CN204985842U - Two tee bend switching -over stop valves - Google Patents

Abstract

The utility model discloses a two-position three-way reversing cut-off valve, which comprises a water inlet pipe (1). The two water inlet pipes are respectively connected with a first water outlet pipe (2) and a second water outlet pipe (3). The first communication port (4) formed at the connection point of the first water outlet pipe and the second communication port (5) formed at the connection point of the water inlet pipe and the second water outlet pipe are concentric and have the same diameter. A bypass pipe with the same center and the same diameter as the second communication port and the second communication port. A valve stem extending to the water inlet pipe is fitted in the bypass pipe. The outer diameter of the movable disc (6) matches the first communication port and the second communication port. The beneficial effect of the utility model is that when the fire water pressure is insufficient in a disaster situation, the actuator drives the valve disc to the first communication port, and the water inlet pipe and the second water outlet pipe are connected to form a passage, so as to fully guarantee the water supply of the firefighting terminal.

Description

Two-position three-way reversing globe valve

technical field

The utility model relates to a valve, in particular to a reversing valve.

Background technique

Globe valve, also known as cut-off valve, is a forced sealing valve, so when the valve is closed, pressure must be applied to the disc to force the sealing surface not to leak. When the medium enters the valve from the bottom of the disc, the resistance that the operating force needs to overcome is the friction between the valve stem and packing and the thrust generated by the pressure of the medium. The force to close the valve is greater than the force to open the valve, so the valve stem The diameter of the valve must be large, otherwise the failure of the valve stem to bend will occur. The opening and closing part of the globe valve is a plug-shaped disc, the sealing surface is flat or inclined cone, and the disc moves linearly along the center line of the valve seat. The movement form of the valve stem, (common name: dark rod), also has a lifting and rotating rod type that can be used to control various types of fluids such as air, water, steam, various corrosive media, mud, oil, liquid metal and radioactive media. flow. Therefore, this type of shut-off valve is very suitable for cutting or regulating and throttling. Because the opening or closing stroke of the valve stem of this type of valve is relatively short, and it has a very reliable cut-off function, and because the change of the valve seat opening is proportional to the stroke of the valve disc, it is very suitable for flow adjustment. At present, the water pressure of fire terminal in many areas is low, and the range of fire water is often not enough, and the head is short, so it is difficult to play a greater role in the event of a disaster.

Utility model content

The technical problem to be solved by the utility model is that the water supply pressure of the existing fire terminal is relatively low. Therefore, the fire terminal water and residential water are combined through a stop valve to provide a two-position three-way reversing stop valve.

The technical scheme of the utility model is: a two-position three-way reversing stop valve, which includes a water inlet pipe, and the water inlet pipe is respectively connected with a first water outlet pipe and a second water outlet pipe, and the water inlet pipe is connected with the first water outlet pipe. The first communication port formed at the pipe connection and the water inlet pipe are concentric and the same diameter as the second communication port formed at the second water outlet pipe connection, and the second water outlet pipe is also provided with a concentric connection with the first communication port and the second communication port. A bypass pipe with the same diameter, a valve stem extending toward the water inlet pipe is fitted in the bypass pipe, and a valve that can move linearly between the first communication port and the second communication port is fixed at the end of the valve rod flap, and the outer diameter of the valve flap is adapted to the first communication port and the second communication port.

In the above solution, the bypass pipeline is provided with an actuator that drives the valve disc to move.

The beneficial effect of the utility model is that the first water outlet pipe is used as a residential water pipe, the second water outlet pipe is used as a fire-fighting water pipe, and the valve disc is usually located between the first communication port and the second communication port, so that both residents and fire-fighting pipes have Water is available. When the water pressure of fire-fighting water in a disaster situation is insufficient, the actuator will drive the valve disc to the first communication port, the passage between the water inlet pipe and the first water outlet pipe will be cut off, and the water inlet pipe and the second water outlet pipe will be connected to form a passage, fully guaranteeing Fire terminal water supply.

Description of drawings

Fig. 1 is a schematic diagram of the utility model;

In the figure, 1. water inlet pipe, 2. first water outlet pipe, 3. second water outlet pipe, 4. first communication port, 5. second communication port, 6. valve disc, 7. actuator.

detailed description

Below in conjunction with accompanying drawing, the utility model is further described.

As shown in Figure 1, the utility model includes a water inlet pipe 1, and the two water inlet pipes are respectively connected with a first water outlet pipe 2 and a second water outlet pipe 3, and the water inlet pipe and the first water outlet pipe are connected to each other. The first communication port 4 and the second communication port 5 formed at the connection between the water inlet pipe and the second water outlet pipe are concentric and have the same diameter. A bypass pipe, the bypass pipe is fitted with a valve stem extending toward the water inlet pipe, the end of the valve stem is fixed with a valve disc 6 that can move linearly between the first communication port and the second communication port, The outer diameter of the valve flap is adapted to the first communication port and the second communication port.

In order to facilitate the movement of the valve disc, an actuator 7 that drives the valve disc to move can be provided outside the bypass pipe. The actuator can be a motor or a handwheel, and the linear motion of the valve stem and valve plate can be controlled by starting the motor or turning the handwheel.

The utility model is used as follows: under normal conditions, the actuator is activated to move the valve flap to the middle position between the first communication port and the second communication port, and the water flows from the water inlet pipe into the first water outlet pipe through the first communication port and the second communication port respectively. And the second water outlet pipe, when the water pressure of the first water outlet pipe is insufficient and the second water outlet pipe is not in a hurry to use water, start the actuator to move the valve disc to the second communication port, cut off the water inlet pipe and the second water outlet pipe, and do our best to The first water outlet pipe supplies water; when the water pressure of the second water outlet pipe is insufficient and the first water outlet pipe is not in a hurry to use water, start the executive mechanism to move the valve disc to the first communication port, cut off the water inlet pipe and the first water outlet pipe, and do our best to The second water outlet pipe supplies water.

During specific implementation, the first water outlet pipeline can be set as a residential water pipeline, and the second water outlet pipeline can be set as a fire-fighting water pipeline, or the first water outlet pipeline can be set as a fire-fighting water pipeline, and the second water outlet pipeline can be set as a residential water pipeline. pipeline. Realize two positions, that is, the first communication port and the second communication port, and the three-way connection, that is, the water inlet pipe is connected with the first and second water outlet pipes, the water inlet pipe is connected with the first water outlet pipe, and the water inlet pipe is connected with the second water outlet pipe. Commutation cut-off function.

Claims (2)

1. two-bit triplet commutation stop valve, it is characterized in that it comprises intake pipe (1), described intake pipe two is communicated with the first outlet conduit (2) and the second outlet conduit (3) respectively, the first connecting port (4) that described intake pipe and the first outlet conduit connectivity part are formed and the concentric same footpath of the second connecting port (5) that intake pipe is formed with the second outlet conduit connectivity part, described second outlet conduit is also provided with the bypass duct with the first connecting port and the concentric same footpath of the second connecting port, the valve rod that in described bypass duct, adaptive oriented intake pipe extends, described valve stem end is connected with the flap (6) that can move linearly between the first connecting port and the second connecting port, described flap external diameter and the first connecting port and the second connecting port suitable.

2. two-bit triplet commutation stop valve as claimed in claim 1, is characterized in that the actuator (7) being provided with the movement of actuating valve lobe outside described bypass duct.