Technical field Pipe valve is the water supply system joints, plugs and shut-off valve functions combined into one can be used as a plug for hydraulic test, buried without having to be removed, but also as a pipe and tap or other water Equipment connection, but also as an automatic stop valve for easy wearing parts (such as faucets, water purifiers) to replace or disassembly. BACKGROUND OF THE INVENTION At present, most of the indoor water supply pipes in a house are concealed. Before the pipeline is concealed, the parts to be installed with water faucets are plugged with plugs to withstand the pressure test. After passing the tests, the pipes are hidden and only the plugs are exposed on the wall. Developers or households at the end of the basic renovation, the plug removed, by rotating the tap to make it connected with the water pipe. At this time, due to time, materials, construction and other reasons, the plug is not easy to remove, often using some mandatory way to remove, so that the pipeline, especially on the interface part of a greater damage. Because it is buried, the renovation of the basic end of the rework brought greater difficulty and economic losses, reluctantly reluctantly use the pipe interface parts seepage, inevitable, there will be common wall paint discoloration, foaming, falling, with The molds that come into contact with the board, the board lacquered. When the faucet is damaged, it needs to be closed after the closing valve is closed. When the damaged faucet is removed, the water in the water pipe will be lost, and the rest of the piping system will be dry. After the faucet is re-installed, After the valve can be used only water, but also caused the loss of time, if it is high-rise or public places, resulting in time loss, inconvenient living, water resources will be more waste. The technical scheme is composed of an outer pipe, a core column and a sealing ring, wherein the outer pipe and the core column are made of hard materials and the sealing ring is made of elastic material; the outer pipe is connected with the other joints to form an external threaded interface which is internally connected with the faucet Threaded interface; the inner wall of the outer tube is empty dumbbell shaped, and is composed of a water inlet side cylinder, a water inlet side cone surface, a water passing cylinder surface, a water outlet side cone surface and a water outlet side cylinder surface; An end cone, a connecting column and an outlet end cone, wherein the inlet end cone and the outlet end cone are opposite to each other and are connected through a connecting column; the sealing ring (1) is fixed on the cone surface of the inlet end of the stem inlet cone, (3), the sealing ring (2) is installed between the outlet side cone of the outer tube and the outlet cone of the stem, and the sealing ring (2) is always under pressure (1), the sealing ring (1), (2) is O-shaped, the sealing ring (3) is square; the sealing ring (1) is used for sealing the core The cone between the inlet end of the column and the inlet side cone of the outer tube, The sealing ring (3) is used to close the gap between the bottom surface of the stem outlet cone and the faucet inlet. The sealing ring (2) is used to close the gap between the outlet cone of the stem and the outlet cone of the outer tube. Between the sealing ring (2), the water gap between the water column and the connecting column can pass through, the gap between the outer tube, the stem, the sealing ring is assembled, the sealing ring (1), Sealing ring (1) by the tap water or ring (2) The pressure generated by the axial compression is less than the water faucet installed to promote the stability of the stem axis Move to. When the pipe valve is connected with the water pipe, water pressure will move the core column to the water outlet end. The sealing ring (1) strengthens the gap between the cone surface of the inlet stem of the closed stem and the inlet side cone of the outer pipe , Water can not pass, pipe valve plug role. During installation of the faucet, the pipe valve is equivalent to the stop valve when the plunger of the pipe valve is not pushed to the water inlet end; the faucet inlet moves to the water inlet end, the seal ring (3) is pressed and the seal ring (3) The gap between the bottom surface of the outlet cone of the water outlet and the water inlet of the faucet moves the stem to move towards the water inlet end, the sealing ring (2) is pressed and the sealing ring (2) closes the cone surface of the outlet cone of the stem (1), (3) to the water inlet end of the move, until the seal (1) does not close the cone inlet cone core and the outer tube into Water side of the gap between the cone, tap water from the core cone inlet cone side and the inlet pipe side of the gap between the cone, the seal ring (2) and the connection between the column gap, the water column And the gap between the connecting column, the stem outlet end of the cone open hole flows into the faucet, the equivalent of ordinary pipe valve fittings, open the faucet that water. Faucet demolition, cleaning, faucet to the direction of the water movement, the tube valve cylinder in the water pressure and the seal (2) under the action of the tension also to the direction of the water, because the seal (1) by tap water or seal (2) The axial compression caused by the pressure is smaller than the axial movement of the faucet installed to the steady pushing stem, the sealing ring (1) firstly closes the space between the conical surface of the inlet stem of the stem and the inlet cone of the outer tube Clearance, after the faucet and seal (3) separation, the valve is quite and the globe valve, the water can not pass through the faucet removal or cleaning, other equipment normal use. More Search Keywords: Pipe valve