Water stop mechanism for piping

Abstract

The present invention aims to prevent the split housings (30A, 30B) that hold the rubber ring (33) from coming off in the axial direction. In the present invention, a bolt (15) is inserted into a first bolt opening (13) of a first flange (11A) and a second bolt opening (14) of a second flange (12A), and the bolt (15) is fastened with a nut (16). A stop washer (22) of a bolt-side washer (21) and a stop washer (26) of a nut-side washer (25) are engaged with a side surface (32) of each split housing (30A, 30B).

Description

Technical Field

[0001] This disclosure relates to a piping sealing mechanism capable of properly sealing the joints of piping. Background Technology

[0002] In the past, in order to stop water or other fluids from leaking from the joints of pipes, a mechanism was used in which a rubber ring was placed on the outer periphery of the joint and the rubber ring was pushed from the outside by a split housing.

[0003] In addition, as a joint of the piping, a mechanism for sealing the joint of a pair of flanges is also considered.

[0004] Existing technical documents

[0005] Patent documents

[0006] Patent Document 1: Japanese Patent Application Publication No. 2018-136003

[0007] However, in the past, no simple structure has been developed to prevent the segmented housing from detaching along the axial direction in mechanisms having a rubber ring with a joint between a pair of flanges and a segmented housing that pushes the rubber ring from the outside. Summary of the Invention

[0008] The technical problem that the invention aims to solve

[0009] This disclosure was made with such considerations in mind, and its purpose is to provide a water-stopping mechanism for a piping system that prevents the segmented housing from detaching along the axial direction in a simple structure, in a mechanism having a rubber ring having a joint between a pair of flanges and a segmented housing that pushes the rubber ring from the outside.

[0010] Solutions for solving technical problems

[0011] This disclosure discloses a water-stopping mechanism for piping, comprising: a first piping having a first flange extending along an axial direction; and a second piping having a second flange engaging the first flange via a flange gasket and extending along an axial direction. The first flange has a plurality of first bolt openings, and the second flange has a plurality of second bolt openings. A bolt with a head is inserted from the first flange side into the first bolt openings and the second bolt openings, and is tightened by a nut located on the second flange side. A bolt-side washer is provided on the head side of the bolt. A nut-side washer is provided on the nut side of the bolt. A rubber ring is installed on the radial outer periphery of the junction of the first flange and the second flange, and the rubber ring is held by a housing. The housing includes a plurality of segmented housings disposed on the radial outer side of the rubber ring. Each segmented housing has: an outer peripheral surface that holds the outer periphery of the rubber ring from the radial outer side; and a pair of side surfaces disposed on both sides of the outer peripheral surface in the axial direction and holding the two side surfaces of the rubber ring in the axial direction. The bolt-side washer and the nut-side washer engage with the corresponding side surfaces of the segmented housings from the axial outer side.

[0012] In the water-stopping mechanism of the piping disclosed herein, both the bolt-side washer and the nut-side washer have a water-stopping washer located on the flange gasket side and a stop washer located on the opposite side of the flange gasket, and the stop washer engages with the side corresponding to the segmented housing.

[0013] In the water-stopping mechanism of the piping disclosed herein, the water-stopping washer of the bolt-side washer seals the first bolt opening of the first flange, and the water-stopping washer of the nut-side washer seals the second bolt opening of the second flange.

[0014] In the water-stopping mechanism of the piping disclosed herein, the water-stopping washer of the bolt-side washer has a water-stopping ring that seals the first bolt opening of the first flange, and the water-stopping ring of the nut-side washer has a water-stopping ring that seals the second bolt opening of the second flange.

[0015] Invention Effects

[0016] As described above, according to this disclosure, in a mechanism having a rubber ring with a joint between a pair of flanges and a segmented housing that pushes the rubber ring from the outside, it is possible to prevent the segmented housing from detaching in the axial direction with a simple structure. Attached Figure Description

[0017] Figure 1 This is a partial cross-sectional view showing the water-stopping mechanism of the piping according to the present disclosure, from... Figure 2 The view observed from the ABCD line.

[0018] Figure 2This is a diagram of the water-stopping mechanism of the piping of this disclosure as viewed from the axial direction.

[0019] Figure 3 This is a side cross-sectional view showing the washer on the nut side.

[0020] Figure 4 This is a perspective view showing the water-stopping mechanism of the piping of this disclosure, and is a view showing a partial section of the housing to expose the rubber gasket.

[0021] Figure 5 This is a diagram showing the water-stopping mechanism of the piping of this disclosure, and is an appearance view viewed from a direction orthogonal to the axial direction. Detailed Implementation

[0022] The water-stopping mechanism of the piping of this disclosure will now be described with reference to the accompanying drawings. Here, Figures 1 to 5 This is a diagram illustrating an embodiment of the water-stopping mechanism for piping according to the present disclosure.

[0023] like Figures 1 to 5 As shown, the water-stopping mechanism 10 of the piping includes: a first piping 11 having a first flange 11A and extending along the axial direction L; and a second piping 12 having a second flange 12A joined to the first flange 11A via a flange gasket 17 and extending along the axial direction L.

[0024] In this embodiment, the first flange 11A has a plurality of, for example, four, first bolt openings 13 along the circumferential direction, and the second flange 12A has a plurality of, for example, four, second bolt openings 14 along the circumferential direction (see reference). Figure 2 , Figure 4 and Figure 5 ).

[0025] Additionally, a bolt 15 with a head 15a is inserted into a first bolt opening 13 of a first flange 11A and a second bolt opening 14 of a second flange 12A, and the bolt 15 is tightened by a nut 16. In this way, the first flange 11A and the second flange 12A are fixed together by the bolt 15 and the nut 16.

[0026] In this case, the bolt 15 is inserted from the first flange 11A side, and the nut 16 is disposed on the second flange 12A side. Therefore, in this embodiment, the flange into which the bolt 15 is inserted is the first flange 11A, and the flange on the nut 16 side is the second flange 12A.

[0027] In addition, such as Figure 1As shown, the bolt 15 has a bolt shaft portion 15b and a head 15a located at one end of the bolt shaft portion 15b in the axial direction L. The head 15a of the bolt 15 is formed at one end of the bolt shaft portion 15b by fastening an additional nut having a structure substantially the same as that of the nut 16 to one end of the bolt shaft portion 15b. It should be noted that the head 15a of the bolt 15 may also be composed of a head that is adhered to one end of the bolt shaft portion 15b.

[0028] Furthermore, a bolt-side washer 21 is installed on the head 15a side of the bolt 15, and a nut-side washer 25 is installed on the nut 16 side of the bolt 15. Additionally, as... Figure 1 As shown, the bolt-side washer 21 is disposed between the head 15a and the first flange 11A, and the nut-side washer 25 is disposed between the nut 16 and the second flange 12A.

[0029] Furthermore, the bolt-side washer 21 has a water-stop washer 23 located on the flange gasket 17 side and a stop washer 22 located on the opposite side of the flange gasket 17.

[0030] Additionally, the nut-side washer 25 has a water-stop washer 27 located on the flange gasket 17 side and a stop washer 26 located on the opposite side of the flange gasket 17.

[0031] Here, the first flange 11A and the second flange 12A are joined together via flange gasket 17. Furthermore, a rubber ring 33 is installed on the outer periphery of the joint portion 40 formed between the first flange 11A and the second flange 12A, which is separated by the flange gasket 17, to seal the joint portion 40.

[0032] The rubber ring 33 is made of EPDM (ethylene propylene diene monomer rubber). It is obtained by forming a loop from a rope-like rubber strand. The two ends of the rope-like rubber strand are joined and glued together with an adhesive. The rubber ring 33 can be formed as a whole loop, or it can be formed by simply abutting the ends of the rope-like rubber strand together. It should be noted that the rubber ring 33 does not necessarily have to be made of EPDM; other rubber materials can also be used.

[0033] Additionally, the rubber ring 33 is held in the outer peripheral direction by a housing 30, which includes a plurality of, for example a pair of split housings 30A and 30B, located on the radially outer side of the rubber ring 33.

[0034] Here, as Figure 1 As shown, the rubber ring 33 has a first lip 33a that abuts against the outer periphery of the first flange 11A and a second lip 33b that abuts against the outer periphery of the second flange 12A in a cross section along the axial direction L. Furthermore, a space 33c is formed between the first lip 33a and the second lip 33b.

[0035] Furthermore, when fluids such as water leak from the joint 40 between the first flange 11A and the second flange 12A, the fluid intrudes into the space 33c of the rubber ring 33, causing the internal pressure of the space 33c to rise. In this case, as the internal pressure of the space 33c rises, the first lip 33a presses strongly against the outer periphery of the first flange 11A, and the second lip 33b presses strongly against the outer periphery of the second flange 12A. In this way, the rubber ring 33 can effectively stop the fluid leaking to the outside from the joint 40 between the first flange 11A and the second flange 12A.

[0036] Here, as described above, the housing 30 that holds the rubber ring 33 in the outer peripheral direction has a pair of segmented housings 30A and 30B that are divided into two along the circumferential direction. In this embodiment, each segmented housing 30A and 30B has: an outer peripheral surface 31 that holds the outer periphery of the rubber ring 33 from the radial direction outward; and a pair of side surfaces 32, 32, provided on both sides of the outer peripheral surface 31 in the axial direction L, holding the two side surfaces of the rubber ring 33 in the axial direction L (refer to...). Figure 4 ).

[0037] In addition, as described above, the bolt-side washer 21 provided on the head 15a side of the bolt 15 has a water-stop washer 23 on the flange gasket 17 side and a stop washer 22 on the opposite side of the flange gasket 17, wherein the stop washer 22 engages with the side surface 32 corresponding to the segmented housings 30A and 30B.

[0038] In addition, as described above, the nut-side washer 25 provided on the nut 16 side of the bolt 15 has a water-stop washer 27 on the flange gasket 17 side and a stop washer 26 on the opposite side of the flange gasket 17, wherein the stop washer 26 engages with the side 32 corresponding to the partition housings 30A and 30B.

[0039] In this way, the stop washer 22 of the bolt-side washer 21 and the stop washer 26 of the nut-side washer 25 engage with the corresponding side surfaces 32 of the segmented housings 30A and 30B, thereby keeping the segmented housings 30A and 30B of the rubber ring 33 fixed relative to the first flange 11A and the second flange 12A along the axial direction L. Therefore, the rubber ring 33 located on the outer periphery of the joint 40 between the first flange 11A and the second flange 12A, and the segmented housings 30A and 30B that hold the rubber ring 33, will not move from the joint 40 along the axial direction L or detach from the joint 40.

[0040] Therefore, the joint 40 between the first flange 11A and the second flange 12A can be reliably sealed by the rubber ring 33.

[0041] Here, the bolt-side washer 21 and the nut-side washer 25 have roughly the same structure. Specifically, through... Figure 3The nut-side washer 25 is further described. The nut-side washer 25 has a stop washer 26 that engages with the side 32 of the dividing housings 30A and 30B, and a water-stop washer 27 located on the flange gasket 17 side. The water-stop washer 27 includes a water-stop ring 28 that extends into the second bolt opening 14 of the second flange 12A to seal the second bolt opening 14.

[0042] In this embodiment, both the stop washer 26 and the water-stop washer 27 of the nut-side washer 25 are made of SUS. The stop washer 26 engages with the side surface 32 of the dividing housing 30A and 30B. Therefore, the shape of the stop washer 26 is larger than that of the water-stop washer 27.

[0043] Furthermore, the water-stop washer 27 is installed close to the second bolt opening 14 side of the second flange 12A without engaging with the side 32 of the split housings 30A and 30B. This allows the water-stop ring 28 provided on the water-stop washer 27 to effectively enter the second bolt opening 14 of the second flange 12A.

[0044] It should be noted that the water-stop washer 27 is made of SUS as described above, and the water-stop ring 28 is made of EPDM. It should also be noted that the water-stop ring 28 does not necessarily have to be made of EPDM; other rubber materials can also be used.

[0045] In addition, the bolt-side washer 21 has a structure that is substantially the same as that of the nut-side washer 25.

[0046] Next, the materials of each structural component are described. The first pipe 11, the first flange 11A, the second pipe 12, and the second flange 12A are all made of steel.

[0047] In addition, an inner surface coating film 11a is provided on the inner surface of the first pipe 11, which extends from the first pipe 11 to the middle of the inner surface of the first flange 11A.

[0048] In addition, an inner surface coating film 12a is provided on the inner surface of the second pipe 12, which extends from the second pipe 12 to the middle of the inner surface of the second flange 12A.

[0049] Furthermore, the flange gasket 17, rubber ring 33, and water-stop rings 24 and 28 are all made of EPDM. However, as mentioned above, the flange gasket 17, rubber ring 33, and water-stop rings 24 and 28 do not necessarily have to be made of EPDM; other rubber materials can also be used. Additionally, the flange gasket 17 is not limited to rubber materials containing EPDM; paper gaskets such as asbestos gaskets can also be used.

[0050] Furthermore, the segmented shells 30A and 30B constituting the shell 30 are both made of cast iron. In addition, the stop washer 22 and water-stop washer 23 of the bolt-side washer 21, and the stop washer 26 and water-stop washer 27 of the nut-side washer 25 are all made of SUS.

[0051] like Figure 2 As shown, both segmented housings 30A and 30B have protrusions 30A1 and 30B1 at both ends in the circumferential direction, protruding outward in the radial direction. The protrusions 30A1 and 30B1 of the segmented housings 30A and 30B are brought into contact with each other, and connecting bolts 35 are inserted into these protrusions 30A1 and 30B1. Next, connecting nuts 36 are used to tighten the connecting bolts 35 inserted into the protrusions 30A1 and 30B1, thereby fixing the protrusions 30A1 and 30B1 and assembling the pair of segmented housings 30A and 30B. Thus, a housing 30 composed of a pair of segmented housings 30A and 30B is obtained.

[0052] In this case, the connecting bolts 35 and connecting nuts 36 that assemble a pair of split housings 30A and 30B are both made of SUS.

[0053] Next, the function of this embodiment, which is constructed in this way, will be explained.

[0054] First, a first conduit 11 having a first flange 11A and a second conduit 12 having a second flange 12A are configured such that the first flange 11A and the second flange 12A face each other. In this case, a flange gasket 17 is sandwiched between the first flange 11A and the second flange 12A. In addition, an existing flange gasket is used for the flange gasket 17.

[0055] Next, the rope-like rubber ring 33 is extended to the outer periphery of the joint 40 between the first flange 11A and the second flange 12A, and a pair of segmented housings 30A and 30B for holding the rubber ring 33 are arranged on the outer side of the rubber ring 33 in the radial direction.

[0056] Next, the connecting bolt 35 is inserted into the protrusions 30A1 and 30B1 of a pair of split housings 30A and 30B, and the connecting bolt 35 is tightened by the connecting nut 36.

[0057] Thus, the protrusion 30A1 of the segmented housing 30A and the protrusion 30B1 of the segmented housing 30B are fixed together. This allows a pair of segmented housings 30A and 30B to be assembled to form housing 30. Furthermore, the housing 30 formed by assembling a pair of segmented housings 30A and 30B can retain the rubber ring 33.

[0058] In this case, the outer periphery of the rubber ring 33 can be held from the radial direction outward by dividing the outer peripheral surfaces 31 of the housings 30A and 30B. In addition, the two sides of the rubber ring 33 along the axial direction L can be held by dividing a pair of side surfaces 32, 32 of the housings 30A and 30B.

[0059] Next, the bolt 15 with head 15a is inserted from the first flange 11A side into the first bolt opening 13 of the first flange 11A and the second bolt opening 14 of the second flange 12A.

[0060] Next, the nut 16 is installed on the second flange 12B side of the bolt 15, and the nut 16 is tightened relative to the bolt 15. In this way, the first flange 11A and the second flange 12A can be firmly fixed.

[0061] In this case, a bolt-side washer 21 is pre-inserted into the head 15a side of the bolt 15, and the bolt 15 is tightened with a nut 16. This causes the stop washer 22 of the bolt-side washer 21 to engage with the corresponding side 32 of the segmented housings 30A and 30B. Simultaneously, the water-stop washer 23 approaches the first bolt opening 13 side of the first flange 11A without engaging with the side 32 of the segmented housings 30A and 30B. Thus, the water-stop ring 24 provided on the water-stop washer 23 extends into the first bolt opening 13 of the first flange 11A, thereby enabling reliable sealing within the first bolt opening 13 through the water-stop ring 24.

[0062] Similarly, a nut-side washer 25 is pre-inserted on the nut 16 side of bolt 15. By tightening bolt 15 with nut 16, the stop washer 26 of nut-side washer 25 engages with the corresponding side 32 of the segmented housings 30A and 30B. Simultaneously, the water-stop washer 27 approaches the second bolt opening 14 side of the second flange 12A without engaging with the side 32 of the segmented housings 30A and 30B. Thus, the water-stop ring 28 provided on the water-stop washer 27 extends into the second bolt opening 14 of the second flange 12A, thereby enabling reliable sealing within the second bolt opening through the water-stop ring 28.

[0063] According to this embodiment, the bolt 15 is inserted into the first bolt opening 13 of the first flange 11A and the second bolt opening 14 of the second flange 12A, and the bolt 15 is tightened by the nut 16. As a result, the stop washer 22 of the bolt-side washer 21 engages with one side 32 of the partition housings 30A and 30B from the outside of the axial direction L, and the stop washer 26 of the nut-side washer 25 engages with the other side 32 of the partition housings 30A and 30B from the outside of the axial direction L. This allows the stop washer 22 and the stop washer 26 to engage with the side 32 of the partition housings 30A and 30B from the outside of the axial direction L. Therefore, the rubber ring 33 located on the outer periphery of the joint 40 between the first flange 11A and the second flange 12A, and the partition housings 30A and 30B holding the rubber ring 33, will not move from the joint 40 along the axial direction L or disengage from the joint 40 along the axial direction L.

[0064] Therefore, the joint 40 between the first flange 11A and the second flange 12A can be reliably sealed by the rubber ring 33.

[0065] Furthermore, the water-stop washer 23 of the bolt-side washer 21 on the first flange 11A side has a smaller profile than the stop washer 22. Therefore, the water-stop washer 23 approaches the first bolt opening 13 side of the first flange 11A without engaging with the side 32 of the dividing housings 30A and 30B. As a result, the water-stop ring 24 provided on the water-stop washer 23 effectively enters the first bolt opening 13 of the first flange 11A, and the first bolt opening 13 can be sealed by the water-stop ring 24.

[0066] Furthermore, the water-stop washer 27 of the nut-side washer 25 on the second flange 12A side has a smaller profile than the stop washer 26. Therefore, the water-stop washer 27 approaches the second bolt opening 14 side of the second flange 12A without engaging with the side 32 of the dividing housings 30A and 30B. This allows the water-stop ring 28 provided on the water-stop washer 27 to effectively enter the second bolt opening 14 of the second flange 12A, enabling the second bolt opening 14 to be sealed by the water-stop ring 28.

[0067] By using the bolt-side washer 21 and nut-side washer 2 on the bolt 15, the functions of preventing the segmented housings 30A and 30B of the retaining rubber ring 33 from moving or disengaging along the axial direction L can be achieved simultaneously, as well as sealing the first bolt opening 13 and the second bolt opening 14.

[0068] Therefore, since the partitioned housings 30A and 30B are prevented from moving or detaching along the axial direction L, and since the first bolt opening 13 and the second bolt opening 14 are sealed, there is no need to set up separate mechanisms, thereby simplifying the structure and the setup operation.

[0069] Furthermore, the rubber ring 33 has a first lip 33a that abuts against the outer periphery of the first flange 11A and a second lip 33b that abuts against the outer periphery of the second flange 12A, and a space 33c is formed between the first lip 33a and the second lip 33b. Therefore, when fluid such as water leaks from the joint 40 between the first flange 11A and the second flange 12A, the fluid flows within the space 33c of the rubber ring 33, causing the internal pressure of the space 33c to rise. As the internal pressure of the space 33c rises, the first lip 33a and the second lip 33b can strongly press against the outer periphery of the first flange 11A and the outer periphery of the second flange 12A. Thus, the joint 40 between the first flange 11A and the second flange 12A can be reliably sealed by the rubber ring 33.

[0070] Explanation of reference numerals in the attached figures

[0071] 10. Water-stopping mechanism for piping

[0072] 11 First Piping

[0073] 11A First Flange

[0074] 11a Inner surface coating film

[0075] 12 Second piping

[0076] 12A Second Flange

[0077] 12a Inner surface coating film

[0078] 13 First bolt opening

[0079] 14 Second bolt opening

[0080] 15 bolts

[0081] 15a Head

[0082] 15b Bolt shaft

[0083] 16 nuts

[0084] 17 Flange gasket

[0085] 21 Bolt side washer

[0086] 22 Stopping component washer

[0087] 23 Water-stop washers

[0088] 24 Water-stop ring

[0089] 25 Nut Side Washer

[0090] 26 Stopping component washer

[0091] 27 Water-stopping gasket

[0092] 28 Water-stop ring

[0093] 30. Housing

[0094] 30A and 30B split shells

[0095] 31 Outer Peripheral Surface

[0096] 32 Side View

[0097] 33 Rubber Ring

[0098] 33a First lip

[0099] 33b Second lip

[0100] 33c space

[0101] 35 Connecting bolts

[0102] 36 Connecting Nut

[0103] 40 Joint

Claims

1. A water-stopping mechanism for piping, wherein, include: The first conduit has a first flange and extends along the axial direction; and The second conduit has a second flange that engages with the first flange via a flange gasket and extends along the axial direction. The first flange has multiple first bolt openings, and the second flange has multiple second bolt openings. A headed bolt is inserted from the first flange side into the first bolt opening and the second bolt opening, and is tightened by a nut located on the second flange side. A bolt-side washer is provided on the head side of the bolt, and a nut-side washer is provided on the nut side of the bolt. A rubber ring is mounted on the radially outer periphery of the junction between the first flange and the second flange, and the rubber ring is held by a housing, the housing comprising a plurality of segmented housings disposed radially outside the rubber ring. Each segmented housing has: an outer peripheral surface that holds the outer periphery of the rubber ring from the radial direction; a pair of side surfaces located on both sides of the outer peripheral surface in the axial direction, holding the two side surfaces of the rubber ring in the axial direction; and a bolt-side washer and a nut-side washer engaging with the corresponding side surfaces of the segmented housing from the axial direction.

2. The water-stopping mechanism for piping according to claim 1, wherein, Both the bolt-side washer and the nut-side washer have a water-stop washer located on the flange gasket side and a stop washer located on the opposite side of the flange gasket. The stop washer engages with the corresponding side of the segmented housing.

3. The water-stopping mechanism for piping according to claim 2, wherein, The water-stop washer of the bolt-side washer seals the first bolt opening of the first flange, and the water-stop washer of the nut-side washer seals the second bolt opening of the second flange.

4. The water-stopping mechanism for piping according to claim 3, wherein, The bolt-side washer has a water-stop ring that seals the first bolt opening of the first flange, and the nut-side washer has a water-stop ring that seals the second bolt opening of the second flange.

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