Raw material crushing device for high durability concrete

Abstract

The utility model relates to concrete crushing technical field, and disclose a kind of raw material crushing device for high durability concrete preparation, including base frame, and the fixed connection of base frame has crushing bin, the bottom two sides of crushing bin are fixed with guide plate, the top of crushing bin is connected with feed hopper, the rotation connection of crushing bin has shaft one and shaft two, the outer ring of shaft one and shaft two is respectively fixedly connected with crushing roller one and crushing roller two, the lower portion of crushing bin is equipped with screening assembly, and the sliding rod of screening assembly includes the sliding connection in the both sides of crushing bin, the fixed protruding rod of sliding rod top is fixed, the side wall of crushing bin is fixedly connected with two fixed plates, and the rotation connection of two fixed plates between is rotatable rod. The utility model can conveniently re-feed into feed hopper for secondary crushing of unqualified raw material, realizes the circulating crushing of raw material, and further guarantees the crushing quality and utilization rate of raw material.

Description

Technical Field

[0001] This utility model relates to the field of concrete crushing technology, specifically to a raw material crushing device for high-durability concrete production. Background Technology

[0002] Raw material crushing devices for high-durability concrete preparation typically refer to equipment used to crush and pulverize hard materials in raw materials. Their main purpose is to break the raw materials into particle sizes and textures suitable for concrete preparation, ensuring the quality and performance of the concrete. The preparation of high-durability concrete requires raw materials to have specific particle size and texture requirements; therefore, raw material crushing devices play a crucial role in the concrete preparation process. The selection of an appropriate type of crushing device depends on the hardness, particle size, and production needs of the raw materials. The use of these devices helps ensure the quality, strength, and durability of the concrete.

[0003] For example, a concrete raw material crusher with application number CN202322506151.1 includes a machine body and a crushing device. A conveying frame is fixedly installed on one side of the machine body, and a feeding frame is fixedly installed inside the conveying frame. A fixed frame is fixedly installed on the other side of the machine body. A base plate is fixedly installed at the bottom of the machine body, and a connecting plate is fixedly installed at the bottom of the base plate. The crushing device includes a conveying auger. A motor is installed inside the fixed frame. The output end of the motor is fixedly connected to a coaxial rotating shaft through a coupling. A turntable is fixedly sleeved on the outer circumference of the rotating shaft. Through the arrangement of the conveying auger and motor, the motor is started first, and the material is poured into the feeding frame. It is then conveyed to the crushing frame by the conveying auger for crushing. The crushed material is discharged from the discharge frame, which solves the problem of low working efficiency.

[0004] The aforementioned patent achieves the functions of conveying and crushing raw materials through the design of structures such as conveying augers and motors. However, the crushed material is discharged directly from the discharge frame without an effective screening process, making it impossible to screen the particle size of the crushed raw materials. This results in the crushed raw materials possibly containing large particles that do not meet the requirements, directly affecting the production quality of subsequent concrete. Furthermore, during the crushing process, friction and collision between materials generate a large amount of dust. This dust not only spreads into the surrounding environment, affecting the health of workers, but may also adhere to equipment parts, accelerating equipment wear and shortening the equipment's service life.

[0005] Therefore, we propose a raw material crushing device for high-durability concrete production to solve the problems mentioned above. Utility Model Content

[0006] The purpose of this utility model is to provide a high-durability concrete raw material crushing device to solve the problems mentioned in the background art, namely, that existing crushing devices cannot screen the particle size of raw materials, resulting in the raw materials after crushing being mixed with large particles that do not meet the requirements, which affects the quality of subsequent concrete production. In addition, the crushing process generates a large amount of dust due to friction and collision, which not only pollutes the environment and endangers the health of operators, but also accelerates equipment wear and shortens its service life.

[0007] To achieve the above objectives, the present invention provides the following technical solution: a raw material crushing device for high-durability concrete production, comprising a base frame, a crushing chamber fixedly connected to the base frame, guide plates symmetrically fixed on both sides of the bottom of the crushing chamber, a feed hopper connected to the top of the crushing chamber, a rotating shaft one and a rotating shaft two rotatably connected inside the crushing chamber, and a crushing roller one and a crushing roller two fixedly connected to the outer rings of the rotating shaft one and the rotating shaft two, respectively;

[0008] A screening assembly is installed below the crushing chamber. The screening assembly includes sliding rods slidably connected to both sides of the crushing chamber. A fixing protrusion is fixed to the top of the sliding rod. Two fixing plates are fixedly connected to the side wall of the crushing chamber. A rotating rod is rotatably connected between the two fixing plates. An impact protrusion is fixedly sleeved on the rotating rod. An installation block is fixedly connected to the outer ring of the sliding rod. A slot is opened on the bottom side wall of the installation block. A locking block is locked in the slot. A screening hopper is fixedly connected to the bottom of the locking block.

[0009] Preferably, a motor is fixedly connected to the base frame, a coupling is fixedly connected to the output end of the motor, a pulley is fixedly sleeved on the outer ring of the coupling, a pulley is fixedly connected to the outer ring of the shaft, and a belt is wound between the pulley and the pulley.

[0010] Preferably, a first transmission gear is fixedly connected to the outer ring of the first rotating shaft, and a second transmission gear is fixedly connected to the outer ring of the second rotating shaft, wherein the first transmission gear and the second transmission gear mesh with each other.

[0011] Preferably, a connecting shaft is fixedly connected to the end side of the second rotating shaft, a helical gear is fixedly connected to the outer ring of the connecting shaft, and a helical gear is fixedly sleeved on the outer ring of the rotating rod, with the helical gear and the helical gear meshing with each other.

[0012] Preferably, the outer ring of the slide rod is fitted with a spring, and the two ends of the spring are fixedly connected to the side wall of the mounting block and the crushing chamber, respectively, and the shape of the locking block matches the shape of the locking groove.

[0013] Preferably, a fixing block is fixedly connected to the feed hopper, two fixing blocks are symmetrically arranged, a water pipe is installed between the two fixing blocks, a flexible hose is connected to the end of the water pipe, and multiple atomizing nozzles are connected to the water pipe.

[0014] Compared with the prior art, the beneficial effects of this utility model are:

[0015] 1. This utility model integrates the crushing component and the screening component into one unit. The crushed raw material directly enters the screening hopper for screening via the guide plate, eliminating the need for additional conveying equipment for transfer. This reduces production steps, lowers the loss of raw materials during transfer, and significantly improves overall production efficiency. At the same time, after the screening hopper vibrates and screens, unqualified raw materials can be easily fed back into the feed hopper for secondary crushing, realizing the recycling of raw materials and further ensuring the crushing quality and utilization rate of raw materials. Furthermore, the vibration method promotes full movement of raw materials in the screening hopper, accelerating the speed at which raw materials meeting the particle size requirements pass through the screen, improving screening efficiency, and providing good separation effect, effectively distinguishing between qualified and unqualified raw materials.

[0016] 2. This utility model is equipped with an atomizing nozzle to atomize water into fine water droplets. When the raw material enters the crushing chamber, the water mist can moisten the raw material, reduce the dust generated by friction and collision during the crushing process, and at the same time adsorb dust particles in the air to prevent dust from spreading to the surrounding environment, effectively improving the working environment and protecting the health of the operators. In addition, the water mist can also play a certain role in cooling the inside of the crushing chamber, reducing the impact of frictional heat on the crushing roller and the properties of the raw material. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall three-dimensional structure of the present invention. Figure 1 ;

[0018] Figure 2 This is a schematic diagram of the overall three-dimensional structure of the present invention. Figure 2 ;

[0019] Figure 3 This is a schematic diagram of the screening component structure of this utility model;

[0020] Figure 4 This is a schematic diagram of some components of the screening assembly of this utility model.

[0021] In the diagram: 1. Base frame; 2. Crushing chamber; 21. Guide plate; 3. Feed hopper; 4. Motor; 5. Coupling; 6. Pulley 1; 7. Belt; 8. Pulley 2; 9. Shaft 1; 91. Shaft 2; 10. Transmission gear 1; 11. Crushing roller 1; 12. Transmission gear 2; 13. Crushing roller 2; 14. Screening assembly; 141. Connecting shaft; 142. Helical gear 1; 143. Fixing plate; 144. Rotating rod; 145. Helical gear 2; 146. Slide rod; 461. Fixing protrusion; 462. Impact protrusion; 147. Spring; 148. Mounting block; 481. Slot; 149. Screening hopper; 491. Locking block; 15. Fixing block; 16. Water pipe; 17. Atomizing nozzle; 18. Hose. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0023] Example 1: Please refer to Figure 1 - Figure 4 A high-durability concrete raw material crushing device includes a base frame 1, a crushing chamber 2 fixedly connected to the base frame 1, and guide plates 21 symmetrically fixed on both sides of the bottom of the crushing chamber 2. The guide plates 21 can guide the material to enter the screening hopper 149 stably. The top of the crushing chamber 2 is connected to the feed hopper 3. Rotary shaft 9 and rotating shaft 91 are rotatably connected inside the crushing chamber 2. Crushing roller 11 and crushing roller 23 are fixedly connected to the outer ring of rotating shaft 9 and rotating shaft 2 91, respectively. High-chromium cast iron tooth blocks are embedded on the surface of crushing roller 11 and crushing roller 2 13, and the tooth blocks of the two sets of crushing rollers are staggered to maximize the crushing and shearing effect.

[0024] A transmission gear 10 is fixedly connected to the outer ring of a rotating shaft 9, and a transmission gear 12 is fixedly connected to the outer ring of a rotating shaft 91. The transmission gear 10 and the transmission gear 12 mesh with each other. A connecting shaft 141 is fixedly connected to the end side of the rotating shaft 91. A helical gear 142 is fixedly connected to the outer ring of the connecting shaft 141. A helical gear 145 is fixedly sleeved on the outer ring of the rotating rod 144. The helical gear 142 and the helical gear 145 mesh with each other.

[0025] A screening assembly 14 is installed below the crushing chamber 2. The screening assembly 14 includes sliding rods 146 slidably connected to both sides of the crushing chamber 2. A fixing protrusion 461 is fixed to the top of the sliding rods 146. Two fixing plates 143 are fixedly connected to the side wall of the crushing chamber 2. A rotating rod 144 is rotatably connected between the two fixing plates 143. An impact protrusion 462 is fixedly sleeved on the rotating rod 144. An installation block 148 is fixedly connected to the outer ring of the sliding rods 146. A slot 481 is opened on the bottom side wall of the installation block 148. A locking block 491 is locked in the slot 481. A screening hopper 149 is fixedly connected to the bottom of the locking block 491. A collection box can be placed on the base frame 1, which facilitates the collection and processing of the screened concrete raw materials by the workers.

[0026] A motor 4 is fixedly connected to the base frame 1. A coupling 5 is fixedly connected to the output end of the motor 4. A pulley 6 is fixedly sleeved on the outer ring of the coupling 5. A pulley 8 is fixedly connected to the outer ring of the rotating shaft 9. A belt 7 is wound between pulley 6 and pulley 8. A spring 147 is sleeved on the outer ring of the slide rod 146. The two ends of the spring 147 are fixedly connected to the mounting block 148 and the side wall of the crushing chamber 2, respectively. The shape of the locking block 491 matches that of the locking groove 481. The locking block 491 and the locking groove 481 adopt a T-shaped structure. An elastic positioning bead is provided on the top of the locking block 491. It can quickly lock the screening hopper 149 by cooperating with the positioning hole on the inner wall of the locking groove 481. This is existing technology and will not be described in detail.

[0027] Specifically, when using this device to crush concrete raw materials, the motor 4 is started first. The motor 4 drives the coupling 5 to rotate, and the pulley 6 fixed at the end of the coupling 5 rotates synchronously. The pulley 6 drives the pulley 8 to rotate through the belt 7, which in turn causes the shaft 9 to rotate synchronously. Since the transmission gear 10 and the transmission gear 12 mesh with each other, the rotation of the shaft 9 will drive the shaft 91 to rotate in the opposite direction, realizing the opposite rotation of the crushing roller 11 and the crushing roller 13. At the same time, the connecting shaft 141 at the end of the shaft 91 drives the helical gear 142 to rotate. Through the meshing transmission with the helical gear 145, the power is transmitted to the rotating rod 144, causing the rotating rod 144 to rotate at a certain speed.

[0028] Then, the concrete raw material to be crushed is poured into the feed hopper 3 and falls into the crushing chamber 2. During the process of the concrete raw material entering the crushing chamber 2, under the opposing rotation of crushing roller 11 and crushing roller 23, the raw material is crushed by the shearing force and extrusion force between the two crushing rollers. Due to the staggered distribution of the toothed blocks on the surface of the crushing roller, the raw material can be crushed in multiple directions, crushing large pieces of raw material into fragments that meet the initial particle size requirements. The crushed raw material falls under the action of gravity and is guided by the guide plate 21 to the screening hopper 149 below.

[0029] Furthermore, during the rotation of the second rotating shaft 91, since the second rotating shaft 91 is fixedly connected to the connecting shaft 141, and the first helical gear 142 is fixedly connected to the connecting shaft 141, the connecting shaft 141 and the first helical gear 142 rotate synchronously during the rotation of the second rotating shaft 91. During the rotation of the first helical gear 142, since the first helical gear 142 meshes with the second helical gear 145, the second helical gear 145 drives the intermediate rotating rod 144 to rotate synchronously. During the rotation of the rotating rod 144, its external impact protrusion 462 will rotate synchronously. During rotation, the impact protrusion 462 will periodically contact the fixed protrusion 461 at the top of the slide rod 146 and generate an impact force. When the impact protrusion 462 impacts the fixed protrusion 461, the slide rod 146 will... The spring 147 slides horizontally due to its elastic force. When the impact protrusion 462 separates from the fixed protrusion 461, the restoring force of the spring 147 will drive the slide rod 146 to return to its original position and slide. This causes the slide rod 146 to drive the mounting block 148 and the screening hopper 149 to perform horizontal reciprocating motion, which causes the screening hopper 149 to vibrate and screen. During the vibration of the screening hopper 149, the raw materials that meet the particle size requirements will fall through the screen mesh into the collection box below the base frame 1, while the raw materials that exceed the particle size requirements will remain in the screening hopper 149 and can be manually fed back into the feed hopper 3 for secondary crushing. The above steps are repeated to make the crushing of concrete raw materials more uniform and improve its crushing quality. In addition, the spring 147 not only plays a restoring role during the vibration, but also buffers the impact force, reducing the vibration noise of the equipment and the wear of parts.

[0030] When it is necessary to refill the crushing chamber 2 with raw materials that exceed the particle size limit for crushing, replace screens of different specifications, or clean the screening hopper 149, the screening hopper 149 can be pulled down directly to separate the locking block 491 from the locking groove 481, and the screening hopper 149 can be removed for operation. During installation, simply align the locking block 491 with the locking groove 481 and push it in to lock it, which improves the maintenance efficiency of the equipment.

[0031] Example 2: This example is an improvement upon Example 1. For details, please refer to [link / reference]. Figure 1 - Figure 2 A fixing block 15 is fixedly connected to the feed hopper 3. Two fixing blocks 15 are symmetrically arranged, and a water pipe 16 is installed between the two fixing blocks 15. A flexible hose 18 is connected to one end of the water pipe 16, and multiple atomizing nozzles 17 are connected to the water pipe 16. The atomizing nozzles 17 on the water pipe 16 are evenly distributed, and the atomization direction of the nozzles is obliquely towards the inside of the feed hopper 3, forming an angle with the inner wall of the feed hopper 3, to ensure that the atomized water can evenly cover the raw materials in the feed hopper 3.

[0032] During the crushing process, dust is generated. To prevent dust from splashing and affecting the environment, the external water supply equipment is first connected to the hose 18 during crushing. After connection, water is delivered to the hose 18 through the external water supply and high-pressure water is delivered to the water pipe 16. After the water flows through the hose 18 into the water pipe 16, it is sprayed out through each atomizing nozzle 17 under pressure. Due to the special structure of the atomizing nozzle 17, the water flow is dispersed into fine mist droplets, forming a uniform water mist.

[0033] When concrete raw materials enter the crushing chamber 2 through the feed hopper 3, the water mist sprayed from the atomizing nozzle 17 will come into contact with the surface of the raw materials. On the one hand, it can moisten the raw materials and reduce the dust generated by friction and collision during the crushing process; on the other hand, the water mist can adsorb dust particles in the air, causing the dust particles to settle due to the increase in weight, thus preventing the dust from spreading to the surrounding environment and improving the working environment.

[0034] During the crushing process, the wetted raw materials exhibit slightly increased adhesion between particles, reducing the splashing of fine particles. Simultaneously, moderate wetting makes the raw materials easier to crush under the action of the crushing rollers, improving crushing efficiency. Furthermore, the water mist also has a cooling effect on the interior of the crushing chamber 2, reducing the impact of heat generated by friction on the crushing rollers and the properties of the raw materials.

[0035] The contents not described in detail in this specification are existing technologies known to those skilled in the art.

[0036] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A raw material crushing device for high durability concrete production, comprising a base frame (1), characterized in that: The base frame (1) is fixedly connected to a crushing chamber (2). The bottom sides of the crushing chamber (2) are symmetrically fixed with guide plates (21). The top of the crushing chamber (2) is connected to a feed hopper (3). The crushing chamber (2) is rotatably connected with a rotating shaft one (9) and a rotating shaft two (91). The outer rings of the rotating shaft one (9) and the rotating shaft two (91) are respectively fixedly connected with crushing roller one (11) and crushing roller two (13). A screening assembly (14) is installed below the crushing chamber (2). The screening assembly (14) includes a slide rod (146) slidably connected to both sides of the crushing chamber (2). A fixed protrusion (461) is fixed on the top of the slide rod (146). Two fixed plates (143) are fixedly connected to the side wall of the crushing chamber (2). A rotating rod (144) is rotatably connected between the two fixed plates (143). An impact protrusion (462) is fixedly sleeved on the rotating rod (144). An installation block (148) is fixedly connected to the outer ring of the slide rod (146). A slot (481) is opened on the bottom side wall of the installation block (148). A locking block (491) is locked in the slot (481). A screening hopper (149) is fixedly connected to the bottom of the locking block (491).

2. A raw material crushing device for producing a high durability concrete according to claim 1, characterized in that: A motor (4) is fixedly connected to the base frame (1). A coupling (5) is fixedly connected to the output end of the motor (4). A pulley (6) is fixedly sleeved on the outer ring of the coupling (5). A pulley (8) is fixedly connected to the outer ring of the shaft (9). A belt (7) is wound between the pulley (6) and the pulley (8).

3. The raw material crushing device for high-durability concrete production according to claim 2, characterized in that: The outer ring of the first rotating shaft (9) is fixedly connected to the first transmission gear (10), and the outer ring of the second rotating shaft (91) is fixedly connected to the second transmission gear (12). The first transmission gear (10) and the second transmission gear (12) mesh with each other.

4. The raw material crushing device for high-durability concrete production according to claim 1, characterized in that: The end of the rotating shaft 2 (91) is fixedly connected to a connecting shaft (141), the outer ring of the connecting shaft (141) is fixedly connected to a helical gear 1 (142), the outer ring of the rotating rod (144) is fixedly sleeved with a helical gear 2 (145), and the helical gear 1 (142) and the helical gear 2 (145) mesh with each other.

5. The raw material crushing device for high-durability concrete production according to claim 4, characterized in that: The outer ring of the slide rod (146) is fitted with a spring (147), and the two ends of the spring (147) are fixedly connected to the side wall of the mounting block (148) and the crushing chamber (2) respectively. The shape of the locking block (491) matches that of the locking groove (481).

6. The raw material crushing device for high-durability concrete production according to claim 1, characterized in that: A fixed block (15) is fixedly connected to the feed hopper (3). Two fixed blocks (15) are symmetrically arranged. A water pipe (16) is installed between the two fixed blocks (15). A flexible hose (18) is connected to the end of the water pipe (16). Multiple atomizing nozzles (17) are connected to the water pipe (16).

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