JPH064923Y2 - Atomizer pump - Google Patents

Description

[Detailed description of the device] [Industrial applications]

 The present invention relates to a manual chemical liquid pressure pump for a sprayer.

[Prior art]

This type of chemical liquid pressure pump uses an alloy such as brass or stainless steel that is not corroded by the chemical liquid. As shown in FIG. 5, an outer cylinder 52 is arranged outside the cylinder 51 coaxially with the cylinder 51. On the upper part of the cylinder, a closing member in the shape of a bowl which is pressed down by press molding is soldered and integrated, and on the lower part of the outer cylinder, a plate-like closing member 55 having an opening through which the cylinder is inserted is soldered. As a result, the pressure accumulating chamber 53 is formed in a state of enclosing the cylinder chamber 50. 56, the discharge valve that allows movement of the chemical from the lower cylinder chamber to the accumulator chamber 57, in a strainer 57 _a of the lower end, the suction valve which opens in the chemical tank 60, 58, one end to the accumulation chamber lower opening Is a discharge pipe made of a metal pipe, and is soldered to the outer peripheral surface of the cylinder and is soldered to the connection port member 59 provided on the closing member 54 at the upper end 64 thereof. The discharge pipe is a passage for sending the chemical solution to the chemical solution hose 61, which is similarly soldered to the opening 65 of the chemical liquid 54. 63 is a plunger 62 and a cylinder 51
It is a sealing member for maintaining liquid tightness with.

【problem】

Since such a chemical liquid pressure pump is required to have sufficient pressure resistance and corrosiveness, an expensive alloy is used, and as described above, each joint portion of a large number of members is integrated by careful soldering. The process is essential and inevitably expensive. For this reason, attempts have been made to inexpensively mold this type of pump with plastic, but it is difficult to obtain a cylinder or accumulator with uniform composition and strength due to the molding technology. At this time, when the molten resin moving in the mold merges and is integrated to form a cylindrical object, the temperature of the resin at the joint is slightly different depending on the path leading to it, so that it is similar to other parts. It is difficult to perform uniform integration, and a weld line is inevitably created.If the pump operator presses down the plunger with an unnecessarily large force, and a large pressure is applied to the accumulator, the weld line is gently moved. As a result, cracks occurred, which made practical application difficult.

[Constitution of device]

The present invention has been made in response to such a situation, and its gist is to provide a cylinder coaxial with a cylinder for accommodating a manual reciprocating pressurizing means such as a manual piston or a plunger. An outer cylinder is provided, and a diameter of an upper portion of the outer cylinder is reduced to be integrally connected to the outer circumference of the cylinder, and a pressure accumulating chamber surrounded by the cylinder and the outer cylinder is vertically cut and fractionated, and
In the state where the outer peripheral surface of the cylinder and the inner peripheral surface of the outer cylinder are short-circuited and integrally connected, three or more rib plates are provided, and the pressure accumulating chambers divided into three or more by the rib plates communicate with each other at the lower end. A double-pipe structure made of a plastic integrally molded product having a structure in which a discharge port to which a discharge pipe extending below the pressure accumulating chamber can be connected is opened in the upper part of any one of the divided pressure accumulating chambers. A body, a cap portion that detachably engages with a screw portion provided on the lower portion of the outer cylinder to close the bottom surface of the pressure accumulating chamber, and an opening at the center of the cap portion to maintain air and liquid tightness at the lower end of the cylinder. And a manual fitting reciprocating pressurizing means housed in the cylinder, and the central tube portion of the closing member is provided in the cap portion. When communicating with the pressure accumulating chamber via the through hole and the discharge valve communicating with the through hole, To, in a nebulizer manual pump, characterized in that communicates with the liquid tank via the suction valve. As described above, when integrally forming the cylinder and the pressure accumulating chamber, three or more rib plates partitioning the pressure accumulating chamber in the vertical direction are integrally provided to strengthen the structure of the pressure accumulating chamber and to prevent the presence of the rib plate from the cylinder. As a short-circuit path to the outer circumference of the pressure accumulating chamber, it has the effect of accelerating the rotation of the plastic during molding and preventing the occurrence of weld lines. Further, in the atomizer pump having the above-mentioned configuration, the closing member that is detachably fitted to the bottom of the pressure accumulating chamber is provided with a safety valve that operates when the cylinder internal pressure or the pressure accumulating chamber pressure exceeds a certain value. A chemical liquid pressure pump for a nebulizer that ensures safety is also included in the gist of the present invention. Hereinafter, a detailed description will be given based on examples.

【Example】

FIG. 1 shows an embodiment of a chemical liquid pressure pump according to the present invention, in which a cylinder 1 in which a piston rod 11 having a handle 10 at the upper end is fitted, and an outer side of the cylinder 1 coaxially with the cylinder 1. The outer cylinder 2 and the outer cylinder 2.
A pressure accumulating chamber 3 is formed by forming a shape in which the upper part of the is deflected toward the cylinder 1 and integrated at the upper end thereof. The pressure accumulating chamber 3 is divided into a vertical direction 3 by connecting the outer cylinder inner peripheral surface 2a and the cylinder outer peripheral surface 1a to each other.
Rib plates 4, 4 ', 4 "are provided integrally with the outer circumference and the cylinder (see FIG. 2).
Is a notch provided at the lower end of each of the rib plates 4, 4 ′ and 4 ″, and is for communicating the adjacent division chambers 4 b, ... 3 c is a discharge port that opens on the upper surface of the pressure accumulating chamber 3. The double pipe structure D having an open bottom surface of the pressure accumulating chamber 3 is integrally formed by plastic injection molding.On the other hand, the closing member E for closing the bottom surface 3a of the pressure accumulating chamber 3 is Similarly, it is integrally molded from plastic, and it is fitted onto the lower end of the cylinder 1 via an O-ring 20 to extend the cylinder downward, and the central pipe portion 5 and the outer cylinder 2 from the lower end peripheral edge of the cylinder. A cap portion 6 having a rising edge 6a extending from the outer circumference of the central pipe portion 5 and then rising upward so as to close the bottom surface 3a of the pressure accumulating chamber reaching the lower end of the rising edge 6a. The outer cylinder 2 and the outer peripheral surface near the lower end are screwed together. 21 is a seal member for holding the air-tightness and liquid-tightness of the screwed portion 21. A valve ball 7a for closing the suction port 7c by its own weight and a suction port at the lower end 5a of the central pipe section. A suction valve 7 having a strainer net 7b stretched facing to the inside is fitted in. Also, the inside of the central pipe portion 5 has a through hole 5b formed in its peripheral wall and a passage formed in the cap portion 6. A discharge valve 8 that communicates with the hole 6b is provided. Reference numeral 9 is a safety valve that opens the inside of the central pipe portion 5 to a chemical liquid tank when the inside pressure of the central pipe portion 5 becomes equal to or higher than a set pressure, and 9c is a spring (9b) pressure. The adjusting screw 9a is a valve body, and the plastic closing member E is screwed to the lower end of the double pipe structure D integrally formed of plastic to form the chemical liquid pump of the present invention. 1
3 is a discharge pipe composed of a flexible pipe that communicates the discharge port 3c with the lower part of the pressure accumulating chamber, 14 is a chemical hose having one end connected to a spray nozzle rod (not shown), and 17 has an enlarged diameter part in the center,
A joint that connects the chemical liquid hose 14 and the discharge pipe 13, and presses a portion of the chemical liquid hose 14 that is externally fitted to the joint 17 with the nut 18 so as to press the discharge port 3c between the discharge port 3c and the chemical liquid hose. Holds tightly. Reference numeral 15 is a top plate of the chemical liquid tank, and the protruding edge 2b of the outer cylinder 2 is sandwiched and fixed between the rising opening 27 and the pressing cap 26 screwed to the rising opening 27. 20 and 24 are O-rings. 25 is a spring receiver. FIG. 3 is another embodiment of the present invention, in which the safety valve 9 is provided so as to operate when the pressure in the cylinder 1 exceeds a certain dangerous value. What is shown in FIG. 6 is that the safety valve 39 is provided so as to operate when the pressure in the pressure accumulating chamber 3 communicating with the through hole 39a provided in the cap portion 36 exceeds a certain value. As shown in FIG. 4, in the threaded portion between the lower portion of the cylinder 1 and the central pipe portion 35, pressure deformation is not generated near the lower end of the cylinder made of synthetic resin so that the sealing of the fitting portion is not incomplete. The deformation preventing plate 40 is provided between the inner peripheral surfaces of the cylinder in the fitting portion so as to partition the inside of the pipe only in the vertical direction. 38 is a discharge valve.

【effect】

In the sprayer pump of the present application, the cylinder and the outer cylinder 2 of the pressure accumulating chamber are firmly fixed by three or more rib plates extending vertically in the pressure accumulating chamber 3 to obtain sufficient pressure resistance. be able to. Also, when integrally molding the pressure vessel used for this type of atomizer pump with plastic, in the case of the conventional outer cylinder, the resin moves along the circumference while rotating counterclockwise from the gate of the mold and reunites. However, when it becomes a tubular object, temperature changes, etc. occur up to the reunion section, which impairs uniform fusion and integration in the reunion section, and it is unavoidable that weld lines (weld marks) occur. . However, in the case of the present application, such a weld line does not occur because the rib plate acts as a short-circuit passage in resin movement, and therefore, unlike the conventional case, there is almost no accident that the outer cylinder is cracked in the vertical direction due to pressure. . Moreover, even if a flexible pipe such as a soft vinyl chloride pipe is adopted as the discharge pipe, the presence of the rib plate causes the discharge pipe to bend inside the pressure accumulating chamber and the lower end thereof to be located above the pressure accumulating chamber. The effect of guiding the discharge pipe downward and keeping its lower end settled down to the bottom of the pressure accumulating chamber without the problem that the liquid cannot be pumped or the chemical liquid remains in the pressure accumulating chamber and cannot be sprayed to the end. There is. Further, among the pressure accumulating chambers partitioned by the rib plate, the division chamber having the discharge pipe open at the upper portion itself has the same function as the discharge pipe, and therefore, when the volume of the division chamber is small, Can be omitted. Further, the presence of the safety valves 9 and 39 allows the piston (or the plunger) to be inadvertently operated to apply an excessive pressure to the pressure accumulating chamber or the cylinder. Accidents such as breakage of the connecting portion with the closing member are prevented in advance, and undue pressure is repeatedly applied to these members to prevent material fatigue and shorten product life. The sprayer pump of the present application is sufficiently practicable as a plastic sprayer pump only by including the rib plate, but by providing a safety valve as in the embodiment,
The effect will be even greater. Further, since the closing member is removable, it is convenient for cleaning and repairing the pressure accumulating chamber.

[Brief description of drawings]

FIG. 1 is a sectional view showing an embodiment of the present invention. Second
The drawing is an end view taken along the line AA in FIG. Third
FIG. 3 is a partial cross-sectional view showing the main part of another embodiment of the present invention. FIG. 4 is an end view in the BB cross section of FIG. FIG. 5 is an explanatory diagram showing an example of a conventional technique.

Claims (2)

[Scope of utility model registration request] 1. A cylinder capable of accommodating a manual reciprocating pressurizing device has an outer cylinder coaxial with the cylinder, the upper cylinder of which has a reduced diameter and is integrally coupled to the outer circumference of the cylinder. A pressure accumulating chamber surrounded by the outer cylinder and the outer cylinder is vertically cut off and divided, and three or more rib plates for integrally connecting by short-circuiting the outer peripheral surface of the cylinder and the inner peripheral surface of the outer cylinder are provided. The pressure accumulating chambers divided into three or more by the plate communicate with each other at the lower end, and a discharge pipe extending downward to the pressure accumulating chamber can be connected to any one upper portion of the pressure accumulating chambers. A double pipe structure made of a plastic integrally molded product having an opening at an outlet, a cap portion detachably screwed into a screwing portion provided at a lower portion of the outer cylinder to close a bottom surface of the pressure accumulating chamber, An opening is made in the center of the cap, and the bottom of the cylinder is attached and detached by keeping air and liquid tightness. And a manual reciprocating pressurizing means housed in the cylinder, wherein the central pipe part includes a through hole formed in the cap part and a through hole formed in the cap part. A manual pump for an atomizer, which is in communication with the pressure accumulating chamber via a discharge valve communicating with the through hole and is also in communication with a chemical liquid tank via an intake valve. 2. A cylinder capable of accommodating a manual reciprocating pressurizing device has an outer cylinder coaxial with the cylinder, the upper cylinder of which is reduced in diameter to be integrally coupled to the outer circumference of the cylinder, and the cylinder. A pressure accumulating chamber surrounded by the outer cylinder and the outer cylinder is vertically cut off and divided, and three or more rib plates for integrally connecting by short-circuiting the outer peripheral surface of the cylinder and the inner peripheral surface of the outer cylinder are provided. Each of the pressure accumulating chambers divided into three or more by the plate communicates with each other at the lower end, and a discharge pipe extending downward and opening to the pressure accumulating chamber is connected to an arbitrary upper portion of the divided pressure accumulating chambers. A double pipe structure made of a plastic integrally molded product having an open discharge port, and a central pipe which is detachably fitted to the lower end of the cylinder while maintaining air and liquid tightness and has a suction valve at the lower end. And a portion that extends integrally from the central pipe portion in the diametrical direction and stands upright. A cap portion that is detachably screwed into a threaded portion provided at the lower end of the pressure accumulating chamber to close the bottom of the accumulator chamber, and a discharge that communicates the through hole formed in the cap portion with the inside of the central pipe portion. A closing member including a valve and a safety valve that has a communication hole in the cap portion or the central pipe portion and that is activated when the pressure in the pressure accumulating chamber or the lower portion of the cylinder reaches a predetermined pressure or more, and a manual member housed in the cylinder. A reciprocating pressurizing means is provided, and a sprayer pump.