Seal-free self-priming pump with anti-siphon floating ball device
By introducing an anti-siphon float device into the self-priming pump and using the float and guide bar structure to prevent liquid backflow, the siphon problem of the traditional self-priming pump is solved, the efficient startup and protection of the self-priming pump is achieved, and it has an automatic cleaning function.
Patent Information
- Application Number
- CN202423237380.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-27
- Publication Date
- 2025-10-28
- Estimated Expiration
- 2034-12-27
AI Technical Summary
After a traditional self-priming pump is shut down, the siphon effect can easily cause the liquid to flow back into the suction pipe, affecting the working efficiency and possibly damaging the pump body. The water needs to be re-primed when it is started next time.
An anti-siphon float device has been designed, which uses the float to fit tightly against the suction pipe opening under the siphon effect to prevent liquid backflow, and prevents siphoning through the guide strip and sealing ring structure. At the same time, a cleaning brush head is equipped to clean impurities on the filter screen to ensure normal startup.
It effectively prevents siphoning and ensures that the self-priming pump does not need to be re-primed when it is started next time, thereby improving work efficiency, maintaining water flow and protecting the pump body.
Smart Images
Figure CN223482908U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of self-priming pump technology, specifically a sealless self-priming pump with an anti-siphon float device. Background Technology
[0002] A self-priming pump is a type of pump capable of self-priming. This type of pump is a centrifugal pump that automatically draws water up without requiring the suction line to be filled with water. Specifically, when the pump starts, its internal impeller rotates at high speed, creating a negative pressure at the impeller inlet. This negative pressure creates suction, drawing liquid below the pump's position into the pump. The liquid is then further pressurized by the impeller and discharged from the pump body. The main functions of a self-priming pump include:
[0003] Self-priming function: As mentioned above, self-priming pumps can automatically draw in liquids without external guidance or assistance, a feature that makes them very convenient in various applications. Pressure boosting: Through the rotation of the impeller, self-priming pumps can boost the pressure of the drawn-in liquid, achieving higher pressures to meet the needs of transportation or use. Liquid transportation: Self-priming pumps are commonly used for liquid transportation, especially when it is necessary to transport liquids from one place to another; their high efficiency and convenience make them an ideal choice.
[0004] In summary, self-priming pumps, with their unique self-priming capability and wide range of applications, have become indispensable equipment in many fields.
[0005] However, in practical applications, existing self-priming pumps can automatically draw in liquid and maintain a stable flow output after startup, making them widely used in agricultural irrigation, industrial cooling, and domestic water supply. However, after a traditional self-priming pump stops, due to the siphon effect, the liquid inside the pump body may flow back into the suction pipe, requiring complete repriming upon restarting. This not only affects working efficiency but may also damage the pump body. Utility Model Content
[0006] The purpose of this invention is to provide a seal-less self-priming pump with an anti-siphon float device, solving the problem mentioned in the background art where self-priming pumps can automatically draw in liquid and maintain a stable flow output after startup, and are widely used in agricultural irrigation, industrial cooling, and domestic water supply. However, with traditional self-priming pumps, after shutdown, due to the siphon effect, the liquid in the pump body may flow back into the suction pipe, requiring complete repriming upon restarting. This not only affects working efficiency but may also damage the pump body.
[0007] To achieve the above objectives, this utility model provides the following technical solution: including a self-priming pump body and a device body;
[0008] The device body has a suction pipe and a connecting pipe fixedly connected to its front and rear ends, respectively. A sealing ring is embedded and bonded to the inner side of the rear end of the suction pipe. A filter screen is fixedly installed on the inner wall of the device body. A guide strip is fixedly installed at the front end of the filter screen. A float ball is movably connected inside the guide strip.
[0009] The device body has a support slide rod that is movably connected to the upper rear side. A sealing pressure ring is movably connected to the upper outer curved surface of the support slide rod. A limit ring is fixedly installed on the upper outer curved surface of the support slide rod. A support spring is fixedly installed at the lower end of the limit ring. A connecting plate is fixedly installed at the bottom of the support slide rod. Limit slide rods are movably connected to both sides of the connecting plate. A cleaning brush head for cleaning the filter screen is fixedly installed at the front end of the connecting plate.
[0010] Preferably, a connecting flange is fixedly installed at the outer end opening of the suction pipe and the connecting pipe, and the connecting pipe is connected to the water inlet of the self-priming pump body through the connecting flange.
[0011] Preferably, there are several guide strips, which are symmetrically distributed in an arc shape around the front end of the filter screen, and the front end of the guide strips is fixedly installed at the rear end opening of the suction pipe.
[0012] Preferably, the float is made of a stainless steel shell filled with low-density foam, and the outer diameter of the float matches the opening at the rear end of the sealing ring.
[0013] Preferably, a handle for pushing and pulling the support slide is fixedly installed at the top end of the support slide.
[0014] Preferably, the sealing ring is fixed to the rear side of the upper end of the device body, and the lower end of the support spring is fixedly installed on the upper end of the sealing ring.
[0015] Preferably, there are two limiting slide rods, which are symmetrically distributed on both sides of the connecting plate, and the upper and lower ends of the limiting slide rods are fixedly installed on the inner side wall of the main body of the device.
[0016] Compared with the prior art, the beneficial effects of the present invention are:
[0017] 1. When the self-priming pump body is turned on, it drives the impeller inside the pump body to rotate, creating a negative pressure inside the device body through the connecting pipe. When a negative pressure is generated inside the device body, air and water from the external water source pipe are drawn into the self-priming pump body through the suction pipe. As air and water from the external water source pipe are drawn into the self-priming pump body through the device body and connecting pipe, the float inside the guide bar sinks due to gravity, not hindering the liquid from being drawn into the self-priming pump body. As the liquid fills the self-priming pump body and device... When the self-priming pump is inside the main body, the float will rise with the liquid level to the top of the guide bar, but will always remain inside the guide bar, without affecting the normal flow of water. At the same time, the water flowing through the main body of the device is filtered by the filter screen. When the self-priming pump stops running, the pressure inside the self-priming pump gradually balances, and the liquid inside the main body begins to flow back due to the siphon effect. This causes the float to flow along the guide bar with the water flow to the opening at the rear end of the sealing ring, which tightly fits the rear end of the suction pipe to prevent the liquid from flowing back, thus effectively preventing the siphon phenomenon and ensuring that the self-priming pump does not need to be completely re-primed when it is started next time.
[0018] 2. This utility model also supports the sliding rod by pushing and pulling the handle up and down. When the supporting sliding rod is pushed and pulled up and down, it will drive the connecting plate to move up and down in a straight line. When the connecting plate moves up and down in a straight line, it will drive the cleaning brush head to move up and down in a straight line. When the cleaning brush head moves up and down in a straight line, it will clean the filter screen plate from top to bottom, so as to avoid the filter screen plate from being used for a long time because a lot of impurities will adhere to it and affect the water flow inside the main body of the device. Attached Figure Description
[0019] Figure 1 This is a schematic diagram of the overall structure of a sealless self-priming pump with an anti-siphon float device according to this utility model;
[0020] Figure 2 This is a partial structural diagram of a sealless self-priming pump with an anti-siphon float device according to this utility model;
[0021] Figure 3 This is a partial cross-sectional view of a sealless self-priming pump with an anti-siphon float device according to the present invention.
[0022] In the diagram: 1. Self-priming pump body; 2. Device body; 3. Suction pipe; 4. Connecting pipe; 5. Sealing ring; 6. Filter screen; 7. Guide bar; 8. Float; 9. Support slide bar; 10. Sealing pressure ring; 11. Limiting ring; 12. Connecting plate; 13. Limiting slide bar; 14. Cleaning brush head; 15. Supporting spring. Detailed Implementation
[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0024] Please see Figure 1-3 This utility model provides a sealless self-priming pump with an anti-siphon float device: including a self-priming pump body 1 and a device body 2;
[0025] The front and rear ends of the main body 2 are respectively fixedly connected to a suction pipe 3 and a connecting pipe 4. A connecting flange is fixedly installed at the outer opening of the suction pipe 3 and the connecting pipe 4. The connecting pipe 4 is connected to the water inlet of the self-priming pump body 1 through the connecting flange. A sealing ring 5 is embedded and bonded to the inner side of the rear end of the suction pipe 3. A filter screen plate 6 is fixedly installed on the inner wall of the main body 2. A guide strip 7 is fixedly installed at the front end of the filter screen plate 6. There are several guide strips 7, which are symmetrically distributed in an arc shape around the front end of the filter screen plate 6. The front end of the guide strip 7 is fixedly installed at the rear end opening of the suction pipe 3. A float ball 8 is movably connected inside the guide strip 7. The float ball 8 is made of stainless steel shell filled with low-density foam. The outer diameter of the float ball 8 matches the rear end opening of the sealing ring 5 to ensure that it can fit tightly against the pipe opening of the suction pipe 3 and prevent the liquid inside the main body 2 from flowing back.
[0026] A support slide rod 9 is movably connected to the upper rear side of the main body 2. A handle for pushing and pulling the support slide rod 9 is fixedly installed at the top of the support slide rod 9. A sealing pressure ring 10 is movably connected to the outer curved surface of the upper end of the support slide rod 9 and is fixed to the upper rear side of the main body 2. A limit ring 11 is fixedly installed on the outer curved surface of the top of the support slide rod 9. A support spring 15 is fixedly installed at the lower end of the limit ring 11, and the lower end of the support spring 15 is fixedly installed on the upper end of the sealing pressure ring 10, so that the support spring 15 can pass through the upper rear side of the main body 2. The limiting ring 11 provides elastic support for the support slide rod 9. A connecting plate 12 is fixedly installed at the bottom of the support slide rod 9. Limiting slide rods 13 are movably connected through both sides of the connecting plate 12. There are two limiting slide rods 13, which are symmetrically distributed on both sides of the connecting plate 12. The upper and lower ends of the limiting slide rods 13 are fixedly installed on the inner side wall of the main body 2 of the device, so that the connecting plate 12 can be linearly moved and limited by the limiting slide rods 13. A cleaning brush head 14 for cleaning the filter screen plate 6 is fixedly installed at the front end of the connecting plate 12.
[0027] Working Principle: In use, this utility model connects the suction pipe 3 to the external water source pipe via a connecting flange. When the suction pipe 3 is connected to the external water source pipe, the self-priming pump body 1 is activated by control. When the self-priming pump body 1 is activated, it drives the impeller inside the self-priming pump body 1 to rotate, causing a negative pressure to be generated inside the device body 2 through the connecting pipe 4. When a negative pressure is generated inside the device body 2, air and water from the external water source pipe are drawn into the self-priming pump body 1 through the suction pipe 3 via the device body 2 and the connecting pipe 4. When air and water from the external water source pipe are drawn into the self-priming pump body 1 through the device body 2 and the connecting pipe 4, the float 8 inside the guide bar 7 will sink due to gravity. The liquid is drawn into the self-priming pump body 1 without obstructing the liquid from being drawn into the body. As the liquid fills the self-priming pump body 1 and the device body 2, the float 8 will rise with the liquid level to the top of the guide bar 7, but will always remain inside the guide bar 7, without affecting the normal flow of water. At the same time, the water flowing through the device body 2 is filtered by the filter screen 6. When the self-priming pump body 1 stops running, the pressure inside the self-priming pump body 1 gradually balances, and the liquid inside the device body 2 begins to flow back due to the siphon effect. This causes the float 8 to flow along the guide bar 7 with the water flow to the rear opening of the sealing ring 5, which tightly fits the rear end of the suction pipe 3 to prevent the liquid from flowing back, thereby effectively preventing the siphon phenomenon and ensuring that the self-priming pump body 1 does not need to be completely re-primed when it is started next time.
[0028] At the same time, by pushing and pulling the support slide rod 9 up and down, the connecting plate 12 will move up and down in a straight line when the support slide rod 9 is pushed and pulled up and down. When the connecting plate 12 moves up and down in a straight line, the cleaning brush head 14 will move up and down in a straight line. When the cleaning brush head 14 moves up and down in a straight line, it will clean the filter screen plate 6 from top to bottom, so as to avoid the filter screen plate 6 from being used for a long time because a lot of impurities will be attached and affect the water flow inside the main body 2 of the device.
[0029] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus.
[0030] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.
Claims
1. A sealless self-priming pump with an anti-siphon float device, characterized in that: It includes a self-priming pump body (1) and a device body (2); The front and rear ends of the device body (2) are respectively fixedly connected to a suction pipe (3) and a connecting pipe (4). A sealing ring (5) is embedded and bonded to the inner side of the rear end of the suction pipe (3). A filter screen plate (6) is fixedly installed on the inner wall of the device body (2). A guide strip (7) is fixedly installed at the front end of the filter screen plate (6). A float ball (8) is movably connected inside the guide strip (7). The upper rear side of the main body (2) of the device is connected to a support slide rod (9) that is fitted and movably connected. The upper outer curved surface of the support slide rod (9) is fitted and movably connected to a sealing pressure ring (10). The upper outer curved surface of the support slide rod (9) is fixedly installed with a limit ring (11). The lower end of the limit ring (11) is fixedly installed with a support spring (15). The bottom of the support slide rod (9) is fixedly installed with a connecting plate (12). The two sides of the connecting plate (12) are fitted and movably connected with limit slide rods (13). The front end of the connecting plate (12) is fixedly installed with a cleaning brush head (14) for cleaning the filter screen (6).
2. A sealless self-priming pump with an anti-siphon float device according to claim 1, characterized in that: The suction pipe (3) and the connecting pipe (4) are respectively fixedly installed with connecting flanges at their outer ends. The connecting pipe (4) is connected to the water inlet of the self-priming pump body (1) through the connecting flanges.
3. A sealless self-priming pump with an anti-siphon float device according to claim 2, characterized in that: There are several guide strips (7), which are symmetrically distributed in an arc shape around the front end of the filter screen (6). The front end of the guide strips (7) is fixedly installed at the rear end opening of the suction pipe (3).
4. A sealless self-priming pump with an anti-siphon float device according to claim 3, characterized in that: The float (8) is made of a stainless steel shell filled with low-density foam, and the outer diameter of the float (8) matches the opening at the rear end of the sealing ring (5).
5. A sealless self-priming pump with an anti-siphon float device according to claim 4, characterized in that: A handle for pushing and pulling the support slide rod (9) is fixedly installed at the top end of the support slide rod (9).
6. A sealless self-priming pump with an anti-siphon float device according to claim 5, characterized in that: The sealing ring (10) is fixed to the upper rear side of the main body (2) of the device, and the lower end of the support spring (15) is fixedly installed on the upper end of the sealing ring (10).
7. A sealless self-priming pump with an anti-siphon float device according to claim 6, characterized in that: There are two limiting slide rods (13), which are symmetrically distributed on both sides of the connecting plate (12). The upper and lower ends of the limiting slide rods (13) are fixedly installed on the inner side wall of the main body (2) of the device.