Water shortage prevention device of energy-saving double suction pump
By designing a combination of volute, water tank, and float assembly in the double-suction pump, the problem of dynamic balance disruption caused by water shortage is solved, achieving stable operation under water shortage conditions and improving the service life and efficiency of the double-suction pump.
Patent Information
- Application Number
- CN202520628932.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-03
- Publication Date
- 2026-01-27
- Estimated Expiration
- 2035-04-03
AI Technical Summary
When there is a water shortage, the dynamic balance of the double-suction pump is disrupted, resulting in insufficient suction, a sudden drop in flow, internal impeller idling, and excessive temperature, which affects its service life.
An energy-saving dual-suction pump anti-water shortage device was designed, including a volute, a water storage tank, a connecting pipe, an exhaust assembly, and a float assembly. The buoyancy of the float assembly and the water pressure control the opening and closing of the exhaust and water storage valves to form a sealed water storage space and prevent the impeller from running dry when there is a water shortage.
It effectively prevents the impeller from running dry when there is a water shortage, maintains the dynamic balance of the pump, improves service life and efficiency, and avoids damage caused by excessive temperature.
Smart Images
Figure CN223839340U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the technical field of double-suction pumps, and in particular to an energy-saving double-suction pump anti-water shortage device. Background Technology
[0002] Double-suction pumps, as an important type of centrifugal pump, are widely used in engineering due to their high head and large flow rate. The impeller of this type of pump is actually composed of two impellers placed back-to-back, with the water flowing out of the impellers converging into a volute.
[0003] In the existing technology, when a double-suction pump is pumping water, it draws in liquid by forming a low-pressure zone through the double-suction impeller. Water shortage will disrupt this dynamic balance, resulting in insufficient suction or a sudden drop in flow, which will affect the pump's head and efficiency. In the case of water shortage, the internal impeller will spin dry, causing the power mechanism in the double-suction pump to overheat, thereby burning out the double-suction pump and reducing its service life. Utility Model Content
[0004] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide an energy-saving double-suction pump anti-water shortage device, so as to solve the technical problems mentioned in the background art.
[0005] The above-mentioned technical objective of this utility model is achieved through the following technical solution:
[0006] An energy-saving double-suction pump anti-water shortage device includes a volute, a fixed support is provided on the outer peripheral wall of the volute, a shaft for connecting a drive motor is provided inside the volute, a water storage tank is provided at the top of the fixed support, a connecting pipe is provided at the bottom of the water storage tank and communicates with the volute, a water storage valve is provided inside the connecting pipe, an exhaust port is provided at the top of the water storage tank, and an exhaust component is provided inside the exhaust port.
[0007] The exhaust assembly includes an exhaust pipe, a positioning ring is provided inside the exhaust pipe, a ventilation groove is provided inside the ring wall of the positioning ring, a guide rod is slidably provided at the axis of the positioning ring, and a sealing plate is provided at the bottom end of the guide rod.
[0008] A float assembly is installed at the bottom of the sealing plate.
[0009] Furthermore, the float assembly includes a counterweight rod, which is fixedly connected to the bottom end of the sealing plate, and a float cylinder is provided at the bottom end of the counterweight rod.
[0010] Furthermore, a vent pipe is fixedly installed on the inner wall of the connecting pipe, the vent pipe extends upward to the top of the water storage tank, and there is a gap between the top of the vent pipe and the top wall of the water storage tank.
[0011] Furthermore, the float cylinder has a guide hole inside, the air pipe is inserted into the guide hole, and the float cylinder and the air pipe are slidably connected.
[0012] Furthermore, a limiting platform is provided on the outer peripheral wall of the vent pipe, and there is a gap between the sealing disc and the positioning ring when the float cylinder contacts the limiting platform.
[0013] Furthermore, an insertion part is provided at the top of the sealing disc at a position corresponding to the venting groove.
[0014] In summary, this utility model has at least one of the following beneficial technical effects:
[0015] 1. This energy-saving double-suction pump anti-water shortage device, when there is a cavity inside the volute due to water shortage, opens the water storage valve in the connecting pipe, and water from the water storage tank enters the volute through the connecting pipe, squeezing out the air inside the volute until the water level in the water storage tank stops dropping. At this time, the drive motor and shaft drive the turbine inside the volute to pump water. During pumping, the large water pressure can push the water upward, causing the water flow to enter the water storage tank through the connecting pipe. When the water flow returns to the inside of the water storage tank, the exhaust component will block the exhaust port and close the water storage valve, so that the water storage tank is completely sealed, so that water can be supplied to the volute again when there is a water shortage next time.
[0016] 2. In this energy-saving double-suction pump anti-water shortage device, when water is pumped in the vortex shell, the water pressure will push the water back into the interior of the vortex shell and push the float assembly with the rise of the water level. At this time, the sealing plate will seal the positioning ring again to achieve the purpose of sealing the exhaust pipe. After the exhaust pipe is sealed, the water storage valve will be closed, and the interior of the water storage tank will form a sealed water storage space. Attached Figure Description
[0017] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0018] Figure 1 This is a schematic diagram of the structure of an energy-saving double-suction pump anti-water shortage device according to the present invention.
[0019] Figure 2 This is a schematic diagram of the internal structure of the water storage tank of an energy-saving double-suction pump anti-water shortage device according to this utility model.
[0020] Figure 3 This is a schematic diagram of the exhaust assembly of an energy-saving double-suction pump anti-water shortage device according to the present invention.
[0021] Figure 4 This is a planar sectional view of the exhaust assembly of an energy-saving double-suction pump anti-water shortage device of this utility model when it is turned on.
[0022] Figure 5 This is a plan sectional view of the exhaust assembly of an energy-saving double-suction pump anti-water shortage device of this utility model when it is closed.
[0023] In the diagram, 1. Vortex shell; 2. Fixed bracket; 3. Water tank; 4. Connecting pipe; 5. Exhaust port; 6. Exhaust assembly; 61. Exhaust pipe; 62. Positioning ring; 63. Vent groove; 64. Guide rod; 65. Sealing plate; 66. Insertion part; 7. Float assembly; 71. Counterweight rod; 72. Float cylinder; 73. Guide hole; 8. Vent pipe; 9. Limiting platform. Detailed Implementation
[0024] The present invention will be further described in detail below with reference to the accompanying drawings.
[0025] Example:
[0026] Reference Figures 1-5 The present invention discloses an energy-saving double-suction pump anti-water shortage device, including a vortex shell 1, a fixed bracket 2 is provided on the outer peripheral wall of the vortex shell 1, a shaft for connecting a drive motor is provided inside the vortex shell 1, a water storage tank 3 is provided at the top of the fixed bracket 2, a connecting pipe 4 connected to the vortex shell 1 is provided at the bottom of the water storage tank 3, an exhaust port 5 is provided at the top of the water storage tank 3, and an exhaust component 6 is provided inside the exhaust port 5.
[0027] The exhaust assembly 6 includes an exhaust pipe 61, a positioning ring 62 is provided inside the exhaust pipe 61, a ventilation groove 63 is provided inside the ring wall of the positioning ring 62, a guide rod 64 is slidably provided at the axis of the positioning ring 62, and a sealing plate 65 is provided at the bottom end of the guide rod 64.
[0028] A float assembly 7 is provided at the bottom of the sealing plate 65.
[0029] In this embodiment, as Figure 1 and Figure 2 As shown, when there is a cavity inside the vortex shell 1 due to lack of water, the water storage valve installed in the connecting pipe 4 is opened. At this time, the water inside the water storage tank 3 will flow downward through the connecting pipe 4 and enter the interior of the vortex shell 1. At this time, the air inside the vortex shell 1 will be squeezed out by the water and enter the interior of the water storage tank 3, so that the air inside the vortex shell 1 is discharged. Then, the turbine inside the vortex shell 1 is driven by the drive motor and shaft to achieve the purpose of pumping water. When pumping water, the large water pressure can push the water upward, so that the water flows through the connecting pipe 4 into the water storage tank 3, so that when the vortex shell 1 is short of water again, water can be supplied to the vortex shell 1 again.
[0030] When water is supplied to the volute 1 from the water storage tank 3, the water level moves downward under the influence of gravity. After the water level drops, the sealing plate 65 and the guide rod 64 fall under the influence of gravity, causing the sealing plate 65 to separate from the positioning ring 62. At this time, air can enter the exhaust pipe 61 through the vent groove 63. Figure 4 As shown, when water is pumped into the vortex shell 1, the water pressure will push the water back into the interior of the vortex shell 1 and push the float assembly 7 along with the rise in water level. At this time, the sealing plate 65 will seal the positioning ring 62 again to achieve the purpose of sealing the exhaust pipe 61. After the exhaust pipe 61 is sealed, the water storage valve is closed. At this time, a sealed water storage space is formed inside the water storage tank 3.
[0031] In a further preferred embodiment of this utility model, such as Figure 2 and Figure 3 As shown, the float assembly 7 includes a counterweight rod 71, which is fixedly connected to the bottom end of the sealing plate 65, and a float cylinder 72 is provided at the bottom end of the counterweight rod 71.
[0032] In this embodiment, as Figure 3 As shown, the counterweight rod 71 is used to connect the float 72 to the sealing plate 65. The buoyancy of the float 72 is much greater than the weight of the counterweight rod 71, the sealing plate 65 and the guide rod 64. Therefore, after the water level in the water tank 3 rises and comes into contact with the float 72, it can effectively push the sealing plate 65 upward to cooperate with the positioning ring 62 to achieve the effect of sealing the exhaust pipe 61.
[0033] In a further preferred embodiment of this utility model, such as Figure 3 As shown, a vent pipe 8 is fixedly installed on the inner wall of the connecting pipe 4. The vent pipe 8 extends upward to the top of the water storage tank 3, and there is a gap between the top of the vent pipe 8 and the top wall of the water storage tank 3.
[0034] In this embodiment, as Figure 2 and 3 As shown, the vent pipe 8 is located inside the connecting pipe 4 so that the air inside the vortex shell 1 can flow directly upward, making the water in the water tank 3 flow more smoothly into the vortex shell 1, so as to expel the air inside the vortex shell 1.
[0035] In a further preferred embodiment of this utility model, such as Figure 3 As shown, the float 72 has a guide hole 73 inside, the air pipe 8 is inserted into the guide hole 73, and the float 72 is slidably connected to the air pipe 8.
[0036] In this embodiment, the guide hole 73 is used to slide the float 72 inside the guide hole 73 to guide the float 72. The vent pipe 8 is eccentrically set with the connecting pipe 4, and the positioning ring 62 and the guide rod 64 are coaxially set with the connecting pipe 4, thereby preventing the float 72 from rotating.
[0037] In a further preferred embodiment of this utility model, such as Figure 3 As shown, the outer peripheral wall of the vent pipe 8 is provided with a limiting platform 9, and when the float cylinder 72 contacts the limiting platform 9, there is a gap between the sealing disc 65 and the positioning ring 62.
[0038] In this embodiment, the limiting platform 9 is used to limit the falling length of the float 72, prevent the guide rod 64 from being pulled out of the positioning ring 62, and improve the stability of the float assembly 7 and the guide rod 64.
[0039] In a further preferred embodiment of this utility model, such as Figure 3 As shown, an insertion part 66 is provided at the top of the sealing disc 65 at a position corresponding to the venting groove 63.
[0040] In this embodiment, the insertion part 66 can be inserted into the vent groove 63 when the sealing disc 65 contacts the positioning ring 62, so as to improve the sealing of the positioning ring 62.
[0041] The implementation principle of the above embodiment is as follows: When the water storage tank 3 supplies water to the vortex shell 1, the water level moves downward under the influence of gravity. After the water level drops, the sealing plate 65 and the guide rod 64 fall under the influence of gravity, causing the sealing plate 65 to separate from the positioning ring 62. At this time, air can enter the exhaust pipe 61 through the ventilation groove 63 so that the water in the water storage tank 3 can flow into the interior of the vortex shell 1.
[0042] When water is pumped into the vortex shell 1, the water pressure will push the water back into the interior of the vortex shell 1, and push the float assembly 7 along with the rise in water level. At this time, the sealing plate 65 will seal the positioning ring 62 again to achieve the purpose of sealing the exhaust pipe 61. After the exhaust pipe 61 is sealed, the water storage valve is closed. At this time, the interior of the water storage tank 3 forms a sealed water storage space and can store water inside, so that water can be supplied to the vortex shell 1 when it is short of water next time.
[0043] The embodiments described herein are preferred embodiments of this utility model and are not intended to limit the scope of protection of this utility model. Therefore, all equivalent changes made to the structure, shape, and principle of this utility model should be included within the scope of protection of this utility model.
Claims
1. An energy-saving double-suction pump anti-water shortage device, characterized in that, Includes a vortex shell (1), a fixed bracket (2) is provided on the outer peripheral wall of the vortex shell (1), a shaft for connecting the drive motor is provided inside the vortex shell (1), a water storage tank (3) is provided at the top of the fixed bracket (2), a connecting pipe (4) is provided at the bottom of the water storage tank (3) and communicates with the vortex shell (1), a water storage valve is provided inside the connecting pipe (4), an exhaust port (5) is provided at the top of the water storage tank (3), and an exhaust assembly (6) is provided inside the exhaust port (5). The exhaust assembly (6) includes an exhaust pipe (61), a positioning ring (62) is provided inside the exhaust pipe (61), a ventilation groove (63) is provided inside the ring wall of the positioning ring (62), a guide rod (64) is slidably provided at the axis of the positioning ring (62), and a sealing plate (65) is provided at the bottom end of the guide rod (64). A float assembly (7) is provided at the bottom of the sealing plate (65).
2. The energy-saving double-suction pump anti-water shortage device according to claim 1, characterized in that, The float assembly (7) includes a counterweight rod (71), which is fixedly connected to the bottom end of the sealing plate (65), and a float cylinder (72) is provided at the bottom end of the counterweight rod (71).
3. The energy-saving double-suction pump anti-water shortage device according to claim 2, characterized in that, The inner wall of the connecting pipe (4) is fixedly provided with a vent pipe (8), which extends upward to the top of the water storage tank (3), and there is a gap between the top of the vent pipe (8) and the top wall of the water storage tank (3).
4. The energy-saving double-suction pump anti-water shortage device according to claim 3, characterized in that, The float tube (72) has a guide hole (73) inside, and the air pipe (8) is inserted into the guide hole (73), and the float tube (72) and the air pipe (8) are slidably connected.
5. The energy-saving double-suction pump anti-water shortage device according to claim 4, characterized in that, The outer peripheral wall of the vent pipe (8) is provided with a limiting platform (9), and when the float (72) contacts the limiting platform (9), there is a gap between the sealing plate (65) and the positioning ring (62).
6. The energy-saving double-suction pump anti-water shortage device according to claim 5, characterized in that, An insertion part (66) is provided at the top of the sealing plate (65) at a position corresponding to the venting groove (63).