CN219412879U

CN219412879U - Pump assembly

Info

Publication number: CN219412879U
Application number: CN202320390665.2U
Authority: CN
Inventors: 弗洛里安·绍尔; 托比亚斯·德梅尔迈尔
Original assignee: Husqvarna AB
Current assignee: Husqvarna AB
Priority date: 2022-03-03
Filing date: 2023-03-02
Publication date: 2023-07-25
Anticipated expiration: 2033-03-02
Also published as: CN116696758A; EP4239203A1

Abstract

The present disclosure relates to a pump assembly comprising: a pump housing containing an impeller device driven by a drive motor, wherein the drive motor is adapted to drive fluid at an inlet of the modular pump assembly upstream of a pressure chamber in a main flow direction of the fluid, and wherein an inlet opening, an outlet opening and a discharge opening are defined in the pump housing; a drain plug adapted to engage the drain opening; and a fluid passage starting at the outlet opening; wherein the bleed plug comprises: a first plug element having a first cross-sectional area, a second plug element having a second cross-sectional area, wherein the second plug element is coupled to the first plug element by a coupling rod, and wherein the third cross-sectional area of the coupling rod is less than the first cross-sectional area and the second cross-sectional area; the coupling rod is thereby located in the fluid channel, wherein fluid can flow around the coupling rod and through the coupling rod. The pump assembly of the present disclosure is advantageously provided with a one-piece drain plug for draining the entire pump assembly.

Description

Pump assembly

Technical Field

The present disclosure relates to a pump assembly and, more particularly, to a structure of a bleed plug for use with a pump assembly.

Background

Pump assemblies are often required to operate in cold environments. When the pump assembly may be stopped for normal or abnormal reasons, it may be necessary to drain water out of the pump assembly to prevent damage to the pump assembly from chilled water. Thus, the pump assembly may need to include a bleed structure.

An example of such a pump assembly is provided in chinese patent 2,826,032 (hereinafter' 032 reference). The' 032 reference provides a pump having a bleed valve arrangement. The nut is sealed and welded to one side of the pump housing. An O-shaped sealing ring is sleeved on the drain plug. The drain plug is sealed by an O-ring seal and threaded into the nut, and an internally threaded plug is threaded onto the drain pipe. The screw plug screws (equivalent to closing the faucet and acting as a seal), unscrews (equivalent to opening a portion of the faucet switch and acting as a slow drain), and unscrews (equivalent to fully opening the faucet switch to quickly drain). The head of the inner plug is tapered and the discharge port on the wall of the water inlet chamber of the pump housing is in sealing contact. The outlet end of the drain plug is a groove and an O-ring is embedded in the groove for sealing contact with the wall of the internally threaded plug to prevent leakage. However, there remains a need for a simple, quick and easy to install drain structure.

Disclosure of Invention

In view of the above, it is an object of the present utility model to solve or at least mitigate the above discussed drawbacks. This object is at least partially achieved by a pump assembly. The pump assembly includes: a pump housing accommodating an impeller device driven by a drive motor, wherein the drive motor is adapted to drive fluid at an inlet of the modular pump assembly upstream of a pressure chamber in a main flow direction of the fluid, and wherein an inlet opening, an outlet opening and a discharge opening are defined in the pump housing; a drain plug adapted to engage the drain opening; and a fluid passage starting from the outlet opening; the pump assembly is characterized in that the bleed plug comprises: a first plug element having a first cross-sectional area, a second plug element having a second cross-sectional area, wherein the second plug element is coupled to the first plug element by a coupling rod, and wherein a third cross-sectional area of the coupling rod is less than the first cross-sectional area and the second cross-sectional area; whereby the coupling rod is located within the fluid channel, wherein fluid is able to flow around and through the coupling rod.

Thus, the pump assembly of the present disclosure is advantageously provided with a one-piece drain plug for draining the entire pump assembly. The bleed plug is simple, quick and easy to install in the bleed opening of the pump assembly. Because of the small cross-sectional area of the coupling rod, the coupling rod does not restrict the flow of water too much, even if it is located in the water channel. Water can flow around and through the coupling rod. Therefore, the drain plug does not excessively obstruct the flow of water. The cross-sectional area of the coupling rod may even be minimized so that it constitutes only a rigid wire coupling the first plug and the second plug together.

According to an embodiment of the present disclosure, the drain opening is coupled with a first adapter. The drain plug is sealably coupled to the drain opening via the first adapter. The adapter also advantageously couples the conduit on the pressure side of the pump assembly with the discharge opening.

According to an embodiment of the present disclosure, a pressure tank unit is mechanically coupled to the drain opening via the fluid channel. The pump assembly is advantageously connected to the pressure tank unit. The pressure tank unit may supplement the pumping operation of the pump assembly. Furthermore, the pressure tank unit may allow the drive motor of the pump assembly to be turned off while still maintaining the pressure required to perform various household and industrial operations.

According to an embodiment of the present disclosure, the outlet opening is adapted to engage with a check valve. The check valve may be used to maintain pressure on the pressure side of the pump assembly even when the pump assembly is not operating.

According to an embodiment of the present disclosure, the first cross-sectional area is smaller than the second cross-sectional area. According to an embodiment of the present disclosure, the first cross-sectional area is equal to the second cross-sectional area. The flexibility of the dimensions or cross-sections of the first and second plug elements can be used for different known sized pipes or adapters of the plug without concern for water leakage and pressure loss, particularly towards the pressure side of the pump assembly.

According to an embodiment of the present disclosure, the first plug element and the second plug element comprise threads. The threads may allow for a simple and secure coupling between the drain plug and the adapter or between the drain plug and the tubing of the pump assembly.

According to an embodiment of the present disclosure, the drain plug comprises a head element for inserting the drain plug into the drain opening and removing the drain plug from the drain opening. The head element may be used as a handle for holding the tap holder and moving it in or out of the drain opening.

According to an embodiment of the present disclosure, the drive motor is disposed within the pump housing.

According to an embodiment of the present disclosure, the fluid channel is a water channel.

Thus, the pump assembly of the present disclosure is advantageously provided with a one-piece drain plug for draining the entire pump assembly.

Other features and aspects of the present utility model will become apparent from the following description and the accompanying drawings.

Drawings

The utility model will be described in more detail with reference to the accompanying drawings, in which:

FIG. 1 illustrates a schematic diagram of a pump assembly having a pressure tank unit according to one aspect of the present disclosure;

FIG. 2 illustrates a cross-sectional view of a pump assembly integrated with a bleed plug in accordance with an aspect of the present disclosure; and

fig. 3 illustrates a cross-sectional view of a bleed plug in accordance with an aspect of the present disclosure.

Detailed Description

The present utility model will be described more fully hereinafter with reference to the accompanying drawings, in which exemplary embodiments of the utility model are shown, in which one or more aspects of the utility model are incorporated. This utility model may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the utility model to those skilled in the art. For example, one or more aspects of the present utility model may be used in other embodiments and may even be used in other types of structures and/or methods. In the drawings, like numbering represents like elements.

Certain terminology is used herein for convenience only and is not to be taken as a limitation on the present utility model. For example, "upper", "lower", "front", "rear", "side", "longitudinal", "lateral", "transverse", "upward", "downward", "forward", "rearward", "sideways", "left", "right", "horizontal", "vertical", "upward", "inner", "outer", "inward", "outward", "top", "bottom", "upper", "above", "lower", "central", "intermediate", "middle", "intermediate", "end", "adjacent", "near", "distal", "remote", "radial", "circumferential", etc. describe only the configuration shown in the figures. In fact, the components may be oriented in any direction and the terminology, therefore, should be understood as encompassing such variations unless specified otherwise.

Fig. 1 and 2 illustrate a pump assembly 100. The pump assembly 100 may be used for irrigation, water supply, sewage removal, and other household and industrial applications. The pump assembly 100 includes a pump housing 110. The pump housing 110 houses an impeller device driven by a drive motor 112 arranged within the pump housing 110, wherein the drive motor 112 is adapted to drive fluid at an inlet of the modular pump assembly 100 upstream of a pressure chamber in a main flow direction of the fluid. The pump housing 110 also includes an inlet opening 114, an outlet opening 116, and a drain opening 118. The inlet opening 114 is provided on the suction side P1 of the pump housing 110. Water from a water source (not shown) may enter the inlet opening 114 of the pump housing 110 due to the pumping action of an impeller (not shown) housed in the pump housing 110. Furthermore, an outlet opening 116 is provided on the pressure side P2 of the pump housing 110. Pressurized water from the pump housing 110 may be used for various household and industrial applications. The outlet opening 116 (shown in fig. 2) extends by means of the first duct X1 and the second duct X2 to provide multiple applications simultaneously. Further, the first conduit X1 is coupled to the outlet opening 116 using the second adapter 160.

The bleed openings 118 may be used to bleed in use or in a deactivated condition. Further, the drain opening 118 may prevent damage to the pump assembly 100 due to chilled water when the pump assembly 100 is stopped for normal or abnormal reasons during operation in a cold environment. The drain opening 118 (shown in fig. 2) extends by means of a third pipe X3 and a fourth pipe X4. The third conduit X3 is coupled to the drain opening 118 using the first adapter 130. Further, the third pipe X3 and the fourth pipe X4 are connected to each other via a fifth pipe X5. The fifth pipe X5 is coupled to the first pipe X1. The first, second, third, fourth, fifth, and sixth conduits X1, X2, X3, X4, X5, and X6 may be coupled to one another by any means known and understood in the art without limiting the scope of the present disclosure in any way.

With continued reference to fig. 1 and 2, the drain plug 120 is adapted to engage the drain opening 118. The bleed plugs 120 extend across the first adapter 130, the third pipe X3, the fourth pipe X4, and the fifth pipe X5. The drain plug 120 may prevent water from leaking from the drain opening 118 when draining through the pump assembly 100 is not required.

The bleed plug 120 (shown in fig. 2 and 3) includes a first plug element 120A having a first cross-sectional area A1 and a second plug element 120B having a second cross-sectional area A2. The second plug element 120B is coupled to the first plug element 120A by a coupling rod 120C. The third cross-sectional area A3 of the coupling rod 120C is smaller than the first cross-sectional area A1 and the second cross-sectional area A2.

In some embodiments, as shown in fig. 2 and 3, the first cross-sectional area A1 may be smaller than the second cross-sectional area A2. In some embodiments, the first cross-sectional area A1 may be equal to the second cross-sectional area A2. The flexibility of the dimensions or first cross-sectional area A1 of the first plug element 120A and the dimensions or second cross-sectional area A2 of the second plug element 120B, respectively, can generally be used to plug different known sized pipes or adapters without concern for water leakage and pressure loss, particularly on the pressure side P2 of the pump assembly 100.

Further, the drain plug 120 comprises a head element 120D for inserting the drain plug 120 into the drain opening 118 and for removing the drain plug from the drain opening, the drain plug extending across the first adapter 130, the third conduit X3, the fourth conduit X4 and the fifth conduit X5. The head member 120D may be used as a handle for grasping and moving the drain plug 120 into or out of the drain opening 118. In addition, the fourth cross-sectional area A4 of the head member 120D is greater than the cross-sectional area of the fourth conduit X4. The head member 120D remains located outside the fourth conduit X4 and is readily accessible as a handle for gripping and moving the drain plug 120.

Furthermore, the coupling rod 120C does not restrict the flow of water too much due to the smaller cross-sectional area. The water flowing from the sixth pipe X6 may flow around the coupling rod 120C. Water may flow around the coupling rod 120C and from the sixth conduit X6 through the fifth conduit X5. The coupling rod 120C does not excessively obstruct the flow of water and allows the water flow to easily flow from the sixth pipe X6 to the fifth pipe X5. Thus, even when the drain plug 120 is in place, the shape of the drain plug 120 allows for an efficient fluid coupling between the fifth pipe X5 and the sixth pipe X6 according to the usage requirements.

When the bleed plug 120 is completely or partially removed from the bleed opening 118 by gripping the head element 120D, the bleed plug 120 connects the suction side P1 and the pressure side P2 of the pump assembly 100 via the outlet opening 116 and the bleed opening 118. Further, in this position, the drain plug 120 allows water to drain from the pump assembly 100.

The drain plug 120 including the first plug element 120A, the second plug element 120B, the coupling rod 120C, and the head element 120D is formed as a single piece of drain plug 120. In some embodiments, the elements of the bleed plug 120 may be manufactured separately and then operatively inserted into the bleed opening 118 after being coupled to one another by an adhesive or any other means known in the art. In some embodiments, the drain plug 120 is manufactured as one integral component by a molding process. Further, the first plug element 120A, the second plug element 120B, the coupling rod 120C, and the head element 120D of the drain plug 120 may be made of any suitable material known in the art. In some embodiments, the materials of the first plug member 120A, the second plug member 120B, the coupling rod 120C, and the head member 120D may be the same. In some embodiments, the materials of the first plug member 120A, the second plug member 120B, the coupling rod 120C, and the head member 120D may be different.

Further, as shown in fig. 2, the first plug element 120A is sealably coupled with the first adapter 130 by means of a groove on an outer surface of the first plug element 120A, and the second plug element 120B is sealably coupled with the fourth pipe X4 by means of a groove (not shown) on an outer surface of the second plug element 120B. The sealable coupling between the first plug element 120A and the first adapter 130 may be achieved by means of a sealing element 170. Similarly, sealable coupling between the second plug element 120B and the fourth conduit X4 may be achieved by means of a sealing element 170'. The sealing elements 170, 170' may be selected from one or more of O-rings, gaskets, and any other similar sealing elements suitable for use with aspects of the present disclosure. Furthermore, the sealing elements 170, 170' may be the same or different, depending on the application requirements of the present disclosure.

In some embodiments, the first plug element 120A and the second plug element 120B of the drain plug 120 may include threads (not shown) on respective outer surfaces. The threads may allow for a simple and secure coupling between the drain plug 120 and the first adapter 130 or between the drain plug 120 and the fourth pipe X4.

With continued reference to fig. 1 and 2, a pressure tank unit 140 is coupled to the drain opening 118. The pressure tank unit 140 includes a pressure tank 142 and a pressure sensor 144. The pressure tank unit 140 is coupled to the drain opening 118 through a water passage formed by the third pipe X3, the fifth pipe X5, and the sixth pipe X6. Thus, upon complete or partial removal of the bleed piston 120 from the bleed opening 118, the third conduit X3 is mechanically coupled to the bleed opening 118, while the bleed piston 120 is sealingly fitted to the pump and mechanically and fluidly coupled to the bleed opening 118. Further, the third conduit X3 is mechanically and fluidly coupled to the fifth conduit X5 and the sixth conduit X6. The pressure sensor 144 may be a pressure switch or any other pressure sensor 144 known and understood in the art, and is not intended to limit the scope of the present disclosure in any way. The pressure tank unit 140 may supplement the pumping operation of the pump assembly 100. In addition, the pressure tank unit 140 may allow the drive motor 112 of the pump assembly 100 to be turned off while still maintaining the pressures required to perform various household and industrial operations.

Further, the check valve 150 is adapted to engage with the outlet opening 116. The check valve 150 advantageously extends from the second adapter 160 towards the first conduit X1. The check valve 150 prevents the pressure tank 142 from venting when the drive motor 112 of the pump assembly 100 is turned off. The check valve 150 may be used to maintain pressure on the pressure side P2 of the pump assembly 100 even when the pump assembly 100 is not operating.

Accordingly, the pump assembly 100 of the present disclosure advantageously provides a one-piece bleed plug 120 for evacuating the entire pump assembly 100. The bleed plugs 120 are simple, quick and easy to install in the bleed openings 118 of the pump assembly 100.

In the drawings and specification, there have been disclosed preferred embodiments and examples of the utility model and, although specific terms are employed, they are used in a generic and descriptive sense only and not for purposes of limitation, the scope of the utility model being set forth herein.

List of elements:

100. pump assembly

110. Pump housing

112. Driving motor

114. Inlet opening

116. Outlet opening

118. Drain opening

120. Drain plug

120A first plug element

120B second plug element

120C connecting rod

120D head element

130. First adapter

140. Pressure tank unit

142. Pressure box

144. Pressure sensor

150. Check valve

160. Second adapter

170. 170' sealing element

A1 First cross-sectional area

A2 Second cross-sectional area

A3 Third cross-sectional area

A4 Fourth cross-sectional area

P1 suction side

P2 pressure side

X1 first pipeline

X2 second pipeline

X3 third pipeline

X4 fourth pipeline

X5 fifth pipeline

X6 sixth conduit.

Claims

1. A pump assembly, comprising:

a pump housing (110) housing an impeller device driven by a drive motor (112),

wherein the drive motor (112) is adapted to drive the fluid at the inlet of the modular pump assembly (100) upstream of the pressure chamber in the main flow direction of the fluid, and wherein

Defining an inlet opening (114), an outlet opening (116) and a drain opening (118) in the pump housing (110);

-a drain plug (120) adapted to engage with the drain opening (118); and

-a fluid passage starting from the outlet opening (116);

the method is characterized in that:

the drain plug (120) includes:

a first plug element (120A) having a first cross-sectional area (A1),

a second plug element (120B) having a second cross-sectional area (A2), wherein,

the second plug element (120B) is coupled to the first plug element (120A) by a coupling rod (120C), and

wherein a third cross-sectional area (A3) of the coupling rod (120C) is smaller than the first cross-sectional area (A1) and the second cross-sectional area (A2);

whereby the coupling rod (120C) is located within the fluid channel, wherein fluid can flow around the coupling rod (120C) and through the coupling rod (120C).

2. The pump assembly of claim 1, wherein the bleed opening (118) is coupled with a first adapter (130).

3. The pump assembly of claim 1, wherein a pressure tank unit (140) is mechanically coupled to the drain opening (118) via the fluid passage.

4. A pump assembly according to any one of claims 1 to 3, wherein the outlet opening (116) is adapted to engage with a check valve (150).

5. A pump assembly according to any one of claims 1 to 3, wherein the first cross-sectional area (A1) is smaller than the second cross-sectional area (A2).

6. A pump assembly according to any one of claims 1 to 3, wherein the first cross-sectional area (A1) is equal to the second cross-sectional area (A2).

7. A pump assembly according to any one of claims 1 to 3, wherein the first plug element (120A) and the second plug element (120B) comprise a thread.

8. A pump assembly according to any one of claims 1 to 3, wherein the drain plug (120) comprises a head element (120D) for inserting the drain plug into the drain opening (118) and removing the drain plug from the drain opening.

9. The pump assembly of claim 1, wherein the drive motor is disposed within the pump housing (110).

10. The pump assembly of claim 1, wherein the fluid channel is a water channel.