JPS6367039B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an automatic pump device, and more particularly to an automatic pump device equipped with a diaphragm type air supply device.

[Conventional technology]

This type of automatic pump device uses the negative pressure generated on the suction side of the pump when the pump is started to reverse the diaphragm of the air supply device and draw outside air through the intake check valve. The air is supplied to the discharge side of the pump through a nozzle hole as small as 1 mm. Further, the discharge pipe of the pump is simply opened at the lower end into the pressure tank.

[Problem to be solved by the invention]

According to such conventional automatic pump devices, since the nozzle hole is always open when the diaphragm is reversed, the amount of outside air that flows in from the nozzle hole is less than half of the increased volume due to the reversal of the diaphragm. There was a problem that the air supply system was not used efficiently and the air supply system was not aspirated. In addition, because the nozzle hole is very small, it takes a long time to replenish the diaphragm when it is restored, and when there is insufficient air in the pressure tank, the pump may start up again before the diaphragm has fully recovered, making it impossible to resolve the air shortage. At the same time, when the diaphragm is reversed, a throttling effect occurs in the nozzle hole, resulting in a negative pressure inside, which causes the problem that outside air is sucked in, and when there is excess air in the pressure tank, more air is replenished. Furthermore, there was a problem that the nozzle holes were easily clogged with dust, sand, etc., resulting in low reliability. Moreover, since the lower end of the discharge pipe is simply opened into the pressure tank, if the water level in the pressure tank drops below the lower end of the discharge pipe due to water supply, the water discharged from the discharge pipe will cause the water surface to ripple. Since the air in the pressure tank is entrained in this water, there was a problem in that an intermittent mix of water and air (kushiyami water) was released from the faucet.

[Means to solve the problem]

The present invention was made to solve this problem, and includes a pump 2, a suction pipe 14 connected to the inlet side of the pump 2, a discharge pipe 4 connected to the discharge side of the pump 2, A pressure tank 1 for storing water discharged from the discharge pipe 4, and an air replenishing device 20 having a diaphragm 27 on the discharge side of the pump 2 for replenishing air in accordance with starting and stopping of the pump 2. , the discharge pipe 4
A communication portion 24 such as a small hole or notch is formed in the discharge inner pipe 5 housed in the pressure tank 1 above its lower end opening, and the air replenishment nozzle hole 47 of the air replenishment device 20 is connected to the discharge inner pipe 5. opens into the tube 4,
It has notches 50 on the upper and lower surfaces that protrude into the flow path in the discharge pipe 4 and allow fluid to flow in,
Further, a nozzle case 45 having a protrusion 51 on the lower surface is attached to the discharge pipe 4 so as to surround the nozzle hole 47, and a nozzle case 45 having a diameter larger than the nozzle hole 47 and larger than the fluid to be handled is installed inside the nozzle case 45. A ball valve body 49 having a slightly small specific gravity is installed, and the ball valve body 49 can freely roll along the upper surface of the nozzle case 45 when the inside of the discharge pipe 4 is filled with fluid and the fluid is not flowing. and the discharge pipe 4
When there is no fluid inside the discharge pipe 4 and when the inside of the discharge pipe 4 is filled with fluid and the fluid is flowing, the ball valve body 49 moves to the protrusion 51 of the nozzle case 45.
The protrusion 51 is inserted into the notch 50 so as to come into contact with the notch 50.
The automatic pump device is characterized in that it is provided between the air supply nozzle hole 47 and the air supply nozzle hole 47.

[Effect]

In such an automatic pump device, the pressure tank 1
When the air in the pressure tank 1 is insufficient, the water in the pressure tank 1 is released, and when the water level drops, the pump 2 is activated.
During this time, the communication portion 24 of the discharge pipe 4 is submerged in water, and the inside of the discharge pipe 4 is filled with water. As a result, the ball valve body 49 floats up and is received by the upper surface groove 50-3 of the nozzle case 45. When the pump 2 starts, the pressure on the suction side of the pump 2 suddenly decreases, so the diaphragm 27 of the air supply device 20 suddenly reverses. Due to this reversal of the diaphragm 27, outside air is sucked through the intake check valve 29, and water in the nozzle case 45 is sucked through the nozzle hole 47 of the nozzle 46. At this time, ball valve body 4
9 is received in the upper surface groove 50-3 of the nozzle case 45, so it moves smoothly to the nozzle 46 side riding the water flow toward the nozzle hole 47, and the nozzle hole 47
closely adhere to. When the nozzle hole 47 is closed by the ball valve body 49, the inflow of water is blocked, so the intake check valve 29 is wide open, and the outside air is supplied to the air supply device 2.
Flows into 0.

This series of operations is performed instantaneously, and this state is maintained until the pump 2 stops. Next, when the water discharge from the pressure tank 1 is stopped, the water sent by the pump 2 is stored in the pressure tank 1,
The water level and pressure within the pressure tank 1 gradually rise. Then, when the pressure in the pressure tank 1 reaches a predetermined pressure, the pump 2 stops. By this,
The pressure on the suction side of the pump 2 increases, and the diaphragm 27 instantly returns to its original position. Therefore, the air inside the air supply device 20 passes through the nozzle hole 47 and is discharged into the discharge pipe 4. At this time, the water or air discharged from the nozzle hole 47 causes the ball valve body 49 to move away from the nozzle hole 47 and return to its original position. Discharge pipe 4
The air discharged inside is sent into the pressure tank 1 through the discharge pipe 4 when the pump 2 is next started. In this way, air replenishment is reliably performed only once when the pump 2 is started. In this manner, when the amount of air in the pressure tank 1 becomes insufficient, the air replenisher 20 operates reliably and air can be fed into the pressure tank 1.

On the other hand, when the air in the pressure tank 1 is surplus, when the water in the pressure tank 1 is released, the water level decreases and the communication portion 24 is exposed from the water surface. Through this communication portion 24, water in the discharge pipe 4 is replaced with air in the pressure tank 1, and the discharge pipe 4 is filled with air. In this case, most of the water is discharged into the pressure tank 1 from the lower end opening of the discharge pipe 4, so the water surface is not rippled, and therefore, the air in the pressure tank 1 is not dragged into this water. . The ball valve element 49 loses its buoyancy and due to its own weight, the lower groove 50- of the nozzle case 45
1, and the nozzle hole 47 becomes open. Furthermore, when the water level and pressure decrease, the pump 2 is activated. When the pump 2 starts, the diaphragm 27 instantly reverses, and the discharge pipe 4 and pressure tank 1
The air inside flows into the air supply device 20 from the nozzle hole 47. In this case, since the nozzle hole 47 can have a large opening area, the air supply device is instantly filled with air. Next, the water sent by the pump 2 flows down the discharge pipe 4 toward the pressure tank 1. The ball valve body 49 is made of a material whose specific gravity is slightly lower than that of water, but since the force pushing it down by the water flowing in the discharge pipe 4 is superior to the buoyancy of the ball valve body 49, the ball valve body 49 49 is maintained in that state. Furthermore, since the ball valve element 49 is prevented from moving toward the nozzle 46 by the protrusion 51, the ball valve element 49 is prevented from closing the nozzle hole 47. Therefore, even if water is sent from the pump 2 into the discharge pipe 4 before sufficient air flows into the air replenishing device 20 from the pressure tank 1 side when the diaphragm 27 is reversed, the water will flow through the nozzle hole 47 for air replenishment. Only a portion of the air flows into the device, and even if the diaphragm 27 performs a reverse operation in response to activation of the pump 2, no outside air is taken in.

〔Example〕

Hereinafter, one embodiment of the present invention will be described based on FIGS. 1 to 7. As shown in FIG. 1, a pump 2 is mounted and fixed on a pressure tank 1. A steam/water separation chamber 3 is disposed in communication with the upper discharge side of the pump 2. The steam/water separation chamber 3 and the pressure tank 1 are communicated via a discharge pipe 4. This discharge pipe 4 is composed of a steam/water separation indoor pipe 5a and a pressure tank inner pipe 5b. The steam/water separation chamber pipe 5a extends to the upper part of the steam/water separation chamber 3 and is open. The pressure tank inner pipe 5b extends to the lower part of the pressure tank 1 and is open. The connection between the air-water separation indoor pipe 5a and the pressure tank inner pipe 5b is achieved by using an O-ring 8 and packing 7 between the flange 6 provided at the lower end of the air-water separation indoor pipe 5a, the pressure tank inner pipe 5b, and the pressure tank 1. The flange 6 is pressed against the O-ring 8 and the packing 7 with bolts (not shown). Packing 9 is arranged between the steam/water separation chamber 3 and the steam/water separation chamber inner pipe 5a to maintain watertightness. A water pipe 10 is attached to the lower part of the pressure tank 1 via a packing 11 and a discharge flange 12. A check valve 13 is disposed in communication with the suction side of the pump 2. A suction pipe 14 is attached to the inlet side of the check valve 13 via a suction flange 15. A packing 16 is arranged between the suction side of the pump 2 and the check valve 13 to maintain watertightness. Steam/water separation room 3
A priming cap 17 is removably attached to the upper surface of the tank via a packing 18. An air replenishing device 20 is attached to an intermediate portion of the discharge pipe 4 with bolts 22. One side of the air supply device 20 is connected to the suction side of the pump 2 via a communication pipe 21, for example, the check valve 1.
It is connected to the 3rd part. A nozzle portion 23 is provided on the other side of the air supply device 20, and this nozzle portion 23 projects into the discharge pipe 4. Pressure tank inner pipe 5
A small hole 24 forming a communication path is bored in the lower side surface of the pressure tank 1 of b. The distance from the lower end of this small hole 24 is determined depending on the air replenishment performance.

Next, the detailed configuration of the air supply device 20 is shown in FIGS.
This will be explained based on FIG. A bowl-shaped diaphragm case 25 and a bowl-shaped diaphragm cover 26 are combined to have a space inside. The outer circumference of the diaphragm 27 is held between the case 25 and the cover 26, and the diaphragm 27 is held between the case 25 and the cover 26.
A chamber A is formed between the diaphragm 27 and the inner surface of the cover 26, and a chamber B is formed between the diaphragm 27 and the inner surface of the case 25. Intake hole 2 at the bottom end of the case 25
8 is formed to communicate with chamber B. An intake check valve 29 is provided at the lower end of the intake hole 28 . This intake check valve 29 includes a ball valve body 30,
It consists of a valve seat 31, a spring 32 that presses the ball valve body 30 against the valve seat 31, and a cap 33. Small holes 34 and 35 are bored in the cap 33 and the valve seat 31. A coiled spring 36 is arranged between the diaphragm 27 and the cover 26. One end of the spring 36 is housed in the recess 37 of the cover 26, and the other end is housed in the diaphragm 2.
It is fitted into a spring seat 38 attached to 7.
A communication hole 39 communicating with the chamber A is formed in the cover 26. The communication pipe 21 is connected via a nut 40 and packing 41 so as to communicate with the communication hole 39 .

A communication hole 42 communicating with the chamber B is formed in the case 25. The communication hole 42 of the case 25 has a large diameter end portion 42a formed therein. , an opening 44 is formed in a part of the side surface of the discharge pipe 4. This opening 4
A packing 43 is interposed between the periphery of the large diameter portion 42a of the communicating hole 42 and the periphery of the large diameter portion 42a of the communicating hole 42. A nozzle case 45 is disposed passing through this opening 44. A nozzle case 45 is located inside the large diameter portion 42a of the tip.
One end of the nozzle case 45 is located, and a packing 43 is in contact with the outer periphery of the nozzle case 45. A nozzle 46 is fitted into one side of the nozzle case 45. The nozzle 46 has a 3 to 5 mm eccentricity at the top.
A nozzle hole 47 is formed with a diameter of about 100 mm. A large-diameter tip portion 47 a is formed on one side of the nozzle hole 47 and faces the communication hole 42 . Nozzle hole 47
A cone-shaped valve seat portion 48 is formed on the other side. A ball valve body 49 is placed on the other side inside the nozzle case 45.
is held rotatably. This ball valve body 4
9 is set to have a specific gravity slightly smaller than that of the fluid passing through the discharge pipe 4. When the fluid is water, this specific gravity is set to 0.8 to 0.95. Nozzle case 4
A notch 50 is formed on the other side of 5. In this notch 50, a lower surface groove 50-1, a front end groove 50-2, and an upper surface groove 50-3 are continuously formed.
Length l ₁ of the upper surface groove 50-3 and length of the lower surface groove 50-1
The relationship with l ₂ is set as l ₁ > l ₂ . This l ₂ is set slightly larger than the diameter of the ball valve body 49. The front end groove 50-2 is used for die cutting when the nozzle case 45 is manufactured from synthetic resin. A second protrusion 51 is provided at the center bottom of the nozzle case 45.
As shown in FIG. 4, it is formed integrally with the nozzle case 45. The height of the protrusion 51 is set to be the same as the radius of the ball valve body 49 or slightly higher by δ, and the ball valve body 49 can move laterally between the upper end of the protrusion 51 and the lower surface of the ceiling of the nozzle case 45. They are spaced apart. In order to attach the nozzle case 45 and nozzle 46 to the case 25 at predetermined positions,
A flat part 52 is formed on one side of the nozzle case 45, and the case 25 and the nozzle 46 also have a flat part 5.
3, 54 are formed, and these flat parts 52, 53,
54 are combined so that they match.

In such an automatic pump device, the water pipe 10
When a faucet (not shown) provided at the tip of the pressure tank 1 is opened and the pressure water in the pressure tank 1 is discharged from the faucet to the outside, the pressure in the pressure tank 1 decreases. As a result, the pump 2 is activated. When the water faucet is closed while the pump 2 is in operation, the pressure in the pressure tank 1 increases and the pump 2 stops. This operation is repeated.

Therefore, when there is a shortage of air in the pressure tank 1, the water level in the pressure tank 1 is at B' in FIG.
In this state, when the faucet is opened, the water level gradually decreases from the water level B', and when the water level reaches the water level A', the pressure switch (not shown) is closed and the pump 2 is started. During this time, the small hole 24 of the discharge pipe 4 is submerged in water, so the inside of the discharge pipe 4 is filled with water.
As a result, the ball valve body 49 floats up and is received by the upper surface groove 50-3 of the nozzle case 45. When the pump 2 starts, the pressure on the suction side of the pump 2 suddenly decreases, so the pressure in the chamber A of the air supply device 20, which is communicated with the communication pipe 21, suddenly decreases, and the diaphragm 27 is moved by the spring 36. It suddenly reverses to the right against the elastic force. Due to this reversal of the diaphragm 27, the chamber B suddenly becomes larger and the pressure inside the chamber B decreases. As a result, outside air is sucked through the intake check valve 29 and the nozzle hole 4 of the nozzle 46
Water in the nozzle case 45 is sucked through the nozzle case 7 . At this time, since the ball valve body 49 is received in the upper surface groove 50-3 of the nozzle case 45, the nozzle hole 47
It moves smoothly toward the nozzle 46 on the water flow toward the nozzle hole 47, and comes into close contact with the conical valve seat 48 of the nozzle hole 47. In this case, the length l ₁ of the upper surface groove 50-3 formed in the nozzle case 45 is replaced by the length l ₂ of the lower surface groove 50-1.
Since it is larger than the pump 2, the discharge pipe 4
The discharged water flows smoothly into the nozzle case 45 from the upper surface groove 50-3, and the ball valve body 49 is inserted into the conical valve seat 48 of the nozzle hole 47.
can be firmly attached to the Nozzle hole 47
When the ball valve body 49 closes, the inflow of water is blocked, and the intake check valve 29 opens wide.
Outside air flows into room B. When the pressure inside chamber B reaches near atmospheric pressure and outside air flows in, the intake check valve 29 is closed by pressing the ball valve 30 against the valve seat 31 by the spring 32. This series of operations is performed instantaneously, and this state is maintained until the pump 2 stops. Next, when the faucet of the water pipe 10 is closed, the water sent by the pump 2 is stored in the pressure tank 1.
The water level and pressure within the pressure tank 1 gradually rise. When the pressure in the pressure tank 1 reaches a predetermined pressure, the pressure switch is turned off and the pump 2 is stopped. As a result, the pressure on the suction side of the pump 2 increases, and the negative pressure that was pulling the diaphragm 27 to the right is released, so that the diaphragm 27 is instantly moved to the position shown in FIG. 2 by the elasticity of the spring 36. to return to. Therefore, the air stored in the chamber B passes through the communication hole 42 and the nozzle 47, and passes through the discharge pipe 4.
discharged inside. At this time, the ball valve body 49 is moved leftward away from the conical valve seat 48 by the water or air discharged from the nozzle hole 47, and returns to its original position. The air discharged into the discharge pipe 4 rises within the discharge pipe 4, is stored in the air-water separation chamber 3, and is sent into the pressure tank 1 through the discharge pipe 4 when the pump 2 is next started. In this way, air replenishment is ensured only once each time the pump 2 is started. In this manner, when the amount of air in the pressure tank 1 becomes insufficient, the air replenishment amount 20 operates reliably, and air can be fed into the pressure tank 1.

On the other hand, when there is surplus air in the pressure tank 1, the water level in the pressure tank 1 is at B in FIG. At this water level B, the pressure switch is open and the pump 2 is stopped. When the faucet is opened, the water level B gradually decreases and the small hole 24 is exposed from the water surface. Through this small hole 24, the water in the discharge pipe 4 is replaced with the air in the pressure tank 1, and the discharge pipe 4 is filled with air. In this case, most of the water is discharged into the pressure tank 1 from the lower end opening of the discharge pipe 4, so the water surface is not rippled, and therefore, the air in the pressure tank 1 is not dragged into this water. . The ball valve body 49 loses its buoyancy and falls under its own weight into the lower groove 50-1 of the nozzle case 45 as shown in FIG. 6, and the nozzle hole 47 becomes open. Further, when the water level and pressure decrease and reach the water level A, the pressure switch is closed and the pump 2 is started. When the pump 2 starts, the diaphragm 27 instantly reverses and the discharge pipe 4
The air in the pressure tank 1 then flows into the chamber B through the nozzle hole 47. In this case, since the nozzle hole 47 has an opening area about 10 times that of the conventional one, the chamber B is instantly filled with air. Next, the water sent by the pump 2 flows down the discharge pipe 4 toward the pressure tank 1. The ball valve body 49 is made of a material whose specific gravity is slightly lower than that of water, but since the force pushing it down by the water flowing in the discharge pipe 4 is superior to the buoyancy of the ball valve body 49, the ball valve body 49 49 is held in the position shown in FIG.
Moreover, the ball valve body 49 has a projection 51 that connects the nozzle 46.
Since movement to the side is prevented, the ball valve body 4
At 9, the nozzle hole 47 is prevented from closing. Therefore, even if water is sent from the pump 2 into the discharge pipe 4 before sufficient air flows into the chamber B from the pressure tank 1 side when the diaphragm 27 is reversed, the water will flow from the nozzle hole 47 into the chamber B. However, the pressure in chamber B does not reach the level that opens the intake check valve 29. Therefore, even if the diaphragm 27 performs a reverse operation in response to activation of the pump 2, external air will not be taken in from the intake check valve 29.

Incidentally, instead of the small hole 24 of the discharge pipe 4, a cut groove reaching the lower end may be used, and it is sufficient if there is a communicating path above the lower end opening of the discharge pipe 4.

〔Effect of the invention〕

According to the present invention, it is possible to close the nozzle hole when the diaphragm is reversed, thereby improving the utilization efficiency of the air supply device, eliminating air shortage and excess air, and furthermore, preventing clogging of the nozzle hole, thereby increasing reliability. Therefore, it is possible to provide an automatic pump device that improves the performance and does not discharge comb water.

[Brief explanation of drawings]

Fig. 1 is a vertical cross-sectional view of the automatic pump device of the present invention, Fig. 2 is an enlarged cross-sectional view of the p section in Fig. 1, Fig. 3 is a - sectional view of Fig. 2, and Fig. 4 is a cross-sectional view of Fig. 2. −
FIG. 5 is a sectional view taken along the line taken from FIG. 2, and FIGS. 6 and 7 are explanatory views of the operation of the ball valve body of the air supply device in the automatic pump device. 1... Pressure tank, 2... Pump, 4... Discharge pipe, 14... Suction pipe, 20... Air supply device,
27...Diaphragm, 45...Nozzle case,
47... Nozzle hole, 49... Ball valve body, 50...
...Notch, 50-1... Bottom notch, 50-3...
...Top surface notch, 51...projection.

Claims (1)

[Claims] 1. A pump 2, a suction pipe 14 connected to the inlet side of the pump 2, a discharge pipe 4 connected to the discharge side of the pump 2, and a pressure tank 1 that stores water discharged from the discharge pipe 4. , which is equipped with an air replenishing device 20 having a diaphragm 27 on the discharge side of the pump 2 that replenishes air in response to starting and stopping of the pump 2, which is housed in the pressure tank 1 of the discharge pipe 4. A communication portion 24 such as a small hole or a cut groove is formed above the lower end opening of the inner discharge pipe 5, and the air supply nozzle hole 47 of the air supply device 20 is opened in the discharge pipe 4. A nozzle case 45 having a notch 50 on the upper and lower surfaces that protrudes into the flow path in the pipe 4 and allows fluid to flow in, and further has a protrusion 51 on the lower surface, is attached to the nozzle case 45 so as to surround the nozzle hole 47. The nozzle hole 47 is attached to the pipe 4 and the nozzle hole 47 is installed in the nozzle case 45.
A ball valve body 49 having a larger diameter and a specific gravity slightly smaller than the fluid to be handled is installed, and when the inside of the discharge pipe 4 is filled with fluid and the fluid is not flowing, the ball valve body 49 is nozzle case 45
The ball valve body 49 is movable along the upper surface of the nozzle case when there is no fluid in the discharge pipe 4 and when the discharge pipe 4 is filled with fluid and the fluid is flowing. 45. An automatic pump device characterized in that the protrusion 51 is provided between the notch 50 and the air supply nozzle hole 47 so as to come into contact with the protrusion 51 of 45.