A device for preventing pump cavitation

Abstract

The application relates to the technical field of preventing pump cavitation, and particularly relates to a device for preventing pump cavitation, which comprises a base, a pump shell mounted on the base, a lower shell body located on the base, an upper shell body detachably mounted on the lower shell body, and a cavitation-preventing mechanism connected with the lower shell body and the upper shell body and communicated with the pump shell, wherein the cavitation-preventing mechanism comprises a defoaming assembly and a cooling assembly; the defoaming assembly is located in the upper shell body, the cooling assembly is located in the lower shell body and connected with the upper shell body, and the cooling assembly is also communicated with the pump shell. The device for preventing pump cavitation has a novel structure, can reduce the cavitation phenomenon, prolong the service life of equipment and provide convenience for workers.

Description

Technical Field

[0001] This invention relates to the technical field of preventing pump cavitation, specifically to a device for preventing pump cavitation. Background Technology

[0002] Centrifugal pumps are widely used in production and daily life. When a centrifugal pump is working, fluid is drawn in from the low-pressure side, then pressurized by a rotating impeller installed in the pump casing and discharged from the high-pressure side. During this process, the fluid gains kinetic energy and static pressure energy. If the pressure of the saturated liquid decreases or the temperature increases before it enters the centrifugal pump, the liquid becomes supersaturated and bubbles overflow. These bubbles flow from the low-pressure side of the pump to the high-pressure side along with the liquid. Under high pressure, the bubbles quickly condense or burst, which causes pump cavitation. In severe cases, the impeller is damaged, and the centrifugal pump cannot operate normally.

[0003] Existing devices for preventing pump cavitation often employ measures to reduce the temperature of the liquid at the pump inlet during operation. However, during the cooling process, uneven or insufficient cooling can still cause air bubbles to overflow into the pump, leading to cavitation. This makes the devices inconvenient to use. Therefore, there is an urgent need to develop a device for preventing pump cavitation to overcome the shortcomings in current practical applications. Summary of the Invention

[0004] The purpose of this invention is to provide a device for preventing pump cavitation, thereby solving the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution:

[0006] A device for preventing pump cavitation includes a base on which a pump housing is mounted, and further includes:

[0007] A lower housing, located on the base, with an upper housing detachably mounted on the lower housing; and

[0008] An anti-cavitation mechanism is provided, which is connected to the lower housing and the upper housing respectively, and communicates with the pump housing. The anti-cavitation mechanism includes an anti-foaming component and a cooling component.

[0009] The defoaming component is located inside the upper housing, and the cooling component is located inside the lower housing and connected to the upper housing. The cooling component is also connected to the pump housing.

[0010] As a further aspect of the present invention: the defoaming component includes:

[0011] A pressure relief pipe and a water inlet pipe, both of which are located on the upper housing;

[0012] A vibrator, connected to the inner wall of the upper housing via a support rod, and located directly below the water inlet pipe; and

[0013] A flexible oscillating plate, which is uniformly distributed circumferentially on the vibrator.

[0014] As a further aspect of the present invention: the number of flexible oscillating plates is several, and each of the several flexible oscillating plates is provided with a magnetic sheet on its sidewall, and the magnetic sheets between adjacent flexible oscillating plates have the same magnetic pole.

[0015] As a further aspect of the present invention: the cooling component includes:

[0016] A connecting pipe, the two ends of which are respectively connected to the pump casing and the lower casing;

[0017] A cooling water jacket, located between the lower housing and the upper housing, and connected to the lower housing and the upper housing by bolts; and

[0018] An arc-shaped intermediate tube passes through the cooling water jacket, and its two ends are respectively connected to the lower shell and the upper shell.

[0019] As a further aspect of the present invention: the number of the arc-shaped intermediate tubes is several, and the several arc-shaped intermediate tubes are distributed in a cross-shaped structure inside the cooling water jacket. The cooling water jacket is composed of two arc-shaped plates with the same structure, which are connected by bolts. The cooling water jacket is also provided with a cooling water inlet and an outlet.

[0020] As a further aspect of the present invention, it also includes: a wave piston, which is slidably mounted within the lower housing;

[0021] A cooling plate extends through the fluctuating piston, and its bottom end is connected to the inner bottom wall of the lower housing via a spring; and

[0022] The spiral-shaped turbulence groove and the turbulence hole are both formed on the cooling plate and located on the upper side of the oscillating piston.

[0023] As a further aspect of the present invention, it further includes: a through hole, said through hole being formed on the side wall of the lower housing, and said through hole being located below the wave piston; and

[0024] A cold air inlet is located at the bottom of the lower housing and is connected to the lower housing.

[0025] As a further aspect of the present invention, it also includes a drive motor, which is located on the base;

[0026] A bearing housing is connected to the pump housing via a flange. A drive shaft is fitted inside the bearing housing. One end of the drive shaft passes through the pump housing and is rotatably connected to it. The other end of the drive shaft is fitted with a universal coupling. The drive shaft is connected to the output shaft of the drive motor.

[0027] The pump casing has an outlet and an inlet, both of which are located on the pump casing, and the inlet is connected to the anti-cavitation mechanism.

[0028] Compared with the prior art, the beneficial effects of the present invention are:

[0029] During the operation of the centrifugal pump unit, external water sources or other liquids can be introduced into the pump unit through the lower and upper casings. After the liquid enters the upper casing, the defoaming component can pre-eliminate air bubbles in the liquid, allowing the defoamed liquid to continue flowing into the lower casing. At this time, with the operation of the cooling component, the temperature of the liquid can be sufficiently reduced, thereby reducing the probability of air bubbles precipitating due to pressure changes after the liquid enters the pump unit. This helps to reduce cavitation, extend the service life of the equipment, and provides convenience for the staff, making it worthy of promotion. Attached Figure Description

[0030] Figure 1 This is a schematic diagram of the overall front view structure in an embodiment of the present invention.

[0031] Figure 2 This is a schematic diagram of the main cross-sectional view of the cooling water jacket in an embodiment of the present invention.

[0032] Figure 3 This is a cross-sectional view of the lower housing portion in an embodiment of the present invention.

[0033] Figure 4 This is a side view of the cooling plate portion in an embodiment of the present invention.

[0034] Figure 5 This is a three-dimensional structural diagram of the flexible oscillating plate portion in an embodiment of the present invention.

[0035] In the diagram: 1-base, 2-drive motor, 3-universal coupling, 4-bearing housing, 5-drive shaft, 6-pump housing, 7-outlet, 8-inlet, 9-connecting pipe, 10-lower housing, 11-through hole, 12-cold air inlet, 13-cooling water jacket, 14-pressure relief pipe, 15-inlet pipe, 16-upper housing, 17-arc-shaped intermediate pipe, 18-cooling plate, 19-wave piston, 20-spring, 21-U-shaped turbulence groove, 22-turbulence hole, 23-vibrator, 24-support rod, 25-flexible oscillating plate. Detailed Implementation

[0036] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0037] The specific implementation of the present invention will be described in detail below with reference to specific embodiments.

[0038] Please see Figure 1-5 An embodiment of the present invention provides a device for preventing pump cavitation, comprising a base 1 on which a pump housing 6 is mounted, and further comprising:

[0039] A lower housing 10, located on the base 1, and an upper housing 16 detachably mounted on the lower housing 10; and

[0040] The anti-cavitation mechanism is connected to the lower housing 10 and the upper housing 16 respectively, and is connected to the pump housing 6. The anti-cavitation mechanism includes an anti-foaming component and a cooling component.

[0041] The defoaming component is located inside the upper housing 16, and the cooling component is located inside the lower housing 10 and connected to the upper housing 16. The cooling component is also connected to the pump housing 6.

[0042] During the operation of the centrifugal pump unit, external water or other liquids can be introduced into the pump unit through the lower housing 10 and upper housing 16. After the liquid enters the upper housing 16, the defoaming component can pre-eliminate the air bubbles in the liquid, allowing the defoamed liquid to continue flowing into the lower housing 10. At this time, with the operation of the cooling component, the temperature of the liquid can be sufficiently reduced, thereby reducing the probability of air bubbles being released due to pressure changes after the liquid enters the pump unit. This helps to reduce cavitation, extend the service life of the equipment, and provides convenience for the staff, making it worthy of promotion.

[0043] In one embodiment of the present invention, please refer to Figure 1 and Figure 5 The defoaming component includes:

[0044] Pressure relief pipe 14 and water inlet pipe 15, both of which are located on the upper housing 16;

[0045] Vibrator 23, which is connected to the inner wall of the upper housing 16 via a support rod 24, and is located directly below the water inlet pipe 15; and

[0046] Flexible oscillating plate 25, which is uniformly distributed circumferentially on the vibrator 23.

[0047] Please see Figure 5 The number of flexible oscillating plates 25 is several, and each of the flexible oscillating plates 25 has a magnetic sheet attached to its sidewall, and the magnetic sheets between adjacent flexible oscillating plates 25 have the same magnetic pole.

[0048] Through the inlet pipe 15, external liquid can flow into the upper housing 16. The upper housing 16 is equipped with a heating device to slightly heat the incoming liquid. At this time, the vibrator 23 is activated. Driven by the vibrator 23, several flexible oscillating plates 25 can vibrate at different frequencies and amplitudes. The flexible oscillating plates 25 can be made of steel sheets. With the cooperation of magnetic sheets, adjacent flexible oscillating plates 25 are prevented from attracting each other under the action of liquid flow. When the liquid passes through the flexible oscillating plates 25, under the action of turbulence and slapping, some bubbles in the liquid can be released, thereby reducing the bubble content in the liquid.

[0049] In one embodiment of the present invention, please refer to Figure 1 and Figure 2 The cooling component includes:

[0050] A connecting pipe 9, the two ends of which are respectively connected to the pump casing 6 and the lower casing 10;

[0051] A cooling water jacket 13 is located between the lower housing 10 and the upper housing 16, and is connected to the lower housing 10 and the upper housing 16 by bolts; and

[0052] An arc-shaped intermediate tube 17 passes through the cooling water jacket 13, and both ends of the arc-shaped intermediate tube 17 are connected to the lower shell 10 and the upper shell 16, respectively.

[0053] Please see Figure 2 The number of the arc-shaped intermediate tubes 17 is several, and the several arc-shaped intermediate tubes 17 are distributed in a cross-shaped structure inside the cooling water jacket 13. The cooling water jacket 13 is composed of two arc-shaped plates with the same structure. The two arc-shaped plates with the same structure are connected by bolts, and the cooling water jacket 13 is also provided with a cooling water inlet and an outlet.

[0054] Please see Figure 1 , Figure 3 and Figure 4It also includes: a wave piston 19, which is slidably mounted inside the lower housing 10;

[0055] A cooling plate 18 extends through the fluctuating piston 19, and the bottom end of the cooling plate 18 is connected to the inner bottom wall of the lower housing 10 via a spring 20; and

[0056] The spiral-shaped turbulence groove 21 and the turbulence hole 22 are both formed on the cooling plate 18 and located on the upper side of the wave piston 19.

[0057] Please see Figure 1 and Figure 3 It also includes: a through hole 11, which is formed on the side wall of the lower housing 10 and is located below the wave piston 19; and

[0058] Cold air inlet 12 is located at the bottom of the lower housing 10 and is connected to the lower housing 10.

[0059] After the liquid passes through the flexible oscillating plate 25, it flows to the bottom of the upper housing 16. At this point, through several arc-shaped intermediate tubes 17, the liquid in the upper housing 16 is divided into multiple parts, thereby increasing the contact area with the cooling water in the cooling water jacket 13 and improving the cooling effect. When maintenance of the arc-shaped intermediate tubes 17 is required, the bolts on the cooling water jacket 13 can be removed, allowing the two arc-shaped plates of the same structure to be separated, thus enabling the replacement and maintenance of the arc-shaped intermediate tubes 17. After the liquid is cooled for the first time through the arc-shaped intermediate tubes 17, it continues to flow to the bottom of the lower housing 10 until it falls on the wave piston 19. The wave piston 19 can be located in the lower housing... The inner wall of body 10 slides within a very small range and is sealed to the inner wall of the wave piston 19. Under the impact of the liquid flow and the elasticity of the spring 20, the wave piston 19 and the cooling plate 18 will produce a small wave, which allows the liquid to fully contact the cooling plate 18 on the upper part of the wave piston 19, which is beneficial to further improve the cooling effect of the liquid. In addition, through the cold air inlet 12, external cooling air can be introduced into the lower housing 10 and discharged from the through hole 11. On the one hand, it can cool the cooling plate 18, and on the other hand, it can adjust the degree of wave of the wave piston 19 to meet the needs of time operation, thus improving the practicality and flexibility of the equipment.

[0060] In one embodiment of the present invention, please refer to Figure 1 It also includes: a drive motor 2, which is located on the base 1;

[0061] A bearing housing 4 is connected to the pump housing 6 via a flange. A drive shaft 5 is fitted inside the bearing housing 4. One end of the drive shaft 5 passes through the pump housing 6 and is rotatably connected to it. The other end of the drive shaft 5 is fitted with a universal coupling 3. The drive shaft 5 is connected to the output shaft of the drive motor 2.

[0062] The outlet 7 and the inlet 8 are both located on the pump casing 6, and the inlet 8 is connected to the anti-cavitation mechanism.

[0063] When the pump unit is working, the drive motor 2 is started, which can drive the transmission shaft 5 to rotate in the bearing housing 4. The bearing housing 4 is equipped with components such as thrust bearing and bearing cover to ensure the normal operation of the transmission shaft 5. When the transmission shaft 5 rotates, it can drive the impeller in the pump housing 6 to rotate, thereby drawing the liquid in the lower housing 10 into the pump housing 6 through the connecting pipe 9 and the inlet 8, and then discharging it to the outside through the outlet 7.

[0064] In summary, during the operation of the centrifugal pump unit, external water sources or other liquids can be introduced into the pump unit through the lower housing 10 and upper housing 16. After the liquid enters the upper housing 16, the defoaming component can pre-eliminate air bubbles in the liquid, allowing the defoamed liquid to continue flowing into the lower housing 10. At this time, with the operation of the cooling component, the temperature of the liquid can be sufficiently reduced, thereby reducing the probability of air bubbles precipitating due to pressure changes after the liquid enters the pump unit. This helps to reduce cavitation, extend the service life of the equipment, and provide convenience for the staff.

[0065] It should be noted that, in this invention, unless otherwise explicitly specified and limited, the terms "sliding," "rotating," "fixed," and "equipped" should be interpreted broadly. For example, they can refer to welded connections, bolted connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0066] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. An apparatus for preventing pump cavitation comprising a base on which is mounted a pump housing, characterised in that, Also include: Lower shell, the lower shell is located on the base, and the upper shell is detachably mounted on the lower shell; and Prevent cavitation mechanism, the prevent cavitation mechanism is connected with the lower shell and the upper shell respectively, and is communicated with the pump shell, wherein the prevent cavitation mechanism comprises a defoaming assembly and a cooling assembly; The defoaming assembly is located in the upper shell, the cooling assembly is located in the lower shell and is connected with the upper shell, and the cooling assembly is also communicated with the pump shell; The defoaming assembly comprises a pressure relief pipe and a water inlet pipe, and the pressure relief pipe and the water inlet pipe are located on the upper shell; Vibrator, the vibrator is connected with the inner wall of the upper shell through a support rod, and the vibrator is located directly below the water inlet pipe; and Flexible oscillating sheet, the flexible oscillating sheet is uniformly distributed on the vibrator; The number of the flexible oscillating sheet is several, the side wall of the flexible oscillating sheet is provided with a magnetic sheet, and the magnetic sheets between adjacent flexible oscillating sheets are of the same magnetic pole. The cooling assembly comprises a communication pipe, and the two ends of the communication pipe are connected with the pump shell and the lower shell respectively; Cooling water jacket, the cooling water jacket is located between the lower shell and the upper shell, and is connected with the lower shell and the upper shell through bolts; and Arc-shaped intermediate pipe, the arc-shaped intermediate pipe penetrates the cooling water jacket, and the two ends of the arc-shaped intermediate pipe are connected with the lower shell and the upper shell respectively.

2. The device for preventing pump cavitation according to claim 1, characterized in that, The number of the arc-shaped intermediate pipe is several, the several arc-shaped intermediate pipes are distributed in the cooling water jacket in a cross structure, the cooling water jacket is composed of two arc-shaped plates with the same structure, the two arc-shaped plates with the same structure are connected through bolts, and the cooling water jacket is also provided with a cooling water inlet and an outlet.

3. The device for preventing pump cavitation according to claim 1, wherein Also include: Wave piston, the wave piston is slidingly installed in the lower shell; Cooling plate, the cooling plate penetrates the wave piston, and the bottom end of the cooling plate is connected with the inner bottom wall of the lower shell through a spring; And Back-shaped spoiler groove and spoiler hole, the back-shaped spoiler groove and the spoiler hole are both provided on the cooling plate and are located on the upper side of the wave piston.

4. The device for preventing pump cavitation according to claim 3, characterized in that, Also include: Through hole, the through hole is provided on the side wall of the lower shell, and the through hole is located on the lower side of the wave piston; And Cold air inlet, the cold air inlet is located at the bottom of the lower shell and is communicated with the lower shell.

5. The device for preventing pump cavitation according to claim 1, wherein Also include: Driving motor, the driving motor is located on the base; Bearing shell, the bearing shell is connected with the pump shell through a flange, a transmission shaft is sleeved in the bearing shell, one end of the transmission shaft penetrates the pump shell and is rotatably connected with the pump shell, the other end of the transmission shaft is provided with a universal joint, and the transmission shaft is connected with the output shaft of the driving motor; and Water outlet and water inlet, the water outlet and the water inlet are both located on the pump shell, and the water inlet is connected with the prevent cavitation mechanism.

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