A housing structure and a fluid delivery device

Abstract

The utility model discloses a kind of shell structure and fluid conveying device, shell structure includes shell assembly and multiple inner liner assemblies, shell assembly has cavity, and the outer wall of shell assembly is equipped with the installation channel being communicated with cavity;Multiple inner liner assemblies are built-in cavity and are spliced to form inner bag, the size of inner liner assembly is set to be less than the inner diameter of installation channel, so that inner liner assembly can enter cavity through installation channel.When shell structure is assembled, multiple inner liner assemblies are sent into cavity through installation channel, then assembled to form inner bag in cavity, inner liner assembly can protect the inner wall of cavity, at the same time, since inner liner assembly enters cavity through installation channel, shell assembly does not need to be set to half structure, in the case where preset structure strength is reached, the thickness of integral shell assembly is thinner, the thickness of shell assembly does not need to be thickened, the weight of shell assembly and the cost of shell assembly are reduced.

Description

Technical Field

[0001] This utility model relates to the field of fluid transport device housing technology, specifically to a housing structure and a fluid transport device. Background Technology

[0002] Fluid transport devices are various types of pumps used to transport fluids. Fluid transport devices generally include a pump casing and a rotatable impeller built into the pump casing, through which fluids are transported.

[0003] Publication No. CN208073778U discloses a silicon carbide ceramic volute for heavy-duty slurry pumps, comprising silicon carbide ceramic, a first metal frame, a second metal frame, and a locking assembly. The first and second metal frames are inlaid on the outside of the silicon carbide ceramic. The locking assembly is used to fix the first and second metal frames. Assembly gaps are left between the first and second metal frames and the silicon carbide ceramic, and the assembly gaps are filled with resin adhesive. By setting silicon carbide ceramic inside the metal frame, the wear resistance of the inner wall of the metal frame can be strengthened.

[0004] In the aforementioned volute, in order to embed the silicon carbide ceramic liner into the metal outer shell, the metal outer shell is designed as two halves. First, the two metal outer shells are separated, and then the silicon carbide ceramic liner is installed. After the silicon carbide ceramic liner is installed, the two metal outer shells are connected by a locking assembly. After the metal outer shell is split in half, in order to achieve the set structural strength, the two metal outer shells need to be thickened so that the assembled metal outer shell meets the set structural strength requirements. Thickening the metal outer shell increases the weight of the shell and the cost. Utility Model Content

[0005] The purpose of this utility model is to overcome the above-mentioned technical deficiencies and propose a shell structure and fluid conveying device to solve the technical problem that the thickness and weight of the metal shell increase after the silicon carbide ceramic liner is embedded in the prior art.

[0006] To achieve the above-mentioned technical objectives, the present invention adopts the following technical solution: In a first aspect, this utility model provides a shell structure, comprising: A housing assembly having a cavity, and the outer wall of the housing assembly having an installation channel communicating with the cavity; and Multiple liner components are built into the cavity and spliced ​​together to form an inner liner. The size of the liner components is set to be smaller than the inner diameter of the installation channel so that the liner components can enter the cavity through the installation channel.

[0007] In one embodiment, the cavity is vortex-shaped, the shape of the inner liner matches the shape of the cavity, and the inner liner is circumferentially positioned through the cavity.

[0008] In one embodiment, an interlocking structure is formed between adjacent liner components.

[0009] In one embodiment, the housing assembly includes a volute and a diffuser tube. The volute is hollow inside and has a first fixing hole and a second fixing hole at its end and peripheral wall, respectively. The diffuser tube is connected to the volute and is arranged along the tangential direction of the volute. The diffuser tube has a through hole that communicates with the second fixing hole. The through hole and the first fixing hole form the mounting channel.

[0010] In one embodiment, the plurality of inner liner components are respectively a first inner liner and a second inner liner. There are multiple first inner liners, and the size of the plurality of first inner liners is set to be smaller than the size of the first fixing hole and can enter the volute through the first fixing hole. The size of the second inner liner is set to be smaller than the size of the second fixing hole and can enter the diffuser through the second fixing hole.

[0011] In one embodiment, a plurality of the first inner liner members are arranged sequentially along the circumference of the cavity and are connected end to end.

[0012] In one embodiment, an installation space is formed between the first inner liner of the volute located at the first position and the second to last first inner liner for mounting the last first inner liner. The installation space is stepped and at least partially increases in size along the direction close to the center of the cavity. The last first inner liner can be inserted into the installation space from the center of the cavity.

[0013] In one embodiment, the lining assembly has reinforcing ribs on the side opposite to the center of the cavity.

[0014] In one embodiment, the shell structure further includes an adhesive layer disposed between the inner liner and the inner wall of the cavity.

[0015] Secondly, this utility model also provides a fluid conveying device, including the aforementioned housing structure.

[0016] Compared with the prior art, the shell structure and fluid conveying device provided by this utility model, when assembling the shell structure, send multiple inner lining components into the cavity through the installation channel, and then assemble them in the cavity to form the inner liner. The inner lining components can protect the inner wall of the cavity. At the same time, since the inner lining components enter the cavity through the installation channel, there is no need to set the outer shell component as a split structure. Under the premise of achieving the preset structural strength, the thickness of the integral outer shell component is thinner, and there is no need to thicken the outer shell component, thus reducing the weight and cost of the outer shell component. Attached Figure Description

[0017] Figure 1 This is a cross-sectional view of the shell structure provided in an embodiment of the present utility model; Figure 2 yes Figure 1 A magnified view of a portion of point A in the middle; Figure 3 yes Figure 1 A magnified view of a portion of point B in the middle; Figure 4 This is a cross-sectional view of the outer shell assembly in the shell structure provided in this embodiment of the utility model; Figure 5 This is a cross-sectional view of the inner lining component in the shell structure provided in this embodiment of the utility model when they are assembled.

[0018] Explanation of reference numerals in the attached figures: Casing assembly 1; cavity 1a; mounting channel 1b; volute 11; first fixing hole 11a; second fixing hole 11b; filling port 11c; diffuser tube 12; through hole 12a; sealing plug 13; Inner liner assembly 2; protrusion 2a; groove 2b; first inner liner 21; first inner liner 211 located at the first position; first inner liner 212 located at the second to last position; first inner liner 213 located at the last position; second inner liner 22; reinforcing rib 23; Adhesive layer 3. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0020] To address the technical problem of increased thickness and weight of the metal casing after embedding a silicon carbide ceramic liner, this invention provides a casing structure and fluid conveying device that can achieve silicon carbide liner installation while avoiding increased casing weight.

[0021] It should be noted that the shell structure described in this utility model is used in, but not limited to, fluid conveying devices. For ease of explanation, this utility model only uses the application of the shell structure in a fluid conveying device as an example. The principle of the shell structure applied to other types of equipment is essentially the same as that applied to a fluid conveying device, and will not be elaborated here.

[0022] Please see Figure 1 , Figure 1 This is a cross-sectional view of the shell structure in one embodiment of the present invention. The shell structure includes an outer shell assembly 1 and multiple inner liner assemblies 2. The outer shell assembly 1 has a cavity 1a, and the outer wall of the outer shell assembly 1 has an installation channel 1b that communicates with the cavity 1a. The multiple inner liner assemblies 2 are built into the cavity 1a and spliced ​​together to form an inner liner. The size of the inner liner assemblies 2 is set to be smaller than the inner diameter of the installation channel 1b, so that the inner liner assemblies 2 can enter the cavity 1a through the installation channel 1b.

[0023] Specifically, when assembling the shell structure, multiple inner lining components 2 are sent into the cavity 1a through the installation channel 1b, and then assembled in the cavity 1a to form the inner liner. The inner lining components 2 can protect the inner wall of the cavity 1a. At the same time, since the inner lining components 2 enter the cavity 1a through the installation channel 1b, it is not necessary to set the outer shell component 1 as a split structure. Under the condition of achieving the preset structural strength, the thickness of the integral outer shell component 1 is relatively thin, and there is no need to thicken the outer shell component 1, thereby reducing the weight and cost of the outer shell component 1.

[0024] It should be understood that the cavity 1a can be circular, involute, etc., specifically, such as Figure 1 and Figure 4 As shown, in one embodiment, the cavity 1a is vortex-shaped, and the shape of the inner liner matches the shape of the cavity 1a, with the inner liner being circumferentially positioned via the cavity 1a.

[0025] In this embodiment, by setting the cavity 1a as a vortex, when the shape of the inner liner matches the shape of the cavity 1a, the inner wall of the vortex-shaped cavity 1a can position the inner liner circumferentially, and since the inner liner matches the inner wall of the cavity 1a, the arc surface of the inner liner can position the inner liner axially.

[0026] It should be understood that adjacent lining components 2 can be connected and fixed with bolts, bolts, and adhesives. Specifically, for example... Figure 2 As shown, in one embodiment, an interlocking structure is formed between adjacent liner components 2.

[0027] In this embodiment, the adjacent inner lining components 2 are fitted together by concave and convex structures, which can fix and position the adjacent inner lining components 2. At the same time, during the process of the concave and convex structures fitting together, a maze structure can be formed to prevent fluid from passing between the adjacent inner lining components 2, which can effectively prevent fluid from passing through the splice of the adjacent inner lining components 2.

[0028] The end of the inner lining component 2 where it is spliced ​​is provided with both a protrusion 2a and a groove 2b, and the protrusion 2a and groove 2b are fitted into each other with the protrusion 2a and groove 2b of the adjacent inner lining component 2.

[0029] It should be understood that the housing assembly 1 can be the housing of various types of pump bodies, such as Figure 4 As shown, specifically, in one embodiment, the outer casing assembly 1 includes a volute 11 and a diffuser tube 12. The volute 11 is hollow inside, and a first fixing hole 11a and a second fixing hole 11b are respectively provided at its end and on its peripheral wall. The diffuser tube 12 is connected to the volute 11 and is arranged along the tangential direction of the volute 11. The diffuser tube 12 has a through hole 12a that communicates with the second fixing hole 11b. The through hole 12a and the first fixing hole 11a form an installation channel 1b.

[0030] In this embodiment, the outer shell assembly 1 includes a volute 11 and a diffuser tube 12. The volute 11 and the diffuser tube 12 are combined to form a vortex-shaped cavity 1a. The inner liner assembly 2 can be entirely inserted into the volute 11 and the diffuser tube 12 through the first fixing hole 11a of the volute 11, or it can be partially inserted into the volute 11 through the first fixing hole 11a and the other part inserted into the diffuser tube 12 through the through hole 12a for installation, so that the inner liner assembly 2 can be inserted into the integral outer shell assembly 1.

[0031] It should be understood that the volute 11 and diffuser 12 can be processed separately and then assembled. Specifically, in one embodiment, the volute 11 and diffuser 12 are integrally cast parts. By casting, the volute 11 and diffuser 12 are integrally formed without subsequent processing. Moreover, the structure of the cast part is lighter in thickness and weight than the assembled part while achieving the same structural strength.

[0032] like Figure 1 and Figure 5 As shown, in one embodiment, the plurality of inner liner components 2 are respectively a first inner liner 21 and a second inner liner 22. There are multiple first inner liner components 21. The size of the plurality of first inner liner components 21 is set to be smaller than the size of the first fixing hole 11a, and can enter the volute 11 through the first fixing hole 11a. The size of the second inner liner component 22 is set to be smaller than the size of the second fixing hole 11b, and can enter the diffuser 12 through the second fixing hole 11b.

[0033] In this embodiment, the inner liner assembly 2 is divided into a first inner liner 21 and a second inner liner 22. Multiple first inner liners 21 enter the volute 11 through the first fixing hole 11a to form a vortex structure that matches the inner wall of the volute 11. The second inner liner 22 is installed into the diffuser 12 through the through hole 12a of the diffuser 12 and is fitted with the first inner liner 21 using a concave-convex structure. At the same time, the structure formed by the combination of the second inner liner 22 and the first inner liner 21 is connected.

[0034] It should be understood that the number of the first inner lining piece 21 can be two, three, four, five, six, seven, eight, etc.

[0035] It should be understood that the multiple first inner liner pieces 21 can be divided into multiple pieces along the circumference of the volute 11 to match the inner cavity shape of the volute 11, and then the divided first inner liner pieces 21 are spliced ​​together in the volute 11 to form a vortex structure that matches the inner cavity shape of the volute 11.

[0036] It should be understood that the multiple first inner liner components 21 can be installed and connected in various ways, specifically, such as Figure 5 As shown, in one embodiment, a plurality of first inner lining members 21 are sequentially spliced ​​along the circumference of the cavity 1a and connected end to end.

[0037] In this embodiment, by sequentially splicing multiple first inner lining pieces 21 along the circumference of the cavity 1a, once the vortex-shaped cavity 1a positions one of the first inner lining pieces 21, the other first inner lining pieces 21 can also be positioned through the inner lining piece. By sequentially connecting end to end, all the first inner lining pieces 21 can be positioned circumferentially.

[0038] Since multiple first inner lining pieces 21 are sequentially spliced ​​along the circumference of the cavity 1a, and the splicing adopts a concave-convex structure, when splicing to the penultimate first inner lining piece 21, this first inner lining piece 21 needs to be connected to both the second-to-last first inner lining piece 21 and the first first inner lining piece 21. To ensure that the penultimate first inner lining piece 21 can be embedded into both the first and second-to-last first inner lining pieces 21, and also to achieve a snap-fit ​​connection using a concave-convex structure, therefore, as follows... Figure 5 As shown, in one embodiment, an installation space is formed between the first inner liner 21 located at the first position and the second to last first inner liner 21 for the installation of the last first inner liner 21. The installation space is stepped and at least partially increases in size along the direction close to the center of the cavity 1a. The last first inner liner 21 can be inserted into the installation space from the center of the cavity 1a.

[0039] like Figure 5As shown, for ease of understanding, the first inner liner located at the beginning is marked as 211, the second to last first inner liner is marked as 212, and the last first inner liner is marked as 213. In this embodiment, the installation space between the first inner liner 211 at the beginning and the second to last first inner liner 212 at the end is stepped, and the step increases at least partially along the direction close to the cavity 1a. The step decreases at least partially along the direction close to the inner wall of the cavity 1a, so that the last first inner liner 213 can be inserted into the installation space, and can also be snapped in place by the stepped structure.

[0040] It should be understood that the maximum length of each first inner liner 21 is less than the inner diameter of the first fixing hole 11a, so that the first inner liner 21 can enter the volute 11 through the first fixing hole 11a, and the outer diameter of the second inner liner 22 is less than the inner diameter of the through hole 12a, so that the second inner liner 22 can enter the diffuser 12 through the through hole 12a.

[0041] like Figure 1 As shown, the first inner liner 211 located at the first position is disposed at the connection between the volute 11 and the diffuser tube 12, and the shape of the first inner liner 211 is adapted to the shape of the connection between the volute 11 and the diffuser tube 12. The second inner liner 22 is a tubular structure, and the second inner liner 22 and the first inner liner 211 at the first position are fitted together by a slot and a ring body inserted into the slot.

[0042] like Figure 2 As shown, in one embodiment, the inner liner assembly 2 is provided with a reinforcing rib 23 on the side opposite to the center of the cavity 1a.

[0043] To enhance the structural strength of the inner liner assembly 2, one purpose is to strengthen the structural strength of the first inner liner 21, and the other is to enhance the overall strength of the composite structure.

[0044] like Figure 1 and Figure 3 As shown, in one embodiment, the shell structure further includes an adhesive layer 3, which is disposed between the inner liner and the inner wall of the cavity 1a.

[0045] By setting the adhesive layer 3, the gap between the inner liner component 2 and the cavity 1a can be sealed. At the same time, the adhesive layer 3 can be formed by injecting adhesive into the gap between the inner liner and the cavity 1a. After the adhesive is fixed, the adhesive layer 3 is formed. The adhesive can also penetrate into the gap between adjacent inner liner components 2 to seal the gap between adjacent inner liner components 2. The components of the adhesive can be resin adhesive and a mixture of vertical adhesive and silicon carbide particles, etc.

[0046] In order to allow the adhesive to enter the volute 11 and the diffuser 12, for this purpose, such as Figure 3 As shown, in one embodiment, the top and bottom of the volute 11 are provided with filling ports 11c, which are connected to the interior of the volute 11. The outer shell assembly 1 also includes a sealing plug 13, which is detachably connected to the filling port 11c.

[0047] By providing the filling port 11c, the adhesive can enter the volute 11 and the diffuser tube 12 from the filling port 11c, so that the adhesive can fill the gap between the volute 11 and the first inner liner 21 and the gap between the diffuser tube 12 and the second inner liner 22; by providing the sealing plug 13, the sealing plug 13 can seal the filling port 11c to prevent uncured adhesive from flowing out.

[0048] It should be understood that the first inner liner 21 and the second inner liner 22 can be formed by casting, die casting or other methods. Specifically, in one embodiment, the first inner liner 21 is a 3D printed structure.

[0049] The first inner liner 21 and the second inner liner 22 are produced by 3D printing, eliminating the need for mold forming, which greatly reduces production costs and production cycle and shortens the product manufacturing cycle.

[0050] This utility model also provides a fluid conveying device, including the aforementioned housing structure.

[0051] The fluid conveying device also includes structures such as an impeller (not shown in the figure), which is built into the structure formed by the first inner liner 21.

[0052] The specific embodiments of this utility model described above do not constitute a limitation on the scope of protection of this utility model. Any other corresponding changes and modifications made based on the technical concept of this utility model should be included within the scope of protection of the claims of this utility model.

Claims

1. A shell structure, characterized in that, include: The housing assembly has a cavity, and the outer wall of the housing assembly has an installation channel communicating with the cavity; and Multiple liner components are built into the cavity and spliced ​​together to form an inner liner. The size of the liner components is set to be smaller than the inner diameter of the installation channel so that the liner components can enter the cavity through the installation channel.

2. The shell structure according to claim 1, characterized in that, The cavity is vortex-shaped, and the shape of the inner liner matches the shape of the cavity. The inner liner is circumferentially positioned through the cavity.

3. The shell structure according to claim 1, characterized in that, Adjacent liner components are formed with a mating structure of interlocking protrusions and recesses.

4. The shell structure according to claim 1, characterized in that, The outer casing assembly includes a volute and a diffuser tube. The volute is hollow inside and has a first fixing hole and a second fixing hole at its end and peripheral wall, respectively. The diffuser tube is connected to the volute and is arranged along the tangential direction of the volute. The diffuser tube has a through hole that communicates with the second fixing hole. The through hole and the first fixing hole form the mounting channel.

5. The shell structure according to claim 4, characterized in that, The plurality of inner lining components are a first inner lining component and a second inner lining component. There are multiple first inner lining components. The size of the multiple first inner lining components is set to be smaller than the size of the first fixing hole, and they can enter the volute through the first fixing hole. The size of the second inner lining component is set to be smaller than the size of the second fixing hole, and they can enter the diffuser through the second fixing hole.

6. The shell structure according to claim 5, characterized in that, Multiple first inner lining components are sequentially spliced ​​along the circumference of the cavity, with their ends connected.

7. The shell structure according to claim 6, characterized in that, An installation space is formed between the first inner liner of the volute located at the first position and the second to last first inner liner for installing the last first inner liner. The installation space is stepped and at least partially increases in size along the direction close to the center of the cavity. The last first inner liner can be inserted into the installation space from the center of the cavity.

8. The shell structure according to claim 1, characterized in that, The inner lining assembly has a reinforcing rib on the side opposite to the center of the cavity.

9. The shell structure according to claim 1, characterized in that, It also includes an adhesive layer disposed between the inner liner and the inner wall of the cavity.

10. A fluid conveying device, characterized in that, Includes the shell structure as described in any one of claims 1-9.

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