JPH0737488Y2 - Liquid supply device for milking equipment - Google Patents

Description

[Detailed Description of the Invention] << Industrial Application Field >> This invention relates to a chemical liquid supply device for a milking device,
The present invention relates to a device for automatically measuring a certain amount of a liquid medicine such as a detergent and supplying it in a timely manner by using a negative pressure source included in a milking device.

<< Prior Art >> As a device shown in Fig. 6 as a device for automatically measuring and supplying a chemical liquid such as a detergent or a bactericide to a cleaning liquid tank for cleaning a pipeline of a milking device by using negative pressure. Devices are known. This type of device includes a negative pressure supply port 2 connected to a negative pressure source 1 and a chemical liquid intake port 4 connected to a chemical liquid tank 3.
And a chemical liquid supply port 6 communicating with the cleaning liquid tank 5 are provided, and the negative pressure supply port 2 is closed by the upward movement of the float 8 installed in the container 7, The chemical liquid supply port 6 is closed by the lower valve 9 due to the pressure difference between the internal pressure and the atmospheric pressure. When the negative pressure supply port 2 is communicated with the negative pressure source 1 by the switching valve 10, the inside of the container 7 becomes negative pressure, the chemical liquid supply port 6 is closed, and the chemical liquid is sucked into the container 7 from the chemical liquid tank 3. When the chemical solution reaches a predetermined level in the container 7, the float 8 that has moved upward moves into the negative pressure supply port 2
It is adsorbed on and is closed, and the inhalation of the drug solution is stopped. Then, after that, by opening the negative pressure supply port 2 to the atmosphere, the atmosphere is introduced into the container 7, the lower bubble 9 is opened by its own weight, and the chemical solution in the container is made to flow down to the cleaning tank 5.

<< Problems to be Solved by the Invention >> In the device having the above structure, the negative pressure supply port 2 is closed by the float 8 when the liquid level of the chemical liquid in the container 7 reaches a predetermined level, thereby measuring the chemical liquid. However, in the conventional apparatus, there is a problem that a large weighing error occurs when there is resistance to the movement of the float 8 or when the container 7 is mounted at an inclination. Further, the chemical liquid inlet 4 needs to be opened at the upper part of the container 7 in order to prevent the backflow of the chemical liquid due to the siphon phenomenon, but the chemical liquid falling from the suction port 4 causes the liquid surface in the container 7 to rise up and the float 8 There is a problem in that the timing of closing the negative pressure supply port 2 in order to move up and down is not constant, which causes a measurement error.

The present invention has been made with the object of increasing the accuracy of measuring the chemical liquid of this type of chemical liquid supply device.

<< Means for Solving the Problem >> In the device of the present invention, the container 7 is divided into a cylindrical upper container 12 and a lower container 13, and the float 8 is housed in the upper container 12 according to the measured value of the chemical liquid. The lower container 13 is replaced with a new one. The float 8 has a tubular shape with a cross section that leaves a slight gap 21 between it and the inner wall surface of the upper container 12, and a stopper 16 that supports the bottom of the float 8 is provided at the lower end of the upper container 12. Further, the chemical liquid suction port 4 is opened toward the inner wall surface of the upper container 12 and restricts the flow of the chemical liquid to be sucked.
33 are provided.

<Operation> The operation of the chemical liquid supply device of the present invention is similar to that of the conventional device, except that the float 8 uses the stopper 16 of the upper container for the lower container.
It is always held stably at the upper end of 13 and when the lower container 13 is full, the chemical solution flows into the narrow gap 21 between the upper container 12 and the float 8, so there is a slight difference in the amount of liquid above the float 8. Since the float 8 can be smoothly guided by the inner wall surface of the upper container 12, the measurement error can be made very small. Furthermore, since the chemical solution is squeezed by the squeezing section 33, it does not suddenly flow into the container 7,
Moreover, since the inflowing chemical liquid flows down along the inner wall surface of the upper container 12, the surface of the chemical liquid in the container is not disturbed, the movement of the float 8 is stable, and the measurement error due to the irregular movement of the float is also prevented. it can.

Although not directly contributing to the solution of the above problems, a small hole 29 for communicating the negative pressure supply port 2 with the atmosphere is provided on the negative pressure source 1 side from the closed position 28 of the negative pressure supply port 2 by the upper valve 25. This allows the upper valve 25 to be smoothly restored when the negative pressure supply port 2 is disconnected from the negative pressure source 1, and
By providing the small hole 30 which communicates with the atmosphere in the container 7 on the container 7 side from the closed position 28, the supply of the chemical liquid after the measurement becomes quick and the returning operation of the upper valve 25 becomes smooth.

<< Embodiment >> FIGS. 1 to 4 are views showing an embodiment of the present invention.

The measuring container 7 is a lower container that can be replaced with a cylindrical upper container 12.
13 and 13 are formed separately, and both are detachably connected by a screw portion 14. The relative position of the two is the lock nut 15
It is fixed by. As shown in FIG. 2, a bottom plate 17 on which a stopper 16 is projected is screwed to the lower end of the upper container 12, and the bottom plate is provided in the upper chamber 18 and the lower chamber inside the measuring container.
It is divided into 19 and. The upper chamber and the lower chamber are communicated with each other through a plurality of through holes 20 formed in the peripheral portion of the bottom plate 17.

The float 8 has a slight gap 21 between the inner wall surfaces of the upper container 12.
A guide piece 22 that is formed in a tubular shape that leaves
Thus, the upper chamber 18 can be smoothly moved in the vertical direction. A push-up rod 23 extending in the axial direction is fixedly mounted on the upper surface of the float, and the float 8 is supported with its bottom surface in contact with the stopper 16.

An arrow-shaped upper valve 25 is slidably mounted on the upper plate 24 of the upper container 12, and the base end of the upper valve extends into the upper chamber and faces the tip of the push-up rod 23. Upper container
A valve casing 26 is fitted on the upper surface of 12 and the negative pressure supply port 2 formed in the valve casing 26 faces the tip of the upper valve 25. The valve casing 26 is connected to the negative pressure hose 27. A valve seat 28 is provided at the negative pressure supply port 2.
Small holes that are attached to both sides of the valve seat and communicate with the atmosphere.
29 and 30 are formed. The negative pressure supply port 2 and the upper chamber 18 are communicated with each other by a through hole 31 formed along the upper valve 25.

Further, a drug solution suction pipe 32 penetrates through the upper plate 24 of the upper container, and the drug solution suction port 6 provided at the lower end thereof opens toward the inner wall surface of the upper container 12 and at the upper end of the drug solution suction pipe 32. Is the aperture
33 is open. Chemical hose connected to chemical tank
34 is connected to the chemical liquid suction pipe 32.

A chemical liquid supply port 6 is formed on the bottom plate 36 of the lower container 13, and a lower valve 9 shown in FIG. 4 is vertically movably attached to the chemical liquid supply port 6. A connector 38 is attached to the lower surface of the lower container 13 so as to cover the lower valve, and a discharge hose 39 is connected to the tip thereof.

Next, the operation of the device of the present invention will be described. The amount of liquid to be measured is determined by the volume of the lower container 13. When the measured values are different, the lower container 13 is replaced, or the screwing amount of the lower container 13 into the upper container 12 is changed to change the substantial volume of the lower container 13. When the negative pressure supply port 2 is communicated with the negative pressure source 1, the lower valve 9 is sucked by the negative pressure in the container 7 and moves upward to close the chemical liquid supply port 6. Then, due to the negative pressure in the container 7, the liquid medicine is sucked from the liquid medicine inlet 4.
At this time, the inflowing chemical liquid is throttled by the throttle portion 33 to limit the flow rate, and is guided so as to flow down along the inner wall surface of the container 7 at the chemical liquid inlet 4.

When the liquid level of the chemical liquid in the container 7 reaches the bottom of the float 8, the chemical liquid that flows in thereafter flows into the narrow gap 21 between the inner wall of the upper container 12 and the float 8. Therefore, the liquid surface of the chemical liquid rises sharply, the float 8 moves upward, and the upper valve 25
And the negative pressure supply port 2 is closed. At this time, the inside of the container 7 has a negative pressure due to the water head difference between the chemical liquid tank 3 and the chemical liquid inlet 4, the atmosphere is introduced from the small hole 30 on the container side, and the lower valve 9 moves downward due to its own weight. The chemical liquid supply port 6 is opened, the chemical liquid in the container gradually flows out, and the float 8 also moves downward.

When the negative pressure supply port 2 is disconnected from the negative pressure source 1 at a predetermined timing, the atmosphere is introduced into the negative pressure hose 27 through the small hole 29 on the negative pressure source side, and the adsorption of the upper valve 25 is eventually released. The negative pressure supply port 2 opens. After that, the atmosphere introduced from the small holes 29 and 30 is introduced into the container 7, so that the chemical liquid in the container flows down to the cleaning liquid tank 5 more quickly.

FIG. 5 is a diagram showing an example of an actual use mode of the device of the present invention. Cleaning of the pipeline of the milking apparatus is performed by using an alkaline detergent, an acidic detergent and a bactericide in order (not necessarily in this order). In the figure, 40a to 40c are chemical liquid supply devices of the present invention, 40a is for alkaline detergent, 40b is for acidic detergent, 40c is for sterilizing agent.Since the measured value of each chemical liquid is different, the size of the lower container 13 is Each is different. 3a is alkaline detergent tank, 3b is acidic detergent tank, 3c
Is a fungicide tank. Fresh water is supplied to the cleaning liquid tank 5 from a fresh water supply port 41, and each chemical liquid supply device 40a, 40b, 40
It is mixed with the chemical liquid supplied from c and sent to the pipeline to be washed by the pump 42. The negative pressure hoses 27a, 27b, 27c of each chemical liquid supply device are connected to the negative pressure pipe 44 via a solenoid valve 43. The solenoid valve 43 sequentially connects the negative pressure hoses 27a, 27b, 27c of each chemical liquid supply device to the negative pressure pipe 44 at a predetermined timing, and supplies an alkaline detergent, an acidic detergent and a bactericide to the cleaning fluid tank 5.

<Effect of device> As described above, in the chemical liquid supply device of the present invention, the float is formed into a tubular shape leaving a slight gap with the inner wall surface of the container, and the float is moved up and down largely with a slight liquid amount difference, Moreover, since the float is guided by the inner wall surface of the container, the operation of the upper valve is ensured and the measurement error is reduced. Further, since the chemical liquid supplied from the chemical liquid supply port is supplied in small amounts along the inner wall surface of the container, the surface of the chemical liquid is not ruffled and the upper valve does not malfunction. Further, if a small hole communicating with the atmosphere is provided in the vicinity of the closed position of the upper valve, the upper valve can be smoothly restored, and the chemical solution after metering can be promptly supplied.

[Brief description of drawings]

FIG. 1 is an overall cross-sectional view of the chemical liquid supply device of the present invention, FIG. 2 is an enlarged view of a connecting portion of a container, FIG. 3 is a cross-sectional view of an upper container,
FIG. 4 is a perspective view of a lower valve, FIG. 5 is a front view showing a usage example of the apparatus, and FIG. 6 is a sectional view showing a conventional apparatus. In the figure, 2: negative pressure supply port, 4: chemical liquid inlet, 6: chemical liquid supply port, 7: measuring container, 8: float, 9: lower valve, 12: upper container, 13: lower container, 16: stopper, 21: gap, 25: upper valve, 28: valve seat (closed position), 29: small hole (negative pressure source side), 30: small hole (container side), 33: throttle part

Claims (3)

[Scope of utility model registration request] 1. A container (7) provided with a negative pressure supply port (2), a chemical liquid intake port (4) and a chemical liquid supply port (6), and by the upward movement of a float (8) installed in the container. A liquid supply for a milking device, which includes an upper valve (25) for closing the negative pressure supply port (2) and a lower valve (9) for closing the liquid supply port (6) by a pressure difference between internal pressure and atmospheric pressure. In the apparatus, the container (7) is divided into a cylindrical upper container (12) and a replaceable lower container (13), and the float (8) is separated from the upper container (12) by a small gap (21). ) Is formed in a tubular shape, and a stopper (16) for supporting the bottom of the float (8) is provided at the lower end of the upper container (12), and the chemical solution inlet (4) is provided on the inner wall surface of the upper container. A squeezing portion (33) that is open toward the side and restricts the flow of the inhaled chemical liquid is provided. Liquid supply device for milk equipment. 2. A small hole (29) for communicating the negative pressure supply port (2) to the atmosphere on the negative pressure source (1) side from the closed position (28) of the upper valve (25) of the negative pressure supply port (2). Is provided,
The chemical supply device according to claim 1. 3. A small hole (30) communicating with the atmosphere in the container (7) is provided on the container (7) side of the closed position (28) of the negative pressure supply port (2) by the upper valve (25). The chemical liquid supply device according to claim 1 or 2.