Fine screening modular optical fiber vibration detection device

Abstract

The utility model discloses a fine screening modularized optical fiber vibration detection device, which comprises a vibrating screen, a plurality of vibration motors are fixedly connected to the vertical outer wall of the vibrating screen, a plurality of elastic modules are fixedly connected to the bottom of the vibrating screen, and the lower ends of the plurality of elastic modules are fixedly connected with the same base. The optical fiber sensing technology is adopted, the interference characteristic of light is utilized, high-precision detection of the vibration state of materials is achieved, the defect that a traditional mechanical or electronic sensing module is prone to being interfered is overcome, and a special optical fiber sensing structure is designed in combination with the characteristics of a vibrating screen. The high sensitivity and high resolution of the optical fiber vibration sensor enable the system to accurately detect the vibration state of the material, the accuracy and reliability of vibration detection are improved, and as the optical fiber vibration sensing module has the characteristic of non-contact detection, the direct contact and abrasion with the material are reduced, and the maintenance cost of equipment is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to vibration sieve vibration detection technical field, concretely is a kind of fine screening modular optical fiber vibration detection device. BACKGROUND

[0002] Vibration sieve is a commonly used industrial screening equipment, is widely used in material screening, grading and washing process in mining, metallurgy, building materials, chemical industry and other industries.Vibration sieve is usually composed of screen, vibration motor, damping spring and other parts, and its working principle is to realize the screening of material by the vibration of screen.In the use process of vibration sieve, its vibration signal needs to be monitored and controlled to ensure normal work and screening effect.

[0003] The traditional vibration signal monitoring method mainly uses acceleration sensor, but acceleration sensor has the problems of low sensitivity and easy to be disturbed when detecting vibration, which leads to low accuracy of vibration detection result, so that whether vibration sieve is running normally cannot be accurately judged by detecting structure. UTILITY MODEL CONTENT

[0004] The utility model aims at providing a kind of fine screening modular optical fiber vibration detection device to solve the problems raised in the above background.

[0005] To achieve the above object, the utility model provides the following technical scheme:

[0006] The utility model provides a kind of fine screening modular optical fiber vibration detection device, including vibration sieve, the vertical outer wall of vibration sieve is fixedly connected with multiple vibration motors, the bottom of vibration sieve is fixedly connected with multiple elastic modules, the lower end of multiple elastic modules is fixedly connected with same base, and vibration detection module is installed on the lower side of vibration sieve;

[0007] The vibration detection module includes mounting piece installed on the bottom of vibration sieve, the mounting piece is fixedly connected with optical fiber vibration sensing module, the input end and the output end of the optical fiber vibration sensing module are fixedly connected with input connector and output connector respectively, the input connector is inserted with light source conveying line, one end of the light source conveying line is fixedly connected with narrowband light source, the output connector is inserted with sensing line, one end of the sensing line is fixedly connected with photoelectric detector, the output end of the photoelectric detector is fixedly communicated with data acquisition card, and the output end of the data acquisition card is fixedly communicated with computer.

[0008] Further, the mounting piece comprises a plurality of mounting studs fixedly connected to the bottom of the vibrating screen, the mounting studs are circumferentially distributed, one of the mounting studs is threadedly sleeved with an internally threaded pipe, the lower end of the internally threaded pipe is fixedly connected with a mounting plate, the sidewall of the upper side of the mounting plate is fixedly connected with a semicircular limiting plate through two bolts, and the fiber vibration sensing module is located between the mounting plate and the semicircular limiting plate.

[0009] Further, the fiber vibration sensing module comprises an armored shell, a first single-mode optical fiber is fixedly connected in the armored shell, a first hollow optical fiber is fused to one end of the first single-mode optical fiber, a second single-mode optical fiber is fused to the end of the first hollow optical fiber away from the first single-mode optical fiber, a second hollow optical fiber is fused to the end of the second single-mode optical fiber away from the first hollow optical fiber, and a third single-mode optical fiber is fused to the end of the second hollow optical fiber away from the second single-mode optical fiber.

[0010] Further, the elastic module comprises a connecting plate fixedly connected to the bottom of the vibrating screen, the sidewall of the lower side of the connecting plate is fixedly connected with a sliding rod, the rod wall of the sliding rod is movably sleeved with a support plate, the support plate is fixedly connected with the base, the rod wall of the sliding rod is movably sleeved with a spring, and the spring is located between the connecting plate and the support plate.

[0011] Further, the base comprises a plurality of support columns fixedly connected to the lower sides of the plurality of support plates, respectively, and the lower ends of the support columns are fixedly connected with the same annular plate.

[0012] Further, the lower end of the sliding rod is fixedly connected with a limiting block.

[0013] Further, the vibrating screen comprises a frame, a screen plate is fixedly connected in the frame, and the vibrating motor is fixedly connected to the frame.

[0014] Further, two reinforcing plates are fixedly connected between the vibrating motor and the frame.

[0015] Compared with the prior art, the utility model has the advantages that:

[0016] The utility model discloses a vibrating detection module is set up, and the high sensitivity and high resolution of fiber vibration sensor make the system can accurately detect the vibration state of material, improve the accuracy and reliability of vibration detection, because the fiber vibration sensing module has the characteristics of non-contact detection, so the direct contact and abrasion with material are reduced, and the maintenance cost of equipment is reduced. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 It is the whole structure schematic diagram of the utility model;

[0018] Figure 2 Another direction structure schematic view of the utility model;

[0019] Figure 3 For Figure 1 The structure schematic view of the optical fiber vibration detection module;

[0020] Figure 4 For Figure 1 The structure schematic view of the optical fiber vibration sensing module;

[0021] Figure 5 For Figure 1 The sectional view of the optical fiber vibration sensing module;

[0022] Figure 6 For Figure 1 The connecting structure schematic view of the mounting stud and the internally threaded pipe;

[0023] Figure 7 For Figure 1 The structure schematic view of the elastic module.

[0024] In the figure: 1, vibration screen; 2, vibration motor; 3, elastic module; 4, base; 5, mounting piece; 6, optical fiber vibration sensing module; 7, input connector; 8, output connector; 9, light source conveying line; 10, narrowband light source; 11, sensing line; 12, photoelectric detector; 13, data acquisition card; 14, computer; 15, mounting stud; 16, internally threaded pipe; 17, mounting plate; 18, semicircular limiting plate; 19, armored shell; 20, first single-mode optical fiber; 21, first hollow optical fiber; 22, second single-mode optical fiber; 23, second hollow optical fiber; 24, third single-mode optical fiber; 25, connecting plate; 26, sliding rod; 27, support plate; 28, spring; 29, support column; 30, annular plate; 31, limiting block; 32, frame; 33, screen plate; 34, reinforcing plate. DETAILED DESCRIPTION

[0025] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the utility model.

[0026] Please refer to Figures 1-7The utility model provides a fine screening modular optical fiber vibration detection device, including vibrating screen 1, vibrating screen 1's vertical outer wall fixedly connected with a plurality of vibrating motor 2, vibrating screen 1's bottom fixedly connected with a plurality of elastic module 3, a plurality of elastic module 3's lower extreme fixedly connected with same base 4, vibrating screen 1's downside is equipped with vibration detection module,

[0027] Vibration detection module includes the mounting piece 5 of vibrating screen 1 bottom, the mounting piece 5 is fixedly connected with optical fiber vibration sensing module 6, the input end and the output end of optical fiber vibration sensing module 6 are fixedly connected with input connector 7 and output connector 8 respectively, the input connector 7 is inserted with light source delivery line 9, one end of light source delivery line 9 is fixedly connected with narrowband light source 10, the output connector 8 is inserted with sensing line 11, one end of sensing line 11 is fixedly connected with photoelectric detector 12, the output end of photoelectric detector 12 is fixedly communicated with data acquisition card 13, the output end of data acquisition card 13 is fixedly communicated with computer 14.

[0028] In the above embodiment, when using, the optical fiber vibration sensing module 6 is installed on the mounting piece 5, the narrowband light source 10 is connected on the optical fiber vibration sensing module 6, the center wavelength of the narrowband light source 10 is set as 1550nm, the temperature is set as 26 DEG C, and the power of the light source is set as 5mW. When the vibrating screen 1 starts, the vibration frequency of the vibrating screen 1 is transmitted to the photoelectric detector 12 through the optical fiber vibration sensing module 6, the photoelectric detector 12 converts the received optical signal into an electrical signal, and then the electrical signal is collected through the data acquisition card 13 and transmitted to the computer 14 for data collection and processing, so that the vibration frequency of the vibrating screen 1 can be detected in real time. The system can accurately detect the vibration state of the material by using the optical fiber sensing technology and the interference characteristics of light, overcoming the shortcomings of traditional mechanical or electronic sensors that are easily disturbed. According to the characteristics of the vibrating screen 1, a special optical fiber sensing structure is designed, and the high sensitivity and high resolution of the optical fiber vibration sensing module 6 enable the system to accurately detect the vibration state of the material, improve the accuracy and reliability of the vibration detection, and reduce the direct contact and wear with the material due to the non-contact detection characteristics of the optical fiber vibration sensing module 6, thereby reducing the maintenance cost of the equipment.

[0029] The mounting piece 5 comprises a plurality of mounting studs 15 fixedly connected to the bottom of the vibrating screen 1, a plurality of the mounting studs 15 are distributed in a circle, wherein a threaded sleeve is arranged on one of the mounting studs 15, the lower end of the inner threaded tube 16 is fixedly connected with a mounting plate 17, the side wall of the upper side of the mounting plate 17 is fixedly connected with a semicircular limiting plate 18 through two bolts, the fiber optic vibration sensing module 6 is located between the mounting plate 17 and the semicircular limiting plate 18, the fiber optic vibration sensing module 6 can be installed at different positions of the vibrating screen 1 by installing the inner threaded tube 16 on different mounting studs 15, so that the vibration of different positions of the vibrating screen 1 can be detected, the vibration characteristics measured by the vibrating screen 1 are analyzed, and the working state and performance of the vibrating screen 1 are evaluated by analyzing the data, which includes judging whether the vibrating screen 1 is unbalanced or has other problems, and evaluating the overall stability and efficiency, which can also avoid errors caused by single-point measurement.

[0030] The fiber optic vibration sensing module 6 comprises an armored shell 19, a first single-mode optical fiber 20 is fixedly connected in the armored shell 19, a first hollow optical fiber 21 is fused to one end of the first single-mode optical fiber 20, a second single-mode optical fiber 22 is fused to the end of the first hollow optical fiber 21 away from the first single-mode optical fiber 20, a second hollow optical fiber 23 is fused to the end of the second single-mode optical fiber 22 away from the first hollow optical fiber 21, and a third single-mode optical fiber 24 is fused to the end of the second hollow optical fiber 23 away from the second single-mode optical fiber 22. First, the fiber core of the first single-mode optical fiber 20 transmits, after entering the first hollow optical fiber 21, a high-order mode in the first hollow optical fiber 21 is excited, the high-order mode is transmitted through the second single-mode optical fiber 22, due to the difference in the refractive index of the cladding and the core, the cladding mode and the fundamental mode will produce an optical path difference in the transmission process, and the different modes with the optical path difference will be coupled and interfered when passing through the second hollow optical fiber 23, and then most of the light will be recoupled into the third single-mode optical fiber 24. Among them, the two hollow optical fibers act as couplers, and the second single-mode optical fiber 22 acts as a sensing arm, and the whole forms a Mach-Zehnder interference structure. Thus, the anti-interference performance and sensitivity of light transmission can be improved, and the accuracy of vibration frequency detection is improved.

[0031] The elastic module 3 comprises a connecting plate 25 fixedly connected to the bottom of the vibrating screen 1, a sliding rod 26 is fixedly connected to the side wall of the lower side of the connecting plate 25, a support plate 27 is movably sleeved on the rod wall of the sliding rod 26, the support plate 27 is fixedly connected with the base 4, a spring 28 is movably sleeved on the rod wall of the sliding rod 26, and the spring 28 is located between the connecting plate 25 and the support plate 27. The spring 28 can improve the amplitude of the vibration of the vibrating screen 1, and improve the screening efficiency.

[0032] The base 4 comprises a plurality of support columns 29 fixedly connected to the lower side of a plurality of support plates 27, and the lower ends of the plurality of support columns 29 are fixedly connected to a same annular plate 30, and the support columns 29 and the annular plate 30 can improve the stability of the device.

[0033] The lower end of the sliding rod 26 is fixedly connected to a limiting block 31, and the limiting block 31 can limit the sliding rod 26 and prevent the sliding rod 26 from being separated from the support plate 27.

[0034] The vibrating screen 1 comprises a frame 32, the frame 32 is fixedly connected with a screen plate 33, and the vibrating motor 2 is fixedly connected to the frame 32, so as to limit the material and prevent the material from being separated from the screen plate 33.

[0035] Two reinforcing plates 34 are symmetrically fixedly connected between the vibrating motor 2 and the frame 32, and the reinforcing plates 34 can improve the stability of the vibrating motor 2.

[0036] Working principle: when in use, the optical fiber vibration sensing module 6 is installed on the mounting piece 5, the narrowband light source 10 is connected on the optical fiber vibration sensing module 6, the center wavelength of the narrowband light source 10 is set to 1550nm, the temperature is set to 26℃, and the power of the light source is set to 5mW. When the vibrating screen 1 starts, the vibration frequency of the vibrating screen 1 is transmitted to the photodetector 12 through the optical fiber vibration sensing module 6, the photodetector 12 converts the received optical signal into an electrical signal, and then collects the electrical signal through the data acquisition card 13 and transmits it to the computer 14 for data collection and processing, so as to realize real-time detection of the vibration frequency of the vibrating screen 1. The optical fiber sensing technology is adopted, the interference characteristics of light are utilized, the high-precision detection of the vibration state of the material is realized, the shortcomings that the traditional mechanical or electronic sensor is easy to be disturbed are overcome, the special optical fiber sensing structure is designed according to the characteristics of the vibrating screen 1, the high sensitivity and high resolution of the optical fiber vibration sensing module 6 enable the system to accurately detect the vibration state of the material, and the accuracy and reliability of the vibration detection are improved. Since the optical fiber vibration sensing module 6 has the characteristics of non-contact detection, the direct contact and wear with the material are reduced, and the maintenance cost of the equipment is reduced.

[0037] It should be noted that, in the present text, the relationship terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between the entities or operations. Moreover, the terms "include", "contain" or any other variants thereof are intended to cover non-exclusive inclusion, so that the process, method, article or equipment including a series of elements not only includes those elements, but also includes other elements not explicitly listed or inherent to such process, method, article or equipment.

[0038] While the embodiments of the present application have been illustrated and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the spirit and scope of the present application, which should be limited only by the appended claims and their equivalents.

Claims

1. A modular fiber optic vibration detection device for fine screening, comprising a vibrating screen (1), characterized in that: Multiple vibration motors (2) are fixedly connected to the vertical outer wall of the vibrating screen (1), multiple elastic modules (3) are fixedly connected to the bottom of the vibrating screen (1), the lower ends of the multiple elastic modules (3) are fixedly connected to the same base (4), and a vibration detection module is installed on the lower side of the vibrating screen (1). The vibration detection module includes a mounting component (5) installed at the bottom of the vibrating screen (1). A fiber optic vibration sensing module (6) is fixedly connected to the mounting component (5). An input connector (7) and an output connector (8) are fixedly connected to the input end and the output end of the fiber optic vibration sensing module (6), respectively. A light source transmission line (9) is inserted into the input connector (7). A narrow-band light source (10) is fixedly connected to one end of the light source transmission line (9). A sensing line (11) is inserted into the output connector (8). A photodetector (12) is fixedly connected to one end of the sensing line (11). A data acquisition card (13) is fixedly connected to the output end of the photodetector (12). A computer (14) is fixedly connected to the output end of the data acquisition card (13).

2. The modular fiber optic vibration detection device for fine screening according to claim 1, characterized in that: The mounting component (5) includes multiple mounting studs (15) fixedly connected to the bottom of the vibrating screen (1). The multiple mounting studs (15) are circumferentially distributed. One of the mounting studs (15) is threaded with an internal thread tube (16). The lower end of the internal thread tube (16) is fixedly connected to a mounting plate (17). The side wall of the upper side of the mounting plate (17) is fixedly connected to a semi-circular limiting plate (18) by two bolts. The fiber optic vibration sensing module (6) is located between the mounting plate (17) and the semi-circular limiting plate (18).

3. The modular fiber optic vibration detection device for fine screening according to claim 2, characterized in that: The fiber optic vibration sensing module (6) includes an armored shell (19), in which a first single-mode fiber (20) is fixedly connected. A first coreless fiber (21) is fused to one end of the first single-mode fiber (20). A second single-mode fiber (22) is fused to the end of the first coreless fiber (21) away from the first single-mode fiber (20). A second coreless fiber (23) is fused to the end of the second single-mode fiber (23) away from the first coreless fiber (21). A third single-mode fiber (24) is fused to the end of the second coreless fiber (23) away from the second single-mode fiber (22).

4. The modular fiber optic vibration detection device for fine screening according to claim 3, characterized in that: The elastic module (3) includes a connecting plate (25) fixedly connected to the bottom of the vibrating screen (1). A sliding rod (26) is fixedly connected to the side wall of the lower side of the connecting plate (25). A support plate (27) is movably sleeved on the wall of the sliding rod (26). The support plate (27) is fixedly connected to the base (4). A spring (28) is movably sleeved on the wall of the sliding rod (26). The spring (28) is located between the connecting plate (25) and the support plate (27).

5. The precision screening modular optical fiber vibration detection device according to claim 4, characterized in that: The base (4) includes multiple support columns (29) that are fixedly connected to the lower side of multiple support plates (27), and the lower ends of the multiple support columns (29) are fixedly connected to the same annular plate (30).

6. The modular fiber optic vibration detection device for fine screening according to claim 5, characterized in that: The lower end of the sliding rod (26) is fixedly connected to a limiting block (31).

7. The modular fiber optic vibration detection device for fine screening according to claim 6, characterized in that: The vibrating screen (1) includes a frame (32), a screen plate (33) is fixedly connected inside the frame (32), and the vibrating motor (2) is fixedly connected to the frame (32).

8. The modular fiber optic vibration detection device for fine screening according to claim 7, characterized in that: The vibration motor (2) and the frame (32) are symmetrically fixedly connected by two reinforcing plates (34).

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