US3786837A

US3786837A - Filling apparatus

Info

Publication number: US3786837A
Application number: US00202684A
Authority: US
Inventors: D Pipkins
Original assignee: Valspar Corp
Current assignee: Valspar Corp
Priority date: 1971-11-26
Filing date: 1971-11-26
Publication date: 1974-01-22
Anticipated expiration: 1991-01-22

Abstract

An outwardly extending discharge line is pivotally connected to a supply line. A torsion spring unit urges the discharge line from a lower dispensing position to a raised position. Apparatus is provided for automatically opening and closing a valve in the supply line in response to movement of the discharge line between its positions. An outlet valve is provided at the outlet of the discharge line and is opened and closed by a pneumatic cylinder controlled by movement of a scale. The outlet valve is a balltype valve having a valve insert with openings of a size such that surface tension of the fluent material will prevent dripping. The insert is formed of a bearing material and is adjustable against the ball valve element to accommodate any wear.

Description

11 Jan. 22, 1974 ite States Patent Pipkins FILLING APPARATUS Fisher avid Pipkins, Downers Grove, Cupp Primary ExaminerArnold Rosenthal The Valspar Corporation, Rockford, Attorney, Agent, or F irm-Morsbach. Pillote & Muir [11.

Inventor:

[73] Assignee:

[57] ABSTRACT An outwardly extending discharge line is pivotally connected to a supply line. A torsion spring unit urges the discharge line from a lower dispensing position to a raised position. Apparatus is provided for automati- [22] Filed: Nov. 26, 1971 [21] Appl. No.: 202,684

Related U.S. Application Data [62] Division of Ser. No. 4,863, Jan. 22, 1970, abandoned.

cally opening and closing a valve in the supply line in response to movement of the discharge line between its positions. An outlet valve is provided at the outlet of the discharge line and is opened and closed by a pneumatic cylinder controlled by movement of a scale. The outlet valve is a ball-type valve having a valve insert with openings of a size such that surface 7 20o m56 .w 23 5/ 62 ,9 57 022 2A s 4 2 /3 l 1 5 53 25 5 ,2kl 2 x 2 39 56 50. 5 2 H2 1:1 W5 W5 2 22 l mmm u 7 u T 3 m m at .m W 4 a m M5 5 w U HP 2 loo tension of the fluent material will prevent dripping. The insert is formed of a bearing material and is adjustable against the ball valve element to accommodate any wear.

[56] References Cited UNITED STATES PATENTS 3,188,048 Sutherland...................... 251/368 X 3 Claims, 7 Drawing Figures BACKGROUND This invention pertains generally to dispensing and more particularly to a filling apparatus for dispensing fluent material.

, In the handling of paint and like materials, there is a danger that the material will harden on the inside of the conduit and thereby restrict the conduit. This danger is increased if the conduit is emptied from time to time. Pivotally mounted discharge lines have been previously known. Where the control valve in such a discharge line is located upstream of the pivot, the discharge line is allowed to drain each time the valve is closed. Where the valve is at the outlet end, there is a possibility of drainback when the discharge line is moved to its raised position. Either situation is disadvantageous when handling paint for the reason previously indicated. Thus, it is desirable that there be provided an apparatus in which the discharge line remains full under all circumstances. Additionallly, it is desirable that any dripping at the outlet be minimized.

SUMMARY The present invention relates generally to dispensing and more particularly to a filling apparatus for dispensing fluentmaterial. In one aspect, the present invention is realized through the provision of a discharge line which is movable between a dispensing position and a raised position, an outlet valve at the outlet end of the discharge line for controlling flow therefrom, a second valve for controlling flow to thee discharge line, and apparatus operative in response to the movement of the discharge line for opening and closing the second valve. Another aspect of the invention is realized though the provision of a ball-type valve at the outlet of the discharge line and a nozzle insert at the valve outlet and having a plurality of openings of a size such that the surface tension of the fluent material will prevent dripping therefrom.

It is a general object of the present invention to provide a filling apparatus for fluent material in which the discharge line remains full at all times.

Another object is to provide a filling apparatus in accordance with the foregoing and including valves at the inlet and outlet of the discharge line and means for controlling the inlet valve in response to movement of the discharge line from a dispensing position to a raised position.

Still another object of the present invention is to provide a filling apparatus in which the outlet valve is automatically shut off when a predetermined quantity of the fluent material is dispensed.

Yet another object is to provide a filling apparatus with a movable discharge line and a spring for resiliently urging the discharge line to a raised position.

It is another object of the present invention to provide a filling apparatus with a discharge valve that prevents dripping from the outlet nozzle.

These, and other objects and advantages of the present invention, will become apparent as the same becomes better understood from the following detailed description when taken in conjunction with the accompartying drawings.

DRAWING FIG. 1 is a view, in part diagrammatic and in part elevational, of one embodiment of the present invention and showing the relation of the parts in raised position v in phantom lines;

FIG. 2 is a sectional view, on an enlarged scale, taken generally along broken line 2--2 of FIG. 1;

FIG. 3 is an end view as seen from the right of FIG.

FIG. 4 is a sectional view taken along line 4-4 of FIG. 3 and on a greatly enlarged scale;

FIGS. 5 and 6 are partial views of two different embodiments of the nozzle insert and as seen from line 55 of FIG. 3; and I FIG. 7 is a diagrammatic view of the electric and pneumatic control circuits used in the present invention.

DESCRIPTION Reference is now made more particularly to the drawings which illustrate the best presently known mode of carrying out the invention and wherein similar reference characters indicate the same parts throughout the several views.

Referring first to FIG. 1, the filling apparatus, generally designated 10, includes an outwardly extending discharge line 12 and a supply line 14. The discharge line 12 is pivotally connected to the supply line 14 by means of a swivel joint 16 to allow the discharge line to be moved in a generally vertical plane between a lower dispensing position and a raised position. The dispensing position is illustrated in FIG. 1 in whole lines while the raised position is shown in phantom lines. A pump P, driven by a motor M, is interposed in the supply line 14 to pump a fluent material such as point to the discharge line 12. In the embodiment illustrated, discharge line 12 has a downwardly extending branch 12a connected to the remainder of the discharge line by means of a second swivel joint 18. Swivel joint 18 permits lateral movement of branch 12a so that its lower end can be associated with an opening in a drum D and accommodate slight irregularities in position. A spring 19 urges the branch 12a to a generally vertical position.

An outlet valve, generally designated 20, is located at the outlet end of discharge line branch 12a for controlling flow from the discharge line. The outlet valve will hereafter be described in greater detail. A second valve 22 is located adjacent the connection of the discharge line 12 to the supply line 14. In the embodiment illustrated, valve 22 is advantageously in the supply line. Valve 22 is of a type that is rotatable between an open and closed position and the rotation is under control of V an external valve arm 23.

Apparatus is provided for opening and closing valve 22 in response to movement of the discharge line 12. In the embodiment illustrated, an arm 24 is pivotally connected to valve arm 23 and to a clamp 25 on the discharge line 12. As can be seen in FIG. 1, movement of the discharge line to a raised position operates to move valve arm 23 to a generally upright position and thus close valve 22. Likewise, movement of the discharge line 12 to its dispensing position moves the valve arm 23 and opens valve 22.

Means is provided for moving the discharge line 12 to its raise position. In the embodiment illustrated, this is'a torsion spring unit, generally designated 30. The

unit is of the type described in U. S. Pat. No.'3,038,714 to R. M. Klaus et al, and reference is made thereto for a complete description. In general, the unit includes a helical spring 32 circumjacent a shaft 34 which extends between

supports

35 and 36. One end of the spring 32 is held by a fixed but adjustable sprocket 30. The other end is secured to a movable arm 41. Arm 41 is pivotally connected to one end of a second arm 42. Arm 42 has its opposite end pivotally connected to a clamp 44 on the discharge line 12. In this manner, when the discharge line 12 is lowered, the spring 32 is wound tighter. A rotatable keeper 46 moves with arm 41. A latch 47 is arranged to engage the keeper and hold the discharge line 12 in its dispensing position. A cable 48 is attached to a handle 49 affixed to the depending branch 12a by means of a U-shaped mounting 51. In this manner, the latch 47 can be disengaged from-the keeper 46 by operating the remote handle 49. When released, the spring 32 tends to unwind and lift the discharge line 12 to its raised position. Stops can be provided to limit the travel of the discharge line 12 to preselected dispensing and raised positions. In the alternative, tension or compression springs, or other means may be utilized for automatically moving the discharge line 12 to its raised position.

Referring again to FIG. 1, it can be seen that drum D, into which the fluent material is dispensed, is positioned on a scale generally designated S. The scale S may be of any convenient construction and may, for example, include a platform 51 and a spring 53. In the alternative, the scale may be a beam balance type. It is contemplated that the tare of the drum D may be set on the scale and that the scale be further set to measure a predetermined quantity of the fluent material dispensed into the drum D.

An actuating means, responsive to the scale S is operative for closing the outlet valve when the preselected quantity of the fluent material has been dispensed into the drum D. For this purpose, outlet valve 20 is under control of a pneumatic cylinder, generally designated 56. Movement of the piston 57 (see FIG. 7) and piston rod 58 operates to open and close valve 20 as hereafter explained.

Referring now to FIG. 7, the circuitry which comprises the actuating means for controlling the outlet valve 20 will be described. As shown, conductors 61 and 62 are connected to a power source. An on-off switch 63 is interposed in conductor 61. When switch 63 is closed, this completes a circuit through line 64, solenoid 65, and normally closed limit switch 66. When actuated, solenoid 65 operates to close normally open switches 67 and 68 interposed in conductors 69 and 71, respectively. Switch 68, when closed, and conductor 71 provide a holding circuit bypassing on-off switch 63.

When switch 67 is closed and maintained closed, by means of the holding circuit, a circuit is completed through conductor 69 and solenoid 72. When actuated, solenoid 72 operates to move a pnumatic valve 74 from the position illustrated in FIG. 7 to its second position. As shown, pneumatic valve 74 is a two-way valve connected to supply line 76 and return line 78. The valve is also connected to lines 82 leading to the upper end of

cylinder

56, and 84 leading to the lower end of cylinder 56 (see FIG. 3). When pneumatic valve 74 directs air from supply line 76 to line 84, piston 57 is moved to its raised position to open valve 20.

At this point, with the dispensing line 12 in its lowered position, both

valves

20 and 22 are in open position and the fluent material is dispensed into the drum D. Limit switch 66 is located adjacent the scale S as shown in FIG. 1. When the predetermined quantity of the fluent material is dispensed into the drum D, limit switch 66 is moved to its open position whereby breaking the completed circuit through line 64. This operates to break the holding circuit and remove power to the solenoid 72. Pneumatic valve 74 is then returned to the position shown in FIG. 7 and air is supplied from supply line 76 to line 82 and the piston 57 is returned to its lower position to turn off valve 20 and stop the flow of fluent material to the drum D.

When the drum D is filled, the operator can operate handle 49 to release the latch 47 and allow the discharge line 12 to be moved to its raised position. As explained above, valve 22 is moved to its closed position in response to movement of the discharge line to the raised position, and the quantity of fluent material between

valves

20 and 22 is trapped in the discharge line 12. This prevents flow from the discharge line, in either direction, and assures that the line is full of the material to be dispensed. As previously explained, when the fluent material is a material such as paint or the like which can harden, it is advantageous to hold the liquid in the lines to alleviate the drying of the material. In certain circumstances, a drainback of the material can create an intermixing of the material with the subsquent material to be dispensed. This can have disadvantages particularly when handling paint.

Referring now to FIGS. 4-6, a preferred embodiment of the discharge valve 20 will be described. As shown, discharge valve 20 is a ball-type valve formed of first and

second members

101 and 102. Member 101 has an inlet 104 connectable to the branch 12a of the discharge line.

Members

101 and 102 are provided with peripheral flanges which are clamped together as by fasteners 106. A resilient gasket 107 is provided between the members to form a seal.

Members

101 and 102 provide a spherical chamber 109 intermediate the inlet 104 and an outlet chamber 110 in member 102. A ball valve element 112 is disposed in the chamber 109 and has a passage 114 therethrough. As usual, the ball valve element 112 is movable between the position illustrated in FIG. 4 to prevent flow through the valve, and a position therefrom which communicates the passage 114 with the inlet chamber 104 to permit flow to the outlet chamber 110. A shaft 116 is attached to the ball valve element 112 to move it between its positions. An arm 117 is affixed to shaft 116 and has an outer end pivotally connected to piston rod 58 for mechanical operation of the valve 20, as explained above.

A nozzle insert generally designated 120, it threaded into the outlet chamber as shown in FIG. 4. Preferably, nozzle insert 120 has a semispherical upper surface 122 for engagement by the ball valve element 112. The nozzle insert is preferably made of graphite impregnated Teflon to provide a lubricated bearing surface at surface 122. Since the insert is semispherical, and threaded into the outlet, it can be easily adjusted against the ball valve element 1 12 to accommodate any wear. Nozzle insert 120 has an outer face 124 as shown in FIG. 5. In the embodiment of FIG. 5, a plurality of openings 126 are provided through the insert between

faces

124 and 122. In the embodiment shown in FIG. 5, there are nine such openings of about one-quarter inch diameter. It has been found that openings of this size, when utilized with a vinyl paint of average viscosity prevents dripping of the paint from the openings. By coordinating the size of the openings with the surface tension of the fluent material, dripping is thus prevented.

An alternate insert 120 is illustrated in FIG. 6. In this embodiment, there are 19 openings of one-quarter inch diameter. The number of openings may be chosen commensurate with the flow characteristics desired through the outlet.

Valve 20, in some uses, need not be mechanically operated as above described. For example, arm 117 on shaft 116 (see FIG. 3) can be manually operated. Under this circumstance, an operator can move the valve to a partially opened position where only a limited number of openings 126 communicate with passagell4. In this manner, an accurate, but lesser flow rate can be easily achieved. This is to be contrasted with a ball valve having a full flow outlet which, when partially opened, has an erratic flow stream. Thus, the

the scope of the appended claims.

I claim:

1. In a filling apparatus including a discharge line for transporting a fluent material, the combination of: a ball-type valve at the outlet of the discharge line for controlling dispensing therefrom, the valve having an inlet connected to the discharge line, an outlet, and a spherical chamber intermediate the inlet and outlet; a ball valve element closely received in the chamber and having a flow passage therethrough; and the element movable between a closed position and an open position when the flow passage communicates the inlet and outlet; the improvement comprising: a nozzle insert at the valve outlet and having a semi-spherical inner surface providing a continuation of the spherical chamber; the nozzle insert having plurality of cylindrical openings therethrough; each opening having a length greater than its diameter and sized so that the surface tension of the fluent material will prevent dripping therefrom; the nozzle insert being formed of a suitable bearing material to provide a good bearing between the insert and the ball valve element; and means adjustably mounting the nozzle insert for selective movement against the ball valve element to accommodate any wear.

2. The combination of claim 1 wherein the nozzle insert is formed of graphite impregnated Teflon.

3. The combination of claim 1 wherein the nozzle insert is threaded into the valve outlet to provide said last-mentioned means.

Claims

2. The combination of claim 1 wherein the nozzle insert is formed of graphite impregnated ''''Teflon.''''