 is stored in the insertion protrusion storage section 25.
The receiving port 19 has a flange 31 on the outer periphery of the fluid inlet / outlet port 18. A rubber ring 32 is inserted between the outer peripheral surface of the inserted insertion port 22 and the inner peripheral surface of the receiving port 19. The rubber ring 32 is disposed closer to the fluid inlet / outlet 18 than the lock ring 28, and is pressed toward the inner side of the receiving port 19 by the pusher wheel 33. The pusher wheel 33 is connected to the flange 31 by a plurality of bolts and nuts 34, and the insertion opening 22 is inserted through the pusher wheel 33.

  The receiving port 19 is formed with first and second step portions 36 and 37 that protrude radially outward from the outer peripheral surface 13 a of the body portion 13. The first step portion 36 has a lock ring storage groove 24 inside. In addition, the second step portion 37 has an insertion protrusion storage portion 25 inside, and is disposed on the back side of the first step portion 36. As shown in FIG. 5, the radial height H <b> 1 from the outer peripheral surface 13 a of the body portion 13 to the outer peripheral surface of the first step portion 36 is the outer peripheral surface of the second step portion 37 from the outer peripheral surface 13 a of the body portion 13. It is formed higher than the height H2 in the radial direction.

In addition, the joint structure which consists of the said receiving port 19 and the insertion port 22 is based on NS type | mold joint (Japan Water Works Association standard JWWA G113 * 114) which is an example of a seismic joint.
As shown in FIG. 2, ribs 40 are provided at corner portions where the outer peripheral surface 13 a of the body portion 13 and the outer surface facing the flow path 12 direction (flow direction) of the valve body housing portion 15 intersect. The rib 40 has a first rib body 41 and a second rib body 42. The first rib body 41 extends from the direction of the axis 17 of the valve stem 16 along the direction of the axis 23 of the body portion 13. Further, the second rib body 42 is provided on both sides of the first rib body 41 on the outer peripheral surface 13 a of the body portion 13, and extends along the direction of the axis 23 of the body portion 13.

  The first rib body 41 is formed from the outer surface of the valve body housing portion 15 to the first step portion 36 in the direction of the axis 23 of the body portion 13, and in the direction of the axis 17 of the valve stem 16. The flange portion 39 and the body portion 13 are connected to each other.

  The second rib body 42 is formed on the outer peripheral surface 13 a of the body portion 13, and is connected to the second step portion 37 from the outer surface of the valve body housing portion 15 in the direction of the axis 23 of the body portion 13. . As shown in FIG. 6, the width W2 of the second rib body 42 in the circumferential direction of the body portion 13 is formed wider than the width W1 of the first rib body 41.

  As shown in FIG. 5, the first rib body 41 has an end portion 41 a connected to the first stepped portion 36, and the end portion of the first rib body 41 from the outer peripheral surface 13 a of the body portion 13. The radial height H3 up to 41a is formed slightly lower than the height H1 from the outer peripheral surface 13a to the first stepped portion 36. Note that a rounded portion 44 having a predetermined radius is formed at the other end 41 b of the first rib body 41.

  Further, the second rib body 42 has an end portion 42 a connected to the second stepped portion 37, and the radial height from the outer peripheral surface 13 a of the body portion 13 to the end portion 42 a of the second rib body 42 is high. The height H4 is formed at the same height as the height H2 from the outer peripheral surface 13a to the second stepped portion 37.

Further, as shown in FIG. 2, a lateral rib member 45 is provided on the outer peripheral surface of the valve body housing portion 15.
Hereinafter, the operation of the above configuration will be described.

  As shown in FIG. 1, a centering rubber 27 and a lock ring 28 are fitted into the lock ring housing groove 24, and an insertion port 22 of a pipe 21 is inserted into a receiving port 19 of the valve box 11, so that a rubber ring 32 and a press ring are inserted. The gate valve 10 is connected to the pipe 21 by attaching the bolt 33 and the bolt / nut 34. For example, when an earthquake occurs, the insertion port protrusion 30 engages with the lock ring 28 from the back side of the receiving port 19 in the removal direction A, so that the insertion port 22 can be prevented from coming out of the receiving port 19.

  As shown in FIGS. 2 and 6, the rib 40 includes a first rib body 41 extending from the direction of the axis 17 of the valve stem 16 along the direction of the axis 23 of the body 13 and the outer peripheral surface 13 a of the body 13. The second rib body 42 is provided on both sides of the first rib body 41 and extends along the direction of the axis 23 of the body portion 13. The width W2 of the second rib body 42 is the first rib body 42. Since the rib body 41 is wider than the width W <b> 1, the stress generated in the rib 40 is sufficiently dispersed by the second rib body 42.

  Further, when casting the valve box 11, the mold is placed in an inverted T shape with the valve body housing portion 15 facing upward, and the molten metal is cast. At this time, since the second rib body 42 is formed in the fillet portion where the first rib body 41 and the body portion 13 are connected, the thickness variation from the body portion 13 to the first rib body 41 is changed. The amount is reduced, thereby improving the flowability of the molten metal when the molten metal flows from the body portion 13 into the first rib body 41.

  Further, as shown in FIG. 5, since the end portion 41 a of the first rib body 41 is integrally connected to the first step portion 36, the lock ring storage groove 24 located inside the first step portion 36. Can be prevented from being deformed. Moreover, the molten metal flow property when the molten metal flows into the first rib body 41 from the first step portion 36 is improved during casting.

Further, since there is little variation (difference) between the height H3 of the end portion 41a of the first rib body 41 and the height H1 of the first stepped portion 36, stress concentration in the axial direction of the body portion 13 is alleviated. The
In addition, since the end portion 42 a of the second rib body 42 is integrally connected to the second step portion 37, the insertion port protrusion accommodating portion 25 located inside the second step portion 37 is deformed. Can be prevented. Moreover, the molten metal flow property when the molten metal flows into the second rib body 42 from the second step portion 37 is improved during casting.

Further, since there is little variation (difference) between the height H4 of the end portion 42a of the second rib body 42 and the height H2 of the second stepped portion 37, stress concentration in the axial direction of the body portion 13 is alleviated. The
Further, as a second embodiment, as shown in FIG. 7, an arcuate round portion 47 may be formed at a fillet portion where the valve body accommodating portion 15 and the second rib body 42 intersect.

According to this, the stress of the fillet portion can be reduced.
As a third embodiment, as shown in FIG. 8, the second rib body 42 is gently inclined so that the thickness gradually decreases toward the end in the circumferential direction of the body portion 13. .

According to this, the thickness variation in the circumferential direction of the trunk portion 13 is reduced, and the hot water flow is further improved.
In the first embodiment, as shown in FIG. 6, the rib 40 composed of the first and second rib bodies 41 and 42 is provided in the valve box 11, but as a fourth embodiment, FIG. As shown in FIG. 3, the valve box 11 may be provided with a rib 40 composed of first to third rib bodies 41, 42, 50. In this case, the third rib body 50 is an example of another rib body, and is formed between the first rib body 41 and the second rib body 42. The width W3 of the third rib body 50 in the circumferential direction of the body portion 13 is formed wider than the width W1 of the first rib body 41 and narrower than the width W2 of the second rib body 42.

According to this, the stress which generate | occur | produces in the rib 40 is further reduced, and the hot water flow property when molten metal flows into the rib 40 from the trunk | drum 13 further improves.
In the fourth embodiment, the third rib body 50 is formed as an example of another rib body. However, a single or a plurality of other rib bodies may be formed as described above. Also good. In the case of forming a plurality of other rib bodies, the width of the upper rib body (another rib body on the side close to the first rib body 41) is the lower rib body (close to the second rib body 42). It is formed narrower than the width of another rib body on the side.

  In each of the above embodiments, the valve box 11 is cast by placing a mold in an inverted T shape with the valve body housing portion 15 facing upward, but as another embodiment, the valve body housing portion 15 is laid sideways, You may cast in the attitude | position which made the axial center 23 of the trunk | drum 13 and the axial center of the valve body accommodating part 15 (namely, axial center 17 of the valve stem 16) horizontal. In this case, since the second rib body 42 exists when the molten metal surface passes in the width (thickness) direction of the first rib body 41, first, the area of the molten metal surface is once in the second rib body 42. Then, the area of the hot water surface is increased by the first rib body 41. Thereby, the change of the area of a hot water surface will be relieve | moderated and a hot water flow property will improve.

  As yet another embodiment, the valve body 11 may be cast in a T shape with the valve body accommodating portion 15 facing downward. In this case, since the end 41a of the first rib body 41 is not separated from the first step portion 36 but is connected to the first step portion 36, the molten metal surface is the first rib body. When 41 reaches the first step portion 36, the change in the surface area of the hot water is alleviated and the hot water flow is improved.

  Alternatively, the valve box 11 may be cast with the axis 23 of the body portion 13 in the vertical direction. In this case, the end portion 41 a of the first rib body 41 is similarly formed on the first step portion 36. Since it is connected, when the hot water surface approaches the first rib body 41 from the first step portion 36 (or when the hot water surface approaches the first step portion 36 from the first rib body 41), Change is eased and hot water flow is improved.

  In each of the above embodiments, as shown in FIG. 5, the radial height H3 from the outer peripheral surface 13a of the body portion 13 to the end portion 41a of the first rib body 41 is set from the outer peripheral surface 13a to the first step. Although it is slightly lower than the height H1 up to the portion 36, the height H3 may be the same height as the height H1.

  In each of the above embodiments, as shown in FIG. 5, the radial height H4 from the outer peripheral surface 13a of the body portion 13 to the end portion 42a of the second rib body 42 is set to the second step from the outer peripheral surface 13a. Although the height is the same as the height H2 up to the portion 37, the height H4 may be slightly higher than the height H2.

  In each of the above embodiments, as shown in FIG. 1, the gate valve 10 is described as an example of the valve. However, other types of valves other than the gate valve 10 may be used.

10 Gate valve (valve)
DESCRIPTION OF SYMBOLS 11 Valve box 12 Flow path 13 Body part 13a Body outer peripheral surface 14 Valve body 15 Valve body accommodating part 16 Valve rod 17 Valve shaft axis 18 Fluid inlet / outlet 19 Receiving port 21 Piping 22 Insertion port 23 Body axis 24 Lock ring storage groove 25 Insertion protrusion storage part 28 Lock ring 30 Insertion protrusion 36 First step part 37 Second step part 40 Rib 41 First rib body 41a End part 42 of the first rib body First 2nd rib body 42a End part 50 of the 2nd rib body 3rd rib body (another rib body)
H1 Radial height from the outer peripheral surface of the body portion to the outer peripheral surface of the first step portion H2 Radial height from the outer peripheral surface of the body portion to the outer peripheral surface of the second step portion H3 Outer surface of the trunk portion To the end of the first rib body H4 in the radial direction from the outer peripheral surface of the body portion to the end of the second rib body W1 The width W2 of the first rib body Width of rib body W3 Width of third rib body

Claims (6)

Has a receiving port at the fluid inlet / outlet,
Insert the insertion port formed in the pipe of the connection partner into the receiving port,
A valve having a valve box formed by crossing a cylindrical body portion having a flow path through which a fluid flows and a valve body housing portion for housing a valve body in an inverted T shape,
Fluid inlets and outlets are formed at both ends of the trunk,
Ribs are provided at the corners where the outer peripheral surface of the body part and the outer surface of the valve body storage part intersect,
The rib has a first rib body and a second rib body,
The first rib body extends from the axial direction of the valve stem along the axial direction of the trunk,
The second rib body is provided on both sides of the first rib body on the outer peripheral surface of the body portion, and extends along the axial direction of the body portion.
A valve characterized in that the width of the second rib body in the circumferential direction of the body portion is wider than the width of the first rib body. First and second stepped portions that protrude radially outward from the outer peripheral surface of the body portion are formed at the receiving port,
The second step is disposed on the back side of the first step,
The radial height from the outer peripheral surface of the trunk portion to the outer peripheral surface of the first step portion is formed higher than the radial height from the outer peripheral surface of the trunk portion to the outer peripheral surface of the second step portion,
The first rib body is provided connected to the first step portion from the valve body housing portion,
2. The valve according to claim 1, wherein the second rib body is connected to the second step portion from the valve body housing portion and is provided on the outer peripheral surface of the body portion. At the end where the first rib body is connected to the first step portion, the radial height from the outer peripheral surface of the trunk portion to the end portion of the first rib body is the first step portion from the outer peripheral surface of the trunk portion. The valve according to claim 2, wherein the height is equal to or less than the height in the radial direction to the outer peripheral surface. In the end portion where the second rib body is connected to the second step portion, the radial height from the outer peripheral surface of the trunk portion to the end portion of the second rib body is the second step portion from the outer peripheral surface of the trunk portion. The valve according to claim 2 or 3, wherein the height is substantially the same as the height in the radial direction to the outer peripheral surface of the valve. A lock ring storage groove is formed on the inner surface of the receiving port,
The lock ring fitted in the lock ring storage groove is configured such that the insertion projection on the outer surface of the insertion port is engaged from the back of the receiving port,
On the back side of the lock ring storage groove, an insertion projection storage portion for storing the inserted insertion projection is formed,
The first step portion is a step portion having a lock ring storage groove inside,
The valve according to any one of claims 2 to 4, wherein the second step portion is a step portion having an insertion opening storing portion therein. One or more other rib bodies are provided between the first rib body and the second rib body,
The width of another rib body in the circumferential direction of the body portion is wider than the width of the first rib body, narrower than the width of the second rib body, and narrower toward the upper stage. The valve according to claim 5.

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