Anti-siphon device for vertical self-priming pump

Abstract

The utility model discloses an anti-siphon device for a vertical self-priming pump, which is characterized in that the anti-siphon device comprises a communicating pipeline (1), one end of the communicating pipeline (1) is communicated with an inner cavity of a pumping chamber (2) of the vertical self-priming pump, the other end of the communicating pipeline (1) is communicated with an inlet pipeline (3) of the vertical self-priming pump, and a fixed partition plate (4) is arranged in the communicating pipeline (1). A piston rod (5) is movably connected to the fixed partition plate (4) in a penetrating mode, a piston (6) is arranged at one end of the piston rod (5), a rubber plug (7) is arranged at the other end of the piston rod (5), the piston (6) and the rubber plug (7) are both movably connected into the communicating pipeline (1), and a spring (8) is connected to the outside of the piston rod (5) in a sleeving mode and located between the fixed partition plate (4) and the piston (6).

Description

Technical Field

[0001] The utility model relates to the field of pump design and manufacturing, in particular to an anti-siphon device for a vertical self-priming pump. Background Art

[0002] Traditional vertical self-priming pumps need to be filled with medium before starting. When the pump is stopped, the medium in the pump body will be sucked back into the pool due to the siphon effect of the pipes in the pool, resulting in the need to refill the pump with liquid when starting the pump next time, which is very time-consuming and laborious.

[0003] In order to solve the above problems, some vertical self-priming pumps will install a solenoid valve at the joint of the pump body. When the pump body stops working, the solenoid valve is used to close the pipeline between the vertical self-priming pump and the water tank. However, this method requires circuit layout and requires the solenoid valve to work together with the pump control system, which adds additional costs. In addition, this method also requires wiring for the solenoid valve, which poses a major safety hazard in the working environment of the vertical self-priming pump.

[0004] Therefore, a method or device capable of solving the above problems is now needed. Utility Model Content

[0005] The utility model aims to solve the above-mentioned deficiencies in the prior art and proposes an anti-siphon device for a vertical self-priming pump which has a simple structure, ingenious design, reasonable layout, does not require electricity connection and can realize full-automatic operation.

[0006] The technical solution of the utility model is: an anti-siphon device for a vertical self-priming pump, characterized in that: the device comprises a connecting pipe 1, one end of which is connected to the inner cavity of a water pressure chamber 2 of the vertical self-priming pump, and the other end is connected to an inlet pipe 3 of the vertical self-priming pump.

[0007] The connecting pipeline 1 is provided with a fixed partition 4, and a piston rod 5 is movably connected to the fixed partition 4. A piston 6 is provided at one end of the piston rod 5, and a rubber plug 7 is provided at the other end. The piston 6 and the rubber plug 7 are both movably connected in the connecting pipeline 1. A spring 8 is connected to the outer sleeve of the piston rod 5, and the spring 8 is located between the fixed partition 4 and the piston 6.

[0008] A longitudinally distributed exhaust pipe 9 is connected to the connecting pipe 1, and the rubber plug 7 can seal the bottom opening of the exhaust pipe 9. An exhaust chamber 10 is arranged on the top of the exhaust pipe 9, and two symmetrically distributed inclined baffles 11 are arranged in the exhaust chamber 10. A filter screen 12 is arranged below the inclined baffle 11, and a float 13 is arranged in the filter screen 12. A vent 14 is arranged at the junction of the top ends of the two inclined baffles 11, and the aperture of the vent 14 is smaller than the outer diameter of the float 13. A plurality of exhaust holes 15 are opened at the top end of the exhaust chamber 10.

[0009] A limiting step is provided in the connecting pipeline 1 , and when the piston 6 contacts the limiting step, the rubber plug 7 seals the bottom opening of the exhaust pipeline 9 .

[0010] Compared with the prior art, the utility model has the following advantages:

[0011] The anti-siphon device for the vertical self-priming pump of this structural form has a simple structure, ingenious design and reasonable layout. Aiming at the problem that the medium in the inner cavity of the traditional vertical self-priming pump will return to the pool under the siphon effect after the work is finished, a special device is designed, which is connected between the water pressure chamber and the inlet pipeline of the vertical self-priming pump. When the vertical self-priming pump is in working state, the device is closed, which does not affect the normal operation of the vertical self-priming pump; when the vertical self-priming pump stops working, the device automatically opens to connect the inlet pipeline of the vertical self-priming pump with the outside atmosphere, thereby preventing the water body retained in the self-priming pump from flowing back into the pool, so that it is not necessary to re-inject water into the self-priming pump when starting again, which can effectively save workload and improve work efficiency; and it is a purely mechanical structure, does not require additional energy, once installed, it is effective for a long time, and at the same time its manufacturing process is simple and the manufacturing cost is low, so it can be said that it has multiple advantages, is particularly suitable for promotion and application in this field, and has a very broad market prospect. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a structural schematic diagram of an embodiment of the utility model.

[0013] Figure 2 yes Figure 1 A partial enlarged view of the .

[0014] Figure 3 It is a schematic structural diagram of the exhaust chamber part in the embodiment of the utility model. DETAILED DESCRIPTION

[0015] The specific implementation of the present utility model will be described below in conjunction with the accompanying drawings. Figure 1 , Figure 2 , Figure 3 As shown: an anti-siphon device for a vertical self-priming pump, comprising a connecting pipe 1, one end of which is connected to the inner cavity of a water pressure chamber 2 of the vertical self-priming pump, and the other end of which is connected to an inlet pipe 3 of the vertical self-priming pump.

[0016] The connecting pipeline 1 is provided with a fixed partition 4, and a piston rod 5 is movably connected to the fixed partition 4. A piston 6 is provided at one end of the piston rod 5, and a rubber plug 7 is provided at the other end. The piston 6 and the rubber plug 7 are both movably connected in the connecting pipeline 1. A spring 8 is connected to the outer sleeve of the piston rod 5, and the spring 8 is located between the fixed partition 4 and the piston 6.

[0017] A longitudinally distributed exhaust pipe 9 is connected to the connecting pipe 1, and the rubber plug 7 can seal the bottom opening of the exhaust pipe 9. An exhaust chamber 10 is arranged on the top of the exhaust pipe 9, and two symmetrically distributed inclined baffles 11 are arranged in the exhaust chamber 10. A filter screen 12 is arranged below the inclined baffle 11, and a float 13 is arranged in the filter screen 12. A vent 14 is arranged at the junction of the top ends of the two inclined baffles 11, and the aperture of the vent 14 is smaller than the outer diameter of the float 13. A plurality of exhaust holes 15 are opened at the top end of the exhaust chamber 10.

[0018] A limiting step is provided in the connecting pipeline 1 , and when the piston 6 contacts the limiting step, the rubber plug 7 seals the bottom opening of the exhaust pipeline 9 .

[0019] The working process of the anti-siphon device for the vertical self-priming pump of the embodiment of the utility model is as follows: when used for the first time, water is poured into the inner cavity of the vertical self-priming pump through the inlet pipe 3, and after the water fills the water pressure chamber 2, the vertical self-priming pump is started, and the vertical self-priming pump sucks the water from the inlet pipe 3, and discharges it through the outlet pipe after being pressurized by the water pressure chamber 2, thereby realizing the pumping of the water;

[0020] When the vertical self-priming pump is in normal working state, the water pressure in the water pressure chamber 2 is greater than the water pressure at the inlet pipe 3. Under the action of the pressure difference, the piston 6 moves toward the inlet pipe 3. During this process, the spring 8 is compressed and the piston 6 stops moving when it moves to the limit step. At this time, the rubber plug 7 just moves to the opening at the bottom of the exhaust pipe 9 and blocks it. At this time, the interior of the vertical self-priming pump is not connected to the outside atmosphere and can work normally.

[0021] When the vertical self-priming pump is turned off, the pressure in the water pressure chamber 2 and the inlet pipe 3 are consistent. Under the action of the spring 8, the piston 6 moves in the opposite direction, and the rubber plug 7 is pulled away from the bottom opening of the exhaust pipe 9 through the piston rod 5. At this time, the exhaust pipe 9 is connected to one side of the inlet pipe 3 through the connecting pipe 1, which is equivalent to the inlet pipe 3 being connected to the atmosphere through the exhaust pipe 9. Therefore, the water in the vertical self-priming pump will not flow back to the pool due to the siphon effect;

[0022] When the vertical self-priming pump is started again, in the initial state, the pressure on one side of the inlet pipe 3 is greater than the pressure in the water pressure chamber 2, so the water will enter the exhaust pipe 9 through the connecting pipe 1 (because the bottom of the exhaust pipe 9 is open at this time). When the space below the inclined baffle 11 is filled with water, the float 13 will float up and move to the vent 14 under the guidance of the inclined baffle 11. Since the aperture of the vent 14 is smaller than the outer diameter of the float 13, the float 13 will block the vent 14 under the action of water pressure. At this time, one side of the inlet pipe 3 is no longer connected to the atmosphere, and the vertical self-priming pump can work normally.

[0023] Once this anti-siphon device is set up, it can operate fully automatically and does not require additional energy supply during operation. For a vertical self-priming pump equipped with this device, the water in it will not flow back into the pool due to the siphon effect when it is shut down. In other words, except for the need to fill it with water when it is started for the first time, there is no need to fill it with water when it is started again, which can effectively reduce labor workload and improve work efficiency.

Claims

1. An anti-siphon device for a vertical self-priming pump, characterized in that: The device comprises a connecting pipe (1), one end of which is connected to the inner cavity of a water pressure chamber (2) of a vertical self-priming pump, and the other end of which is connected to an inlet pipe (3) of the vertical self-priming pump. A fixed baffle (4) is provided in the connecting pipeline (1), a piston rod (5) is movably connected to the fixed baffle (4), a piston (6) is provided at one end of the piston rod (5), and a rubber plug (7) is provided at the other end, the piston (6) and the rubber plug (7) are both movably connected in the connecting pipeline (1), a spring (8) is connected to the outer shell of the piston rod (5), and the spring (8) is located between the fixed baffle (4) and the piston (6). A longitudinally distributed exhaust pipe (9) is connected to the connecting pipe (1), the rubber plug (7) can seal the bottom opening of the exhaust pipe (9), an exhaust chamber (10) is arranged at the top of the exhaust pipe (9), two symmetrically distributed inclined baffles (11) are arranged in the exhaust chamber (10), a filter screen (12) is arranged below the inclined baffle (11), a float (13) is arranged in the filter screen (12), a vent hole (14) is arranged at the junction of the top ends of the two inclined baffles (11), the aperture of the vent hole (14) is smaller than the outer diameter of the float (13), and a plurality of exhaust holes (15) are opened at the top end of the exhaust chamber (10).

2. The anti-siphon device for a vertical self-priming pump according to claim 1, characterized in that: A limiting step is provided in the connecting pipeline (1), and when the piston (6) contacts the limiting step, the rubber plug (7) seals the bottom opening of the exhaust pipeline (9).

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