JP2517498Y2 - Antifreeze tap - Google Patents

Description

TECHNICAL FIELD The present invention relates to an antifreeze hydrant, and more specifically, to an antifreeze hydrant that starts up on the ground as a water passage inside the antifreeze to supply and drain water. Regarding

Problems to be Solved by Conventional Techniques and Inventions One example of this type of antifreeze water faucet is shown in FIG. 6, for example. This water tap 1 has a flat packing 3 attached to a lower portion of a spindle 2 in a state shown in the drawing, and a drain port 4
Is seated on the valve seat 5 communicating with the main body 6 to block communication with the inside of the main body 6, and another flat packing 7 is separated from the valve seat 9 leading to the inlet port 8 provided in the main body 6, and the main body from the inlet port 8 6 inside,
Also, the flow path 12 that passes through the inside of the outer jacket tube 11 and leads to the outflow port (not shown) provided in the upper part of the outer jacket tube is opened to bring it into a water-passing state. When the flat packing 3 is separated from the valve seat 5 by lowering the spindle 2 and the flat packing 7 is seated on the valve seat 9,
12 is closed to stop water, and at the same time, the check ball 13 provided in the drainage port 4 is pushed up to drain the water in the outer tube 11 or the main body 6. However, in this type, the flat packing is partially excessively compressed at the time of sealing so as to ensure the sealing, and thus the durability of the flat packing is problematic. In addition, the structure is quite complicated.

As another conventional example, there is one described in Japanese Utility Model Publication No. Sho 49-678, in which the antifreeze water tap has a part of a flow passage leading from the inflow port to the outflow port formed inside the piston inserted in the outer tube. ing. Therefore, the flow passage area is small and the head loss is very large, and sufficient water cannot be supplied in a place where the water pressure is low.

Means for Solving the Problems The present invention has been made to solve the above problems,
An object is to provide an antifreeze water faucet having excellent durability and a sufficiently wide flow passage area.

In order to achieve the above object, the antifreeze water tap according to the present invention,
An outer tube having an outflow port is connected to a main body having an inflow port and a discharge port to form a flow path inside, and a spindle is inserted from the upper part of the outer tube into the outer tube and the main body. In an antifreeze faucet that operates a spindle to switch between water-flowing state, water-stopping state, and drainage state, a cylinder part is formed in the main body, which communicates with an inlet port and a drainage port. It is slidably inserted. A seal member is attached to the lower portion of the spindle, and the operation of the spindle opens and closes the communication between the inflow port and the drain port in the cylinder. A bypass passage is provided that branches from the cylinder portion to bypass the cylinder portion, and connects the inflow port and the outflow port when passing water.

Embodiment An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a vertical sectional view of an antifreeze water tap 20 according to a first embodiment of the present invention, showing a water passing state.

Reference numeral 21 is a main body of the antifreeze water tap 20, and an inflow port 22 connected to an upstream side of a water pipe is formed in a lower portion thereof, and a drain port 23 is formed above the inflow port 22 and laterally. This drain 23
Is for draining water on the downstream side to prevent freezing when the water supply is not used, and is equipped with a check valve device 24. Since the function of the drainage port 23, the check valve device 24, and the like are well known, further description will be omitted.

A hollow outer tube 25 is attached to the upper opening of the main body 21, that is, the outer tube attachment port 29. Attached to the upper end of the outer tube 25 is cheese 26 having an outlet 27 that opens laterally. 28 is a bonnet attached to the top of the cheese 26.

30 is a cylinder portion formed in the main body 21
It is formed to be concentric with 25. An inflow port 22 and a drain port 23 communicate with each other inside the cylinder portion as shown in the drawing.

Reference numeral 31 is a handle whose shaft portion is inserted into the bonnet 28. A rod 33 is attached to the lower end of the handle 33 with a nut 32, and extends downward in the outer tube 25. Then, a spindle 34 is further attached to the lower end of the rod 33 using a pin 35. The spindle 34 is inserted into the cylinder portion 30. The shaft portion of the handle 31 is screwed into the bonnet 28. Therefore, by rotating the handle 31, the spindle 34 moves up and down in the cylinder portion 30.

FIG. 2 shows the main body 21 and the spindle 34 in the state shown in FIG.
It is sectional drawing which showed only.

The cylinder portion 30 of the main body 21 is provided with first, second, and third sliding contact portions 41, 42, and 43 in this order from above, and between the first sliding contact portion 41 and the second sliding contact portion 42. , And enlarged diameter portions 44 and 45 are formed between the second sliding contact portion 42 and the third sliding contact portion 43, respectively. The inflow port 22 communicates with the lower end of the third sliding contact portion 43,
The drainage port 23 communicates with the enlarged diameter portion 44. Further, a bypass flow path is provided which branches from the cylinder portion 30 and communicates with the outer tube mounting port 29. Specifically, an opening 46 is formed in the side wall of the enlarged diameter portion 45 of the cylinder portion 30, and the bypass flow that bypasses the cylinder portion 30 and communicates the inside of the cylinder portion 30 with the inside of the outer jacket tube 25, that is, the outlet 27. A passage 47 is formed in the body 21.

On the outer circumference of the spindle 34, there are first, second and third sliding contact portions.
O-rings 48, 49, 50 as first, second, and third sealing members are attached corresponding to 41, 42, 43, respectively, and in the water-passing state, as shown in FIG. The two O-rings 48 and 49 contact the first and second sliding contact portions 41 and 42, respectively, to seal the drainage port 23, and the third O-ring 50 moves upward from the third sliding contact portion 43. It is off and the inflow port 22 is open. Therefore, water flows from the inflow port 22 through the bypass flow path 47 to the outflow port.
It flows to 27.

In order to change the state of water flow shown in FIG. 1 or 2 to the state of stopping water or draining water, the handle 31 is rotated to lower the spindle 34 to the state shown in FIG. In this state, the first and second O-rings 48 and 49 are separated from the first and second sliding contact portions 41 and 42, respectively, and are located in the enlarged diameter portions 44 and 45, and the third O-rings
The ring 50 is in contact with the third sliding contact portion 43. The inlet 22 is therefore closed, while the drain 23 is opened and the enlarged diameter 44,
The water that flows into the outer tube 25 through the inside of the cylinder portion 30 is drained from the water outlet 23 on the downstream side.

FIG. 4 is a partial longitudinal sectional view of the second embodiment of the present invention.
The members corresponding to those of the first embodiment are designated by the same reference numerals with a ′ added. The illustrated state shows a water flow state.

In this embodiment, a drain port 23 'is formed in the lower portion of the main body 21' so as to communicate with the lower end of the third sliding contact portion 43 ', and the inflow port 22' is located above the drain port 23 '. The enlarged diameter portion between the first and second sliding contact portions 41 ', 42' is opened laterally at the position
It is provided in communication with 44 '. Reference numeral 51 is a cap that closes the lower end of the main body 21 '.

In the illustrated water flow state, the first and third O-rings 4
8'and 50'abut on the first and third sliding contact portions 41 'and 43', respectively, and the second O-ring 49 'is disengaged upward from the second sliding contact portion 42'. It is located in section 44 '. Therefore, the inflow port 22 'communicates with the inside of the enlarged diameter portion 44', the cylinder portion 30 ', and the outer tube 25' through the bypass flow passage 47 '.

When the spindle 34 'is lowered downward, the second O-ring 49' comes into contact with the second sliding contact portion 42 ', and the third O-ring 5'
0'is released downward from the third sliding contact portion 43 '. The first O-ring 48 'moves downward, but remains in contact with the first sliding contact portion 41'. Therefore, the inflow port 22 'is closed and the water on the downstream side is drained from the drain port 23'.

FIG. 5 shows a third embodiment of the present invention, the antifreeze water tap
20 "is in a water-passing state. Members corresponding to the members of the first embodiment are indicated by adding""to the same numbers.

In this embodiment, a drain port 23 ″ is formed in the main body 21 ″ so as to communicate with the enlarged diameter portion 44 ″ between the first sliding contact portion 41 ″ and the second sliding contact portion 42 ″, and the inflow port 22 ″ is formed. ″ Is provided below it in communication with the enlarged diameter portion 45 ″ between the second and third sliding contact portions 42 ″ and 43 ″. The lower end of the main body 21 ″ is closed.

In the illustrated water flow state, the first and second O-rings 4
8 ″ and 49 ″ come into contact with the first and second sliding contact portions 41 ″ and 42 ″, respectively, and the third O-ring 50 ″ is disengaged upward from the third sliding contact portion 43 ″. It is located in the portion 45 ". Therefore, the inflow port 22" communicates with the inside of the enlarged diameter portion 45 ", the cylinder portion 30", and the outer tube 25 "through the bypass flow passage 47".

In this case, the bypass passage 47 ″ communicates not with the middle of the cylinder portion 30 ″ but with the opening 46 ″ at the end thereof, but in the present specification, the concept of “branching from the cylinder portion” is used. Such cases are also included.

When the spindle 34 "is lowered downward, the first O-ring 48" is disengaged from the first sliding contact portion 41 "and is located at the enlarged diameter portion 44", and the third O-ring 50 "is moved to the third sliding portion 41". Abut the contact part 43 ″. The second O-ring 49 ″ moves downward, but remains in contact with the second sliding contact portion 42 ″. Therefore, the inflow port 22 ″ is closed and the water on the downstream side is drained from the drain port 23 ″.

Effect of the Invention As is clear from the above description, in the antifreeze water tap according to the present invention, the bypass flow passage which is a water flow passage during water passage is formed in the main body, so that a sufficient flow passage area is secured. It can be used without problems even in areas with low water pressure and low water pressure. Further, since the seal member is attached to the outer periphery of the lower part of the spindle and is brought into sliding contact with the cylinder part, it is not necessary to excessively compress at the time of sealing, and sufficient durability can be secured.

[Brief description of drawings]

FIG. 1 is a vertical cross-sectional view of a first embodiment of the present invention showing a water flow state, FIG. 2 is a partially enlarged view thereof, FIG. 3 is a partially enlarged view of a water-stopped and drained state, and FIG. , FIG. 5 shows the second,
It is a longitudinal sectional view of the third embodiment, showing a water passing state. Sixth
FIG. 1 is a partial cross-sectional view showing a conventional example. 21: body, 22: inflow port, 23: discharge port, 25: outer tube, 27: outflow port, 30: cylinder part, 34: spindle, 41: first sliding contact part, 42: second sliding contact part , 43: third sliding contact portion, 47: bypass passage, 48: first O-ring, 49: second O-ring, 50: third O-ring

Claims (2)

(57) [Scope of utility model registration request] 1. A main body having an inflow port, an outer tube mounting port, and a drainage port, and an outflow port at an upper portion, which is attached to the outer tube mounting port of the main body, and from the inflow port to the inside of the main body. An outer tube that forms an outflow passage through the outer tube to the outlet, a cylinder portion formed concentrically with the outer tube inside the main body, and from the upper portion of the outer tube to the cylinder through the outer tube. And a spindle inserted so as to be movable up and down, and the inlet, the outer tube mounting port, and the drain port communicate with each other via at least a part of the inside of the cylinder portion, and the spindle is moved. By doing so, the communication between the inflow port, the outer tube mounting port, and the drainage port is switched to switch between a water-passing state, a water-stopping state, and a draining state. At least one of the cylinder parts A detour path is provided to bypass the outer tube mounting port, and the outflow passage is constituted by the inflow port, the cylinder part, the detour circuit, the outer tube mounting port, and the outer tube when water is passed. Antifreeze hydrant that is designed to be. 2. The antifreeze water tap according to claim 1, wherein the inflow port, the outer tube mounting port, and the drain port are provided in the cylinder portion at a lower end portion, an upper end portion, and an intermediate portion of the cylinder portion. An antifreeze water faucet configured to communicate with each other, wherein the bypass line communicates with the bypass line at a position between the lower end portion and the intermediate portion of the cylinder portion.