Sludge conveying device

Abstract

The utility model belongs to the technical field of sludge treatment, and particularly relates to a sludge conveying device which comprises a sludge bin, a driving mechanism and a spiral conveying mechanism, and the driving end of the driving mechanism is connected with the spiral conveying mechanism; the control system comprises a control cabinet, a first distance measuring sensor, a frequency converter and a delayer; the first distance measuring sensor is used for detecting the distance between the sludge surface in the sludge bin and the first distance measuring sensor and feeding back a first distance detection signal to the control cabinet; the control cabinet sends a frequency conversion signal to the frequency converter according to the first distance detection signal; the frequency converter provides variable-frequency power for the driving mechanism according to the variable-frequency signal; the driving mechanism controls the conveying speed of the spiral conveying mechanism according to the variable-frequency power supply; the control cabinet sends a stop signal to the delayer according to the first distance detection signal; the delayer is electrically connected with the driving mechanism and controls the driving mechanism to be closed according to the stop signal, and the service life of equipment can be prolonged.

Description

Technical Field

[0001] The utility model belongs to the technical field of sludge treatment, and particularly relates to a sludge conveying device. Background Art

[0002] Sludge transportation is an indispensable part of sewage and solid waste treatment. Currently, the sludge generated by some landfill leachate treatment plants is dehydrated and stored in sludge silos. Sludge silos can generally store 2-3 days' worth of sludge. Due to the strong odor of sludge, it is generally transported in closed pipelines. The sludge is pumped to a stainless steel pipeline via a dry sludge screw pump located at the bottom of the sludge silo, and then transported to an incinerator via the stainless steel pipeline. As a common sludge conveying equipment, the screw pump uses rotating spiral blades to move the sludge from the silo to the feed inlet of the screw pump from the feed inlet to the discharge outlet. However, in actual applications, when the amount of sludge is small or completely absent, the screw pump may continue to operate. The dry friction between the spiral blades and the inner wall of the pump casing increases significantly, resulting in increased wear on the equipment. Long-term operation can cause key components such as the spiral blades and pump casing to age rapidly, shortening the service life of the equipment. Utility Model Content

[0003] In order to solve the above technical problems, the utility model provides a sludge conveying device to solve the problem that the existing spiral conveying pump may continue to operate when the amount of sludge is small or there is no sludge at all, and the dry friction between the spiral blades and the inner wall of the pump casing increases significantly, resulting in increased wear of the equipment. Long-term operation will cause the spiral blades, pump casing and other key components to age rapidly, shortening the service life of the equipment.

[0004] The technical solution adopted by the utility model is as follows: a sludge conveying device includes a sludge silo for storing sludge;

[0005] A driving mechanism and a spiral conveying mechanism, wherein the spiral conveying mechanism is located below the sludge silo, the discharge port of the sludge silo is connected to the feed port of the spiral conveying mechanism, and the driving end of the driving mechanism is connected to the spiral conveying mechanism to drive the spiral conveying mechanism to spirally convey the sludge;

[0006] A control system comprising a control cabinet, a first distance measuring sensor, a frequency converter and a time delay device;

[0007] The driving mechanism, the first distance measuring sensor, the frequency converter and the time delay device are all electrically connected to the control cabinet;

[0008] The control cabinet further includes a mounting plate, the mounting plate being mounted at the top opening of the sludge silo, the first distance measuring sensor being mounted at the bottom of the mounting plate and being located directly above the discharge port of the sludge silo, the first distance measuring sensor being used to detect the distance between the sludge surface in the sludge silo and the first distance measuring sensor, and feeding back a first distance detection signal to the control cabinet;

[0009] The control cabinet sends a frequency conversion signal to the frequency converter according to the first distance detection signal;

[0010] The frequency converter provides a variable frequency power supply to the driving mechanism according to the frequency conversion signal;

[0011] The driving mechanism controls the conveying speed of the screw conveying mechanism according to the variable frequency power supply;

[0012] The control cabinet sends a stop signal to the delay device according to the first distance detection signal;

[0013] The time delayer is electrically connected to the driving mechanism and controls the driving mechanism to be closed according to the stop signal.

[0014] Furthermore, the spiral conveying mechanism includes a rotating shaft, a spiral blade and a pump housing, the rotating shaft is rotatably connected in the pump housing, the spiral blade is fixedly sleeved on the rotating shaft, the driving mechanism is arranged outside the pump housing, and the driving end of the driving mechanism is connected to one end of the rotating shaft;

[0015] The discharge port of the sludge silo is connected to the feed port of the pump casing;

[0016] The frequency converter provides a variable frequency power supply to the driving mechanism according to the frequency conversion signal;

[0017] The driving mechanism controls the conveying speed of the spiral blade according to the variable frequency power supply.

[0018] Furthermore, a controller is provided in the control cabinet, and the driving mechanism, the first distance measuring sensor, the frequency converter and the time delay device are all electrically connected to the controller.

[0019] Furthermore, the first ranging sensor is a first infrared ranging sensor.

[0020] Furthermore, a vibrator is provided on the outer side wall of the sludge silo.

[0021] Furthermore, it also includes a second distance measuring sensor and a feeding pipe, wherein the second distance measuring sensor is a second infrared distance measuring sensor, and the second infrared distance measuring sensor is electrically connected to the control cabinet;

[0022] The second infrared ranging sensor is fixedly mounted on the upper end of the inner side wall of the sludge silo, the feed pipe is arranged above the sludge silo, and the feed pipe is located between the first infrared ranging sensor and the second infrared ranging sensor. The second infrared ranging sensor is used to detect the horizontal distance between the sludge transported into the sludge silo by the feed pipe and the second infrared ranging sensor, and feed back a second distance detection signal to the control cabinet;

[0023] The control cabinet controls the opening and closing of the delay device according to the second distance detection signal.

[0024] Beneficial effects of the utility model:

[0025] The utility model conveys sludge in a sludge silo by cooperating with a drive mechanism and a screw conveying mechanism, and detects the distance between the sludge surface and the first distance measuring sensor through a first distance measuring sensor, thereby realizing automatic monitoring of the height of the sludge storage in the sludge silo. According to the height of the sludge storage in the sludge silo, a frequency converter is used to provide different variable frequency power supplies to the drive mechanism, and the conveying speed of the screw conveying mechanism is controlled by the drive mechanism, thereby realizing precise control of the rotation speed of the screw conveying mechanism. When the sludge storage is high, a higher rotation speed is used to ensure timely sludge transportation; when the sludge storage is low, a lower rotation speed is used to reduce dry friction between the spiral blades and the pump casing, thereby extending the service life of the equipment. When there is no sludge in the sludge silo, the controller sends a stop signal to the delay device. According to the stop signal, the delay device controls the drive mechanism to delay shutdown after a preset delay time, thereby avoiding wear and damage to the equipment caused by long-term idling. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 This is a schematic diagram of the overall structure of the first embodiment of the present invention;

[0027] Figure 2 A top view of the first embodiment of the present invention;

[0028] Figure 3 This is a schematic diagram of the overall structure of the second embodiment of the present utility model;

[0029] Figure 4 This is a partial cross-sectional view of the sludge silo and feed pipe of Example 3 of the present utility model;

[0030] The attached drawings are marked as follows:

[0031] Sludge silo 1, drive mechanism 2, screw conveying mechanism 3, rotating shaft 31, spiral blade 32, pump casing 33, control system 4, control cabinet 41, first infrared ranging sensor 42, frequency converter 43, time delay 44, mounting plate 45, vibrator 5, second infrared ranging sensor 6, feed pipe 7. DETAILED DESCRIPTION

[0032] The following embodiments of the present invention are described in further detail with reference to the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0033] In the description of this utility model, unless otherwise specified, "plurality" means two or more; the terms "upper," "lower," "left," "right," "inner," "outer," "front end," "rear end," "head," "tail," etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings and are intended solely to facilitate the description of this utility model and simplify the description. They do not indicate or imply that the devices or components referred to must have a specific direction, be constructed, or operate in a specific direction, and therefore should not be construed as limiting this utility model. Furthermore, the terms "first," "second," "third," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0034] In the description of this utility model, it should be noted that, unless otherwise specified or limited, the terms "connected" and "connection" should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integral connection; mechanical connection, electrical connection; direct connection, or indirect connection through an intermediary. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0035] Example 1:

[0036] like Figures 1 and 2 As shown, a sludge conveying device includes a sludge silo 1 for storing sludge;

[0037] The driving mechanism 2 and the spiral conveying mechanism 3, the spiral conveying mechanism 3 is located below the sludge silo 1, the discharge port of the sludge silo 1 is connected to the feed port of the spiral conveying mechanism 3, the driving end of the driving mechanism 2 is connected to the spiral conveying mechanism 3, and can drive the spiral conveying mechanism 3 to spirally convey the sludge; in this embodiment, four supporting legs are fixedly provided at the bottom of the sludge silo 1, and the four supporting legs are distributed in a circumferential array along the bottom of the sludge silo 1, so as to facilitate the support and fixing of the sludge silo 1 above the spiral conveying mechanism 3.

[0038] A control system 4, comprising a control cabinet 41, a first distance measuring sensor, a frequency converter 43 and a time delay device 44;

[0039] The driving mechanism 2, the first distance measuring sensor, the frequency converter 43 and the time delay device 44 are all electrically connected to the control cabinet 41;

[0040] The control cabinet 41 further includes a mounting plate 45, which is mounted at the top opening of the sludge silo 1. The first distance measuring sensor is mounted at the bottom of the mounting plate 45 and is located directly above the discharge port of the sludge silo 1. The first distance measuring sensor is used to detect the distance between the sludge surface in the sludge silo 1 and the first distance measuring sensor, and feed back a first distance detection signal to the control cabinet 41.

[0041] The control cabinet 41 sends a frequency conversion signal to the frequency converter 43 according to the first distance detection signal;

[0042] The frequency converter 43 provides a variable frequency power supply to the driving mechanism 2 according to the frequency conversion signal;

[0043] The driving mechanism 2 controls the conveying speed of the screw conveying mechanism 3 according to the variable frequency power supply;

[0044] The control cabinet 41 sends a stop signal to the delay device 44 according to the first distance detection signal;

[0045] The timer 44 is electrically connected to the driving mechanism 2 and controls the driving mechanism 2 to delay closing according to the stop signal.

[0046] In this embodiment, a controller is housed within the control cabinet 41. The drive mechanism 2, first distance sensor, frequency converter 43, and timer 44 are all electrically connected to the controller. The frequency converter 43 and timer 44 are both located within the control cabinet 41. In this embodiment, the controller is an Arduino MEGA microcontroller. The first distance sensor detects the distance between the sludge surface within the sludge silo 1 and the first distance sensor, and feeds a first distance detection signal back to the controller. Based on the first distance detection signal, the controller sends a variable frequency signal to the frequency converter 43. Based on the variable frequency signal, the frequency converter 43 provides variable frequency power to the drive mechanism 2. Based on the variable frequency power, the drive mechanism 2 controls the conveying speed of the screw conveyor 3. Based on the first distance detection signal, the controller sends a stop signal to the timer 44. The timer 44 is electrically connected to the drive mechanism 2 and, based on the stop signal, controls the drive mechanism 2 to shut down. In this embodiment, the model of the frequency converter 43 is FU9000M, and the small frequency converter 43 of Zhejiang Manyi Electric Co., Ltd. is adopted; the model of the time delay 44 is ST3PF, and the time delay 44 of Aomeng Electric Group Co., Ltd. is adopted.

[0047] In this embodiment, the input end of the delay device 44 is connected to the output signal of the controller. When the controller sends a stop signal to the delay device 44, the delay device 44 starts timing. After the preset delay time is reached, the output end of the delay device 44 sends a stop signal to the control circuit of the drive mechanism 2 to control the drive mechanism 2 to shut down, so that the spiral conveying mechanism 3 stops working, avoiding equipment wear and damage caused by long-term idling. In this embodiment, within the preset delay time, the spiral conveying mechanism 3 can transport all the sludge in the spiral conveying mechanism 3 to the stainless steel pipe, avoiding idling of the spiral conveying mechanism 3.

[0048] like Figure 2 As shown, as a preferred embodiment, the spiral conveying mechanism 3 includes a rotating shaft 31, a spiral blade 32, and a pump housing 33. The rotating shaft 31 is rotatably connected to the pump housing 33, and the spiral blade 32 is fixedly sleeved on the rotating shaft 31. The driving mechanism 2 is arranged outside the pump housing 33, and the driving end of the driving mechanism 2 is connected to one end of the rotating shaft 31. The discharge port of the sludge silo 1 is connected to the feed port of the pump housing 33. In this embodiment, the pump housing 33 has a hollow cylindrical structure and is arranged horizontally. The feed port of the pump housing 33 is located on the left side of the top of the pump housing 33 for communicating with the discharge port of the sludge silo 1. The discharge port of the pump housing 33 is located at the right end of the bottom of the pump housing 33 for communicating with a stainless steel pipe for transporting the sludge to the incinerator through the stainless steel pipe. Two support frames are fixedly provided at the bottom of the pump housing 33 for supporting the pump housing 33.

[0049] The discharge port of the sludge silo 1 is connected to the feed port of the pump housing 33;

[0050] The frequency converter 43 provides a variable frequency power supply to the driving mechanism 2 according to the frequency conversion signal;

[0051] The driving mechanism 2 controls the conveying speed of the spiral blade 32 according to the variable frequency power supply.

[0052] Specifically, the driving mechanism 2 includes a motor, a reducer and a coupling. The motor and the reducer are both electrically connected to the control cabinet 41. The driving end of the motor is connected to the reducer through a coupling, and the reducer is connected to the rotating shaft 31. The power source is provided by the motor. In this embodiment, a servo motor can be used. The coupling is used to connect the motor and the reducer to transmit power. The reducer is used to convert the high-speed rotation of the motor into the low-speed and high-torque required by the rotating shaft 31, thereby driving the rotating shaft 31 and the spiral blades 32 to rotate and realize the transportation of sludge. The frequency converter 43 provides a variable frequency power supply to the motor according to the variable frequency signal; the motor controls the conveying speed of the spiral blades 32 according to the variable frequency power supply.

[0053] The timer 44 sends a stop signal to the driving mechanism 2 according to the timing signal, and the driving mechanism 2 controls the spiral blade 32 to stop conveying according to the stop signal.

[0054] As a preferred embodiment, the first distance measuring sensor is a first infrared distance measuring sensor 42. In this embodiment, the model of the first infrared distance measuring sensor 42 is GP2Y0A02YK0F. The first infrared distance measuring sensor 42 uses the principle of infrared reflection to detect the distance between the sludge surface in the sludge silo 1 and the first distance measuring sensor, and feeds back a first distance detection signal to the controller. The first infrared distance measuring sensor 42 has the advantages of high sensitivity and fast response. The first infrared distance measuring sensor 42 detects the distance between the sludge surface in the sludge silo 1 and the first distance measuring sensor, thereby obtaining the height of the sludge storage in the sludge silo 1. This facilitates the controller to control the speed at which the drive mechanism 2 drives the screw conveying device to convey the sludge based on the height of the sludge storage in the sludge silo 1.

[0055] Specifically, the sludge silo 1 includes a rectangular material frame and a hopper connected from top to bottom, and the discharge port of the hopper is connected to the feed port of the pump housing 33;

[0056] The frequency conversion signal is divided into a first frequency conversion signal and a second frequency conversion signal, which correspond to the first frequency conversion power supply and the second frequency conversion power supply respectively. When the frequency converter 43 provides the first frequency conversion power supply to the driving mechanism 2, the conveying speed of the screw conveying mechanism 3 is 120 rpm; when the frequency converter 43 provides the second frequency conversion power supply to the driving mechanism 2, the conveying speed of the screw conveying mechanism 3 is 60 rpm; in this embodiment, the distance from the first infrared ranging sensor 42 to the top of the hopper is set as the first sludge storage threshold, and the distance from the first infrared ranging sensor 42 to the bottom of the hopper is set as the second sludge storage threshold; when the sludge When the distance from the sludge surface in the sludge silo 1 to the infrared sensor is less than or equal to the first sludge storage threshold, the controller sends a first frequency conversion signal to the frequency converter 43; when the distance from the sludge surface in the sludge silo 1 to the infrared sensor is greater than the first sludge storage threshold and less than the second sludge storage threshold, the controller sends a second frequency conversion signal to the frequency converter 43; when the distance from the sludge surface in the sludge silo 1 to the infrared sensor is greater than or equal to the second sludge storage threshold, the controller sends a stop signal to the delay device 44, and the delay device 44 controls the driving mechanism 2 to delay closing after a preset delay time according to the stop signal.

[0057] The frequency converter 43 provides different variable frequency power supplies to achieve precise control of the rotation speed of the screw conveying mechanism 3. When the sludge reserve in the sludge silo 1 is high (the distance from the sludge surface in the sludge silo 1 to the infrared sensor is less than or equal to the first sludge reserve threshold), a higher rotation speed (120 rpm) is used to ensure timely sludge transportation; when the sludge reserve is low (the distance from the sludge surface in the sludge silo 1 to the infrared sensor is greater than the first sludge reserve threshold and less than the second sludge reserve threshold), a lower rotation speed (60 rpm) is used, and the screw conveying mechanism 3 runs at a lower rotation speed, reducing the dry friction between the spiral blades 32 and the inner side wall of the pump casing 33, thereby reducing the wear rate of the equipment and extending the service life of the equipment; when there is no sludge in the sludge silo 1 (the distance from the sludge surface in the sludge silo 1 to the infrared sensor is greater than or equal to the second sludge reserve threshold), the controller sends a stop signal to the delay 44. According to the stop signal, the delay 44 controls the driving mechanism 2 to delay closing after a preset delay time, thereby avoiding equipment wear and damage caused by long-term idling.

[0058] Example 2:

[0059] The remaining features of the second embodiment are the same as those of the first embodiment, such as Figure 3 As shown, the difference is that in the second embodiment, a vibrator 5 is provided on the outer wall of the sludge silo 1. The vibrator 5 is electrically connected to the controller, and the controller controls the opening and closing of the vibrator 5 according to the first distance detection signal. Specifically, the vibrator 5 is provided on the outer wall of the rectangular material frame of the sludge silo 1, and two vibrators are provided, which are respectively located on the front and rear outer walls of the rectangular material frame. When the distance between the sludge surface in the sludge silo 1 and the infrared sensor is greater than the first sludge storage threshold and less than the second sludge storage threshold, the controller controls the vibrator 5 to turn on, and the vibrator 5 causes the sludge attached to the inner wall of the rectangular material frame to fall into the hopper, so that the inner wall of the rectangular material frame is not easy to accumulate sludge, which facilitates the subsequent sludge transportation. In addition, to a certain extent, the vibrator 5 can drive the hopper to vibrate, so that the small amount of sludge in the hopper is vibrated, thereby becoming looser and reducing the amount of sludge attached to the inner wall of the hopper or the spiral blades 32.

[0060] Example 3:

[0061] The remaining features of the third embodiment are the same as those of the first embodiment, such as Figure 4 As shown, the difference is that in the third embodiment, it also includes a second distance measuring sensor and a feeding pipe 7, the second distance measuring sensor is a second infrared distance measuring sensor 6, and the second infrared distance measuring sensor 6 is electrically connected to the control cabinet 41;

[0062] The second infrared ranging sensor 6 is fixedly mounted on the upper end of the inner side wall of the sludge silo 1. The feed pipe 7 is arranged above the sludge silo 1. The feed pipe 7 is located between the first infrared ranging sensor and the first infrared ranging sensor 42. Specifically, the second infrared ranging sensor 6 is fixedly mounted on the inner side wall of the left end of the sludge silo 1. The feed pipe 7 is located above the right side of the second infrared ranging sensor 6. The detection end of the second infrared ranging sensor 6 faces right and is used to detect the horizontal distance between the sludge transported into the sludge silo by the feed pipe 7 and the second infrared ranging sensor 6, and to feed back a second distance detection signal to the control cabinet 41. The control cabinet 41 controls the opening and closing of the delay device 44 according to the second distance detection signal. Specifically, the controller controls the opening and closing of the delay device 44 according to the second distance detection signal.

[0063] In this embodiment, the model of the second infrared ranging sensor 6 is GP2Y0A02YK0F. The second infrared ranging sensor 6 uses the principle of infrared reflection. The detection end of the second infrared ranging sensor 6 detects that the distance between the inner wall of the right end of the sludge silo 1 and the second infrared ranging sensor 6 is 2m. When sludge enters the feeding pipe 7, the detection end of the second infrared ranging sensor 6 detects the distance between the sludge transported to the sludge silo 1 by the right feeding pipe 7 and the second infrared ranging sensor 6. At this time, the distance detected by the second infrared ranging sensor 6 is less than 2m, and the second distance detection signal is fed back to the controller, and the controller controls the delay device 44 to open; when the feeding pipe 7 no longer feeds into the sludge silo 1, the second infrared ranging sensor 6 is turned on. The detection end of the distance sensor 6 detects the distance between the inner wall of the right end of the sludge silo 1 and the second infrared ranging sensor 6. At this time, the distance detected by the second infrared ranging sensor 6 is equal to 2m, and the second distance detection signal is fed back to the controller, and the controller controls the delay 44 to close; by setting the second infrared ranging sensor 6 to detect whether there is feeding in the sludge silo 1, the delay 44 is started in time when the feeding is finished, and the screw conveying pump is turned off within the preset time, it can be avoided that when there is no sludge feeding, the screw conveying mechanism 3 continues to run and is in an idling state, and it can also be avoided that when the feeding is still continuing above the sludge silo 1, the delay 44 has been started and closed, resulting in the sludge not being transported through the screw conveying mechanism 3 in time.

[0064] The above describes the present invention in detail. The description of the specific embodiments is intended only to facilitate understanding of the method and core concept of the present invention. It should be noted that those skilled in the art may make various improvements and modifications to the present invention without departing from the principles of the present invention, and such improvements and modifications also fall within the scope of protection of the claims of the present invention.

Claims

1. A sludge conveying device, characterized in that: include A sludge silo (1) for storing sludge; A driving mechanism (2) and a spiral conveying mechanism (3), wherein the spiral conveying mechanism (3) is located below the sludge silo (1), the discharge port of the sludge silo (1) is connected to the feed port of the spiral conveying mechanism (3), and the driving end of the driving mechanism (2) is connected to the spiral conveying mechanism (3) and can drive the spiral conveying mechanism (3) to spirally convey the sludge; A control system (4), the control system (4) comprising a control cabinet (41), a first distance measuring sensor, a frequency converter (43) and a time delay device (44); The driving mechanism (2), the first distance measuring sensor, the frequency converter (43) and the time delay device (44) are all electrically connected to the control cabinet (41); The device further comprises a mounting plate (45), the mounting plate (45) being mounted at the top opening of the sludge silo (1), the first distance measuring sensor being mounted at the bottom of the mounting plate (45) and being located directly above the discharge port of the sludge silo (1), the first distance measuring sensor being used to detect the distance between the sludge surface in the sludge silo (1) and the first distance measuring sensor, and feeding back a first distance detection signal to the control cabinet (41); The control cabinet (41) sends a frequency conversion signal to the frequency converter (43) according to the first distance detection signal; The frequency converter (43) provides a variable frequency power supply to the driving mechanism (2) according to the frequency conversion signal; The driving mechanism (2) controls the conveying speed of the screw conveying mechanism (3) according to the variable frequency power supply; The control cabinet (41) sends a stop signal to the delay device (44) according to the first distance detection signal; The time delay device (44) is electrically connected to the driving mechanism (2) and controls the driving mechanism (2) to be closed according to the stop signal.

2. A sludge conveying device according to claim 1, characterized in that: The spiral conveying mechanism (3) comprises a rotating shaft (31), a spiral blade (32) and a pump housing (33); the rotating shaft (31) is rotatably connected to the pump housing (33); the spiral blade (32) is fixedly sleeved on the rotating shaft (31); the driving mechanism (2) is arranged outside the pump housing (33); and the driving end of the driving mechanism (2) is connected to one end of the rotating shaft (31); The discharge port of the sludge silo (1) is in communication with the feed port of the pump housing (33); The frequency converter (43) provides a variable frequency power supply to the driving mechanism (2) according to the frequency conversion signal; The driving mechanism (2) controls the conveying speed of the spiral blade (32) according to the variable frequency power supply.

3. A sludge conveying device according to claim 1, characterized in that: A controller is provided in the control cabinet (41), and the driving mechanism (2), the first distance measuring sensor, the frequency converter (43) and the time delay device (44) are all electrically connected to the controller.

4. A sludge conveying device according to claim 1, characterized in that: The first distance measuring sensor is a first infrared distance measuring sensor (42).

5. The sludge conveying device according to claim 1, characterized in that: A vibrator (5) is provided on the outer side wall of the sludge silo (1).

6. The sludge conveying device according to claim 1, characterized in that: It also includes a second distance measuring sensor and a feeding pipe (7), wherein the second distance measuring sensor is a second infrared distance measuring sensor (6), and the second infrared distance measuring sensor (6) is electrically connected to the control cabinet (41); The second infrared distance measuring sensor (6) is fixedly mounted on the upper end of the inner side wall of the sludge silo (1), the feed pipe (7) is arranged above the sludge silo (1), and the feed pipe (7) is located between the first infrared distance measuring sensor (42) and the second infrared distance measuring sensor (6). The second infrared distance measuring sensor (6) is used to detect the horizontal distance between the sludge transported to the sludge silo by the feed pipe (7) and the second infrared distance measuring sensor (6), and to feed back a second distance detection signal to the control cabinet (41); The control cabinet (41) controls the opening and closing of the delay device (44) according to the second distance detection signal.

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