Sand powder content self-adaptive adjusting device of mechanism sand production line

Abstract

This invention relates to the field of building materials technology and discloses an adaptive adjustment device for sand powder content in a manufactured sand production line. The device includes a limiting lubrication assembly for releasably locking the control gate and establishing a lubrication channel, a recording assembly for recording stroke information in response to the opening movement of the control gate, and a lubricating oil delivery mechanism for delivering lubricating oil based on the recorded stroke information. The technical solution of this invention uses an electromagnetic drive assembly as a unified control hub, combining multiple functions such as unlocking / locking, transmission engagement, stroke accumulation, and lubrication triggering. When the electromagnetic block is energized, it synchronously drives the limiting lubrication assembly to unlock and the recording assembly to engage. The opening movement of the control gate is accumulated by the recording assembly and converted into the rotation of the cam and the energy stored in the plunger pump. When the accumulated stroke reaches the target, the stored mechanical energy is released, driving the lubricating oil delivery mechanism to directly pump the lubricant to the friction pair through the channel built into the limiting lubrication assembly.

Description

Technical Field

[0001] This invention relates to the field of building materials technology, and more specifically to an adaptive adjustment device for sand powder content in a manufactured sand production line. Background Technology

[0002] In manufactured sand production lines, air classification is a crucial process for controlling the powder content of the finished sand, and its accuracy directly depends on the stability of the damper opening in the air inlet duct. Currently, the commonly used electric or pneumatic dampers face the following technical challenges in long-term stable operation: First, there's the issue of maintaining the opening angle. After the damper actuator is adjusted to the correct position, it typically relies on motor self-locking or simple mechanical friction to maintain its position. However, the airflow pressure in the intake duct is not constant. Disturbances from upstream equipment starting and stopping or load changes cause frequent fluctuations in air pressure. These fluctuations exert continuous, alternating forces on the damper plate, making traditional locking methods prone to creep or drift. Even minute angular changes, amplified by the long air duct, can lead to significant deviations in the airflow reaching the powder selection zone, resulting in uncontrolled sand and powder content and unstable product gradation.

[0003] Secondly, there is the issue of lubrication and maintenance of moving parts. The core moving parts of the damper, such as the door panel guide rails, shaft bearings, and the sliding mechanism that converts rotary motion into linear motion, need to operate in dusty environments for extended periods. Existing solutions mostly rely on periodic manual grease application or simple timed oil supply from a central lubrication station. This approach has significant drawbacks: Firstly, the lubrication cycle is decoupled from the actual frequency and amplitude of the damper's operation. During periods of frequent adjustment, there may be insufficient lubrication, while during periods of long-term maintenance, there may be excessive lubrication, resulting in waste and oil buildup.

[0004] Secondly, the grease filling point is often far from the actual friction contact surface. Relying on the slow penetration and diffusion of grease, it is difficult to ensure that the lubricant reaches the sealed gaps that need lubrication in a timely and sufficient manner, such as the contact surface between the sliding block and the guide rail, and the interface between the rotating shaft and the bushing. This results in the friction pair often being in a state of boundary lubrication or even dry friction, which not only increases the running resistance and slows down the adjustment action, but also causes abnormal wear, forming a vicious cycle, and eventually causing the mechanism to jam, threatening the continuous operation reliability of the entire adaptive adjustment system.

[0005] Therefore, there is an urgent need for a damper technology that can proactively adapt to working conditions, maintain a stable opening, and precisely and on-demand deliver lubricant to key friction points. Summary of the Invention

[0006] In view of the above-mentioned shortcomings of the prior art, the present invention provides an adaptive adjustment device for sand powder content in a manufactured sand production line, which can effectively solve the problems existing in the prior art.

[0007] To achieve the above objectives, the present invention provides the following technical solution: This invention provides an adaptive adjustment device for sand powder content in a manufactured sand production line, comprising an air duct, a damper assembly for controlling the air intake at one end of the air duct, a fixed plate at one end of the air duct, a control gate for adjusting the opening degree on the fixed plate, a limiting lubrication assembly for releasably locking the control gate and establishing a lubrication channel below the control gate, a recording assembly for recording stroke information in response to the opening movement of the control gate below the limiting lubrication assembly, and a lubricating oil conveying mechanism for conveying lubricating oil according to the recorded stroke information on one side of the recording assembly, the lubricating oil conveying mechanism being fluidly connected to the limiting lubrication assembly, and when the cumulative stroke of the opening movement of the control gate reaches a set threshold, the lubricating oil conveying mechanism is triggered and conveys the lubricating oil to the sliding engagement part of the control gate via the limiting lubrication assembly.

[0008] Furthermore, the control gate includes two symmetrically arranged sliding doors. A guide rail is provided on the fixed plate to guide the sliding doors to move linearly. A rotating ring is rotatably provided on the fixed plate. A rotating plate for driving the sliding doors is provided in the rotating ring. An adjusting protrusion is provided on the sliding door. An arc-shaped groove is provided on the rotating plate to slide with the adjusting protrusion. A toothed block is provided on the inner wall of the rotating ring. A drive motor is provided on the fixed plate. A rotating gear that meshes with the toothed block is provided at the output end of the drive motor.

[0009] Furthermore, the limiting lubrication assembly includes fixed blocks symmetrically arranged at the bottom of the guide rail, with vertical rods that can slide vertically in the fixed blocks, and an elastic element that provides a restoring spring force between the fixed blocks and the vertical rods. A limiting block is provided at the top of the vertical rods, and a lubrication gap is formed between the limiting block and the top of the vertical rods. The bottoms of the two vertical rods are connected by a horizontal plate, and an electromagnetic drive assembly for driving the horizontal plate to move vertically is provided on the horizontal plate.

[0010] Furthermore, a conveying cavity is provided inside the vertical rod. The conveying cavity is used to convey lubricating oil to the lubrication gap. The lubrication gap is located at the top of the conveying cavity. The conveying cavity is connected to the lubricating oil conveying mechanism through pipelines.

[0011] Furthermore, the electromagnetic drive assembly includes a magnetic block 1 disposed at the center of the horizontal plate, a connecting plate disposed on the fixed plate, and an electromagnetic block fixedly disposed on the connecting plate. The electromagnetic block is located below the magnetic block 1, and when the electromagnetic block is energized, it generates an attraction force on the magnetic block 1.

[0012] Furthermore, the electromagnetic block is connected in parallel with the drive motor circuit. Before the drive motor starts, the electromagnetic block is energized, and after the drive motor stops, the electromagnetic block is de-energized.

[0013] Furthermore, the lubricating oil delivery mechanism includes a sliding plate mounted on a connecting plate and capable of sliding along a direction perpendicular to the vertical rod. An elastic element providing a restoring force is provided between the sliding plate and the connecting plate. A fixed pipe is mounted on the sliding plate. The fixed pipe is connected to the oil storage tank and the delivery cavity respectively through pipelines. A one-way valve is installed in each pipeline. An axially movable piston rod is installed inside the fixed pipe. An elastic element providing a restoring force is provided between the piston rod and the fixed pipe.

[0014] Furthermore, the recording component includes a rotating rod disposed at the bottom of the sliding plate and capable of moving synchronously. One end of the rotating rod is provided with a driven gear, and the inner wall of the rotating ring is provided with a second toothed block that cooperates with the driven gear. A second magnetic block is disposed on the rotating rod, which is located below the electromagnetic block and is positioned opposite to it in polarity. The end of the rotating rod away from the driven gear is connected to an adjusting rod through a ratchet mechanism. One end of the adjusting rod is provided with a cam, which abuts against the end of the piston rod.

[0015] Furthermore, when the electromagnetic block is energized, it generates a repulsive force on the second magnetic block, causing the sliding plate and rotating rod to move axially, so that the driven gear meshes with the second gear, and the rotating rod rotates synchronously with the rotating ring under the action of the driven gear and the second gear.

[0016] Furthermore, when the rotating rod rotates with the rotating ring in the opening direction, the ratchet mechanism drives the adjusting rod and cam to rotate. The cam pushes the piston rod to draw the lubricating oil in the oil reservoir into the fixed pipe. When the rotating rod rotates with the rotating ring in the closing direction, the ratchet mechanism slips, and the adjusting rod and cam remain stationary. When the adjusting rod rotates to the point where the cam passes the highest point of the profile, the piston rod returns to its original position under the action of the reset force, and the lubricating oil accumulated in the fixed pipe is pressed into the delivery chamber through the pipeline.

[0017] The technical solution provided by this invention has the following advantages compared with the prior art: 1. This invention, by setting a limit lubrication component controlled by an electromagnetic drive assembly for lifting and lowering, enables the limit block to firmly abut against the control door under the action of the elastic element after the damper is adjusted to the correct position, providing a reliable mechanical locking force. This purely mechanical locking method effectively resists the force that causes the damper position to drift due to wind pressure fluctuations, thereby ensuring the long-term stability of the damper opening and avoiding the problem of inaccurate control of sand and powder content caused by slight changes in opening, significantly improving the stability of the production process and the consistency of the product.

[0018] 2. This invention creatively achieves adaptive and precise lubrication based on the actual working wear of the damper, i.e., the cumulative opening stroke, by setting up a recording component and a lubricating oil delivery mechanism. The ratchet mechanism in the recording component ensures that only the damper opening stroke is accumulated, and drives the adjusting rod and cam to rotate. When the accumulated stroke reaches a preset threshold, the cam releases the piston rod, triggering the lubricating oil delivery mechanism to press out a fixed amount of lubricating grease. This achieves automatic matching of lubrication frequency and dosage with the actual working load, overcoming the drawbacks of insufficient or excessive lubrication in the timed lubrication mode.

[0019] 3. This invention designs the vertical rod in the limiting lubrication assembly as a conveying cavity, and combines its top end with the limiting block to form a lubrication gap. At the same time, the conveying cavity is directly connected to the output end of the lubricating oil conveying mechanism, thus constructing a direct lubrication channel from the oil storage point to the surface of the key friction pair. When lubrication is triggered, the lubricating oil can directly and quickly reach the contact interface of the sliding mating parts such as the control gate and the guide rail under pressure, achieving efficient and precise lubrication of the sealed friction pair. This fundamentally solves the problems of slow penetration and difficulty in reaching the target area in traditional lubrication methods, significantly reduces motion resistance and wear risk, and ensures the flexibility and reliability of the mechanism in long-term operation. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are merely some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without any creative effort.

[0021] Figure 1 This is a schematic diagram of the structure of an embodiment of the present invention; Figure 2 This is a schematic diagram of the damper assembly in an embodiment of the present invention; Figure 3 This is a schematic diagram of the rotating ring in an embodiment of the present invention; Figure 4 This is a schematic diagram of the control gate in an embodiment of the present invention; Figure 5 This is a schematic diagram of the structure of the limiting lubrication assembly in an embodiment of the present invention; Figure 6 This is a cross-sectional view of the fixing block in an embodiment of the present invention; Figure 7 This is a schematic diagram of the structure of the fixing plate in an embodiment of the present invention; Figure 8 for Figure 7 Enlarged view of section A; Figure 9This is a schematic diagram of the structure of the lubricating oil delivery mechanism in an embodiment of the present invention; Figure 10 This is a schematic diagram of the internal structure of the fixed tube in an embodiment of the present invention.

[0022] Explanation of icon numbers: 1. Air ducts; 2. Damper assembly; 21. Fixing plate; 22. Guide rail; 23. Rotating ring; 231. Gear block one; 232. Gear block two; 24. Rotating plate; 241. Arc groove; 25. Drive motor; 251. Rotating gear; 3. Control door; 31. Sliding door; 311. Adjusting lug; 4. Limiting and lubricating assembly; 41. Fixing block; 42. Vertical rod; 421. Conveying cavity; 43. Limiting block; 44. Horizontal plate; 45. Connecting plate; 5. Recording component; 51. Rotating rod; 52. Driven gear; 53. Adjusting rod; 54. Cam; 6. Lubricating oil delivery mechanism; 61. Sliding plate; 63. Fixed pipe; 64. Pipeline; 65. Piston rod; 7. Electromagnetic drive assembly; 71. Magnetic block one; 72. Electromagnetic block; 73. Magnetic block two. Detailed Implementation

[0023] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0024] The present invention will be further described below with reference to embodiments.

[0025] Example 1 Reference Figures 1 to 6This invention provides an adaptive adjustment device for sand powder content in a manufactured sand production line, comprising an air duct 1, with a damper assembly 2 at one end for controlling the air intake. The damper assembly 2 includes a fixed plate 21 at one end of the air duct 1, and a regulating gate 3 for adjusting the opening degree on the fixed plate 21. The regulating gate 3 includes two symmetrically arranged movable gates 31. A guide rail 22 is provided on the fixed plate 21 to guide the movable gates 31 to move linearly. A rotating ring 23 is rotatably mounted on the fixed plate 21 via bearings. A rotating plate 24 for driving the movable gates 31 is fixedly mounted in the rotating ring 23. An adjusting protrusion 311 is provided on the movable gate 31. The rotating plate 24 has an arcuate groove 241 that slides with the adjusting protrusion 311. A toothed block 231 is provided on the inner wall of the rotating ring 23. A drive motor 25 is mounted on the fixed plate 21, and a rotating gear 251 meshing with the toothed block 231 is provided at the output end of the drive motor 25.

[0026] Specifically, when the drive motor 25 starts, the rotating gear 251 on its output shaft meshes with the tooth block 231 on the inner wall of the rotating ring 23, driving the rotating ring 23 to rotate. The rotating plate 24 fixed inside the rotating ring 23 rotates synchronously. The arc groove 241 on the rotating plate 24 and the adjusting protrusion 311 installed on the sliding door 31 form a sliding pair. The special contour design of the arc groove 241 makes the rotational motion of the rotating plate 24 converted into the linear motion of the two adjusting protrusions 311 along the guide rail 22 in opposite directions or in opposite directions, thereby driving the two sliding doors 31 to open or close the air inlet. The guide rail 22 ensures the accuracy and stability of the movement trajectory of the sliding door 31.

[0027] Below the control gate 3, a limiting lubrication assembly 4 is provided for releasably locking it and establishing a lubrication channel. The limiting lubrication assembly 4 includes a fixing block 41 symmetrically arranged at the bottom of the guide rail 22. A vertical rod 42 capable of vertical sliding is provided in the fixing block 41. An elastic element providing a reset spring force is provided between the fixing block 41 and the vertical rod 42. A limiting block 43 is provided at the top of the vertical rod 42. A lubrication gap is formed between the limiting block 43 and the top of the vertical rod 42. The bottoms of the two vertical rods 42 are connected by a horizontal plate 44. An electromagnetic drive assembly 7 for driving the horizontal plate 44 to move vertically is provided on the horizontal plate 44.

[0028] The vertical rod 42 is provided with a conveying cavity 421, which is used to convey lubricating oil to the lubrication gap. The lubrication gap is located at the top of the conveying cavity 421. The conveying cavity 421 is connected to the lubricating oil conveying mechanism 6 through the pipeline 64.

[0029] Specifically, the electromagnetic drive assembly 7 is the power source for unlocking and locking. The electromagnetic drive assembly 7 includes a magnetic block 71 located at the center of the horizontal plate 44, a connecting plate 45 on the fixed plate 21, and an electromagnetic block 72 fixedly mounted on the connecting plate 45. The electromagnetic block 72 is located below the magnetic block 71. When the electromagnetic block 72 is energized, it generates a vertically downward attraction force on the magnetic block 71.

[0030] The electromagnetic block 72 is connected in parallel with the drive motor 25 circuit. Its control timing is set so that the electromagnetic block 72 is energized before the drive motor 25 starts and de-energized after the drive motor 25 stops.

[0031] When the damper needs to be adjusted, the control system first supplies power to the electromagnetic block 72. The strong magnetic field generated by the electromagnetic block 72 attracts the magnetic block 71. This force overcomes the reset force of the elastic element between the fixed block 41 and the vertical rod 42, pulling the horizontal plate 44 and the two vertical rods 42 downward together. The downward movement of the vertical rod 42 causes the limiting block 43 at its top to disengage from the bottom of the moving door 31, thereby releasing the mechanical lock on the control door 3. The conveying cavity 421 serves as a channel through the vertical rod 42. Its upper end opens into the lubrication gap, and its lower end connects to the lubricating oil conveying mechanism 6, forming a path for the lubricating oil to reach the surface of the friction pair. When the adjustment is completed and the electromagnetic block 72 is de-energized, the magnetic field disappears. Under the reset action of the elastic element, the vertical rod 42 drives the limiting block 43 to move upward, pressing the bottom of the moving door 31 again, achieving a firm mechanical lock and effectively resisting wind pressure fluctuations.

[0032] The elastic elements providing the restoring force between the fixed block 41 and the vertical rod 42, between the sliding plate 61 and the connecting plate 45, and between the piston rod 65 and the fixed tube 63 can be implemented using various conventional elastic elements in this invention. For example, they can be cylindrical helical springs, disc spring assemblies, or elastic rubber bodies or polyurethane blocks with specific elastic moduli. Specific types and parameters, such as stiffness coefficient and pre-compression, are selected and set according to the required restoring force, stroke space, and environmental conditions in actual applications. The application of these elastic elements is common knowledge in the field of mechanical design, and their selection and calculation are existing technologies, which will not be elaborated here.

[0033] In summary, the limiting lubrication component 4 in this embodiment achieves rapid and reliable unlocking and locking of the control gate 3 through electromagnetic drive. At the same time, the conveying cavity 421 integrated in the vertical rod 42 and the lubrication gap at the top together construct a direct lubrication channel, laying the foundation for subsequent precise lubrication.

[0034] Example 2 Reference Figure 7 - Figure 10 This is Embodiment 2 of the present invention, which further describes in detail the recording component 5 and the lubricating oil delivery mechanism 6.

[0035] To better illustrate the necessity and advantages of this invention, the common problems existing in the lubrication methods of this type of damper in the prior art are further explained. In the prior art, lubricating oil for similar mechanical damper moving parts is usually replenished manually on a regular basis or supplied in a timed and quantitative manner through a centralized lubrication system. These traditional methods have obvious drawbacks: First, the lubrication cycle is unrelated to the actual frequency and amplitude of damper operation, which can easily lead to insufficient lubrication causing increased wear, or excessive lubrication causing grease waste and contamination; Second, the lubricating oil filling point is usually located outside the moving part or far from the core friction surface. The grease relies on its slow penetration and creeping ability to reach the sealed sliding contact area. This process is often delayed and insufficient, making it difficult to ensure the formation of an effective lubricating film when needed; Third, in a dusty environment, externally added grease is easily contaminated, which may actually accelerate wear. These drawbacks cause key friction pairs such as damper guide rails and shafts to be in a poor lubrication state for a long time, which is an important cause of sluggish operation, jamming, and opening drift failures.

[0036] Below the limiting lubrication assembly 4 is a recording assembly 5 for recording travel information in response to the opening and movement of the control gate 3. On one side of the recording assembly 5 is a lubricating oil conveying mechanism 6 for conveying lubricating oil according to the recorded travel information. The lubricating oil conveying mechanism 6 is in fluid communication with the conveying cavity 421 of the limiting lubrication assembly 4.

[0037] The lubricating oil delivery mechanism 6 includes a sliding plate 61 mounted on a connecting plate 45 and capable of sliding in a direction perpendicular to the vertical rod 42. An elastic element providing a restoring force is provided between the sliding plate 61 and the connecting plate 45. A fixed tube 63 is mounted on the sliding plate 61, which is connected to an oil storage tank via a pipeline 64 and also to a delivery chamber 421 via a pipeline 64. Each pipeline 64 is equipped with a one-way valve. An axially movable piston rod 65 is mounted inside the fixed tube 63, and an elastic element providing a restoring force is provided between the piston rod 65 and the fixed tube 63.

[0038] The oil inlet line 64, which connects the oil storage tank and the fixed pipe 63, is equipped with an inlet check valve. This valve allows lubricating oil to flow from the oil storage tank to the fixed pipe 63 and prevents reverse flow. The oil outlet line 64, which connects the fixed pipe 63 and the delivery chamber 421, is equipped with an outlet check valve. This valve allows lubricating oil to flow from the fixed pipe 63 to the delivery chamber 421 and prevents reverse flow. These two check valves work together to ensure that the lubricating oil flows unidirectionally and orderly along the path from the oil storage tank and fixed pipe 63 to the delivery chamber 421 within the system. This effectively prevents backflow or crossflow of lubricating oil when the pressure changes, thereby ensuring that the lubricant is delivered quantitatively and accurately each time it is triggered. The check valve can be a common structure such as a ball valve, cone valve, or diaphragm valve. It is existing technology, and its specific structure and principle will not be described in detail here.

[0039] The recording assembly 5 includes a rotating rod 51 located at the bottom of the sliding plate 61 and capable of moving synchronously with it. One end of the rotating rod 51 is provided with a driven gear 52, and the inner wall of the rotating ring 23 is provided with a toothed block 232 that cooperates with the driven gear 52. A magnetic block 73 is provided on the rotating rod 51, located below the electromagnetic block 72 and arranged with opposite polarity to it. The end of the rotating rod 51 away from the driven gear 52 is connected to an adjusting rod 53 through a ratchet mechanism. One end of the adjusting rod 53 is provided with a cam 54, which abuts against the end of the piston rod 65.

[0040] When the electromagnetic block 72 is energized, it not only attracts magnetic block 71, but also repels magnetic block 73. This repulsive force pushes the sliding plate 61 to move horizontally against the resistance of its elastic element, causing the rotating rod 51 and the driven gear 52 to move together, so that the driven gear 52 and the tooth block 232 on the inner wall of the rotating ring 23 enter the meshing state. The fixed tube 63, the piston rod 65 and its return spring, the oil inlet check valve and the oil outlet check valve together constitute a single-acting plunger pump.

[0041] Electromagnetic block 72 is essentially an electromagnet, the core of which includes a coil wound on a soft magnetic material, such as electrical pure iron. When the coil is energized, the iron core is magnetized, generating a strong magnetic field. Magnetic block 1 71 and magnetic block 2 73 are made of permanent magnet materials, such as neodymium iron boron or aluminum nickel cobalt permanent magnets.

[0042] Its working principle is based on magnetic field interaction: When the electromagnetic block 72 is energized, the end of it near the first magnetic block 71 generates a magnetic pole opposite to the lower end of the first magnetic block 71. For example, if the lower end of the first magnetic block 71 is an N pole, then the upper end of the electromagnetic block 72 generates an S pole. Due to the attraction between opposite magnetic poles, a downward attraction force is generated on the first magnetic block 71, driving the horizontal plate 44 to move downward. At the same time, the magnetic pole generated by the end of the electromagnetic block 72 near the second magnetic block 73 is the same as the magnetic pole of the end of the second magnetic block 73, for example, both are N poles, according to the requirement of relative polarity setting during installation. According to the principle of repulsion between like magnetic poles, the electromagnetic block 72 generates a horizontal repulsive force on the second magnetic block 73, pushing the sliding plate 61 and the rotating rod 51 to move, realizing the meshing of the driven gear 52. This method of using electromagnetic fields to achieve non-contact force transmission and control is widely used in automated equipment and falls within the scope of existing technology.

[0043] Specifically, when the cumulative travel of the control gate 3 reaches the set threshold, the lubricating oil delivery mechanism 6 is triggered and delivers the lubricating oil to the sliding mating part of the control gate 3 via the limit lubrication component 4.

[0044] When the electromagnetic block 72 is energized, the driven gear 52 meshes with the tooth block 232, and the rotation of the rotating rod 51 is completely synchronized with the rotating ring 23. The ratchet mechanism is designed for unidirectional transmission, and the ratchet mechanism is the key component for realizing unidirectional transmission. It is usually composed of an active ratchet, a driven ratchet or pawl, and a spring that keeps the pawl in contact with the ratchet. In this invention, the active ratchet rotates synchronously with the rotating rod 51, and the driven ratchet is fixedly connected to the adjusting rod 53.

[0045] The working process is as follows: When the rotating rod 51 rotates in the opening direction of the damper, for example clockwise, the driving ratchet pushes the driven ratchet or pawl through its tooth surface, thereby driving the adjusting rod 53 and cam 54 to rotate synchronously, realizing the transmission of power and the accumulation of stroke. When the rotating rod 51 rotates counterclockwise in the closing direction of the damper, the inclined surface of the tooth back of the driving ratchet will overcome the spring force, causing the pawl to lift up and slide on the tooth back, or causing the driven ratchet to be in an idle state. At this time, the adjusting rod 53 and cam 54 remain stationary due to their own inertia or slight friction, that is, slippage is achieved.

[0046] Therefore, the ratchet mechanism ensures that only the opening motion of the control gate 3 can be accumulated and recorded, while the closing motion does not affect the accumulated value. The ratchet mechanism is a standard component in mechanical transmission, and its design and working principle are very mature and belong to existing technology. Therefore, its specific structural form will not be described in detail here.

[0047] Specifically, when the rotating rod 51 rotates with the rotating ring 23 in the opening direction, the ratchet mechanism drives the adjusting rod 53 and the cam 54 to rotate. The cam 54 pushes the piston rod 65 to compress its return spring, increasing the volume of the fixed tube 63 and creating a negative pressure. This draws lubricating oil into the fixed tube 63 through the oil inlet check valve, which is the energy storage stage. When the rotating rod 51 rotates with the rotating ring 23 in the closing direction, the ratchet mechanism slips, and the adjusting rod 53 and the cam 54 come to a stop. When the adjusting rod 53 reaches the threshold due to accumulated stroke, it rotates. When the cam 54 passes the highest point of its profile, the pressure of the cam 54 on the piston rod 65 is suddenly released. The piston rod 65 returns to its original position at high speed under the action of its return spring, instantly compressing the volume of the fixed tube 63 to generate high pressure. A certain amount of lubricating oil is injected into the conveying chamber 421 of the vertical rod 42 through the oil outlet check valve and the pipeline 64. The lubricating oil rises through the conveying chamber 421 and is finally squeezed out from the lubrication gap at the top, directly applied to the sliding contact surface between the sliding door 31 and the guide rail 22, completing a precise lubrication.

[0048] It should be noted that during the air intake adjustment process of the manufactured sand production line, when the damper moves from the closed to the open state, the sliding pair between the moving door 31 and the guide rail 22 needs to overcome the maximum static friction and bear the load of the working air pressure. At this time, the friction surface bears a high load and is relatively more prone to wear. When the damper is closed, the movement is mostly a reset process, and it is often completed under system negative pressure or with the assistance of its own structure, so its contribution to the wear of the friction pair is relatively small. Therefore, using the opening stroke as an indicator of the main wear degree is more representative and reasonable. By unidirectionally accumulating the stroke, the system can more accurately correlate lubrication demand with actual wear, avoiding misjudgment of lubrication frequency caused by recording irrelevant or secondary movements, and ensuring the accuracy and economy of lubrication maintenance.

[0049] In summary, the recording component 5 and the lubricating oil delivery mechanism 6 of this embodiment work together to use the mechanical wear of the control gate 3 as the condition for triggering lubrication. Through a purely mechanical structure, adaptive, quantitative, and precise lubrication triggering and execution are achieved.

[0050] As can be seen from Embodiments 1 and 2, the technical solution of the present invention uses the electromagnetic drive component 7 as a unified control hub, combining multiple functions such as unlocking / locking, transmission engagement, stroke accumulation, and lubrication triggering. When the electromagnetic block 72 is energized, it synchronously drives the limit lubrication component 4 to unlock and the recording component 5 to engage. The opening motion of the control gate 3 is accumulated by the recording component 5 and converted into the rotation of the cam 54 and the energy stored in the plunger pump. When the accumulated stroke reaches the target, the stored mechanical energy is released, driving the lubricating oil delivery mechanism 6 to directly pump the lubricant to the friction pair through the channel built into the limit lubrication component 4. The entire process realizes a fully mechanical adaptive closed loop from sensing wear to performing maintenance.

[0051] The significant advantages of this invention are: First, the damper opening is rigidly locked by a purely mechanical limit block clamping method, which has strong resistance to wind pressure fluctuations and ensures process stability.

[0052] Secondly, by using the opening stroke of the damper itself as a measure of wear, the mechanical structure achieves an adaptive match between lubrication frequency and usage intensity, thus solving the problem of inaccurate timed lubrication.

[0053] Third, a direct lubrication channel from the oil reservoir to the friction surface was constructed, and pressure injection ensured that the lubricant could reach the sealed gap, solving the problem of difficult lubrication in traditional methods.

[0054] Fourth, the entire adaptive system is started and stopped in conjunction with the main drive motor, requiring no additional power source or independent controller, resulting in a compact structure and high reliability.

[0055] The working principle of this invention is as follows: When the damper needs to be adjusted, the electromagnetic block 72 is first energized, which unlocks the limit block 43 and engages the driven gear 52. Subsequently, drive motor 25 starts, driving control gate 3 to move. During this period, the cumulative opening stroke of recording component 5 is used to store energy for lubrication pump. After adjustment, the motor stops, the electromagnetic block 72 is de-energized, and the limit block 43 re-locks the damper.

[0056] When the cumulative stroke reaches the threshold, in the next trigger cycle, cam 54 releases piston rod 65, and the stored lubricating oil is injected under high pressure directly to the lubrication point to complete the maintenance. After that, all components reset and wait for the next cycle.

[0057] In summary, this invention, through the electromagnetically linked and uniformly controlled limit lubrication component, mechanical stroke recording component, and plunger pump-type lubricating oil delivery mechanism, collaboratively achieves high-stability locking of the damper and adaptive precision lubrication based on actual wear, effectively improving the long-term operational reliability of the regulating device.

[0058] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions will not cause the essence of the corresponding technical solutions to deviate from the protection scope of the technical solutions of the embodiments of the present invention.

Claims

1. A sand powder content self-adaptive adjusting device for a manufactured sand production line, comprising a wind pipe (1) and a damper assembly (2) for controlling the air inlet amount arranged at one end of the wind pipe (1), characterized in that: The damper assembly (2) includes a fixed plate (21), on which a control gate (3) for adjusting the opening degree is provided. Below the control gate (3) is a limiting lubrication assembly (4) for releasably locking it and establishing a lubrication channel. Below the limiting lubrication assembly (4) is a recording assembly (5) for recording stroke information in response to the opening movement of the control gate (3). On one side of the recording assembly (5) is a lubricating oil conveying mechanism (6) for conveying lubricating oil according to the recorded stroke information. The lubricating oil conveying mechanism (6) is fluidly connected to the limiting lubrication assembly (4). When the cumulative stroke of the opening movement of the control gate (3) reaches a set threshold, the lubricating oil conveying mechanism (6) is triggered and conveys the lubricating oil to the sliding engagement part of the control gate (3) via the limiting lubrication assembly (4).

2. The adaptive adjustment device for sand powder content in the manufactured sand production line according to claim 1, characterized in that: The control gate (3) includes two symmetrically arranged movable gates (31). The fixed plate (21) is provided with a guide rail (22) for guiding the movable gates (31) to move linearly. The fixed plate (21) is rotatably provided with a rotating ring (23). The rotating ring (23) is provided with a rotating plate (24) for driving the movable gates (31). The movable gates (31) are provided with an adjusting protrusion (311). The rotating plate (24) is provided with an arc groove (241) that slides with the adjusting protrusion (311). The inner wall of the rotating ring (23) is provided with a toothed block (231). The fixed plate (21) is provided with a drive motor (25). The output end of the drive motor (25) is provided with a rotating gear (251) that meshes with the toothed block (231).

3. The adaptive adjustment device for sand powder content in the manufactured sand production line according to claim 2, characterized in that: The limiting lubrication assembly (4) includes a fixed block (41) symmetrically arranged at the bottom of the guide rail (22). A vertical rod (42) capable of vertical sliding is provided in the fixed block (41). An elastic element providing a reset elastic force is provided between the fixed block (41) and the vertical rod (42). A limiting block (43) is provided at the top of the vertical rod (42). A lubrication gap is formed between the limiting block (43) and the top of the vertical rod (42). The bottoms of the two vertical rods (42) are connected by a horizontal plate (44). An electromagnetic drive assembly (7) for driving the horizontal plate (44) to move vertically is provided on the horizontal plate (44).

4. The adaptive adjustment device for sand powder content in the manufactured sand production line according to claim 3, characterized in that: The vertical rod (42) is provided with a conveying cavity (421) inside. The conveying cavity (421) is used to convey lubricating oil to the lubrication gap. The lubrication gap is located at the top of the conveying cavity (421). The conveying cavity (421) is connected to the lubricating oil conveying mechanism (6) through a pipeline.

5. The adaptive adjustment device for sand powder content in the manufactured sand production line according to claim 3, characterized in that: The electromagnetic drive assembly (7) includes a magnetic block (71) disposed at the center of the horizontal plate (44), a connecting plate (45) is disposed on the fixing plate (21), an electromagnetic block (72) is fixedly disposed on the connecting plate (45), the electromagnetic block (72) is located below the magnetic block (71), and when the electromagnetic block (72) is energized, it generates an attraction force on the magnetic block (71).

6. The adaptive adjustment device for sand powder content in the manufactured sand production line according to claim 5, characterized in that: The electromagnetic block (72) is connected in parallel with the circuit of the drive motor (25). Before the drive motor (25) starts, the electromagnetic block (72) is energized first. After the drive motor (25) stops, the electromagnetic block (72) is de-energized.

7. The adaptive adjustment device for sand powder content in the manufactured sand production line according to claim 5, characterized in that: The lubricating oil delivery mechanism (6) includes a sliding plate (61) disposed on a connecting plate (45) and capable of sliding in a direction perpendicular to the vertical rod (42). An elastic element providing a restoring force is disposed between the sliding plate (61) and the connecting plate (45). A fixed tube (63) is disposed on the sliding plate (61). The fixed tube (63) is connected to the oil storage tank and the delivery cavity (421) respectively through pipelines (64). A one-way valve is disposed in each pipeline (64). An axially movable piston rod (65) is disposed inside the fixed tube (63). An elastic element providing a restoring force is disposed between the piston rod (65) and the fixed tube (63).

8. The adaptive adjustment device for sand powder content in the manufactured sand production line according to claim 7, characterized in that: The recording component (5) includes a rotating rod (51) disposed at the bottom of the sliding plate (61) and capable of moving synchronously. One end of the rotating rod (51) is provided with a driven gear (52). The inner wall of the rotating ring (23) is provided with a tooth block (232) that cooperates with the driven gear (52). A magnetic block (73) is provided on the rotating rod (51). The magnetic block (73) is located below the electromagnetic block (72) and is arranged opposite to it in polarity. The end of the rotating rod (51) away from the driven gear (52) is connected to an adjusting rod (53) through a ratchet mechanism. One end of the adjusting rod (53) is provided with a cam (54). The cam (54) abuts against the end of the piston rod (65).

9. The adaptive adjustment device for sand powder content in the manufactured sand production line according to claim 8, characterized in that: When the electromagnetic block (72) is energized, it generates a repulsive force on the second magnetic block (73), causing the sliding plate (61) and the rotating rod (51) to move axially, so that the driven gear (52) meshes with the second tooth block (232), and the rotating rod (51) rotates synchronously with the rotating ring (23) under the action of the driven gear (52) and the second tooth block (232).

10. The adaptive adjustment device for sand powder content in the manufactured sand production line according to claim 9, characterized in that: When the rotating rod (51) rotates with the rotating ring (23) in the opening direction, the adjusting rod (53) and the cam (54) are driven to rotate by the ratchet mechanism. The cam (54) pushes the piston rod (65) to draw the lubricating oil in the oil storage cylinder into the fixed pipe (63). When the rotating rod (51) rotates with the rotating ring (23) in the closing direction, the ratchet mechanism slips, and the adjusting rod (53) and the cam (54) stop. When the adjusting rod (53) rotates to the point where the cam (54) passes the contour high point, the piston rod (65) returns to its original position under the action of the reset force, and the lubricating oil accumulated in the fixed pipe (63) is pressed into the conveying cavity (421) through the pipeline (64).

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