Building gravel grinding device and method

Abstract

The invention relates to the related technical field of grinding machinery, discloses a building gravel grinding device and method, and aims to solve the problem of low construction efficiency caused by dispersed grinding and screening procedures. A grinding roller for grinding and crushing gravel is arranged on the inner side of a filter cartridge, and after the gravel is fed into the filter cartridge, the gravel can be screened firstly, and the construction efficiency is improved; and then along with rotation of the filter drum, the screened sand and stones are conveyed to the position between the grinding rollers to be ground and crushed, the ground and crushed sand and stones are subjected to secondary screening, and the unqualified sand and stones are conveyed back to the grinding rollers again to be ground for multiple times. And finally, the effects of screening in real time after the sand and stones are ground and feeding back the sand and stones with unqualified volumes for secondary grinding are achieved.

Description

Technical Field

[0001] The present invention relates to the technical field related to grinding machinery, and in particular to a device and method for grinding building sand and stone. Background Art

[0002] In construction projects, sand and gravel are indispensable basic raw materials. Their quality and processing technology are directly related to the stability and overall quality of the project. Before use, sand and gravel must go through a fine grinding and screening process to ensure that their particle size, shape and cleanliness meet specific usage standards. However, there are some links in the current actual processing process that need to be optimized.

[0003] Specifically, although grinding and screening are two key steps in sand and gravel processing, in most processing sites, these two processes are often carried out separately. This separation not only increases the number of processing steps and prolongs the overall processing time, but also significantly affects the construction progress and increases the time cost of the project. What is more cumbersome is that after the initial screening, the large volume of sand and gravel that fails to meet the particle size requirements needs to be transported back to the processing area for secondary grinding or crushing. This process is not only inefficient, but also increases transportation and labor costs, and also brings considerable challenges to rapid transportation and collection. Summary of the invention

[0004] The present invention proposes a construction sand and gravel grinding device and method, which has the advantages of real-time screening of sand and gravel after grinding and returning sand and gravel with unqualified volume for secondary grinding, so as to solve the problem of low construction efficiency caused by the dispersion of grinding and screening processes proposed in the above background technology.

[0005] To achieve the above-mentioned purpose, the present invention adopts the following technical scheme: a construction sand and stone grinding device, comprising: a grinding box, the front and rear ends of which are respectively fastened and connected with a rear cover plate and a front cover plate; a support ring frame, fastened to the end of the rear cover plate, and a filter cartridge is movably installed on the outer side of the support ring frame, and filter holes are opened on the outer side of the filter cartridge; a pair of externally meshed driving gears and driven gears are movably installed on the surface of the support ring frame, and a grinding roller located in the middle of the inner side of the filter cartridge is coaxially fixed on the output ends of the driving gear and the driven gear; a motor reducer group, fixed to the end of the rear cover plate, controlled by a controller fixed to the side of the grinding box, and the output shaft of the motor reducer group is coaxially arranged with the driving gear; annular inner teeth, arranged on the inner side of the filter cartridge; an intermediate gear, movably installed on the support ring frame, respectively meshing with the annular inner teeth and the outer teeth of the driven gear; a feed pipe, fixed on the support ring frame.

[0006] Furthermore, a crushing tooth head is arranged on the outer side of the grinding roller.

[0007] Further, the bottom of the feed pipe is located below the grinding roller.

[0008] Furthermore, a discharge ring frame is movably installed at the end of the support ring frame, and the discharge ring frame moves synchronously with the filter cartridge. A discharge port is opened on the surface of the discharge ring frame, and a support slide is fixedly installed on the surface of the discharge ring frame. The bottom of the support slide is slidably connected to the inner side of the filter cartridge.

[0009] Furthermore, a detection slider is movably installed on the surface of the supporting slide, an adjusting push rod is fixedly connected to the end of the detection slider, and a stop hole cooperating with the adjusting push rod is opened on the inner side of the end of the filter cartridge.

[0010] Furthermore, an adjustment frame is movably installed at the end of the detection slider, an adjustment spring is fixedly connected between the inner side of the adjustment frame and the end of the detection slider, a clearing needle roller is movably installed on the adjustment frame, and a clearing needle corresponding to the filter hole on the filter cartridge is arranged on the outer side of the clearing needle roller; an anti-detachment ejector rod is fixedly connected to the end of the detection slider, and a guide ring frame for limiting the anti-detachment ejector rod is fixedly connected to the side of the front cover plate.

[0011] Furthermore, the guide ring frame is composed of two concentric circular rings, a disengagement slide is fixedly connected to the outer circular ring, and a retention groove is provided on the inner circular ring of the guide ring frame.

[0012] Furthermore, a transfer groove connected to the end of the stop hole is provided on the inner side of the end of the filter cartridge.

[0013] Furthermore, the cross-section of the detection slider is in the shape of a right triangle.

[0014] A method for grinding building sand and stone comprises the following steps: S1. The sand and gravel to be ground are transported to the inside of the filter cartridge through the feed pipe.

[0015] S2. Start the motor reducer group to drive the grinding roller and filter cartridge to rotate synchronously.

[0016] S3. During the rotation of the filter cartridge, the filter holes on it are used to perform preliminary filtration on the input sand and gravel. The sand and gravel particles that meet the requirements will be discharged through the filter holes opened on the outside of the filter cartridge, completing the preliminary screening process.

[0017] S4. The sand and gravel particles remaining in the filter cartridge are sent between the grinding rollers. Under the action of extrusion and friction, the sand and gravel particles will be ground and broken into smaller particle sizes.

[0018] S5. Screening the ground and crushed sand and stone particles again.

[0019] The present invention has the following beneficial effects: The present invention provides a construction sand and stone grinding device and method. The core component of the device is two grinding rollers cleverly arranged inside a filter cartridge, and the grinding rollers are responsible for fine grinding and crushing of the sand and stone.

[0020] When the sand and gravel to be processed are sent into the filter cartridge, they will first undergo a preliminary screening process. This step is achieved through the screen set inside the filter cartridge, which can quickly remove those sand and gravel particles that have met the required volume, thereby avoiding unnecessary grinding and saving energy and time.

[0021] Then, as the filter drum rotates slowly and steadily, the sand and gravel that have been preliminarily screened and still need further processing will be transported to the grinding rollers. Here, the grinding rollers use their powerful crushing capacity to finely grind and crush the sand and gravel until it reaches the required particle size.

[0022] After grinding and crushing, the sand and gravel will go through a more refined secondary screening process. This step can ensure that all sand and gravel particles meet strict quality standards. Any sand and gravel that does not meet the quality standards will be automatically detected and transported back to the grinding roller for multiple grinding until it fully meets the requirements.

[0023] Through this innovative grinding device and method, we not only achieve real-time screening of sand and gravel after grinding, but also automatically send unqualified sand and gravel back to the grinding area for secondary processing, thus ensuring the quality and consistency of the final product. This device and method not only greatly improves the efficiency and accuracy of sand and gravel processing, but also significantly reduces energy consumption and labor costs, making a positive contribution to the sustainable development of the construction industry. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The accompanying drawings, which constitute a part of the specification, illustrate embodiments of the present disclosure and, together with the description, serve to explain the principles of the present disclosure.

[0025] The present invention may be more clearly understood from the following detailed description with reference to the accompanying drawings, in which: Figure 1 It is a schematic diagram of the overall front external three-dimensional structure of the present invention; Figure 2 It is a schematic diagram of the external three-dimensional structure of the overall back side of the present invention; Figure 3 It is a schematic diagram of the overall internal three-dimensional structure of the present invention; Figure 4 It is a schematic diagram of the transmission structure between the gears and their installation positions in the present invention; Figure 5 It is a schematic diagram of the installation position of the filter cartridge and its internal three-dimensional structure in the present invention; Figure 6 It is a schematic diagram of the internal planar cross-sectional structure of the grinding box; Figure 7 It is a schematic diagram of the position structure between the unloading ring frame and the front cover plate in the present invention; Figure 8This is a schematic diagram of the three-dimensional structure of the guide ring frame; Fig. 9 It is a schematic diagram of the three-dimensional structure of the filter cartridge in the present invention.

[0026] In the figure: 1. grinding box; 2. rear cover; 3. front cover; 4. controller; 5. motor reducer group; 6. feed pipe; 7. filter cartridge; 701. annular inner teeth; 702. anti-rotation hole; 703. transfer trough; 8. support ring frame; 9. discharge ring frame; 10. discharge port; 11. driving gear; 12. driven gear; 13. intermediate gear; 14. grinding roller; 15. support slide; 16. detection slide; 160. anti-slip push rod; 17. adjustment push rod; 18. adjustment frame; 180. adjustment spring; 19. clearing needle roller; 20. guide ring frame; 200. disengagement slide; 201. stay channel. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0028] For example, see Figure 1 and Figure 2 It can be seen that the grinding box 1 is supported by the legs at the bottom so that it can be stably placed in the desired position. The front and rear ends of the grinding box 1 are respectively connected by bolts with a rear cover plate 2 and a front cover plate 3. Figure 3 and Figure 4 It can be seen that the end of the rear cover plate 2 has a support ring frame 8 fastened to the inside of the grinding box 1 by means of screws. The support ring frame 8 can provide a stable support for the filter cartridge 7. Specifically, the filter cartridge 7 is movably arranged on the outside of the support ring frame 8 to ensure that the filter cartridge 7 can only rotate on the outside of the support ring frame 8. Figure 3-Figure 5 It can be seen that a pair of externally meshed driving gears 11 and driven gears 12 are movably mounted on the surface of the support ring frame 8, and a grinding roller 14 located in the middle of the inner side of the filter cartridge 7 is coaxially fixedly mounted on the output ends of the driving gear 11 and the driven gear 12. A crushing tooth head is generally provided on the outer side of the grinding roller 14. When the two grinding rollers 14 move synchronously, the sand and gravel input between the two can be ground and crushed, which is also an important means for grinding and crushing sand and gravel in the first embodiment.

[0029] Regarding the driving force source of the grinding roller 14, Figure 3 and Figure 4It can be seen that the end of the rear cover plate 2 is fastened with a motor reducer group 5 by bolts, and the output shaft of the motor reducer group 5 is coaxially arranged with the driving gear 11. The motor reducer group 5 is controlled by the controller 4 fixed on the side of the grinding box 1. When the controller 4 controls the motor reducer group 5 to start, the rotation of the motor reducer group 5 can realize the synchronous rotation of the driving gear 11 and the driven gear 12. Figure 4 It can be known that an annular inner tooth 701 is provided on the inner side of the filter cartridge 7, and power is transmitted between the annular inner tooth 701 and the driven gear 12 by means of an intermediate gear 13 movably mounted on the support ring frame 8. When the motor reducer group 5 drives the driving gear 11 to rotate, the driving gear 11 drives the driven gear 12 to rotate. At the same time, the driven gear 12 drives the annular inner tooth 701 to drive the filter cartridge 7 to rotate synchronously by means of the intermediate gear 13, thereby ensuring that the filter cartridge 7 can rotate synchronously when the motor reducer group 5 is started.

[0030] A feed pipe 6 is fixedly installed at the bottom of the support ring frame 8. Figure 3 It can be seen that the bottom of the feed pipe 6 is located below the grinding roller 14. When the sand and gravel are transported from the feed pipe 6 to the filter cartridge 7, the motor reducer group 5 drives the grinding roller 14 and the filter cartridge 7 to rotate synchronously. Therefore, the rotating filter cartridge 7 can first filter the input sand and gravel, so that the sand and gravel particles that meet the conditions are discharged from the filter holes opened on the outside of the filter cartridge 7. Finally, the filtered sand and gravel particles are discharged from the bottom of the grinding box 1. In this way, the preliminary screening of the sand and gravel particles is completed, thereby avoiding unnecessary grinding and crushing.

[0031] In the first embodiment, when there are too many sand and gravel particles remaining in the filter cartridge 7, the controller 4 can be used to control the motor reducer group 5 to rotate rapidly instantaneously, so that the sand and gravel particles in the filter cartridge 7 move upward along with the filter cartridge 7 under the centrifugal force, and after the speed is reduced, the sand and gravel particles fall between the grinding rollers 14, thereby completing the crushing of the sand and gravel particles.

[0032] The second embodiment is a further improvement on the basis of the first embodiment. In order to ensure that the sand and gravel screened in the filter cartridge 7 can be stably transported to the grinding roller 14, thereby achieving the grinding and crushing of the sand and gravel, the second embodiment is combined with the first embodiment. Figure 5-Figure 7It can be seen that the end of the support ring frame 8 is movably mounted with a discharge ring frame 9 located inside the filter cartridge 7. The discharge ring frame 9 can rotate around the central axis of the support ring frame 8. The discharge port 10 is opened on the surface of the discharge ring frame 9. When the discharge port 10 and the feed pipe 6 are aligned, the sand and gravel in the feed pipe 6 can enter the filter cartridge 7. Similarly, when the discharge port 10 is away from the feed pipe 6, the end of the feed pipe 6 is blocked by the side of the discharge port 10, thereby preventing the sand and gravel from being fed into the filter cartridge 7. It should be noted that, since the discharge port 10 forms a relative shear with the feed pipe 6 when rotating, even if the sand and gravel are stuck between the two, the sand and gravel particles can be crushed due to the shear force. The end of the support slide 15 is fastened to the surface of the discharge ring frame 9 by bolts, and the bottom of the support slide 15 is slidably connected to the inner side of the filter cartridge 7. When the support slide 15 slides along the inner side of the filter cartridge 7, the support slide 15 can transport all the screened sand and gravel to between the grinding rollers 14 to achieve the grinding and crushing of the sand and gravel. It should be noted that if the sand and gravel are only pushed by the support slide 15, it is necessary to ensure that the discharge ring frame 9 can move synchronously with the filter cartridge 7. In this way, when the filter cartridge 7 rotates, it will drive the support slide 15 to rotate synchronously, so that the sand and gravel inside the filter cartridge 7 are all transported to between the grinding rollers 14 for grinding and crushing under the obstruction of the support slide 15.

[0033] Specific, combined Figure 7 It can be seen that the surface of the support slide 15 has a detection slide 16 movably installed through a dovetail groove, and the detection slide 16 can reciprocate along the radial direction of the unloading ring frame 9 through the guidance of the dovetail groove, and Figure 5 It can be seen that the end of the detection slider 16 is fixedly connected to the adjustment push rod 17, corresponding to which, the reference Fig. 9 As shown, a stop hole 702 cooperating with the adjusting top rod 17 is opened on the inner side of the end of the filter cartridge 7. When the adjusting top rod 17 is inserted into the stop hole 702, the movement of the adjusting top rod 17 can be limited, thereby ensuring that during the movement of the filter cartridge 7, the detection slider 16 and the supporting slide 15 can be driven to move synchronously, and the supporting slide 15 can be used to push the screened sand and gravel between the grinding rollers 14.

[0034] If too much sand and stone material is fed into the feed pipe 6, the filtration burden in the filter cartridge 7 will increase; moreover, when the filter cartridge 7 continuously screens the sand and stone, the filter holes used for screening will be clogged, thereby affecting the screening efficiency. In order to prevent such problems from occurring, the filter cartridge 7 is combined with the filter cartridge 7 to filter the sand and stone. Figure 3 , Figure 5 and Figure 7It can be seen that an adjustment frame 18 is movably mounted on the end of the detection slider 16, and the adjustment frame 18 and the detection slider 16 are limited by the cylindrical guide rod, forcing the adjustment frame 18 to only reciprocate along the radial direction of the filter cartridge 7. In addition, an adjustment spring 180 is fixedly connected between the inner side of the adjustment frame 18 and the end of the detection slider 16. Under the push of the elastic force of the adjustment spring 180, the clearing needle roller 19 movably mounted on the adjustment frame 18 is forced to always have a tendency to be closely attached to the outer side of the filter cartridge 7. A clearing needle corresponding to the filter hole on the filter cartridge 7 is arranged on the outer side of the clearing needle roller 19. When the clearing needle on the outer side of the clearing needle roller 19 penetrates the filter hole, the sand and stones blocked in the filter hole can be pushed into the filter cartridge 7.

[0035] Moreover, according to Figure 5 , Figure 7-Figure 9 As shown, the end of the detection slider 16 is fixedly connected to an outwardly protruding anti-dropping rod 160, and correspondingly, the side of the front cover plate 3 is fixedly connected to a guide ring frame 20 for limiting the anti-dropping rod 160. Figure 8 It can be seen that the guide ring frame 20 is composed of two concentric rings, and the outer ring is fixedly connected to the disengagement slide 200, and the surface shape of the disengagement slide 200 is approximately a right-angled trapezoid. The inner ring of the guide ring frame 20 is provided with a retention groove 201 at a corresponding position, and the retention groove 201 is approximately a rectangular groove. Fig. 9 As shown, a transfer groove 703 connected to the end of the stop hole 702 is provided on the inner side of the end of the filter cartridge 7, and the transfer groove 703 is an arc-shaped groove. The specific working contents are as follows: Under normal circumstances, under the push of the elastic force of the adjustment spring 180, the detection slider 16 is pressed against the inner side of the filter cartridge 7 according to the guidance of the support slide 15. At this time, the adjustment push rod 17 is inserted into the stop hole 702, and the adjustment frame 18 is pushed by the elastic force of the adjustment spring 180 so that the clearing needle on the clearing needle roller 19 is inserted into the filter hole on the outside of the filter cartridge 7.

[0036] As the controller 4 controls the motor reducer group 5 to work, the motor reducer group 5 will cause the grinding roller 14 and the filter cartridge 7 to rotate synchronously. Moreover, during the rotation of the filter cartridge 7, since the adjusting push rod 17 is inserted into the stop hole 702, it will drive the supporting slide 15 and the clearing needle roller 19 to rotate synchronously. The movement of the supporting slide 15 will drive the unloading ring frame 9 to rotate synchronously. At this time, the anti-detachment push rod 160 moves along the annular groove between the guide ring frames 20.

[0037] When the discharge port 10 passes through the feed pipe 6, Figure 3 It can be seen that, since the feed pipe 6 is arranged relatively tilted, the sand and gravel will slide into the inner cavity of the filter cartridge 7. As the filter cartridge 7 rotates continuously, the discharge ring frame 9 will eventually drive the discharge port 10 away from the feed pipe 6, thereby realizing the intermittent supply of sand and gravel in the feed pipe 6 into the filter cartridge 7. Figure 6As shown, as the filter cartridge 7 drives the detection slider 16 to rotate counterclockwise, if too much sand and gravel are screened at the bottom of the filter cartridge 7, the amount of sand and gravel fed in needs to be reduced. At this time, combined with the cross-sectional shape of the detection slider 16 which is approximately a right triangle, when the detection slider 16 rotates counterclockwise with the filter cartridge 7, the inclined surface of the detection slider 16 is blocked by the sand and gravel, and there is a tendency for the detection slider 16 to move radially and toward the middle of the filter cartridge 7. At this time, the detection slider 16 will further compress the adjustment spring 180 upward, and drive the adjustment push rod 17 and the anti-detachment push rod 160 to move synchronously upward. At this time, since the anti-detachment push rod 160 is relatively located between the annular grooves of the guide ring frame 20, the upward anti-detachment push rod 160 will eventually reach Figure 8 The bottom of the inner ring in the middle limits the detection slider 16 to continue to move, preventing the adjusting push rod 17 from escaping from the anti-rotation hole 702. During the upward movement of the detection slider 16, the detection slider 16 will block the discharge port 10 to ensure that when there is too much sand and gravel in the filter cartridge 7, the injection of sand and gravel is reduced through the blocking of the discharge port 10, thereby avoiding the problem that the filter cartridge 7 cannot achieve complete screening due to excessive injection of sand and gravel.

[0038] Afterwards, as the support slide 15 and the detection slide 16 push the sand and gravel at the bottom of the inner side of the filter cartridge 7 to rotate 180°, the sand and gravel will fall between the grinding rollers 14. The grinding rollers 14 can be used to grind and crush the sieved sand and gravel to achieve the required particle size. At the same time, the anti-detachment push rod 160 that rotates to the top will first move along the inclined surface of the detachment slide 200, so that the anti-detachment push rod 160 further approaches the guide ring frame 20 of the inner ring until the adjustment push rod 17 is detached from the anti-rotation hole 702. However, at this time, the anti-detachment push rod 160 has not yet crossed the inclined surface of the detachment slide 200. Afterwards, as the filter cartridge 7 continues to rotate counterclockwise, Fig. 9As shown, the adjusting top rod 17 will cause the movement of the adjusting top rod 17 along the transfer groove 703, and when the adjusting top rod 17 moves along the transition slope between the transfer groove 703 and the inner side of the filter cartridge 7, the adjusting top rod 17 will be further pushed toward the center of the filter cartridge 7 until it passes over the detachment slide 200. After that, since the adjusting top rod 17 abuts against the inner side of the end of the filter cartridge 7, this will cause the anti-detachment top rod 160 to enter the retention groove 201, and the anti-detachment top rod 160 is blocked by the inner side of the retention groove 201, thereby limiting the detection slider 16 and the support slide 15 from rotating synchronously with the filter cartridge 7. On the one hand, when the support carriage 15 no longer rotates synchronously with the filter cartridge 7, the filter cartridge 7 has enough time to screen the sand and gravel inside it, ensuring the efficiency of sand and gravel screening; on the other hand, the clearing needle roller 19 also cannot move synchronously with the filter cartridge 7. When the filter cartridge 7 rotates, the clearing needle on the outside of the clearing needle roller 19 and the filter hole on the outside of the filter cartridge 7 are inserted into the filter hole to clear out the sand and gravel blocked in the filter hole. Since the clearing needle roller 19 is located above the grinding rollers 14 at this time, when the sand and gravel in the filter hole on the filter cartridge 7 are cleared out, they will directly fall between the grinding rollers 14 for grinding and crushing, so that the sand and gravel that can be blocked in the filter hole can be ground and crushed again, avoiding the sand and gravel cleared from the filter hole from being blocked in other filter holes again after falling.

[0039] After that, when the clearing needle roller 19 completely clears the filter holes on the outside of the filter cartridge 7, the stop hole 702 rotates to the adjusting top rod 17 again, and the adjusting top rod 17 is forced to reach the stop hole 702 under the elastic force of the adjustment spring 180, and the support slide 15 and the detection slide 16 are driven to rotate again through the stop hole 702. After that, the above-mentioned contents are circulated again, so that the detection slide 16 is used again to detect whether the amount of sand and gravel at the bottom of the inner side of the filter cartridge 7 needs to be replenished, and the sand and gravel screened by the filter cartridge 7 is transported to the grinding rollers 14 again through the support slide 15 and the detection slide 16. Finally, the filter cartridge 7 and the detection slide 16 and the clearing needle roller 19 are separated again, and the clearing needle roller 19 clears the filter holes on the outside of the filter cartridge 7. Such a cycle ensures that sand and gravel can be input as needed, and the screening efficiency of sand and gravel is enhanced by clearing the filter holes.

Claims

1. A construction sand and stone grinding device, characterized in that: include: A grinding box (1) having a rear cover plate (2) and a front cover plate (3) respectively fastened to the front and rear ends; A support ring frame (8) is fastened to the end of the rear cover plate (2), and a filter cartridge (7) is movably mounted on the outer side of the support ring frame (8), wherein filter holes are formed on the outer side of the filter cartridge (7); A pair of externally meshed driving gears (11) and driven gears (12) are movably mounted on the surface of the support ring frame (8); a grinding roller (14) located in the middle of the inner side of the filter cartridge (7) is coaxially fixedly mounted on the output ends of the driving gear (11) and the driven gear (12); The motor reducer group (5) is fixed to the end of the rear cover plate (2) and is regulated by a controller (4) fixed to the side of the grinding box (1), and the output shaft of the motor reducer group (5) is coaxially arranged with the driving gear (11); An annular inner tooth (701) is arranged on the inner side of the filter cartridge (7); The intermediate gear (13) is movably mounted on the supporting ring frame (8) and is respectively meshed with the annular inner teeth (701) and the outer teeth of the driven gear (12); The feed pipe (6) is fixed on the support ring frame (8).

2. The construction sand and stone grinding device according to claim 1, characterized in that: A crushing tooth head is arranged on the outer side of the grinding roller (14).

3. The construction sand and stone grinding device according to claim 1, characterized in that: The bottom of the feed pipe (6) is located below the grinding roller (14).

4. The construction sand and stone grinding device according to claim 1, characterized in that: A discharge ring frame (9) is movably mounted on the end of the support ring frame (8), and the discharge ring frame (9) moves synchronously with the filter cartridge (7). A discharge port (10) is provided on the surface of the discharge ring frame (9), and a support slide frame (15) is fixedly mounted on the surface of the discharge ring frame (9), and the bottom of the support slide frame (15) is slidably connected to the inner side of the filter cartridge (7).

5. The construction sand and stone grinding device according to claim 4, characterized in that: A detection slide block (16) is movably mounted on the surface of the support slide (15); an adjustment push rod (17) is fixedly connected to the end of the detection slide block (16); and a rotation-stopping hole (702) cooperating with the adjustment push rod (17) is provided on the inner side of the end of the filter cartridge (7).

6. The construction sand and stone grinding device according to claim 5, characterized in that: An adjustment frame (18) is movably mounted on the end of the detection slide block (16); an adjustment spring (180) is fixedly connected between the inner side of the adjustment frame (18) and the end of the detection slide block (16); a clearing needle roller (19) is movably mounted on the adjustment frame (18); and clearing needles corresponding to filter holes on the filter cartridge (7) are arranged on the outer side of the clearing needle roller (19); An anti-dropout ejector rod (160) is fixedly connected to the end of the detection slide block (16), and a guide ring frame (20) for limiting the anti-dropout ejector rod (160) is fixedly connected to the side of the front cover plate (3).

7. The construction sand and stone grinding device according to claim 6, characterized in that: The guide ring frame (20) is composed of two concentric circular rings, the circular ring located on the outer side is fixedly connected to a disengagement slide seat (200), and the circular ring located on the inner side of the guide ring frame (20) is provided with a retention groove (201).

8. The construction sand and stone grinding device according to claim 7, characterized in that: A transfer groove (703) connected to the end of the stop hole (702) is provided on the inner side of the end of the filter cartridge (7).

9. The construction sand and stone grinding device according to claim 5, characterized in that: The cross-sectional shape of the detection slider (16) is a right triangle.

10. A method for grinding building sand and stone, using the building sand and stone grinding device as claimed in claim 1, characterized in that: The following steps are involved: S1, the sand and gravel to be ground are transported to the interior of the filter cartridge (7) through the feed pipe (6); S2, starting the motor reducer assembly (5) to drive the grinding roller (14) and the filter cartridge (7) to rotate synchronously; S3, during the rotation of the filter cartridge (7), the filter holes thereon are used to perform preliminary filtration on the input sand and gravel, and sand and gravel particles meeting the conditions are discharged through the filter holes provided on the outside of the filter cartridge (7), thus completing the preliminary screening process; S4, the sand and stone particles remaining in the filter cartridge (7) are sent between the grinding rollers (14), where they are ground and crushed into smaller particle sizes under the action of extrusion and friction; S5. Screening the ground and crushed sand and stone particles again.

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