JPH0718166U - Expansion water discharge device - Google Patents

Abstract

(57) [Summary] [Structure] A trap 22 is connected to the drain main 20, and a cap 23 is screwed onto the upper end of the trap 22. The small cylinder portion 30 of the cap 23 is inserted into the trap 22, and the outer peripheral surface of the small cylinder portion 30 is separated from the inner peripheral surface of the upper end of the trap 22. [Effect] The expansion water of the stop-type electric water heater flows from the hose 26 into the cap 23 and is discharged from the small cylinder portion 30 to the trap 22. The outer peripheral surface of the small tube portion 30 is the trap 22.
Since it is separated from the inner peripheral surface of the upper end of the cap 23, the water flowing into the cap 23 flows into the trap 22 without making any contact with the screwing surface with the trap 22. Therefore, leakage of water from the screwed surfaces of both is prevented.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to an expansion water discharge device for discharging expansion water from a stop-type electric water heater to a drain main, and in particular, an expansion water discharge improved to prevent water leakage from near the hose connection port. Regarding the device.

[0002]

[Prior art]

 In a stop-type electric water heater, when the stored water expands in volume as the temperature of the stored water rises, this expanded water is discharged to the drain main.

This expanded water discharge device will be described below with reference to a conventional (for example, Japanese Utility Model Publication No. 3-20695) washbasin with a stop type electric water heater.

As shown in FIG. 4, the front stop type electric water heater 1 has a canister (not shown) equipped with an electric heater (not shown) in an outer case 1 a, and the canister has an inlet pipe 7 provided therein. A tap pipe 8 and a drain pipe 9 are connected. A water supply pipe 11 is connected to the water supply pipe 7 via a pressure reducing valve 10, and an extension pipe 13 leading to a water supply connection port of a faucet 12 is connected to the water supply pipe 7.

The hot water outlet pipe 8 is connected with a relief valve 2 for discharging expanded water, and an extension pipe 14 leading to a hot water supply connection port of a faucet 12.

A hose 5 for discharging expanded water is arranged between the relief valve 2 and the drain main 4 of the washbasin. The upstream end of this hose 5 is connected to a water receiving member 6 which is open to the atmosphere. The downstream end of the hose 5 is connected to a trap 16 connected to the drain main 4. A check valve mechanism is provided at the upstream end of the trap 16.

The water receiving member 6 is provided at the tip of the expansion water outlet of the relief valve 2, and has a discharge port 6a that opens downward to the atmosphere, and a hopper-shaped expansion water receiver that is arranged below the discharge port 6a. It consists of the mouth 6b.

As shown in FIG. 5, the trap 16 has a discharge port 16 a connected to the drain main pipe 4. The check valve 17 includes a cylindrical cap 17A on which the hose 5 is fitted, a spherical float valve 17a inserted into the cap 17A, which is lighter than water, and a float valve 17a when the trap 16 reversely flows. A valve seat 17b on which is seated and a stopper 17c for preventing the float valve 17a from escaping. The cap 17A is fixed to the trap 16.

Next, the flow of expansion water of the front stop type electric water heater of this washbasin will be described.

The expansion water generated due to the temperature rise of the stored water in the stop-type electric water heater 1 flows through the relief valve 2 from the discharge port 6 a to the expansion water receiving port 6 b, and then flows through the hose 5. , Through the check valve 17 and the trap 16 to be discharged to the trap downstream side portion 4a of the drainage main 4.

The water receiving member 6 that opens to the atmosphere and the check valve 7 are for preventing backflow from the drain main 4 side to the pre-stop type electric water heater 1. In this case, even if the wastewater in the drainage main 4 flows back into the hose 5 of the expansion water drainage channel 5 due to a malfunction of the check valve 17 or the blockage of the drainage main 4, the sewage expands. It never overflows from the water receiving port 6b and does not flow back into the pre-stop electric water heater 1.

[0012]

[Problems to be solved by the device]

 In the above-described conventional expansion water discharge device, it is preferable that the cap 17A is attachable to and detachable from the trap 16 so that the check valve 17 can be inspected and repaired. For that purpose, it is conceivable to screw the cap 17A onto the trap 16.

However, when the cap 17A is screwed to the trap 16 in this way, if the cap 17A is tightened a little, water may leak from the screwing surface by capillary action.

[0014]

[Means for Solving the Problems]

 The expansion water discharge device of the present invention comprises a drainage main, an expansion water trap connected in a branched shape in the middle of the drainage main, and a hose connection port provided upward at the upstream end of the trap. A check valve provided inside the upstream end, the hose connection port being provided at the upper end, and a cylindrical cap extending in the vertical direction provided separately from the trap, In the expansion water discharge device in which the cap is connected to the trap, a small tube portion that enters the inside of the upper end of the trap is provided inside the lower portion of the cap, and the entire upper end of the small tube portion is continuous with the inner surface of the cap. The outer peripheral surface of the small tubular portion is separated from the inner surface of the upper end of the trap.

[0015]

[Action]

 In the expansion water discharge device of the present invention, the expansion water flowing from the hose into the cap is transmitted along the inner surface of the small cylinder and drops like dripping from the lower end of the small cylinder. The outer peripheral surface of this small tube is separated from the inner surface of the upper end of the trap. Therefore, the expanded water in the cap flows into the trap without making any contact with the screwing surface between the cap and the upper end of the trap. As a result, even if the cap is loosely tightened in the trap, no water will leak out.

[0016]

【Example】

 Embodiments will be described below with reference to the drawings. FIG. 1 is a vertical cross-sectional view showing an expanded water discharge device according to an embodiment, FIG. 2 is an enlarged cross-sectional view of an essential part of the device, and FIG. 3 is a cross-sectional view taken along line II-III of FIG. is there. It should be noted that in order to clarify the drawing, the float valve constituting the check valve is not shown in FIG.

This expanded water discharge device includes a drain main 20, a trap 22 connected to the drain main 20 so as to be connected to an opening 21 in the middle of the drain main 20, and an upstream end of the trap 22. It is mainly composed of a cap 23 that is screwed into the cap 23 and a check valve float valve 24 that is inserted into the cap 23.

A hose connection port 25 is provided at the upper end of the cap 23, and the downstream end of the hose 26 is inserted into the cap 23 and mounted. A flange portion 27 protruding outward from the lower end portion of the cap 23 is provided, and a nut portion 28 is vertically provided downward from the outer peripheral edge of the flange portion 27.

A male screw is provided on the outer peripheral surface of the upper end of the trap 22, and the nut portion 28 is screwed into the male screw. A packing 29 is interposed between the upper end surface of the trap 22 and the lower surface of the collar portion 27.

At the lower end of the cap 23, a small tube portion 30 is projected downward so as to enter the upper end of the trap 22. The outer peripheral surface of the small tube portion 30 is separated from the inner peripheral surface of the upper end of the trap 22.

The float valve 24 is vertically movably inserted into the cap 23, and a ring-shaped packing 31 is attached to the upper end of the float valve 24. The packing 31 can be seated on a seat surface 32 formed by recessing the upper end of the cap 23.

A constricted portion 33 is provided on the upper portion of the trap 22 to prevent the float valve 24 from falling into the trap 22. A rib 34 is provided on the outer peripheral surface of the float valve 24 in the vertical direction.

In the expansion water discharge device configured as described above, the expansion water flowing from the hose 26 into the cap 23 flows down from the inner surface of the cap 23 into the trap 22 along the inner surface of the small tube portion 30, Eventually, it flows into the drain main 20. Since the small cylinder portion 30 projects into the trap 22 and is separated from the inner peripheral surface of the upper end surface of the trap 22 of the small cylinder portion 30, the expansion water is separated from the trap 22 and the nut portion 28. It flows into the trap 22 without touching the screwing surface. Therefore, even if the cap 23 is loosely tightened to the trap 22, water never leaks from the screwing surface to the outside. Further, even if the packing 29 is deteriorated or damaged, no water leaks.

When water flows back from the drain main 20, the float valve 24 rises and the packing 31 is seated on the seat surface 32 to prevent the backflow.

[0025]

[Effect of device]

 As described above, according to the expelled water discharge device of the present invention, the water that has flowed into the cap flows into the trap without making any contact with the screwing surface between the cap and the trap. Water is surely prevented from leaking from the screwed surface with.

[Brief description of drawings]

FIG. 1 is a vertical cross-sectional view showing an expanded water discharge device according to an embodiment.

FIG. 2 is an enlarged cross-sectional view of a main part of the expanded water discharge device according to the embodiment.

FIG. 3 is a sectional view taken along line III-III in FIG.

FIG. 4 is a perspective view of a sink with a stopper type electric water heater showing an expansion water discharge device according to a conventional example.

FIG. 5 is a vertical cross-sectional view of an expanded water discharge device according to a conventional example.

[Explanation of symbols]

 20 Drain Main 22 Trap 23 Cap 25 Hose Connection 27 Collar 28 Nut 30 Small Tube

Claims (1)

[Scope of utility model registration request] 1. A drainage main pipe, an expansion water trap connected in a branched shape in the middle of the drainage main, a hose connection port provided upward at an upstream end of the trap, and an upstream end of the upstream end of the trap. A check valve provided in the interior of the trap, the hose connection port being provided at the upper end, and a cylindrical cap extending in the vertical direction provided separately from the trap. In the expansion water discharge device connected to the cap, a small cylinder portion that enters the inside of the trap upper end is provided inside the lower portion of the cap, and the entire circumference of the upper end of the small cylinder portion is continuous with the inner surface of the cap. The expanded water discharge device is characterized in that the outer peripheral surface is separated from the inner surface of the upper end of the trap.