A vibrating screen with noise reduction function

Abstract

The utility model discloses a vibration screen with noise reduction function, which relates to the technical field of vibration screens, including a base and a screen body; a soundproof cover is fixedly provided on the base; a feed port is provided at the upper end of the soundproof cover, and a cover plate is provided on the feed port; a screen plate is fixedly provided inside the screen body, a discharge bin is provided below the screen plate, and a discharge port is provided below the discharge bin; a chassis is provided below the discharge port; a spring assembly is provided between the screen body and the chassis; and vibration motors are fixedly provided at both ends of the screen body. The utility model opens the feed port to put the material in, and the material falls onto the screen plate in the screen body, and then starts the vibration motor, which drives the screen body to vibrate up and down, thereby screening the material; when noise is generated, the noise is blocked by the soundproof cover to reduce the generation of noise; during the operation of the vibration motor, more heat is generated to increase the temperature of the vibration screen, and the temperature in the screening machine can be absorbed by the soundproof cover to ensure the normal operation of the vibration motor.

Description

Technical Field

[0001] The utility model relates to the technical field of vibrating screens, in particular to a vibrating screen with a noise reduction function. Background Art

[0002] After the rotary vibrating screen is started, its power device, i.e. the eccentric blocks at different phases at the upper and lower ends of the vibration motor, generates a compound inertial force due to the high-speed placement. This inertial force forces the vibrating body of the screen machine to perform compound rotational motion. The screen frame continuously reciprocates under the action of the vibration force, thereby driving the screen surface to perform periodic vibration, so that the material on the screen surface moves in a directional and active manner with the screen box. During this period, materials smaller than the surface diameter of the screen hole fall through the screen hole to the lower layer and become screened materials. Materials larger than the surface diameter of the screen hole are discharged from the discharge port after continuous jumping motion, completing the screening work. In actual use, by adjusting the relative phases of the eccentric blocks at the upper and lower ends of the vibration motor, the movement trajectory of the material on the screen surface can be changed, thereby achieving different screening operation purposes.

[0003] When the vibrating screen is in operation, the interaction between the material and the screen will generate vibration, which will in turn generate significant noise and vibration. For employees who work in a noisy environment for a long time, their health may be seriously affected.

[0004] In the prior art, a Chinese patent with a publication number of CN219850708U is proposed to solve the above-mentioned technical problems. The technical solution disclosed in the patent document is as follows: it includes a supporting base, a distribution box is arranged at the bottom position of the supporting base, and a vibrating screen body is arranged at the upper end of the supporting base; it also includes: a soundproof glass cover, which is installed at the external position of the vibrating screen body, and four assembly plugs are arranged at the bottom position of the soundproof glass cover, the assembly plugs and the soundproof glass cover are integrally formed, and a connecting jack is arranged at the connecting position of the assembly plug and the supporting base, and the connecting jack is integrally formed with the supporting base; a discharge guide seat, which is arranged on the outer walls of both sides of the vibrating screen body, and a material receiving trough is arranged directly below the discharge guide seat, and the material receiving trough is integrally formed with the supporting base; but the vibrating machine is covered by the cover shell, and the motor of the vibrating machine will generate more heat when it works, and the rising temperature of the vibrating machine makes the motor vulnerable to damage, which needs to be improved. Utility Model Content

[0005] The purpose of the utility model is to provide a vibrating screen with noise reduction function to solve the problems raised in the above background technology.

[0006] In order to solve the above technical problems, the technical solution adopted by the utility model is:

[0007] A vibration screen with noise reduction function comprises a base and a screen body; a soundproof cover is fixedly provided on the base, the soundproof cover is used to isolate the noise generated when the vibration screen is working and reduce the temperature of the vibration screen; a feed port is provided at the upper end of the soundproof cover, the feed port is communicated with the inside of the screen body, a cover plate is provided on the feed port, and the cover plate is hinged to the feed port; a screen plate is fixedly provided inside the screen body, a discharge bin is provided below the screen plate, and a discharge port is provided below the discharge bin; a chassis is provided below the discharge port, and the chassis is slidably connected to the base; a spring assembly is provided between the screen body and the chassis, and the spring assembly is fixedly connected to the screen body and the chassis; vibration motors are fixedly provided at both ends of the screen body.

[0008] When the vibrating screen is screening, it is opened and the material is put in from the feed port. The material falls onto the screen plate inside the screen body, and then the vibration motor is started. The vibration motor drives the screen body to vibrate up and down, thereby screening the material, and the screened material passes through the discharge port to the chassis; when noise is generated, the noise is blocked by the sound insulation cover to reduce the generation of noise; the vibration motor will generate more heat during operation, which will increase the temperature of the vibrating screen. The sound insulation cover can also absorb the temperature inside the screening machine to ensure the normal operation of the vibration motor.

[0009] A further improvement of the technical solution of the utility model is that the sound insulation cover includes a cover shell and a sound absorbing layer, a cavity is formed between the cover shell and the sound absorbing layer, silicone oil is arranged in the cavity, a heat exchanger is arranged on one side of the cover shell, the heat exchanger is used to cool the silicone oil, and the heat exchanger is communicated with the cavity; the sound absorbing layer is a sponge board.

[0010] The above technical solution is adopted, in which the surface shape of the sponge is not flat, but is composed of a series of uneven small holes or small protrusions. This irregular surface can cause sound waves to refract and scatter multiple times when reflected, so that the sound waves can propagate and dissipate multiple times inside the material, reducing the reflection and echo of the sound. Silicone oil has the characteristics of sound absorption and sound insulation; when the structure vibrates, the silicone oil will be affected by the vibration force, thereby generating internal friction and flow. This process consumes vibration energy and converts it into microscopic movement inside the liquid, thereby reducing the energy of structural vibration. It can reduce the propagation and reflection of sound waves, thereby reducing the sound propagation effect. In addition, silicone oil usually has a high heat capacity and thermal conductivity, which can absorb the heat generated by the vibration motor when it is working, and then cool the silicone oil through the heat exchanger, thereby ensuring the normal operation of the vibrating screen and reducing noise.

[0011] A further improvement of the technical solution of the utility model is that a layer of polyurethane plate is fixedly provided on the surface of the sieve plate and the discharge bin.

[0012] In the above technical solution, the material will collide with the screen surface during movement and falling on the screen surface, generating noise. The vibrating screen mostly uses steel screen plates, which generate relatively large noise. The polyurethane plate has a small elastic modulus and low impact noise. By fixing a layer of polyurethane plate on the surface of the screen plate and the discharge bin, the high-frequency vibration of the screen plate can be effectively reduced, and the impact force of the material on the screen plate can be buffered, thereby reducing the noise of the vibrating screen.

[0013] A further improvement of the technical solution of the utility model is that: the spring assembly includes a fixed block and an abutment block, the fixed block is fixedly connected to the screen body, and the abutment block is fixedly connected to the chassis; a vibration spring is sleeved on the abutment block and the fixed block, a pipe sleeve is sleeved on the outer side of the vibration spring, and the pipe sleeve is fixedly connected to the chassis; a rubber pad is fixedly provided on the abutment block.

[0014] The above technical solution is adopted. In this solution, when the vibration motor vibrates, the vibration spring causes the screen body to vibrate back and forth, thereby driving the vibration screen to vibrate and then driving the screen plate to screen the material; by setting an abutment block and a fixed block to fix the position of the spring and control the degree of contraction of the spring, when the vibration degree is too large, the fixed block will touch the abutment block to consume excess vibration through impact to stabilize the vibration, but the collision between the fixed block and the abutment block will also generate noise. By setting a rubber pad, when the fixed block collides with the abutment block, it can be deformed to reduce noise.

[0015] The further improvement of the technical solution of the utility model is that lubricating oil is arranged in the pipe sleeve; and the pipe sleeve is slidably connected with the fixed block.

[0016] The above technical solution is adopted, in which a sleeve and lubricating oil are provided, and the spring is immersed in the lubricating oil, so that the contact area between the spring and the sleeve is reduced, thereby reducing the friction between the oil seal and the shaft, reducing the generation of noise, and reducing the vibration and noise generated by the spring.

[0017] A further improvement of the technical solution of the utility model is that a shock absorbing groove is provided between the chassis and the base; and liquid rubber is provided in the shock absorbing groove.

[0018] The above technical solution is adopted. In this solution, the liquid rubber is a polymer material with high viscosity and fluidity, which is suitable for liquid damping. When the screen body vibrates, the vibration will be transmitted to the liquid rubber through the chassis. The liquid rubber will be affected by the vibration force, thereby generating internal friction and flow. This process consumes the vibration energy and converts it into microscopic motion inside the liquid rubber, thereby reducing the energy of structural vibration, making the chassis stable and reducing the vibration noise of the body.

[0019] A further improvement of the technical solution of the utility model is that a shock absorbing seat is fixedly provided under the base.

[0020] The above technical solution is adopted. The core function of the vibration isolator in this solution is to reduce vibration transmission. When the equipment is subjected to external excitation, the vibration energy can be absorbed and dispersed, thereby reducing the vibration and acceleration of the equipment. In addition, the shock-absorbing seat separates the ground from the vibrating screen, which can protect the equipment from external impact and vibration, reduce equipment damage and failure rate, and extend the service life of the equipment.

[0021] Due to the adoption of the above technical solution, the utility model has achieved the following technical progress compared with the prior art:

[0022] 1. The utility model provides a vibration screen with noise reduction function. When the vibration screen is screening, the material is put in from the feed port, and the material falls onto the screen plate in the screen body. Then the vibration motor is started, and the vibration motor drives the screen body to vibrate up and down, so as to screen the material. The screened material passes through the discharge port to the bottom plate; when noise is generated, the noise is blocked by the sound insulation cover to reduce the noise generation; the vibration motor generates more heat during the operation of the vibration screen, which increases the temperature of the vibration screen. The sound insulation cover can also absorb the temperature in the screening machine to ensure the normal operation of the vibration motor.

[0023] 2. The utility model provides a vibration screen with noise reduction function. By setting a pipe sleeve and lubricating oil, the spring is immersed in the lubricating oil, so that the contact area between the spring and the pipe sleeve is reduced, thereby reducing the friction between the oil seal and the shaft, reducing the generation of noise, and reducing the vibration and noise generated by the spring.

[0024] 3. The utility model provides a vibration screen with noise reduction function. By setting liquid rubber, when the screen body vibrates, the vibration will be transmitted to the liquid rubber through the chassis. The liquid rubber will be affected by the vibration force, thereby generating internal friction and flow. This process consumes vibration energy and converts it into microscopic motion inside the liquid rubber, thereby reducing the energy of structural vibration, keeping the chassis stable, and reducing the vibration noise of the machine body. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The utility model will be further described below in conjunction with the accompanying drawings.

[0026] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0027] Figure 2 It is a schematic diagram of the internal structure of the utility model;

[0028] Figure 3 It is a schematic diagram of the internal cross-sectional structure of the utility model;

[0029] Figure 4 It is a schematic diagram of the overall cross-sectional structure of the utility model;

[0030] Figure 5 This is a schematic cross-sectional structural diagram of a spring assembly of the utility model;

[0031] In the figure: 1. base; 2. sieve body; 3. sound insulation cover; 4. feed port; 5. cover plate; 6. discharge bin; 7. discharge port; 8. chassis; 9. spring assembly; 10. vibration motor; 11. cover shell; 12. sound absorbing layer; 13. cavity; 14. fixing block; 15. abutment block; 16. vibration spring; 17. pipe sleeve; 18. rubber pad; 19. shock absorbing groove; 20. shock absorbing seat; 21. sieve plate; 22. heat exchanger. DETAILED DESCRIPTION

[0032] The present invention is further described in detail below in conjunction with the embodiments:

[0033] Example 1

[0034] like Figure 1-5 As shown, the utility model provides a vibration screen with noise reduction function, including a base 1 and a screen body 2; a soundproof cover 3 is fixedly provided on the base 1, and the soundproof cover 3 is used to isolate the noise generated when the vibration screen is working and reduce the temperature of the vibration screen; a feed port 4 is provided at the upper end of the soundproof cover 3, and the feed port 4 is communicated with the inside of the screen body 2, and a cover plate 5 is provided on the feed port 4, and the cover plate 5 is hinged to the feed port 4; a sieve plate 21 is fixedly provided inside the screen body 2, a discharge bin 6 is provided below the sieve plate 21, and a discharge port 7 is provided below the discharge bin 6; a chassis 8 is provided below the discharge port 7, and the chassis 8 is slidably connected to the base 1; a spring assembly 9 is provided between the screen body 2 and the chassis 8, and the spring assembly 9 is fixedly connected to the screen body 2 and the chassis 8; a vibration motor 10 is fixedly provided at both ends of the screen body 2.

[0035] In this embodiment, when the vibrating screen is screening, the material is opened and put in from the feed port 4, and the material falls onto the screen plate 21 in the screen body 2. Then the vibration motor 10 is started, and the vibration motor 10 drives the screen body 2 to vibrate up and down, so as to screen the material. The screened material passes through the discharge port 7 to the chassis 8; when noise is generated, the noise is blocked by the sound insulation cover 3 to reduce the generation of noise; during the operation of the vibration motor 10, more heat is generated, which increases the temperature of the vibrating screen. The sound insulation cover 3 can also absorb the temperature in the screening machine to ensure the normal operation of the vibration motor 10.

[0036] In this embodiment, preferably, the sound insulation cover 3 includes a cover shell 11 and a sound absorbing layer 12, a cavity 13 is formed between the cover shell 11 and the sound absorbing layer 12, silicone oil is arranged in the cavity 13, a heat exchanger 22 is arranged on one side of the cover shell 11, the heat exchanger 22 is used to cool the silicone oil, and the heat exchanger 22 is communicated with the cavity 13; the sound absorbing layer 12 is a sponge board.

[0037] The surface shape of the sponge is not flat, but is composed of a series of uneven small holes or small protrusions. This irregular surface can cause sound waves to refract and scatter multiple times when reflected, so that the sound waves can propagate and dissipate multiple times inside the material, reducing the reflection and echo of the sound. Silicone oil has the characteristics of sound absorption and sound insulation; when the structure vibrates, the silicone oil will be affected by the vibration force, thereby generating internal friction and flow. This process consumes vibration energy and converts it into microscopic motion inside the liquid, thereby reducing the energy of structural vibration. It can reduce the propagation and reflection of sound waves, thereby reducing the sound propagation effect. In addition, silicone oil usually has a high heat capacity and thermal conductivity, which can absorb the heat generated by the vibration motor 10 when it is working, and then cool the silicone oil through the heat exchanger 22, thereby ensuring the normal operation of the vibrating screen and reducing noise.

[0038] Preferably, a layer of polyurethane plate is fixedly provided on the surface of the sieve plate 21 and the discharge bin 6 .

[0039] When materials move on the screen surface and fall, they collide with the screen surface and generate noise. Most vibrating screens use steel screen plates 21, which generate relatively loud noise. The polyurethane plate has a small elastic modulus and low impact noise. By fixing a layer of polyurethane plate on the surface of the screen plate 21 and the discharge bin 6, the high-frequency vibration of the screen plate 21 can be effectively reduced, and the impact force of the material on the screen plate 21 can be buffered, thereby reducing the noise of the vibrating screen.

[0040] Example 2

[0041] like Figure 1-5 As shown, on the basis of Example 1, the utility model provides a technical solution: preferably, the spring assembly 9 includes a fixed block 14 and an abutment block 15, the fixed block 14 is fixedly connected to the screen body 2, and the abutment block 15 is fixedly connected to the chassis 8; a vibration spring 16 is sleeved on the abutment block 15 and the fixed block 14, a pipe sleeve 17 is sleeved on the outer side of the vibration spring 16, and the pipe sleeve 17 is fixedly connected to the chassis 8; a rubber pad 18 is fixedly provided on the abutment block 15.

[0042] In this embodiment, when the vibration motor 10 vibrates, the vibration spring 16 causes the screen body 2 to vibrate back and forth, thereby driving the vibration screen to vibrate and then driving the screen plate 21 to screen the material; by setting the abutment block 15 and the fixed block 14 to fix the position of the spring and control the degree of contraction of the spring, when the vibration degree is too large, the fixed block 14 will touch the abutment block 15 to consume the excess vibration through collision to stabilize the vibration, but the collision between the fixed block 14 and the abutment block 15 will also generate noise. By setting the rubber pad 18, when the fixed block 14 collides with the abutment block 15, it can be deformed to reduce the noise.

[0043] Lubricating oil is provided in the pipe sleeve 17 ; the pipe sleeve 17 is slidably connected to the fixing block 14 .

[0044] By providing the sleeve 17 and the lubricating oil, the spring is immersed in the lubricating oil, so that the contact area between the spring and the sleeve 17 is reduced, thereby reducing the friction between the oil seal and the shaft, reducing the generation of noise, and reducing the vibration and noise generated by the spring.

[0045] Example 3

[0046] like Figure 1-5 As shown, based on Example 1, the utility model provides a technical solution: preferably, a shock absorbing groove 19 is provided between the chassis 8 and the base 1; and liquid rubber is provided in the shock absorbing groove 19.

[0047] In this embodiment, liquid rubber is a polymer material with high viscosity and fluidity, and is suitable for liquid damping. When the sieve body 2 vibrates, the vibration is transmitted to the liquid rubber through the chassis 8, and the liquid rubber is affected by the vibration force, thereby generating internal friction and flow. This process consumes vibration energy and converts it into microscopic motion inside the liquid rubber, thereby reducing the energy of structural vibration, so that the chassis 8 remains stable and reduces the vibration noise of the body.

[0048] Example 4

[0049] like Figure 1-5 As shown, based on Example 1, the utility model provides a technical solution: preferably, a shock absorbing seat 20 is fixedly provided under the base 1.

[0050] In this embodiment, the core function of the vibration isolator is to reduce vibration transmission. When the equipment is subjected to external excitation, the vibration energy can be absorbed and dispersed, thereby reducing the vibration and acceleration of the equipment. In addition, the shock-absorbing seat 20 separates the ground from the vibrating screen, which can protect the equipment from external impact and vibration, reduce the damage and failure rate of the equipment, and extend the service life of the equipment.

[0051] The following is a detailed description of the working principle of the vibrating screen with noise reduction function.

[0052] like Figure 1-5As shown, when the vibrating screen is screening, the material is opened and put in from the feed port 4, and the material falls onto the screen plate 21 in the screen body 2, and then the vibration motor 10 is started, and the vibration motor 10 drives the screen body 2 to vibrate up and down, so as to screen the material, and the screened material passes through the discharge port 7 to the chassis 8; when noise is generated, the sound insulation layer is a sponge, and the sound waves can propagate and dissipate multiple times inside the material, reducing the reflection and echo of the sound; silicone oil has the characteristics of sound absorption and sound insulation; when the structure vibrates, the silicone oil will be affected by the vibration force, thereby generating internal friction and flow, further reducing the sound propagation effect, in addition, silicone oil usually has a higher heat capacity and thermal conductivity, which can absorb the heat generated by the vibration motor 10 when it is working, and then the silicone oil is cooled by the heat exchanger 22, so as to ensure the normal operation of the vibrating screen; when the screen body 2 vibrates violently, the vibration will be transmitted to the liquid rubber through the chassis 8, and the chassis 8 is kept stable by the damping effect of the liquid rubber.

[0053] The above generally describes the present invention in detail, but it is obvious to a person skilled in the art that some modifications or improvements can be made to the present invention. Therefore, modifications or improvements that do not deviate from the spirit of the present invention are within the scope of protection of the present invention.

Claims

1. A vibrating screen with noise reduction function, comprising a base (1) and a screen body (2); characterized in that: A soundproof cover (3) is fixedly provided on the base (1), and the soundproof cover (3) is used to isolate the noise generated when the vibrating screen is working and reduce the temperature of the vibrating screen; a feed port (4) is provided at the upper end of the soundproof cover (3), and the feed port (4) is communicated with the inside of the screen body (2); a cover plate (5) is provided on the feed port (4), and the cover plate (5) is hinged to the feed port (4); a screen plate (21) is fixedly provided inside the screen body (2), a discharge bin (6) is provided below the screen plate (21), and a discharge port (7) is provided below the discharge bin (6); a chassis (8) is provided below the discharge port (7), and the chassis (8) is slidably connected to the base (1); a spring assembly (9) is provided between the screen body (2) and the chassis (8), and the spring assembly (9) is fixedly connected to the screen body (2) and the chassis (8); and a vibration motor (10) is fixedly provided at both ends of the screen body (2).

2. The vibration screen with noise reduction function according to claim 1, characterized in that: The soundproof cover (3) comprises a cover shell (11) and a sound absorbing layer (12); a cavity (13) is formed between the cover shell (11) and the sound absorbing layer (12); silicone oil is arranged in the cavity (13); a heat exchanger (22) is arranged on one side of the cover shell (11); the heat exchanger (22) is used to cool the silicone oil; the heat exchanger (22) is communicated with the cavity (13); and the sound absorbing layer (12) is a sponge board.

3. The vibration screen with noise reduction function according to claim 2, characterized in that: A layer of polyurethane plate is fixedly provided on the surface of the sieve plate (21) and the discharge bin (6).

4. The vibration screen with noise reduction function according to claim 3, characterized in that: The spring assembly (9) comprises a fixed block (14) and an abutment block (15); the fixed block (14) is fixedly connected to the screen body (2); the abutment block (15) is fixedly connected to the chassis (8); a vibration spring (16) is sleeved on the abutment block (15) and the fixed block (14); a pipe sleeve (17) is sleeved on the outer side of the vibration spring (16); the pipe sleeve (17) is fixedly connected to the chassis (8); a rubber pad (18) is fixedly provided on the abutment block (15).

5. The vibration screen with noise reduction function according to claim 4, characterized in that: Lubricating oil is provided in the pipe sleeve (17); the pipe sleeve (17) is fixedly connected to the fixing block (14).

6. The vibration screen with noise reduction function according to claim 5, characterized in that: A shock absorbing groove (19) is provided between the chassis (8) and the base (1); liquid rubber is provided in the shock absorbing groove (19).

7. The vibration screen with noise reduction function according to claim 6, characterized in that: A shock absorbing seat (20) is fixedly provided below the base (1).

Images