Impact grinding type two-stage crushing sand making machine
By designing a dual-stage impact grinding crusher, combining primary impact crushing and secondary grinding crushing mechanisms, the system achieves efficient production of 20-140 mesh ultrafine sand, solving the production problems of traditional equipment, improving the yield rate and reducing powder volume.
Patent Information
- Application Number
- CN202422639120.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-31
- Publication Date
- 2025-11-07
- Estimated Expiration
- 2034-10-31
AI Technical Summary
Traditional vertical shaft impact crushers have a low yield of ultrafine sand below 20 mesh, while grinding mills produce high powder output below 140 mesh, making it difficult to meet the production needs of ultrafine sand.
The impact grinding type double-stage crushing and sand making machine is adopted, including primary impact crushing and secondary grinding crushing mechanism. Under the action of gravity, the material passes through the primary crushing chamber and the secondary crushing chamber in sequence, achieving a sand making rate of 90% in one pass.
It achieves efficient production of 20-140 mesh ultrafine sand, solving the problems of low yield and high powder content in traditional equipment for producing ultrafine sand, and avoiding material retention and excessive crushing.
Smart Images
Figure CN223517660U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to the field of mine machinery, concretely relates to a double-stage crushing sand making machine of impact grinding. BACKGROUND
[0002] Machine-made sand is widely used in various buildings, roads, bridges, ports and wharfs engineering, and different engineering requires different machine-made sand. The traditional vertical shaft impact sand making machine has too low production rate of special fine sand below 20 mesh (0.8mm), and the flour mill has too high powder volume below 140 mesh (0.1mm). Therefore, the existing equipment needs to be optimized to meet the production demand of 20-140 mesh special fine sand. SUMMARY
[0003] The utility model discloses a double-stage crushing sand making machine of impact grinding to solve the technical problem that the prior art cannot produce 20-140 mesh special fine sand.
[0004] Therefore, the double-stage crushing sand making machine of impact grinding of the utility model adopts the following technical scheme:
[0005] A double-stage crushing sand making machine of impact grinding, comprising a rack with a crushing sand making cavity, a feeding port for stone to enter the crushing sand making cavity and a discharging port for material in the crushing sand making cavity to flow out are arranged on the rack, an impact crushing mechanism and a grinding crushing mechanism are sequentially arranged in the crushing sand making cavity along the material flow direction, and the crushing sand making cavity is divided into a primary crushing cavity corresponding to the impact crushing mechanism and a secondary crushing cavity corresponding to the grinding crushing mechanism along the material flow direction; the feeding port is arranged at the upper end of the rack, the discharging port is arranged at the lower end of the rack, and the grinding crushing mechanism is located at the lower end of the impact crushing mechanism.
[0006] Further, the impact crushing mechanism comprises a primary impact impeller rotationally arranged in the primary crushing cavity and a primary impact liner plate fixed to the rack, and the primary impact liner plate is located at the periphery of the primary impact impeller.
[0007] Further, the grinding crushing mechanism comprises a secondary grinding toothed disc rotationally arranged in the secondary crushing cavity and a secondary grinding liner plate fixed to the rack, and the secondary grinding liner plate is located at the periphery of the secondary grinding toothed disc.
[0008] Further, the annular gap between the secondary grinding toothed disc and the secondary grinding liner plate is the secondary crushing cavity, and the width of the secondary crushing cavity is 18mm-20mm.
[0009] Further, the upper end of the secondary grinding toothed disc is provided with a material guiding conical surface inclined downward.
[0010] Further, the upper end outer circumferential surface of the material guiding cone surface is flush with the outer circumferential surface of the primary impact impeller dynamic trajectory line, and the lower end outer circumferential surface is flush with the tooth top circle of the secondary grinding tooth disc.
[0011] Compared with the prior art, the impact grinding type two-stage crushing sand making machine has the advantages and beneficial effects that:
[0012] After the stone enters the impact grinding type two-stage crushing sand making machine, the stone is firstly broken by impact and then broken by grinding, and the first sand making rate can reach 90%, the stone is broken in two stages by one machine, and the industry problems that the traditional vertical shaft impact type sand making machine has too low product rate of special fine sand below 20 mesh (0.8 mm) and too high powder amount below 140 mesh (0.1 mm) of a flour mill are solved.
[0013] Further, the impact crushing mechanism and the grinding crushing mechanism are arranged in the up-down direction, the material in the feeding bin firstly falls into the primary crushing cavity under the action of gravity and is crushed once, then falls into the secondary crushing cavity under the action of gravity and is crushed twice, and finally flows out under the action of gravity. The material does not need to be promoted to flow along the dynamic line by the power mechanism in the whole process, and the material does not stay in the crushing sand making machine to be repeatedly crushed to be too fine.
[0014] The additional aspects and advantages of the impact grinding type two-stage crushing sand making machine will be partially given in the following description, some will become obvious from the following description, or will be understood through the practice of the impact grinding type two-stage crushing sand making machine. BRIEF DESCRIPTION OF DRAWINGS
[0015] The above and / or additional aspects and advantages of the impact grinding type two-stage crushing sand making machine will become apparent and more readily appreciated from the following description of the embodiments, with reference to the following drawings, in which:
[0016] Figure 1 It is a sectional view of one embodiment of the impact grinding type two-stage crushing sand making machine.
[0017] Figure 2 It is a top view of the impact grinding type two-stage crushing sand making machine.
[0018] Wherein: 1, feeding bin; 2, primary impact impeller; 3, primary impact liner; 4, secondary grinding tooth disc; 5, secondary grinding liner; 6, driving motor; 7, rack; 8, discharge port; 41, material guiding cone surface. DETAILED DESCRIPTION
[0019] The embodiments of the impact grinding type two-stage crushing sand making machine are described in detail below, and examples of the embodiments are shown in the drawings, in which the same or similar reference signs represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary and are intended to explain the impact grinding type two-stage crushing sand making machine, and cannot be understood as a limitation of the impact grinding type two-stage crushing sand making machine.
[0020] In the utility model, unless another definite provision and limitation, the terms "mount", "link", "connect", "fix" and so on should be understood in broad sense, for example, can be fixed connection, also can be detachable connection, or integrally connect;Can be mechanical connection, also can be electrical connection;Can be directly connected, also can be indirectly connected through intermediate medium, can be the communication inside two elements.For the ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to specific circumstances.
[0021] The utility model discloses a two-stage crushing sand making machine of impact grinding type:
[0022] A two-stage crushing sand making machine of impact grinding type, including feed bin 1, primary impact impeller 2, primary impact lining plate 3, secondary grinding tooth disc 4, secondary grinding lining plate 5, drive motor 6, rack 7 and discharge port 8. Among them, the feed bin 1 is arranged at the top of the rack 7, and the upper end of the feed bin 1 is the feed inlet for the material to enter, and the lower end of the feed bin 1 is provided with the material inlet for the material in the feed bin 1 to enter the lower crushing sand cavity, and the discharge port 8 is located at the lower end of the rack 7. The primary impact impeller 2 and the secondary grinding tooth disc 4 are rotatably mounted in the crushing sand cavity, and the rotation power of the two is provided by the drive motor 6. Among them, the primary impact impeller 2 is arranged in the upper section of the crushing sand cavity, and the primary impact lining plate 3 is located at the outer periphery of the primary impact impeller 2. The secondary grinding tooth disc 4 is located below the primary impact impeller 2, and the secondary grinding lining plate 5 is located at the outer periphery of the secondary grinding tooth disc 4.
[0023] The crushing sand cavity is divided into two parts along the up-down direction, and the corresponding part of the impact crushing mechanism composed of the primary impact impeller 2 and the primary impact lining plate 3 is the primary crushing cavity, and the corresponding part of the grinding crushing mechanism composed of the secondary grinding tooth disc 4 and the secondary grinding lining plate 5 is the secondary crushing cavity. After the material in the feed bin 1 falls through the material inlet, it is first accelerated by the primary impact impeller 2 and then is launched at high speed by the material throwing port to impact the primary impact lining plate 3, and is crushed into a relatively coarse-grained sand mixture in the primary crushing cavity. The relatively coarse-grained sand mixture falls into the secondary crushing cavity, and the secondary grinding tooth disc 4 and the secondary grinding lining plate 5 cooperate to grind the relatively coarse-grained sand mixture in the secondary crushing cavity into special fine sand, which is then discharged through the discharge port.
[0024] It is emphasized that a part of the powder with a size less than 140 mesh is contained in the special fine sand discharged through the discharge port, and the part of the powder is removed by air selection in the subsequent process.
[0025] It needs to be emphasized that the secondary crushing cavity is an annular gap between the secondary grinding tooth disc 4 and the secondary grinding lining plate 5, and the width of the gap is 20 mm, so only the sand mixture with small size can fall into the secondary crushing cavity for secondary crushing. At the same time, the width of the secondary crushing cavity in the embodiment is 20 mm, so most of the sand mixture is ground into superfine sand with a size of 0.1-0.8 mm in the secondary crushing cavity. The sand mixture is further crushed in the secondary crushing cavity, and after a short crushing time, the material in the secondary crushing cavity will be discharged under the extrusion action of the material feeding on the upper end and the self-weight action, greatly reducing over-crushing, so as to achieve the condition that the content of superfine sand with a size of 0.1-0.8 mm is relatively high.
[0026] In other embodiments, the width of the secondary crushing cavity can also be between 18 mm and 20 mm.
[0027] In the embodiment, the upper end of the secondary grinding tooth disc 4 is provided with a material guiding conical surface 41, and the outer end of the material guiding conical surface 41 is inclined downward. Specifically, the upper end outer circumferential surface of the material guiding conical surface 41 is flush with the outer circumferential surface of the primary impact impeller 2 dynamic trajectory line, and the lower end outer circumferential surface is flush with the tooth tip circle of the secondary grinding tooth disc 4, so that the material in the primary crushing cavity can smoothly fall into the secondary crushing cavity and will not be stuck in the primary crushing cavity.
[0028] In the embodiment, the impact crushing mechanism and the grinding crushing mechanism are arranged above and below, and the material in the feeding bin 1 falls into the primary crushing cavity under the action of gravity and is crushed once, and then falls into the secondary crushing cavity under the action of gravity and is crushed twice, and finally flows out under the action of gravity. The whole process does not need a power mechanism to promote the material to flow along the dynamic line, and there is no situation that the material is retained in the crushing sand making machine and repeatedly crushed to be too small in size.
Claims
1. A sand making machine of impact grinding type two-stage crushing, characterized by: The machine frame with a broken sand making chamber, the machine frame is provided with a feeding port for feeding stone into the broken sand making chamber and a discharging port for discharging materials from the broken sand making chamber, the broken sand making chamber is provided with an impact crushing mechanism and a grinding crushing mechanism in sequence along the material flow direction, the broken sand making chamber is divided into a primary crushing chamber corresponding to the impact crushing mechanism and a secondary crushing chamber corresponding to the grinding crushing mechanism along the material flow direction; the feeding port is arranged at the upper end of the machine frame, the discharging port is arranged at the lower end of the machine frame, and the grinding crushing mechanism is located at the lower end of the impact crushing mechanism.
2. The impact grinding type two-stage crushing sand making machine according to claim 1, characterized in that: The impact crushing mechanism comprises a primary impact impeller rotatingly arranged in the primary crushing chamber and a primary impact lining plate fixed to the machine frame, and the primary impact lining plate is located at the periphery of the primary impact impeller.
3. The impact grinding type two-stage crushing sand making machine according to claim 2, characterized in that: The grinding crushing mechanism comprises a secondary grinding toothed disc rotatingly arranged in the secondary crushing chamber and a secondary grinding lining plate fixed to the machine frame, and the secondary grinding lining plate is located at the periphery of the secondary grinding toothed disc.
4. The impact grinding type two-stage crushing sand making machine according to claim 3, characterized in that: The annular gap between the secondary grinding toothed disc and the secondary grinding lining plate is the secondary crushing chamber, and the width of the secondary crushing chamber is 18-20 mm.
5. The impact grinding type two-stage crushing sand making machine according to claim 3, characterized in that: The upper end of the secondary grinding toothed disc is provided with a material guiding conical surface inclined downward.
6. The impact grinding type two-stage crushing sand making machine according to claim 5, characterized in that: The upper end outer peripheral surface of the material guiding conical surface is flush with the outer peripheral surface of the primary impact impeller trajectory line, and the lower end outer peripheral surface is flush with the tooth top circle of the secondary grinding toothed disc.