Sliding needle device for cleaning roller screen

Abstract

The utility model discloses a sliding needle device for cleaning a roller screen, and particularly relates to the field of roller screen cleaning equipment, the sliding needle device comprises a shell, a first limiting shaft, a reset spring, a first connecting block and a sliding block, a groove is dug in an inner cavity of the shell, the first limiting shaft is arranged on the inner side of the groove, and the first limiting shaft is connected with one end of the reset spring in a buckling mode; the end, away from the first limiting shaft, of the reset spring is in buckled connection with a first connecting block, sliding blocks are arranged on the two sides of the first connecting block, and sliding grooves are formed in the contact faces of the sliding blocks and the inner wall of the groove. Firstly, the device is installed over the device, the sweeping rods in the device are located between roller gaps, when foreign matter exists between the roller gaps, the contact faces between the sweeping rods and the roller gaps are triangular, the foreign matter can be guided out conveniently, and the effect of cleaning the roller gaps is achieved; the cleaning rod slides and passes through the upper surface of the foreign matter due to the reset spring, and the cleaning rod cleans the roller gap again due to falling of the reset spring.

Description

Technical Field

[0001] This utility model relates to the field of roller screen cleaning equipment, and more specifically, to a sliding needle device for roller screen cleaning. Background Technology

[0002] During the ball screening process of a roller screen, roller gap blockage can be roughly divided into two situations: In the first situation, some large balls will get stuck in the roller gap and rotate with two adjacent rollers. As the rotation time increases, the large balls will gradually change from spherical to cylindrical. Multiple large balls lined up end to end in the roller gap will completely block it. When qualified balls reach the roller gap, because the large balls have blocked the roller gap, the qualified balls cannot fall through the roller gap and become returned material, resulting in waste. In the second situation, foreign objects in the green balls get stuck in a relatively fixed position in the roller gap. During the continuous rotation of the two adjacent rollers, friction occurs between the rollers and the foreign objects. Over time, grooves will be generated at the friction points between the rollers and the foreign objects. In severe cases, this can lead to roller breakage and affect the service life of the rollers.

[0003] Both of these situations will seriously affect production, so the roller gaps must be cleaned regularly. There are generally two existing cleaning methods: one is manual cleaning using a long-handled rake with a single tooth. Since the equipment is running normally during cleaning, the cleaning work is time-consuming, labor-intensive, and carries certain risks. The other is equipment that simulates manual cleaning, with a row of rake teeth cleaning all the roller gaps at the same time. This method is quick and safe, but since the rake teeth are fixed to the equipment, when the rake teeth come into contact with foreign objects stuck between the roller screens, if the rake teeth cannot push the foreign objects out of the roller gaps, the rake teeth will be stuck by the foreign objects. At this time, the equipment is still running. Since the rake teeth are fixed to the equipment and cannot move, the rake teeth will bend or break directly. The bent rake teeth can no longer clean the roller gaps and may come into contact with the rollers, causing wear to the rollers.

[0004] Therefore, a sliding needle device for cleaning roller screens is proposed to address the above problems. Utility Model Content

[0005] In order to overcome the above-mentioned defects of the prior art, the present invention provides a sliding needle device for cleaning roller screens to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a sliding needle device for cleaning a roller screen, comprising a housing, a first limiting shaft, a return spring, a first connecting block, and a slider. The inner cavity of the housing is provided with a groove, and the inner side of the groove is provided with the first limiting shaft. The first limiting shaft is fastened to one end of the return spring, and the end of the return spring away from the first limiting shaft is fastened to the first connecting block. Slider blocks are provided on both sides of the first connecting block, and a groove is provided on the contact surface between the slider and the inner wall of the groove. A connecting rod is provided on the end of the first connecting block away from the return spring, and several sets of second connecting blocks are provided on the outer diameter surface of the connecting rod. A stop block is provided on one side of the second connecting block. The connecting rod longitudinally passes through the second limiting shaft and is connected to a cleaning rod. A through groove is provided on the contact surface between the connecting rod and the second limiting shaft.

[0007] Preferably, the first connecting block forms a sliding structure with the sliding groove on the inner wall of the groove via a slider, and the connecting rod forms a sliding structure with the second limiting shaft via a through groove.

[0008] Preferably, there are three sets of the second connecting block and the stop block, and the three sets of the second connecting block and the stop block are evenly and alternately arranged on the outer diameter surface of the connecting rod.

[0009] Preferably, one end of the sweeping rod is triangular, and the ends of the sweeping rod are connected to form a closed loop.

[0010] The technical effects and advantages of this utility model are as follows:

[0011] Compared with the prior art, the sliding needle device for cleaning roller screens is first installed directly above the screen, with the cleaning rod located between the roller gaps. When there are foreign objects between the roller gaps, the contact surface between the cleaning rod and the roller gaps is triangular, which facilitates the removal of foreign objects and achieves the effect of cleaning the roller gaps. When the cleaning rod encounters foreign objects that cannot be cleaned, the cleaning rod will slide through the upper surface of the foreign object due to the return spring, and the cleaning rod will fall back down due to the return spring, thereby cleaning the roller gaps again.

[0012] Compared with existing technologies, this sliding needle device for cleaning roller screens, when in use, maintains a vertical position for the cleaning rod and connecting rod under the tension of springs when no external force is applied. In this position, the second connecting block and the stop block provide positioning. When the connecting rod moves along the roller gap direction, the cleaning rod contacts the material ball or foreign object. When the cleaning rod is subjected to a lateral force along the roller gap direction, the connecting rod remains vertical as long as the torque generated by the lateral force is not greater than the resultant torque of the return spring, the second connecting block, and the stop block. When the lateral force torque exceeds the resultant torque of the return spring, the second connecting block, and the stop block, the connecting rod begins to rotate from the vertical position. The larger the rotation angle, the more likely it is to rotate. The greater the tension of the return spring, the greater the thrust generated along the roller gap direction by the connecting rod driving the cleaning rod. The cleaning rod only has one degree of freedom to rotate along the roller gap direction and cannot move perpendicular to the roller gap. This can prevent the cleaning rod from contacting adjacent rollers and also prevent the cleaning rod from being impacted by the material flow and detaching from the roller gap when it crosses obstacles. It can effectively prevent the cleaning rod from rubbing against the rollers during operation. The contact part between the cleaning rod and the material ball is designed with a triangular shape. When the hypotenuse of the triangle contacts the material ball or foreign object, the hypotenuse will give the material ball or foreign object an upward thrust, making it easier for the material ball or foreign object to overcome gravity and detach from the roller gap, thus improving the cleaning effect. Attached Figure Description

[0013] Figure 1 This is a top-section structural diagram of the present invention.

[0014] Figure 2 This is a side sectional view of the present invention.

[0015] The attached figures are labeled as follows: 1. Housing; 2. First limiting shaft; 3. Return spring; 4. First connecting block; 5. Slider; 6. Groove; 7. Slide groove; 8. Connecting rod; 9. Second connecting block; 10. Stop block; 11. Second limiting shaft; 12. Cleaning rod; 13. Through groove. Detailed Implementation

[0016] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0017] Example 1

[0018] As attached Figures 1 to 2The illustrated roller screen cleaning device includes a housing 1, a first limiting shaft 2, a return spring 3, a first connecting block 4, and a slider 5. The inner cavity of the housing 1 is provided with a groove 6, and the first limiting shaft 2 is provided on the inner side of the groove 6. The first limiting shaft 2 is fastened to one end of the return spring 3, and the end of the return spring 3 away from the first limiting shaft 2 is fastened to the first connecting block 4. Slider 5 is provided on both sides of the first connecting block 4. The contact surface between the slider 5 and the inner wall of the groove 6 is provided with a sliding groove 7. The end of the first connecting block 4 away from the return spring 3 is provided with a connecting rod 8, and a plurality of second connecting blocks 9 are provided on the outer diameter surface of the connecting rod 8. A stop block 10 is provided on one side of the second connecting block 9. The connecting rod 8 longitudinally passes through the second limiting shaft 11 and is connected to a cleaning rod 12. The contact surface between the connecting rod 8 and the second limiting shaft 11 is provided with a through groove 13.

[0019] Specifically: When there is no external force, the cleaning rod 12 and connecting rod 8 remain vertical under the tension of the spring. In this position, the second connecting block 9 and the stop block 10 provide positioning. When the connecting rod 8 moves along the roller gap, the cleaning rod 12 contacts the material ball or foreign object. When the cleaning rod 12 is subjected to a lateral force along the roller gap, and the torque generated by this lateral force is less than the resultant torque of the return spring 3 and the second connecting block 9 and the stop block 10, the connecting rod 8 remains vertical. When the lateral force torque is greater than the resultant torque of the return spring 3 and the second connecting block 9 and the stop block 10, the connecting rod 8 begins to rotate from its vertical position. The larger the rotation angle, the more stable the return. The greater the tension of spring 3, the greater the thrust generated by connecting rod 8 driving cleaning rod 12 along the roller gap direction. Cleaning rod 12 has one degree of freedom to rotate along the roller gap direction, but cannot move perpendicular to the roller gap, thus preventing cleaning rod 12 from contacting adjacent rollers. It also prevents cleaning rod 12 from detaching from the roller gap when crossing obstacles, and prevents cleaning rod 12 from rubbing against rollers during operation. The contact part of cleaning rod 12 with the material ball has a triangular shape design. When the hypotenuse of the triangle contacts the material ball or foreign object, the hypotenuse will give the material ball or foreign object an upward thrust, making it easier for the material ball or foreign object to overcome gravity and detach from the roller gap, thus improving the cleaning effect.

[0020] Example 2

[0021] Based on Example 1, the solution in Example 1 will be further described in detail below with reference to the specific working method, such as... Figures 1 to 2 As shown below, see details:

[0022] In a preferred embodiment, the first connecting block 4 forms a sliding structure with the sliding groove 7 on the inner wall of the groove 6 via the slider 5, and the connecting rod 8 forms a sliding structure with the second limiting shaft 11 via the through groove 13.

[0023] In a preferred embodiment, three sets of the second connecting block 9 and the stop block 10 are provided, and the three sets of the second connecting block 9 and the stop block 10 are evenly and alternately arranged on the outer diameter surface of the connecting rod 8.

[0024] In a preferred embodiment, one end of the sweeping rod 12 is triangular, and the sweeping rod 12 is connected end to end to form a closed loop.

[0025] The working process of this utility model is as follows: First, this device is installed directly above the roller gap, and the cleaning rod 12 in this device is located between the roller gaps. When no external force is applied, the cleaning rod 12 and connecting rod 8 are kept vertical by the spring tension. The connecting rod 8 is positioned by the second connecting block 9 and the stop block 10. When the connecting rod 8 moves along the roller gap direction, the cleaning rod 12 contacts the material ball or foreign object, causing the foreign object to detach from the roller gap. When the cleaning rod 12 is subjected to a lateral force along the roller gap direction, and the torque of the lateral force is less than the resultant torque of the return spring 3 and the second connecting block 9 and the stop block 10, the connecting rod 8 remains vertical. When the torque of the lateral force is greater than the resultant torque of the return spring 3 and the second connecting block 9 and the stop block 10, the connecting rod 8 remains vertical. When the torque is applied, the connecting rod 8 flips from the vertical position. The larger the flip angle, the greater the tension of the return spring 3, which in turn makes the connecting rod 8 drive the cleaning rod 12 to generate a greater thrust along the roll gap direction. The cleaning rod 12 has one degree of freedom to flip along the roll gap direction, but cannot move in the vertical direction of the roll gap. This prevents the cleaning rod 12 from contacting adjacent rollers and also prevents the cleaning rod 12 from being impacted by the material flow and leaving the roll gap when it flips over obstacles. It also prevents the cleaning rod 12 from rubbing against the rollers during operation. The contact part of the cleaning rod 12 with the material ball has a triangular shape design. When the hypotenuse of the triangle contacts the material ball or foreign object, the hypotenuse will give the material ball or foreign object an upward thrust, making it easier for the material ball or foreign object to overcome gravity and get out of the roll gap.

Claims

1. A slide pin device for roller screen cleaning, comprising a shell (1), a first limiting shaft (2), a return spring (3), a first connecting block (4) and a sliding block (5), characterized in that: The inner cavity of the shell (1) is provided with a groove (6), and the inner side of the groove (6) is provided with a first limiting shaft (2), one end of the first limiting shaft (2) is connected with a reset spring (3), and the other end of the reset spring (3) away from the first limiting shaft (2) is connected with a first connecting block (4), both sides of the first connecting block (4) are provided with a sliding block (5), the contact surface between the sliding block (5) and the inner wall of the groove (6) is provided with a sliding groove (7), the end of the first connecting block (4) away from the reset spring (3) is provided with a connecting rod (8), and the outer diameter surface of the connecting rod (8) is provided with a plurality of groups of second connecting blocks (9), one side of the second connecting block (9) is provided with a stop block (10), the connecting rod (8) longitudinally penetrates the second limiting shaft (11) and is connected with a cleaning rod (12), and the contact surface between the connecting rod (8) and the second limiting shaft (11) is provided with a through groove (13).

2. A slide pin device for cleaning a roller screen as defined in claim 1, wherein: The first connecting block (4) and the sliding groove (7) on the inner wall of the groove (6) constitute a sliding structure through the sliding block (5), and the connecting rod (8) and the second limiting shaft (11) constitute a sliding structure through the through groove (13).

3. A slide needle device for cleaning a roller screen as defined in claim 1, wherein: The second connecting block (9) and the stop block (10) are provided with three groups, and the three groups of the second connecting block (9) and the stop block (10) are evenly staggered and arranged on the outer diameter surface of the connecting rod (8).

4. A slider device for cleaning a roller screen as defined in claim 1, wherein: One end of the cleaning rod (12) is triangular, and the cleaning rod (12) is connected in a closed loop.

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