JPS5812243Y2 - Residual water removal device in pressure reducing valve - Google Patents

Description

[Detailed explanation of the invention] This invention connects a water stop valve and a water supply pipe equipped with a drain valve to a pressure water supply source such as a water pipe, and connects the tip of the water supply pipe to a hot water supply boiler. In the connected piping, etc., a drain valve that drains water by forcibly opening a check valve in the pressure reducing valve interposed in the water supply pipe and causing the inside of the valve body to communicate with the atmosphere. The main idea is to have a structure suitable for use in cold regions, and since it is difficult to completely remove residual water, it may freeze inside and delay the resumption of water supply or freeze. The purpose of this is to improve conventional pressure reducing valves, which tend to cause accidents such as breakage when placed horizontally.

As shown in FIG. 1, a conventional pressure reducing valve has a cylindrical shape and an opening 45 on the primary pressure side in a pipe line between an inlet pipe 42 on the primary pressure side of a valve body 41 and an outlet pipe 430 on the secondary pressure side. A chatki valve device wall 44, a valve port 47, and a cylindrical slider fitting port 4
8 is connected to the pressure regulating valve device wall 46 provided on the same axis, and is provided in the form of a partition. The spring 49 and the Chatsuki valve body 50 are sequentially inserted, and the valve seat ring 51 on which the valve body 50 is seated from the secondary pressure side is fitted and locked in the opening 45, and the valve seat ring 51 engaged with the opening 45 is After applying the cylindrical strainer 52, the screw cap 54 equipped with the vacuum break valve 55 is fitted watertightly to the above-mentioned sign plate 53 to hold the strainer 52 in place. The slider 58 fixed to the valve rod 57 is passed through the valve rod 51 at the center of the pressure regulating valve body 56, which can be seated from the next pressure side, to freely slide into contact with the slider fitting opening 48, and the fitting is performed. The upper end of the valve rod 57 protruding from the mouth is fixed to a flexible partition 59 fixed to the valve body 41, and a pressure adjustment spring 60 is provided on the outer surface of the partition 59, and a spring pressure adjustment screw 61 is provided at the upper end of the spring 60. A drain plug 6 is attached to a screw cap 64 attached to a label 63 provided on the primary side outer bulkhead of the valve body 41 for inserting the pressure regulating valve body 56.
5 is screwed on, and a spring 66 is hung between the inner surface of the screw cap 64 and the pressure regulating valve body 56, or the spring 66 is placed in place without bending.

As shown in FIG. 2, the pressure reducing valve a is installed, for example, in a water supply pipe C that branches from a water pipe and connects its tip to a hot water supply boiler f. Normally, C is provided with a water stop valve d and a water drain valve e upstream of the pressure reducing valve, and the make-up pressure water is supplied by the pressure reducing valve a, for example, to 0.
, the pressure is reduced to 5Ky/cJ and automatically supplied to boiler f.

In this piping, the inlet pipe 42 of the valve body 41 of the pressure reducing valve a
When the water stop valve d is closed and the water supply is interrupted when the water stop valve d and the outlet pipe 43 are installed horizontally as shown in FIG. The valve is closed and the pressure regulating valve 56 is opened to its maximum value.

When the drain valve e is opened in the above condition and the drain plug 65 of the valve body 41 is also pulled, the water in the water supply pipe C and the valve body 41 is almost completely drained. Residual water T1 is generated on the screw cap 54 as shown by the chain line, and this residual water soaks the check valve body 50.

Therefore, when the remaining water freezes, the Chatsuki valve body 50
is trapped in the ice, so open the water stop valve d and drain the water valve e.
Even if the water supply pipe cK is closed and the water supply is restarted, the valve remains closed until most of the frozen water 71 melts due to the temperature of the pressure water entering from the artificial pipe 2, and the water supply pipe cK is restarted. significantly delayed.

Further, the freezing of the remaining water 71 may cause damage to the valve body 41 and other equipment.

In order to prevent the above-mentioned freezing accident of conventional pressure reducing valves, the present invention is designed to completely remove residual water that would otherwise remain soaked in the Chatsuki valve body.

An embodiment of the present invention will be described below. The valve body 1 of the pressure reducing valve has a first valve port 4 in the pipeline between the inlet pipe 2 on the primary pressure side and the outlet pipe 3 on the secondary pressure side, which is perpendicular to the axes of the inlet pipe 2 and the outlet pipe 3. A conduit closing wall 5 in which a conduit closing wall 5 and a second valve port 6 are opened and a conduit closing wall 7 having a horizontal U-shaped protrusion are communicated internally, and the first valve port 4 and its valve port are provided. The bottom of the wall 5 is set to be slightly higher than the second valve port 6, and a large diameter screw hole 8 is provided in the outer wall on the inlet pipe 2 side in alignment with the axis of the first valve port 4. A sliding hole 10 is formed in the conduit closing wall γ along the axis of 6, a large diameter screw hole 9 is provided on the secondary pressure side in the outer wall, and a screw hole 9 is provided in the outer wall above the sliding hole 10. A through hole is formed in which a flexible diaphragm 11 is stretched.

The outer circumference of the upper end of a cylindrical valve support frame 12 with a water-permeable portion formed through the curved surface is press-fitted from the screw hole 8 of the valve body 1 to fit the inner diameter of the first valve port 4, and the collar 13 is tightly attached from the lower surface. The lower end of the valve support frame 12 is joined to and supported by the inner surface of a screw cap 23 screwed into the screw hole 8.

A cylindrical strainer is fitted into the valve support frame 12, a perforated partition wall 14 is formed on the upper side that projects toward the center, and a valve rod insertion hole is provided at the center of the partition wall 14. A valve rod 16 provided on the lower center surface of the one-chat lock valve body 15, which is seated from the secondary pressure side, is passed through the valve rod insertion hole and protrudes toward the primary pressure side, and the retaining ring 1T at the lower end and the perforated partition wall 14 are connected to each other. A coil spring 18 is hung between the lower surfaces to force the seating.

The valve support frame 12 and the valve body 15 are assembled in advance.
It is assembled.

For the second valve port 6, the pressure regulating valve body 1 is inserted through the screw hole 9.
A coil spring 22 supported on the inner surface of a spring bearing cap 24 which is in contact with 9 from the secondary pressure side and is screwed into the screw hole 9 is mounted on the valve rod 20 of the pressure regulating valve body 19 by extending it over the lower surface of the valve body. The slider 21 is slidably and tightly fitted into the sliding hole 10 and the upper end of the slider 21 is fixed at the center of the lower surface of the flexible diaphragm 11, and the upper end of the slider 21 is fixed at the center of the upper surface of the flexible diaphragm 11 and the inner surface of the cover 25. A pressure setting spring 26 is hung between them.

A drain plug 27 is provided at the center of the receiving cap 24, which communicates the inner space of the valve body 1 with the outside air by screwing inward.

The stepped portion 29 is tapered in the center of the screw plug 23 described above, and the inner part is an enlarged diameter hole 28a, and the outer part is a small diameter hole 28.
A head portion 31 and a small diameter hole are provided with a stepped hole 28 as indicated by b, and the portion that fits into the enlarged diameter hole 28a is made into a hexagonal shape or the like to create a water passage S between the circumferential surface and the inner surface of the enlarged diameter hole. A drain plug 30 consisting of a leg piece 32 that fits tightly into the step hole 28 is inserted into the step hole 28, an O-ring 33 fitted to the drain plug 30 is brought into contact with the step 29, and an O-ring The ring 34 is brought into contact with the outer periphery to obtain watertightness, and furthermore, a center hole 35 is formed in the center of the drain plug 30 and the diameter increases upward, and a diametrical drain hole 36 is provided at the upper end of the leg 32. A ball valve 38 is connected to the center hole 35 at an enlarged diameter portion 3γ above the center hole 35, and a spring 4 contacts the ball valve elastically to a valve seat 39 which is a stepped portion of the center hole 35.
Attach 0.

Center hole 35 and ball valve 38 having the aforementioned valve seat 39
constitutes a vacuum breaker valve.

(Fig. 3.4) The pressure reducing valve a shown in the above embodiment is inserted into the water supply pipe C with the inlet pipe 2 and the outlet pipe 3 horizontal as shown in Fig. 2.

With this configuration, when the water stop valve d is closed and the drain valve e is opened, the pressure from the inlet pipe 2 disappears, and the Chatsuki valve body 15 is seated on the valve seat on the upper end surface of the valve support frame 12 by the elasticity of the coil spring 18. to prevent backflow from exit back 3.

In addition, the water drain valve 27 is opened (and the remaining water from the Chatsuki valve body 15 to the boiler f is drained, and the screw cap 23 is removed inside the valve body 1.
Residual water is generated on the upper surface of the valve rod 16, partially submerging the valve rod 16.

Therefore, when the drain valve 30 is pushed in and the valve rod 16 is pushed up, the once closed Chatsuki valve body 15 opens, and at the same time, the drain hole 36 and the center hole 35 are opened from the water passage S on the outer periphery of the head 31 of the drain valve 30. Completely remove remaining water by draining water through the lower part of the tank.

The reason why the Chatsuki valve body 15 is opened by pushing up the water drain plug 30 is to completely drain the remaining water from the recessed portion even when the valve seat is seated in a slightly recessed position.

The forced opening of the Chatsuki valve body 15 quickly stops draining the remaining water on the secondary pressure side even when the operation of the drain valve 27 is delayed.

The above describes the case where the pressure reducing valve a is installed horizontally, but if it is installed vertically with the inlet pipe 2 at the bottom and the outlet pipe 3 at the top, it can also be forcibly opened by the drain plug 30 of the Chatsuki valve body 15. The valve does not cause residual water in the valve body 1,
At the same time, the speed of draining water by the drain valve e can be increased.

In addition, the water drain valve 30 is automatically returned to the position shown in FIG. 3 by the water pressure on the negative side when the water flow is resumed by opening the water stop valve d.

As clarified by the description of the embodiments described above, the present invention pushes the check valve body 15 of the pressure reducing valve a from the outside to force the valve to open, and at the same time, the pushing movement causes the first valve port 4 to open.
Drain plug 30 that drains residual water between the inlet pipe 2 and the inlet pipe 2 to the outside.
, it is possible to remove most of the remaining water in the water supply pipes connected to the valve body 1, the inlet pipe 2, and the outlet pipe 3, respectively, in preparation for freezing of the remaining water. This has the advantage that it can be adapted to pipes in cold regions where pipes 1 are arranged horizontally.

[Brief explanation of drawings]

FIG. 1 is a vertical side view of the center of a conventional pressure reducing valve, FIG. 2 is a side view of the piping, FIG. 3 is a side view of the center of the present invention, and FIG. 4 is an enlarged side view of the drain valve 30. 1 → valve body, 2 → inlet pipe, 3 → outlet pipe, 4 → first valve port,
6 → 2nd valve port, 15 → Chatsuki valve body, 16 → valve rod, 23
→Screw lid, 30→Drain plug.

Claims (1)

[Scope of utility model registration request] A pipe closing wall with a first valve port and a second valve port open is provided in the pipe between the inlet pipe and the outlet pipe of the valve body, and a chatty valve body is placed on the valve seat of the first valve port. For pressurized water, the valve seat of the second valve port is provided with a pressure regulating valve body which is in elastic contact from the secondary pressure side and can be seated from the secondary pressure side, with a pressure regulating spring acting on the valve rod through a flexible diaphragm. In the pressure reducing valve, the valve rod of the Chucky valve body is protruded toward the inlet pipe side, and a spring is wrapped around the valve rod to seat the Chucky valve body on the valve seat, and the valve rod of the Chucky valve body is moved inwardly. A residual water draining device for a pressure reducing valve, characterized in that a drain plug 30 is provided, which forcibly opens the valve body when it abuts against a rod, and communicates the inner space of the valve body with the atmosphere as the valve body moves.