Filter cloth slitting and unwinding device

Abstract

The utility model discloses a filter cloth slitting unwinding device, including unwinding device and slitting device, unwinding device is including unwinding frame, is provided with unwinding support pole on unwinding frame, unwinding frame is installed with friction roller, tension adjusting roller and transition roller according to filter cloth unwinding path order rotation, and slitting device includes slitting frame, and the upstream side of slitting frame is rotatably installed with lower detection roller and upper detection roller, and the region between upper detection roller and lower detection roller constitutes detection area, and the metal detector is installed on slitting frame, and the downstream of detection area is provided with slitting mechanism, and the downstream of slitting mechanism is provided with length measuring wheel, and length measuring guide roller and length measuring wheel cooperate and compact filter cloth to filter cloth length measurement, and this slitting unwinding device can carry out metal detection to filter cloth in the process of filter cloth unwinding slitting, thereby convenient to determine broken needle position, and it is convenient to clean broken needle.

Description

Technical Field

[0001] This utility model relates to the field of filter cloth production technology, and in particular to a filter cloth slitting and unwinding device. Background Technology

[0002] Industrial baghouse dust collectors require filter bags, which are made by sewing filter cloth into a specified shape. A filter bag consists of a body and an opening, both formed by cutting the filter cloth into strips of a specified width and then sewing them together. Therefore, the filter cloth needs to be cut using a slitting machine. Current slitting machines mainly include a filter cloth unwinding mechanism. The filter cloth is wound onto an unwinding shaft to form a roll. After unwinding, the filter cloth roll passes through various transition rollers and then through spaced-apart slitting cutters. The slitting cutters, driven by cylinders, descend to slit the filter cloth.

[0003] However, the current slitting device has the following problems: 1. The slitting blade of the current slitting device is installed on the lifting seat, which is driven by a cylinder. The lifting seat is also equipped with a drive motor that drives the blade to rotate. The mounting base is tightened to the mounting shaft that spans the filter cloth by bolts. Adjusting the position is relatively troublesome. The bolts need to be loosened before the entire cutting assembly can be adjusted. Since the cutting assembly is relatively large, a lot of force is required when loosening and moving it. Also, since the blade is still there, extra care is needed when moving it; 2. The current slitting device can only slit the filter cloth. However, the filter cloth will be needled by a needle punching machine during the production process. During the needle punching process, needles may break. The broken needles will get stuck in the filter cloth and may injure users during the subsequent sewing, transportation and use of the filter bags. Utility Model Content

[0004] The technical problem to be solved by this utility model is to provide a filter cloth slitting and unwinding device, which can detect metal in the filter cloth during the unwinding and slitting process, thereby facilitating the determination of the broken needle location and the cleaning of the broken needle.

[0005] To solve the above-mentioned technical problems, the technical solution of this utility model is: a filter cloth slitting and unwinding device, including an unwinding device and a slitting device. The unwinding device includes an unwinding frame, on which an unwinding support rod for supporting the filter cloth unwinding shaft is provided. Friction rollers, tension adjusting rollers, and transition rollers are rotatably installed on the unwinding frame in sequence according to the filter cloth unwinding path. The slitting device includes a slitting frame, on which a lower detection roller and an upper detection roller are rotatably installed on the upstream side. The upper detection roller is located above the lower detection roller, and the area between the upper and lower detection rollers constitutes a detection area. A metal detector for detecting metal is installed on the slitting frame at the detection area. Downstream of the detection area, a slitting mechanism for slitting the filter cloth is provided. Downstream of the slitting mechanism, a length measuring guide roller and a length measuring wheel that cooperate with the length measuring guide roller are provided. The length measuring guide roller and the length measuring wheel cooperate to press the filter cloth to measure its length.

[0006] As a preferred embodiment, the metal detector includes a mounting frame, the length of which is greater than the width of the filter cloth, and a plurality of metal detection modules are mounted on the mounting frame, the metal detection modules being arranged along the width direction, and a plurality of alarms corresponding to and connected to the metal detection modules are provided on the slitting frame.

[0007] As a preferred embodiment, the slitting mechanism includes a lower support roller fixed on the slitting frame, a plurality of slitting blade holders spaced apart on the lower support roller, each slitting blade holder having a blade groove, an mounting shaft fixedly mounted on the slitting frame above the lower support roller, a plurality of slitting modules mounted on the mounting shaft, each slitting module including a slitting support mounted on the mounting shaft, a lifting seat driven by a lifting power device vertically slidingly mounted on the slitting support, a slitting blade driven by a motor rotatably mounted on the lifting seat, the slitting blade engaging with a corresponding blade groove below.

[0008] As a preferred embodiment, there are two mounting shafts arranged vertically. The slitting support is slidably mounted on the two mounting shafts. The lower mounting shaft is provided with axially extending teeth, which form a rack structure. A gear that meshes with the rack structure is rotatably mounted on the slitting support. The gear is operated to rotate by a control mechanism. The slitting cutter holder on the lower support roller is slidably sleeved on the lower support roller and fastened by bolts.

[0009] As a preferred embodiment, the control mechanism is an operating knob, which is fixed on an operating shaft. The operating shaft is fixedly connected to the center of the gear, and the lifting seat is provided with a vertical slot, through which the operating shaft passes.

[0010] As a preferred embodiment, the friction roller comprises a metal roller body, the outer peripheral surface of which is bonded with a fleece layer to enhance friction.

[0011] As a preferred embodiment, the tension adjusting roller includes two lifting roller seats and a pressure adjusting roller shaft rotatably mounted between the lifting roller seats. The lifting roller seats are vertically and slidably mounted on the unwinding frame. A vertically arranged screw and nut mechanism is provided between the lifting roller seats and the unwinding frame. A handwheel is installed at the upper end of the screw of the screw and nut mechanism.

[0012] As a preferred embodiment, the upper end of the unwinding support rod is provided with a support groove for supporting the filter cloth unwinding shaft, and the support groove is a stepped groove formed by connecting two grooves of different widths.

[0013] After adopting the above technical solution, the effect of this utility model is as follows: The slitting device includes a slitting frame, with a lower detection roller and an upper detection roller rotatably mounted on the upstream side of the slitting frame. The upper detection roller is located above the lower detection roller, and the area between the upper and lower detection rollers constitutes the detection area. A metal detector for detecting metal is installed on the slitting frame at the detection area. A slitting mechanism for slitting the filter cloth is provided downstream of the detection area. A length-measuring guide roller and a length-measuring wheel that cooperate with the length-measuring guide roller are provided downstream of the slitting mechanism. The length-measuring guide roller and the length-measuring wheel cooperate to press the filter cloth to measure its length. Therefore, after the filter cloth roll is unwound, the unwound filter cloth passes through the lower detection roller and the upper detection roller from bottom to top and then enters the slitting mechanism. Since the filter cloth passes through the detection area, there is a metal detector in the detection area. The principle and structure of the metal detector are existing technologies. The preferred type is an electromagnetic induction metal detector. Its currently known basic principle is as follows: The metal detector has three sets of coils distributed inside, namely a central transmitting coil and two equal receiving coils. A high-frequency variable magnetic field is generated by an oscillator connected to the central transmitting coil. In the idle state, the induced voltages of the receiving coils on both sides cancel each other out and reach a balanced state before the magnetic field is disturbed. Once a broken needle enters the magnetic field area, the magnetic field is disturbed, disrupting the balance. The induced voltages of the two receiving coils can no longer cancel each other out. The uncancelled induced voltage is amplified and processed by the control system, generating an alarm signal to detect the broken needle. Therefore, once the metal detector detects a broken needle, the unwinding device stops unwinding. Downstream of the unwinding device is a rewinding device, which will also stop rewinding. Then, a manual inspection of the entire width of the filter cloth is performed to remove the broken needle. After that, the unwinding and slitting process is restarted. This slitting and unwinding device can cut the filter cloth and detect broken needles, facilitating manual removal.

[0014] Furthermore, since the metal detector includes an installation frame, the length of which is greater than the width of the filter cloth, and several metal detection modules are installed on the installation frame, with the metal detection modules arranged along the width direction, and several alarms connected to the metal detection modules one-to-one on the slitting frame, the entire width direction is divided into smaller detection areas by multiple metal detection modules. In this way, once a needle is found at a certain position, the nearest metal detection module will detect it, and the corresponding alarm will sound. This makes it easier for operators to clean and remove broken needles in a smaller area.

[0015] Since there are two mounting shafts arranged vertically, the slitting support is slidably mounted on the two mounting shafts. The lower mounting shaft has axially extending teeth that form a rack structure. A gear that meshes with the rack structure is rotatably mounted on the slitting support. The gear is operated to rotate by a control mechanism. The slitting cutter holder on the lower support roller is slidably sleeved on the lower support roller and secured with bolts. Therefore, the gear can be rotated by the operating mechanism, which in turn allows the slitting support to slide along the mounting shaft, thus ensuring that the spacing between the slitting supports meets the slitting requirements. Since the gear and rack structure mesh with each other, no additional locking is required. Once adjusted to the correct position, the position of the slitting support can be determined. This structure is easy to operate.

[0016] Furthermore, since the control mechanism is an operating knob, which is fixed on the operating shaft, and the operating shaft is fixedly connected to the center of the gear, and the lifting seat is provided with a vertical slot, through which the operating shaft passes, the gear can be rotated and its position adjusted by rotating the operating knob. The vertical slot allows the operating shaft to pass through easily without hindering the lifting of the lifting seat.

[0017] Furthermore, since the upper end of the unwinding support rod is provided with a support groove for supporting the filter cloth unwinding shaft, and the support groove is a stepped groove formed by connecting two grooves of different widths, the filter cloth unwinding shafts of different diameters can be supported through the stepped groove, making it more adaptable. Attached Figure Description

[0018] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0019] Figure 1 This is a structural schematic diagram of an embodiment of the present utility model;

[0020] Figure 2 This is a structural schematic diagram from another angle of an embodiment of the present invention;

[0021] Figure 3 This is a schematic diagram of an embodiment of the present invention with omitted parts of the structure;

[0022] Figure 4 yes Figure 3 A structural diagram from another angle;

[0023] Figure 5 This is a view of the rear end face of an embodiment of the present invention;

[0024] Figure 6 yes Figure 4 Enlarged view of the structure at point A in the middle;

[0025] In the attached diagram: 1. Unwinding frame; 2. Unwinding support rod; 21. Step groove; 3. Friction roller; 4. Tension adjusting roller; 41. Lifting roller seat; 42. Pressure adjusting roller shaft; 43. Screw and nut mechanism; 44. Handwheel; 5. Transition roller; 6. Slitting frame; 7. Lower detection roller; 8. Upper detection roller; 9. Metal detector; 91. Mounting frame; 92. Metal detection module; 93. Alarm; 10. Slitting mechanism; 101. Lower support roller; 102. Slitting blade seat; 103. Mounting shaft; 104. Slitting support; 105. Lifting power unit; 106. Lifting seat; 107. Slitting blade; 108. Gear; 109. Vertical strip hole; 110. Motor; 11. Length measuring guide roller; 12. Length measuring wheel; 13. Operating knob. Detailed Implementation

[0026] The present invention will be further described in detail below through specific embodiments.

[0027] like Figure 1-6 As shown, a filter cloth slitting and unwinding device includes an unwinding device and a slitting device. The unwinding device includes an unwinding frame 1, on which an unwinding support rod 2 for supporting the filter cloth unwinding shaft is provided. Friction rollers 3, tension adjusting rollers 4 and transition rollers 5 are rotatably installed on the unwinding frame 1 in sequence according to the filter cloth unwinding path. The slitting device includes a slitting frame 6, on which a lower detection roller 7 and an upper detection roller 8 are rotatably installed on the upstream side of the slitting frame 6. The upper detection roller 8 is located above the lower detection roller 7. The area between the upper detection roller 8 and the lower detection roller 7 constitutes a detection area. A metal detector 9 for detecting metal is installed on the slitting frame 6 at the detection area. Downstream of the detection area, a slitting mechanism 10 for slitting the filter cloth is provided. Downstream of the slitting mechanism 10, a length measuring guide roller 11 and a length measuring wheel 12 that cooperates with the length measuring guide roller 11 are provided. The length measuring guide roller 11 and the length measuring wheel 12 cooperate with each other to press the filter cloth and measure the length of the filter cloth.

[0028] In this embodiment, the metal detector 9 includes a mounting frame 91, the length of which is greater than the width of the filter cloth. Several metal detection modules 92 are mounted on the mounting frame 91 and arranged along the width direction. Several alarms 93 are provided on the slitting frame 6 and are connected to the metal detection modules 92 one by one.

[0029] The slitting mechanism 10 includes a lower support roller 101 fixed on the slitting frame 6. A plurality of slitting blade holders 102 are spaced apart on the lower support roller 101. Each slitting blade holder 102 has a blade groove. An mounting shaft 103 is fixedly installed on the slitting frame 6 above the lower support roller 101. A plurality of slitting modules are mounted on the mounting shaft 103. Each slitting module includes a slitting support 104 mounted on the mounting shaft 103. A lifting seat 106 driven by a lifting power device 105 is vertically slidably mounted on the slitting support 104. A slitting blade 107 driven by a motor 110 is rotatably mounted on the lifting seat 106. The slitting blade 107 cooperates with the corresponding blade groove below. There are two mounting shafts 103 arranged vertically, one above the other. A slitting support 104 is slidably mounted on both shafts. The lower mounting shaft 103 has axially extending teeth on its upper surface, forming a rack structure. A gear 108, meshing with the rack structure, is rotatably mounted on the slitting support 104. The gear 108 is rotated by a control mechanism. A slitting cutter holder 102 on the lower support roller 101 is slidably fitted onto the lower support roller 101 and secured with bolts. In this embodiment, the control mechanism is an operating knob 13, fixed to an operating shaft. The operating shaft is fixedly connected to the center of the gear 108. A vertical slot 109 is provided on the lifting seat 106, through which the operating shaft passes. The lifting power device 105 can be a cylinder.

[0030] In this embodiment, the friction roller 3 includes a metal roller body, and a fleece layer for increasing friction is bonded to the outer circumferential surface of the roller body. The tension adjusting roller 4 includes two lifting roller seats 41 and a pressure adjusting roller shaft 42 rotatably mounted between the lifting roller seats 41. The lifting roller seats 41 are vertically and slidably mounted on the unwinding frame 1. A vertically arranged screw and nut mechanism 43 is provided between the lifting roller seats 41 and the unwinding frame 1. A handwheel 44 is installed at the upper end of the screw of the screw and nut mechanism 43. A support groove for supporting the filter cloth unwinding shaft is provided at the upper end of the unwinding support rod 2. The support groove is a stepped groove 21 formed by connecting two grooves of different widths.

[0031] After the filter cloth roll is unwound, it passes through the lower detection roller 7 and the upper detection roller 8 before entering the slitting mechanism 10. When the filter cloth passes through the detection area, there is a metal detector 9, preferably an electromagnetic induction type. Multiple metal detection modules 92 divide the entire width into smaller detection areas. The basic principle is as follows: The metal detector 9 has three sets of coils inside: a central transmitting coil and two equal receiving coils. A high-frequency variable magnetic field is generated by an oscillator connected to the central transmitting coil. In the idle state, the induced voltages of the receiving coils on both sides cancel each other out before the magnetic field is disturbed, thus achieving a balanced state. Once the broken needle enters the magnetic field area, the magnetic field is disturbed, and this balance is broken. The induced voltages of the two receiving coils can no longer cancel each other out. The uncancelled induced voltage is amplified and processed by the control system, generating an alarm signal. The alarm 93 sounds an alarm, at which point the unwinding device stops unwinding and the winding device stops winding. Then, the entire width of the filter cloth is manually inspected in this area. After the broken needle is pulled out, the unwinding and slitting are restarted. Furthermore, by rotating the operating knob 13, the slitting support 104 slides along the mounting shaft 103, so that the spacing between the slitting supports 104 meets the slitting requirements. The gear 108 and the rack structure mesh with each other, and the vertical bar hole 109 allows the operating shaft to pass through easily without hindering the lifting seat 106 from rising or falling. No additional locking is required. After adjustment, the position of the slitting support 104 is determined.

[0032] The pneumatic system, servo motor 110 and other actuators, gear 108 transmission mechanism, and lead screw and nut mechanism 43 mentioned in this embodiment are all conventional technologies. The specific structure, principle and other design of the cylinder, motor 110 and other transmission mechanisms are disclosed in detail in the 28th printing of the fifth edition of "Mechanical Design Handbook" published in Beijing in April 2008. These are existing technologies with clear and straightforward structures. The third edition of "Modern Practical Pneumatic Technology" SMC training material published by Machinery Industry Press on August 1, 2008, discloses vacuum components, gas circuits and program control in detail, indicating that the pneumatic structure in this embodiment is also existing technology and clear and straightforward. The book "Motor 110 Drive and Speed ​​Regulation" published by Chemical Industry Press on July 1, 2015, also describes the control of motor 110 and limit switches in detail. Therefore, the circuit and pneumatic connections are clear.

[0033] The above-described embodiments are merely preferred embodiments of the present utility model and are not intended to limit the scope of the present utility model. Any modifications and alterations to the technical solution of the present utility model without departing from its design spirit shall fall within the protection scope defined by the claims of the present utility model.

Claims

1. A filter cloth slitting and unwinding device, comprising an unwinding device and a slitting device, wherein the unwinding device includes an unwinding frame, the unwinding frame is provided with an unwinding support rod for supporting the filter cloth unwinding shaft, and friction rollers, tension adjusting rollers, and transition rollers are rotatably mounted on the unwinding frame in sequence according to the filter cloth unwinding path, characterized in that: The slitting device includes a slitting frame. A lower detection roller and an upper detection roller are rotatably mounted on the upstream side of the slitting frame. The upper detection roller is located above the lower detection roller. The area between the upper and lower detection rollers constitutes a detection area. A metal detector for detecting metal is installed on the slitting frame at the detection area. A slitting mechanism for slitting the filter cloth is provided downstream of the detection area. A length measuring guide roller and a length measuring wheel that cooperate with the length measuring guide roller are provided downstream of the slitting mechanism. The length measuring guide roller and the length measuring wheel cooperate to press the filter cloth to measure its length.

2. The filter cloth slitting and unwinding device as described in claim 1, characterized in that: The metal detector includes a mounting frame, the length of which is greater than the width of the filter cloth. Several metal detection modules are mounted on the mounting frame and arranged along the width direction. Several alarms, each corresponding to a metal detection module, are installed on the slitting frame.

3. The filter cloth slitting and unwinding device as described in claim 2, characterized in that: The slitting mechanism includes a lower support roller fixed on the slitting frame, a plurality of slitting blade holders spaced apart on the lower support roller, and a blade groove provided on the slitting blade holder. An installation shaft is fixedly installed on the slitting frame above the lower support roller, and a plurality of slitting modules are installed on the installation shaft. Each slitting module includes a slitting support mounted on the installation shaft. A lifting seat driven by a lifting power device is vertically slidably mounted on the slitting support. A slitting blade driven by a motor is rotatably mounted on the lifting seat, and the slitting blade cooperates with the corresponding blade groove below.

4. The filter cloth slitting and unwinding device as described in claim 3, characterized in that: The number of mounting shafts is two, arranged vertically. The slitting support is slidably mounted on the two mounting shafts. The lower mounting shaft is provided with axially extending teeth, which form a rack structure. A gear that meshes with the rack structure is rotatably mounted on the slitting support. The gear is operated to rotate by a control mechanism. The slitting cutter holder on the lower support roller is slidably sleeved on the lower support roller and fastened by bolts.

5. The filter cloth slitting and unwinding device as described in claim 4, characterized in that: The control mechanism is an operating knob, which is fixed on an operating shaft. The operating shaft is fixedly connected to the center of the gear. The lifting seat is provided with a vertical slot, and the operating shaft passes through the vertical slot.

6. The filter cloth slitting and unwinding device as described in claim 5, characterized in that: The friction roller comprises a metal roller body, and a layer of fleece to enhance friction is bonded to the outer peripheral surface of the roller body.

7. The filter cloth slitting and unwinding device as described in claim 6, characterized in that: The tension adjusting roller includes two lifting roller seats and a pressure adjusting roller shaft rotatably installed between the lifting roller seats. The lifting roller seats are vertically and slidably installed on the unwinding frame. A vertically arranged screw and nut mechanism is provided between the lifting roller seats and the unwinding frame. A handwheel is installed at the upper end of the screw of the screw and nut mechanism.

8. The filter cloth slitting and unwinding device as described in claim 1, characterized in that: The upper end of the unwinding support rod is provided with a support groove for supporting the filter cloth unwinding shaft. The support groove is a stepped groove formed by connecting two grooves of different widths.

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