High-frequency vibration classifying screen
Through high-frequency vibration grading screening and airflow sorting technology, the existing sand and gravel material screening equipment has been solved, and efficient and accurate material screening has been achieved, which has reduced energy consumption and noise and improved screening Efficiency and output.
Patent Information
- Application Number
- CN202420943392.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-30
- Publication Date
- 2024-12-20
- Estimated Expiration
- 2034-04-30
AI Technical Summary
The existing vibrating screens of sand and gravel materials consume a lot of energy during the screening process, the shear springs bear a large load, and the production and use cost is high, and the efficiency and accuracy are insufficient.
A high-frequency vibration grading screen was designed, using an inclined screen box and a high-frequency vibration beam, combined with airflow sorting technology, and efficient grading of materials is achieved through high-frequency vibration and screen tensioning structure, reducing additional energy. Consumption and equipment noise improve screening accuracy and output.
It realizes efficient and accurate material screening, suitable for material screening less than 35mm, reduces screening pressure, reduces equipment noise and maintenance difficulty, improves screening efficiency and output, and reduces energy consumption and steel structure support costs.
Smart Images
Figure CN222197815U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of material screening, in particular to a high-frequency vibration grading screen. Background Art
[0002] Vibrating screen is one of the main equipment for screening sand and gravel materials. In order to sort out materials with different particle sizes, it is necessary to use vibrating screen to sort the materials with different particle sizes in multiple stages.
[0003] There are two types of vibrating screens for sand and gravel materials on the market: circular vibrating screen and linear screen. The circular vibrating screen is a screen that uses an unbalanced weight exciter to vibrate the screen box. Its motion trajectory is generally circular. Due to the circular vibration trajectory of its screen surface, the material on the screen surface is constantly flipped and loosened, so the fine particles have the opportunity to move to the lower part of the material layer and be discharged through the screen holes. The linear vibrating screen is a screen that has two motors placed synchronously in opposite directions and installed on the side of the screen box, so that the exciter generates a reverse exciting force. The vibration motor is used as the vibration source to force the screen body to drive the screen to move longitudinally, so that the material is thrown up on the screen and moves forward in a straight line. Both vibrating screens use the screen box vibration method, which consumes a lot of energy, and the shear spring bears a large load, so the strength of the steel structure must be greatly enhanced. Overall, this vibration method is relatively wasteful, which greatly increases the cost of production and use. Utility Model Content
[0004] The purpose of the utility model is to provide a high-frequency vibration grading screen to solve the problems raised in the above background technology.
[0005] To achieve the above purpose, the utility model provides the following technical solutions: a high-frequency vibration grading screen, comprising a screen box, a feed port is provided at the top of the screen box, a screen hopper is installed at the bottom of the screen box, a fine particle discharge port is provided at the bottom of the screen hopper, a screen box cover is installed at the outside of one end of the screen box, a crossbeam is installed at the bottom of the screen box cover, an exciting beam is installed between the inner sides of the screen box, a screen mesh is provided at the top of the exciting beam, and the screen mesh is tensioned by a screen mesh tensioning structure;
[0006] The screen box is in an inclined state and can be configured accordingly according to the different screening materials and the size of the raw materials. Both sides of the exciting beam are connected to the screen box through shear springs.
[0007] Furthermore, a screen hook pulling beam is installed on the inner wall of the screen box, and a screen tensioning structure is movably installed in the screen hook pulling beam, and the screen tensioning structure is used to tension the screen.
[0008] Furthermore, a circular main beam is installed between the inner sides of the excitation beams, the circular main beam is connected to the inner sides of the excitation beams through rib plates, and a beating strip is installed at the top of the excitation beam, and the beating strip is made of rubber.
[0009] Furthermore, a protective plate is installed at the bottom end of the excitation beam, and an excitation motor is installed at the bottom end of the protective plate.
[0010] Furthermore, the screen tensioning structure includes a screen tensioning beam connected to the screen hook tensioning beam, the screen tensioning beam is connected to the screen, and a screen drag is installed at the bottom end of the screen, and the screen drag is connected to the screen box.
[0011] Furthermore, a protective rubber is provided at the top of the screen tensioning structure, and an adjustment structure is provided between the screen tensioning structures, the adjustment structure includes a tensioner installed on the inner side of the screen box, a steel wire rope is installed between the tensioners through a tension spring, and a pulling arm is installed at one end of the tensioner.
[0012] Furthermore, the bottom end of the screen box is respectively provided with a coarse particle discharge port and a shock absorber, and an inspection door is hingedly installed on the outer side of one end of the hopper under the screen.
[0013] Furthermore, the inclination angle of the entire screen box is 35-45 degrees, and it can be configured accordingly according to the different screening raw materials and the size of the raw materials. The number of screen excitation beams at the top of the first layer of screen is 3-5 groups, and the number of other screen excitation beams is 2-3 groups. The screens can be arranged in 1-4 layers up and down, and increasing the number of layers can increase the number of screening stages. Each layer of screens can be provided with 2-5 pieces, and increasing the screens can improve the screening accuracy. The screen width can be set to 1.5-2.5 meters, and increasing the screen width can increase the output.
[0014] Compared with the prior art, the beneficial effects of the utility model are:
[0015] The high-frequency vibration grading screen combines vibration conveying and dispersion, airflow sorting and high-frequency vibration screening structure, with high screening efficiency and high precision, and is suitable for screening and filtering of materials less than 35mm. The blower can intelligently adjust the air volume, control the screening wind force, and clean the surface of the machine-made sand at the same time. The design of the air inlet improves the efficiency of powder selection and reduces the screening pressure. The screen passes through a polyurethane or stainless steel screen to prevent hole blockage and improve screening efficiency. The screen tensioner is used to tension the screen, which facilitates the disassembly and assembly of the screen, making the screen replacement convenient and time-saving. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] Figure 1 This is a schematic diagram of the high-frequency vibrating screen structure of the utility model;
[0017] Figure 2 It is a schematic diagram of the exciting beam of the utility model;
[0018] Figure 3 This is a schematic diagram of the screen tensioning structure of the utility model;
[0019] Figure 4 This is a schematic diagram of the screen adjustment structure of the utility model;
[0020] Figure 5 This is a schematic diagram of the high-frequency vibration principle of the utility model;
[0021] Figure 6 This is a schematic diagram of the internal screen structure distribution of the high-frequency screen of the utility model.
[0022] In the figure: 1. feed inlet; 2. exciting beam; 3. screen box cover; 4. screen hook pulling beam; 5. cross beam; 6. screen tensioning structure; 7. screen box; 8. screen under-screen hopper; 9. inspection door; 10. fine particle discharge port; 11. shock absorber; 12. coarse particle discharge port; 21. shear spring; 22. circular main beam; 23. exciting strip; 24. rib plate; 25. exciting motor; 26. protective plate; 61. screen tensioning beam; 62. screen drag; 63. screen; 65. protective rubber; 641. tensioner; 642. wire rope; 643. pulling arm; 644. tension spring. DETAILED DESCRIPTION
[0023] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0024] like Figure 1-Figure 6 As shown, the utility model provides a technical solution: a high-frequency vibration grading screen, comprising a screen box 7, a feed port 1 is provided at the top of the screen box 7, and a screen hopper 8 is installed at the bottom of the screen box 7, a fine particle discharge port 10 is provided at the bottom of the screen hopper 8, a screen box cover 3 is installed on the outside of one end of the screen box 7, a crossbeam 5 is installed at the bottom of the screen box cover 3, an exciting beam 2 is installed between the inner sides of the screen box 7, a screen 63 is provided at the top of the exciting beam 2, and the screen 63 is tensioned by a screen tensioning structure 6;
[0025] The screen box 7 is in an inclined state and can be configured accordingly according to the different screened raw materials and the size of the raw materials. Both sides of the exciting beam 2 are connected to the screen box 7 through shear springs 21.
[0026] A screen hook pulling beam 4 is installed on the inner wall of the screen box 7 , and a screen tensioning structure 6 is movably installed in the screen hook pulling beam 4 . The screen tensioning structure 6 is used to tension the screen 63 .
[0027] A circular main beam 22 is installed between the inner sides of the exciting beam 2. The circular main beam 22 is connected to the inner sides of the exciting beam 2 through a rib plate 24. A beating strip 23 is installed at the top of the exciting beam 2. The beating strip 23 is made of rubber.
[0028] A protection plate 26 is installed at the bottom end of the exciting beam 2 , and an exciting motor 25 is installed at the bottom end of the protection plate 26 .
[0029] The screen tensioning structure 6 comprises a screen tensioning beam 61 connected to the screen hook pulling beam 4 , the screen tensioning beam 61 is connected to the screen 63 , and a screen drag 62 is installed at the bottom end of the screen 63 , and the screen drag 62 is connected to the screen box 7 .
[0030] A protective rubber 65 is provided at the top of the screen tensioning structure 6, and an adjustment structure is provided between the screen tensioning structures 6, the adjustment structure includes a tensioner 641 installed on the inner side of the screen box 7, a steel wire rope 642 is installed between the tensioners 641 through a tension spring 644, and a pulling arm 643 is installed at one end of the tensioner 641.
[0031] The bottom of the screen box 7 is provided with a coarse particle discharge port 12 and a shock absorber 11, and an inspection door 9 is hingedly mounted on the outer side of one end of the under-screen hopper 8.
[0032] The entire screen box 7 has an inclination angle of 35-45 degrees, and can be configured accordingly according to the different screening materials and the size of the raw materials. The number of the top screen 63 excitation beams of the first layer of screen 63 is 3-5 groups, and the number of other screen 63 excitation beams is 2-3 groups. The screens can be arranged in 1-4 layers up and down, and increasing the number of layers can increase the number of screening levels. Each layer of screens can be set with 2-5 pieces, and increasing the screen can improve the screening accuracy. The screen width can be set to 1.5-2.5 meters, and increasing the screen width can increase the output
[0033] It should be noted that the entire screen box 7 has an inclination angle of 35-45 degrees. The screening inclination angle is large and the flow rate is fast. When the material volume at the top feed port 1 is large, the material at the feed port 1 can be strongly broken up and evenly distributed inside, thereby increasing the screening rate of the screen 63 and reducing the processing burden of the next-level screen 63. A 3000-4500r / min exciting motor 25 is installed in the lower middle part of each group of exciting beams. The cable is protected by a hydraulic hose set with a steel wire layer and connected to the side wall of the screen box 7 along the bottom of the exciting beam 2. Rubber shear springs 21 are used on both sides of the exciting beam 2 to connect to the screen box 7. The side plates are connected, and the vibration source has a large vibration force, generally in the range of 5.0-20G's, and the amplitude is in the range of 0.5-25mm, so that fine materials can easily approach the screen 63, increasing the chance of fine material separation and improving screening efficiency. According to the different screening materials, the material, number of layers and number of sheets per layer can be selected. High-frequency vibration makes coarse particles bounce farther and fine particles bounce closer, thereby increasing the screening opportunities for fine materials, and then realizing the stratification of materials and improving the screening rate. When materials close to the size of the sieve holes are stuck on the screen 63 due to high-frequency vibration, It will be bounced up in time, thereby reducing the probability of blockage of the screen 63, increasing the screening rate and the output. The screen box 7 does not move the screen 63, and the exciting motor 25 only vibrates the screen 63. No additional energy is needed to vibrate the screen box 7, saving energy and reducing the cost of steel structure support. The high-strength rubber shear spring 21 withstands the high-frequency vibration force of the exciting motor 25, so that the screen 63 can achieve a smaller amplitude and high-frequency vibration to achieve a better screening effect. The exciting motor 25 is used instead of the hydraulic vibration source, without adding additional hydraulic and cooling systems, reducing equipment noise and reducing maintenance In order to reduce the rate and maintenance difficulty, the main beam of the vibration beam 2 is made of square tube, round tube or rectangular tube, 3-10 ribs 24 are welded on the length direction of the tube, and screen support strips with a spacing of 200-400mm are welded on the outside of the ribs 24. The support strips are inlaid with rubber beating strips 23. The beating strips 23 support the screen 63 for vibration, which reduces the weight of the vibration beam 2 and the motor load. The motor excitation force remains unchanged, thereby increasing the force of hitting the material and increasing the rigidity of the vibration beam 2 to ensure high-load continuous operation. The beating strips 23 are reasonably arranged to improve the vibration effect of the screen 63.
[0034] In summary, the high-frequency vibration grading screen has high screening accuracy and high efficiency, and is suitable for screening and filtering materials less than 35mm and powder materials. It combines vibration conveying and dispersion technology, sorting technology and high-frequency vibration screening structure, and is fully enclosed, dust does not fly, the mesh is not blocked, and the screening can be up to 40 meshes. The fine material screening inclination is large, the flow rate is fast, and the output is high. The screen box 7 does not move and the screen 63 moves. The ground basically does not bear the load. The screening machine can work normally when installed on a solid ground or a steel structure platform. The high-frequency vibration screen 63 adopts polyurethane, high-manganese screen or stainless steel screen to prevent blocking holes and improve screening efficiency. The screen 63 has high wear resistance and is not easy to be blocked. It adopts advanced high-frequency screening principles. The coarse material bounces higher, the fine material is closer to the screen 63, the screening is more accurate, the energy consumption is low, the noise is low, and it meets the national environmental noise standards. The tensioner 641 is used to tension the screen 63, and the screen 63 can be easily removed by one click, saving replacement time and increasing equipment utilization.
[0035] It should be noted that the material first falls onto the top multi-vibrator, and the vibration motor begins to vibrate at a high frequency and a small amplitude. This is the first vibration source that the material contacts, so the material here belongs to the most working conditions, and more vibration sources are needed to vibrate the material at a high frequency. With the increase in the number of layers and the number of sheets per layer, the vibration sources can be reduced appropriately. After the material contacts the screen 63, it begins to stratify. After a large amount of broken and mixed materials of different particle sizes and coarse and fine particles enter the screen surface, only the particles at the bottom of the material contact the screen surface. Due to the high-frequency vibration of the screen 63, the material layer on the screen is loosened, so that the gaps that already exist in the large particles are further enlarged, and the small particles take the opportunity to pass through the gaps. Since the gaps between the small particles are small, the large particles cannot pass through. As a result, the originally disorderly arranged particle group was stratified, that is, it was stratified according to the particle size, forming an arrangement rule in which small particles are at the bottom and coarse particles are at the top. At the same time, large particle materials vibrate farther, and small particle materials are closer to the screen 63. The high-frequency vibration increases the chance of small particle materials contacting the screen 63, and the material flows toward the lower-level vibrator along the large-angle screen 63. The fine particles reaching the screen surface, those smaller than the screen holes pass through the screen, and those larger than the screen holes remain on the screen, finally realizing the separation of coarse and fine particles. Finally, the large particle materials are discharged through the coarse particle discharge port 12, and the small particle materials are screened by the lower screen 63, and then discharged through the fine particle discharge port 10, completing the material grading and the screening process.
[0036] like Figure 5 As shown, stratification generally occurs at the drop and vibration position between point A and point B; more material is separated from point B to point C, and less screening and particle passing occurs from point C to point D.
[0037] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is limited by the attached embodiments and their equivalents.
Claims
1. A high-frequency vibration grading screen, characterized in that: The invention comprises a screen box (7), wherein a feed port (1) is provided at the top of the screen box (7), a screen hopper (8) is installed at the bottom of the screen box (7), a fine particle discharge port (10) is provided at the bottom of the screen hopper (8), a screen box cover (3) is installed at the outer side of one end of the screen box (7), a crossbeam (5) is installed at the bottom of the screen box cover (3), an exciting beam (2) is installed between the inner sides of the screen box (7), a screen (63) is provided at the top of the exciting beam (2), and the screen (63) is tensioned by a screen tensioning structure (6); The screen box (7) is in an inclined state and can be configured accordingly according to the different screened raw materials and the size of the raw materials. Both sides of the exciting beam (2) are connected to the screen box (7) through shear springs (21).
2. A high-frequency vibration grading screen according to claim 1, characterized in that: A screen hook pull beam (4) is installed on the inner wall of the screen box (7), and a screen tensioning structure (6) is movably installed in the screen hook pull beam (4), and the screen tensioning structure (6) is used to tension the screen (63).
3. A high-frequency vibration grading screen according to claim 1, characterized in that: A circular main beam (22) is installed between the inner sides of the exciting beams (2), the circular main beam (22) is connected to the inner sides of the exciting beams (2) via rib plates (24), and a beating strip (23) is installed at the top end of the exciting beams (2), the beating strip (23) being made of rubber.
4. A high-frequency vibration grading screen according to claim 1, characterized in that: A protective plate (26) is installed at the bottom end of the excitation beam (2), and an excitation motor (25) is installed at the bottom end of the protective plate (26).
5. A high-frequency vibration grading screen according to claim 1, characterized in that: The screen tensioning structure (6) comprises a screen tensioning beam (61) connected to the screen hook tensioning beam (4), the screen tensioning beam (61) is connected to the screen (63), and a screen drag (62) is installed at the bottom end of the screen (63), and the screen drag (62) is connected to the screen box (7).
6. A high-frequency vibration grading screen according to claim 1, characterized in that: A protective rubber (65) is provided at the top of the screen tensioning structure (6), and an adjustment structure is provided between the screen tensioning structures (6), the adjustment structure comprises a tensioner (641) installed on the inner side of the screen box (7), a steel wire rope (642) is installed between the tensioners (641) via a tension spring (644), and a pulling arm (643) is installed at one end of the tensioner (641).
7. A high-frequency vibration grading screen according to claim 1, characterized in that: The bottom end of the screen box (7) is provided with a coarse particle discharge port (12) and a shock absorber (11), and an inspection door (9) is hingedly mounted on the outer side of one end of the under-screen hopper (8).
8. The high-frequency vibration grading screen according to claim 1, characterized in that: The entire screen box (7) has an inclination angle of 35-45 degrees, and can be configured accordingly according to the different screening materials and the size of the raw materials. The number of exciting beams of the top screen (63) of the first screen (63) is 3-5 groups, and the number of exciting beams of other screens (63) is 2-3 groups. The screens can be arranged in 1-4 layers up and down, and increasing the number of layers can increase the number of screening stages; each layer of screens can be provided with 2-5 pieces, and increasing the screens can improve the screening accuracy; the screen width can be set to 1.5-2.5 meters, and increasing the screen width can increase the output.