Abstract: A concealed sprinkler head cover adjusting device includes a valve body formed with a flow channel therein. Both sides of the valve body are formed with an opposing bar along the axial direction of the flow channel. A shell is clamped on the opposing bars and is formed with a first accommodating space. A bottom cover is fixed to the bottom of the shell and is inwardly concaved formed a second accommodating space. A restriction site is formed on the outer wall of the opposing bars along the axial direction of the flow channel, both sides of the shell are symmetrically formed with a guiding part and a plurality of clamping parts, and the guiding parts guide the opposing bars to allow the clamping parts adjust the clamping position on the restriction site, thereby adjusting the position of the valve body in the first and second accommodating spaces.

Abstract: A valve control device for fire-extinguishing piping includes a deluge valve whose water-pressure control chamber is connected to a water inlet manifold and a water outlet manifold. The water outlet manifold has an adjustable-pressure valve, a constant-pressure valve, and a switch valve. The water inlet manifold guides fire-extinguishing water to the water-pressure control chamber for pressure accumulation. The water outlet manifold guides the fire-extinguishing water in the water-pressure control chamber to the water outlet passage. The water outlet manifold controls when the fire-extinguishing water is discharged using the switch valve. The constant-pressure valve performs first water-pressure control on the fire-extinguishing water in the water-pressure control chamber and in the water outlet manifold.

Abstract: A concealed fire sprinkler includes a main body, an arm extending along the main body and a receiving slot formed on the arm. A bottom cover is fixed by the arm at bottom of the main body. An elastic component is received in the receiving slot. Two ends of the elastic component contact with the arm and the bottom cover. Accordingly, the conventional problems that the temperature sensing speed of concealed fire sprinklers is not capable of increasing rapidly can be solved.

Abstract: A concealed fire sprinkling head having a decorating fastened structure comprising a sprinkling head at both sides of which a rib is formed, and a fastening slot being respectively formed at an outer wall of the rib; a sheet-like fastening piece at a center of which a passing hole for extending and passing through the sprinkling head, a guiding groove being symmetrically formed at an inner side of the passing hole, a clip hook being formed in the guiding groove, the rib being guided by the guiding groove for fastening in the fastening slot by the clip hook, and at least two tongue strip-like legs being formed at a periphery of the fastening piece; and a cup-like decorating cover adhered to a bottom of the fastening piece via the legs. Thus, a problem saying a structure of the fastening piece is too complex is solved.

Abstract: A fire sprinkler comprises a water supply pipe, a valve body, a heat-activated glass bulb, and a covering means. The valve body defines a passage having an inlet and an outlet at two ends thereof, wherein the inlet of the passage is connected with the water supply pipe. The heat-activated glass bulb is mounted in the valve body, wherein the heat-activated glass bulb is capable of closing the outlet of the passage when in normal condition. The covering means is arranged at a periphery of the valve body, wherein the covering means defines at least one through hole that facilitates the hot air generated in a fire emergency to contact the heat-activated glass bulb. With the fire sprinkler, the temperature response capability of the heat-activated glass bulb can be increased.

Abstract: A fire sprinkler includes a valve body and a protective shell. The valve body defines therein an orifice being normally fitted with a cap. The valve body is provided with two opposing bars extending downwardly from two sides thereof to form a frame that supports a heat-activated glass bulb engaged between the cap and a bottom of the frame. The protective shell can be mounted to the opposing bars to surround the glass bulb. Each of the opposing bars is provided with a stop portion. The protective shell is provided with two opposing guide portions and two opposing engagement portions, wherein each guide portion of the protective shell receives one of the opposing bars to allow the engagement portions of the protective shell to be engaged with the stop portions of the opposing bars. It allows the protective shell to be mounted to the valve body more securely.