JPH1182785A - Measuring distributing valve - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a single-pipe vacuum type measuring distributing valve, installed with a signal piston for occasionally of serve proper reciprocating action of a measurement piston housed inside the distributing valve a function for varying a working dimension of the measurement piston so as to regulate a discharge quantity is provided, and a working quantity of the signal piston can be fixed to the minimum without respect to the fluctuation of the working dimension of the measurement piston, as a measuring distributing valve which is provided with a vacuum responsive acting function so as to distribute pressurizedly supplied lubricant by means of a single element toward multiple positions to be lubricated in a machine. SOLUTION: A plug 12 is fitted in an opening part of a piston chamber 11, an adjusting piece 13 is screwed to the central part of the plug 12, and a signal piston 14 is arranged freely slidably in a shaft hole penetrating the shaft center of the adjusting piece 13. In the signal piston 14, torque by means of a torque means other than a spring, which acts on a measurement piston 10, is applied inward.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a single-tube depressurizing type dispensing system having a depressurizing response function for dispensing a fixed amount of lubricating oil supplied in a unified manner to a number of parts of a machine to be lubricated. About the valve.

[0002]

2. Description of the Related Art Japanese Patent Application No. 63-191573 (refer to FIGS. 7 and 8) relating to the invention of the present inventor is a prior art relating to a single-tube depressurization type dispensing valve to which the present invention belongs.
As can be seen from the content of the present invention, it is not easy to provide a signal pin for visually checking the operation state of the measuring piston in a configuration that can maintain satisfactory practicality. Furthermore, it can be said that it is even more difficult to implement a configuration in which a signal pin for visual observation is provided and the operation amount of the measuring piston is variable to enable adjustment of the discharge amount. The main reason for this is that, in terms of the use of the distribution valve, it must not only be small enough to be installed anywhere in a small space on the surface of a machine or equipment, but also must be simple in structure and inexpensive. And that the processing accuracy related to the structure must be precise.

[0003] For example, Japanese Patent Application No. 63-19157
3 (see FIGS. 7 and 8), based on the prior art in which the measuring piston and the signal pin are integrally configured or configured to operate integrally, and where the operating dimension of the measuring piston is configured to be variable. In addition, the space for attaching the distribution valve in the operation direction of the piston becomes extra large.

For example, the signal pin is configured to operate integrally with the measuring piston, and the outer end face of the adjusting piece and the tip of the signal pin are adjusted in a state where the operating stroke of the measuring piston is adjusted to be the maximum. When the length of the signal pin is determined so that the length of the signal pin coincides, that is, when the length of the signal pin is formed to be long in advance in accordance with the maximum discharge position of the adjustment piece, the signal pin is at its free position. Based on the outer end surface of the adjustment piece as a reference, the protrusion protrudes largely by a length corresponding to the actual working dimension up to the operation stop position of the measuring piston. As a result, a protruding state having a large dimension obtained by adding the operating dimension of the measuring piston to the in-and-out dimension of the adjusting piece occurs, and an extra space of 5 mm or more is required at least in a place where a machine or an apparatus is installed, according to experience.

As described above, conventionally, in a metering / dispensing valve having a function of varying the discharge amount as in the present invention, the provision of a signal pin for visually observing the operation of the valve is ideal and needs are large. Was considered difficult to materialize.

[0006]

SUMMARY OF THE INVENTION The present invention relates to a single-pipe depressurizing type dispensing valve, in which a signal pin for visually checking whether or not a repetition mechanism of a built-in measuring piston is functioning properly is provided. A structure capable of adjusting the discharge amount by varying the operation size of the measuring piston, and further enabling the operation size of the signal pin to be required and minimized despite the change in the operation size of the measuring piston. For example, it is an object of the present invention to provide a single-tube depressurization type dispensing valve whose movement can be set to a fixed size of 3 to 5 mm.

[0007]

A plug (12) is fitted into the mouth of the piston chamber (11), and an adjust piece (13) is screwed into the center of the plug to form a shaft of the adjust piece. A signal pin (14) formed separately from the piston is slidably mounted in the shaft hole that penetrates the heart,
The signal pin is configured so that torque by a torque means (16) different from the spring (15) acting on the measuring piston (10) acts inward. The signal pin is provided with a means for limiting the axial movement to a certain range based on the adjustment piece.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS A metering / dispensing valve to which the present invention belongs is a unit distributing valve capable of metering / dispensing by generating alternating control of pressurization and depressurization in a main pipe for supplying a fluid such as lubricating oil. About. Then, in order to put the distribution function to practical use, a plurality of ports of the unit distribution valve are assembled to one main pipe. FIG. 1 shows an embodiment of a distribution valve of the type in which the three ports are assembled.

According to the present invention, there is provided an inflow port (10) for allowing a pressurized fluid to flow from a main pipe passage (4) in a main body (1).
1) near the discharge port (102) and the main pipe passage;
A control mechanism (3) including a check valve (103) provided between the inflow port and the discharge port, and a measurement mechanism (2) having a measurement piston (10) and a piston chamber (11). A unit distribution valve having a through hole (9) communicating the piston chamber with an intermediate position between the inflow port and the discharge port, and the back of the piston and the mouth of the machined piston chamber (11). A plug (12) for closing the piston chamber, and an adjusting piece (13) which can be screwed along the axis of the plug at the center of the plug.
A signal pin (14) is slidably provided at the axis of the adjust piece, and a pressure accumulating spring (15) for applying a torque toward the bottom of the piston chamber to the measuring piston is provided. The signal pin is embodied by providing a torque means (16) different from the pressure accumulating spring. The signal pin (14) is configured such that the amount of movement of the adjust piece (13) in the operating direction is limited.

[0010]

Since the present invention has the above-described form and function, if the supply fluid on the main pipe side is pressurized, the discharge port (102) is actuated by the action of the umbrella valve (103) of the control mechanism (3). Is closed and the fluid guided by the through hole (9) communicating the inflow port (101) and the metering mechanism (2) is pumped to the piston chamber (11), and the metering piston (10) is fed by the pumped supply. Operates by fluid pressure. Therefore, the fluid of the volume of the piston chamber (11) expanded by the operation of the measuring piston is stored. On the other hand, the fluid once supplied is accumulated under the action of a pressure accumulation spring (15) provided inside the back of the measuring piston (10). As a result, by depressurizing the fluid pressure on the main pipe side (4), in the control mechanism (3), between the inflow port (101) side sandwiching the umbrella type valve (103) and the discharge port (102) side. A pressure difference opposite to that at the time of fluid supply occurs. Due to this pressure difference, the umbrella type valve (1
03) closes the inflow port (101) and opens the discharge port (102) to produce a discharge action.

During operation of the metering piston (10), the signal pin (14) operates with a limited operating stroke at the end of operation of the metering piston, with a defined length of its tip. The distribution valve protrudes from the contour of the distribution valve, that is, from the end face of the adjustment piece (13).
The present invention confirms that the distribution valve has been properly operated by visually observing the protruding state of the signal pin.

According to the present invention, since the adjusting piece (13) has a function of adjusting the movement of the adjusting piece by screwing in and out, the operating dimension of the measuring piston (10) can be adjusted by this adjustment. The discharge amount / distribution amount can be arbitrarily adjusted.

[0013]

Embodiments will be described below. FIG. 1 is an embodiment in which three unit distribution valves of the present invention are assembled, and is a plan view in which a part (one opening of the unit distribution valve) is cut away.

FIG. 2 is a longitudinal sectional view taken along the line X in FIG.
FIG. 3 shows the state after adjusting the working dimension of the piston to be large, and FIG. 4 shows the working stroke in order, showing changes in the positions of the metering piston and the signal pin. FIG. 5 shows a second embodiment, and FIG. 6 is an explanatory view of the operation according to the configuration of the second embodiment, and particularly shows the characteristics of the operation stroke and operation of the torque means for returning the signal pin.

In the embodiment, a weighing mechanism 2 and a control mechanism 3 are formed in the main body 1. A main pipe passage 4 is arranged upstream of the control mechanism.

The metering mechanism 2 closes the piston chamber, a piston chamber 11 for accommodating the piston, and the back of the metering piston, that is, the mouth of the machined bottomed piston chamber 11. , An adjust piece 13 provided at the center of the plug so as to be screwable along the axis of the plug, and slidably mounted on the axis of the adjust piece. A signal pin 14, a pressure accumulating spring 15 for applying a torque toward the bottom of the piston chamber to the measuring piston, and a different torque from the pressure accumulating spring for applying a torque toward the bottom of the piston chamber to the signal pin. It is constituted by means 16.

The control mechanism 3 is configured in contact with the main pipe passage 4, has a discharge port 102 provided near the downstream side of the inflow port 101, and has a valve storage chamber provided between the inflow port and the discharge port. A flexible umbrella valve 103 is provided, and the elasticity of the coil spring acts on the upstream side of the umbrella valve in such a direction as to press the umbrella valve against the discharge port side. In addition, the umbrella type valve 10
Reference numeral 3 designates a flexible portion of the peripheral portion which prevents backflow of the fluid toward the upstream side, that is, the inlet side, and the inlet 10.
1 to allow the inflow of fluid.

[0018]

Embodiment 1 In the first embodiment shown in FIGS.
The piston chamber 11 is formed by fitting a sleeve 11a. A measuring piston 10 is slidably provided inside the piston chamber 11. An oil seal 10a is mounted on the tip of the measuring piston, and an O-ring 10b is mounted on the middle of the measuring piston. In addition,
A signal pin 1 described later is provided on the back end face side of the measuring piston.
4 forms a convenient seating surface for the inner tip to abut.

A plug 12 is fitted to a rear portion of the piston chamber 11 in a state where the piston chamber is closed, and an adjust piece 13 is screwed to a shaft center of the plug. The adjust piece has a knob for screwing at the lower end in the figure and a screw at the top. The adjust piece 13 is connected to the plug 1 by the above configuration.
2. Screw in and out based on 2. The tip portion of the adjust piece 13 extends to the back of the piston chamber 11 and abuts directly on the back surface of the metering piston 10 or indirectly via another mounting component. A spring accommodating chamber 13a is formed at the distal end of the adjust piece 13 and has a coil spring 16a for returning the signal pin 14 to its original state.

In this embodiment, the signal pin 14 is
Provide a different diameter part formed by making the tip of the protruding side one step larger,
Further, a spring seat 14a for the coil spring 16a is formed at an inner end of the piston chamber. As an example of the spring seat forming means, an embodiment is shown in which a washer component fitted to the tip of the signal pin 14 is fixed by an E-ring. With this configuration, the adjustment piece 1 is provided between the spring seat 14a and the plane perpendicular to the axis formed in the different diameter portion.
3, the operation amount N (or N ′) of the signal pin 14 with respect to the adjustment piece 13 is limited.

In this embodiment, when the pressurized fluid is supplied, the metering piston 10 is first activated (FIG. 4A), and the back surface of the metering piston comes into contact with the tip of the signal pin 14 soon. From this contact state, the metering piston 10 operates as shown in FIG. As a result, the signal pin 14 operates and stops until the formed spring seat 14a comes into contact with the adjustment piece 13. In this state, the supply fluid is stored in the expanded piston chamber 11. On the other hand, the signal pin 14
Is in a state of protruding from the end face of the adjustment piece 13. That is, it indicates a state in which the measuring piston is operated inside.

When the main pipe side is depressurized, the umbrella valve 103 of the control mechanism 3 closes the inflow port 101 and releases the discharge port 102 as shown in FIG. 4C. The fluid stored on the side is discharged from the discharge port 102, and one operation is completed. In addition,
After the end of the operation, both the weighing mechanism 2 and the control mechanism 3 return to the original state shown in FIGS. 2 and 3 to prepare for the operation again.

[0023]

Embodiment 2 Hereinafter, features different from Embodiment 1 will be described based on a second embodiment shown in FIGS. In this embodiment, attention should be paid to the deformed structure of the torque means for returning the signal pin 14 to the original state.

In this embodiment, permanent magnets (16b, 16c) are used as torque means. Permanent magnet 16
b is fixedly provided on the back of the metering piston 10 which engages with the signal pin 14 and acts to attract the magnetic force responsive material provided at the signal pin 14 or at the tip of the signal pin.

The adjustment piece 13 is
The knob is formed on the outside of the inside of the counterbored hole for accommodating the odd-shaped portion of the signal pin 14 so as to suck the odd-shaped portion of the signal pin.

The operation in this embodiment is performed in the order shown in FIG. 6 with the origin in FIG. When the pressurized fluid is supplied, the metering piston 10 operates. After the back end surface of the measuring piston comes into contact with the tip of the signal pin 14, the measuring piston 10 pushes down the signal pin 14 against the attraction force of the permanent magnet 16c provided on the adjustment piece 13, and pushes the signal pin down. (FIG. 6b). Note that the signal pin 1 in this projecting stroke is
The tip 4 is held by being attracted to a permanent magnet provided on the measuring piston 10 side.

When the main pipe passage is depressurized, the measuring piston 10 returns to the original state (FIG. 5). In this return stroke, in a state where the signal pin 14 is attracted to the measuring piston, the measuring piston 10
Pull in 4. Then, after the deformed portion of the signal pin abuts on the permanent magnet 16c, the signal pin 14 is held by the permanent magnet, while the attraction relationship between the permanent magnet on the measuring piston 10 side and the signal pin 14 is released, Only the metering piston 10 returns to the bottom of the piston chamber 11, that is, to its original state.

[0028]

The metering / dispensing valve of the present invention has the following effects since it is constructed as described above.

As a result of configuring the signal pin to operate only at the end of operation of the metering piston, its movement is kept to a minimum. Therefore, even when the movement of the measuring piston is set to be large, the protrusion size of the signal pin can be kept constant on the basis of the adjustment piece. The signal pin is held by the adjustment piece including its longitudinal movement, and since a large load does not act on the main part of the structure, the diameter and length of the signal pin can be set to the minimum. There are advantages.

Since the above advantages are clear, there is an effect that the apparatus can be implemented as an extremely compact apparatus. As a result, there is an effect that a distribution valve excellent in versatility that can be attached to a small space of a machine or an apparatus and utilized can be provided.

[0031]

[Brief description of the drawings]

FIG. 1 is a plan view in which a part of the present invention is cut.

FIG. 2 is a longitudinal sectional view of the present invention taken along line X in FIG.

FIG. 3 is a longitudinal sectional view similar to FIG. 2 in which the discharge amount is adjusted to an increased state.

FIG. 4 is a set of longitudinal sectional views similar to FIG. 2 showing the operating state of the present invention.

FIG. 5 is a longitudinal sectional view similar to FIG. 2, showing a second embodiment.

FIG. 6 is a set of longitudinal sectional views similar to FIG. 4, showing the operation of the second embodiment.

FIG. 7 is a sectional view of a main part similar to FIG. 2 of the prior art.

8 is a sectional view of a main part similar to FIG. 2 of the prior art. In the figure, 1 is a main body of an embodiment of the present invention 2 is a weighing mechanism 3 is a control mechanism 4 is a main pipe. Passage 9: passage connecting the control passage and the measuring mechanism 10: measuring piston 11: piston chamber 11a, sleeve 12: plug 13: adjusting piece 14: signal pin 14a・ Spring seat 15 ・ ・ ・ Pressure accumulating spring 16a ・ ・ Coil spring

Claims (1)

[Claims] 1. A metering / dispensing valve having a metering piston and a piston chamber, wherein a plug is fitted into an opening of the piston chamber holding the metering piston, and an adjust piece is screwed into a center of the plug. A signal pin (14) formed separately from the measuring piston is slidably provided in a shaft hole passing through the shaft center portion of the adjust piece, and the signal pin is provided separately from a spring acting on the measuring piston. A metering / dispensing valve structure characterized in that the torque by the torque means acts inward.