JPH0542358U - Antifreeze tap - Google Patents

Abstract

(57) [Summary]   Because it is an application before electronic filing There is no abstract / selection drawing and applicant identification number.

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 in the antifreeze to supply and drain water. Regarding

Problems to be Solved by Conventional Techniques and Inventions An example of this type of antifreeze water tap is shown in FIG. 6, for example. In the state shown in the figure, this water tap 1 has a flat packing 3 attached to the lower part of the spindle 2 which is seated on a valve seat 5 leading to a drainage port 4 to block communication with the inside of the main body 6 and to prevent other flat packing. 7 is separated from a valve seat 9 leading to an inflow port 8 provided in the main body 6, and passes from the inflow port 8 through the inside of the main body 6 and the inside of the outer tube 11 to the outflow port provided at the upper part of the outer tube ( A flow path 12 leading to a water passage (not shown) is opened so that water can pass through. When the flat packing 3 is moved away from the valve seat 5 by lowering the spindle 2 and the flat packing 7 is seated on the valve seat 9, the flow passage 12 is closed and water is stopped. The stopper ball 13 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 over-compressed at the time of sealing in order to ensure the sealing, and thus the durability of the flat packing is problematic. In addition, the structure is quite complicated.

 Another conventional example is the one described in Japanese Utility Model Publication No. 49-678, in which the antifreeze water tap has a part of the flow passage from the inlet to the outlet formed inside the piston inserted in the outer tube. Has been done. As a result, the channel area is narrow and the head loss is very large, and sufficient water cannot be supplied in places with low water pressure.

Means for Solving the Problems The present invention has been made to solve the above problems, and an object thereof 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 faucet according to the present invention forms a flow path inside by connecting an outer tube having an outlet to a main body having an inlet and an outlet. In an antifreeze water tap that inserts a spindle from the upper part of the pipe into the jacket tube and inside the main body and operates the spindle to switch between water passing state, water stoppage and drainage state, Form a communicating cylinder portion, and the lower portion of the spindle is slidably inserted into the cylinder portion. A seal member is attached to the lower part 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 flow path is provided that branches from the cylinder section to bypass the cylinder section and connects the inlet and the outlet when water is flowing.

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

 FIG. 1 is a longitudinal sectional view of an antifreeze water tap 20 according to the 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 port 23 is for draining water on the downstream side to prevent freezing when the water supply is not in use, and is equipped with a check valve device 24. The function of the drainage port 23, the check valve device 24, and the like are well known, and a further description will be omitted.

 A hollow outer tube 25 is attached to the upper opening of the main body 21. Attached to the upper end of the outer tube 25 is a cheese 26 having an outlet 27 that opens to the side. 28 is a bonnet attached to the upper portion of the cheese 26.

 Reference numeral 30 denotes a cylinder portion formed in the main body 21, and is formed so as to be concentric with the outer tube 25. An inflow port 22 and a drainage 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, and a rod 33 is attached to the lower end of the handle 33 using a nut 32, and extends downward in the outer tube 25. Further, a spindle 34 is further attached to the lower end of the rod 33 by 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, and therefore, by rotating the handle 31, the spindle 34 moves up and down in the cylinder portion 30.

 FIG. 2 is a sectional view showing only the main body 21 and the spindle 34 in the state of FIG.

 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. Further, 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 part 43, and the drain port 23 communicates with the enlarged diameter part 44.

Further, an opening 46 is formed in the side wall of the enlarged diameter portion 45, and a bypass flow passage 47 that bypasses the cylinder portion 30 and connects the inside of the cylinder portion 30 to the inside of the outer jacket tube 25, and thus to the outlet 27 is provided inside the main body 21. Has been formed.

 On the outer circumference of the spindle 34, O-rings 48, 49, 50 as first, second, and third sealing members are provided corresponding to the first, second, and third sliding contact portions 41, 42, 43, respectively. 2, the first and second O-rings 48 and 49 come into contact with the first and second sliding contact portions 41 and 42, respectively, as shown in FIG. 23 is sealed, the third O-ring 50 is separated upward from the third sliding contact portion 43, and the inflow port 22 is opened. Therefore, the water flows from the inflow port 22 through the bypass flow path 47 to the outflow port 27.

 To change from the water-passing state shown in FIG. 1 or 2 to the water-stopping or draining state, 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 disengaged 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-ring 50 is the third O-ring 50. 3 is in contact with the sliding contact portion 43.

Therefore, the inflow port 22 is closed, while the drainage port 23 is opened and communicates with the inside of the mantle tube 25 through the inside of the enlarged diameter portion 44 and the cylinder portion 30, so that the water on the downstream side is drained from the drainage port 23.

 FIG. 4 is a partial vertical sectional view of the second embodiment of the present invention. The members corresponding to the members of the first embodiment are designated by the same reference numerals with 'added. The state shown in the figure shows the water flow state.

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

 In the water-flowing state shown in the figure, the first and third O-rings 48 'and 50' abut the first and third sliding contact portions 41 'and 43', respectively, and the second O-ring 49 '. 'Is separated from the second sliding contact portion 42' upward and is located in the enlarged diameter portion 44 '. Accordingly, 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 50' comes off 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, in which the antifreeze water tap 20 "is in a water-passing state. The members corresponding to the parts of the first embodiment are indicated by adding" "to the same numbers. ing.

 In this embodiment, the 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 provided below it in communication with the enlarged diameter portion 45 "between the second and third sliding contact portions 42", 43 ". The lower end of the main body 21" is closed.

 In the illustrated water-flowing state, the first and second O-rings 48 "and 49" contact the first and second sliding contact portions 41 "and 42", respectively, and the third O-ring 50 ″ Is located above the enlarged diameter portion 45 ″ of the third sliding contact portion 43 ″. Therefore, the inflow port 22 ″ is located inside the enlarged diameter portion 45 ″, the cylinder portion 30 ″, and the bypass passage 47. Via the "into the outer tube 25".

 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 contact portion 41 ″. It abuts the contact portion 43 ″. The second O-ring 49 ″ moves downward but remains in contact with the second sliding contact portion 42 ″. Therefore, the inlet 22 "is closed and the water on the downstream side is drained from the drain 23".

Effect of the Invention As is clear from the above explanation, 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 passing 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 are vertical cross-sectional views of the second and third embodiments, respectively, showing the water flow state. FIG. 6 is a partial sectional view showing a conventional example. 21: body, 22: inflow port, 23: drain 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 part, 47: bypass passage, 48: first O-ring, 49: second O-ring, 50: third O-ring

Claims (1)

[Scope of utility model registration request] 1. A main body having an inflow port and a discharge port is connected to an outer tube having an outflow port to form a flow path therein, and from the upper part of the outer tube to the outer tube and the main body. In the antifreeze water faucet that inserts a spindle and a spindle, and operates the spindle to switch between a water passing state, a water stop state, and a draining state, a cylinder portion is formed in the main body so that the inlet port and the drain port communicate with each other. The lower part of the spindle is slidably inserted into the cylinder part, and a seal member attached to the outer periphery of the lower part by the operation of the spindle causes the inflow port and the drain port to be in the cylinder. The opening and closing of the communication is performed, and a bypass flow path is provided to branch from the cylinder part to bypass the cylinder part and to connect the inlet and the outlet at the time of water flow. Antifreeze tap.