Exhaust valve and water pump comprising an exhaust valve

Abstract

The utility model relates to an exhaust valve for water pump. Including valve body, limit entrance, export and passage, valve body is made of flexible material, valve body includes limiting portion and joint part, is configured as when exhaust valve is assembled to water pump, forms sealed joint with the shell of water pump. Exhaust valve still includes abutting piece, it can move between the first position and second position of passage. In the first position, the abutting piece is in contact with the limiting portion to prevent the abutting piece from falling out of the passage, in the second position, the abutting piece abuts the export. The abutting piece is configured to be adjacent to the first position initially when the water pump starts, so that the gas entering the passage through the inlet is discharged from the outlet through the passage, and after the gas is discharged, in response to the pressure of the fluid entering the passage through the inlet, it moves to the second position to block the fluid from being discharged from the outlet. The exhaust valve uses a small number of components, has a simple structure and is easy to install, and the valve body is made of flexible material, without additional sealing elements. A water pump comprising the exhaust valve is also provided.

Description

Technical Field

[0001] This utility model relates to the field of water pump technology, and more specifically, to an air vent valve for a water pump and a water pump including the air vent valve. Background Technology

[0002] A water pump is a mechanical device used to transport liquids or increase their pressure. Its core working principle is: the rotating impeller performs work on the liquid, throwing it towards the outlet, thus creating a low-pressure zone at the pump inlet. Driven by the pressure difference between the inlet low pressure and the source liquid surface pressure (usually atmospheric pressure), the liquid is continuously forced into the pump, then accelerated and pressurized by the impeller before being discharged. If gas is present in the pump chamber and suction pipe, due to its high compressibility and density much lower than that of the liquid, the impeller rotation can only drive turbulent gas flow, failing to create a sufficient pumping pressure differential. This phenomenon is called "air binding," which will cause the water pump to run dry and unable to transport the medium. To eliminate this problem, an air vent valve is installed at the highest point of the system. Its function is to automatically discharge accumulated gas before pump start-up and during operation, ensuring that the pump chamber and pipes are completely filled with liquid, establishing normal working conditions for the impeller, thereby ensuring smooth pump start-up and the establishment of the required pressure differential.

[0003] Existing exhaust valves typically consist of four parts: a plastic valve cover, a plastic valve body, a sealing ring, and a steel ball. This multi-part, modular structure leads to cumbersome installation procedures and low installation efficiency. Furthermore, the cost of molding the plastic parts is substantial. Utility Model Content

[0004] In order to solve one or more of the above-mentioned problems in the prior art, various embodiments of the present invention provide an exhaust valve and a water pump including the exhaust valve.

[0005] A vent valve for a water pump according to one aspect of the present invention includes: a valve body defining an inlet, an outlet, and a channel communicating the inlet and the outlet, the valve body being made of a flexible material, the valve body including a limiting portion disposed adjacent to the channel; and a connecting portion configured to form a sealing engagement with the housing of the water pump when the vent valve is assembled to the water pump; and an abutment disposed within the channel and movable between a first position and a second position in the channel, wherein at the first position the abutment contacts the limiting portion to prevent the abutment from falling out of the channel, and at the second position the abutment abuts the outlet, wherein the abutment is configured, at the initial start-up of the water pump, adjacent to the first position, such that gas entering the channel from the inlet is discharged from the outlet via the channel, and after the gas is discharged, in response to the pressure of fluid entering the channel from the inlet, moves to the second position to block the fluid from being discharged from the outlet.

[0006] In one embodiment, a gap is formed between the abutment and the sidewall of the channel so that, at the initial start of the water pump, the gas entering the channel from the inlet is discharged from the outlet through the gap.

[0007] In one embodiment, the abutment includes a circumferential protrusion formed on the upper surface of the valve body.

[0008] In one embodiment, the channel has a tapered structure that tapers towards the exit near the exit.

[0009] In one embodiment, the limiting portion includes a limiting rib extending radially inward from the sidewall of the channel.

[0010] In one embodiment, the upper surface of the valve body is provided with a boss, the outlet is formed on the boss, the boss is sized to pass through the opening of the housing and be exposed outside the housing when the vent valve is assembled to the water pump, and the outer wall of the boss includes a radially outwardly extending lip configured to prevent the vent valve from falling into the housing.

[0011] In one embodiment, the flexible material comprises rubber.

[0012] The vent valves of various embodiments of this utility model use a valve body and an abutment to release accumulated gas during the initial startup of the water pump, ensuring that the pump chamber and pipeline are completely filled with liquid, and successfully preventing the liquid in the pump chamber from being discharged after the gas is released. Therefore, compared with the existing four-component vent valves, the vent valves of various embodiments of this utility model use only a fewer number of components, have a simple structure, are easy to install, and have lower manufacturing costs. In addition, the valve body of the vent valve of various embodiments of this utility model is made of flexible material, so a sealing connection can be achieved between the valve body itself and the water pump housing without the need for additional sealing components.

[0013] According to another aspect of the present invention, a water pump includes a housing and an exhaust valve as described in the above embodiments, which is assembled to the housing. Attached Figure Description

[0014] Embodiments are illustrated and explained with reference to the accompanying drawings. These drawings are used to illustrate the basic principles and thus only show aspects necessary for understanding the basic principles. These drawings are not to scale. In the drawings, the same reference numerals denote the same or similar features.

[0015] Figure 1 A schematic diagram of an exemplary water pump according to an embodiment of the present invention is shown.

[0016] Figure 2 A partially enlarged view of an exemplary water pump according to an embodiment of the present invention is shown.

[0017] Figure 3 A cross-sectional view of an exemplary exhaust valve according to an embodiment of the present invention is shown.

[0018] Figure 4 A schematic diagram of an exemplary exhaust valve according to an embodiment of the present invention is shown, wherein the abutment member is in a first position.

[0019] Figure 5 A schematic diagram of an exemplary exhaust valve according to an embodiment of the present invention is shown, wherein the abutment member is in a second position. Figure Labels 10. Water pump; 11. Air vent valve; 12. Housing. 121 Pump inlet, 122 Pump outlet, 123 Pump cover, 124 Pump casing, 125 Opening; 112 Valve body, 1121 Inlet, 1122 Outlet, 1123 Channel, 1124 Limiting part, 1125 Gap, 1126 Joint, 1127 Upper surface, 1128 Boss, 1129 Lip, 114 Abutting part. Detailed Implementation

[0020] The implementation and use of the embodiments are discussed in detail below. However, it should be understood that the specific embodiments discussed are merely illustrative of specific ways of implementing and using the present invention, and are not intended to limit the scope of the present invention. In the description, the structural positions of the various components, such as upper, lower, top, bottom, etc., are not absolute but relative. These directional descriptions are appropriate when the various components are arranged as shown in the figures, but these directional descriptions also change accordingly when the positions of the various components in the figures change.

[0021] This invention discloses an air vent valve for a water pump, which, through the use of a valve body and an abutment, discharges accumulated gas during the initial startup of the water pump and prevents liquid from draining from the pump chamber after the gas is discharged. The valve body is made of a flexible material, thereby achieving a sealed connection between the valve body and the pump housing. The air vent valves of various embodiments of this invention are applicable to various types of water pumps that require the discharge of accumulated gas during initial startup, and are particularly suitable for metal-cased water pumps.

[0022] The following will use a submersible pump as an example and for reference. Figures 1 to 5 The various embodiments of this utility model will be described in detail below.

[0023] An exemplary water pump 10 includes a housing 12 and an exhaust valve 11 mounted to the housing 12. The housing 12 defines a pump inlet 121, a pump outlet 122, and a fluid passage (not shown) connecting the pump inlet 121 and the pump outlet 122. Components (not shown), such as a motor and an impeller, may be arranged within the housing 12. When the water pump 10 is operating, its rotating impeller performs work on the fluid, creating a low-pressure zone at the pump inlet 121, thereby generating a pressure difference between the inlet and the fluid source, driving the fluid to continuously flow in. The inflowing fluid gains a significant amount of kinetic energy as it passes through the impeller and then enters the fluid passage. Within this passage, the fluid velocity decreases, and its kinetic energy is effectively converted into pressure energy (i.e., pressurization). Finally, the pressurized fluid is discharged through the pump outlet 122.

[0024] In some embodiments, the housing 12 of the water pump 10 may include a pump casing 124 and a pump cover 123 mounted on the pump casing 124. An exhaust valve 11 may be disposed on the pump cover 123, such as... Figure 1 As shown in the diagram; or it can be installed on the pump housing 124. The vent valve 11 is used to discharge the gas accumulated in the pump chamber and pipeline at the initial start of the water pump 10, and can prevent the discharge of liquid in the pump chamber after the gas is discharged.

[0025] The vent valve 11 includes a valve body 112 and an abutment 114. The valve body 112 defines an inlet 1121, an outlet 1122, and a passage 1123 communicating between the inlet 1121 and the outlet 1122. The valve body 112 includes a limiting portion 1124 disposed adjacent to the passage 1123. The valve body 112 also includes a connecting portion 1126 for forming a sealing engagement with the housing 12 when the vent valve 11 is assembled to the housing 12. In some embodiments, the housing 12 of the water pump 10 may include an opening 125, and the valve body 112 may be assembled to the opening 125 of the housing 12. After assembly, at least a portion of the valve body 112 is located within the housing 12, and its outlet 1122 is exposed to the outside through the opening 125 of the housing 12 to allow gas to be released.

[0026] The abutment 114 is disposed within the channel 1123 and is movable between a first position and a second position within the channel 1123. In the first position, the abutment 114 contacts the limiting portion 1124, which prevents the abutment 114 from falling out of the channel. Figure 4 As shown. In the second position, the abutment 114 abuts against the outlet 1122 to prevent, for example, fluid from discharging from the outlet 1122, such as... Figure 5 As shown.

[0027] When the water pump 10 is not started, the abutment member 114 is normally located in the first position due to factors such as gravity, that is, the abutment member 114 is in contact with the limiting part 1124. At the initial start-up of the water pump 10, gas accumulated in the pump chamber and pipeline enters the channel 1123 through the inlet 1121 of the exhaust valve 11. Depending on the mass of the abutment member 114 itself and / or the pressure of the gas entering the channel 1123 through the inlet 1121, the abutment member 114 may be in the first position, or float to some extent and be located near the first position, or bounce around the first position. Since the abutment member 114 is not in contact with the outlet 1122, the gas entering the channel 1123 can be discharged from the outlet 1122 through the channel 1123. In some embodiments, a gap 1125 may be formed between the abutment 114 and the sidewall of the channel 1123, through which gas entering the channel 1123 from the inlet 1121 can be discharged from the outlet 1122 to achieve the exhaust function.

[0028] After the gas accumulated in the pump chamber and pipeline is expelled, the impeller operates normally, allowing the water pump to run smoothly. The pressurized fluid in the pump chamber enters the channel 1123 from the inlet 1121 of the exhaust valve 11. In response to the pressure of the fluid entering the channel 1123, the abutment member 114 moves to the second position, abutting the outlet 1122, thereby preventing the fluid from being discharged further from the outlet 1122.

[0029] In some embodiments, the valve body 112 may be made of a flexible material, such as rubber or other suitable flexible materials.

[0030] In some embodiments, the channel 1123 near the outlet 1122 may be designed to taper towards the outlet, such as a conical structure or a flared structure. This design reduces the bouncing phenomenon at the outlet 1122 after the abutment 114 moves to the second position, thereby improving the abutment effect.

[0031] In some embodiments, the abutment 114 may be spherical or other suitable in shape. It may be made of, for example, a metallic material. For example, when a metal ball is used as the abutment 114, when the abutment 114 moves to the second position, it can form a good sealing abutment with the outlet 1122 at the tapered structure of the channel 1123.

[0032] In some embodiments, the limiting portion 1124 may include at least one limiting rib extending radially inward from the sidewall of the channel 1123.

[0033] In some embodiments, the engagement portion 1126 may include a circumferential protrusion formed on the upper surface 1127 of the valve body 112. When the exhaust valve 11 is assembled to the housing 12, the circumferential protrusion engages the inner surface of the housing 12, thereby forming a seal. In other embodiments, the engagement portion 1126 may be the upper surface 1127 of the valve body 112 itself. When the housing 12 of the water pump 10 is made of a rigid material such as metal, the engagement portion 1126 of the valve body 112, made of a flexible material, can form a better sealing engagement with the housing 12 of the water pump 10.

[0034] In some embodiments, the upper surface 1127 of the valve body 112 may be provided with a boss 1128. An outlet 1122 may be formed on the boss 1128. The size of the boss 1128 can be designed such that when the exhaust valve 11 is assembled to the opening 125 of the housing 12, the boss 1128 is adapted to protrude from the opening 125 and be exposed outside the housing 12. In addition, the outer wall of the boss 1128 may include a radially outwardly extending lip 1129. When the exhaust valve 11 is assembled, even if the exhaust valve 11 falls toward the housing 12 due to forces such as gravity, the lip 1129 can abut against the housing 12 around the opening 125, thereby preventing the exhaust valve 11 from falling further into the housing 12, thereby improving the ease of installation.

[0035] Understandable Figures 1 to 5 The embodiments shown only illustrate and label the main implementation units or components of the exhaust valve and the water pump including the exhaust valve according to the present invention. The shape and arrangement of each unit or component are only schematic and not limiting. Other shapes and sizes of units or components may be adopted in the exhaust valve and the water pump including the exhaust valve without departing from the spirit and scope of the present invention.

[0036] The technical content and features of this utility model have been disclosed above. However, it is understood that, under the creative concept of this utility model, those skilled in the art can make various changes and improvements to the disclosed concept, all of which fall within the protection scope of this utility model. The description of the above embodiments is illustrative rather than restrictive, and the protection scope of this utility model is determined by the claims.

Claims

1. An air vent valve for a water pump, characterized in that, The exhaust valve includes: A valve body defining an inlet, an outlet, and a passage connecting the inlet and the outlet, the valve body being made of a flexible material, the valve body comprising: A limiting part is disposed adjacent to the channel; The joint is configured to form a sealing engagement with the housing of the water pump when the vent valve is assembled to the water pump; An abutment is disposed within the channel and is movable between a first position and a second position in the channel. In the first position, the abutment contacts the limiting portion to prevent the abutment from falling out of the channel. In the second position, the abutment abuts the outlet. The abutment is configured to be adjacent to the first position at the initial start of the water pump, such that gas entering the channel from the inlet is discharged from the outlet via the channel. After the gas is discharged, the abutment moves to the second position in response to the pressure of fluid entering the channel from the inlet to block the fluid from being discharged from the outlet.

2. The exhaust valve according to claim 1, characterized in that, A gap is formed between the abutment and the sidewall of the channel so that when the water pump is initially started, the gas that enters the channel through the inlet is discharged from the outlet through the gap.

3. The exhaust valve according to claim 1, characterized in that, The joint includes a circumferential protrusion formed on the upper surface of the valve body.

4. The exhaust valve according to claim 1, characterized in that, The channel has a tapered structure that gradually tapers towards the exit near the exit.

5. The exhaust valve according to claim 1, characterized in that, The limiting portion includes a limiting rib extending radially inward from the side wall of the channel.

6. The exhaust valve according to claim 1, characterized in that, The upper surface of the valve body is provided with a boss, and the outlet is formed on the boss. The size of the boss is designed to allow it to pass through the opening of the housing and be exposed outside the housing when the vent valve is assembled to the water pump. The outer wall of the boss includes a radially outwardly extending lip, which is configured to prevent the vent valve from falling into the housing.

7. The exhaust valve according to claim 1, characterized in that, The flexible material includes rubber.

8. A water pump, characterized in that, The water pump includes: shell; and The exhaust valve according to any one of claims 1 to 7 is assembled to the housing.

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