JP2023164884A - Drainage connection structure and drainage joint - Google Patents

Abstract

To provide a drainage connection structure that enables a flexible pipe to be directly fitted to a drainage joint.SOLUTION: A drainage joint 1 includes: a joint body 3 that allows drainage discharged from a connected device to pass therethrough and allows backflow water which tends to flow in an opposite direction to the drainage to flow out to the outside; and a thread part 42, to which a cap nut of a flexible pipe is connected, in a downstream side end part on the basis of a flow of the drainage.SELECTED DRAWING: Figure 3

Description

The present invention relates to a drainage connection structure through which wastewater discharged from connected equipment passes, and a drainage joint that constitutes this drainage connection structure.

For example, there is a drainage joint described in Patent Document 1 (referred to as a "connection device" in the document). This drainage joint consists of a joint body configured as an indirect drainage joint, a cover body attached to the joint body to prevent foreign matter from entering the joint body, and a device attached to the joint body and to be connected. and a tubular member that is bonded to the joint body and indirectly connected to the device via the joint.

A drain pipe is connected to the drain section, which is the end of the joint body opposite to the device. Although it is not clear from the description in Patent Document 1, the drain pipe is connected to the drain section by adhesive.

Here, in order to increase the degree of freedom of connection in response to the expansion and contraction of the piping, flexible pipes (commonly known as "flexible pipes" or "flexible pipes") are used as part of the drain pipes. A cap nut is provided at the end of the flexible tube used for connection, and the connection is made by screwing this cap nut into the thread of the object to be connected. However, with the drainage joint of Patent Document 1, it was not possible to directly attach the flexible pipe to the drainage part.

JP2019-90437A

Therefore, an object of the present invention is to provide a drainage connection structure constructed by directly attaching a flexible pipe, and a drainage joint constituting this drainage connection structure.

The present invention includes a device that generates drainage, a drainage joint that receives the drainage discharged from the device, and a flexible pipe connected to the downstream side of the drainage joint, and the drainage joint is configured to receive the drainage from the device. The joint body includes a joint body that allows the drainage water to pass through and allows backflow water that attempts to flow in a direction opposite to the drainage water to flow out to the outside, and an adapter portion that is detachable from the joint body, and the joint body A pipe connection part to which a pipe can be connected by internal fitting is provided at the downstream end with reference to the flow of drainage, and the adapter part is removably attached to the pipe connection part, and the downstream end of the adapter part is removably attached to the pipe connection part. The part is provided with a threaded part to which a cap nut of the flexible pipe is connected, and the pipe, which is a drain pipe through which the waste water passes, is directly connected to the pipe connection part when the adapter part is not attached. The drain connection structure is such that the pipe, which is the drain pipe, can be connected via the flexible pipe attached to the upstream side of the pipe and the adapter part with the adapter part attached.

The present invention also provides a drainage joint that constitutes the drainage connection structure.

According to these configurations, since the drainage connection structure has a threaded portion at the downstream end of the joint body, the cap nut of the flexible pipe can be connected to this threaded portion.

Further, a cap nut of the flexible pipe can be connected to the adapter part attached to the pipe connection part. Moreover, a pipe can also be connected to the piping connection part from which the adapter part has been removed.

In the drainage connection structure of the present invention, a cap nut of a flexible pipe can be connected to a threaded portion provided at a downstream end of a joint body. Therefore, the flexible tube can be directly attached.

FIG. 1 is a perspective view of a drainage joint according to an embodiment of the present invention. It is a figure showing the usage state of the same drainage joint. It is an exploded perspective view of the same drainage joint. FIG. 3 is a longitudinal cross-sectional view passing through the radial center of the drainage joint. It is a bottom view of the joint body in the same drainage joint. (a) is a front view showing the adapter part of the drain joint. (b) is a VI-VI sectional view shown in (a).

A drainage joint 1 according to an embodiment of the present invention will be described. Note that the expression "vertical direction" below corresponds to the vertical direction in the usage state of the drainage joint 1 (see FIG. 2). In the drainage joint 1, drainage flows from above to below. That is, the upstream side with respect to the flow of drainage is the upper side of the drainage joint 1, and the downstream side with respect to the flow of drainage is the lower side of the drainage joint 1.

The drainage joint 1 according to the present embodiment is a type of joint called an "indirect drainage joint." As shown in FIG. 1, the drainage joint 1 includes an equipment side connection part 2, a joint body 3, and an adapter part (drainage side connection part) 4. For example, as shown in FIG. 2, the drainage joint 1 has an upper side connected to a drainage section H1 of a device H that generates drainage or to a pipe connected to this drainage section H1 (hereinafter collectively referred to as "equipment, etc."). The lower side is connected to a drain pipe P, which is a pipe that communicates with drainage equipment. At least the joint body 3 of the drainage joint 1 is arranged such that the flow path formed inside (the flow path corresponding to the drainage area S1 and the water leakage area S2 shown in FIGS. 4 and 5) faces in the vertical direction. . Although the joint body 3 is basically oriented vertically, it may be arranged at an angle depending on the case. Equipment H corresponds to various equipment that generate waste water. For example, a latent heat recovery water heater is an example of equipment or equipment that requires sanitary considerations and is not preferable to be directly connected to drainage equipment.

The device-side connecting portion 2 is configured such that the upper side is connected to the device, etc., the lower side is connected to the joint body 3, and drainage water can flow through the inside. The device-side connection portion 2 includes a cylindrical device-side water passage portion 21 and a device-side attachment portion 22 that can be engaged with the joint body 3 . The device-side water passage section 21 of this embodiment includes a plurality of ribs 211 that protrude radially outward from the outer peripheral surface.

The device-side water passage portion 21 includes a device-side engaging portion 212 that is provided on the upper side and engages with the device, etc., and a device-side inner water passage portion that is provided on the lower side and whose lower end portion is inserted into the inside of the joint body 3. An insertion part 213. The device-side engaging portion 212 is a cylindrical portion in which a threaded portion 212a having a female thread is formed on the inner circumferential surface, and can be screwed into a male thread provided on a device or the like.

The device-side mounting portion 22 includes a substantially cylindrical mounting base 221 and a device-side engaging claw 222 that projects radially inward from the inner circumferential surface of the lower end of the mounting base 221 . A plurality of device-side engaging claws 222 are provided, and in this embodiment, one pair is provided approximately 180 degrees apart in the circumferential direction of the mounting base 221. Furthermore, a plurality of planes are formed on the outer peripheral surface of the mounting base 221. The outer peripheral surface of the mounting base 221 of this embodiment is formed into a polygonal shape in cross section. A tool such as a spanner can be engaged with the outer peripheral surface of the mounting base 221.

The joint body 3 has a cylindrical appearance, and has an opening 332a formed in a part of the outer wall that partitions the inside and outside of the joint body 3. Further, the joint body 3 is configured such that waste water flows into the upper end and flows out from the lower end. As shown in FIG. 3, the joint body 3 includes an equipment side fitting part 31 formed at the upper end and capable of fitting with the equipment side connection part 2, and a drainage side formed at the lower end part and capable of fitting with the adapter part 4. It includes a fitting part 32 and an indirect drainage part 33 that connects the device side fitting part 31 and the drainage side fitting part 32. With this configuration, the joint body 3 allows drainage discharged from connected equipment, etc. (drainage flowing downward in routes R1 and R2 shown in FIG. 4) to pass therethrough, and also prevents the drainage from flowing in the opposite direction. The backflow water (backflow water that attempts to flow upward in path R3 shown in FIG. 4) is caused to flow out from the opening 332a.

The device side fitting part 31 is a part that can be engaged with the device side connecting part 2. Further, the device-side fitting portion 31 is a cylindrical portion whose outer diameter is smaller than the inner diameter of the mounting base 221 in the device-side connection portion 2 and larger than the inner diameter of the device-side engaging claw 222. That is, the device-side fitting portion 31 is a portion into which the mounting base 221 can be externally fitted, and the device-side engaging claw 222 of the device-side connecting portion 2 is engaged when the mounting base 221 is externally fitted. Specifically, the device-side fitting portion 31 includes a device-side groove portion 311 that can be engaged with the device-side engaging claw 222, and a groove that guides the device-side engaging claw 222 from the upper end to the device-side groove portion 311. A side guide portion 312 is provided. The device side groove portion 311 of this embodiment is provided over one circumference in the circumferential direction of the device side fitting portion 31. Further, the device-side guide portion 312 is a recess formed in the device-side connection portion 2 into which the device-side engaging claw 222 can fit.

The drainage side fitting part 32 is a part that can be engaged with the adapter part 4. Moreover, the drainage side fitting part 32 is a cylindrical part whose outer diameter is smaller than the inner diameter of the fitting cylinder part 411 in the adapter part 4 . That is, the drainage side fitting part 32 is a part to which the fitting cylinder part 411 can be fitted externally, and the drainage side engaging claw 412 of the adapter part 4 is locked when the fitting cylinder part 411 is externally fitted. Specifically, the drainage side fitting part 32 includes a drainage side groove part 321 that can be engaged with the drainage side engaging claw 412, and a drainage groove part 321 that is a groove that guides the drainage side engaging claw 412 from the lower end to the drainage side groove part 321. A side guide portion 322. The length of the drainage groove portion 321 in the present embodiment in the circumferential direction is approximately equal to the length of the drainage side engaging claw 412 in the circumferential direction. Further, a plurality of drain side groove portions 321 are provided in this embodiment, and in this embodiment, they are provided at two locations approximately 180 degrees apart in the circumferential direction of the drain side fitting portion 32. Further, the drain side guide portion 322 is a recess into which a drain side engaging claw 412 formed on the adapter portion 4 can fit.

The indirect drainage part 33 is a cylindrical part that connects the device side fitting part 31 and the drainage side fitting part 32. Specifically, the indirect drainage section 33 includes a drainage wall section 331 that is an outer wall that partitions the inside and outside of the joint body 3, and a water leakage wall section 332 that is an outside wall of the joint body 3 and has an opening 332a that communicates between the inside and outside. , is provided.

The drainage wall portion 331 is a wall that partitions the inside and outside of the joint body 3 so that water cannot pass therethrough. That is, the drainage wall portion 331 is a wall body in which no opening is formed. The water leakage wall portion 332 is a wall of the joint body 3, and has an opening 332a through which water can pass through which communicates the inside and outside of the joint body 3. The opening 332a of this embodiment is formed by a plurality of slits extending in the circumferential direction (lateral direction). Note that the shape of each opening 332a is not limited to the shape of this embodiment, and various shapes that do not inhibit discharge of backflow water can be adopted.

A partition wall 34 is provided inside the joint body 3. In this embodiment, it is formed integrally with the outer peripheral portion of the joint body 3 (the portion that appears in the external appearance in FIG. 3) (see FIG. 5). However, the partition wall 34 may be formed separately from the outer peripheral portion, and may be integrated by fitting or the like. The partition wall 34 is a wall whose one end and the other end in the radial direction are connected to the drainage wall 331 and partitions between the drainage wall 331 and the water leakage wall 332. Further, the area defined by the drainage wall 331 and the partition wall 34 is a drainage area S1 in which waste water moves from the upper side to the lower side, and the area defined by the water leakage wall 332 and the partition wall 34 is a drainage area S1 where the drainage water moves from the upper side to the lower side. This is a water leakage region S2 where backflow water that flows backward from the side toward the top leaks to the outside of the joint body 3 from the opening 332a. Further, the partition wall 34 partitions the drainage wall portion 331 and the water leakage wall portion 332 so that the drainage water does not pass from the drainage region S1 to the water leakage region S2.

As shown in FIG. 5, the partition wall 34 includes a flat wall portion 341 that is a flat wall extending along the radial direction of the joint body 3, and a curved wall portion 342 that is curved so as to extend along the circumferential direction. Equipped with. A communication port 343 is formed in the curved wall portion 342 to extend in the vertical direction, communicating the drainage region S1 and the water leakage region S2.

The adapter part 4 is connected to the joint body 3 at the upper end and to the drain pipe P at the lower end, and is configured to allow drainage to flow through the inside. Specifically, as shown in FIGS. 6(a) and 6(b), the adapter part 4 has a drain side mounting part 41 provided at the upper end and engaged with the other end of the joint body 3, and a drain side mounting part 41 provided at the lower end. It includes a pipe engaging part 42 that engages with the flexible pipe F connected to the drain pipe P, and a connecting part 43 that connects the drain side attachment part 41 and the pipe engaging part 42.

As shown in FIG. 6(b), the drain side attachment portion 41 is a cylindrical portion that engages with the lower end portion of the joint body 3. As shown in FIG. Specifically, the drainage side attachment part 41 includes a cylindrical fitting cylinder part 411 and a drainage side engaging claw 412 that protrudes radially inward from the inner circumferential surface of the upper end of the fitting cylinder part 411. The drainage side attachment portion 41 of this embodiment is externally fitted onto the lower end portion of the joint body 3 and engaged with the joint body 3 . That is, the fitting cylinder part 411 of this embodiment can be externally fitted into the drainage side fitting part 32 of the joint main body 3. Further, a plurality of drainage-side engaging claws 412 are provided, and in this embodiment, one pair is provided approximately 180 degrees apart in the circumferential direction of the fitting cylinder portion 411. Furthermore, a plurality of flat surfaces are formed on the outer circumferential surface of the fitting cylinder portion 411. The outer peripheral surface of the fitting cylinder part 411 of this embodiment is formed in a polygonal shape (more specifically, a hexagonal shape that is similar to a nut) in cross section, and this outer peripheral surface connects the cap nut F1. This is a tool engaging part that engages a tool such as a spanner used when doing this.

The pipe engaging portion 42 engages with a pipe or the like to connect the adapter portion 4 and the pipe or the like. Specifically, the pipe engaging portion 42 has a cylindrical shape, has a portion on its outer peripheral surface that can be engaged with a pipe, etc., and is configured to allow water to pass through the inside of the pipe engaging portion 42. The pipe engaging portion 42 of this embodiment includes a threaded portion 42a having a male thread on the outer peripheral surface. That is, the pipe engaging portion 42 of this embodiment is configured such that its outer peripheral surface is threadedly engaged with a pipe or the like, and water can pass through the inside. The flexible pipe F is connected to the threaded portion 42a by being screwed into the cap nut F1.

The inner bottom surface 431 of the connecting portion 43 is an inclined surface that becomes lower from the radially outer position toward the radially inner position when the drainage joint 1 is in use. Since the inner bottom surface 431 of the adapter part 4 has the inclined surface in this way, the drainage water flows along the inclined surface and can be drained without any stagnation in the adapter part 4. In this embodiment, the entire inner bottom surface 431 is an inclined surface, but the present invention is not limited to this, and for example, only the region of the inner bottom surface 431 that is hit by drainage may be made into an inclined surface.

Next, the movement of water inside the drain joint 1 will be explained using FIG. 4. Drainage discharged from equipment, etc. moves (falls) due to gravity and moves to the joint body 3 through the equipment side connection part 2. The drainage water that has moved to the joint body 3 moves (falls) to the adapter part 4 through the drainage area S1. Specifically, among the drainage that has moved to the joint body 3, the drainage that is closer to the drainage wall 331 continues to move according to gravity (route R1), and the drainage that is closer to the leakage wall 332 is inclined at the partition wall 34. It is guided to a position close to the drainage wall part 331 by the upper end portion formed in this way, and moves in the drainage area S1 according to gravity (route R2). The wastewater that has moved from the drainage area S1 to the adapter section 4 moves inside the adapter section 4 and is discharged toward the drain pipe P.

Backflow water that attempts to flow back toward the equipment from the drain pipe P passes through the adapter section 4 and moves to the joint body 3. The backflow water that has flowed back to the water leakage wall portion 332 leaks to the outside of the joint body 3 from the opening 332a (route R3). Therefore, backflow water can be prevented from reaching devices and the like. Specifically, water flow resistance is smaller in the water leakage region S2 than in the drainage region S1 because the opening 332a is present. Therefore, the backflow water flows to S2 instead of S1, and leaks out of the joint body 3 from the opening 332a. Since the backflow water leaks to the outside of the joint body 3, it is possible to prevent the equipment H from stopping or breaking down due to the backflow of wastewater.

Next, a method for constructing a drainage structure using the drainage joint 1 of this embodiment will be described. In this method, a drainage joint 1 is connected to a drainage section H1 of a device H that generates drainage, and then a cap nut F1 of a flexible pipe F is connected to the downstream end of the drainage joint 1. The steps will be explained below in order.

As shown in FIG. 4, the drainage joint 1 is assembled by fitting the device-side connection part 2 to the upper end of the joint body 3 and fitting the adapter part 4 to the lower end. Specifically, the device-side connecting portion 2 is fitted into the device-side fitting portion 31, and the adapter portion 4 is fitted into the drainage-side fitting portion 32. Incidentally, since the drain pipe P (resin pipe, etc.) may be directly attached to the joint body 3, the adapter portion 4 can be attached to the joint body 3 at the site where the equipment or the like is installed. In addition, when the drain pipe P is directly attached to the joint body 3, the adapter part 4 is not attached to the joint body 3.

When fitting the device-side connecting portion 2 into the joint body 3, the device-side insertion portion 213 is inserted into the device-side fitting portion 31, and the mounting base portion 221 is externally fitted into the device-side fitting portion 31. That is, the outer wall of the device-side fitting portion 31 is inserted into the space defined by the mounting base 221 and the device-side insertion portion 213. Specifically, while guiding the device-side engaging claw 222 with the device-side guide portion 312 until the device-side engaging claw 222 fits into the device-side groove portion 311, the device-side connecting portion 2 is moved downward from the upper side of the joint body 3. move it to the side. When the device-side engaging claw 222 fits into the device-side groove portion 311, the device-side engaging claw 222 and the device-side groove portion 311 engage, and upward movement of the device-side connecting portion 2 is restricted. Further, since the device side groove portion 311 is provided over one circumference in the circumferential direction of the joint body 3, the device side engaging claw 222 can move in the circumferential direction along the device side groove portion 311. The side connecting portion 2 is rotatable relative to the joint body 3 around the axial direction of the joint body 3 .

When fitting the adapter portion 4 into the joint body 3, the drain side mounting portion 41 is externally fitted onto the drain side fitting portion 32. That is, the drain side fitting part 32 is inserted inside the fitting cylinder part 411. Specifically, the adapter part 4 is moved from the lower side of the joint body 3 to the upper side while guiding the drain side engaging claw 412 by the drain side guide part 322 until the drain side engaging claw 412 fits into the drain side groove part 321. move it. When one drainage side engaging pawl 412 fits into one drainage side groove 321 and the other drainage side engaging pawl 412 fits into the other drainage side groove 321, each of the drainage side engaging pawl 412 and the drainage side groove 321 are engaged to restrict downward movement of the adapter portion 4 and rotation relative to the joint body 3.

As shown in FIG. 2, the drainage joint 1 is installed between equipment and drainage equipment. The drainage joint 1 of this embodiment is directly attached to the equipment H. Furthermore, the drain joint 1 is attached to the device H (for example, a latent heat recovery type water heater) so that one end in the axial direction is on the upper side and the other end is on the lower side.

The drainage joint 1 is attached to a device or the like by engaging the device side engaging portion 212 with the device or the like. Specifically, by screwing together a male thread (not shown) provided in the drainage portion H1 of the device, etc. and a threaded portion 212a, which is a female thread, formed in the device side engaging portion 212, the device side engaging portion 212 The drain joint 1 is connected to the device and the like by engaging with the device and the like. The device-side connecting portion 2 of this embodiment is rotatable relative to the joint body 3 around the axial direction of the joint body 3, so when screwing into a device, etc., only the device-side connecting portion 2 is rotated. Since it can be rotated, it can be easily screwed onto equipment, etc., and can be easily connected to equipment, etc. Furthermore, by rotating the joint body 3 relative to the device-side connecting portion 2, the opening 332a can be oriented in any direction. Furthermore, since the rib 211 is provided on the outer circumferential surface of the device-side engaging portion 212, it is possible to put a finger on the rib 211, for example, so that the device-side connecting portion 2 can be rotated easily.

Furthermore, a pipe or the like communicating with drainage equipment is attached to the lower end of the drainage joint 1. The drain joint 1 of this embodiment is attached to a drain pipe P communicating with drainage equipment via a flexible pipe F. Specifically, by screwing the cap nut F1 of the flexible pipe F into the pipe engaging part 42, the flexible pipe F whose other end is connected to the drain pipe P is engaged with the pipe engaging part 42, and the drain is discharged. Connect fitting 1 to flexible pipe F. When screwing the cap nut F1 into the pipe engagement part 42, apply a tool such as a spanner to the flat surface formed on the outer peripheral surface of the fitting cylinder part 411, and take care not to rotate the joint body 3 and the adapter part 4. By pressing down, it becomes easier to rotate the cap nut F1. In the drainage joint 1 of this embodiment, the adapter part 4 is connected to the joint body 3 (specifically, it is connected in a non-rotatable manner), so only the cap nut F1 can be rotated, making it flexible. Connection to pipe F is easy.

According to the above method, in order to connect the cap nut F1 of the flexible pipe F to the downstream end of the drain joint 1, for example, the center position H1C of the drain part H1 of the device H and the center position PC of the drain pipe P are This misalignment can be absorbed by the bending of the flexible tube F. Therefore, no strain is placed on the drain pipe P. Therefore, it is possible to construct a drainage structure that accommodates the misalignment of the drainage pipe P with respect to the center position PC.

Although the embodiments of the present invention have been described above with reference to one example, the present invention is not limited to the embodiments described above, and various changes can be made without departing from the gist of the present invention.

For example, although the external shape of the joint main body 3 has been described as being cylindrical, it can be made into a cylindrical shape having various shapes such as a rectangular cylindrical shape.

Furthermore, the number of drainage wall portions 331 and water leakage wall portions 332 is not limited to one each, and may be provided in plurality. In this case, a plurality of partition walls 34 are also provided inside the joint body 3 to partition between the plurality of drainage walls 331 and the plurality of water leakage walls 332. For example, the partition wall 34 can be cross-shaped in cross section.

Furthermore, although the drainage joint 1 of the embodiment was provided with the adapter section 4, it may be configured without the adapter section 4. In this configuration, a pipe such as a resin pipe (for example, a PVC pipe) communicating with the drainage equipment is inserted into the drainage side fitting part 32 of the joint body 3, and the outer peripheral surface of the pipe etc. and the drainage side fitting part By bonding the inner circumferential surface of 32 with an adhesive, the drainage joint 1 and piping, etc. can be connected by internal fitting. In this case, the drain side fitting part 32 functions as a piping connection part for the pipe.

Regarding this, in the embodiment described above, the pipe engaging part 42, which is a threaded part, is formed at the downstream end of the adapter part 4, so based on the joint body 3, the threaded part is formed indirectly. I can say that. However, in a configuration that does not include the adapter part 4, a threaded part may be formed at the downstream end of the joint body 3. In this case, based on the joint body 3 standard, it can be said that the threaded portion is directly formed.

In addition, although the three parts, the device-side connection part 2, the joint body 3, and the adapter part 4, have been described as being separate bodies, the device-side connection part 2 and the joint body 3 are configured as one body (in other words, the joint body 3), or the joint body 3 and the adapter part 4 may be formed as an integral part (in other words, the adapter part 4 may be formed as an integral part of the joint body 3). The device-side connection portion 2, the joint body 3, and the adapter portion 4 may all be formed as one unit (in other words, the device-side connection portion may be formed as an integral part of the joint body 3). 2 and an adapter part 4) may be formed.

1 Drainage joint 2 Equipment side connection part 212a Threaded part of equipment side connection part 3 Joint body 32 Piping connection part, drainage side fitting part 4 Adapter part, drainage side connection part 411 Fitting cylinder part (tool engagement part)
42 Threaded part, pipe engagement part 42a Threaded part of pipe engagement part 431 Inner bottom surface F Flexible pipe F1 Cap nut H Equipment H1 Drainage part of equipment

Claims (2)

Consisting of a device that generates drainage, a drainage joint that receives the drainage discharged from the device, and a flexible pipe connected to the downstream side of the drainage joint,
The drainage joint includes a joint body that allows the drainage water from the equipment to pass through and allows backflow water that is flowing in a direction opposite to the drainage water to flow out to the outside, and an adapter part that is detachable from the joint body. Equipped with
The joint body has a piping connection part that can connect a pipe by internal fitting at the downstream end with respect to the flow of the drainage water,
The adapter part is removably attached to the piping connection part,
A threaded portion to which a cap nut of the flexible tube is connected is provided at the downstream end of the adapter portion,
The piping connection part includes:
The pipe, which is a drain pipe through which the waste water passes, can be directly connected without the adapter part being attached;
A drainage connection structure capable of connecting the pipe, which is the drainage pipe, via the flexible pipe attached to the upstream side of the pipe and the adapter part in a state where the adapter part is attached. A drainage joint constituting the drainage connection structure according to claim 1.