Deviation correction detection device for sludge filter pressing cloth

Abstract

The utility model discloses a deviation rectification detection device for sludge filter-pressing filter cloth, and belongs to the field of filter cloth of a filter press. The device comprises two U-shaped sensors which move in opposite directions, filter cloth is wound to the surface of a winding roller after passing through a filter press, then the filter cloth penetrates through the two U-shaped sensors, the U-shaped sensors can continuously detect the shrinkage deformation state of the filter cloth, and meanwhile two sliding blocks for fixing the U-shaped sensors can slide in opposite directions under the action of a two-way lead screw. The bidirectional lead screw is controlled by the stepping motor, the stepping motor is controlled by the PLC control system according to the detection result of the U-shaped sensor, the position of the U-shaped sensor can be continuously changed through the stepping motor while continuous detection is conducted, and when the single side of the U-shaped sensor makes contact with the filter cloth, the U-shaped sensor can move to drive the filter cloth to move. Further, detection data of the U-shaped sensor on the other side is changed, the U-shaped sensor performs deviation rectification on the filter cloth while moving, and continuous deviation rectification of the filter cloth can be realized.

Description

Technical Field

[0001] This utility model relates to the field of filter cloth for filter presses, and in particular to a device for correcting and detecting the deviation of sludge filter cloth. Background Technology

[0002] A sludge filter press is a key piece of equipment used for solid-liquid separation. It uses filter cloth to wrap a mixture of sludge and chemicals, and then squeezes the filter cloth to remove the water inside the sludge. The sludge filter press is equipped with a filter cloth correction device, which uses sensors to detect the position of the filter cloth and automatically adjusts the guide rollers or tensioning mechanism to keep the filter cloth on the correct running trajectory.

[0003] Existing filter cloth correction devices typically use single or dual detection sensors, which are structurally fixed at the top and inside of the sludge filter press frame. The detection area of ​​the sensor is fixed after its position is fixed, detecting the position of the filter cloth within the current area. However, the shrinkage and deformation of the filter cloth during use is difficult to control, making it difficult to ensure that the filter cloth can still be detected by the sensor after multiple shrinkages. If it can only be detected by a single detection sensor, when the filter cloth shrinks, the cloth winding effect will be biased to one side of the sensor, causing subsequent cloth placement to be off-center. When the filter cloth falls out of the detection sensor's detection area, the equipment needs to be stopped for adjustment.

[0004] In summary, the detection area of ​​the detection sensor in the existing sludge filter cloth correction device is fixed. When the filter cloth leaves the detection area, the detection result will be interrupted, and the machine needs to be stopped to adjust the sensor position. Utility Model Content

[0005] This invention provides a device for correcting the deviation of filter cloth in sludge filter presses. It can solve the problem that in the prior art, the detection area of ​​the detection sensor in the filter cloth correction device of sludge filter press is fixed, and the detection result will be interrupted when the filter cloth is removed from the detection area. At this time, it is necessary to stop the machine and adjust the position of the sensor.

[0006] A device for correcting and detecting the deviation of sludge filter cloth during filter pressing, comprising:

[0007] Two bearing seats are fixedly mounted on the top of the filter press frame. A bidirectional lead screw is rotatably connected between the two bearing seats. Two nuts are threaded onto the surface of the bidirectional lead screw. A slider is detachably connected to the surface of each nut. A U-shaped sensor is detachably connected to the surface of each slider. A transmission assembly is provided between the U-shaped sensor and the bidirectional lead screw.

[0008] A take-up roller is fixedly connected to the top of the filter press frame, and the center of the U-shaped sensor is on the same horizontal line as the center of the take-up roller.

[0009] The transmission assembly includes an isolation transmitter, a stepper motor, and a PLC control system. The output end of the U-shaped sensor is connected to the input end of the isolation transmitter via a shielded cable. The output end of the isolation transmitter is connected to the input end of the PLC control system via a twisted pair or shielded cable. The output end of the PLC control system is electrically connected to the input end of the stepper motor. The end of the output shaft of the stepper motor is fixedly connected to a bidirectional lead screw.

[0010] Optionally, a straight rod is fixedly connected between the two bearing seats, and a moving groove is provided on the surface of the slider, the moving groove being adapted to the straight rod.

[0011] Optionally, a guide roller and a retaining roller are rotatably connected to the surface of the filter press frame. The guide roller and the retaining roller are arranged on both sides of the bearing seat, and the distance between the guide roller and the winding roller is greater than the distance between the retaining roller and the winding roller.

[0012] Optionally, a compression rod is slidably connected to the surface of the slider, and a compression spring is fixedly connected between the compression rod and the slider. The side of the compression rod closest to the slider contacts the U-shaped sensor.

[0013] Optionally, a limiting rod and a limiting rod are rotatably connected inside the extrusion rod. A limiting groove is formed on the surface of the limiting rod. A limiting post is rotatably connected inside the limiting rod. A limiting band is fixedly connected to the surface of the limiting post. A limiting shaft is fixedly connected to the end of the limiting band. The limiting shaft is adapted to the limiting groove.

[0014] Optionally, a cylindrical groove is formed on the surface of the limiting post, and a ring spring is fixedly connected between the cylindrical groove and the limiting rod.

[0015] Optionally, the surface of the extrusion rod is provided with a sliding groove, which is adapted to the limiting rod and the limiting rod.

[0016] Optionally, a central rod is fixedly connected to the ends of both the limiting rod and the limiting rod. The central rod extends to the side of the extrusion rod away from the slider, and the sliding groove is adapted to the central rod.

[0017] Optionally, the surface of the extrusion rod is provided with several locking grooves, and several locking rods are slidably connected inside the central rod. The locking rods are arranged in a ring array inside the central rod, and the locking rods are adapted to the locking grooves.

[0018] Optionally, a connecting spring is fixedly connected between the two symmetrical locking rods, and an operating rod is threadedly connected inside the central rod. The surface of the operating rod is in contact with the locking rod, and the cross-section of the operating rod is gourd-shaped.

[0019] This invention provides a device for correcting the deviation of filter cloth in sludge filter presses. It includes two U-shaped sensors that move in opposite directions. After passing through the filter press, the filter cloth is wound onto the surface of the winding roller and then passes through the two U-shaped sensors. The U-shaped sensors continuously detect the shrinkage and deformation of the filter cloth. Simultaneously, two sliders fixing the U-shaped sensors slide in opposite directions under the action of a bidirectional lead screw controlled by a stepper motor. The detection results of the U-shaped sensors are controlled by a PLC control system to control the stepper motor, thus continuously detecting the filter cloth while the position of the U-shaped sensors is constantly changed by the stepper motor. When one side of the U-shaped sensor contacts the filter cloth, its movement causes the filter cloth to move, thereby changing the detection data of the other side's U-shaped sensor. The U-shaped sensors correct the deviation of the filter cloth while moving, enabling uninterrupted filter cloth correction. After one side of the filter cloth detaches from a single U-shaped sensor, there is no need to stop the machine to adjust its position. The bidirectional lead screw causes the two U-shaped sensors to move in opposite directions, ensuring that both U-shaped sensors have detection values ​​and centering the filter cloth during winding. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the sludge filter press provided by this utility model;

[0021] Figure 2 A schematic diagram of the structure of a sludge filter cloth correction and detection device provided by this utility model;

[0022] Figure 3 A three-dimensional view of the slider provided by this utility model;

[0023] Figure 4 A three-dimensional sectional view of the limiting rod provided in this utility model;

[0024] Figure 5 Provided by this utility model Figure 4 Enlarged view of the local structure at point A in the middle.

[0025] Explanation of reference numerals in the attached figures:

[0026] 1. Filter press frame; 2. Bearing housing; 3. Bidirectional lead screw; 4. Nut; 5. Slider; 6. U-shaped sensor; 7. Take-up roller; 8. Stepper motor; 9. Straight rod; 10. Guide roller; 11. Holding roller; 12. Extrusion rod; 13. Extrusion spring; 14. Limiting rod; 15. Limiting rod; 16. Limiting column; 17. Limiting belt; 18. Limiting shaft; 19. Circular spring; 20. Center rod; 21. Locking rod; 22. Operating rod. Detailed Implementation

[0027] The specific embodiments of this utility model are described in detail below, but it should be understood that the protection scope of this utility model is not limited to the specific embodiments.

[0028] like Figures 1 to 5 As shown in the figure, the present invention provides a device for correcting the deviation of sludge filter cloth during filter pressing, comprising:

[0029] Two bearing seats 2 are fixedly installed on the top of the filter press frame 1. A bidirectional lead screw 3 is rotatably connected between the two bearing seats 2. Two lead screw nuts 4 are threadedly connected to the surface of the bidirectional lead screw 3. A slider 5 is detachably connected to the surface of each lead screw nut 4. A U-shaped sensor 6 is detachably connected to the surface of each slider 5. A transmission assembly is provided between the U-shaped sensor 6 and the bidirectional lead screw 3.

[0030] A take-up roller 7 is fixedly connected to the top of the filter press frame 1. Filter cloth is wound around the surface of the take-up roller 7. The center of the U-shaped sensor 6 is on the same horizontal line as the center of the take-up roller 7.

[0031] The transmission assembly includes an isolation transmitter (not shown in the figure), a stepper motor 8, and a PLC control system (not shown in the figure). The output end of the U-shaped sensor 6 is connected to the input end of the isolation transmitter via a shielded cable. The output end of the isolation transmitter is connected to the input end of the PLC control system via a twisted pair or shielded cable. The output end of the PLC control system is electrically connected to the input end of the stepper motor 8. The end of the output shaft of the stepper motor 8 is fixedly connected to the bidirectional lead screw 3.

[0032] It should be noted that the PLC control system is a complete automation control solution with PLC (Programmable Logic Controller) as the core, combined with sensors, actuators, human-machine interface, communication network, etc.; its main purpose is to realize automated monitoring, data acquisition, remote control and optimized management of the production process.

[0033] In summary, the present invention provides a sludge filter cloth correction and detection device, comprising two U-shaped sensors 6 moving in opposite directions. After passing through the filter press, the filter cloth is wound onto the surface of the winding roller 7, and then passes through the two U-shaped sensors 6. The U-shaped sensors 6 can continuously detect the shrinkage and deformation state of the filter cloth. Simultaneously, the two sliders 5 fixing the U-shaped sensors 6 can slide in opposite directions under the action of a bidirectional lead screw 3, which is controlled by a stepper motor 8. The detection results of the U-shaped sensors 6 are controlled by a PLC control system to control the stepper motor 8, thereby continuously detecting the filter cloth. Meanwhile, the position of the U-shaped sensor 6 can be continuously changed by the stepper motor 8. When one side of the U-shaped sensor 6 is in contact with the filter cloth, the movement of the U-shaped sensor 6 can drive the filter cloth to move, thereby changing the detection data of the other side of the U-shaped sensor 6. The U-shaped sensor 6 corrects the filter cloth while moving, which can realize uninterrupted filter cloth correction. After one side of the filter cloth is separated from a single U-shaped sensor 6, there is no need to stop the machine to adjust the position. The bidirectional lead screw 3 will make the two U-shaped sensors 6 move towards each other, ensuring that both U-shaped sensors 6 have detection values ​​and centered the filter cloth for winding.

[0034] In some specific implementations, a straight rod 9 is fixedly connected between the two bearing seats 2, and a moving groove is provided on the surface of the slider 5, which is adapted to the straight rod 9; the straight rod 9 can limit the movement trajectory of the slider 5 and prevent the slider 5 from deviating when it moves;

[0035] In some specific implementations, a guide roller 10 and a retaining roller 11 are rotatably connected to the surface of the filter press frame 1. The guide roller 10 and the retaining roller 11 are located on both sides of the bearing seat 2, and the distance between the guide roller 10 and the winding roller 7 is greater than the distance between the retaining roller 11 and the winding roller 7. The guide roller 10 enables the filter cloth to turn, preventing the filter cloth from directly contacting the bidirectional lead screw 3. The retaining roller 11 allows the filter cloth to be reversed again, and the guide roller 10 and the retaining roller 11 ensure that the transmission path of the filter cloth remains unchanged.

[0036] In some specific implementations, a compression rod 12 is slidably connected to the surface of the slider 5, and a compression spring 13 is fixedly connected between the compression rod 12 and the slider 5. The side of the compression rod 12 near the slider 5 contacts the U-shaped sensor 6. The U-shaped sensor 6 can be confined between the compression rod 12 and the slider 5 by the compression rod 12, so that the U-shaped sensor 6 can be quickly replaced.

[0037] In a further embodiment, the squeezing rod 12 is internally rotatably connected to the limiting rod 14 and the limiting rod 15. The limiting rod 14 has a limiting groove on its surface. The limiting rod 15 is internally rotatably connected to the limiting post 16. The limiting post 16 is fixedly connected to the surface of the limiting strip 17. The limiting strip 17 is fixedly connected to the end of the limiting shaft 18, which is adapted to the limiting groove. Through the limiting shaft 18 and the limiting groove, the limiting strip 17 can be arranged between the limiting rod 14 and the limiting rod 15. When the limiting strip 17 contacts the side of the U-shaped sensor 6 perpendicular to the slider 5, the position of the U-shaped sensor 6 can be further restricted.

[0038] In a further embodiment, a cylindrical groove is formed on the surface of the limiting post 16, and an annular spring 19 is fixedly connected between the cylindrical groove and the limiting rod 15; the annular spring 19 can quickly pull the limiting shaft 18 when it is disengaged from the limiting groove.

[0039] In a further embodiment, a sliding groove is formed on the surface of the extrusion rod 12, and a central rod 20 is fixedly connected to the ends of the limiting rod 14 and the limiting rod 15. The central rod 20 extends to the side of the extrusion rod 12 away from the slider 5, and the sliding groove is adapted to the central rod 20. The rotation center of the limiting rod 14 and the limiting rod 15 can be limited by the central rod 20, and the sliding groove can completely slide the limiting rod 14 and the limiting rod 15 into the sliding groove for storage.

[0040] In a further embodiment, the surface of the extrusion rod 12 is provided with several locking grooves, and several locking rods 21 are slidably connected inside the central rod 20. The locking rods 21 are arranged in a ring array inside the central rod 20, and the locking rods 21 are adapted to the locking grooves. A connecting spring is fixedly connected between two symmetrical locking rods 21. An operating rod 22 is threaded inside the central rod 20. The surface of the operating rod 22 is in contact with the locking rods 21, and the cross-section of the operating rod 22 is gourd-shaped.

[0041] Combination Figures 1 to 5 This utility model also provides a correction method for a sludge filter cloth correction detection device, comprising the following steps:

[0042] S1 and U-shaped sensors detect the edge signal of the filter cloth to obtain the lengths W1 and W2 of the filter cloth on two single sides. W1 and W2 are then sent to the PLC control system through an isolation transmitter.

[0043] S2, the PLC control system calculates the shrinkage rate S according to the shrinkage rate formula.

[0044]

[0045] The initial values ​​are the values ​​when the filter cloth is not in use;

[0046] S3. Compare the shrinkage rate S with the set threshold T; the threshold T is the manually measured shrinkage rate of the filter cloth.

[0047] If the shrinkage rate S is greater than the set threshold T, the PLC control system will not send a command to the stepper motor 8; if the shrinkage rate S is less than the set threshold T, proceed to the next step.

[0048] S4, the PLC control system sends instructions to the stepper motor 8, and the stepper motor 8 drives the bidirectional lead screw 3 to rotate.

[0049] The working principle of this utility model:

[0050] When the filter cloth is wound, the filter cloth passes through the guide roller 10, passes through the U-shaped sensor 6, passes through the holding roller 11, and is wound on the surface of the winding roller 7. During the winding process, the U-shaped sensor 6 detects that if the shrinkage rate S is less than the threshold T, the stepper motor 8 is started, causing the bidirectional lead screw 3 to rotate and the sliders 5 to move towards each other. The U-shaped sensor 6 monitors in real time that if the shrinkage rate S is greater than the threshold T, the bidirectional lead screw 3 stops rotating.

[0051] The above-disclosed embodiments are only a few specific examples of the present utility model. However, the embodiments of the present utility model are not limited thereto. Any changes that can be conceived by those skilled in the art should fall within the protection scope of the present utility model.

Claims

1. A device for detecting and correcting the deviation of sludge filter cloth during sludge dewatering, characterized in that, Include: Two bearing seats (2) are fixedly arranged on the top of the filter press frame (1), a bidirectional screw rod (3) is rotatably connected between the two bearing seats (2), two nut blocks (4) are threadedly connected on the surface of the bidirectional screw rod (3), a sliding block (5) is detachably connected on the surface of the nut block (4), a U-shaped sensor (6) is detachably connected on the surface of the sliding block (5), and a transmission assembly is arranged between the U-shaped sensor (6) and the bidirectional screw rod (3); The top of the filter press frame (1) is fixedly connected with a winding roller (7), and the center of the U-shaped sensor (6) is located on the same horizontal line as the center of the winding roller (7); The transmission assembly comprises an isolation transmitter, a stepping motor (8) and a PLC control system, the output end of the U-shaped sensor (6) is connected with the input end of the isolation transmitter through a shielded cable, the output end of the isolation transmitter is connected with the input end of the PLC control system through a twisted pair or shielded cable, the output end of the PLC control system is electrically connected with the input end of the stepping motor (8), and the end of the output shaft of the stepping motor (8) is fixedly connected with the bidirectional screw rod (3).

2. The deviation detecting device for filter cloth of sludge filter press according to claim 1, wherein Two straight rods (9) are fixedly connected between the two bearing seats (2), and a moving groove is formed in the surface of the sliding block (5) and matched with the straight rod (9).

3. The deviation detecting device for filter cloth of sludge filter press according to claim 1, wherein The surface of the filter press frame (1) is rotatably connected with a guide roller (10) and a retaining roller (11), the guide roller (10) and the retaining roller (11) are arranged on the two sides of the bearing seat (2), and the distance between the guide roller (10) and the winding roller (7) is greater than the distance between the retaining roller (11) and the winding roller (7).

4. The deviation detecting device for filter cloth of sludge filter press according to claim 1, wherein The surface of the sliding block (5) is slidably connected with an extrusion rod (12), the extrusion spring (13) is fixedly connected between the extrusion rod (12) and the sliding block (5), and the side of the extrusion rod (12) close to the sliding block (5) is in contact with the U-shaped sensor (6).

5. The deviation detecting device for filter cloth of sludge filter press according to claim 4, wherein The inside of the extrusion rod (12) is rotatably connected with a limiting rod (14) and a limiting rod (15), the surface of the limiting rod (14) is provided with a limiting groove, the inside of the limiting rod (15) is rotatably connected with a limiting column (16), the surface of the limiting column (16) is fixedly connected with a limiting belt (17), the end of the limiting belt (17) is fixedly connected with a limiting shaft (18), and the limiting shaft (18) is matched with the limiting groove.

6. The deviation detecting device for filter cloth of sludge filter press according to claim 5, wherein The surface of the limiting column (16) is provided with a cylindrical groove, and the annular spring (19) is fixedly connected between the cylindrical groove and the limiting rod (15).

7. The deviation detecting device for filter cloth of sludge filter press according to claim 4, wherein The surface of the extrusion rod (12) is provided with a sliding groove, and the sliding groove is matched with the limiting rod (14) and the limiting rod (15).

8. The deviation detecting device for filter cloth of sludge filter press according to claim 7, wherein The end of the limiting rod (14) and the limiting rod (15) is fixedly connected with a center rod (20), the center rod (20) extends to the side of the extrusion rod (12) away from the sliding block (5), and the sliding groove is matched with the center rod (20).

9. A deviation detecting device for a filter press cloth for sludge according to claim 8, characterized in that, The surface of the extrusion rod (12) is provided with a plurality of clamping grooves, a plurality of clamping rods (21) are slidably connected in the inside of the center rod (20), and the plurality of clamping rods (21) are arranged in an annular array in the inside of the center rod (20). The clamping rod (21) is matched with the clamping groove.

10. The deviation detecting device for filter cloth of sludge filter press according to claim 9, wherein The two symmetrical clamping rods (21) are fixedly connected with connecting springs, the central rod (20) is internally threadedly connected with an operating rod (22), the surface of the operating rod (22) is attached to the clamping rod (21), and the cross section of the operating rod (22) is in the shape of a gourd.

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