JP4684034B2 - Fitting - Google Patents

Description

  According to the present invention, a joint body includes a first connection portion connected to a heat source device having a heat medium supply function, a second connection portion connected to a terminal device that supplies the heat medium from the heat source device, and a test fluid. A normal connection state in which a heat medium is circulated between the first connection part and the second connection part, and a third connection part connected to the inspection fluid supply part supplied to the terminal device; The present invention relates to a joint provided with switching means that can be switched from a third connection portion to an inspection state in which an inspection fluid is circulated from the third connection portion to the second connection portion while blocking between a connection portion and the second connection portion.

  Generally, in a heating system that supplies a heat medium such as hot water or antifreeze liquid from a heat source device such as a hot water supply device to a terminal device such as a heating device, the heat medium is divided from the heat source device and supplied to a plurality of terminal devices. A joint is used when the heat medium from the terminal equipment is joined and returned to the heat source machine.

  On the other hand, in such a heating system or the like, in order to check the leakage of the heat medium on the terminal device side with respect to the heat source device, an airtight inspection for supplying a testing fluid such as water to the terminal device after the operation or periodically is performed. ing. For this reason, as a joint used in a heating system or the like, separately from the first connection part connected to the heat source machine and the second connection part connected to the terminal device, the inspection fluid supply part for supplying the inspection fluid to the terminal device The joint body is provided with a third connection part to be connected, and the normal use state in which the heat medium is circulated between the first connection part and the second connection part is blocked from the first connection part and the second connection part. On the other hand, an investigation has been made on the provision of switching means that can be switched from the third connection portion to the inspection state in which the inspection fluid is circulated from the second connection portion.

  As this kind of technology, the joint body can be slid freely between the normal use state and the inspection state, and in the normal use state and the inspection state, the rotation operation is performed with the direction along the slide direction as the axis. There is known a joint provided with a switching means that can be fixed to the position in that state (see, for example, Patent Documents 1 and 2).

Japanese Patent Laid-Open No. 2001-12758 Japanese Patent Laid-Open No. 2001-12759

  However, although the conventional joint can be easily switched between the normal use state and the inspection state by sliding the switching means, in order to maintain each state, the switching means is operated by rotating the switching means. Must be fixed in position. For this reason, for example, when performing an airtight inspection, the switching means in the normal use state is rotated to release the position, and then slid to switch to the inspection state, and then rotated again to rotate the position of the switching means. The operation of fixing the switch had to be performed, and the switching operation was complicated.

  Further, since the switching means is provided so as to protrude from the joint body by sliding, it is necessary to secure a space for the switching means to slide around the joint. In particular, when the joint is installed in a limited space, there is a problem that workability is deteriorated because the switching means is further narrowed by the sliding amount.

  The present invention has been made in view of the above problems, and an object of the present invention is to provide a joint that is easy to switch between a normal use state and an inspection state and saves space.

In order to achieve the above object, the first characteristic configuration of the joint according to the present invention is that the joint body supplies a first connection portion connected to a heat source unit having a heat medium supply function and a heat medium from the heat source unit. A second connection portion connected to the terminal device; and a third connection portion connected to the inspection fluid supply portion that supplies the inspection fluid to the terminal device; and the first connection portion and the second connection portion A normal use state in which a heat medium is circulated between the first connection part and the second connection part, and an inspection fluid which is circulated from the third connection part to the second connection part while blocking between the first connection part and the second connection part. It is a joint provided with a switching means that can be switched to a state, wherein the switching means is screwed into the switching operation section and a switching operation section that is rotatably inserted in the joint body . Inserted in the switching operation portion in a state that is not rotatable with respect to the joint body. Out retraction move with respect to the switching unit in the direction of the pivot axis by the rotation operation of the switching unit, the normal use state and the test state by closing and releasing the first connecting portion It is in the point provided with the valve element which switches.

That is, according to this configuration, it is possible to switch between the normal use state and the inspection state only by the rotation operation of the switching operation unit, and thus the switching operation is facilitated.
Further, since the valve body moves back and forth with respect to the switching operation portion, it is not necessary to provide a space for the valve body to move outside the joint, and space saving can be realized.

According to a second characteristic configuration of the joint according to the present invention, the valve body includes a first seal portion that cuts off between the first connection portion and the second connection portion, the second connection portion, and the third connection. and a second seal portion that disconnects the parts, in that are provided at different positions along the direction of the pivot axis.

  That is, according to this configuration, since the first seal portion and the second seal portion are provided at different positions along the direction in which the valve element moves, the moving distance of the valve element can be reduced. For this reason, it can switch by simple operation.

Third characterizing feature of the joint according to the present invention, the switching operation portion is the maximum outer diameter relative to the direction of the pivot axis to a point that is larger than the outer diameter of the joint body.

  That is, according to this configuration, the switching operation unit can be easily pinched and the rotation operation is facilitated.

According to a fourth characteristic configuration of the joint according to the present invention, the joint main body is connected to a first connection unit connected to a heat source device having a heat medium supply function and to a terminal device that supplies the heat medium from the heat source device. A connecting portion and a third connecting portion connected to the inspection fluid supply portion that supplies the inspection fluid to the terminal device, and causes the heat medium to flow between the first connecting portion and the second connecting portion. Switching that can be switched between a normal use state and an inspection state in which a fluid for inspection flows from the third connection portion to the second connection portion while blocking between the first connection portion and the second connection portion. A switching operation portion that is rotatable with respect to the joint main body, and the switching operation portion is moved back and forth with respect to the switching operation portion by a rotation operation of the switching operation portion. The normal use state and the inspection state by closing and releasing the first connection part A valve body for switching, said switching means includes a heat medium pressure-receiving surface for receiving the pressure of the heat medium, by a biasing means you have furnished inside the joint body, relatively movable with respect to the joint body In this state, it is biased toward the joint body.

In other words, according to this configuration, when the volume of the heat medium inside the joint expands due to freezing or the like, the switching means has the heat medium pressure receiving surface that receives the pressure of the heat medium, and therefore is attached by the pressure of the heat medium. It moves to the outside against the biasing force of the biasing means. Thereby, the rapid rise of the internal pressure due to the volume expansion of the heat medium can be prevented, and the joint can be prevented from being broken.
In addition, since the urging means is provided inside the joint body, it does not get in the way during the switching operation and is easy to operate.

  In the joint according to the present invention, the joint body has a first connection part that is connected to a heat source machine having a heat medium supply function, a second connection part that is connected to a terminal device that supplies the heat medium from the heat source machine, and an inspection. A normal connection state in which a heat medium is circulated between the first connection part and the second connection part. A joint provided with switching means capable of switching from the third connection part to the test state in which the test fluid is circulated from the third connection part to the second connection part while blocking between the first connection part and the second connection part. The switching means is rotatable with respect to the joint main body, and the first connecting portion is moved back and forth with respect to the switching operation portion by the rotation operation of the switching operation portion. Switching between the normal use state and the inspection state by closing and releasing It is those with a body. Thereby, since it can switch to a normal use state and a test | inspection state only by rotation operation of a switching operation part, switching operation becomes easy. Further, since the valve body moves back and forth with respect to the switching operation portion, it is not necessary to provide a space for the valve body to move outside the joint, and space saving can be realized.

Embodiments of the present invention will be described below with reference to the drawings.
As shown in FIG. 1, the joint 1 according to the present embodiment includes a joint body 2, switching means 3 that can be switched between a normal use state and an inspection state, and a header portion 5 that is connected to the joint body 2. Composed. The material of the joint 1 is not particularly limited, such as resin or metal. For example, polyphenylene sulfide (PPS) that is hard, durable against warm water, and can be integrally formed is preferably used.

The joint body 2 is connected to a first connection portion 21 connected to a heat source device (not shown) such as a hot water supply device, and a second connection connected to a terminal device (not shown) such as a heating device that supplies a heat medium from the heat source device. And a third connection part 23 connected to an inspection fluid supply part (not shown) for supplying the inspection fluid to the terminal device.
1 shows the joint 1 in a normal use state in which a heat medium (solid arrow) is circulated between the first connection portion 21 and the second connection portion 22, and FIG. 2 shows the first connection portion. The joint 1 in an inspection state in which a fluid for inspection (broken arrow) is circulated from the third connection portion 23 to the second connection portion 22 while blocking between the first connection portion 21 and the second connection portion 22 is shown. FIG. 4 is an exploded view of the joint 1.

The switching means 3 is partially inserted into the third connecting portion 23 so as to be movable relative to the joint body 2, and is provided between the inner peripheral surface of the joint body 2 and the outer peripheral surface of the switching means 3. The coil spring 32 is attached so as to be biased toward the joint body 2 side. The coil spring 32 is compressed between the fixing member 24 attached to the joint body 2 and the locking member 33 fixed to the circumferential groove of the switching means 3, and is fixed on one side of the coil spring 32. And the locking member 33 is pressed via the pressing member 44 on the other side. With such a configuration, when the volume of the heat medium inside the joint 1 expands due to freezing or the like, the upper surface of the switching unit 3 becomes a heat medium pressure receiving surface that receives the pressure of the heat medium, and the switching unit 3 Is moved to the outside against the biasing force of the coil spring 32. Thereby, the rapid increase of the internal pressure due to the volume expansion of the heat medium can be prevented, and the joint 1 can be prevented from being broken. Although not particularly limited, providing the coil spring 32 on the inner side of the joint body 2 as in the present embodiment is advantageous because the operation is easy without being disturbed during the switching operation. In the present embodiment, the case where the fixing member 24 is attached to the joint body 2 by screwing has been described as an example. However, the fixing member 24 is not limited thereto, and can be attached by fitting, welding, or the like. The coil spring 32 is an example of the biasing means in the present invention, and is not limited to this.
Further, the joint body 2 and the switching means are sealed by an O-ring 31 so that a heat medium or the like does not leak out.

  The switching means 3 switches between a normal use state and an inspection state. The switching means 3 is rotatable with respect to the joint body 2, and the switching operation portion 34 is operated by a rotation operation of the switching operation portion 34. And a valve body 35 that moves out and retracts. In addition, a supply path 4 for supplying the inspection fluid to the second connection portion 22 is provided inside the switching means 3.

  The switching operation part 34 has a supply port 36 communicating with the supply path 4 and a knob part 37 extending in the outer diameter direction with respect to the rotation axis, and a female screw 34a is provided on the inner peripheral surface. . The supply port 36 is connected to the inspection fluid supply unit and supplies the inspection fluid. The knob portion 37 is provided so that the rotation operation is facilitated by making the outer diameter with respect to the direction of the rotation axis larger than the outer diameter of the joint body 2. Further, the knob portion 37 is provided with a contact portion 38 that protrudes in the outer diameter direction. The portion 34 is configured not to turn in that direction any further. In addition, when the joint 1 is in the inspection state, the anti-rotation portion 25 on the side on which the contact portion 38 abuts is provided with an extending portion 25a extending in the radial direction. Even if a pressure exceeding a certain level is applied to the inside of the housing, the knob portion 25 is in contact with the extending portion 25a so that the switching means 3 does not move to the outside of the joint body 2.

  1-4, the valve body 35 engages with a groove 2a provided on the inner peripheral surface of the joint body 2 along the direction of the rotational axis, and prevents the joint body 2 from rotating. 39 and a male screw 40 that can be screwed into the female screw 34a of the switching operation unit 34. When the switching operation unit 34 is rotated, the valve body 35 is prevented from rotating along with the rotation operation, and the valve body 35 can be moved back and forth with respect to the switching operation unit 34. Yes. Thereby, since it becomes possible to switch between the normal use state and the inspection state only by the rotation operation of the switching operation unit 34, the switching operation becomes easy. Further, since the valve body 35 moves back and forth with respect to the switching operation portion 34, it is not necessary to provide a space for the valve body 35 to move outside the joint body 1, and space saving can be realized.

  Further, the valve body 35 includes two O-rings 41 and 42 and a communication hole 43 through which the inspection fluid flows from the supply path 4 to the second connection portion 22. Each of the two O-rings 41 and 42 is an example of a seal portion in the present invention. The valve body 35 has a lower O-ring 42 in contact with the inner peripheral surface of the joint body 2 in a normal use state and blocks between the communication hole 43 and the third connection portion 23. The O-ring 41 abuts against the inner peripheral surface of the joint body 2 and is provided so as to open the communication hole 43 while blocking between the first connection portion 21 and the second connection portion 22. And by setting it as such a structure, the moving distance of the valve body 35 can be decreased, and switching operation can be performed with few operation | movement.

  In the present embodiment, the second connection portion 22 is indirectly connected to the terminal device via the header portion 5, and as shown in FIG. 5, the end portion of the second connection portion 22 has a flange portion. 26 and convex portions 27 provided at predetermined intervals on the side of the flange portion 26 that contacts the header portion 5.

The header portion 5 includes a main body side connection portion 51 that is connected to the joint main body 2, and three terminal side connection portions 55 that are directly connected to the terminal device or indirectly through a heat medium flow pipe or the like. The The main body side connection portion 51 is provided so as to be fitted in the second connection portion 22, and extends to the outer diameter side of the main body side connection portion 51, and on the side of the flange portion 52 that contacts the joint main body 2. It has four protrusions 53 provided and two O-rings 54 for sealing between the joint body 2 and the header part 5. And if such a main body side connection part 51 and the 2nd connection part 22 are connected so that the front end surface of the projection part 53 may contact | abut with the bottom face of the recessed part formed between the two convex parts 27, it will be protrusion. The portion 53 and the concave portion are engaged, and the circumferential position of the header portion 5 with respect to the joint body 2 can be fixed. Further, for example, if a conventionally known connection member (not shown) such as a clip extending over the joint body 2 and the header 5 is externally fitted, the body side connection portion 51 can be removed from the second connection portion 22 during use. Can be prevented.
Moreover, when connecting the joint main body 2 and the header part 5, the position of the circumferential direction of the header part 5 with respect to the joint main body 2 can be arbitrarily determined by selecting the position of the concave part with which the protrusion 53 is engaged. it can. Thereby, the direction of the terminal side connection part 55 of the header part 5 can be arbitrarily set so that it may be easy to connect with a terminal device, without changing the connection position of the coupling main body 2 with respect to a heat source machine. Furthermore, if the space | interval of recessed parts is made small by reducing the width | variety of the convex part 27 in the flange part 26, it will become possible to set the position of the circumferential direction of the header part 5 with respect to the coupling main body 2 in a finer angle unit. .

  On the other hand, as shown in FIG. 4, the first connection portion 21 of the joint body 2 includes a flange portion 28, a protruding portion 29, and an O-ring 30, similarly to the body-side connection portion of the header portion 5. . And by providing the connection part similar to the 2nd connection part 22 of the coupling main body 2 in a heat source machine, similarly to the case of the connection of the 2nd connection part 22 and the main body side connection part 51, the 1st connection part 21 and A heat source machine can be connected.

  By adopting such a configuration, the joint 1 according to this embodiment is configured such that the communication hole 43 blocks the first connection portion 21 and the second connection portion 22 in a normal use state as shown in FIGS. By switching to the inspection state, the second connection portion 22 is inspected from the supply port 36 via the supply path 4 and the communication hole 43 while blocking between the first connection portion 21 and the second connection portion 22. The working fluid can be circulated. In the present embodiment, the switching operation unit 34 is rotated in one direction once to be in a normal use state, and is rotated in the other direction to be in an inspection state.

  In the present embodiment, the header unit 5 has been illustrated as an example having three terminal-side connection units 55, but the number of terminal-side connection units 55 is not particularly limited, for example, as illustrated in FIG. As described above, two or four terminal side connection portions 55 may be provided. That is, the header unit 5 having the terminal side connection unit 55 corresponding to the number of terminal devices to be connected may be arbitrarily selected.

  In the present embodiment, the case where the third connection portion 23 of the joint body 2 is indirectly connected to the inspection fluid supply portion via the supply port 36 of the switching means 3 has been described as an example, but the present invention is not limited thereto. Instead, it may be directly connected to the inspection fluid supply unit. Moreover, although the switching means 3 showed as an example the case where it inserts in the coupling main body 2 via the 3rd connection part 23, you may provide the insertion port which inserts the switching means 3 separately from the 3rd connection part 23. . In this case, the third connection part 23 can be directly connected to the inspection fluid supply part.

  In this embodiment, although the example which connects the coupling main body 2 and the header part 5 was shown, the coupling main body 2 and the header part 5 can also be provided integrally. In this case, the terminal side connection part 55 in the header part 5 corresponds to the second connection part in the present invention.

  In this embodiment, the example which can interrupt | block between the communicating hole and the 3rd connection part 23 with the O-ring 42 was shown, However, Even if it is the case of a normal use state, for example, the communicating hole 43 and the 3rd connecting part The supply port 36 may be provided with a lid without blocking the connection to the supply port 36.

  In this embodiment, although the example which used O-ring as a sealing member was shown, it is not restricted to this.

  The joint according to the present invention is, for example, in a heating system, a hot water supply system, or the like, a joint that divides the heat medium to supply the heat medium from the heat source device to the plurality of terminal devices, or a heat medium from the plurality of terminal devices. It can be suitably applied to a joint or the like that joins the heat medium to return to the machine.

The figure explaining the normal use state of the joint concerning this embodiment The figure explaining the inspection state of the joint concerning this embodiment The figure explaining the relationship between the joint main body and valve body of the joint which concerns on this embodiment The figure explaining the structure of the coupling which concerns on this embodiment The figure explaining the connection part of the joint concerning this embodiment Schematic of header part according to another embodiment

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Joint 2 Joint main body 21 1st connection part 22 2nd connection part 23 3rd connection part 3 Switching means 34 Switching operation part 35 Valve body

Claims (4)

The joint body
A first connection part connected to a heat source machine having a heat medium supply function;
A second connection unit connected to a terminal device for supplying a heat medium from the heat source unit;
A third connecting portion connected to the inspection fluid supply portion for supplying the inspection fluid to the terminal device;
A normal use state in which a heat medium is circulated between the first connection part and the second connection part;
A joint provided with switching means capable of switching from the third connection part to the test state in which the test fluid is circulated from the third connection part to the second connection part while blocking between the first connection part and the second connection part. There,
The switching means is
A switching operation unit rotatably inserted into the joint body, and
Inserted into the switching operation unit in a state of being screwed to the switching operation unit and being unrotatable with respect to the joint body, and along the direction of the rotation axis by the rotation operation of the switching operation unit. A joint provided with a valve body that moves back and forth with respect to the switching operation portion and switches between the normal use state and the inspection state by closing and releasing the first connection portion. The valve body includes a first seal portion that blocks between the first connection portion and the second connection portion, and a second seal portion that blocks between the second connection portion and the third connection portion. a joint according to claim 1 which is provided at different positions along the direction of the pivot axis. The switching operation unit, the joint according to the maximum outer diameter relative to the direction of the pivot axis to claim 1 or 2 is made larger than the outer diameter of the joint body. The joint body
A first connection part connected to a heat source machine having a heat medium supply function;
A second connection unit connected to a terminal device for supplying a heat medium from the heat source unit;
A third connecting portion connected to the inspection fluid supply portion for supplying the inspection fluid to the terminal device;
From the third connection portion, the normal use state in which the heat medium is circulated between the first connection portion and the second connection portion, while blocking between the first connection portion and the second connection portion. A joint comprising switching means that can be switched to an inspection state in which a fluid for inspection flows through the second connection portion,
The switching means is pivotable with respect to the joint body, and is moved back and forth with respect to the switching operation portion by the turning operation of the switching operation portion, thereby closing and closing the first connection portion. Comprising a valve body that switches between the normal use state and the inspection state by releasing,
The switching means has a heat medium pressure receiving surface that receives the pressure of the heat medium, and is movably moved relative to the joint body by an urging means built in the joint body. joint hand Ru urged Citea on the side.

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