Boiler drain valve structure

TWM688214UActive Publication Date: 2026-10-01TSANGKUO INDAL
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Patent Information

Application Number
TW115206076
Authority / Receiving Office
TW · TW
Patent Type
Utility models
Current Assignee / Owner
Filing Date
2026-06-30
Publication Date
2026-10-01
Estimated Expiration
2036-06-29

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    Figure TWG2TB001914484_003
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Abstract

A boiler drain valve structure includes a drain valve for use in conjunction with a pipeline. The drain valve has a drain valve body with an external thread on its surface and a main shaft protruding from its center. The bottom end of the main shaft has a recessed mounting groove with a water-stop pad inside the mounting groove. A screw fastener passes through the water-stop pad and is screwed to the main shaft to fix the water-stop pad. A water-stop bushing is provided outside the main shaft, and a sealing gasket is provided inside the water-stop bushing. A valve handle is fixed at the top end of the main shaft for rotating the main shaft. The pipeline has an inflow channel, an outflow channel, and a valve section. The valve section communicates with the outflow channel and the inflow channel. The valve section has an internal thread and an external thread for threaded engagement. The outer side of the valve section is combined with the water-stop bushing, and the water-stop pad can be used to block the inflow channel.
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Claims

1. A boiler drain valve structure, comprising a drain valve for use in conjunction with a pipeline, wherein: The drain valve has a drain valve body with an external thread on its surface and a main shaft protruding from its center. A mounting groove is recessed at the bottom of the main shaft, and a water-stop pad is disposed within the mounting groove. A screw fastener passes through the water-stop pad and is screwed onto the main shaft to fix the water-stop pad. A water-stop bushing is disposed outside the main shaft, and a sealing gasket is disposed inside the water-stop bushing. A valve handle is fixed to the top of the main shaft for rotating the main shaft. The pipe has an inflow channel, an outflow channel, and a valve section. The inflow channel has a through-hole. The valve section communicates with the outflow channel and the through-hole. An internal thread in the valve section engages with the external thread. The outer side of the valve section is combined with the water-stop bushing, allowing the sealing gasket to abut against the valve section opening and the main shaft to increase sealing. The water-stop pad can be used to block the through-hole.

2. The boiler drain valve structure as described in claim 1, wherein, The top end of the main shaft is screwed with a stop above the valve handle.

3. The boiler drain valve structure as described in claim 1, wherein, The drain valve is equipped with a plurality of gaskets.

4. The boiler drain valve structure as described in claim 1, wherein, A polygonal locking hole is provided in the center of the valve handle. The surface of the spindle is flattened to form a plurality of locking surfaces. Each locking surface engages with the inner side of the locking hole to secure the valve handle to the spindle.

5. The boiler drain valve structure as described in claim 1, wherein, The outer side of the valve section is combined with the water-stop bushing in a spiral fit.