A screen plate falling monitoring and intercepting device and a medium removing screen

Abstract

A screen plate detachment monitoring and interception device and a desliming screen belong to the field of desliming screen technology. The screen plate detachment monitoring and interception device includes an interception filter plate installed inside a screen box, located below the screen plate. Both sides of the interception filter plate are connected to pulley assemblies via steel wire ropes. The pulley assemblies are suspended from the bottom of a crossbeam inside the screen box. The pulley assembly includes a movable pulley with a counterweight mounted on it. A proximity switch for monitoring the position of the movable pulley is installed at the bottom of the crossbeam. When the screen plate detaches, large pieces of material fall onto the interception filter plate, and the medium passes through the interception filter plate and continues to fall, thus intercepting the large pieces of material. Simultaneously, the large pieces of material press the interception filter plate downwards, causing the movable pulley to move upwards. The proximity switch monitors the position of the movable pulley online, thereby achieving online monitoring of screen plate detachment.

Description

Technical Field

[0001] This utility model relates to the field of desliming screen technology, and in particular to a screen plate falling off monitoring and interception device and a desliming screen. Background Technology

[0002] Desliming screens are key equipment used in mining, coal preparation, and other industries for media recovery. Their main function is to separate large materials (such as coal lumps and gangue, typically 300-1500mm in size) from media (such as magnetite powder), enabling media recycling and reducing production costs. Their working principle involves using a vibrating motor or exciter to generate vibration, causing the material to move linearly or circularly on the screen surface. The media and materials are then graded and screened through screens of different aperture sizes.

[0003] The screen plate is one of the core components of a desliming screen, primarily functioning to support materials and perform screening. Installed on the screen box, the screen plate is prone to detachment due to prolonged impact from materials. Currently, to improve the monitoring capability of screen plate detachment, sensors are typically installed on the screen box to monitor the screen plate's position. When a screen plate detaches, the sensor transmits a signal to the control system, which then automatically stops the desliming screen from operation.

[0004] While the above method can automatically stop the desliming screen when the screen plate falls off, it cannot prevent large pieces of material from entering the dilute medium section after the screen plate falls off. Large pieces of material will mix with the medium, resulting in an increase in the impurity content in the dilute medium suspension. This not only reduces the medium recovery rate and increases the medium consumption cost, causing waste of the medium, but also causes pipeline blockage and triggers a chain of damage to subsequent equipment (such as centrifuges and pumps). Utility Model Content

[0005] To address the technical problems in the existing technology that rely solely on sensors to monitor screen plate detachment and control the desliming screen to stop operating, which fails to prevent large pieces of material from entering the dilute medium section after the screen plate detaches, causing large pieces of material to mix with the medium, resulting in medium waste, pipeline blockage, and cascading damage to subsequent equipment, this utility model provides a screen plate detachment monitoring and interception device.

[0006] The technical solution of this utility model is as follows:

[0007] This utility model provides a screen plate detachment monitoring and interception device, including an interception filter plate disposed inside a screen box, located below the screen plate. Both sides of the interception filter plate are connected to pulley assemblies via steel wire ropes. The pulley assemblies are suspended from the bottom of a crossbeam inside the screen box. The pulley assembly includes a movable pulley with a counterweight mounted on it. A proximity switch for monitoring the position of the movable pulley is installed at the bottom of the crossbeam. When the screen plate detaches, large pieces of material fall onto the interception filter plate, and the medium passes through the interception filter plate and continues to fall, thus intercepting the large pieces of material. Simultaneously, the large pieces of material press the interception filter plate downwards, causing the movable pulley to move upwards. The proximity switch monitors the position of the movable pulley online, thereby achieving online monitoring of the screen plate detachment.

[0008] Preferably, the pulley assembly includes a fixed pulley, one end of a wire rope is fixedly connected to the bottom of the crossbeam, and the other end of the wire rope passes through the movable pulley and the fixed pulley in sequence and is connected to the intercepting filter plate. The counterweight and the intercepting filter plate respectively provide opposing pulling forces to the movable pulley, thereby stabilizing and limiting the position of the intercepting filter plate.

[0009] Preferably, two mounting plates are fixedly installed at the bottom of the crossbeam, and hanging rings are fixed on the mounting plates. The fixed pulley is rotatably mounted on the fixed pulley bracket, and a hook is fixedly installed on the top of the fixed pulley bracket. The fixed pulley bracket is hung on the hanging ring of one mounting plate, and the hanging ring of the other mounting plate is fixedly connected to the wire rope. This facilitates the installation and fixing of the fixed pulley and the wire rope, and also facilitates subsequent maintenance and replacement.

[0010] Preferably, the movable pulley is rotatably mounted on the movable pulley bracket, and a hook is fixedly provided at the bottom of the movable pulley bracket. The movable pulley bracket is connected to the counterweight through the hook, which facilitates the assembly and disassembly of the counterweight and the movable pulley.

[0011] Preferably, the pulley assembly has at least one movable pulley to meet the needs of different working conditions.

[0012] Preferably, at least one set of pulley assemblies is provided on each side of the intercepting filter plate, which is set according to the actual size of the intercepting filter plate to ensure the stability of the intercepting filter plate.

[0013] Preferably, hanging rings are fixed on both sides of the intercepting filter plate, and a hook is fixedly installed at the end of the steel wire rope that connects to the intercepting filter plate, which improves the convenience of connecting the intercepting filter plate and the steel wire rope.

[0014] Preferably, the pore size of the intercepting filter plate is 20mm-25mm, which facilitates the rapid passage of the medium through the intercepting filter plate and also serves to intercept large pieces of material.

[0015] This utility model provides a desizing screen that uses the aforementioned screen plate falling off monitoring and interception device.

[0016] Preferably, the intercepting filter plate is located in the dilute medium section area below the sieve plate to intercept large pieces of material when the sieve plate falls off, preventing large pieces of material from mixing with the medium and avoiding an increase in the impurity content in the dilute medium suspension.

[0017] As can be seen from the above technical solutions, the advantages of this utility model are:

[0018] An intercepting filter plate is installed below the screen plate. Both sides of the intercepting filter plate are connected to pulley assemblies by steel wire ropes. The pulley assemblies are suspended from the bottom of the crossbeam inside the screen box. A proximity switch is installed at the bottom of the crossbeam to monitor the position of the moving pulley. When the screen plate falls off, large pieces of material fall onto the intercepting filter plate. The medium passes through the intercepting filter plate and continues to fall, thus intercepting the large pieces of material. At the same time, the large pieces of material press the intercepting filter plate downward, causing the moving pulley to move upward. The proximity switch monitors the position of the moving pulley online, thereby realizing online monitoring of the screen plate falling off. Attached Figure Description

[0019] To more clearly illustrate the technical solution of this utility model, the drawings used in the description will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of the sieve plate falling off monitoring and interception device according to one or more embodiments of the present invention (only one set of pulley assembly is shown).

[0021] Figure 2 This is a schematic diagram showing the positional relationship between the sieve plate and the intercepting filter plate according to one or more embodiments of the present invention;

[0022] The components represented by the various reference numerals in the diagram are:

[0023] 1. Fixed pulley; 2. Movable pulley; 3. Wire rope; 4. Counterweight; 5. Filter plate; 6. Crossbeam; 7. Fixed pulley bracket; 8. Movable pulley bracket; 9. Hook; 10. Mounting plate; 11. Hanging ring; 12. Proximity switch; 13. Screen box; 14. Screen plate; 15. Under-screen zone. Detailed Implementation

[0024] To make the objectives, features, and advantages of this utility model more apparent and understandable, the technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings of the specific embodiments. Obviously, the embodiments described below are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this patent, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this patent.

[0025] Example 1

[0026] In a typical embodiment of this utility model, such as Figures 1-2 As shown, a screen plate detachment monitoring and interception device is proposed. The device is installed below the screen plate 14 and is used to monitor the detachment of the screen plate 14 while intercepting large pieces of material. The screen plate detachment monitoring and interception device includes: an interception filter plate 5, a pulley assembly, a steel wire rope 3, and a proximity switch 12. Several sets of pulley assemblies are provided. Specifically, at least one set of pulley assemblies is provided on each side of the interception filter plate 5. The pulley assemblies are installed at the bottom of the crossbeam 6 inside the screen box 13, and the two sides of the interception filter plate 5 are connected to the adjacent pulley assemblies via the steel wire rope 3. Thus, through the cooperation of the pulley assemblies and the steel wire rope 3, the interception filter plate 5 is suspended above the screen plate 14 of the desliming screen. Below, specifically in the dilute medium section area below the screen plate 14, the movable pulley 2 in the pulley assembly is equipped with a counterweight 4 to limit the position of the intercepting filter plate 5. The proximity switch 12 is fixedly installed at the bottom of the crossbeam 6 and directly above the movable pulley 2. It is used to monitor the position of the movable pulley 2 online. When the screen plate 14 falls off, large pieces of material fall onto the intercepting filter plate 5. The medium passes through the intercepting filter plate 5, thereby intercepting the large pieces of material. At the same time, the large pieces of material press the intercepting filter plate 5 downward, causing the movable pulley 2 to move upward. The proximity switch 12 monitors the position of the movable pulley 2 online, thereby realizing online monitoring of the fall of the screen plate 14.

[0027] It is understood that in other embodiments, a control mechanism may also be provided, which includes a PLC control hub and connects the proximity switch 12 to the control mechanism. When the control mechanism receives the monitoring signal from the proximity switch 12, it can control the shutdown of the desliming screen. This is prior art and will not be described in detail here.

[0028] like Figure 1As shown, the pulley assembly includes a fixed pulley 1, a movable pulley 2, a fixed pulley bracket 7, and a movable pulley bracket 8. The fixed pulley 1 is rotatably mounted on the fixed pulley bracket 7 via a rotating shaft, and the movable pulley 2 is rotatably mounted on the movable pulley bracket 8 via a rotating shaft. Both the fixed pulley bracket 7 and the movable pulley bracket 8 are U-shaped brackets. The fixed pulley bracket 7 is suspended at the bottom of the crossbeam 6, thereby restricting the position of the fixed pulley 1. The movable pulley 2 is located on the side of the fixed pulley 1 away from the intercepting filter plate 5. One end of the wire rope 3 is fixedly connected to the bottom of the crossbeam 6, and the other end of the wire rope 3 passes through the movable pulley 2 and the fixed pulley 1 in sequence before being connected to the intercepting filter plate 5.

[0029] The fixed pulley bracket 7 is fixedly provided with a hook 9 at the top, and the movable pulley bracket 8 is fixedly provided with a hook 9 at the bottom. The fixed pulley bracket 7 is suspended at the bottom of the crossbeam 6 through the hook 9, and the movable pulley bracket 8 is connected to the counterweight 4 through the hook 9, thereby using the counterweight 4 to restrict the position of the interception filter plate 5. In this embodiment, the counterweight 4 is 3-8kg.

[0030] It is understood that each pulley assembly in this embodiment contains one movable pulley 2. In other embodiments, the pulley assembly may also be provided with multiple movable pulleys 2. The specific number can be selected according to actual needs, and no further restrictions are imposed here.

[0031] like Figure 1 As shown, two mounting plates 10 are fixedly installed at the bottom of the crossbeam 6 by welding or bolting. Hanging rings 11 are welded and fixed on the mounting plates 10. The hooks 9 on the top of the fixed pulley bracket 7 are hooked onto the hanging rings 11 of one mounting plate 10 to realize the hoisting of the fixed pulley 1. The hanging rings 11 of the other mounting plate 10 are used to connect with the wire rope 3 to realize the fixation of one end of the wire rope 3.

[0032] The intercepting filter plate 5 is a wear-resistant filter plate structure with a pore size of 20mm-25mm. Hanging rings 11 are welded and fixed on both sides of the intercepting filter plate 5, and a hook 9 is fixedly installed on the end of the steel wire rope 3 used to connect with the intercepting filter plate 5. Thus, the steel wire rope 3 and the intercepting filter plate 5 can be quickly connected through the cooperation of the hook 9 and the hanging rings 11.

[0033] In this embodiment, the proximity switch 12 adopts an IP67 protection rating to provide dustproof and short-term waterproof capabilities. The housing of the proximity switch 12 has a built-in self-test circuit to prevent false triggering.

[0034] Example 2

[0035] In a typical embodiment of this utility model, a desliming screen is proposed, which adopts the screen plate falling off monitoring and interception device mentioned in Example 1. The desliming screen includes: screen box 13, screen plate 14 and vibration unit. The screen plate falling off monitoring and interception device is installed in the under-screen area 15 below the screen plate 14. Specifically, the interception filter plate 5 is located in the dilute medium section area below the screen plate 14, so as to monitor whether the screen plate 14 falls off and to intercept large pieces of material.

[0036] Specifically, a crossbeam 6 is welded and fixed inside the screen box 13. A proximity switch 12 and two mounting plates 10 are fixed at the bottom of the crossbeam 6, and a hanging ring 11 is fixed on the mounting plate 10. The fixed pulley 1 is suspended on one mounting plate 10 through the fixed pulley bracket 7. One end of the wire rope 3 is fixedly connected to the hanging ring 11 on the other mounting plate 10. The other end of the wire rope 3 passes through the movable pulley 2 and the fixed pulley 1 in sequence and is connected to the intercepting filter plate 5. A counterweight 4 is hung at the bottom of the movable pulley bracket 8, thereby restricting the position of the intercepting filter plate 5 through the counterweight 4.

[0037] The specific working principle is as follows:

[0038] When the screen plate 14 is not dislodged, the medium (such as magnetite powder) passes through the screen plate 14 and the intercepting filter plate 5 in sequence and falls into the dilute medium section for collection and transfer. When the screen plate 14 is dislodged, large pieces of material (such as coal) fall together with the medium to the intercepting filter plate 5. The medium passes through the intercepting filter plate 5 and continues to move downward. Large pieces of material accumulate on the intercepting filter plate 5. Under the gravity of the large pieces of material, the intercepting filter plate 5 overcomes the weight of the counterweight 4 and is pressed downward. At the same time, the movable pulley 2, the movable pulley support 8 and the counterweight 4 are pulled upward as a whole. After the proximity switch 12 detects the change in the position of the movable pulley 2, it transmits the monitoring information to the control mechanism, and the control mechanism controls the desliming screen to stop working.

[0039] It is understood that in other embodiments, an alarm structure may also be provided and connected to the control mechanism to issue an alarm after the screen plate 14 falls off and the machine stops, so as to alert the staff.

[0040] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A screen plate shedding monitoring interception device, comprising: The intercepting filter plate (5) installed in the sieve box (13) is characterized in that the intercepting filter plate (5) is located below the sieve plate (14), and both sides of the intercepting filter plate (5) are connected to pulley assemblies by steel wire ropes (3). The pulley assembly is suspended at the bottom of the crossbeam (6) inside the sieve box (13). The pulley assembly includes a movable pulley (2) with a counterweight (4) suspended on it. A proximity switch (12) for monitoring the position of the movable pulley (2) is installed at the bottom of the crossbeam (6).

2. The screen panel loss monitoring interception device of claim 1, wherein, The pulley assembly includes a fixed pulley (1), one end of a wire rope (3) is fixedly connected to the bottom of the crossbeam (6), and the other end of the wire rope (3) passes through the movable pulley (2) and the fixed pulley (1) in sequence and is connected to the interception filter plate (5).

3. The screen panel loss monitoring interception device of claim 2, wherein, Two mounting plates (10) are fixedly installed at the bottom of the crossbeam (6). A hanging ring (11) is fixed on the mounting plate (10). The fixed pulley (1) is rotatably mounted on the fixed pulley bracket (7). A hook (9) is fixedly provided on the top of the fixed pulley bracket (7). The fixed pulley bracket (7) is hooked on the hanging ring (11) of one mounting plate (10). The hanging ring (11) of the other mounting plate (10) is fixedly connected to the wire rope (3).

4. The screen panel loss monitoring interception device of claim 1, wherein, The movable pulley (2) is rotatably mounted on the movable pulley bracket (8). The bottom of the movable pulley bracket (8) is fixedly provided with a hook (9). The movable pulley bracket (8) is connected to the counterweight (4) through the hook (9).

5. The screen panel loss monitoring interception device of claim 1, wherein, The pulley assembly shall have at least one movable pulley (2).

6. The screen panel (14) dropout monitoring interception device of claim 1, wherein, At least one set of pulley assemblies is provided on each side of the interceptor filter plate (5).

7. The screen panel loss monitoring interception device of claim 1, wherein, Hanging rings (11) are fixed on both sides of the intercepting filter plate (5), and a hook (9) is fixedly installed at one end of the steel wire rope (3) connected to the intercepting filter plate (5).

8. The screen panel loss monitoring interception device of claim 1, wherein, The pore size of the interceptor filter plate (5) is 20mm-25mm.

9. A medium removal screen characterized in that, The sieve plate detachment monitoring and interception device as described in any one of claims 1-8 is adopted.

10. The scree n of claim 9, wherein, The interceptor filter plate (5) is located in the dilute medium section region below the sieve plate (14).

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