JP2019011926A - Heat source machine header - Google Patents

Abstract

To provide a heat source machine header capable of surely preventing falling of a handle from a main pipe though it can be easily assembled, being easily attached to a heat source machine, and easily performing an opening/closing operation of a valve.SOLUTION: An introduction groove 18 of a guide projection 31 formed on a handle 3, and a lead groove 19 continued from the introduction groove 18 are formed on a main pipe 2, and a valve restriction groove 20 to which a stop projection 44 formed on a valve 4 is abutted when the valve 4 is rotated and operated to an opening position is formed. The valve restriction groove 20 has an end portion to which the stop projection 44 is abutted when the valve 4 is rotated to the opening position, on a position to disable intrusion of the guide projection 31 into the guide groove 18.SELECTED DRAWING: Figure 11

Description

  The present invention relates to a heat source unit header that branches a fluid such as hot water, antifreeze, fluid heat medium, or steam supplied from a heat source unit such as a water heater for each branch pipe.

  The applicant of the present application first forms a header body (main pipe) attached to the heat source machine, a branch body (branch pipe) whose one end is connected to the header body, and a header body as this type of heat source machine header. There has been proposed a valve including a valve for opening and closing the fluid flow path and a handle for opening and closing the valve (see, for example, Patent Document 1).

  The conventional heat source machine header has a lead groove with a large lead angle in the handle, and the protrusion formed on the header body is inserted into this lead groove, so the rotation angle of the handle necessary for opening and closing the valve can be reduced. The fluid channel opening / closing operation can be facilitated.

JP 2004-116601 A

  However, in the conventional heat source machine header, an introduction vertical groove having a shallower groove depth than the lead groove is formed at the open end of the lead groove, and the protrusion formed on the header body is forced through the shallow introduction vertical groove. Thus, it is configured to be pushed into the lead groove. For this reason, the conventional heat source machine header requires special equipment such as a press device when assembling the handle to the header body, and there is a problem that the assembly efficiency of the heat source machine header is poor.

  Also, in the conventional heat source machine header, if the groove depth of the introduction vertical groove is made too shallow, the protrusion and / or the introduction vertical groove are likely to be damaged when the protrusion is pushed. Naturally, there are limits. For this reason, in the conventional heat source machine header, when the handle is rotated to the end in the rotation direction, the protrusion gets over the step formed between the lead groove and the introduction vertical groove and enters the introduction vertical groove. There is also a problem that it is easy to enter and it is difficult to completely prevent the handle from falling off the header body. Such a problem can be solved by adding parts to prevent the handle from dropping off from the header body, but this increases the number of assembly steps and increases the cost, and is difficult to adopt. .

  Furthermore, the conventional heat source machine header is configured to connect the branch body to the outer periphery of the second insertion port formed in the header body, and from the first insertion port formed in the header body to the branch body. The opening area of the fluid flow path leading to is large. For this reason, the conventional heat source machine header has a long length of the header body, and there is a problem that it becomes difficult to attach and remove the heat source machine depending on the installation height of the heat source machine from the floor surface.

  In addition, since the conventional heat source machine header has a large opening area of the fluid flow path from the first insertion port to the branch body, the valve is moved between the open position and the closed position of the fluid flow path. There is also a problem that the amount of operation of the handle when performing the operation is large and it is difficult to open and close the valve.

  The present invention has been made to solve such problems of the prior art, and an object of the present invention is to easily assemble and prevent the handle from dropping off from the main pipe, and to attach to the heat source machine and the valve. It is to provide a heat source machine header that can be easily opened and closed.

  In order to solve the problems of the conventional technology, the present invention provides a main pipe attached to a heat source machine, a branch pipe connected to the main pipe, a valve for opening and closing a fluid flow path formed in the main pipe, In the heat source machine header including a handle for opening and closing a valve, the main pipe is formed with an introduction groove of a guide projection formed on the handle and a lead groove following the introduction groove on an outer peripheral surface of the handle attachment portion. In addition, when the valve is rotated to the open position, a valve restricting groove that abuts a stop protrusion formed on the valve is formed on the inner peripheral surface of the handle mounting portion, and the valve restricting groove opens the valve. An end portion against which the stop protrusion is abutted when rotated to a position is formed at a position where the guide protrusion cannot enter the introduction groove.

  According to this configuration, by stopping the stop protrusion formed on the valve against the valve restricting groove formed on the main pipe, the stop position of the guide protrusion formed on the handle cannot enter the introduction groove formed on the main pipe. Since the position is regulated, it is possible to reliably prevent the handle from falling off the main pipe. In addition, according to this configuration, since it is not necessary to make the groove depth of the introduction groove shallower than the groove depth of the lead groove, no special equipment such as a press machine is required when assembling the main pipe and the handle. Assembling work can be facilitated. Furthermore, according to this configuration, no special member is required to prevent the handle from dropping off from the main pipe. From this point, the assembly of the main pipe and the handle can be facilitated and the cost of the heat source machine header can be reduced. Can be achieved.

  In the heat source machine header having the above-described configuration, the main pipe includes an insertion port to the heat source machine and an attachment port for the branch pipe, and the branch pipe has one end on an inner periphery of the attachment port. It is connected to the main pipe by insertion, and a communication flow is provided between the insertion port and the attachment port at a position biased toward the insertion port side with respect to the center of the fluid flow path formed in the branch pipe. A path is formed.

  According to this configuration, since the communication channel that is biased toward the insertion port side from the center of the fluid channel formed in the branch pipe is formed between the insertion port and the attachment port of the main pipe, The installation position can also be biased toward the insertion port as compared with the case where the communication channel is formed concentrically with the fluid channel formed in the branch pipe. For this reason, according to this structure, while the full length of a main pipe can be shortened, the attachment of the heat-source equipment header to a heat-source equipment can be made easy, and the freedom degree of the installation position of the heat-source equipment with respect to a floor surface can be raised. Furthermore, according to this configuration, the opening height of the communication channel can be made smaller than the opening height of the fluid channel, so the amount of movement of the valve for opening and closing the communication channel can be reduced, and the valve can be opened and closed. It is possible to easily rotate the handle for this purpose.

  In the heat source machine header having the above-described configuration, the branch pipe is configured such that a mounting posture with respect to the main pipe can be changed, and a charge for leakage inspection is provided at a tip of the branch pipe. The mouth is rotatably connected to the branch pipe.

  According to the above configuration, the charge port can always be kept downward even when the mounting orientation of the branch pipe relative to the main pipe is changed. Can do.

  In the heat source machine header having the above-described configuration, the main pipe can be visually observed from the outside when the handle is rotated to the open position of the valve within the movable range of the handle. Is provided with an open / close identification member that cannot be viewed from the outside when the valve is rotated to the closed position of the valve.

  When the handle is rotated in one direction, the handle moves to the inlet side of the main pipe together with the valve. When the handle is rotated in another direction, the handle moves in a direction away from the main tube insertion port together with the valve. Therefore, by providing the open / close identification member within the movable range of the handle in the main pipe, it is possible to visually recognize whether the valve is in the open position or the closed position of the communication flow path. In addition, since the open / close identification member can be mounted with a certain length in the circumferential direction of the main pipe, the operator can open and close the valve as compared with the case where a convex shape for open / close identification is formed on a part of the outer surface of the main pipe and the handle. The state can be easily and reliably identified.

  According to the present invention, it is possible to improve the assembly of the heat source machine header and reliably prevent the handle from falling off the main pipe. In addition, it is possible to facilitate the attachment of the heat source unit header to the heat source unit and the opening / closing operation of the valve.

It is a perspective view of the heat source machine header concerning an embodiment. It is sectional drawing of the valve open state of the heat-source equipment header which concerns on embodiment. It is sectional drawing of the valve closed state of the heat-source equipment header which concerns on embodiment. It is a perspective view of the main pipe concerning an embodiment. It is a front view of the main pipe concerning an embodiment. It is sectional drawing of the main pipe which concerns on embodiment. It is the bottom view seen from the handle attachment part side of the main pipe concerning an embodiment. It is the top view seen from the opening end side of the handle concerning an embodiment. It is AA sectional drawing of FIG. It is a perspective view of the valve concerning an embodiment. It is explanatory drawing which shows the operation | movement and effect of the heat-source equipment header which concern on embodiment.

  Hereinafter, the structure of the heat-source equipment header which concerns on embodiment is demonstrated based on figures.

  As shown in FIGS. 1 to 3, the heat source machine header 1 according to the embodiment includes a main pipe 2, a handle 3 attached to the main pipe 2 so as to be rotatable and capable of moving forward and backward, and a main pipe 2 that is assembled integrally with the handle 3. It is mainly composed of a valve 4 housed therein, a branch pipe 5 connected to the main pipe 2, and a charge port 6 attached to the tip of the branch pipe 5. The main pipe 2 and the branch pipe 5 are detachably connected using a fixed band 7. The main pipe 2, the handle 3, the valve 4 and the charge port 6 are integrally formed with a resin material such as polyamide resin, polyacetal resin, polypropylene resin, polybutylene terephthalate resin, polyphenylene sulfide resin, and the like. The fixing band 7 is formed of a metal material such as stainless steel, for example.

  As shown in FIGS. 4 to 7, the main pipe 2 includes an insertion port 11 to be inserted into a fluid supply port or a fluid recovery port of a heat source machine (not shown), a handle attachment portion 12 to which the handle 3 is attached, and an insertion port 11. And an attachment port 13 of the branch pipe 5 formed between the handle attachment portion 12 and the handle attachment portion 12.

  Two O-ring mounting grooves 14 are formed in parallel on the outer peripheral surface of the insertion port 11 at a predetermined interval. As shown in FIGS. 1 to 3, an O-ring 15 is attached to the O-ring attachment groove 14. A circular stopper 16 is formed between the insertion port 11 and the attachment port 13 to restrict the stop end of the main pipe 2 with respect to a heat source machine (not shown).

  As shown in FIGS. 4 and 5, the setting groove 17 of the opening / closing identification member extending in the circumferential direction of the handle mounting portion 12 and one end communicate with the lower end portion of the handle mounting portion 12 on the outer peripheral surface of the handle mounting portion 12. In addition, an introduction groove 18 having the other end side extending toward the insertion port 11 along the axial direction of the handle mounting portion 12 and a lead groove 19 following the introduction groove 18 are formed. The introduction groove 18 and the lead groove 19 are formed to the same depth. The lead groove 19 has one end communicating with the introduction groove 18, the other end side extending in a direction inclined with respect to the axial direction of the main pipe 2, one end communicating with the inclined groove 19 a, and the other end side of the handle mounting portion. 12 horizontal grooves 19b extending in the circumferential direction. Note that two sets of the introduction groove 18 and the lead groove 19 are formed at point-symmetrical positions around the central axis of the main pipe 2. Further, as shown in FIG. 7, two valve restricting grooves 20 formed in a fan shape are formed on the inner peripheral surface of the handle mounting portion 12 at point-symmetric positions with the central axis of the main pipe 2 as the center. Yes.

  The setting groove 17 is formed in the upper portion of the movable range of the handle 3 in the handle mounting portion 12, and a ribbon-like opening / closing identification member 21 is set on the bottom thereof as shown in FIGS. . The surface of the open / close identification member 21 is formed in a color different from that of the main pipe 2 and the handle 3 and can be easily visually observed from the outside. The opening / closing identification member 21 is set on the bottom surface of the setting groove 17 by means such as sticking.

  As shown in FIG. 4, a large number of convex portions 22 and concave portions 23 are alternately formed at a fixed pitch on the end face of the attachment port 13. Further, an engagement groove 24 of the fixing band 7 is formed on the outer peripheral surface on the front end side of the attachment port 13. Furthermore, as shown in FIG. 6, a flow path regulating wall 25 is formed inside the mounting port 13, and the insertion port 11 branches off between the inner surface of the mounting port 13 and the tip of the flow path regulating wall 25. A communication channel 26 communicating with the pipe 5 is formed. The communication flow path 26 is formed at a position that is biased toward the insertion port 11 with respect to the center of the inner peripheral surface of the attachment port 13. The opening area and shape of the communication channel 26 are adjusted so that the pressure loss of the fluid flowing from the insertion port 11 to the branch pipe 5 or from the branch pipe 5 to the insertion port 11 can be reduced as much as possible.

  As shown in FIGS. 8 and 9, the handle 3 is formed in a bottomed cylindrical shape having an inner diameter that can be externally mounted on the handle mounting portion 12 of the main pipe 2. On the inner surface of the cylindrical portion, a guide protrusion 31 that is inserted into the lead groove 19 through the introduction groove 18 is provided in a symmetrical position via the central axis of the handle 3. Further, a non-slip protrusion 32 is formed on the outer surface of the cylindrical portion to make it easy for the operator to rotate the handle 3. Further, a through hole 33 is formed on the bottom surface of the handle 3 so as to pass through the tip of the valve 4, and a locking portion 34 and a spring receiving portion 35 of the valve 4 are formed around the through hole 33. Yes.

  As shown in FIG. 10, the valve 4 includes a small-diameter valve body 41 inserted into the insertion port 11, a large-diameter holding portion 42 held on the wall surface of the flow path regulating wall 25, and the handle 3. A connecting part 43 to be connected, and a stop member 45 projecting in the radial direction of the valve 4 from between the holding part 42 and the connecting part 43, and having two fan-shaped stop protrusions 44 formed opposite to each other on the outer peripheral surface; ,have. The connecting portion 43 is formed with a locking member 47 having a locking claw 46 formed outward at the lower end portion. As shown in FIGS. 2 and 3, O-rings 48 and 49 are attached to the outer circumferences of the valve body 41 and the holding portion 42, respectively.

  Hereinafter, a method for assembling the heat source machine header 1 according to the embodiment will be described.

  First, the valve 4 is inserted into the main pipe 2 in a state where the stop protrusion 44 formed on the valve 4 is aligned with the valve restricting groove 20 formed on the main pipe 2. Next, the handle 3 is attached to the outer periphery of the handle attachment portion 12 formed on the main pipe 2 so that the handle 3 can rotate and move forward and backward.

  Attachment of the handle 3 to the handle attachment portion 12 is performed in the following procedure. That is, the introduction groove 18 formed in the handle mounting portion 12 and the handle with the biasing spring 50 inserted between the stop protrusion 44 formed on the valve 4 and the spring receiving portion 35 formed on the handle 3. 3, and the handle 3 is pressed in the axial direction of the main pipe 2 to push the guide protrusion 31 into the rear side of the introduction groove 18. Second, the guide protrusion 31 is moved into the lead groove 19 by rotating the handle to the right by a slight amount.

  After the guide protrusion 31 is moved into the lead groove 19, the distal end portion of the connecting portion 43 formed on the valve 4 is inserted into the through-hole 33 formed on the bottom surface of the handle 3, and the locking claw 46 is moved to the handle. 3 is engaged with a locking portion 34 formed on the bottom surface. Thereby, the main pipe 2, the handle 3, and the valve 4 are assembled together.

  As a result, the handle 3 and the valve 4 are stably held in the open position of the communication channel 26 as shown in FIG. In this state, the opening / closing identification member 21 is not covered by the handle 3, and the opening / closing identification member 21 is visible from the outside. Further, the valve 4 is stably held by the elastic force of the biasing spring 50 that acts between the stop member 45 and the spring receiving portion 35.

  When the handle 3 is further rotated in the right direction from this state, the handle 3 and the valve 4 are integrally inserted into the main pipe 2 due to the screw feed effect acting between the inclined groove 19a of the lead groove 19 and the guide protrusion 31. The guide protrusion 31 enters the horizontal groove 19b of the lead groove 19 after moving to the mouth 11 side. Finally, the protrusion 31 of the handle 3 comes into contact with the end of the horizontal groove 19b formed on the outer peripheral surface of the handle mounting portion 12, and further rotation of the handle 3 becomes impossible. At this time, the valve body 41 of the valve 4 is fitted into the insertion port 11 and the communication flow path 26 is closed. At this time, the open / close identification member 21 is covered by the handle 3 and is not visible from the outside.

  As shown in FIG. 11A, in a state where the guide protrusion 31 is moved from the introduction groove 18 into the lead groove 19, one end 44a of the stop protrusion 44 formed on the valve 4 is formed on the main pipe 2. It abuts against one end 20 a of the valve regulating groove 20. At this time, the valve 4 is open. When the handle 3 is rotated to the right from this state, as shown in FIG. 11B, the guide projection 31 moves in the inclined groove 19a and finally reaches the horizontal groove 19b, and the valve 4 is closed. It becomes a state.

  On the contrary, when the handle 3 is rotated to the left from the closed state of the valve 4, the guide protrusion 31 enters the inclined groove 19a from the horizontal groove 19b, and finally, the stop protrusion formed on the valve 4 One end 44a of 44 abuts on one end 20a of the valve regulating groove 20 formed in the main pipe 2, and further rotation of the handle 3 becomes impossible. At this time, the guide protrusion 31 is stopped at a position where it cannot enter the introduction groove 18 as shown in FIG.

  Returning to FIG. 1 to FIG. 3, the branch pipe 5 is connected to the attachment port 13, and the connected branch pipe 5 is fixed to the attachment port 13 using the fixing band 7. As shown in FIGS. 2 and 3, the branch pipe 5 is formed in a cylindrical shape with both ends open, and a plurality of (three in the example of FIGS. 2 and 3) branch ports in the length direction. 5a, 5b and 5c are opened. The fluid flow path 51 established at the center of the branch pipe 5 distributes the fluid equally to the respective branch ports 5a, 5b, and 5c, and therefore reaches from the attachment side to the attachment port 13 to the attachment side of the charge port 6. The diameter of the taper hole decreases accordingly. On the outer surface on the attachment side to the attachment port 13, an engagement step portion 52 (see FIG. 1) having a plurality of projections and recesses meshing with the projections 22 and the recesses 23 formed on the end surface of the attachment port 13; An O-ring mounting groove 53 is formed. On the other hand, a locking groove 54 for the charge port 6 is formed on the outer surface on the mounting side of the charge port 6.

  Since the branch pipe 5 is configured as described above, the fixing band 7 is loosened, and the convex portion 22 and the concave portion 23 formed on the end surface of the attachment port 13 and the convex portion formed on the engaging step portion 52. By changing the meshing position with the recess, the mounting posture of the branch pipe 5 with respect to the main pipe 2, specifically, the direction of the branch ports 5a, 5b, and 5c can be changed. Thereby, since the direction of branch port 5a, 5b, 5c can be changed suitably according to the piping structure of branch piping, the connection operation | work of branch piping with respect to branch port 5a, 5b, 5c can be facilitated.

  As shown in FIGS. 2 and 3, the branch pipe 5 has an end on the attachment side to the attachment port 13 via an O-ring 55 attached in an O-ring attachment groove 53. And is integrally connected to the main pipe 2. Therefore, the communication channel 26 formed between the inner surface of the attachment port 13 and the tip of the channel restriction wall 25 is inserted into the insertion port 11 with respect to the fluid channel 51 opened at the center of the branch pipe 5. It is formed at a position biased to the side.

  The charge port 6 applies a test pressure to the fluid in the branch pipe 5 in order to perform a leak test on each branch pipe connected to the branch ports 5a, 5b, and 5c. The charge port 6 according to the embodiment is formed with an L-shaped tube, one end of which is connected to the branch pipe 5, and the other end of the pressure port 62 is connected to an inspection pressure generator. It has become. On the outer surface of the connecting portion 61, a locking claw 63 extending to the distal end side of the connecting portion 61 is formed. The charging port 6 is rotatably attached to the branch pipe 5 by inserting the connecting portion 61 into the branch pipe 5 and engaging the locking claw 63 with the locking groove 54 formed in the branch pipe 5. It is done. An O-ring 64 is disposed between the connecting portion 61 and the inner peripheral surface of the branch pipe 5.

  Next, the effect of the heat-source equipment header based on embodiment comprised as mentioned above is demonstrated.

  In the heat source machine header 1 according to the embodiment, the stop protrusion 44 formed on the valve 4 is abutted against the valve restriction groove 20 formed on the main pipe 2, so that the stop position of the guide protrusion 31 formed on the handle 3 is the main pipe. 2, the handle 3 is prevented from falling off the main pipe 2. In addition, the heat source machine header 1 according to the embodiment does not require the groove depth of the introduction groove 18 to be shallower than the groove depth of the lead groove 19, and therefore, when assembling the main pipe 2 and the handle 3, a special machine such as a press machine is used. No assembly is required, and the assembly work of the main pipe 2 and the handle 3 can be facilitated. Furthermore, since the heat source machine header 1 according to the embodiment does not require a special member for preventing the handle 3 from falling off the main pipe 2, the assembly of the main pipe 2 and the handle 3 can be facilitated from this point. Thus, the cost of the heat source unit header can be reduced.

  Further, the heat source machine header 1 according to the embodiment is biased to the insertion port 11 side from the center of the fluid flow path 51 formed in the branch pipe 5 between the insertion port 11 and the attachment port 13 of the main pipe 2. Since the connecting flow path 26 is formed, the overall length of the main pipe 2 can be shortened, the attachment of the heat source unit header 1 to the heat source unit can be facilitated, and the degree of freedom of the installation position of the heat source unit with respect to the floor surface can be increased. it can. Furthermore, the heat source machine header 1 according to the embodiment can form the opening height of the communication flow path 26 smaller than the opening height of the fluid flow path 51, so that the movement amount of the valve 4 for opening and closing the communication flow path 26 can be reduced. It can be made small, and the rotation operation of the handle 3 for opening and closing the valve 4 can be facilitated.

  In addition, the heat source machine header 1 according to the embodiment constitutes the branch pipe 5 so that the mounting posture with respect to the main pipe 2 can be changed, and a charge port 6 for leakage inspection is provided at the tip of the branch pipe 5. 5 so that the branch pipe 5 can always be kept downward even when the mounting posture of the branch pipe 5 with respect to the main pipe 2 is changed, so that the heat source machine, the heat source machine header 1 and the branch pipe can be maintained. It is possible to easily perform a leakage inspection of a piping system including

  In addition, the heat source machine header 1 according to the embodiment is visible from the outside when the handle 3 is rotated to the open position of the valve 4, and from the outside when the handle is rotated to the closed position of the valve 4. Since the open / close discriminating member 21 that cannot be visually checked is provided, it is possible to reliably know whether the valve 4 is in the open position or the closed position by visual inspection, and the opening / closing operation of the valve 4 can be easily and reliably performed. it can.

  In addition, in the heat source machine header 1 according to the embodiment, the introduction groove 18, the lead groove 19, the valve restriction groove 20, the stop protrusion 44, the locking portion 34, and the locking claw 46 are formed in two points symmetrically respectively. Therefore, the directionality between the members can be relaxed, the assembly of the members can be facilitated, and the operability between the members can be improved.

  The gist of the present invention is that the stop position of the guide protrusion 31 formed on the handle 3 is determined by abutting the stop protrusion 44 formed on the valve 4 against the valve restricting groove 20 formed on the main pipe 2. It is intended to restrict the position where it cannot penetrate into the introduction groove 18 formed in the above. Accordingly, the configuration of the other parts is not limited to the description of the above embodiment, and can be arbitrarily replaced with other configurations. For example, in the above embodiment, an O-ring is used as the seal member, but other seal members may be used.

  DESCRIPTION OF SYMBOLS 1 ... Heat source machine header, 2 ... Main pipe, 3 ... Handle, 4 ... Valve, 5 ... Branch pipe, 6 ... Charge port, 7 ... Fixed band, 11 ... Insertion port, 12 ... Handle attachment part, 13 ... Installation port, 14 ... O-ring storage groove, 15 ... O-ring, 16 ... Stopper, 17 ... Setting groove, 18 ... Introduction groove, 19 ... Lead groove, 19a ... Inclination groove, 19b ... Horizontal groove, 20 ... Valve regulating groove, 21 ... Opening / closing Identification member, 22 ... convex portion, 23 ... concave portion, 24 ... engagement groove, 25 ... flow path regulating wall, 26 ... communication flow path, 31 ... guide projection, 32 ... anti-slip projection, 33 ... through hole, 34 ... spring Receiving part, 41 ... valve body, 42 ... holding part, 43 ... connecting part, 44 ... stop projection, 45 ... stop member, 46 ... locking claw, 47 ... locking member, 48, 49 ... O-ring, 50 ... with Force spring 51... Fluid flow path 52. Engagement step portion 53. O-ring mounting groove 54. Locking groove 6 ... connecting portion, 62 ... pressing portion, 63 ... O-ring receiving groove, 64 ... O-ring.

Claims (4)

A main pipe attached to the heat source device, a branch pipe connected to the main pipe, a valve for opening and closing a fluid flow path formed in the main pipe, and a handle for opening and closing the valve,
The main pipe has an introduction groove of a guide protrusion formed on the handle and a lead groove following the introduction groove formed on an outer peripheral surface of the handle mounting portion, and the valve is rotated when the valve is rotated to an open position. A valve restricting groove that abuts the stop protrusion formed on the inner peripheral surface of the handle mounting portion,
The valve restricting groove is formed at a position where an end portion against which the stop protrusion is abutted when the valve is rotated to the open position cannot enter the guide protrusion into the introduction groove. Features a heat source machine header.   The main pipe has an insertion port to the heat source unit and an attachment port for the branch pipe, and the branch pipe is connected to the main pipe by inserting one end into an inner periphery of the attachment port, and the insertion The communication channel is formed between the port and the attachment port at a position that is biased toward the insertion port side from the center of the fluid channel formed in the branch pipe. The heat source machine header according to 1.   The branch pipe is configured to be capable of changing the mounting posture with respect to the main pipe, and a charge port for leakage inspection is rotatably connected to the branch pipe at a distal end portion of the branch pipe. The heat source machine header according to claim 1, wherein:   The main pipe is visible from the outside when the handle is rotated to the open position of the valve within the movable range of the handle, and when the handle is rotated to the closed position of the valve. The heat source machine header according to claim 1, further comprising an open / close identification member that is not visible from the outside.