Sand uniformizing device for improving raining type sand spraying effect

Abstract

The utility model relates to a sand uniformizing device for improving the raining type sand spraying effect, which belongs to the field of casting and comprises a main frame arranged at the sand outlet end of a sand spraying machine, first kidney-shaped holes perpendicular to the ground are symmetrically formed in the inner walls of the two opposite sides of the main frame, and at least two layers of sand uniformizing nets are arranged on the inner side of the main frame from top to bottom. Adjusting assemblies are symmetrically arranged at the two ends, facing the first kidney-shaped hole, of the sand uniformizing net and installed in the first kidney-shaped hole. The sand uniformizing device has the beneficial effects that sand grains falling in a bundling state are uniformly dispersed and uniformly distributed free falling bodies through the double-layer sand uniformizing effect of the sand uniformizing device, and the sand grains are uniformly distributed in a unit space; the impact force is relatively small, cluster impact is eliminated, sand grains can be evenly attached to the slurry layer on the surface of the module, the bonding depth of the slurry layer and the sand grains is reasonable, and the overall air permeability of the module shell can be improved.

Description

Technical Field

[0001] The utility model relates to the field of casting, and particularly to a sand homogenizer for improving the sand spraying effect of a rain-type sand sprayer. Background Art

[0002] The working environments of turbine blades of aero-engines and gas turbines are extremely harsh, and extremely high requirements are imposed on the product precision and quality. At present, turbine blades for aero-engines and gas turbines are generally manufactured by precision casting processes. The precision casting processes include multiple processes such as wax pattern manufacturing, wax pattern tree building, slurry dipping, shell mold manufacturing, wax melting, smelting and pouring, and shell mold cleaning.

[0003] Among them, as a front-end process for manufacturing turbine blades, the quality of shell mold manufacturing is inseparable from the quality of turbine blades. The sand spraying effect after the module is dipped in slurry during the shell making process directly affects the shell making quality. In the prior art, sand grains flow out from the misaligned holes of a rain-type sand sprayer and fall downward in a bundled state. The problems are as follows: during this process, the sand quantity cannot achieve completely uniform falling. Secondly, due to the bundled falling, the impact of the sand material on the slurry layer on the surface of the module is too large, seriously affecting the shell making quality. In addition, during this process, the entrainment effect of the sand material bundle makes it difficult to remove dust, further deepening the fluctuations in the shell making process, and seriously affecting the low-temperature strength, high-temperature strength, and air permeability of the mold shell. Summary of the Utility Model

[0004] The technical problem to be solved by the utility model is to provide a sand homogenizer that can improve the sand spraying effect and the quality of the shell mold.

[0005] The technical solution for the utility model to solve the above technical problem is as follows: a sand homogenizer for improving the rain-type sand spraying effect includes a main frame installed at the sand outlet end of the sand sprayer. Symmetrically arranged on the inner walls of the two opposite sides of the main frame are first waist-shaped holes perpendicular to the ground. At least two layers of sand homogenizing meshes are arranged inside the main frame from top to bottom. At both ends of the sand homogenizing mesh facing the first waist-shaped hole are symmetrically arranged adjusting components, and the adjusting components are installed in the first waist-shaped holes.

[0006] The beneficial effect of the utility model is that: through the double-layer sand homogenizing effect of the sand homogenizer, the sand grains falling in a bundled state are presented as uniformly dispersed and evenly distributed free-falling bodies, and the sand grains are evenly distributed in the unit space; the impact force is relatively small and the bundled impact is eliminated, so that the sand grains can be evenly attached to the slurry layer on the surface of the module, the bonding depth between the slurry layer and the sand grains is reasonable, and the overall air permeability of the mold shell can be improved.

[0007] Secondly, after eliminating the bundling effect of the sand grains, the sand grains are evenly distributed, and the dust entrained in the sand grains can quickly diffuse into the space and can be quickly removed by the dust removal system, thereby optimizing the bonding effect between the slurry layer and the sand grains.

[0008] Secondly, it has a crushing effect on the sand mass formed by the combination of semi-dry slurry and sand grains generated during the continuous production process, reduces the generation of slag in the sand spraying machine shell, enables the sand spraying to remain in an excellent state for a long time, and reduces the probability of blockage at the sand spraying port.

[0009] Finally, the height between the multi-layer sand leveling meshes can be freely adjusted, and the sand leveling effect can be set according to different slurries.

[0010] Based on the above technical solutions, the present utility model can also be improved as follows.

[0011] Furthermore, each of the adjusting components includes an adjusting frame, and the adjusting frame is fixedly installed on the first kidney-shaped hole through bolts.

[0012] The beneficial effect of adopting the above further solution is that the sand leveling mesh is fixed and the height is adjusted through the adjusting frame, and the fixation is more stable.

[0013] Furthermore, horizontal through grooves are formed on each of the adjusting frames, and both ends of the sand leveling mesh are slidably located in the through grooves of the two adjusting frames.

[0014] The beneficial effect of adopting the above further solution is that it is convenient to slidably install the sand leveling mesh, which is fast and labor-saving.

[0015] Furthermore, the adjusting component further includes a pressing plate, the pressing plate is located above the through groove, a plurality of second kidney-shaped holes perpendicular to the through groove are formed on the side wall of the adjusting frame, a lug is fixedly connected to the side wall of the pressing plate, and the lug is fixedly installed on the second kidney-shaped hole through bolts.

[0016] The beneficial effect of adopting the above further solution is that the pressing plate presses the sand leveling mesh to prevent the sand leveling mesh from shaking during use, and the pressing plate can also be adjusted up and down to be suitable for sand leveling meshes of different thicknesses.

[0017] Furthermore, a rotating seat is fixedly connected to the outer side wall of the main frame, and the rotating seat is rotationally connected to the sand spraying machine through a rotating shaft.

[0018] The beneficial effect of adopting the above further solution is that it is convenient to install and fix the main frame, and the main frame can be adjusted at any angle.

[0019] Furthermore, a suspension hole is formed on the outer wall of the other side of the main frame away from the rotating seat.

[0020] The beneficial effect of adopting the above further solution is that the suspension steel cable is passed through the suspension hole to cooperate with the rotating seat to adjust the angle of the main frame.

[0021] Furthermore, the sand leveling mesh is a hard cold-rolled steel wire mesh or a stainless steel mesh.

[0022] The beneficial effects of adopting the above further scheme are as follows: The wire mesh has strong physical properties, ensuring a long service life.

[0023] Furthermore, a sealing block is fixedly connected to the edge of the sand leveling mesh located in the through groove.

[0024] The beneficial effects of adopting the above further scheme are as follows: The edge of the sand leveling mesh is sealed, facilitating transportation and sliding in the through groove.

[0025] Furthermore, the mesh number of the sand leveling mesh is below 20 meshes.

[0026] The beneficial effects of adopting the above further scheme are as follows: It is selected according to the diameter of the sand grains used.

[0027] Furthermore, the distance between the two layers of the sand leveling mesh is 50 mm to 130 mm.

[0028] The beneficial effects of adopting the above further scheme are as follows: It is selected according to the diameter of the sand grains used. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a schematic diagram of the main frame of the present utility model.

[0030] Figure 2 It is a schematic diagram of the first kidney-shaped hole of the present utility model.

[0031] Figure 3 It is a schematic diagram of the adjusting frame of the present utility model.

[0032] Figure 4 is Figure 3 the enlarged view of part A of

[0033] Figure 5 It is a schematic diagram of the sand leveling mesh of the present utility model.

[0034] In the drawings, the list of components represented by each reference numeral is as follows:

[0035] 1, main frame; 2, first kidney-shaped hole; 3, sand leveling mesh; 4, adjusting frame; 5, through groove; 6, pressing plate; 7, lug; 8, second kidney-shaped hole; 9, rotating seat; 10, suspension hole; 11, sealing block. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0036] The principles and features of the present utility model will be described below with reference to the accompanying drawings. The examples given are only for explaining the present utility model and are not intended to limit the scope of the present utility model.

[0037] Embodiment 1

[0038] As Figures 1 to 5As shown in the figure, a sand homogenizer for improving the effect of rain-type sand spraying includes a main frame 1 installed at the sand outlet end of the sand spraying machine. Symmetrically arranged on the inner walls of the two opposite sides of the main frame 1 are first kidney-shaped holes 2 perpendicular to the ground. At least two layers of sand homogenizing nets 3 are arranged inside the main frame 1 from top to bottom. At both ends of the sand homogenizing net 3 facing the first kidney-shaped hole 2, adjusting components are symmetrically arranged, and the adjusting components are installed in the first kidney-shaped hole 2.

[0039] The beneficial effects of this embodiment are as follows: Through the double-layer sand homogenizing effect of the sand homogenizer, the sand grains falling in a bundled state are presented as uniformly dispersed and evenly distributed free fall, and the sand grains are evenly distributed in the unit space; the impact force is relatively small and the bundled impact is eliminated, so that the sand grains can be evenly attached to the slurry layer on the surface of the module, the bonding depth between the slurry layer and the sand grains is reasonable, and the overall air permeability of the mold shell can be improved.

[0040] Secondly, after eliminating the bundling effect of the sand grains, the sand grains are evenly distributed, and the dust carried in the sand grains can quickly diffuse into the space and can be quickly removed by the dust removal system, thereby optimizing the bonding effect between the slurry layer and the sand grains.

[0041] Secondly, it has a crushing effect on the sand masses formed by the combination of semi-dry slurry and sand grains generated during the continuous production process, reduces the generation of slag in the sand spraying machine shell, enables the sand spraying to be in an excellent state for a long time, and reduces the probability of blockage at the sand spraying port.

[0042] Finally, the height between the multiple layers of sand homogenizing nets 3 can be freely adjusted, and the sand homogenizing effect can be set according to different slurries.

[0043] Specifically, after the surface of the precision casting module is coated with slurry, it needs to be placed under the sand spraying machine. The sand grains flow out and combine with the slurry layer to form a mold shell, and then the mold shell is used for casting;

[0044] There are multiple small holes at the bottom of the sand spraying machine, and the sand grains flow out of the holes to form a bundle. The impact will damage the slurry layer, and the sand grains are not evenly distributed. In this embodiment, the bundled sand grains falling are blocked and dispersed by the multiple layers of sand homogenizing nets 3 to form a more uniform sand grain distribution, and the quality of the mold shell is better.

[0045] Embodiment 2

[0046] As Figures 2 to 4 shown, preferably, on the basis of Embodiment 1, each of the adjusting components includes an adjusting frame 4, and the adjusting frame 4 is fixedly installed on the first kidney-shaped hole 2 through bolts.

[0047] The beneficial effect of adopting the preferred scheme in the above embodiment is that the sand homogenizing net 3 is fixed and the height is adjusted through the adjusting frame 4, and the fixing is more stable.

[0048] Preferably, horizontal through slots 5 are formed in the adjusting frames 4, and both ends of the sand leveling screen 3 are slidably located in the through slots 5 of the two adjusting frames 4.

[0049] The beneficial effect of adopting the preferred solution in the above embodiment is: it is convenient to slidably install the sand leveling screen 3, which is fast and labor-saving.

[0050] Preferably, the adjusting assembly further includes a pressing plate 6, the pressing plate 6 is located above the through slot 5, a plurality of second kidney-shaped holes 8 perpendicular to the through slot 5 are formed in the side wall of the adjusting frame 4, a lug 7 is fixedly connected to the side wall of the pressing plate 6, and the lug 7 is fixedly installed in the second kidney-shaped hole 8 through a bolt.

[0051] The beneficial effect of adopting the preferred solution in the above embodiment is: the pressing plate 6 presses the sand leveling screen 3 to prevent the sand leveling screen 3 from shaking during use. The pressing plate 6 can also be adjusted up and down to be suitable for sand leveling screens 3 with different thicknesses.

[0052] Specifically, as Figure 4 shown, the adjusting frame 4 is a horizontally arranged strip shape with an L-shaped cross section. The through slot 5 is formed in the top surface of the short side of the L-shaped adjusting frame 4. The pressing plate 6 is installed on the long side side wall of the L-shaped adjusting frame 4, and the pressing plate 6 presses the edge of the sand leveling screen 3 from top to bottom.

[0053] Embodiment 3

[0054] As Figures 1 to 2 shown, preferably, on the basis of Embodiments 1-2, a rotating seat 9 is fixedly connected to the outer side wall of the main frame 1, and the rotating seat 9 is rotationally connected to the sand spraying machine through a rotating shaft.

[0055] The beneficial effect of adopting the preferred solution in the above embodiment is: it is convenient to install and fix the main frame 1, and the main frame 1 can be adjusted at any angle.

[0056] Preferably, a suspension hole 10 is formed in the outer wall of the other side of the main frame 1 away from the rotating seat 9.

[0057] The beneficial effect of adopting the preferred solution in the above embodiment is: the suspension cable is threaded through the suspension hole 10 to cooperate with the rotating seat 9 to adjust the angle of the main frame 1.

[0058] Specifically, one end of the main frame 1 is rotatably installed under the sand spraying machine, the axis of the rotating shaft is parallel to the ground, the main frame 1 can adjust its angle around the rotating shaft by itself, which is suitable for different sand leveling requirements. A suspension cable is also arranged under the sand spraying machine, and the suspension cable is threaded through the suspension hole 10 to lift the main frame 1, and the angle of the main frame 1 is changed by retracting and releasing the suspension cable;

[0059] When the sand leveling screen 3 needs to be cleaned, the suspension cable is lowered to make the sand leveling screen 3 inclined at 45 degrees. The staff uses tools to strike the sand leveling screen 3 and then pulls it up again after cleaning.

[0060] As an alternative technical solution of this embodiment, the suspension cable can also be cancelled, and a damping ring or a bolt is installed on the rotating shaft to fix the rotating shaft after it rotates to a certain angle.

[0061] Embodiment 4

[0062] As Figure 5 shown, preferably, on the basis of Embodiments 1-3, the sand leveling screen 3 is a hard cold-rolled steel wire mesh or a stainless steel mesh.

[0063] The beneficial effect of adopting the preferred solution in the above embodiment is that the steel wire mesh has strong physical properties and ensures a long service life.

[0064] Preferably, a sealing block 11 is fixedly connected to the edge of the sand leveling screen 3 located in the through groove 5.

[0065] The beneficial effect of adopting the preferred solution in the above embodiment is that the edge of the sand leveling screen 3 is sealed, which is convenient for transportation and sliding in the through groove 5.

[0066] Preferably, the mesh number of the sand leveling screen 3 is below 20 meshes.

[0067] The beneficial effect of adopting the preferred solution in the above embodiment is that it is selected according to the diameter of the sand grains used.

[0068] Preferably, the distance between two layers of the sand leveling screen 3 is 50 mm to 130 mm.

[0069] The beneficial effect of adopting the preferred solution in the above embodiment is that it is selected according to the diameter of the sand grains used.

[0070] Specifically, the sealing block 11 is formed by pressing sheet metal and is fixed on the edge of the sand leveling screen 3. The cross section of the sealing block 11 is L-shaped, which can better cooperate with the through groove 5 for sliding and fixing;

[0071] There are three production specifications for sand spraying. According to the sand spraying specifications, the sand leveling screen 3 is respectively selected as 12 meshes to 20 meshes, 8 meshes to 10 meshes, and ≤6 meshes. The larger the mesh number, the smaller the sieve hole size;

[0072] According to the selected mesh number, the distance between adjacent two layers of the sand leveling screen 3 is 50 mm to 80 mm, 60 mm to 100 mm, and 80 mm to 130 mm in sequence. The larger the mesh number, the closer the distance.

[0073] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by terms such as "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present utility model.

[0074] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In the description of the present utility model, the meaning of "a plurality of" is at least two, such as two, three, etc., unless otherwise specifically and clearly defined.

[0075] In the present utility model, unless otherwise clearly specified and defined, terms such as "mounted", "connected", "connected to", "fixed" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two elements or the interaction relationship between two elements, unless otherwise clearly defined. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0076] In the present utility model, unless otherwise clearly specified and defined, the first feature being "on" or "under" the second feature may be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature may be that the first feature is directly above or obliquely above the second feature, or merely indicates that the first feature has a higher horizontal height than the second feature. The first feature being "under", "beneath" and "underneath" the second feature may be that the first feature is directly below or obliquely below the second feature, or merely indicates that the first feature has a lower horizontal height than the second feature.

[0077] In the description of this specification, the descriptions referring to terms such as "one embodiment", "some embodiments", "examples", "specific examples", or "some examples", etc. mean that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0078] Although the embodiments of the present utility model have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as limiting the present utility model. Those of ordinary skill in the art can make changes, modifications, substitutions, and variations to the above embodiments within the scope of the present utility model.

Claims

1. A sand leveling device for improving the effect of rain-type sand spraying, characterized in that It includes a main frame (1) installed at the sand discharging end of the sand spraying machine. On the symmetric inner walls of the opposite sides of the main frame (1), first kidney-shaped holes (2) perpendicular to the ground are symmetrically opened. At least two layers of sand leveling meshes (3) are arranged inside the main frame (1) from top to bottom. At both ends of the sand leveling mesh (3) facing the first kidney-shaped hole (2), adjusting components are symmetrically arranged, and the adjusting components are installed in the first kidney-shaped hole (2).

2. The sand leveling device for improving the sand spraying effect of the rain spraying type according to claim 1, wherein, Each of the adjusting components includes an adjusting frame (4), and the adjusting frame (4) is fixedly installed on the first kidney-shaped hole (2) by bolts.

3. The sand leveling device for improving the effect of rain-type sand spraying according to claim 2, characterized in that, Horizontal through grooves (5) are opened on each of the adjusting frames (4), and both ends of the sand leveling mesh (3) are slidably located in the through grooves (5) of the two adjusting frames (4).

4. The sand leveling device for improving the effect of rain-type sand spraying according to claim 3, characterized in that, The adjusting component further includes a pressing plate (6). The pressing plate (6) is located above the through groove (5). A plurality of second kidney-shaped holes (8) perpendicular to the through groove (5) are opened on the side wall of the adjusting frame (4). A lug (7) is fixedly connected to the side wall of the pressing plate (6), and the lug (7) is fixedly installed on the second kidney-shaped hole (8) by bolts.

5. The sand leveling device for improving the sand spraying effect of the rain spraying type according to claim 1, characterized in that A rotating seat (9) is fixedly connected to the outer side wall of the main frame (1), and the rotating seat (9) is rotatably connected to the sand spraying machine through a rotating shaft.

6. The sand leveling device for improving the effect of rain-type sand spraying according to claim 5, characterized in that A suspension hole (10) is opened on the outer wall of the other side of the main frame (1) away from the rotating seat (9).

7. The sand leveling device for improving the effect of rain-type sand spraying according to claim 1, characterized in that, The sand leveling mesh (3) is a hard cold-rolled steel wire mesh or a stainless steel mesh.

8. The sand leveling device for improving the effect of rain-type sand spraying according to claim 3, characterized in that, Sealing blocks (11) are fixedly connected to the edges of the sand leveling mesh (3) located in the through grooves (5).

9. A sand leveling device for improving the effect of sand spraying in a rain-like manner according to any one of claims 1 to 8, characterized in that, The mesh number of the sand leveling mesh (3) is below 20 meshes.

10. A sand leveling device for improving the effect of rain-type sand spraying according to any one of claims 1 to 8, characterized in that The distance between the two layers of sand leveling meshes (3) is 50 mm to 130 mm.

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