JPH0334557Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a lubricator for mixing lubricating oil into air supplied to pneumatic equipment such as pneumatic cylinders and control valves.

[Conventional technology]

The general structure of a lubricator is that a body with an air flow passage formed in a substantially horizontal direction is attached to the upper surface of an oil tank, and an orifice that protrudes into the air flow passage is attached to a substrate attached to the lower surface of the air flow passage. erecting a columnar body, and installing a flow guide on the upstream side of the columnar body having a through hole that matches the orifice, and having adjusting plates made of an elastic material protruding from both sides of the body for adjusting the flow rate; The oil sucked up due to the pressure difference between the oil tank and the orifice is mixed into the air flowing through the orifice.

In a lubricator with such a structure, there is a gap between the body and the adjustment plate of the flow guide, so when the air flow rate from the inlet becomes small, air leaks through this gap and the flow guide hole is closed. Since the amount of air passing through is extremely small, oil drips insufficiently, causing pneumatic equipment to operate unsmoothly or malfunction.

[Problem that the invention attempts to solve]

The problem to be solved by the present invention is to ensure that oil is mixed into the air even if the air flow rate from the inlet is small.

[Means for solving problems]

As a means to solve the above problems, the lubricator of the present invention is provided with a convex portion in the air flow passage of the body at a position where the adjustment plate of the flow guide is curved downstream, and the lubricator of the present invention The structure eliminates the gap between the air conditioner and the adjustment plate to reduce air leakage.

[Effect]

The small amount of air that has flowed into the air flow passage is blocked by both adjustment plates of the flow guide, which are curved downstream by the convex part of the body, and because there is no gap between the body and the adjustment plates, it flows through the through hole and flows into the oil tank. Due to the pressure difference between the oil tank and the orifice, the oil in the oil tank is sucked up to the top of the drip tube, drips into the drip tube from the drip hole on the top, is supplied to the orifice from the supply hole, and is mixed into the air. ing.

〔Example〕

An embodiment of the present invention will be described with reference to the drawings.
FIG. 1 shows a sectional view of a lubricator according to the present invention, in which a body 2 in which a horizontal air flow passage 3 is formed is attached to the upper surface of an oil tank 1, and the length direction of the air flow passage 3 of this body 2 is A mounting opening 4 is transparently provided at a position corresponding to the lower surface of the approximately central part of the frame, and a rectangular column 1 having a circular upper end is provided on the lower surface side of the mounting opening 4.
A base plate 11 with a base plate 12 standing upright at the center of the upper surface is applied and fixed with screws, and the column 12 vertically passes through the air flow passage 3, and the circular part at the upper end is fitted into the upper surface of the body. An orifice 13 is formed along the flow direction at a position corresponding to the center of the air flow path 3 of this column 12, and a supply that reaches the orifice 13 is formed on the upper end surface of the column 12. A hole 14 is formed, and a flow guide 21 is attached to the upstream side of the columnar body 12 to guide the air flowing through the air flow passage 3 to the orifice 13. Due to the pressure difference, the oil in the oil tank 1 is sucked up to the upper part of the dripping tube 6 attached to cover the supply hole 14, and drips into the dripping tube 6 from the dripping hole 7 on the top surface, and is supplied. It is supplied from the hole 14 to the orifice 13 and mixed into the air.

Next, the mounting structure of the flow guide 21 will be explained with reference to FIG.
A through hole 23 that matches the air flow path 3 is provided through the main body 22, and adjustment plates 24, 2 are provided on both sides of the downstream end of the main body 22 to block the side surfaces of the air flow path 3.
4 is provided in a protruding manner, and this adjustment plate is attached in a state where it is curved toward the downstream side by convex portions A, A provided on the body 2.

On the other hand, on the upstream side of the pillar body 12 on the upper surface of the substrate 11, a pair of short mounting pillars 15, 15 are provided with the same spacing as the width of the main body 22 of the flow guide 21 in the flow direction, and the pillar body The flow guide 21 is erected with an interval equal to the thickness of the adjustment plate 24 between the column body 12 and the mounting columns 15 and 1.
5, the main body 22 is inserted from the upper surface side until the bottom surface of the main body 22 hits the upper surface of the substrate 11, and the main body 22
The lower end on the downstream side of is sandwiched between both mounting columns 15, 15, and movement in the direction perpendicular to the flow direction is restrained,
In addition, the lower ends of the base portions of both adjustment plates 24 are sandwiched between the mounting columns 15, 15 and the column body 12, and movement in the flow direction is restrained, so that the main body 22 is placed on the upstream side of the rectangular portion of the column body 12. The through hole 23 of the main body 22 is held in close contact with the end face in alignment with the orifice 13.

Immediately upstream of the mounting columns 15 , 15 on the upper surface of the substrate 11 , a stepped through hole 31 that opens to the lower surface is formed to allow the pressure on the inlet side of the air flow passage 3 to act within the oil tank 1 . The mouth edge of the reduced diameter portion 32 of this through hole 31 forms a valve port 33.
At the same time, a coil spring 34 is fitted into the reduced diameter portion 32 and a ball 35 is placed on the top surface of the coil spring 34. Normally, the valve port 33 is open and the pressure in the air flow passage 3 is transferred to the oil tank 1. When the pressure inside the oil tank 1 decreases when the stopper of the oil filler port (not shown) is removed for refueling, the ball 35 closes the valve port 33 against the elasticity of the coil spring 34, thereby closing the oil filler port. This prevents air from blowing out from the tank to prevent it from interfering with refueling.

In the lubricator with the above structure, the minute air flowing into the air flow passage 3 is blocked by both adjustment plates 24 of the flow guide 21 which is curved downstream by the convex portion A of the body 2, and the air flow between the body 2 and the adjustment plate 24, the oil flows through the through hole 23, and due to the pressure difference between the oil tank 1 and the orifice 13, the oil in the oil tank 1 is sucked up to the top of the drip tube 6, and drips from the drip hole 7 on the top surface. It is dripped into the cylinder 6, supplied to the orifice 13 through the supply hole 14, and mixed into the air.

〔effect〕

According to the present invention, since a small amount of air is reliably flowed into the through hole of the flow guide, oil is reliably dripped, and trouble to pneumatic equipment is eliminated.

[Brief explanation of drawings]

FIG. 1 is a cross-sectional view of the lubricator according to the present invention.
FIG. 2 is a sectional view taken along - in FIG. 1. 1... Oil tank, 11... Board, 12...
Column, 2...Body, 21...Flow guide, 2
3...Through hole, 24...Adjustment plate, A...Protrusion.

Claims (1)

[Scope of utility model registration request] A body with an air flow passage formed in a substantially horizontal direction is attached to the upper surface of the oil tank, and a column body with an orifice formed that projects into the air flow passage is erected on a substrate attached to the lower surface of the air flow passage. A flow guide is installed on the upstream side of the column, the main body having a through hole that matches the orifice, with adjusting plates made of an elastic material protruding from both sides to adjust the flow rate. In the lubricator, the oil sucked up by a pressure difference is mixed into the air flowing through the orifice, and the adjusting plate of the flow guide is protruded in the air flow passage of the body at a position such that it curves toward the downstream side. A lubricator characterized by having a section.