JP2023071339A - Antifreeze water tap post - Google Patents

Abstract

To realize simplification, downsizing, and cost reduction of a water discharge port and to avoid troubles or failures such as dust clogging in an air passage by protecting an air suction port externally.SOLUTION: An antifreeze water tap post includes a spool valve mechanism 4 that can switch to a water supply mode Ms, a water cut-off mode Mc, or a water removal mode Mr by a spool part 4s that moves up and down through an operation mechanism 3 and disposes a thermo-valve 5 in a water passage R inside a water discharge port 2e, where, when at least an external temperature drops to a predetermined temperature or lower, the thermo-valve 5 is switched to an air suction side to allow air suction into the water passage R inside a water vertical pipe 2 closed by the water cut-off mode Mc, and the antifreeze water tap post shifts to the water removal mode Mr. When constituting the antifreeze water tap post, a residue preventing function Fr that discharges residual water Wo remaining in a water discharge passage Ro at least in the water cut-off mode Mc is provided, and an air suction port 5i of the thermo-valve 5 disposed inside the water discharge port 2e is caused to face the inside of the water discharge passage Ro.SELECTED DRAWING: Figure 1

Description

TECHNICAL FIELD The present invention relates to a non-freezing faucet column having a water supply riser installed outdoors such as in the garden of a house in cold regions.

Conventionally, in outdoor areas such as residential gardens, faucet columns with outlets at the top of the water supply riser pipes are often installed. Water faucets are often installed. By the way, the non-freezing faucet column usually needs to be drained by closing the anti-freezing faucet in cold weather, and there is also a problem that management is troublesome. Therefore, in order to solve this problem, the applicant of the present application has already developed a non-freezing faucet pillar equipped with an automatic water draining function that automatically drains water when the outside air temperature is below a set temperature. proposed by

The non-freezing faucet column equipped with an automatic draining mechanism described in Document 1 has a rational mechanism that can automatically drain water when the outside air temperature is below the set temperature, so that the operation of draining and draining water can be performed more accurately. The object is to provide a non-freezing faucet column that can be easily operated, and specifically includes a water flow valve mechanism equipped with a draining mechanism, a rising water passage, a water outlet, and an operation portion. , an intake shutoff valve that opens and closes the communication part between the rising water passage and the water outlet, and an intake opening and closing mechanism for automatic draining that communicates with the rising water passage. and an air passage that communicates with the rising water passage through the air intake communication portion provided below the communication portion. There is an intake check valve that opens the ventilation path, and when the outside temperature is higher than the set temperature, the ventilation path is closed, and when the outside temperature is below the set temperature, the ventilation path is opened so that water can be automatically drained. and a temperature sensing valve portion.

FIG. 9 shows a principle configuration diagram for explaining the operation of the non-freezing faucet column described in Document 1 when the water is drained. In the non-freezing faucet column 100 shown in the same figure, 101 is a water supply riser standing upward from the ground, and near the upper end of this water supply riser 101, a water outlet 102 protruding in the horizontal direction is provided. In addition, a tip spout 103 projecting obliquely forward is provided on the lower surface of the outer peripheral surface near the tip of the spout portion 102 . A temperature sensing valve portion 104 is arranged inside the spout portion 102 . As a result, in the water stop mode, the operating rod 106 is displaced downward by the turning operation of the handle 105, and the spool valve mechanism provided at the lower end of the operating rod 106 (not shown) and the upper portion of the operating rod 106 are shown. The upper opening/closing mechanism 108 shown in 9 is switched to the closed side, and the water passage (rising water passage) Rmr is shut off. In this case, since the temperature sensing valve portion 104 is switched to the closed side (blocking side), the inside of the rise water passage Rmr is It becomes a sealed state, and the residual water remains in the rising water passage Rmr as it is.

In addition, since the water passage (discharge water passage) Ror inside the water discharge port portion 102 is also sealed except for the tip water discharge port 103, the residual water Wor inside the discharge water passage Ror remains as it is. That is, as shown in FIG. 9, the discharge of the residual water Wor from the tip spout 103 is prevented by surface tension or the like. In the existing state, the temperature sensing valve portion 104 is switched to the intake side (open side). For this reason, the air intake passage 110 through which air is sucked has been separately formed as an independent path at the tip portion of the water discharge port portion 102 . In FIG. 9, 110i denotes a front end port (inflow port) of the intake passage 110 facing the atmosphere, and 110e denotes a rear end port (outflow port) 110e communicating with the intake port 104i of the temperature sensing valve portion 104. FIG. As a result, air is circulated along the dashed-dotted line arrow Air shown in FIG. 9 at the time of intake. That is, the air is taken in the route of the inflow port 110i→intake passage 110→outflow port 110e→intake port 104i→the inside of the temperature sensing valve portion 104→the rising water passage Rmr, and the closed state of the rising water passage Rmr is released. As a result, the residual water Wrr remaining inside the rising water passage Rmr is discharged to the outside.

JP 2016-180287 A

However, the antifreeze faucet column 100 described in Patent Document 1 described above also has the following problems to be solved.

That is, due to the structure of the antifreeze faucet column 100, when residual water Wor exists in the spout 102, it is practically difficult to take air directly from the temperature sensing valve 104. A separate intake passage 110 must be secured. In this case, since it is necessary to form the air intake passage 110 in the water discharge port portion 102 having a limited formation site, it is necessary to secure a complicated route around the water discharge port portion 102 . There was a problem that it was easy to cause an increase in size and cost in the vicinity.

In addition, since the inlet 110 i facing the outside is directly opened to the atmosphere from the water outlet portion 102 , dust, dirt, soil, sand, etc. in the atmosphere easily enter the ventilation passage 110 . There were also points to be improved, such as failures and troubles easily occurring due to dust clogging.

SUMMARY OF THE INVENTION It is an object of the present invention to provide an antifreeze faucet column that solves the problems existing in the background art.

In order to solve the above-described problems, the antifreeze faucet column 1 according to the present invention includes a water supply riser 2 having a spout portion 2e at the top, and an operation mechanism 3 attached to the water supply riser 2. , a spool valve mechanism 4 that can be switched between a water supply mode Ms, a water stop mode Mc, and a water drain mode Mr by a spool 4s that is vertically displaced by the operation mechanism 3, and a water passage inside the water discharge port 2e. A thermo valve 5 is provided in R (discharge water passage Ro), and when the outside air temperature drops below the set temperature, the thermo valve 5 is switched to the intake side, and the water supply riser pipe 2 sealed by the water stop mode Mc is closed. When constructing an anti-freezing faucet column that allows air intake to the water conduit R (rising water conduit Rm) inside and shifts to the drain mode Mr, at least in the water stop mode Mc and the drain mode Mr, the inside of the discharge water conduit Ro In addition to providing a residual prevention function Fr for discharging the residual water Wo remaining in the water discharge passage Ro to the outside, the intake port 5i for intake air inflow of the thermo valve 5 disposed inside the water discharge port portion 2e faces the inside of the discharge water passage Ro. It is characterized by being made.

Further, according to a preferred embodiment of the present invention, the residual prevention function Fr is configured such that the spout portion 2e has a drainage structure that allows at least the residual water Wo remaining inside to flow out from the spout tip 2es to the outside when the water is stopped. In addition, a portion of the inner diameter of the water passage leading to the spout tip 2es can be formed by the tapered surface 11 that gradually increases in diameter toward the downstream side in the axial direction. At this time, it is desirable that the tapered surface 11 has an outer opening diameter Lo of 12.5 mm or more and a slope angle Qo of 25° or more and 45° or less. Furthermore, the water outlet portion 2e is provided with a water discharge pipe portion 12 covering the discharge water passage Ro and between the discharge water passage Ro and the rising water passage Rm, which is cut off when switching from the water supply mode Ms to the water stop mode Mr. , an upper opening/closing mechanism Vs that opens when switching from the water stop mode Mc or the water drain mode Mr to the water supply mode Ms can be provided. On the other hand, the upper end of the rising water passage Rm is blocked at the lowest position Xd of the spool portion 4s, and the upstream end of the rising water passage Rm is opened by the upward displacement of the spool portion 4s from the lowest position Xd. a valve mechanism portion Vf, an inner discharge passage 6 formed inside the spool portion 4s and having a lower inlet 6i and an upper outlet 6e, and attached to the inner discharge passage 6, at least The inner check valve mechanism Vnf that shuts off the inner discharge passage 6 by a predetermined water pressure due to the tap water W flowing in from the inlet 6i, and the outer discharge passage 7 and the outlet 6e facing the outside at the lowest position Xd of the spool portion 4s. , and in a predetermined displacement section of the spool portion 4s upwardly displaced from the lowest position Xd, a spool valve mechanism portion 4 that communicates the inflow port 6i and the water passage R (inlet water passage Rf) can be provided. . Also, the lower opening/closing valve mechanism Vf is positioned below the valve body 13v fixed to the lower end of the spool 4s, and below the valve body 13v, and is formed on the outer surface of the supply water passage Rf. By doing so, it is possible to provide a valve seat portion 13s that abuts on or separates from the valve body portion 13v. An upstream discharge passage 15 formed with a large diameter over the length and having a valve seat hole portion 14 at the upper end is formed vertically, and a spherical ball valve portion 16 accommodated in the upstream discharge passage 15 is provided. can be configured

According to the non-freezing faucet column 1 according to the present invention having such a configuration, the following remarkable effects can be obtained.

(1) At least in the water stop mode Mc and the water drain mode Mr, the thermo valve 5 is provided with a residual prevention function Fr that discharges the residual water Wo remaining in the discharge water passage Ro to the outside, and is disposed inside the water discharge port 2e. Since the intake port 5i for inflowing the intake air faces the inside of the discharge water passage Ro, the residual water Wo remaining in the discharge water passage Ro can be reliably discharged to the outside by the residual prevention function Fr. In the water stop mode Mc (drainage mode Mr), the discharge water conduit Ro can be emptied at all times. As a result, even when the thermo valve 5 is disposed inside the discharge water passage Ro, the intake port 5i of the thermo valve 5 can be directly exposed to the discharge water passage Ro. As a result, a complicated ventilation passage to be formed around the water discharge port 2e becomes unnecessary, and the water discharge port 2e can be simplified and miniaturized, and the cost can be reduced. Since it can be protected, it is possible to avoid troubles and failures such as clogging of the ventilation passage with dust.

(2) According to a preferred embodiment, when realizing the residual prevention function Fr, the configuration of the spout portion 2e is a drainage structure that allows at least the residual water Wo remaining inside to flow out from the spout tip 2es to the outside when the water is stopped. and part of the inner diameter of the water passage leading to the spout tip 2es is formed by the tapered surface 11 that gradually increases in diameter toward the downstream side in the axial direction. The water Wo can be discharged quickly, smoothly and reliably, and in addition, the inside freezing of the spout part 2e in cold districts and the icicle-like freezing occurring outside can be avoided, and the quality and product of the non-freezing water faucet column 1 can be obtained. can enhance sexuality. In addition, it can be implemented relatively easily by changing the shape of the spout portion 2e, etc., and is excellent in easiness of implementation and low cost.

(3) According to a preferred embodiment, when forming the tapered surface 11, the outer opening diameter Lo at the tip of the tapered surface 11 is 12.5 mm or more, and the inclination angle Qo of the tapered surface 11 is 25° or more and 45° or less. If set, it can cover many types of non-freezing faucet columns based on the current water supply standards, etc., so it can be implemented as an optimal form from the viewpoint of ensuring sufficient performance.

(4) According to a preferred embodiment, the water outlet portion 2e is provided with a water discharge pipe portion 12 covering the discharge water passage Ro, and a water supply mode Ms to a water stop mode Mr is provided between the discharge water passage Ro and the rising water passage Rm. If an upper opening/closing mechanism Vs is provided that shuts off when switching from the water stop mode Mc or the drain mode Mr to the water supply mode Ms and opens when switching from the water supply mode Ms, the discharge water passage Ro and the rising water passage Rm can be reliably opened and closed. In the water supply mode Ms, water can be smoothly supplied from the rising water passage Rm to the discharge water passage Ro, and in the draining mode Mr, air can be smoothly drawn into the rising water passage Rm.

(5) According to a preferred embodiment, the upstream end of the rising water passage Rm is cut off at the lowest position Xd of the spool portion 4s, and the upward displacement of the spool portion 4s from the lowest position Xd causes the upstream of the rising water passage Rm. A lower on-off valve mechanism portion Vf with an open end, an inner discharge passage 6 formed inside the spool portion 4s and having an inflow port 6i positioned on the lower side and an outflow port 6e positioned on the upper side, and the inner discharge passage 6, and at least the inner check valve mechanism portion Vnf for blocking the inner discharge passage 6 by a predetermined water pressure due to the tap water W flowing in from the inflow port 6i, and the outer discharge facing the outside at the lowest position Xd of the spool portion 4s. If a spool valve mechanism 4 is provided that communicates the passage 7 with the outflow port 6e, and communicates the inflow port 6i with the water supply passage Rf in a predetermined displacement section of the spool portion 4s that is upwardly displaced from the lowest position Xd. When water is supplied (stopped) from the water supply state (water supply state), the transition can be made immediately without causing a time lag, so it is possible to ensure good usability and operational feeling (comfortable operability) on the user side. can.

(6) According to a preferred embodiment, when configuring the lower opening/closing valve mechanism Vf, the valve body 13v fixed to the lower end of the spool 4s, and the water supply passageway located below the valve body 13v If a valve seat portion 13s is formed on the outer surface of Rf to abut on or separate from the valve body portion 13v, the structural surface of the lower opening/closing valve mechanism portion Vf, that is, the valve body portion Since the contact surface of 13v and the contacted surface of the valve seat portion 13s can be brought into contact or separated without sliding, it is possible to immediately respond to the opening/closing operation without any time lag.

(7) In constructing the inner check valve mechanism Vnf according to a preferred embodiment, the inner discharge passage 6 located on the inlet port 6i side is formed to have a large diameter over a predetermined length, and a valve seat hole is formed at the upper end. 14 formed in the vertical direction, and a spherical valve portion 16 accommodated in the upstream discharge passage 15, the check valve operates corresponding to a predetermined water pressure. Therefore, it can function reliably and smoothly for both tap water W with high water pressure and residual water Wr with low water pressure.

FIG. 2 is a cross-sectional side view of the spout portion of the antifreeze faucet column and its surroundings in the water stop mode according to the preferred embodiment of the present invention; Cross-sectional side view in water stop mode showing the overall structure of the antifreeze faucet column, AA line cross-sectional view in FIG. A cross-sectional side view showing the tip of the spout in the spout part of the antifreeze faucet column, Flowchart for explaining the operation method of the same antifreeze faucet column, Explanation diagram of the operation of the same antifreeze faucet column in water supply mode, Explanatory diagram of the operation of the antifreeze faucet column in the water stop mode, Explanation diagram of the operation of the same antifreeze faucet column in drain mode, FIG. 11 is an explanatory diagram of the operation of the antifreeze faucet column according to the conventional technology in the drain mode;

Next, preferred embodiments according to the present invention will be presented and explained in detail based on the drawings.

First, the configuration of the antifreeze faucet column 1 according to this embodiment will be specifically described with reference to FIGS. 1 to 4. FIG.

The exemplified non-freezing faucet column 1 does not drain water when the detected outside temperature (detected temperature) exceeds the set temperature (anti-freezing temperature) Tc, but the detected outside temperature is below the set temperature Tc. Equipped with an automatic water drain function that automatically drains the residual water Wr inside if it drops to

As shown in FIG. 2, the non-freezing water faucet column 1 is provided with a water supply riser 2 having a water discharge port 2e that branches and protrudes in the horizontal direction at the top, and an operation mechanism 3 attached to the water supply riser 2. and a spool valve mechanism portion 4 having a spool portion 4 s that is vertically displaced by the operation mechanism portion 3 . As a result, if the spool portion 4s is vertically displaced by operating the operating mechanism portion 3, the water supply mode Ms or the water stop mode Mc can be switched, and the water stop mode Mc or the water drain mode Mr can be automatically switched according to the outside temperature. can be switched with Note that G indicates the ground on which the water supply riser pipe 2 stands.

The water outlet portion 2e includes a cylindrical water outlet pipe portion 12 extending horizontally from the upper portion of the water supply riser pipe 2, and the tip opening of the water outlet pipe portion 12 is closed by a closed end portion 12c. A water discharge port 21 projecting obliquely downward is provided on the lower surface of the outer peripheral surface near the tip of the water tube portion 12 . Therefore, the water discharge port 2e has a drainage structure that allows residual water Wo inside to flow out to the outside from a water discharge port tip 2es provided at the tip of a residual prevention cap 27, which will be described later.

A thermo valve 5 shown in FIG. 1 (FIG. 2) is arranged on the central axis inside the water discharge pipe portion 12 . As a result, a water passage R (discharge water passage Ro) having a ring-shaped cross section is formed between the outer peripheral surface of the thermo valve 5 and the inner peripheral surface of the water discharge pipe portion 12 . The thermo valve 5 communicates an intake air outlet 5e located on the upstream side with the lower water passage hole 24 of the water passage R (rising water passage Rm) in the water supply riser pipe 2, and serves as an intake air inlet. The intake port 5i is arranged so as to face the inside of the water discharge pipe portion 12, that is, the inside of the discharge water passage Ro. This thermo valve 5 incorporates an intake check valve, and when the outside air temperature exceeds the set temperature Tc, it switches to the cutoff side (closed side), and the intake outlet 5e and the intake port 5i are closed. At the same time, when the outside air temperature is equal to or lower than the set temperature Tc, the air intake is switched to the intake side (open side), and intake air is permitted between the intake air outlet 5e and the air intake 5i. On the other hand, the discharge water passage Ro of the water outlet pipe portion 12 communicates with the riser water passage Rm of the water supply riser 2 via the upper water passage hole 25 .

Furthermore, the water discharge port 21 in the water discharge pipe portion 12 is fitted with a residual prevention cap 27 that is detachable from the water discharge port 21 . This residue prevention cap 27 can be used as a highly versatile residue prevention cap 27 by attaching and detaching it to various water faucet columns, including the antifreeze faucet column 1 shown in this embodiment. Note that the water outlet 21 and the residual prevention cap 27 may be integrally formed.

FIG. 4 shows an enlarged sectional view of the residual prevention cap 27. As shown in FIG. The tip surface of the residual prevention cap 27 having the opening serves as the spout tip 2es. A portion of the inner peripheral surface 27i of the residual prevention cap 27 that reaches the spout tip 2es is formed by a tapered surface 11 that gradually increases in diameter toward the downstream side in the axial direction. The tapered surface 11 has a configuration (shape) that exerts a residual prevention function Fr for discharging the residual water Wo (see FIG. 7) remaining in the discharge water conduit Ro to the outside at least in the water stop mode Mc and the drain mode Mr. .

Thus, in order to realize the residual prevention function Fr, the water discharge port 2e is configured to have a drainage structure that allows at least the residual water Wo remaining inside to flow out from the water discharge port tip 2es when the water is stopped. If a portion of the inner diameter of the water passage leading to the spout tip 2es is formed by the tapered surface 11 that gradually increases in diameter toward the downstream side in the axial direction, residual water Wo remaining inside the spout portion 2e can be removed by To enable quick, smooth and reliable discharge, and to avoid freezing of the inside of a spout part 2e and freezing of icicles occurring outside in a cold region, and to improve quality and marketability of the non-freezing faucet column 1.例文帳に追加can be done. In addition, it can be implemented relatively easily by changing the shape (processing) of the spout portion 2e, etc., and is excellent in easiness of implementation and low cost.

In this case, when forming the tapered surface 11, the outer opening diameter Lo at the tip of the tapered surface 11 is set to 12.5 mm or more, and the inclination angle Qo of the tapered surface 11 is set to 25° or more and 45° or less. desirable. If selected in this way, many types of non-freezing faucet columns based on the current water supply standards can be covered, so it can be implemented as an optimal form from the viewpoint of ensuring sufficient performance.

By the way, the tapered surface 11 of the residual prevention cap 27 exhibits an important function in relation to the antifreeze faucet column 1 according to this embodiment. That is, in the water stop mode Mc and the water drain mode Mr, which will be described later, the residual water Wo remaining inside the water discharge port 2e can be reliably discharged. If the residual water Wo cannot be reliably discharged, the intake port 5i will not function substantially, and it will be necessary to expose the water to the atmosphere via a separately formed ventilation path or the like. However, by providing the residual prevention cap 27 (residual prevention function Fr), in each of the modes Mc and Mr, the residual water Wo inside the water discharge port 2e can always be reliably discharged. Functions can be reliably secured.

On the other hand, the water supply riser pipe 2 has a double structure of an inner pipe 2i and an outer pipe 2o, and the inside of the inner pipe 2i is formed as a water passage R (rising water passage Rm). A rotatable operating rod 31 is arranged on the central axis of the rising water passage Rm, and a handle 32 integrally provided with an operating lever 32h is fixed to the upper end of the operating rod 31 . In this case, the outer peripheral surface of the operating rod 31 in the vicinity of the upper end is engaged with the inner peripheral surface of the fixing portion of the water supply riser 2 via the threaded portion 31s. This constitutes the operation mechanism section 3 that converts the rotational displacement of the handle 32 into the vertical displacement of the operation rod 31 . Further, as shown in FIG. 2 , an upper opening/closing valve mechanism Vs is provided at a portion of the water supply riser 2 facing the upper water passage hole 25 . The upper opening/closing valve mechanism Vs is formed on the ring-shaped upper valve body 33v fixed to the upper position of the operating rod 31 and on the inner peripheral surface of the water supply riser 2 below the upper valve body 33v. It is composed of the upper valve seat portion 33s.

In this manner, when configuring the water discharge port portion 2e, the water discharge pipe portion 12 covering the discharge water passage Ro is provided, and between the discharge water passage Ro and the rising water passage Rm, the switching from the water supply mode Ms to the water stop mode Mr is provided. If the upper opening/closing mechanism Vs is provided, which shuts off when switching and opens when switching from the water stop mode Mc or the water drain mode Mr to the water supply mode Ms, the discharge water passage Ro and the rising water passage Rm can be reliably opened and closed. In the water supply mode Ms, water can be smoothly supplied from the rising water passage Rm to the discharge water passage Ro, and in the draining mode Mr, air can be smoothly drawn into the rising water passage Rm.

With such a structure, when the handle 32 is rotated (closed) to the right, the operating rod 31 is displaced downward, and the upper valve body portion 33v comes into contact with the upper valve seat portion 33s. The mechanism portion Vs is switched to the closed side, and the upper end of the rising water passage Rm is cut off. On the other hand, when the handle 32 is turned leftward (opening operation), the operating rod 31 is displaced upward, and the upper valve body portion 33v is disengaged from the upper valve seat portion 33s, whereby the upper opening/closing valve mechanism is opened. The portion Vs is switched to the open side, and as shown in FIG. 2, the upper end of the rising water passage Rm is opened. That is, the rising water passage Rm and the upper water passage hole 25 communicate with each other.

On the other hand, a columnar spool portion 4s is fixed to the lower end of the operating rod 31, and this spool portion 4s is inserted through a sleeve portion 4m integrally formed with the water supply riser pipe 2. As shown in FIG. As a result, the movable spool portion 4s and the fixed sleeve portion 4m form the spool valve mechanism portion Vm, and the lower end face of the spool portion 4s is used to form the lower opening/closing valve mechanism portion Vf.

As shown in FIG. 2, the lower opening/closing valve mechanism Vf is configured so that the valve body portion 13v of the spool portion 4s closes the valve seat portion 13s at the lowest position Xd of the spool portion 4s to close the water passage R (inlet water passage). Rf) and the spool portion 4s is displaced upward from the lowest position Xd to open the water passage R. That is, the lower opening/closing valve mechanism portion Vf is formed by a ring-shaped valve body portion 13v fixed to the lower end portion of the spool portion 4s and a horizontal surface positioned outside the feed hole 29 positioned below the valve body portion 13v. It is composed of the formed valve seat portion 13s. This constitutes a lower opening/closing valve mechanism portion Vf in which the lower surface of the valve body portion 13v contacts or separates from the upper surface of the horizontally formed valve seat portion 13s. In constructing the lower opening/closing valve mechanism Vf in this manner, the valve element 13v fixed to the lower end of the spool 4s and the By forming the valve seat portion 13s that abuts on or separates from the valve body portion 13v, the structural surface of the lower opening/closing valve mechanism portion Vf, that is, the contact surface of the valve body portion 13v Since the contact surface of the valve seat portion 13s can be brought into contact with or separated from the contact surface of the valve seat portion 13s without sliding, it is possible to immediately respond to the opening/closing operation without any time lag.

On the other hand, the supply water passage Rf is formed inside the water supply riser pipe 2 so as to bypass the outer side of the sleeve portion 4 m, and the upstream side (lower side) of the supply water passage Rf is connected to the supply hole 29. In addition, the downstream side (upper side) of the supply water passage Rf is made to communicate with the rising water passage Rm.

Further, the spool valve mechanism portion Vm includes an inner discharge passage 6 formed inside the spool portion 4s. The inner discharge passage 6 has an inlet 6i opening downward and an outlet 6e opening upward of the spool portion 4s. This spool valve mechanism portion Vm communicates the later-described outer discharge passage 7 facing the outside at the lowest position Xd of the spool portion 4s and the above-described outflow port 6e. The displacement section has a function of connecting the inflow port 6i and the water passage R (inlet water passage Rf).

The inner discharge passage 6 is provided with an inner check valve mechanism Vnf. The inner check valve mechanism Vnf has a function of blocking the inner discharge passage 6 at least by a predetermined water pressure of the tap water W flowing in from the inflow port 6i. In this case, the inner check valve mechanism portion Vnf is formed in the vertical direction Fv by forming the inner discharge passage 6 located on the inlet port 6i side with a large diameter over a predetermined length and having the valve seat hole portion 14 at the upper end. and a spherical valve portion 16 housed in the upstream discharge passage 15 . By providing the inner check valve mechanism portion Vnf configured in this manner, the inner discharge passage 6 located on the inlet port 6i side is formed to have a large diameter over a predetermined length, and has the valve seat hole portion 14 at the upper end. By providing an upstream discharge passage 15 formed in the vertical direction and a spherical valve portion 16 accommodated in the upstream discharge passage 15, the check valve can be operated in response to a predetermined water pressure. Therefore, it can function reliably and smoothly for both tap water W with high water pressure and residual water Wr with low water pressure.

It is desirable that the inner check valve mechanism Vnf be provided with a spring capable of elastically displacing the ball valve portion 16 based on a predetermined water pressure. By providing such a spring, it is possible to set the biasing force on the ball valve portion 16, that is, to set a predetermined water pressure when functioning as the inner check valve mechanism portion Vnf. It is possible to further enhance the stability and reliability of the operation.

On the other hand, the sleeve portion 4m is provided with a drainage portion 36 inside which is integrated with the sleeve portion 4m. In this case, the external discharge passage 7 has an external check valve mechanism Vns that allows the flow of the residual water Wr from at least the outflow port 6e and blocks the external discharge passage 7 due to its own weight and the negative pressure of the residual water Wr. is attached. The outer check valve mechanism portion Vns is formed by forming the outer discharge passage 7 positioned on the spool portion 4s side to have a large diameter over a predetermined length, and having a valve seat hole portion 37h at the lower end. A discharge passage 37 and a spherical valve portion 38 housed in the downstream discharge passage 37 are provided. If such an outer check valve mechanism portion Vns is attached, the check valve function in the outer discharge passage 7 can be ensured. can be secured.

Thus, according to the antifreeze faucet column 1 according to the present embodiment, the upstream end of the rising water passage Rm is blocked at the lowest position Xd of the spool portion 4s, and the spool portion 4s from the lowest position Xd is closed. A lower on-off valve mechanism portion Vf that opens the upstream end of the rising water passage Rm by upward displacement of , and an inlet port 6i that is formed inside the spool portion 4s and positioned on the lower side and an outlet port 6e that is positioned on the upper side. an inner discharge passage 6, an inner check valve mechanism portion Vnf attached to the inner discharge passage 6 and shutting off the inner discharge passage 6 by a predetermined water pressure of at least the tap water W flowing in from the inflow port 6i, and a spool portion 4s At the lowest position Xd, the outer discharge passage 7 facing the outside and the outflow port 6e are communicated, and in a predetermined displacement section of the spool portion 4s upwardly displaced from the lowest position Xd, the inflow port 6i and the supply water passage Rf are communicated. If the spool valve mechanism 4 is provided, when water is supplied (stopped) from the water stop state (water supply state), it can be immediately changed without causing unnecessary time lag or discomfort, which is good for the user side. There is an advantage that it is possible to ensure good usability and operational feeling (comfortable operability).

Next, the functions (operations) of the antifreeze faucet column 1 according to the present embodiment will be described according to the flowchart shown in FIG. 5 while referring to FIGS. 6 to 8. FIG.

It is now assumed that the antifreeze faucet column 1 is in the water stop mode Mc (step S1). In the water stop mode Mc, the handle 32 is rotated (closed) to the right, and the operating rod 31 is displaced downward. 13s, and the upper valve body portion 33v contacts the upper valve seat portion 33s. As a result, the lower opening/closing valve mechanism Vf blocks the water passage R (inlet water passage Rf), and the upper opening/closing valve mechanism Vs blocks the upper end of the rising water passage Rm.

On the other hand, when switching from the water stop mode Mc to the water supply mode Ms, the following is performed (step S2). First, the user rotates (opens) the handle 32 to the left (step S3). At this time, due to the valve structure of the lower opening/closing valve mechanism Vf, the spool portion 4s is displaced upward simultaneously with the start of the rotation operation of the handle 32 (step S4). As a result, the valve body portion 13v is immediately separated from the valve seat portion 13s. That is, almost simultaneously with the opening operation of the handle 32, the lower opening/closing valve mechanism Vf shifts to the opening side. That is, it is possible to immediately respond to the opening operation without any time lag and start supplying water (step S5).

When the water supply is started, the tap water W in the water pipe (not shown) connected to the connection port 41 flows into the water supply passage Rf through the water supply hole 29, and initially also flows into the inner discharge passage 6 from the inflow port 6i. Enter (step S6). When the tap water W enters the inner discharge passage 6, the water pressure causes the ball valve portion 16 to be displaced upward, and the ball valve portion 16 contacts the valve seat hole portion 14 (step S7). As a result, the internal discharge passage 6 is blocked. Therefore, there is no problem that water is drained when water supply is started (step S8). Further, when the handle 32 is rotated, the spool portion 4s is also displaced upward, and the inlet 6i is blocked by the inner wall of the sleeve portion 4m. As a result, all of the tap water W is supplied to the water passage R (the supply water passage Rf), and the water supply mode Ms is maintained. If the inlet 6i is blocked by the inner wall, the ball valve portion 16 returns (drops) to the lower position (steps S9 and S10).

Further, as shown in FIG. 6, the upper opening/closing valve mechanism portion Vs is also displaced to the opening side in conjunction with the lower opening/closing valve mechanism portion Vf. As a result, the upper valve body portion 33v is separated from the upper valve seat portion 33s, and the tap water W in the rising water passage Rm flows through the upper water passage hole 25 into the discharge water passage Ro and passes through the residual prevention cap 27. It is discharged to the outside from the spout tip 2es. In this case, the outside air temperature is usually higher than the temperature at which freezing starts, that is, exceeds the predetermined set temperature Tc for judging freezing. 5e and inlet 5i are in a closed state. Therefore, the thermo valve 5 is switched to the closed side, and tap water W does not enter the interior of the thermo valve 5 .

On the other hand, when the water supply mode Ms is switched to the water stop mode Mc, the following is performed (step S11). First, the handle 32 is rotated rightward (closed) (step S12). As a result, the operating rod 31 and further the valve body portion 13v are displaced downward (step S13). Then, when the valve body portion 13v is displaced downward to the lowest position Xd, it abuts against the valve seat portion 13s, and the lower opening/closing valve mechanism portion Vf blocks the supply water passage Rf. In this case, due to the structure of the lower opening/closing valve mechanism Vf, it is possible to immediately respond to the closing operation without any time lag. That is, the water stop state can be achieved immediately at the timing when the valve body portion 13v comes into contact with the valve seat portion 13s. Further, the downward displacement of the spool portion 4s opens the inlet 6i of the inner discharge passage 6, so that the residual water Wr in the water supply passage Rf flows into the inner discharge passage 6 (steps S14 and S15). ). As a result, the ball valve portion 16 is displaced upward and comes into contact with the valve seat hole portion 14, thereby blocking the internal discharge passage 6 (step S16).

On the other hand, when shifting to the water stop mode Mc, as shown in FIG. 7, the tap water W remains in the discharge water passage Ro in the water outlet pipe portion 12 as residual water Wo. Fr, that is, the function of the tapered surface 11 provided on the residual prevention cap 27, ensures that the water is discharged to the outside from the tip 2es of the spout.

The tap water W in the rising water passage Rm and the supply water passage Rf remains as residual water Wr. , the set temperature Tc is exceeded, and the thermo valve 5 is in the OFF state, so that the rising water passage Rm and the supply water passage Rf are sealed. As a result, the residual water Wr is maintained in a residual state, and the water stop mode Mc is maintained in this state (steps S17, S1).

After that, in the water stop mode Mc, it is assumed that the outside air temperature drops below the set temperature Tc (step S17). In this case, the thermo valve 5 is automatically turned on and switched to the intake side. That is, as shown in FIG. 8, a state is established in which ventilation from the intake port 5i to the intake air outlet 5e is permitted (step S18). As a result, intake air Ai is performed along the arrow indicated by the dashed-dotted line. Specifically, ventilation Ai is allowed in the following route: spout tip 2es→discharge water passage Ro→intake port 5i→thermo valve 5→intake outflow port 5e→lower side water passage 24→rising water passage Rm. As a result, the internal pressure (negative pressure) of the rising water passage Rm and the supply water passage Rf is released (step S19).

Then, the internal pressure is released to shift to the drain mode Mr (step S20). In the drain mode Mr, residual water Wr is drained along the dotted line arrow shown in FIG. Specifically, the residual water Wr in the rising water passage Rm is discharged to the outside through the inlet 6i→the inner discharge passage 6→the outer discharge passage 7. FIG. At this time, the ball valve portion 38 is separated from the valve seat hole portion 37h, and the protective cover 42 is displaced upward to allow water flow. When draining is completed, the water stop mode Mc in which draining is completed is maintained (steps S21, S1).

As described above, the antifreezing water faucet column 1 according to the present embodiment has, as a basic configuration, at least in the water stop mode Mc and the drain mode Mr, a residual Since the prevention function Fr is provided and the intake port 5i for inflowing the intake air of the thermo valve 5 disposed inside the water discharge port portion 2e faces the inside of the discharge water passage Ro, the air remains in the discharge water passage Ro. The residual water Wo can be reliably discharged to the outside by the residual prevention function Fr, and in the water stop mode Mc (drainage mode Mr), the discharge water passage Ro can always be emptied. As a result, even when the thermo valve 5 is disposed inside the discharge water passage Ro, the intake port 5i of the thermo valve 5 can be directly exposed to the discharge water passage Ro. As a result, a complicated ventilation passage to be formed around the water discharge port 2e becomes unnecessary, and the water discharge port 2e can be simplified and miniaturized, and the cost can be reduced. Since it can be protected, it is possible to avoid troubles and failures such as clogging of the ventilation passage with dust.

Although the preferred embodiments have been described in detail above, the present invention is not limited to such embodiments, and detailed configurations, shapes, materials, quantities, numerical values, etc. do not deviate from the gist of the present invention. Any change, addition, or deletion can be made within the range.

For example, the operation mechanism 3 is operated by the handle 32 integrally provided with the operation lever 32h, but various forms of the handle 32 can be applied to the handle 32, and the handle 32 can be an automatic type remotely operated by an electric motor or the like. A semi-automatic type is not excluded. Further, although the contact surface between the valve body portion 13v and the valve seat portion 13s constituting the lower opening/closing valve mechanism portion Vf is formed by a flat horizontal surface, it may be formed by an inclined surface such as a tapered surface. Furthermore, the inner check valve mechanism portion Vnf preferably uses the valve seat hole portion 14 and the ball valve portion 16, but other configurations that exhibit similar functions are not excluded. Similarly, although an example in which the valve seat hole portion 37h and the ball valve portion 38 are used as the outer check valve mechanism portion Vns, another configuration that exhibits the same function may be used. On the other hand, although the case where the intake port 5i provided in the thermo valve 5 is provided on the peripheral surface of the thermo valve 5 itself is shown, any other position of the thermo valve 5 itself can be selected.

INDUSTRIAL APPLICABILITY The antifreezing faucet pole according to the present invention can be used for various antifreezing faucet poles having a water supply riser installed outdoors such as in the garden of a house in cold regions.

1: antifreeze faucet column, 2: water supply riser pipe, 2e: spout portion, 2es: spout tip, 3: operation mechanism portion, 4: spool valve mechanism portion, 4s: spool portion, 5: thermo valve, 5i: intake port, 6: inner discharge passage, 6i: inflow port, 6e: outflow port, 7: outer discharge passage, 11: tapered surface, 12: water discharge pipe portion, 13v: valve body portion, 13s: valve seat portion, 14: valve seat hole, 15: upstream discharge passage, 16: ball valve portion, Ms: water supply mode, Mc: water stop mode, Mr: drain mode, R: water passage, Ro: discharge water passage, Rm: vertical Upper water passage, Rf: supply water passage, W: tap water, Wo: residual water, Fr: residual prevention function, Lo: outer opening diameter, Qo: gradient angle, Vs: upper opening/closing mechanism, Vf: lower opening/closing valve Mechanism, Vnf: Inner check valve mechanism, Xd: Lowermost position

Claims (7)

In addition to having a water supply riser having a water discharge port at the top, an operation mechanism attached to the water supply riser and a spool that is vertically displaced by this operation mechanism allow water supply mode, water stop mode, or water drain mode. a spool valve mechanism that can be switched to and from, and a thermo valve is disposed in the discharge water passage inside the water discharge port, and at least when the outside temperature drops below a set temperature, the thermo valve is switched to the intake side, In the non-freezing faucet column that allows air intake to the rising water passage inside the water supply riser pipe sealed by the water stop mode and shifts to the water drain mode, at least in the water stop mode and the water drain mode A residual prevention function for discharging residual water remaining in the discharge water passage to the outside is provided, and an intake port for inflow of intake air of the thermo valve disposed inside the water discharge port is disposed inside the discharge water passage. An antifreeze faucet pillar characterized by facing the The residual prevention function is to configure the spout portion to have a drainage structure that allows at least residual water remaining inside to flow out from the tip of the spout when the water is stopped, and to reduce the inner diameter of the water passage leading to the tip of the spout. 2. The non-freezing water faucet column according to claim 1, characterized in that a part thereof is formed by a tapered surface whose diameter gradually increases toward the downstream side in the axial direction. 3. The tapered surface according to claim 2, wherein the tapered surface has an outer opening diameter of 12.5 mm or more at the tip of the tapered surface, and a gradient angle of the tapered surface set to 25 degrees or more and 45 degrees or less. Antifreeze faucet column. The water discharge port portion includes a water discharge pipe portion covering the discharge water passage, and between the discharge water passage and the rising water passage, shuts off when switching from the water supply mode to the water stop mode, and the water stop. 4. The non-freezing water faucet column according to claim 1, further comprising an upper opening/closing mechanism that is opened when the mode or the drain mode is switched to the water supply mode. A lower opening/closing valve mechanism that blocks the upstream end of the rising water passage at the lowest position of the spool portion, and opens the upstream end of the rising water passage by upward displacement of the spool portion from the lowest position. an inner discharge passage formed inside the spool portion and having an inlet located on the lower side and an outlet located on the upper side; tap water attached to the inner discharge passage and flowing in from at least the inlet; and an inner check valve mechanism that blocks the inner discharge passage by a predetermined water pressure, and the outer discharge passage facing the outside and the outflow port are communicated at the lowest position of the spool portion, and rises from the lowest position. 2. The non-freezing water faucet column according to claim 1, further comprising a spool valve mechanism that communicates the inlet and the water passage in a predetermined displacement section of the displaced spool. The lower opening/closing valve mechanism is positioned below the valve body fixed to the lower end of the spool and formed on the outer surface of the water passage. 6. The non-freezing water faucet column according to claim 5, comprising a valve seat portion that abuts against or separates from. The inner check valve mechanism part is formed such that the inner discharge passage located on the inlet side is formed to have a large diameter over a predetermined length, and an upstream discharge passage formed in the vertical direction having a valve seat hole at the upper end. 6. The non-freezing water faucet column according to claim 5, comprising: , and a spherical ball valve portion accommodated in the upstream discharge passage.

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