JP4476148B2 - Automatic water stop antifreeze faucet column - Google Patents

Description

  The present invention relates to an antifreeze faucet column that drains water in a cold region to prevent freezing, and is configured to automatically stop water when a water leak occurs. It relates to a plug column.

Conventionally, the antifreeze faucet column has been designed to prevent freezing due to drainage by a switching valve that switches between water supply and drainage as described in Patent Document 1, for example, but it seals the drainage mechanism passage opening / closing part that is most likely to occur. No measures are taken against water leakage due to wear of the O-ring.
JP 2004-27567 A

  However, in the unlikely event that a water leak occurs due to a failure of the O-ring set in the drain hole passageway opening / closing section, the drainage due to the water leak will continue to drip into the ground from the drain hole buried in the ground. It is difficult to detect from the outside, and only the meter goes up, causing a great deal of trouble to the user and causing trouble.

  The present invention is intended to address the above-described problems, and is a switching piston provided with a seal mechanism portion that opens and closes a water passage to the drainage mechanism and a seal mechanism portion that opens and closes the water passage to the water supply side. Even if water leakage occurs due to wear of the O-ring that seals the drainage mechanism water passage opening and closing part, the seal mechanism that opens and closes the water supply passage rises to close the water supply passage communicating with the drainage mechanism and cause water leakage Configured to prevent.

  That is, when water leaks, the water supply to the drainage mechanism is continued and the water pressure on the water supply side is maintained, but the water supply pressure to the faucet attached to the bushing is lowered, so the water pressure on the water supply side automatically switches the piston. A seal mechanism that pushes up and opens and closes the water supply path blocks and closes the water supply path that communicates with the drainage mechanism.

  Since the water passage to the water supply side is blocked, the water supply to the faucet is also stopped and the user can detect and respond to the occurrence of water leakage, and the drainage will flow down into the ground for a long time. It is possible to reliably prevent the state.

  Furthermore, the upper part of the seal mechanism part that opens and closes the water passage to the drainage mechanism provided at the lower part of the piston rod is switched to the seal mechanism part that seals the upper end of the piston guide frame, and the lower part of the seal mechanism part that opens and closes the water passage to the water supply path Is provided with a sealing mechanism for sealing the gap between the guide frame supporting the lower end of the switching piston and the watertightness of the piston and the guide frame is complemented to stabilize the operation of the switching piston.

In addition, a pressure release hole that communicates with the drainage mechanism water passage from the lower end of the switching piston is set in the switching piston to release the internal pressure generated in the guide frame that supports the lower end of the switching piston to the drainage mechanism water passage, so that the switching piston can be operated vertically. To be done.

Embodiments of the present invention will be described below with reference to the drawings. 1 is an outer cylinder of a faucet column, and a cap handle 11 is rotatably covered at the top, a support cylinder 2 having a lower end connected to a water supply pipe and a bushing 21 and a drainage mechanism 22 provided on the side. Further, a piston rod 3 that is moved up and down by the rotation of the cap handle 11 is fitted in the support cylinder 2.

A handle shaft 12 is fixed to the cap handle 11 with a spacer 18 sandwiched by a screw 13 and a handle shaft presser 16 via a handle receiver 14.
The handle shaft 12 has a lower end portion which is an insertion hole 15 into which the top portion of the piston rod 3 is inserted. The handle shaft 12 is provided opposite to the peripheral wall of the upper end portion. The guide grooves 17a and 17b are formed.

  Vertical grooves 23, 23 provided on the top of the piston rod 3 inserted into the insertion hole 15 leaving the vertical working space 15a so as to oppose the upper peripheral wall of the upper joint body 2A of the support cylinder 2, and the above Parallel pins 31 are driven through the guide slots 17a and 17b.

  When the cap handle 11 is rotated, the parallel pin 31 whose position is fixed in the vertical direction by the vertical grooves 23 and 23 of the upper joint body 2 </ b> A rotates only the handle shaft 12 by the rotation of the handle shaft 12. Since the pin 31 is fixed in the vertical direction and cannot rotate, the pin 31 is forcedly guided by the movement of the guide groove holes 17a and 17b to move up or down, and the piston rod 3 is moved up and down.

  The support cylinder 2 is composed of an upper joint body 2A having a bushing 21 and a lower joint body 2B having a drainage mechanism 22, and is connected by a steel pipe 2C through a pipe end core 24, and on the outer periphery of the steel pipe 2C. The heat insulating material 25 is covered, and the piston rod 3 is fitted inside.

  The piston rod 3 is configured by connecting a switching piston 3B with an upper piston 3A and a switching piston 3B, each of which is configured as an intake piston 32 having a parallel pin 31 set at the upper portion and a lower portion opening and closing an air inflow passage. The seal mechanism 3b for sealing the upper end of the switching piston guide frame 26, the seal mechanism 3c for opening and closing the water passage to the drainage mechanism, the seal mechanism 3d for opening and closing the water passage to the water supply passage, and the lower end of the switching piston are supported. Sealing mechanism portions 3e are provided for sealing gaps between the guide frame 27 and the peripheral wall of the guide frame 27, and O-rings 4 are fitted into the respective sealing mechanism portions.

  Further, the switching piston 3B is provided with a pressure release hole 34 communicating from the lower end to the drainage mechanism water passage so that the internal pressure generated when the switching piston moves up and down in the guide frame 27 is drained to the drainage mechanism water passage. It has become.

  The drainage mechanism 22 is closed at the upper end with a cap 22a, and a drainage hole 22b is opened in a side portion, and a ball check valve 22c is fitted to prevent backflow from the drainage hole or the like.

  The antifreeze faucet column configured in this way is normally in a state in which the piston rod 3 is lowered, and the seal mechanism 3a of the intake piston 32 communicates with the intake gap and the seal mechanism 3c communicates with the drainage mechanism. Since the water passages 22d are respectively closed, when the faucet (not shown) attached to the bushing 21 is opened, the water is not subjected to atmospheric pressure from the upper part, and the support cylinder 2 is supplied by the supply water pressure from the main pipe. The water is discharged from the faucet through the water passage 29 on the side of the switching piston guide frame 26 from the lower end water supply port 28.

  When draining residual water in the faucet column to avoid freezing, the cap handle 11 is rotated 45 degrees and the parallel pin 31 is moved to the intermediate through position of the guide slots 17a and 17b, and the piston rod 3 is lifted. As a result, the seal mechanism 3d closes the water passage 22d leading to the drainage mechanism and the gate water passage 22e leading to the water passage 29, and the water supply from the main pipe is stopped first.

  Further, if the piston rod 3 is further lifted by turning the parallel pin 31 to the top dead center of the guide slots 17a and 17b by rotating 45 degrees, the seal mechanism 3c opens the water passage to the drainage mechanism. At the same time, the seal mechanism 3a of the intake piston 32 opens the intake gap, so that the residual water receives air pressure from the upper part and flows into the drainage mechanism and is drained from the drainage hole 22b.

  The normal operation is as described above. Here, the case where the seal function is deteriorated due to the O-ring of the seal mechanism portion 3c that is most likely to be worn or detached will be described. The water supply pressure from the water supply port 28 is as follows. Although it also passes through the water passage 29, the drainage from the drainage mechanism is also generated through the seal mechanism 3c at the same time.

  Since water leakage from the sealing mechanism 3c occurs only when the intake piston 32 closes the intake passage, when the faucet is closed, the water supply pressure is concentrated on the drainage mechanism 22 side where the sealing function is reduced, and the switching piston Since the water pressure on the upper side is lowered, the water pressure is applied to the sealing mechanism portion 3b where the sealing function is maintained, and the piston rod 3 is pushed up.

  When the piston rod 3 is pushed up, the seal mechanism 3d rises to close the water passage 22d to the drainage mechanism and the gate water passage 22e leading to the water passage 29, and the water supply from the main pipe is blocked and automatically stopped. Water is what is done.

Since the present invention is configured as described above, in response to a water leak that has conventionally resulted in wasteful flowing of tap water into the ground because it is difficult to detect, it automatically occurs when a water leak occurs. The water supply channel was closed and water was saved to save water.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 shows an embodiment of an automatic water-stop antifreeze faucet column according to the present invention, and is a side view of the entire structure in which a central body portion is omitted and the whole is a longitudinal section. Similarly, the overall appearance of the automatic water-stop antifreeze faucet column Similarly, it is an exploded perspective view of the structural member showing the relationship between the rotation of the cap handle and the vertical movement of the piston rod. Similarly, it is a disassembled perspective view of the structural member which shows the handle shaft, piston rod top part, and the upper joint body fitting-like hook of a support cylinder. Similarly, it is a side view of a handle shaft alone showing a set-up rod with a slot facing the spiral skew guide slot as a perspective view. Similarly, it is a vertical cross-sectional side view of the tip portion of the antifreeze faucet column showing the operating rod in the lowered state of the switching piston. Similarly, the piston rises due to poor sealing of the drainage mechanism water passage open / close seal mechanism portion of the switching piston, and the water passage open / close seal mechanism portion to the water supply passage closes the water passage to the drainage mechanism and the gate water passage to the faucet water passage It is a longitudinal cross-sectional side view of the antifreeze faucet column front-end | tip part which shows the state ridge.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Outer cylinder of faucet column 11 Cap handle 12 Handle shaft 13 Screw 14 Handle receiver 15 Piston rod insertion hole 15a of handle shaft Piston rod vertical movement space of insertion hole 16 Handle shaft holder 17a Spiral skew guide groove hole 17b Spiral Oblique guide slot 18 Spacer 2 Support cylinder 2A Upper joint body of support cylinder 2B Lower joint body of support cylinder 2C Steel pipe connecting upper and lower joint bodies of support cylinder 21 Bushing 22 Drainage mechanism 22a Drainage mechanism upper end cap 22b Drainage of drainage mechanism Port 22c Ball check valve 22d of drainage mechanism Water flow path 22e to drainage mechanism Water flow path to drainage mechanism and gate water flow path to faucet water flow path 23 Parallel pin locking vertical groove 24 Pipe end core 25 Heat insulating material 26 Switching piston guide Frame 27 Guide frame for supporting lower end of switching piston 28 Lower end water supply port of support cylinder 29 Switching 3 Piston rod 3A Upper piston 3B Switching piston 3a Intake piston seal mechanism part 3b Switching piston guide frame upper end seal mechanism part 3c Drainage mechanism water passage opening / closing seal mechanism part 3d Water passage opening / closing seal mechanism to water supply path Part 3e Sealing mechanism part of gap between peripheral walls of switching piston lower end support guide frame 31 Parallel pin 32 Intake piston 33 Rod connecting upper piston and switching piston 34 Switching piston lower end support guide frame pressure release hole 4 O ring valve

Claims (2)

A bushing is provided on the side and a drainage mechanism is provided on the lower side. The piston rod is fitted into the support cylinder with the lower end connected to the water supply pipe and accommodated in the outer cylinder. An air inflow passage is provided on the upper side of the piston rod. An intake piston that opens and closes, a seal mechanism part that opens and closes the water passage to the drainage mechanism on the lower side, and a switching piston that has a seal mechanism part that opens and closes the water passage to the water supply path below the piston rod, The structure is such that water supply is prevented by raising the piston rod so that the piston rod can be moved up and down by rotating the cap handle at the top of the outer cylinder, and when the sealing function of the seal mechanism is lowered, the switching piston Automatic water-stop antifreeze faucet column characterized in that the water pressure on the upper side decreases and the piston rod is pushed up by the water pressure on the lower side to automatically stop the water On side of the sealing mechanism for opening and closing the water passage to the drainage mechanism is provided in the lower portion of the piston rod, below the seal mechanism for closing sealing mechanism for sealing the upper end of the switching piston guide frame, a water passage to the water supply channel claims person in, provided with a sealing mechanism for sealing the gap between the guide frame of the peripheral wall which supports the switching piston bottom, characterized in that setting the pressure release hole communicating from the lower end to the switching piston in the drainage mechanism water passage Item 1. Automatic still water antifreeze faucet column