CN2372511Y

CN2372511Y - Pipeline joint with automatic cutting device

Info

Publication number: CN2372511Y
Application number: CN 99231210
Authority: CN
Inventors: 曾立国; 邓万庥
Original assignee: Individual
Current assignee: Individual
Priority date: 1999-03-20
Filing date: 1999-03-20
Publication date: 2000-04-05
Anticipated expiration: 2009-03-20

Abstract

The utility model comprises a plinth, a coupling head, a valve, a spring, a valve sealing ring and a plinth sealing ring, wherein the plinth has a cylindrical inner cavity and the coupling head is engaged with the internal thread at the cylindrical inner cavity through the external thread at the right end of the coupling head. The center of the coupling head is provided with an inner hole, and the valve is arranged in the inner hole. The right end of the valve is provided with a flange step to limit the moving range. The valve adjacent to the flange is provided with a circle of liquid passing holes, and the spring is arranged between the valve and the right end of the cylindrical inner cavity. The valve sealing ring and the plinth sealing ring are respectively arranged at the valve and the coupling site between the coupling head and the plinth. The utility model is used for a flow passage, and can automatically cut out at the time of replacing the valve and leading out a pipe. The utility model has the advantages of simple structure and practicality.

Description

But the pipe coupling of automatic cut-off

The utility model belongs to the pipe coupling technical field

Valve is the utensil of using always.When valve damages, when needing to repair and changing, must close user's stop valve earlier, open again after repairing and changing, if do not have user's stop valve or damage, then need close the pipeline main valve, cause whole section to cut off the water, give and use maintenance to bring very big inconvenience.

But the purpose of this utility model is to provide a kind of pipe coupling of automatic cut-off.

The purpose of this utility model is to realize like this, but a kind of pipe coupling of automatic cut-off, comprise the connection block connecting head, valve, returning spring, valve seal ring and connection block seal ring connection block have cylindrical cavity and introduce the hole, introducing the hole communicates with cylindrical cavity, connection block right-hand member surface has outside thread to be connected with the introducing pipeline, and the left end of cylindrical cavity has internal thread.There is outside thread on connecting head right-hand member surface, combines with the internal thread of this outside thread with connection block cylindrical cavity left end.There is an endoporus that connects at the center of connecting head, and the left end of endoporus has internal thread to combine with the outside thread of valve and introduction pipe.Valve is a cylindrical body, its right-hand member has the flange step of diameter greater than outside diameter of cylinder, there is the obstructed valve lumen orifice of a left end opening right-hand member at the valve center, one circle liquid-through hole is arranged on the close valve cylindrical body at flange step place, liquid-through hole communicates with the valve lumen orifice, the external diameter of valve cylindrical body is slightly smaller than the internal diameter of connecting head endoporus, and valve is packed in the endoporus of connecting head, can be in endoporus left, left is to slip.The diameter of the flange step on the valve is slightly smaller than the internal diameter of connection block cylindrical cavity, and greater than the internal diameter of connecting head endoporus, with the sphere of activities of restriction valve in endoporus.Returning spring is contained between the right side and connection block cylindrical cavity right-hand member of valve, often is in compressive state.The valve seal ring is contained between valve flange step left side and the connecting head right side.The connection block seal ring is contained in the contacting point between connecting head and the connection block left side.Pipe coupling is contained on the introducing pipeline with the outside thread of its connection block right-hand member, and valve and introduction pipe are contained on the internal thread of connecting head left end with the outside thread on it.When packing valve and introduction pipe into, the valve left end in its end roof pressure pipe coupling makes its certain distance that moves right, and opens liquid chunnel.When unloading lower valve and introduction pipe, valve is because left end pressurized not, and its right-hand member promotes valve and is moved to the left under returning spring and hydraulic pressure, closes liquid chunnel.

The utility model has the advantages that, when packing valve and introduction pipe into, can open liquid chunnel automatically.When unloading lower valve and introduction pipe, can close liquid chunnel automatically.Simple in structure, convenient durable, low cost of manufacture is applicable to liquid chunnel.

Fig. 1 is a structural drawing of the present utility model, and Fig. 1 is described as follows: 1 is connection block, and 2 is connecting head, 3 is valve, 4 is returning spring, and 5 is the valve seal ring, and 6 is the connection block seal ring, 7 is the connection block cylindrical cavity, 8 is the connecting head endoporus, and 9 is the flange step, and 10 is the valve lumen orifice, 11 is liquid-through hole, and 12 for introducing the hole.

An embodiment of the present utility model, in conjunction with the accompanying drawings 1 its structure is described and annexation as follows: connection block 1 has cylindrical cavity 7 and introduces hole 12, introduces hole 12 and communicates with cylindrical cavity 7, and connection block 1 right-hand member surface has outside thread to be connected with the introducing pipeline.Connecting head 2 combines with the internal thread of connection block cylindrical cavity 7 left ends with the outside thread on its right-hand member surface.There is an endoporus 8 that connects at the center of connecting head 2, and the internal thread of endoporus left end combines with the outside thread of valve and introduction pipe.Valve 3 is cylindrical bodys, its right-hand member has the flange step 9 of diameter greater than the cylindrical body external diameter, there is the obstructed valve lumen orifice 10 of a left end opening right-hand member at the center of valve 3, on the close valve cylindrical body of flange step 10, there is a circle liquid-through hole 11 to communicate with valve lumen orifice 10, valve 3 cylindrical body external diameters are slightly smaller than the internal diameter of connecting head endoporus 8, valve 3 is packed in the joint endoporus 8, can be therein left, right slides.Valve flange step 9 diameters are slightly smaller than the internal diameter of connection block cylindrical cavity 7, and greater than the internal diameter of connecting head endoporus 8, with the sphere of activities of restriction valve 3.Returning spring 4 is contained between valve 3 right sides and connection block cylindrical cavity 7 right-hand members, often is in compressive state.Valve seal ring 5 is contained between valve flange step 9 left sides and connecting head 2 right sides.Connection block seal ring 6 is contained in the contacting point between connecting head 2 and connection block 1 left side.Pipe coupling is contained on the introducing pipeline with the outside thread of its connection block right-hand member, and valve and introduction pipe are contained on the internal thread in connecting head hole with the outside thread on it.

Claims

But 1, a kind of pipe coupling of automatic cut-off is characterized in that comprising connection block (1), connecting head (2), valve (3), returning spring (4), valve seal ring (5) and connection block seal ring (6); Connection block (1) has cylindrical cavity (7) and introducing hole (12), introducing hole (12) to communicate with cylindrical cavity (7), and connection block (1) right-hand member surface has outside thread to be connected with the introducing pipeline; Connecting head (2) combines with the internal thread of connection block cylindrical cavity (7) left end with the outside thread on its right-hand member surface; There is an endoporus (8) that connects at the center of connecting head (2), and endoporus (8) left end has internal thread to combine with the outside thread of valve and introduction pipe; Valve (3) is a cylindrical body, its right-hand member has the flange step (9) of diameter greater than the cylindrical body external diameter, there is the obstructed valve lumen orifice (10) of a left end opening right-hand member at the center of valve (3), on valve (3) cylindrical body of locating near flange step (9), there are a circle liquid-through hole (11) and valve lumen orifice (10) logical, the external diameter of valve (3) cylindrical body is slightly smaller than the internal diameter of connecting head endoporus (8), valve (3) is packed in the connecting head endoporus (8), can be therein left, right slides; The diameter of the flange step (9) of valve (3) is slightly smaller than the internal diameter of connection block cylindrical cavity (7), and greater than the internal diameter of connecting head endoporus (8), with the sphere of activities of restriction valve (3); Returning spring (4) is contained between the right-hand member of the right side of valve (3) and connection block cylindrical cavity (7), often is in compressive state; Valve seal ring (5) is contained between the right side of the left side of valve flange step (9) and connecting head (2), and connection block seal ring (6) is contained in the contacting point between the left side of connecting head (2) and connection block (1).