Crushing device for PVC additive production

Abstract

The utility model discloses a crushing device for PVC (polyvinyl chloride) additive production, which comprises a crushing subassembly and a grinding subassembly which are arranged up and down, the crushing subassembly comprises two upper extrusion rollers arranged on the upper side in a crushing subassembly shell and two lower extrusion rollers arranged on the lower side in the crushing subassembly shell; the outer ends of the upper extrusion roller rotating shafts are provided with upper transmission gears respectively, the two upper transmission gears are in meshing transmission, the outer ends of the lower extrusion roller rotating shafts are provided with lower transmission gears respectively, the two lower transmission gears are in meshing transmission, and a driving gear is arranged between the upper transmission gear on the right side and the lower transmission gear on the right side. The upper side of the driving gear is in meshing transmission with the upper transmission gear, and the lower side of the driving gear is in meshing transmission with the lower transmission gear. Power is provided through gear transmission, so that the transmission efficiency is high, and the crushing effect is good; the grinding machine can be suitable for raw materials with different particle sizes, and the particle sizes of the ground raw materials are smaller.

Description

Technical Field

[0001] This utility model relates to a pulverizing device for PVC additive production, belonging to the field of PVC additive production pulverizing technology. Background Technology

[0002] Polyvinyl chloride (PVC) is a widely used general-purpose plastic, holding an irreplaceable position in the fields of chemical building materials, chemical corrosion protection, and daily consumer goods. However, PVC has poor melt extensibility, which easily leads to melt breakage; PVC melt relaxation is slow, which easily results in rough, dull, and sharkskin-like surfaces on finished products. Therefore, processing aids are often added during PVC processing to improve these defects in the melt.

[0003] In the production process of PVC additives, a variety of solid raw materials are used. During production, the raw materials need to be crushed and mixed before being sent to the reactor for heating to produce PVC additives. Chinese utility model patent with announcement number CN211801146U discloses a pulverizer for PVC additives. By using a combination of a preliminary crushing roller and a fine crushing roller, the effect of more thorough crushing of PVC additives is achieved.

[0004] However, the aforementioned patented solution has the following drawbacks in the raw material crushing process:

[0005] First, the transmission systems of the primary crushing roller and the fine crushing roller are complex, and during the crushing process, when crushing is carried out by belt drive, the belt is prone to slippage when the raw material is hard.

[0006] Secondly, simply crushing the particles by the primary crushing roller and the fine crushing roller is insufficient to achieve the required particle size.

[0007] In conclusion, the existing technology obviously has inconveniences and defects in practical use, so it is necessary to improve it. Utility Model Content

[0008] This utility model addresses the shortcomings of the prior art by providing a pulverizing device for PVC additive production. It provides power through gear transmission, resulting in high transmission efficiency and good pulverizing effect. It can be used for raw materials with different particle sizes, and the particle size of the raw materials is made smaller after grinding.

[0009] To solve the above technical problems, the present invention adopts the following technical solution:

[0010] A pulverizing device for producing PVC additives includes a crushing section and a grinding section arranged vertically. The crushing section includes two upper extrusion rollers disposed on the upper side inside the shell of the crushing section, and two lower extrusion rollers disposed on the lower side inside the shell of the crushing section.

[0011] Upper drive gears are installed on the outer ends of the upper extrusion roller shafts, and the two upper drive gears mesh with each other for transmission. Lower drive gears are installed on the outer ends of the lower extrusion roller shafts, and the two lower drive gears mesh with each other for transmission. A drive gear is provided between the upper drive gear on the right side and the lower drive gear on the right side. The upper side of the drive gear meshes with the upper drive gear for transmission, and the lower side of the drive gear meshes with the lower drive gear for transmission.

[0012] Furthermore, the extrusion gap between the two lower extrusion rollers is smaller than the extrusion gap between the two upper extrusion rollers.

[0013] Furthermore, baffles are provided on both sides of the crushing section housing, located between the upper and lower extrusion rollers, and a feed inlet is provided at the upper end of the crushing section housing.

[0014] Furthermore, the grinding unit includes a stationary grinding disc and a moving grinding disc that rotate and cooperate with each other. The stationary grinding disc is mounted on the upper housing of the grinding unit, and a rotating shaft is fixed to the lower end of the moving grinding disc.

[0015] Furthermore, the lower end of the grinding unit is provided with a support frame, the lower end of the support frame is equipped with a support leg, a fixed sleeve is installed inside the support frame, and the rotating shaft is rotatably installed in the fixed sleeve through a first bearing.

[0016] Furthermore, a mounting disc is provided at the top of the rotating shaft. The upper end of the mounting disc is fixedly connected to the moving grinding disc, and the lower end is mounted on the top of the fixed sleeve through a second bearing.

[0017] Furthermore, a passive helical gear is fixed at the lower end of the rotating shaft. The passive helical gear meshes with the active helical gear to drive the rotating shaft to rotate relative to the fixed sleeve.

[0018] Furthermore, multiple material feeding plates are fixed around the lower side of the moving grinding disc, and an annular material storage trough is also fixed to the support frame. The material feeding plates are set in the material storage trough, and a material discharge port is provided at the bottom of the material storage trough. A material discharge pipe is provided at the material discharge port.

[0019] Furthermore, a sliding rod is vertically fixed around the upper end of the stationary grinding disc, and a spring is fitted on the sliding rod. The top of the sliding rod is slidably mounted on the grinding part housing.

[0020] Compared with the prior art, the present invention, by adopting the above technical solution, has the following advantages:

[0021] 1. The crushing unit includes two upper extrusion rollers and two lower extrusion rollers; the two lower extrusion rollers further extrude and crush the raw material, and the crushing effect is better through two-stage extrusion and crushing; the two upper extrusion rollers and the two lower extrusion rollers are powered by gear transmission, which makes the transmission efficiency high and the crushing effect good.

[0022] 2. The grinding unit includes a stationary grinding disc and a moving grinding disc. A sliding rod is vertically fixed around the upper end of the stationary grinding disc, and a spring is fitted onto the sliding rod. The top of the sliding rod is slidably mounted on the upper housing of the grinding unit. When the particle size to be ground is large, the stationary grinding disc slides upward, thus accommodating raw materials of different particle sizes and making the particle size of the raw materials smaller after grinding.

[0023] The present invention will now be described in detail with reference to the accompanying drawings and embodiments. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the internal structure of this utility model;

[0025] Figure 2 This is a schematic diagram of the external gear transmission structure of the crushing part of this utility model.

[0026] In the diagram, 1-crushing section housing, 2-feed inlet, 3-upper extrusion roller, 4-lower extrusion roller, 5-baffle plate, 6-stationary grinding disc, 7-moving grinding disc, 8-grinding section housing, 9-sliding rod, 10-push plate, 11-storage trough, 1101-discharge port, 12-discharge pipe, 13-rotating shaft, 1301-mounting disc, 14-fixed sleeve, 15-first bearing, 16-second bearing, 17-driving helical gear, 18-passive helical gear, 19-upper transmission gear, 20-lower transmission gear, 21-driving gear. Detailed Implementation

[0027] To provide a clearer understanding of the technical features, objectives, and effects of this utility model, the specific embodiments of this utility model are now described with reference to the accompanying drawings.

[0028] like Figure 1 As shown, this utility model provides a crushing device for PVC additive production, including a crushing section and a grinding section arranged vertically. The crushing section includes two upper extrusion rollers 3 disposed on the upper side inside the crushing section housing 1, and two lower extrusion rollers 4 disposed on the lower side inside the crushing section housing 1.

[0029] like Figure 2 The outer ends of the upper extrusion roller 3 shaft are respectively equipped with upper drive gears 19, and the two upper drive gears 19 mesh with each other for transmission. The outer ends of the lower extrusion roller 4 shaft are respectively equipped with lower drive gears 20, and the two lower drive gears 20 mesh with each other for transmission. A drive gear 21 is provided between the upper drive gear 19 on the right side and the lower drive gear 20 on the right side. The upper side of the drive gear 21 meshes with the upper drive gear 19 for transmission, and the lower side of the drive gear 21 meshes with the lower drive gear 20 for transmission.

[0030] The extrusion gap between the two lower extrusion rollers 4 is smaller than the extrusion gap between the two upper extrusion rollers 3. The two upper extrusion rollers 3 perform preliminary extrusion and crushing on the raw material, while the two lower extrusion rollers 4 further extrude and crush the raw material. Through two-stage extrusion and crushing, the crushing effect is better.

[0031] Inside the crushing section housing 1, baffles 5 are provided on both sides between the upper extrusion roller 3 and the lower extrusion roller 4, and a feed inlet 2 is provided at the upper end of the crushing section housing 1.

[0032] The grinding unit includes a stationary grinding disc 6 and a moving grinding disc 7 that rotate and cooperate with each other. The stationary grinding disc 6 is mounted on the upper housing 8 of the grinding unit, and the lower end of the moving grinding disc 7 is fixed with a rotating shaft 13.

[0033] The lower end of the grinding unit is provided with a support frame, the lower end of the support frame is equipped with a support leg, and a fixed sleeve 14 is installed inside the support frame. The rotating shaft 13 is rotatably installed in the fixed sleeve 14 through the first bearing 15.

[0034] The top of the rotating shaft 13 is provided with a mounting disc 1301. The upper end of the mounting disc 1301 is fixedly connected to the moving grinding disc 7, and the lower end is mounted on the top of the fixed sleeve 14 through the second bearing 16.

[0035] A passive helical gear 18 is fixed at the lower end of the rotating shaft 13. The passive helical gear 18 meshes with the active helical gear 17 to drive the rotating shaft 13 to rotate relative to the fixed sleeve 14.

[0036] Multiple material-pushing plates 10 are fixed around the lower periphery of the moving grinding disc 7, and an annular storage trough 11 is also fixed to the support frame. The material-pushing plates 10 are disposed in the storage trough 11, and a discharge port 1101 is provided at the bottom of the storage trough 1101, with a discharge pipe 12 at the discharge port 1101. After the stationary grinding disc 6 and the moving grinding disc 7 grind the raw material, it falls into the storage trough 11. The material-pushing plates 10 rotate with the moving grinding disc 7, discharging the ground raw material from the discharge pipe 12.

[0037] A sliding rod 9 is vertically fixed around the upper end of the stationary grinding disc 6. A spring is fitted onto the sliding rod 9, and the top of the sliding rod 9 is slidably mounted on the grinding part housing 8. When the particle size to be ground is large, the stationary grinding disc 6 slides upward, thus making it suitable for raw materials of different particle sizes.

[0038] The specific working principle of this utility model:

[0039] This utility model includes a crushing unit and a grinding unit arranged vertically. The crushing unit includes two upper extrusion rollers 3 and two lower extrusion rollers 4. The two lower extrusion rollers 4 further crush and grind the raw material. Through two-stage crushing and grinding, the crushing effect is better. The two upper extrusion rollers 3 and the two lower extrusion rollers 4 are powered by gear transmission, which makes the transmission efficiency high and the crushing effect good.

[0040] The grinding unit includes a stationary grinding disc 6 and a moving grinding disc 7. A sliding rod 9 is vertically fixed around the upper end of the stationary grinding disc 6, and a spring is fitted on the sliding rod 9. The top of the sliding rod 9 is slidably mounted on the grinding unit housing 8. When the particle size to be ground is large, the stationary grinding disc 6 slides upward, thus making it suitable for raw materials of different particle sizes, and making the particle size of the raw materials smaller after grinding.

[0041] The above description provides examples of the preferred embodiments of this utility model. Any aspects not detailed herein are common knowledge to those skilled in the art. The scope of protection of this utility model is determined by the claims. Any equivalent modifications based on the technical teachings of this utility model are also within the scope of protection of this utility model.

Claims

1. A crushing device for PVC aid production, characterized in that: The crusher part and the grinding part are arranged in up-down direction, the crusher part includes two upper extrusion rollers (3) arranged on the upper side of the crusher part shell (1) and two lower extrusion rollers (4) arranged on the lower side of the crusher part shell (1); The outer end of the rotating shaft of the upper extrusion roller (3) is provided with an upper transmission gear (19), the two upper transmission gears (19) are in meshing transmission with each other, the outer end of the rotating shaft of the lower extrusion roller (4) is provided with a lower transmission gear (20), the two lower transmission gears (20) are in meshing transmission with each other, and the right upper transmission gear (19) and the right lower transmission gear (20) are provided with a driving gear (21) therebetween, the upper side of the driving gear (21) is in meshing transmission with the upper transmission gear (19), and the lower side of the driving gear (21) is in meshing transmission with the lower transmission gear (20). The grinding part includes a static grinding disc (6) and a dynamic grinding disc (7) in rotating cooperation, the static grinding disc (6) is arranged on the upper shell (8) of the grinding part, and the lower end of the dynamic grinding disc (7) is fixed with a rotating shaft (13). The upper end of the static grinding disc (6) is fixed with a sliding rod (9) in a vertical circle, a spring is sleeved on the sliding rod (9), and the top of the sliding rod (9) is slidingly arranged on the upper shell (8) of the grinding part.

2. The crushing device for PVC auxiliary agent production according to claim 1, characterized in that: The extrusion gap between the two lower extrusion rollers (4) is smaller than the extrusion gap between the two upper extrusion rollers (3).

3. The crushing device for PVC auxiliary agent production according to claim 1, characterized in that: The positions between the upper extrusion rollers (3) and the lower extrusion rollers (4) on the two sides in the crusher part shell (1) are further provided with material blocking plates (5), and the upper end of the crusher part shell (1) is provided with a feeding port (2).

4. The crushing device for PVC auxiliary agent production according to claim 1, characterized in that: The lower end of the grinding part is provided with a support frame, the lower end of the support frame is provided with a support leg, a fixing sleeve (14) is arranged in the support frame, and the rotating shaft (13) is rotatably arranged in the fixing sleeve (14) through a first bearing (15).

5. The crushing device for PVC auxiliary agent production according to claim 4, characterized in that: The top of the rotating shaft (13) is provided with a mounting disc (1301), the upper end of the mounting disc (1301) is fixedly connected with the dynamic grinding disc (7), and the lower end of the mounting disc (1301) is arranged on the top of the fixing sleeve (14) through a second bearing (16).

6. The crushing device for PVC auxiliary agent production according to claim 5, characterized in that: The lower end of the rotating shaft (13) is fixed with a driven helical gear (18), the driven helical gear (18) is in meshing transmission with a driving helical gear (17), so as to drive the rotating shaft (13) to rotate relative to the fixing sleeve (14).

7. The crushing device for PVC auxiliary agent production according to claim 6, characterized in that: A plurality of material pushing plates (10) are fixed on the periphery of the lower side of the dynamic grinding disc (7), the support frame is further provided with an annular material storage groove (11), the material pushing plates (10) are arranged in the material storage groove (11), the bottom of the material storage groove (11) is provided with a material leakage port (1101), and the material leakage port (1101) is provided with a material discharge pipe (12).

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