JPH0433969Y2 - - Google Patents

Description

[Detailed description of the device] [Industrial application field] This device easily transfers a chemical solution from a chemical mixing tank where a drug and water are mixed to create a chemical solution to a chemical tank provided in a backpack-powered sprayer. This invention relates to a chemical solution replenishment device for a backpack-powered sprayer that can be used as a backpack power sprayer.

[Prior Art] Generally, as shown in FIG. 3, a backpack-powered sprayer has a frame (not shown) that can be carried on a backpack, and a chemical tank a and a pump means c capable of pumping the chemical in the tank a to a nozzle b. This is a configuration in which
To replenish the chemical liquid into the chemical liquid tank a, the operator must manually insert the container into another container from the chemical liquid mixing tank in which the chemical liquid is mixed with water.

[Problems to be solved by the invention] Therefore, (1) When replenishing the chemical liquid, the chemical liquid leaks from the injection port of the chemical liquid tank, causing not only loss but also a risk of exposure to the chemical liquid. (2) It is very heavy to carry a full chemical tank on your back from the ground, and it is difficult to raise it to a certain height if you carry it on your back after holding it at a certain height. (3) Since the capacity of the chemical solution tank is relatively small, there are problems such as replenishment is required many times and removal and removal is troublesome.

[Means for solving the problem] This idea was created in view of the above-mentioned circumstances, and includes a frame that can be carried on the back, a chemical tank, and a power sprayer that can force-feed the chemical liquid in the tank to a spray nozzle. and a power source for driving the power sprayer, the chemical liquid tank is connected to the nozzle from the power sprayer via a three-way port from a water inlet formed on a side wall slightly above the bottom of the chemical tank. A pipe line leading to the chemical liquid tank, a pipe line communicating from the power sprayer to the bottom of the chemical liquid tank, and a pipe line leading from the bottom of the chemical liquid tank to the three-way tank are formed, and in the chemical liquid tank there is a pipe line communicating with the bottom of the chemical liquid tank. , a discharge port of an ejector pump that sucks a chemical liquid from a chemical liquid mixing tank is opened, a pipe line that causes the ejector pump to produce an ejector action is branched from a pipe line leading from the power sprayer to the nozzle, and a cottle is interposed in the middle. The present invention proposes a chemical solution replenishing device for a backpack-powered sprayer, which is formed by the chemical solution tank, and includes a detection device in the chemical solution tank that detects the amount of the chemical solution in the chemical solution tank and starts and stops the ejector pump.

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

Figures 1 and 2 are a schematic side view and a schematic piping diagram of a backpack power sprayer equipped with a drug replenishment device according to this invention. is equipped with a chemical solution tank 3, a power sprayer 4 as a first pump means, a power source 5 for driving the power sprayer 4, and a device 6 of the invention.

In this backpack power sprayer, as shown in FIG. 2, the chemical liquid tank 3 has a water intake port 7 formed at the bottom of the chemical liquid tank 3 and a water supply port 8 formed on the side wall slightly above the bottom. , the first port 111 and the second port 11 of the three-way socket 11 with three ports and two positions are connected by pipes 9 and 10, respectively.
2. 3rd port 1 of Mikata Kotoku 11
13 is connected to the suction port 41 of the power sprayer 4. The discharge port 42 of the power sprayer 4 is connected to the joint 12
The nozzle 16 for spraying a chemical solution is connected to a nozzle 16 equipped with an opening/closing socket 15 through a conduit 13 and a discharge hose 14 which can be divided into two parts. Note that reference numeral 43 denotes an overflow port of a pressure regulating valve of the power sprayer 4, and this overflow port 43 is connected to the bottom of the chemical solution tank 3 through a pipe 17. In addition, the chemical liquid tank 3 has a communication pipe type chemical liquid quantity indicator 18.
is placed on the side wall.

As shown in FIG. 2, an ejector pump 19 is attached to the ceiling of the chemical tank 3 in the device 6 of this invention attached to the backpack power sprayer. Note that the ejector pump 19 sucks fluid from the main suction port 193 by an ejector action caused by the flow of fluid from the sub suction port 191 to the discharge port 192 . The main suction port 193 of this ejector pump is
Pipe line 21 that can be divided by joint 20
It is connected via a water absorption hose 22 to a chemical liquid mixing tank 23 that mixes the chemical and water. Note that 24 at the end of the water absorption hose 22 is a strainer. Further, the sub suction port 191 of the ejector pump 19 is connected to the discharge port 42 of the power sprayer 4 by a conduit 26 and a conduit 13 in which a chemical solution replenishment pot 25, which is an on-off valve, is installed.
will be communicated to. Discharge port 19 of ejector pump 19
2 protrudes into the inside of the chemical liquid tank 3, and an on-off valve 27 is attached to its discharge port 192. Opening/closing operations are performed via the

[Function] Since the device 6 of this invention is as described above, the chemical solution can be charged into the chemical solution tank 3 by the following operation.

(1) Place the three-way socket 11 in a state where the ports 111 and 113 in the first position 114 are in communication, and the port 112 is closed.

(2) Close the chemical solution supply pot 25 and the nozzle pot (opening/closing pot) 15, respectively.

(3) Put the water absorption hose 22 into the chemical mixing tank 23.

(4) Pour a small amount (1 to 2) of the chemical into the chemical tank 3 using a separate container.

(5) Start the power source 5 and drive the power sprayer 4. Then, a small amount of the chemical liquid in the chemical liquid tank 3 is absorbed into the suction port 41 of the power sprayer 4.

(6) Open the supply pot 25. Nozzle Kotoku 1
5 is closed, the chemical liquid sucked into the power sprayer 4 is sent under pressure from the discharge port 42 to the sub-intake port 191 of the ejector pump 19 via the conduit 13 and conduit 26. Drained. Then, an ejector action occurs in the ejector pump 19, the main suction port 193 becomes negative pressure, and the chemical liquid in the chemical liquid mixing tank 23 is sucked into the main suction port 193 via the water suction hose 22 and charged into the chemical liquid tank 3. .

(7) When a certain amount of chemical liquid is sucked into the chemical liquid tank 3, the detection unit 28 is activated due to buoyancy, and the on-off valve 2 is activated.
7 is automatically closed, and replenishment of the chemical solution into the chemical solution tank 3 is stopped. Or chemical liquid amount indicator 18
It is confirmed that the water is full by visually checking, and the replenishment is stopped by manually closing the replenishment pot 25.

To spray the chemical liquid replenished into the chemical liquid tank 3, the following operation may be performed.

(1) The three-way socket 11 is switched to a state where the ports 112 and 113 in the second position 115 are communicated with each other, and the port 111 is closed.

(2) With the power sprayer 4 in operation, open the nozzle cock 15. Then, the chemical liquid in the chemical liquid tank 3 is sprayed from the nozzle 16. When the amount of the chemical solution in the chemical solution tank 3 decreases to the water supply port 8 on the side wall of the chemical solution tank 3 due to the spraying operation, air is sucked into the power sprayer 4 from the water supply port 8, and the spraying is stopped. Then, by performing the replenishment operation again, the chemical liquid can be replenished into the chemical liquid tank 3.

[Effects of the invention] As described above, the chemical replenishment device for the backpack power sprayer according to this invention can automatically suck the chemical solution into the chemical tank by operating the kettle, so that the user can easily carry the backpack power sprayer on his or her back. The device can be placed on a stand or the like at an appropriate height, and the chemical solution can be replenished into the chemical solution tank, reducing the effort required to stand up and preventing workers from suffering from back pain or other illnesses.
Furthermore, it has the effect of preventing leakage of the chemical solution, thereby reducing radiation exposure to workers, and improving the troublesomeness of replenishing the chemical solution.

[Brief explanation of the drawing]

FIGS. 1 and 2 are a schematic side view and a schematic piping diagram of a backpack-powered sprayer equipped with the drug solution replenishing device according to this invention, and FIG. 3 is a schematic piping diagram of a conventional backpack-powered sprayer. In the figure, 1...frame, 3...chemical tank, 4...power sprayer, 5...power source, 7...
...Water intake port, 8...Water supply port, 16...Nozzle, 19
...Ejector pump, 192...Discharge port, 23...
. . . chemical liquid mixing tank, 27 . . . opening/closing valve, 28 . . . detection unit.

Claims (1)

[Scope of utility model registration request] A backpack power spraying machine including a drug solution tank, a power sprayer capable of force-feeding the drug solution in the drug solution tank to a spraying nozzle, and a power source for driving the power sprayer, on a frame that can be carried on the back, the drug solution tank having the following features: A conduit from the power sprayer to the nozzle from a water inlet formed on the side wall slightly above the bottom via a three-way socket, a conduit communicating from the power sprayer to the bottom of the chemical tank, and the chemical tank. forming a conduit from the bottom of the pipe to the three-way pot,
In addition, in the chemical liquid tank, a discharge port of an ejector pump that sucks the chemical liquid from the chemical liquid mixing tank is opened at the upper part thereof, and a pipe line that causes the ejector pump to produce an ejector action is connected from the power sprayer to the nozzle. The backpack-powered sprayer is formed by branching off and interposing a kettle in the middle, and is equipped with a detection device in the chemical tank to detect the amount of the chemical in the chemical tank and start and stop the ejector pump. Chemical supply device.