JP2015140915A - Low temperature operation valve - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a low temperature operation valve capable of reducing disadvantages of entering foreign objects accumulated in a water feeding pipe and inhibiting an action of the valve at the time of valve operation under a low surrounding air temperature.SOLUTION: This invention is arranged under a state in which an extremity end having an inlet port is placed adjacent to a part of a water feeding pipe, a bulged-out part protruding into the water feeding pipe is arranged at the extremity end adjacent in the water feeding pipe at the low temperature operation valve constituted to operate to open a passage from the inlet port so as to prevent freezing of water remained in the water feeding pipe of a plug under a state in which a thermo-element is operated at the time of low surrounding air temperature and then the inlet port is opened near the top part of the bulged-out part. The bulged-out part is formed to have a surface (a tapered surface, a curved surface and the like) inclined from a part near the top part to a base end side.

Description

  The present invention is attached to a water supply pipe such as a water supply pipe near a faucet, and opens the valve to prevent freezing of water remaining in the water supply pipe of the faucet when the outside air is cold, and the water in the pipe is made outside. More particularly, the present invention relates to a low-temperature operating valve configured to reduce foreign substances accumulated in a water supply pipe from being taken into the valve through an inflow port.

  Conventionally, it is installed in water pipes or water heaters such as water pipes that may freeze, and when the temperature falls to the freezing temperature at night, etc., the water temperature or There is known a low temperature operation valve that senses the outside temperature, opens the valve, and discharges the water to prevent freezing of the water in the water supply pipe or appliance.

  For example, a low temperature operation valve is known in which the bottom of a thermo element case is used as a valve body and a return spring is biased around the thermo element case (see, for example, Patent Document 1).

  Here, such a low temperature operation valve is generally mounted in such a posture as to be directed downward in the vertical (gravity) direction with respect to a water supply pipe or the like extending in the horizontal direction, and the water in the pipe is opened when the outside air is cold. Can be discharged downward.

Japanese Utility Model Publication No. 61-124769

  By the way, in the conventionally known low temperature operation valve device as described above, the connection portion of the low temperature operation valve with respect to the water supply pipe is in a portion recessed in the flow path in the pipe from the surroundings. It is often provided, and foreign matters such as dust and cast sand in the pipe are likely to accumulate. The accumulated foreign matter enters the valve portion from the inlet of the low temperature operation valve together with water flowing into the valve when the low temperature operation valve is opened, and adheres to the valve portion to obstruct the valve closing operation. there were.

  In addition, foreign matter may accumulate and adhere to the water passage from the water passage to the valve portion, and thus water may not flow even when the low temperature operation valve is opened.

  The present invention has been made in view of such circumstances, and foreign matter accumulated in the water supply pipe enters into the valve when operating at a low temperature of the outside air, and hinders the movement of the valve body. An object of the present invention is to obtain a low temperature operation valve configured to reduce the above.

  In order to meet such a purpose, the low temperature operation valve according to the present invention (the invention according to claim 1) is disposed with a tip having an inlet facing a part of the water supply pipe, and the thermo element at a low temperature of the outside air Is a low-temperature operation valve that operates to open the passage from the inflow port in order to prevent freezing of water remaining in the water supply pipe of the faucet, and faces the water supply pipe The bulging part which protrudes in the said water supply piping was provided in the front-end | tip, and the said inflow port was opened near the top part of this bulging part, It is characterized by the above-mentioned.

  The low temperature operation valve according to the present invention (the invention described in claim 2) is characterized in that, in claim 1, the bulging portion is formed in a shape having a surface inclined from the vicinity of the top portion to the base end side. And

  The low temperature operation valve according to the present invention (the invention according to claim 3) is the low temperature operation valve according to claim 1 or 2, wherein a groove formed by a screw groove or the like is formed in a portion of the bulging portion protruding into the water supply pipe. It is characterized by.

  As described above, according to the low temperature operation valve according to the present invention, since the bulging portion protruding into the water supply pipe is provided at the tip having the inlet of the low temperature operation valve, the foreign matter in the water supply pipe is operated at a low temperature. It is possible to make it difficult to enter the valve portion through the inlet of the valve, thereby reducing problems such as the entry of foreign matter into the valve portion, adhesion to the valve portion, and obstructing the valve closing operation. .

  That is, it is possible to reduce problems such as incomplete valve closing caused by foreign matter entering the valve portion and difficulty in opening the valve due to foreign matter sticking when the valve is closed.

  In addition, foreign matter accumulated on the side surface of the inlet during water flow is pushed away and easily discharged to the outside from the faucet of the faucet, and problems due to the accumulation of foreign matter are eliminated.

  Furthermore, according to the present invention, since a space is provided around the bulging portion having an inlet in the water supply pipe, foreign matter can be prevented from entering the valve portion, When opening and closing the faucet, foreign matter can be efficiently discharged from the water supply pipe to the outside.

It is a sectional side view showing one embodiment of the low temperature operation valve concerning the present invention. It is a figure which shows the state in the water supply piping of the bulging part provided in the front-end | tip which has the inflow port of the low temperature operating valve of FIG. It is the schematic explanatory drawing which illustrated typically the bulging part which is the principal part of the low-temperature operating valve which concerns on this invention in FIG. 1, FIG. It is a figure for demonstrating the outline | summary of the faucet to which the low temperature operation valve which concerns on this invention is applied. It is a schematic sectional drawing which shows another embodiment of the low temperature operating valve which concerns on this invention. It is a schematic sectional drawing which shows other embodiment of the low temperature operating valve which concerns on this invention.

1 to 4 show an embodiment of a low temperature operation valve according to the present invention.
In these drawings, the use state of the low temperature operation valve 10 to which the present invention is applied will be described with reference to FIG.
That is, reference numeral 1 denotes a faucet column, and a faucet 3 is provided at the tip of a water supply pipe 2 that branches from the faucet column 1 and extends in the horizontal direction. A low temperature operation valve 10 is provided so as to hang from a part of the water supply pipe 2 between the faucet 3 and the faucet column 1.

  In the faucet column 1 described above, when the outside air temperature decreases with the faucet 3 closed, the water remaining in the faucet water supply pipe freezes and the water supply pipe 2 etc. is destroyed due to volume expansion. Will be. In order to prevent such freezing, the low temperature operation valve 10 is provided. The low temperature operation valve 10 is opened when the outside air is at a low temperature, and operates to discharge the water in the water supply pipe 2.

  More specifically, the low-temperature operating valve 10 includes a substantially cylindrical housing 11, and a thermo element 20 containing a wax (not shown) as a thermal expansion body is provided in the interior thereof so as to be movable up and down. It is elastically supported by a pair of coil springs 21 and 22.

  Here, the thermo element 20 includes an upper small diameter portion 24 having a valve body 23 at the tip and a lower small diameter portion 25 above and below the large diameter portion 20a. In addition, the wax mentioned above is enclosed in the upper small diameter part 24, and functions as a temperature sensing part.

The lower small diameter portion 25 is provided with a piston rod 25a that can be moved back and forth in accordance with the thermal expansion and contraction of the wax.
That is, when the outside small temperature portion 24 as the temperature sensing portion of the thermo element 20 has an outside air temperature equal to or higher than the normal air temperature (for example, 0 ° C. or 5 ° C.), the wax thermally expands, and the piston rod 25a protrudes downward (protrudes). The tip portion of the thermo-element 20 moves relatively upward in the housing 11 by abutting against a part of the guide member 28 that also serves as a spring retainer of the coil spring 21. The valve body 23 provided at the upper end portion is operated in the valve closing direction.

On the contrary, when the outside air temperature becomes a low temperature state, the wax is thermally contracted, the piston rod 25a is retracted into the thermo element 20, and the thermo element 20 is moved downward in the housing 11 by the urging force of the coil spring 22. Thereby, the valve body 23 is operated in the valve opening direction.
Here, the “low temperature state” refers to a state where the air temperature is, for example, around 0 ° C. or lower and the water temperature remaining in the water supply pipe 2 is frozen.

  A small-diameter connection end 13 protrudes from the upper end of the housing 11 (the tip on the water supply pipe 2 side), and a threaded portion 13a is formed on the outer periphery thereof. An inlet passage 14 is formed along the axis, and an inlet 15 is formed at the tip of the connection end portion 13. In addition, 10a is an O-ring for sealing the said part at the time of the assembly | attachment to the water supply piping 2 of this low temperature operating valve 10 by the thread part 13a.

  The inner end of the inlet passage 14 opens into the housing 11, and the valve body 23 is opened and closed to form a valve portion.

  In such a configuration, the low temperature operation valve 10 is configured to maintain a closed state when the outside air temperature is not in a low temperature state. That is, when the outside air temperature is a temperature other than a low temperature, for example, 5 ° C. or 0 ° C. or more, the thermo element 20 is in a state in which the wax thermally expands and the piston rod 25a protrudes. As shown in FIG. 1, the valve body 23 is configured to maintain the inlet passage 14 in a closed state.

When the low temperature operation valve 10 is in the closed state, the thermoelement 20 is always urged in the valve opening direction by the coil spring 22, but in the normal state, the downward pushing force by the piston rod 25a is more preferable. Therefore, the entire thermo element 20 is lifted upward and the valve body 23 is kept closed.
Here, in the normal state, the urging force of the coil spring 22 <the pushing force of the piston rod 25a downward, and in the low temperature state, the urging force of the coil spring 22> the pushing force of the piston rod 25a. This can be easily understood from the fact that when the temperature becomes low, there is no force to push the piston rod 25a due to thermal contraction of the wax, and the piston rod 25a is retracted into the thermo element 20.

  On the other hand, when the outside air temperature becomes a low temperature state (5 ° C. or lower or 0 ° C. or lower), the wax is thermally contracted, and the piston rod 25 a is retracted into the thermo element 20 by the urging force of the coil spring 22, thereby It operates to open the inlet passage 14. Thereby, the water in the water supply pipe 2 falls through the clearance passage between the housing 11 and the thermo element 20, and is discharged from the lower end opening of the housing 11 to the outside. In addition, the flow of water falling through the gap between the housing 11 and the thermo element 20 when the low temperature operation valve 10 is opened is indicated by a dashed arrow in FIG.

  Here, as described above, the coil spring 22 maintains the state in which the thermo element 20 is urged in the valve opening direction of the valve body 23 and the piston rod 25a is retracted into the thermo element 20 as shown in FIG. Thus, the thermo element 20 is moved downward in the housing 11.

  On the other hand, the coil spring 21 elastically supports the thermo element 20 in the housing 11 and also has an overstroke absorbing function. That is, when the outside air temperature rises, the thermal expansion of the wax increases, and the piston rod 25a jumps out more than necessary, and the components of the low temperature operation valve 10, such as the housing 11, may be destroyed. The function of absorbing the overstroke of the piston rod 25a at this time is provided.

  In other words, the coil spring 21 contracts and the guide member 28 moves downward by the amount of the piston rod 25a protruding, so that the coil spring 21 absorbs this movement, and the piston rod 25a protrudes too much. However, the amount of protrusion is absorbed when the coil spring 21 contracts.

  According to the present invention, in the low-temperature operating valve 10 having the above-described configuration, a part of the water supply pipe 2 to the faucet 3 of the faucet column 1 flowing in a certain direction is arranged with the inlet 15 facing the outside air. A low temperature operation valve 10 that operates to prevent freezing at a low temperature and opens the inlet passage 14 from the inlet 15, and supplies water to the connection end 13 on the inlet 15 side facing the water supply pipe 2. A bulging portion 30 protruding in the pipe 2 is provided, and the inflow port 15 is opened at the tip of the bulging portion 30.

Here, as is apparent from the schematic diagram of FIG. 3, the bulging portion 30 is formed in a truncated cone shape having a surface inclined from the vicinity of the distal end to the proximal end side, such as a tapered surface or a curved surface. You may do it.
The shape shown in FIG. 1 shows a case where the bulging portion 30 has an end portion having a curved surface shape.

  According to the configuration described above, the bulging portion 30 that protrudes into the water supply pipe 2 is provided at the end of the low temperature operation valve 10 having the inlet 15, so that foreign matter in the water supply pipe 2 It is possible to make it difficult for the valve portion to enter through the inflow port 15, thereby reducing problems such as conventional entry of foreign matter into the valve portion, adhesion to the valve portion, and hindering valve closing operation.

  That is, it is possible to reduce problems such as incomplete valve closing caused by foreign matter entering the valve portion and difficulty in opening the valve due to foreign matter sticking when the valve is closed.

  In addition, the foreign matter accumulated on the side surface of the inlet during water flow is pushed away and is easily discharged to the outside from the faucet 3 of the faucet column 1, and the problem due to the accumulation of foreign matter is solved.

  Furthermore, according to the present invention, since the space (indicated by S in FIG. 3) in which foreign matter accumulates is provided around the bulging portion 30 in the water supply pipe 2 and having the inlet 15, When the faucet 3 is opened and closed, foreign matter can be efficiently discharged from the water supply pipe 2 to the outside as shown in FIG.

Needless to say, the present invention is not limited to the structure described in the above-described embodiment, and the shape, structure, and the like of each part constituting the low-temperature operating valve 10 can be appropriately modified and changed.
For example, as the bulging portion characterizing the present invention, as shown in FIGS. 1 and 3, the case where the bulging portion is formed in a substantially truncated cone shape is illustrated, but it is needless to say that the bulging portion is not limited to this. As shown in FIG. 5, a small-diameter cylindrical portion 41 may be provided and an inflow port 15 may be opened at the end thereof.

  In short, it is only necessary that the inlet portion protrudes into the water supply pipe, and it is a bulging portion having a tapered shape, a screw shape, a combination of the taper and the screw shape, and the inlet port protrudes into the water supply pipe. It suffices to open at the position.

  Here, in FIG. 6, a thread groove 42 may be formed around the bulging portion 30 having the truncated cone shape shown in FIG. 3. In this way, the flow of water flowing in the water supply pipe 2 flows along the thread groove 42, so that it flows as a spiral flow, a spiral flow, and foreign matter that accumulates around the bulging portion 30 as much as possible. It can be drained and discharged to the outside.

  Moreover, although embodiment mentioned above demonstrated the case where the low temperature operation valve was provided in the water supply piping 2 of the faucet pillar 1, it is not limited to this.

DESCRIPTION OF SYMBOLS 1 Faucet pillar 2 Water supply piping 3 Faucet 10 Low temperature operation valve 11 Housing 13 Small diameter connection end part 13a Screw part 14 Inlet passage 15 Inlet 20 Thermo element 21,22 Coil spring 23 Valve body 25a Piston rod 30 Swelling part

Claims (3)

The flow pipe is arranged with a tip having an inlet facing a part of the water supply pipe, and the flow is prevented in order to prevent water remaining in the water supply pipe of the water faucet by operating the thermo element when the outside temperature is low. A cold operated valve that operates to open a passage from the inlet,
A low-temperature operating valve characterized in that a bulging portion protruding into the water supply pipe is provided at a tip facing the water supply pipe, and the inlet is opened near the top of the bulge. The low temperature operation valve according to claim 1,
The low-temperature operating valve, wherein the bulging portion is formed in a shape having a surface that is inclined from the vicinity of the top to the base end side. The low temperature operation valve according to claim 1 or 2,
A low temperature operation valve, wherein a groove is formed in a portion of the bulging portion protruding into the water supply pipe.

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