Brushing equipment

Abstract

The utility model relates to the field of sand core painting, and discloses painting equipment which comprises a painting pool, a circulating system and a lifting appliance located above the painting pool, one end of the circulating system is connected with the bottom of the painting pool, the other end of the circulating system is connected with the upper portion of the painting pool, the circulating system comprises a circulating pump (1), and the circulating pump (1) is connected with the lifting appliance. Under the action of the circulating pump (1), paint in the brushing pool is pumped out from the bottom and flows in from the upper part; the circulating system further comprises an inflow pipeline (21), one end of the inflow pipeline (21) is connected with an outlet of the circulating pump (1), the other end of the inflow pipeline (21) is connected with the upper portion of the brushing pool, an included angle theta is formed between the axis of the inflow pipeline (21) and the axial direction of the brushing pool, and theta is larger than or equal to 45 degrees and smaller than or equal to 90 degrees. According to the coating equipment, the surface of the sand core is coated by adopting a dip-coating method, so that the coating can be fully utilized, and the coating equipment is simple in structure and low in use cost.

Description

Technical Field

[0001] The utility model relates to the field of sand core coating, in particular to a coating device. Background Art

[0002] Cast pipe socket casting usually requires the use of sand cores to form a hollow structure or a specific geometric shape inside the pipe, such as forming an orifice, branch or other special shape inside the pipe.

[0003] Sand cores are usually made of high temperature resistant sand materials, such as quartz sand, gypsum sand, debonded sand, etc. These materials have the characteristics of high temperature resistance and good pressure resistance, and can maintain stable shape during the casting process, ensuring that the quality and geometric dimensions of the final casting meet the requirements.

[0004] Before using the sand core, the surface of the sand core needs to be sprayed. By spraying a layer of paint on the surface of the sand core, on the one hand, the wear resistance and high temperature resistance of the sand core surface can be increased after spraying the paint on the sand core surface, and the surface sand core can be prevented from cracking or deforming during the casting process; at the same time, the sprayed paint can improve the smoothness of the sand core surface, which is conducive to maintaining the accurate size and surface quality of the casting; at the same time, the paint between the casting and the sand core can prevent adhesion, which helps to smoothly demold and improve the yield rate.

[0005] At present, the sand cores used for casting the socket of cast pipes are painted on the casting surface by operators using spray equipment. The spray equipment atomizes the paint by high pressure and then separates the atomized paint. However, during the spraying process, the atomized paint cannot be completely adhered to the surface of the sand core, and some of the paint will be scattered in the environment, causing certain waste.

[0006] Moreover, spraying equipment has very high requirements on the purity of the paint. If the paint contains impurities, it will cause wear and tear on the equipment, and even cause equipment failure. However, the purity of the paint is often not effectively guaranteed. Therefore, when using spraying equipment to paint the surface of the sand core, not only is there a waste of paint, but the cost of using the equipment is also very high. Utility Model Content

[0007] In order to overcome the problems of paint waste and high equipment cost when spraying paint in the prior art, the utility model provides a painting device, which uses a dipping method to paint the surface of the sand core, can achieve full utilization of the paint, and has a simple structure and low cost.

[0008] In order to achieve the above-mentioned purpose, the utility model provides a painting equipment, which includes a painting pool, a circulation system and a hanger located above the painting pool, one end of the circulation system is connected to the bottom of the painting pool, and the other end is connected to the upper part of the painting pool, and the circulation system includes a circulation pump. Under the action of the circulation pump, the paint in the painting pool is pumped out from the bottom and flows into from the upper part;

[0009] The circulation system also includes an inflow pipeline, one end of which is connected to the outlet of the circulation pump, and the other end is connected to the upper part of the painting pool. The axis of the inflow pipeline is set at an angle θ with the axial direction of the painting pool, 45°≤θ≤90°.

[0010] Preferably, the coating pool comprises an upper dipping pool and a lower confluence pool, the dipping pool is configured to be cylindrical, the confluence pool is configured to be conical, and the confluence pool is coaxially designed with the dipping pool.

[0011] Preferably, a confluence outlet is provided at the bottom of the conical confluence pool, and the inlet of the circulation pump is connected to the confluence outlet.

[0012] Preferably, a plurality of the inflow pipes are provided, and the plurality of the inflow pipes extend into the dipping tank, and the lengths of the plurality of the inflow pipes extending into the dipping tank are different.

[0013] Preferably, the outlet of the inflow pipeline is arranged as an oblique section of the inflow pipeline.

[0014] Preferably, the heights of the plurality of inflow pipeline outlets are different.

[0015] Preferably, the hanger comprises a track and a clamp located below the track and capable of moving along the track, wherein the clamp is used to clamp the sand core.

[0016] Preferably, the track is provided with three stop positions: a loading stop position, a dipping stop position and an unloading stop position.

[0017] Preferably, the hanger is provided with a lifting device at the dipping stop position.

[0018] According to the above technical solution, the hoist carries the sand core and immerses it into the painting pool, which is filled with paint sufficient to immerse the sand core. After the sand core is immersed for a period of time, a layer of paint is applied to the surface of the sand core. At this time, the hoist pulls the sand core out of the painting pool and sends it to the drying equipment after being slightly dried.

[0019] In order to prevent the paint in the painting pool from settling and stratifying after being left for a long time, the painting equipment is also provided with a circulation system. The inlet pipe of the circulation system is connected to the upper part of the painting pool. Under the action of the circulation pump, the paint in the painting pool is drawn out from the bottom of the painting pool and flows into the painting pool from the upper part. In this way, the paint in the painting pool is circulated outside the pool.

[0020] Since the painting pool needs to accommodate the entire sand core, and the size of the sand core is usually very large, the volume of the painting pool is also very large. In order to achieve the immersion effect on the sand core 10, the paint in the painting pool must have a certain depth. Therefore, the painting pool is filled with a large amount of paint. For these large amounts of paint, it is impossible to reliably circulate all the paint in the painting pool only through the circulation system. Therefore, the present application is provided with an inflow pipeline. Under the action of the circulation pump, the inflow pipeline continuously sprays paint with a certain initial velocity into the painting pool. Under the action of these paints with initial velocities, the paint in the painting pool will follow the paint sprayed by the circulation pump 1 to make a rotational motion, and cooperate with the suction effect of the circulation pump on the paint, so that the paint generates a vortex in the painting pool, thereby achieving the effect of mixing and stirring the paint in the painting pool, which can effectively avoid the precipitation and stratification of the paint.

[0021] Since the circulation pump will extract the paint from the center of the coating pool, the axial angle between the inlet pipe and the dipping pool is set to 45°~90° so that the paint sprayed by the circulation pump can avoid flowing to the center of the dipping pool, but spray more paint to the position close to the inner wall of the dipping pool, so that the paint sprayed from the inlet pipe can push the paint away from the center of the dipping pool to rotate, so that all the paint in the coating pool can be pushed to move, thereby allowing all the paint in the coating pool to be mixed and stirred. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of a painting device;

[0023] Figure 2 It is a top view of a painting pool;

[0024] Figure 3a-3b It is a layout diagram of the inflow pipe of a painting pool.

[0025] Description of Reference Numerals

[0026] 1 Circulation pump 21 Inflow pipeline

[0027] 31 Dipping pool 32 Converging pool

[0028] 33 confluence outlet 22 outflow pipeline

[0029] 41 fixture 10 sand core DETAILED DESCRIPTION

[0030] In the present utility model, unless otherwise specified, directional words such as "above, upper, bottom, lower, inside" generally refer to the orientation of the term in normal use, or are common names understood by those skilled in the art, and should not be regarded as limitations on the term.

[0031] See also Figure 1 The painting equipment includes a painting pool, a circulation system and a hanger located above the painting pool, one end of the circulation system is connected to the bottom of the painting pool, and the other end is connected to the upper part of the painting pool. The circulation system includes a circulation pump 1. Under the action of the circulation pump 1, the paint in the painting pool is pumped out from the bottom and flows into the upper part;

[0032] The circulation system also includes an inflow pipe 21, one end of which is connected to the outlet of the circulation pump 1, and the other end is connected to the upper part of the painting pool. The axis of the inflow pipe 21 and the axial direction of the painting pool are set at an angle θ, 45°≤θ≤90°.

[0033] Through the implementation of the above technical solution, the sling carries the sand core 10 and immerses the sand core 10 into the painting pool. The painting pool is filled with paint sufficient to immerse the sand core 10. After the sand core 10 is immersed for a period of time, a layer of paint is applied to the surface of the sand core 10. At this time, the sling pulls the sand core 10 out of the painting pool and sends it to the drying equipment after being slightly dried.

[0034] In order to prevent the paint in the painting pool from settling and stratifying after being left for a long time, the painting equipment is also provided with a circulation system. The inlet pipe 21 of the circulation system is connected to the upper part of the painting pool. Under the action of the circulation pump 1, the paint in the painting pool is drawn out from the bottom of the painting pool and flows into the painting pool from the upper part of the painting pool. In this way, the paint in the painting pool is circulated outside the pool.

[0035] Since the painting pool needs to accommodate the entire sand core 10, and the size of the sand core 10 is usually very large, the volume of the painting pool is also very large. In order to achieve the immersion of the sand core 10, the paint in the painting pool must have a certain depth. Therefore, the painting pool is filled with a large amount of paint. For these large amounts of paint, it is impossible to reliably circulate all the paint in the painting pool only through the circulation system. Therefore, the present application is provided with an inflow pipe 21. Under the action of the circulation pump 1, the inflow pipe 21 continuously sprays paint with a certain initial velocity into the painting pool. Under the action of these paints with initial velocities, the paint in the painting pool will follow the paint sprayed by the circulation pump 1 to rotate, and cooperate with the suction effect of the circulation pump 1 on the paint, so that the paint generates a vortex in the painting pool, thereby achieving the effect of mixing and stirring the paint in the painting pool, which can effectively avoid the precipitation and stratification of the paint.

[0036] Since the circulation pump 1 will extract the paint from the center of the coating pool, the axial angle between the inlet pipe 21 and the dipping pool 31 is set to 45°~90°, so that the paint sprayed by the circulation pump 1 can avoid flowing to the center of the dipping pool 31, but spray more paint to a position close to the inner wall of the dipping pool 31, so that the paint sprayed from the inlet pipe 21 can push more paint away from the center of the dipping pool 31 to rotate, so that all the paint in the coating pool can be pushed to move, thereby allowing all the paint in the coating pool to be mixed and stirred.

[0037] When the paint in the painting pool rotates, after the sand core 10 is immersed in the painting pool, there will be a certain relative movement between the paint and the surface of the sand core 10, which is conducive to expelling bubbles attached to the surface of the sand core 10, so that the quality of the coating formed by dip coating is better.

[0038] In this embodiment, preferably, the coating pool includes an upper dipping pool 31 and a lower confluence pool 32 , the dipping pool 31 is configured to be cylindrical, the confluence pool 32 is configured to be conical, and the confluence pool 32 is coaxially designed with the dipping pool 31 .

[0039] The dipping pool 31 is set to be cylindrical to meet the dipping requirements of the large diameter sand core 10, and the collection pool 32 is set at the lower part of the dipping pool 31. Under the action of the circulating pump 1, the paint in the collection pool 32 can be effectively moved toward the bottom, and the conical convergence effect of the collection pool 32 can realize the collection of the paint in the dipping pool 31.

[0040] The circulating pump 1 can directly draw the paint in the confluence pool 32, so the paint in the confluence pool 32 can be mixed and stirred under the action of the circulating pump 1, thereby effectively avoiding the paint from settling and stratifying. Therefore, the inflow pipe 21 only needs to be connected to the upper dipping pool 31.

[0041] In this embodiment, preferably, a confluence outlet 33 is provided at the bottom of the conical confluence pool 32 , and the inlet of the circulation pump 1 is connected to the confluence outlet 33 .

[0042] The circulation pump 1 extracts the coating material in the confluence pool 32 through the confluence outlet 33 , and stirs the coating material in the confluence pool 32 through its suction action.

[0043] Preferably, the confluence outlet 33 is coaxially arranged with the confluence pool 32 , so that the suction effect of the circulation pump 1 can evenly cover all places in the confluence pool 32 .

[0044] In this embodiment, preferably, a plurality of inflow pipes 21 are provided, and the plurality of inflow pipes 21 extend into the dipping tank 31 , and the lengths of the plurality of inflow pipes 21 extending into the dipping tank 31 are different.

[0045] Since the diameter of the dipping pool 31 is usually set very large, the cross-sectional area of ​​the dipping pool 31 is also large, and the paint itself has a certain viscosity. If only one inflow pipe 21 is set, it may not be possible to drive the movement of the paint on the entire cross-section of the dipping pool 31. Therefore, multiple inflow pipes 21 are set, and the extension lengths of the multiple inflow pipes 21 are set to be different so that the paint sprayed from these inflow pipes 21 can drive the paint in the dipping pool 31 to move at different positions on the cross-section of the dipping pool 31, thereby achieving the effect of stirring all the paint in the dipping pool 31. At the same time, as the paint in the confluence pool 32 is extracted, the paint in the dipping pool 31 has a tendency to move downward while rotating circumferentially, thereby achieving a better stirring effect on the paint in the dipping pool 31.

[0046] In one embodiment, if Figure 2 As shown, a plurality of inflow pipes 21 are provided, and the plurality of inflow pipes 21 can be staggered along the circumference of the dipping pool 31, and the extension lengths of the inflow pipes 21 are different so as to push the coating at various positions of the cross section of the dipping pool 31. In this way, the coating in the entire dipping pool 31 rotates in the dipping pool 31, and finally forms a vortex with the downward movement component.

[0047] In this embodiment, preferably, the outlet of the inflow pipe 21 is configured as an oblique section of the inflow pipe 21 .

[0048] The inflow pipe 21 can provide the coating with an initial velocity to the dipping pool 31, and the coating is used to push the coating located near the inner wall of the confluence pool 32 to make circumferential motion. When the outlet of the inflow pipe 21 is set as an oblique section of the inflow pipe 21, the area of ​​the outlet is increased. When the flow rate of the circulating pump 1 remains unchanged, the speed of the coating flowing out can be reduced by increasing the outlet area, thereby avoiding the coating flowing out through the inflow pipe 21 from causing agitation and generating bubbles in the dipping pool 31, thereby affecting the dipping effect of the dipping pool 31 on the sand core.

[0049] On the other hand, the outlet of the inflow pipe 21 is set as an oblique section of the inflow pipe 21 so that the outlet can cover a larger range of the cross section of the dipping pool 31, thereby achieving a pushing effect on more coatings.

[0050] In this embodiment, preferably, the outlets of the plurality of inflow pipes 21 have different heights.

[0051] The different heights of the outlets of the multiple inflow pipes 21 can achieve the purpose of pushing the coating at different heights in the dipping pool 31, such as Figure 3aAs shown, the two inflow pipes 21 are staggered in the height direction, so that the two inflow pipes 21 can push the paint at different heights to make a circular motion. Preferably, the two inflow pipes 21 at different heights are set to have different extending lengths, so that the two inflow pipes 21 can simultaneously push the paint at different heights and the paint at different positions on the cross section.

[0052] The inflow pipe 21 located at the top can push the paint above the dipping pool 31 to rotate. Since the paint has viscosity inside, when the circulating pump 1 extracts the paint in the confluence pool 32, it will also produce a suction effect on the paint in the dipping pool 31. The paint in the dipping pool 31 has a tendency to move downward. However, as the height increases, the force of the circulating pump 1 on the paint decreases. Therefore, an inflow pipe 21 is set at a position close to the lower part of the dipping pool 31. The paint sprayed from the inflow pipe 21 can push the paint in the dipping pool 31 to rotate. With the tendency of the paint to move downward, the paint in the dipping pool 31 generates a vortex, and the paint at the center of the vortex is extracted by the circulating pump 1. Going upward along the inflow pipe 21, the viscosity of the paint hinders the formation of the vortex. Therefore, another inflow pipe 21 can be set at a position slightly higher than the inflow pipe 21, and the paint sprayed from the upper inflow pipe 21 pushes the paint above to rotate with the vortex, thereby achieving the effect of stirring the paint in the dipping pool 31.

[0053] Of course, multiple inflow pipes 21 can be set at different heights of the dipping pool 31 as needed to form an effective and stable vortex in the dipping pool 31, and under the action of the vortex, all the coatings in the dipping pool 31 can be stirred.

[0054] Preferably, the multiple inflow pipes 21 should be concentrated on one side of the dipping pool 31 as much as possible, so that the effective use space in the dipping pool 31 can be guaranteed, and the sand core is prevented from colliding with the inflow pipes 21 after being immersed in the dipping pool 31.

[0055] In one embodiment, the two inlet pipes 21 are distributed along the circumference of the dip coating pool 31, such as Figure 3b As shown; in another embodiment, the two inlet pipes 21 are located on the same busbar of the dipping pool 31, but the utility model is not limited to the above two embodiments. The inlet pipes 21 can be distributed in multiple circumferential directions or distributed along the same busbar. Similarly, the inlet pipes 21 can also be distributed in multiple height directions of the dipping pool 31, or more other distribution forms can be obtained through combination.

[0056] Since the outlet 33 is provided at the bottom center of the confluence pool 32, the paint near the center of the dipping pool 31 has a clear tendency to move downward under the action of the circulation pump 1, and this tendency to move downward decreases as the height of the paint increases. Therefore, a plurality of inflow pipes 21 need to be provided at the upper part of the dipping pool 31 to push the paint at the upper part of the dipping pool 31, assist the upper paint to follow the paint at the lower part of the dipping pool 31, and finally generate a vortex in the dipping pool 31.

[0057] The main function of the inflow pipe 21 located at the top is to push more paint to rotate. Therefore, the inflow pipe 21 located at the top can be set to have a larger outlet area, so as to obtain a pushing effect on a larger area of ​​paint by setting a larger outlet, while avoiding the agitation of the paint caused by excessive flow rate, avoiding the tumbling effect on the paint surface, and thus avoiding the generation of bubbles in the paint. The inflow pipe 21 located at the bottom needs to have a larger pushing speed to cooperate with the suction effect of the circulating pump 1 on the paint, so that the vortex motion in the dipping pool 31 can cover the entire cross-section of the dipping pool 31, thereby achieving effective stirring of the paint.

[0058] In this embodiment, preferably, the lifting device includes a track and a clamp 41 located below the track and capable of moving along the track, wherein the clamp 41 is used to clamp the sand core 10 .

[0059] The clamp 41 is used to clamp the sand core 10 and can realize the function of transporting the sand core 10. In the actual production process, after the sand core 10 is cast, it is hoisted to the hoist through the clamp 41 and transported to the top of the coating pool. After the dipping is completed, the hoist will also take the sand core 10 to the drying equipment so that the drying equipment can dry the sand core 10 that has been coated.

[0060] In this embodiment, preferably, the track is provided with three stop positions: a loading stop position, a dipping stop position and an unloading stop position.

[0061] The track is provided with corresponding stop positions, so that the clamp 41 can be accurately parked at the positions corresponding to these stop positions, so as to load, dip-coat or unload the sand core 10 to the drying device.

[0062] Especially when the dipping stops, the sand core 10 needs to be parked as close to the middle of the available space in the dipping pool 31 as possible to avoid collision between the sand core 10 and the inner wall of the coating pool.

[0063] Specifically, for sand cores of different sizes and models, the optimal stop position corresponding to each clamp 41 can be determined through actual debugging. A sensor is provided at the optimal stop position to detect the position of the clamp 41. When the sensor detects that the clamp 41 is in place, the horizontal movement of the clamp 41 will be stopped, so that the sand core stops moving and is located in a suitable working position.

[0064] In this embodiment, preferably, the hanger is provided with a lifting device at the dipping stop position.

[0065] In order to realize the dipping and coating of the sand core 10, the lifting device is provided with a lifting device at the dipping and coating stop position, so that the sand core 10 located above the coating pool can fall into the coating pool by lowering the height, thereby completing the dipping and coating operation.

[0066] One implementation method is to raise and lower the clamp 41. The clamp 41 is connected to a winding device such as a winch by a wire rope or a chain, and the winch is fixed on the clamp 41 and can move on the track together with the clamp 41. The clamp 41 can be raised and lowered by rotating the winch forward and reversely. However, when this method is used, after the clamp 41 falls into the painting pool, the sand core 10 may swing in the painting pool under the impact of the rotating paint, and even collide with the inner wall of the painting pool.

[0067] Preferably, the clamp 41 is rigidly connected to the sand core 10, and the clamp is also slidably rigidly connected to the track. The track is set to be a liftable track. When the sand core 10 needs to be lowered into the painting pool, the track at this position is lowered, so that the clamp 41 is lifted and lowered at the same time, and the sand core 10 can also enter the painting pool. In this way, there is no risk of the sand core 10 shaking in the painting pool.

[0068] The applicant used a coating equipment, in which the circulating pump 1 was set as a slurry pump, and the main parameters included: shaft power 18.8kw, efficiency 56.2%, head 43.2m, flow 90m 3 The inner diameters of the inflow pipe 21 and the outflow pipe 22 used in conjunction with the slurry pump are both 80 cm.

[0069] The coating pool in the coating equipment has a diameter of 3.5 m and a depth of 1.7 m, wherein the depth of the confluence pool 32 at the bottom is 0.5 m, the depth of the dipping pool 32 is 1.2 m, and the depth of the coating in the dipping pool 32 is about 1 m.

[0070] The painting equipment also includes two inflow pipes 21, the axes of the two inflow pipes 21 and the axial angle with the dipping pool 32 is about 60°, the upper inflow pipe 21 is 0.7m away from the bottom of the dipping pool 32, and the outlet is arranged on the inner wall of the dipping pool 32, and the lower inflow pipe 21 is 0.5m away from the bottom of the dipping pool 32. With the cooperation of the two inflow pipes 21, an obvious vortex can be formed on the surface of the paint. When the depth of the paint is deeper, the vortex is not obvious, but when the depth of the paint is shallow, the vortex is clearly visible. Therefore, the use of the painting equipment can effectively achieve the stirring effect on the paint in the dipping pool 32.

[0071] The preferred embodiments of the present invention are described in detail above in conjunction with the accompanying drawings. However, the present invention is not limited to the specific details in the above embodiments. Within the technical concept of the present invention, the technical solution of the present invention can be subjected to a variety of simple modifications, and these simple modifications all belong to the protection scope of the present invention.

[0072] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, the present utility model will not further describe various possible combinations.

[0073] In addition, various embodiments of the present invention may be arbitrarily combined, and as long as they do not violate the concept of the present invention, they should also be regarded as the contents disclosed by the present invention.

Claims

1. A painting device, characterized in that: The painting equipment comprises a painting pool, a circulation system and a hanger located above the painting pool, one end of the circulation system is connected to the bottom of the painting pool, and the other end is connected to the top of the painting pool, the circulation system comprises a circulation pump (1), under the action of the circulation pump (1), the paint in the painting pool is pumped out from the bottom and flows into from the top; The circulation system further comprises an inflow pipeline (21), one end of which is connected to the outlet of the circulation pump (1), and the other end of which is connected to the upper part of the painting pool. The axis of the inflow pipeline (21) and the axial direction of the painting pool are arranged at an angle θ, 45°≤θ≤90°.

2. The painting device according to claim 1, characterized in that: The coating pool comprises an upper dipping pool (31) and a lower confluence pool (32); the dipping pool (31) is arranged in a cylindrical shape, the confluence pool (32) is arranged in a conical shape, and the confluence pool (32) is arranged coaxially with the dipping pool (31).

3. The painting device according to claim 2, characterized in that: A confluence outlet (33) is provided at the bottom of the conical confluence pool (32), and the inlet of the circulation pump (1) is connected to the confluence outlet (33).

4. The painting device according to claim 3, characterized in that: A plurality of the inflow pipes (21) are provided, and the plurality of the inflow pipes (21) extend into the dipping pool (31). The lengths of the plurality of the inflow pipes (21) extending into the dipping pool (31) are different.

5. The painting device according to claim 4, characterized in that: The outlet of the inflow pipeline (21) is arranged as an oblique cross section of the inflow pipeline (21).

6. The painting device according to claim 5, characterized in that: The outlets of the plurality of inflow pipes (21) have different heights.

7. The painting device according to claim 1, characterized in that: The hanger comprises a track and a clamp (41) located below the track and capable of moving along the track, wherein the clamp (41) is used for clamping the sand core.

8. The painting device according to claim 7, characterized in that: The track is provided with three stop positions: a loading stop position, a dipping stop position and an unloading stop position.

9. The painting device according to claim 8, characterized in that: The hanger is provided with a lifting device at the dipping stop position.

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