JPS594210Y2 - electric drain valve - Google Patents

Description

[Detailed description of the invention] This invention relates to a drain valve that uses the power of a motor.

In winter, in cold regions, household drain valves are usually operated manually.

Electromagnetic force is sometimes used for remote control, but in large buildings such as government offices, buildings, hospitals, and factories that use large amounts of water, the water supply pipes are also large, making electromagnetic force inadequate due to its small capacity.

Therefore, it is appropriate to use a motor to operate a large drain valve, but in the case of a drain valve that switches water flow, shutoff, and drainage in stages between the elevation and descent of the valve stem, a motor is used to move the valve stem up and down. If this is the case, it is necessary to energize the motor when water is flowing and when the water is still draining, and to stop the motor and stop the energization when water is flowing or water is being stopped, in order to save electricity.

In this case, in the case of a drain faucet whose valve stem is moved up and down by screw feeding with the drain faucet main body, if the water is shut off and the water inlet is closed, the water supply pressure is applied to the water shutoff backing, so the screw feeding is stopped. This may cause the water stop backing to become loose (incomplete water stop) at the water inlet blockage.

Therefore, this invention prevents this drawback by applying water supply pressure to the upper part of the valve stem when the water is stopped, thereby allowing the motor to function perfectly.

For the above purpose, an ice chamber is provided at the top of the valve stem in a drain valve where the water stop backing, which has a communication port between the water inlet and the water outlet on the valve stem, closes when the valve stem descends. A water hole is provided that penetrates the inside of the valve stem from the bottom of the valve stem, and the ice chamber also has a shallow water stop backing that is inscribed in it by reducing the diameter of the lower part of the valve stem. Water supply pressure is applied to the water-blocking backing in the water chamber, so that no rising pressure is applied to the water-blocking backing when the motor is stopped, thereby preventing the occurrence of screw feeding.

To describe the embodiment in detail, the stopper box 1 has a communication port 4 between a water inlet 2 and a water outlet 3, and a kneading member 5 is screwed into and erected in the upper opening.

A drain hole 6 is bored through the kneading joint 5 to the outside of the bottom surface thereof, and a valve shaft 7 is inserted through the center part so as to be able to rise and fall freely, and a bottomless inner stopper lid 9 is screwed into the upper outer circumferential wall 8. .

As shown in FIG. 3, the water chamber 10 is formed in the upper part of the kneading member 5 and the center of the inner stopper lid 9, and the kneading member 5 side has a step-like stepped portion.

The water hole 11 that communicates the water chamber 10 and the water outlet 3 is vertically connected to the valve shaft 7.
A hole is made in the kneading part 5 parallel to the kneading part 5.

A shallow water stopper backing 12 that can freely contact the inner circumferential wall of the upper part of the kneading unit 5 is fitted onto a backing stand 13 that is fitted onto the valve stem 7,
Split washers 14.14 are fitted onto the valve stem 7 on the top and bottom of the backing base 13, and the split washers 1 are fitted with ring backings 15.15.
4 and 14 are tightly attached to fix the shallow water stop backing 12 to the valve shaft 7.

A water hole 16 is bored in the valve stem 7 from the lower end to the axis of the valve stem 7,
The upper end of the water hole 16 opens into a water hole 16' formed laterally in the valve shaft 7 directly above the upper split washer 14.

When the valve stem 7 is lowered, the ice chamber 10 is divided into upper and lower halves by the shallow water stop backing 12 as shown in FIG. 3, but when the valve stem 7 is raised as shown in FIG. communicated together.

The valve stem 7 has a slightly thinner diameter at the lower end and is fitted with a water-stop backing 17.
The waterproof backing 17 is fixed by fitting the clasp 18 and screwing it together.

A water hole 19 is bored in the catch 18.

The valve stem 7 directly above the water-stop backing 17 has a slightly thicker diameter and has a stepped portion 20, and the valve stem 7 above it has a stepped portion 20' formed on it by making the valve stem 7 just as thin. Thin valve stem 7
A drain backing 21 is loosely fitted to the valve stem 7 and a small gap 22 is formed between the valve stem 7 and the drain backing 21.

A shallow recess 23 is formed in the center of the lower part of the kneading member 5, and a water hole 11. The recess 23 and the gap 22 communicate with each other, and communicate with the water chamber 10 and the water outlet 3.

A spring 24 is interposed between the water stop backing 17 and the drainage backing 21.

The upper end of the valve shaft 7 is screwed and connected to the connecting cylinder 25 and fixed with a pin 26, and a rod 27 is connected to the upper end of the valve shaft 7.
Insert its lower end into the connecting tube 25 to form the inverted dome-shaped abutment plate 2.
8 and are screwed together and fixed to the abutment plate 28 with a pin 29, and the circumferential side of the abutment plate 28 is loosely inserted into the inner circumferential surface of the connecting cylinder 25, so that the valve shaft 7 and the rod 27 are in contact with each other. .

As shown in FIG. 1, the upper end of the lot 21 is covered with a crown plate 30, which is screwed together and secured with a pin 31.

The crown disc 30 is inserted into a hollow cylinder 32, springs 33 and 34 are interposed between the top and bottom of the crown disc 30, respectively, and a plug 35 is screwed into the lower end of the hollow cylinder 32 and fixed thereto.

A base with several male threads 36 is integrally provided in the upper part of the hollow cylinder 32, and a shaft 37 with vertical stripes on both sides is mounted on top of the base.
are also protruding from one piece.

The lower part of the threaded body 38, which has several female threads formed by male threads 36, is screwed and fixed to the upper end of the inner cylinder 39, which is screwed to the upper end of the inner stopper lid 9. .

Further, an outer cylinder 40 externally fitted onto the stopper box 1 with screws is also erected up to the lower part of the screw body 38, and is fitted and locked to an upper cylinder 41 which is also externally fitted onto the screw body 3B with screws.

A motor 42 is connected to the upper cylinder 41 , and a shaft 37 with both sides cut is fitted into the lower part of a connecting body 44 that is integrated with the motor shaft 43 of the motor 42 , thereby transferring the rotational force of the motor shaft 43 . is transmitted to the shaft 37 via the connecting body 44, and the shaft 37 can rotate freely according to the rotating direction of the motor 420, and can also freely slide up and down in the connecting body 44 by the male screw 36 and female screw. I am careful about levers.

With the structure described above, when the motor 42 is started with water stopped while water is flowing as shown in FIG. The male screw 36 integrated with the rotor 27 rotates and descends, and the valve stem 7 is pushed down so that the water stop backing 17 at the lower end closes the communication port 4.

At this time, the drain backing 21, which is loosely fitted onto the valve stem 7 and supported by the spring 24, is replaced by the water stop backing 1.
7 closes the communication port 4, the tapered upper step 20' of the valve stem 7 pushes down after a short delay to open the drain hole 6, resulting in the water stop state shown in FIG. The water in the riser pipe (not shown) on the side of the water outlet 3 flows backward, and the water in the lower part of the water chamber 10 is also discharged into the forest from the drainage hole 6 and is kept from freezing.

At the same time, the water supply on the water inlet 2 side enters the upper part of the water chamber 10 through the water hole 19 of the stopper plate 18, applies water supply pressure to the shallow water stop backing 12, pushes down the valve stem 7, and sets the water stop backing 17 to a stop where there is no intermediate shallow water. Keep in water state.

At this time, the limit switch 45 of the motor 42 is activated to stop the motor 42, and even if the motor 42 is stopped, the water stop state is maintained.

Next, when the motor 42 is rotated in the opposite direction, the shaft 37 and the male thread 36 are rotated in the opposite direction and raised upward against the water supply pressure in the water chamber 10, and the valve shaft 7 is also raised. The water stop backing 17 is opened.

At this time, the drain backing 21 is pushed up by the spring 24 and the water supply pressure to close the drain hole 6 a little earlier, so that intermediate shallow water does not occur.

When the valve stem 1 is pulled up to a predetermined height, the limit switch 45 is activated and the motor 42 is stopped.
Water is flowing as shown in the figure.

Until then, the water in the upper part of the water chamber 10 is pushed out from the water hole 16' to the water hole 16, the shallow water stop backing 12 communicates the upper and lower parts of the water chamber 10, and then the upper and lower water chambers 10 are pushed out from the water hole 16'.
Since the water hole 19 communicates with the water hole 19, and the water hole 11 communicates with the gap 22, the water flow state is maintained even if the motor 42 stops.

In the above, the springs 33 and 34 function to absorb errors in assembly dimensions and compensate for differences in elevation from the beginning due to wear of the backing, especially the water-stop backing 17.

Particularly important in this invention is the operation when the motor is stopped and the water is stopped as shown in Figure 3, which is stated in the purpose of the invention in the header of this invention.

In this case, since the water supply pressure is applied to the water stop backing 17 having a large diameter in proportion to its area, the valve stem 7 receives a rising force when the water is stopped, thereby causing the lot 27 to be tightened by the screw 36. Rotate the motor to idle and loosen the blockage of the communication port 4 of the water stop backing 17.
By applying water supply pressure to the shallow water stop backing 12, the increased pressure applied to the valve stem 7 is eliminated.

As described above, in this electric drain valve, the shallow water stop backing 12 fixed to the valve shaft 7 is connected to the water chamber 10 provided at the upper part of the valve shaft 7 and communicating with the water inlet and water outlet sides. By making the water supply communicate or not communicate between the upper and lower parts of the shallow water stop backing 12 due to the difference in the inner diameter of the water chamber 10 when sliding up and down, when the water is stopped, the water supply pressure is pushed down onto the shallow water stop backing 12. When water is supplied, pressure is applied to push up and push down the same backing as above, and this solves the conventional problem when operating the drain plug in a large diameter water supply pipe using a motor, namely ,
This has the effect of solving the problem that when the motor stops when the water is stopped, the water supply pressure causes the motor to idle, resulting in an incomplete water stop and water passing.

[Brief explanation of drawings]

Figure 1 is a longitudinal cross-sectional view of the electric drain valve of this invention when the water is turned off.
Figure 2 is a vertical cross-sectional view of the same as above when water is flowing, Figure 3 is an enlarged vertical cross-sectional view of the lower faucet in Figure 1 of the above when water is stopped, and Figure 4 is an enlarged longitudinal cross-sectional view of the same as above when water is flowing. be. In the figure, 1 is a stopper box, 2 is a water inlet, 3 is a water outlet, 4 is a communication port, 5 is a kneading hole, 6 is a drainage hole, 7 is a valve shaft 8 is a peripheral wall, 9 is an inner stopper lid, 10 is an ice chamber, 11 is a water hole, 12 is a shallow water stop backing, 13 is a backing stand, 14 is a split washer, 15 is a ring backing, 16 is a water hole, 17 is a water stop backing, 1
8 is a stopper, 19 is a water hole, 20 is a step, 21 is a drainage backing, 22 is a gap, 23 is a recess, 24 is a spring,
25 is a connecting cylinder, 26 is a pin, 27 is a rod, 28 is an abutment plate, 29 is a pin, 30 is a crown plate, 31 is a pin, 32 is a hollow cylinder, 33 is a spring, 34 is a spring, 35 is a plug, 36 is a 37 is a shaft, 38 is a threaded rod, 39 is an inner cylinder, 40 is an outer cylinder, 41 is an upper cylinder, 42 is a motor, 43 is a motor shaft, 44 is a connecting body, and 45 is a limit switch.

Claims (1)

[Scope of utility model registration request] A drainage hole 6 that communicates with the outside from the bottom and a water hole 11 that communicates with the top surface are bored in the kneading part 5 on the stopper box 1 provided with the communication port 4, and a valve shaft 7 is inserted in the center part so as to be able to rise and fall. A water chamber 10 is formed between the inner stopper lid 9 and the kneader 5, and a shallow water stopper backing 12 is fixed to the valve stem 7 within the water chamber 10, and water is supplied from the lower tip of the valve stem 7. A water hole 16 communicating with the upper part of the chamber 10 is bored, and a water stop backing 17 for opening and closing the communication port 4 and a drainage backing 21 for opening and closing the drain hole 6 on the bottom of the kneading machine are attached to the valve shaft 7 between the bottom of the kneading machine 5 and the communication port 4. This electric drain valve is equipped with a shaft and connects a coaxial lifting motor 42 to the valve shaft 7.