JP5473395B2 - Liquid transfer device - Google Patents

Description

  The present invention belongs to a technical field related to a liquid transfer device that allows a liquid to be freely used in devices such as a machine tool and a food processing machine that use a liquid such as a lubricating oil and a cleaning liquid.

  In equipment using liquid, the liquid is stored in a liquid storage tank having a certain volume. The liquid stored in the liquid storage tank is set so as to be supplied only to a necessary portion only at the time of the original work or processing of the equipment by the connected supply driving unit. Therefore, it is impossible to temporarily use the liquid stored in the liquid storage tank at an arbitrary place in the equipment. However, it is very convenient if the liquid stored in the liquid storage tank can be used for maintenance and cleaning of the equipment. For this reason, there is a demand for the development of a technology that allows the liquid stored in the liquid storage tank of the equipment to be used freely.

  Conventionally, for example, a technique described in Patent Document 1 is known as a technique directed to making it possible to freely use liquid stored in a liquid storage tank of equipment.

  Patent Document 1 describes a liquid transfer device in which a pressurizer is connected to a liquid storage tank, and the liquid stored in the liquid storage tank is pressurized by the pressurizer and supplied to the outside.

  In the liquid transfer device according to Patent Document 1, the liquid storage tank functions as a pressurizing tank.

Utility Model Registration No. 3120282

  In the liquid transfer device according to Patent Document 1, since the liquid storage tank cannot be implemented when it does not have pressure resistance and hermeticity capable of functioning as a pressurizing tank, there is a problem that its usefulness is low. .

  In recent years, devices using liquids are often provided with a pressurized air supply system for driving valves and cylinders. Therefore, in the development of the present invention, the tendency that this equipment is equipped with a pressurized air supply system was considered.

  The present invention has been made in consideration of such problems and trends, so that the liquid can be freely used in equipment such as machine tools and food processing machines that use liquids such as lubricating oil and cleaning liquid. It is an object of the present invention to provide a compact liquid transfer device.

  In order to solve the above-described problems, the liquid transfer apparatus according to the present invention employs means described in each of the claims.

That is, according to the first aspect of the present invention, it is used in equipment including a liquid storage tank for storing liquid and a pressurized air supply system for supplying pressurized air, and is stored in the liquid storage tank. A pressurizing tank to be submerged in the liquid, an inlet to be attached to the pressurizing tank and the liquid to be introduced into the pressurizing tank, and a liquid to be attached to the pressurizing tank and contained in the pressurizing tank. A discharge port that discharges to the outside, a check valve that is connected to the introduction port and is opened when liquid is introduced into the pressurization tank and is closed when the liquid is discharged, and discharge of liquid from the pressurization tank is connected intermittently The operation valve is connected to the pressurization tank and can be connected to the pressurized air supply system. When liquid is introduced from the introduction port, the air inside the pressurization tank is allowed to be discharged and the discharge port Pressurizing tank for discharging liquid from And a switching valve mechanism that allows the pressurized air from the pressurized air supply system to be sent into the inside of the valve.The operation valve is connected to the discharge port by a hose and is gripped with one hand and pulled with a finger. When the gold is pulled, it consists of a nozzle gun that opens the valve and injects liquid from the nozzle, and the hose connecting the switching valve mechanism and the pressurized air supply system is pressurized by a single foot operation from the pressurized air supply system. The check pedal is connected to a spring material for opening the check valve and the check valve in response to the pressurized air from the pressurized air supply system. And a link portion that closes against the material, and that is slidably accommodated in the cylinder provided in the pressurization tank and operates in response to the pressurized air from the pressurized air supply system. And a piston for pressurization. Characterized in that a ball to be allowed provided that the air in the open by pressurization tank during introduction of the liquid is discharged to the switching valve mechanism, assist mechanism is assisting the opening and closing operations is attached for click And

In this means, each part is connected to or attached to the pressurizing tank, the pressurizing tank is inserted into the liquid storage tank of the equipment, and the pressurized air supply system of the equipment is connected to the switching valve mechanism. The liquid stored in the pressurizing tank can be pressurized and discharged with pressurized air from a pressurized air supply system. Further, an operation valve composed of a nozzle gun operated with one hand and a foot pedal operated with one foot are provided. In addition, the opening and closing operation of the check valve is assisted by adding an assist mechanism to the check valve, and the assist mechanism includes a spring material and a link portion, so that the assist mechanism is configured with a simple mechanical mechanism, Since the assist mechanism includes a cylinder, a piston, and a ball, a basic structure of fluid pressure response is adopted as the assist mechanism.

  According to a second aspect of the present invention, in the liquid transfer device of the first aspect, the switching valve mechanism is connected to an upper portion of a connection pipe raised from the pressurizing tank.

  In this means, the switching valve mechanism is connected to the upper part of the connection pipe, so that the switching valve mechanism is supported at a position higher than the liquid stored in the liquid storage tank by the rising length of the connection pipe.

In the liquid transfer device according to the present invention, each part is connected to or attached to the pressurization tank, the pressurization tank is introduced into the liquid storage tank of the equipment, and the pressurized air supply system of the equipment is connected to the switching valve mechanism. Since the liquid contained in the pressurizing tank can be pressurized and discharged with the pressurized air from the pressurized air supply system, it can be made compact. There is an effect that the liquid can be freely used in equipment such as machine tools and food processing machines that use liquids such as lubricating oil and cleaning liquid. In addition, since an operation valve composed of a nozzle gun operated with one hand and a foot pedal operated with one foot are provided, there is an effect that it can be operated with one hand and one foot. In addition, since an assist mechanism is attached to the check valve, the opening and closing operation of the check valve is assisted, so there is an effect that the check valve is reliably opened and closed. Since the assist mechanism is composed of a simple mechanical mechanism, the structure of the assist mechanism can be prevented from becoming complicated. The assist mechanism includes a cylinder, a piston, and a ball. Since the basic structure of pressure response is adopted, there is an effect of reliably responding to the pressurized air from the pressurized air supply system of the equipment.

  Furthermore, as claimed in claim 2, the switching valve mechanism is connected to the upper portion of the connection pipe, so that the switching valve mechanism is supported at a higher position than the liquid stored in the liquid storage tank by the rising length of the connection pipe. Therefore, there is an effect that it becomes unnecessary to provide the switching valve mechanism with a waterproof structure.

It is a side view of the form for implementing the liquid transfer apparatus which concerns on this invention. It is a distribution circuit diagram of the principal part of FIG. It is an expanded sectional view of the principal part of FIG. FIG. 4 is another operation diagram of FIG. 3. FIG. 5 is another operation diagram of FIGS. 3 and 4.

  Hereinafter, embodiments for implementing a liquid transfer device according to the present invention will be described with reference to the drawings.

  In this form, the type operated with one hand and one foot is shown.

  In this embodiment, as shown in FIG. 1, a machine tool including a liquid storage tank T for storing a liquid W such as a lubricating oil and a cleaning liquid, and a pressurized air supply system G for supplying pressurized air A. , Used in equipment such as food processing machines. The pressurizing tank 1, the introduction port 2, the discharge port 3, the check valve 4, the operation valve 5, the switching valve mechanism 6, and the assist mechanism 7 are configured as main parts.

The pressurizing tank 1 contains the liquid W inside and pressurizes it, and is higher than 4 to 10 kgf / cm ² which is a general supply pressure of the pressurized air supply system G by a metal material, a synthetic resin material or the like. It is formed in a hollow body with pressure resistance. Preferably, the liquid storage tank T is formed in a shape that can be placed without falling over. A strainer 8 made of stainless mesh or the like is attached to one side end of the pressurizing tank 1.

  The introduction port 2 introduces the liquid W into the pressurizing tank 1 and is opened at the lower part of the side end portion of the pressurizing tank 1 on the side where the strainer 8 is attached.

  The discharge port 3 discharges the liquid W stored in the inside of the pressurizing tank 1 to the outside, and is opened at the lower portion of the side end portion on the opposite side to the side where the strainer 8 of the pressurizing tank 1 is attached. ing.

  The check valve 4 is opened when the liquid W is introduced into the pressurizing tank 1 and is closed when the liquid W is discharged, and a plate-like valve body 4b is formed with the introduction port 2 formed in a cylindrical shape as a valve seat 4a. It is connected to the introduction port 2 so that it can be opened and closed. The valve body 4b is rotatably supported by a support seat 4c fixed to the inner surface of the pressurizing tank 1, and opens and closes an end face on the inner side of the pressurizing tank 1 at the inlet 2 which is the valve seat 4a.

  The operation valve 5 intermittently discharges the liquid W from the pressurizing tank 1 and is configured as a nozzle gun connected to the tip of a hose 9 connected to the discharge port 3. In the nozzle gun, when the grip 5a is grasped with one hand and the trigger 5b is pulled with a finger, the valve 5c is opened and the liquid W is ejected from the nozzle 5d.

  The switching valve mechanism 6 is connected to the upper part of the connection pipe 10 raised from the upper part of the pressurizing tank 1, connected to the pressurized air supply system G, and added when the liquid W is introduced from the inlet 2. The air a inside the pressure tank 1 is allowed to be discharged, and when the liquid W is discharged from the discharge port 3, the pressurized air A from the pressurized air supply system G is inside the pressure tank 1. It is allowed to be sent. That is, as shown in detail in FIG. 2, a rapid operation type shuttle valve 6a, one of which is opened at atmospheric pressure, is connected to the connection pipe 10 to form a three-way path. Control valves 6b and 6c are connected. The flow rate control valve 6b connected to the side opened by the atmospheric pressure of the shuttle valve 6a is opened to the atmosphere as it is. The flow control valve 6c connected to the side of the shuttle valve 6a that is closed at atmospheric pressure is connected to the terminal of the pressurized air supply system G by the hose 11. A regulator 12 and a foot pedal 13 are connected to the hose 11 from the pressurized air supply system G side. The regulator 12 regulates the pressurized air A supplied from the pressurized air supply system G. The foot pedal 13 intermittently supplies the pressurized air A from the pressurized air supply system G by stepping on one foot. When the supply of the pressurized air A is cut off, the foot pedal 13 remains on the downstream side. The structure eliminates pressure.

  The assist mechanism 7 assists the opening / closing operation of the check valve 4, and is composed mainly of a spring material 7a, a link portion 7b, a cylinder 7c, and a piston 7d. The spring material 7 a opens the check valve 4, and is stretched between the support base 7 e fixed to the inner surface of the pressurizing tank 1 and the valve body 4 b of the check valve 4. It consists of a coil spring that is urged to press open the valve body 4b). The link portion 7 b mainly closes the check valve 4, and a link plate 7 bb with a long hole 7 ba that is rotatably supported by the valve body 4 b of the check valve 4, and a tip portion into the long hole 7 ba. The slide plate 7bc is slidably connected to the support base 7e so as to be slidably supported. The cylinder 7c slidably accommodates the piston 7d, and is provided so as to protrude above the pressurizing tank 1 on the extension line of the slide plate 7bc of the link portion 7b, and is a connecting portion to the pressurizing tank 1. An expanded portion 7f that is expanded downward is formed at the lower end portion. A connecting pipe 10 is connected to the cylinder 7c by a nut 14 at the upper end portion, and the inside is communicated. The piston 7d operates the link portion 7b in response to the pressurized air A from the pressurized air supply system G, and an O-ring 7da that is in pressure contact with the cylinder 7c on the outer peripheral surface of the substantially central portion in the axial direction. Is attached, an upper air discharge passage 7db is provided at the center of the upper half portion via the O-ring 7da, an air supply passage 7dc is provided at the side portion, and a lower-side air is provided at the lower half portion via the O-ring 7da. A discharge path 7de is provided, and a discharge communication path 7df that connects the upper side air discharge path 7db and the lower side air discharge path 7de is provided at the center around the O-ring 7da. A slide plate 7bc of the link portion 7b is fixed to the lower end portion of the piston 7d. A ball 7g such as a synthetic tree material having a low specific gravity for opening and closing the discharge communication passage 7df is accommodated in the upper air discharge passage 7db of the piston 7d. The lower air discharge path 7de of the piston 7d accommodates a ball 7h such as a synthetic tree material having a low specific gravity for opening and closing the discharge communication path 7bf. The ball 7h is preferably formed of a foamable synthetic resin material or the like that is lighter than the ball 7g (floating on the liquid W). A coil spring 7i is provided between the piston 7d and the support base 7e to repress the piston 7d to the top dead center.

  In order to use this configuration, the pressurizing tank 1 is put into the liquid storage tank T as shown in FIG.

  The pressurizing tank 1 charged in the liquid storage tank T is placed on the bottom surface of the liquid storage tank T and submerged in the liquid W. However, the connection pipe 10 extending upwardly connects the switching valve mechanism 6 to the liquid W. Support at a high position. Therefore, it becomes unnecessary to provide the switching valve mechanism 6 with a waterproof structure.

  The pressure tank 1 submerged in the liquid W has the check valve 4 opened by the spring material 7 a of the assist mechanism 7, and the inside is opened to the atmosphere by the shuttle valve 6 a of the switching valve mechanism 6. Accordingly, the liquid W is introduced from the inlet 2 into the pressurizing tank 1. At this time, as shown in FIG. 3, with the introduction of the liquid W into the inside of the pressurizing tank 1, the air a inside the pressurizing tank 1 flows from the lower side air discharge path 7de of the piston 7d of the assist mechanism 7. The ball 7g is pushed up through the discharge communication passage 7df and discharged to the upper air discharge passage 7db. The air a discharged to the upper air discharge path 7db of the piston 7d is released to the atmosphere through the connecting pipe 10 and the switching valve mechanism 6 that are in communication. At this time, since the air a passes through the flow rate control valve 6b by the switching valve mechanism 6, it is atomized when the liquid W mixed in and discharged from the air a attached around the piston 7d is released to the atmosphere. Absent.

  When the liquid W fills the inside of the pressurizing tank 1, as shown in FIG. 4, the ball 7h on the lower side of the assist mechanism 7 rises together with the liquid W and closes the discharge communication path 7df of the piston 7d. Therefore, the liquid W does not leak from the piston 7d of the assist mechanism 7 to the connection pipe 10 side.

  Further, as shown in FIG. 1, the hose 11 is connected to the pressurized air supply system G.

  When the foot pedal 13 is depressed with the liquid W filled in the pressurizing tank 1, the pressurized air A supplied from the pressurized air supply system G is regulated by the regulator 12 and the flow rate of the switching valve mechanism 6. The flow rate is adjusted by the control valves 6 b and 6 c to switch the shuttle valve 6 a and enter the connection pipe 10.

  As shown in FIG. 5, the pressurized air A that has entered the connection pipe 10 closes the ball 7g on the upper side of the assist mechanism 7 by pressing against the discharge communication passage 7df of the piston 7d, and lowers the piston 7d. Then, when the O-ring 7da of the piston 7d of the assist mechanism 7 reaches the expanded portion 7f, the air supply path 7dc of the piston 7d and the inside of the pressurizing tank 1 are communicated with each other. As a result, the liquid W stored in the pressurizing tank 1 is pressurized by the pressurized air A supplied from the pressurized air supply system G.

  Thereafter, if the operation valve 5 is operated, the maintenance and cleaning of the devices can be performed by injecting the liquid W even if the devices to be used are not operating.

  When the liquid W stored in the pressurizing tank 1 is exhausted, the operation of injecting the liquid W of the operation valve 5 is stopped, and the foot pedal 13 is released to return to the state shown in FIG. The

  According to this embodiment, each part is connected to or attached to the pressurizing tank 1, the pressurizing tank 1 is introduced into the liquid storage tank T of the equipment, and the pressurized air supply system of the equipment is supplied to the switching valve mechanism 6. Since it can be used simply by connecting G, the whole is compact and easy to handle. Further, since the liquid stored in the pressurizing tank 1 can be pressurized and discharged with the pressurized air A from the pressurized air supply system G, the liquid W such as lubricating oil or cleaning liquid is used. The liquid W can be freely used by devices such as machine tools and food processing machines.

  As described above, the shuttle valve 6a of the switching valve mechanism 6 can be a three-way solenoid valve in addition to the illustrated embodiment.

  In addition to machine tools and food processing machines, the liquid transfer device according to the present invention can be used in a wide range of equipment including a liquid storage tank for storing liquid and a pressurized air supply system for supplying pressurized air. Can be used.

DESCRIPTION OF SYMBOLS 1 Pressurization tank 2 Introduction port 3 Discharge port 4 Check valve 5 Operation valve 6 Switching valve mechanism 7 Assist mechanism 7a Spring material 7b Link part 7c Cylinder 7d Piston 10 Connection pipe a Air (discharged)
A Air (Pressurized)
G Pressurized air supply system T Liquid storage tank W Liquid

Claims (2)

A liquid storage tank that stores liquid and a pressurized air supply system that supplies pressurized air, and is used in devices that are submerged in the liquid stored in the liquid storage tank. A pressure tank, an introduction port that is attached to the pressurization tank and into which the liquid is introduced into the pressurization tank, and a discharge port that is attached to the pressurization tank and discharges the liquid contained in the pressurization tank to the outside A check valve that is connected to the inlet and opened when liquid is introduced into the pressurizing tank and is closed when the liquid is discharged; an operation valve that is connected to the outlet and intermittently discharges the liquid from the pressurizing tank; When connected to a tank and connected to a pressurized air supply system, the liquid inside the pressurizing tank is allowed to be discharged when the liquid is introduced from the inlet, and the liquid is discharged from the outlet. Supply pressurized air inside the pressurization tank A switching valve mechanism that allows pressurized air from the system to be sent in. The operation valve is connected to the discharge port with a hose, and the valve is opened when the grip is pulled with one hand and the trigger is pulled with a finger. And a nozzle gun that ejects liquid from the nozzle, and intermittently supplies pressurized air from the pressurized air supply system by stepping on one foot to a hose that connects the switching valve mechanism and the pressurized air supply system. A foot pedal is connected, and the check valve closes the spring material that opens the check valve and the check valve in response to the pressurized air from the pressurized air supply system against the spring material. And a cylinder provided in the pressurizing tank, and a piston that is slidably accommodated in the cylinder and operates the link portion in response to pressurized air from a pressurized air supply system. Piston has a liquid guide to the pressurizing tank. Sometimes the air inside the opened by pressurization tank is balls allowed provided from being discharged to the switching valve mechanism, the liquid transfer apparatus characterized by assist mechanism is assisting the opening and closing operations is attached .   2. The liquid transfer device according to claim 1, wherein the switching valve mechanism is connected to an upper portion of a connection pipe raised from the pressurizing tank.

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