Drum screen with adjustable inclination angle
By designing an adjustable inclination structure in the drum screen, combined with reasonable gravity distribution and vibration buffering measures, the problems of fixed inclination angle and short service life of the existing drum screen are solved, and the flexibility and long life of the drum screen are achieved.
Patent Information
- Application Number
- CN202421184358.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-28
- Publication Date
- 2025-02-18
- Estimated Expiration
- 2034-05-28
AI Technical Summary
The inclination angle of the existing drum screen is fixed, which cannot meet the requirements of different material screening and production speeds, and the vibration and friction of the inclination angle adjustment mechanism lead to a reduced service life.
A drum screen with adjustable inclination angle is designed, which is hinged with the inclined frame through a hinge support, and the lifting mechanism is located at the eccentric end of the center of gravity of the inclined frame, reasonably allocate the gravity ratio at both ends of the inclined frame to reduce the bearing capacity requirements of the lifting mechanism, and The impact of vibration on the lifting mechanism is reduced through the buffer assembly and the counterweight assembly.
The inclination angle of the drum screen is adjustable, which meets the requirements of different material screening and production speeds, reduces the bearing capacity and vibration influence of the lifting mechanism, extends the service life and reduces the maintenance rate.
Smart Images
Figure CN222490888U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of material screening, in particular to a drum screen with adjustable inclination angle. Background Art
[0002] In the manufacturing process of many products, it is necessary to screen the raw materials or waste materials required in the manufacturing process. For example, in the manufacturing process of paper and wood-based panels, it is necessary to screen bulk raw materials such as fine powder, shavings, long shavings, or waste materials such as sawdust for subsequent processing. The more commonly used screening device is the drum screen equipment, which installs the screen body on an inclined frame. The reduction motor is connected to the screen body through a certain transmission method. When the material enters the screen body, the material rotates with the screen body inclined on the frame, and the smaller material is discharged from the bottom discharge port, and the larger material is discharged from the tail discharge port.
[0003] In the above drum screen, the screen body is installed on the frame, and the inclination angle is fixed because the frame is fixed. When different materials need to be screened due to production needs or the production speed needs to be increased due to output needs, these changing needs cannot be met due to the fixed inclination angle.
[0004] In some designs of drum screens with adjustable inclination angles, a common solution is to hinge one end of the screen body and raise and lower the other end through a cylinder or other adjustment components, thereby changing the relative height of the two ends of the screen body. However, in this solution, the cylinder or adjustment mechanism needs to directly bear the weight of the drum screen and support its operation, which places high load requirements on the cylinder or adjustment mechanism. In addition, the screen drum will actively or passively vibrate during operation, and the cylinder or adjustment mechanism, as a supporting structure, bears additional loads. These vibrations will cause increased friction and wear of the internal components of the cylinder, thereby greatly reducing its service life. Utility Model Content
[0005] The utility model aims to provide a drum screen with adjustable inclination angle to solve the above problems in the prior art.
[0006] Provided is a drum screen with adjustable inclination angle, comprising:
[0007] An inclined frame, on which a screen drum assembly is arranged;
[0008] A support frame, comprising a hinge support, the support frame being hingedly connected to a middle region of the tilt frame via the hinge support;
[0009] The lifting mechanism is arranged at the eccentric end of the center of gravity of the tilting frame after the tilting frame is hinged to the supporting frame, and the gravity ratio of the two ends of the tilting frame is 6 to 9:10.
[0010] The screen drum assembly usually includes a motor, a coupling and a screen drum connected in sequence. The screen drum is driven by the motor to rotate inside the tilting frame to screen the material. The support frame is fixed to the ground, and the two sides of the tilting frame are hinged to the support frame through hinge supports. It can rotate relative to the support frame, so that the inclination angle of the tilting frame can be adjusted. The support frame is the main supporting structure of the tilting frame and can bear most of the weight of the tilting frame and the screen drum assembly. The height of the lifting mechanism is adjustable and is located at one end of the tilting frame to stabilize the inclination angle of the tilting frame and play a role of auxiliary support. Since most of the overall weight of the tilting frame is on the support frame, the pressure on the lifting mechanism is relatively small, which can protect the lifting mechanism.
[0011] When the tilting frame is hinged to the support frame, the gravity at both ends of the tilting frame needs to be reasonably distributed so that the gravity at one end is greater and the gravity at the other end is smaller. The lifting mechanism is located at the end with greater gravity of the tilting frame, so that the lifting mechanism is always in a compressed state, reducing the frequency of changes in the force state of the lifting mechanism. The gravity ratio at both ends of the tilting frame cannot be too small. If it is too small, the lifting mechanism will bear a large weight, reducing the protection of the lifting mechanism. The gravity ratio at both ends of the tilting frame cannot be too large. If it is too large, when the material enters the screen drum assembly, it will easily cause the center of gravity to shift to the other end of the tilting frame in a chaotic state, causing the lifting mechanism to be in a tensile state.
[0012] Furthermore, the gravity ratio of the two ends of the tilting frame is 7 to 8:10. Within this range, the load-bearing value of the lifting component is reasonably distributed and the force state of the lifting component is kept stable.
[0013] Furthermore, the lifting mechanism is an actuator, and the output end of the lifting mechanism is slidably connected to the tilt frame through a hinge. The actuator is a component such as a cylinder, an oil cylinder or an electric cylinder for driving the extension. The lifting mechanism is fixedly connected to the ground, and when the lifting mechanism is extended or retracted, the output shaft of the lifting mechanism will slide relative to the tilt frame to prevent interference.
[0014] Furthermore, the lifting mechanism is an actuator, the output end of the lifting mechanism is hinged to the tilt frame, and the cylinder of the lifting mechanism is hinged to the ground. The actuator is a component such as a pneumatic cylinder, an oil cylinder or an electric cylinder for driving extension and retraction. When the lifting mechanism is extended and retracted, the cylinder and the output end of the lifting mechanism are deflected relative to the tilt frame under the adjustment of the hinge to prevent interference.
[0015] Furthermore, a buffer assembly is arranged between the output end of the lifting mechanism and the tilting frame. When the screen drum assembly generates vibration during operation, the buffer assembly can play a buffering role and reduce the influence of the vibration on the lifting mechanism.
[0016] Furthermore, a counterweight assembly is provided at one end of the tilt frame away from the lifting mechanism. When the tilt angle of the tilt frame changes, the force acting on the lifting mechanism will also change. In order to keep the lifting mechanism always within a reasonable force range, the counterweight assembly is used to balance the forces acting on both ends of the tilt frame, and the forces acting on the lifting mechanism are transmitted to the support frame to protect the lifting mechanism.
[0017] Furthermore, the counterweight assembly is a chain and a tray, the tray is connected to the end of the tilting frame through the chain, and a weight can be set on the tray. The counterweight is achieved by adding or removing the weight on the tray.
[0018] Furthermore, the counterweight assembly is a chain and a traction mechanism, and the traction mechanism can pull the end of the tilt frame through the chain. The traction mechanism can pull the chain and apply a downward pulling force to the tilt frame through the chain, thereby achieving a counterweight effect.
[0019] Furthermore, it also includes a driving mechanism, and the lifting mechanism is a telescopic rod, and the driving mechanism is connected to the axis of the hinge support. The telescopic rod only includes the functions of passive telescoping and maintaining the shape through the fixed component after telescoping, which is used to maintain the inclination angle of the tilting frame unchanged. The inclination angle of the tilting frame is adjusted by the driving mechanism, and the driving mechanism drives the hinge support to rotate, and the hinge support then drives the tilting frame to rotate. The advantage of this structure is that most of the vibration generated by the screen drum assembly is transmitted to the support frame through the tilting frame, and the support frame maintains the overall stability of the drum screen. The vibration has little effect on the driving mechanism, which can effectively protect the driving mechanism.
[0020] Furthermore, the drive mechanism is connected to the axis of the hinge support through an electromagnetic coupling, which transmits torque through the non-contact electromagnetic induction principle. When the main structure of the drum screen vibrates, the drive mechanism is hardly affected by the vibration.
[0021] Compared with the prior art, the beneficial effects of the present invention are:
[0022] By reasonably distributing the gravity of the screen drum assembly and the tilting frame, most of the weight and vibration effects are borne by the support frame, and the lifting mechanism only plays an auxiliary supporting and stabilizing role, which reduces the load-bearing requirements of the lifting mechanism, reduces the impact of vibration on the lifting mechanism, effectively protects the components of the lifting mechanism, and increases the service life. By limiting the distribution ratio of the gravity at both ends of the tilting frame, the stability of the force state of the lifting mechanism is improved. The design structure is reasonably arranged, which significantly increases the service life of the overall and local components of the drum screen and reduces the maintenance rate. BRIEF DESCRIPTION OF THE DRAWINGS
[0023] In order to facilitate understanding by those skilled in the art, the present invention is further described below in conjunction with the accompanying drawings.
[0024] Figure 1 It is a schematic diagram of the overall structure of a drum screen with adjustable inclination;
[0025] Figure 2 A schematic diagram of the structure of the drum screen provided in Example 2;
[0026] Figure 3 A top view of the drum screen provided for Example 5.
[0027] In the figure: 1. tilting frame; 11. screen drum assembly; 2. support frame; 21. hinge support; 3. lifting mechanism; 4. driving mechanism; 5. buffer assembly; 6. counterweight assembly. DETAILED DESCRIPTION
[0028] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the utility model and are not used to limit the utility model, that is, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. The components of the embodiments of the utility model described and shown in the drawings here can be arranged and designed in various different configurations.
[0029] Therefore, the following detailed description of the embodiments of the utility model provided in the accompanying drawings is not intended to limit the scope of the utility model claimed for protection, but merely represents selected embodiments of the utility model. Based on the embodiments of the utility model, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the utility model.
[0030] See also Figure 1 As shown, in an embodiment of the utility model, a drum screen with adjustable inclination angle includes an inclined frame 1, a supporting frame 2 and a lifting mechanism 3, and a screen drum assembly 11 is arranged on the inclined frame 1; the supporting frame 2 includes a hinge support 21, and the supporting frame 2 is hinged to the middle area of the inclined frame 1 through the hinge support 21; when the inclined frame 1 is hinged to the supporting frame 2, the lifting mechanism 3 is arranged at the eccentric end of the center of gravity of the inclined frame 1, and the gravity ratio at both ends of the inclined frame 1 is 6 to 9:10.
[0031] Example 1
[0032] See also Figure 1As shown, the lifting mechanism 3 is an actuator, which is used to drive the end of the tilt frame 1 to move up and down, thereby adjusting the overall inclination value of the tilt frame 1. In order to avoid interference between the output end of the lifting mechanism 3 and the support frame 2 during the lifting process, the output end of the lifting mechanism 3 is connected to the tilt frame 1 through a hinge. After the output end of the lifting mechanism 3 is extended and retracted, the output end slides with the bottom surface of the tilt frame 1, and the relative inclination angle between the output end and the tilt frame 1 is adjusted through the hinge. This structure can fix the cylinder of the lifting mechanism 3 on the ground and keep it motionless, reducing the movement of the lifting mechanism 3.
[0033] Example 2
[0034] See also Figure 2 As shown, the lifting mechanism 3 is an actuator, which is used to drive the end of the tilt frame 1 to lift and lower, thereby adjusting the overall tilt angle value of the tilt frame 1. The output end of the lifting mechanism 3 is hinged to the tilt frame 1, and the cylinder of the lifting mechanism 3 is hinged to the ground. When the output end of the lifting mechanism 3 is extended and retracted, the cylinder of the lifting mechanism 3 and the telescopic rod change their overall lengths to produce relative tilt angle changes with the ground and the tilt frame 1, respectively, to avoid interference with the support frame 2.
[0035] In a further solution of Embodiment 1 and Embodiment 2, a buffer component 5 is provided between the output end of the lifting mechanism 3 and the tilting frame 1. The buffer component 5 may be a suspension structure composed of springs, which plays a buffering role, is used to reduce the vibration transmitted from the tilting frame 1, prevent the internal parts of the lifting mechanism 3 from being worn, and increase the service life of the lifting mechanism 3.
[0036] Example 3
[0037] A counterweight assembly 6 is provided at one end of the tilting frame 1 away from the lifting mechanism 3. The counterweight assembly 6 is used to counterweight the tilted end of the tilting frame 1 to prevent the lifting mechanism 3 from increasing the force due to the change in the inclination angle of the tilting frame 1. The counterweight assembly 6 is a chain and a tray, and the two ends of the chain are respectively connected to the tilting frame 1 and the tray. Weights can be set on the tray, and the counterweight can be changed by adding or removing the weights to balance the force on the lifting mechanism 3. It should be noted here that when the weights are added, although the force on the lifting mechanism 3 is reduced, the force on the support frame 2 will increase accordingly. However, the support frame 2 plays a major supporting role at the beginning of the design. Within the design range of the load-bearing capacity, the support frame 2 will not produce wear and loss, and will not affect the service life.
[0038] Example 4
[0039] The counterweight assembly 6 is a chain and a traction mechanism, the traction mechanism can be a winch, the end of the chain is wound around the rotating shaft of the winch, and the motor drives the rotating shaft of the winch to control the tension generated by the chain on the tilting frame 1. The advantage of this solution over embodiment 3 is that it does not need to manually add weights to adjust the counterweight, but is automatically adjusted through the traction mechanism, and the counterweight adjustment is highly accurate and can be set to any value.
[0040] Example 5
[0041] See also Figure 1 and Figure 3 As shown, the lifting mechanism 3 is a telescopic rod, which has the functions of length adjustment and fixed length, but the part that does not participate in the driving is only used as a part to maintain the tilt angle state of the tilt frame 1. The driving part for tilt angle adjustment is the driving mechanism 4, which is specifically a driving motor. The driving mechanism 4 drives the axis of the hinge support 21 to rotate, and then drives the tilt frame 1 to rotate. When the tilt angle of the tilt frame 1 needs to be adjusted, the fixing of the lifting mechanism 3 is released, and the driving mechanism 4 is started to drive the tilt frame 1 to rotate. The lifting mechanism 3 is extended and retracted to adapt to the height of the corresponding end of the tilt frame 1, and the fixed part of the lifting mechanism 3 is closed again after rotating to a certain angle. The fixed part of the lifting mechanism 3 can be controlled manually or by an electrical signal control device. This part is a prior art, and the specific structure will not be described in detail here.
[0042] Example 6
[0043] Embodiment 6 is a further solution based on embodiment 5, in which the drive mechanism 4 is connected to the axis of the hinge support 21 through an electromagnetic coupling. The electromagnetic coupling transmits torque through the electromagnetic principle, and there is no mechanical contact between the driving end and the driven end. Therefore, when the hinge support 21 transmits vibration, the drive mechanism 4 will not be affected by the vibration.
[0044] The above contents are merely examples and explanations of the structure of the utility model. The technicians in this technical field may make various modifications or additions to the specific embodiments described or replace them in a similar manner. As long as they do not deviate from the structure of the utility model or exceed the scope defined in the claims, they should all fall within the protection scope of the utility model.
Claims
1. A drum screen with adjustable inclination, characterized in that: include: An inclined frame (1), wherein a screen drum assembly (11) is arranged on the inclined frame (1); A support frame (2), comprising a hinge support (21), wherein the support frame (2) is hingedly connected to the middle region of the tilting frame (1) via the hinge support (21); The lifting mechanism (3) is arranged at an eccentric end of the center of gravity of the tilting frame (1) after the tilting frame (1) is hinged to the support frame (2), and the gravity ratio of the two ends of the tilting frame (1) is 6 to 9:
10.
2. A drum screen with adjustable inclination according to claim 1, characterized in that: The lifting mechanism (3) is an actuator, and the output end of the lifting mechanism (3) is slidably connected to the tilting frame (1) via a hinge.
3. The inclination-adjustable drum screen according to claim 1, characterized in that: The lifting mechanism (3) is an actuator, the output end of the lifting mechanism (3) is hinged to the tilting frame (1), and the cylinder body of the lifting mechanism (3) is hinged to the ground.
4. A drum screen with adjustable inclination according to claim 2 or 3, characterized in that: A buffer assembly (5) is provided between the output end of the lifting mechanism (3) and the tilting frame (1).
5. The inclination-adjustable drum screen according to claim 1, characterized in that: A counterweight assembly (6) is provided at one end of the tilting frame (1) away from the lifting mechanism (3).
6. The drum screen with adjustable inclination according to claim 5, characterized in that: The counterweight assembly (6) comprises a chain and a tray, the tray is connected to the end of the tilting frame (1) via the chain, and a weight can be arranged on the tray.
7. The inclination-adjustable drum screen according to claim 5, characterized in that: The counterweight assembly (6) is a chain and a traction mechanism, and the traction mechanism can pull the end of the tilting frame (1) through the chain.
8. The drum screen with adjustable inclination according to claim 1, characterized in that: It also includes a driving mechanism (4), the lifting mechanism (3) is a telescopic rod, and the driving mechanism (4) is connected to the axis of the hinge support (21) by transmission.
9. The drum screen with adjustable inclination according to claim 8, characterized in that: The driving mechanism (4) is connected to the axis of the hinge support (21) via an electromagnetic coupling.