Housing device

Abstract

To provide a housing device capable of reducing size while suppressing deformation by external force.SOLUTION: A valve gear 1 includes: an outer case 2 surrounding and mounted on an existing water pipe K; an insertion body 3, inserted toward a second side UD2 from a first side UD1 in a first direction UD orthogonal to a pipe axial direction AD of the water pipe K, which is housed in the outer case 2, and which is inserted into a cutting part of the water pipe K; and a first packing 4 which seals between the outer case 2 and the insertion body 3. The outer case 2 includes a circular arc part 20 fixed to the water pipe K, and an opening cylindrical part 22 that extends toward the first side UD1 in the first direction UD from the circular arc part 20, and into which the insertion body 3 can be inserted. The opening cylindrical part 22 includes a first rib 23 disposed on one side in the pipe axial direction AD and a second rib 24 disposed on the other side in the pipe axial direction AD. The first rib 23 and the second rib 24 protrude from an inner peripheral surface 22a of the opening cylindrical part 22 to an inner side RD1 in a radial direction of the opening cylindrical part 22, and extend in a circumferential direction CD1 of the opening cylindrical part 22.SELECTED DRAWING: Figure 3

Description

[Technical field]

[0001] The present disclosure relates to a housing device that is attached to a fluid pipe, such as a water pipe. [Background technology]

[0002] Patent Document 1 discloses a housing device that includes an outer box to be attached to an existing fluid pipe (water pipe) and an insert housed in the outer box. The insert has a valve body that switches or blocks a flow path. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2019-143683 A Summary of the Invention [Problem to be solved by the invention]

[0004] Since the outer box is fixed to the fluid pipe, when a separation force acts on the fluid pipe in the axial direction, the outer box is pulled and deformed in the axial direction. However, if the outer box is made thicker or a reinforcing member is provided on the outside of the outer box, the outer box will become larger.

[0005] The present disclosure provides a housing device that is capable of suppressing deformation due to an external force and achieving miniaturization. [Means for solving the problem]

[0006] The housing device of the present disclosure comprises an outer box that is attached to surround an existing fluid pipe, an insert that is inserted from a first side to a second side in a first direction perpendicular to the pipe axis direction of the fluid pipe and housed in the outer box, and is inserted into a cut portion of the fluid pipe, and a first gasket that seals between the outer box and the insert, wherein the outer box has an arc portion fixed to the fluid pipe, and an opening tubular portion extending from the arc portion toward the first side in the first direction and into which the insert can be inserted, and the opening tubular portion has a first rib arranged on one side in the pipe axis direction and a second rib arranged on the other side in the pipe axis direction, and the first rib and the second rib protrude radially inward from an inner surface of the opening tubular portion and extend circumferentially of the opening tubular portion. [Brief description of the drawings]

[0007] [Figure 1] 1 is a first side view of a valve device according to a first embodiment of the present disclosure, as viewed from a side perpendicular to a pipe axis direction. [Diagram 2] FIG. 2 is a second side view of the valve device seen from a viewpoint parallel to the pipe axis direction. [Diagram 3] 3 is a cross-sectional view taken along line III-III in FIG. 2. [Figure 4] 4 is a plan view of the valve device as seen parallel to the axis of the tubular opening before the insert is inserted into the outer box; FIG. [Diagram 5] FIG. [Figure 6] 1A is a perspective view, a first side view, a second side view, and a bottom view of an insert; [Figure 7A] 5 is a diagram corresponding to FIG. 4 and showing the positional relationship between the insert body inserted in a correct posture and the first and second ribs. [Figure 7B] 5 is a diagram corresponding to FIG. 4 and illustrating the positional relationship between the insert and the first and second ribs when the insert is inserted in an incorrect position. [Figure 8] FIG. 2 is a partially exploded perspective view showing the insert, the outer box, and the water pipe being inserted in the correct position. [Figure 9] FIG. 2 is a partially exploded perspective view showing the insert, the outer box, and the water pipe being inserted in an incorrect position. [Figure 10] FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0008] [First embodiment] Hereinafter, a housing device according to a first embodiment of the present disclosure will be described with reference to the drawings. The housing device of the first embodiment is a valve device 1 having a gate valve that blocks a flow path of an existing water pipe K (an example of a fluid pipe).

[0009] FIG. 1 is a first side view of the valve device 1 seen from a side perpendicular to the pipe axis direction AD. FIG. 2 is a second side view of the valve device 1 seen from a viewpoint parallel to the pipe axis direction AD. FIG. 3 is a cross-sectional view of the III-III portion in FIG. 2, showing only the outer box 2 and the outer lid 7 cut away, and showing the insert 3 uncut. In FIG. 3, the first packing 4 shown in its external appearance is colored in order to facilitate distinction on the drawing. FIG. 4 is a plan view of the valve device 1 seen from a line of sight parallel to the axis C1 of the opening tubular portion 22 in a state in which the water pipe K is cut and before the insert 3 is inserted into the outer box 2.

[0010] 1 to 4, the valve device 1 has an outer box 2 that is attached to surround a water pipe K, an insert 3 that is housed in the outer box 2, and a first packing 4 (also called an inner packing) that seals the gap between the outer box 2 and the insert 3. The insert 3 is inserted from a first side UD1 to a second side UD2 in a first direction UD perpendicular to the pipe axis direction AD of the water pipe K, and is inserted into a cut portion K1 of the water pipe K. In the first embodiment, the first direction UD is a vertical direction, the first side UD1 is an upper side, and the second side UD2 is a lower side.

[0011] The outer box 2 has a split structure composed of multiple split bodies 2A and 2B. Each split body 2A has an arc portion 20 that surrounds the outer circumferential surface of the water pipe K in a sealed state. The split bodies 2A and 2B are joined together to surround the water pipe K. The multiple arc portions 20 are joined together to surround the outer circumferential surface of the water pipe K. In the first embodiment, the multiple split bodies have an upper and lower two-split structure composed of an upper member 2A and a lower member 2B. The number of splits is not limited to two. The gap between the arc portion 20, which is a split body of the outer box 2, and the water pipe K is sealed by a second packing 5 (also called an outer packing). The second packing 5 extends in the circumferential direction of the water pipe K along the arc portion 20 and also extends along the mating surfaces of the split bodies 2A and 2B to seal the gap between the split bodies 2A and 2B (see FIG. 5). The second packing 5 is formed in an annular shape and is a packing separate from the first packing 4. Fig. 5 is a partial cross-sectional view of split body 2A viewed from below. In Fig. 5, the position where second packing 5 is disposed is shown in color. Split bodies 2A, 2B are joined to each other by bolts and nuts inserted through bolt holes 21.

[0012] As shown in Figs. 1 to 4, the tip of the arc portion 20 is fixed to the water pipe K by a separation prevention mechanism 6 that prevents the water pipe K from separating. The separation prevention mechanism 6 has a claw portion 60 that engages with the outer circumferential surface of the water pipe K, a claw housing portion 61 that houses the claw portion 60 and extends in the circumferential direction, and a pressing bolt 62 that presses the claw portion 60 toward the water pipe K. In this embodiment, the separation prevention mechanism 6 is integrally formed at the tip of the arc portion 20, and the claw housing portion 61 is integrally formed at the tip of the arc portion 20. The shape of the separation prevention mechanism 6 and the presence or absence of the mechanism can be changed as appropriate.

[0013] The upper member 2A constituting the outer box 2 has an arcuate portion 20 fixed to the water pipe K by the separation prevention mechanism 6, and an opening tubular portion 22 extending from the arcuate portion 20 to a first side UD1 in a first direction UD. The opening tubular portion 22 allows the insert 3 to be inserted, and when the insertion of the insert 3 is completed, the outer lid 7 is attached. The outer lid 7 is fastened to the flange of the opening tubular portion 22 with a bolt while pressing the insert 3 against the lower member 2B.

[0014] FIG. 6 shows a perspective view, a first side view, a second side view, and a bottom view of the insert 3. The valve body 32 is not shown in the perspective view. The first side view and the second side view show the state in which the valve body 32 is inserted. The pipe axis direction AD shows the direction when the insert 3 is inserted into the outer box 2 in the correct posture. The pipe axis direction AD shown in FIG. 6 is also the axial direction of the flow path hole 30 formed in the insert 3 and communicating with the water pipe K. As shown in FIG. 6, the insert 3 has a valve body 32 inside that can block or switch the flow path of the fluid (i.e., water) flowing in the water pipe K. The insert 3 of the first embodiment is a gate valve in which the internal valve body 32 can move to a position where it blocks the flow path or a position where it opens the flow path. The insert 3 has a valve body insertion hole 31, and the valve body 32 is configured to be inserted or removed along the insertion direction of the insert 3 (up-down direction UD) through the valve body insertion hole 31. When the valve body 32 is inserted into the inside of the insert body 3 through the valve body insertion hole 31, the valve body 32 blocks the flow path, and when the valve body 32 is moved in the direction of removing it (upward UD1), the valve body 32 opens the flow path (flow path hole 30).

[0015] As shown in FIG. 6, the insert 3 is formed in a shape in which an upper disk portion 33, a lower disk portion 34, and a rectangular parallelepiped portion 35 that connects the upper disk portion 33 and the lower disk portion 34 are combined as a whole. The rectangular parallelepiped portion 35 accommodates the valve body 32 and has a flow passage hole 30 formed therein. In FIG. 6, the location of the first packing 4 is shown by a dashed line without being shown. As shown in FIG. 3 and FIG. 6, the first packing 4 is annularly arranged around the upper disk portion 33 along the circumferential direction of the opening tube portion 22 and contacts the inner peripheral surface of the opening tube portion 22. The first packing 4 is arranged in a pair of arcs on the bottom of the lower disk portion 34 and contacts the bottom surface of the lower member 2B. The first packing 4 extends in the first direction UD on the side surface of the rectangular parallelepiped portion 35 and contacts the inner peripheral surface of the outer box 2. The first packing 4 extends upward from the pair of arcs on the bottom. As a result, the first space SP1 between the rectangular parallelepiped portion 35 and the bottom surface of the outer box 2 and the second space SP2 between the first packing 4 on the side of the rectangular parallelepiped portion 35 are connected to each other. Also, the third space SP3 on one side of the tube axis direction AD and the fourth space SP4 on the other side of the tube axis direction AD can be blocked. That is, the first space and the second space SP2 communicating therewith, the third space SP3, and the fourth space SP4 are blocked by the first packing 4. As a result, the flow path can be appropriately blocked by the valve body 32 (that is, the third space SP3 and the fourth space SP4 are blocked). Also, since the first space SP1 and the second space SP2 at the bottom of the outer box 2 are connected to each other, it is possible to check whether the sealing by the first packing 4 between the insert 3 and the outer box 2 is appropriate by draining water from the plug 80 at the bottom or side of the outer box 2.

[0016] As shown in Figs. 3 to 5, the opening tube portion 22 has a first rib 23 and a second rib 24. The first rib 23 is disposed on one side of the tube axis direction AD. The second rib 24 is disposed on the other side of the tube axis direction AD. The first rib 23 and the second rib 24 each protrude from the inner peripheral surface 22a of the opening tube portion 22 to the radially inner side RD1 of the opening tube portion 22 and extend in the circumferential direction CD1 of the opening tube portion 22. As shown in Fig. 4, when viewed from a line of sight parallel to the axis C1 of the opening tube portion 22, the first rib 23 and the second rib 24 may extend along the circumferential direction CD1 so that the opening angle with respect to the axis C1 is at least 45 degrees or more, more preferably 90 degrees or more. In this embodiment, when viewed from a line of sight parallel to the axis C1 of the opening tube portion 22, the first rib 23 and the second rib 24 extend along the circumferential direction CD1 so as to overlap the entire opening tube portion 22 in the range Ar1 obtained by projecting the arc portion 20 in the tube axis direction AD. When the water pipe K tries to separate in the detachment direction, the arc portion 20 is pulled in the detachment direction along the pipe axis direction AD, and the opening tubular portion 22 in the range Ar1 connected to the arc portion 20 is pulled in the pipe axis direction AD, and a force acts in a direction in which the opening tubular portion 22 deforms from a perfect circle to an ellipse when viewed from a line of sight parallel to the axis C1. If the first rib 23 and the second rib 24 extend in the circumferential direction CD1 on the inner peripheral surface of the opening tubular portion 22 in the range Ar1, the first rib 23 and the second rib 24 can suppress the deformation of the opening tubular portion 22. Furthermore, since the first rib 23 and the second rib 24 are provided on the inner surface 22a of the outer box 2 and are arranged in a space where the insert 3 is not placed and is not used for other equipment, it is possible to reduce the size of the outer box 2.

[0017] 3 and 5, the first rib 23 and the second rib 24 each have a circumferential extension portion 23a, 24a extending in the circumferential direction CD1 of the opening tube portion 22, and an axial extension portion 23b, 24b extending in the first direction UD from a portion of the circumferential extension portion 23a, 24a facing the insert 3. According to this configuration, the rigidity of the opening tube portion 22 against the separation force of the water pipe K is ensured by the circumferential extension portion 23a, 24a, but the rigidity of the first rib 23 and the second rib 24 can be improved by further providing the axial extension portion 23b, 24b on the circumferential extension portion 23a, 24a. Furthermore, since the axial extension portion 23b, 24b is provided at a portion facing the insert 3, the insert 3 can be supported by the axial extension portion 23b, 24b not at a point but at a line, and the movement of the insert 3 can be suppressed.

[0018] If the first rib 23 and the second rib 24 (particularly the circumferentially extending portions 23a, 24a which are portions protruding from the inner peripheral surface of the opening tube portion 22) are provided on the inner peripheral surface of the opening tube portion 22, they have the effect of suppressing the bending deformation of the opening tube portion 22. In order to maximize this effect, as shown in FIG. 3, it is preferable that the rib 23 and the second rib 24 are arranged at a position (shown by line L1 in FIG. 3) where they overlap in the first direction UD with the outer surface P1 of the first side UD1 (the side where the opening tube portion 22 opens) of the portion (the narrow portion of the arc portion) with the smallest outer diameter of the arc portion 20. When the water pipe K is about to be detached, the detachment force acts most on the portion of the arc portion 20 with the smallest outer diameter. In the opening tube portion 22, the portion that overlaps in the first direction UD with the outer surface of the portion with the smallest outer diameter of the arc portion 20 is pulled the most, and a large force acts on the overlapping portion, which is easily deformed. Therefore, it is preferable that the first rib 23 and the second rib 24 are disposed in the overlapping portion. In other words, if the height of the outer surface P1 of the portion of the arc portion 20 having the smallest outer diameter is the same as the height of the lower surfaces (surfaces on the second side UD2) of the first rib 23 and the second rib 24, or the lower surfaces (surfaces on the second side UD2) of the first rib 23 and the second rib 24 are lower than the outer surface P1, the first rib 23 and the second rib 24 will be disposed in a portion of the opening tubular portion 22 where the force acts strongly, and deformation of the outer box 2 including the opening tubular portion 22 can be suppressed.

[0019] 3, of the insert 3, the lower disk portion 34 and the rectangular parallelepiped portion 35 may interfere with the first rib 23 and the second rib 24 from the start of insertion into the outer box 2 to the end of insertion. As shown in FIG. 4, since the insert 3 is inserted between the inner peripheral surfaces of the first rib 23 and the second rib 24, the insert 3 needs to have a smaller inner diameter R1 than the inner peripheral surfaces of the first rib 23 and the second rib 24.

[0020] As shown in the bottom view of FIG. 6, the lower disk portion 34 of the insert 3 is smaller than the inner diameter R1 of the inner peripheral surfaces of the first rib 23 and the second rib 24 when viewed along the first direction UD. Therefore, when the insert 3 is completely inserted into the outer box 2, the lower disk portion 34 is located radially inside the inner peripheral surfaces of the first rib 23 and the second rib 24. On the other hand, when viewed along the first direction UD, the rectangular parallelepiped portion 35 of the insert 3 is larger than the inner diameter R1 of the inner peripheral surfaces of the first rib 23 and the second rib 24. Therefore, when the insert 3 is completely inserted into the outer box 2, the rectangular parallelepiped portion 35 is located radially outside the inner peripheral surfaces of the first rib 23 and the second rib 24. The inner diameter R1 of the first rib 23 and the second rib 24 is equal to or larger than the outer diameter of the cutter, i.e., the cutting portion K1, and may be smaller than the inner diameter of the inner peripheral surface 22a of the opening tube portion 22.

[0021] Fig. 7A is a diagram corresponding to Fig. 4 showing the positional relationship between the insert 3, the first rib 23, and the second rib 24 when inserted in the correct posture (first predetermined posture). Fig. 8 is a partially cutaway perspective view showing the insert 3, the outer box 2, and the water pipe K when inserted in the correct posture (first predetermined posture). As shown in Figs. 7A and 8, when the insert 3 is inserted from the first side UD1 (upper side) toward the second side UD2, the first rib 23 and the second rib 24 are disposed at positions where the rectangular parallelepiped portion 35 and the lower disk portion 34 of the insert 3 inserted in the correct posture are received in the gap between the first rib 23 and the second rib 24.

[0022] 7B is a diagram corresponding to FIG. 4 showing the positional relationship between the insert 3, the first rib 23, and the second rib 24 when the insert 3 is inserted in an incorrect position (second predetermined position) that is not the correct position. FIG. 9 is a partially broken perspective view showing the insert 3, the outer box 2, and the water pipe K when the insert 3 is inserted in an incorrect position (second predetermined position). As shown in FIG. 7B and FIG. 9, when the insert 3 is inserted from the first side UD1 (above) toward the second side UD2, the first rib 23 and the second rib 24 are arranged at a position where they come into contact with the rectangular parallelepiped portion 35 of the insert 3 inserted in an incorrect position. This makes it possible to prevent the insert 3 from being inserted in an incorrect position, and to prevent the first packing 4 of the incorrectly inserted insert 3 from coming into contact with the sharp cutting portion K1 of the water pipe K and being damaged.

[0023] If the insert body 3 is inserted in the correct posture, as shown in FIG. 3, the bottom of the insert body 3 (the first gasket 4 of the lower disk portion 34) will come into contact with the bottom surface of the outer box 2, and the rectangular parallelepiped portion 35 will be fixed in a state spaced apart in the first direction UD from the first rib 23 and the second rib 24. Furthermore, since the insert body 3 has a cantilever structure in which the upper part is fixed and the lower part is not fixed, a force will act on the lower part of the insert body 3 to vibrate in the pipe axis direction AD due to the pressure of the flow path when water is stopped, etc. However, since the rectangular parallelepiped portion 35 is sandwiched between the axial extension portion 23b of the first rib 23 and the axial extension portion 24b of the second rib 24, it is possible to prevent the insert body 3 from tilting.

[0024] <Modification> (1) In the first embodiment, the insert 3 is a gate valve having a valve body 32 therein capable of blocking the flow path, but is not limited thereto. FIG. 10 shows a modified insert 103, in which the lower member is removed and the upper member 102A and the outer box 102 are viewed from below (second side UD2). As shown in FIG. 10, the insert 103 may be a switching valve in which a valve body (not shown) can switch the flow path to either the first route RT1 or the second route RT2. A branch pipe 102K is connected to the outer box 102 in addition to the existing water pipe K. The first route RT1 or the second route RT2 is switched depending on the rotational posture of the valve body inside the insert 103. The insert 103 has an upper portion 133 that contacts the inner peripheral surface of the outer box 102 via the first packing 4, and a bottom portion 134 that contacts the bottom surface of the outer box 102 via the first packing 4. The insert 103 has a plurality of (four) side protrusions 135, and the side protrusions 135 contact the inner peripheral surface of the outer box 102 via the first packing 4. The side protrusions 135 are located radially outward of the opening tube portion 22 from the inner diameter R1 of the inner peripheral surfaces of the first rib 23 and the second rib 24. The bottom portion 134 is located radially inward of the opening tube portion 22 from the inner diameter R1 of the inner peripheral surfaces of the first rib 23 and the second rib 24. A third rib 25 is provided between the first rib 23 and the second rib 24. Two gaps are formed between the first rib 23 and the third rib 25, and two gaps are formed between the third rib 25 and the second rib 24. If the insert 103 is in the correct position, the side protrusions 135 can be inserted into the four gaps in total. If the insert 103 is in the wrong position, the side protrusions 135 come into contact with any of the ribs and cannot be inserted. There may be more than one lateral protrusion 135, for example, three or more. The third rib 25 may be omitted if the purpose is only to reinforce the opening tube portion 22. Also, there are cases in which the third rib 25 may be omitted even for the purpose of preventing erroneous insertion.

[0025] (2) As shown in Figures 4, 7A and 7B, the separation prevention mechanism 6 may be provided separately on the arc portion 20. That is, a flange may be provided on the tip of the arc portion 20, and a hook claw or a bolt of the separation prevention mechanism 6 may be hooked onto the flange.

[0026] (3) In the first embodiment, the first rib 23 and the second rib 24 are arranged to overlap the entire range Ar1 of the opening tubular portion 22 when viewed along the axis C1 of the opening tubular portion 22, but the first rib 23 and the second rib 24 may be arranged only in a part of the range Ar1. The reinforcing effect of the first rib 23 and the second rib 24 can be exerted.

[0027] (4) In the first embodiment, the axial extension portions 23b, 24b are provided, but the axial extension portions 23b, 24b can be omitted. If the circumferential extension portions 23a, 24a extend in the circumferential direction CD1 of the opening tubular portion 22, the reinforcing effect of the opening tubular portion 22 is exerted.

[0028] (5) In the first embodiment, one first rib 23 and one second rib 24 are provided, but a plurality of each rib may be disposed with gaps therebetween.

[0029] (6) In the above embodiment, the housing device is a valve device in which the insert 3 (103) has a valve body, but is not limited to this. The housing device may be configured so that an insert without a valve body can be inserted into the outer box.

[0030] As described above, although not particularly limited, as in the first embodiment or the modified example, the valve device 1 (housing device) includes an outer box 2 (102) that is attached to surround an existing water pipe K (fluid pipe), an insert body 3 (103) that is inserted from a first side UD1 to a second side UD2 in a first direction UD perpendicular to the pipe axis direction AD of the water pipe K and accommodated in the outer box 2 (102) and inserted into the cut portion K1 of the water pipe K, and a first packing 4 that seals between the outer box 2 (102) and the insert body 3 (103). ) has an arc portion 20 fixed to a water pipe K, and an opening tubular portion 22 extending from the arc portion 20 toward a first side UD1 in a first direction UD and into which an insert body 3 (103) can be inserted, the opening tubular portion 22 has a first rib 23 arranged on one side in the pipe axis direction AD and a second rib 24 arranged on the other side in the pipe axis direction AD, and the first rib 23 and the second rib 24 protrude from an inner surface 22a of the opening tubular portion 22 toward a radially inward side RD1 of the opening tubular portion 22 and extend in a circumferential direction CD1 of the opening tubular portion 22.

[0031] According to this configuration, the arc portion 20 of the outer box 2 is fixed to the fluid pipe (water pipe K), so that when a separation force acting on the outer box 2 (102) causes the fluid pipe to separate along the pipe axis direction AD, the arc portion 20 is pulled in the pipe axis direction AD, and the opening tube portion 22 is also pulled in the pipe axis direction AD. The inner peripheral surface 22a of the opening tube portion 22 is provided with a first rib 23 and a second rib 24 that protrude from the inner peripheral surface 22a to the radially inward RD1. Since the first rib 23 and the second rib 24 extend in the circumferential direction CD1 of the opening tube portion 22, it is possible to suppress or prevent the outer box 2 (102) including the opening tube portion 22 from deforming in the pipe axis direction AD.

[0032] Although not particularly limited, as in the first embodiment or the modified example, the first rib 23 and the second rib 24 may each be positioned at a position overlapping in the first direction UD with the outer surface P1 of the first side UD1 of the part of the arc portion 20 that has the smallest outer diameter. According to this configuration, the part of the outer box 2 (102) that is most pulled by the fluid pipe (water pipe K) is the part with the smallest outer diameter of the arc portion 20. The force acts most strongly on the part of the opening tubular portion 22 that overlaps in the first direction UD with the outer surface of the part with the smallest outer diameter of the arc portion 20. Since the first rib 23 and the second rib 24 are disposed in this part, deformation of the outer box 2 (102) can be further suppressed or prevented.

[0033] Although not particularly limited, as in the first embodiment or the modified example, when the insert body 3 (103) is fully inserted into the outer box 2 (102), when viewed along the first direction UD, it has a first portion (rectangular portion 35; lateral protrusion 135) that protrudes radially outward from the opening tube portion 22 beyond the inner diameter R1 of the inner surface 22a of the first rib 23 and the second rib 24, and a second portion (lower disk portion 34; bottom portion 134) that is radially inward RD1 from the inner diameter R1 of the inner surface 22a of the first rib 23 and the second rib 24, and the first rib 23 and the second rib 24 are positioned to receive the first portion of the insert body 3 (103) inserted in the correct posture into the gap between the first rib 23 and the second rib 24, and are also positioned to contact the first portion of the insert body 3 (103) inserted in the incorrect posture. According to this configuration, if the insert 3 (103) is in an incorrect position, it comes into contact with the first rib 23 and the second rib 24, making further insertion impossible, and if the insert 3 (103) is in a correct position, it is received in the gap between the first rib 23 and the second rib 24, making further insertion of the insert 3 (103) possible. Therefore, it is possible to avoid inserting the insert 3 (103) in an incorrect position. In particular, when the cut portion K1 of the water pipe K is sharp, it is possible to suppress or avoid the risk of the first packing 4 coming into contact with the cut portion K1.

[0034] Although not particularly limited, as in the first embodiment, the first rib 23 and the second rib 24 may each have a third portion (circumferential extending portion 23a, 24a) extending in the circumferential direction CD1 of the opening tubular portion 22, and a fourth portion (axially extending portion 23b, 24b) extending in the first direction UD from a portion of the third portion (circumferential end portion) facing the insert 3. According to this configuration, the insert 3 can be supported by a surface at the fourth portion (axially extending portions 23b, 24b), and movement of the insert 3 caused by fluid can be suppressed. Also, since the first rib 23 and the second rib 24 have not only the third portion (circumferentially extending portions 23a, 24a) but also the fourth portion (axially extending portions 23b, 24b), the rigidity of the first rib 23 and the second rib 24 can be improved.

[0035] Although not particularly limited, the insert 3 may have a valve body 32 capable of opening and closing the flow path as in the first embodiment. Also, as in a modified example of the first embodiment, the insert 103 may have a valve body capable of switching the flow path.

[0036] Although the embodiments of the present disclosure have been described above based on the drawings, the specific configurations should not be considered to be limited to these embodiments. The scope of the present disclosure is indicated not only by the description of the above-mentioned embodiments but also by the claims, and further includes all modifications within the meaning and scope equivalent to the claims.

[0037] The structures employed in the above-described embodiments may be employed in any other embodiment. The specific configurations of the components are not limited to the above-described embodiments, and may be modified in various ways without departing from the spirit of the present disclosure. [Explanation of symbols]

[0038] K...Water pipe (fluid pipe) 2. Outer box 20…Arc section 22...Opening cylinder part 23…First rib 23a... Circumferential extension part (3rd part) 23b...Axis extension part (4th part) 24…Second rib 24a... Circumferential extension part (3rd part) 24b...Axis extension part (4th part) 3…Inserted body 32...Valve body 34…Lower disc part (second part) 35...Rectangular section (first section) 4…First packing 102…Outer box 103...insertion body 134…Bottom (second part) 135...Lateral protrusion (first part) AD…Pipe axis direction UD: 1st direction UD1: Upward (first side) UD2…Downward (2nd side)

Claims

1. An outer box that is attached to surround an existing fluid pipe and is composed of a plurality of divided bodies; an insert that is inserted from a first side to a second side in a first direction perpendicular to a pipe axis direction of the fluid pipe and is housed in the outer box and is inserted into the cut portion of the fluid pipe; a first packing for sealing between the outer box and the insert; a second packing that is disposed on mating surfaces of the plurality of divided bodies and seals the spaces between the plurality of divided bodies; Equipped with the outer box has an arc portion fixed to the fluid pipe, and an opening tubular portion extending from the arc portion toward the first side in the first direction and into which the insert can be inserted, the opening tube portion has a first rib arranged on one side in the tube axis direction and a second rib arranged on the other side in the tube axis direction, A housing device, wherein the first rib and the second rib protrude radially inward from an inner peripheral surface of the cylindrical opening portion and extend in a circumferential direction of the cylindrical opening portion.

2. The housing device according to claim 1 , wherein the first rib and the second rib are each arranged at a position overlapping an outer surface of the first side of a portion of the arc portion that has a smallest outer diameter in the first direction.

3. When the insert is completely inserted into the outer box, the insert has a first portion that protrudes radially outward from the opening tubular portion beyond inner diameters of inner peripheral surfaces of the first rib and the second rib, and a second portion that is radially inward from inner diameters of inner peripheral surfaces of the first rib and the second rib, when viewed in the first direction, The housing device according to claim 1 or 2, wherein the first rib and the second rib are positioned in a position to receive the first portion of the insert body inserted in the correct posture into the gap between the first rib and the second rib, and are positioned in a position to contact the first portion of the insert body inserted in the incorrect posture.

4. A housing device as described in any one of claims 1 to 3, wherein the first rib and the second rib each have a third portion extending circumferentially around the opening tubular portion, and a fourth portion extending in the first direction from a portion of the third portion facing the insert.

5. The housing device according to any one of claims 1 to 4, wherein the insert has a valve body capable of switching or opening and closing a flow path.

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