JP2015072035A - Pipe fitting - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a small-sized pipe joint that is composed of one component and that is internally provided with a plurality of long functional members.SOLUTION: A pipe joint 21 includes: a pipe joint body 210; a first channel 211 that almost linearly passes through the pipe joint body 210; and a second channel 212 that almost linearly passes through the pipe joint body 210. The first and second channels 211 and 212 are elongated in an orthogonal direction to partially communicate with each other via a communication part 213. An X-axis and a Y-axis, which are mutual central axes, are provided not to be orthogonal to each other.

Description

  The present invention relates to a pipe joint. Specifically, the present invention relates to a pipe joint having a plurality of long functional members therein.

  2. Description of the Related Art Conventionally, a pipe joint in which a plurality of long functional members such as a strainer and a check valve release pin (hereinafter referred to as a “drain pin”) is provided is known. For example, a check valve for a cold region in which a strainer and a drain pin are provided on the same axis has been proposed (see, for example, Patent Document 1). In addition, a strainer housing member has been proposed in which a strainer and a drain pin are provided on the same axis, and an inflow port and a strainer attaching / detaching port are provided in an orthogonal direction (see, for example, Patent Document 2).

Utility Model Registration No. 2581941 Japanese Patent No. 3885608

  By the way, for example, in a device that requires good handling of piping because of being installed in a small space, such as a small wall-mounted electric water heater, downsizing of the pipe joint is required. However, the conventional pipe joint in which the strainer and the drain pin are provided on the same axis cannot be expected to be downsized. Thus, the present condition is that the small-sized pipe coupling comprised by one part and equipped with several elongate functional members inside is not found so far.

  The present invention has been made in view of the above, and an object of the present invention is to provide a small-sized pipe joint that is composed of one part and includes a plurality of long functional members therein.

  (1) In order to achieve the above object, the present invention provides a pipe joint main body (for example, a pipe joint main body 210 to be described later) and a first flow path (for example, a first to be described later) that penetrates the pipe joint main body substantially linearly. Channel 211) and a second channel (for example, a second channel 212 described later) penetrating the pipe joint body substantially linearly, and the first channel and the second channel are A pipe joint (for example, a below-described pipe joint) provided so as to extend in a substantially orthogonal direction so that a part of each other communicates and the center axes (for example, center axes X and Y to be described later) do not intersect each other. 21).

  In the invention of (1), the first flow path and the second flow path are provided inside the pipe joint main body so as to extend in a substantially orthogonal direction so that a part of each other communicates and the central axes do not cross each other. . Thereby, a plurality of long functional members such as a strainer and a drain pin can be incorporated in a compact manner inside a pipe joint constituted by one part. Therefore, according to the invention of (1), it is possible to provide a small-sized pipe joint that includes one part and includes a plurality of long functional members. As a result, according to the invention of (1), the material cost can be reduced and the number of parts can be reduced.

  (2) The first flow path is extended in the horizontal direction, and a strainer (for example, a strainer 11 described later) is detachably provided therein, and the second flow path is extended in the vertical direction. In addition, a check valve (for example, a check valve 12 with a release function described later) that can be opened from the outside is preferably provided.

In the invention of (2), the first flow path is extended in the horizontal direction, and a strainer is detachably provided therein. Moreover, while extending the 2nd flow path to the perpendicular direction, the check valve which can be opened from the outside is provided in the inside.
Here, with a pipe joint that has a strainer and check valve inside, from the viewpoint of ensuring good maintainability, the strainer can be attached and detached and the check valve can be released without removing the water supply pipe and equipment exterior. Is required. On the other hand, according to the invention of (2), since the strainer can be attached and detached and the check valve can be opened from the outside, the strainer can be cleaned and freeze-prevented without removing the water supply pipe and the exterior of the equipment. As a result, the check valve can be released (drained), so that good maintainability can be ensured and the risk of water leakage and leakage can be avoided.

In addition, in a pipe joint having a strainer inside, when the strainer is attached or detached upward, dust attached to the strainer when removing the strainer for maintenance falls into the flow path, for example, downstream. Since a malfunction occurs due to dust biting into the pressure reducing valve on the side, it is required to avoid such a problem. On the other hand, according to the invention of (2), since the first flow path for providing the strainer is extended in the horizontal direction, the attachment / detachment direction of the strainer becomes the horizontal direction, so that the strainer adheres to the strainer when it is removed. It is possible to avoid the dust that has fallen into the flow path, and to avoid the above problems.
In addition, even when a small electric water heater using the pipe joint according to the invention of (2) is arranged directly under a counter or basin in consideration of use in a wheelchair, the strainer is attached and detached in a horizontal direction. Because of the direction, the strainer can be easily removed and good maintainability can be secured.

  Further, in a pipe joint having a strainer inside, it is necessary to refine the mesh in order to maintain the functions of a downstream pressure reducing valve and reduce pressure loss. However, when the mesh is made finer, it is necessary to secure a larger water contact area in order to satisfy the required flow rate, and as a result of the strainer becoming longer, the pipe joint becomes larger. On the other hand, according to the invention of (2), since the strainer, the check valve and the drain pin can be compactly incorporated inside the pipe joint body, the pipe of the strainer is made finer than before. The joint can be downsized.

  (3) The opening on one end side of the first flow path is an inflow port (for example, an inflow port 211a described later) into which water flows, and the opening on the other end side of the first flow path is inserted with the strainer. The opening on one end side of the second flow path is an outlet (for example, an outlet 212a described later) through which water flowing in from the inlet flows out. The opening on the other end side of the second flow path is an operation port (for example, an operation port 212b described later) provided with operation means (for example, a drain pin 122 described later) for opening the check valve. It is preferable that

In the invention of (3), the opening on one end side of the first flow path is used as an inflow port, and the opening on the other end side is used as a strainer insertion port. Moreover, let the opening of the one end side of a 2nd flow path be an outflow port, and let the opening of the other end side be the operation port which provided the valve opening operation means of the non-return valve.
Thereby, with respect to the inflow port side which connects a water supply pipe | tube, a strainer can be attached or detached from the axial direction opposite side. Therefore, according to the invention of (3), for example, when a pipe joint is used in a wall-mounted electric water heater, the strainer can be maintained more easily because the strainer attaching / detaching direction does not face the wall side. .
In addition, according to the invention of (3), for providing an operation means such as a drainage pin for opening the check valve on the opposite side in the axial direction with respect to the outlet side where the pressure reducing valve or the like is arranged downstream. The check valve can be easily released from the outside.

  According to the present invention, it is possible to provide a small-sized pipe joint that includes one part and includes a plurality of long functional members therein.

It is a permeation | transmission perspective view of the electric water heater which has a pipe joint which concerns on one Embodiment of this invention. It is a disassembled perspective view of the pipe joint which concerns on the said embodiment. It is sectional drawing of the pipe joint which concerns on the said embodiment, and is sectional drawing which contains the central axis of a 1st flow path, and is orthogonal to the central axis of a 2nd flow path. It is sectional drawing of the pipe joint which concerns on the said embodiment, and is sectional drawing which contains the central axis of a 2nd flow path, and is orthogonal to the central axis of a 1st flow path. It is a figure which shows the use condition of the electric water heater which has a pipe joint which concerns on the said embodiment. It is a piping lineblock diagram of an electric water heater which has a pipe joint concerning the above-mentioned embodiment.

Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings.
FIG. 1 is a transparent perspective view of an electric water heater 1 having a pipe joint 21 according to an embodiment of the present invention. As shown in FIG. 1, an electric water heater 1 is a small electric hot water composed of a water supply unit 2, a hot water storage unit 3, a hot water supply unit 4, an expanded water discharge unit 5, and a substantially rectangular parallelepiped casing 6. It is a vessel. In the electric water heater 1, water supplied by the water supply unit 2 is heated by the hot water storage unit 3 and stored as hot water, and the stored hot water is supplied by the hot water supply unit 4. Further, the expanded water generated during heating in the hot water storage unit 3 is discharged to the outside by the expanded water discharge unit 5.

The water supply unit 2 includes a pipe joint 21, a water supply pipe 22, a pressure reducing valve 23, a bypass pipe 24, and a water supply port 25.
The pipe joint 21 is provided on the upper surface of the casing 6, and the upstream end of the water supply pipe 22 is connected to the downstream side thereof. In addition, a direct pressure water supply pipe 71 connected to a water pipe is connected to the upstream side of the pipe joint 21 via a stop cock 72 described later. The configuration of the pipe joint 21 according to this embodiment will be described in detail later.

  The water supply pipe 22 extends downward and is connected to the lower part of the hot water storage tank 30 via a pressure reducing valve 23 described later. Thereby, water is supplied into the hot water storage tank 30.

  The pressure reducing valve 23 is a pressure regulating valve (regulator) provided in the middle of the water supply pipe 22. The pressure reducing valve 23 depressurizes high-pressure water introduced through the pipe joint 21. Thereby, the decompressed water is supplied into the hot water storage tank 30.

  The bypass pipe 24 is branched from the first branch portion 221 of the water supply pipe 22 on the downstream side of the pressure reducing valve 23. The bypass pipe 24 extends upward and is connected to a water supply port 25 described later.

  The water supply port 25 is provided on the upper surface of the casing 6, and the opening thereof faces substantially in the horizontal direction (right direction in FIG. 1). A same-pressure water supply pipe 73 connected to a faucet fitting 7 described later is connected to the downstream side of the water supply port 25. Thereby, the water decompressed by the pressure reducing valve 23 is supplied from the water supply port 25 to the faucet fitting 7 through the same pressure water supply pipe 73.

The hot water storage unit 3 includes a hot water storage tank 30 and a drain valve 30a.
The hot water storage tank 30 includes a hot water storage tank main body 31 and a heater 32 described later.
The hot water storage tank body 31 is configured by a thin cylindrical tank having a substantially cylindrical shape extending in the vertical direction. The inner wall of the hot water tank main body 31 is provided with a temperature controller and an overtemperature prevention device (not shown). The temperature controller and the overheat prevention device control the energization amount of the heater 32 to be described later, so that hot water at a predetermined temperature (for example, 70 ° C. to 80 ° C.) is not excessively heated in the hot water storage tank body 31. Boiled.

  The heater 32 is provided in the hot water storage tank main body 31. The heater 32 is configured by a heater pipe curved in the hot water storage tank body 31. As described above, the energization amount of the heater 32 is controlled by the temperature controller and the overheat prevention device.

  The drain valve 30 a is provided at a connection portion between the lower part of the hot water tank main body 31 and the water supply pipe 22. The drain valve 30a is opened by pushing a drain pin provided in a pipe joint 21 described later for the purpose of maintenance and freezing prevention. Thereby, the water in the water supply pipe 22 is discharged outside.

The hot water supply unit 4 includes a hot water supply pipe 41, a hot and cold water mixing valve 42, and a hot water supply port 43.
The upstream side of the hot water supply pipe 41 is connected to the upper part of the hot water storage tank body 31. Moreover, the downstream side is connected to the hot water supply port 43 mentioned later.

  The hot water mixing valve 42 is provided in the middle of the hot water supply pipe 41. A bypass pipe 24 branched from the water supply pipe 22 is connected to the hot water mixing valve 42. Thereby, the water supplied from the water supply pipe 22 and the hot water supplied from the hot water supply pipe 41 are mixed. An automatic temperature controller such as a thermostat (not shown) is provided inside the hot and cold mixing valve 42. With this automatic temperature controller, the mixing ratio of hot water is automatically adjusted so that the hot water after mixing has a predetermined temperature suitable for use (for example, 38 ° C. to 42 ° C.).

  The hot water supply port 43 is provided on the upper surface of the casing 6, and the opening thereof is substantially in the same direction as the opening of the water supply port 25 in the horizontal direction. The downstream side of the hot water supply port 43 is connected to the faucet fitting 7 via a hot water discharge pipe 74 described later. As a result, hot water mixed with hot water with the hot water mixing valve 42 and adjusted to an appropriate temperature is supplied to the faucet fitting 7.

The expansion water discharge unit 5 includes an expansion water discharge pipe 51, a relief valve 52, and an expansion water discharge port 53.
The expansion water discharge pipe 51 is provided to be branched from the second branch part 222 of the water supply pipe 22 on the downstream side of the first branch part 221. The expansion water discharge pipe 51 extends upward and is connected to an expansion water discharge port 53 described later.

  The relief valve 52 is provided in the middle of the expansion water discharge pipe 51. The relief valve 52 is a safety valve that opens when the internal pressure exceeds a predetermined pressure and closes when the internal pressure falls below the predetermined pressure. When the relief valve 52 is opened, the expanded water generated during heating by the heater 32 is introduced into the expanded water discharge pipe 51. The relief valve 52 includes a test pin 521 provided on the front surface of the casing 6, and can be opened and closed by operating the test pin 521 during maintenance.

  The expansion water discharge port 53 is provided on the upper surface of the casing 6, and the opening thereof is directed substantially in the same direction as the openings of the water supply port 25 and the hot water supply port 43 in the horizontal direction. An expansion water discharge hose 75 connected to a drainage device 76 described later is connected to the downstream side of the expansion water discharge port 53. Thereby, the expanded water generated during heating by the heater 32 is discharged to the outside.

Next, the configuration of the pipe joint 21 according to the present embodiment will be described in detail with reference to FIGS.
FIG. 2 is an exploded perspective view of the pipe joint 21 according to the present embodiment. FIG. 3 is a cross-sectional view of the pipe joint 21 according to the present embodiment, and is a cross-sectional view that includes the central axis X of the first flow path 211 and is orthogonal to the central axis Y of the second flow path 212. FIG. 4 is a cross-sectional view of the pipe joint 21 according to the present embodiment, and is a cross-sectional view that includes the central axis Y of the second flow channel 212 and is orthogonal to the central axis X of the first flow channel 211.
As shown in FIG. 2, the pipe joint 21 includes a pipe joint main body 210, a first flow path 211, a second flow path 212, a strainer 11, and a check valve 12 with a release function.

  In the pipe joint main body 210, a first flow path portion 211c in which a later-described first flow path 211 is formed and a second flow path portion 212c in which a later-described second flow path 212 is formed are integrated. Configured. The first flow path portion 211c extends in the horizontal direction and has an outer shape that is cylindrical. The second flow path portion 212c extends in the vertical direction, and its outer shape is a cylindrical shape composed of a small-diameter upper portion and a large-diameter lower portion.

  The pipe joint main body 210 is provided on the upper surface of the casing 6 of the electric water heater 1 so as to be rotatable about a vertical rotation axis (see FIG. 1). Thereby, since the water supply direction through the direct-pressure water supply pipe 71 can be changed, interference with piping connected to other devices in a small space is avoided, and good workability is ensured. In addition, in this embodiment, the insertion port 211b of the strainer 11 mentioned later is attached so that it may face substantially the same direction (right direction of FIG. 1) as the opening of the water supply port 25 and the hot water supply port 43.

The first flow path 211 passes through the inside of the pipe joint body 210 in a substantially straight line and extends in the horizontal direction. Moreover, the 2nd flow path 212 penetrates the inside of the pipe joint main body 210 substantially linearly, and is extended in the perpendicular direction. That is, the first channel 211 and the second channel 212 extend in the orthogonal direction.
In addition, as shown in FIG. 3, the 1st flow path 211 has the internal diameter substantially the same in the axial direction. On the other hand, as shown in FIG. 4, the second flow path 212 has an inner diameter that differs in the axial direction, and includes a lower large-diameter portion 212d and an upper small-diameter portion 212e.

  Further, the first flow path 211 and the second flow path 212 are provided so that the central axes X and Y do not intersect each other. That is, the central axis X of the first flow path 211 extending in the horizontal direction and the central axis Y of the second flow path 212 extending in the vertical direction do not intersect each other. More specifically, as shown in FIG. 3, the central axis X extending in the left-right direction in FIG. 3 and the central axis Y extending in the direction orthogonal to the paper surface do not intersect. Similarly, as shown in FIG. 4, the central axis Y extending in the vertical direction in FIG. 4 and the central axis X extending in the direction orthogonal to the paper surface do not intersect.

  The first flow path 211 and the second flow path 212 are partially in communication with each other. More specifically, as shown in FIG. 3 and FIG. 4, a communication portion 213 is formed by communication between parts on the radially outer side of each flow path. This communication part 213 ensures the circulation of water as a fluid.

  The opening on one end side (the left side in FIGS. 2 and 3) of the first flow path 211 is an inflow port 211a into which water flows. Further, the opening on the other end side (the right side in FIGS. 2 and 3) of the first flow path 211 is an insertion port 211b into which a strainer 11 described later is inserted. The insertion port 211b is a screw because a thread groove is formed on the inner periphery thereof.

  On the other hand, the opening on one end side (the lower side in FIGS. 2 and 4) of the second flow path 212 is an outlet 212 a through which water flowing in from the inlet 211 a of the first flow path 211 flows out. Further, the opening on the other end side (the upper side in FIGS. 2 and 3) of the second flow path 212 is provided with a drain pin 122 for opening the check valve 124 in the check valve 12 with a release function described later. The operation port 212b.

  The strainer 11 is detachably provided in the first flow path 211. The strainer 11 includes a strainer body 112, a strainer cap 115, and O-rings 111, 113, and 114.

  The strainer body 112 has a long cylindrical shape. The strainer body 112 covers both the annular portions 112a and 112b provided at both ends, a connecting portion 112c formed in the circumferential direction and extending in the central axis X direction to connect the annular portions, and the side periphery. And a mesh 112d provided in the above. The mesh 112d of the present embodiment is a 200 mesh finer than the 60 mesh normally used in the past.

  The strainer cap 115 has a substantially cylindrical shape and is a male screw having a thread groove formed on the outer periphery. Thereby, the strainer cap 115 is inserted into the inside from the insertion port 211b of the first flow path 211, and is fixed by being screwed into the insertion port 211b.

  The strainer body 112 and the strainer cap 115 are connected via an O-ring 113. Further, the O-rings 111 and 114 are respectively inserted into the first flow path 211 from the insertion port 211b and attached with the O-rings 111 and 114 being attached to the outer periphery.

  The check valve 12 with the release function is provided in the second flow path 212. The check valve 12 with a release function includes a drain pin 122, a check valve 124, a spring 125, a check valve guide 126, and O-rings 121 and 123.

The check valve 124 includes a columnar base end portion 124a and a tip end portion 124b (see FIG. 4) having a conical surface whose diameter increases toward the tip.
The base end portion 124 a is fitted into the inner ring 126 a of the double annular check valve guide 126 with the spring 125 attached to the outer periphery thereof. The distal end portion 124 b has an outer diameter smaller than that of the large diameter portion 212 d of the second flow path 212 and larger than that of the small diameter portion 212 e of the second flow path 212. This tip end portion 124b is in contact with a rod-shaped and cylindrical drainage pin 122.

  The check valve 12 with the release function having the above-described configuration is configured such that the O-rings 121 and 123 are attached to the outer periphery of the drain pin 122 and the outer periphery of the tip of the check valve 124, respectively. Installed inside. More specifically, as shown in FIG. 4, the check valve 124 is biased upward by the elastic force of the spring 125, and its tip end portion 124 b passes through the flow path of the small diameter part 212 e of the second flow path 212. Arranged to close. As a result, when water having a supply water pressure larger than the biasing force of the spring 125 is supplied from the inflow port 211a, the check valve 124 moves downward to open the flow path.

  The drain pin 122 has a distal end (lower end) 122 a in contact with the distal end portion 124 b of the check valve 124 and a base end (upper end) 122 b protruding from the operation port 212 b of the second flow path 212. Be placed. As a result, by pushing the drain pin 122 downward as a freeze prevention measure, the check valve 124 moves downward, the second flow path 212 is opened, and drainage is performed.

The usage method of the electric water heater 1 provided with the above structure is demonstrated with reference to FIG.
FIG. 5 is a diagram illustrating a usage state of the electric water heater 1 having the pipe joint 21 according to the present embodiment.
As shown in FIG. 5, the electric water heater 1 is disposed below the wash basin 70 provided with the faucet fitting 7. As described above, the electric water heater 1 is used while being fixed to a narrow space. The electric water heater 1 is driven by connecting a power cord 8 to a wall outlet 9 and turning on a power switch 61 provided on the front surface of the casing 6.

  As described above, the pipe joint 21 is connected to the direct pressure water supply pipe 71 connected to the water pipe through the water stop cock 72. The direct pressure water supply pipe 71 extends from the water stop cock 72 and bends toward the electric water heater 1 and then extends in a substantially horizontal direction. The high-pressure water supplied from the water pipe flows through the direct pressure water supply pipe 71.

  The same-pressure water supply pipe 73 connected to the faucet fitting 7 is connected to the water supply port 25. The same-pressure water supply pipe 73 extends from the water supply port 25 in a substantially horizontal direction (rightward in FIG. 5) and then extends obliquely upward. In the same pressure water supply pipe 73, the water depressurized by the pressure reducing valve 23 flows.

  A hot water outlet pipe 74 connected to the faucet fitting 7 is connected to the hot water supply port 43. The hot water discharge pipe 74 is provided so as to extend obliquely upward after extending in a substantially horizontal direction (right direction in FIG. 5) from the hot water supply port 43. Hot water that has been adjusted to an appropriate temperature by mixing hot water and water by the hot water mixing valve 42 flows through the hot water supply pipe 74.

  An expansion water discharge hose 75 connected to a drainage device 76 to be described later is connected to the expansion water discharge port 53. The inflation water discharge hose 75 extends from the inflation water discharge port 53 in a substantially horizontal direction (right direction in FIG. 5), then extends obliquely upward, and again extends in a substantially horizontal direction (right direction in FIG. 5). The expanded water discharge hose 75 circulates expanded water generated during heating by the heater 32.

  The downstream side of the drainage device 76 is connected to a drainage pipe 77 provided at the lower part of the basin 70. Inside the drainage device 76, a trap-type sealing portion 76a is provided. The sealed water in the sealed water portion 76a prevents the odor in the sewage pipe connected to the downstream side of the drain pipe 77 from rising and entering the room.

  With the electric water heater 1 used as described above, hot water is supplied to the faucet fitting 7 from the tap water pipe 74 and water is supplied from the same pressure water supply pipe 73. Hot water and water supplied to the faucet fitting 7 are mixed and then discharged from the water outlet 7a.

Next, operation | movement of the electric water heater 1 which has the pipe joint 21 which concerns on this embodiment is demonstrated in detail with reference to FIG.
FIG. 6 is a piping configuration diagram of the electric water heater 1 having the pipe joint 21 according to the present embodiment.
First, when the faucet fitting 7 is operated to open the same-pressure water supply pipe 73, high-pressure water is introduced into the water supply pipe 22 from the direct pressure water supply pipe 71 through the pipe joint 21. When passing through the pipe joint 21, the water supplied from the inflow port 211 a of the first flow path 211 passes through the strainer 11 provided in the interior, whereby the dust in the water is removed. Next, the high-pressure water that has passed through the check valve 12 with the release function is decompressed by the decompression valve 23, then flows through the water supply pipe 22 and is supplied into the hot water storage tank body 31.

  In the hot water storage tank body 31 supplied with water, hot water is boiled in the hot water storage tank body 31 by energizing the heater 32. At this time, energization of the heater 32 is controlled by a temperature controller and an overheat prevention device provided on the inner wall of the hot water storage tank body 31, and hot water having a predetermined temperature (for example, 70 ° C. to 80 ° C.) without excessive temperature rise. Is boiled.

  In addition, when boiling water in the hot water storage tank main body 31, expanded water is generated due to an increase in pressure in the hot water storage tank main body 31. When the internal pressure exceeds a predetermined pressure, the relief valve 52 is opened, and the generated expansion water is supplied to the sealing portion 76a in the drainage device 76 via the expansion water discharge pipe 51 and the expansion water discharge hose 75, It becomes the sealing water in the part 76a.

  The hot water in the hot water storage tank body 31 is pushed into the hot water supply pipe 41 and supplied to the hot water mixing valve 42 by the water supply pressure in the water supply pipe 22. At the same time, water is supplied to the hot and cold water mixing valve 42 through the bypass pipe 24 branched from the water supply pipe 22. At this time, in the hot water / water mixing valve 42, the mixing ratio of hot water and water is automatically adjusted so that the hot water after mixing becomes a predetermined temperature suitable for use (for example, 38 ° C. to 42 ° C.) by an automatic temperature controller provided therein. Adjusted.

  The hot water adjusted to an appropriate temperature by the hot / cold water mixing valve 42 is supplied from the hot water supply port 43 to the faucet fitting 7 through the hot water outlet pipe 74. At the same time, water is supplied from the water supply port 25 to the faucet fitting 7 through the same pressure water supply pipe 73. The hot water and water supplied to the faucet fitting 7 are mixed and then discharged from the water outlet 7a.

  Further, when draining for the purpose of preventing freezing, the base end (upper end) 122b of the draining pin 122 protruding from the operation port 212b of the second channel 212 is pushed downward. Then, the check valve 124 moves downward against the urging force of the spring 125, thereby opening the second flow path 212. Thereby, the pressure in the water supply pipe 22 decreases, and the water drain valve 30a provided at the lower part of the hot water storage tank body 31 is opened, so that the water in the pipe joint 21 and the water supply pipe 22 is discharged to the outside. The

According to this embodiment, the following effects are produced.
In the present embodiment, the first flow path 211 and the second flow path are formed in the pipe joint main body 210 so as to extend in the orthogonal direction so that a part of each other communicates and the central axes X and Y do not intersect each other. 212 was provided. Thereby, a plurality of long functional members such as the strainer 11 and the drain pin 122 can be compactly incorporated in the pipe joint 21 constituted by one component. Therefore, according to this embodiment, it is possible to provide a small-sized pipe joint 21 that includes a single component and includes a plurality of long functional members. As a result, according to this embodiment, material cost can be reduced and the number of parts can be reduced.

Moreover, in this embodiment, while extending the 1st flow path 211 in the horizontal direction, the strainer 11 was provided in the inside so that attachment or detachment was possible. The second flow path 212 extends in the vertical direction, and the check valve 12 with a release function that can be opened from the outside is provided therein.
Here, with a pipe joint that has a strainer and check valve inside, from the viewpoint of ensuring good maintainability, the strainer can be attached and detached and the check valve can be released without removing the water supply pipe and equipment exterior. Is required. On the other hand, according to this embodiment, since the strainer 11 can be attached and detached and the check valve 12 with a release function can be opened from the outside, the strainer 11 can be cleaned without removing the water supply pipe and the exterior of the equipment. As a result of the release (drainage) of the check valve 124 to prevent freezing, good maintainability can be ensured, and the risk of water leakage and leakage can be avoided.

In addition, in a pipe joint having a strainer inside, when the strainer is attached or detached upward, dust attached to the strainer when removing the strainer for maintenance falls into the flow path, for example, downstream. Since a malfunction occurs due to dust biting into the pressure reducing valve on the side, it is required to avoid such a problem. On the other hand, according to the present embodiment, since the first flow path 211 in which the strainer 11 is provided extends in the horizontal direction, the strainer 11 is attached to the strainer 11 when the strainer 11 is removed. The attached dust can be prevented from falling into the flow path, and the above problem can be avoided.
Moreover, even when the small electric water heater 1 using the pipe joint 21 according to the present embodiment is arranged directly under the counter or the basin in consideration of use in a wheelchair, the attaching / detaching direction of the strainer 11 is not limited. Since it is a horizontal direction, the strainer 11 can be removed easily and favorable maintenance property can be ensured.

  Further, in a pipe joint having a strainer inside, it is necessary to refine the mesh in order to maintain the functions of a downstream pressure reducing valve and reduce pressure loss. However, when the mesh is made finer, it is necessary to secure a larger water contact area in order to satisfy the required flow rate, and as a result of the strainer becoming longer, the pipe joint becomes larger. On the other hand, according to the present embodiment, the strainer 11, the check valve 124, and the drain pin 122 can be compactly incorporated inside the pipe joint main body 210, so that the mesh of the strainer 11 is 200 compared to the conventional case. The pipe joint 21 can be miniaturized in spite of the fine mesh.

In the present embodiment, the opening on one end side of the first flow path 211 is the inflow port 211a, and the opening on the other end side is the insertion port 211b of the strainer 11. In addition, the opening on one end side of the second flow path 212 is an outflow port 212a, and the opening on the other end side is an operation port 212b provided with a drain pin 122.
Thereby, with respect to the inflow port 211a side which connects the direct pressure water supply pipe | tube 71, the strainer 11 can be attached or detached from the axial direction opposite side. Therefore, according to this embodiment, since the attachment / detachment direction of the strainer 11 can be prevented from being directed to the wall side, the strainer 11 can be maintained more easily.
In addition, according to the present embodiment, the drainage pin 122 for opening the check valve 124 is provided on the opposite side in the axial direction with respect to the outlet 212a side where the pressure reducing valve 23 and the like are disposed downstream, Therefore, the check valve 124 can be drained easily.

It should be noted that the present invention is not limited to the above-described embodiment, and modifications, improvements, etc. within a scope that can achieve the object of the present invention are included in the present invention.
In the said embodiment, although the pipe joint 21 which concerns on this invention was applied to the electric water heater 1, it is not limited to this, It is applicable to various apparatuses.

1 ... Electric water heater 11 ... Strainer 12 ... Check valve with release function (check valve)
21 ... Fitting 122 ... Drain pin (operation means)
124 ... Check valve 210 ... Pipe fitting body 211 ... First flow path 212 ... Second flow path 213 ... Communication part 211a ... Inlet 211b ... Insertion port 212a ... Outlet 212b ... Operation port X, Y ... Central axis

Claims (3)

A fitting body,
A first flow path penetrating the pipe joint body substantially linearly;
A second flow path that penetrates the pipe joint body substantially linearly,
The first flow channel and the second flow channel are pipe joints that extend in a substantially orthogonal direction so that a part of the first flow channel and the second flow channel communicate with each other and the central axes do not intersect each other. The first flow path extends in the horizontal direction, and a strainer is detachably provided therein.
The pipe joint according to claim 1, wherein the second flow path is provided with a check valve that extends in a vertical direction and that can be opened from the outside. The opening on one end side of the first flow path is an inlet into which water flows,
The opening on the other end side of the first flow path is an insertion port for inserting the strainer,
The opening on the one end side of the second flow path is an outlet from which water flowing in from the inlet flows out,
The pipe joint according to claim 2, wherein the opening on the other end side of the second flow path is an operation port provided with an operation means for opening the check valve.

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