FLUID END FOR A PLUNGER PUMP

• US 3,801,234 A
• Filed: 05/14/1973
• Issued: 04/02/1974
• Est. Priority Date: 05/14/1973
• Status: Expired due to Term

• Current Assignee: Everett H. Lock, Joe K. Heilhecker, William C. Maurer, William W. Love
• Original Assignee: Everett H. Lock, Joe K. Heilhecker, William C. Maurer, William W. Love
• Inventors: Lock, Everett H., Maurer, William C., Heilhecker, Joe K., Love, William W.
• Primary Examiner(s): Husar, C. J.
• Assistant Examiner(s): Smith, Leonard E.
• Application Number:
  US05/359,806
• Time in Patent Office: 323 Days
• Field of Search: 417/437,454,568,569,570,571,572,567 92/128 137/515,515.3,515.5,454.4 285/367
• US Class Current: 417/454
• CPC Class Codes: F04B 53/00 Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
• CPC Class Codes: Y10T 137/7856 Valve seat formed on or carried by a coupling element

Abstract

An improved cylindrical fluid end construction for a plunger pump includes a cylinder body, a crossbore body, and suction and discharge valve cages. The components are assembled together by quick-disconnect couplings having self-energizing seals for pressure sealing the joints. The diameters of flow passages formed in the crossbore body are less than that of the pump plunger.

Claims

1. In a plunger pump, an improved fluid end construction comprising:

a cylinder body having a plunger bore formed therein;

a plunger mounted in said bore and adapted to reciprocably move therein;

a crossbore body having suction and discharge flow passages formed therein, the diameter of each of said flow passages being substantially smaller than the diameter of said plunge plunger;

first coupling means for joining said cylinder body and said crossbore body wherein said flow passages are in fluid communication with said plunger bore;

a suction valve cage containing a part at least of a suction valve;

second coupling means for joining said crossbore body and said suction valve cage wherein said suction flow passage is in fluid communication with said suction valve;

a discharge valve cage containing a part at least of a discharge valve; and

third coupling means for joining said crossbore body and said discharge valve cage wherein said discharge flow passage is in fluid communication with said discharge valve, each of said coupling means including a segmented collar adapted to clamp together the members being joined, and a self-energizing seal ring engaging internal surfaces of each member being joined, the engagement of said seal ring on said surfaces being such that the fluid pressure internally of said seal ring tends to increase the engagement pressure.

2. The invention as recited in claim 1 wherein the ratio of the plunger diameter tO the diameter of each flow passage being at least 2.

3. The invention as recited in claim 2 wherein said flow passages intersect within said crossbore body.

4. The invention as recited in claim 1 wherein each of said valve cages comprise separable housing members and coupling means for joining the housing members together, said coupling means including a segmented collar adapted to clamp said housing members together and a self-energizing seal ring engaging an internal surface of each housing member.

5. The invention as recited in claim 1 wherein said discharge valve cage contains the complete discharge valve.

6. The invention as recited in claim 1 wherein said suction valve cage contains the complete suction valve.