Multi-section water pump

Abstract

The utility model discloses a multi-section type water pump which comprises a transmission seat, an outlet guide cover, a plurality of sectional pump sets and a plurality of centrifugal pump feeding assemblies, the sectional pump sets and the centrifugal pump feeding assemblies are arranged in a one-to-one correspondence mode, and the centrifugal pump feeding assemblies are fixedly installed on the inner sides of the sectional pump sets. A transmission gear set is arranged on the inner side of the transmission base, a driving motor is fixedly connected to one side of the transmission base, the segmented pump set comprises a plurality of pump boxes, and a sealing gland is fixedly installed on one side of each pump box. According to the utility model, a novel split combined structure is arranged, a plurality of sectional pump sets are mutually spliced and combined under the fastening of the pull rod screw rod to form a complete pump body structure with the transmission seat and the outlet guide cover, and the split transmission connection of the driving motor is matched, so that the quick assembly of the whole pump body and the independent disassembly of the sectional pump sets are realized; and therefore, the multi-section pump is applied to different use scenes by changing the number of the sectional pump sets or changing the driving motor, so that the practicability of the multi-section pump is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of multi-stage water pumps, in particular to a multi-stage water pump. Background Art

[0002] Multistage pumps, also known as multi-stage pumps, are a type of centrifugal pump. They also rely on the rotation of the impeller to obtain centrifugal force to transport materials. When the gas density reaches the working range of the mechanical vacuum pump, it is extracted, thereby gradually obtaining a high vacuum. Multistage pumps are widely used and can remove flammable and explosive gases. In addition, they can also remove dusty and water-containing gases.

[0003] Existing multi-stage water pumps mostly adopt an integrated structure, that is, the number of centrifugal discs in a single pump body is fixed, and the number of suction action intervals is fixed, so the use is limited. In specific scenarios, the pumping power can only be adjusted by adjusting the motor power. Using it at non-rated power is likely to cause damage to the pump motor and reduce its service life. In view of this, the existing problems are studied and improved, and a multi-stage water pump is provided to solve the current problems, aiming to achieve the purpose of solving problems and improving practical value through this technology. Utility Model Content

[0004] The utility model aims to solve one of the technical problems existing in the prior art or related technology.

[0005] To this end, the technical solution adopted by the utility model is: a multi-stage water pump, comprising: a transmission seat, an outlet guide cover, a segmented pump group and a centrifugal pumping assembly, the number of the segmented pump group and the centrifugal pumping assembly is several and arranged one by one, the centrifugal pumping assembly is fixedly installed on the inner side of the segmented pump group, the inner side of the transmission seat is provided with a transmission gear group and one side is fixedly connected with a drive motor, the segmented pump group comprises several pump boxes, one side of the pump box is fixedly installed with a sealing gland, the centrifugal pumping assembly comprises a flange cover, a centrifugal impeller and a liquid guide box, the centrifugal impeller is rotatably installed on the inner side of the flange cover and the liquid guide box, the surfaces of the flange cover and the sealing gland are both provided with a liquid inlet, the surface of the liquid guide box is provided with a plurality of liquid inlet grooves close to the periphery, the two sides of the centrifugal impeller are respectively provided with a convex shaft rod and a centrifugal impeller, one side of the liquid guide box is provided with a static guide vane, a section of the convex shaft rod passes through the flange cover and the sealing gland, and the surface of the liquid guide box is provided with an axial hole for penetrating the convex shaft rod.

[0006] In a preferred example, the utility model can be further configured as follows: a flexible coupling connected to the output end of the drive motor is provided on one side of the transmission seat, the output end of the transmission seat is located on the same straight line as the axis of the centrifugal pumping assembly and is provided with a convex shaft for engaging with the plug-in groove, and the convex shaft and the convex shaft rod structure are of the same size.

[0007] In a preferred example, the utility model can be further configured as follows: the surface of the pump box is provided with a plurality of evenly distributed engaging holes, the surfaces of the transmission seat and the outlet guide cover are provided with through holes matched with the respective engaging holes, and are provided with screw pull rods for through-installation.

[0008] In a preferred example, the utility model can be further configured as follows: a liquid outlet is provided on the surface of the transmission seat, a liquid inlet end tube is provided on the surface of the outlet guide cover, and a section of the liquid inlet end tube extends to the axis of the outlet guide cover.

[0009] In a preferred example, the utility model can be further configured as follows: a sealing gasket layer is provided on the surface of the pump box, and adjacent surfaces of the pump boxes are spliced ​​and joined to each other through the sealing gasket layer.

[0010] In a preferred example, the utility model can be further configured as follows: the liquid inlet grooves are evenly distributed in the circumferential direction, and the center distance between the liquid inlet grooves and the liquid guide box is greater than or equal to the radius of the centrifugal impeller.

[0011] In a preferred example, the utility model can be further configured as follows: one side of the liquid guide box is sealed and connected to the outer edge of the flange cover, and the other side of the liquid guide box is a disc cavity structure, and the thickness of the disc cavity is equal to the protruding height of the static guide vane.

[0012] The beneficial effects achieved by the utility model are:

[0013] 1. In the utility model, a new type of split combination structure is set up, and a plurality of segmented pump groups are spliced ​​and combined with a transmission seat and an outlet guide cover under the fastening of a tie rod screw to form a complete pump body structure, and cooperate with the split transmission connection of the driving motor to achieve rapid assembly of the entire pump body and independent disassembly of the segmented pump groups. Then, by replacing the number of segmented pump groups or the driving motor, it can be applied to different usage scenarios to improve the practicality of the multi-stage pump.

[0014] 2. In the utility model, the medium is transported by axially splicing the centrifugal impellers inside the multiple segmented pump groups and centrifugal conduction of the medium between the flange cover and the liquid guide box. Linear conduction is performed between the multiple segmented pump groups and the centrifugal pumping components. The structure is simple and the delivery volume is stable. Multi-stage centrifugal pressurization is performed on the medium transmission to improve the delivery efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of the overall structure of an embodiment of the utility model;

[0016] Figure 2 This is a schematic diagram of the cross-sectional structure of an embodiment of the utility model;

[0017] Figure 3 This is a schematic diagram of the structure of both sides of a segmented pump unit in one embodiment of the utility model;

[0018] Figure 4 This is a schematic diagram of the exploded structure of a centrifugal pumping assembly according to an embodiment of the utility model;

[0019] Figure 5 This is a schematic diagram of the back structure of a liquid guiding box according to an embodiment of the utility model.

[0020] Reference numerals:

[0021] 100, transmission seat; 110, driving motor;

[0022] 200, outlet guide cover; 210, liquid inlet end pipe;

[0023] 300, segmented pump assembly; 310, pump box; 311, joint hole; 312, sealing gland;

[0024] 400, centrifugal pumping assembly; 410, flange cover; 420, centrifugal impeller; 430, liquid guide box; 411, liquid inlet; 421, convex shaft rod; 422, plug-in slot; 431, liquid inlet slot; 432, static guide vane. DETAILED DESCRIPTION

[0025] In order to make the purpose, technical solution and advantages of the utility model clearer, the utility model is further described in detail below in combination with specific implementation methods and with reference to the accompanying drawings. It should be noted that the embodiments of the utility model and the features in the embodiments can be combined with each other without conflict.

[0026] A multi-stage water pump provided by some embodiments of the utility model is described below in conjunction with the accompanying drawings.

[0027] Combination Figure 1-5As shown, the utility model provides a multi-stage water pump, comprising: a transmission seat 100, an outlet guide cover 200, a segmented pump group 300 and a centrifugal pumping assembly 400, the segmented pump group 300 and the centrifugal pumping assembly 400 are arranged in a one-to-one correspondence, the centrifugal pumping assembly 400 is fixedly installed on the inner side of the segmented pump group 300, the inner side of the transmission seat 100 is provided with a transmission gear group and one side is fixedly connected to a drive motor 110, the segmented pump group 300 includes a plurality of pump boxes 310, one side of the pump box 310 is fixedly installed with a sealing gland 312, and the centrifugal pumping assembly 400 includes a flange cover 410 , a centrifugal impeller 420 and a liquid guide box 430, the centrifugal impeller 420 is rotatably installed on the inner sides of the flange cover 410 and the liquid guide box 430, the surfaces of the flange cover 410 and the sealing cover 312 are provided with a liquid inlet 411, the surface of the liquid guide box 430 is provided with a plurality of liquid inlet grooves 431 close to the periphery, the centrifugal impeller 420 is provided with a convex shaft rod 421 and a centrifugal impeller 420 on both sides, a static guide vane 432 is provided on one side of the liquid guide box 430, a section of the convex shaft rod 421 passes through the flange cover 410 and the sealing cover 312, and the surface of the liquid guide box 430 is provided with an axial hole for inserting the convex shaft rod 421.

[0028] In this embodiment, a flexible coupling connected to the output end of the drive motor 110 is provided on one side of the transmission seat 100. The output end of the transmission seat 100 is located on the same straight line as the axis of the centrifugal pumping assembly 400 and is provided with a convex shaft for engaging with the plug-in groove 422. The convex shaft and the convex shaft rod 421 have the same structure and size.

[0029] In this embodiment, the surface of the pump box 310 is provided with a plurality of evenly distributed engagement holes 311, and the surfaces of the transmission seat 100 and the outlet guide cover 200 are provided with through holes adapted to the respective engagement holes 311, and are provided with screw rods for through-installation.

[0030] Specifically, under the penetration and tightening of the screw rod, the transmission seat 100, the outlet guide cover 200 and the plurality of segmented pump groups 300 are spliced ​​and assembled.

[0031] In this embodiment, a liquid outlet is provided on the surface of the transmission seat 100 , and a liquid inlet end tube 210 is provided on the surface of the outlet guide cover 200 . A section of the liquid inlet end tube 210 extends to the axis of the outlet guide cover 200 .

[0032] In this embodiment, a sealing gasket layer is provided on the surface of the pump box 310, and the surfaces of adjacent pump boxes 310 are spliced ​​and joined to each other through the sealing gasket layer.

[0033] Specifically, the sealing effect of each segmented pump group 300 after being spliced ​​and combined is improved.

[0034] In this embodiment, the liquid inlet grooves 431 are evenly distributed in the circumferential direction, and the distance between the center of the liquid inlet grooves 431 and the liquid guide box 430 is greater than or equal to the radius of the centrifugal impeller 420 .

[0035] Specifically, the water centrifuged by the centrifugal impeller 420 can be smoothly introduced into the liquid inlet groove 431 , and enter the other side of the liquid guide box 430 through the liquid inlet groove 431 .

[0036] In this embodiment, one side of the liquid guide box 430 is sealed to the outer edge of the flange cover 410 , and the other side of the liquid guide box 430 is a disc cavity structure, and the thickness of the disc cavity is equal to the protruding height of the static guide vane 432 .

[0037] Specifically, it moves centrifugally under the action of the convex shaft rod 421, passes through the liquid inlet groove 431 to enter the liquid guide box 430, moves back to the axis center under the guidance of the static guide vane 432, and enters the next-level liquid guide box 430 through the next-level liquid inlet 411, and performs linear conduction between multiple segmented pump groups 300 and the centrifugal pumping assembly 400. It has a simple structure and a stable delivery capacity, and performs multi-stage centrifugal pressurization on the medium transmission.

[0038] The working principle and use process of this utility model:

[0039] When using the multi-stage water pump, according to the set medium delivery head and efficiency, select a suitable number of segmented pump groups 300 and a drive motor 110 with suitable specifications and power parameters, and use the screw rod to sequentially penetrate the transmission seat 100, the engagement holes 311 on the surface of multiple segmented pump groups 300, and the surface of the outlet guide cover 200 for fastening, so that the convex shaft rod 421 at the output end of the transmission seat 100, the convex shaft rod 421 on the surface of the adjacent centrifugal pumping assembly 400, and the plug-in groove 422 are plugged and combined with each other to form an integral structure, and a multi-stage pump body is constructed. Under the drive of the drive motor 110, the pump body is driven by the drive motor 110. The centrifugal impellers 420 inside the multiple liquid guide boxes 430 are driven to rotate. During the high-speed rotation of the liquid guide box 430, the medium enters from the liquid inlet end tube 210 and enters the liquid guide box 430 through the liquid inlet port 411, undergoes centrifugal movement under the action of the convex shaft rod 421, passes through the liquid inlet groove 431 and enters the liquid guide box 430, moves back to the axis under the guidance of the static guide vane 432 and enters the next-stage liquid guide box 430 through the next-stage liquid inlet port 411, repeats the centrifugal pressurization process, and is finally discharged from the liquid outlet on the surface of the transmission seat 100 to perform multi-stage pumping of the medium.

[0040] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and purpose of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A multi-stage water pump, characterized in that: include: A transmission seat (100), an outlet guide cover (200), a segmented pump group (300) and a centrifugal pumping assembly (400), wherein the segmented pump group (300) and the centrifugal pumping assembly (400) are arranged in a one-to-one correspondence, the centrifugal pumping assembly (400) is fixedly installed on the inner side of the segmented pump group (300), the inner side of the transmission seat (100) is provided with a transmission gear group and one side is fixedly connected to a drive motor (110), the segmented pump group (300) comprises a plurality of pump boxes (310), one side of the pump box (310) is fixedly installed with a sealing gland (312), the centrifugal pumping assembly (400) comprises a flange cover (410), a centrifugal impeller (420) and a liquid guide box (4 30), the centrifugal impeller (420) is rotatably mounted on the inner sides of the flange cover (410) and the liquid guide box (430), the surfaces of the flange cover (410) and the sealing gland (312) are both provided with a liquid inlet (411), the surface of the liquid guide box (430) is provided with a plurality of liquid inlet grooves (431) close to the periphery, the two sides of the centrifugal impeller (420) are respectively provided with a convex shaft rod (421) and the centrifugal impeller (420), one side of the liquid guide box (430) is provided with a static guide vane (432), a section of the convex shaft rod (421) passes through the flange cover (410) and the sealing gland (312), and the surface of the liquid guide box (430) is provided with an axial hole for inserting the convex shaft rod (421).

2. A multi-stage water pump according to claim 1, characterized in that: A flexible coupling connected to the output end of the drive motor (110) is provided on one side of the drive seat (100); the output end of the drive seat (100) is located on the same straight line as the axis of the centrifugal pumping assembly (400) and is provided with a convex shaft for engaging with the insertion groove (422); the convex shaft and the convex shaft rod (421) have the same structure and size.

3. A multi-stage water pump according to claim 1, characterized in that: The surface of the pump box (310) is provided with a plurality of evenly distributed engagement holes (311), and the surfaces of the transmission seat (100) and the outlet guide cover (200) are provided with through holes matching the respective engagement holes (311), and are provided with screw rods for penetrating installation.

4. A multi-stage water pump according to claim 1, characterized in that: A liquid outlet is provided on the surface of the transmission seat (100), and a liquid inlet end tube (210) is provided on the surface of the outlet guide cover (200), wherein a section of the liquid inlet end tube (210) extends to the axis of the outlet guide cover (200).

5. A multi-stage water pump according to claim 1, characterized in that: A sealing gasket layer is provided on the surface of the pump box (310), and adjacent surfaces of the pump boxes (310) are spliced ​​and joined to each other via the sealing gasket layer.

6. A multi-stage water pump according to claim 1, characterized in that: The liquid inlet grooves (431) are evenly distributed in the circumferential direction, and the distance between the centers of the liquid inlet grooves (431) and the liquid guide box (430) is greater than or equal to the radius of the centrifugal impeller (420).

7. A multi-stage water pump according to claim 1, characterized in that: One side of the liquid guide box (430) is sealed to the outer edge of the flange cover (410), and the other side of the liquid guide box (430) is in a disc cavity structure, and the thickness of the disc cavity is equal to the protruding height of the static guide vane (432).

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