JPH05329212A - Nozzle for spraying liquid chemical - Google Patents

Abstract

PURPOSE:To provide the hygienic and economical sanitary nozzle for spraying a solution of a medicine without generating a liquid sag. CONSTITUTION:This nozzle has a head part 1 formed with an orifice 11 and a tail part 2 fitted into the discharge port of a pressure vessel B and is mounted with a pressure regulating valve 3 between the orifice 11 in the nozzle and the tail part 2. The pressure regulating valve 3 consists of a ball valve 34 and a spring 35 for pressing and energizing the valve to a valve seat 32. The pressure regulating valve 3 is opened to supply the solution of a medicine to the orifice 11 when the pressure of the solution of medicine supplied from the pressure vessel B attains a specified value or above and therefore the discharge of the solution of medicine from the orifice 11 by the low pressure is prevented and the generation of the liquid sag is obviated.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a chemical spray nozzle. More specifically, it relates to a nozzle for spraying a drug solution, which is used when a drug is applied widely and evenly to the skin and the like.

[0002]

2. Description of the Related Art In recent years, the number of agents to be applied to the skin and the like has been increasing. However, when applying agents to a wide range of areas, conventional brushing is not only time consuming but also difficult to apply evenly. In addition, there is a problem that bacteria and the like are likely to adhere to the brush. Therefore, it is proposed to use the nozzle for spraying a chemical solution to cope with such a problem. As a nozzle for spraying a drug solution to apply a drug to the skin or the like, there is, for example, the nozzle described in Japanese Utility Model Laid-Open No. 58-43415.

In this chemical spray nozzle, as shown in FIG. 5A, a core 61 is placed inside a main cylinder portion 51 of a nozzle body 50, and a nozzle 54 is formed in a top wall 53. Also,
At the tail end of the main tubular portion 51, a tubular portion 52 having a diameter that can be fitted into the injection needle mounting tip of the syringe is formed. As shown in FIG. 5C, a recess 55 centered on the nozzle 54 and a plurality of recesses 56 tangentially connected to the recess 55 are formed on the inner surface of the top wall 53. An annular recess 57 is formed on the peripheral side portion of the. As shown in FIG. 5 (B), the core 61 has a small diameter portion 59 formed at both ends of a circular rod piece 58, and a large diameter portion at the center has a plurality of vertical recessed strips formed on the peripheral side wall over its entire length.
60 are formed. In this conventional example, when a small amount syringe of 1 cc or less is used and the nozzle 50 is attached to the tip of the syringe and the plunger of the syringe is pushed, a small amount of drug solution passes through only the vertical groove 60 of the core 61 and the top wall. It flows into the concave stripe 56 on the inner surface of 53, reaches the concave portion 55, and jets from the jet port 54.

[0004]

However, in the chemical spray nozzle 50 according to the conventional example, the cylindrical portion 52 of the nozzle body 50 is used.
When the pressure of the drug solution supplied from the syringe fitted in the container is below a certain value, the drug solution flows out from the nozzle 54 as a liquid, which causes a problem of liquid sagging. That is, immediately after the syringe is fitted into the tubular portion 52 of the nozzle body 50 or immediately after the injection is completed and the injection needle is pulled out, the pressure of the drug solution supplied from the syringe is below a certain value, and the liquid drops from the nozzle 54. Therefore, there is a problem that a portion which does not need to be coated is soiled with the chemical liquid or the chemical liquid is wasted.

In view of such circumstances, the present invention provides a sanitary and economical nozzle for spraying a medicinal solution, which does not cause dripping from a nozzle even when the pressure of the medicinal solution supplied from a syringe is below a certain value. The purpose is to provide.

[0006]

A chemical solution spraying nozzle according to the present invention is a chemical solution spraying nozzle having a head having a nozzle and a tail fitted to the discharge port of a pressure vessel. A pressure adjusting valve is attached between the injection port and the tail part of the pressure vessel, and when the pressure of the chemical solution supplied from the pressure vessel exceeds a certain value, the pressure adjustment valve opens to supply the chemical solution to the injection port. It is characterized in that it is configured.

[0007]

In the nozzle for spraying a chemical solution according to the present invention, a pressure adjusting valve that opens when the pressure of the chemical solution supplied from the pressure container becomes a certain value or more is attached between the nozzle and the tail portion in the nozzle. Therefore, when the pressure of the chemical liquid supplied from the pressure container is equal to or lower than a certain value, the pressure adjusting valve does not open and the liquid does not drip from the injection port. Therefore, the skin and the like are not contaminated with the liquid medicine and are sanitary, and the liquid medicine is economical and economical.

[0008]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows a nozzle A for spraying a chemical liquid, which is an embodiment of the present invention. This chemical liquid spraying nozzle A is used by being fitted to the discharge port of the pressure vessel B shown in FIG. 4, and has a cylinder body 10 having a head portion 1 and a tail portion 2, and the cylinder body 10.
It is composed of a pressure regulating valve 3 inserted inside.
As a material for the cylindrical body 10 and the pressure regulating valve 3, for example, a synthetic resin such as acetal resin, polyethylene, or polypropylene, which has chemical resistance and does not elute, is used.

The head portion 1 of the nozzle A is a portion where the inner diameter of the cylindrical body 10 is substantially the same, and the tip end portion of the cylindrical body 10 is closed by a top wall 12 formed integrally with the cylindrical body 10. Top wall 12
An injection port 11 is formed in the central part of the. Further, the tip end surface of the top wall 12 is formed into a spherical surface or a funnel-shaped recess having a large opening. The tail portion 2 of the nozzle A is a portion in which the inner diameter of the cylindrical body 10 forms an opening taper toward the end portion of the cylindrical body 10 so that it can be fitted into the discharge port of the pressure vessel B. The start end is continuous with the end of the head 1. Since the chemical solution spray nozzle A is used by being firmly fitted to the discharge port of the pressure container B, the discharge port of the pressure container B can be easily fitted into and removed from the tail portion 2 of the nozzle A on the outer periphery of the cylindrical body 10. It forms a brim 4 for urging. In this embodiment, the collar 4 is formed in the vicinity of the boundary between the head 1 and the tail 2. However, the collar 4 may be formed at any portion in the middle of the outer circumference of the cylindrical body 10, and the collar 4 is formed as the cylindrical body 10. It may be integrally molded.

The pressure adjusting valve 3 includes a spring seat 31, a valve seat 32,
It is composed of a locking member 33, a ball valve 34 and a spring 35. The spring seat 31 is a cylindrical body that is inserted into the tip of the cylindrical body 10 of the head 1, one end of which is close to the top wall 12,
A concave cutout is formed in the center of the other end surface, and three vertical grooves 38 are formed at 120 ° intervals on the outer peripheral portion thereof, as shown in FIG. Although three vertical grooves 38 are formed in this embodiment, the number of vertical grooves 38 may be two or less or four or more. The valve seat 32 is a cylindrical body that is inserted into the end portion of the inside of the cylindrical body 10 of the head portion 1, and a seat surface 39 that is a mortar-shaped recess is formed inside one end thereof. The valve seat 32 is inserted into the cylindrical body 10 of the head 1 so that the seat surface 39 faces the concave cutout formed in the spring seat 31.

The locking member 33, as shown in FIG.
It is installed between the spring seat 31 and the valve seat 32 in order to keep a constant distance between the valve seat 32 and the valve seat 32. In the present embodiment, four locking members 33 are used, but it may be plural. For example, the number can be arbitrary. The ball valve 34 is a spherical valve, and is arranged such that one end is in contact with the other end of the spring 35 fitted in the concave cutout formed in the spring seat 31. Therefore, the ball valve 34 is pressed and urged against the valve seat 32 by the spring 35, and the ball valve 34 and the seat surface 39 of the valve seat 32 come into line contact with each other, so that the pressure regulating valve 3 and the tail portion 2 of the nozzle A are completely connected. It will be cut off. The ball valve 34 and the spring 35
As a material of, a metal such as stainless steel is preferably used.

Between the top wall 12 of the head 1 of the nozzle A and the spring seat 31 of the pressure adjusting valve 3, a spacer 36 is installed to form a passage 13 through which the liquid medicine passes, and the pressure adjusting valve is also provided. The pressure adjusting valve 3 is provided on the valve seat 32 side of the cylinder 3 of the head 1
A stopper 37 for fixing inside is attached.
In this embodiment, the spring seat 31 and the valve seat 32 are respectively inserted into the cylindrical body 10 of the head 1, but
It is also possible to integrally form the spring seat 31 and the valve seat 32 with the cylindrical body 10 of the head 1.

Next, a method of spraying the chemical liquid from the injection port 11 using the chemical liquid spraying nozzle A of this embodiment will be described. First, as shown in FIG. 4, the discharge port of the pressure vessel B filled with the chemical liquid is fitted to the tail portion 2 of the chemical liquid spraying nozzle A.
Next, press the plunger 6 of the pressure vessel B to
When the pressure of the chemical liquid supplied from the above is equal to or higher than a certain value, that is, when the pressure of the chemical liquid becomes larger than the biasing force of the spring 35 of the pressure adjusting valve 3, the ball valve 34 opens and the chemical liquid flows into the pressure adjusting valve 3. The chemical passes through the vertical groove 38 of the spring seat 31 and further passes through the passage 13 formed by the spacing member 36 to be atomized and ejected from the injection port 11. At the same time as the spray of the chemical solution ends and the pressure of the chemical solution falls below a certain value, the spring 35
As a result, the ball valve 34 is pressed and urged against the seat surface 39 of the valve seat 32, so that the ball valve 34 is instantly closed and returns to the state before spraying.

As described above, when the pressure of the chemical solution supplied from the pressure vessel B is below a certain value, the ball valve 34 does not open. Therefore, for example, the discharge port of the pressure vessel B filled with the chemical solution is used for spraying the chemical solution. Immediately after being fitted into the tail portion of the nozzle A or immediately after spraying the chemical liquid, even if the chemical liquid flows out from the discharge port of the pressure vessel B, the chemical liquid reaches only the tip portion of the ball valve 34. Therefore, since the liquid does not drip from the injection port 11, the portion that does not need to be coated is not contaminated with the chemical liquid, which is sanitary and the waste of the chemical liquid is economical.

[0015]

According to the present invention, when the pressure of the chemical liquid supplied from the pressure container is below a certain value, the pressure adjusting valve does not open and liquid dripping does not occur from the injection port. It is sanitary without being contaminated with chemicals. Further, there is no waste of the chemical liquid and it is economical, and the effect is remarkable especially in the case of an expensive chemical liquid.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of a chemical liquid spray nozzle according to an embodiment of the present invention.

FIG. 2 is a sectional view taken along line II-II in FIG.

FIG. 3 is a sectional view taken along line III-III in FIG.

FIG. 4 is an explanatory view of a state in which the discharge port of the pressure container is fitted to the tail of the chemical spray nozzle.

FIG. 5 is a cross-sectional view (A) of a conventional chemical solution spray nozzle, a perspective view of a core used in the chemical solution spray nozzle (B), and a cross-sectional view (C) of a top wall of the chemical solution spray nozzle. ..

[Explanation of symbols]

 A Chemical spray nozzle B Pressure vessel 1 Head 2 Tail 3 Pressure adjustment valve 11 Injection port 31 Spring seat 32 Valve seat 33 Locking material 34 Ball valve 35 Spring

Claims (2)

[Claims] 1. A nozzle for spraying a chemical liquid, which has a head having a nozzle and a tail fitted to the outlet of a pressure vessel, wherein a pressure adjusting valve is mounted between the nozzle and the tail in the nozzle. A nozzle for spraying a chemical liquid, characterized in that the pressure adjusting valve is opened to supply the chemical liquid to the injection port when the pressure of the chemical liquid supplied from the pressure container exceeds a certain value. 2. The chemical spray nozzle according to claim 1, wherein the pressure regulating valve comprises a ball valve and a spring for biasing the ball valve against the valve seat.