Conveying pump

Abstract

The invention relates to the technical field of delivery pumps, and discloses a delivery pump which comprises a shell device and an impeller device, the shell device comprises an outer shell assembly, a plurality of lining assemblies, a front protection plate assembly and a rear protection plate assembly, a cavity is formed in the outer shell assembly, and the lining assemblies are arranged in the cavity and spliced to form an inner container; the front protection plate assembly and the rear protection plate assembly are arranged at the two ends of the inner container and spliced with the inner container, and a suction channel communicated with the inner container is formed in the front protection plate assembly. The impeller device is arranged in the inner container and comprises a central hub structure and a plurality of blade structures, and the central hub structure is provided with a suction inlet and a fixed cavity communicated with the suction inlet; the multiple blade structures are spliced with the center hub structure and are sequentially arranged in the circumferential direction of the center hub structure, the blade structures are provided with penetrating flow channels, and the flow channels communicate with the fixing cavity. The large ceramic inner container and the impeller which are difficult to integrally sinter are decomposed into a plurality of small standard parts, so that the requirement on the size of manufacturing equipment and the manufacturing difficulty are greatly reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of delivery pumps, in particular to a delivery pump. BACKGROUND

[0002] The delivery pump comprises a shell and an impeller arranged in the shell, the impeller rotates to suck slurry and pump the slurry out of the shell.

[0003] In order to improve the wear resistance of the delivery pump and prolong the service life, a ceramic lining is arranged in the shell, and the impeller is a ceramic impeller. The ceramic has high wear resistance, which can greatly improve the wear resistance of the delivery pump.

[0004] However, the ceramic lining and the ceramic impeller are generally formed by 3D printing, casting and other processes, and then sintered at high temperature. When the size of the delivery pump is larger, the size of the casting gypsum mold and the sintering furnace required is larger. Large ceramic parts are prone to thermal stress during sintering, which can cause cracks in the ceramic parts. The qualified rate of manufacturing large-size delivery pumps is low, and the product quality is affected. SUMMARY

[0005] The present application aims to overcome the above technical deficiencies and provide a delivery pump to solve the technical problem that large-size delivery pumps cannot be made in the prior art.

[0006] To achieve the above technical purpose, the present application adopts the following technical scheme: The present application provides a delivery pump, comprising: a shell device comprising a shell assembly, a plurality of lining assemblies, a front guard plate assembly and a rear guard plate assembly, the shell assembly has a cavity formed therein, the plurality of lining assemblies are arranged in the cavity and are spliced to form an inner container, the front guard plate assembly and the rear guard plate assembly are arranged at both ends of the inner container and are spliced with the inner container, and the front guard plate assembly forms a suction passage in communication with the inner container; and an impeller device arranged in the inner container, the impeller device comprises a hub structure and a plurality of blade structures, the hub structure is provided with a suction inlet and a fixed cavity in communication with the suction inlet; the plurality of blade structures are spliced with the hub structure and are arranged in sequence along the circumference of the hub structure, the blade structure is provided with a through flow channel, and the flow channel is in communication with the fixed cavity.

[0007] In one embodiment, the shell assembly comprises a volute, a front end plate and a rear end plate, the volute has a cavity, and both ends are provided with an installation channel adjacent to the cavity, and the front end plate and the rear end plate are arranged in the two installation channels and are detachably connected with the volute. The inner liner assembly is sized to be smaller than the inner diameter of the mounting passage, so that the inner liner assembly can enter the cavity through the mounting passage.

[0008] In one of the embodiments, the front shield assembly comprises a panel member and a plurality of tube members, the panel member is spliced with the inner container and connected with the shell assembly, the panel member is provided with a through hole, the plurality of tube members are coaxially arranged and spliced in sequence, the tube member at one end is spliced with the panel member and communicates with the through hole, and the inner diameters of the plurality of tube members gradually increase in the direction away from the through hole.

[0009] In one of the embodiments, the plurality of blade structures are sequentially clamped away from the side of the hub structure along the circumference of the hub structure.

[0010] In one of the embodiments, the impeller device further comprises a reinforcing assembly, the reinforcing assembly is arranged at the edge of the blade structure away from the hub structure, the reinforcing assembly comprises a plurality of reinforcing blocks, the plurality of reinforcing blocks are connected with the outer edge of the blade structure and sequentially abutted along the circumference of the impeller device.

[0011] In one of the embodiments, the impeller device further comprises a cover and a first metal skeleton, the cover is arranged at the end of the impeller device, the first metal skeleton is arranged between the cover and the blade structure and connected with the blade structure and the cover. The reinforcing blocks are clamped with the first metal skeleton.

[0012] In one of the embodiments, the outer edge of the first metal skeleton is formed with a first clamping structure, the first clamping structure is arranged along the circumference of the impeller device; the outer edges of the blade structure and the cover are both provided with notches. The reinforcing blocks are formed with a second clamping structure, the reinforcing blocks are clamped with the first clamping structure through the second clamping structure, and the reinforcing blocks can slide relative to the first clamping structure along the circumference of the impeller device, the reinforcing blocks are arranged at the notches, and the two reinforcing blocks at both ends of the plurality of reinforcing blocks respectively abut the two opposite inner walls of the notches.

[0013] In one of the embodiments, the cover is provided with a countersunk hole relative to the first metal skeleton. The impeller device further comprises a connecting piece, the connecting piece comprises a connecting bolt, a blocking block and a first adhesive layer, the threaded end of the connecting bolt passes through the counterbore and is threadedly connected with the first metal framework, the blocking block is arranged in the counterbore, the outer diameter of the blocking block gradually decreases in the direction away from the counterbore, and the first adhesive layer is embedded in the counterbore and connected with the inner wall of the counterbore and fitted on the blocking block.

[0014] In one of the embodiments, the first metal framework is provided with a first fixing hole, and the inner wall of the flow channel of the blade structure is provided with a second fixing hole relative to the first fixing hole. The impeller device further comprises a wear-resistant part, which is inserted into the first fixing hole and the second fixing hole.

[0015] In one of the embodiments, one of the cover and the first metal framework is provided with a protrusion, and the other is provided with a groove, wherein the protrusion is embedded in the groove to form a concave-convex fitting.

[0016] Compared with the prior art, the delivery pump provided by the application comprises a shell device and an impeller device, and the ceramic part in the delivery pump limits the size of the delivery pump. In order to facilitate the size of the delivery pump, the wear-resistant inner liner is spliced by a split type inner liner assembly to replace the traditional whole ceramic inner liner, and the impeller device is also designed in a split type, that is, the center hub and the plurality of blades are separately manufactured and spliced to replace the whole ceramic impeller. When working, the impeller device is driven to rotate, the slurry enters from the suction channel of the front end plate assembly, is distributed to the flow channels of the blades through the suction inlet and the fixed cavity of the center hub, and is thrown out under the action of centrifugal force and is pressed out through the inner liner and the outer shell assembly.

[0017] By splitting the large ceramic inner liner and the impeller, which are difficult to be sintered as a whole, into a plurality of small standard parts, the requirement for the size of the manufacturing equipment and the manufacturing difficulty are greatly reduced, so that it is possible to manufacture an extra-large and high-wear-resistant delivery pump. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 is a structural schematic view of the delivery pump provided by an embodiment of the application; Figure 2 is a sectional view of the delivery pump provided by an embodiment of the application; Figure 3 is Figure 2 is a partial structural schematic view of the front end plate and the front end plate assembly; Figure 4 is a partial sectional view of the impeller device in the delivery pump provided by an embodiment of the application; Figure 5 is Figure 4A local enlarged view of the middle A; Figure 6 A local cross-sectional view of a vane in a delivery pump according to an embodiment of the present application; Figure 7 A cross-sectional view of a housing assembly in a delivery pump according to an embodiment of the present application; Figure 8 A local enlarged view of the middle B; Figure 7 A local enlarged view of the middle C; Figure 9 Figure 7 A local enlarged view of the middle D; Figure 10 A cross-sectional view of a housing assembly in a delivery pump according to an embodiment of the present application; Figure 11 A cross-sectional view of a housing assembly in a delivery pump according to an embodiment of the present application; Figure 12 A local cross-sectional view of a vane in a delivery pump according to an embodiment of the present application; Figure 13 A local enlarged view of the middle E; Figure 12 A local enlarged view of the middle F; Figure 14 Figure 12 A local enlarged view of the middle F; Figure 15 A local cross-sectional view of a vane in a delivery pump according to an embodiment of the present application; Figure 16 A local cross-sectional view of a vane in a delivery pump according to an embodiment of the present application; Figure 17 A local cross-sectional view of a vane in a delivery pump according to an embodiment of the present application; Figure 18 A local cross-sectional view of a vane in a delivery pump according to an embodiment of the present application; Figure 19 A local enlarged view of the middle F; Figure 18 A local enlarged view of the middle F;

[0019] Legend of reference signs:​​Housing device 1; housing assembly 11; volute 111; first fixing hole 111a; second fixing hole 111b; filling port 111c; diffusion pipe 112; through hole 112a; rear end plate 113; front end plate 114; cavity 11a; mounting channel 11b; sealing plug 115; inner liner assembly 12; first inner liner 121; second inner liner 122; reinforcing rib 123; first protrusion 12a; first recess 12b; first inner liner located in the first position is marked as 1211; the second last first inner liner is marked as 1212; the last first inner liner is marked as 1213; front guard plate assembly 13; panel piece 131; pipe body 132; rear guard plate assembly 14; first adhesive layer 15; Impeller device 2; fixed channel 2a; notch 2b; center hub structure 21; suction port 21a; fixed cavity 21b; communication port 21c; hub 211; fan blade 212; blade structure 22; flow passage 22a; second protrusion 22b; second recess 22c; third recess 22d; third protrusion 22e; second matching structure 22f; annular protrusion 22g; fourth fixing hole 22h; reinforcing assembly 23; reinforcing block 231; second clamping structure 231a; cover body 24; cover plate 241; flow guide channel 241b; countersunk hole 24a; fifth protrusion 24b; first metal framework 25; first clamping structure 25a; third fixing hole 25b; fifth recess 25c; second metal framework 26; second adhesive layer 27; connecting piece 28; connecting bolt 281; plugging block 282; third adhesive layer 283; wear-resistant part 29; Transmission mechanism 3. DETAILED DESCRIPTION

[0020] In order to make the purpose, technical scheme and advantages of the present application more clear, the present application is further described in detail below in combination with the drawings and examples. It should be understood that the specific examples described herein are only used to explain the present application and do not limit the present application.

[0021] In order to solve the technical problem that the prior art cannot make large-size delivery pumps, the present application provides a delivery pump, which facilitates the large-size of the delivery pump.

[0022] Please refer to Figures 1 to 19 , Figure 2It is a sectional view of a delivery pump in an embodiment of the present application, the delivery pump comprising a casing device 1 and an impeller device 2, the casing device 1 comprising a shell assembly 11, a plurality of liner assemblies 12, a front shield assembly 13 and a rear shield assembly 14, the shell assembly 11 being formed with a cavity 11a inside, the plurality of liner assemblies 12 being built-in in the cavity 11a and spliced to form an inner container, the front shield assembly 13 and the rear shield assembly 14 being arranged at both ends of the inner container and spliced with the inner container, the front shield assembly 13 being formed with a suction passage 13a communicating with the inner container; the impeller device 2 being built-in in the inner container, the impeller device 2 comprising a hub structure 21 and a plurality of blade structures 22, the hub structure 21 being provided with a suction port 21a and a fixed cavity 21b communicating with the suction port 21a; the plurality of blade structures 22 being spliced with the hub structure 21 and arranged in sequence along the circumference of the hub structure 21, the blade structure 22 being provided with a through flow channel 22a, the flow channel 22a communicating with the fixed cavity 21b.

[0023] Specifically, the delivery pump comprises the casing device 1 and the impeller device 2, and the ceramic parts in the delivery pump limit the size of the delivery pump from being large, in order to facilitate the size of the delivery pump from being large, therefore, the wear-resistant inner container is spliced by the split type liner assembly 12, instead of the traditional whole ceramic inner container, and the impeller device 2 is also designed in a split type, the hub structure 21 and the plurality of blade structures 22 are separately manufactured and spliced, instead of the whole ceramic impeller formed integrally. When working, the impeller device 2 is driven to rotate, the slurry enters from the suction passage of the front shield assembly 13, is distributed to the flow channel of each blade through the suction port 21a and the fixed cavity 21b of the hub structure 21, and is thrown out under the action of centrifugal force and is pressed out by the inner container and the shell assembly 11.

[0024] By dividing the large, difficult-to-integrally-form sintered ceramic inner container and the impeller into a plurality of small standard parts, the requirements for the size of the manufacturing equipment and the manufacturing difficulty are greatly reduced, so that it is possible to manufacture an extra-large, high-wear-resistant delivery pump.

[0025] The traditional shell is generally spliced by two split shells, however, in order to achieve the same structural strength, the spliced shell needs to be thicker, so as to meet the requirement of structural strength, but the thicker the shell is, the more difficult it is to process and large-scale, therefore, as shown in Figure 2As shown in one of the embodiments, the shell assembly 11 includes a volute 111, a front end plate 114 and a rear end plate 113, the volute 111 has a cavity 11a, and both ends are provided with mounting channels 11b adjacent to the cavity 11a, and the front end plate 114 and the rear end plate 113 are arranged in the two mounting channels 11b and are detachably connected with the volute 111; the inner liner assembly 12 is sized smaller than the inner diameter of the mounting channel 11b, so that the inner liner assembly 12 can enter the cavity 11a through the mounting channel 11b. Among them, the material of the volute 111, the front end plate 114 and the rear end plate 113 can be cast iron or other materials.

[0026] Specifically, when assembling the shell device 1, the plurality of inner liner assemblies 12 are sent into the cavity 11a through the mounting channel 11b, and then assembled in the cavity 11a to form an inner container. The inner liner assembly 12 can protect the inner wall of the cavity 11a, and since the inner liner assembly 12 enters the cavity 11a through the mounting channel 11b, it is not necessary to set the shell assembly 11 as a half-split structure. In the case of reaching the preset structural strength, the thickness of the whole shell assembly 11 is thinner, and it is not necessary to thicken the thickness of the shell assembly 11, thereby reducing the weight of the shell device and facilitating the large-scale of the shell device.

[0027] It should be understood that the cavity 11a can be circular, involute, etc. Specifically, as shown in Figure 7 and Figure 11 In one of the embodiments, the cavity 11a is spiral, the shape of the inner container matches the shape of the cavity 11a, and the inner container is circumferentially positioned through the cavity 11a.

[0028] In this embodiment, by setting the cavity 11a as spiral, when the shape of the inner container matches the shape of the cavity 11a, the inner wall of the spiral cavity 11a can position the circumferential direction of the inner container, and since the inner container cooperates with the inner wall of the cavity 11a, the arc surface of the inner container can position the axial direction of the inner container.

[0029] It should be understood that the adjacent inner liner assemblies 12 can be connected and fixed by bolts, bolts and adhesives. Specifically, as shown in Figure 7 and Figure 8 In one of the embodiments, the adjacent inner liner assemblies 12 form a fitting structure of concave-convex fitting.

[0030] In this embodiment, the adjacent inner liner assemblies 12 are fitted through the concave-convex structure, which can fix and position the positions between the adjacent inner liner assemblies 12. At the same time, during the fitting process of the concave-convex structure, a labyrinth structure can be formed to block the fluid from passing between the adjacent inner liner assemblies 12, which can effectively block the fluid from passing through the joint between the adjacent inner liner assemblies 12.

[0031] The end of the inner lining component 12 where it is spliced ​​is provided with a first protrusion 12a and a first groove 12b. The first protrusion 12a and the first groove 12b are fitted into each other with the first protrusion 12a and the first groove 12b of the adjacent inner lining component 12.

[0032] It should be understood that the housing assembly 11 can be the housing of various types of pump bodies, such as Figure 7 , Figure 10 and Figure 11 As shown, specifically, in one embodiment, the outer casing assembly 11 includes a volute 111 and a diffuser tube 112. The volute 111 is hollow inside, and a first fixing hole 111a and a second fixing hole 111b are respectively provided at its end and on its peripheral wall. The diffuser tube 112 is connected to the volute 111 and is arranged along the tangential direction of the volute 111. The diffuser tube 112 has a through hole 112a that communicates with the second fixing hole 111b. The through hole 112a and the first fixing hole 111a form an installation channel 11b.

[0033] In this embodiment, the outer shell assembly 11 includes a volute 111 and a diffuser 112. The volute 111 and the diffuser 112 are combined to form a vortex-shaped cavity 11a. The inner liner assembly 12 can be entirely inserted into the volute 111 and the diffuser 112 through the first fixing hole 111a of the volute 111, or it can be partially inserted into the volute 111 through the first fixing hole 111a and the other part inserted into the diffuser 112 through the through hole 112a for installation, so that the inner liner assembly 12 can be inserted into the integral outer shell assembly 11.

[0034] It should be understood that the volute 111 and diffuser 112 can be processed separately and then assembled. Specifically, in one embodiment, the volute 111 and diffuser 112 are integrally formed cast parts or 3D printed parts. Integrating the volute 111 and diffuser 112 through casting or 3D printing eliminates the need for subsequent processing. Moreover, the structure of the cast part or 3D printed part is lighter in thickness and weight compared to the assembled part while achieving the same structural strength.

[0035] like Figure 7 and Figure 10 As shown, in one embodiment, the plurality of inner lining components 12 are respectively a first inner lining 121 and a second inner lining 122. There are multiple first inner lining components 121. The size of the plurality of first inner lining components 121 is set to be smaller than the size of the first fixing hole 111a, and can enter the volute 111 through the first fixing hole 111a. The size of the second inner lining component 122 is set to be smaller than the size of the second fixing hole 111b, and can enter the diffuser 112 through the second fixing hole 111b.

[0036] In the embodiment, the inner liner assembly 12 is divided into a first inner liner 121 and a second inner liner 122. The first inner liner 121 is arranged in the volute 111 through the first fixing hole 111a, and forms a vortex structure matched with the inner wall of the volute 111. The second inner liner 122 is arranged in the diffuser pipe 112 through the through hole 112a of the diffuser pipe 112, and is embedded with the first inner liner 121 in a concave-convex structure. Meanwhile, the second inner liner 122 is combined with the first inner liner 121 to form a structure in communication.

[0037] It should be understood that the number of the first inner liner 121 can be two, three, four, five, six, seven, eight, etc.

[0038] It should be understood that the plurality of first inner liners 121 can be divided into multiple pieces along the circumference of the volute 111 according to the shape of the inner cavity of the volute 111, and then the divided first inner liners 121 are spliced in the volute 111 to form a vortex structure matched with the shape of the inner cavity of the volute 111.

[0039] It should be understood that the plurality of first inner liners 121 can be arranged and connected in various ways. Specifically, as shown in the figure, in one embodiment, the plurality of first inner liners 121 are spliced in sequence along the circumference of the cavity 11a, and the first and last first inner liners 121 are connected. Figure 7

[0040] In the embodiment, the plurality of first inner liners 121 are spliced in sequence along the circumference of the cavity 11a. When one of the first inner liners 121 is positioned in the vortex-shaped cavity 11a, the other first inner liners 121 can also be positioned through the first inner liner 121. The first and last first inner liners 121 are connected in sequence to position the circumference of all the first inner liners 121.

[0041] Since the plurality of first inner liners 121 are spliced in sequence along the circumference of the cavity 11a, the splicing is performed by a concave-convex structure. When the last first inner liner 121 is spliced, the first inner liner 121 needs to be connected with the second last first inner liner 121 and the first first inner liner 121. In order to ensure that the last first inner liner 121 can be embedded in the first first inner liner 121 and the second last first inner liner 121, and also can be connected by a concave-convex structure, as shown in the figure, in one embodiment, a mounting space is formed between the first first inner liner 121 and the second last first inner liner 121 for mounting the last first inner liner 121. The mounting space is in a stepped shape, and at least partially increases in the direction close to the center of the cavity 11a. The last first inner liner 121 can be inserted into the mounting space from the center of the cavity 11a. Figure 5

[0042] As​​Figure 10 As shown, for the convenience of understanding, the first inner lining member located at the first position is marked as 1211, the first inner lining member located at the second last position is marked as 1212, and the first inner lining member located at the last position is marked as 1213. In this embodiment, the installation space between the first inner lining member marked as 1211 located at the first position and the first inner lining member marked as 1212 located at the second last position is in a stepped shape, and at least partially increases in the direction close to the cavity 11a, and the first inner lining member marked as 1213 located at the last position at least partially decreases in the direction close to the inner wall of the cavity 11a, so that the first inner lining member marked as 1213 located at the last position can be inserted into the installation space, and meanwhile, the clamping can be achieved through the stepped structure.

[0043] It should be understood that the maximum length of each first inner lining member 121 is less than the inner diameter of the first fixing hole 111a, so that the first inner lining member 121 can enter the volute 111 through the first fixing hole 111a, and the outer diameter of the second inner lining member 122 is less than the inner diameter of the through hole 112a, so that the second inner lining member 122 can enter the diffuser pipe 112 through the through hole 112a.

[0044] As shown in FIG. 1, FIG. 2 and FIG. 3, the shell device 1 comprises a shell assembly 11 and a liner assembly 12. Figure 11 As shown, the first inner lining member 1211 located at the first position is arranged at the connection between the volute 111 and the diffuser pipe 112, and the shape of the first inner lining member 1211 is adapted to the shape of the connection between the volute 111 and the diffuser pipe 112, and the second inner lining member 122 is in a tubular structure, and the cooperation between the second inner lining member 122 and the first inner lining member 1211 located at the first position is achieved by using a slot and a ring body inserted into the slot.

[0045] As shown in FIG. 1, FIG. 2 and FIG. 3, the shell device 1 comprises a shell assembly 11 and a liner assembly 12. Figure 8 As shown in one of the embodiments, the side of the liner assembly 12 away from the center of the cavity 11a is provided with a reinforcing rib 123.

[0046] In order to strengthen the structural strength of the liner assembly 12, the side of the liner assembly 12 away from the center of the cavity 11a is provided with a reinforcing rib 123, which is used to enhance the structural strength of the first inner lining member 121, and is also used to enhance the overall strength of the combined structure.

[0047] As shown in FIG. 1, FIG. 2 and FIG. 3, the shell device 1 comprises a shell assembly 11 and a liner assembly 12. Figure 7 As shown in FIG. 1, FIG. 2 and FIG. 3, the shell device 1 comprises a shell assembly 11 and a liner assembly 12. Figure 8 As shown in one of the embodiments, the shell device 1 further comprises a first adhesive layer 15, which is arranged between the inner container and the inner wall of the cavity 11a.

[0048] By setting the first adhesive layer 15, the gap between the inner liner assembly 12 and the cavity 11a can be sealed. Meanwhile, the first adhesive layer 15 can be formed by injecting the adhesive into the gap between the inner liner and the cavity 11a. After the adhesive is fixed, the first adhesive layer 15 is formed. The adhesive can also penetrate into the gap between the adjacent inner liner assemblies 12 to seal the gap between the adjacent inner liner assemblies 12. The components of the adhesive can be a mixture of resin adhesive, vertical adhesive, and silicon carbide particles.

[0049] In order to allow the adhesive to enter the volute 111 and the diffusion pipe 112, as shown in Figure 9 one of the embodiments, the top and bottom of the volute 111 are provided with filling ports 111c, which are connected to the interior of the volute 111. The shell assembly 11 further includes sealing plugs 115, which are detachably connected to the filling ports 111c.

[0050] By setting the filling ports 111c, the adhesive can enter the volute 111 and the diffusion pipe 112 through the filling ports 111c, so that the adhesive can fill the gap between the volute 111 and the first inner liner 121 and the gap between the diffusion pipe 112 and the second inner liner 122. By setting the sealing plugs 115, the sealing plugs 115 can seal the filling ports 111c to prevent the unhardened adhesive from flowing out.

[0051] It should be understood that the first inner liner 121 and the second inner liner 122 can be formed by casting, die casting, or the like. Specifically, in one of the embodiments, the first inner liner 121 is a 3D printed structure.

[0052] The first inner liner 121 and the second inner liner 122 are produced by 3D printing, which does not require mold forming, greatly reducing production cost and production cycle, and shortening product manufacturing cycle.

[0053] In order to protect the suction passage, as shown in Figure 2 and Figure 3 one of the embodiments, the front guard plate assembly 13 includes a panel piece 131 and a plurality of pipe bodies 132. The panel piece 131 is spliced with the inner liner and connected to the shell assembly 11. The panel piece 131 is provided with a through hole. The plurality of pipe bodies 132 are coaxially arranged and spliced in sequence. The pipe body 132 at one end is spliced with the panel piece 131 and connected to the through hole. The inner diameters of the plurality of pipe bodies 132 gradually increase in the direction away from the through hole.

[0054] Since the ceramic is generally processed by 3D printing or pouring, and then sintered into shape, the perpendicular panel piece 131 and the plurality of pipe bodies 132 are vertically arranged, and such a structure is not easy to process by pouring. In the embodiment, the pair of suction channel portions is optimized, and the front guard plate assembly 13 is also designed in a split splicing manner and is composed of a panel and a plurality of gradually expanding pipe bodies 132. The plurality of components are processed in a split manner and then spliced, which facilitates the large-scale of the front guard plate assembly 13. The large-scale suction horn is divided into a plurality of pipe bodies 132, which reduces the manufacturing and sintering difficulty of the large-scale conical pipe. The gradually expanding flow channel 22a design can smoothly guide the fluid, reduce the inlet vortex and hydraulic loss, and improve the suction performance and efficiency of the pump.

[0055] In order to strengthen the outer edge of the impeller structure, as shown in Figures 12 to 14 , in one embodiment, the plurality of blade structures 22 are sequentially clamped away from the side of the hub structure 21 along the circumference of the hub structure 21.

[0056] The side of the blade structure 22 away from the hub structure 21 is a weak side. In the embodiment, the side of the plurality of blade structures 22 away from the hub structure 21 is sequentially clamped to form a whole, which can strengthen the stability and structural strength of the side of the blade structure 22 away from the hub structure 21. The plurality of independent blade structures 22 are connected into a continuous rigid annular structure on the radially outer side. It can greatly enhance the structural rigidity of the whole impeller, effectively resist the huge centrifugal force and fluid excitation force generated by high-speed rotation, prevent the blade structure 22 from deflection or deformation, thereby improving the operation stability, reliability and prolonging the service life.

[0057] It should be understood that the side of the plurality of blade structures 22 away from the hub structure 21 can be clamped by clamping blocks and clamping grooves, or can be clamped by two clamping blocks. Specifically, as shown in Figures 12 to 14 , in one embodiment, the side of the blade structure 22 away from the hub structure 21 has a first end and a second end arranged oppositely, the first end has a second protrusion 22b and a second groove 22c, the second protrusion 22b is located on the side of the second groove 22c away from the hub structure 21, the second end has a third groove 22d and a third protrusion 22e, the third protrusion 22e is located on the side of the third groove 22d close to the hub structure 21; wherein the second protrusion 22b is embedded with the second groove 22c of the adjacent blade structure 22, and the second groove 22c is embedded with the third protrusion 22e of the adjacent blade structure 22.

[0058] The two ends of each blade structure 22 are respectively provided with a protrusion and a groove, which can form a self-positioning male-female matching interface. During assembly, the operator only needs to slide the protrusion of one blade structure 22 into the groove of the adjacent blade structure 22, thereby omitting the complex tooling fixture, making the assembly process intuitive, fast and low in fault tolerance. It can automatically ensure that the installation positions of all blade structures 22 are consistent in the circumferential and radial directions, thereby ensuring the consistency of the dynamic balance accuracy and fluid performance of the final impeller.

[0059] Meanwhile, by sequentially arranging a plurality of blade structures 22 along the circumferential direction of the hub structure 21, after installing the first blade structure 22, the second blade structure 22 can limit the first blade structure 22 to the hub structure 21, and layer by layer lapping, so that there is a synergistic effect between the adjacent blade structures 22, which can fix the adjacent impeller structure to the hub structure 21.

[0060] In order to enable the impeller to form a ceramic metal composite structure to strengthen the structural strength of the impeller, in one embodiment as shown in Figure 12 , a fixing channel 2a is formed between the adjacent blade structures 22 and the hub structure 21.

[0061] In this embodiment, the fixing channel 2a is formed between the adjacent blade structures 22, so that the metal skeleton can be inserted into the fixing channel 2a along the axial direction of the hub structure 21. By cooperating the metal skeleton with the fixing channel 2a, a metal ceramic composite structure is formed, which can strengthen the structural strength of the impeller; or the size of the metal skeleton can be set to be smaller than the size of the fixing channel 2a, and then the adhesive is injected into the fixing channel 2a, and the metal skeleton is connected with the ceramic through the adhesive.

[0062] It should be understood that the hub structure 21 can be cylindrical or have other shapes, and specifically, as shown in Figure 12 and Figure 15 , in one embodiment, the hub structure 21 includes a hub 211 and a plurality of fan blades 212. The hub 211 is provided with a suction port 21a and a fixing cavity 21b, and the outer wall of the hub 211 is further provided with a plurality of communication openings 21c which are in communication with the fixing cavity 21b and are arranged along the circumferential direction of the hub 211. The plurality of fan blades 212 are connected to the hub 211, and the fan blades 212 are provided with a through channel which is in communication with the communication openings 21c. The blade structure 22 is spliced on the side of the fan blade 212 away from the hub 211, and the flow channel 22a is in communication with the channel.

[0063] The fluid will high-intensity scouring fixed cavity 21b and the junction between the channel is weak, if the blade structure 22 is directly connected to the hub 211, it will cause the thickness and wear resistance of the connection between the blade structure 22 and the hub 211 to be reduced, therefore, in the embodiment, the peripheral wall of the hub 211 extends outward to form a fan blade 212, the fan blade 212 is integrally formed with the hub 211, the fan blade 212 is arranged around the communication port 21c of the hub 211, can thicken the inner wall at the communication port 21c and reinforce the circumference of the communication port 21c, enhance the wear resistance of the communication port 21c, prolong the service life of the impeller.

[0064] In the embodiment, the fluid enters the fixed cavity 21b of the hub 211 from the suction port 21a, enters the channel from the fixed cavity 21b through the communication port 21c, and enters the flow passage 22a from the channel, and finally is discharged from the flow passage 22a.

[0065] It should be understood that the blade structure 22 and the hub structure 21 can be connected by bonding, clamping, bolting, etc.

[0066] Specifically, as shown in Figure 12 and Figure 16 In one of the embodiments, the side of the fan blade 212 away from the hub 211 forms a first matching structure (not shown in the figure), the side of the blade structure 22 facing the fan blade 212 forms a second matching structure 22f, one of the first matching structure and the second matching structure 22f is a fourth protrusion, and the other is a fourth recess, and the fourth protrusion is inserted into the fourth recess. After the fourth protrusion is inserted into the fourth recess, adhesive can be further injected into the connection between the fourth protrusion and the fourth recess to strengthen the connection strength of the inner walls of the fourth protrusion and the fourth recess, and fix the fourth protrusion in the fourth recess.

[0067] The fourth protrusion is accurately inserted into the fourth recess to form a large area of mechanical contact and fitting, and this connection mode can extremely effectively transmit and disperse the fluid dynamic load and centrifugal force borne by the blade structure 22 to the fan blade 212 and the entire hub 211 structure, it provides bending and torsional stiffness far exceeding simple bolting or planar bonding, ensures the structural integrity and operating stability of the impeller under high-speed and heavy-load working conditions, and greatly reduces the risk of loosening or fatigue failure; the cooperation of the fourth protrusion and the fourth recess is a natural positioning guide itself. When assembling, the fourth recess and the fourth protrusion only need to be aligned and pushed in, and the circumferential and radial accurate limiting can be automatically realized; at the same time, it can also have a synergistic effect with the second protrusion 22b, the second recess 22c, the third recess 22d and the third protrusion 22e, after the fourth protrusion is inserted into the fourth recess, the adjacent blade structure 22 uses the cooperation of the second protrusion 22b, the second recess 22c, the third recess 22d and the third protrusion 22e, which can limit the fourth protrusion from leaving the fourth recess.

[0068] As shown in Figure 16 one of the embodiments, the channel and the flow passage 22a gradually increase in diameter in the direction away from the hub 211.

[0069] The fluid is accelerated under the action of the impeller rotation, obtains high-speed kinetic energy, the flow passage 22a is designed in a gradually expanding shape, similar to the reverse application of the Laval nozzle, which can make the speed of the fluid decrease smoothly, according to the Bernoulli principle, the kinetic energy is effectively converted into static pressure energy, thereby significantly improving the outlet pressure and overall efficiency of the pump or fan.

[0070] As shown in Figure 15 one of the embodiments, the plurality of blades 212 are sequentially connected end to end in the circumferential direction of the hub 211, and the connection is located at the outer peripheral wall of the hub 211.

[0071] The root of the blade 212 is connected with the outer peripheral wall of the hub 211 to form a rigid and integral central disc body, which can extremely effectively transmit and disperse the huge centrifugal force and fluid load from the blade structure 22 to the entire hub 211, greatly enhancing the structural strength and rigidity of the impeller, so that it can withstand higher rotational speed and load.

[0072] As shown in Figure 16 one of the embodiments, an annular protrusion 22g is formed on the side of the blade structure 22 away from the central hub structure 21, and the annular protrusion 22g is arranged around the opening of the flow passage 22a.

[0073] In this embodiment, the annular protrusion 22g plays the role of a reinforcing ring, which can effectively constrain the outer edge of the easily deformed blade structure 22, prevent it from twisting or fluttering under high-speed operation, and improve the rigidity and operation stability of the blade structure 22.

[0074] In order to strengthen the edge impact strength of the impeller device 2, as shown in Figure 17 one of the embodiments, the impeller device 2 further comprises a reinforcing assembly 23, which is arranged at the end of the impeller device 2 and at the edge position of the blade structure 22 away from the central hub structure 21. The reinforcing assembly 23 comprises a plurality of reinforcing blocks 231, which are connected to the outer edge of the blade structure 22 and are arranged in abutment in the circumferential direction of the impeller device 2.

[0075] In this application, by arranging a plurality of reinforcing blocks 231, the reinforcing blocks 231 are arranged at the outer edge of the blade structure 22. When the particles in the material impact the reinforcing blocks 231, even if part of the reinforcing blocks 231 cracks, the crack cannot spread to the adjacent reinforcing blocks 231, avoiding the crack spreading to cause the rotor to fail too quickly.

[0076] In impeller assembly 2, the suspended portion in the middle of blade structure 22 is a structural weak point. Therefore, as follows: Figure 17 As shown, in one embodiment, a plurality of reinforcing blocks 231 are distributed in the suspended portion in the middle of the blade structure 22, and the wear resistance of the reinforcing blocks 231 is higher than that of the blade structure 22.

[0077] In this embodiment, by placing the reinforcing block 231 in the suspended part of the middle of the blade structure 22, the reinforcing block 231 can strengthen the suspended part of the blade structure 22 and strengthen the weak part of the blade structure 22. At the same time, since the wear resistance of the reinforcing block 231 is higher than that of the blade structure 22, it can strengthen the wear resistance of the suspended part of the blade structure 22.

[0078] It should be understood that the reinforcing block 231 can be made of silicon carbide ceramic, boron carbide ceramic, zirconium oxide ceramic, etc.

[0079] It should be understood that the number of reinforcement components 23 can be one, two, or more, specifically, such as Figure 17 As shown, in one embodiment, there are multiple reinforcing components 23, and two reinforcing components are respectively provided on the upper and lower sides of each plurality of blade structures 22.

[0080] Multiple reinforcing components 23 can reinforce each overhang of the blade structure 22.

[0081] like Figure 17 As shown, in one embodiment, the impeller device 2 further includes a cover 24 and a first metal frame 25. The cover 24 is disposed at the end of the impeller device 2, and the first metal frame 25 is disposed between the cover 24 and the blade structure 22, and connects the blade structure 22 and the cover 24; the reinforcing block 231 is snapped into the first metal frame 25.

[0082] In this embodiment, the first metal frame 25 is disposed between the cover 24 and the blade structure 22, which can strengthen the strength of the cover 24 and the blade structure 22, and enhance the impact resistance and toughness of the impeller device 2.

[0083] To protect the upper and lower ends of the blade structure 22, therefore, as follows: Figure 18 As shown, in one embodiment, the blade structure 22 is provided with a first metal frame 25 and a cover 24 on both the upper and lower sides. The impeller device 2 also includes a second metal frame 26, which is embedded in the fixed channel 2a and connected to the two first metal frames 25.

[0084] By setting the second metal framework 26, the second metal framework 26 is connected with the two first metal frameworks 25, so that the two first metal frameworks 25 and the second metal framework 26 form an integral whole, so that the stress of the impeller can be transmitted and dispersed through the integral first metal framework 25 and the second metal framework 26. Among them, the second metal framework 26 and the two first metal frameworks 25 can be connected by welding, clamping, screw connection and the like.

[0085] It should be understood that between the reinforcing block 231 and the blade structure 22, the reinforcing block 231 and the blade structure 22 can be connected by bonding, clamping, screw connection and the like, as shown in Figure 18 and Figure 19 In one of the embodiments, the reinforcing block 231 is clamped with the first metal framework 25.

[0086] In this embodiment, the reinforcing block 231 can be installed on the first metal framework 25 by clamping, realizing the fixed connection of the first metal framework 25 and the reinforcing block 231.

[0087] As shown in Figure 19 In one of the embodiments, the outer edge of the first metal framework 25 is formed with a first clamping structure 25a, and the first clamping structure 25a is arranged along the circumference of the impeller device 2; The outer edges of the blade structure 22 and the cover 24 are provided with notches 2b; The reinforcing block 231 is formed with a second clamping structure 231a, and the reinforcing block 231 is clamped with the first clamping structure 25a through the second clamping structure 231a, and the reinforcing block 231 can slide relative to the first clamping structure 25a along the circumference of the impeller device 2, and the reinforcing block 231 is arranged at the notch 2b, and among the plurality of reinforcing blocks 231, the two reinforcing blocks 231 at both ends abut against the two opposite inner walls of the notch 2b. It should be understood that the first clamping structure 25a can be a buckle, a clamping block protruding outward, a clamping groove and the like.

[0088] In this embodiment, the reinforcing block 231 is clamped between the first metal framework 25 and the reinforcing block 231 through the first clamping structure 25a, and when the reinforcing block 231 is installed, the reinforcing block 231 is sleeved on the first clamping structure 25a along the circumference of the impeller device 2 and is slid, and the plurality of reinforcing blocks 231 are clamped and connected with the first clamping structure 25a in turn, realizing the installation of the reinforcing block 231 on the blade structure 22.

[0089] In order to avoid the reinforcing block 231 from sliding along the circumference of the center hub structure 21 after installation, for this purpose, as shown in Figure 17 In one of the embodiments, the outer edges of the blade structure 22 and the cover 24 are provided with notches 2b, and the reinforcing block 231 is arranged at the notch 2b, and among the plurality of reinforcing blocks 231, the two reinforcing blocks 231 at both ends abut against the two opposite inner walls of the notch 2b.

[0090] In the embodiment, the reinforcing block 231 is sleeved on the metal framework, and the cover body 24 is connected to the metal framework, so that the cover body 24 and the gap 2b of the blade structure 22 can limit the sliding of the reinforcing block 231 along the circumference of the hub structure 21, and the sliding of the reinforcing block 231 relative to the hub structure 21 is avoided.

[0091] It should be understood that the gap 2b can be formed in the blade structure 22, or the gap 2b can be formed in the cover body 24, or the gap 2b can be formed in the cover body 24 and the blade structure 22.

[0092] It should be understood that the cover body 24 can be an integral structure, or can be formed by splicing a plurality of components, and specifically, as shown in Figure 17 In one embodiment, the cover body 24 includes a plurality of cover plates 241, the plurality of cover plates 241 are arranged along the circumference of the hub structure 21, and adjacent cover plates 241 abut each other, and part of the plurality of cover plates 241 form the gap 2b.

[0093] In the embodiment, the plurality of cover plates 241 are spliced to form the cover body 24, and the splicing of the plurality of cover plates 241 with relatively small sizes can process a large-size cover body 24, which is convenient for realizing the large size of the impeller; and the gap 2b of the cover plate 241 can fix the position of the reinforcing block 231 along the circumference of the cover body 24.

[0094] It should be understood that, in order to enable the second clamping structure 231a of the reinforcing block 231 to be sleeved on the first clamping structure 25a, a gap is required to be reserved between the first clamping structure 25a and the end inner wall of the gap 2b, so that the reinforcing block 231 is inserted between the first clamping structure 25a and the end inner wall of the gap 2b, and then the reinforcing block 231 is slid, so that the plurality of reinforcing blocks 231 are sequentially sleeved on the first clamping structure 25a of the first metal framework 25, and the reinforcing block 231 located at the gap 2b is sleeved on the outer edge of the first metal framework 25 through the second clamping structure 231a, and is fixedly connected with the first metal framework 25, the cover body 24 and the blade structure 22 through an adhesive.

[0095] During the operation of the rotor, a small amount of fluid will enter between the cover plate 241 and the volute 111, and if the fluid stays between the cover plate 241 and the volute 111 for a long time, the particles in the fluid will wear the cover plate 241 and the volute 111, and therefore, as shown in Figure 17 In one embodiment, the cover plate 241 forms a flow guide channel 241b with the adjacent cover plate 241, the flow guide channel 241b is in a direction away from the suction port 21a, the cross-sectional size of the flow guide channel 241b gradually increases and then gradually decreases, and one end of the flow guide channel 241b close to the suction port 21a is closed and the side away from the suction port 21a is open.

[0096] In the embodiment, the flow channel 241b is arranged, when the fluid enters between the cover plate 241 and the volute 111, the fluid enters the flow channel 241b of the rotating rotor, under the centrifugal force of the rotor, the fluid in the flow channel 241b is guided out, avoiding the fluid staying between the cover plate 241 and the turbine.

[0097] In order to strengthen the connection between the blade structure 22, the first metal framework 25, the cover 24 and the reinforcing block 231, for this purpose, as shown in Figure 18 and Figure 19 In one embodiment, the rotor device further comprises a second adhesive layer 27, which is arranged between the blade structure 22 and the first metal framework 25, between the cover 24 and the first metal framework 25, and between the first clamping structure 25a and the second clamping structure 231a.

[0098] In the embodiment, the second adhesive layer 27 connects the first metal framework 25, the cover 24, the reinforcing block 231 and the blade structure 22 to form a whole, realizing the fixed connection of the structure on the impeller device 2, at the same time, the second adhesive layer 27 fills the gap between the adjacent reinforcing blocks 231.

[0099] It should be understood that the second adhesive layer 27 can be cured from an epoxy adhesive, or from a resin and silicon carbide sand, or from other adhesives.

[0100] It should be understood that the cover 24 and the first metal framework 25 can be connected by adhesion, screws and bolts, specifically, as shown in Figure 5 In one embodiment, the cover 24 is provided with a countersunk hole 24a relative to the first metal framework 25; the impeller device 2 further comprises a connecting piece 28, the connecting piece 28 comprising a connecting bolt 281, a plugging block 282 and a third adhesive layer 283, the threaded end of the connecting bolt 281 passes through the countersunk hole 24a and is threadedly connected with the first metal framework 25, the plugging block 282 is arranged in the countersunk hole 24a, the outer diameter of the plugging block 282 gradually decreases in the direction away from the countersunk hole 24a, the third adhesive layer 283 is embedded in the countersunk hole 24a and connects the inner wall of the countersunk hole 24a and is fitted on the plugging block 282.

[0101] In the embodiment, the cover 24 and the first metal framework 25 are connected by the connecting bolt 281, realizing the stable connection of the cover 24 and the first metal framework 25. In order to avoid the head of the bolt protruding from the cover 24, the countersunk hole 24a is arranged in the embodiment, and the threaded end of the connecting bolt 281 passes through the countersunk hole 24a. The countersunk hole 24a avoids the bolt head protruding, ensures the smoothness of the outer wall of the impeller, and reduces the eddy current and wear. The connecting bolt 281 provides mechanical connection, the plugging block 282 is arranged in the countersunk hole 24a, which can avoid the slurry transported by the delivery pump from entering the countersunk hole 24a to wear the connecting bolt 281. The third adhesive layer 283 is arranged in the countersunk hole 24a, the third adhesive layer 283 can bond the plugging block 282 and the connecting bolt 281, fix the plugging block 282 and the connecting bolt 281 in the countersunk hole 24a, and the tapered plugging block 282 forms a wedge-tight effect under the action of the adhesive, effectively avoiding the plugging block 282 from separating from the countersunk hole 24a. The third adhesive layer 283 completely seals the connecting point, preventing the slurry from seeping into the metal connecting piece 28.

[0102] When the impeller device 2 works, the fluid flows through the flow surface of the blade structure 22. In order to further strengthen the wear resistance of the flow surface of the blade structure 22, as shown in the embodiment, the first metal framework 25 is provided with the third fixed hole 25b, and the inner wall of the flow channel 22a of the blade structure 22 is provided with the fourth fixed hole 22h relative to the third fixed hole 25b. The impeller device 2 further comprises the wear-resistant part 29, which is inserted into the third fixed hole 25b and the fourth fixed hole 22h. The third fixed hole 25b and the fourth fixed hole 22h can be injected with adhesive, and the adhesive can fix the wear-resistant part 29 in the third fixed hole 25b and the fourth fixed hole 22h. Figure 6 The surface of the blade flow channel 22a is one of the most severely worn areas. By selecting a material more resistant to wear than the blade structure 22, such as silicon carbide ceramic, tungsten carbide, etc., to make the wear-resistant part 29, the severely worn area of the blade structure 22 is protected, and the service life of the blade is significantly prolonged. By inserting the wear-resistant part 29 through the blade structure 22 and the first metal framework 25, the connection between the blade structure 22 and the first metal framework 25 is realized, and the connection strength between the blade structure 22 and the first metal framework 25 can be strengthened.

[0103] In order to strengthen the connection between the cover 24 and the first metal framework 25, as shown in the embodiment, in one of the embodiments, one of the cover 24 and the first metal framework 25 is formed with a protrusion, and the other is formed with a groove. The protrusion is embedded in the groove to form a concave-convex fitting.

[0104] Figure 6

[0105] ​​A concave-convex interlocking structure is provided between the cover 24 and the first metal frame 25, which can position the relative position between the blade and the cover 24. At the same time, the concave-convex structure increases the contact area between the cover 24 and the first metal frame 25, improving the bonding strength. The mechanical interlocking structure can share some of the working load, such as shear force, reducing the burden of relying solely on adhesive and making the connection more reliable.

[0106] Furthermore, a fifth protrusion 24b is formed at the countersunk hole 24a of the cover 24 facing the first metal frame 25, and a fifth groove 25c is formed in the first metal frame 25 to cooperate with the fifth protrusion 24b. The connecting bolt 281 passes through the fifth protrusion 24b and the fifth groove 25c and is threadedly connected to the first metal frame 25.

[0107] During assembly, the fifth protrusion 24b on the cover 24 precisely engages with the fifth groove 25c of the first metal frame 25. This acts like a mortise and tenon joint, ensuring that there is absolutely no misalignment between the cover 24 and the metal frame in the circumferential and radial directions. The connecting bolt 281 primarily provides axial clamping force, while the task of resisting shear forces is mainly undertaken by this interlocking structure; when the connecting bolt 281 is tightened, the enormous preload generated by the bolt is transmitted through the cover 24. The fifth protrusion 24b structure distributes this concentrated force more evenly to the contact surface of the fifth groove 25c of the metal skeleton, avoiding the huge compressive stress acting entirely on the vulnerable bolt hole area of ​​the ceramic cover 24, greatly reducing the risk of the cover 24 cracking due to stress concentration during installation; the tight fit between the fifth protrusion 24b and the fifth groove 25c itself forms a mechanical sealing barrier between the cover 24 and the metal skeleton, increasing the difficulty of the slurry penetrating to the metal connector 28, and together with the subsequent sealing block 282 and adhesive layer, it constitutes a multi-layer sealing defense.

[0108] like Figure 2 As shown, in one embodiment, the rear end plate 113 and the rear guard plate assembly 14 are provided with mounting holes. The pump also includes a transmission mechanism 3. The housing of the transmission mechanism 3 is connected to the rear end plate 113 by bolts. The transmission shaft of the transmission mechanism 3 is threadedly connected to the side of the impeller device 2 away from the suction port 21a. The transmission shaft passes through the mounting holes and passes through the rear end plate 113 and the rear guard plate assembly 14. The transmission shaft is sealed to the rear end plate 113 and the rear guard plate assembly 14 by a fit or a sealing ring.

[0109] The specific embodiments of the present invention described above do not constitute a limitation on the scope of protection of the present invention. Any other corresponding changes and modifications made in accordance with the technical concept of the present invention should be included within the scope of protection of the claims of the present invention.

Claims

1. A delivery pump characterized by, The shell device comprises a shell assembly, a plurality of inner liner assemblies, a front guard plate assembly and a rear guard plate assembly, the shell assembly is formed with a cavity, the plurality of inner liner assemblies are arranged in the cavity and are spliced to form an inner container, the front guard plate assembly and the rear guard plate assembly are arranged at two ends of the inner container and are spliced with the inner container, and the front guard plate assembly is formed with an inhalation passage communicated with the inner container. The impeller device arranged in the inner container comprises a hub structure and a plurality of blade structures, the hub structure is provided with an inhalation port and a fixed cavity communicated with the inhalation port, the plurality of blade structures are spliced with the hub structure and are sequentially arranged along the circumference of the hub structure, and the blade structure is provided with a flow channel penetrating through the blade structure, and the flow channel is communicated with the fixed cavity.

2. The delivery pump according to claim 1, wherein the shell assembly comprises a volute, a front end plate and a rear end plate, the volute has a cavity, and both ends of the volute are provided with mounting channels adjacent to the cavity, and the front end plate and the rear end plate are arranged in the two mounting channels and are detachably connected with the volute; the size of the inner liner assembly is smaller than the inner diameter of the mounting channel, so that the inner liner assembly can enter the cavity through the mounting channel.

3. The delivery pump according to claim 1, wherein the front guard plate assembly comprises a panel and a plurality of pipe bodies, the panel is spliced with the inner container and is connected with the shell assembly, the panel is provided with a through hole, the plurality of pipe bodies are coaxially arranged and are sequentially spliced, the pipe body at one end is spliced with the panel and is communicated with the through hole, and the inner diameters of the plurality of pipe bodies gradually increase in the direction away from the through hole.

4. The delivery pump according to claim 1, wherein the side of the plurality of blade structures away from the hub structure is sequentially clamped along the circumference of the hub structure.

5. The delivery pump according to claim 1, wherein the impeller device further comprises a reinforcing assembly, the reinforcing assembly is arranged at the edge of the blade structure away from the hub structure, the reinforcing assembly comprises a plurality of reinforcing blocks, the plurality of reinforcing blocks are connected with the outer edge of the blade structure and are sequentially abutted along the circumference of the impeller device.

6. The delivery pump according to claim 5, wherein the impeller device further comprises a cover and a first metal framework, the cover is arranged at the end of the impeller device, the first metal framework is arranged between the cover and the blade structure and is connected with the blade structure and the cover; the reinforcing blocks are clamped with the first metal framework.

7. The delivery pump according to claim 6, wherein the outer edge of the first metal framework is formed with a first clamping structure, the first clamping structure is arranged along the circumference of the impeller device; and the outer edges of the blade structure and the cover are both provided with notches. ​ The reinforcing block is formed with a second clamping structure, the reinforcing block is clamped with the first clamping structure through the second clamping structure, and the reinforcing block can slide relative to the first clamping structure along the circumference of the impeller device, the reinforcing block is arranged at the gap, and two reinforcing blocks at both ends of the plurality of reinforcing blocks abut two opposite inner walls of the gap respectively.

8. The delivery pump of claim 6, wherein, The cover is provided with a countersunk hole relative to the first metal framework; The impeller device further comprises a connecting piece, the connecting piece comprises a connecting bolt, a blocking block and a first adhesive layer, the threaded end of the connecting bolt passes through the countersunk hole and is threadedly connected with the first metal framework, the blocking block is arranged in the countersunk hole, the outer diameter of the blocking block gradually decreases in the direction away from the countersunk hole, and the first adhesive layer is embedded in the countersunk hole and connected with the inner wall of the countersunk hole and is fitted on the blocking block.

9. The delivery pump of claim 6, wherein, The first metal framework is provided with a first fixing hole, and the inner wall of the flow channel of the blade structure is provided with a second fixing hole relative to the first fixing hole; The impeller device further comprises a wear-resistant part, and the wear-resistant part is inserted into the first fixing hole and the second fixing hole.

10. The delivery pump of claim 6, wherein, The cover and one of the first metal frameworks are formed with a protrusion, and the other is formed with a groove, wherein the protrusion is embedded in the groove to form a concave-convex fitting.

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