CN2298429Y - Liquid on-off device without float valve and water tank - Google Patents

Abstract

The utility model discloses a liquid on-off device without float valve and water tank. The utility model is characterized in that the hot water pipes in full automatic fuel and gas burning normal-pressure boiler systems are provided with circulating pumps and unidirectional valves; one end of circulating water pipes is connected to hot water pipes between the circulating pumps and the unidirectional valves; the other end of the circulating water pipes is communicated with the upper cavity of piston type opening and closing valves through stop valves. The sealing rings of the piston type opening and closing valves are changed into double sealing rings. The utility model cancels the float valve and the water tank of the prior art and has the advantages of reduced cost, convenient transportation, convenient installation, reliable performance, and long service life.

Description

Need not the liquid headstock gear of ball-cock assembly and water tank

The utility model relates to the liquid headstock gear in the fully automatic fuel-oil gas normal-pressure boiler system, particularly a kind of liquid headstock gear that need not ball-cock assembly and water tank.

At present, liquid headstock gear on the market in the popular fully automatic fuel-oil gas normal-pressure boiler system, realize automatic control with ball-cock assembly and water tank are supporting mostly, because ball-cock assembly is impacted by backwater at work and the variation of operating mode is difficult to stablize, it is too much that piston type opens and closes the reciprocating number of times of valve in decompression process, cause the single ring wear on it to accelerate, time one is long, piston type opens and closes valve and just be difficult to bear the pressure of high rise building heating system when decompression, and its circling water flow rate is wayward, also can produce leakage, cause system's cisco unity malfunction, and supporting with it break pressure cistern volume is big, and the material that consumes during manufacturing is many, and is difficult for installing.

The purpose of this utility model provides a kind of liquid headstock gear that need not ball-cock assembly and water tank, to solve the weak point that exists in the fully automatic fuel-oil gas normal-pressure boiler system.

The technical solution of the utility model is achieved like this: the liquid headstock gear that need not ball-cock assembly and water tank, its structure is that water inlet pipe is communicated with total return pipe by gate valve, total return pipe one end is communicated with boiler, the other end is communicated with the side chamber that piston type opens and closes valve by resistance control valve, hot-water line passes through flow control valve, stop valve is communicated with radiator, radiator is communicated with return pipe, return pipe one end is communicated with water inlet pipe, the other end is communicated with the cavity of resorption that piston type opens and closes valve by stop valve, it is characterized in that on hot-water line, being provided with circulating pump and check valve, and an end of circulating water pipe is connected on the hot-water line between circulating pump and the check valve, and the other end is communicated with the epicoele that piston type opens and closes valve by stop valve; Piston type opens and closes valve to be made up of valve body and valve gap, between valve body and the valve gap sealing gasket is arranged, and connects with screw bolt and nut between the two; The piston rod that two ends have internal thread is contained in the valve body, there are piston and upper press cover in the upper end of piston rod by bolting, be with interior cover on the piston, there is the double density seal both sides of interior cover, there are fairlead, interior pad and lower cover in the lower end of piston rod by bolting, in the cavity of resorption of valve body, by spring abutment stage clip is housed, the upper end of stage clip contacts with lower cover.

The course of work of the present utility model is such: start circulating pump, water enters the epicoele that piston type opens and closes valve by circulating water pipe, promotes descent of piston, stage clip is compressed, at this moment, the cavity of resorption that piston type opens and closes valve is communicated with the side chamber, at this moment, backwater in the system advances from the cavity of resorption that piston type opens and closes valve, the side chamber goes out, flows in the boiler through total return pipe, and the water of boiler heating, under the effect of circulating pump, deliver to radiator and use again with heating.When circulating pump quits work, the upper cavity pressure of piston type keying valve is die-offed, piston is up under stage clip and pressure of return water effect, make piston type open and close not conducting between the cavity of resorption of valve and the side chamber, and the check valve on the hot-water line stops backwater to flow backwards through hot-water line, like this, just closed the water return loop of whole system, make the pressure and the water yield that have kept certain in the return water system, thereby reach ball-cock assembly and water tank in both cancellation systems, purpose that again can operate as normal, the utility model compared with prior art has the following advantages:

1, is not subjected to the control of cistern water level in the heating water return system;

2, after the sealing ring on the piston of piston type keying valve changed the double density seal into, dependable performance did not have leakage during duty, and the life-span is long;

3, reduced product cost, be convenient to transportation, install.

Fig. 1 is a structural representation of the present utility model;

Fig. 2 opens and closes the structural representation of valve for the utility model piston type;

Below in conjunction with accompanying drawing embodiment of the present utility model is further described.

Need not the liquid headstock gear of ball-cock assembly and water tank, its structure is that water inlet pipe (34) is by gate valve (6), (2) be communicated with total return pipe (36), total return pipe (36) one ends are communicated with boiler (1), the other end is communicated with the side chamber (28) that piston type opens and closes valve (4) by resistance control valve (3), hot-water line (33) is by flow control valve (9), stop valve (12), check valve (11), circulating pump (10) is communicated with radiator (5), radiator (5) is communicated with return pipe (37), return pipe (37) one ends are communicated with water inlet pipe (34), the other end is communicated with the cavity of resorption (27) that piston type opens and closes valve (4) by stop valve (7), one end of circulating water pipe (35) is connected on the hot-water line (33) between circulating pump (10) and the check valve (11), and the other end is communicated with by the epicoele (32) of stop valve (8) with piston type keying valve (4); Piston type opens and closes valve (4) to be made up of valve body (29) and valve gap (14), between valve body (29) and the valve gap (14) sealing gasket (15) is arranged, and uses bolt (17) to be connected with nut (13) between the two; The piston rod (20) that two ends have internal thread is contained in the valve body (29), the upper end of piston rod (20) is fixed with piston (19) and upper press cover (16) by bolt (18), be with interior cover (30) on the piston (19), there is double density seal (31) both sides of interior cover (30), the lower end of piston rod (20) is fixed with fairlead (21), interior pad (23) and lower cover (24) by bolt (22), in the cavity of resorption (27) of valve body (29), be contained in stage clip (25) by spring abutment (26), the upper end of stage clip (25) contacts with lower cover (24).

Claims (1)

1, need not the liquid headstock gear of ball-cock assembly and water tank, its structure is: water inlet pipe (34) is by gate valve (6), (2) be communicated with total return pipe (36), total return pipe (36) one ends are communicated with boiler (1), the other end is communicated with the side chamber (28) that piston type opens and closes valve (4) by resistance control valve (3), hot-water line (33) is by flow control valve (9), stop valve (12) is communicated with radiator (5), radiator (5) is communicated with return pipe (37), return pipe (37) one ends are communicated with water inlet pipe (34), the other end is communicated with the cavity of resorption (27) that piston type opens and closes valve (4) by stop valve (7), it is characterized in that on hot-water line (33), being provided with circulating pump (10) and check valve (11), and an end of circulating water pipe (35) is connected on the hot-water line (33) between circulating pump (10) and the check valve (11), and the other end is communicated with by the epicoele (32) of stop valve (8) with piston type keying valve (4); Piston type opens and closes valve (4) to be made up of valve body (29) and valve gap (14), between valve body (29) and the valve gap (14) sealing gasket (15) is arranged, and uses bolt (17) to be connected with nut (13) between the two; The piston rod (20) that two ends have internal thread is contained in the valve body (29), the upper end of piston rod (20) is fixed with piston (19) and upper press cover (16) by bolt (18), be with interior cover (30) on the piston (19), there is double density seal (31) both sides of interior cover (30), the lower end of piston rod (20) is fixed with fairlead (21), interior pad (23) and lower cover (24) by bolt (22), in the cavity of resorption (27) of valve body (29), be contained in stage clip (25) by spring abutment (26), the upper end of stage clip (25) contacts with lower cover (24).

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