Quick-change self-cleaning type pulverizer screening device

Abstract

The utility model relates to a quick-change self-cleaning type grinder screening device, the device includes support frame, collection material protective cover, screen ring, sieve drum, clear screen ware and quick -open type maintenance door, screen ring detachably installs in collection material protective cover, sieve drum can selectively be fixed in screen ring, including small round hole sieve drum and vertical strip clearance sieve drum, the inner wall of vertical strip clearance sieve drum is equipped with axial guide strip, promotes the crushing efficiency, and the clear screen ware is rotary steel brush, and the outer wall of sieve drum is cleaned continuously, prevents the blockage, and quick -open type maintenance door is connected through the hinge or slide rail, and after opening, the screen ring and sieve drum can be integrally taken out to carry out the quick replacement, the utility model solves the problem that the traditional screen cloth replacement is complicated, is easy to block and is inconvenient to maintain, realizes quick screen, self -cleaning and convenient maintenance, significantly improves production efficiency, reduces energy consumption and safety risk.

Description

Technical Field

[0001] This utility model relates to the technical field of material crushing and sorting equipment, and in particular to a sieve for a crusher, specifically a quick-change self-cleaning crusher sieve device. Background Technology

[0002] The screen of a crusher is a core component in crushing equipment that enables particle size control and sorting. Its performance directly determines the final effect of the crushing operation. During the crushing process, the screen allows fine particles that have reached the target particle size to pass through through its evenly distributed mesh or gaps, while intercepting coarse particles that do not meet the standard in the crushing chamber for further crushing. This process not only ensures the uniformity and consistency of the final product particle size, meeting the strict standards of downstream processes or specific industries, but also directly affects the crushing efficiency and energy consumption level of the entire production line. Therefore, the advancement of screen technology is a key indicator for measuring the comprehensive performance of a crusher.

[0003] Although the screen is crucial, traditional crusher screens and their supporting systems have revealed many shortcomings that urgently need to be addressed during long-term use, mainly in the following three aspects:

[0004] Firstly, in the existing technology, the screen is usually fixed in the crushing chamber by multiple bolts. When changing screens of different aperture or type, the operator must perform a series of complex steps such as disassembling the bolts, taking out the old screen, installing the new screen, and retightening the bolts. This process not only consumes a lot of manpower and time, resulting in a reduction in the effective operating rate of the equipment, but also causes significant economic losses due to production interruptions when handling high-value or continuous production tasks.

[0005] Secondly, screen clogging is a common problem that has long plagued various industries, especially when processing high-moisture, high-fiber, or high-oil, high-viscosity materials. The materials are very easy to adhere to the screen surface or clog the screen holes. Once clogging occurs, qualified materials cannot pass through the screen in time, resulting in a sharp drop in crushing efficiency, an abnormal increase in energy consumption, and may also cause over-crushing of materials, affecting product quality. Although the industry has tried solutions such as screen vibration and increasing vibration intensity, the anti-clogging effect is still not ideal for high-viscosity or fibrous materials. Frequent cleaning and shutdowns severely restrict production efficiency.

[0006] Thirdly, to clean clogged screens or perform routine maintenance, operators often need to frequently open or even partially disassemble the equipment. This not only increases labor intensity and maintenance costs, but also poses a risk of dust explosion due to residual dust during the cleaning process. High-speed rotating parts also pose a mechanical injury hazard. In addition, the built-in screen cleaning device itself has problems such as easy wear, incomplete cleaning, or difficulty in maintaining the optimal gap with the screen, resulting in the cleaning effect decaying over time and failing to achieve a stable and reliable self-cleaning function.

[0007] In summary, the existing pulverizer screening technology mainly has the following specific problems:

[0008] (1) The screen replacement has a low degree of mechanization and automation, relies heavily on manual operation, and the replacement process is time-consuming and labor-intensive, which cannot meet the production needs of modern industrial production for equipment flexibility and rapid adjustment.

[0009] (2) Due to the poor adaptability to special materials such as high moisture and high fiber, the screen anti-clogging design has limited effect, and clogging occurs frequently, which has become the main bottleneck to improve the production efficiency of related industries.

[0010] (3) The lack of an integrated and efficient self-cleaning system or its insufficient reliability results in short equipment maintenance cycles and high frequency, which not only increases the workload and safety risks of operators, but also affects the ability of the equipment to operate continuously and stably. Utility Model Content

[0011] To address the three core challenges mentioned in the background art—cumbersome and time-consuming screen replacement, easy screen clogging affecting efficiency, and inconvenient cleaning and maintenance posing safety hazards—this utility model proposes an integrated solution. This solution aims to achieve rapid screen replacement, efficient self-cleaning, and safe and convenient maintenance of the screening device. The core of this solution lies in designing the screening device as a modular, independent assembly integrating protection and material collection, with built-in cleaning functions. Based on this, we propose a quick-change self-cleaning crusher screening device.

[0012] The objective of this utility model is achieved through the following technical solution:

[0013] A quick-change self-cleaning crusher screening device includes a support frame, a material collection protective cover, a screen cleaner, a screen ring, a screen barrel, and a quick-opening maintenance door.

[0014] Furthermore, the support frame provides a stable installation foundation for the entire device. The material collection protective cover is fixed on the support frame, and the cavity formed inside it has two major functions: first, it serves as a working chamber to accommodate the core screening components; second, it serves as a temporary storage space to collect and guide qualified powder passing through the sieve barrel, effectively preventing dust from escaping.

[0015] Furthermore, the screen ring is detachably installed in the cavity of the material collection cover by simple buckles or bolts, forming the core carrier for realizing the quick-change function. The replaceable screen barrel specifically includes a small round hole screen barrel suitable for granular materials and a vertically spaced screen barrel suitable for flaky and fibrous materials. It can be flexibly selected and fixed in the screen ring according to production needs. This design fundamentally solves the pain points of the traditional screen replacement process being complicated and time-consuming.

[0016] Furthermore, to address the issues of easy entanglement and low efficiency when crushing fibrous materials, multiple axially extending guide strips are evenly arranged on the inner wall of the vertical gap screen barrel. These guide strips can effectively disrupt the circulation formed by the material, increase the probability of collision and shearing action between the material and the hammer blades, and guide the axial movement of the material, thereby improving the crushing efficiency and assisting the screening process.

[0017] Furthermore, the screen cleaner is located inside the cavity of the material collection protective cover and surrounds the outer periphery of the screen ring. Its working end, driven by the drive mechanism, continuously maintains contact with the outer wall of the screen barrel and makes relative movements. This design can actively and online clean the material blocked in the screen holes or gaps during the crushing operation, ensuring that the screening efficiency remains stable and effectively avoiding the decrease in production capacity and increase in energy consumption caused by blockage.

[0018] Furthermore, the quick-opening maintenance door is movably connected to the side of the material collection cover via hinges or slide rails, and is equipped with a handle and locking mechanism. When it is necessary to replace the screen barrel or perform internal maintenance, simply unlock and open this door to remove or push in the entire screen ring along with the screen barrel inside from the side. This design greatly simplifies the operation process, making screen replacement as easy as replacing a printer toner cartridge, while providing operators with a safe maintenance passage and avoiding the risks of disassembling the entire equipment.

[0019] Beneficial effects:

[0020] In summary, this utility model incorporates multiple innovations, bringing significant progress and economic benefits to existing technologies:

[0021] (1) Through the coordinated design of quick-opening maintenance door and modular screen ring, the screen replacement time is shortened from hours in the traditional way to minutes, which greatly reduces equipment downtime and improves the flexibility and overall utilization of the production line.

[0022] (2) The integrated screen cleaner achieves continuous online self-cleaning, which can effectively deal with various materials that are prone to clogging, ensuring the stability of screening efficiency and the consistency of product particle size, thereby improving production capacity and reducing unit product energy consumption.

[0023] (3) The design of the maintenance door ensures that all maintenance operations are carried out within a specified and controllable range, reducing safety risks. At the same time, the integrated design of the aggregate protection cover eliminates dust leakage points and improves the working environment. The entire device has a compact structure and clear logic, which greatly reduces the difficulty and cost of daily maintenance and troubleshooting. Attached Figure Description

[0024] Figure 1This is a schematic diagram of the appearance of a quick-change self-cleaning crusher screening device, showing the support frame, material collection protective cover, screen cleaner and small round hole screen barrel;

[0025] Figure 2 This is a schematic diagram of the appearance of a vertically spaced screen barrel of a quick-change self-cleaning crusher screening device;

[0026] Figure 3 This is a top view of a vertically spaced screen barrel of a quick-change self-cleaning crusher screening device, showing the guide bars inside the vertically spaced screen barrel;

[0027] Figure 4 This is an isometric side view of a quick-change self-cleaning crusher screening device, showing the side quick-opening maintenance door of the aggregate protection cover;

[0028] In the diagram, 1. support frame; 2. material collection protective cover; 3. screen cleaner; 4. small round hole screen barrel; 5. vertical bar gap screen barrel; 501. guide bar; 6. quick-opening maintenance door. Detailed Implementation

[0029] To enhance understanding of this utility model, the present utility model will be further described in detail below with reference to the embodiments and accompanying drawings. These embodiments are only used to explain the present utility model and do not constitute a limitation on the scope of protection of the present utility model.

[0030] 1. Support frame; 2. Material collection protective cover; 3. Screen cleaner; 4. Small round hole screen barrel; 5. Vertical bar gap screen barrel; 501. Guide bar; 6. Quick-opening maintenance door.

[0031] Example 1:

[0032] like Figure 1 , 2 As shown in Figure 4, this embodiment provides a quick-change self-cleaning crusher screening device. This device, as an independent module, can be fixedly installed on the main housing of the crusher through the mounting holes or connecting parts on the support frame 1, and works in conjunction with the internal crushing components such as rotors and hammers.

[0033] The support frame 1 is formed by welding or casting of steel profiles. Its function is to serve as the basic skeleton of the entire screening device, provide stable and reliable support for core components such as the material collection protective cover 1, and ensure the accuracy of its connection with the main unit.

[0034] The material collection protective cover 2 is fixed to the support frame 1 by bolts. It is usually made of steel plate rolled and welded, and its interior forms a sealed cavity. This cavity is not only the working chamber for screening operations, but also a material collection space for temporary storage and guidance of materials, effectively preventing dust from escaping to the external environment.

[0035] like Figure 1As shown, the screen cleaner 3 is installed inside the cavity of the material collection protective cover 2. In this embodiment, the screen cleaner 3 is preferably a rotating steel brush with a drive motor. The axis of the steel brush is installed parallel to the axis of the screen barrel and is fixed to the inner wall of the material collection protective cover 2 through a bearing seat. After the drive motor is started, it drives the steel brush to rotate at high speed. The bristles on it are continuously pressed against the outer wall surface of the screen barrel under the action of spring or its own weight.

[0036] The screen ring is detachably installed at the center of the cavity of the material collection cover 2 via a quick-locking mechanism. The small round-hole screen barrel is fixed inside the screen ring by a few bolts through the flanges at both ends, thus forming a complete, detachable screening module. This small round-hole screen barrel is installed when granular materials need to be processed.

[0037] The working process of this utility model is as follows:

[0038] After the material is crushed in the main crusher, it is thrown to the inner wall of the small round hole screen barrel under the action of centrifugal force and airflow. The qualified powder passes through the screen holes and enters the collection space of the collection protective cover 2, and is finally discharged from the discharge port. At the same time, the rotating steel brush of the screen cleaner 3 continues to work to brush away the material that may block the screen holes and keep the screen holes open. Large particles that have not been crushed to the standard continue to remain inside the screen barrel to be repeatedly ground.

[0039] Example 2:

[0040] The main difference between this embodiment and Embodiment 1 lies in the type of sieve bucket used and its special structure.

[0041] like Figure 2 , 3 As shown in Figure 4, when it is necessary to process fibrous or flaky materials, the small round hole screen barrel 4 module in Example 1 can be taken out as a whole and replaced with a module with a built-in vertical bar gap screen barrel 5.

[0042] The vertically spaced screen barrel 5 is also fixed inside the screen ring. Its unique feature is that several axially extending guide strips 501 are evenly distributed on its inner wall. These guide strips can be protruding ribs integrally stamped with the screen barrel or steel bars welded later. They protrude inward and can effectively break the material ring formed by the material under the action of centrifugal force, increase the collision and shearing opportunities between the material and the hammer blades, and guide the material to move axially, avoiding the accumulation of material at the end of the screen, thereby significantly improving the crushing and screening efficiency for fibrous materials.

[0043] Example 3:

[0044] This embodiment focuses on illustrating the rapid maintenance function of this utility model.

[0045] like Figure 4As shown, the side of the material collection protective cover 2 is provided with a large maintenance opening, which is closed by a quick-opening maintenance door 6. In this embodiment, the maintenance door is connected to the material collection protective cover 2 by a heavy-duty hinge, and a sturdy handle is welded to the maintenance door, and a rotary pressing locking mechanism is installed.

[0046] When it is necessary to replace the screen barrel or clean the inside, the operating procedure is as follows:

[0047] Loosen and open the locking mechanism on the quick-opening maintenance door 6;

[0048] Open the door around the hinge using the handle;

[0049] Loosen the quick-locking mechanism on the screen ring to pull the entire screen ring, along with its internal screen barrel, out of the maintenance port.

[0050] After replacing or cleaning the screen barrel externally, push the new screening module into the aggregate protection cover 2, lock the screen ring, and finally close and lock the quick-opening maintenance door 6.

[0051] This design transforms complex internal maintenance into simple opening, disassembly, installation, and closing operations. No large components need to be disassembled, and no special tools are required. A single person can complete the task in a very short time, greatly improving the usability and ease of maintenance of the equipment.

[0052] Implementation Example

[0053] The following example illustrates how this product is used:

[0054] A feed manufacturer needs to produce feed ingredients of different particle sizes for different animal breeds. Its existing production line uses a traditional grinder, and switching from producing coarse pelleted feed for broilers to fine powdered feed for laying hens requires changing the screen every time, taking approximately 45 minutes. This severely impacts production efficiency and timely order delivery. The manufacturer has introduced this new quick-change self-cleaning grinder screening device.

[0055] Prepare two pre-assembled screening modules in advance:

[0056] Module A: A screen barrel 5 with a 1.5mm vertical gap is fixed inside the screen ring, used for producing coarse particles.

[0057] Module B: A sieve barrel 4 with a 1.0mm small round hole is fixed inside the sieve ring for producing fine powder.

[0058] Step 1: After the current batch of broiler feed is produced, the operator presses the stop button on the grinder. After the equipment stops completely, the operator cleans up the site and prepares the tools.

[0059] Step 2: The operator rotates the butterfly bolt locking mechanism on the quick-opening maintenance door 6 to loosen it. Then, holding the handle on the door, the operator uses the hinge to easily pull the maintenance door outward, fully exposing the entire screening chamber of the crusher to the operator.

[0060] Step 3: The operator can see the module A currently in use. Loosen the two quick-release levers on the screen ring by hand, and then directly grasp the handle on the screen ring to smoothly pull the entire module A out of the aggregate protection cover 2.

[0061] Step 4: The operator removes module B, which has been pre-installed with the small round hole screen 4, from the trolley, pushes it into the correct position inside the aggregate protection cover 2 along the guide rail, and then pulls the quick release lever to firmly lock module B in place.

[0062] Step 5: The operator closes the quick-opening maintenance door 6 and tightens the wing bolts to seal it. The entire process does not require cleaning the screen, as the built-in screen cleaner 3 will work automatically on the next startup to prevent new material from clogging the screen.

[0063] Step Six: Start the grinder and begin processing the raw materials for laying hen feed. During the grinding process, the small round hole sieve 4 ensures that only fine powder smaller than 1.0mm can pass through, thus guaranteeing the product particle size.

[0064] The rotating steel brush of the screen cleaner 3 continuously cleans the outer wall of the screen barrel, effectively preventing clogging caused by humidity or static electricity, and maintaining a stable discharge efficiency.

[0065] The crushed fine powder falls into the temporary storage space of the aggregate protective cover 2 and is successfully guided out.

[0066] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A quick-change self-cleaning pulverizer screening device, characterized in that, include: Support frame, material collection protective cover, screen ring, screen barrel, screen cleaner and quick-opening maintenance door; The support frame supports the entire screening device; The material collection protective cover is fixedly installed on the support frame, and its interior forms a cavity for accommodating and guiding materials; The screen ring is detachably installed inside the cavity of the material collection protective cover; The screen barrel contains at least two types, and the screen barrel can be selectively fixed inside the screen ring to form a screening working surface; the at least two types of screen barrels include small round hole screen barrels and vertical bar gap screen barrels. The screen cleaner is installed inside the cavity of the material collection cover and is located on the outer periphery of the screen ring, with its working end in contact with the outer wall of the screen barrel. The quick-opening maintenance door of the screen barrel is movably connected to the side of the aggregate protection cover. When the quick-opening maintenance door is opened, the screen ring and the selected screen barrel can be removed from the aggregate protection cover for replacement.

2. The quick-change self-cleaning pulverizer screening device according to claim 1, characterized in that, The inner wall of the vertical gap screen barrel is provided with several guide bars extending along its axial direction, and the guide bars protrude from the inner wall toward the axis.

3. The quick-change self-cleaning pulverizer screening device according to claim 2, characterized in that, The guide strips are evenly distributed circumferentially on the inner wall of the vertical gap screen barrel.

4. The quick-change self-cleaning pulverizer screening device according to claim 1, characterized in that, The cleaning device is a rotating steel brush with a drive mechanism. The axis of the rotating steel brush is parallel to the axis of the screen barrel, and its bristles are continuously pressed against the outer wall of the screen barrel.

5. A quick-change self-cleaning pulverizer screening device according to claim 4, characterized in that, The drive mechanism of the screen cleaner is a motor or a transmission mechanism that is linked to the main shaft of the crusher.

6. A quick-change self-cleaning pulverizer screening device according to claim 1, characterized in that, The quick-opening maintenance door is connected to the material collection protective cover via a hinge or sliding rail structure.

7. A quick-change self-cleaning pulverizer screening device according to claim 6, characterized in that, The quick-opening maintenance door is equipped with a handle, which locks onto the locking mechanism on the aggregate protective cover when closed.

8. A quick-change self-cleaning pulverizer screening device according to claim 1, characterized in that, The screen ring is equipped with a handle or buckle structure for easy gripping and operation.

9. A quick-change self-cleaning pulverizer screening device according to claim 1, characterized in that, The small round hole screen barrel and the vertical bar gap screen barrel are fixed to the screen ring by snap-fit ​​connection, bolt fastening or flange connection.

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