JPH0676461U - Valve structure of antifreeze faucet - Google Patents

Abstract

(57) [Abstract] [Purpose] The present invention is a piston-cylinder type antifreeze water supply which has a large flow rate and is free from noise due to vibration of the ball valve, wear of the ball valve, and the like. It is to provide a stopper. [Composition] An inflow port is provided on the side wall of a cylindrical valve box above the outflow port, and a ball valve is positioned between upper and lower cylinders closest to the inflow port so that a jet flow from the inflow port reaches through a piston. Between the valve chamber that houses the piston and the piston.
It is also possible to form slopes having a downward slope toward the valve chamber that is narrower than the valve valve, and further to provide a valve seat of the ball valve at the lower end of the upper cylinder closest to the inlet.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to an improvement in the valve structure of a piston-cylinder type antifreeze water tap using a ball as an auxiliary valve.

[0002]

[Prior art]

 Conventionally, an antifreeze water faucet is usually equipped with an auxiliary valve at the inlet so that the piston can be pulled out without stopping the water stopcock installed upstream when repairing the piston. Was there. Among them, in Japanese Utility Model Publication No. 52-55710 of the same applicant, a ball is used as an auxiliary valve, and the valve seat is provided not on the inlet side but on the cylinder side, so that the structure is simple and large. It has been widely used because it has the advantage of obtaining a flow rate.

However, when the rubber packing attached to the inlet is tightened and the hole diameter of the packing becomes smaller than the ball diameter to some extent, a high-speed jet flux hits the ball and vibrates, causing a jet flow. When the bundle becomes smaller, the ball is attracted to the inlet side opposite to the flow direction, vibrates violently in the vicinity to generate noise, and friction with the inner wall of the valve box causes wear of the ball. Was the cause of. In order to prevent this, as described in Japanese Utility Model Publication No. 62-14198 by the same applicant, an obstacle for generating an irregular flow is provided on the upstream side of the ball, and the jet flow from the inlet is provided. A method of causing the collision to make the pressure distribution acting on the surface of the ball as uneven as possible has been used.

By the above-mentioned method, the generation of vibration is significantly suppressed, the generation of noise and the wear of the ball have become almost no problem, but the thicker the obstacle, the more effective it is. There was a defect that the flow rate was adversely affected and that the flow rate that was initially expected could not be obtained. In particular, recently, from the viewpoint of hygiene management, local governments have been supplying water directly to high places such as the 3rd and 5th floors without using tanks, and antifreeze hydrants with minimal head loss are desired. In the current situation, that was a problem that had to be resolved immediately.

[0005]

[Problems to be solved by the device]

 In view of the above points, in the present invention, even if the hole diameter of the inlet side mounting packing is small, there is no noise and wear due to the vibration of the ball, and a large flow rate that sufficiently satisfies the above requirements can be obtained. The purpose is to provide a stopper.

[0006]

[Means for Solving the Problems]

 The present invention is provided separately from the inlet such that the valve chamber for accommodating the ball is located on the opposite side of the inlet so that the jet from the inlet first strikes the piston and then hits the ball. The ball valve seat is located at the lower end of the nearest cylinder above the valve chamber, and the slope of the downward slope toward the valve chamber is narrower than the ball valve at both ends across the piston. Each is formed.

[0007]

[Action]

 Therefore, the jet flow from the inlet first collides with the piston and diffuses, and then the ball is hit by an irregular flow, which contributes to the fact that the piston is thick and the above-mentioned vibration does not occur at all. Since there are no obstacles, balls, or valve seats at the inlet, a flow rate sufficient to satisfy the above requirements can be obtained.

[0008]

【Example】

 FIG. 1 shows one embodiment of the present invention. In the figure, reference numeral 1 is a valve box of the present invention, in which a drainage port 2, an inflow port 3 and an outflow port 4 are formed on a side wall in order from the top, and A cylinder 5 is provided above the drainage port 2, a cylinder 6 is provided between the drainage port 2 and the inflow port 3, a cylinder 7 is provided between the inflow port 3 and the outflow port 4, and a cylinder 8 is provided below the outflow port 4. The drainage chamber 9 is formed below. Reference numeral 10 denotes a piston, which is provided with annular packings 11, 12, 13, 14 for sliding the cylinders 5, 6, 7, 8 respectively on the outer side, and a communication hole which is internally opened between the lower end and the annular packings 11, 12. I'm wearing 15.

A valve chamber 17 for accommodating a ball valve 16 is formed between the cylinders 6 and 7 in the valve box 1 on the side opposite to the inflow port 3 via the piston 10, and the piston 10 is sandwiched on both sides. Further, a sloped portion 18 that is narrower than the ball valve 16 and has a downward slope toward the valve chamber 17 is provided, and a valve seat 19 with which the ball valve 16 abuts is formed at the lower end of the cylinder 6. Although not shown, a drain valve 2 is provided with a check valve for preventing contamination of underground wastewater, and the valve box 1 is installed via a pipe 20 and the piston 10 is installed via a joint 21 and a rod 22. And is connected to an operation part (not shown) on the ground. Reference numeral 23 denotes a plug of the valve chamber 17, which may be screwed in after the ball valve 16 is housed.

The figure shows a water flowing state, in which water from the inflow port 3 flows from the outflow port 4 through the gap between the cylinder 7 and the piston 10 to a faucet at the end via a rising pipe (not shown). It At this time, the annular packings 12 and 14 are in close contact with the cylinders 6 and 7, respectively, and no water leaks from them. When draining the water in the rising pipe, the rod 22 and the piston 10 may be lowered from the state shown in the figure. First, the annular packing 13 is brought into close contact with the cylinder 7 to shut off the water from the inflow port 3, and then the annular The packing 14 separates from the cylinder 8, and the water in the rising pipe passes through the drainage chamber 9 and the communication hole 15 of the piston 10 and is discharged from the drainage port 2 to the ground. At this time, since the annular packing 11 is in close contact with the cylinder 5, water does not rise in the pipe 20.

Even if the rubber packing (not shown) on the inlet 3 side is tightened in the water-flowing state shown in the figure to reduce the hole diameter, the high-speed jet from there first collides with the piston 10 and diffuses, After that, since the ball valve 16 is hit, the pressure distribution acting on the surface of the ball valve 16 becomes uneven, and the above-mentioned regular vibrating vibration does not occur. Noise, wear of the ball valve, etc. Does not happen. In this case, since the diameter of the piston 10 as an obstacle can be made considerably large, the above-mentioned effect is further enhanced. Furthermore, since there is nothing that causes a head loss in the inflow port 3, it is possible to obtain a larger flow rate than that of the above-mentioned reference example.

Next, a description will be given of when the piston 10 is pulled out from the pipe 20 due to a failure of the annular packing or the like. When the faucet at the end of the rising pipe is pulled out with the faucet closed, the water from the inflow port 3 tends to jet into the pipe 20, and the ball valve 16 instantly rises to abut on the valve seat 19 with this water flow, Shut off the water from the inlet 3. Even if the faucet is opened in this state, the ball valve 16 closes the valve seat 19 by the water pressure, so that the faucet can be opened and water can be used freely even during the repair of the piston. Also, when the piston 10 is pulled out from the pipe 20 with the faucet open, the pressure loss due to the start-up pipe and the faucet is large, so the water from the inlet 3 enters the pipe 20 more than the outlet 4 side. , Trying to flow with greater momentum, and again the ball valve 16 closes the valve seat 19.

Therefore, it is convenient because there is no need to search for and stop the water stopcock (not shown) provided on the upstream side. When repairing is completed and the piston 10 is inserted, the tip of the piston 10 pushes down the ball valve 16 against the water pressure to disengage it from the valve seat 19, and further along the slope portion 18 the ball valve 16 is pushed. The piston 10 is returned to the position shown in the drawing after the ball valve 16 is retracted to the valve chamber 17 while being pushed down to descend in the cylinder. At this time, if the tap is inserted with the faucet open, the water pressure becomes so low that the force for pushing up the ball valve 16 is also reduced, and the insertion is performed smoothly, which is very convenient especially at high water pressure.

In the illustrated embodiment, the valve chamber 17 is provided on the opposite side of the inflow port 3 via the piston 10, but it is provided at an appropriate position other than the inflow port 3, such as being provided at a right angle. In any case, the jet flow from the inflow port 2 first collides with the piston 10. As another embodiment, the valve box 1 is divided into two parts so that the directions of the inflow port 3 and the outflow port 4 can be freely changed, the drain port 2 is located on the side of the drain chamber 9, and the cylinder 5 and The design of the annular packing 11 and the communication hole 15 may be omitted without departing from the scope of the present invention.

[0015]

[Effect of the present invention]

 As described above, according to the present invention, since the piston itself is used as the obstacle for generating the irregular flow described in Japanese Utility Model Publication No. 62-14198, the obstacle is not adversely affected by the water discharge amount. It is possible to make the object thicker, and thus the vibration prevention effect mentioned above is also increased, noise and wear of the ball valve can be eliminated, and at the inlet, there is a valve seat, an obstacle, and a ball valve. Since there is nothing that hinders the flow of water, there is an effect that a large flow rate can be supplied.

[Brief description of drawings]

FIG. 1 is a vertical sectional view in a water passing state showing one embodiment of the present invention.

[Explanation of symbols]

 1 Valve Box 2 Drain Port 3 Inlet 4 Outlet 5, 6, 7, 8 Cylinder 9 Drain Chamber 10 Piston 11, 12, 13, 14 Annular Packing 15 Communication Hole 16 Ball Valve 17 Valve Chamber 18 Slope 19 Valve Seat 20 Pipe 22 Rod 23 Plug

Claims (1)

[Scope of utility model registration request] 1. An antifreeze for stopping and discharging water by vertically moving a piston equipped with an annular packing in a valve box in which a side wall is provided with an inflow port, an outflow port, and a drainage port and a required number of cylinders are provided therein. In the water tap, a valve chamber for accommodating the ball valve in the valve box at a position where a jet flow from the inlet reaches via a piston between upper and lower cylinders closest to the inlet provided above the inlet. The slopes of the ball valve, which are narrower than the ball valve and have a downward slope toward the valve chamber, are formed on both sides of the piston, and the valve seat of the ball valve is located at the lower end of the upper cylinder closest to the inlet. The valve structure of the antifreeze water tap.