Preheating device for melamine powder production

Abstract

The utility model relates to the technical field of melamine powder production, and discloses a preheating device for melamine powder production, which comprises a preheating box, a crushing bin is arranged at the upper end in the preheating box, and a preheating bin is arranged at the lower end in the preheating box. Due to the arrangement of the grinding roller, the screening plate, the auger rod and other components, after melamine powder needing to be preheated is poured into the smashing bin, caked melamine powder is smashed through the grinding roller and falls on the surface of the screening plate, and when the auger rod is driven by the servo motor to rotate, through cooperation of the pressing assembly and the pushing assembly, the melamine powder can be smashed, and the melamine powder can be preheated. Melamine powder on the surface of the screening plate is screened, the auger rod conveys the melamine powder which is not completely crushed and caked to the crushing bin again to be crushed until the melamine powder is completely crushed, and the crushed melamine powder is preheated by the heater, so that the phenomenon that the melamine powder is not uniformly preheated when the caked melamine powder is preheated is avoided; and the preheating effect of the melamine powder is further improved.

Description

Technical Field

[0001] The utility model relates to the technical field of melamine powder production, in particular to a preheating device for melamine powder production. Background Art

[0002] Melamine powder, also known as melamine formaldehyde molding compound, is made of melamine formaldehyde resin as the base material, "alpha" cellulose as the filler, and pigments and other additives. The raw materials need to be preheated in the melamine powder processing device.

[0003] A Chinese patent document with the announcement number CN216658544U provides a preheating device for melamine powder production, comprising a box body, the interior of the box body is divided into two parts, an upper part and an lower part, by a partition, and an air outlet and a waste outlet are arranged on the side wall of the box body; a stirring blade on a rotating shaft is driven to rotate by a rotating motor, and a first resistance heating wire is heated, and the stirring blade and the first resistance heating wire cooperate to stir and preheat the raw material so that it is heated evenly, and the raw material after heating falls into a screening cavity under the action of gravity, and then is screened through an inclined screening plate;

[0004] Before the raw materials are preheated, the raw materials themselves may have agglomerated due to factors such as moisture. When the above scheme stirs and preheats the melamine powder raw materials that have been damp and agglomerated, the agglomerated melamine powders are preheated unevenly due to dampness and agglomeration, thereby reducing the preheating effect of the melamine powder raw materials. Therefore, the utility model designs a preheating device for melamine powder production to solve the problems existing in the prior art. Utility Model Content

[0005] The utility model aims to provide a preheating device for melamine powder production to solve the problems raised in the above background technology.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a preheating device for melamine powder production, comprising: a preheating box, a crushing bin is provided at the upper end of the preheating box, a preheating bin is provided at the lower end of the preheating box, and the top of the preheating bin is connected to the bottom of the crushing bin, a rotating shaft is installed in the horizontal direction of the crushing bin, and a rolling roller is fixedly installed on the surface of the rotating shaft, and a plurality of first protrusions are provided on one side of the inner wall of the crushing bin;

[0007] A first through slot is provided on one side of the preheating box, a fixing block is fixedly connected to the inner wall of the preheating bin, a screen plate is hingedly mounted on the surface of the fixing block, and one end of the screen plate extends to the outside of the preheating box through the first through slot;

[0008] A feed hopper is fixedly installed on the top of the preheating box, a sleeve is fixedly installed on one side of the preheating box, and a connecting pipe is fixedly connected to one side of the upper end of the sleeve, one end of the connecting pipe is arranged above the feed hopper, a second through slot is opened on one side of the lower end of the sleeve, one end of the sieve plate is arranged inside the second through slot, an auger rod is rotatably installed in the vertical direction inside the sleeve, a servo motor is fixedly installed on one side of the preheating box, and the output end of the servo motor is fixedly connected to the bottom of the auger rod, and a cam is fixedly installed on the surface of the lower end of the auger rod;

[0009] A pressing assembly is provided on the top of the preheating bin, and the bottom of the pressing assembly is placed on the surface of the top of the sieve plate. A pushing assembly is provided inside one side of the preheating box, and one end of the pushing assembly is provided below the sieve plate. A heater is symmetrically fixedly installed on the inner wall of the preheating bin.

[0010] Preferably, the surface of the rolling roller is provided with a plurality of second protrusions equidistantly distributed, and the second protrusions cooperate with the first protrusions on one side of the inner wall of the crushing bin. The interior of the rolling roller has a cavity, and a plurality of stainless steel balls of the same size are placed inside the cavity.

[0011] Preferably, the pressing assembly includes: a fixing rod, which is fixedly mounted on the top of the preheating bin, a pressing block is movably mounted on the lower end of the fixing rod, and the bottom of the pressing block is placed on the surface of one end of the screening plate, the surface of the fixing rod is covered with a first return spring, and one end of the first return spring is fixedly connected to the surface of the top of the preheating bin, and the other end of the first return spring is fixedly connected to the top of the pressing block.

[0012] Preferably, the pushing assembly comprises: a T-shaped movable rod and a support block, the T-shaped movable rod movably inserted into the interior of one side of the preheating box, one end of the T-shaped movable rod is located on one side of the cam, the surface of one end of the T-shaped movable rod is covered with a second return spring, and one end of the second return spring is fixedly connected to one end of the T-shaped movable rod, the other end of the second return spring is fixedly connected to the surface of the preheating box, the other end of the T-shaped movable rod is fixedly connected to a trapezoidal block, the support block is fixedly connected to the inner wall of the preheating bin, a push rod is movably inserted into the interior of the support block in the vertical direction, and a roller is movably installed at the bottom of the push rod, the bottom of the roller is mounted on the surface of the trapezoidal block, and the top of the push rod is located at the bottom of one end of the screening plate.

[0013] Preferably, a through hole is opened inside the other side of the preheating box, and a filter is fixedly installed between the end of the through hole and the inner wall of the preheating box.

[0014] Preferably, guide plates are symmetrically fixedly connected to both sides of the preheating chamber, and the guide plates are located above the adjacent heaters.

[0015] Compared with the prior art, the beneficial effects of the utility model are as follows:

[0016] 1. The utility model is provided with components such as a rolling roller, a screening plate and an auger rod. After the melamine powder to be preheated is poured into the crushing bin, the agglomerated melamine powder is crushed by the rolling roller and falls on the surface of the screening plate. When the servo motor drives the auger rod to rotate, the melamine powder on the surface of the screening plate is screened by the cooperation of the pressing component and the pushing component. The auger rod then transports the incompletely crushed agglomerated melamine powder to the crushing bin again for crushing until it is completely crushed. The crushed melamine powder is then preheated by the heater, thereby avoiding the phenomenon that the agglomerated melamine powder is not preheated uniformly when being preheated, and further improving the preheating effect of the melamine powder.

[0017] 2. The utility model adopts the arrangement of a rolling roller, a cavity and stainless steel balls. When the rolling roller rotates to crush the agglomerated melamine powder, the stainless steel balls inside the rolling roller irregularly impact the inner wall of the rolling roller, thereby causing vibration inside the rolling roller, thereby preventing some wet melamine powder from adhering to the surface of the rolling roller and affecting the crushing of the agglomerated melamine powder. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the front cross-sectional view of the utility model;

[0019] Figure 2 For the utility model Figure 1 A schematic diagram of the structure enlargement in the middle;

[0020] Figure 3 For the utility model Figure 1 Enlarged schematic diagram of the structure at point B in the middle.

[0021] In the figure: 1. preheating box; 101. first through slot; 102. feed hopper; 2. crushing bin; 201. first protrusion; 3. preheating bin; 4. rotating shaft; 5. rolling roller; 501. second protrusion; 502. cavity; 503. stainless steel ball; 6. fixing block; 7. screening plate; 8. sleeve; 801. connecting pipe; 802. second through slot; 9. auger rod; 901. cam; 10. servo motor; 11. pressing assembly; 1101. fixing rod; 1102. pressing block; 1103. first return spring; 12. pushing assembly; 1201. T-shaped movable rod; 1202. second return spring; 1203. trapezoidal block; 1204. supporting block; 1205. push rod; 1206. roller; 13. heater. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0023] See also Figure 1-3 , the utility model provides an embodiment: a preheating device for melamine powder production, comprising: a preheating box 1, a crushing bin 2 is provided at the upper end inside the preheating box 1, a preheating bin 3 is provided at the lower end inside the preheating box 1, a conical plate is fixedly connected between the front and rear sides of the preheating bin 3, so as to disperse the sieved melamine powder, and the dispersed melamine powder can accelerate the evaporation of internal water, and the top of the preheating bin 3 is connected with the bottom of the crushing bin 2, a rotating shaft 4 is installed in the horizontal direction of the crushing bin 2, and the rotating shaft 4 is rotated by a driving motor, one end of the rotating shaft 4 extends to the outside of the preheating box 1, and a driving motor is fixedly installed on the back side of the preheating box 1, and the output end of the driving motor is fixedly connected to one end of the rotating shaft 4, and a rolling roller 5 is fixedly installed on the surface of the rotating shaft 4, and the melamine powder in the clamping block is rolled and crushed by the setting of the rolling roller 5, so as to avoid preheating of the agglomerated melamine powder and causing the melamine powder to be preheated insufficiently and uniformly, and a plurality of first protrusions 201 are arranged on one side of the inner wall of the crushing bin 2;

[0024] A first through slot 101 is provided on one side of the preheating box 1, a fixing block 6 is fixedly connected to the inner wall of the preheating chamber 3, and a screen plate 7 is hingedly installed on the surface of the fixing block 6, and one end of the screen plate 7 extends to the outside of the preheating box 1 through the first through slot 101;

[0025] A feed hopper 102 is fixedly installed on the top of the preheating box 1, a sleeve 8 is fixedly installed on one side of the preheating box 1, and a connecting pipe 801 is fixedly connected to one side of the upper end of the sleeve 8, one end of the connecting pipe 801 is arranged above the feed hopper 102, a second through slot 802 is opened on one side of the lower end of the sleeve 8, one side of the second through slot 802 is communicated with one side of the first through slot 101, one end of the screening plate 7 is arranged inside the second through slot 802, an auger rod 9 is rotatably installed in the vertical direction inside the sleeve 8, a servo motor 10 is fixedly installed on one side of the preheating box 1, and the output end of the servo motor 10 is fixedly connected to the bottom of the auger rod 9, the auger rod 9 is driven to rotate by the output end of the servo motor 10, the melamine powder inside the sleeve 8 is pushed, and the uncrushed melamine powder is transported to the inside of the crushing bin 2 again for repeated rolling until it is crushed, and a cam 901 is fixedly installed on the surface of the lower end of the auger rod 9;

[0026] A pressing component 11 is provided on the top of the preheating bin 3, and the bottom of the pressing component 11 is placed on the surface of the top of the screening plate 7. A pushing component 12 is provided inside one side of the preheating box 1, and one end of the pushing component 12 is provided below the screening plate 7. Through the cooperation of the pressing component 11 and the pushing component 12, one end of the screening plate 7 is swung up and down, thereby shaking and screening the melamine powder on the surface of the screening plate 7. A heater 13 is symmetrically fixedly installed on the inner wall of the preheating bin 3.

[0027] See also Figure 1-2 In this embodiment, the surface of the rolling roller 5 is provided with a plurality of second protrusions 501 which are evenly distributed, and the second protrusions 501 cooperate with the first protrusions 201 on one side of the inner wall of the crushing bin 2. The interior of the rolling roller 5 has a cavity 502, and a plurality of stainless steel balls 503 of the same size are placed inside the cavity 502. When the rotating shaft 4 drives the rolling roller 5 to rotate, the second protrusions 501 on the surface of the rolling roller 5 and the first protrusions 201 on the inner wall of the crushing bin 2 squeeze and crush the agglomerated melamine powder, so as to prevent the agglomerated melamine powder from affecting the subsequent preheating effect, thereby causing the preheating part to be uniform. When the rolling roller 5 rotates, the stainless steel balls 503 inside the rolling roller 5 irregularly impact the inner wall of the rolling roller 5, so as to generate vibration inside the rolling roller 5, so as to prevent some wet melamine powder from adhering to the surface of the rolling roller 5 and affecting the crushing and crushing of the agglomerated melamine powder.

[0028] See also Figure 1 and Figure 3 In this embodiment, the pressing assembly 11 includes: a fixed rod 1101, the fixed rod 1101 is fixedly mounted on the top of the preheating bin 3, a pressing block 1102 is movably mounted on the lower end of the fixed rod 1101, and the bottom of the pressing block 1102 is placed on the surface of one end of the screening plate 7, and a first return spring 1103 is mounted on the surface of the fixed rod 1101, and one end of the first return spring 1103 is fixedly connected to the surface of the top of the preheating bin 3, and the other end of the first return spring 1103 is fixedly connected to the top of the pressing block 1102. When the cam 901 does not push the T-shaped movable rod 1201 to move, the first return spring 1103 pushes the pressing block 1102 downward, so that the bottom of the pressing block 1102 presses against the surface of the screening plate 7, so that the screening plate 7 deflects downward.

[0029] See also Figure 1 and Figure 3In this embodiment: the pushing component 12 includes: a T-shaped movable rod 1201 and a support block 1204, the T-shaped movable rod 1201 is movably inserted into the interior of one side of the preheating box 1, one end of the T-shaped movable rod 1201 is located on one side of the cam 901, the surface of one end of the T-shaped movable rod 1201 is sleeved with a second return spring 1202, and one end of the second return spring 1202 is fixedly connected to one end of the T-shaped movable rod 1201, the other end of the second return spring 1202 is fixedly connected to the surface of the preheating box 1, the other end of the T-shaped movable rod 1201 is fixedly connected to a trapezoidal block 1203, the support block 1204 is fixedly connected to the inner wall of the preheating bin 3, a push rod 1205 is movably inserted in the vertical direction inside the support block 1204, and a roller 1206 is movably installed at the bottom of the push rod 1205, the bottom of the roller 1206 is built on the surface of the trapezoidal block 1203, and the top of the push rod 1205 is located at the bottom of one end of the screening plate 7. While the output end of the servo motor 10 drives the auger rod 9 to rotate and push the material at the bottom of the casing 8, the convex surface of the cam 901 at the lower end of the auger rod 9 rotates to intermittently press and push one end of the T-shaped movable rod 1201, so that the inclined surface of the trapezoidal block 1203 at the other end of the T-shaped movable rod 1201 squeezes and pushes the roller 1206 at the bottom of the push rod 1205, so that the push rod 1205 moves upward. At this time, the first return spring 1103 is squeezed and contracted, and the push rod 1205 pushes one end of the screening plate 7 to deflect upward, and the convex surface of the cam 901 When the surface does not press against one end of the T-shaped movable rod 1201, the first return spring 1103 pushes the pressing block 1102 to press the top of the screening plate 7, causing one end of the screening plate 7 to deflect downward. Under the repeated pressure of the convex surface of the cam 901, one end of the screening plate 7 swings up and down to produce vibration, thereby screening the melamine powder on the surface of the screening plate 7. The large-particle agglomerated melamine powder passes through the first through groove 101 to the inside of the sleeve 8, and is pushed to the top of the sleeve 8 through the rotation of the auger rod 9, and then falls into the feed hopper 102 through the connecting pipe 801 to be crushed again until it is completely crushed.

[0030] See also Figure 1 In this embodiment, a through hole is provided inside the other side of the preheating box 1, and a filter is fixedly installed between the end of the through hole and the inner wall of the preheating box 1. The through hole is provided to facilitate the evaporation of the melamine powder inside the preheating bin 3 to the outside of the preheating box 1.

[0031] See also Figure 1 In this embodiment, guide plates are symmetrically fixedly connected to both sides of the preheating chamber 3, and the guide plates are located above the adjacent heaters 13. The guide plates are tilted to facilitate the sieved melamine powder to fall to the bottom of the preheating box 1, and the guide plates are used to prevent the melamine powder from accumulating on the top of the heater 13.

[0032] Working principle: turn on the power supply, first drive the rolling roller 5 on the surface of the rotating shaft 4 through the driving motor on the back side of the preheating box 1 to rotate, pour the melamine powder to be preheated into the inside of the crushing bin 2 through the feed hopper 102, and squeeze and crush the agglomerated melamine powder through the second protrusion 501 on the surface of the rolling roller 5 and the first protrusion 201 on the inner wall of the crushing bin 2. At the same time, the multiple stainless steel balls 503 inside the rolling roller 5 irregularly impact the inner wall of the rolling roller 5 to cause vibration inside the rolling roller 5 to prevent some wet melamine powder from adhering to the surface of the rolling roller 5. The crushed melamine powder falls on the surface of the screening plate 7, and the output end of the servo motor 10 drives the auger rod 9 to rotate. The convex surface of the cam 901 at the lower end of the auger rod 9 rotates, intermittently pressing and pushing one end of the T-shaped movable rod 1201, so that the inclined surface of the trapezoidal block 1203 at the other end of the T-shaped movable rod 1201 The surface squeezes and pushes the roller 1206 at the bottom of the push rod 1205, causing the push rod 1205 to move upward. At this time, the first return spring 1103 is squeezed and contracted, and the push rod 1205 pushes one end of the screening plate 7 to deflect upward. When the convex surface of the cam 901 does not press one end of the T-shaped movable rod 1201, the first return spring 1103 pushes the pressing block 1102 to press the top of the screening plate 7, causing one end of the screening plate 7 to deflect downward. Under the repeated pressure of the convex surface of the cam 901, one end of the screening plate 7 swings up and down and shakes, thereby screening the melamine powder on the surface of the screening plate 7. The large-particle agglomerated melamine powder passes through the first through groove 101 to the inside of the sleeve 8, and is pushed to the top of the sleeve 8 through the rotation of the auger rod 9, and then falls into the feed hopper 102 through the connecting pipe 801 for crushing and grinding again until it is completely crushed. The crushed melamine powder is preheated and dried by the heater 13. The contents not described in detail in this specification belong to the prior art known to professionals in this field.

[0033] Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art may still modify the technical solutions described in the aforementioned embodiments, or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention shall be included in the protection scope of the present invention.

Claims

1. A preheating device for melamine powder production, comprising: A preheating box (1), characterized in that: a crushing bin (2) is provided at the upper end of the preheating box (1), a preheating bin (3) is provided at the lower end of the preheating box (1), and the top of the preheating bin (3) is connected to the bottom of the crushing bin (2), a rotating shaft (4) is rotatably installed in the crushing bin (2) in the horizontal direction, and a rolling roller (5) is fixedly installed on the surface of the rotating shaft (4), and a plurality of first protrusions (201) are provided on one side of the inner wall of the crushing bin (2); A first through slot (101) is provided on one side of the preheating box (1), a fixing block (6) is fixedly connected to the inner wall of the preheating chamber (3), a screen plate (7) is hingedly mounted on the surface of the fixing block (6), and one end of the screen plate (7) extends to the outside of the preheating box (1) through the first through slot (101); A feed hopper (102) is fixedly mounted on the top of the preheating box (1), a sleeve (8) is fixedly mounted on one side of the preheating box (1), and a connecting pipe (801) is fixedly connected to one side of the upper end of the sleeve (8), one end of the connecting pipe (801) is arranged above the feed hopper (102), a second through slot (802) is opened on one side of the lower end of the sleeve (8), one end of the sieve plate (7) is arranged inside the second through slot (802), an auger rod (9) is rotatably mounted vertically inside the sleeve (8), a servo motor (10) is fixedly mounted on one side of the preheating box (1), and the output end of the servo motor (10) is fixedly connected to the bottom of the auger rod (9), and a cam (901) is fixedly mounted on the surface of the lower end of the auger rod (9); A pressing component (11) is arranged on the top of the preheating bin (3), and the bottom of the pressing component (11) is placed on the surface of the top of the sieve plate (7); a pushing component (12) is arranged inside one side of the preheating box (1), and one end of the pushing component (12) is arranged below the sieve plate (7); and a heater (13) is symmetrically fixedly mounted on the inner wall of the preheating bin (3).

2. A preheating device for melamine powder production according to claim 1, characterized in that: The surface of the rolling roller (5) is provided with a plurality of second protrusions (501) distributed at equal intervals, and the second protrusions (501) cooperate with the first protrusions (201) on one side of the inner wall of the crushing bin (2); the interior of the rolling roller (5) has a cavity (502), and a plurality of stainless steel balls (503) of the same size are placed inside the cavity (502).

3. A preheating device for melamine powder production according to claim 1, characterized in that: The pressing assembly (11) comprises: a fixing rod (1101), the fixing rod (1101) is fixedly mounted on the top of the preheating bin (3), a pressing block (1102) is movably mounted on the lower end of the fixing rod (1101), and the bottom of the pressing block (1102) is placed on the surface of one end of the screening plate (7), a first return spring (1103) is mounted on the surface of the fixing rod (1101), and one end of the first return spring (1103) is fixedly connected to the surface of the top of the preheating bin (3), and the other end of the first return spring (1103) is fixedly connected to the top of the pressing block (1102).

4. The preheating device for melamine powder production according to claim 1, characterized in that: The pushing assembly (12) comprises: a T-shaped movable rod (1201) and a supporting block (1204); the T-shaped movable rod (1201) is movably inserted into the interior of one side of the preheating box (1); one end of the T-shaped movable rod (1201) is located on one side of the cam (901); a second return spring (1202) is sleeved on the surface of one end of the T-shaped movable rod (1201); one end of the second return spring (1202) is fixedly connected to one end of the T-shaped movable rod (1201); and the other end of the second return spring (1202) is fixedly connected to the preheating box (1). The hot box (1) is fixedly connected to the surface of the hot box (1), the other end of the T-shaped movable rod (1201) is fixedly connected to a trapezoidal block (1203), the support block (1204) is fixedly connected to the inner wall of the preheating chamber (3), a push rod (1205) is movably inserted in the vertical direction inside the support block (1204), and a roller (1206) is movably installed at the bottom of the push rod (1205), the bottom of the roller (1206) is mounted on the surface of the trapezoidal block (1203), and the top of the push rod (1205) is located at the bottom of one end of the screening plate (7).

5. The preheating device for melamine powder production according to claim 1, characterized in that: A through hole is provided inside the other side of the preheating box (1), and a filter is fixedly installed between the end of the through hole and the inner wall of the preheating box (1).

6. A preheating device for melamine powder production according to claim 1, characterized in that: Guide plates are symmetrically fixedly connected to both sides of the preheating chamber (3), and the guide plates are located above the adjacent heaters (13).

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