JP2020060235A - Housing device - Google Patents

Abstract

To provide a housing device which can prevent the hooking of a valve body while guiding rotations of the valve body disposed between an inner peripheral surface of a branch case body and an outer peripheral surface of a fluid pipe.SOLUTION: A housing device 9 is provided with a valve body 3 which rotates in a pipe peripheral direction between an inner peripheral surface of a branch case body 1 and an outer peripheral surface of a water service pipe K, and is configured to open/close a branch channel communicating an opening provided on a pipe wall of the water service pipe K and a connection pipe. A guide surface 17 which is opposite to an end surface of the valve body 3 in a pipe axial direction and guides rotations of the valve body 3 is provided on the branch case body 1 in the pipe peripheral direction, and on the end surface of the valve body 3 or the guide surface 17 opposite thereto, a projection portion 39 having a round shape is provided.SELECTED DRAWING: Figure 4

Description

  The present invention relates to a housing device mounted on an existing fluid pipe.

  2. Description of the Related Art Conventionally, there is known a construction method in which a pipe wall of a fluid pipe such as a water pipe is perforated in an uninterrupted flow state and a branch flow path is formed through an opening provided thereby. In this construction method, a branch case body that surrounds the outer peripheral surface of the existing fluid pipe in a sealed state and a valve device that opens and closes the branch flow path are used. Patent Document 1 describes a branch pipe connecting device including a sluice valve as a valve device. This sluice valve has a valve body inside a main body (valve box) connected to a branch case body, and is configured so that a branch flow path can be opened / closed in accordance with a lifting operation of the valve body.

  In Patent Document 2, a device is proposed in which a valve body is arranged between an inner peripheral surface of a branch case body and an outer peripheral surface of a fluid pipe, and the valve body is rotated in the pipe circumferential direction to open and close a branch flow path. Has been done. According to this, since the main body (valve box) connected to the branch case body is omitted, it becomes possible to downsize the punching machine used for drilling the fluid pipe. In such a structure for rotating the valve body, it is important to properly guide the rotation of the valve body so as to prevent the situation where the valve body is caught inside the branch case body and cannot be rotated.

  As a result of diligent research by the present inventor, even if the valve body is provided with a structure for guiding the rotation of the valve body, the valve body tends to be caught inside the branch case body when the valve body is biased in the pipe axis direction. , It turned out that there is room to improve this. In the device described in Patent Document 2, the guide support portion provided on the inner peripheral surface of the branch case body is brought into contact with the inner peripheral surface of the valve body, or a slit-shaped valve seat provided at the end portion of the connecting pipe. Although it has a structure for inserting the valve body in the above, since any of them guides the rotation of the valve body from the pipe radial direction, it is not possible to prevent the valve body from being caught as described above.

JP, 2007-309474, A JP, 2014-20474, A

  The present invention has been made in view of the above circumstances, and an object thereof is to guide the rotation of a valve body arranged between an inner peripheral surface of a branch case body and an outer peripheral surface of a fluid pipe, while the valve body is being guided. An object of the present invention is to provide a housing device that can prevent the user from being caught.

  A casing device according to the present invention includes a plurality of divided cases including a first divided case and a second divided case, and a branch case body that hermetically surrounds an outer peripheral surface of a fluid pipe via a sealing material. Between the connection pipe that is connected to the branch case body with the end portion sandwiched between the first split case and the second split case, and between the inner peripheral surface of the branch case body and the outer peripheral surface of the fluid pipe. A valve body configured to open and close a branch flow path that rotates along a pipe circumferential direction and connects an opening provided in a pipe wall of the fluid pipe and the connection pipe, and in a pipe axial direction. A guide surface that faces the end surface of the valve body and guides the rotation of the valve body is provided in the branch case body along the pipe circumferential direction, and the end surface of the valve body or the guide surface facing the end surface is rounded. A ridge having a ridged shape is provided.

  With such a configuration, the rotation of the valve body arranged between the inner peripheral surface of the branch case body and the outer peripheral surface of the fluid pipe is guided from the pipe axis direction by the guide surface. Moreover, since the rounded ridge portion secures the gap between the end surface of the valve body and the guide surface facing it, the valve body can be prevented from being caught and the valve body can be smoothly rotated. . Further, in this casing device, since the end portion of the connecting pipe is sandwiched between the first split case and the second split case that form the branch case body, when an external force such as an earthquake acts on the connection pipe, There is an advantage that it is difficult to open between the first divided case and the second divided case.

  It is preferable that the raised portion is formed in a hemispherical shape. This can effectively prevent the valve body from being caught.

  The raised portion may be formed by locally raising the end surface of the valve body or the guide surface facing the end surface. With such a configuration, it is possible to omit the trouble of forming the raised portion. Further, since the strength of the raised portion is ensured, the guiding action is exhibited well.

  The raised portion may be formed by a head of a screw attached to the valve body or the branch case body. According to this structure, the raised portion can be easily provided on the existing valve body or the branch case body.

  The valve body is formed of an annular body having a circumferentially divided structure having a pair of divided portions, and the raised portions are provided at a plurality of locations in the pipe circumferential direction including two portions which are intermediate portions of the pair of divided portions. Is preferably provided. As a result, it is possible to prevent the valve body from being caught at a plurality of positions in the pipe circumferential direction with good balance.

A perspective view showing an example of a casing device according to the present invention. FIG. 3 is a perspective view showing a state where the second split case is removed from the housing device. Side view of the casing device seen from the tube axis direction Vertical cross-sectional view of housing device Vertical cross-sectional view of housing device Perspective view of the valve body and sealing material extracted FIG. 3 is a perspective view showing a state where the second split case is removed from the housing device. Perspective view of valve body Four-sided view showing the first divided piece Four-sided view showing the second divided piece (A) Three-sided view and (B) C-C cross-sectional view of the packing attached to the valve body Enlarged view of the joint part of the valve body The figure which shows the circumferential direction edge part of a 1st and 2nd division piece. (A) Vertical cross-sectional view of the casing device at the time of fully closing and (B) at the time of fully opening The perspective view which shows the valve body which concerns on another embodiment. DD sectional view of FIG.

  Embodiments of the present invention will be described with reference to the drawings.

  FIG. 1 shows a casing device 9 mounted on an existing water pipe K (an example of a fluid pipe). FIG. 2 shows a state in which the second split case 12 is removed from the casing device 9. FIG. 3 is a side view of the casing device 9 as seen from the tube axis direction. Unless otherwise specified, the “pipe circumferential direction”, “pipe axial direction”, and “pipe radial direction” in the present specification refer to the circumferential direction, axial direction, and radial direction of the water pipe K, respectively. For the sake of convenience of illustration, both sides of the water pipe K are shown in cross section, but in reality, the water pipe K extends along the pipe axis direction, and water as a fluid flows inside thereof. The water pipe K is made of ductile cast iron.

  As shown in FIGS. 1 to 3, the housing device 9 includes a branch case body 1, a connecting pipe 2, and a valve body 3. The branch case body 1 is composed of a plurality of divided cases including a first divided case 11 and a second divided case 12, and surrounds the outer peripheral surface of the water pipe K in a sealed state with a sealing material 4 (see FIG. 6). . In the present embodiment, the branch case body 1 is composed of a first divided case 11 arranged below the water pipe K and a second divided case 12 arranged above the water pipe K, which are annular. It is joined to and surrounds a part of the water pipe K. The branch case body 1 is formed of, for example, ductile cast iron.

  The branch case body 1 is formed of a split T-shaped tube having an upper and lower split structure, and has split portions 10 and 10 at two locations in the pipe circumferential direction. In each divided portion 10, a pair of flange-shaped joining surfaces 13 and 13 are opposed to each other. The pair of joint surfaces 13 and 13 are provided at the circumferential ends of the first and second split cases 11 and 12, respectively. A fastener 14 composed of a bolt and a nut is attached to each of the divided portions 10. Each joint surface 13 is provided with a bolt hole for inserting the bolt of the fastener 14. By tightening the split portion 10 with the fastener 14, the first split case 11 and the second split case 12 are joined to each other.

  The connection pipe 2 is connected to the branch case body 1 with the end portion 2a sandwiched between the first divided case 11 and the second divided case 12. A lid or a branch pipe (not shown) is connected to the end 2b of the connection pipe 2 exposed from the branch case body 1. The end 2b is formed as a socket having a flange, but is not limited to this. An opening 20 is provided on the pipe wall of the water pipe K (see FIG. 5), and a branch flow passage that connects the opening 20 and the connection pipe 2 is formed from the main flow passage along the pipe axial direction of the water pipe K. It is formed by branching. The opening 20 is provided by piercing the pipe wall of the water pipe K in an uninterrupted water state using a piercing machine such as a hole saw.

  FIG. 4 is a vertical cross-sectional view of the housing device 9 taken along a plane including the pipe axis of the water pipe K and corresponds to a cross-sectional view taken along the line AA of FIG. FIG. 5 is a vertical cross-sectional view of the housing device 9 taken along a plane including the pipe axis of the connecting pipe 2, and corresponds to a cross-sectional view taken along the line BB of FIG. In FIGS. 4 and 5, the valve element 3 is arranged with the first divided piece 31 described below facing upward. FIG. 6 is a perspective view showing the valve element 3 and the sealing material 4 in an extracted manner, and the valve element 3 is drawn in a simplified manner. Since the sealed space is partitioned by the sealing material 4 inside the branch case body 1, the water flowing out from the opening 20 does not leak to the outside.

  As shown in FIGS. 4 to 6, the sealing material 4 is composed of a plurality of packings, and is composed of eight packings 41 to 48 in this embodiment. The packings 41 and 42 are attached to the first split case 11, respectively. The packings 43 and 44 are attached to the second split case 12, respectively. The gap of the divided portion 10 in which the end portion 2a of the connecting pipe 2 is sandwiched is sealed by the packing 41 and the packing 43, and the gap of the other divided portion 10 is sealed by the packing 42 and the packing 44. Of the both ends of the packings 41 to 44, one contacts the annular body formed by the packing 45 and the packing 46, and the other contacts the annular body formed by the packing 47 and the packing 48.

  The packings 45 and 46 are each formed in an arc shape, and they extend in an annular shape so as to be continuous in the pipe circumferential direction. The gap between the inner peripheral surface of one end of the valve body 3 and the outer peripheral surface of the water pipe K in the pipe axis direction, and the gap between the inner peripheral surface of the branch case body 1 and the outer peripheral surface of one end of the valve body 3 are: It is sealed by the packing 45 and the packing 46. The packings 47 and 48 are each formed in an arc shape, and they extend in an annular shape so as to be continuous in the pipe circumferential direction. A gap between the inner peripheral surface of the other end of the valve body 3 and the outer peripheral surface of the water pipe K in the pipe axis direction, and a gap between the inner peripheral surface of the branch case body 1 and the outer peripheral surface of the other end of the valve body 3. Are sealed by packing 47 and packing 48.

  The valve body 3 rotates in the circumferential direction between the inner peripheral surface of the branch case body 1 and the outer peripheral surface of the water pipe K, and can open and close the branch flow path connecting the opening 20 and the connection pipe 2. Is configured. In FIG. 2, the end portion 2a of the connecting pipe 2 is closed by the valve body 3, and the branch flow passage is closed. When the valve body 3 is rotated as shown in FIG. 7 to open the end 2a, the branch passage is opened. As shown in FIG. 8, the valve element 3 is formed in an annular shape by joining a plurality of divided pieces including the first divided piece 31 and the second divided piece 32. The first divided piece 31 is formed of a plate-like member that is curved in an arc shape along the pipe circumferential direction, and the second divided piece 32 has a length in the pipe axis direction smaller than that of the first divided piece 31 and a pipe circumference. It is formed of a band-shaped member curved in an arc shape along the direction.

  FIG. 9 is a four-sided view showing the first divided piece 31, and FIG. 10 is a four-sided view showing the second divided piece 32. As shown in FIGS. 8 to 10, the valve body 3 of the present embodiment is composed of one first division piece 31 and a pair of second division pieces 32, 32. One of the pair of second divided pieces 32, 32 is joined to one end of the first divided piece 31 to form an annular shape, and the other is joined to the other end of the first divided piece 31 to form an annular shape. The valve body 3 is formed of an annular body having a circumferentially divided structure having a pair of divided portions 30 and 30. The valve body 3 thus formed in an annular shape has higher strength than the valve body formed in an arc shape, and can prevent rattling and displacement during the opening / closing operation of the branch flow path, and the waterproof performance ( The blocking performance) can be exhibited well.

  Further, in the casing device 9, as described above, the branch case body 1 has an upper and lower split structure, and the end portion 2a of the connection pipe 2 is sandwiched between the split portions 10. According to this structure, the bolts of the fastener 14 are oriented vertically, so that even if an external force such as an earthquake acts on the connecting pipe 2, the gap between the split portions 10 (the first split case 11 and the second split case 12 is different from each other). Between) is difficult to open. On the other hand, if the branch case body is divided into left and right parts and the fastener bolts are oriented horizontally, the bolts will expand when an external force such as an earthquake acts on the connecting pipe, and The gap is easy to open.

  The first and second divided pieces 31 and 32 are made of ductile cast iron, but may be made of other materials such as steel and resin. The first split piece 31 is formed to be larger than the opening 20 in the tube circumferential direction and the tube axis direction so that the opening 20 can be closed. A seal material 33 is attached to the outer peripheral surface of the first divided piece 31. The sealing material 33 contacts the end surface of the connecting pipe 2 when closing the branch flow path. The sealing material 33 is formed in a ring shape, but is not limited to this. Instead of the outer peripheral surface of the valve body 3, the seal material 33 may be attached to the end surface of the connecting pipe 2. The first divided piece 31 has four connecting portions 31p projecting from the four corners in the pipe circumferential direction, and the circumferential end portions of the second divided piece 32 are connected to each of them.

  FIG. 11 is a (A) three-sided view and a (B) C-C cross-sectional view of the packing 46 attached to the second divided piece 32. The packing 46 has a hollow portion 46e extending in an arc shape, and itself is curved in an arc shape along the pipe circumferential direction. The hollow portion 46e penetrates the packing 46 in the tube axis direction, and the packing 46 is formed in an annular shape. This annular packing 46 is attached around the second divided piece 32 (see FIG. 8), and is provided between the inner peripheral surface of the second divided piece 32 and the outer peripheral surface of the water pipe K and inside the branch case body 1. The space between the peripheral surface and the outer peripheral surface of the second divided piece 32 is sealed by packings 46, respectively. The second split piece 32 is provided with a packing groove 32g for mounting the packing 46 along the pipe circumferential direction.

  The packings 45, 47, 48 are also formed in an annular shape like the packing 46. The packings 45 and 47 are respectively mounted around the ends of the first divided piece 31, between the inner peripheral surfaces of both ends of the first divided piece 31 and the outer peripheral surface of the water pipe K, and the branch case body 1 The inner peripheral surface of the first divided piece 31 and the outer peripheral surfaces of both ends of the first divided piece 31 are sealed by packings 45 and 47, respectively. A packing groove 31g for mounting the packings 45 and 47 is provided on the first divided piece 31 along the pipe circumferential direction. The packing 48 is attached to the second split piece 32 in the same manner as the packing 46. According to such a mounting structure, it is possible to appropriately prevent the displacement of the packings 46 to 48 that rotate together with the valve body 3.

  If the packing 45 partially protrudes from the packing groove 31g, when the valve body 3 is rotated, the protruding part is located between the inner peripheral surface of the valve body 3 and the outer peripheral surface of the water pipe K. Alternatively, it may be sandwiched between the inner peripheral surface of the branch case body 1 and the outer peripheral surface of the valve body 3, which may increase the resistance in the rotation of the valve body 3. Therefore, it is desirable to set the groove width of the packing groove 31g larger than usual to suppress the protrusion of the packing 45. For example, in the packing groove 31g having a shape in which the groove width gradually expands from the groove bottom toward the opening, in the opening, a gap of 1.5 mm or more is provided between the side surface of the uncompressed packing 45 and the groove wall of the packing groove 31g. It is conceivable to set so that The same applies to the packings 46 to 48.

  The valve body 3 has a joint portion 34 in which the circumferential end portion of the first divided piece 31 (the end portion of the connecting portion 31p) and the circumferential end portion of the second divided piece 32 are butted against each other. As shown in FIGS. 12 and 13 in an enlarged manner, a joining tool 35 including a bolt 35b and a nut 35n is attached to the joining portion 34. In the present embodiment, in each of the joining portions 34, a pair of joining tools 35 are arranged at intervals in the tube axis direction. Thereby, the tightening by the joining tool 35 is stabilized, and the twist of the second divided piece 32 with respect to the first divided piece 31 can be prevented. Further, by tightening the joint portion 35, the circumferential ends of the packings 45 and 46 (and the packings 47 and 48) are in close contact with each other.

  The first divided piece 31 and the second divided piece 32 are formed with bolt holes 31h and 32h, respectively, into which the bolt 35b is inserted. The bolt hole closer to the head of the bolt 35b, that is, the bolt hole 32h of the second divided piece 32 in the present embodiment, is provided in an elliptical shape. The base end portion of the bolt 35b is also provided in an elliptical shape, and this is fitted into the elliptical bolt hole 32h. As a result, a detent structure for preventing the rotation of the bolt 35b with respect to the second divided piece 32 is configured, so that it is not necessary to fix the head of the bolt 35b when tightening the nut 35n, and the workability is improved.

  As shown in FIGS. 12 and 13, the circumferential end portion of the first split piece 31 (the end portion of the connecting portion 31p) and the circumferential end portion of the second split piece 32 have a concavo-convex shape that fits together. At the joint portion 34, a metal touch is made in three directions: the pipe circumferential direction, the pipe axial direction, and the pipe radial direction. As a result, rattling and displacement of the joint portion 34 in each direction can be prevented, and the strength of the valve body 3 can be effectively increased. Further, at the joint portion 34, the packing 45 and the packing 46 are butted against each other so as to be continuous in the circumferential direction. Since the packing 45, 46 has flat circumferential end portions, it is easy to bring them into close contact with each other. The same applies to the packings 47 and 48.

  As shown in FIGS. 2, 7 and 8, the valve body 3 is provided with a gear 36. The gear 36 is formed in an arc shape along the pipe circumferential direction. The gear 36 constitutes a rotation mechanism that rotates the valve body 3 together with a gear 50 described later. At the end of the gear 36, a stopper portion 36s that does not mesh with the gear 50 is formed. The gear 36 is configured as a member separate from the first and second divided pieces 31 and 32, and is fixed by a screw 37. In the present embodiment, the gear 36 is fixed to the first divided piece 31, but it may be fixed to the second divided piece 32. The gear 36 is formed of, for example, ductile cast iron, but is not limited to this.

  The rotation operation of the valve body 3 is performed by the operation unit 5 provided in the branch case body 1. As shown in FIGS. 2 and 7, the operation unit 5 includes a gear 50 that meshes with a gear 36 provided on the valve body 3. The gear 50 is composed of a spur gear having a rotating shaft 50a oriented in the horizontal direction (more specifically, the pipe axis direction of the water pipe K). The branch case body 1 is detachably provided with a cover 51 that covers the gear 50 (see FIG. 1). By operating the rotary shaft 50a exposed from the cover 51, the valve body 3 can be rotated. It is also possible to attach a gear box having an operation shaft directed upwards to the side of the cover 51 and operate the rotary shaft 50a via the operation shaft.

  FIG. 14 is a vertical cross section of the casing device 9 taken along a plane passing through the operation unit 5. A through hole 15 is provided in (the second divided case 12 of) the branch case body 1, and a part of the gear 50 that has entered the inside of the branch case body 1 through the through hole 15 meshes with the gear 36. There is. The gear 36 is arranged outside the sealed space defined by the seal material 4, and does not come into contact with water even when the branch flow path is open, which is advantageous in terms of corrosion resistance and maintenance of the operation unit 5. Further, it is not necessary to secure the watertightness of the through hole 15, and the cover 51 can have a simple structure. Further, even when a lubricant such as grease is applied to the gear 36, it does not affect the water quality.

  FIG. 14A shows a fully closed state in which the branch flow channel is completely closed, and corresponds to FIG. In this state, the first divided piece 31 faces the opening 20, and the sealing material 33 contacts the end surface of the connection pipe 2. Positioning protrusions 16 that come into contact with the stopper portions 36s are provided on the inner peripheral surface of the branch case body 1. When closing the branch flow passage, the valve body 3 may be rotated clockwise in FIG. 14 until the stopper portion 36s comes into contact with the positioning protrusion 16. FIG. 14 (B) shows a state in which the branch channel is completely opened and fully opened, and corresponds to FIG. 7. In this state, the first divided piece 31 moves away from the opening 20, and the end surface of the connecting pipe 2 is opened. When opening the branch channel, the valve body 3 may be rotated in the counterclockwise direction in FIG. 14 until the gear 50 is locked by the stopper portion 36s and cannot rotate.

  As shown in FIG. 4, the branch case body 1 is provided with a guide surface 17 that faces the end surface of the valve body 3 in the pipe axis direction and guides the rotation of the valve body 3 along the pipe circumferential direction. As a result, the rotation of the valve body 3 is guided by the guide surface 17 from the pipe axis direction. An axial end portion of the branch case body 1 is provided in an inner flange shape, and an inner wall surface thereof is formed as a guide surface 17. The guide surface 17 is arranged outside the sealed space defined by the sealing material 4. At one end of the valve element 3, the gear 36 and the protrusion 38 are guided by the guide surface 17, and at the other end of the valve element 3, the pair of protrusions 38, 38 are guided by the guide surface 17. The protrusion 38 is provided so as to protrude from the side surfaces of the first and second divided pieces 31 and 32 in the pipe axis direction.

  As shown in FIGS. 4 and 8, rounded ridges 39 are provided on the side surface of the gear 36 and the side surface of the protrusion 38, which are the end surfaces of the valve body 3. As a result, a gap is secured between the end surface of the valve body 3 and the guide surface 17 that faces the end surface, and the valve body 3 is not biased in the pipe axis direction. As a result, the valve body 3 can be prevented from being caught inside the branch case body 1, and the valve body 3 can be smoothly rotated. Although it is possible to provide the raised portion 39 on the guide surface 17, it is preferable to provide the raised portion 39 on the end surface of the valve body 3 from the viewpoint of preventing the gear 36 and the protrusion 38 from being caught.

  In the present embodiment, since the raised portion 39 is formed in a hemispherical shape, the contact surface with the guide surface 17 is substantially point-shaped, and it is easy to make sliding contact with the guide surface 17, and therefore the smoothness of the valve body 3 is achieved. It does not hinder proper rotation. The raised portion 39 provided on the gear 36 is formed by the head of the screw 37, but is not limited to this, and is formed by locally raising the side surface of the gear 36 that is the end face of the valve body 3. But it's okay. The raised portion 39 provided on the protrusion 38 is formed by casting and is formed by locally raising the side surface of the protrusion 38, which is the end face of the valve body 3, but is not limited to this. It may be formed by the heads of the screws attached to 3. A pan head screw is preferably used as the screw forming the raised portion 39.

  As described above, the valve body 3 is formed of an annular body having a circumferentially divided structure having the pair of divided portions 30 and 30. The raised portions 39 are arranged at a plurality of locations in the pipe circumferential direction including two locations which are intermediate portions of the pair of divided portions 30, 30. As a result, it is possible to prevent the valve body 3 from being caught at a plurality of locations in the pipe circumferential direction with good balance. In the present embodiment, a large number (specifically, twelve) of raised portions 39 are provided on the side surface of the gear 36, and one raised portion 39 is provided on the side surface of each protrusion 38.

  In the present embodiment, as shown in FIG. 3, the branch case body 1 is provided with a rotation stopper projection 18 that comes into contact with the outer peripheral surface of the water pipe K to prevent relative rotation of the branch case body 1 with respect to the water pipe K. Accordingly, the branch case body 1 is prevented from rotating when the operation portion 5 is operated, and the valve body 3 can be reliably rotated. The rotation stopper protrusions 18 are provided at a plurality of locations in the pipe circumferential direction (six locations at substantially equal intervals in this embodiment). The rotation stopper projection 18 is formed by locally projecting an axial end portion of the branch case body 1 provided in an inner flange shape inward in the pipe radial direction. The anti-rotation protrusion 18 is formed in a substantially trapezoidal shape, but the invention is not limited to this, and the anti-rotation action may be enhanced by forming a wedge shape that is tapered in a V shape, for example.

  In the split portion 10 of the branch case body 1, the pair of joint surfaces 13 and 13 are metal-touched. For this reason, the deformation (particularly bulging upward) of the branch case body 1 due to water pressure is suppressed. As shown in FIG. 3, since the pair of joint surfaces 13 and 13 are metal-touched via the boss 13b protruding in the pipe circumferential direction, a gap is provided in the split portion 10 even when the fastener 14 is tightened. According to such a configuration, it is possible to prevent the fastener 14 from being excessively tightened and to keep the gap between the divided portions 10 constant, so that the distance between the inner peripheral surface of the branch case body 1 and the outer peripheral surface of the valve body 3 is stable. The valve body 3 can be smoothly rotated. Further, after the rotation stopping projection 18 contacts the outer peripheral surface of the water pipe K, it is possible to suppress unnecessary tightening of only the boss 13b.

  The construction for piercing the water pipe K by the uninterrupted water method will be briefly described. First, the valve body 3 is attached to the water pipe K by connecting the first divided piece 31 and the second divided piece 32 in an annular shape so as to surround a part of the existing water pipe K. Next, the branch case body 1 is externally fitted so as to cover the valve body 3. At that time, the divided portion 10 of the branch case body 1 is fastened with the fastener 14, the end portion 2a of the connection pipe 2 is sandwiched, and the pair of joint surfaces 13 and 13 are metal-touched. After that, the gear 50, the cover 51, and the like are attached to the through holes 15 of the branch case body 1, and the operation unit 5 is installed.

  Subsequently, a punching machine (not shown) equipped with a hole saw is connected to the connecting pipe 2. Then, a hole saw is inserted into the inside of the branch case body 1 through the connecting pipe 2, and the pipe wall of the water pipe K is perforated in the uninterrupted water state to provide the opening 20. It goes without saying that the first divided piece 31 of the valve body 3 is kept away from the end 2a of the connecting pipe 2 so as not to interfere with the hole saw (see FIG. 7). When the perforation is completed, the hole saw is pulled back together with the section, and the valve body 3 is rotated by the operation portion 5 to close the end portion 2a of the connecting pipe 2. After that, the punching machine equipped with the hole saw is removed from the connecting pipe 2, and the lid and the branch pipe are connected to the connecting pipe 2 as required.

  By the construction as described above, a branch flow path that connects the opening 20 and the connection pipe 2 is formed. The branch flow passage is switched between a water-passing state and a water-stopping state according to the turning operation of the valve body 3. Thus, the valve body 3 can be used instead of the conventional sluice valve in the uninterrupted water branching method. When the main flow path is stopped using the branch flow path, after removing the hole saw from the connection pipe 2, an insertion machine (not shown) is connected, and a valve (plug) is provided inside the water pipe K through the opening 20. insert. It is also possible to remove the valve body 3 after stopping the water and reuse it in another construction. In this way, the valve element 3 can be used in place of the conventional working valve in the uninterrupted water insert method.

  In the above-described embodiment, the example in which the space between the valve body 3 and the end portion 2a of the connection pipe 2 is sealed by the sealing material 33 has been shown, but the invention is not limited to this, and for example, the opening of the valve body 3 and the water pipe K may be formed. It may have a structure in which the space between 20 and 20 is sealed. In that case, it is conceivable that a sealing material is attached to the inner peripheral surface of the first divided piece 31 and the inner peripheral surface of the first divided piece 31 and the outer peripheral surface of the water pipe K are sealed by the sealing material. To be According to this configuration, water does not spread around the valve body 3 in a state where the branch flow passage is closed, so that the concern of water leakage is reduced.

  In the above-described embodiment, the example in which the gear 36 is configured as a member separate from the first and second split pieces 31 and 32 is shown, but the invention is not limited to this, and the first split that configures the valve body. It may be configured integrally with the piece or the second divided piece (that is, as the same member). Further, in the above-described embodiment, the rotation mechanism of the valve body 3 uses the gear 36, but the structure is not limited to this, and the valve body may not be provided with a gear.

  In the above-described embodiment, the example in which the valve body 3 is composed of one first divided piece 31 and the pair of second divided pieces 32, 32 is shown, but the present invention is not limited to this. For example, the valve body 6 shown in FIGS. 15 and 16 may be configured by one first divided piece 61 and four second divided pieces 62. A pair of second divided pieces 62, 62 connected in an annular shape are connected to both ends of the first divided piece 61 via bolts 63, and one of the second divided pieces 62 is provided with a gear 66. ing. The valve body 6 has a joint 64 in which a circumferential end of the second divided piece 62 and another circumferential end of the second divided piece 62 are abutted against each other.

  In the above embodiment, the example in which the valve body 3 is formed in an annular shape by joining a plurality of divided pieces including the first divided piece 31 and the second divided piece 31 has been shown, but the present invention is not limited to this. Therefore, for example, the valve body may be formed in an arc shape as a whole.

  In the above-described embodiment, an example in which the housing device is attached to the water pipe K as a ductile cast iron pipe has been shown, but the present invention is not limited to this, and a fluid pipe formed of another material such as a steel pipe or a vinyl chloride pipe is targeted. You can also

  The casing device according to the present invention is applicable to a water pipe, but is not limited to this, and can be widely applied to fluid pipes used for fluids such as various liquids other than water and gas.

  The present invention is not limited to the embodiments described above, and various improvements and modifications can be made without departing from the spirit of the present invention.

1 Branch Case Body 2 Connection Pipe 3 Valve Body 4 Sealing Material 5 Operating Unit 9 Casing Device 10 Dividing Unit 11 First Dividing Case 12 Second Dividing Case 17 Guide Surface 20 Opening 37 Screw 38 Protrusion 39 Raised K Water Pipe ( (Example of fluid pipe)

Claims (5)

A branch case body that is composed of a plurality of split cases including a first split case and a second split case, and that surrounds the outer peripheral surface of the fluid pipe in a sealed state via a sealing material;
A connecting pipe having an end portion sandwiched between the first split case and the second split case and connected to the branch case body;
A branch flow that rotates along the pipe circumferential direction between the inner peripheral surface of the branch case body and the outer peripheral surface of the fluid pipe and connects the opening provided in the pipe wall of the fluid pipe and the connection pipe. A valve body configured to open and close the passage,
A guide surface that faces the end surface of the valve element in the pipe axis direction and guides the rotation of the valve element is provided in the branch case body along the pipe circumferential direction, and the end surface of the valve element or the guide that faces the end surface. A casing device in which a rounded ridge is provided on the surface.   The housing device according to claim 1, wherein the raised portion is formed in a hemispherical shape.   The housing device according to claim 1, wherein the raised portion is formed by locally raising an end surface of the valve body or the guide surface facing the end surface.   The casing device according to claim 1, wherein the raised portion is formed by a head portion of a screw attached to the valve body or the branch case body.   The valve body is formed of an annular body having a circumferentially divided structure having a pair of divided portions, and the raised portions are provided at a plurality of locations in the pipe circumferential direction including two portions which are intermediate portions of the pair of divided portions. The casing device according to any one of claims 1 to 4.

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