JP2002045069A - Medicinal liquid-feeding device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable the automatic feeding of a medicinal liquid set with the timing that many domestic animals want drinking water. SOLUTION: This medicinal liquid-feeding device is equipped with a movable member 105 sliding within a drinking water-feeding tube 101 in accordance with the flowing amount of the drinking water, a distortion sensor changing its shape by the slide of the movable member 105 and a regulating part 107 for detecting an electric resistance changing with the shape change of the distortion sensor 106, and when the detected resistance value becomes higher than a prescribed value, actuating a pump 104 for feeding an aqueous medicinal solution from a tank 103 storing the aqueous medicinal solution to the drinking water-feeding tube 101 through a connecting tube 102 and also adjusting the working output of the pump 104 in accordance with the change in the resistance value of higher than the prescribed value.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a drug solution supply device which mixes a predetermined amount of a drug solution with drinking water passing through a drinking water supply pipe and can supply a drug solution mixed with the drug solution.

[0002]

2. Description of the Related Art For example, in raising livestock such as swine, poultry, and dairy cows, water-soluble drugs such as antibacterial substances and vitamins (drug aqueous solutions) are used for livestock in order to prevent diseases and manage nutrition. ) Is administered. And as a device for supplying such a chemical solution,
Conventionally, for example, the one shown in FIG. 5 is known. That is, the introduction connecting pipe 306 connected to an appropriate position of the drinking water supply pipe (drinking water supply pipe) 305 and the connection to the drinking water supply pipe 305 at an appropriate distance from a portion to which the introduction connecting pipe 306 is connected. And a mixing valve 300 that mixes drinking water and a drug aqueous solution and discharges the drug solution inside the connecting pipe 307.

As shown in FIG. 6, a mixing valve 300 has a casing 301 in which a liquid introduction hole 301a connected to an introduction connection pipe 306 and a liquid discharge hole 301b connected to a discharge connection pipe 307 are formed. A piston 302 slidably mounted in the casing 301; a piston rod 303 connected to the piston 302;
And a cylinder 304 fixedly disposed in the casing 301 and holding the piston rod 303 in a slidable manner. .

[0004] Such a drug solution supply device also supplies only drinking water in a normal state, and mixes the drug aqueous solution sucked up by the mixing valve 300 into the drinking water as needed.
As shown in FIG. 5, the first opening / closing valve 3 is provided near the connection portion of the drinking water supply pipe 305 with the introduction connection pipe 306.
05a is provided with second and third opening / closing valves 306a, 307a in each of the connecting pipes 306, 307, respectively.

When only drinking water flowing in the direction of arrow X in FIG. 5 is supplied, the second and third opening / closing valves 306a and 307a are closed and the first opening / closing valve 305a is opened. Supply. When mixing the chemical aqueous solution, the first opening / closing valve 305a is closed, the second and third opening / closing valves 306a, 307a are opened, and drinking water is introduced into the connecting pipes 306, 307, and the mixing valve is opened. 300
Through which the aqueous solution of the drug is mixed, and the solution mixed with the aqueous solution of the drug is supplied from the connecting pipe 307 for derivation to the drinking water supply pipe 305.
To supply to livestock.

More specifically, as shown in FIG. 6, in the mixing valve 300, when drinking water flows from the X direction, the piston 302 is pushed up, and the second valve body 302d causes the second valve body 302d to push the second valve hole 302b. Is closed to open the first valve hole 302a.
At this time, the drug aqueous solution is simultaneously supplied with the mixed liquid introduction hole 304a.
Through the cylinder 304. The drug solution in which the drug aqueous solution is mixed into the drinking water passes through the first valve hole 302a and flows out of the liquid outlet hole 301b. On the other hand, piston 3
02 lowers, the first valve hole 302a is closed by the first valve body 302c, and the drug aqueous solution in the cylinder 304 is discharged into the casing 301 and mixed with drinking water. The chemical mixed with the aqueous solution is supplied through the liquid outlet 301b.

[0007]

In the case where a large amount of livestock is administered with a drug solution mixed with an aqueous drug solution,
It is preferred that the livestock be given the opportunity to drink, rather than be compulsory. In addition, when some of the livestock want water, it is desired to give water only without supplying the drug solution, and to administer the drug solution when a large number of livestock want water, such as after eating. However, the conventional chemical liquid supply device uses only the drinking water supply pipe when supplying only drinking water, and closes the drinking water supply pipe and supplies using the connecting pipe when supplying the chemical liquid. Therefore, it is necessary to operate a plurality of opening / closing valves to switch between the supply of drinking water and the supply of chemicals. In addition, in order to supply chemicals at the timing when a large number of livestock want drinking water, the breeder must always There is a disadvantage that the condition of livestock must be monitored. In addition, in order to suck up the drug aqueous solution stored in the tank and mix it with drinking water, it is necessary to connect and dispose the above-described mixing valve to the connecting pipe, and the structure is complicated.

[0008] The present invention has been made in view of the above points, and can supply a drug solution mixed with a drug solution with a simple structure. It is an object to provide a chemical solution supply device that can automatically supply a chemical solution.

[0009]

According to a first aspect of the present invention, there is provided a drug solution supply apparatus for mixing a predetermined amount of a drug aqueous solution into drinking water passing through a drinking water supply pipe. In a chemical liquid supply device capable of supplying a chemical liquid mixed with, a movable member that slides in the drinking water supply pipe in accordance with the flow rate of the drinking water, a distortion sensor whose shape changes due to the sliding of the movable member, Detecting an electrical resistance that changes due to a change in shape, and when the detected resistance value is equal to or greater than a predetermined value, supplies the aqueous drug solution into the drinking water supply pipe via a connecting pipe from the tank in which the aqueous drug solution is stored. Start the pump
A control unit that adjusts the operation output of the pump in response to a change in the resistance value that is equal to or greater than a certain value. The drug solution supply device of the present invention according to claim 2 is a drug solution supply device capable of supplying a drug solution mixed with a predetermined amount to drinking water passing through a drinking water supply pipe and supplying the drug solution mixed with the drug solution. A magnet that slides in the drinking water supply pipe in accordance with the flow rate, and is disposed at a position where the magnet approaches or separates when the flow rate of the drinking water becomes a certain amount or more, and is turned on by suction or repulsion by the magnet. Or a reed switch that operates off,
It starts by the reed switch being turned on,
A pump for supplying the aqueous drug solution into the drinking water supply pipe via a connecting pipe from inside the tank in which the aqueous drug solution is stored,
It is characterized by having. According to a third aspect of the present invention, there is provided the chemical liquid supply apparatus according to the first or second aspect, wherein the liquid for detecting that the amount of the aqueous chemical solution stored in the tank is equal to or less than a predetermined amount. An amount sensor, wherein the liquid amount sensor is set to forcibly stop the operation of the pump when detecting that the liquid amount of the chemical aqueous solution in the tank has become equal to or less than a predetermined amount. I do.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in more detail based on embodiments shown in the drawings. First, a chemical solution supply device according to a first embodiment of the present invention will be described with reference to FIGS. As shown in FIG. 1, the liquid medicine supply device according to the present embodiment includes a drinking water supply pipe 101, a connection pipe 102,
It has a tank 103, a pump 104, a movable member 105, a strain sensor 106, a control unit 107, and a liquid amount sensor 108.

[0011] The drinking water supply pipe 101 further includes an introduction pipe 101a, a derivation pipe 101b, and both pipes 101a, 101a.
01b is provided with a connection pipe 101c. One end of the introduction pipe 101a is connected to a water supply device or a faucet (not shown) for storing and supplying drinking water, and the other end is connected to one end of the connection pipe 101c. One end of the lead-out pipe 101b is connected to the other end of the connection pipe 101c, and the other end is provided so as to be able to supply drinking water or a chemical solution to a livestock drinking place or the like (not shown). Further, the connection pipe 101c is provided on the peripheral wall on the other end side with the connecting pipe connection portion 10c.
The movable member 105 and the strain sensor 106 are disposed inside the hollow portion 1d.

Here, the movable member 105 is formed in a substantially T-shaped cross section having a large diameter portion 105a having a predetermined outer diameter and a small diameter portion 105b having an outer diameter smaller than the large diameter portion 105a. In a state where the flow of drinking water is stopped, the large-diameter portion 105 of the movable member 105 is fixedly disposed in the connection pipe 101c and provided on an end wall facing the flow direction of the drinking water.
a through-hole 109 having an inner diameter slightly larger than the outer diameter of a
The large-diameter portion 105a is held by the holder 109 in which “a” is formed so as to fit into the through hole 109a of the holder 109.

The strain sensor 106 is a resistor made of a combination of an elastic material such as silicon rubber and a conductive material. The strain sensor 106 has a property that the electric resistance changes due to a change in shape (strain) generated when an external force is applied. The sensor used. The strain sensor 106 is disposed so as to face the holder 109 holding the movable member 105 at a predetermined interval in the flow direction of the drinking water, and both ends are connected to the connection pipe 101c.
Is fixed to the inner peripheral surface of the movable member 105.
Connected to the tip of the

The connecting pipe 102 further includes a connecting pipe 1 for introduction.
02a, connection pipe 102b for derivation and both connection pipes 102a,
It has a connecting connecting pipe 102c for connecting the connecting pipe 102b. One end of the introduction connecting pipe 102a is disposed near the inner surface of the bottom wall of the tank 103 in which a water-soluble drug (aqueous drug solution) such as an antibacterial substance or a vitamin agent is stored, and the other end is connected to one end of the connection connecting pipe 102c. Are connected to a suction-side check valve 102d interposed between them. The outlet connection pipe 102b is connected at one end to a discharge-side check valve 102e interposed between the connection pipe 102b and the other end of the connection pipe 102c, and has the other end forming a drinking water supply pipe 101.
It is connected to a connecting pipe connecting portion 101d protruding from 1c. In addition, an introduction portion 104d for introducing a drug solution into a cylinder 104c constituting a pump 104 described below is provided in a middle portion of the connection connecting pipe 102c.

The pump 104 further includes a motor 104
a, a piston 104b and a cylinder 104c. When the motor 104a rotates, the drive of the pump 104 is transmitted to a piston 104b via a transmission member 104d, and the piston 104b is
In FIG. 1, the chemical solution in the tank 103 is slid in the vertical direction in FIG.
The liquid medicine is sucked into the cylinder 104c through a, and is discharged from the cylinder 104c and supplied into the drinking water supply pipe 101 through the connecting pipe 102b. The above-described suction side check valve 102d
And the discharge side check valve 102 e
When supplying the aqueous drug solution to the drinking water supply pipe 101 by
The backflow of the aqueous drug solution passing through the connecting pipe 102 is prevented.

The control unit 107 is composed of an electronic circuit.
Motor 1 constituting strain sensor 106 and pump 104
04a are connected to each other. This control unit 10
7 detects an electric resistance that changes due to a change in the shape of the strain sensor 106. Then, when the detected resistance value is equal to or more than a certain value, an electric signal is output to the pump 104,
The pump 104 is started. Note that the resistance value for starting the pump 104 can be set arbitrarily. This control unit 1
07 is set so as to adjust the operation output of the pump 104 in accordance with the detected change in the resistance value equal to or more than the fixed value. That is, when the detected resistance value reaches a preset resistance value, the motor 104a constituting the pump 104
Is rotated, and if a resistance value higher than that is detected, the rotation of the motor 104a is adjusted in accordance with the change in the resistance value. For example, if the detected resistance value is small, the motor 104
a, the operation output of the pump 104 is reduced, and if the detected resistance value is large, the motor 104a
Is set to increase the rotation of the pump 104 and improve the operation output of the pump 104.

The liquid amount sensor 108 comprises a photo sensor having a light emitting section 108a and a light receiving section 108b. However, the liquid amount sensor is not limited to the photo sensor as long as it can detect the liquid amount of the aqueous solution of the medicine in the tank 103, and various sensors can be used. The liquid amount sensor 108 has a liquid amount detection tube 110 whose one end is arranged near the inner surface of the bottom wall of the tank 103 and whose other end is arranged at a predetermined height outside the tank 103. The level of the aqueous solution of the drug guided into the tube of the liquid amount detection tube 110 changes in accordance with the amount of the aqueous solution of the drug in the tank 103. Outside the tank 103, a portion 110a bent substantially U-shaped below the bottom wall of the tank 103
A photo sensor including a light emitting unit 108a and a light receiving unit 108b is disposed near the light emitting unit 108a and the light receiving unit 10b.
8b, the liquid amount detection tube 110 is provided. Then, the float 110b floated on the liquid surface of the drug aqueous solution guided into the liquid amount detection tube 110 descends as the drug aqueous solution in the tank 103 decreases,
As shown in FIG. 3, the light emitting unit 108a and the light receiving unit 108b
Between the light emitting unit 108a and the light receiving unit 108
The light irradiated to b is blocked. Thereby, the liquid amount sensor 108 detects that the liquid amount of the aqueous drug solution in the tank 103 has become equal to or less than a certain amount. This liquid amount sensor 10
8 is wired and connected to the control unit 107, and when the liquid amount sensor 108 detects the liquid amount of the drug aqueous solution as described above,
An electric signal is no longer output from the control unit 107 to the pump 103, so that the operating pump 103 is forcibly stopped. In such a state, even when the control unit 107 detects a resistance value equal to or more than a certain value due to a change in the shape of the strain sensor 106, the control unit 1
No electric signal is output to the pump 103 from 07, and the pump 103 that has not been operated does not start.

The chemical supply device according to the present embodiment is used, for example, when administering a chemical to a large number of livestock. This chemical solution supply device first has a main power switch 111
Is turned on to enter a standby state. When several livestock want to drink water, the livestock pushes the closing member (not shown) closing the other end of the lead-out pipe 101b constituting the drinking water supply pipe 101 with the tip thereof in a normal state. A discharge port constituting the other end of the outlet pipe 101b is opened, and the drinking water filled in the drinking water supply pipe 101 is discharged from the discharge port. Thereby, a flow of drinking water occurs in the drinking water supply pipe 101. At this time, the movable member 105, whose large-diameter portion 105a is inserted into and held in the through-hole 109a of the holder 109, receives the pressure of drinking water flowing through the drinking-water supply pipe 101, so that the large-diameter portion 105a 109
Remove from a and slide along the flow direction of drinking water.
The slide causes the strain sensor 106 to be pulled and deformed. However, in such a case, the amount of drinking water consumed by livestock is small, and
1, the flow rate of drinking water passing through the strain sensor 10 is small.
6, the resistance value detected by the control unit 107 does not reach the preset constant value. Therefore, since the pump 104 does not start and the aqueous solution of the drug is not supplied to the drinking water supply pipe 101, only drinking water is administered to livestock.

On the other hand, when a large number of livestock want drinking water, the amount of drinking water consumed by those livestock as a whole increases, and the flow rate of drinking water passing through the drinking water supply pipe 101 increases. Accordingly, as shown in FIG. 2, the sliding distance of the movable member 105 along the flow direction of the drinking water becomes longer, and the deformation amount of the strain sensor 106 also becomes larger. Then, when the resistance value detected by the control unit 107 becomes equal to or more than a certain value, the pump 104 starts. As a result, the drug aqueous solution stored in the tank 103 is connected to the connecting pipe 1.
No. 02 is introduced into the connecting connecting pipe 102c through the connecting connecting pipe 102a, sucked into the cylinder 104c from the introducing section 104d, and then pressed by the piston 104b to be discharged from the cylinder 104c. By repeating the operation, the water is supplied into the drinking water supply pipe 101 through the connection pipe 102b for derivation. In the drinking water supply pipe 101, the supplied drug aqueous solution is mixed with the drinking water, and the drinking water and the drug aqueous solution are mixed into a drug solution while passing through the outlet pipe 101b. Then, the drug solution is discharged from a discharge port constituting the other end of the lead-out pipe 101b and is administered to livestock.

As described above, according to the liquid medicine supply apparatus according to the present embodiment, the liquid to be administered to livestock and the liquid medicine are automatically switched according to the flow rate of the drinking water passing through the drinking water supply pipe 101. be able to. Therefore, it is not necessary for the breeder to constantly monitor the livestock condition. In addition, it is possible to supply a chemical solution at the timing when many livestock want water.

Further, according to this chemical liquid supply apparatus, the shape of the distortion sensor 106 changes in an analog manner in accordance with the flow rate of drinking water passing through the drinking water supply pipe 101, and the control unit 107
Are set to detect an electrical resistance that changes due to a change in the shape of the strain sensor 106, and adjust the operation output of the pump 104 in accordance with the detected change in the resistance value that is equal to or greater than a certain value. Therefore, the mixing amount of the drug aqueous solution can be automatically adjusted according to the flow rate of the drinking water passing through the drinking water supply pipe 101, and the dilution rate of the drug aqueous solution can be always kept constant.

Further, according to this medicine supply device, there is provided a liquid amount sensor 108 for detecting that the liquid amount of the medicine aqueous solution stored in the tank 103 has become equal to or less than a predetermined amount. When the control unit 107 detects that the amount of the aqueous drug solution in the inside has become equal to or less than a certain amount, the control unit 107 stops outputting the electric signal to the pump 104, and the operation of the pump 104 is forcibly stopped. I have. Therefore, when the amount of the aqueous solution of the drug in the tank 103 falls below a certain amount, the pump 103 does not operate, so that the connection pipe 102 and the cylinder 103c must be constantly filled with the aqueous solution of the drug. Can be. Accordingly, it is possible to prevent the medicine in the medicine aqueous solution from drying due to contact with air and adhering to the inner surfaces of the connection pipe 102, the cylinder 103c, and the like. As a result, the connecting pipe 1
02 can be stably supplied to the drinking water supply pipe 101 without the clogging of 02, etc.

Next, a chemical solution supply device according to a second embodiment of the present invention will be described with reference to FIG. The liquid medicine supply device according to the present embodiment includes a drinking water supply pipe 201, a connection pipe, a tank, a pump, a magnet 202, and a reed switch 203.
And a liquid amount sensor. Among these components, the connecting pipe, the tank, the pump, and the liquid amount sensor are the connecting pipe 102, the tank 103, the pump 104, and the liquid amount sensor 108 that constitute the chemical solution supply device according to the first embodiment. Since the same one as described above can be used, the description is omitted.

As shown in FIG. 4, the drinking water supply pipe 201
Further includes an introduction pipe 201a and a derivation pipe 201b.
And a connecting pipe 2 for connecting the two pipes 201a and 201b.
01c, and the connecting pipe connecting portion 201d protrudes from the peripheral wall on the other end side of the connecting pipe 201c, so that the drinking water forming the chemical liquid supply device according to the first embodiment described above is provided. The first configuration is similar to that of the supply pipe 101 except that a magnet 202 is provided inside the connection pipe 201c and a reed switch 203 is provided at an appropriate position on the outer periphery of the connection pipe 201c. It is different from the drinking water supply pipe 101 of the chemical liquid supply device according to the embodiment.

Here, the magnet 202 is held in a cylindrical holder 204 having an outer diameter slightly smaller than the inner diameter of the connection pipe 201c, and the holder 204 is placed at one end in the connection pipe 201c. Is the introduction pipe 201a
A first spring 205a, the other end of which is supported by one end of the holder 204;
And the other end thereof is urged by a second spring 205b whose other end is supported by one end of the outlet pipe 201b. And introduction pipe 2
When the drinking water flows from the 01a side to the outlet pipe 201b side, the facing surfaces of the magnet 202 and the holder 204 facing in the flowing direction of the drinking water receive the pressure of the drinking water, and the holder 204 is in the connection pipe 201c. The second spring 205b is compressed and slid toward the lead-out pipe 201b while being compressed.
Slide to b side. On the other hand, when the pressure of the drinking water that presses the opposing surfaces of the magnet 202 and the holder 204 decreases or the flow of the drinking water stops, the holder 204 and the magnet 202 return to their original positions by the urging force of the second spring 205b. .

The reed switch 203 is normally
The connection pipe 201c is disposed at a predetermined distance in the axial direction of the connection pipe 201c from the magnet 202 at a position near the other end of the connection pipe 201c. This reed switch 203
In a normal state, the contact portions are separated and in an off state, and when the magnet 202 slides and approaches the lead-out pipe 201b side, the contact portions are attracted by the magnetic force of the magnet 202 and come into contact with each other to be turned on. The reed switch 203 is wired and connected to a motor constituting the pump, and when turned on, rotates the motor to start the pump. As a result, the piston constituting the pump slides in the cylinder, sucks up the drug aqueous solution from the tank, and the pump supplies a predetermined amount of the drug aqueous solution to the drinking water supply pipe through the connecting pipe. When the magnet 202 is close to the reed switch 203, the contact portion is separated by the repulsive action of the magnet 202 and is in an off state, and when the magnet 202 slides to the lead-out pipe 201b side and is separated. It is also possible to use one that is turned on upon contact of the contact portion. When such a reed switch 203 is used, the magnet 2
The reed switch 203 is disposed at substantially the same position as the position where the magnet 202 is disposed in a normal state without leaving a predetermined interval in the axial direction of the connection pipe 201c with respect to the position of the connection pipe 201.

The chemical supply device according to the present embodiment is also used when administering a chemical to a large number of livestock, similarly to the chemical supply device according to the first embodiment described above. And when some of them want water,
Outgoing pipe 2 constituting drinking water supply pipe 201 under normal conditions
When the livestock pushes the closing member (not shown) closing the other end of the outlet pipe 01b with the tip of the mouth, the discharge port forming the other end of the outlet pipe 201b is opened, and the drinking water supply pipe extends from the outlet. The drinking water filled in 201 is discharged. Thereby, a flow of drinking water occurs in the drinking water supply pipe 201. At this time, the opposing surfaces of the magnet 202 and the holder 204 facing the flow direction of the drinking water receive the pressure of the drinking water. In such a case, the amount of the drinking water consumed by the livestock is small, and the drinking water passes through the drinking water supply pipe 101. Since the flow rate of the drinking water is small, the pressure of the drinking water received by the facing surface is smaller or slightly larger than the urging force of the second spring that urges the holder 204. Therefore, the magnet 202 does not slide from the position in the normal state to the lead-out pipe 201b side, or the distance is short even if it slides.
Since the reed switch 203 does not reach the position where 03 is disposed, the reed switch 203 does not turn on. As a result, the pump 104 is not activated, and the supply of the aqueous drug solution to the drinking water supply pipe 101 is not performed, so that only drinking water is administered to livestock.

On the other hand, when a large number of livestock want drinking water, the amount of drinking water consumed by those livestock as a whole increases, and the flow rate of drinking water passing through the drinking water supply pipe 201 increases. Along with this, the pressure of drinking water that presses the opposing surfaces of the magnet 202 and the holder 204 also increases, so that the sliding distance of the magnet 202 along the flow direction of drinking water also increases. When the flow rate of the drinking water passing through the drinking water supply pipe 201 becomes equal to or more than a certain amount and the magnet 202 slides to a position close to the reed switch 203, the magnetic force of the magnet 202 causes the contact portion of the reed switch 203 to come into suction contact. . As a result, the reed switch 203 is turned on to start the pump, and the pump supplies the aqueous solution of the drug in the tank to the drinking water supply pipe 201 through the connection pipe. In the drinking water supply pipe 201, the supplied drug aqueous solution is mixed with the drinking water, and the drinking water and the drug aqueous solution are mixed in the process of passing through the outlet pipe 201b, as in the drug solution supply device according to the above-described first embodiment. It becomes a chemical solution. Then, the chemical solution is supplied to the outlet pipe 20.
It is discharged from a discharge port constituting the other end of 1b and administered to livestock.

As described above, according to the chemical liquid supply device according to the present embodiment, similarly to the chemical supply device according to the first embodiment, the chemical liquid supply device is administered to livestock in accordance with the flow rate of drinking water passing through the drinking water supply pipe 201. It is possible to automatically switch between drinking water and a medicine as liquids to be used. Therefore, even if the breeder does not constantly monitor the normal state of the livestock, if only a few livestock want drinking water, supply only drinking water, and if a large number of livestock want drinking water, supply a drug solution mixed with an aqueous drug solution to drinking water. can do.

Further, this medicine supply device is provided with a liquid amount sensor for detecting that the liquid amount of the medicine aqueous solution stored in the tank has become equal to or less than a predetermined amount, and the liquid amount sensor is provided in the tank. When it is detected that the amount of the chemical aqueous solution has become equal to or less than the predetermined amount, the operation of the pump is forcibly stopped even when the reed switch 203 is in the on state. As in the first embodiment,
It is possible to prevent the medicine in the medicine aqueous solution from drying due to contact with air and adhering to the inner surface of the connecting pipe, cylinder or the like.

[0031]

According to a first aspect of the present invention, there is provided a drug supply device capable of mixing a predetermined amount of a drug aqueous solution into drinking water passing through a drinking water supply pipe and supplying the drug solution mixed with the drug aqueous solution. In, a movable member that slides in the drinking water supply pipe in accordance with the flow rate of the drinking water, a strain sensor whose shape changes by sliding the movable member, and an electrical resistance that changes due to a shape change of the strain sensor,
When the detected resistance value is equal to or higher than a certain value, a pump for supplying the aqueous drug solution into the drinking water supply pipe from the tank in which the aqueous drug solution is stored via a connecting pipe is activated, and the predetermined value or more is used. And a control unit for adjusting the operation output of the pump in accordance with the change in the resistance value. Therefore, it is possible to supply a drug solution mixed with a drug aqueous solution with a simple structure. In addition, it is possible to supply a chemical solution at the timing when many livestock want water. Furthermore, it is possible to automatically adjust the mixing amount of the aqueous drug solution in accordance with the change in the flow rate of the drinking water passing through the drinking water supply pipe, and to always keep the dilution ratio of the aqueous drug solution to the drinking water constant.

According to the second aspect of the present invention, there is provided a drug supply device comprising:
In a drug solution supply device capable of mixing a predetermined amount of a drug aqueous solution with respect to drinking water passing through a drinking water supply pipe and supplying a drug solution mixed with the drug aqueous solution, a magnet that slides in the drinking water supply pipe corresponding to a flow rate of the drinking water. When the flow rate of the drinking water becomes a certain amount or more, the reed switch is arranged at a position where the magnet approaches or separates and is turned on or off by suction or repulsion by the magnet, and the reed switch is turned on. A pump that is activated by the operation to supply the aqueous drug solution from the tank storing the aqueous drug solution to the drinking water supply pipe via a connecting pipe. Therefore, it is possible to supply a drug solution mixed with a drug solution with a simple structure,
The drug solution can be supplied at the timing when many livestock want drinking water.

According to a third aspect of the present invention, there is provided a drug supply device comprising:
3. The chemical liquid supply device according to claim 1, further comprising: a liquid amount sensor configured to detect that a liquid amount of the aqueous drug solution stored in the tank is equal to or less than a predetermined amount, wherein the liquid amount sensor is provided in the tank. When the liquid amount of the chemical aqueous solution is detected to be equal to or less than a predetermined amount, the operation of the pump is forcibly stopped. Therefore, it is possible to further prevent the medicine in the medicine aqueous solution from drying due to contact with air and adhering to the inner surface of the cylinder constituting the connecting pipe or the pump.

[Brief description of the drawings]

FIG. 1 is a diagram showing a chemical solution supply device according to a first embodiment of the present invention.

FIG. 2 is a diagram for explaining an operation of a strain sensor included in the chemical liquid supply device according to the embodiment.

FIG. 3 is a diagram for explaining an operation of a liquid amount sensor constituting the chemical liquid supply device according to the embodiment.

FIG. 4 is a diagram showing an internal structure of a drinking water supply pipe constituting a drug solution supply device according to a second embodiment of the present invention.

FIG. 5 is a diagram showing an example of a conventional chemical liquid supply device.

FIG. 6 is a diagram showing an internal structure of a mixing valve constituting a conventional chemical solution supply device.

[Explanation of symbols]

 101, 201 Drinking water supply pipe 102 Connecting pipe 103 Tank 104 Pump 105 Movable member 106 Strain sensor 107 Control unit 108 Liquid volume sensor 109, 204 Holder 110 Liquid volume detection tube 111 Main power switch 202 Magnet 203 Reed switch

Claims (3)

[Claims] 1. A drug solution supply device capable of mixing a predetermined amount of a drug aqueous solution with drinking water passing through a drinking water supply pipe and supplying a drug solution mixed with the drug aqueous solution, wherein the drinking water supply is performed in accordance with the flow rate of the drinking water. A movable member that slides in the pipe, a strain sensor whose shape changes due to the sliding of the movable member, and an electrical resistance that changes due to the shape change of the strain sensor is detected, and when the detected resistance value exceeds a certain value To
A pump for supplying the aqueous drug solution from the tank in which the aqueous drug solution is stored to the drinking water supply pipe via the connecting pipe is started, and the operation output of the pump is adjusted in response to a change in the resistance value of a certain value or more. And a control unit that performs the control. 2. A drug solution supply device capable of mixing a predetermined amount of a drug aqueous solution with drinking water passing through a drinking water supply pipe and supplying a drug solution mixed with the drug solution, wherein the drinking water supply is performed in accordance with the flow rate of the drinking water. A magnet that slides in the pipe, and a reed switch that is arranged at a position where the magnet approaches or separates when the flow rate of the drinking water becomes a certain amount or more, and that is turned on or off by suction or repulsion by the magnet, It starts by the reed switch being turned on,
A pump for supplying the aqueous drug solution into the drinking water supply pipe via a connecting pipe from inside the tank in which the aqueous drug solution is stored,
A chemical solution supply device comprising: 3. The chemical liquid supply device according to claim 1, further comprising a liquid amount sensor for detecting that a liquid amount of the chemical aqueous solution stored in the tank has become equal to or less than a predetermined amount, and When the sensor detects that the amount of the chemical aqueous solution in the tank has become equal to or less than a certain amount, the operation of the pump is forcibly stopped.