Filter cloth deviation correction mechanism for vacuum filter

Abstract

The utility model aims to provide the filter cloth deviation rectifying mechanism for the vacuum filter, which can remove residual impurities and wastes on the surface of the filter cloth in advance before the deviation rectifying roller mechanism is used for performing deviation rectifying treatment on the filter cloth, so that a more efficient and stable filter cloth deviation rectifying treatment effect is realized. The mechanism comprises a mounting frame serving as a mounting and fixing foundation of other parts, and an adjustable roller set for deviation rectification is mounted at the rear end of the mounting frame and used for judging, identifying and adjusting the filter cloth which is continuously conveyed forwards in the transverse position. A filter cloth cleaning assembly for detecting, identifying, separating and removing residual sludge on the surface of the filter cloth is mounted at the front end of the mounting frame.

Description

Technical Field

[0001] The utility model relates to the field of filtering equipment for industrial production, in particular to a filter cloth deviation correction mechanism for a vacuum filter. Background Art

[0002] A vacuum filter is a device widely used for solid-liquid separation. Its operating principle is based on the application of negative vacuum pressure, precisely separating solid particles from liquid substances in a mixture through a filter medium (such as filter cloth or filter paper). A vacuum filter uses a vacuum pump or other vacuum equipment to create a negative pressure environment, forcing the mixture through the filter medium under negative pressure. During this process, solid particles, due to their large size, are retained by the filter medium, forming a filter cake, while liquid substances pass smoothly through the filter medium and enter a collection container. The filter cloth plays a crucial role in vacuum filters. As the filter medium, the filter cloth directly contacts the suspension to be filtered. Under the action of negative vacuum pressure, the liquid in the suspension is drawn through the filter cloth, while the solid particles are retained by the cloth, thus achieving liquid-solid separation. The characteristics of the filter cloth, such as pore size and material, directly influence the filtration effect and filtration rate. During the filtration process, solid particles first form an initial layer on the filter cloth surface by forming bridges. Subsequently, the solid particles continue to deposit, gradually forming a filter cake of a certain thickness on top of the initial layer. During continuous operation, vacuum filter equipment requires filter cloth correction and adjustment between two filtration processes to address uneven tension and deflection caused by filter cloth shrinkage, prevent material from leaking into the vacuum system and affecting filtrate quality, reduce wear and damage caused by abnormal friction between the filter cloth and machine components, and improve dehydration efficiency. Furthermore, regular filter cloth correction and adjustment can prevent deviation caused by uneven filter cloth tension, correct deviation caused by process parameter changes and uneven cloth material, and ensure that the centerline of the filter cloth and the rubber filter belt coincide along the direction of movement, thereby ensuring efficient filtration and continuous, stable operation of the equipment. When using filter cloth to screen and filter some special types of solid-liquid mixed waste, due to the presence of some harmful components in the raw materials, it is not convenient to manually adjust the filter cloth at close range. Instead, some correction and adjustment devices are required to complete the process.

[0003] Therefore, there are currently some devices that can correct, adjust and reset filter cloths that have offset, twisting or wrinkle problems without the participation of staff. For example, a filter cloth correction device disclosed in the Chinese utility model patent document with application number CN201620260558.8 includes a correction roller, a cylinder, a bearing seat, a slide, a slider, a frame and a filter cloth surrounding the surface of the correction roller. Two parallel slides are set on the frame, and the slide is provided with a dovetail groove structure that matches the bottom of the slider. The bearings at both ends of the correction roller are respectively connected to the bearing seats fixed on the slider for rotation, and the bearing seats drive the correction roller to slide with the slider. The cylinder is connected to the corresponding sliders on both sides through a transmission assembly. Compared with the existing technology, the correction device provided in the utility model solution has the advantages of large processing capacity, high stability requirements, large correction stroke and high power. For example, a vacuum filter cloth chute correction device disclosed in the Chinese utility model patent document with application number CN201620326258.5 includes a filter cloth correction roller and a bearing seat, and the two ends of the filter cloth correction roller are respectively installed at the two ends of the bearing seat; it also includes an upper chute, a lower chute and a slider, the sliders are respectively arranged in the upper chute and the lower chute, and the sliders are respectively connected to the bearing seats; by adopting the above scheme, when the filter cloth deviation angle is large, the filter cloth correction roller can be corrected normally to rotate normally, avoiding the stop of the filter cloth correction roller and causing damage to the bearing, improving the filter cloth processing quality, and at the same time improving the working condition of the vacuum filter cloth machine and reducing the fatigue of the machine; it is also convenient for disassembly and maintenance, thereby improving work efficiency, increasing output and reducing labor costs.

[0004] However, the applicant discovered that in existing deviation-correction devices for vacuum filters, once the filter cloth enters the processing area, the correction device typically only detects and identifies the lateral deviation of the entire filter cloth, without identifying and cleaning the sludge remaining on the filter cloth surface. Therefore, if the deviation-correction rollers were used to directly move and correct the filter cloth based on the deviation of the filter cloth's local position, it would be very easy to cause significant position correction errors, and even the actual adjustment direction might be the same as the deviation direction, further hindering efficient filtration and screening.

[0005] In response to the above problems, the utility model provides a filter cloth correction mechanism for a vacuum filter, which can remove impurities and waste materials remaining on the surface of the filter cloth before using the correction roller mechanism to correct the filter cloth, thereby achieving a more efficient and stable filter cloth correction effect. Utility Model Content

[0006] The utility model provides a filter cloth deviation correction mechanism for a vacuum filter, which can remove impurities and waste materials remaining on the filter cloth surface before using the deviation correction roller mechanism to correct the filter cloth, thereby achieving a more efficient and stable filter cloth deviation correction effect.

[0007] The above technical objectives of the present invention are achieved through the following technical solutions:

[0008] A filter cloth deviation correction mechanism for a vacuum filter includes a mounting frame serving as a base for mounting and fixing other components, an adjustable roller group for deviation correction installed at the rear end of the mounting frame for continuously conveying the filter cloth moving forward to judge, identify and adjust the lateral position, and a filter cloth cleaning component installed at the front end of the mounting frame for detecting, identifying and separating and removing sludge remaining on the surface of the filter cloth.

[0009] As a preferred embodiment of the present invention, the filter cloth cleaning assembly includes two side cantilever parts extending outward from the front end surface of the mounting frame, a transverse guide rail part extending in the horizontal direction is provided between the cantilever parts on both sides, and a liftable lever is installed on the transverse guide rail part, and the lower end portion of the liftable lever can perform transverse translation and lifting motion under the drive of the driving device.

[0010] As a preferred embodiment of the present invention, the liftable lever includes a first connecting section for connecting to the transverse guide rail portion, and a second connecting section installed under the first connecting section, and a lever head portion for locally peeling sludge from the surface of the filter cloth is provided at the end of the second connecting section.

[0011] As a preferred embodiment of the present invention, a guide plate for guiding the sludge peeled off from the surface of the filter cloth to the outside is further provided on the cantilever portion at the rear side of the liftable lever.

[0012] As a preferred embodiment of the present invention, the adjustable roller group for correction includes a correction roller that is in contact with the surface of the filter cloth and is arranged in a horizontal state. One end of the correction roller is movably connected to a connecting rod installed on one side of the mounting frame through a hinge structure, and the other end of the correction roller is also movably connected to a movable supporting device installed on the other side of the mounting frame through a hinge structure.

[0013] As a preferred embodiment of the present invention, the surface of the deviation-correcting roller is formed with a concave-convex surface structure for enhancing the effect of the lateral correction and pushing action.

[0014] As a preferred embodiment of the present invention, the deviation-correcting roller adopts an eccentric structure.

[0015] In summary, the present invention can achieve the following multiple beneficial effects:

[0016] The filter cloth deviation correction mechanism for a vacuum filter provided in the solution of the utility model can efficiently identify and remove the sludge remaining on the filter cloth after a complete filtering process, thereby reducing the thickness difference formed by the residual sludge on the filter cloth surface, which leads to the error of the subsequent deviation correction roller in adjusting the filter cloth position, and further ensures that the filter cloth continues to be in a relatively central preset position for residual filtering, thereby ensuring the stable operation of the filtering equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the overall layout structure of the filter cloth correction mechanism for a vacuum filter;

[0018] Figure 2 A schematic diagram of the cross-sectional structure of a correction roller having a concave-convex surface structure;

[0019] Figure 3 This is a schematic diagram of the principle of using a liftable lever to clean the residual sludge on the filter cloth surface;

[0020] Figure 4 This is a schematic diagram of the principle of the filter cloth cleaning component cleaning the residual sludge on the filter cloth surface from a top view.

[0021] In the picture:

[0022] 1——Mounting frame;

[0023] 2 - Adjustable roller group for deviation correction, 201 - deviation correction roller, 202 - connecting rod, 203 - movable support device, 2011 - concave and convex surface structure;

[0024] 3 - filter cloth cleaning assembly, 301 - identification probe, 302 - cantilever part, 303 - transverse guide rail part;

[0025] 4 - liftable lever, 401 - first connecting section, 402 - second connecting section, 403 - dial head;

[0026] 5 – guide plate;

[0027] 6 - filter cloth;

[0028] 7——Sludge.

[0029] 1——Mounting frame 1;

[0030] 2 - adjustable roller group 2 for deviation correction, 201 - deviation correction roller 201, 202 - connecting rod 202, 203 - movable supporting device 203, 2011 - concave-convex surface structure 2011;

[0031] 3 - filter cloth cleaning assembly 3, 301 - identification probe 301, 302 - cantilever part 302, 303 - transverse guide rail part 303;

[0032] 4 - liftable lever 4, 401 - first connecting section 401, 402 - second connecting section 402, 403 - lever head 403;

[0033] 5——guide plate 5;

[0034] 6——filter cloth 6;

[0035] 7——Sludge 7. DETAILED DESCRIPTION

[0036] The following specific embodiments are merely explanations of the present invention and are not limitations of the present invention. After reading this specification, those skilled in the art may make modifications to the embodiments as needed that do not contribute to creativity. However, as long as they are within the scope of the claims of the present invention, they are protected by patent law.

[0037] This solution is achieved through the following technical means:

[0038] Embodiment: In this embodiment, a filter cloth correction mechanism for a vacuum filter is provided, which can remove impurities and waste materials remaining on the surface of the filter cloth 6 before using the correction roller 201 drum mechanism to correct the filter cloth 6, thereby achieving a more efficient and stable correction effect of the filter cloth 6.

[0039] First of all, it should be noted that the embodiment of this application is based on a filter cloth correction device disclosed in the Chinese utility model patent document with application number CN201620260558.8 for targeted optimization and improvement. Figure 1 The structure given, the filter cloth correction mechanism for the vacuum filter given in the present application scheme includes three main parts: a mounting frame 1 serving as a fixing base for mounting other components, an adjustable roller group 2 for correction is installed at the rear end of the mounting frame 1 for continuously conveying the filter cloth 6 moving forward to judge, identify and adjust the lateral position, and a filter cloth cleaning component 3 is installed at the front end of the mounting frame 1 for detecting, identifying and separating and removing the sludge 7 remaining on the surface of the filter cloth 6.

[0040] Here, the mounting frame 1 is an inverted U-shaped structure with a downward opening, and the filter cloth 6 continuously moves forward from below the mounting frame 1 in an extended state. The adjustable roller assembly 2 for correcting deviations, mounted on the mounting frame 1, primarily comprises a correcting roller 201 disposed on the rear side of the mounting frame 1. One end of the correcting roller 201 is movably connected to a connecting rod 202 mounted on one side of the mounting frame 1 via a hinged structure, while the other end of the correcting roller 201 is also movably connected to a movable support device 203 mounted on the other side of the mounting frame 1 via a hinged structure. It should be noted that at least a portion of the filter cloth 6 contacts and surrounds the outer side of the correcting roller 201 while continuing to move forward. At this point, after the rear-side determination and detection device observes and analyzes the overall position of the filter cloth 6, the rotational axis of the correcting roller 201 can be deflected within the horizontal plane by simply driving, for example, a pneumatic cylinder or an electrically operated telescopic rod, which acts as the movable support device 203, to perform telescopic movement. At this time, depending on the deflection direction, the correcting roller 201 can generate a pulling force to the left or right on the filter cloth 6, thereby allowing the filter cloth 6 passing through the correcting roller 201 to return to the correct preset working position.

[0041] Since the structure and working principle of this part have been clearly demonstrated and explained in the existing technical solutions of the comparative documents, they will not be repeated here.

[0042] In the present application, the most important improvement is that, based on the existing deviation correction device, a filter cloth cleaning component 3 is added to the front side of the mounting frame 1 to clean the small amount of sludge 7 remaining on the surface of the filter cloth 6 in advance, so as to ensure as much as possible that the filter cloth 6 entering the working area of ​​the deviation correction roller 201 is in a state of uniform thickness, thereby improving the accuracy of the position correction of the filter cloth 6. Specifically, the filter cloth cleaning component 3 here includes an identification probe 301 close to the side away from the mounting frame 1. The identification probe 301 can be set downward and can continuously observe downward to accurately determine the coordinate position of the sludge 7 still attached to the filter cloth 6. See the attached instruction manual. Figure 4 Taking the structure shown as an example, the identification probe 301 is mounted and fixed at the front end of a base plate, passing between two cantilevered arms 302, in the middle. The cantilevered arms 302 are fixed to either side of the mounting frame 1 and extend horizontally toward the front end of the mounting frame 1. A horizontally extending transverse guide rail 303 is provided between the two cantilevered arms 302. A liftable lever 4 is mounted on the guide rail 303. The lower end of the liftable lever 4 is capable of lateral translation and elevation motion driven by a drive mechanism.

[0043] For details, please refer to the attached manual. Figure 3In the illustrated structure, the liftable lever 4 comprises a first connecting section 401 and a second connecting section 402, each movably connected to each other. The second connecting section 402 is mounted below the first connecting section 401 and is capable of vertically lifting and lowering relative to the first connecting section 401 under the control of a control module. Specifically, for example, the second connecting section 402 and the first connecting section 401 are threadedly engaged. Driven by a motor serving as a driving device, the second connecting section 402 can rotate relative to the first connecting section 401, simultaneously lifting and lowering the second connecting section 402 toward or away from the upper surface of the filter cloth 6. Furthermore, a lifting section 403 is provided at the lower end of the second connecting section 402 for partially removing sludge 7 from the surface of the filter cloth 6. This section, for example, can be a thin, rubber scraper. While ensuring efficient cleaning, it utilizes its elastic deformation to prevent damage to the filter cloth 6. It should also be noted that the liftable lever 4 is integrally mounted on a horizontally extending transverse guide rail 303 located between the two cantilevered arms 302. At this time, the drag chain mechanism can be used to drive the liftable lever 4 to perform translational movement along the transverse guide rail portion 303 .

[0044] Attached with instruction manual Figure 4 Taking the structure provided as an example, when the filter cloth deflection correction mechanism of the vacuum filter described in this embodiment is in operation, the filter cloth 6 continuously moves forward and passes through the area below the aforementioned identification probe 301. The identification probe 301 analyzes and processes the positional information of the sludge 7 remaining on the filter cloth 6, which it identifies and determines. This information is then transmitted to the control module, which rapidly signals the drive device that controls the movement and extension of the elevating lever 4, thereby driving the head 403 at the lower end of the elevating lever 4 to move to a target position and engage the filter cloth 6. As the filter cloth 6 continues to move, the head 403 scrapes or peels off any remaining sludge 7, thereby freeing it from a tight bond with the filter cloth 6. Furthermore, a guide plate 5 is provided on the cantilever portion 302, located behind the elevating lever 4, to guide the sludge 7 peeled off the surface of the filter cloth 6 outward. The guide plate 5 appears tilted when viewed from above. After being peeled off the filter cloth 6, the sludge 7 continues to move forward along with the movement of the filter cloth 6. The function of the guide plate 5 is to guide this sludge 7 toward the side of the filter cloth 6 through its inclined surface before it is pushed further onto the deflection correction roller 201, thereby cleaning the sludge 7 from the filter cloth 6. At this point, the filter cloth 6 can enter the working area of ​​the deflection correction roller 201 in a cleaner state, effectively improving the operating accuracy of the deflection correction mechanism proposed in this solution.

[0045] As a preferred structure, refer to the attached Figure 2 In the structure shown in the embodiment of the present application, a concave-convex surface structure 2011 is formed on the surface of the correction roller 201. For example, a lattice-shaped concave-convex structure can be provided around the outer circumference of the correction roller 201, or an elastic rubber layer structure with concave-convex structures can be provided on the outer circumference of the correction roller 201, thereby increasing the friction between the correction roller 201 and the surface of the filter cloth 6, thereby more efficiently and quickly adjusting the position of the filter cloth 6 that has deviated.

[0046] Furthermore, the applicant has discovered that when the filter cloth 6 is involved in the filtration process, while being subjected to suction filtration, localized stacking wrinkles are likely to appear on the surface of the filter cloth 6. Simultaneously, this portion of the filter cloth 6 is tightly adhered by the adhesion of a small amount of sludge 7. Clearly, in this state, the sludge 7 cannot be directly removed using the aforementioned filter cloth cleaning assembly 3. Directly adjusting the position of the filter cloth 6 using the correction mechanism also fails to eliminate the localized stacking. Therefore, in the embodiment of the present application, the correction roller 201 is further preferably designed as an eccentric structure. In this case, when the correction roller 201 rotates, the path traversed by different points on the filter cloth 6 surrounding it repeatedly oscillates, thereby generating a periodic, intermittent pulling and oscillating effect on the filter cloth 6. This causes the localized filter cloth 6, which is adhered and connected due to the adhesion of the sludge 7, to be pulled apart, returning to its pre-set, flat, spread state, thereby ensuring the efficiency and stability of the filter cloth 6 when it subsequently re-enters the filtration cycle.

[0047] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any person skilled in the art can easily conceive of various equivalent modifications or substitutions within the technical scope disclosed in the present invention, and such modifications or substitutions are intended to be within the scope of protection of the present invention. Therefore, the scope of protection of the present invention shall be subject to the scope of protection of the claims.

Claims

1. A filter cloth deviation correction mechanism for a vacuum filter, characterized by: The invention comprises a mounting frame (1) serving as a base for mounting and fixing other components, a deviation-correcting adjustable roller group (2) for judging, identifying and adjusting the lateral position of a filter cloth (6) that is continuously transported forward, and a filter cloth cleaning assembly (3) for detecting, identifying and separating sludge (7) remaining on the surface of the filter cloth (6) is installed at the front end of the mounting frame (1).

2. The filter cloth deviation correction mechanism for a vacuum filter according to claim 1, characterized in that: The filter cloth cleaning assembly (3) comprises an identification probe (301) and two cantilevered arms (302) extending outward from the front end of the mounting frame (1). A transverse guide rail (303) extending in the horizontal direction is provided between the two cantilevered arms (302). A liftable lever (4) is installed on the transverse guide rail (303). The lower end of the liftable lever (4) can be driven by a driving device to perform transverse translation and lifting movements.

3. The filter cloth deviation correction mechanism for a vacuum filter according to claim 2, characterized in that: The liftable lever (4) comprises a first connecting section (401) for connecting to the transverse guide rail section (303), and a second connecting section (402) plugged and installed below the first connecting section (401). A lifting section (403) for partially peeling off sludge (7) from the surface of the filter cloth (6) is provided at the end of the second connecting section (402).

4. The filter cloth deviation correction mechanism for a vacuum filter according to claim 3, characterized in that: A guide plate (5) for guiding sludge (7) peeled off from the surface of the filter cloth (6) to the outside is also provided on the cantilever portion (302) at the rear side of the liftable lever (4).

5. The filter cloth deviation correction mechanism for a vacuum filter according to claim 4, characterized in that: The adjustable roller group (2) for correcting the deviation includes a correcting roller (201) that is attached to the surface of the filter cloth (6) and is arranged in a horizontal state. One end of the correcting roller (201) is movably connected to a connecting rod (202) installed on one side of the mounting frame (1) through a hinge structure, and the other end of the correcting roller (201) is also movably connected to a movable supporting device (203) installed on the other side of the mounting frame (1) through a hinge structure.

6. The filter cloth deviation correction mechanism for a vacuum filter according to claim 5, characterized in that: The surface of the deviation-correcting roller (201) is formed with a concave-convex surface structure (2011) for enhancing the effect of lateral correction and pushing.

7. The filter cloth deviation correction mechanism for a vacuum filter according to claim 6, characterized in that: The deviation-correcting roller (201) adopts an eccentric structure.

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