Multi-inlet and multi-outlet impeller centrifugal pump

Abstract

The utility model relates to the technical field of centrifugal pumps, in particular to a multi-inlet and multi-outlet impeller centrifugal pump which comprises a pump body, a rotating shaft is rotatably arranged in the pump body, a motor is fixedly arranged in the pump body and used for driving the rotating shaft to rotate, and a plurality of cavities are distributed in the pump body in the axis direction of the rotating shaft at intervals. The cavity is formed in a cylindrical shape; impellers are arranged in the cavities, the rotating shaft extends into all the cavities, and all the impellers are fixedly installed on the rotating shaft; the pump body is provided with a plurality of water inlets and water outlets which are communicated with the exterior of the pump body and the interior of the cavity, the water inlets, the water outlets and the cavity are in one-to-one correspondence, the ends, close to the cavity, of the water inlets extend to the middle of the end wall of the cavity, and the ends, close to the cavity, of the water outlets extend to the side wall of the cavity. The centrifugal pump has the beneficial effects that multiple different liquids can be conveniently extracted at the same time through one centrifugal pump, and the production and maintenance cost is reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of centrifugal pumps, in particular to a multi-inlet and multi-outlet impeller centrifugal pump. BACKGROUND

[0002] A centrifugal pump is a common water pump, which is commonly used in industrial production, agricultural irrigation, household water equipment, etc. The centrifugal pump is widely used due to its simple structure and low cost. The common centrifugal pump drives the impeller to rotate at high speed to generate centrifugal force, thereby guiding the flow of liquid.

[0003] In the implementation of the present application, it is found that at least the following problems exist in the prior art: The common centrifugal pump has only one water inlet and one water outlet. When multiple different liquids need to be pumped, a corresponding number of centrifugal pumps need to be provided, which is high in production and maintenance cost. CONTENT OF THE INVENTION

[0004] In order to facilitate the simultaneous pumping of multiple different liquids by one centrifugal pump and reduce the production and maintenance cost, the present application provides a multi-inlet and multi-outlet impeller centrifugal pump.

[0005] The multi-inlet and multi-outlet impeller centrifugal pump provided by the present application adopts the following technical solution:

[0006] A multi-inlet and multi-outlet impeller centrifugal pump, comprising a pump body, a rotating shaft is rotatably arranged in the pump body, a motor is fixedly arranged in the pump body, the motor is used to drive the rotating shaft to rotate, a plurality of chambers are spaced apart along the axis direction of the rotating shaft inside the pump body, the chambers are cylindrically arranged; an impeller is arranged in each chamber, the rotating shaft extends into all the chambers, and all the impellers are fixedly installed on the rotating shaft; a plurality of water inlets and water outlets are arranged on the pump body, which communicate between the outside of the pump body and the inside of the chambers, the water inlets, the water outlets and the chambers are in one-to-one correspondence, the water inlets extend to the middle part of the end wall of the chambers near one end of the chambers, and the water outlets extend to the side wall of the chambers near one end of the chambers.

[0007] By adopting the above technical solution, when different liquids need to be pumped, the corresponding liquids can be introduced into the corresponding chambers through different water inlets. After the motor drives the rotating shaft to rotate, all the impellers are driven to rotate to generate centrifugal force, so that the liquid flows from the middle part to the side in the respective chambers, and finally is discharged from the corresponding water outlet. Thus, the function of using one centrifugal pump to pump and transport multiple different liquids is realized, the high cost problem caused by the provision of multiple centrifugal pumps is avoided, the production and maintenance cost is reduced, and the economic efficiency and convenience of equipment use are improved.

[0008] As preferred, the pump body comprises a plurality of cover segments arranged along the axis of the rotating shaft in sequence, and the adjacent cover segments are detachably connected and fixed, and the chambers are formed by the adjacent cover segments.

[0009] By using the above technical scheme, when a chamber of the centrifugal pump or a component inside the chamber needs to be repaired or replaced due to failure, the adjacent cover segment corresponding to the chamber with the problem is disassembled, and the fault part can be conveniently repaired or the damaged component can be replaced.

[0010] As preferred, the cover segments are sequentially divided into a rear cover and a plurality of connecting pump covers along the axis of the rotating shaft, the motor is embedded in the rear cover, the connecting pump cover is provided with a recess at one end close to the pump cover, and the recess of the connecting pump cover is closed by the end wall of the adjacent cover segment to form a chamber.

[0011] By using the above technical scheme, the motor is embedded in the rear cover, which can protect the motor and provide a stable reference for the installation of the subsequent connecting pump cover. The connecting pump cover is provided with a recess, and the chamber is formed by closing the recess with the end wall of the adjacent cover segment. When the two cover segments are disassembled, the cover segment with the recess is removed, the components in the chamber are located on the end wall of the adjacent cover segment, and are completely exposed, which is convenient for repair or installation.

[0012] As preferred, the connecting pump cover is provided with a connecting through hole, the rear cover is provided with a threaded hole, the pump body is provided with a bolt rod, one end of the bolt rod is fixedly provided with a nut, the nut abuts against the connecting pump cover farthest from the pump cover, the middle part of the bolt rod passes through the connecting through holes of all the connecting pump covers, and the other end of the bolt rod extends into the threaded hole and is screwed with the threaded hole.

[0013] By using the above technical scheme, when assembling the pump body, the bolt rod only needs to pass through the connecting through holes of the connecting pump covers in sequence, and finally be screwed into the threaded hole of the rear cover. The nut is used to press the outermost connecting pump cover, so that the assembly of the entire pump body can be quickly completed, the operation is convenient and efficient, and the production and assembly efficiency is improved. Moreover, when disassembling and repairing, the nut is unscrewed and the bolt rod is extracted, so that the cover segments can be separated in sequence, and the chambers can be conveniently repaired and maintained.

[0014] As preferred, one of the cover segments is provided with an annular groove at the end, and the other cover segment is integrally formed with a positioning ring, the positioning ring and the annular groove are matched with each other, and the positioning ring is inserted into the annular groove.

[0015] By using the above technical scheme, during the connection of the adjacent cover segments, the positioning ring is inserted into the annular groove, which can be accurately positioned to ensure the coaxiality of all the chambers.

[0016] Preferably, a sealing ring is arranged between the adjacent cover joints, the sealing ring is installed in the annular groove, one side of the sealing ring abuts against the annular groove, and the other side of the sealing ring abuts against the positioning ring.

[0017] By adopting the above technical scheme, the sealing ring fills the small gap between the adjacent cover joints, further enhances the sealing performance of the pump body, prevents liquid from leaking between the chambers or leaking outward, and installs the sealing ring in the annular groove, so that the installation position is fixed and not easy to shift or fall off. Meanwhile, the annular groove and the positioning ring are used to extrude the sealing ring from both sides, so that the sealing ring is always in a good sealing state.

[0018] Preferably, the impeller comprises an upper cover, a lower cover, a shaft cylinder and blades, the shaft cylinder is fixedly installed on the rotating shaft, the lower cover is fixedly connected with the shaft cylinder at the middle part, a plurality of blades are fixedly arranged on the end face of the lower cover, all the blades are uniformly distributed in the circumferential direction of the shaft cylinder, the upper cover is fixedly arranged on the side of all the blades away from the lower cover, and a water inlet cavity is left between the middle part of the upper cover and the shaft cylinder for liquid to enter between the upper cover and the lower cover.

[0019] By adopting the above technical scheme, when liquid enters the chamber from the water inlet, most of the liquid enters between the upper cover and the lower cover through the water inlet cavity between the middle part of the upper cover and the shaft cylinder, which provides an initial condition for the centrifugal force generated by the rotation of the blades to push the liquid to flow, and the upper cover and the lower cover are located on both sides of the blades. When the liquid is guided to flow by the blades, the liquid is limited by the upper cover and the lower cover, and the axial impact on the whole impeller is small.

[0020] Preferably, the water inlet is provided with a flared portion at one end facing the chamber, the middle part of the upper cover is provided with a protrusion, and the protrusion extends into the flared portion.

[0021] By adopting the above technical scheme, the protrusion of the upper cover extends into the flared portion, which can guide the flow of the entering liquid and guide the liquid to flow to the water inlet cavity more preferentially.

[0022] In summary, the present application has at least one of the following beneficial technical effects:

[0023] 1. By arranging the rotating shaft and corresponding chambers, impellers, water inlets and water outlets, the function of using one centrifugal pump to extract and transport multiple different liquids is realized, the production and maintenance costs are reduced, and the economic efficiency and convenience of equipment use are improved.

[0024] 2. By arranging the rear cover, the connecting pump cover, the connecting through hole, the threaded hole, the bolt rod and the nut, it is convenient to open each chamber, the assembly efficiency of the centrifugal pump is improved, and it is also convenient to overhaul and maintain the interior of the pump body.

[0025] 3. By setting the upper vane cover, the lower vane cover, the shaft cylinder, the vane, and the water inlet cavity, most of the liquid entering the chamber from the water inlet will enter between the upper vane cover and the lower vane cover through the water inlet cavity between the middle of the upper vane cover and the shaft cylinder, and the liquid is limited by the upper vane cover and the lower vane cover when being guided to flow by the vane, so that the axial impact on the whole impeller is small. BRIEF DESCRIPTION OF DRAWINGS

[0026] Figure 1 is a structural schematic diagram of a multi-in multi-out impeller centrifugal pump provided in the embodiments of the present application.

[0027] Figure 2 is a cutaway structural schematic diagram of a multi-in multi-out impeller centrifugal pump provided in the embodiments of the present application.

[0028] Figure 3 is Figure 2 is an enlarged view of part A in

[0029] Figure 4 is an exploded view of a multi-in multi-out impeller centrifugal pump provided in the embodiments of the present application.

[0030] Figure 5 is a structural schematic diagram of an impeller in the embodiments of the present application.

[0031] BRIEF DESCRIPTION OF DRAWINGS: 1, pump body; 11, rear cover; 111, threaded hole; 12, connecting pump cover; 121, connecting through hole; 122, water inlet; 123, water outlet; 124, flared portion; 13, annular groove; 131, sealing ring; 14, positioning ring; 15, bolt rod; 151, nut; 16, chamber; 2, rotating shaft; 3, motor; 4, impeller; 41, upper vane cover; 411, protrusion; 42, lower vane cover; 43, shaft cylinder; 44, vane; 45, water inlet cavity. DETAILED DESCRIPTION

[0032] The following will be described in detail in combination with the accompanying Figures 1-5 The present application will be further described in detail.

[0033] The embodiments of the present application disclose a multi-in multi-out impeller centrifugal pump. Referring to Figures 1 to 2It comprises a pump body 1, a rotating shaft 2 is arranged in the pump body 1, a motor 3 is fixedly arranged in the pump body 1, and the motor 3 is used for driving the rotating shaft 2 to rotate. In the embodiment, the rotating shaft 2 is a driving shaft of the motor 3. A plurality of chambers 16 are arranged in the pump body 1 along the axial direction of the rotating shaft 2, and the chambers 16 are cylindrically arranged. Impellers 4 are arranged in the chambers 16, the rotating shaft 2 extends into all the chambers 16, and all the impellers 4 are fixedly arranged on the rotating shaft 2. In the embodiment, the impellers 4 are arranged on the rotating shaft 2 by means of key connection. A plurality of water inlets 122 and water outlets 123 are arranged on the pump body 1, and the water inlets 122, the water outlets 123 and the chambers 16 are in one-to-one correspondence. The water inlets 122 extend to the middle part of the end wall of the chambers 16, and the water outlets 123 extend to the side wall of the chambers 16.

[0034] With reference to Figures 1 to 2 When different liquids are to be pumped, the motor 3 drives the rotating shaft 2 to rotate, and drives all the impellers 4 to rotate to generate centrifugal force. Different liquids can be introduced into corresponding chambers 16 through different water inlets 122, so that the liquids flow from the middle part to the side in the respective chambers 16, and finally are discharged from the corresponding water outlets 123, thereby realizing the function that one centrifugal pump can be used to pump and convey multiple different liquids.

[0035] In order to facilitate opening or closing the chambers 16 for maintenance of the centrifugal pump, with reference to Figures 2 to 4 , the pump body 1 comprises a plurality of cover segments arranged along the axial direction of the rotating shaft 2, and adjacent cover segments are detachably connected and fixed. The chambers 16 are formed by adjacent cover segments. Specifically, the cover segments are sequentially divided into a rear cover 11, a plurality of connecting covers 12 along the axial direction of the rotating shaft 2. The motor 3 is embedded in the rear cover 11. The connecting covers 12 are provided with notches at one end close to the pump cover. The notches of the connecting covers 12 are closed by adjacent cover segments to form the chambers 16. More specifically, the connecting covers 12 can be sequentially divided into at least one intermediate cover and one end cover along the direction away from the rear cover 11, and the intermediate cover is located between the end cover and the rear cover 11. The water inlets 122 and the water outlets 123 are arranged on each connecting cover 12, and are in communication with the notches of the connecting cover 12. In the embodiment, the pump body 1 is provided with two chambers 16, and the pump body 1 comprises three cover segments, wherein the rear cover 11, the intermediate cover and the end cover are provided with one cover segment respectively.

[0036] With reference to Figure 2 and Figure 4The connecting through holes 121 are formed through the connecting pump covers 12, the threaded holes 111 are formed on the rear cover 11, the bolt rod 15 is arranged on the pump body 1, one end of the bolt rod 15 is fixedly provided with a nut 151, the nut 151 abuts against the connecting pump cover 12 farthest from the pump cover, that is, the end pump cover in the embodiment. The middle part of the bolt rod 15 penetrates through the connecting through holes 121 on all the connecting pump covers 12, the other end of the bolt rod 15 extends into the threaded hole 111 and is screwed with the threaded hole 111. When the bolt rod 15 is removed, any adjacent cover segments can be separated, so that the adjacent cover segments can be sequentially disassembled or assembled, the chamber 16 can be conveniently opened or closed, and the centrifugal pump can be conveniently maintained.

[0037] In order to ensure the coaxiality of the chambers 16, referring to Figure 3 In the adjacent sleeve knots, one cover segment is provided with an annular groove 13 at one end, and the other cover segment is integrally formed with a positioning ring 14 at one end, the positioning ring 14 and the annular groove 13 are matched with each other, and the positioning ring 14 is inserted into the annular groove 13. The positioning ring 14 is inserted into the annular groove 13 and is positioned by the cooperation of the positioning ring 14 and the annular groove 13, so as to ensure the coaxiality of all the chambers 16. A sealing ring 131 is arranged between the adjacent sleeve knots, the sealing ring 131 is arranged in the annular groove 13, one side of the sealing ring 131 abuts against the annular groove 13, and the other side of the sealing ring 131 abuts against the positioning ring 14, so that the sealing ring 131 enhances the sealing performance of the chamber 16.

[0038] In order to optimize the liquid introduction and flow effect of the impeller 4, referring to Figures 3 to 5 The impeller 4 comprises an upper blade cover 41, a lower blade cover 42, a shaft cylinder 43 and blades 44. The shaft cylinder 43 is fixedly arranged on the rotating shaft 2, the middle part of the lower blade cover 42 is fixedly connected with the shaft cylinder 43, the blades 44 are arranged on the end surface of the lower blade cover 42, all the blades 44 are uniformly distributed in the circumferential direction of the shaft cylinder 43, the upper blade cover 41 is fixedly arranged on the side of all the blades 44 away from the lower blade cover 42, and the middle part of the upper blade cover 41 is spaced apart from the shaft cylinder 43 to form a water inlet cavity 45 for the liquid to enter between the upper blade cover 41 and the lower blade cover 42. The water inlet 122 is formed with an expanding portion 124 at one end facing the chamber 16, the middle part of the upper blade cover 41 is provided with a protrusion 411, and the protrusion 411 extends into the expanding portion 124.

[0039] Referring to Figure 3 and Figure 5 When the liquid enters the chamber 16 from the water inlet 122, part of the liquid enters the water inlet cavity 45 and enters between the upper blade cover 41 and the lower blade cover 42. With the high-speed rotation of the impeller 4, the liquid between the upper blade cover 41 and the lower blade cover 42 flows away from the center of the impeller 4, and thus flows into the water outlet 123. At the same time, the upper blade cover 41 and the lower blade cover 42 are located on both sides of the blades 44, which effectively constrain the liquid, so that the liquid can reduce the axial impact on the whole impeller 4 when being guided to flow by the blades 44.

[0040] The implementation principle of the multi-input and multi-output impeller centrifugal pump according to an embodiment of the application is as follows: when multiple different liquids need to be pumped, different water inlets 122 on the pump body 1 are connected to different liquid sources, the motor 3 drives the rotating shaft 2 to rotate, and drives all the impellers 4 to rotate at high speed to generate centrifugal force. Each liquid enters the corresponding chamber 16 along the water inlet 122. Then, part of the liquid enters the water inlet chamber 45 and enters between the upper leaf cover 41 and the lower leaf cover 42. With the high-speed rotation of the impeller 4, the liquid between the upper leaf cover 41 and the lower leaf cover 42 flows away from the center of the impeller 4 under the action of the blade 44, so that the liquid flows out of the water outlet 123. Different liquids flow out of the corresponding water outlets 123 of the chambers 16, realizing the simultaneous pumping and conveying of multiple liquids by one centrifugal pump.

[0041] The above are preferred embodiments of the application, and do not limit the protection scope of the application. Therefore, equivalent changes made on the basis of the structure, shape, and principle of the application should be covered within the protection scope of the application.

Claims

1. A multi-inlet, multi-outlet impeller centrifugal pump, comprising a pump body (1), wherein a rotating shaft (2) is rotatably disposed within the pump body (1), and a motor (3) is fixedly disposed within the pump body (1), wherein the motor (3) is used to drive the rotating shaft (2) to rotate, characterized in that: The pump body (1) is internally spaced along the axis direction of the rotating shaft (2) with several cavities (16) which are cylindrically opened; the cavities (16) are provided with impellers (4), the rotating shaft (2) extends into all cavities (16), and all the impellers (4) are fixedly installed on the rotating shaft (2); the pump body (1) is provided with several water inlets (122) and water outlets (123) which communicate between the outside of the pump body (1) and the inside of the cavities (16), the water inlets (122), water outlets (123) and cavities (16) are one-to-one corresponding, the water inlets (122) extend to the middle of the end wall of the cavity (16) near one end of the cavity (16), and the water outlets (123) extend to the side wall of the cavity (16) near one end of the cavity (16).

2. A multiple-inlet and multiple-outlet centrifugal pump of mixed flow type according to claim 1, characterized in that: The pump body (1) comprises several cover sections which are sequentially arranged along the axis direction of the rotating shaft (2), and the adjacent cover sections are detachably connected and fixed, and the cavities (16) are formed by the adjacent cover sections.

3. A multiple-inlet multiple-outlet centrifugal pump according to claim 2, characterized in that: The cover sections are sequentially divided into a rear cover (11) and several connecting pump covers (12) along the axis of the rotating shaft (2), the motor (3) is embedded in the rear cover (11), the connecting pump cover (12) is provided with a recess near one end of the pump cover, and the recess of the connecting pump cover (12) is closed by the end wall of the adjacent cover section to form the cavity (16).

4. A multiple-inlet multiple-outlet centrifugal pump according to claim 3, characterized in that: The connecting pump cover (12) is provided with a connecting through hole (121), the rear cover (11) is provided with a threaded hole (111), the pump body (1) is provided with a bolt rod (15), one end of the bolt rod (15) is fixedly provided with a nut (151), the nut (151) abuts against the connecting pump cover (12) farthest from the pump cover, the middle part of the bolt rod (15) penetrates through the connecting through holes (121) of all the connecting pump covers (12), and the other end of the bolt rod (15) extends into the threaded hole (111) and threadedly cooperates with the threaded hole (111).

5. A multiple-inlet multiple-outlet centrifugal pump according to claim 2, characterized in that: In the adjacent sleeve joints, one of the cover sections is provided with an annular groove (13) at the end, and the other cover section is integrally formed with a positioning ring (14) at the end, the positioning ring (14) and the annular groove (13) are mutually adapted, and the positioning ring (14) is inserted into the annular groove (13).

6. A multiple-inlet multiple-outlet centrifugal pump according to claim 5, characterized in that: A sealing ring (131) is arranged between the adjacent sleeve joints, the sealing ring (131) is installed in the annular groove (13), one side of the sealing ring (131) abuts against the annular groove (13), and the other side of the sealing ring (131) abuts against the positioning ring (14).

7. A multiple-inlet multiple-outlet centrifugal pump according to claim 1, characterized in that: The impeller (4) comprises an upper cover (41), a lower cover (42), a shaft cylinder (43), and blades (44), the shaft cylinder (43) is fixedly installed on the rotating shaft (2), the lower cover (42) is fixedly connected with the shaft cylinder (43) at the middle part, the blades (44) are fixedly arranged on the end face of the lower cover (42), all the blades (44) are uniformly distributed in the circumferential direction of the shaft cylinder (43), the upper cover (41) is fixedly arranged on the side, away from the lower cover (42), of all the blades (44), and the middle part of the upper cover (41) and the shaft cylinder (43) are left with a water inlet cavity (45) for liquid to enter between the upper cover (41) and the lower cover (42).

8. A multiple-inlet multiple-outlet centrifugal pump according to claim 7, characterized in that: The water inlet (122) is provided with a flared portion (124) at one end of the chamber (16), the middle part of the upper cover (41) is provided with a protrusion (411), and the protrusion (411) extends into the flared portion (124).

Images