TW201708704A - Flushable pump fluid chamber - Google Patents

Abstract

A fluid cover for a displacement pump includes an inlet and an outlet oriented to provide desired flow characteristics to fluid entering a fluid chamber defined between the fluid cover and a diaphragm. The inlet is positioned to provide fluid to the fluid chamber at an oblique angle relative to the fluid cover. The oblique angle prevents the fluid from impinging on the fluid cover and the diaphragm, thereby maintaining a fluid velocity within the fluid chamber. The fluid velocity and rotational movement of the fluid facilitates flushing of the fluid chamber, as areas of low velocity or no velocity are eliminated from the fluid chamber, thereby preventing residuals from settling within the fluid chamber. The outlet is also positioned at an oblique angle to the fluid cover to maintain the rotational movement of the fluid flow.

Description

Flushable pump fluid chamber Cross-reference to related applications

The present application claims priority to U.S. Provisional Application Serial No. 62/193,241, the entire disclosure of which is hereby incorporated by reference in its entirety in its entirety in its entirety in Incorporate.

The present invention relates to positive displacement pumps and more particularly to fluid closures for positive displacement pumps.

The positive displacement pump discharges a process fluid at a selected flow rate. In a typical positive displacement pump, a fluid displacement component (usually a piston or diaphragm) drives process fluid through the pump. When the fluid displacement member is pulled in, a suction condition is formed in a fluid chamber between the fluid cover and the fluid displacement member, which draws process fluid from the inlet manifold into a fluid cavity. The fluid displacement component then reverses the direction and forces process fluid to exit the fluid chamber through the outlet manifold.

After application of the process fluid, or when a positive displacement pump is to be used to apply a different process fluid, the pump must be flushed to remove any residual process fluid remaining in the fluid chamber. The pump operates in a typical manner and drives a solvent or other cleaning fluid through the fluid chamber. The pump continues to drive the cleaning fluid through the fluid chamber until the fluid chamber is sufficiently cleaned. The volume of cleaning fluid required varies depending on the fluid flow path within the fluid chamber, as the area of low fluid velocity or fluid free velocity allows contaminants to settle within the fluid chamber, thereby requiring Additional flushing to ensure that the fluid chamber is adequately flushed.

According to one aspect of the invention, a pump includes: a pump drive system; a first fluid displacement component disposed at a first end of the pump drive system; a first fluid cover, Attaching to the first end of the pump drive system and securing the first fluid displacement member between the first end and the first fluid cover; an inlet manifold attached to the first a fluid cover; and an outlet manifold attached to the first fluid cover. The first fluid cover includes a first cover body defined by a first inner wall and a first outer wall. The first inner wall and the first fluid displacement member define a first fluid chamber. A first fluid port and a second fluid port extend through the first cover body. The first fluid port includes a first inner bore extending through the first inner wall and configured to direct first through the first inner bore and to the first inner bore relative to one of the inner walls In the first fluid chamber. The second fluid port includes a second inner bore extending through one of the first inner walls and configured to direct first through the second inner bore at a second angle of inclination relative to one of the first inner walls. The first inner aperture is disposed at a first radial distance from one of the centers of the first inner wall and the second inner aperture is disposed at a second radial distance from the center. The inlet manifold is configured to provide a fluid to the first fluid chamber through the first inlet. The outlet manifold is configured to receive the fluid from the fluid chamber through the first outlet.

In accordance with another aspect of the invention, a fluid cover for a pump includes a cover body extending between a convex outer wall and a concave inner wall. A first fluid port extends through the body and a second fluid port extends through the body. The first fluid port includes a first outer aperture, a first inner aperture extending through one of the concave inner walls, and a first flow path extending between the first outer aperture and the first inner aperture. The first inner aperture is positioned on the concave inner wall such that a pumped fluid passes through the first inner aperture at a first angle of inclination relative to one of the concave inner walls. The second fluid port is disposed opposite the first fluid port and includes a second inner opening extending through the concave inner wall, a second outer opening, and the second outer A second flow path extends between the aperture and the second inner aperture. The second inner aperture is positioned on the concave inner wall such that the pumped fluid passes through the second inner aperture at a second angle of inclination relative to one of the concave inner walls.

In accordance with yet another aspect of the present invention, a method of flushing a fluid chamber includes: drawing a fluid through an inlet orifice into a fluid chamber defined between a fluid cover and a fluid displacement component; and driving the fluid through A second inner orifice positioned to receive one of the fluids circulating within the fluid chamber exits the fluid chamber. The inlet aperture is positioned to provide the fluid to the fluid chamber at a first angle of inclination relative to one of the inner walls of the fluid cover, thereby imparting a rotational movement of the fluid into the fluid chamber. The second inner aperture is positioned on the inner wall to direct the fluid at a second angle of inclination relative to one of the inner walls.

10‧‧‧

12‧‧‧Drive system

14a‧‧‧Fluid cover

14b‧‧‧Fluid cover

16‧‧‧Inlet manifold

18‧‧‧Export manifold

20‧‧‧ gas valve

22a‧‧‧Inlet check valve

22b‧‧‧Inlet check valve

24a‧‧‧Export check valve

24b‧‧‧Export check valve

26a‧‧‧Fluid displacement components

26b‧‧‧Fluid displacement components

28‧‧‧ pump shaft parts

30‧‧‧o ring

32a‧‧‧ Cover subject

32b‧‧‧ cover subject

34a‧‧‧ inner surface

34b‧‧‧ inner surface

36a‧‧‧Outer surface

36b‧‧‧Outer surface

38a‧‧‧First fluid port

38b‧‧‧First fluid port

40a‧‧‧Second fluid port

40b‧‧‧Second fluid port

42a‧‧‧Circle edge

44a‧‧‧Separator

44b‧‧‧Separator

46a‧‧‧diaphragm plate

46b‧‧‧diaphragm plate

48a‧‧‧Clamps

48b‧‧‧Clamps

49‧‧‧Management fasteners

50a‧‧‧ fluid chamber

50b‧‧‧ fluid chamber

52a‧‧‧First check valve housing

54a‧‧‧Second check valve housing

56a‧‧‧First inner opening

58a‧‧‧First outer orifice

60a‧‧‧First flow path

62a‧‧‧Second inner orifice

64a‧‧‧Second outer orifice

66a‧‧‧Second flow path

A‧‧‧ points

A-A‧‧‧Axis

F‧‧‧Flower line

R1‧‧‧radial distance

R2‧‧‧radial distance

Figure 1 is an exploded perspective view of one of the pumps.

Figure 2 is an elevational view of a bonnet.

Figure 3A is a side elevational view of one of the pump covers having an exposed fluid port.

Figure 3B is an isometric view of one of the fluid flow paths through a fluid port.

Figure 1 is an exploded perspective view of one of the pumps 10. The pump 10 includes a drive system 12, fluid covers 14a and 14b, an inlet manifold 16, an outlet manifold 18, a gas valve 20, inlet check valves 22a and 22b, outlet check valves 24a and 24b, a fluid displacement member 26a, and 26b, the pump shaft member 28 and the o-ring 30. The fluid cover 14a includes a cover body 32a, an inner surface 34a, an outer surface 36a, a first fluid port 38a, and a second fluid port 40a. Inner surface 34a includes a circumferential edge 42a. The fluid displacement member 26a includes a diaphragm 44a and a diaphragm plate 46a. The fluid cover 14b includes a cover body 32b, an inner surface 34b, an outer surface 36b, a first fluid port 38b, and a second fluid port 40b. Inner surface 34b includes a circumferential edge that is similar to one of circumferential edges 42a. The fluid displacement member 26b includes a diaphragm 44b and a diaphragm plate 46b.

The gas valve 20 is coupled to the drive system 12 and configured to direct compressed air to the drive System 12. The pump shaft member 28 extends through the drive system 12 and is driven in a reciprocating manner along the axis A-A by the compressed air provided by the gas valve 20. The fluid displacement member 26a is coupled to one of the first ends of the pump shaft member 28. The diaphragm 44a is directly coupled to the first end of the pump shaft member 28, wherein the diaphragm plate 46a is disposed between the pump shaft member 28 and the diaphragm 44a. Similar to the fluid displacement component 26a, the fluid displacement component 26b is coupled to one of the second ends of the pump shaft member 28. The diaphragm 44b is directly coupled to the second end of the pump shaft member 28, with the diaphragm plate 46b disposed between the pump shaft member 28 and the diaphragm 44b.

The fluid cover 14a is attached to one of the first ends of the drive system 12 by a cover fastener 48a. A peripheral edge of diaphragm 44a is disposed between fluid cover 14a and drive system 12, with fluid cover 14a and drive system 12 securing diaphragm 44a in place. The peripheral edge of diaphragm 44a forms a fluid seal between fluid cover 14a and drive system 12. The diaphragm 44a and the inner surface 34a define a fluid chamber 50a. The fluid cover 14b is attached to one of the second ends of the drive system 12 by a cover fastener 48b. One of the peripheral edges of the diaphragm 44b is disposed between the fluid cover 14b and the drive system 12 and is held in place by the fluid cover 14b and the drive system 12. The peripheral edge of diaphragm 44b forms a fluid seal between fluid cover 14b and drive system 12. The diaphragm 44b and the inner surface 34b define a fluid chamber 50b. It should be understood that the drive system 12 can be configured to drive the pump shaft member 28 in any suitable manner, such as pneumatically, electrically, hydraulically, or in any other suitable manner.

The inlet check valve 22a and the outlet check valve 24a are disposed in the fluid cover 14a. Similarly, the inlet check valve 22b and the outlet check valve 24b are disposed in the fluid cover 14b. Although the inlet check valves 22a and 22b and the outlet check valves 24a and 24b are shown as self-contained weirs including all of the operational components of a check valve in a replaceable bore, it will be understood that the inlet check valve 22a can be Any suitable configuration for allowing flow from the inlet manifold 16 to the fluid chamber 50a and the outlet check valve 24a can be any suitable configuration for allowing flow from the fluid chamber 50a to exit the manifold 18. For example, the fluid cover 14a can be configured to receive individual components of the inlet check valve 22a and the outlet check valve 24a (such as a ball and a lift or poppet valve) without the need for a shackle, Or it may include a permanently installed check valve.

The first fluid port 38a extends through the cover body 32a between the inlet check valve 22a and the inner surface 34a. The first fluid port 38a extends through the inner surface 34a proximate the circumferential edge 42a. The first fluid port 38a is configured to impart a swirling flow of the pumped fluid into the fluid chamber 50a. To impart this swirling flow, the first fluid port 38a is positioned to introduce the pumped fluid into the fluid chamber 50a at an angle of inclination relative to one of the diaphragm 44a and the inner surface 34a. This angle of inclination prevents the pumped fluid from impinging on the diaphragm 44a or inner surface 34a as it is pumped into the fluid chamber 50a.

The second fluid port 40a also extends through the cover body 32a between the outlet check valve 24a and the inner surface 34a. Similarly, the second fluid port 40b extends through the cover body 32b between the outlet check valve 24b and the inner surface 34b. The second fluid port 40a is configured to receive the pumped fluid within the fluid chamber 50a and direct the fluid outwardly through the outlet check valve 24a to the outlet manifold 18. The second fluid port 40a is configured to impart and maintain a swirling flow through the pump cycle, and the second fluid port 40a is oriented such that the second fluid port 40a extends through an angle of inclination relative to one of the inner surface 34a and the diaphragm 44a Inner surface 34a. To ensure that the desired flow characteristics are achieved, the second fluid port 40a can be mirrored by one of the first fluid ports 38a. Similar to the first fluid port 38a, the second fluid port 40a also extends through the inner surface 34a proximate the circumferential edge 42a. Locating both the first fluid port 38a and the second fluid port 40a proximate the circumferential edge 42a promotes swirling at the periphery of the fluid chamber 50a where the diaphragm 44a meets the fluid cover 14a, thereby passing a solvent or other cleaning agent through the pump The rinsing properties are enhanced as it passes through the fluid chamber 50a. The rinsing properties are enhanced by the swirling flow maintaining a constant fluid velocity in the fluid chamber 50a and removing more contaminants in a faster manner.

The first fluid port 38b extends through the cap body 32b between the inlet check valve 22b and the inner surface 34b. Similar to the first fluid port 38a, the first fluid port 38b is configured to impart a swirling flow of fluid into the fluid chamber 50b. The first fluid port 38b is positioned to introduce the pumped fluid into the fluid chamber at an angle of inclination relative to one of the diaphragm 44b and the inner surface 34b 50b, and the first fluid port 38b extends through the inner surface 34b proximate the circumferential edge of the inner surface 34b. The second fluid port 40b also extends through the cover body 32b between the outlet check valve 24b and the inner surface 34b. The second fluid port 40b is configured to receive fluid within the fluid chamber 50b and direct the fluid outwardly through the outlet check valve 24b to the outlet manifold 18. Similar to the second fluid port 40a, the second fluid port 40b extends through the inner surface 34b at an oblique angle relative to one of the diaphragm 44b and the inner surface 34b. The second fluid port 40b extends through the inner surface 34b proximate the circumferential edge of the inner surface 34b. To ensure that the desired flow characteristics are achieved, the second fluid port 40b can be mirrored by one of the first fluid ports 38b.

The inlet manifold 16 is attached to both the fluid cover 14a and the fluid cover 14b by a manifold fastener 49. The inlet manifold 16 is configured to provide fluid to both the fluid chamber 50a (through the first fluid port 38a) and the fluid chamber 50b (through the first fluid port 38b). The outlet manifold 18 is also attached to both the fluid cover 14a and the fluid cover 14b by a manifold fastener 49. The outlet manifold 18 is configured to receive fluid from both the fluid chamber 50a (through the second fluid port 40a) and the fluid chamber 50b (through the second fluid port 40b). The outlet manifold 18 provides fluid downstream to a downstream application, such as a paint applicator.

It should be understood that the fluid cover 14a is configured such that the pumped fluid can be provided to the fluid chamber 50a through the first fluid port 38a or the second fluid port 40a such that the first fluid port 38a or the second fluid port 40a can be used as an inlet. . In this example, the outlet manifold 18 can be coupled to the other of the first fluid port 38a or the second fluid port 40a such that the first fluid port 38a or the second fluid port 40a acts as an outlet. In this manner, the fluid covers 14a and 14b can be reversed such that the inlet can serve as an outlet and the outlet can serve as an inlet. In addition, having the fluid cover 14a and the fluid cover 14b reversed provides an error proof function such that the fluid cover 14a can be mounted to the first or second end of the drive system 12 and the fluid cover 14b can be mounted to the fluid cover 14a is opposite the end of the drive system 12.

During operation, compressed air is introduced into the drive system 12 through the gas valve 20 to drive the pump shaft member 28. The compressed shaft air causes the pump shaft member 28 to reciprocate and the pump shaft member 28 alternates The fluid displacement member 26a is driven to contract and expand the fluid chamber 50a, and drive the fluid displacement member 26b to contract and expand the fluid chamber 50b. The pumping operation for fluids pumped through fluid chambers 50a and 50b is substantially similar, so the pumping operation for fluid chamber 50a will be discussed in further detail. During a first stroke, the pump shaft member 28 drives the fluid displacement member 26b into the fluid chamber 50b and the pump shaft member 28 simultaneously pulls the fluid displacement member 26a, thereby pulling the fluid displacement member 26a away from the fluid cover 14a. Thereby increasing the volume of one of the fluid chambers 50a. Pulling the fluid displacement member 26a causes the inlet check valve 22a to open and create an inhalation condition in the fluid chamber 50a, thereby drawing fluid into the fluid chamber 50a. After the pump shaft 28 completes the first stroke, the pump shaft member 28 transitions to a second stroke. During the transition, the movement of the fluid displacement member 26a is temporarily stopped, but the orientation of the first fluid port 38a and the second fluid port 40a maintains a swirling flow within the fluid chamber 50a during the transition. During the second stroke, the pump shaft member 28 drives the fluid displacement member 26a into the fluid chamber 50a, thereby reducing the volume of one of the fluid chambers 50a. Driving the fluid displacement member 26a into the fluid chamber 50a causes the inlet check valve 22a to close and the outlet check valve 24a to open. With the outlet check valve 24a open, the fluid displacement component 26a drives fluid out of the fluid chamber 50a through the second fluid port 40a and drives the fluid downstream through the outlet manifold 18.

The first fluid port 38a introduces fluid into the fluid chamber 50a at an angle of inclination relative to one of the inner surface 34a and the diaphragm 44a, which causes the fluid within the fluid chamber 50a to vortex. Additionally, the first fluid port 38a is positioned such that fluid entering the fluid chamber 50a avoids impacting the inner surface 34a and the diaphragm 44a. Preventing fluid from impinging inner surface 34a and diaphragm 44a maintains a desired fluid velocity in one of fluid chambers 50a, thereby preventing areas of low fluid velocity or fluid free velocity. Additionally, the first fluid port 38a is positioned proximate the circumferential edge 42a. Positioning the first inner aperture proximate the circumferential edge 42a promotes swirling around one of the fluid chambers 50a, thereby providing faster, more efficient flushing of the fluid chamber 50a as a solvent is pumped to flush the fluid chamber 50a.

The second fluid port 40a receives fluid from the fluid chamber 50a when the fluid is driven away from the fluid chamber 50a during the second stroke. Tilting angle with respect to one of the inner surface 34a and the diaphragm 44a The second fluid port 40a. The angle of inclination of the second fluid port 40a promotes swirling within the fluid chamber 50a throughout the pumping cycle (including the first stroke, the transition, and the second stroke). For example, unlike an exit port aligned with one of the shafts of the pump shaft member 28 (which would result in a decrease in one of the flow velocities resulting in undesirable flow characteristics and no flow velocity), approaching the circumferential edge of the inner surface 40a Positioning the second fluid port 30a at an oblique angle 42a can promote swirling and ensure that the flow has the desired characteristics. Positioning the second fluid port 40a at an oblique angle and near the circumferential edge 42a thus eliminates areas of low flow velocity or no flow velocity. Additionally, extending the second fluid port 40a proximate the circumferential edge 42a through the inner surface 34a further promotes maintaining a swirling flow around one of the fluid chambers 50a, thereby facilitating flushing of the fluid chamber 50a and preventing residual process fluid from depositing in the fluid chamber 50a. in.

The pump 10 is configured to drive a fluid, such as a coating, to a downstream application. After application of the fluid, the fluid chambers 50a and 50b must be flushed with a solvent or other cleaning fluid prior to storage or reuse. Both the flushing fluid chambers 50a and 50b maintain the useful life of the various components of the pump 10 and ensure the quality of a fluid (such as a coating of a different pigment) that is pumped. To flush the pump 10, the solvent is pumped through the fluid chambers 50a and 50b in the same manner as the other pumped fluids set forth above. The first fluid port 38a imparts a swirling flow to the solvent and prevents solvent from having a low velocity or no velocity when in the fluid chamber 50a. The swirling of the solvent prevents precipitation of the pumped fluid, such as a coating, within the fluid chamber 50a. Additionally, the constant velocity maintained in the fluid chamber 50a prevents solids, such as fillers and additives from the coating, from precipitating in the fluid chamber 50a. The second fluid port 40a is configured to maintain a swirling flow in the fluid chamber 50 during the transition and the second stroke. The second fluid port 40a receives the solvent and provides the solvent to the outlet manifold 18. Both the first fluid port 38a and the second fluid port 40a are disposed proximate the circumferential edge 42a of the inner surface 34a. Locating both the first fluid port 38a and the second fluid port 40a near the periphery of the inner surface 34a maintains a swirling flow around one of the fluid chambers 50a (and also near one of the perimeters of the diaphragm 44a). Maintaining swirling near the perimeter of one of diaphragm 44a and fluid chamber 50a facilitates flushing of fluid chamber 50a, thereby reducing the volume of solvent and the time required to flush fluid chamber 50a Both.

The configuration of the first fluid ports 38a and 38b and the second fluid ports 40a and 40b provides significant advantages. Positioning the first fluid port 38a and the second fluid port 40a at an oblique angle relative to the inner surface 34a and the diaphragm 44a facilitates rotational flow of solvent and facilitates flushing of the fluid chambers 50a and 50b, thereby reducing associated with the flushing pump 10. Material cost and time cost. Additionally, positioning both the first fluid port 38a and the second fluid port 40a near the circumferential edge 42a contributes to swirling at the periphery of one of the fluid chambers 50a. The swirling flow at the periphery of the fluid chamber 50a provides a faster, more efficient flushing of the fluid chamber 50a. The swirling flow at the periphery of the fluid chamber 50a removes the coating or other fluid disposed at the interface of the diaphragm 44a and the fluid cover 14a, and the interface of the diaphragm 44a with the fluid cover 14a is the most difficult portion of the conventional fluid chamber 50a. Having a faster, more efficient flush reduces both the volume of solvent required and the downtime required for flushing. Reducing the volume of solvent required can reduce the material cost associated with pump 10. In addition, reducing the downtime required to clean the pump 10 can increase the return on investment of the pump 10. In addition, the fluid cover 14a and 14b are replaceable to provide a cost savings to the end user since the end user only needs a single replacement fluid cover in the event that the fluid cover 14a or fluid cover 14b needs to be replaced.

Figure 2 is an elevational view of a fluid cover 14a. As discussed above, fluid cover 14a is substantially similar to fluid cover 14b. As such, the fluid cover 14a will be discussed in further detail, and the discussion of the fluid cover 14a also applies to the fluid cover 14b. The fluid cover 14a includes a cover body 32a, an inner surface 34a, a first fluid port 38a, a second fluid port 40a, a first check valve housing 52a, and a second check valve housing 54a. Inner surface 34a includes a circumferential edge 42a. The first fluid port 38a includes a first inner aperture 56a, a first outer aperture 58a, and a first flow path 60a. The second fluid port 40a includes a second inner aperture 62a, a second outer aperture 64a, and a second flow path 66a.

Cover body 32a extends between inner surface 34a and outer surface 36a (shown in Figure 1). Inner surface 34a is preferably a concave surface and outer surface 36a is preferably a convex surface. Point A is placed at the center of one of the inner surfaces 34a, and the inner surface 34a is along the axis A-A (shown in Figure 1). quasi. The first check valve housing 52a extends into the cover body 32 and is configured to receive the inlet check valve 22a (shown in Figure 1). Similar to the first check valve housing 52a, the outlet check valve housing extends into the cover body 32a and is configured to receive the outlet check valve 24a (shown in Figure 1).

The first fluid port 38a extends through the cover body 32a between the first check valve housing 52a and the inner surface 34a. The first flow path 60a extends between the first outer aperture 58a and the first inner aperture 56a. The first outer aperture 58a leads to the first check valve housing 52a and the first inner opening 56a opens to the inner surface 34a of the fluid cover 14a. The first inner opening 56a is disposed adjacent the circumferential edge 42a of the inner surface 34a at a radial distance R1 from one of the points A.

The second fluid port 40a extends through the cover body 32a between the second check valve housing 54a and the inner surface 34a. The second flow path 66a extends between the second outer aperture 64a and the second inner aperture 62a. The second outer aperture 64a leads to the second check valve housing 54a and the second inner opening 62a opens to the inner surface 34a of the fluid cover 14a. Similar to the first inner opening 56a, the second inner opening 62a is disposed adjacent the circumferential edge 42a of the inner surface 34a. The second inner opening 62a is disposed at a radial distance R2 from one of the points A. The radial distance R1 is approximately equal to the radial distance R2, and both R1 and R2 are preferably greater than one-half of the radial distance between the point A and the circumferential edge 42a. It should be understood that the first inner aperture 56a and the second inner aperture 62a can be positioned at any desired location on the inner surface 34a to tangential to the circumferential edge 42a and provide fluid to the angle of inclination relative to one of the inner surfaces 34a to Fluid chamber 50a. For example, the first inner aperture 56a can be disposed adjacent to the second inner aperture 62a, can be disposed opposite the second inner aperture 62a, or can be disposed relative to any other displacement angle of the second inner aperture 62a.

During a first stroke of a pump (such as the pump 10 shown in Figure 1), the first fluid port 38a provides fluid to a fluid chamber at least partially defined by the fluid cover 14a (such as shown in Figure 1) In the fluid chamber 50a). The first outer aperture 58a is configured to receive a fluid provided by a check valve housed in the first check valve housing 52a. The fluid flows through the first flow path 60a and through the first inner orifice 56a into the fluid chamber. The first inner aperture 56a is positioned on the inner surface 34a to be inclined at an angle relative to one of the inner surfaces 34a. Inflow. The angle of inclination imparts a swirling flow of fluid into the fluid chamber, as indicated by flow line F. The angle of inclination also prevents fluid from entering the fluid chamber through the first inner aperture 56a from impacting the inner surface 34a. The swirling of the fluid imparted into the fluid chamber promotes a constant flow velocity through the fluid chamber and particularly at one of the perimeters of one of the inner surfaces 34a, which facilitates efficient removal of solids and other residues from the fluid chamber. Additionally, directing fluid away from the first inner orifice 56a such that fluid does not impact the inner surface 34a prevents fluid from decelerating, thereby assisting in eliminating low velocity or no velocity regions and preventing solids and other residues from depositing within the fluid chamber.

After completing the first stroke, the pump transitions to a second stroke in which fluid is driven from the fluid chamber downstream. During the transition from the first stroke to the second stroke, the pump temporarily stops moving so that the diaphragm neither expands nor contracts the volume of the fluid chamber. During the transition, the positioning of the second inner aperture 62a and the first inner aperture 56a ensures that the rotational flow of fluid is maintained within the fluid chamber. Similar to the first inner aperture 56a, the second inner aperture 62a is positioned on the inner surface 34a at an oblique angle relative to one of the inner surfaces 34a. In addition, the second inner opening 62a is positioned on the inner surface 34a at a radial distance R2 approximately equal to the radial distance R1 such that the second inner opening 62a and the first inner opening 56a are disposed at approximately the same diameter from the point A. Towards the distance. Positioning the first inner aperture 56a and the second inner aperture 62a at approximately the same radial distance from point A ensures that the swirling flow imparted by the first inner aperture 56a is maintained throughout the pump cycle.

During the second stroke, the diaphragm is driven into the fluid chamber, thereby reducing the volume of the fluid chamber and driving the fluid downstream through the second fluid port 40a and the outlet check valve 24a. The orientation of the second inner aperture 62a relative to the inner surface 34a facilitates removal of fluid from the fluid chamber and any contaminants carried by the fluid. The orientation of the second inner aperture 62a also promotes swirling throughout the second stroke. Ensuring that the swirling flow continues throughout the pump cycle prevents solids from precipitating in the fluid chamber; thus, the positioning of the first inner orifice 56a and the second inner orifice 62a enhances flow characteristics within the fluid chamber.

3A is a side elevational view of one of the fluid covers 14a with the exposed first fluid port 38a. Figure 3B is a perspective view of one of the first fluid ports 38a. Figures 3A and 3B will be discussed together. The fluid cover 14a includes a cover body 32a, an inner surface 34a, a first fluid port 38a, and a second fluid port 40a. Inner surface 34a includes a circumferential edge 42a. The first fluid port 38a includes a first inner aperture 56a, a first outer aperture 58a, and a first flow path 60a. The second fluid port 40a includes a second inner bore 62a.

Cover body 32a extends between inner surface 34a and outer surface 36a (shown in Figure 1). Inner surface 34a is preferably a concave surface and outer surface 36a is preferably a convex surface. Inner surface 34a partially defines fluid chamber 50a. Fluid chamber 50a is defined between inner surface 34a and a fluid displacement component, such as diaphragm 44a shown in FIG. Point A is placed at the center of one of the inner surfaces that is aligned along axis A-A (shown in Figure 1). The first fluid port 38a extends through the cover body 32a with the first inner aperture 56a extending through the inner surface 34a. Similar to the first fluid port 38a, the outlet extends through the cover body 32a with the second inner aperture extending through the inner surface 34a. The first inner aperture 56a is positioned at a radial distance R1 from one of the points A, and the second inner aperture 62a is positioned at a radial distance R2 from one of the points A. Preferably, the radial distance R1 is approximately equal to the radial distance R2.

The first fluid port 38a provides a fluid to the fluid chamber 50a. The first inner bore 56a is positioned to provide a fluid flow into the fluid chamber 50a at an oblique angle relative to one of the inner surfaces 34a such that a fluid is imparted to the fluid chamber 50a. The first inner aperture 56a is positioned proximate the circumferential edge 42a of the inner surface 34a. Positioning the first inner aperture 56a proximate the circumferential edge 42a promotes swirling near the circumferential edge 42a. The first inner aperture 56a is thus positioned to drain any solid remaining near the circumferential edge 42a. When the swirling flow promotes the discharge of the fluid chamber 50a, the swirling flow also effectively prevents any solids from depositing in the fluid chamber 50a by ensuring that the fluid in the fluid chamber 50a continuously flows throughout the fluid chamber 50a throughout the pump cycle. Place, whether the pump is being pumped for application of one of the fluids (such as a coating) or a cleaning fluid (such as a solvent).

Similar to the first inner aperture 56a, the second inner aperture 62a is positioned at an oblique angle relative to one of the inner surfaces 34a. The second inner bore 62a is configured to maintain the fluid chamber 50a throughout the pump cycle The swirling flow of the fluid. Additionally, the second inner aperture 62a is disposed on the inner surface 34a at a radial distance R2 that is preferably approximately equal to the radial distance R1. Positioning the first inner aperture 56a and the second inner aperture 62a at approximately the same radial distance from the point A can propagate the swirling flow of the fluid in the fluid chamber 50a through the pump circulation such that the fluid chamber 50a does not form. Low speed or no speed zone. For example, an exit orifice that is different from the axis AA of the pump shaft member 28 (shown in Figure 1) (which would result in a decrease in flow velocity thereby creating undesirable flow characteristics and low flow velocity regions) The positioning of the second inner opening 62a at an oblique angle to the circumferential edge 42a of the inner surface 34a can promote swirling and ensure that the flow has the desired characteristics (including areas that eliminate low flow speed or no flow velocity).

In Figure 3B, the first fluid port 38a is shown separated from the fluid cover 14a. As discussed above, the second fluid port 40a is preferably mirrored by one of the first fluid ports 38a. As such, while the discussion of FIG. 3B is directed to the first fluid port 38a, it should be understood that the discussion of the first fluid port 38a is equally applicable to the second fluid port 40a. The first fluid port 38a includes a first flow path 60a extending between the first inner aperture 56a and the first outer aperture 58a. The first outer aperture 58a is configured to receive a fluid and provide the fluid to the first flow path 60a. The first inner bore 56a is configured to receive the fluid from the first flow path 60a and provide the fluid into the fluid chamber 50a.

The first inner bore 56a is configured to impart a rotational flow of fluid exiting the first inner bore 56a into the fluid chamber 50a. The first flow path 60a extends between the first outer aperture 58a and the first inner aperture 56a and enhances the flow characteristics of the fluid entering the fluid chamber 50a by imparting a swirl of fluid into the fluid chamber 50a. The first flow path 60a can extend helically between the first inner aperture 56a and the first outer aperture 58a such that the first flow path 60a can impart additional rotational flow to the fluid. However, it should be understood that the first flow path 60a can be in any suitable configuration (such as a straight path, a curved path, or any other desired configuration) for use in the first outer aperture 58a and the first inner aperture 56a. Supply fluid.

The first fluid port 38a and the second fluid port 40a create significant advantages. First fluid end Port 38a introduces fluid into fluid chamber 50a in a manner that produces a rotational movement of fluid within fluid chamber 50a. When a solvent or other cleaning solution is pumped through the fluid chamber 50a, the swirling of the fluid within the fluid chamber 50a enhances the cleaning of the pump. As stated above, the second fluid port 40a is preferably mirrored by one of the first fluid ports 38a. Similarly, the second fluid port 40a enhances cleaning of the pump as the orientation of the second fluid port 40a promotes swirling throughout the pumping cycle.

The orientation and positioning of the first fluid port 38a and the second fluid port 40a enhances the flow of fluid through the fluid chamber 50a, thereby enhancing residue removal from the fluid chamber 50a. The first fluid port 38a and the second fluid port 40a ensure a constant rapid fluid velocity throughout one of the fluid chambers 50a. Additionally, the first fluid port 38a and the second fluid port 40a contribute to the flow at one of the perimeters of the inner surface 34a, thereby enhancing flushing of the perimeter, which is typically the most difficult to flush portion of the fluid chamber 50a. The angle of inclination of the first inner aperture 56a facilitates swirling of fluid within the fluid chamber 50a and prevents fluid from impinging on the inner surface 34a (which will cause the fluid to slow down). The angle of inclination of the second inner aperture 62a further promotes vortexing by facilitating a swirling flow through the pumping cycle (including the first stroke, the transition, and the second stroke).

The first fluid port 38a and the second fluid port 40a reduce the volume of flushing material required to flush the fluid chamber 50a by providing a swirling flow to the fluid chamber 50a and maintaining a swirling flow through the through-lumbar cycle Faster rinse time. The use of less rinsing material reduces the material cost associated with rinsing the fluid chamber. The faster rinse time reduces the downtime of the pump required for flushing, allowing for a more efficient and efficient use of the pump.

While the invention has been described with respect to the preferred embodiments, the embodiments of the present invention may be modified in the form and details without departing from the spirit and scope of the invention.

14a‧‧‧Fluid cover

32a‧‧‧ Cover subject

34a‧‧‧ inner surface

38a‧‧‧First fluid port

40a‧‧‧Second fluid port

42a‧‧‧Circle edge

52a‧‧‧First check valve housing

54a‧‧‧Second check valve housing

56a‧‧‧First inner opening

58a‧‧‧First outer orifice

60a‧‧‧First flow path

62a‧‧‧Second inner orifice

64a‧‧‧Second outer orifice

66a‧‧‧Second flow path

A‧‧‧ points

F‧‧‧Flower line

R1‧‧‧radial distance

R2‧‧‧radial distance

Claims (20)

A pump comprising: a pump drive system; a first fluid displacement component disposed at a first end of the pump drive system; a first fluid cover attached to the pump a first end of the drive system, wherein the first fluid displacement component is fixed between the pump drive system and the first fluid cover, wherein the first fluid cover comprises: a first cover body, The first inner wall and a first outer wall are defined, wherein the first inner wall and the first fluid displacement member define a first fluid chamber; a first fluid port extends through the first cover body, wherein the first The fluid port includes a first inner bore extending through the first inner wall, wherein the first fluid port is configured to guide first pass through the first inner bore at a first angle of inclination relative to one of the inner walls Leading into the first fluid chamber; and a second fluid port extending through the first cover body, wherein the second fluid port includes a second inner opening extending through the first inner wall and configured to Leading at a second tilt angle relative to one of the first inner walls Passing through the second inner opening; and wherein the first inner opening is disposed at a first radial distance from one of the centers of the first inner wall and the second inner opening is disposed at one of the centers a second radial distance; an inlet manifold attached to the first fluid cover and configured to provide a fluid to the first fluid chamber through the first inlet; and an outlet manifold attached to The first fluid cover is configured to receive the fluid from the fluid chamber through the first outlet. The pump of claim 1, wherein the first fluid port further comprises: a first outer aperture configured to receive the pumped fluid from the inlet manifold; and a first flow path from the The first outer aperture extends to the first inner aperture. The pump of claim 2, wherein the second fluid port further comprises: a second outer aperture configured to provide the pumped fluid to the outlet manifold; and a second flow path Extending from the second outer aperture to the second inner aperture. The pump of claim 1, wherein the first radial distance is approximately equal to the second radial distance. A pump according to claim 1, wherein the first inner opening is disposed adjacent to a circumferential edge of the inner wall, and the second outer opening is disposed adjacent the circumferential edge of the inner wall. The pump of claim 5, wherein the first inner aperture is mirrored by one of the second inner apertures. The pump of claim 6, wherein the first fluid port is mirrored by one of the second fluid ports. The pump of claim 1, and further comprising: a second fluid displacement component disposed at a second end of the pump drive system; and a second fluid cover attached to the gang a second end of the PU drive system, wherein the second fluid displacement component is fixed between the second fluid cover and the second end of the pump drive system, wherein the second fluid cover comprises: a first a second cover body defined by a second inner wall and a second outer wall, wherein the second inner wall and the second fluid displacement member define a second fluid chamber; a third fluid port extending through the first a second cover body, wherein the third fluid port includes a third inner opening extending through the second inner wall and configured to pass the third inner opening at a third angle of inclination relative to the inner wall will Directed into the second fluid chamber by the pumped fluid; and a fourth fluid port extending through the second cover body, wherein the fourth fluid port includes a fourth inner bore extending through the second inner wall And positioned to guide the first through the fourth inner opening at a fourth angle of inclination relative to the second inner wall; and wherein the third inner opening is disposed at one of the centers from the second inner wall At a three radial distance, and the fourth inner aperture is disposed at a fourth radial distance from the center. The pump of claim 8, wherein: the first fluid displacement component comprises a first diaphragm; and the second fluid displacement component comprises a second diaphragm. A fluid cover for a pump, the fluid cover comprising: a cover body extending between a convex outer wall and a concave inner wall; a first fluid port extending through the body, wherein the fluid a fluid port includes: a first outer aperture; a first inner aperture extending through the concave inner wall; and a first flow path at the first outer aperture and the first inner aperture Extending therebetween; wherein the first inner aperture is positioned on the concave inner wall such that a pumped fluid is directed through the first inner aperture at a first angle of inclination relative to one of the concave inner walls; a second fluid port extending through the body and disposed opposite the first fluid port, wherein the second fluid port comprises: a second inner opening extending through the concave inner wall; a second outer opening ;and a second flow path extending between the second outer aperture and the second inner aperture; wherein the second inner aperture is positioned on the concave inner wall such that relative to the concave interior A second angle of inclination of the wall directs a pumped fluid through the second inner orifice. The fluid cover of claim 10, wherein the first inner opening is disposed at a first radial distance from a center of one of the concave inner walls, and wherein the second inner opening is disposed within the concave shape One of the centers of the wall is at a second radial distance. The fluid cover of claim 11, wherein the first radial distance is approximately equal to the second radial distance. A fluid cover according to claim 10, wherein the first inner opening is disposed adjacent a circumferential edge of the concave inner wall, and wherein the second inner opening is disposed adjacent the circumferential edge of the concave inner wall. The fluid cover of claim 13, wherein the first inner aperture is mirrored by one of the second inner apertures. A method of rinsing a fluid chamber, the method comprising: drawing a fluid through a first internal orifice into a fluid chamber defined between a fluid cover and a fluid displacement component, wherein the first inner orifice is positioned Providing the fluid to the fluid chamber at a first angle of inclination relative to one of the inner walls of the fluid cover, thereby imparting a rotational movement of the fluid into the fluid chamber; and driving the fluid through positioning to receive a second inner orifice of the fluid circulating within the fluid chamber exits the fluid chamber, wherein the second inner bore is positioned on the inner wall to direct the second angle of inclination relative to one of the inner walls fluid. The method of claim 15 wherein the fluid displacement component comprises a membrane. The method of claim 15, wherein the first inner aperture is disposed proximate to a circumferential edge of the inner wall and the second inner aperture is disposed proximate to a circumferential edge of the inner wall. The method of claim 17, wherein the first inner aperture is tangential to a circumferential edge of the fluid chamber to provide the fluid to the first fluid chamber. The method of claim 15, wherein the first inner opening is disposed at a first radial distance from one of the centers of the inner wall, and the second inner opening is disposed at one of the centers from the inner wall The second radial distance. The method of claim 15, wherein the first tilt angle is positioned such that the pumped fluid entering the fluid chamber through the first inner aperture does not impact the inner wall or the fluid displacement component.