Raw material crushing device for concrete pipe production

Abstract

This utility model relates to the field of concrete pipe production technology, specifically to a raw material crushing device for concrete pipe production. The device comprises multiple sets of parallel, spaced rotating discs, with four freely swinging hammers hinged to the edges of each disc via pins. Replaceable toothed blocks are embedded in the striking surfaces of the swinging hammers and secured with bolts. A support shaft is fixed at the center of the rotating discs, with both ends of the support shaft mounted in rotating bearings. The outer ring of the bearings is embedded between arc-shaped rings on both sides of the connection between the feed hopper and the support hopper. The feed hopper is fixed to the top of the support hopper. After entering, the material is initially crushed by the toothed blocks of the swinging hammers, and the splashed material is further crushed by impacting the sawtooth blocks inside the feed hopper. The crushed material falls to an arc-shaped filter screen plate close to the trajectory of the swinging hammers for screening, and qualified material is discharged through an inclined chute at the base. This utility model maintains crushing efficiency through replaceable toothed blocks, achieving efficient and stable crushing.

Description

Technical Field

[0001] This utility model relates to the field of concrete pipe production technology, and in particular to a raw material crushing device for concrete pipe production. Background Technology

[0002] ① In traditional concrete pipe production, raw material crushing mainly relies on manual hammering or simple mechanical compaction. Operators need to repeatedly strike large pieces of raw material with heavy hammers, which is not only extremely labor-intensive but also limits crushing efficiency to human strength. There is a high risk of raw material splashing during the crushing process, and particle size control depends entirely on experience, easily leading to problems such as uneven particle size and dust dispersion. Its core drawback is that manual crushing methods have efficiency bottlenecks and safety risks, and cannot meet the raw material processing needs of continuous production.

[0003] ② To improve crushing efficiency, the industry has introduced mechanized hammering equipment; a representative solution uses a motor-driven rotating shaft with metal hammers hinged to it. After the motor starts, the high-speed rotating hammers are thrown out under centrifugal force, violently hammering the raw material falling from the feed hopper; the raw material is crushed under the continuous impact of the hammers, achieving automatic crushing instead of manual labor. This technology replaces manual labor with mechanized swinging hammering, significantly increasing the throughput per unit time and solving the problem of low manual efficiency.

[0004] ③ However, the long-term impact of the hammer blades on hard materials leads to severe wear on their working surfaces. After wear, the hammer surface tends to be smooth, making it easy for the hammer blades to slip on the material surface during hammering, and the impact energy cannot be fully transmitted (reduced collision efficiency). More seriously, uneven wear under high-speed hammering can cause local deformation and instability of the hammer blades. The deviated swing trajectory of the deformed hammer blades exacerbates equipment vibration and may even cause abnormal bearing loads (structural deformation risk). The reduction in crushing efficiency caused by the smooth hammer surface and the deterioration of equipment stability caused by the deformed hammer blades have become new obstacles restricting the development of mechanized crushing technology. Utility Model Content

[0005] The purpose of this utility model is to provide a raw material crushing device for concrete pipe production, which solves the problems of reduced hammer energy transmission efficiency caused by wear of the hammer blade working surface and deterioration of equipment operation stability caused by deformation of the hammer blade due to uneven wear.

[0006] To achieve the above objectives, this utility model provides a raw material crushing device for concrete pipe production, comprising multiple sets of spaced rotating discs. Four swing hammers are respectively installed between the edges of the rotating discs via pins. The hammering surfaces of the swing hammers are embedded with toothed blocks and fixed with bolts. A support shaft is fixed through the center of the rotating discs. Both ends of the support shaft are respectively fixed through rotating bearings. The rotating bearings are respectively embedded between two arc-shaped rings. The arc-shaped rings are respectively fixedly installed at the middle of the connection between the feed hopper and the support hopper on both sides. The feed hopper is installed at the top of the support hopper by bolts.

[0007] The feed hopper has an annular chamber inside, and several serrated blocks are provided on the side wall of the annular chamber opposite to the direction of the swing hammer. The support hopper has a discharge chamber inside, and an arc-shaped filter screen is installed vertically below the discharge chamber by bolts, close to the edge of the swing hammer's movement path.

[0008] One end of the support shaft passes through a rotating bearing and extends to a large belt reel. A transmission belt is movably installed inside the large belt reel, and the end of the transmission belt away from the large belt reel is movably installed inside a small belt reel.

[0009] The small belt reel is fixedly installed at the end of the drive shaft, and the end of the drive shaft away from the small belt reel is located at the output end of the drive motor. The drive motor and the support bucket are respectively installed on the top of the base plate by bolts.

[0010] The base plate is fixedly installed at the bottom end, and a sloping chute is opened on one side of the base. The sloping chute extends into the base and connects with the base plate, so that the base forms a material discharge structure.

[0011] The base plate is fixedly installed at the top, and several diagonal bracing plates are welded to the connection between the fixed plate and the two sides of the base to form a triangular support. Fixing holes are opened at the four corners of the fixed plate.

[0012] This utility model discloses a raw material crushing device for concrete pipe production. Its core utilizes multiple sets of parallel, spaced rotating discs as the power carrier. Each rotating disc has four freely swinging hammers hinged to its edge via pins. This hinged design gives the hammers autonomous swing characteristics under centrifugal force, significantly expanding the hammering coverage area. The hammers' working surfaces are innovatively embedded with angular toothed blocks, secured with bolts to form independently replaceable, wear-resistant striking units. A central through-hole of the rotating discs passes through a fixed support shaft, serving as the central axis of rotation. The two ends of this support shaft are rigidly connected to the inner rings of bearings, while the outer rings are integrally embedded between two arc-shaped bearing rings. These two arc-shaped bearing rings are directly welded to the middle of the connection between the feed hopper and the side walls of the support hopper, converting the rotational system load into internal stress in the hopper structure. The feed hopper is bolted to the top of the support hopper, forming a continuous feeding channel to ensure that the material falls vertically into the effective striking area of ​​the rotating hammers.

[0013] When the drive source rotates the support shaft, multiple rotating discs rotate synchronously, causing the hammer to expand radially under centrifugal force. The blocky raw material entering the equipment is first struck head-on by the high-speed swinging hammer surface, and the sharp angles of the toothed blocks embed into the material to generate powerful shearing and crushing. The key improvement lies in the modular assembly of the toothed blocks and the hammer, which can be replaced individually after the teeth wear, always maintaining the crushing edge shape of the hammering surface. When the hinged hammer swings freely, it automatically corrects the material impact reaction force, avoiding the deformation accumulation caused by rigid connection. The support shaft, through the embedded cooperation of bearings and arc-shaped bearing rings, directly transmits the rotational load to the rigid connection between the feed hopper and the support hopper, significantly enhancing the bending stiffness of the shaft system. This structure allows the vibration energy generated by the hammering to be absorbed and dissipated by the main structure, avoiding bearing stress concentration that could cause the support shaft to deflect. The bolted connection between the feed hopper and the support hopper forms a stable cavity, ensuring that the material falls accurately to the effective stroke of the hammer. The entire collaborative structure not only ensures high-frequency and high-efficiency hammering and crushing, but also solves the problems of wear deformation and vibration instability through stress path optimization. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below.

[0015] Figure 1 This is a schematic diagram of the right side structure of an embodiment of the present invention.

[0016] Figure 2 This is a schematic diagram of the left-side structure of an embodiment of this utility model.

[0017] Figure 3 This is a structural schematic diagram of the base of an embodiment of this utility model.

[0018] Figure 4 This is a schematic diagram of the planar structure of the rotating disk in an embodiment of this utility model.

[0019] In the diagram: 101, rotating disk; 102, swing hammer; 103, toothed block; 104, support shaft; 105, rotating bearing; 106, arc-shaped ring; 107, feed hopper; 108, support hopper; 109, annular chamber; 110, sawtooth block; 111, discharge chamber; 112, arc-shaped filter screen; 113, large belt reel; 114, transmission belt; 115, small belt reel; 116, drive shaft; 117, drive motor; 118, base plate; 119, base; 120, inclined chute; 121, fixing plate; 122, inclined brace plate; 123, fixing hole. Detailed Implementation

[0020] The embodiments of the present invention are described in detail below. Examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, but should not be construed as limiting the present invention.

[0021] Please see Figures 1-4 .

[0022] This utility model provides a raw material crushing device for concrete pipe production. A feeding hopper 107 is installed at the top and is fixed to the top of a support hopper 108 by bolts to form a continuous material channel. The feeding hopper 107 has an annular chamber 109 inside. Several sawtooth blocks 110 are distributed on the inner wall of the annular chamber 109 opposite to the hammering direction of the swing hammer 102. These blocks are used to receive the material that is initially thrown and crush it by collision. The support hopper 108 is located below the feeding hopper 107 and has a discharge chamber 111 inside. An arc-shaped filter screen 112 is installed vertically below this chamber by bolts. The arc-shaped working surface of the arc-shaped filter screen 112 is set close to the edge of the end of the rotation trajectory of the swing hammer 102. This close-fitting layout intercepts oversized particles and receives real-time supplementary crushing from the swing hammer 102.

[0023] Multiple sets of parallel, spaced rotating disks 101 are fixed through the middle of the support shaft 104. Both ends of the support shaft 104 are fixed through and to the inner ring of the rotating bearing 105. In the key support structure, the outer ring of the rotating bearing 105 is embedded between two arc-shaped rings 106. These two arc-shaped rings 106 are welded and fixed at the center of the connection between the feed hopper 107 and the support hopper 108 on both sides, so that the load of the rotating system is directly transmitted to the main structural frame, significantly enhancing the torsional stiffness. Four freely swinging hammers 102 are symmetrically installed on the edge circumference of each rotating disk 101 through pins. The hammering surface of the swing hammer 102 is fitted with angular toothed blocks 103 and fixed by bolts. This detachable design allows the worn toothed blocks 103 to be replaced individually while retaining the hammer body.

[0024] One end of the support shaft 104 extends a rotating bearing 105 and fixes a large belt reel 113. The large belt reel 113 is connected to a small belt reel 115 via a transmission belt 114 to form a reduction transmission chain. The small belt reel 115 is fixed to the end of the drive shaft 116. The other end of the drive shaft 116 is directly connected to the output shaft of the drive motor 117 to provide a power source. The drive motor 117 and the bottom of the support bucket 108 are both bolted to the top surface of the base plate 118 to ensure a stable connection between the power unit and the crushing chamber. The bottom end of the base plate 118 is integrally fixed to the base 119. An inclined chute 120 is opened on one side of the base 119. The inclined chute 120 extends upward into the interior of the base 119 and penetrates the base plate 118 to form an inclined discharge channel.

[0025] A fixing plate 121 is also vertically installed on the top surface of the base plate 118. Fixing holes 123 are reserved at the four corners of the fixing plate 121 for equipment anchoring. Multiple diagonal bracing plates 122 are welded between the bottom sides of the fixing plate 121 and the side wall of the base 119. The diagonal bracing plates 122, the base 119, and the fixing plate 121 form a triangular support structure, which effectively absorbs the crushing impact and suppresses the vibration of the whole machine. In operation, the drive motor 117 drives the support shaft 104 via the drive shaft 116, small belt disc 115, transmission belt 114, and large belt disc 113, causing multiple sets of rotating discs 101 to rotate synchronously at high speed. The swing hammer 102 unfolds under the action of centrifugal force, and its toothed blocks 103 directly hammer the raw material to achieve primary crushing. The ejected material impacts the sawtooth blocks 110 of the annular chamber 109 to complete secondary crushing. The continuously crushed material falls to the arc-shaped filter screen 112 for grading. Qualified particles pass through the mesh and are discharged through the inclined chute 120. Oversized particles are forcibly crushed by the nearby swing hammer 102, achieving efficient and controllable continuous crushing operation.

[0026] Working principle: Material falls into the device from the top feed hopper 107, first entering the area at the bottom of the feed hopper 107. Here, the high-speed rotating disc 101 directly impacts and crushes the material through four swing hammers 102 fixed on its edge pins. As the disc 101 rotates under drive, the swing hammers 102 swing outward under centrifugal force. The toothed blocks 103 firmly embedded in their hammering surfaces and fixed with bolts violently impact the blocky material, using strong impact force to initially crush it. This powerful initial hammer blow not only shatters the material, but the impact force also instantly propels many of the struck materials (especially fragments) at high speed, sending them flying towards the side wall of the annular chamber 109 inside the feed hopper 107. The serrated blocks 110, positioned on the side wall of the annular chamber 109 facing the direction of the hammer blow from the swing hammer 102, now play a crucial role; these flying material fragments impacting the side wall heavily strike these serrated blocks 110, and the edges of the serrated blocks 110 effectively scrape the material. The material is shaved, cut, and further crushed by impact, resulting in secondary crushing of the material initially ejected. The annular chamber 109 and the serrated block 110 are positioned to receive and utilize the impact energy generated by the initial hammering. The forced collision significantly improves the crushing strength and efficiency, which is particularly helpful in breaking tough or large material blocks. Under the continuous rotation and oscillation of the swing hammer 102, the material in the area below the feed hopper 107 undergoes direct hammering and secondary crushing, as well as being ejected and impacting the serrated block 110. The two crushing methods work together, and the material is repeatedly struck and collided with, continuously refining it. After thorough crushing, the material with smaller particle size continues to fall downwards under the action of gravity, passing through the area of ​​the rotating disk 101 and the swing hammer 102, and entering the discharge chamber 111 inside the support hopper 108. Vertically below the discharge chamber 111, an arc-shaped filter screen is bolted on. The arc surface of this filter screen is carefully set, and its position is very close to the outer edge of the rotational movement path of the swing hammer 102.When the finely crushed material that meets the required particle size falls onto the arc-shaped filter screen 112, it can pass through the mesh smoothly, while larger particles that do not meet the particle size requirements are intercepted by the filter screen. Because the filter screen is very close to the edge of the movement path of the swing hammer 102, these intercepted large particles are within the effective impact range of the swing hammer 102. As the swing hammer 102 continues to rotate and sweep at high speed, its hammering surface or edge will violently impact or squeeze the large particles intercepted on the arc-shaped filter screen 112 again, crushing them again on the surface of the screen or near its narrow gaps. This close spatial design ensures that the substandard material can be quickly fed back to the main crushing area for reprocessing, greatly reducing the coarse material residue on the screen, effectively improving the fullness of material crushing and the uniformity of output, and ensuring the quality of the final product. Finally, the finely crushed material that has passed through the arc-shaped filter screen 112 falls into the bottom structure and is fixed to the bottom of the bottom plate 118. The base 119 is designed with a sloping chute 120 with an opening on one side. The sloping chute 120 extends upward and penetrates the internal space of the base plate 118 and the base 119. Qualified fine materials can smoothly slide out of the device along this sloping chute 120, completing the entire discharge process. The output end of the drive motor 117 that provides crushing power is equipped with a drive shaft 116. The end of the drive shaft 116 is fixed with a small belt reel 115. The transmission belt 114 is wound around the small belt reel 115 and the large belt reel 113 fixed to one end of the support shaft 104. The rotational power of the motor is transmitted through the drive shaft 116, the small belt reel 115, the transmission belt 114, and the large belt reel 113, and finally drives the support shaft 104 and the multiple sets of rotating disks 101 fixed on it to rotate, so as to realize the continuous operation of the core crushing component. The drive motor 117 and the support bucket 108 that supports the crushing chamber are both bolted to the top of the bearing base plate 118, providing a stable support platform for the entire crushing action.A base 119 is mounted on the bottom of the base plate 118 via a fixed structure to form the frame foundation. To further enhance the overall rigidity and deformation resistance of the equipment under high-intensity impact, a fixed plate 121 is added to the top of the base plate 118. Several diagonal bracing plates 122 are welded to the connection points between the fixed plate 121 and the base 119 on both sides. These diagonal bracing plates 122, together with the fixed plate 121 and the base 119, form a rigid triangular support structure, effectively absorbing and dispersing the huge vibration and impact loads generated during the crushing process, ensuring... The equipment boasts long-term operational stability and structural integrity. The four corners of the fixed plate 121 have fixing holes 123, facilitating the secure bolting of the entire device to the production site foundation. The replaceable toothed block 103 design offers significant maintenance advantages: as the component directly in contact with materials and experiencing the fastest wear, the toothed block 103 is embedded in the impact surface of the swing hammer 102 via a simple bolt connection. When the toothed block 103 becomes dull or damaged due to overwork, it can be easily replaced by disassembling the bolts without replacing the entire swing hammer 102. This not only significantly reduces the cost of replacing vulnerable parts during daily maintenance, but also effectively protects the more expensive swing hammer 102 body, ensuring that its structural shape will not deform due to wear on the impact surface during long-term use, thus maintaining the high-efficiency hammering dynamics characteristics of the initial design and ensuring that the crushing efficiency remains stable at a high level for a long time. In summary, after the material enters, it is first subjected to direct violent hammering by the rotating swing hammer 102, resulting in initial crushing and material splashing. The ejected material powerfully impacts the specially set sawtooth blocks 110 in the annular cavity of the feed hopper 107 to achieve secondary crushing. The continuous rotating and impact crushing formed by multiple sets of rotating disks 101 and swing hammer 102 continuously refines the material. Subsequently, the material falls and is screened by the arc-shaped filter screen 112 installed close to the end of the hammering trajectory, and qualified fine material is discharged. Unqualified material is crushed online in real time by the continuously circulating swing hammer 102. With the unique and stable bearing support structure, efficient power transmission path and reinforced whole machine triangular support system, the device ultimately achieves efficient, stable, particle size controllable and easy-to-maintain crushing operation of raw materials for concrete pipe production.

[0027] The above-disclosed embodiments are merely one or more preferred embodiments of this application and should not be construed as limiting the scope of this application. Those skilled in the art will understand that all or part of the processes for implementing the above embodiments and equivalent variations made in accordance with the claims of this application are still within the scope of this application.

Claims

1. A raw material crushing device for concrete pipe production, comprising multiple sets of spaced rotating discs (101), characterized in that: Four swing hammers (102) are respectively installed at the edges of the rotating disk (101) by pins. The hammering surface of the swing hammer (102) is embedded with toothed blocks (103) and fixed by bolts. A support shaft (104) is fixed through the center of the rotating disk (101). The two ends of the support shaft (104) are respectively fixed through the rotating bearing (105). The rotating bearing (105) is respectively embedded between two arc-shaped rings (106). The arc-shaped rings (106) are respectively fixedly installed in the middle of the connection between the two sides of the feed hopper (107) and the support hopper (108). The feed hopper (107) is installed on the top of the support hopper (108) by bolts.

2. The raw material crushing device for concrete pipe production as described in claim 1, characterized in that: The feed hopper (107) is provided with an annular chamber (109). Several serrated blocks (110) are provided on the side wall of the annular chamber (109) opposite to the hammering direction of the swing hammer (102). The support hopper (108) is provided with a discharge chamber (111). An arc-shaped filter screen plate (112) is installed vertically below the discharge chamber (111) by bolts and is close to the edge of the moving path of the swing hammer (102).

3. The raw material crushing device for concrete pipe production as described in claim 2, characterized in that: One end of the support shaft (104) passes through the rotating bearing (105) and extends to a large belt reel (113). A transmission belt (114) is movably installed inside the large belt reel (113), and the end of the transmission belt (114) away from the large belt reel (113) is movably installed inside a small belt reel (115).

4. The raw material crushing device for concrete pipe production as described in claim 3, characterized in that: The small pulley (115) is fixedly installed at the end of the drive shaft (116). The end of the drive shaft (116) away from the small pulley (115) is located at the output end of the drive motor (117). The drive motor (117) and the support bucket (108) are respectively installed on the top of the base plate (118) by bolts.

5. The raw material crushing device for concrete pipe production as described in claim 4, characterized in that: A base (119) is fixedly installed at the bottom end of the base plate (118). A sloping chute (120) is provided on one side of the base (119). The sloping chute (120) extends into the base (119) and connects with the base plate (118), so that the base (119) forms a material discharge structure.

6. The raw material crushing device for concrete pipe production as described in claim 5, characterized in that: A fixing plate (121) is fixedly installed at the top of the base plate (118). Several diagonal bracing plates (122) are welded to the connection between the fixing plate (121) and the two sides of the base (119) to form a triangular support. Fixing holes (123) are opened at the four corners of the fixing plate (121).

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