JPH0437636Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field] This invention is a chemical liquid spraying device in which a chemical liquid in a chemical liquid tank is mixed into an air pipe connected to a fan, and is sprayed from the end of the air pipe. It is related to.

[Prior art] This type of conventional chemical spray device is, for example,
As shown in Publication No. 59-127765, first, in the one shown in the fifth figure, a spray nozzle 5 is disposed at the tip of a blow pipe 2 that communicates with a fan 1, and is connected to a chemical tank 4 through a chemical liquid passage 3. , the chemical tank 4 is communicated with a high pressure section 7 of the fan 1 through a pressurizing passage 6.
Then, the inside of the chemical liquid tank 4 is pressurized by the pressure of the high pressure part 7 of the fan 1, and the chemical liquid in the chemical liquid tank 4 is sprayed from the spray nozzle 5 into the air pipe through the passage 3.
The end opening 2 of the air pipe 2 is opened by air from the fan 1.
diffused outward from a. However, in the conventional chemical liquid spraying device described above, the particle size of the sprayed chemical liquid is determined by the combination of the nozzle 5 and the air blower, and it is difficult to spray only fine particles.
When the air blow rate becomes weaker, the particles coming out of the nozzle 5 become coarser, and in extreme cases, they may drip from the end opening 2a of the air pipe 2.

[Problems to be Solved by the Invention] In order to eliminate the drawbacks of the one shown in FIG. 5, as shown in FIG. In some cases, the opening 2a is closed by a filter body 8 made of a high-density fiber material. However, even in the case shown in Fig. 6, as the number of parts for attaching the filter body 8 increases, the filter body 8 may become clogged, and when the airflow becomes weak, the particles of the chemical solution become coarse. ,
As mentioned above, dripping may occur.

[Means for Solving the Problems] This invention was made in view of the above-mentioned circumstances, and includes a pressurizing passage 17 that communicates the high pressure part of the fan 12 and the chemical liquid tank 14, and a chemical liquid passage 13 that connects the chemical liquid tank. 14 and disposed in the blast pipe 11; a closing wall 19 that closes the end of the blast pipe 11; Alternatively, a chemical liquid spraying device is provided which is provided with a plurality of spray ports 20 and a residual liquid fan 21 that communicates with an opening 23 formed at the bottom of the inner surface of the end of the blast pipe 11 via a residual liquid recovery passage 22. It is something.

[Function] In the device configured as described above, the chemical liquid sprayed from the spray nozzle is once diverted by the wall that closes the end of the blast pipe, and then sprayed from the spray port, thereby eliminating coarse particles among the sprayed chemical liquids. This device solves the problems of the conventional device by attaching the liquid to the wall and spraying only fine particles of the chemical solution.

[Example] An example of this invention will be described below based on the accompanying drawings.

FIG. 1 is a partially cutaway schematic side view of the chemical liquid spraying device of this invention. In the figure, reference numeral 11 denotes an air pipe whose base end communicates with a fan 12. A spray nozzle 15 is provided which communicates with a chemical tank 14 through a passage 13. A medical liquid can be injected into the chemical liquid tank 14 from an openable/closable lid 16 disposed above, and a pressure passage 17 allows a fan 1 to be injected into the chemical liquid tank 14.
The high pressure section 18 of No. 2 is connected to the high pressure section 18 of No. 2.

The tip of the blow pipe 11 is closed by a closing wall 19, and one or more spray ports 20 are provided on both left and right sides or above the blow pipe 11 near the closing wall 19.
is drilled. Although it is desirable that the total area of the plurality of spray ports 20 is approximately equal to the cross-sectional area of the blower pipe 11, it is possible to set the diameter and number to an appropriate size according to the required particle size and air volume.

Further, an opening 23 that communicates with the residual liquid tank 21 via the residual liquid recovery passage 22 is formed at an arbitrary position on the bottom of the inner surface of the tip of the blast pipe 11 . Although FIGS. 2 and 3 show a radial cross-sectional view and an axial cross-sectional view of the tip of the blast pipe 11, there is a groove 24 in the bottom of the blast pipe 11 that has a downwardly convex chevron-shaped cross section. It is also possible to form the opening 23 at the lowest part of the groove 24, or to bend the air pipe 11 downward in a convex shape, as shown in the axial cross-sectional view in FIG.
It is also possible to form the opening 23 at the bottom thereof.

Since the chemical liquid spraying device of this invention is as described above, when the chemical liquid pumped from the chemical liquid tank 14 is sprayed from the nozzle 15 into the air pipe 11 by the pressure of the high pressure part 18 of the fan 12, the fan The air blown into the blast pipe 11 by the air blower 12 is transferred to the tip of the blast pipe 11, and after being once deflected by the closing wall 19, it is discharged and diffused from the spray nozzle 20. At this time, among the chemical liquid sprayed from the nozzle 15, coarse particles collide and adhere to the closing wall 19 and remain in the blast pipe 11, and only fine particles are discharged and diffused from the spray port 20. .

The chemical solution left in the blow pipe 11 is collected into the residual liquid tank 21 via the opening 23 and the residual liquid recovery passage 22.

[Effects of the invention] As described above, the chemical liquid spraying device according to this invention can discharge only the fine particles of the chemical liquid sprayed from the nozzle to the outside of the air pipe, and can also This prevents the filter from becoming clogged and making it difficult for the sprayed chemical solution to be discharged from the air pipe, and by collecting the remaining liquid in the air pipe into the residual liquid tank using the opening and residual liquid collection passage. This has the effect of easily preventing dripping.

[Brief explanation of the drawing]

FIG. 1 is a partially cutaway schematic side view of the chemical spraying device of this invention, FIGS. FIG. 4 is an axial cross-sectional view of a blowing pipe according to a further different embodiment of this device, and FIGS. 5 and 6 are schematic side views showing different parts of the conventional device, respectively. In the figure, 11... air pipe, 12... fan, 13... chemical liquid passage, 14... chemical liquid tank,
15... Nozzle, 17... Pressurizing passage, 18... High pressure part of fan, 19... Closing wall, 20... Spray port, 21... Residual liquid tank, 22... Residual liquid collection passage, 23... It is an opening.

Claims (1)

[Scope of utility model registration request] In the chemical liquid spraying device that mixes the chemical liquid in the chemical liquid tank 14 into the blow pipe 11 communicating with the fan 12 and sprays it from the end of the blow pipe 11, the high pressure part of the fan 12 and the chemical liquid tank 14 are connected. A pressurizing passage 17 communicating therewith, a spray nozzle 15 communicating with the chemical liquid tank 14 through the chemical liquid passage 13 and disposed in the blast pipe 11, and a closing wall 19 closing an end of the blast pipe 11. One or more spray ports 20 formed on the side wall of the blast pipe 11 near the closing wall 19 and an opening 23 formed at the bottom of the inner surface of the end of the blast pipe 11 are connected to the residual liquid recovery passage 22. A chemical liquid spraying device that is provided with a residual liquid tank 21 that communicates with the remaining liquid tank 21.