KR20140040057A - Drain vent for petroleum/chemical fluid pumping devices and method of making the same - Google Patents

Abstract

FIELD OF THE INVENTION The present invention relates to a fluid pumping device for use in the industry of handling petroleum and / or chemicals, the device comprising a cast fluid housing member having an inlet or outlet for a fluid pumping device, an inlet for a fluid pumping device or A drain / vent tubular connection extending through the cast fluid housing to communicate with the outlet and a flanged adapter member sealably fixed to the cast fluid housing. The present invention also provides a method of making a drain / vent tube for structural communication with an inlet or outlet of a fluid pumping device.

Description

Drain vent for fluid pumping device for petroleum / chemicals and its manufacturing method {DRAIN VENT FOR PETROLEUM / CHEMICAL FLUID PUMPING DEVICES AND METHOD OF MAKING THE SAME}

The present invention relates to a drain vent for a fluid pumping device for petroleum / chemicals and a method of manufacturing the same. A flange-mounted drain and / or vent tube mounted to an inlet or outlet and a flange-mounted drain and / or vent tube to a casting of a fluid pumping apparatus.

Fluid pumping devices used in the field of handling petroleum products and chemicals include a multi-part drain and / or vent tube assembly connected to the inlet or outlet of such a fluid pumping device. Requires the use of). Attaching a drain and / or vent tube to a fluid pumping device used in the field of handling of petroleum products and chemicals currently or conventionally places a multiple part drain and / or vent tube assembly at the inlet or outlet of the fluid pumping device. A series of welding processes were used to secure the connection. Because these fluid pumping devices are used in the handling of petroleum products and chemicals, the American Petroleum Institute (API) publishes and requires rigorous testing, inspection and maintenance of each weld. These tests include radiographic and liquid penetrant testing of each weld to allow the weld to pass the test. However, due to the difficulty in accessing each weld for such inspections and tests, these inspections and tests are costly, time consuming and labor intensive, with significant costs in the construction and maintenance of each petroleum and chemical pumping device. Is added.

In addition, in the practice of petroleum products and chemicals, flange members are attached to the ends of the drain and / or vent tubes extending from the casing or suction base of the pumping device. The attachment of these flanges is carried out using welds, which must pass the inspection and test. Since this attachment flange extends outward from the molded fluid housing or suction base of the pumping device, the weld, in particular the joint between the drain / vent tube and the pump casing, when bending or applying a load on the elongated flange Fatigue fractures in the joints require additional welding and subsequent tests and inspections.

The present invention is directed to solving the above-mentioned problems associated with the drain and / or vent assembly of a fluid aid or pumping device.

It is also an object of the present invention to provide a method for attaching or fixing a drain or vent tube member to an inlet or outlet of a fluid pumping device.

The main drawback of the conventional pumping device is overcome by eliminating the process of using welding to fix a drain and / or vent tube of multiple parts at the inlet or outlet of the pumping device. The method of the present invention is carried out by drilling or fabricating tubular drain / vent conduits in the cast fluid housing for communication between the inlet or outlet of the pumping device and the cast fluid housing which is cast. The outer surface of the cast fluid housing surrounding the tubular opening of the drain / vent may allow the attachment of the flanged drain and / or vent adapter member to the cast fluid housing coaxially with respect to the tubular drain / vent conduit. So that it is substantially vertical. In addition, the outer surface facing the cast fluid housing surrounding the tubular opening of the drain / vent is substantially planar for attaching the flanged adapter member to the cast fluid housing. The flanged adapter member is fixed to the cast fluid housing by using a plurality of bolt members coupled to the spiral holes of the cast fluid housing.

The flanged adapter member includes a machined protrusion that is structurally disposed to hermetically engage a recessed shoulder portion that surrounds the opening for the tubular drain / vent member of the extended through hole and the cast fluid housing. do. In addition, the protruding cast fluid housing that encloses the opening to the perforated tubular drain / vent member allows the cut protrusion of the flanged adapter member to be inserted when the flange member is attached to the fluid housing and sealed therebetween. Includes a recessed shoulder portion.

BRIEF DESCRIPTION OF THE DRAWINGS The present invention consists of novel structures and methods specifically pointed out in the description and claims with reference to the accompanying drawings. It will be appreciated that the present invention may be modified in various ways without departing from the spirit or scope thereof.

The above-mentioned features and other features, objects, configurations and advantages of the present invention will be described in more detail with reference to the accompanying drawings.

1 is a perspective view of a drain and / or vent assembly connected to a cast fluid housing of a prior art petroleum and chemical pumping device.
2 is a cross-sectional view of the cast fluid housing along line 2-2 through the drain and / or vent assembly shown in FIG.
FIG. 3 is a perspective view showing a cut flange adapter member attached to a drain and / or vent conduit in a cushion base of a petroleum and chemical pumping apparatus according to the present invention. FIG.
4 is a sectional view taken along line 4-4 of Fig.
5 is a perspective view of a cut flange adapter member according to the present invention;
FIG. 6 is a perspective view illustrating coupling and machining a flanged flanged adapter member to a cast fluid housing of a pumping apparatus to axially couple and seal the drain / vent member in accordance with the present invention. FIG.

In the drawings, the same or similar parts are denoted by the same reference numerals throughout. 1 and 2, a drain and / or vent composed of a plurality of parts in an inlet or outlet 13 of a fluid pumping device 10 having a cast fluid housing 11 mounted on a housing support 11b according to the prior art. It is shown that the tube assembly 12 is attached. As shown in FIG. 2, the prior art drain / vent tube assembly 12 includes a plurality of joints 12a, a curved portion 12b, and an extension 12c extending through the cast fluid housing sidewall 15. As shown in FIG. It is composed of parts. The various parts of the drain / vent tube assembly 12 are connected and fixed together by a weld 16, which weld tube consists of a plurality of parts with respect to the inlet or outlet 13 of the cast fluid housing 11. A weld 16a for integrally fixing the coupling portion 12a of the assembly 12, a weld 16b for integrally fixing the curved portion 12b of the tube assembly 12 with respect to the coupling portion 12a of the assembly, and And a weld 16c integrally fixing the extension 12c of the assembly 12 with respect to the curved portion 12b of the assembly.

In addition, in the practice of the drain / vent tube assembly 12 of the prior art, the extension part 12c of the drain / vent tube member or assembly 12 is the opening of the cast fluid housing 11 of the pumping device 10. It extends outward through 14. In such an assembly, a support reinforcement 14a for the drain / vent tube assembly 12 extending through the opening 14 in the cast fluid housing 11 to prevent cracking of the drain / vent tube assembly from the pumping device. In order to fix this, the welded portion 16d is required. Finally, in the field of petroleum products and chemicals, the outer end 12d of the drain / vent tube assembly 12 is provided by a flange weld 16e to the valve to complete the connection to the vent pipe (not shown). ) To the flange member 17 having the through hole 17a.

The fluid pumping device 10 is designed for use in the field of handling of petroleum products and chemicals. Therefore, the American Petroleum Institute (API) mandates rigorous testing and inspection of each weld associated with the fluid pumping device by requiring a radiographic and liquid penetrant examination of each weld. However, these tests and inspections are costly and time consuming. Therefore, by reducing the number of welds and eliminating the difficulty of access to the various welds related to the pumping device, the substantial savings in labor and labor costs associated with such testing and inspection are the costs for the fabrication and maintenance of the fluid pumping device of the present invention. To ensure substantial savings.

In addition, the fluid pumping device according to the present invention has a long service life because the fluid pumping device has durability against breakage or leakage. The labor and cost saved by the present invention by excluding the need for welding has been found to have the advantage of saving 7-10 percent cost for the fluid pumping device fabricated according to the present invention.

The present invention relates to a simple assembly and structure for communicating the drain / vent tube member 12 to the inlet or outlet 13 of the fluid pumping device 10. The fluid pumping device 10 includes a cast fluid housing 11 having an inlet or outlet 13 of a fluid. The cast fluid housing 11 is preferably composed of 316L stainless steel, as is well known. However, it is also within the scope of the present invention that the monolithic drain / vent tube member 12 is connected in communication with the fluid inlet or outlet 13 of the pumping device 10. The cast fluid housing 11 of the fluid pumping device cuts or drills the drain / vent tube member 12 through the cast fluid housing in communication with the inlet or outlet 13 of the pumping device, as best seen in FIG. 4. It provides a structure that can be manufactured by. After cutting or drilling the drain / vent tube 12 in the cast fluid housing 11, the cast side wall of the cast fluid housing in the vicinity of the outer open end 12d of the cut drain / vent tube 12 ( 15, the expansion ring through hole 18 or the request is machined in the axial direction. As will be described later in detail, the cast side wall 15 adjacent to the annular through hole 18 has a flat portion 19 capable of directly attaching the cut flanged adapter member 20 to the cast side wall of the cast fluid housing. .

The flanged adapter member 20 is an integral type that is structurally aligned and coupled to the axial through hole 22 and the outer end 12d of the drain / vent tube member 12 when the adapter member is disposed in the annular through hole 18. And male protrusions 24. The male protrusion 24 of the flanged adapter member 20 extending forward includes at least one annular recess 25 extending around it. As shown in FIG. 6, two annular recesses 25 are formed on the outer surface of the male protrusion 24 of the flange-type adapter member 20. In this annular recess 25, an O-ring seal 26 can be inserted as shown in FIG. 6.

In addition, as shown in Figure 6, the flange type adapter member 20 uses a plurality of bolt members 28 coupled to the spiral hole 30 formed in the planar cast side wall 15 of the cast fluid housing 11 It is configured to be attached to the vertical plane portion 19 of the cast side wall (15). The O-ring seal 26 disposed on the annular recess 25 is a bolt member 28 coupled to the spiral hole 30 formed in the planar cast side wall 15 of the cast fluid housing 11. By fixing 20, the protrusion 24 can be installed in the annular through-hole 18 in a sealable manner. The bolt member 28 is coupled to the flanged adapter member 20 to be coupled to the spiral hole 30 so that a hermetic coupling between the cut flanged adapter member 20 and the drain / vent tube member 12 can be made. It is installed through the reinforcing hole 32 of the flange-type adapter member.

The second flange member 34 having the longitudinally extending through hole 35 is fixed to the annular through hole 22 of the flange-shaped adapter member 20 by the welding portion 36 to complete the assembly. The flange member and the annular through hole formed therein form an outlet end for the drain / vent member 12 from the fluid pumping device 10 to a valve for connection to a vent pipe (not shown).

The present invention provides a method of making a drain / vent tube 12 for structural communication with an inlet or outlet of a fluid pumping device 10. This manufacturing method comprises the steps of casting a fluid housing, drilling a drain / vent tube through the fluid housing to communicate with the inlet or outlet of the pumping device, and coupling the drain / vent tube to allow the discharge of fluid from the pumping device. And mechanically fixing the flanged adapter member to hermetically couple the adapter member to the fluid housing.

The flanged adapter member 20 includes a male projection 24 and is machined to have at least one annular recess in the annular outer surface of the male projection 24. The fluid housing provides a substantially planar mounting surface 24. The fluid housing provides a substantially planar mounting surface around the outer open end 12d of the drain / vent tube 12, preferably an enlargement formed in the cast fluid housing around the outer open end of the drain / vent tube. Contains annular through-holes. The cut flanged adapter member 20 and the integral male protrusion 24 are enlarged annular holes 18 of the side wall 15 when the cut flanged adapter member 20 is fixed to the fluid housing side wall 15. It is configured to be sealingly coupled to). This assembly allows a seal to be made between the adapter member 20 and the cast fluid housing as shown in FIG.

In FIG. 6, two O-ring seals 26 are disposed in each of the two annular recesses formed in the male projections 24 of the cut flanged adapter member 20. The O-ring seal allows a seal to be made between the annular inner surface of the male projection 24 and the annular recess 18 when the flanged adapter member is secured to the plane surrounding the annular through hole.

In addition, it is preferable that the support protrusion 15a is formed on the side wall 15 of the cast fluid housing above the attachment area of the adapter member 20 to the fluid housing. This support protrusion minimizes cracking by applying force at the joint between the adapter member and the side wall of the cast fluid housing. This structure lengthens the service life of the fluid pumping device.

While specific embodiments of the invention have been illustrated and described above, it will be apparent to those skilled in the art that changes or modifications can be made therein without departing from the scope of the invention. Accordingly, it is an object of the appended claims to cover all such changes and modifications as fall within the spirit and scope of the invention.

10: fluid pumping device, 11: fluid housing, 12: drain / vent tube assembly, 13: inlet or outlet, 14: opening, 15: side wall, 16: weld, 17: flange member, 18: annular through hole, 19: Flat part, 20: cut flanged adapter member, 22: axial through hole, 24: integral male projection, 25: annular recess, 26: O-ring seal, 28: bolt member, 30: spiral hole, 32 : Reinforcement. 34: second flange member, 35: through hole, 36: welded portion.

Claims (9)

In a fluid pumping device for use in the industrial field of petroleum and / or chemicals,
(a) a cast fluid housing member having sidewalls having an inlet or outlet for a fluid pumping device;
(b) a drain / vent tubular connection disposed in the cast fluid housing and coupled to the inlet or outlet of the fluid pumping device and having an outlet end at the sidewall;
(c) a flanged adapter member secured to the cast fluid housing and structurally disposed in communication with the drain / vent tubular connection;
Fluid pumping device for use in the industrial field of handling petroleum and / or chemicals, characterized in that it comprises a. The fluid pumping device of claim 1, wherein the drain / vent tubular connection is disposed in the fluid housing to communicate with an inlet or outlet of the pumping device by puncturing the drain / vent tubular connection to the fluid housing. 2. The fluid pumping apparatus of claim 1, wherein the sidewall of the cast fluid housing is disposed substantially perpendicular to the outlet end of the drain / vent tubular connection from the fluid housing. 4. A fluid pump as claimed in claim 3, wherein said side wall of said fluid housing includes an annular recess extending around said outlet end of said drain / vent tubular connection. 2. The fluid pump of claim 1, wherein the flanged adapter member comprises a male protrusion structurally coupled to the cast fluid housing to communicate with the axial aperture extending therethrough and the drain / vent tubular connection. Device. 5. The fluid pumping device of claim 4, wherein the flanged adapter member includes an axial aperture extending therethrough and a male protrusion structurally coupled to the annular recess formed in the side wall of the fluid housing. . 6. A fluid pump as claimed in claim 5, wherein the male projection comprises at least one annular recess extending around it. 6. The fluid pumping apparatus according to claim 5, wherein each of said at least one annular recess formed in said male projection includes an O-ring member for sealing said flanged adapter member with respect to said fluid housing. In the method of manufacturing a drain / vent tube for structural communication with the inlet or outlet of the cast fluid pumping device, the method
a. Drilling a drain / vent tubular connection to the cast fluid pumping device to communicate with the inlet or outlet;
b. Mounting a flanged adapter member in a cast fluid pumping device to communicate with the drain / vent tubular connection to permit the discharge of fluid from a pumping device;
Method for producing a drain / vent tube in communication with the inlet or outlet of the cast fluid pumping device comprising a.

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