Continuous operation drum type and center stirring dual-function grinding machine

Abstract

The utility model relates to a grinding machine, in particular to a continuous operation drum-type and center stirring difunctional grinding machine, and provides a continuous operation drum-type and center stirring difunctional grinding machine. Comprising a feeding device, a roller, a sand raising plate, a central stirring shaft, paddles, a stirring shaft driving device, a roller inclination angle adjusting device, a roller driving device, a discharging device, a grinding medium separating screen and a grinding medium returning device. The feeding device feeds sand and a grinding medium into the roller, a sand raising plate is arranged on the inner wall of the roller, a center stirring shaft with blades is arranged in the center of the roller, the roller and the center stirring shaft are driven by respective driving devices to rotate in opposite directions, the sand is pushed to an upper feeding port by the blades when falling downwards, and the inclination angle of the roller is adjusted by the roller inclination angle adjusting device. The sand and the grinding medium automatically flow out of the discharging port and are separated through the grinding medium separating screen, the grinding medium returns to the feeding port to be recycled, and the grinding machine is necessary production equipment for guaranteeing the circularity quality of high-quality machine-made sand and makes up the international and domestic technical blank.

Description

TECHNICAL FIELD

[0001] The utility model relates to a kind of sand production equipment in construction industry, especially refers to continuous operation drum type and center mixing double-function sand grinder. BACKGROUND

[0002] Compared with existing standard products:

[0003] Ball mill, rod mill, stone grinder used in market are all standard products, which are key equipment for material crushing and then grinding. It is widely used in cement, silicate products, new building materials, refractory materials, chemical fertilizers, black and non-ferrous metal ore dressing and glass ceramic production industry, and is used for dry or wet grinding of various ores and other grindable materials. Ball mill is suitable for grinding various ores and other materials, and is widely used in ore dressing, building materials and chemical industry, which can be divided into dry and wet grinding modes. However, when the device is used for polishing and removing corners of machine-made sand, it has the following disadvantages:

[0004] 1) cannot operate in assembly line, as its closed structure requires grinding one bucket at a time, and cannot realize assembly line operation;

[0005] 2) speed and inclination are not adjustable, and the hardness and gradation of machine-made sand produced by the same sand plant are different. For sand with different hardness and gradation, the grinding time and speed required for removing corners are different, and traditional ball mill cannot meet the demand of grinding machine-made sand. UTILITY MODEL CONTENTS

[0006] The utility model is aimed at the sand made by existing sand making machine, which cannot meet the quality requirements of high-quality machine-made sand particle morphology due to the existence of needle-shaped and angular objects. Therefore, we have developed a new type of continuous operation drum type and center mixing double-function sand grinder, which solves the technical problem of machine-made sand particle polishing and shaping in the country first. The sand grinder is designed scientifically, with simple structure, quick installation, convenient transfer and can meet the demand of high-quality machine-made sand for making C50 and above concrete strength grade. The roundness of high-quality machine-made sand meeting the standard requirements improves the fluidity of concrete, making the concrete strength more stable.

[0007] The sand particle shaping of the utility model lays a foundation for high-quality machine-made sand, solves the market demand for lack of building sand due to environmental protection and limited natural sand mining, i.e. the technical problem of producing C50 and above concrete with high-quality machine-made sand, realizes the replacement of natural sand with machine-made sand, and fills the technical gap in international and domestic construction industry.

[0008] The utility model is realized by the following technical solutions:

[0009] The continuous operation drum type and central stirring double function sand grinding machine comprises a feeding device, a drum, a drum driving device, grinding medium, a sand lifting plate, a drum inclination angle adjusting device, a central stirring shaft, a paddle, a stirring shaft driving device, a discharging device, a grinding medium separating screen and a grinding medium returning device. The continuous operation drum type and central stirring double function sand grinding machine breaks the traditional batch production and realizes continuous production of the drum with high input and low output, and the central stirring shaft paddle stirring greatly improves the production efficiency.

[0010] The continuous operation drum type and central stirring double function sand grinding machine is characterized in that the drum is circular, the drum diameter and drum length are determined according to different rock types, centrifugal speed, output and circularity to meet the output and circularity requirements of the sand grinding machine.

[0011] The continuous operation drum type and central stirring double function sand grinding machine is characterized in that the drum driving device adopts gear and gear ring driving in the drum span, and a plurality of supporting drag pulleys are arranged on the left and right of the driving device to ensure the gear meshing gap and control the drum concentricity.

[0012] The drum driving device is characterized in that the drum speed is adjustable to adjust the balance relationship between the output and circularity and adapt to different rock types.

[0013] The continuous operation drum type and central stirring double function sand grinding machine is characterized in that the drum driving device adopts gear and gear ring driving in the drum span, and a plurality of supporting drag pulleys are arranged on the left and right of the driving device to ensure the gear meshing gap and control the drum concentricity. Drum Inclination adjusting device The drum driving device is characterized in that the drum speed is adjustable to adjust the balance relationship between the output and circularity and adapt to different rock types.

[0014] The continuous operation drum type and central stirring double function sand grinding machine is characterized in that the drum driving device adopts gear and gear ring driving in the drum span, and a plurality of supporting drag pulleys are arranged on the left and right of the driving device to ensure the gear meshing gap and control the drum concentricity.

[0015] The continuous operation drum type and central stirring double function sand grinder is characterized in that a central stirring shaft is arranged in the sand grinder drum, the central stirring shaft is supported by bearings at two ends, the central stirring shaft is composed of three sections of steel pipes with different diameters, a plurality of paddles are arranged on the shaft, the paddle surface is coated with a mixed material with strong adhesive force and abrasion resistance and high-strength small particle bodies (polyurethane / epoxy resin bonded diamond) to generate a friction effect, the composite material on the paddle and the machine-made sand are rubbed while being stirred, the corners of the machine-made sand are polished, the grinding efficiency is increased, and the grinding time is shortened.

[0016] The continuous operation drum type and central stirring double function sand grinder is characterized in that the stirring shaft driving device is driven at the high end of the sand grinder, the motor and the speed reducer are connected by a belt, the speed reducer is directly connected with the central stirring shaft, the rotating speed of the central stirring shaft is adjustable through the frequency conversion motor and the speed reducer, the belt transmission has an overload function, the central stirring shaft rotates in the opposite direction of the sand grinder drum, the sand moves relatively in the drum, sand beating is generated, needle-shaped sand is eliminated, the sand grinding effect is improved, and the grinding time is shortened.

[0017] The continuous operation drum type and central stirring double function sand grinder is characterized in that the feeding port is arranged at the center of the end face plate of the high end of the sand grinder drum, the discharging ports are arranged on the periphery of the end face plate of the low end of the sand grinder drum and are uniformly distributed, a discharging speed adjusting plate is arranged, and an environmental protection dust removal cover is arranged at the discharging device.

[0018] The continuous operation drum type and central stirring double function sand grinder is characterized in that grinding media are mixed in the sand grinder drum, the grinding media are separated by a grinding media separation screen at the discharging port, continuously returned to the feeding hopper, the proportion of the grinding media in the sand grinder drum is kept unchanged, the sand passes through the grinding media separation screen and enters the next process, and continuous production is realized.

[0019] The utility model will be further explained in detail in connection with the drawings BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 It is the front view of the sand grinder of the utility model;

[0021] Figure 2 It is the side view of the sand grinder drum of the utility model;

[0022] Figure 3 It is the local enlarged view of the sand scraping plate in the sand grinder drum of the utility model;

[0023] Figure 4 It is the front view of the sand grinder drum of the utility model;

[0024] Wherein:

[0025] 1. Feeding device; 1-1 feeding hopper, 1-2 dredging pipe.

[0026] 2. Roller; 2-1 feeding port, 2-2 supporting ring, 2-3 discharging port,

[0027] 2-4 discharging port baffle, 2-5 sanding plate.

[0028] 3. Roller driving device; 3-1 variable speed motor, 3-2 speed reducer,

[0029] 3-3 gear, 3-4 gear ring.

[0030] 4. Roller inclination angle adjusting device; 4-1 hinged support, 4-2 height adjusting bolt, 4-3 base support.

[0031] 5. Discharging device; 5-1 dust removal cover, 5-2 grinding medium separation screen, 5-3 discharging hopper,

[0032] 5-4 dust high pressure air inlet

[0033] 6. Grinding medium returning device;

[0034] 7. Stirring shaft driving device; 7-1 variable speed motor, 7-2 transmission belt, 7-3 speed reducer,

[0035] 7-4 coupling.

[0036] 8. Central stirring system; 8-1 central stirring shaft, 8-2 bearing support, 8-3 paddle,

[0037] 8-4 paddle angle adjusting bolt.

[0038] 9. Grinding medium; 9-1 ceramic grinding ball.

[0039] 10. Supporting device: 10-1 supporting wheel, 10-2 supporting base.

[0040] 11. Roller two end steel support: 11-1 central stirring shaft support, 11-2 feeding hopper support,

[0041] 11-3 dust cover support;

[0042] 12. Sand mill steel base;

[0043] 13. Sand mill foundation base; DETAILED DESCRIPTION

[0044] As Figure 1As shown, the continuous operation drum type and center stirring dual function sanding machine described in the embodiment includes a feeding device 1, a feeding hopper 1-1, a dredging pipe 1-2, a drum 2, a feeding port 2-1, a supporting ring 2-2, a discharging port 2-3, a discharging port baffle 2-4, a sanding plate 2-5, a drum driving device 3, a variable speed motor 3-1, a speed reducer 3-2, a gear 3-3, a gear ring 3-4, a drum inclination angle adjusting device 4, a hinged support 4-1, a height adjusting bolt 4-2, a foundation base 4-3,

[0045] a discharging device 5, a dust removal cover 5-1, a grinding medium separation sieve 5-2, a discharging hopper 5-3, a dust high pressure air inlet 5-4, a grinding medium returning device 6, a stirring shaft driving device 7; a variable speed motor 7-1, a transmission belt 7-2, a speed reducer 7-3, a shaft coupling 7-4, a center stirring system 8, a center stirring shaft 8-1, a bearing seat 8-2, a paddle 8-3, a paddle angle adjusting bolt 8-4, a grinding medium 9, a ceramic grinding ball 9-1, a supporting device 10, a supporting wheel 10-1, a supporting base 10-2, a drum two-end steel support 11, a center stirring shaft support 11-1, a feeding hopper support 11-2, a dust cover support 11-3, a sanding machine steel base 12, and a sanding machine foundation 13.

[0046] The feeding device 1 described in the embodiment sends sand and grinding medium 9 into the drum 2 through the feeding hopper 1-1 and the dredging pipe 1-2. The inner wall of the drum 2 is provided with a sanding plate 2-5. The center of the drum 2 is provided with a center stirring shaft system 8. The paddle 8-3 is installed on the center stirring shaft 8-1 through the paddle angle adjusting bolt 8-4. The two ends of the center stirring shaft 8-1 are positioned and supported by the bearing seat 8-2.

[0047] The drum 2 described in the embodiment is driven by the drum driving device 3. The variable speed motor 3-1 is directly connected with the speed reducer 3-2. The variable speed motor 3-1 drives the gear 3-3 and the gear ring 3-4 to rotate through the speed reducer 3-2, thereby driving the drum 2 to rotate. The transmission sequence is: variable speed motor 3-1→speed reducer 3-2→gear 3-3→gear ring 3-4→drum 2.

[0048] The center stirring shaft 8-1 described in the embodiment is driven by the stirring shaft driving device 7. The variable speed motor 7-1 and the speed reducer 7-3 are connected through the transmission belt 7-2. The speed reducer 7-3 is connected with the center stirring shaft 8-1 through the shaft coupling 7-4. The transmission sequence is: variable speed motor 7-1→transmission belt 7-2→speed reducer 7-3→shaft coupling 7-4→center stirring shaft 8-1.

[0049] As Figure 2As shown, the drum 2 described in the embodiment is opposite to the rotation direction of the central stirring shaft 8-1, and the sand is pushed by the paddle 8-3 to the high end of the drum 2 in the downward falling, which increases the length of the movement track of the sand in the drum 2, and increases the friction frequency and time. The drum inclination adjusting device 4 adjusts the length of the heightening bolt 4-2, and then adjusts the height of the hinged support 4-1, so as to realize the function of adjusting the inclination of the drum 2, and then control the mutual restriction relationship between the yield and quality of the ground sand. The discharge speed of the sand and the grinding medium 9 is controlled by controlling the inclination angle, so that the discharge speed of the sand and the grinding medium 9 from the discharge port 2-3 is consistent with the grinding quality, the sand and the grinding medium 9 fall into the discharge device 5 through the discharge port 2-3, the grinding medium separation screen 5-2 separates the sand and the grinding medium 9, the grinding medium 9 returns to the feeding port 2-1 through the grinding medium returning device 6 for recycling, and the sand enters the next process through the discharge hopper 5-3.

[0050] The sand grinder realizes the quality requirement of the roundness of the machine-made sand, and its significant technical feature is to break the traditional intermittent production in batches, realize the continuous production of the drum with high input and low output, and stir the central stirring shaft blade, which greatly improves the production efficiency and provides guarantee for the pipeline production of high-quality machine-made sand.

[0051] The continuous operation drum type and central stirring double-function sand grinder described in the embodiment is characterized in that the drum 2 is a cylindrical shape, the drum diameter and the drum length of the drum 2 are determined according to different rock types, centrifugal speed, yield and roundness, and the yield and the roundness of the machine-made sand are met.

[0052] The continuous operation drum type and central stirring double-function sand grinder described in the embodiment, wherein the drum driving device 3 drives the drum 2 in the middle of the drum 2 by using the gear 3-3 and the gear ring 3-4, four sets of supporting devices 10 are arranged on the left and right of the drum driving device 3, the supporting device 10 is composed of a supporting wheel 10-1 and a supporting base 10-2, the supporting wheel 10-1 is supported by the supporting base 10-2 and supported on the supporting ring 2-2 of the drum 2, the gear meshing gap is ensured to be not more than 0.4 mm, and the concentricity of the drum 2 is controlled to be ±0.15 mm. The sand grinder drum 2 is driven by the drum driving device 3, the variable speed motor 3-1 drives the driving gear 3-3 through the speed reducer 3-2, and the driving gear ring 3-4 rotates together with the sand grinder drum 2. The motor in the drum driving device 3 is a variable speed motor, which can adjust the speed.

[0053] The drum driving device 3 described in the embodiment is characterized in that the rotation speed of the drum 2 is adjustable, so as to adjust the balance relationship between the yield and the roundness, and adapt to different rock types, such as Figure 1As shown, the roller driving device 3 of the sanding machine roller 2 can adjust the rotation speed of the sanding machine roller to 10-60 r / min, and the roller inclination adjusting device 4 can adjust the inclination angle to 0°-8°. The sanding effect can be designed to match and adjust the reasonable barrel diameter and barrel length according to different types of rocks, so as to meet the output of 60 t / h of the sanding machine, and the angular and needle-shaped particles of the machine-made sand are ground and crushed, which can meet the requirements of the fluidity and strength of C50 and above concrete on the quality of machine-made sand.

[0054] The continuous operation roller type and center mixing dual-function sanding machine described in the embodiment is characterized in that the sanding machine roller 2 adjusts the inclination angle through the roller inclination adjusting device 4, and the sand moves downward in the process of the rotation of the roller 2 and the falling of the sand, so as to realize the continuous operation of the high-end entry and low-end exit of the sand. The sanding machine roller 2 has a high feeding end and a low discharging end, forming an inclination angle, and the inclination angle of the sanding machine roller 2 is adjusted by the roller inclination adjusting device 4. The bolts in the roller inclination adjusting device 4 are reverse-threaded bolts, and the double-nut back dead anti-loosening. The inclination angle can be adjusted within 0°-10° according to the actual situation. The sanding machine feeding port 2-1 is arranged at the center of the high-end end face plate of the sanding machine roller 2, and the discharging port 2-3 is arranged at the edge of the low-end end face plate of the sanding machine roller 2. The shape is fan-shaped, and it is a ring circumference grid type. Generally, the circumference is divided into 18 parts, and there are 9 discharging ports. The size of the discharging port is fan-shaped 400 mm long x 520 mm wide, and it has a discharging port baffle 2-4. The size of the discharging port 2-3 can be adjusted to control the discharging speed. Through continuous feeding and discharging, the sanding machine realizes assembly line operation and continuous production.

[0055] As shown in Figure 3 The roller 2 described in the embodiment is characterized in that the inner wall of the roller 2 is provided with a sand lifting plate 2-5, which is T-shaped, and the sand lifting working surface is 200x170x10mm, and the fixing surface is 200x200x10mm, which is arranged in a longitudinal continuous Chinese character shape, and the circumferential direction is divided into 15 parts, which is fixed on the barrel wall of the roller 2 by 4 bolts. The sand and grinding medium 9 in the roller 2 are lifted to a certain height and then fall, and through the impact and friction generated by repeated lifting and falling, the angularity of the machine-made sand can be eliminated, and the roundness standard requirement can be met.

[0056] As shown in Figure 4As shown in this embodiment, the continuous operation drum-type dual-function grinding mill with central stirring has a central stirring shaft 8-1 inside the grinding mill drum 2. The central stirring shaft 8-1 is supported at both ends by bearing seats 8-2 and consists of three sections of steel pipes with different diameters: the middle section is thicker, and the two end sections are thinner, connected by flanges. The central stirring shaft 8-1 has 21 sets of three-blade paddles 8-3, each set divided into 120° sections. The surface of the paddles 8-3 is coated with a strong and wear-resistant composite material to increase friction. The composite material consists of polyurethane or epoxy resin bonded with corundum. During stirring, the composite material on the paddles 8-3 rubs against the manufactured sand, polishing the edges and increasing grinding efficiency and shortening grinding time. Depending on the output and roundness, the angle of the paddles 8-3 can be adjusted using the paddle angle adjusting bolts 8-4, thus adjusting the speed at which the paddles 8-3 push the manufactured sand towards the feed end, increasing the friction time of the manufactured sand, and improving the grinding effect due to the tumbling friction of the paddles.

[0057] like Figure 4 As shown in the embodiment, the continuous operation drum-type and central stirring dual-function sander is characterized by the stirring shaft drive device 7 being driven at the high end, the variable speed motor 7-1 and the reducer 7-3 being connected by a transmission belt 7-2, the reducer 7-3 being directly connected to the central stirring shaft 8-1 through a coupling 7-4, the central stirring shaft 8-1 having an adjustable speed, the belt drive having an overload function, and the central stirring shaft 8-1 rotating in the opposite direction to the sander drum 2, causing the sand to move relative to each other inside the drum, increasing grinding efficiency and shortening grinding time.

[0058] The continuous operation drum-type and center-stirring dual-function sander described in this embodiment is characterized in that the feeding device consists of a feeding funnel 1-1 and a diversion pipe 1-2. The sand flows through the feeding funnel 1-1 and the diversion pipe 1-2. The diversion pipe 1-2 extends into the feeding port 2-1 on the drum 2, so that the sand enters the drum.

[0059] The continuous operation drum-type and center-stirring dual-function sander described in this embodiment is characterized by an environmentally friendly dust removal hood 5-1 at the discharge device 5, and a high-pressure dust exhaust port 5-4 above the dust removal hood 5-1, which can remove and collect the dust generated during the operation of the sander.

[0060] The continuous operation drum type and central stirring double function sand grinder described in the embodiment is characterized in that grinding media 9, ceramic grinding balls 9-1, are incorporated into the sand grinder drum 2, the volume of which is 30% of the machine-made sand, and the sand lifting plate 2-5 in the inner wall of the drum lifts the sand and grinding balls in the drum to an appropriate height of the sand grinder drum 2, and through mutual impact and grinding when freely falling, the machine-made sand edges and needle-shaped pieces can be eliminated. The ceramic grinding balls 9-1 are discharged from the discharge port 2-3 at the same time as the machine-made sand, and after passing through the discharge device 5, the ceramic grinding balls 9-1 are screened out by the grinding media separation screen 5-2, the grinding media separation screen 5-2 is a 30° inclined screen, the grinding balls are rolled to the grinding media return device 6 to continuously return to the feed hopper 1-1, the occupancy rate of the ceramic grinding balls 9-1 in the sand grinder drum 2 is maintained, the machine-made sand passes through the grinding media separation screen 5-2 and is transmitted into the next process by the discharge hopper 5-3, and continuous production is realized.

[0061] The continuous operation drum type and central stirring double function sand grinder described in the embodiment is characterized in that the drum two end steel support 11, the feed hopper support 11-2 in the drum two end steel support 11 is installed at the feed port 2-1 position of the sand grinder, the stirring shaft driving device 7 is placed on the drum two end steel support 11 close to the feed port 2-1 position, the central stirring shaft support 11-1 is placed on the drum two end steel support 11, and the dust cover support 11-3 is placed at the discharge port position of the drum two end steel support 11.

[0062] The sand grinder is placed on the sand grinder steel base 12, the sand grinder steel base 12 is installed on the foundation base 4-3 through the hinge support 4-1 and 4-2 height adjustment bolts, and the foundation base 4-3 is placed on the sand grinder foundation 13.

[0063] The sand grinder first solves the particle morphology of machine-made sand, and the circularity meets the standard requirements of machine-made sand, which is the first innovation in the sand and stone industry, and this scientific research achievement fills the international and domestic technical gap. It has the innovation of invention patent.

Claims

1. A continuous duty drum and center agitator dual function sand mill comprising a feed arrangement, a drum, a drum drive arrangement, grinding media, a sanding plate, a drum angle adjustment arrangement, a center agitator shaft, a paddle, an agitator shaft drive arrangement, a discharge arrangement, a grinding media separation screen, a grinding media return arrangement, characterized in that The feeding device feeds the sand and grinding medium into the drum, the inner wall of the drum is provided with sand lifting plates, a center stirring shaft with paddles is arranged in the center of the drum, the drum and the center stirring shaft are driven to rotate reversely by respective driving devices, the sand is pushed upward by the paddles in the process of falling downward, the inclination angle of the drum is adjusted by the inclination angle adjusting device, the speed of the sand and the grinding medium flowing out of the discharge port is coordinated with the sand grinding quality, the sand and the grinding medium are separated by the grinding medium separation screen at the discharge port, the grinding medium returns to the feeding port for recycling, and the significant technical feature is that the traditional batch production is broken, the continuous production of the drum is realized, the center stirring shaft is stirred by the paddles, and the production efficiency is greatly improved.

2. The continuous operation double function sand mill of barrel type and center stirring according to claim 1, characterized in that The drum is cylindrical, the drum diameter and the drum length are determined according to different rock types, centrifugal speed, output and circularity, and the drum satisfies the output and circularity requirements of the sand grinder.

3. The continuous duty drum and center mix dual function sander as set forth in claim 1, wherein The drum driving device is driven by a gear and a gear ring in the middle of the drum, a plurality of supporting drag wheels are arranged on the left and right of the driving device to ensure the gear meshing gap and control the concentricity of the drum.

4. The continuous duty drum and center agitator dual function sander of claim 3 wherein The drum rotating speed is adjustable to adjust the balance relationship between the output and the circularity and adapt to different rock types.

5. The continuous duty drum and center agitator dual function sander of claim 1 wherein The sanding machine roller passes through The drum inclination angle adjusting device The inclination angle is adjusted, the sand moves downward in the process of the roller rotation and sand falling, the continuous operation of sand high-end entry and low-end exit is realized, and the constraint relationship between sand production and sand grinding quality is balanced.

6. The continuous duty drum and center agitator dual function sander of claim 2 wherein The sand lifting plates are arranged in a triangular shape, the sand and the grinding medium in the drum are lifted to a certain height and then fall, the impact and friction generated by repeated lifting and falling can eliminate the corners of the machine-made sand and realize the circularity standard requirement, so that the fluidity and strength of the concrete are ensured.

7. The continuous duty drum and center mix dual function sander of claim 1 wherein, The drum of the sand grinder is provided with a center stirring shaft, the two ends of the center stirring shaft are supported by bearings, the center stirring shaft is composed of three steel pipes with different pipe diameters, a plurality of paddles are arranged on the center stirring shaft, the surface of the paddles is coated with a mixed material composed of a glue solution with strong adhesion and wear resistance and high-strength small particle bodies, the mixed material is formed by polyurethane or epoxy resin bonded with diamond sand, so as to polish the corners of the machine-made sand through the friction between the mixed material and the machine-made sand during stirring, improve the grinding efficiency and shorten the grinding time, the angle of the paddle can be adjusted according to the output and the circularity requirement of the machine-made sand, so as to adjust the speed of the paddle pushing the machine-made sand to the feeding end, increase the friction time of the machine-made sand, and improve the sand grinding effect through the rolling friction of the paddle.

8. The continuous duty drum and center mix dual function sander as set forth in claim 1, wherein said drum is mounted on said frame by means of a plurality of bearings. The stirring shaft driving device is driven at the high end of the sand grinder, the motor and the speed reducer are connected by a belt, the speed reducer is directly connected with the center stirring shaft, the rotating speed of the center stirring shaft is adjustable through the frequency conversion motor and the speed reducer, the belt transmission has an overload function, the center stirring shaft rotates in the opposite direction of the drum of the sand grinder, so that the sand moves relatively in the drum, the sand is polished, the needle-like shape is eliminated, the sand grinding effect is improved, and the grinding time is shortened.

9. The continuous duty drum and center mix dual function sander of claim 1 wherein The feed inlet is arranged on the sanding machine roller The high end face plate The discharge outlet is arranged on the periphery of the low end face plate of the sanding machine roller, is uniformly distributed, and is provided with a discharge speed adjusting plate. An environmental protection dust removal cover is arranged at the discharge device.

10. The continuous duty drum and center agitator dual function sander of claim 1 wherein The grinding medium is mixed into the drum of the sand grinder, the grinding medium is screened out by the grinding medium separation screen at the discharge port, continuously returns to the feeding hopper, keeps the proportion of the grinding medium in the drum of the sand grinder unchanged, the sand passes through the grinding medium separation screen and enters the next process, and continuous production is realized.

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