A powder coating hopper anti-blocking device

Abstract

The application discloses a powder coating hopper anti-blocking device and relates to the technical field of anti-blocking devices.The device comprises a screening structure, which comprises a screening assembly and a guide assembly; the guide assembly and the screening assembly are driven to displace synchronously to screen the powder coating; the guide assembly and the screening assembly are driven to displace synchronously to screen the powder coating through the synergistic effect of a reflecting plate, a blocking plate and a triangular guide plate and in combination with the collocation of a spiral structure; the effective separation of fine-particle coating and large-particle coating is realized; the reflecting plate is obliquely installed, the kinetic energy advantage of the large-particle coating is utilized, the large-particle coating is guided into a powder storage area, the passing of the fine-particle coating is effectively blocked by the blocking plate, the triangular guide plate is designed to be inclined, the large-particle coating can smoothly slide to a coarse material outlet, the accuracy and reliability of the screening result are ensured, the screening assembly is arranged below the emptying hopper, the flying of the fine-particle coating can be avoided, and the adverse phenomenon of dust diffusion is avoided.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of anti-blocking devices, in particular to a powder coating hopper anti-blocking device. BACKGROUND

[0002] Large particle coating is a solid powder synthetic resin coating composed of solid resin and pigment, filler and additive. Unlike ordinary solvent-based coating and water-based coating, its dispersion medium is not solvent and water, but air. It has the characteristics of no solvent pollution, 100% film forming and low energy consumption. Large particle coating has thermoplastic and thermosetting two categories. The appearance of thermoplastic large particle coating is poor, and the adhesion between the coating and the metal is also poor, so it is rarely used in the field of automobile coating. Automobile coating generally uses thermosetting large particle coating. Thermosetting large particle coating is a film-forming powder made of thermosetting synthetic resin. During the drying process, the resin melts first, and then solidifies into a flat and hard coating film after chemical cross-linking. The appearance of the coating film formed by this kind of coating can meet the requirements of automobile finishing in terms of various mechanical properties and corrosion resistance.

[0003] A powder coating hopper anti-blocking device is disclosed in Chinese patent CN221739313U, which includes a conveying mechanism installed at the bottom of the coating hopper. The conveying mechanism includes a connecting pipe fixedly connected at the bottom end of the coating hopper, a conveying pipe fixedly connected at the bottom end of the connecting pipe, a spiral conveying rod movably connected inside the conveying pipe through a bearing, one end of the spiral conveying rod penetrating through the conveying pipe and extending out of one side of the conveying pipe, a first motor fixedly arranged at one end of the spiral conveying rod extending out of one side of the conveying pipe, and the first motor fixed on one side of the conveying pipe through a support for conveying powder. The powder coating forms blocky coating during extrusion. The second motor is started to drive the first shaft to rotate, and the first shaft drives the dispersing rod to rotate, which disperses the blocky coating to prevent the coating from blocking the connecting pipe. The powder coating falls into the conveying pipe through the connecting pipe. The first motor is started to drive the spiral conveying rod to rotate, which conveys the powder coating. Compared with the existing technology that uses a spring to drive a push plate to extrude the material and prevent accumulation, the patent uses a conveying mechanism and a dispersing mechanism to prevent the coating from accumulating in the coating hopper, achieving the effect of anti-blocking.

[0004] During the use of large particle coating, the problem of blockage of the discharged material occurs. The size of the powder particles is not uniform, which can easily lead to unstable fluidization state. Fine particles are easily "entrained" by large particles to form local accumulation. At the same time, due to the high surface energy between fine powders, agglomeration phenomenon is easily occurred, which further aggravates the risk of blockage. In order to solve the above problems, a vibrator and a screening device are often installed on the hopper. The vibrator generates vibration to help the powder to be loose, and the screening device ensures that the powder particles entering the hopper are uniform in size.

[0005] The working principle of the screening device is based on the filtering effect of the screen. When the powder passes through the screen, fine particle powder smaller than the screen hole size will pass through the screen and fall into the collection area below, while large particles larger than the screen hole size will remain above the screen and need to be further processed or reprocessed. Generally, there are two ways to handle large particles, one is to stop manually cleaning large particles above the screen regularly, and the other is to install a gas blowing system above the screen to remove large particles regularly or continuously. However, during the gas blowing process, high-speed airflow may cause large particle paint to fly and spread dust, which requires additional dust collection devices to recover, increasing the complexity and cost of the equipment. In addition, different particle characteristics require different airflow rates, making it difficult to accurately adjust the airflow rate to adapt to different particle characteristics of large particle paint.

[0006] To this end, the present application provides a powder coating hopper anti-blocking device to solve the above problems. SUMMARY

[0007] In view of the problems existing in the prior art, the present application is proposed.

[0008] To solve the above technical problems, the present application provides the following technical scheme: a powder coating hopper anti-blocking device, comprising an emptying hopper, the bottom end of the emptying hopper is provided with a plurality of flow guide ports for batch discharging;

[0009] A spiral structure is inserted into the flow guide port of the emptying hopper and rotates to agitate the powder coating and break up the agglomeration structure of the powder coating, so as to drive the powder coating to fall into the flow guide port under gravity and be emptied;

[0010] A driving structure, comprising a driving unit and an acting unit, the driving unit drives the spiral structure to rotate through the acting unit;

[0011] A screening structure, comprising a screening assembly and a guide assembly, the spiral structure acts on the screening assembly to drive the guide assembly and the screening assembly to displace synchronously to screen the powder coating, the guide assembly comprises a reflecting plate, a blocking plate and a triangular guide plate, the blocking plate is connected to the bottom of the triangular guide plate and forms a powder accumulation area with the triangular guide plate, the reflecting plate is arranged above the blocking plate and forms a certain angle with the blocking plate, the large particle coating falling into the screening assembly through the flow guide port is accelerated and impacts the blocking plate, the large particle coating is guided and projected by the blocking plate and is reflected by the reflecting plate, and jumps into the powder accumulation area for screening.

[0012] As a preferred scheme of the powder coating hopper anti-blocking device, the screening assembly comprises a screening disc and a rectangular rack fixed to the bottom of the screening disc and engaged with the screw structure, the screw structure drives the screening disc to perform a reciprocating linear motion through the rectangular rack, and the reciprocating linear motion of the screening disc acts on the large-particle coating to generate a speed.

[0013] The screening disc is composed of a screen mesh at the bottom and a frame plate enclosed on the side of the screen mesh, the screen mesh surface forms a hole for fine-particle outlet, and the side of the screening disc facing the main hopper is provided with a coarse-particle outlet, and the large-particle coating with the generated speed is guided out through the coarse-particle outlet.

[0014] As a preferred scheme of the powder coating hopper anti-blocking device, the outer wall of the emptying hopper is fixed with a coaxial main hopper, the main hopper comprises an annular cylinder and a conical cylinder connected in the form of flanges, the upper end of the annular cylinder is provided with an inlet, and the lower end of the conical cylinder is provided with a main outlet.

[0015] A conical protrusion is upwardly extended at the center of the emptying hopper, an arc-shaped passageway for accommodating the large-particle coating is formed between the inner wall of the emptying hopper and the conical protrusion, the surface of the arc-shaped passageway is vertically penetrated by a plurality of circular holes at equal intervals, and a flow guide plate is enclosed at each of the circular holes, and the lower end of the flow guide plate is formed into a flow guide port.

[0016] As a preferred scheme of the powder coating hopper anti-blocking device, the screw structure comprises a screw shaft and a screw blade, the screw shaft extends to the lower part of the emptying hopper along the flow guide port in the emptying hopper, the screw blade is arranged in a spiral shape on the upper part of the screw shaft, and the screw blade is driven to rotate by the screw shaft to act on the large-particle coating to loosen the large-particle coating.

[0017] The screw structure further comprises a scraper arranged at the middle part of the screw shaft, the scraper is tightly attached to the flow guide plate and is driven to rotate by the screw shaft, and the rotating scraper scrapes the residual powder on the flow guide plate.

[0018] As a preferred scheme of the powder coating hopper anti-blocking device, the screw structure further comprises a gear set arranged at the bottom of the screw shaft, and the gear set comprises a half-tooth gear and an annular gear.

[0019] The driving unit comprises a driving motor and an extension rod connected to the output shaft end of the driving motor, the acting unit is configured as an acting gear coaxially arranged at the bottom end of the extension rod, and the driving motor drives the acting gear to rotate through the extension rod to engage and drive the annular gear.

[0020] As a preferred scheme of the powder coating hopper anti-blocking device, the annular gear acts on the half-tooth gear through the screw shaft, so that the half-tooth gear is intermittently engaged with the two rows of rack teeth of the rectangular rack, to drive the reciprocating linear displacement of the screening disc.

[0021] As a preferred scheme of the powder coating hopper anti-blocking device, the outer wall of the coarse material outlet is fixed with an external plate for adjusting the movement trajectory of the large-particle coating, and the large-particle coating passing through the coarse material outlet is supported by the external plate and changes the trajectory of the projection.

[0022] As a preferred scheme of the powder coating hopper anti-blocking device, the inner wall of the annular cylinder is fixed with a linear guide rail for supporting the screening disc, and the surface of the screening disc is fixed with a guide rail slider, the guide rail slider is engaged with the linear guide rail, and the screening disc is driven by an external force to run along the track surface of the linear guide rail through the guide rail slider.

[0023] As a preferred scheme of the powder coating hopper anti-blocking device, the surface of the conical cylinder is provided with a side discharge port, and the inner wall of the conical cylinder is fixed with an annular vertical plate, and the annular vertical plate and the conical cylinder form a triangular area for accommodating large-particle coating, and the large-particle coating entering the triangular area is discharged through the side discharge port.

[0024] As a preferred scheme of the powder coating hopper anti-blocking device, the conical protrusion inner cavity is provided with a protection structure supported by an arc-shaped supporting plate, and the protection structure is used for sealing the upper and lower ports of the conical protrusion to form a sealed space for installing a driving motor with the conical protrusion.

[0025] The present application has the following advantages: through the synergistic effect of the reflection plate, the barrier plate and the triangular guide plate, and in combination with the use of the spiral structure, the guiding assembly and the screening assembly are driven to displace synchronously to screen the powder coating, so that the fine-particle coating and the large-particle coating are effectively separated. The reflection plate is installed obliquely, the kinetic energy of the large-particle coating is utilized to guide it into the powder accumulation area, the barrier plate effectively blocks the passage of the fine-particle coating, and the separation efficiency of the fine-particle coating and the large-particle coating is improved. The triangular guide plate is designed with an inclined surface, which ensures that the large-particle coating can smoothly slide to the coarse material outlet, and guarantees the accuracy and reliability of the screening result. The screening assembly is arranged below the emptying hopper, which can avoid the flying of the fine-particle coating and the adverse phenomenon of dust diffusion. BRIEF DESCRIPTION OF DRAWINGS

[0026] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed to be used in the embodiments description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without any creative effort based on these drawings.

[0027] Figure 1 It is a whole structure schematic diagram of a powder coating hopper anti-blocking device;

[0028] Figure 2 It is an internal structure schematic diagram of a main hopper in the present application;

[0029] Figure 3 It is an internal structure schematic diagram of an emptying hopper in the present application;

[0030] Figure 4 It is a bottom structure schematic diagram of the emptying hopper in the present application;

[0031] Figure 5 It is a whole structure schematic diagram of a spiral structure in the present application;

[0032] Figure 6 It is a whole structure schematic diagram of a protection structure in the present application;

[0033] Figure 7 It is a whole structure schematic diagram of a screening structure in the present application;

[0034] Figure 8 It is a structure detail diagram at a gear set in the present application;

[0035] Figure 9 It is a structure detail at a protection structure in the present application Figure 1 ;

[0036] Figure 10 It is a structure detail diagram at a screening disc in the present application;

[0037] Figure 11 It is a whole structure isometric view of the screening disc in the present application;

[0038] Figure 12 It is a structure detail at a protection structure in the present application Figure 2 .

[0039] Figure 13 It is a structure detail diagram at a barrier plate in the present application.

[0040] 11, main hopper; 111, annular cylinder; 112, conical cylinder; 113, side discharge port; 114, annular vertical plate; 12, main discharge port; 21, emptying hopper; 22, flow guide port; 23, conical protrusion; 231, arc-shaped support plate; 24, arc-shaped passageway; 25, triangular support plate; 26, flow guide plate; 31, spiral shaft; 32, spiral blade; 33, scraper; 34, gear set; 341, half-tooth gear; 342, annular gear; 41, driving motor; 42, extension rod; 43, action gear; 51, linear guide rail; 52, guide rail slider; 61, screening disc; 611, screen; 612, frame plate; 613, rectangular groove; 62, rectangular rack; 63, coarse material outlet; 64, fine material outlet; 65, reflector plate; 66, barrier plate; 67, triangular guide plate; 68, external plate; 69, blocking plate; 71, upper cover; 72, lower cover; 721, central plate body; 722, side plate body; 723, arc-shaped groove; 73, combined rod; 731, upper rod; 732, lower rod. DETAILED DESCRIPTION

[0041] In order to make the above objectives, features and advantages of the present application more obvious and easy to understand, the specific embodiments of the present application will be described in detail below with reference to the accompanying drawings.

[0042] In the following description, a large number of specific details are set forth in order to provide a thorough understanding of the present application, but the present application can also be implemented in other ways different from those described herein, and those skilled in the art can make similar generalizations without departing from the concept of the present application, so the present application is not limited to the specific embodiments disclosed below.

[0043] Secondly, "one embodiment" or "embodiment" referred to herein means that a specific feature, structure or characteristic can be included in at least one implementation of the present application. "In one embodiment" appearing in different places in the specification does not mean the same embodiment, nor is it an embodiment that is separate or alternative to other embodiments.

[0044] Embodiment 1

[0045] Referring to Figures 1-13 Fig. 1 shows a first embodiment of the present application, which is a powder coating hopper anti-blocking device, comprising:

[0046] A main hopper 11, the inner cavity of the main hopper 11 is provided with an emptying hopper 21 at the upper part, and a main discharge port 12 at the lower end, the bottom end of the emptying hopper 21 is provided with a plurality of flow guide ports 22 for batch discharging, and a conical protrusion 23 extends upward at the center of the emptying hopper 21, an arc-shaped passageway 24 for accommodating large particle coatings is formed between the inner wall of the emptying hopper 21 and the conical protrusion 23, the plurality of flow guide ports 22 are arranged in the arc-shaped passageway 24, and a screening cavity is formed between the emptying hopper 21 and the main hopper 11.

[0047] As Figure 1 and Figure 2 shown, the emptying bucket 21 is arranged in a tapered cylinder with a large upper and small lower and a smooth transition of the inner wall from top to bottom. The arc-shaped inner wall of the emptying bucket 21 and the conical protrusion 23 form an arc-shaped passageway 24 for accommodating large particles of paint. The flow guide port 22 is located on the arc-shaped passageway 24. The powder paint entering the emptying bucket 21 is guided to the arc-shaped passageway 24 through the arc-shaped inner wall of the emptying bucket 21 and the conical protrusion 23. The powder paint then enters the screening cavity in batches through the multiple flow guide ports 22 and is discharged.

[0048] The main hopper 11 includes an annular cylinder 111 and a conical cylinder 112 connected by flanges. The main discharge port 12 is the lower end of the conical cylinder 112, and the upper end of the annular cylinder 111 is the inlet. The emptying bucket 21 is fixedly connected to the annular cylinder 111. The powder paint entering the main hopper 11 through the inlet falls into the screening cavity through the emptying bucket 21 and the flow guide port 22.

[0049] As Figure 4 shown, the edge of the emptying bucket 21 is also fixed with multiple triangular support plates 25, and the main hopper 11 supports the emptying bucket 21 through the multiple triangular support plates 25.

[0050] As Figure 3 and Figure 4 shown, the surface of the emptying bucket 21 is vertically penetrated by multiple circular holes at equal intervals, and each circular hole is enclosed by a flow guide plate 26. The enclosed flow guide plates 26 form a tapered cylinder with a large upper and small lower. The lower end of the tapered cylinder is the flow guide port 22. The powder paint in the emptying bucket 21 is collected through the flow guide plates 26 and discharged through the flow guide port 22. The number of flow guide ports 22 is multiple. The powder paint entering the emptying bucket 21 is divided into batches by the flow guide ports 22. The batched powder paint enters the screening cavity through different flow guide ports 22.

[0051] The spiral structure is inserted into the screening cavity through the flow guide port 22 of the emptying bucket 21 and rotates to stir the powder paint to break the agglomeration structure of the powder paint and drive the powder paint to flow down.

[0052] Specifically, powder paint often has the problem of poor flow during use, especially in the hopper, which is prone to local accumulation or bridging, resulting in uneven powder flow. To solve this problem, a spiral structure is added inside the emptying bucket 21 to improve the flow of powder paint.

[0053] Referring to Figure 5As shown, the spiral structure comprises a spiral shaft 31 extending along the flow guide 22 in the emptying hopper 21 to the lower part of the emptying hopper 21, and spiral blades 32 arranged in a spiral on the upper part of the spiral shaft 31, the spiral blades 32 are driven to rotate by the spiral shaft 31 to act on the powder coating to loosen the powder coating.

[0054] The spiral structure further comprises a gear set 34 arranged at the bottom of the spiral shaft 31, the gear set 34 comprises a half-tooth gear 341 and a ring gear 342.

[0055] Specifically, when the spiral shaft 31 rotates, the spiral blades 32 break the agglomeration phenomenon between the powder coatings by stirring to keep them in a loose state, and the loose powder coatings fall under the action of gravity into the flow guide 22 into the screening cavity. This stirring action helps to prevent fine particles in the powder coating from being "entrained" by large particles to form local accumulation, while also improving the fluidization state of the powder, making it more uniformly flow into the screening cavity. Through the continuous stirring of the spiral blades 32, the spiral blades 32 effectively prevent fine particles from being "entrained" by large particles to form local accumulation, reducing the risk of clogging.

[0056] The spiral structure further comprises a scraper 33 arranged at the middle part of the spiral shaft 31, the scraper 33 is in close contact with the flow guide plate 26 and is driven to rotate by the spiral shaft 31, the rotating scraper 33 scrapes the residual powder on the flow guide plate 26, preventing the powder from accumulating on the flow guide plate 26 and ensuring smooth discharge of the powder coating.

[0057] The conical protrusion 23 is provided with a driving structure, the driving structure comprises a driving unit and an acting unit, the acting unit is engaged with the ring gear 342, and the driving unit drives the acting unit to act on the ring gear 342 to drive the ring gear 342 to rotate.

[0058] As shown in Figure 7 The driving unit comprises a driving motor 41 and an extension rod 42 connected to the output shaft end of the driving motor 41, and the acting unit is configured as an acting gear 43 coaxially arranged at the bottom end of the extension rod 42, the driving motor 41 drives the acting gear 43 to rotate through the extension rod 42 to engage and drive the ring gear 342.

[0059] As shown in Figure 2 The number of screening structures is three, and the three screening structures are located directly below the flow guide 22 of the emptying hopper 21, the inner wall of the annular cylinder 111 is fixed with a linear guide rail 51 for supporting the screening disc 61, and the surface of the screening disc 61 is fixed with a guide rail sliding block 52, the guide rail sliding block 52 is clamped on the linear guide rail 51, and the screening disc 61 is driven by an external force to run along the track surface of the linear guide rail 51 through the guide rail sliding block 52.

[0060] The screening structure includes a screening component and a guiding component. The screening component includes a screening disc 61 and a rectangular rack 62. The screening disc 61 has a coarse material outlet 63 on the side facing the main hopper 11. The rectangular rack 62 is fixed to the bottom of the screening disc 61 and meshes with a half-tooth gear 341. During the rotation, the half-tooth gear 341 intermittently meshes with the two rows of racks of the rectangular rack 62, thereby driving the screening disc 61 to reciprocate linearly. Large particles of coating are discharged from the coarse material outlet 63.

[0061] The screening disc 61 consists of a screen 611 at the bottom and a frame plate 612 surrounding the side of the screen 611. The holes formed on the surface of the screen 611 are fine material outlets 64. The reciprocating linearly moving screening disc 61 screens the powder coating. The screened fine particles of coating pass through the fine material outlet 64, while the screened large particles of coating are retained on the screening disc 61. The reciprocating linearly moving screening disc 61 applies friction to the large particles of coating, giving them a certain speed. The moving large particles of coating are discharged through the coarse material outlet 63.

[0062] like Figure 10 , Figure 11 as well as Figure 13 As shown, the guiding assembly includes a reflector 65, a baffle plate 66, and a triangular guide plate 67. The triangular guide plate 67 is located at the end of the screen 611 near the coarse material outlet 63, and its upper edge is connected to the coarse material outlet 63. The inclined surface of the triangular guide plate 67 forms a platform for guiding the rolling of large particles of coating, thereby guiding the large particles of coating into the coarse material outlet 63 and ensuring that the large particles of coating can be discharged smoothly. The baffle plate 66 is connected to the bottom of the triangular guide plate 67 and forms a powder storage structure with the triangular guide plate 67. In the powder retention area, a reflector plate 65 is positioned above a baffle plate 66 and forms a certain angle with the baffle plate 66. The reflector plate 65 is obliquely mounted on the frame plate 612. Particles impacting the baffle plate 66 are reflected onto the reflector plate 65. Large particles of coating falling into the screening assembly through the guide port 22 are accelerated and impact the baffle plate 66. The large particles of coating are guided and projected by the baffle plate 66 and reflected by the reflector plate 65, jumping into the powder retention area for screening. The large particles of coating located in the powder retention area are discharged through the coarse material outlet 63.

[0063] Specifically, the triangular guide plate 67 is located at one end of the screen 611 near the coarse material outlet 63, and the upper edge of the triangular guide plate 67 is connected to the coarse material outlet 63. The inclined surface of the triangular guide plate 67 forms a platform for guiding the rolling of large particles of coating, so as to guide the large particles of coating to smoothly enter the coarse material outlet 63 and ensure that the large particles of coating can be discharged smoothly.

[0064] The baffle plate 66 is connected to the bottom of the triangular guide plate 67 and forms a powder storage area with the triangular guide plate 67. This area is used to temporarily store large particles of coating, separate large particles of coating from fine particles of coating, and improve screening efficiency.

[0065] The reflection plate 65 is obliquely installed on the frame plate 612, and when the particle powder impacting the barrier plate 66 is reflected onto the reflection plate 65, it will jump into the powder storage area under the action of the reflection plate 65.

[0066] Specifically, the powder storage area is used to accept large particle coatings guided by the barrier plate 66 and the reflection plate 65. Among them, the large particle coatings have strong attraction between each other and weak movement ability, and the movement ability of large particle coatings is stronger than that of fine particle coatings. Therefore, the large particle coatings will hit the barrier plate 66, and under the action of the barrier plate 66 and gravity, an arc-shaped drooping path is formed, and the drooping large particle coatings fall on the reflection plate 65, impact the reflection plate 65 to produce a rebound effect, and the large particle coatings jump over the barrier plate 66 into the powder storage area. With the continuous reciprocating linear displacement of the screening disc 61, this movement drives the large particle coatings to continuously impact the inclined surface of the triangular guide plate 67, and finally discharged from the discharge port.

[0067] Through the cooperation of the reflection plate 65, the barrier plate 66 and the triangular guide plate 67, not only the separation efficiency of large particle coatings is improved, but also the misdischarge of fine particle coatings is effectively reduced, ensuring the accuracy and reliability of the screening process. The synergistic effect of the reflection plate 65, the barrier plate 66 and the triangular guide plate 67 enables the powder coating to be fully separated before entering the coarse material outlet 63, avoiding the mixing of fine particle coatings. This design not only improves the screening efficiency, but also ensures the accuracy and reliability of the screening result, which is suitable for various occasions that require efficient separation of different particle sizes of powder.

[0068] Through the cooperation of the reflection plate 65, the barrier plate 66 and the triangular guide plate 67, the fine particle coatings and the large particle coatings are effectively separated. The reflection plate 65 is obliquely installed, which uses the kinetic energy advantage of large particle coatings to guide them into the powder storage area; the design of the barrier plate 66 effectively blocks the passage of fine particle coatings; the triangular guide plate 67 is designed with an inclined surface to ensure that the large particle coatings can smoothly slide to the coarse material outlet 63. This multi-layer guide design not only improves the screening efficiency, but also ensures the accuracy and reliability of the screening result, which is suitable for various occasions that require efficient separation of different particle sizes of powder.

[0069] The screen mesh 611 of the screening disc 61 is also provided with a rectangular groove 613, which forms a channel for the elongated rod 42 to run, and the upper surface of the rectangular groove 613 is blocked by a blocking plate 69, which is fixed on the elongated rod 42 and penetrates the reflection plate 65, the barrier plate 66, the triangular guide plate 67 and the screening disc 61.

[0070] The blocking plate 69 is an elastic expansion plate body, which intermittently abuts against the inner wall of the main hopper 11 and the surface of the elongated rod 42 with the movement of the elongated rod 42.

[0071] The blocking plate 69 is used to block the rectangular groove 613 to prevent the un-screened powder from leaking out of the rectangular groove 613 directly.

[0072] The outer plate 68 for adjusting the trajectory of the large-particle coating is fixed to the outer wall of the coarse outlet 63 of the screening disc 61, and the large-particle coating passing through the coarse outlet 63 is supported and changed in trajectory by the outer plate 68.

[0073] As shown in Figure 2 The surface of the conical cylinder 112 is provided with a side discharge port 113, and the inner wall of the conical cylinder 112 is fixed with an annular vertical plate 114, and the annular vertical plate 114 and the conical cylinder 112 form a triangular area for accommodating large-particle coating, and the large-particle coating entering the triangular area is discharged through the side discharge port 113.

[0074] Specifically, during the linear reciprocating displacement of the screening disc 61, when the screening disc 61 moves towards the coarse outlet 63, the large-particle coating will be subjected to the forward thrust of the blocking plate 66, so that the large-particle coating generates acceleration, at this time the screening disc 61 moves away from the coarse outlet 63, but the large-particle coating still rushes up the triangular guide plate 67 at a certain speed. Under the guidance of the inclined surface of the triangular guide plate 67, the large-particle coating slides towards the coarse outlet 63. When the large-particle coating rushes out of the coarse outlet 63, it has a certain initial speed, and due to the effect of the initial speed and gravity, the large-particle coating will move along a parabolic trajectory after rushing out of the coarse outlet 63.

[0075] In order to change this parabolic trajectory and ensure that the large-particle coating can enter the triangular area, an outer plate 68 is fixed to the outer wall of the coarse outlet 63, located below or on the side of the coarse outlet 63, and arranged in an inclined manner, which gives the large-particle coating an upward supporting force to change the trajectory of the large-particle coating, so as to ensure that the large-particle coating can be discharged along the predetermined trajectory.

[0076] Embodiment 2

[0077] Referring to Figure 4 and Figure 12 As shown, this is the second embodiment of the present application, which is based on the previous embodiment, except that the conical protrusion 23 is a hollow structure, which communicates with the screening cavity and the upper cavity of the emptying hopper 21, and a plurality of arc-shaped support plates 231 are fixed to the inner wall of the conical protrusion 23 at equal intervals.

[0078] The conical protrusion 23 is provided with a protection structure which is supported by the arc-shaped support plates 231.

[0079] The protective structure comprises an upper cover 71 and a lower cover 72, and a plurality of combined rods 73 are arranged between the upper cover 71 and the lower cover 72, the upper cover 71 and the lower cover 72 are connected into one body through the combined rods 73, the combined rods 73 are upper rods 731 and lower rods 732 that are mutually clamped, the upper rods 731 and the lower rods 732 are arranged in a flange connection mode, the upper rods 731 are connected to the upper cover 71, the lower rods 732 are connected to the lower cover 72, and the lower cover 72 stretches the upper cover 71 through the combined rods 73, so that the upper cover 71 is tightly connected with the upper surface of the conical protrusion 23.

[0080] The lower cover 72 comprises a center plate body 721 and a plurality of side plate bodies 722, the adjacent two side plate bodies 722 are abutted, and the side plate bodies 722 are hinged to the outer surface of the center plate body 721; the hinged connection design makes the lower cover 72 deformable to enter the inner cavity of the conical protrusion 23, so that the lower cover 72 enters the inner cavity of the conical protrusion 23.

[0081] The side plate bodies 722 are further provided with a plurality of arc-shaped grooves 723 for embedding the plurality of arc-shaped supporting plates 231, and the driving motor 41 is installed on the center plate body 721, and the output end of the driving motor 41 penetrates through the center plate body 721 and is connected with the extension rod 42.

[0082] The inner wall of the conical protrusion 23, the upper cover 71 and the lower cover 72 form a sealed space, the space is used for installing the driving motor 41, and the large-particle coating is prevented from entering the inside of the driving motor 41 to cause the failure of the driving motor 41 and affect the shutdown of the driving motor 41.

[0083] Of course, the above content is only the preferred embodiment of the present application, and cannot be considered as limiting the scope of the embodiment of the present application. The present application is also not limited to the above examples, and the equivalent changes and improvements made by the ordinary skilled in the art within the essential scope of the present application should be attributed to the patent coverage range of the present application.

[0084] Finally, it should be pointed out that: first, in the description of the present application, it should be pointed out that, unless otherwise specified and limited, the terms “installation”, “connection”, “connection” should be understood in a broad sense, which can be mechanical connection or electrical connection, or the communication between two elements, or direct connection, “up”, “down”, “left”, “right” and the like are only used to indicate the relative positional relationship, when the absolute position of the described object changes, the relative positional relationship may change;

[0085] Secondly: the present application discloses the structure involved in the embodiment of the present application, and other structures can refer to the general design, and the same embodiment and different embodiments of the present application can be combined with each other under the condition of no conflict;

[0086] Finally: the above only for the preferred embodiments of the present application, and not for limiting the present application, any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application, should be included in the scope of protection of the present application.

Claims

1. A powder coating hopper anti-jamming device characterized by, The application relates to a powder coating screening device, which comprises the following parts: an emptying hopper (21) provided with a plurality of guide openings (22) at the bottom end for batch discharging; a spiral structure inserted into the guide openings (22) of the emptying hopper (21) and capable of stirring the powder coating and destroying the agglomerated structure of the powder coating by rotating so as to drive the powder coating to fall into the guide openings (22) under the action of gravity and be discharged; a driving structure comprising a driving unit and an acting unit, wherein the driving unit drives the spiral structure to rotate through the acting unit; a screening structure comprising a screening assembly and a guide assembly, wherein the spiral structure acts on the screening assembly, drives the guide assembly and the screening assembly to synchronously displace so as to screen the powder coating, the guide assembly comprises a reflecting plate (65), a blocking plate (66) and a triangular guide plate (67), the blocking plate (66) is connected to the bottom of the triangular guide plate (67) and forms a powder storage area together with the triangular guide plate (67), the reflecting plate (65) is arranged above the blocking plate (66) and forms a certain angle with the blocking plate (66), the large-particle coating falling into the screening assembly through the guide openings (22) is accelerated and impacts the blocking plate (66), the large-particle coating is guided and projected by the blocking plate (66) and is reflected by the reflecting plate (65) and jumps into the powder storage area for screening; the screening assembly comprises a screening disc (61) and a rectangular rack (62), the rectangular rack (62) is fixed to the bottom of the screening disc (61) and is engaged with the spiral structure, the spiral structure drives the screening disc (61) to present a reciprocating linear motion through the rectangular rack (62), and the screening disc (61) presenting the reciprocating linear motion acts on the large-particle coating to generate a speed; the screening disc (61) is composed of a screen mesh (611) at the bottom and a frame plate (612) enclosed on the side of the screen mesh (611), the holes formed on the surface of the screen mesh (611) are fine-particle outlets (64), one side of the screening disc (61) facing the main hopper (11) is provided with a coarse-particle outlet (63), and the large-particle coating generating the speed is guided out through the coarse-particle outlet (63); a coaxial main hopper (11) is fixed to the outer wall of the emptying hopper (21), the main hopper (11) comprises a ring-shaped cylinder (111) and a conical cylinder (112) which are flange-connected, the upper end of the ring-shaped cylinder (111) is provided with an inlet, and the lower end of the conical cylinder (112) is provided with a main outlet (12); a conical protrusion (23) is upwardly extended at the center of the emptying hopper (21), an arc-shaped passageway (24) for accommodating the large-particle coating is formed between the inner wall of the emptying hopper (21) and the conical protrusion (23), a plurality of circular holes are vertically and equidistantly formed on the surface of the arc-shaped passageway (24), and a guide plate (26) is enclosed at each circular hole, and the lower end of the guide plate (26) is formed into the guide opening (22). The spiral structure comprises a spiral shaft (31) extending along the flow guide (22) in the emptying hopper (21) to the lower part of the emptying hopper (21), and a spiral blade (32) arranged in a spiral on the upper part of the spiral shaft (31), the spiral blade (32) being driven to rotate by the spiral shaft (31) to act on the large-particle coating to loosen the large-particle coating. The spiral structure further comprises a scraper (33) arranged at the middle part of the spiral shaft (31), the scraper (33) being in close contact with the flow guide plate (26) and being driven to rotate by the spiral shaft (31), the rotating scraper (33) scraping the residual powder on the flow guide plate (26). The spiral structure further comprises a gear set (34) arranged at the bottom of the spiral shaft (31), the gear set (34) comprising a half-tooth gear (341) and a ring gear (342). The driving unit comprises a driving motor (41) and an extension rod (42) connected to the output shaft end of the driving motor (41), the acting unit being configured as an acting gear (43) coaxially arranged at the bottom end of the extension rod (42), the driving motor (41) driving the acting gear (43) to rotate through the extension rod (42) to engage and drive the ring gear (342).

2. The powder coating hopper anti-blocking apparatus of claim 1, wherein: The ring gear (342) acts on the half-tooth gear (341) through the spiral shaft (31), so that the half-tooth gear (341) is intermittently engaged with the two rows of racks of the rectangular rack (62) to drive the screening disc (61) to reciprocatingly linearly displace.

3. The powder coating hopper anti-jamming device of claim 2, wherein: The outer wall of the coarse material outlet (63) of the screening disc (61) is fixed with an external plate (68) for adjusting the trajectory of the large-particle coating, and the large-particle coating passing through the coarse material outlet (63) is supported and changes the trajectory by the external plate (68).

4. The powder coating hopper anti-jamming device of claim 3, wherein: The inner wall of the annular cylinder (111) is fixed with a linear guide rail (51) for supporting the screening disc (61), and the surface of the screening disc (61) is fixed with a guide rail slider (52) engaged with the linear guide rail (51), the screening disc (61) being driven by an external force to run along the track surface of the linear guide rail (51) through the guide rail slider (52).

5. The powder coating hopper anti-jamming device of claim 4, wherein: The surface of the conical cylinder (112) is provided with a side discharge port (113), and the inner wall of the conical cylinder (112) is fixed with an annular vertical plate (114), a triangular area for accommodating the large-particle coating being formed between the annular vertical plate (114) and the conical cylinder (112), and the large-particle coating entering the triangular area being discharged through the side discharge port (113).

6. The powder coating hopper anti-jamming device of claim 5, wherein: The inner cavity of the conical protrusion (23) is provided with a protection structure supported by an arc-shaped supporting plate (231), the protection structure being used for sealing the upper and lower ports of the conical protrusion (23) to form a closed space for installing the driving motor (41) with the conical protrusion (23).

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