JPS6233435B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates primarily to a reciprocating pump for an atomizer for electrically or manually dispensing operations.

Conventionally, this type of reciprocating pump discharged liquid when pushing down the operating shaft, etc., and sucked up liquid when pulling it up, so when operated continuously, there were problems such as intermittent discharge and pulsation. It was hot.

This invention was made in view of the above circumstances,
The purpose of this is to make the amount of liquid discharged approximately the same by moving the operating pipe forward and backward, thereby reducing pulsation and performing the spraying operation smoothly.

Hereinafter, embodiments of the present invention will be described in detail based on the drawings.

Reference numeral 1 in the figure denotes a container body, and a suitable cap 2 is screwed onto the mouth portion 1a of the container body 1. A through hole 2a is bored in the center of the cap 2, and the upper housing 3 is connected to the through hole 2a and the opening 1a.
A cylindrical body 5 consisting of a lower housing 4 is inserted therein, and each flange portion 3a, 4a is attached to the mouth portion through a gasket 6 in a liquid-tight manner. That is, as shown in FIG. 1, the cylindrical body 5 is attached to the mouth part 1a of the container body 1, and has a shape in which the upper housing 3 passes through the top plate part of the cap 2, and the lower housing 4 extends through the top plate part of the cap 2. It is disposed in a liquid-tight manner so as to enter into the mouth portion 1a.

The upper housing 3 has an upper cylinder 7 formed on its inner wall surface, an opening 3b formed in the center of the upper part, and air that communicates between the upper cylinder 7 and the outside air at the upper part near the flange part 3a formed at the lower part. Hole 3
c is drilled.

On the other hand, the lower housing 4 has a lower cylinder 8 formed on its inner wall surface, and the lower housing 4 is located at an appropriate position.
An air hole 4b communicating between the inner and outer walls of the inner and outer walls is formed, and a lower check valve, which will be described later, is provided at the lower end 4c.

These upper housing 3 and lower housing 4 form a cylindrical body 5 as shown in FIG. 1, and form the exterior body of the pump of the present invention. An upper piston 9 and a lower piston 10, which are reciprocally movable, are inserted into the upper housing 3 and the lower housing 4 in correspondence with the respective cylinders 7 and 8, respectively.

These upper piston 9 and lower piston 10 are
The upper piston 9 is configured to close the air hole 3c of the upper housing 3 in its lowered position, and the lower piston 10 is configured to close the air hole 3c of the upper housing 3 in its lowered position. It is configured to close the air hole portion 4b of the lower housing 4. Moreover, the air hole portion 3
c and 4b are configured to communicate with each other at an intermediate position of the operation pipe 11, and are configured to suck in outside air.

A base end 11a of a bottomed operation pipe 11 is fixed above the upper piston 9, and a distal end 11a thereof is fixed.
A discharge port 12 is formed in b, a passage 13 is formed in the operation pipe 11, and a partition plate 14 for closing the passage 13 is provided near the base end 11a, and the passage 13 in the vicinity and the upper cylinder are A through hole 15 communicating with 7 is bored.

Further, in order to maintain liquid tightness between the opening 3b of the upper housing 3 and the outer circumferential surface 11c of the operating pipe 11, an O-ring 16 is fitted onto the outer circumferential surface 11c of the operating pipe 11 and is held by a presser member 17. It is attached to the upper housing 3.

Lower piston 1 provided in the lower housing 4
0, an intermediate pipe 18 is integrally attached to the upper piston 9, a passage 19 is formed in this intermediate pipe, and a through hole 20 communicating with the cylinder 7 is provided in the upper part of this passage 19, and The lower part is connected to the outlet side of the upper check valve 21 in communication. The upper check valve 21 is disposed at the lower part of the passage 19 of the intermediate pipe 18 to open and close this passage 19, and the upper valve hole 22 communicating with the lower cylinder 8 is integrated with the lower piston 10. Upper valve member 2
3, the upper end of the opening of the upper valve hole 22 is processed into an inclined surface, and the upper ball 24 is placed closely thereon.

And the above-mentioned operation pipe 11, partition plate 14,
Upper piston 9, intermediate pipe 18, upper valve member 23,
In the embodiment shown in FIG. 1, the lower pistons 10 are coaxially arranged and integrated so that they can be operated simultaneously.

Furthermore, the lower housing 4 is provided with the lower cylinder 8.
A lower check valve 25 is provided that communicates the outlet side with the lower check valve 25 . That is, the lower valve member 26 of the lower check valve 25 is integrally attached to the lower end 4c of the lower housing 4 (i.e., the flange portion 4a) so as to close the lower end 4c, and the outlet side of the lower check valve 25 is It communicates with the lower cylinder 8 and has an opening 2 on the inlet side.
6a is formed to face the inside of the container body 1, and a lattice-shaped inclined surface portion 26b is formed which opens upward with respect to the center axis of the lower valve member 26, and the lower ball 27 is placed closely thereon. ing. and,
A tube 28 for sucking up the liquid content (not shown) in the container body 1 is connected to the opening 26a of the lower valve member 26.

Here, the pressure receiving area of the lower cylinder 8 is designed to be at least twice as large as the pressure receiving area of the upper cylinder 7, and with this consideration, the liquid inside the container body 1 can be smoothly drained. (The reason for this will be explained later).

Hereinafter, the operation of the reciprocating pump according to the present invention configured as described above will be explained.

FIG. 1 shows the state in which the operating pipe 11 is pushed down. When the operating pipe 11 is pulled up, the upper piston 9 and the lower piston 10 fixed thereto move upward at the same time, and the upper cylinder The inside of the cylinder 7 is pressurized, and the inside of the lower cylinder 8 is depressurized. When the inside of the upper cylinder 7 is pressurized, the liquid inside (air since the liquid has not risen at the beginning of the operation, the same applies hereafter) passes through the through hole 15 and the passage 13 of the operation pipe 11 to the discharge port. 12 and released to the outside. Also, a part of the liquid inside the upper cylinder 7 is transferred through the through hole 20 to the passage 1 of the intermediate pipe 18.
9 and toward the upper check valve 21, the upper check valve 21 is closed by this pressure and the weight of the upper ball 24, and no backflow occurs. Therefore, when the operating pipe 11 is pulled upward, a discharge amount corresponding to a decrease in the volume of the upper cylinder 7 (in the embodiment shown in FIG. 1, the value obtained by multiplying the pressure receiving area of the upper cylinder 7 by the moving distance) can be obtained. It will be done. Figure 2 shows the state in which the operating pipe 11 is at its highest point (reaching top dead center) (however, the through hole 1 on the right side in Figure 1)
5 has been moved to the left). Further, the content liquid tries to flow into the lower cylinder 8, which is depressurized by the upward movement of the lower piston 10, from both the upper check valve 21 and the lower check valve 25, but the upper check valve 21 is Since the lower ball 27 of the lower check valve 25 is closed as shown in FIG.

Next, when the operation pipe 11 is pushed down from the state shown in FIG. 2, the upper piston 9 fixed to this
The lower piston 10 moves simultaneously, and the pressure inside the upper cylinder 7 is reduced and the pressure inside the lower cylinder 8 is increased. When the pressure inside the upper cylinder 7 is reduced, the through hole 1
5, the liquid inside the passage 13 of the operating pipe 11 tends to flow backwards, and the liquid tends to flow from the passage 19 of the intermediate pipe 18 rather than through the through hole 20. Also,
When the lower cylinder 8 is pressurized, the lower check valve 25 is closed by this pressure and the weight of the lower ball 27, so the liquid inside the lower cylinder 8 flows toward the upper check valve 21. The liquid flows out, pushes up the upper ball 27, and the liquid content flows from the passage 19 of the intermediate pipe 18 into the upper cylinder 7 via the through hole 20. This inflow amount is a value obtained by multiplying the pressure receiving area of the lower cylinder 8 by the moving distance of the lower piston 10, and this value is calculated by the above-mentioned upper piston 9 and upper cylinder 7.
approximately twice the change value due to be. Therefore, when the operation pipe 11 moves downward, the liquid content approximately twice as much as the volume change of the upper cylinder 7 flows into the upper cylinder 7, and the remaining amount (i.e., the volume change of the upper and lower cylinders 7, 8) The difference in volume can be made approximately equal to the amount of change in volume of the upper cylinder 7).The content liquid of the upper cylinder 7 passes through the passage 13 of the operation pipe 11 from the through hole 15, and is discharged from the discharge port 12 to the outside air. In this way, approximately the same amount of discharge is obtained by vertical movement (reciprocating movement) of the operating pipe 11.

When the operating pipe 11 is at its lowest position (reaching the bottom dead center), the upward movement of the operating pipe 11 starts again in the state shown in FIG. 1 and is repeated.

As described above, by continuously moving the operating pipe 11 up and down, the liquid inside the container body 1 is discharged one after another without any interruption. Since the internal pressure decreases and becomes a negative pressure, it is necessary to replenish air as appropriate in order to continue discharging the content liquid. For this purpose, the air holes 3c and 4b and the air chamber 29 are provided, and as shown in FIGS. At least one of the upper piston 9 and the lower piston 10 is closed at the position, and the air hole 3 is closed at the intermediate position of the operation pipe 11.
c and 4b are communicated with each other so that outside air can be taken in. By employing such a configuration, the liquid inside the container body 1 communicates with the outside air only when the container is in operation, and the contents are completely disconnected from the outside air when the container is not in operation. Therefore, air can be easily replenished into the container main body 1, and the sealing performance of the container can be improved.

FIG. 3 shows an embodiment in which the reciprocating pump shown in FIGS. 1 and 2 according to the present invention is electrically operated. A motor 43 having a speed reduction device is rotated by a cam 44, and this rotation is transmitted to an L-shaped lever 46 rotatably supported on a fulcrum pin 45 by a cam 44 to convert it into reciprocating motion, which is operated by a connecting pin 47. The member 48 is moved up and down, and the operation pipe 11 integrally attached thereto is moved to suck up the spray liquid 49 in the container body 1 and spray it through the spray hole member 50. Coupled with the use of such a device, it is possible to efficiently perform continuous and smooth spraying with little pulsation. In place of the electric system shown in FIG. 3, a manual operation system may be used. In this case, a spring (not shown) is provided at an appropriate position inside the cylindrical body 5 or near the cap 2 so that the operation pipe is always connected upward. 11 is conveniently configured to be energized.

As detailed above, the reciprocating pump according to the present invention is provided with an upper and lower cylinder and an upper and lower piston, an upper check valve is provided between the upper cylinder and the lower cylinder, and a lower check valve is provided between the lower cylinder and the container body. In addition, the pressure receiving area of the lower cylinder is configured to be larger than the pressure receiving area of the upper cylinder, and the air hole for intake of outside air can be opened and closed as appropriate by the upper and lower pistons. It can produce excellent effects such as:

The content liquid in the container body can be discharged each time the upper and lower pistons reciprocate, and air can be smoothly introduced into the container body, and the discharge amount can be easily made to be approximately equal. The content liquid can be discharged without interruption and with little pulsation, making it possible to perform a spraying operation smoothly, and by integrally electrically operating the upper and lower pistons, it is possible to spray efficiently.

The liquid inside the container body communicates with the outside air only when it is in operation, and is completely cut off from the outside air when it is not in operation. This allows for smooth introduction of air into the container body and prevents deterioration of the liquid content. Evaporation can be prevented.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal sectional view showing an embodiment of the present invention;
FIG. 2 is a partial sectional view showing the operation, and FIG. 3 is a cutaway side view showing an example of electric operation. DESCRIPTION OF SYMBOLS 1... Container body, 3... Upper housing, 4... Lower housing, 5... Cylindrical body, 7... Upper cylinder, 8... Lower cylinder, 9... Upper piston, 10... Lower piston, 1
DESCRIPTION OF SYMBOLS 1... Operation pipe, 11a... Base end part, 11b... Tip part, 12... Discharge port, 15... Through hole, 21... Upper check valve, 25... Lower check valve, 18... Intermediate pipe, 19...
Passage, 20...through hole, 3c, 4b...air hole portion.

Claims (1)

[Claims] 1 Consists of an upper housing 3 and a lower housing 4, and an upper cylinder 7 is disposed within the upper housing 3.
A cylindrical body 5 having a lower cylinder 8 formed in the lower housing 4, an upper piston 9 inserted reciprocably into the upper cylinder 7, and a base end 11a fixed to the upper piston 9. A bottomed operating pipe 11 having a discharge port 12 at its tip 11b and a through hole 15 communicating between the upper cylinder 7 and the internal passage 13 is inserted into the lower cylinder 8 so as to be able to reciprocate. The lower piston 10 and the upper piston 9
and the lower piston 10 are integrally connected, and a passage 1 is formed inside.
9 is formed and a through hole 20 communicating with the upper cylinder 7 is provided at the upper part of the passage 19, and a passage 1 of the intermediate pipe 18.
9, the upper check valve 21 has an inlet side communicating with the lower cylinder 8 and an outlet side communicating with the passage 19.
and a lower check valve 25 disposed in the lower housing 4 and communicating the outlet side with the lower cylinder 8, and the pressure receiving area of the lower cylinder 8 is larger than the pressure receiving area of the upper cylinder 7. Moreover, the cylindrical body 5 has a configuration in which the upper housing 3 passes through the top plate of the cap 2 which is placed over the opening 1a of the container body 1, and the lower housing 4 passes through the opening. The cylindrical body 5 is disposed liquid-tightly in the container body 1 so as to enter into the interior of the container body 1a.
The upper housing 3 forming the upper housing 3 is provided with an air hole 3c that communicates the upper cylinder 7 with the outside air, and the lower housing 4 is provided with an air hole 4b that communicates between the inner and outer walls of the lower housing 4. , and the air hole portion 3c is set to be closed by the upper piston 9 when the upper piston 9 is in the lowered position, and the air hole portion 4b is set to be closed by the lower piston 10 when the lower piston 10 is in the raised position, and A reciprocating pump characterized in that the air holes 3c and 4b are communicated with each other at an intermediate position of the operation pipe to suck outside air.