A mixed flow pump for delivering high gas rates
By designing a hybrid impeller and volute structure for the mixed-transport pump, the problem of air blockage in the transportation of high-flow-rate, high-head, and high-gas-content mixtures was solved, achieving efficient transportation of solid particles and extending pump life.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SICHUAN ZIGONG IND PUMP
- Filing Date
- 2025-08-07
- Publication Date
- 2026-07-14
Smart Images
Figure CN224496770U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of pump structure technology, and in particular to a mixed pump for conveying high gas content. Background Technology
[0002] In industrial environments where high-gas-content mixtures are transported, positive displacement pumps, such as screw pumps and diaphragm pumps, are currently the main types used. However, their flow rates are relatively low and cannot meet the high-flow-rate demands of special industrial environments. While screw pumps can transport high-gas-content mixtures, they are less effective at transporting media containing solid particles, primarily due to rapid screw wear and short replacement cycles. Diaphragm pumps, although capable of transporting media containing solid particles, are less efficient than screw pumps for transporting large-flow, high-gas-content mixtures. For transporting high-gas-content liquid mixtures, screw pumps and axial-flow mixed-transfer pumps can be used. For transporting large-flow, low-head mixtures, axial-flow mixed-transfer pumps can be used. For transporting large-flow, high-head mixtures containing solid particles and with high gas content, a mixed-transfer pump capable of handling large flow rates, high heads, solid particles, and high gas content (≤50%) is needed. Summary of the Invention
[0003] The purpose of this application is to provide a mixed pump for conveying high gas content, so as to solve or alleviate the problems existing in the prior art.
[0004] To achieve the above objectives, this application provides the following technical solution:
[0005] This application provides a mixed-flow pump for conveying high gas content, comprising a pump body, wherein the pump body includes, in sequence along the axial direction, a feed section, a discharge section, and a drive section, wherein the feed section is provided with a pump inlet, and a pump outlet is provided on the side wall of the pump body corresponding to the position of the discharge section, wherein a pump shaft is rotatably disposed within the pump body, one end of the pump shaft extends out of the drive section and is connected to a drive mechanism, and the other end of the pump shaft passes through the discharge section and extends to the feed section, wherein a mixing impeller is disposed on the pump shaft and disposed in the discharge section; the mixing impeller includes an axial flow impeller, a mixed flow impeller, and a centrifugal impeller arranged in sequence along the axial direction of the pump shaft, wherein the axial flow impeller is disposed on the side near the pump inlet.
[0006] Optionally, the axial flow impeller is a helical impeller, and the helical impeller is provided with at least two helical blades.
[0007] Optionally, the drive unit includes a bearing housing, which is integrally formed and connected to the discharge unit. The bearing housing contains a plurality of bearings, and the pump shaft passes horizontally through the bearings and is connected to the bearings.
[0008] Optionally, the pump shaft is provided with an inlet guide vane at its end, and the inlet guide vane is disposed inside the pump inlet.
[0009] Optionally, the inlet guide vane is provided with multiple twisted arc-shaped blades.
[0010] Optionally, the two ends of the drive unit are respectively provided with a front cover plate and a rear cover plate, the front cover plate is provided with a wear-resistant plate, and the pump shaft passes through the wear-resistant plate and the rear cover plate.
[0011] Optionally, a volute is provided at the discharge section corresponding to the position of the mixing impeller. The volute is connected to the pump outlet. The longitudinal section of the volute has a convex shape. The mixing impeller is disposed inside the volute. The cross-sectional area of the volute gradually increases from the axial impeller to the centrifugal impeller.
[0012] Optionally, a mechanical seal is provided at the connection position between the drive unit and the discharge unit, and the pump shaft passes through the mechanical seal.
[0013] Beneficial effects:
[0014] In the mixed-flow pump for conveying high gas content provided in this application embodiment, after the mixture enters the pump body through the pump inlet, the mixture already has high pressure energy before entering the mixing impeller, which reduces the possibility of air blockage in the impeller inlet section. Under the action of the mixing impeller, the axial flow impeller, due to its large flow channel width and spiral structure, allows high gas content and high solid content particles to pass through the impeller smoothly and be pressurized. The mixture is pressurized again at the front end of the impeller, and after entering the middle of the impeller, it is further pressurized under the action of the mixed-flow impeller without air blockage. Finally, under the action of the centrifugal impeller at the tail end, the pressure energy of the mixture is increased again. After passing through the mixing impeller, the mixture enters the pump body volute, where the volute collects the pressure energy and discharges it through the pump body outlet. This method can convey large flow rates, high heads, solid particles, and high gas content materials while preventing air blockage. Attached Figure Description
[0015] The accompanying drawings, which form part of this application, are used to provide a further understanding of this application. The illustrative embodiments and descriptions of this application are used to explain this application and do not constitute an undue limitation of this application. Wherein:
[0016] Figure 1 This is a structural cross-sectional view of a mixed-transfer pump for conveying high gas content, provided according to some embodiments of this application.
[0017] Explanation of reference numerals in the attached figures:
[0018] 1. Pump body; 101. Feed section; 1011. Pump inlet; 102. Discharge section; 1021. Pump outlet; 1022. Volute; 103. Drive unit; 1031. Bearing housing; 1032. Bearing; 1033. Front cover plate; 1034. Rear cover plate; 2. Pump shaft; 3. Mixing impeller; 301. Axial flow impeller; 302. Mixed flow impeller; 303. Centrifugal impeller; 4. Inlet guide vane; 401. Arc-shaped blade; 5. Wear-resistant plate; 6. Mechanical seal. Detailed Implementation
[0019] The present application will now be described in detail with reference to the accompanying drawings and embodiments. Various examples are provided by way of explanation and not by way of limitation. In fact, those skilled in the art will understand that modifications and variations can be made to the present application without departing from the scope or spirit of the present application. For example, a feature shown or described as part of one embodiment may be used in another embodiment to produce yet another embodiment. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention should fall within the scope of protection of the embodiments of the present invention.
[0020] Example 1:
[0021] like Figure 1 As shown, a mixed-transport pump for conveying high gas content includes a pump body 1. The pump body 1 includes, along the axial direction, a feed section 101, a discharge section 102, and a drive section 103. The feed section 101 is provided with a pump inlet 1011, the inner diameter of which gradually increases from the outside to the inside to ensure that the pump does not experience cavitation under high gas content and can operate stably. A pump outlet 1021 is provided on the side wall of the pump body 1 at the position corresponding to the discharge section 102. The pump outlet 1021 is a bell-shaped opening. A pump shaft 2 is rotatably mounted inside the pump body 1. One end of the pump shaft 2 passes through the drive section 103 and is connected to a drive mechanism (not shown in the figure). The drive mechanism here is a drive motor. The other end of the pump shaft 2 passes through the discharge section 102 and extends to the feed section 101. A mixing impeller 3 is provided on the pump shaft 2 and is located in the discharge section 102. The mixing impeller 3 includes axial flow impellers arranged sequentially along the axial direction of the pump shaft 2. 01. Mixed-flow impeller 302 and centrifugal impeller 303. Axial-flow impeller 301 is located on the side near the pump inlet 1011. The outer diameter of centrifugal impeller 303 is larger than that of mixed-flow impeller 302. The blade shape of mixed-flow impeller 302 is between that of centrifugal impeller 303 and axial-flow impeller 301. It has both the curved blade shape of centrifugal impeller 303 and the disc structure of axial-flow impeller 301. Mixed-flow impeller 302 plays the role of intermediate buffer and receiving, changing the material from axial-flow transmission to centrifugal transmission.
[0022] The working process and principle of the above structure are as follows:
[0023] After the mixture enters the pump body 1 through the pump inlet 1011, it already has high pressure energy before entering the mixing impeller 3, which reduces the possibility of air blockage at the impeller inlet. Under the action of the mixing impeller 3, the axial flow impeller 301, due to its large flow channel width and spiral structure, allows high gas content and high solid content particles to pass through the impeller smoothly and be pressurized. The mixture is pressurized again at the front end of the impeller. After entering the middle of the impeller, it is further pressurized under the action of the mixed flow impeller 302 without air blockage. Finally, under the action of the centrifugal impeller 303 at the tail end, the pressure energy of the mixture is increased again. After passing through the mixing impeller 3, the mixture enters the volute 1022 of the pump body 1. The volute 1022 collects the pressure energy and discharges it through the outlet of the pump body 1. This method can transport large flow rates, high heads, solid particles, and materials with high gas content while preventing air blockage.
[0024] In another embodiment of this utility model, based on embodiment 1, as follows: Figure 1 As shown, the axial flow impeller 301 is a helical impeller, and the helical impeller is provided with at least two helical blades.
[0025] The multi-bladed spiral design allows mixtures with high gas content and high solid particle content to pass through.
[0026] In another embodiment of this utility model, based on embodiment 1, as follows: Figure 1 As shown, the drive unit 103 includes a bearing housing 1031, which is integrally formed and connected to the discharge unit 102. Several bearings 1032 are provided inside the bearing housing 1031, and the pump shaft 2 passes horizontally through the bearings 1032 and is connected to the bearings 1032.
[0027] The bearing housing 1031 reduces the frictional resistance of the pump shaft 2 during rotation. The rotation is smoother and more fluid due to the rotational connection between the pump shaft 2 and the bearing 1032.
[0028] In another embodiment of this utility model, based on embodiment 1, as follows: Figure 1 As shown, the pump shaft 2 is provided with an inlet guide vane 4 at its end, and the inlet guide vane 4 is located inside the pump inlet 1011.
[0029] The inlet guide vane 4 has a guiding function, which helps the material to flow into the pump body 1 evenly and smoothly.
[0030] In another embodiment of this utility model, based on embodiment 1, as follows: Figure 1 As shown, the inlet guide vane 4 is provided with multiple twisted arc-shaped blades 401.
[0031] The curved blade 401 is designed to fully mix the liquid and also serves as a guide.
[0032] In another embodiment of this utility model, based on embodiment 1, as follows: Figure 1 As shown, the two ends of the drive unit 103 are respectively provided with a front cover plate 1033 and a rear cover plate 1034. A wear-resistant plate 5 is provided on the front cover plate 1033, and the pump shaft 2 passes through the wear-resistant plate 5 and the rear cover plate 1034.
[0033] The front cover plate 1033 and the rear cover plate 1034 are designed to protect the drive unit 103 and facilitate subsequent maintenance. The wear-resistant plate 5 can be adjusted according to wear and gap size, extending the service life of the pump body 1 to twice that of a conventional pump.
[0034] In another embodiment of this utility model, based on embodiment 1, as follows: Figure 1 As shown, a volute 1022 is provided in the discharge section 102 corresponding to the position of the mixing impeller 3. The volute 1022 is connected to the pump outlet 1021. The longitudinal section of the volute 1022 has a convex shape. The mixing impeller 3 is installed inside the volute 1022. The cross-sectional area of the volute 1022 gradually increases from the axial impeller 301 to the centrifugal impeller 303.
[0035] This configuration ensures that the gas-liquid mixture can quickly pass through the volute 1022 for energy collection and discharge, avoiding gas blockage within the volute 1022.
[0036] In another embodiment of this utility model, based on embodiment 1, as follows: Figure 1 As shown, a mechanical seal 6 is provided at the connection position between the drive unit 103 and the discharge unit 102, and the pump shaft 2 passes through the mechanical seal 6.
[0037] The mechanical seal 6 prevents liquid from the discharge section 102 from seeping into the drive section 103.
[0038] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.
[0039] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.
[0040] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection 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.
[0041] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.
[0042] In this invention, the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.
[0043] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.
Claims
1. A mixed-transfer pump for conveying high gas content, characterized in that, The pump includes a pump body, which sequentially comprises a feed section, a discharge section, and a drive section along the axial direction. The feed section is provided with a pump inlet, and the pump body has a pump outlet on its side wall corresponding to the position of the discharge section. A pump shaft is rotatably mounted inside the pump body. One end of the pump shaft extends out of the drive section and is connected to a drive mechanism, while the other end of the pump shaft passes through the discharge section and extends to the feed section. A mixing impeller is mounted on the pump shaft and is located in the discharge section. The mixing impeller includes an axial flow impeller, a mixed flow impeller, and a centrifugal impeller sequentially arranged along the axial direction of the pump shaft. The axial flow impeller is located on the side near the pump inlet.
2. The mixed-transfer pump for conveying high gas content according to claim 1, characterized in that, The axial flow impeller is a helical impeller, and the helical impeller is provided with at least two helical blades.
3. The mixed-transfer pump for conveying high gas content according to claim 1, characterized in that, The drive unit includes a bearing housing, which is integrally formed and connected to the discharge unit. Several bearings are provided inside the bearing housing, and the pump shaft passes horizontally through the bearings and is connected to the bearings.
4. The mixed-transfer pump for conveying high gas content according to claim 1, characterized in that, The pump shaft is provided with an inlet guide vane at its end, and the inlet guide vane is located inside the pump inlet.
5. The mixed-transfer pump for conveying high gas content according to claim 4, characterized in that, The inlet guide vane is equipped with multiple twisted arc-shaped blades.
6. The mixed-transfer pump for conveying high gas content according to claim 1, characterized in that, The drive unit is provided with a front cover plate and a rear cover plate at both ends, and a wear-resistant plate is provided on the front cover plate. The pump shaft passes through the wear-resistant plate and the rear cover plate.
7. The mixed-transfer pump for conveying high gas content according to claim 1, characterized in that, The discharge section is provided with a volute corresponding to the position of the mixing impeller. The volute is connected to the pump outlet. The longitudinal section of the volute has a convex shape. The mixing impeller is installed inside the volute. The cross-sectional area of the volute gradually increases from the axial impeller to the centrifugal impeller.
8. The mixed-transfer pump for conveying high gas content according to claim 1, characterized in that, A mechanical seal is provided at the connection between the drive unit and the discharge unit, and the pump shaft passes through the mechanical seal.