Household self-priming pump with anti-freezing function

Abstract

The utility model belongs to water pump technical field especially relates to a domestic self -priming pump with anti -freezing function, including pump body, drive component and two pressure regulating devices, the inside of pump body is equipped with pump cavity, and it is divided into low pressure chamber and high pressure chamber, and low pressure chamber is equipped with water inlet, and high pressure chamber is equipped with water outlet, drive component is installed in pump body side, is used for driving water flow from water inlet to enter, and the water outlet is pumped out after pressure boost, two pressure regulating devices are connected pump body side respectively and are communicated with low pressure chamber, high pressure chamber, can release the expansion pressure when the water medium in pump body freezes, when the pump is below freezing point, and the residual water in pump cavity freezes, the ice expands to the side of pressure regulating device, releases the expansion pressure, reduces the pressure that pump cavity and overflow component bear, avoids its being split or damaging, thereby realizes the anti -freezing effect.

Description

Technical Field

[0001] This utility model belongs to the field of water pump technology, and in particular relates to a household self-priming pump with antifreeze function. Background Technology

[0002] When the temperature drops below freezing in winter, the pump's flow-through components are often damaged by freezing due to residual water in the pump chamber. Because of its self-priming function, the pump chamber of a household self-priming pump is usually filled with water after the pump stops running. When this water freezes below freezing, the volume of the ice increases, and the resulting expansion stress can cause cracks in the pump body or other flow-through components.

[0003] Furthermore, in order to control costs and reduce weight, the materials used for the pump body and flow parts of household self-priming pumps are usually of lower structural strength compared to those used in industrial applications. This undoubtedly increases the possibility that the pump body and flow parts may be damaged by freezing.

[0004] Some household self-priming pumps on the market with antifreeze features usually have improved pump bodies to make them less prone to freezing and cracking. However, the flow-through components can still be damaged by expansion stress, which can easily affect their service life in low-temperature regions. Utility Model Content

[0005] The purpose of this invention is to address the aforementioned technical problems by providing a household self-priming pump with antifreeze function, thereby improving the antifreeze effect of the household self-priming pump and preventing the pump body and flow components from freezing and being damaged.

[0006] In view of this, the present invention provides a household self-priming pump with antifreeze function, comprising:

[0007] The pump body has a pump chamber inside, which is divided into a low-pressure chamber and a high-pressure chamber. The low-pressure chamber has an inlet and the high-pressure chamber has an outlet.

[0008] The drive unit is installed on the side of the pump body and is used to drive the water flow from the inlet to the outlet and pump it out after pressurization.

[0009] Two pressure regulating devices are provided, each connected to the side of the pump body and respectively connected to the low-pressure chamber and the high-pressure chamber;

[0010] The pressure regulating device is used to release the expansion pressure when the water medium in the pump body freezes.

[0011] In the above technical solution, the voltage regulating device further includes:

[0012] The casing is installed on the side of the pump body and has a pressure regulating chamber that communicates with the pump cavity;

[0013] An airbag is installed inside the housing and its interior is connected to the pump chamber of the pump body;

[0014] The pressure regulating chamber is filled with a pre-pressurized medium.

[0015] In the above technical solution, further:

[0016] A connecting cylinder is formed on the side of the housing near the pump body, and the connecting cylinder is threadedly connected to the pump body;

[0017] The connecting cylinder has an axial through hole that connects the air bladder and the pump chamber.

[0018] In the above technical solution, further:

[0019] The connecting cylinder is connected to a connecting part, and the end of the shell is provided with a edging that connects to the connecting part;

[0020] The connecting part extends into the pressure regulating cavity to form a boss.

[0021] In the above technical solution, further:

[0022] One end of the airbag opening forms an abutment portion, and the housing has a first annular groove for mounting the abutment portion.

[0023] The connecting portion extends into the first annular groove and is used to fix the abutting portion into the first annular groove.

[0024] In the above technical solution, further:

[0025] The pump body is provided with a protrusion that is threadedly connected to the connecting cylinder, and the connecting cylinder is provided with a second annular groove, and a first sealing ring is provided in the second annular groove for sealing between the protrusion and the connecting cylinder.

[0026] In the above technical solution, further:

[0027] An air inlet is provided inside the housing, and an air valve is installed at the air inlet.

[0028] In the above technical solution, further:

[0029] The valve stem has an annular protrusion on its radial surface, and a second sealing ring is installed between the annular protrusion and the housing.

[0030] The beneficial effects of this utility model are as follows:

[0031] 1. By installing pressure regulating devices in both chambers of the pump cavity, which are divided into a low-pressure chamber and a high-pressure chamber, when the pump is below freezing point, the water remaining in the pump cavity will freeze. This allows the ice in the pump cavity to expand towards the pressure regulating device, thereby releasing the expansion pressure, reducing the pressure on the pump cavity and flow components, protecting the pump cavity and flow components from cracking or damage, and achieving the effect of antifreeze.

[0032] 2. By using an air bladder that deforms under the pressure of ice expansion, a expandable buffer zone is added to the pump chamber, preventing the pump body or flow components from being subjected to excessive stress and ensuring the stable operation of the household self-priming pump.

[0033] 3. By extending the connecting part into the pressure regulating chamber to form a boss, it can prevent the air bag from excessively deforming in the reverse direction when the pump chamber is under negative pressure due to the start-up and shutdown of the household self-priming pump, thus avoiding damage to the air bag and preventing the air bag from being sucked into the pump chamber due to excessive reverse deformation, effectively ensuring the normal operation of the household self-priming pump. Attached Figure Description

[0034] Figure 1 This is a schematic diagram of the structure of this utility model;

[0035] Figure 2 This is a schematic diagram of the pressure regulating device of this utility model;

[0036] Figure 3 This is an internal sectional view of the pressure regulating device of this utility model;

[0037] The markings in the diagram are as follows: 1. Pump body; 10. Protrusion; 2. Low-pressure chamber; 3. High-pressure chamber; 4. Inlet; 5. Outlet; 6. Drive component; 7. Pressure regulating device; 70. Housing; 700. Edge; 701. First annular groove; 71. Pressure regulating chamber; 72. Air bladder; 720. Abutment part; 73. Connecting cylinder; 730. Through hole; 731. Second annular groove; 74. Connecting part; 740. Boss; 75. Air inlet; 76. Valve; 760. Annular protrusion; 77. Second sealing ring; 8. First sealing ring. Detailed Implementation

[0038] The technical solutions of the embodiments of this application will be clearly described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application are within the scope of protection of this application.

[0039] Example 1:

[0040] This embodiment provides a household self-priming pump with antifreeze function, including:

[0041] The pump body 1 has a pump chamber inside, which is divided into a low-pressure chamber 2 and a high-pressure chamber 3. The low-pressure chamber 2 has an inlet 4, and the high-pressure chamber 3 has an outlet 5.

[0042] The drive component 6 is installed on the side of the pump body 1 and is used to drive the water flow into the inlet 4 and pump it out from the outlet 5 after pressurization.

[0043] Two pressure regulating devices 7 are provided, and they are respectively connected to the side of the pump body 1 and respectively connected to the low-pressure chamber 2 and the high-pressure chamber 3;

[0044] The pressure regulating device 7 is used to release the expansion pressure when the water medium inside the pump body 1 freezes.

[0045] Meanwhile, the drive component 6 includes, but is not limited to, components such as motors and impellers. Its specific structure is existing technology and can be obtained from traditional household self-priming pumps, so it will not be described in detail here.

[0046] As can be seen from this embodiment, by setting pressure regulating devices 7 in both chambers of the pump cavity, which are divided into a low-pressure chamber 2 and a high-pressure chamber 3, when the pump is below the freezing point, the water remaining in the pump cavity will freeze. This allows the ice in the pump cavity to expand toward the pressure regulating device 7, thereby releasing the expansion pressure, reducing the pressure on the pump cavity and the flow components, protecting the pump cavity and the flow components from being cracked or damaged, and achieving the effect of antifreeze.

[0047] Example 2:

[0048] This embodiment provides a household self-priming pump with antifreeze function. In addition to the technical solutions of the above embodiments, it also has the following technical features: the pressure regulating device 7 includes:

[0049] The housing 70 is installed on the side of the pump body 1 and has a pressure regulating chamber 71 that communicates with the pump chamber;

[0050] Airbag 72 is installed inside housing 70 and its interior is connected to the pump chamber of pump body 1;

[0051] The pressure regulating chamber 71 is filled with a pre-pressurized medium.

[0052] Meanwhile, the pre-compression medium can be compressed air, and the pressure of the pre-compression medium is the pressure of the compressed air that is filled in. The specific pressure value can be determined according to different household self-priming pumps. The expansion pressure generated when freezing can be obtained by testing in the pressure regulating chamber 71. These are all existing conventional operations and will not be described in detail here.

[0053] Furthermore, the airbag 72 can be made of rubber.

[0054] As can be seen from this embodiment, by using the airbag 72 to deform under the pressure of ice expansion, a retractable buffer zone is added to the pump cavity, which avoids the pump body 1 or the flow-through components from bearing excessive stress and ensures the stable operation of the household self-priming pump.

[0055] Using compressed air as the pre-compression medium has the advantages of low cost, easy achievement of elastic expansion, and in addition to compressed air, gases such as nitrogen can also be used.

[0056] Example 3:

[0057] This embodiment provides a household self-priming pump with antifreeze function. In addition to the technical solutions of the above embodiments, it also has the following technical features:

[0058] A connecting cylinder 73 is formed on the side of the housing 70 near the pump body 1, and the connecting cylinder 73 is threadedly connected to the pump body 1.

[0059] The connecting cylinder 73 has an axially formed through hole 730 that connects the airbag 72 and the pump chamber.

[0060] As can be seen from this embodiment, by forming a connecting cylinder 73 on the side of the housing 70 near the pump body 1 and threading the connecting cylinder 73 to the pump body 1, the installation and disassembly of the pressure regulating device 7 can be effectively improved, making maintenance and replacement easier and improving convenience. The opening of the through hole 730 facilitates the connection between the pump chamber and the air bag 72, ensuring that the air bag 72 side expands first after the water freezes, thereby releasing the expansion pressure.

[0061] Example 4:

[0062] This embodiment provides a household self-priming pump with antifreeze function. In addition to the technical solutions of the above embodiments, it also has the following technical features:

[0063] The connecting cylinder 73 is connected to a connecting part 74, and the end of the shell 70 is provided with a edging 700 connected to the connecting part 74;

[0064] The connecting part 74 extends into the pressure regulating cavity 71 to form a boss 740;

[0065] Meanwhile, the connecting cylinder 73 and the connecting part 74 adopt an integrated structure.

[0066] As can be seen from this embodiment, the edge 700 formed at the end of the housing 70 facilitates the connection between the connecting part 74 and the housing 70, which can improve the structural stability and aesthetics after connection. Furthermore, the connecting part 74 extends into the pressure regulating chamber 71 to form a boss 740, which can prevent excessive reverse deformation of the air bag 72 when there is negative pressure in the pump chamber due to the start and stop of the household self-priming pump, thus avoiding damage to the air bag 72. At the same time, it can also prevent the air bag 72 from being sucked into the pump chamber due to excessive reverse deformation, effectively ensuring the normal operation of the household self-priming pump.

[0067] Example 5:

[0068] This embodiment provides a household self-priming pump with antifreeze function. In addition to the technical solutions of the above embodiments, it also has the following technical features:

[0069] The airbag 72 has an opening at one end forming an abutment portion 720, and the housing 70 has a first annular groove 701 for mounting the abutment portion 720.

[0070] The connecting portion 74 extends into the first annular groove 701 and is used to fix the abutting portion 720 within the first annular groove 701.

[0071] As can be seen from this embodiment, the abutment portion 720 formed at one end of the airbag 72 opening and the first annular groove 701 formed on the housing 70 facilitate the abutment of the edge 700 and the connecting portion 74, thereby improving the structural stability of the connection and installation of the airbag 72.

[0072] Example 6:

[0073] This embodiment provides a household self-priming pump with antifreeze function. In addition to the technical solutions of the above embodiments, it also has the following technical features:

[0074] The pump body 1 is provided with a protrusion 10 that is threadedly connected to the connecting cylinder 73, and the connecting cylinder 73 is provided with a second annular groove 731, and a first sealing ring 8 is provided in the second annular groove 731 for sealing between the protrusion 10 and the connecting cylinder 73.

[0075] The first sealing ring 8 is made of rubber.

[0076] As can be seen from this embodiment, by setting the first sealing ring 8, the sealing performance between the housing 70 and the pump body 1 is effectively improved, and the leakage of water in the pump cavity from this point is avoided.

[0077] Example 7:

[0078] This embodiment provides a household self-priming pump with antifreeze function. In addition to the technical solutions of the above embodiments, it also has the following technical features:

[0079] An air inlet 75 is provided inside the housing 70, and an air valve 76 is installed at the air inlet 75.

[0080] Among them, valve stem 76 is a one-way valve, and its specific structure is a mature existing technology, such as the one-way valve stem 76 on a pneumatic tire, which can be obtained from the traditional valve stem 76, and will not be described in detail here.

[0081] As can be seen from this embodiment, by setting the valve 76, the convenience of filling the housing 70 with the preset pressure can be improved, thereby improving the convenience of adjusting the pressure inside the housing 70 of the pressure regulating device 7, ensuring that the pressure of the pre-pressurized medium is between the water pressure in the normal working pump chamber and the expansion pressure generated when freezing, avoiding the water pressure in the normal working pump chamber causing the air bag 72 to over-expand and lose the effect of buffering expansion stress after freezing.

[0082] Example 8:

[0083] This embodiment provides a household self-priming pump with antifreeze function. In addition to the technical solutions of the above embodiments, it also has the following technical features:

[0084] The valve stem 76 has an annular protrusion 760 on its radial surface, and a second sealing ring 77 is installed between the annular protrusion 760 and the housing 70.

[0085] The second sealing ring 77 can be made of rubber.

[0086] As can be seen from this embodiment, by setting a second sealing ring 77 between the valve 76 and the housing 70, the sealing performance between the valve 76 and the housing 70 is improved, preventing leakage of the pre-pressurized medium pressure in the pressure regulating chamber 71, thereby effectively ensuring the stable operation of the self-priming pump.

[0087] The embodiments of this application have been described above with reference to the accompanying drawings. Unless otherwise specified, the embodiments and features in the embodiments of this application can be combined with each other. This application is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of this application without departing from the spirit and scope of the claims, and all of these forms are within the protection scope of this application.

Claims

1. A household self-priming pump with antifreeze function, characterized in that, include: The pump body (1) has a pump chamber inside, which is divided into a low-pressure chamber (2) and a high-pressure chamber (3). The low-pressure chamber (2) has an inlet (4), and the high-pressure chamber (3) has an outlet (5). The drive component (6) is installed on the side of the pump body (1) and is used to drive the water flow to enter from the inlet (4) and pump it out from the outlet (5) after pressurization; Two pressure regulating devices (7) are provided, and they are respectively connected to the side of the pump body (1) and respectively connected to the low pressure chamber (2) and the high pressure chamber (3); The pressure regulating device (7) is used to release the expansion pressure when the water medium inside the pump body (1) freezes.

2. The household self-priming pump with antifreeze function according to claim 1, characterized in that, The voltage regulating device (7) includes: The housing (70) is installed on the side of the pump body (1) and has a pressure regulating chamber (71) that communicates with the pump chamber; An airbag (72) is installed inside the housing (70) and its interior is connected to the pump chamber of the pump body (1); The pressure regulating chamber (71) is filled with a pre-pressurized medium.

3. The household self-priming pump with antifreeze function according to claim 2, characterized in that: A connecting cylinder (73) is formed on the side of the housing (70) near the pump body (1), and the connecting cylinder (73) is threadedly connected to the pump body (1); The connecting cylinder (73) is axially provided with a through hole (730) connecting the air bag (72) and the pump chamber.

4. The household self-priming pump with antifreeze function according to claim 3, characterized in that: The connecting cylinder (73) is connected to a connecting part (74), and the end of the shell (70) is provided with a edging (700) connected to the connecting part (74); The connecting part (74) extends into the pressure regulating cavity (71) to form a boss (740).

5. The household self-priming pump with antifreeze function according to claim 4, characterized in that: The airbag (72) has an opening at one end forming an abutment (720), and the housing (70) has a first annular groove (701) for mounting the abutment (720). The connecting portion (74) extends into the first annular groove (701) and is used to fix the abutting portion (720) in the first annular groove (701).

6. The household self-priming pump with antifreeze function according to claim 3, characterized in that: The pump body (1) is provided with a protrusion (10) that is threadedly connected to the connecting cylinder (73), and the connecting cylinder (73) is provided with a second annular groove (731), and a first sealing ring (8) is provided in the second annular groove (731) for sealing between the protrusion (10) and the connecting cylinder (73).

7. The household self-priming pump with antifreeze function according to claim 2, characterized in that: The housing (70) has an air inlet (75) on its side, and an air valve (76) is installed at the air inlet (75).

8. The household self-priming pump with antifreeze function according to claim 7, characterized in that: The valve stem (76) has an annular protrusion (760) on its radial surface, and a second sealing ring (77) is installed between the annular protrusion (760) and the housing (70).

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