A protective plate structure and a fluid conveying device

Abstract

This utility model discloses a protective plate structure and a fluid conveying device, including a metal frame, a protective plate assembly, and an adhesive layer. The protective plate assembly includes a panel and a hollow shaft. The panel is disposed on one side of the metal frame and has a through hole. The hollow shaft is coaxially disposed with the through hole and has a boss structure that cooperates with the metal frame. The boss structure is used to restrict the movement of the hollow shaft in the direction close to the panel. The adhesive layer is disposed between the metal frame and the panel and is fitted with the panel using a concave-convex structure. The adhesive layer is also disposed between the hollow shaft and the metal frame. The boss structure cooperates with the metal frame to restrict the movement of the hollow shaft. At the same time, the concave-convex structure between the adhesive layer and the panel further restricts the panel from detaching from the metal frame in a first direction. Through the cooperation between the hollow shaft, the panel, and the metal frame, the detachment of the hollow shaft and the panel from the metal frame can be restricted.

Description

Technical Field

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

[0002] Fluid conveying devices are used to transport fluids. Fluid conveying devices can be various types of pumps. The main flow-through components of fluid conveying devices include impellers, volutes, and guard plates.

[0003] Announcement No. CN209041159U discloses a large silicon carbide ceramic guard plate for pumps, including a first ceramic panel, a ceramic mounting shaft, and a metal frame. The first ceramic panel is spliced ​​together from several first sector panels. The ceramic mounting shaft has a flow hole in the middle and a mounting platform on the top outer side of the ceramic mounting shaft. The side wall of the mounting platform is inclined outward. The small end of the first sector panel cooperates with the mounting platform. The ceramic mounting shaft is fixed in the middle position of the metal frame. The bottom surface of the first sector panel cooperates with the top surface of the metal frame.

[0004] The ceramic mounting shaft is fixed to the metal frame. The mounting platform on the ceramic mounting shaft can limit the first sector panel. However, when the ceramic mounting bearing is subjected to an axial force along the direction close to the first ceramic panel, it may slide relative to the metal frame and push the first ceramic panel away from the metal frame, which may cause the ceramic mounting shaft and the first ceramic panel to detach from the metal frame. Utility Model Content

[0005] The purpose of this utility model is to overcome the above-mentioned technical deficiencies and propose a protective plate structure and fluid conveying device to solve the technical problem that the ceramic mounting shaft and the first ceramic panel are at risk of detaching from the metal frame in the prior art.

[0006] To achieve the above-mentioned technical objectives, the present invention adopts the following technical solution: Firstly, this utility model provides A protective plate structure, characterized in that it comprises: Metal frame; A guard plate assembly includes a panel and a hollow shaft. The panel is disposed on one side of the metal frame and has a through hole. The hollow shaft is coaxially disposed with the through hole and has a boss structure that mates with the metal frame. The boss structure restricts the movement of the hollow shaft in the direction close to the panel. An adhesive layer is disposed between the metal frame and the panel component, and is fitted with the panel component using a concave-convex structure. The adhesive layer is also disposed between the hollow shaft and the metal frame.

[0007] In one embodiment, the panel member has a first mating portion, and the adhesive layer has a second mating portion that mates with the first mating portion. One of the first mating portion and the second mating portion is a protrusion and the other is a groove. The protrusion is at least partially enlarged in size along the protrusion direction.

[0008] In one embodiment, the first mating portion is a groove provided in the panel member, and the groove is at least partially enlarged in size along the depth direction; The second mating part is a protrusion that fits into the groove.

[0009] In one embodiment, the first mating part is a protrusion disposed on the panel member, and the protrusion is at least partially enlarged in size along the protrusion direction; The second mating part is fitted into the groove of the protrusion.

[0010] In one embodiment, the protrusion is divided into a first protrusion and a second protrusion, the dimensions of the first protrusion and the second protrusion are increased at least partially along the protrusion direction, and the height of the second protrusion is greater than the height of the first protrusion; The metal frame is provided with a receiving groove relative to the second protrusion, and the metal frame is sleeved on the second protrusion through the receiving groove; The adhesive layer is also disposed in the gap between the second protrusion and the receiving groove.

[0011] In one embodiment, an annular cavity with an open end is formed on one side of the panel member, the axis of the annular cavity is parallel to the axis of the through hole, and at least one annular groove is formed on the circumferential inner wall of the annular cavity. The metal skeleton is at least partially embedded in the annular cavity; The adhesive layer is also disposed in the annular groove.

[0012] In one embodiment, the panel member is provided with a recessed stop; The hollow shaft is inserted into the recessed stop and is sealed to the inner wall of the recessed stop.

[0013] In one embodiment, the panel is a 3D printed structure.

[0014] In one embodiment, the metal frame has grouting holes; The gap between the panel component and the metal frame is connected to the grouting hole; The gap between the hollow shaft and the metal frame is connected to the grouting hole.

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

[0016] Compared with the prior art, the protective plate structure and fluid conveying device provided by this utility model have a first direction in the axial direction of the hollow shaft, which is closer to the panel component, and a second direction, which is farther away from the panel component. The panel component is disposed on one side of the metal frame. Due to the restriction of the metal frame, the panel component cannot move along the second direction. The hollow shaft has a boss structure that cooperates with the metal frame. The boss structure cooperates with the metal frame to restrict the movement of the hollow shaft along the first direction. Moreover, when the fluid conveying device is working, the fluid generally passes through the hollow shaft along the first direction, and the force borne by the hollow shaft along the second direction is relatively small. By setting an adhesive layer, the adhesive layer connects the hollow shaft, the panel component, and the metal frame to form a whole. At the same time, the adhesive layer and the panel component are cooperated with a concave-convex structure, which can further restrict the panel component from detaching from the metal frame along the first direction. Through the cooperation between the hollow shaft, the panel component, and the metal frame, the hollow shaft and the panel component can be restricted from detaching from the metal frame. Attached Figure Description

[0017] Figure 1 This is a cross-sectional view of a protective plate structure provided in an embodiment of this 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 protective plate structure after separation according to an embodiment of the present invention; Figure 5 yes Figure 4 A magnified view of a portion of point C in the middle; Figure 6 yes Figure 4 A magnified view of a portion of point D in the middle; Figure 7 This is a partial cross-sectional view of the protective plate structure provided in an embodiment of the present invention; Figure 8 This is a schematic diagram of the structure of the protective plate assembly in an embodiment of the present invention; Figure 9 yes Figure 8 Cross-sectional view of the center panel assembly; Figure 10 yes Figure 9 A magnified view of a portion of point E in the middle; Figure 11 This is a schematic diagram of the structure of the protective plate assembly in an embodiment of the present invention; Figure 12 yes Figure 11 Cross-sectional view of the center panel assembly; Figure 13 This is a schematic diagram of the structure of the protective plate assembly in an embodiment of the present invention; Figure 14 yes Figure 13 Cross-sectional view of the center panel assembly.

[0018] Explanation of reference numerals in the attached figures: Metal frame 1; grouting hole 1a; metal protrusion 1b; disc 11; sleeve 12; Protective plate assembly 2; panel piece 21; through hole 21a; first mating part 21b; first protrusion 21b1; second protrusion 21b2; annular cavity 21c; annular groove 21d; concave stop 21e; ​​hollow shaft 22; boss structure 22a; Adhesive layer 3; Second mating part 3a. 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 the risk of the ceramic mounting shaft and the first ceramic panel detaching from the metal frame, this utility model provides a protective plate structure and a fluid conveying device that can achieve a stable connection between the panel, the hollow shaft, and the metal frame.

[0021] It should be noted that the guard plate 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 guard plate structure in a fluid conveying device as an example. The principle of the guard plate structure applied to other types of equipment is essentially the same as that applied to a fluid conveying device, and will not be described in detail here.

[0022] Please see Figures 1 to 3 As shown, Figure 1 This is a schematic diagram of the protective plate structure in one embodiment of the present invention. The protective plate structure includes a metal frame 1, a protective plate assembly 2, and an adhesive layer 3. The protective plate assembly 2 includes a panel 21 and a hollow shaft 22. The panel 21 is disposed on one side of the metal frame 1 and has a through hole 21a. The hollow shaft 22 is coaxially disposed with the through hole 21a. The hollow shaft 22 forms a boss structure 22a that cooperates with the metal frame 1. The boss structure 22a is used to restrict the movement of the hollow shaft 22 in the direction close to the panel 21. The adhesive layer 3 is disposed between the metal frame 1 and the panel 21 and is fitted with the panel 21 using a concave-convex structure. The adhesive layer 3 is also disposed between the hollow shaft 22 and the metal frame 1.

[0023] Specifically, in the axial direction of the hollow shaft 22, the direction closer to the panel piece 21 is the first direction, and the direction farther away from the panel piece 21 is the second direction. The panel piece 21 is disposed on one side of the metal frame 1. Due to the restriction of the metal frame 1, the panel piece 21 cannot move along the second direction. The hollow shaft 22 has a boss structure 22a that cooperates with the metal frame 1. The boss structure 22a cooperates with the metal frame 1 to restrict the hollow shaft 22 from moving along the first direction. Moreover, when the fluid conveying device is working, the fluid generally passes through the hollow shaft 22 along the first direction. The force borne by the hollow shaft 22 along the second direction is relatively small. By setting the adhesive layer 3, the adhesive layer 3 connects the hollow shaft 22, the panel piece 21 and the metal frame 1 to form a whole. At the same time, the adhesive layer 3 and the panel piece 21 are fitted with a concave-convex structure, which can further restrict the panel piece 21 from detaching from the metal frame 1 along the first direction. Through the cooperation between the hollow shaft 22, the panel piece 21 and the metal frame 1, the hollow shaft 22 and the panel piece 21 can be restricted from detaching from the metal frame 1.

[0024] It should be understood that the metal frame 1 can be a metal component of any structure and shape, specifically, such as Figure 4 As shown, in one embodiment, the metal frame 1 includes a connected disc 11 and a sleeve 12. The disc 11 is disposed on the panel 21, and the sleeve 12 is sleeved on the hollow shaft 22 and is coaxially disposed with the hollow shaft 22.

[0025] It should be understood that the boss structure 22a can be a protrusion provided on one side of the hollow shaft 22 or a protruding ring provided at one end of the hollow shaft 22. Specifically, in one embodiment, the boss structure 22a is a ring provided at one end of the hollow shaft 22, and the outer diameter of the ring gradually decreases along the direction close to the panel member 21.

[0026] It should be understood that the panel 21 and the adhesive layer 3 are fitted together through a concave-convex structure. In one embodiment, the panel 21 forms a protrusion, and the adhesive layer 3 wraps around the protrusion to form a groove that matches the protrusion. Fitting is achieved through the cooperation of the protrusion and the groove. In another embodiment, the panel 21 has a groove, the adhesive layer 3 is embedded in the groove, and forms a protrusion that matches the groove. Fitting is achieved through the cooperation of the groove and the protrusion between the cotton petal and the adhesive layer 3. In yet another embodiment, the panel 21 has both protrusions and grooves, and the adhesive layer 3 forms grooves and protrusions that match the protrusions and grooves of the panel 21, thereby achieving fitting between the panel 21 and the adhesive layer 3.

[0027] It should be understood that the materials of panel 21 and hollow shaft 22 can be silicon carbide ceramic, silicon nitride ceramic, silicon nitride composite silicon carbide ceramic, alumina ceramic and zirconium oxide ceramic, etc.; the material of metal skeleton 1 can be cast iron, stainless steel, etc.; the adhesive layer 3 can be formed by curing epoxy resin, or by curing phenolic resin, or by compounding epoxy resin and phenolic resin with other components.

[0028] Because the adhesive used in adhesive layer 3 is generally metal-friendly and ceramic-repellent, the bonding force between adhesive layer 3 and panel 21 is less than the bonding force between adhesive layer 3 and metal skeleton 1. Therefore, as follows: Figure 3 As shown, in one embodiment, the panel member 21 has a first mating portion 21b, and the adhesive layer 3 has a second mating portion 3a that mates with the first mating portion 21b. The second mating portion 3a and the first mating portion 21b are fitted together using a concave-convex structure. One of the second mating portion 3a and the first mating portion 21b is a protrusion and the other is a groove. The protrusion is at least partially enlarged in size along the protrusion direction.

[0029] In this embodiment, based on the use of a concave-convex structure for fitting between the adhesive layer 3 and the panel 21, the protrusion is further enlarged at least locally along the protrusion direction. When the protrusion engages with the groove, an inverted structure is formed, so that the protrusion is stuck in the groove structure, which can further increase the bonding force between the panel 21 and the adhesive layer 3 and prevent the panel 21 from detaching from the metal frame 1.

[0030] It should be understood that, such as Figure 9 and Figure 10 As shown, the protrusion can be a stepped cylinder, that is, it includes a large cylinder and a small cylinder, with the large cylinder located on the side of the small cylinder facing away from the panel 21, as shown. Figures 11 to 14 As shown, the protrusions can also be structures with progressively increasing outer diameters, such as a conical structure; the grooves can be set as dovetail grooves, conical grooves, trapezoidal grooves, etc. When the panel part 21 is provided with a groove, the inner diameter of the groove increases along the direction of penetrating the panel part 21.

[0031] It should be understood that the number of the first mating part 21b and the second mating part 3a can be one or more. When the first mating part 21b and the second mating part 3a are set to multiple, the multiple first mating parts 21b are distributed at intervals on the panel part 21, and the multiple second mating parts 3a are distributed at intervals on the adhesive layer 3.

[0032] Specifically, in one embodiment, the first mating part 21b is a groove provided on the panel member 21, and the size of the groove is at least partially increased along the depth direction; the second mating part 3a is a protrusion that fits into the groove.

[0033] In this embodiment, the first mating part 21b is a groove formed in the panel. The groove increases in size at least partially along the depth direction. When the adhesive enters the groove and cures, the adhesive forms a protrusion that mates with the groove. The protrusion increases in size at least partially along the protrusion direction. An interlocking structure is formed between the protrusion and the groove structure, which can prevent the panel 21 from separating from the adhesive layer 3. It should be understood that, such as Figure 7 As shown, in this embodiment, a metal protrusion 1b can be further provided on the metal frame 1. The metal protrusion 1b is embedded in the groove of the panel piece 21, and the adhesive layer 3 fills the gap between the metal protrusion 1b and the groove, further enhancing the connection strength between the metal frame 1 and the panel piece 21.

[0034] Specifically, such as Figures 9 to 14 As shown, in another embodiment, the first mating part 21b is a protrusion provided on the panel member 21, and the size of the protrusion is increased at least partially along the protrusion direction; the second mating part 3a is a groove fitted onto the protrusion.

[0035] In this embodiment, the first mating part 21b is a protrusion provided on the panel 21. When adhesive is filled between the panel 21 and the metal frame 1, the adhesive can wrap the protrusion and form a groove that matches the shape of the protrusion. Since the size of the protrusion increases at least partially along the protrusion direction, the groove formed after the adhesive is cured can engage with the protrusion and form an inverted structure, which can restrict the panel 21 from separating from the adhesive layer 3.

[0036] Specifically, such as Figure 9 and Figure 10 As shown, in another embodiment, the protrusion is divided into a first protrusion 21b1 and a second protrusion 21b2. The dimensions of the first protrusion 21b1 and the second protrusion 21b2 are increased at least partially along the protrusion direction, and the height of the second protrusion 21b2 is higher than the height of the first protrusion 21b1. The metal frame 1 is provided with a receiving groove relative to the second protrusion 21b2, and the metal frame 1 is sleeved on the second protrusion 21b2 through the receiving groove. The adhesive layer 3 is also provided in the gap between the second protrusion 21b2 and the receiving groove.

[0037] In this embodiment, based on setting the first mating part 21b as a protrusion, the protrusion is divided into a first protrusion 21b1 and a second protrusion 21b2. The height of the second protrusion 21b2 is higher than that of the first protrusion 21b1, and it can be embedded in the corresponding receiving groove of the metal skeleton 1. After the adhesive is injected, the adhesive covers the first protrusion 21b1 and the second protrusion 21b2, forming an inverted structure with the first protrusion 21b1 and the second protrusion 21b2 respectively, and realizing the connection between the second protrusion 21b2 and the metal skeleton 1, further enhancing the structural strength between the panel part 21 and the metal skeleton 1.

[0038] It should be understood that the height of the first protrusion 21b1 can be 0.5cm to 2cm, and the taper can be 5 to 10°.

[0039] To further enhance the bonding strength between panel 21 and adhesive layer 3, therefore, as follows Figure 4 , Figure 5 and Figure 6 As shown, in one embodiment, an annular cavity 21c with an open end is formed on one side of the panel 21. The axis of the annular cavity 21c is parallel to the axis of the through hole 21a. At least one annular groove 21d is formed on the circumferential inner wall of the annular cavity 21c. The metal skeleton 1 is at least partially embedded in the annular cavity 21c. The adhesive layer 3 is also disposed in the annular groove 21d.

[0040] In this embodiment, by providing an annular cavity 21c in the panel component 21, when the adhesive fills the annular cavity 21c, it simultaneously connects the bottom and peripheral wall of the annular cavity 21c, increasing the connection area between the adhesive layer 3 and the panel component 21 and enhancing the structural strength between the adhesive layer 3 and the panel component 21. Furthermore, an annular groove 21d is provided in the peripheral wall of the annular cavity 21c. When the adhesive fills the annular cavity 21c, the adhesive enters the annular groove 21d. The cured adhesive layer 3, by cooperating with the annular groove 21d, can restrict the adhesive layer 3 from detaching from the panel component 21 along the opening direction of the annular cavity 21c.

[0041] To position the panel 21 and the hollow shaft 22, for this purpose, such as Figure 1 and Figure 12 As shown, in one embodiment, the panel 21 is provided with a recessed stop 21e; ​​the hollow shaft 22 is inserted into the recessed stop 21e and is sealed to the inner wall of the recessed stop 21e.

[0042] In this embodiment, by providing a recessed stop 21e on the panel 21, and inserting the hollow shaft 22 into the recessed stop 21e, the end of the hollow shaft 22 can seal and fit against the inner wall of the recessed stop 21e. This can prevent the adhesive from flowing through the gap between the hollow shaft 22 and the recessed stop 21e during the adhesive filling process. At the same time, the inner wall of the recessed stop 21e can position the axial position of the hollow shaft 22.

[0043] Since the panel 21 may have grooves or protrusions, and the panel 21 is made of ceramic, it is difficult to process the panel 21 using traditional processes. Therefore, in one embodiment, the panel 21 is a 3D printed structure.

[0044] In this embodiment, the panel part 21 is set as a 3D printed structure, and the panel part 21 is produced by 3D printing, which can process ceramic panel parts 21 with complex structures and shapes.

[0045] In order to allow adhesive to be injected into the gap between the hollow shaft 22 and the metal frame 1, for this purpose, as follows: Figure 4 As shown, in one embodiment, the metal frame 1 has a grouting hole 1a; the gap between the panel 21 and the metal frame 1 is connected to the grouting hole 1a; the gap between the hollow shaft 22 and the metal frame 1 is connected to the grouting hole 1a.

[0046] In this embodiment, by opening a grouting hole 1a on the metal frame 1, the adhesive can enter the gap between the metal frame 1, the panel 21, and the hollow shaft 22 through the grouting hole 1a. After the injected adhesive is cured, it forms an adhesive layer 3.

[0047] It should be understood that before injecting the adhesive, the gaps between the metal frame 1 and the panel 21 that may have leaked adhesive are sealed. Sealing methods include applying sealant, applying a sealing film, etc.

[0048] Secondly, this utility model also provides a fluid conveying device, including the aforementioned protective plate structure.

[0049] It should be understood that the fluid conveying device also includes existing structures such as impellers (not shown in the figure) and volutes (not shown in the figure), which are not discussed in detail in this application.

[0050] 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 protective plate structure, characterized in that, include: Metal frame; A guard plate assembly includes a panel and a hollow shaft. The panel is disposed on one side of the metal frame and has a through hole. The hollow shaft is coaxially disposed with the through hole and has a boss structure that mates with the metal frame. The boss structure restricts the movement of the hollow shaft in the direction close to the panel. An adhesive layer is disposed between the metal frame and the panel component, and is fitted with the panel component using a concave-convex structure. The adhesive layer is also disposed between the hollow shaft and the metal frame.

2. The protective plate structure according to claim 1, characterized in that, The panel component has a first mating portion, and the adhesive layer has a second mating portion that mates with the first mating portion. One of the first mating portion and the second mating portion is a protrusion, and the other is a groove. The protrusion has at least a partial increase in size along the protrusion direction.

3. The protective plate structure according to claim 2, characterized in that, The first mating part is a groove provided in the panel member, and the size of the groove is increased at least partially along the depth direction; The second mating part is a protrusion that fits into the groove.

4. The protective plate structure according to claim 2, characterized in that, The first mating part is a protrusion provided on the panel member, and the size of the protrusion is increased at least partially along the protrusion direction; The second mating part is fitted into the groove of the protrusion.

5. The protective plate structure according to claim 4, characterized in that, The protrusion is divided into a first protrusion and a second protrusion. The dimensions of the first protrusion and the second protrusion are increased at least partially along the protrusion direction, and the height of the second protrusion is greater than the height of the first protrusion. The metal frame is provided with a receiving groove relative to the second protrusion, and the metal frame is sleeved on the second protrusion through the receiving groove; The adhesive layer is also disposed in the gap between the second protrusion and the receiving groove.

6. The protective plate structure according to any one of claims 2 to 5, characterized in that, One side of the panel is formed with an annular cavity that is open at one end. The axis of the annular cavity is parallel to the axis of the through hole. At least one annular groove is formed on the circumferential inner wall of the annular cavity. The metal skeleton is at least partially embedded in the annular cavity; The adhesive layer is also disposed in the annular groove.

7. The protective plate structure according to claim 1, characterized in that, The panel component is provided with a recessed stop; The hollow shaft is inserted into the recessed stop and is sealed to the inner wall of the recessed stop.

8. The protective plate structure according to claim 1, characterized in that, The panel component is a 3D printed structure.

9. The protective plate structure according to claim 1, characterized in that, The metal frame is provided with grouting holes; The gap between the panel component and the metal frame is connected to the grouting hole; The gap between the hollow shaft and the metal frame is connected to the grouting hole.

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

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