JPH0319371Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Technical Field of the Invention] The present invention relates to a nozzle device for atomizing, for example, a fixed amount of a vaccine or the like.

[Background of the idea]

Various vaccines are used to prevent infectious diseases in various animals. Vaccines are administered by various methods depending on the infection mode of the pathogen, and some vaccines are administered by spraying a liquid vaccine into the nasal cavity of an animal. In this type of vaccine administration work, it is desirable that a constant dose of about 1 cc of vaccine be administered accurately and continuously.

[Prior art]

Although it is possible to spray-administer a fixed amount of vaccine, it is not possible to accurately spray a fixed amount continuously. Under these circumstances, a nozzle device that can continuously supply a fixed amount is desired.

[Purpose of invention]

Therefore, an object of the present invention is to provide a spray nozzle device that can continuously supply a fixed amount of liquid such as a vaccine.

[Summary of the idea]

Therefore, the present invention incorporates two pistons capable of reciprocating movement inside the main body of the device, moves one piston using pressure fluid when the trigger is operated, and measures the spray liquid inside the movement space of the other piston. After the metering, the sprayed liquid can be sprayed in an atomized state.

〔Example〕

First, FIG. 1 shows the overall configuration of a quantitative supply nozzle device 1 of the present invention.

This metered supply nozzle device 1 has a spray part 3 detachably attached to the tip side of the device body 2, and a spray part 3 detachably attached to the rear end portion of the device body 2 by a detachable nut 4. A measuring section 5 is provided. The device main body 2 has a connection port 7 at its lower end for introducing pressure fluid 6, and is also provided with a trigger 8 that is swingable about a support shaft 9.

Next, FIG. 2 shows the inside of the device body 2 as well as
The structure of the spraying section 3 and the measuring section 5 as the main parts of the present invention is shown. In addition, in FIG. 2, the spray section 3 is compressed and drawn short due to space limitations.

A passage 10 communicating with the connection port 7 is formed in the device main body 2, and a ball valve 11 and a valve seat 12, which are biased by a spring 11a, are assembled in the middle part of the passage 10 with a fixing nut 13. There is. The valve seat 12 and fixing nut 13 slidably hold a trigger rod 14 driven by the trigger 8 at the center.

In addition, a piston chamber 15 is provided at the rear end portion of the device main body 2.
is integrally formed, and a cap 16 is screwed into this opening surface. Inside this piston chamber 15, a first piston 18 biased by a spring 17 and a pipe 20 fixed by the first piston 18 and reaching the spray section 3 inside the supply path 19 are slidably attached. It has been inserted. The passage of this pipe 20 constitutes a fluid passage 21 that guides the spray fluid to the spray section 3. Further, a housing 22 is detachably attached to the rear end surface of the cap 16. A second piston 23 is slidably inserted into the housing 22, and one end of the second piston 23 is removably screwed to the first piston 18. Note that the first and second pistons 18, 23
A piston ring 18a for airtightness is provided on the circumferential surface of the
23a is fitted.

A space region between the second piston 23 and the rear end wall 22a of the housing 22 forms a measuring chamber 24 of about 1 [cc]. This metering chamber 24 communicates with the fluid passage 21 via a passage hole 25 provided in the wall of the pipe 20. A center portion of the rear end wall 22a is penetrated, and a valve hole member 26 is fitted and fixed in this through hole. A tapered valve body portion 20 a provided at the rear end of the pipe 20 is inserted into the valve hole of the valve hole member 26 .
A check valve 33 is formed by a and the valve hole.

A fitting 29 is incorporated into the rear end of the housing 22 via a holder 28 with a detachable nut 4, and a spray fluid 45 is installed in this fitting 29.
A container 30 containing the following is connected via a joint member 31. The inside of the container 30 in which air can be replaced is at atmospheric pressure and communicates with a check valve 33 via an inflow path 32.

A spray section 3 is provided at the tip of the main body 2 of the device. This spraying section 3 is constructed by a nozzle head 34 screwed and fixed to the tip of the device main body 2, a sleeve 35 screwed and fixed to the nozzle head 34, a nozzle 36 interposed and held between these, and a valve spring 37 at the rear. The main component is a slidable nozzle valve body 38 whose end face is urged against the tip face of the pipe 20. The tip of the nozzle 36 faces the spout 39 of the nozzle head 34, and the rod 38a at the tip of the nozzle valve body 38 is inserted into the nozzle hole 40 of the nozzle 36. A member of the nozzle valve hole 41 is fitted into the inlet portion. The nozzle valve hole 41 and the nozzle valve body 38 constitute a nozzle valve 44. One end of the valve spring 37 is locked to the rear end surface of the nozzle 36, and the other end is locked to the base flange-like surface of the nozzle valve body 38 in a compressed state, so that the nozzle valve body 38 , second piston 18,2
3, that is, the sliding movement of the pipe 20.

A fluid guide hole 42 is formed at the tip of the pipe 20, and the fluid passage 21 passes through the fluid guide hole 42, and then through a nozzle valve 44 to the nozzle hole 40.
It is familiar to On the other hand, the passage 10 of the pressure fluid 6 is
The nozzle head 34 communicates with the spout 39 through a through hole 43 provided in the peripheral wall thereof.

Next, the operation of the quantitative supply nozzle device 1 will be explained.

The user pulls the trigger 8 and the trigger rod 14
When the ball valve 11 is separated from the valve seat 12 by
The pressure fluid 6 enters the front end side chamber of the piston chamber 15 through the passage 10 and flows into the first and second pistons 1.
8, 23 and the pipe 20 are pushed back by the pressure. At this time, the hole of the valve hole member 26 is closed by the thick part of the pipe 20. The inside of the metering chamber 24 is pressurized by the backward sliding of the second piston 23, and the spray fluid 45 inside the metering chamber 24 is transferred to the passage hole 25.
It flows into the fluid passage 21 through the fluid guide hole 4.
2 and reaches the nozzle valve 44. As a result of the nozzle valve body 38 moving backward by the force of the valve spring 37 following the backward movement of the pipe 20, the tips of the nozzle valve hole member 41 and the nozzle hole 40 are opened, so that a certain amount of the spray fluid 45 is released. flows into the nozzle hole 40,
It mixes with the pressure fluid 6 extending from the through hole 43 to the spout 39, and is atomized from the spout 39 and spouted to the outside. At this time, a part of the pressure fluid 6 flows out through the supply path 19 and the through hole 43, but the through hole 43
Since the pressure fluid 6 is sufficiently constricted and the amount of outflow there is small, there is almost no pressure drop of the pressure fluid 6 inside the supply path 19 and the piston chamber 15 communicating therewith. Therefore, as long as a sufficient amount of pressure fluid 10 is continuously supplied from the passage 10, the first piston 18 is pushed by the pressure fluid 6 and the spring 1
7 and sliding resistance, the spray fluid 45 in the metering chamber 24 is pressurized, and the spray fluid 45 is forced from the fluid passage 21 to the nozzle hole 4.
Supply to 0.

Next, when the user stops the trigger operation,
That is, when the trigger 8 is released, the trigger rod 14 returns to its original position and the ball valve 11 closes the passage 10. Therefore, the first and second pistons 18 and 23 and the pipe 20 are returned to their original positions by the biasing force of the spring 17. At this time, the thin valve body portion 20a
As a result, the hole of the valve hole member 26 becomes open.
By the return of the first and second pistons 18 and 23, the inside of the metering chamber 24 becomes negative pressure, and a certain amount of the spray fluid 45 flows from the inflow path 32 into the container 30 while displacing the air inside the container 30. After that, the measuring chamber 24 is replenished. On the other hand, as the pipe 20 returns, the nozzle valve body 38 also returns to its original position, so the valve hole of the nozzle valve hole 41 is closed and ready for the next trigger operation.

Note that while the trigger operation is stopped, the nozzle valve body 38
Since the rod portion 38a is inserted into the tip of the nozzle hole 40, foreign matter is prevented from entering the nozzle hole 40.

[Effect of idea]

In this invention, when the trigger is operated, the pressure fluid moves the first and second pistons backward, so that a constant amount of the spray fluid in the metering chamber is always injected regardless of the trigger pull time. Therefore, a fixed amount of liquid such as a vaccine can be easily and accurately sprayed, and since the liquid is automatically replenished after the spraying operation, the liquid can be continuously sprayed.

[Brief explanation of the drawing]

FIG. 1 is a side view of the quantitative supply nozzle device of the present invention, and FIG. 2 is an enlarged sectional view of the main parts. 1... fixed quantity supply nozzle device, 6... pressure fluid,
8...Trigger, 17...Spring, 18...First piston, 21...Fluid passage, 23...Second
Piston, 24... Measuring chamber, 30... Container, 3
2... Inflow path, 33... Check valve, 36... Nozzle, 38... Nozzle valve body, 40... Nozzle hole, 4
5...Spray fluid.

Claims (1)

[Claims for Utility Model Registration] In the fixed quantity supply nozzle device 1 which supplies a fixed amount of spray fluid 45 from the nozzle hole 40 based on the pressurizing action of the pressure fluid 6 accompanying the trigger operation, the inside of the piston chamber 15 provided in the main body 2 of the device a first piston 18 that slides when pressurized by pressure fluid 6; a spring 17 that returns the first piston 18 when the trigger operation is stopped; an inflow path 32 for the atomizing fluid 45; and a check valve. The measuring chamber 24 communicates with the first piston 1 through the
8, a second piston 23 that slides within the metering chamber 24 in conjunction with the metering chamber 24, a fluid passage 21 that guides the spray fluid 45 in the metering chamber 24 to the nozzle hole 40, and the first and second pistons 18, A quantitative supply nozzle device 1 characterized in that it comprises a nozzle valve 44 that controls opening and closing of a nozzle valve hole 41 communicating with a nozzle hole 40 in conjunction with the sliding movement of a nozzle valve 23.