JPH0114846Y2 - - Google Patents

Description

[Detailed description of the invention] [Field of industrial application] The present invention provides a hot water tap connection in which a hot water tap of a water heater is provided to protrude outside the main body case, and a faucet pipe is rotatably connected to the tip of the hot water tap. Part 1 relates to a mounting structure for a hot water outlet pipe of a water heater for fixing the hot water outlet pipe to a main body case of the water heater.

[Conventional technology]

Conventionally, those illustrated in FIGS. 1 and 2 have been generally used. That is, in the example shown in FIG. 1, a metal joint 11' is fixed to the tip of a hot water outlet pipe 3' by soldering or brazing in the body case 1' of the water heater, and the joint 11' is attached to a flange. 8' to the inside of the main body case 1', fit the faucet pipe 5' into the insertion hole made in the joint 11', and screw the cap nut 12' onto the male thread carved on the outer periphery of the joint 11'. Since the faucet pipe 5' is attached to the hot water outlet pipe 3', soldering or brazing is required.
Since the faucet pipe 5' is attached to the faucet pipe 1', there is a drawback that the cap nut loosens as the faucet pipe rotates, causing water leakage. In addition, the example shown in Fig. 2 is the outlet pipe 3'
The tip part 4' of the main body case 1' is made to protrude from the main body case 1', and the joint 11' is fitted into the outlet pipe 3' so as to be freely rotatable.
A faucet pipe 5' is attached to the joint 11' with a cap nut 12', and the outlet pipe 3' only seals the gap between the main body case 1' and the outlet pipe 3' with a flexible rubber packing 13'. Since it is not fixed to the main body case 1', when force is applied to the hot water tap when the faucet pipe 5' rotates, it will shift, causing expansion and contraction and bending stress to the hot water tap 3' and the attachment part to the heat exchanger. There are disadvantages.

[Purpose of invention]

In view of the above points, the present invention aims to reduce the cost of the product by eliminating soldering or brazing, and also securely fixes the hot water tap to the main body case so that hot water can be tapped by the force applied when the faucet pipe rotates. The purpose of this is to prevent stress such as bending from being applied to the attachment portion between the tube and the heat exchanger.

[Structure of the idea]

In the present invention, a hot water tap is inserted into a through hole drilled in the main body case of a water heater, the tip of the hot water pipe is made to protrude outside the main body case, a joint is rotatably fitted into the tip, and a faucet pipe is inserted into the joint. The faucet pipe is rotatably attached by screwing the cap nut provided at the tip of the tap, and an engaging protrusion is formed near the through hole of the hot water outlet pipe, and the engaging protrusion is connected to the hot water outlet pipe. The hot water outlet pipe is fixed by fitting the engagement recess of the pusher which has a groove for detaching and removing the pusher, and holding the pusher between the holding flange and the main body case.

[Effect]

With the above configuration, the faucet pipe is rotatably attached to the hot water tap by screwing a cap nut onto the joint that is rotatably fitted into the hot water tap, and the hot water tap is formed near the through hole. The pusher is fitted by pushing the split groove of the pusher open on the outer periphery of the engagement protrusion, and the pusher is held between the presser flange and the main body case, and the presser flange is attached to the main case, and the hot water outlet pipe is closed. Fix it to the main body case.
As a result, when the faucet pipe is rotated in any direction as the water heater is used, the hot water tap does not shift even if force is applied to the hot water tap in the vertical and lateral directions.

〔Example〕

Hereinafter, one embodiment of the present invention will be described based on the drawings.

Figure 3 shows the hot water outlet pipe connection part of a water heater. 1 is the main body case of the water heater, and a through hole 2 is bored in the lower wall of the main body case 1, and the through hole 2 is used for heat exchange. A hot water tap 3 for dispensing hot water heated in a vessel is inserted,
The tip portion 4 is provided to protrude outside the main body case 1. An engagement protrusion 6 that engages an engagement groove 7d of a bush 7, which will be described later, is formed at a position close to the through hole 2 of the tapping pipe 3, and this engagement protrusion 6
It has a split groove 7c on the outer periphery for attachment/detachment to the hot water tap 3 (see Fig. 4), and is fitted in the lower part so as to tightly fit into the gap between the through hole 2 of the main body case 1 and the hot water tap 3. A stepped portion 7a is provided, and a presser flange 8, which will be described later, is provided at the upper part.
The bush 7 is provided with an engaging stepped portion 7b that engages the
is attached to the hot water outlet pipe 3 by fitting the engagement groove 7d formed on its inner surface into the engagement protrusion 6. The collar 8a of the presser flange 8 is engaged with the engagement step 7b of the bush 7, and the base of the presser flange 8 is tightened with a screw 9 to lock the engagement step 7b of the bush 7.
and the main body case 1 and are clamped and pressed to fix the hot water pipe 3 to the main body case 1 through the bushing 7. Reference numeral 10 denotes a locking portion formed in a bulge at the tip 4 of the tapping pipe 3,
The locking portion 10 and the bush 7 are connected to the outer periphery of the hot water tap 3.
A male thread is carved on the outer periphery between the joint 11 and the joint 11 is rotatably fitted. In order to fit the tapping pipe 3 into the center of the joint 11, a groove 11a that is slightly wider than the diameter of the tapping pipe 3 is formed in the radial direction.
Protrusions 11b for preventing the tapping pipe 3 from coming off are formed at positions close to the tapping pipe 3 on both sides of a. 11c
is a cut groove for pushing out the split groove 11a and making it easier for the tap 3 to pass through the protrusion 11b when the tapped pipe 3 is inserted into the split groove 11a of the joint 11 and pushed into the center. Further, reference numeral 11d denotes a grip groove formed on the outermost periphery of the joint 11. Reference numeral 12 denotes a cap nut into which the tip of the faucet pipe 5 is inserted and locked, and by screwing it onto the male screw of the joint 11, the faucet pipe 5 connects to the hot water outlet pipe 3 as described later.
It is rotatably attached to via a joint 11.

With the above configuration, the tapping pipe 3 is pushed into the split groove 7c of the bushing 7, and the bushing 7 is fitted onto the outer periphery of the engagement protrusion 6 of the tapping pipe 3, and the fitting stepped portion 7a of the bushing 7 is inserted into the through hole 2 of the main body case 1. The presser flange 8 is engaged with the engagement stepped portion 7b, and the base of the flange 8 is screwed into the main body case 1 with screws 9, and the tip of the hot water outlet pipe 3 is inserted into the gap between the is pressed tightly against the main body case 1 in the axial direction and fixed. Then, the cap nut 12 is screwed into the joint 11, and the peripheral surfaces of the hot water outlet pipe 3 and the faucet pipe 5 are sealed with an O-ring 13, and the tip flange portion 5a of the faucet pipe 5 is pressed tightly against the end face of the joint 11. By integrating the faucet pipe 5 and the joint 11, the faucet pipe 5 and the joint 11 can be freely rotated and attached to the hot water outlet pipe 3.

[Effect of idea]

As described above, according to the present invention, an engaging protrusion is formed on the tapping pipe, a bushing is fitted into the outer periphery of the engaging protruding thread, and the bushing is clamped and fixed to the main body case by the holding flange. is securely fixed to the main body case in the axial direction, so even if vertical force is applied to the hot water tap when turning the faucet pipe, the hot water tap will not shift and move vertically and horizontally. Even if a directional force is applied, no large stress will be exerted on the attachment part of the tapping pipe to the heat exchanger. Also,
Since soldering or brazing is not required, the product can be provided at low cost. Furthermore, since the joint and the cap nut of the faucet pipe rotate together, there is no fear that the faucet pipe will come loose and come off.

[Brief explanation of the drawing]

1 and 2 are cross-sectional views showing the mounting structure of a hot water outlet pipe in a conventional water heater, and FIG. 3 is a cross-sectional view showing the mounting structure of a hot water tap in a water heater according to the present invention.
FIG. 4 is a plan view of the pushbutton, and FIG. 5 is a plan view of the joint. DESCRIPTION OF SYMBOLS 1... Main body case, 2... Through hole, 3... Hot water outlet pipe, 4... Tip of hot water outlet pipe, 6... Engagement protrusion, 7
...button, 7c...dividing groove, 7d...engaging groove, 8...presser flange.

Claims (1)

[Scope of utility model registration request] The hot water outlet pipe 3 is inserted into the through hole 2 made in the main body case 1 of the water heater so that its tip 4 projects outside the main body case 1, and the joint 11 is rotatably fitted into the tip 4. A cap nut 12 provided at the tip of the faucet pipe 5 is screwed onto the joint 11 to rotatably attach the faucet pipe 5, and an engaging protrusion 6 is formed near the through hole 2 of the hot water tap pipe 3. , an engagement concave line 7d of the bush 7, which has a groove 7c on the engagement convex line 6 for attachment and detachment to the hot water tap 3;
A hot water outlet pipe mounting structure characterized in that the hot water outlet pipe 3 is fixed by fitting the bush 7 between the holding flange 8 and the main body case 1.