Classifications

• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
  • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
  • F16K15/00—Check valves
  • F16K15/02—Check valves with guided rigid valve members
  • F16K15/03—Check valves with guided rigid valve members with a hinged closure member or with a pivoted closure member
  • F16K15/033—Check valves with guided rigid valve members with a hinged closure member or with a pivoted closure member spring-loaded

Definitions

• the present invention relates to check valves and more particularly relates to an improved check valve apparatus wherein the seat portion of the valve is removable and there ⁇ fore easily replaceable oj: repairable.
• a check valve is a valve structure which is normally placed in a fluid flow line wherein it is desirable to pre- vent the flow of fluids in one direction.
• a check valve will normally retain an open posture when fluid flow is in its proper direction. Upon a reversal of fluid flow, the check valve will effect a closure of the line and thus a stoppage of flow within the line itself in the undesirable direction.
• Check valves are known in the art and the below table lists some prior art check valve devices which have been patented.
• the check valve of the present invention provides an overall valve body which can be placed in a fluid flow line
• the valve body has an opening therein, into which a removable valve seat can be placed and thereafter attached.
• the seat has a recess portion into which a cooperating valv ing member is placed.
• An overall retainer secures the valv ⁇ ing member within the recess of the seat,but does not impai its valving action.
• the retainer provides a stop which pre- vents the valving member from opening an angle greater than ninety degrees.
• the valving member "projects" at leas a small distance into the fluid stream which flows through the overall valve structure. In the case of backflow, clo ⁇ sure of the valving member is insured.
• the removable seat can be provided with a sealing mem ⁇ ber such as an 0-ring on the face which abuts the valve bod
• the recessed portion of the valve seat which receives the valving member therein is likewise provided with an O-ring or like suitable sealing member to insure a fluid type seal upon closure of the valving member.
• Both the removable seat and the retainer are provided with a plurality of openings which correspond to openings provided in the valve body, with all the corresponding openings aligning upon assembly of the valve. Mounting bolts or like connectos can be inser ed through these openings in order to perfect a rigid conne tion of the valve body, seat and retainer upon assembly,but allowing the valving member to move and operate as is desir able.
• Figure 1 is a perspective exploded view of the preferr ⁇ ed embodiment of the apparatus of the present invention
• Figure 2 is a front view of the valve body portion of the preferred embodiment of the present invention
• Figure 3 is a side view of the valve body portion of the preferred embodiment of the apparatus of the present invention
• Figure 4 is a front view illustrating the removable valve seat portion of the preferred embodiment of the appa- ratus of the present invention
• Figure 5 is a sectional .view taken along lines 5-5 of Figure 4;
• Figure 6 is a side view of the valving member portion of the preferred embodiment of the apparatus of the present invention.
• Figure 7 is a front view of the valving member portion of the preferred embodiment of the apparatus of the present invention.
• Check valve 10 is comprised generally of a body 12 having a recess 13 therein through which fluid opening 14 is provided in face 15. Recess 13 is so dimensioned as to accomodate removable seat 16 therein. Seat 16 is provided with a recess 23 into which valving member 18 can be opera- tively placed. The valving member 18 and removable seat 16 are secured within recess 13 of check valve body 12 by means of retainer 30. Seat 16 abuts inner face 15 with 0-ring 25 perfecting a seal.
• Body 12 can be of any size so as to fit conveniently in existing conventional flow line.
• Body 12 can be provided with any type of conventional piping connection (e.g., for example, flanged, screwed, bolted, welded and the like) allowing body 12 to be easily and readily placed into an
• Opening 14 is provided in the central portion of body 12 through which the fluid flowing can pass. Opening 14 can be of any desired diameter.
• removable seat 16 is provided with an opening 17 which corresponds to the opening 14 in valve body 12.
• openings 14 and 17 will align as is desirable.
• the diameter of opening 14 is slightly smaller, e.g. one-sixteenth of an inch less, than opening 17 in order for the surrounding area of body 12 to absorb the initial wear caused by the abrasive fluid flow, allowing the removable seat 16 to last longer.
• Valve body 12 and removable seat 16 are provided with corresponding openings 40,24 which likewise align, and accomodate mounting bolts 35 as will be explained more full hereinafter. It should be understood however, that, when holes 24 of removable seat 16 align with holes 22 of valve body 12, likewise openings 14 of body 12 and 17 of seat 16 are coincident and aligned as is desirable.
• Removable seat 16 is so dimensioned as to slidably fit and register with recess 13 of valve body 12.
• the fit of removable seat 16 within recess 13 is a comfortable fit, allowing however, a small amount of tolerance so that it can be easily inserted and removed for example by hand.
• the down- stream face of removable seat 16 provides a recess 23-__Valv- ing member 18 (see Figures 4 and 5) exactly registers and fits within recess 23 of removable seat 16.
• Recess 23 can be provided with an inner 0-ring 26 placeable in recess 26a or like seal which receives sealably the closure plate 20 portion of valving member 18.
• valve closure plate 20 can pro ⁇ vide a projection 41 which registers with and inserts into
• OMPI TM opening 17 of seat 16 when valve member 18 is in a closed position This projection 41 likewise provides extra weight towards the center portion of the flow line, which urges valving member 18 to close readily during static flow or backflow situations as is desirable.
• Valving member 18 provides pivot pin 19 attached to valving member 18 as can best be seen in Figure 7. Pivot pin 19 and valve plate 20 can be integrally cast as is illu ⁇ strated in the embodiment shown in Figure 7. When valving member 18 is properly placed within recess 23 of removable seat 16, valving member 18 will pivot about the central axis of pivot pin 19.
• Retainer 30 is provided to hold both valve seat 16 and valve member 18 ir their proper position within body 12.
• retainer 30 is sunstantially arcuate in shape, corresponding to the shape generally of removable seat 16, but providing a central opening 31 which allows valving member 18 to pivot to an openmost or to a closed position depending on the direction of flow through openings 14, 17.
• retainer 30 allows proper pivotal action of valving member 18, but does not allow valving member 18 to leave its position within recess 23, as the tip portions 19a,19b of valve pivot pin 19 will be retained by retainer 30.
• Check valve 10 is assembled by placing valving member 18 into recess 23 with projection 27 facing opening 17, the valve closure plate 20 abutting 0-ring 26. It can be seen that when sufficient back pressure is applied to valve mem- ber 18, a substantially fluid tight closure will be effected between valve plate 20 and 0-ring 26, disallowing the flow of fluids in the undesirable direction.
• Removable seat 16 and its contained valving member 18 are inserted into recess 13, such that mounting holes 40,24 coincide, and likewise there is a coincidence between fluid openings 14, 17.
• removable seat 16 and its contained valving member 18 are thus positioned within recess 13 of
• retainer 30 is placed in a likewise corresponding position with openings 32 aligning with the bolt openings 40,24 of body 12 and seat 16 respectively.
• mounting bolts 35, 35a can easily pass through openings 32,24 and 40.
• Openings 40 on body 12 will preferably be threaded, so that an enga ⁇ gement of mounting bolts 35 threadably therein will firmly secure seat 16 and retainer 30 into recess 13 of body 12 as is desirable.
• valving member 18 is allowed to pivot about pin 19 within recess 23, to an eithe open or closed position.
• Retainer 30 can be provided with stop 33. Stop 33 regulates the degrees of opening of valving member 18. It can be seen by one skilled in the art, that upon the pivot of valve member 18 to its openmost position, valve member
• valving member 18 will eventually abut stop 33 halting its pivotal opening It is desirable that valving member 18 not pivot a distance which will allow it to go beyond an angular degree opening of ninety degrees. When undesirable backflow occurs, the valve will be caught by the force of the moving fluid and forced through a closure position with face 20 abutting 0- ring 26. If valving member is open a measure of degrees greater than ninety degrees, it could possibly be urged to open rather than to close by the fluid rushing through open ing 17 in the indesirable direction.
• valve body 12 if valving member 18 is open a measure of degrees less than ninety degrees during backflow, the valving member will always receive pressure from the flowing stream on its upstream face opposite closure plate 20 and projection 27, thus forc ing the valve to close no matter what the overall orienta ⁇ tion of valve body 12.
• Closure spring 28, mounted on bracke 28a by pin 29, can be provided to enhance the positive clo ⁇ sure of valving member 18 during undesirable backflow condi tions or static flow conditions. Bracket 28a can be secured by mounting bolt 35a.
• check valve 10 would nor ⁇ mally be mounted so that pivot pin 19 is at the uppermost
• valve 10 of the present inven ⁇ tion will close no matter what is the orientation of the valve, since the backflow of fluids alone is sufficient to effect a proper closure of valving member 18 against O-ring 26 and opening 17.
• check valve 10 can be inserted in any fluid line or flow line wherein it is desired to halt the flow of fluid in one direction.
• the weight of valving member 18 and/or the spring capacity of closure spring 28 will determine how much fluid pressure is necess ⁇ ary to hold the valve in an open position when flow is in the normal direction.
• valve When fluid flow is in an undesirable or backflow direc ⁇ tion, fluid will strike the closure plate 20 portion of valving member 18, forcing the valve to shut as described more fully above.
• the valve can be used in any number of situations,with a plurality of varying fluids such as slurries, oil, gases, water, and the like.
• the device would be especially useful wherein the flow ⁇ ing fluids contain abrasive substances which would normally wear out seat 16 within a relatively short period of time.
• Such fluids are for example experienced in the drilling of oil and gas wells where sand and other abrasives often mix with the desired ' T ⁇ uid product being transmitted.
• Seat 16 can be easily removed and replaced and/or re-paired by simply disengaging mounting bolts 35, 35a from their respective holes 22 in valve body 12.
• Valve body 12 can be of any suitable valve material , such as cast iron, steel, aluminum or the like.
• the inner valving portions which would receive the greatest amount of wear would be removable seat 16,valving member 18, and retainer 30.
• These parts could be manufactur ed of any suitable high quality and abrasive resistant mate rial such as stainless steel, cast iron, cast aluminum or the like. hese parts could be kept in “inventory” and easil replaced “on-site” by merely removing mounting bolts 35 as was discussed more fully above.
• the present invention provides a check valve which is simple in operation, and easily maintainable with a minimum amount of labor involved.
• the device provides a removable seat 16 which can be quickly and easily replaced or repaired, seat 16 being the part of check valve 10 which is most susceptible to abrasive wear, especially in the oil and gas field where sand and like abrasives can become mixe with the fluid being transmitted. Because many varying and different embodiments may be made .within the scope of the inventive concept herein taugh and because many modifications may be made in the embodimen herein detailed in accordance with the descriptive require ⁇ ments of the law, it is to be understood that the details herein are to be interpreted as illustrative and not in a limiting sense.

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• Engineering & Computer Science (AREA)
• General Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Check Valves (AREA)

Priority Applications (7)

Applications Claiming Priority (2)

Publications (1)

Family

ID=22154299

Family Applications (1)

Country Status (5)

Cited By (2)

Citations (8)

• 1980
  • 1980-04-28 JP JP81500663A patent/JPS57500793A/ja active Pending
  • 1980-04-28 EP EP19810900347 patent/EP0051062A4/en not_active Withdrawn
  • 1980-04-28 BR BR8009039A patent/BR8009039A/pt unknown
  • 1980-04-28 WO PCT/US1980/000463 patent/WO1981003212A1/en not_active Application Discontinuation
• 1981
  • 1981-12-22 DK DK572381A patent/DK572381A/da unknown

Patent Citations (8)

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