Self-priming pump

Abstract

The utility model relates to the technical field of water pumps, in particular to a self-priming pump which comprises a pump body, a water inlet and a water outlet are arranged on the pump body, a water inlet pipe is arranged in the pump body, one end of the water inlet pipe is communicated with the water inlet, and the other end of the water inlet pipe is used for being connected with an impeller. A communicating pipe is arranged on the upper portion of the water inlet pipe and enables the water inlet pipe to be communicated with the interior of the pump body, the impeller can introduce media into the pump body from the water inlet, a water return opening is formed in the bottom of the water inlet pipe and communicated with the interior of the pump body, and a water return valve used for opening and closing the water return opening is arranged at the water return opening. The design of the water return valve realizes the accurate control of the water return port, the water return valve can be closed as required to prevent the influence on the extraction flow, and the water return valve can also be opened during self-suction to assist the discharge of air, so that the self-suction efficiency is improved, and the reliability and flexibility of the whole system are improved.

Description

Technical Field

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

[0002] Self-priming pumps, as important fluid transport devices, are widely used in various fields such as industrial production, agricultural irrigation, and daily life. Their main function is to automatically draw in liquids without pre-priming, thereby improving work efficiency and reducing operational complexity. Traditional self-priming pump technology has been developing for many years, and continuous optimization of pump structure, impeller design, and inlet / outlet methods has significantly improved pump efficiency and applicability. However, with increasingly diverse application environments, higher demands are being placed on the functionality and reliability of self-priming pumps.

[0003] Existing self-priming pumps typically achieve self-priming by setting up a return water pipe. However, after self-priming is completed, the return water through hole can actually affect the pumping efficiency of the pump body. Utility Model Content

[0004] To address the problem that existing self-priming pumps typically employ a return water pipe to achieve self-priming, but the return water passage can negatively impact the pump's pumping efficiency after self-priming is complete, this application provides a self-priming pump.

[0005] A self-priming pump includes a pump body with an inlet and an outlet. An inlet pipe is installed inside the pump body, with one end connected to the inlet and the other end connected to an impeller. A certain distance is left between the bottom of the inlet pipe and the inner wall of the pump body. A connecting pipe is installed at the top of the inlet pipe, connecting it to the interior of the pump body. The impeller can guide the medium from the inlet into the pump body. A return port is opened at the bottom of the inlet pipe, connecting to the interior of the pump body. A return valve is installed at the return port for opening and closing the return port.

[0006] By adopting the above technical solutions, the design of the return water valve achieves precise control of the return water inlet. It can close after self-priming to prevent it from affecting the pumping flow rate, and it can also open during self-priming to assist in the discharge of air, thereby improving the self-priming efficiency and enhancing the reliability and flexibility of the entire system.

[0007] Optionally, the return valve includes a valve sleeve and a valve body. The valve sleeve is installed at the return port, and the valve body is slidably connected to the valve sleeve. The medium at the bottom of the pump body can push the valve body toward the return port, and the valve body can completely block the valve sleeve when it moves toward the return port.

[0008] By adopting the above technical solution, the return water valve includes a valve sleeve and a valve body. The valve sleeve is installed at the return water port, and the valve body is slidably connected to the valve sleeve, allowing the valve body to move under the pressure of the medium at the bottom of the pump body. When the medium pressure inside the pump body increases, the medium pushes the valve body towards the return water port and eventually completely seals the valve sleeve, thereby improving the working stability of the self-priming pump.

[0009] Optionally, a plug is provided on the pump body corresponding to the return water valve. The plug is detachably connected to the pump body and can abut against the valve sleeve. A water inlet is provided on the side of the valve sleeve near the plug and the water inlet is located on the lower side of the valve body.

[0010] By adopting the above technical solutions, the detachable connection between the plug and the pump body facilitates maintenance and replacement of parts, improving the ease of maintenance of the device. The water inlet of the valve sleeve facilitates the flow of medium to the lower side of the valve body for return water, and also makes it easier to push the valve body, thus facilitating the sealing of the return water inlet after self-priming.

[0011] Optionally, multiple water inlets are provided at equal intervals along the circumference of the valve body.

[0012] By adopting the above technical solution, multiple water inlets are set at equal intervals along the circumference of the valve body, which can effectively increase the number of return water paths, making the medium in the pump body more evenly distributed during the return flow process, and also enabling the medium to effectively lift the valve body.

[0013] Optionally, the valve sleeve has a mating groove corresponding to the plug, the mating groove is configured to correspond to the shape of the plug, and the plug can be embedded in the mating groove.

[0014] By adopting the above technical solutions, the stability of the valve sleeve after assembly is improved, which can provide better positioning and fixing effect for the valve sleeve and reduce valve sleeve movement that affects the sealing effect.

[0015] Optionally, a support rod is provided at the bottom of the valve body. The support rod is fixedly connected to the valve body. The cross-sectional area of ​​the support rod is smaller than that of the valve body. A return water space is left between the support rod and the water inlet.

[0016] By adopting the above technical solutions, the medium inside the pump body can smoothly pass through the water inlet and flow around the support rod, effectively reducing fluid resistance, while ensuring unobstructed return water flow, thus improving the working efficiency and stability of the self-priming pump.

[0017] Optionally, a return spring is provided between the valve body and the valve sleeve. One end of the return spring is fixedly connected to the valve body, and the other end of the return spring is fixedly connected to the valve sleeve. The return spring has a tendency to push the valve body toward the plug.

[0018] By adopting the above technical solution, the reset spring enables the valve body to always maintain a tendency to move towards the plug without external force, thereby ensuring that the return port remains open when not in operation. When negative pressure is not formed, the medium can flow back when the return port is always open, and the return port will be closed after negative pressure is formed, thereby reducing the impact on the flow rate.

[0019] Optionally, a limiting strip is provided on the top of the valve body. The limiting strip is fixedly connected to the valve body and can pass through the return water port and abut against the inner wall of the water inlet pipe.

[0020] By adopting the above technical solutions, the limit strip can restrict the position of the valve body, thereby reducing excessive movement of the valve body and improving stability during use.

[0021] Optionally, a water channel is provided on the limiting strip, and the water channel is provided through the limiting strip.

[0022] By adopting the above technical solutions, the water channel can reduce the impact on the flow of the medium and maintain the flow rate.

[0023] In summary, this application has at least the following beneficial effects:

[0024] To address the problem that existing self-priming pumps typically achieve self-priming by setting up a return water pipe, but the return water passage actually affects the pumping efficiency after self-priming is completed, this application introduces a return water valve at the return water inlet to control the opening and closing of the return water inlet. The return water inlet can be opened when return water is needed and closed when return water is not needed, thereby improving the pumping efficiency of the water pump. Attached Figure Description

[0025] Figure 1 This is a perspective view of this embodiment.

[0026] Figure 2 This is a cross-sectional view of this embodiment.

[0027] Figure 3 This is a cross-sectional view of this embodiment.

[0028] Explanation of reference numerals in the attached figures:

[0029] 1. Pump body; 11. Inlet; 12. Outlet; 13. Plug;

[0030] 2. Inlet pipe; 21. Connecting pipe; 22. Return water outlet;

[0031] 3. Return valve; 31. Valve sleeve; 311. Water inlet; 312. Fitting groove; 313. Water passage space; 32. Valve body; 321. Support rod; 322. Limiting strip; 323. Water passage groove; 33. Return spring. Detailed Implementation

[0032] The present application will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0033] A self-priming pump, such as Figure 1 and Figure 2 As shown, the pump includes a pump body 1, with an inlet 11 and an outlet 12 on the top of the pump body 1. An inlet pipe 2 is installed inside the pump body 1. One end of the inlet pipe 2 is connected to the inlet 11, and the other end of the inlet pipe 2 is used to connect to the impeller. The bottom of the inlet pipe 2 is a certain distance away from the inner wall of the pump body 1.

[0034] like Figure 2 and Figure 3 As shown, a connecting pipe 21 is provided at the upper part of the inlet pipe 2, which connects the inlet pipe 2 to the inside of the pump body 1. The impeller can pass the medium into the pump body 1 from the inlet 11. A return port 22 is provided at the bottom of the inlet pipe 2, which is connected to the inside of the pump body 1. A return valve 3 is provided at the return port 22 for opening and closing the return port 22. In specific implementation, when pumping, the pump body 1 does not need to be filled with medium in advance. Water is only needed to be introduced into the inlet 11, and the medium is discharged into the pump body 1 through the connecting pipe 21. At the same time, the medium can flow back through the return port 22 at the bottom of the return pipe to form a negative pressure, which forces the gas inside the pump body 1 out from the outlet 12, thereby achieving self-priming.

[0035] like Figure 2 and Figure 3 As shown, the return valve 3 includes a valve sleeve 31 and a valve body 32. The valve sleeve 31 is installed at the return port 22, and the valve body 32 is slidably connected to the valve sleeve 31. The medium at the bottom of the pump body 1 can push the valve body 32 toward the return port 22. When the valve body 32 moves toward the return port 22, it can completely block the valve sleeve 31. In specific implementation, when the gas is not completely discharged, the valve body 32 will open the return port 22 under the action of gravity. When the gas is discharged, the negative pressure formed by the liquid and the interior can push the valve body 32 toward the return port 22, thereby blocking the return port 22 and closing it.

[0036] like Figure 2 and Figure 3As shown, a plug 13 is provided on the pump body 1 corresponding to the return water valve 3. The plug 13 is detachably connected to the pump body 1 and can abut against the valve sleeve 31. A water inlet 311 is provided on the side of the valve sleeve 31 near the plug 13, and the water inlet 311 is located on the lower side of the valve body 32. Multiple water inlets 311 are provided at equal intervals along the circumference of the valve body 32. A mating groove 312 is provided on the valve sleeve 31 corresponding to the plug 13. The mating groove 312 is designed to correspond to the shape of the plug 13, and the plug 13 can be embedded in the mating groove 312. In specific implementation, the plug 13 is made of copper and is connected to the pump body 1 by bolts. The edge of the plug 13 can be fitted into the mating groove 312 of the valve sleeve 31. The plug 13 can restrict the position of the valve sleeve 31, and the medium can flow from the water inlet 311 to the valve body 32 to lift the valve body 32, reducing the situation where there is no liquid under the valve body 32 to lift the valve body 32.

[0037] like Figure 2 and Figure 3 As shown, a support rod 321 is provided at the bottom of the valve body 32. The support rod 321 is fixedly connected to the valve body 32. The cross-sectional area of ​​the support rod 321 is smaller than that of the valve body 32. A return water space is left between the support rod 321 and the water inlet 311. A return spring 33 is provided between the valve body 32 and the valve sleeve 31. One end of the return spring 33 is fixedly connected to the valve body 32, and the other end of the return spring 33 is fixedly connected to the valve sleeve 31. The return spring 33 has a tendency to push the valve body 32 toward the plug 13. In practice, the support rod 321 can abut against the plug 13 without completely blocking the bottom of the valve body 32. The return water space at the bottom of the valve body 32 allows the medium to flow and lift the valve body 32. The return spring 33 can push the valve body 32 toward the plug 13, thus keeping the return water port 22 open before self-priming is completed. After self-priming is completed, the valve body 32 can be moved to the position of blocking the return water port 22 under negative pressure and the push of the medium.

[0038] like Figure 2 and Figure 3 As shown, a limiting strip 322 is provided on the top of the valve body 32. The limiting strip 322 is fixedly connected to the valve body 32 and can pass through the return port 22 and abut against the inner wall of the inlet pipe 2. A water passage groove 323 is provided on the limiting strip 322, and the water passage groove 323 is provided through the limiting strip 322. In specific implementation, the limiting strip 322 can limit the movement range of the valve body 32, reducing the possibility of excessive movement of the valve body 32. At the same time, the water passage groove 323 on the limiting strip 322 can make way for the medium, reducing the possibility of the medium flow being excessively affected.

[0039] Working principle: The negative pressure formed by self-priming and the push of the medium control the return water valve 3. When the return water valve 3 is open, it can perform self-priming and complete the discharge of gas. When pumping water normally, the return water valve 3 is closed to reduce the impact on the flow rate.

[0040] The above are preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made to the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A self-priming pump, comprising a pump body (1), wherein an inlet (11) and an outlet (12) are provided on the upper part of the pump body (1), and an inlet pipe (2) is provided inside the pump body (1), one end of the inlet pipe (2) being connected to the inlet (11), and the other end of the inlet pipe (2) being used to connect to an impeller, characterized in that: The bottom of the water inlet pipe (2) is a certain distance from the inner wall of the pump body (1). A connecting pipe (21) is provided at the top of the water inlet pipe (2). The connecting pipe (21) connects the water inlet pipe (2) with the inside of the pump body (1). The impeller can pass the medium from the water inlet (11) into the inside of the pump body (1). A return water inlet (22) is provided at the bottom of the water inlet pipe (2). The return water inlet (22) is connected to the inside of the pump body (1). A return water valve (3) for opening and closing the return water inlet (22) is provided at the return water inlet (22).

2. A self-priming pump according to claim 1, characterized in that: The return valve (3) includes a valve sleeve (31) and a valve body (32). The valve sleeve (31) is installed at the return port (22), and the valve body (32) is slidably connected to the valve sleeve (31). The medium at the bottom of the pump body (1) can push the valve body (32) toward the return port (22). When the valve body (32) moves toward the return port (22), it can completely block the valve sleeve (31).

3. A self-priming pump according to claim 2, characterized in that: A plug (13) is provided on the pump body (1) corresponding to the return valve (3). The plug (13) is detachably connected to the pump body (1). The plug (13) can abut against the valve sleeve (31). A water inlet (311) is provided on the side of the valve sleeve (31) near the plug (13). The water inlet (311) is located on the lower side of the valve body (32).

4. A self-priming pump according to claim 3, characterized in that: The water inlet (311) is provided at equal intervals along the circumference of the valve body (32).

5. A self-priming pump according to claim 3, characterized in that: The valve sleeve (31) has a mating groove (312) corresponding to the plug (13). The mating groove (312) is set to correspond to the shape of the plug (13), and the plug (13) can be embedded in the mating groove (312).

6. A self-priming pump according to claim 3, characterized in that: A support rod (321) is provided at the bottom of the valve body (32). The support rod (321) is fixedly connected to the valve body (32). The cross-sectional area of ​​the support rod (321) is smaller than that of the valve body (32). A return water space is left between the support rod (321) and the water inlet (311).

7. A self-priming pump according to claim 6, characterized in that: A return spring (33) is provided between the valve body (32) and the valve sleeve (31). One end of the return spring (33) is fixedly connected to the valve body (32), and the other end of the return spring (33) is fixedly connected to the valve sleeve (31). The return spring (33) has the tendency to push the valve body (32) toward the plug (13).

8. A self-priming pump according to claim 7, characterized in that: The valve body (32) is provided with a limiting strip (322) at the top. The limiting strip (322) is fixedly connected to the valve body (32). The limiting strip (322) can pass through the return water port (22) and abut against the inner wall of the water pipe (2).

9. A self-priming pump according to claim 8, characterized in that: A water channel (323) is provided on the limiting strip (322), and the water channel (323) passes through the limiting strip (322).

Images