Gravel crushing and screening device

Abstract

A gravel crushing and screening device relates to the field of gravel crushing and screening equipment and comprises a box body, a feeding port is formed in the top end of the box body, a discharging port is formed in the bottom of the box body, a main frame is transversely arranged in the box body, a crushing assembly and a screening assembly are arranged on the main frame in an up-down mode, and the screening assembly comprises a screening plate and a driving machine which is in transmission connection with the screening plate and can drive the screening plate to shake. A sieve plate replacing opening is formed in the position, corresponding to the main frame, of one side of the box body, the main frame comprises two sliding seats which are oppositely arranged, and the sieve plate penetrates through the sieve plate replacing opening to be inserted between the two sliding seats. The sieve plate is driven by the driving machine to shake, aggregate with a plurality of particle sizes can be obtained on the premise that the strength of the sieve plate can be guaranteed through the design of the replaceable sieve plate, the aggregate with each particle size can be sieved by the sieve plate with the sieve holes with the corresponding size, and material distribution is accurate.

Description

Technical Field

[0001] The utility model relates to the field of sand and gravel crushing and screening equipment, in particular to a sand and gravel crushing and screening device. Background Art

[0002] Sand and gravel aggregates are granular loose materials that act as a skeleton or filler in concrete and are widely used in various infrastructure construction projects. However, the amount of coarse and fine aggregates used on site is huge. The use of sand and gravel crushing and screening equipment can help to efficiently process sand and gravel resources, support the production of recycled aggregates, and reduce the mining of natural sand and gravel. It is of great significance to environmental protection and sustainable utilization of resources.

[0003] However, there are still some problems with the existing sand and gravel crushing and screening devices. For example, a recycled concrete processing device with application number CN219252705U includes a processing device, a crushing device is connected to the inside of the processing device, and a screening device is connected to the bottom of the processing device, wherein the screening device includes a leakage plate slidingly arranged in a screening box, and the screening box is divided into a fine material area, a medium material area and a coarse material area by a partition below the leakage plate. The leakage plate is arranged from left to right, corresponding to the fine material area, the medium material area and the coarse material area, and is provided with small leakage holes, medium leakage holes and large leakage holes. The leakage holes are used to obtain three kinds of aggregates with different particle sizes. However, it was found during use that the device could not obtain aggregates with more particle sizes, because this structure can only obtain aggregates with more particle sizes by extending the leakage plate and opening more leakage holes of various specifications on the leakage plate, which will lead to reduced strength of the leakage plate, easy damage, and inability to work normally; at the same time, the small-size aggregate on the leakage plate of the device will also roll down to the medium-size material area with the large-size aggregate, and the medium-size aggregate will also roll down to the coarse-size material area with the large-size aggregate, so the material separation is not accurate. Utility Model Content

[0004] In order to solve the technical problems in the above-mentioned background technology that the existing sand and gravel crushing and screening devices cannot obtain aggregates of various particle sizes and the material separation is inaccurate, the utility model provides a sand and gravel crushing and screening device.

[0005] The technical solution of this utility model is as follows:

[0006] A sand and gravel crushing and screening device includes a box body, a material inlet is provided at the top, a material outlet is provided at the bottom, a main frame is provided laterally inside, and a crushing component and a screening component are arranged up and down on the main frame. Through the above structural design, when sand and gravel are processed, the sand and gravel can enter the box body from the top of the box body, and be discharged from the bottom of the box body after being crushed and screened. The device has a compact structure and occupies little space.

[0007] As the core technical concept of the present invention, the screening assembly includes a sieve plate and a driving machine that is transmission-connected to the sieve plate and can drive the sieve plate to shake. A number of sieve holes are provided on the sieve plate. A sieve plate replacement port is opened on one side of the box body corresponding to the position of the main frame. The main frame includes two slides arranged opposite to each other. The sieve plate passes through the sieve plate replacement port and is inserted between the two slides. Through the above structural design, the operator can design a sieve plate with a corresponding sieve hole size according to the size of the particle size aggregate to be obtained, and replace the corresponding sieve plate during processing to obtain particle size aggregate of the corresponding size, thereby obtaining several kinds of aggregate particle sizes while ensuring the strength of the sieve plate, and accurately dividing the materials.

[0008] Furthermore, the slide seat includes a slide frame and a slide rail slidingly arranged on one side thereof. The driving motor is connected to the slide rail and is configured to drive the slide rail to slide along the slide frame. The screen plate is plug-connected to the slide rail. During operation, the screen plate can move back and forth along the slide frame with the slide rail, thereby meeting the strength of the screen plate and being able to obtain aggregates of various particle sizes while meeting the screening function of the screen plate and improving the working efficiency of aggregate screening.

[0009] As an implementation method, a side plate is provided on one side of the slide, and the driving machine includes a push rod and a driving assembly provided on the side plate. Avoidance grooves are opened on the side plate and the slide along the sliding direction of the slide rail. The head end of the push rod is transmission-connected to the driving assembly, and the tail end passes through the avoidance groove and is connected to the slide rail. The push rod is driven by the driving assembly to slide along the avoidance groove, so that the screen plate can slide along the avoidance groove with the push rod, thereby making the shaking movement of the screen plate more stable.

[0010] In order to improve the working stability of the screen plate, a stop hole is provided on the screen plate, and a plug rod which can be plugged into the stop hole is spirally provided on the slide rail. The screen plate can be disassembled and assembled by inserting and withdrawing the plug rod, which is easy to use.

[0011] Furthermore, the driving assembly includes a runner and a connecting rod as well as a power source for driving the runner to rotate. The tail end of the connecting rod is hinged to the push rod, and the head end is hinged to the runner through a hinge shaft, and the hinge shaft is not coaxial with the runner. Its structural design can not only meet the strength of the screen plate, obtain aggregates of various particle sizes and meet the screening function of the screen plate, but also has a compact structure and occupies little space.

[0012] In order to improve the accuracy of material separation, multiple crushing and screening groups are arranged at intervals above and below the main frame. The crushing and screening groups include crushing components and screening components, and the apertures of the multiple screen plates in the multiple crushing and screening groups decrease from top to bottom. Through the above design, the crushing and screening of this device is multi-stage crushing and screening.

[0013] Through step-by-step crushing and screening, sand and gravel are processed to different degrees in each level of crushing and screening group. The higher the degree of crushing, the coarser sand and gravel are screened out in the upper layer, while the finer sand and gravel continue to flow downward into the next level for further screening. This step-by-step screening method can more accurately separate sand and gravel of different particle sizes, thereby improving the accuracy of material separation. At the same time, the design of multi-stage crushing and screening groups also increases the processing capacity and adaptability of the device, enabling it to better meet the production needs of aggregates of different particle sizes.

[0014] In the above-mentioned sand and gravel crushing and screening device, the crushing method of the crushing component is hydraulic crushing, which effectively reduces noise.

[0015] The sand and gravel crushing and screening device as described above further includes a conveying device, through which the sand and gravel are conveyed into the box.

[0016] Specifically, the conveying device includes a bracket arranged on one side of the box body, and a conveyor belt is provided on the bracket. The head end of the conveyor belt is located outside the box body, and the tail end extends into the opening at the top of the box body so that the conveying device can accurately transport sand and gravel to the box body. The sand and gravel crushing and screening device designed in this way has a compact structure and occupies little space.

[0017] For ease of use, movable casters are provided at the bottom of the box and the bracket, and the movable casters are equipped with brakes to facilitate the movement and fixation of the device.

[0018] Furthermore, the conveyor belt includes a horizontal section, an inclined section and a discharge section arranged in sequence at the head and tail. The horizontal section and the inclined section are provided with a number of water leakage holes. A weighing sensor is provided on the bracket on the lower side of the horizontal section, and a water spraying device is provided on the upper span of the inclined section. The weighing sensor is used to weigh the weight of sand and gravel placed on the horizontal section of the conveyor belt. Therefore, the operator can control the water spraying speed of the water spraying device and the conveying speed of the conveyor belt according to the required moisture content of the sand and gravel, thereby obtaining sand and gravel with appropriate moisture content.

[0019] During the sand and gravel crushing process, dry sand and gravel easily produce a large amount of dust, which not only pollutes the environment, but may also affect the health of operators. By increasing the moisture content, it is not only easier to crush, but also can effectively inhibit the generation of dust, thereby improving the working environment and reducing health risks.

[0020] The sand and gravel crushing and screening device as described above also includes a display controller, and the conveying device also includes a conveying motor arranged on the bracket. The conveying motor and the water spraying device are both electrically connected to the display controller. The display controller automatically adjusts the water spraying speed of the water spraying device and the conveying speed of the conveyor belt according to the preset sand and gravel moisture content standard by receiving the sand and gravel weight data transmitted by the weighing sensor to ensure that the sand and gravel always maintain an appropriate moisture content during the processing process, thereby improving the crushing efficiency and quality, reducing dust generation, and improving the working environment.

[0021] The beneficial effect of the utility model is that the screen plate of the utility model is driven to shake by a driving machine, and through the replaceable screen plate design, aggregates of several particle sizes can be obtained under the premise of ensuring the strength of the screen plate, and each particle size of aggregate can be screened by the screen plate with corresponding size of screen holes, and the material separation is accurate. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In the attached figure:

[0023] Figure 1 This is a structural diagram of a sand and gravel crushing and screening device of the utility model;

[0024] Figure 2 for Figure 1 A top view of the box (hiding the top of the box);

[0025] Figure 3 Schematic diagram of the structure of the main frame, crushing assembly and screening assembly (with hidden power source);

[0026] Figure 4 for Figure 3 A second perspective diagram (with hidden side panels);

[0027] Figure 5 is the forward schematic diagram of the driving machine;

[0028] Figure 6 It is a side view of the box;

[0029] Figure 7 It is a structural diagram of a water spray device;

[0030] The components represented by the reference numerals in the figure are:

[0031] 1. Crushing and screening body; 11. Box body; 111. Feeding port; 112. Screen plate replacement port; 12. Main frame; 121. Side plate; 13. Crushing assembly; 14. Screen plate; 15. Slide; 16. Slide rail; 17. Driving machine; 171. Screening motor; 172. Pulley; 173. Rotating wheel; 174. First connecting rod; 175. Second connecting rod; 176. Push rod; 18. Insert rod; 2. Conveying device; 21. Bracket; 22. Conveyor belt; 221. Horizontal section; 222. Inclined section; 223. Discharging section; 23. Weighing sensor; 24. Water spraying device; 241. Sprinkler; 242. Water inlet pipe; 25. Display controller. DETAILED DESCRIPTION

[0032] Combine Figure 1This embodiment provides a sand and gravel crushing and screening device, including a crushing and screening main body 1 and a conveying device 2 on one side thereof. The sand and gravel are transported to the crushing and screening main body 1 through the conveying device 2, and the crushing and screening main body 1 crushes and screens the sand and gravel to finally obtain aggregate of a preset particle size.

[0033] Combine Figure 2 The crushing and screening body 1 includes a box body 11, a feeding port 111 is provided at the top of the box body 11, a discharging port is provided at the bottom, a main frame 12 is provided horizontally inside, and a crushing component 13 and a screening component are arranged up and down on the main frame 12. Through the above structural design, when processing sand and gravel, sand and gravel can enter the box body 11 from the top of the box body 11, and be discharged from the bottom of the box body 11 after crushing and screening. The structure of the device is compact and occupies little space.

[0034] Multiple crushing and screening groups are arranged at intervals above and below the main frame 12. Each crushing and screening group includes a crushing component 13 and a screening component, and the apertures of the multiple screen plates 14 in the multiple crushing and screening groups decrease from top to bottom. Through the above design, the crushing and screening of this device is multi-stage crushing and screening.

[0035] Through step-by-step crushing and screening, sand and gravel are processed to different degrees in each level of crushing and screening group. The higher the degree of crushing, the coarser sand and gravel are screened out in the upper layer, while the finer sand and gravel continue to flow downward into the next level for further screening. This step-by-step screening method can more accurately separate sand and gravel of different particle sizes, thereby improving the accuracy of material separation. At the same time, the design of multi-stage crushing and screening groups also increases the processing capacity and adaptability of the device, enabling it to better meet the production needs of aggregates of different particle sizes.

[0036] In this embodiment, two groups of crushing and screening groups are provided on the main frame 12 at intervals in the upper and lower parts.

[0037] Combine Figure 3 and Figure 4 The crushing method of the crushing component 13 is hydraulic crushing. Two groups are relatively provided on the upper side of the corresponding screen plate 14. They can be crushing plates including a hydraulic telescopic cylinder and its output end. The lower side of the crushing plate is in sliding contact with the screen plate 14 to crush the sand and gravel on the screen plate 14. Of course, the above-mentioned crushing component 13 can also be a hydraulic crushing structure in other existing technologies. The purpose of using hydraulic crushing is to effectively reduce the noise during crushing.

[0038] Combine Figure 2 and Figure 6The screening assembly includes a sieve plate 14 and a driving machine 17 which is transmission-connected to the sieve plate and can drive the sieve plate to shake. The sieve plate 14 is provided with a plurality of sieve holes. A sieve plate replacement port 112 is provided at a position corresponding to the main frame 12 on one side of the box body 11. The main frame 12 includes two slides arranged opposite to each other. The sieve plate 14 passes through the sieve plate replacement port 112 and is inserted between the two slides. Through the above structural design, the operator can design the sieve plate 14 with the corresponding sieve hole size according to the size of the aggregate particle size to be obtained, and replace the corresponding sieve plate 14 during processing to obtain aggregate particle size of the corresponding size, so that aggregate of several particle sizes can be obtained under the premise of ensuring the strength of the sieve plate 14, and the material separation is accurate.

[0039] Combine Figure 4 The slide seat includes a slide 15 and a slide rail 16 slidingly arranged on one side thereof. The driving machine 17 is transmission-connected to the slide rail 16 and is configured to drive the slide rail 16 to slide along the slide 15. The sieve plate 14 is plug-connected to the slide rail 16. When working, the sieve plate 14 can slide back and forth along the slide rail 16 along the slide 15, thereby meeting the strength of the sieve plate 14 and being able to obtain aggregates of various particle sizes while meeting the screening function of the sieve plate 14 and improving the working efficiency of aggregate screening.

[0040] Combine Figure 3 A side plate 121 is provided on one side of the slide 15, and the driving machine 17 includes a push rod 176 and a driving assembly provided on the side plate 121. An avoidance groove is provided on the side plate 121 and the slide 15 along the sliding direction of the slide rail 16. The head end of the push rod 176 is transmission-connected to the driving assembly, and the tail end passes through the avoidance groove and is connected to the slide rail 16. The push rod 176 is driven by the driving assembly to slide along the avoidance groove, so that the screen plate 14 can slide along the avoidance groove with the push rod 176, thereby making the shaking movement of the screen plate 14 more stable.

[0041] In addition, a stop hole is provided on the sieve plate 14, and an insertion rod 18 that can be plugged into the stop hole is spirally provided on the slide rail 16. When the sieve plate 14 is performing screening work, the sieve plate 14 and the slide rail 16 are fixed together by inserting the insertion rod 18, which can improve the working stability of the sieve plate 14. This method is convenient for disassembly and assembly.

[0042] Combine Figure 5The driving assembly includes a pulley 172, two rotating wheels 173 and two connecting rods, as well as a power source for driving the two rotating wheels 173 to rotate. The connecting rod includes a first connecting rod 174 and a second connecting rod 175, one end of which is hingedly connected. The other end of the second connecting rod 175 is hingedly connected to the push rod 176. The other end of the first connecting rod 174 is hingedly connected to the rotating wheel 173 through a hinge shaft, and the hinge shaft is not coaxial with the rotating wheel 173. The two rotating wheels 173 rotate respectively at positions corresponding to the upper and lower screen plates 14 on the side plate 121. The pulley 172 is arranged on the side plate 121 between the two wheels 173. The power source is the screening motor 171, which is arranged outside the box body 11 and drives the pulley 172 to rotate through a belt. The pulley 172 drives the two wheels 173 to rotate through a belt, thereby driving the two push rods 176 to drive the two screen plates 14 to move. Its structural design can not only meet the strength of the screen plate 14, obtain aggregates of various particle sizes and meet the screening function of the screen plate 14, but also has a compact structure and occupies little space.

[0043] Combine Figure 1 and Figure 2 The conveying device 2 includes a bracket 21 arranged on one side of the box body 11, and the bracket 21 is provided with a water spraying device 24, a display controller 25, a conveyor belt 22 and a conveying motor for driving the conveyor belt 22 to perform a conveying action. The water spraying device 24 and the conveying motor are both electrically connected to the display controller 25.

[0044] Specifically, the head end of the conveyor belt 22 is located outside the box body 11, and the tail end extends into the top opening of the box body 11, so that the conveying device 2 can accurately transport sand and gravel to the box body 11. The crushing and screening device of this design has a compact structure and occupies little space.

[0045] Combine Figure 2 and Figure 7 The conveyor belt 22 includes a horizontal section 221, an inclined section 222 and a discharge section 223 arranged in sequence at the head and tail. The horizontal section 221 and the inclined section 222 are provided with a number of water leakage holes. A weighing sensor 23 is provided on the bracket 21 on the lower side of the horizontal section 221. The water spraying device 24 includes two conveying pipes spanning both sides of the inclined section 222 of the conveyor belt 22. The upper sides of the two conveying pipes are connected with a number of nozzles 241 located above the inclined section 222 of the conveyor belt 22. The lower sides of the two conveying pipes are connected with a water inlet pipe 242. The weighing sensor 23 is used to weigh the weight of sand and gravel placed on the horizontal section 221 of the conveyor belt 22. Therefore, the operator can control the water spraying speed of the water spraying device 24 and the conveying speed of the conveyor belt 22 according to the required moisture content of the sand and gravel, thereby obtaining sand and gravel with appropriate moisture content.

[0046] During the sand and gravel crushing process, dry sand and gravel easily produce a large amount of dust, which not only pollutes the environment, but may also affect the health of operators. By increasing the moisture content, it is not only easier to crush, but also can effectively inhibit the generation of dust, thereby improving the working environment and reducing health risks.

[0047] The bottoms of the box 11 and the bracket 21 are both provided with movable casters, and the movable casters are both equipped with brakes to facilitate the movement and fixation of the device.

[0048] When in use, the device is moved to the desired position, and the sieve plate 14 of the desired particle size is inserted into the slide rail 16 through the sieve plate replacement port 112. Then, the screening motor 171, the conveying motor and the display controller 25 are powered on, and the sand and gravel are placed on the horizontal section 221 of the conveyor belt 22. The display controller 25 automatically adjusts the water spraying speed of the water spraying device 24 and the conveying speed of the conveyor belt 22 according to the preset sand and gravel moisture content standard by receiving the sand and gravel weight data transmitted by the weighing sensor 23. Specifically, if the weight of the sand and gravel detected by the weighing sensor 23 is large, the display controller 25 will determine that the moisture content of the sand and gravel may be low. , thereby increasing the water spraying speed of the water spraying device 24 and slowing down the conveying speed of the conveyor belt 22 to ensure that the sand and gravel reach a suitable moisture content during the crushing process. On the contrary, if the weight of the sand and gravel detected by the weighing sensor 23 is small, the display controller 25 will judge that the moisture content of the sand and gravel may be too high, thereby reducing the water spraying speed of the water spraying device 24 and speeding up the conveying speed of the conveyor belt 22 to avoid the sand and gravel being too wet and affecting the crushing effect. Through this intelligent control method, it can be ensured that the sand and gravel always maintain a suitable moisture content during the processing process, improve the crushing efficiency and quality, reduce dust generation, and improve the working environment.

Claims

1. A sand and gravel crushing and screening device, characterized in that: It comprises a box body (11), a top end of which is provided with a material inlet (111), a bottom end of which is provided with a material outlet, a main frame (12) disposed laterally inside, and a crushing assembly (13) and a screening assembly disposed up and down on the main frame (12); The screening assembly comprises a screen plate (14) and a driving machine (17) connected thereto and capable of driving the screen plate to shake, wherein the screen plate (14) is provided with a plurality of screen holes; A sieve plate replacement opening (112) is provided on one side of the box body (11) at a position corresponding to the main frame (12); the main frame (12) includes two slides arranged opposite to each other; the sieve plate (14) passes through the sieve plate replacement opening (112) and is inserted between the two slides.

2. A sand and gravel crushing and screening device according to claim 1, characterized in that: The slide seat comprises a slide frame (15) and a slide rail (16) slidably arranged on one side thereof; The driving machine (17) is in transmission connection with the slide rail (16) and is configured to drive the slide rail (16) to slide along the slide frame (15). The sieve plate (14) is plug-connected with the slide rail (16).

3. A sand and gravel crushing and screening device according to claim 2, characterized in that: A side plate (121) is provided on one side of the slide (15), and the driving machine (17) includes a push rod (176) and a driving assembly provided on the side plate (121); The side plate (121) and the slide (15) are provided with an avoidance groove along the sliding direction of the slide rail (16); the head end of the push rod (176) is connected to the driving assembly in a transmission manner, and the tail end passes through the avoidance groove and is connected to the slide rail (16); the push rod (176) is driven by the driving assembly to slide along the avoidance groove.

4. The sand and gravel crushing and screening device according to claim 3, characterized in that: A stop hole is provided on the sieve plate (14), and an inserting rod (18) capable of being plugged into and matched with the stop hole is spirally provided on the slide rail (16).

5. The sand and gravel crushing and screening device according to claim 4, characterized in that: The driving assembly includes a rotating wheel (173), a connecting rod, and a power source for driving the rotating wheel (173) to rotate; The tail end of the connecting rod is hinged to the push rod (176), and the head end is hinged to the rotating wheel (173) through a hinge shaft, and the hinge shaft and the rotating wheel (173) are not coaxial.

6. A sand and gravel crushing and screening device according to any one of claims 1 to 5, characterized in that: It also includes a bracket (21) arranged on one side of the box body (11), and a conveyor belt (22) is provided on the bracket (21), the head end of which is located outside the box body (11) and the tail end extends into the top opening of the box body (11).

7. The sand and gravel crushing and screening device according to claim 6, characterized in that: The conveyor belt (22) includes a horizontal section (221), an inclined section (222) and a discharging section, which are sequentially arranged at the head and tail. The horizontal section (221) and the inclined section (222) are provided with a plurality of water leakage holes. A weighing sensor (23) is provided on the bracket (21) on the lower side of the horizontal section (221), and a water spray device (24) is provided across the inclined section (222).

8. The sand and gravel crushing and screening device according to claim 7, characterized in that: The bottoms of the box (11) and the bracket (21) are both provided with movable casters.

9. The sand and gravel crushing and screening device according to claim 6, characterized in that: A plurality of crushing and screening groups are arranged at intervals above and below the main frame (12), the crushing and screening groups comprising a crushing assembly (13) and a screening assembly, and the sieve apertures of the plurality of sieve plates (14) in the plurality of crushing and screening groups decrease in sequence from top to bottom.

10. The sand and gravel crushing and screening device according to claim 6, characterized in that: The crushing method of the crushing component (13) is hydraulic crushing.

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