Anti-blocking detection device for screw conveyer

Abstract

The utility model discloses an anti-blocking detection device for a spiral conveyer, which is applied to the technical field of anti-blocking detection devices for spiral conveyors, and is characterized in that the anti-blocking detection device comprises a shell, and a spiral body and a driving motor for driving the spiral body to rotate are rotatably connected in the shell; a plurality of signal magnetic poles are fixedly arranged on the side wall, attached to the inner wall of the shell, of the spiral body at intervals, and a magnetic control proximity switch matched with the signal magnetic poles is fixedly connected to the shell. When the spiral body drives the signal magnetic pole to rotate to the position of the magnetic control proximity switch, the magnetic control proximity switch generates an on-off signal and transmits the on-off signal to a central control system, and the frequency of the on-off signal is consistent with the rotating frequency of the spiral body; the device has the advantages of being simple in structure, low in cost and capable of early warning equipment faults in time, and the maintenance cost of the equipment and a production line is greatly reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of anti-blocking detection devices for screw conveyors, in particular to an anti-blocking detection device for screw conveyors. Background Art

[0002] The process of solid hazardous waste disposal includes early crushing, spiral feeding and incineration. When the spiral shaft rotates, due to the gravity of the material and the friction between the material and the wall of the trough, the material can only move from the inlet to the outlet along the bottom of the conveyor trough under the push of the blades. However, when the pre-treatment effect of the solid hazardous waste by the early crusher is not good, the spiral feeding device is prone to blockage when conveying materials, especially at the spiral overlap. In severe cases, it causes the spiral body to break and the motor and other equipment to be damaged. Therefore, a device for real-time detection of the normal operation of the screw conveyor is needed, which can be shut down in time after a fault occurs to prevent losses. At present, the conventional method is to detect the current of the screw conveyor motor, and judge whether it is abnormal by monitoring the current value. This method has low accuracy because the current fluctuation is not large, and the current has normal fluctuations during the conveying process itself, so there are many misjudgments. Another method is to detect whether the output shaft is rotating, and detect the rotation of the shaft through a photoelectric or mechanical contact switch. Once the spiral body breaks, the shaft is still rotating in this way, and it is also impossible to avoid misjudgment.

[0003] At present, a Chinese utility model with announcement number CN215591782U discloses a horizontal screw conveyor, including a casing, a protective device is arranged at the other end of the casing, the protective device includes a push baffle, a connecting rod fixed on one end face of the push baffle, a limit guide tube and a limit switch, the limit guide tube is fixedly arranged on the outside of one end face of the casing and is connected with the inside of the casing, the limit switch is arranged at the end of the limit guide tube away from the casing, the push baffle is arranged inside the casing, the connecting rod on the push baffle extends to the outside of the casing, the end of the connecting rod extending to the outside of the casing is arranged perpendicular to the top of the limit switch, and the signal output end of the limit switch and the signal receiving end of the drive motor are electrically connected to the signal control device.

[0004] The existing utility model is provided with a protective device at one end of the casing near the discharge port to prevent blockage inside the casing. When solid hazardous waste appears in the casing and the inside of the casing is filled, the pushing baffle is squeezed to slide in the direction close to the limit switch. At this time, the connecting rod connected to the pushing baffle follows the sliding until the end of the connecting rod hits the top of the limit switch and triggers the limit switch. The limit switch transmits the signal to the signal control device to control the drive motor to stop working, thereby stopping the horizontal screw conveyor from feeding. However, there is a certain period of time between the blockage in the casing and the stop of the horizontal screw conveyor. During this period, the drive motor is always in working state, which may cause the spiral body to break and the drive motor and other equipment to be damaged, so there is a need for improvement. Utility Model Content

[0005] The utility model aims to provide a screw conveyor anti-blocking detection device, which has the advantages of simple structure, low cost, and can timely warn of equipment failure, greatly reducing the maintenance cost of the equipment and the production line.

[0006] The above technical purpose of the utility model is achieved through the following technical solutions: a screw conveyor anti-blocking detection device, including a shell, a spiral body and a driving motor for driving the spiral body to rotate are rotatably connected in the shell; a plurality of signal poles are fixedly arranged at intervals on the side walls of the spiral body that are in contact with the inner wall of the shell, and a magnetically controlled proximity switch that cooperates with the signal pole is fixedly connected to the shell. When the spiral body drives the signal pole to rotate to the position of the magnetically controlled proximity switch, the magnetically controlled proximity switch generates an on-off signal and transmits it to the central control system, and the on-off signal frequency is consistent with the rotation frequency of the spiral body.

[0007] The utility model is further configured as follows: the shell is composed of a plurality of coaxially arranged sub-shells.

[0008] The utility model is further configured as follows: the sub-shell includes a first shell and a second shell symmetrically arranged coaxially, flanges are symmetrically fixed at both ends of the first shell and the second shell, a plurality of first flange holes are evenly opened on the flange, and a flange block is fixed on one side where the first shell and the second shell are in contact, a plurality of second flange holes are evenly opened on the flange block along a direction parallel to the conveying direction, and the first shell and the second shell and adjacent sub-shells are fixed based on bolt connection.

[0009] The utility model is further configured as follows: a sealing gasket is provided between adjacent flange plates and flange blocks.

[0010] The utility model is further configured as follows: the length of the sub-shell is not less than twice the lead of the spiral body and not more than four times the lead of the spiral body.

[0011] The utility model is further configured as follows: a mounting hole for mounting the signal magnetic pole is opened on the spiral body, and a closing gasket for sealing the signal magnetic pole in the mounting hole to avoid contacting the inner wall of the shell is arranged in the mounting hole.

[0012] In summary, the utility model has the following beneficial effects:

[0013] 1. By arranging signal magnetic poles at the side wall intervals where the spiral body and the inner wall of the shell are in contact, and arranging a magnetic control proximity switch that matches the signal magnetic poles on the shell, when the spiral body rotates, the signal magnetic poles are driven to rotate together. During the rotation process, the magnetic control switch senses the signal magnetic poles and generates an on-off signal and transmits it to the central control system. The frequency of the on-off signal is consistent with the frequency of the spiral body rotation. The central control system continuously picks up the on-off signal of the magnetic control proximity switch to determine whether the screw conveyor is operating normally. When material blockage occurs and an abnormality occurs, the spiral body stops rotating. The magnetic control proximity switch does not send an on-off signal to the central control system within a rotation cycle. At this time, the central control system alarms and controls the drive motor to stop rotating to avoid material accumulation and blocking the equipment, and avoid damage to the spiral body and the drive equipment. The structure is simple, the cost is low, and the maintenance cost of the equipment and the production line is reduced;

[0014] 2. The shell is composed of a plurality of coaxially arranged sub-shells, and the sub-shells are composed of a first shell and a second shell that are coaxially symmetrically arranged, and adjacent sub-shells are connected based on flanges, and adjacent first shells and second shells are connected based on flange blocks. When blockage occurs, maintenance can be carried out by separating the first shell and the second shell, and the blockage position can be located by adjusting the position of the signal magnetic pole on the spiral body, so that the blocked position can be quickly cleaned, thereby improving maintenance efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the overall structure explosion of this embodiment;

[0016] Figure 2 yes Figure 1 An enlarged schematic diagram of part A.

[0017] Figure numerals: 1, housing; 11, sub-housing; 12, first housing; 13, second housing; 14, flange; 15, first flange hole; 16, flange block; 17, second flange hole; 18, bolt; 19, sealing gasket; 2, spiral body; 3, signal magnetic pole; 4, magnetically controlled proximity switch. DETAILED DESCRIPTION

[0018] The utility model is further described in detail below in conjunction with the accompanying drawings.

[0019] Example:

[0020] refer to Figure 1 and Figure 2, a screw conveyor anti-blocking detection device comprises a shell 1, a screw body 2 and a driving motor for driving the screw body 2 to rotate are rotatably connected in the shell 1, and a rotation cycle of the screw body 2 is 360 degrees, and a plurality of signal magnetic poles 3 are fixedly provided at intervals between the side walls of the screw body 2 and the inner wall of the shell 1, and a magnetic control proximity switch 4 cooperating with the signal magnetic pole 3 is fixedly connected to the shell 1. When the screw body 2 drives the signal magnetic pole 3 to rotate to the position of the magnetic control proximity switch 4, the magnetic control proximity switch 4 generates an on-off signal and transmits it to the central control system. The frequency of the on-off signal is consistent with the rotation frequency of the screw body 2. When the screw body 2 rotates, it drives the signal magnetic pole 3 to rotate together. During the rotation process, the magnetic control switch senses the signal magnetic pole 3 and generates an on-off signal and transmits it to the central control system. The frequency of the on-off signal is consistent with the rotation frequency of the screw body 2. The central control system judges whether the screw conveyor is operating normally by continuously picking up the on-off signal of the magnetic control proximity switch 4. When blockage occurs and an abnormality occurs, the screw body 2 stops rotating. , the magnetically controlled proximity switch 4 does not send an on-off signal to the central control system within a rotation cycle, the central control system alarms and controls the drive motor to stop rotating to avoid material accumulation and blocking the equipment, and avoid damage to the spiral body 2 and the drive equipment, etc. At the same time, the position of the signal magnetic pole 3 on the spiral body 2 can be adjusted to achieve the preliminary positioning of the blocking position. For example, the spiral body 2 can be regarded as composed of a plurality of sub-spirals 2, the length of each sub-spiral 2 is equal to the lead of the spiral body 2, and the rotation state of each sub-spiral 2 is the same when the spiral body 2 rotates. The signal magnetic pole 3 is arranged on each sub-spiral 2 in turn according to the rotation direction of the spiral body 2. When the spiral body 2 rotates, the signal magnetic pole 3 on each sub-spiral 2 passes through the magnetically controlled proximity switch 4 in turn, and the central control system receives the on-off signal of each magnetically controlled proximity switch 4 in turn. If a blockage occurs at a certain moment, the magnetically controlled proximity switches 4 in front of the blocking point have all sent on-off signals. Then, the first position where the on-off signal is not sent is the position of the blocking point.

[0021] refer to Figure 1Specifically, the housing 1 is composed of several coaxially arranged sub-housings 11. The sub-housings 11 include a first housing 12 and a second housing 13 that are coaxially symmetrically arranged. Flanges 14 are symmetrically fixed at both ends of the first housing 12 and the second housing 13. Several first flange holes 15 are evenly opened on the flange 14. At the same time, a flange block 16 is fixed on one side where the first housing 12 and the second housing 13 are attached. Several second flange holes 17 are evenly opened on the flange block 16 along the conveying direction. The first housing 12 and the second housing 13, and the adjacent sub-housings 11 are connected and fixed by bolts 18. Sealing gaskets 19 are arranged between adjacent flanges 14 and flange blocks 16 to ensure sealing. When the location of the blockage point is determined, the first housing 1 and the second housing 1 at the corresponding position can be disassembled to quickly clean the blockage position, thereby improving the efficiency of maintenance. In this embodiment, the length of the sub-shell 11 is not less than twice the lead of the spiral body 2 and not more than four times the lead of the spiral body 2, so that when a blockage occurs, only one sub-shell 11 needs to be removed to clean the blocked position, which can also reduce the difficulty of installation.

[0022] Specifically, a mounting hole for mounting the signal magnetic pole 3 is opened on the spiral body 2, and a closing gasket is provided in the mounting hole for sealing the signal magnetic pole 3 in the mounting hole to avoid contact with the inner wall of the shell 1. By fixing the signal magnetic pole 3 in the mounting hole and closing the mounting hole with the closing gasket, the signal magnetic pole 3 can be prevented from being polluted by impurities.

[0023] Brief description of the use process: When the spiral body 2 rotates, it drives the signal magnetic pole 3 to rotate together. During the rotation process, the magnetic control switch senses the signal magnetic pole 3 and generates an on-off signal and transmits it to the central control system. The central control system continuously picks up the on-off signal of the magnetic control proximity switch 4 to determine whether the screw conveyor is operating normally. When blockage occurs and an abnormality occurs, the spiral body 2 stops rotating. The magnetic control proximity switch 4 does not send an on-off signal to the central control system within a rotation cycle. At this time, the central control system alarms and controls the drive motor to stop rotating.

[0024] This specific embodiment is merely an explanation of the present invention and is not a limitation of the present invention. After reading this specification, those skilled in the art may make creative modifications to the present embodiment as needed, but as long as they are within the scope of the claims of the present invention, they are protected by patent law.

Claims

1. A screw conveyor anti-blocking detection device, comprising a housing (1), a screw body (2) rotatably connected inside the housing (1) and a driving motor for driving the screw body (2) to rotate; characterized in that: A plurality of signal magnetic poles (3) are fixedly arranged at intervals on the side wall of the spiral body (2) that is in contact with the inner wall of the shell (1); a magnetically controlled proximity switch (4) that cooperates with the signal magnetic poles (3) is fixedly connected to the shell (1); when the spiral body (2) drives the signal magnetic poles (3) to rotate to the position of the magnetically controlled proximity switch (4), the magnetically controlled proximity switch (4) generates an on-off signal and transmits it to the central control system; the frequency of the on-off signal is consistent with the rotation frequency of the spiral body (2).

2. A screw conveyor anti-blocking detection device according to claim 1, characterized in that: The housing (1) is composed of a plurality of coaxially arranged sub-housings (11).

3. The anti-blocking detection device for a screw conveyor according to claim 2, characterized in that: The sub-shell (11) comprises a first shell (12) and a second shell (13) which are symmetrically arranged coaxially, flanges (14) are symmetrically fixed at both ends of the first shell (12) and the second shell (13), a plurality of first flange holes (15) are evenly provided on the flange (14), and a flange block (16) is fixed on one side where the first shell (12) and the second shell (13) are in contact, a plurality of second flange holes (17) are evenly provided on the flange block (16) along a direction parallel to the conveying direction, and the first shell (12) and the second shell (13) and the adjacent sub-shells (11) are connected and fixed by bolts (18).

4. The anti-blocking detection device for a screw conveyor according to claim 3 is characterized in that: A sealing gasket (19) is provided between adjacent flange plates (14) and flange blocks (16).

5. The anti-blocking detection device for a screw conveyor according to claim 2, characterized in that: The length of the sub-shell (11) is not less than twice the lead of the spiral body (2) and not more than four times the lead of the spiral body (2).

6. The anti-blocking detection device for a screw conveyor according to claim 1, characterized in that: The spiral body (2) is provided with a mounting hole for mounting the signal magnetic pole (3), and a sealing gasket is provided in the mounting hole for sealing the signal magnetic pole (3) in the mounting hole so as to avoid contact with the inner wall of the housing (1).

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