Particle screening device for asphalt concrete production

Abstract

The utility model relates to the technical field of screening devices, and discloses a particle screening device for asphalt concrete production, which comprises an equipment main body, a screening mechanism, a first mounting mechanism, a first adjusting mechanism, a second adjusting mechanism, a third adjusting mechanism and a second mounting mechanism, the inner wall of the side face of the equipment body is movably connected with the side face of the first mounting mechanism, and the side face of the first adjusting mechanism is movably connected with the side face of the first mounting mechanism. The second sieve plate is installed in the first sieve plate, the sieve holes in the surface of the first sieve plate and the sieve holes in the surface of the second sieve plate are the same in specification, the threaded rod is driven to rotate through the second adjusting mechanism according to use requirements, and the second sieve plate is driven to move out along the movable groove through threads; and the size of a screen mesh of the screening mechanism is adjusted, so that screening of mineral aggregates of different specifications is met, and the flexibility and practicability of the equipment are improved advantageously.

Description

Technical Field

[0001] The utility model relates to the technical field of screening devices, and more specifically to a particle screening device for asphalt concrete production. Background Art

[0002] Asphalt concrete is a commonly used road and paving material, which is a mixture of asphalt and mineral aggregates (such as sand, gravel and crushed stone). Because of its high strength, durability, water resistance, easy maintenance and high surface flatness, it is widely used in roads, airport runways, parking lots, sidewalks and other places that need to bear the load of vehicles and pedestrians. In the process of asphalt concrete processing, in order to ensure the quality of the finished product, the particle size of the mineral aggregate crushed stone needs to meet the standard, so it is necessary to use a particle screening device to screen the mineral aggregate particles.

[0003] Insufficient existing technology: the screen is easily impacted and worn by materials, especially under long-term and high-load operation. Therefore, the screen needs to be checked and replaced regularly. The existing screen is installed and fixed by bolts during use, and the maintenance work is relatively cumbersome. In addition, the mesh size on the screen is fixed, and it is impossible to adjust different pairs of screen holes according to usage requirements to screen and output different ore aggregate particles. Utility Model Content

[0004] In order to overcome the above-mentioned defects of the prior art, the utility model provides a particle screening device for asphalt concrete production to solve the problems existing in the above-mentioned background technology.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: A particle screening device for asphalt concrete production, comprising an equipment body, and also comprising: a screening mechanism, a first mounting mechanism, a first adjusting mechanism, a second adjusting mechanism, a third adjusting mechanism and a second mounting mechanism, the side inner wall of the equipment body is movably connected to the side of the first mounting mechanism, the side of the first adjusting mechanism is movably connected to the side of the first mounting mechanism, the side of the first mounting mechanism is movably connected to the side of the screening mechanism, the side of the second adjusting mechanism is movably connected to the side of the screening mechanism, the side of the second mounting mechanism is movably connected to the side of the equipment body, and the side of the third adjusting mechanism is movably connected to the side of the second mounting mechanism. The screening mechanism comprises a first sieve plate, a movable groove is provided on the side inner wall of the first sieve plate, the side of the movable groove is movably connected to the second sieve plate, a threaded rod is movably connected to the side of the second sieve plate, the side of the second adjusting mechanism is movably connected to the side of the first sieve plate, the side of the threaded rod is threadedly connected to the side of the second sieve plate, the side of the second adjusting mechanism is movably connected to the side of the first sieve plate, the side of the threaded rod is provided with a first hexagonal slot corresponding to the position of the second adjusting mechanism, and the side of the first hexagonal slot is meshed with the side of the second adjusting mechanism.

[0006] Furthermore, the equipment body includes a casing, the top of which is fixedly connected to a discharge hopper, the side inner wall of the casing is movably connected to a mounting frame via a pin, the side of the mounting frame is movably connected to the side of a first mounting mechanism, the side of the first mounting mechanism is movably connected to the side of a first sieve plate, the side inner wall of the casing is fixedly connected to a servo motor, the output shaft of the servo motor is fixedly connected to a turntable, the side of the turntable is movably connected to a transmission rod via a pin, the top of the transmission rod is movably connected to the side of a second mounting mechanism, the side of the second mounting mechanism is movably connected to the side of the first sieve plate, and the side of the casing is fixedly connected to a discharge hopper at a position corresponding to the first sieve plate.

[0007] Furthermore, a material baffle plate is fixedly connected to the top of the first sieve plate, a material collection bin is fixedly connected to the bottom of the first sieve plate, a material guide groove is fixedly connected to the bottom inner wall of the casing, and a through groove is provided at the bottom of the material collection bin corresponding to the position of the material guide groove.

[0008] Furthermore, the structures of the second adjusting mechanism and the third adjusting mechanism are the same as those of the first adjusting mechanism, and the structures of the second mounting mechanism are the same as those of the first mounting mechanism. The first mounting mechanism includes a mounting shaft, and the side surface of the mounting shaft is movably sleeved with the side surface of the mounting frame, and a cavity is provided inside the mounting shaft, and a mounting rod is floatingly sleeved on the side surface of the cavity, and a mounting plate is fixedly sleeved on the side surface of the mounting rod, and the side surface of the mounting plate is movably connected to a support rod through a pin, and the side surface of the support rod is movably connected to a fixing pin through a pin, and a mounting hole is provided on the side surface of the first sieve plate corresponding to the position of the mounting shaft, and a fixing ring groove is provided on the side surface of the mounting hole corresponding to the position of the fixing pin.

[0009] Furthermore, a first arc angle is formed on a side surface of the installation shaft, and a second arc angle is formed on a side surface of the fixing pin.

[0010] Furthermore, a mounting groove is provided on the side of the mounting shaft, and the first adjusting mechanism includes a knob, the side of the mounting groove is movably connected to the side of the knob, the inner wall of the side of the knob is fixedly connected to a connecting rod, and the side of the connecting rod is fixedly connected to a fixed clamping tooth, a fixed tooth groove is provided on the side of the mounting shaft corresponding to the position of the fixed clamping tooth, the side of the fixed tooth groove is meshed with the side of the fixed clamping tooth, the side of the fixed clamping tooth is fixedly connected with a hexagonal clamping block, and a second hexagonal clamping groove is provided on the side of the mounting rod, and the side of the second hexagonal clamping groove is meshed with the side of the hexagonal clamping block.

[0011] Furthermore, a mounting ring is movably sleeved on the inner wall of the side of the knob, a tension spring is fixedly connected to the side of the mounting ring, and a side of the tension spring is fixedly connected to the side of the mounting shaft.

[0012] Technical effects and advantages of the utility model:

[0013] 1. The utility model is installed inside the first sieve plate through the second sieve plate, and the sieve holes on the surface of the first sieve plate are of the same specification as the sieve holes on the surface of the second sieve plate. According to the use requirements, the threaded rod is driven to rotate through the second adjusting mechanism, and the second sieve plate is driven to move out along the movable groove through the thread, so that the sieve holes on the surface of the second sieve plate are staggered with the sieve holes on the surface of the first sieve plate, and the size of the sieve of the screening mechanism is adjusted to meet the screening of mineral aggregates of different specifications, which is conducive to improving the flexibility and practicality of the equipment.

[0014] 2. The utility model drives the mounting rod to rotate through the first adjusting mechanism to rotate the mounting plate, thereby causing the support rod to rotate along the pin on the side of the mounting plate, pushing the fixing pin to extend out of the mounting shaft and insert into the fixed ring groove, fixing the mounting shaft in the mounting hole, and completing the assembly of the screening mechanism. During disassembly, the first adjusting mechanism is rotated in the opposite direction to retract the fixing pin into the mounting shaft, and the mounting shaft can be removed. Similarly, the transmission rod and the first screen plate are connected through the third adjusting mechanism and the second mounting mechanism, which is convenient for disassembly and maintenance, and is conducive to improving work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the overall internal structure of the utility model;

[0016] Figure 2 This is a schematic diagram of the screening mechanism structure of the utility model;

[0017] Figure 3 This is a schematic diagram of the first screen plate structure of the utility model;

[0018] Figure 4 It is a cross-sectional structural diagram of the second adjusting mechanism of the utility model;

[0019] Figure 5 This is a schematic diagram of the cross-sectional structure of the first screen plate of the utility model;

[0020] Figure 6 This is a schematic diagram of the first installation mechanism structure of the utility model;

[0021] Figure 7 This is a schematic diagram of the internal structure of the first installation mechanism of the utility model;

[0022] Figure 8 This is a schematic diagram of the knob structure of the utility model.

[0023] The accompanying drawings are marked as follows: 1. Equipment body; 101. Casing; 102. Discharging hopper; 103. Mounting frame; 104. Discharging hopper; 105. Guide trough; 106. Transmission rod; 107. Servo motor; 108. Turntable; 2. Screening mechanism; 201. First sieve plate; 202. Baffle plate; 203. Aggregate bin; 204. Mounting hole; 205. Fixed ring groove; 206. Second sieve plate; 207. Threaded rod; 208. Movable groove; 209. First hexagonal slot; 3. First mounting mechanism; 301. Mounting Axis mounting; 302, fixing pin; 303, first arc angle; 304, second arc angle; 305, mounting rod; 306, support rod; 307, mounting plate; 308, cavity; 309, second hexagonal slot; 310, fixing tooth slot; 311, mounting slot; 4, first adjustment mechanism; 401, knob; 402, mounting ring; 403, connecting rod; 404, tension spring; 405, fixing tooth; 406, hexagonal block; 5, second adjustment mechanism; 6, third adjustment mechanism; 7, second mounting mechanism. DETAILED DESCRIPTION

[0024] The technical solution of the utility model will be clearly and completely described below in conjunction with the drawings in the utility model. In addition, the forms of the various structures recorded in the following embodiments are merely illustrative. The particle screening device for asphalt concrete production involved in the utility model is not limited to the various structures recorded in the following embodiments. All other implementations obtained by ordinary technicians in this field without making creative work belong to the scope of protection of the utility model.

[0025] Reference Figures 1 to 8The utility model provides a particle screening device for asphalt concrete production. The utility model provides a particle screening device for asphalt concrete production, including a device body 1, and also including: a screening mechanism 2, a first mounting mechanism 3, a first adjusting mechanism 4, a second adjusting mechanism 5, a third adjusting mechanism 6 and a second mounting mechanism 7. The side inner wall of the device body 1 is movably connected to the side of the first mounting mechanism 3, the side of the first adjusting mechanism 4 is movably connected to the side of the first mounting mechanism 3, the side of the first mounting mechanism 3 is movably connected to the side of the screening mechanism 2, the side of the second adjusting mechanism 5 is movably connected to the side of the screening mechanism 2, the side of the second mounting mechanism 7 is movably connected to the side of the device body 1, and the side of the third adjusting mechanism 6 is movably connected to the side of the second mounting mechanism 7. The screening mechanism 2 includes a first sieve plate 201, and a movable groove 208 is opened on the side inner wall of the first sieve plate 201. The side of the movable groove 208 The second sieve plate 206 is movably connected to the surface, and the side of the first sieve plate 201 is movably connected to the threaded rod 207, the side of the threaded rod 207 is threadedly connected to the side of the second sieve plate 206, the side of the second adjusting mechanism 5 is movably connected to the side of the first sieve plate 201, and the side of the threaded rod 207 corresponding to the position of the second adjusting mechanism 5 is provided with a first hexagonal slot 209, the side of the first hexagonal slot 209 and the side of the second adjusting mechanism 5 are meshed with each other, the second sieve plate 206 is installed inside the first sieve plate 201, and the sieve holes on the surface of the first sieve plate 201 are of the same specification as the sieve holes on the surface of the second sieve plate 206. According to usage requirements, the threaded rod 207 is driven to rotate by the second adjusting mechanism 5, and the second sieve plate 206 is driven to move out along the movable groove 208 by the thread, so that the sieve holes on the surface of the second sieve plate 206 are staggered with the sieve holes on the surface of the first sieve plate 201, and the screen size of the screening mechanism 2 is adjusted to meet the screening of mineral aggregates of different specifications.

[0026] The device body 1 includes a casing 101, a hopper 102 is fixedly connected to the top of the casing 101, a mounting frame 103 is movably connected to the inner wall of the side of the casing 101 through a pin, the side of the mounting frame 103 is movably connected to the side of the first mounting mechanism 3, the side of the first mounting mechanism 3 is movably connected to the side of the first sieve plate 201, a servo motor 107 is fixedly connected to the inner wall of the side of the casing 101, the output shaft of the servo motor 107 is fixedly connected to a turntable 108, the side of the turntable 108 is movably connected to a transmission rod 106 through a pin, the top of the transmission rod 106 is movably connected to the side of the second mounting mechanism 7, the side of the second mounting mechanism 7 is movably connected to the first sieve plate The side of 201 is movably sleeved, and the side of the casing 101 is fixedly connected with a discharge hopper 104 corresponding to the position of the first sieve plate 201. When in use, the mineral aggregates to be screened are poured into the discharge hopper 102 and fall into the top of the first sieve plate 201 under the action of gravity. The servo motor 107 drives the turntable 108 to rotate, so that the transmission rod 106 pushes the first sieve plate 201, and the mounting frame 103 rotates along the pin at the top. The first sieve plate 201 rotates along the first mounting mechanism 3, so that the first sieve plate 201 is continuously shaken, so that the mineral aggregates roll along the surface of the first sieve plate 201, and the small ones pass through the sieve holes and fall down, and the large ones roll along the surface of the first sieve plate 201 to the discharge hopper 104 for discharge.

[0027] Among them, the top of the first sieve plate 201 is fixedly connected with a baffle plate 202, the bottom of the first sieve plate 201 is fixedly connected with a collection bin 203, the bottom inner wall of the casing 101 is fixedly connected with a material guide groove 105, and a through groove is opened at the bottom of the collection bin 203 corresponding to the position of the material guide groove 105. The baffle plate 202 facilitates the mineral aggregate to fall from the side of the first sieve plate 201, and the mineral aggregate passing through the sieve hole falls into the interior of the collection bin 203, and then falls into the material guide groove 105 through the through groove for discharge.

[0028] Among them, the structures of the second adjustment mechanism 5 and the third adjustment mechanism 6 are the same as those of the first adjustment mechanism 4, and the structure of the second mounting mechanism 7 is the same as that of the first mounting mechanism 3. The first mounting mechanism 3 includes a mounting shaft 301, and the side of the mounting shaft 301 is movably sleeved with the side of the mounting frame 103, and a cavity 308 is provided inside the mounting shaft 301. A mounting rod 305 is floatingly sleeved on the side of the cavity 308, and a mounting plate 307 is fixedly sleeved on the side of the mounting rod 305. The side of the mounting plate 307 is movably connected to a support rod 306 through a pin, and the side of the support rod 306 is movably connected to a fixing pin 302 through a pin. A mounting hole 204 is provided on the side of the first sieve plate 201 corresponding to the position of the mounting shaft 301, and the mounting hole 208 is provided on the side of the first sieve plate 201. A fixing annular groove 205 is provided on the side of 04 corresponding to the position of the fixing pin 302. When installing the screening mechanism 2, the mounting shaft 301 is inserted into the mounting hole 204, and the mounting rod 305 is driven to rotate by the first adjusting mechanism 4 to rotate the mounting plate 307, so that the support rod 306 rotates along the pin on the side of the mounting plate 307, pushing the fixing pin 302 to extend out of the mounting shaft 301 and insert into the fixing annular groove 205, fixing the mounting shaft 301 in the mounting hole 204, and completing the assembly of the screening mechanism 2. When disassembling, the first adjusting mechanism 4 is rotated in the opposite direction to retract the fixing pin 302 into the mounting shaft 301, and the mounting shaft 301 can be removed. Similarly, the transmission rod 106 and the first screen plate 201 are connected through the third adjusting mechanism 6 and the second mounting mechanism 7.

[0029] The side surface of the installation shaft 301 is provided with a first arc corner 303 , and the side surface of the fixing pin 302 is provided with a second arc corner 304 .

[0030] The side of the mounting shaft 301 is provided with a mounting groove 311, the first adjustment mechanism 4 includes a knob 401, the side of the mounting groove 311 is movably connected to the side of the knob 401, the inner wall of the side of the knob 401 is fixedly connected to a connecting rod 403, the side of the connecting rod 403 is fixedly connected to a fixed clamping tooth 405, the side of the mounting shaft 301 is provided with a fixed tooth groove 310 corresponding to the position of the fixed clamping tooth 405, the side of the fixed tooth groove 310 is meshed with the side of the fixed clamping tooth 405, the side of the fixed clamping tooth 405 is fixedly connected to a hexagonal clamping block 406, and the side of the mounting rod 305 is provided with There is a second hexagonal slot 309, and the side of the second hexagonal slot 309 is meshed with the side of the hexagonal block 406. When the first mounting mechanism 3 needs to be adjusted, the knob 401 is pulled outward to move the fixed tooth 405 out of the fixed tooth groove 310, and the knob 401 is turned to drive the hexagonal block 406 to rotate. The hexagonal block 406 is always meshed with the second hexagonal slot 309 to drive the mounting rod 305 to rotate. After the adjustment is completed, the knob 401 is pushed to insert the fixed tooth 405 into the fixed tooth groove 310, and the knob 401 is fixed, thereby achieving the fixation of the first mounting mechanism 3.

[0031] Among them, the inner wall of the side of the knob 401 is movably sleeved with a mounting ring 402, and the side of the mounting ring 402 is fixedly connected with a tension spring 404, and the side of the tension spring 404 is fixedly connected to the side of the mounting shaft 301. After the adjustment is completed, the tension spring 404 pulls the mounting ring 402 to make the knob 401 close to the mounting shaft 301, so that the fixed tooth 405 is automatically inserted into the fixed tooth groove 310. When the inside of the knob 401 is rotated, the mounting ring 402 rotates along the inner wall of the side of the knob 401 to avoid deformation of the tension spring 404.

[0032] The working principle of the utility model is as follows: when the screening mechanism 2 is disassembled and maintained, the knob 401 is pulled outward to make the fixed tooth 405 move out of the fixed tooth groove 310, and the knob 401 is turned to drive the hexagonal block 406 to rotate, and the hexagonal block 406 is always meshed with the second hexagonal groove 309 to drive the installation rod 305 to rotate, and the installation disk 307 is rotated, so that the support rod 306 rotates along the pin on the side of the installation disk 307, driving the fixed pin 302 to move toward the inside of the installation shaft 301 and move out of the fixed ring groove 205 to be collected in the installation shaft. 301, pull the mounting shaft 301 out of the mounting hole 204, then loosen the knob 401, the tension spring 404 pulls the mounting ring 402 to make the knob 401 close to the mounting shaft 301, so that the fixing tooth 405 is automatically inserted into the fixing tooth groove 310, and the first mounting mechanism 3 is fixed. At the same time, the second mounting mechanism 7 is adjusted by the third adjustment mechanism 6 to separate the second mounting mechanism 7 from the first sieve plate 201. After the maintenance of the screening mechanism 2 is completed, the mounting rod 305 is rotated in the opposite direction by the first adjustment mechanism 4 to The fixing pin 302 is inserted into the fixing ring groove 205 to fix the first sieve plate 201. Similarly, the second mounting mechanism 7 is inserted into the first sieve plate 201. According to the use requirements, the threaded rod 207 is driven to rotate through the second adjustment mechanism 5, and the second sieve plate 206 is driven to move out along the movable groove 208 through the thread, so that the sieve holes on the surface of the second sieve plate 206 are staggered with the sieve holes on the surface of the first sieve plate 201. The size of the sieve mesh of the screening mechanism 2 is adjusted. When the equipment is running, the mineral aggregates to be screened are poured into the discharge hopper 102 under the action of gravity. It falls into the top of the first sieve plate 201, and the servo motor 107 drives the turntable 108 to rotate, so that the transmission rod 106 pushes the first sieve plate 201, and the mounting frame 103 rotates along the pin at the top. The first sieve plate 201 rotates along the first mounting mechanism 3, so that the first sieve plate 201 is constantly shaken, and the mineral aggregates roll along the surface of the first sieve plate 201. The small ones pass through the sieve holes and fall into the collecting bin 203 and fall into the guide trough 105 through the bottom groove for discharge. The larger ones roll along the surface of the first sieve plate 201 to the discharge hopper 104 for discharge.

[0033] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A particle screening device for asphalt concrete production, comprising a device body (1), characterized in that: Also includes: A screening mechanism (2), a first mounting mechanism (3), a first adjusting mechanism (4), a second adjusting mechanism (5), a third adjusting mechanism (6) and a second mounting mechanism (7), wherein the inner wall of the side surface of the device body (1) is movably connected to the side surface of the first mounting mechanism (3), the side surface of the first adjusting mechanism (4) is movably connected to the side surface of the first mounting mechanism (3), the side surface of the first mounting mechanism (3) is movably connected to the side surface of the screening mechanism (2), the side surface of the second adjusting mechanism (5) is movably connected to the side surface of the screening mechanism (2), the side surface of the second mounting mechanism (7) is movably connected to the side surface of the device body (1), and the side surface of the third adjusting mechanism (6) is movably connected to the side surface of the second mounting mechanism (7) The screening mechanism (2) comprises a first sieve plate (201), a movable groove (208) is provided on the inner wall of the side of the first sieve plate (201), the side of the movable groove (208) is movably connected to the second sieve plate (206), the side of the first sieve plate (201) is movably connected to a threaded rod (207), the side of the threaded rod (207) is threadedly connected to the side of the second sieve plate (206), the side of the second adjustment mechanism (5) is movably connected to the side of the first sieve plate (201), the side of the threaded rod (207) is provided with a first hexagonal groove (209) corresponding to the position of the second adjustment mechanism (5), and the side of the first hexagonal groove (209) is meshed with the side of the second adjustment mechanism (5).

2. A particle screening device for asphalt concrete production according to claim 1, characterized in that: The device body (1) comprises a casing (101), the top of which is fixedly connected to a discharge hopper (102), the side inner wall of which is movably connected to a mounting frame (103) via a pin, the side of which is movably sleeved with the side of a first mounting mechanism (3), the side of which is movably connected to the side of a first sieve plate (201), the side inner wall of which is fixedly connected to a servo motor (103) 07), the output shaft of the servo motor (107) is fixedly connected to a turntable (108), the side of the turntable (108) is movably connected to a transmission rod (106) through a pin, the top of the transmission rod (106) is movably connected to the side of the second mounting mechanism (7), the side of the second mounting mechanism (7) is movably connected to the side of the first sieve plate (201), and the side of the casing (101) is fixedly connected to a discharge hopper (104) corresponding to the position of the first sieve plate (201).

3. A particle screening device for asphalt concrete production according to claim 2, characterized in that: The top end of the first sieve plate (201) is fixedly connected to a material blocking plate (202), the bottom end of the first sieve plate (201) is fixedly connected to a material collecting bin (203), the bottom inner wall of the casing (101) is fixedly connected to a material guide groove (105), and a through groove is provided at the bottom end of the material collecting bin (203) at a position corresponding to the material guide groove (105).

4. The particle screening device for asphalt concrete production according to claim 1 is characterized in that: The structures of the second adjustment mechanism (5) and the third adjustment mechanism (6) are the same as those of the first adjustment mechanism (4); the structure of the second mounting mechanism (7) is the same as that of the first mounting mechanism (3); the first mounting mechanism (3) comprises a mounting shaft (301); the side surface of the mounting shaft (301) is movably sleeved with the side surface of the mounting frame (103); a cavity (308) is provided inside the mounting shaft (301); the side surface of the cavity (308) is floatingly sleeved with a mounting rod ( The side of the mounting rod (305) is fixedly sleeved with a mounting plate (307), the side of the mounting plate (307) is movably connected to a support rod (306) via a pin, the side of the support rod (306) is movably connected to a fixing pin (302) via a pin, a mounting hole (204) is provided on the side of the first sieve plate (201) at a position corresponding to the mounting shaft (301), and a fixing ring groove (205) is provided on the side of the mounting hole (204) at a position corresponding to the fixing pin (302).

5. A particle screening device for asphalt concrete production according to claim 4, characterized in that: The side surface of the installation shaft (301) is provided with a first arc angle (303), and the side surface of the fixing pin (302) is provided with a second arc angle (304).

6. A particle screening device for asphalt concrete production according to claim 4, characterized in that: The side surface of the installation shaft (301) is provided with an installation groove (311); the first adjustment mechanism (4) comprises a knob (401); the side surface of the installation groove (311) is movably connected to the side surface of the knob (401); the inner wall of the side surface of the knob (401) is fixedly connected to a connecting rod (403); the side surface of the connecting rod (403) is fixedly connected to a fixed clamping tooth (405); the side surface of the installation shaft (301) is provided with a fixed tooth groove (310) corresponding to the position of the fixed clamping tooth (405); the side surface of the fixed tooth groove (310) and the side surface of the fixed clamping tooth (405) are meshed with each other; the side surface of the fixed clamping tooth (405) is fixedly connected to a hexagonal clamping block (406); the side surface of the installation rod (305) is provided with a second hexagonal clamping groove (309); the side surface of the second hexagonal clamping groove (309) and the side surface of the hexagonal clamping block (406) are meshed with each other.

7. A particle screening device for asphalt concrete production according to claim 6, characterized in that: A mounting ring (402) is movably sleeved on the inner wall of the side of the knob (401), a tension spring (404) is fixedly connected to the side of the mounting ring (402), and a side of the tension spring (404) is fixedly connected to the side of the mounting shaft (301).

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