A sewage inlet clogging detection device and detection method

Abstract

The application discloses a sewage inlet blockage detection device and method, and belongs to the technical field of sewage treatment equipment. The device comprises two detection tubes, a fixing frame, a guide rod, a guide ring, a filter screen, a traction structure, a control unit and an alarm unit. The detection tubes are respectively located on the two sides of a grid slag removal machine, and one end of each detection tube is provided with a liquid level meter; the filter screen is connected with the guide rod through the guide ring and is used for filtering sewage; the control unit receives the liquid level meter signal and calculates the liquid level difference, and controls the alarm unit to alarm when the liquid level difference exceeds a preset value; and the traction structure is used for replacing the filter screen. The method uses the above device, and comprises the steps of installation, detection, calculation, alarm and filter screen replacement. The application can accurately detect the blockage condition in real time, prevents the detection tube from being blocked, facilitates the replacement of the filter screen, improves the sewage treatment efficiency, has a simple structure and high adaptability.

Description

A device and method for detecting blockage at a sewage inlet Technical Field

[0001] This invention relates to the field of wastewater treatment equipment technology, and in particular to a wastewater inlet blockage detection device and detection method. Background Technology

[0002] In the wastewater treatment process, the wastewater inlet is a crucial component of the system, and its unobstructed flow directly impacts the efficiency of the entire process. Wastewater contains a large amount of debris, such as plastic bags, branches, and fibers, which easily accumulate at the inlet, causing blockages in the bar screen.

[0003] Currently, the detection of blockages in sewage inlets is mostly done through manual inspections. This method is not only inefficient, but also makes it difficult to monitor the blockage in real time. Often, the blockage is only discovered when it is quite serious, which affects the normal operation of sewage treatment.

[0004] Some existing automatic detection devices lack effective filtration structures, making their detection tubes prone to clogging by debris in wastewater. This leads to reduced detection accuracy or even malfunction. Furthermore, replacing the filters in these devices is inconvenient, increasing maintenance costs and workload. In addition, some detection devices have inaccurate liquid level detection and unresponsive alarm mechanisms, failing to promptly alert staff for appropriate actions. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention provides a sewage inlet blockage detection device and method, aiming to solve the problems of untimely and inaccurate detection, easy blockage of detection tubes, inconvenient filter replacement, complex device structure, and high maintenance costs in existing technologies.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A sewage inlet blockage detection device, comprising:

[0008] There are two detection tubes, located on both sides of the slag removal machine at the sewage inlet. One end of the detection tube is submerged in the sewage with its opening facing upwards, and the other end is equipped with a level gauge to obtain the height of the liquid level in the detection tube.

[0009] A fixed frame is fixedly installed at the end of the detection tube that is submerged in water. A guide rod is fixedly connected to the fixed frame in parallel. A guide ring is slidably connected to the guide rod. A filter screen is fixedly connected to the guide ring. The filter screen is used to filter the sewage entering the detection tube.

[0010] A traction mechanism is used to lift and replace the filter screen;

[0011] The control unit is electrically connected to each of the two level gauges and is used to receive the liquid level height signals detected by the two level gauges and calculate the liquid level difference between them.

[0012] An alarm unit is electrically connected to the control unit. When the liquid level difference calculated by the control unit exceeds a preset value, the control unit controls the alarm unit to issue an alarm signal.

[0013] Furthermore, the guide ring and filter screen are arranged in several parallel rows covering the water inlet of the detection tube.

[0014] Furthermore, the filter screen is configured in an inverted cup shape, with the screens nested together.

[0015] Furthermore, the traction structure includes a magnet and a rope, the magnet being used to attract a filter screen made of ferritic stainless steel.

[0016] Furthermore, the traction device includes a gravity block, a pull rope, and a buckle structure. The gravity block is slidably connected to the guide rod, the pull rope is fixedly connected to the upper surface of the gravity block, and a retaining ring is fixedly connected to the top of the filter screen. The buckle structure is used to engage with the retaining ring to pull up the filter screen.

[0017] Furthermore, the buckle structure includes two fixed rods, a locking rod, and a spring. The fixed rods are fixed to the bottom surface of the gravity block, and the locking rods are hinged to the ends of the corresponding fixed rods, allowing the two locking rods to rotate toward the gravity block. One end of the spring is fixed to the fixed rod, and the other end is fixed to the locking rod, so that the two locking rods close again.

[0018] Furthermore, the lever is designed in an arc shape that arches towards the gravity block, for easy engagement with the filter screen's retaining ring.

[0019] Furthermore, a support rod is fixedly connected to the fixing frame, and a barrier is fixedly connected to the support rod. The barrier surrounds the outside of the water inlet of the detection tube and extends out of the water surface.

[0020] Furthermore, the detection tube is configured as a U-shaped tube, and the level gauge uses an ultrasonic level sensor.

[0021] The present invention also provides a method for detecting blockage at a sewage inlet, using the detection device described above, comprising the following steps:

[0022] S1. Set two detection tubes on both sides of the wastewater inlet screen cleaner, with one end of the detection tube submerged in the wastewater and the opening facing upwards, and install a level gauge on the other end; fix a guide rod arranged in parallel on the submerged end of the detection tube through a fixing bracket, slide a guide ring on the guide rod, and fix a filter screen on the guide ring to filter the wastewater entering the detection tube; if a support rod and a barrier are provided, fix the support rod to the fixing bracket, so that the barrier surrounds the outside of the inlet of the detection tube through the support rod and extends out of the water surface;

[0023] S2. Use two level gauges to detect the liquid level in the corresponding detection tube. If the detection tube is a U-shaped tube and the level gauge uses an ultrasonic level sensor, then the liquid level in the U-shaped tube is detected by the ultrasonic level sensor, and the detected liquid level signal is transmitted to the control unit.

[0024] S3. The control unit receives the liquid level height signals transmitted by the two liquid level gauges and calculates the liquid level difference between them.

[0025] S4. When the liquid level difference calculated by the control unit exceeds the preset value, the control unit controls the alarm unit electrically connected to it to issue an alarm signal.

[0026] S5. When the filter needs to be replaced, the filter is lifted by the traction structure. If the traction structure includes a magnet and a rope, the magnet is used to attract the filter made of ferritic stainless steel and the filter is lifted by the rope. If the traction structure includes a gravity block, a pull rope and a buckle structure, the gravity block that is slidably connected to the guide rod is pulled by the pull rope. The end of the fixed rod on the bottom surface of the gravity block is hinged to the buckle, which is engaged with the buckle ring on the top of the filter under the action of the spring, thereby lifting the filter. The buckle is designed to be an arc shape that arches towards the gravity block for easy engagement.

[0027] Compared with the prior art, the present invention has the following beneficial effects:

[0028] 1. This invention installs detection pipes on both sides of the slag removal machine at the sewage inlet, uses a level gauge to detect the liquid level height, and a control unit to calculate the liquid level difference. When the difference exceeds a preset value, an alarm is triggered, which can detect the blockage of the sewage inlet in real time and accurately, making it convenient for staff to handle in a timely manner and improving sewage treatment efficiency.

[0029] 2. A filter screen is installed at the inlet of the detection tube, which can effectively filter impurities in the sewage, prevent the detection tube from clogging, ensure the stability and accuracy of the detection work, and reduce the maintenance work caused by the blockage of the detection tube;

[0030] 3. The traction structure facilitates the lifting and replacement of the filter screen, reducing maintenance difficulty and workload, and saving maintenance costs;

[0031] 4. The overall device has a simple structure, reasonable coordination of components, convenient operation, and strong adaptability. It can be widely used for the detection of blockages in various sewage inlets. Attached Figure Description

[0032] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0033] Figure 1 is a schematic diagram of the main view structure of an embodiment of the present invention;

[0034] Figure 2 is a schematic diagram of the gravity block structure according to an embodiment of the present invention;

[0035] Figure 3 is a schematic diagram of the enlarged structure of node A in Figure 2.

[0036] In the above attached figures: 1. Detection tube; 2. Level gauge; 3. Fixing frame; 4. Guide rod; 5. Guide ring; 6. Filter screen; 7. Gravity block; 8. Pull rope; 9. Clamping ring; 10. Buckle structure; 10. Fixing rod; 101. Clamping rod; 102. Spring; 103. Support rod; 11. Enclosure; 12. Detailed Implementation

[0037] The technical solutions of the present invention will be further described below with reference to the accompanying drawings and embodiments.

[0038] Example 1

[0039] As shown in Figures 1-3, this embodiment of the invention proposes a sewage inlet blockage detection device, which includes two detection tubes 1, a fixing frame 3, a guide rod 4, a guide ring 5, a filter screen 6, a traction structure, a control unit, and an alarm unit.

[0040] The detection tube 1 is a PVC U-shaped tube with a diameter of 100mm. It is installed 50cm on both sides of the sewage inlet screen and slag remover. One end of the detection tube 1 is submerged in the sewage for 30cm with the opening facing upwards, and the other end extends about 2m out of the water surface and is equipped with an ultrasonic level sensor of model ULS-500. This sensor has a measurement range of 0-5m and an accuracy of ±0.5%FS, and can accurately detect the liquid level in the tube 1.

[0041] The mounting bracket 3 is made of 304 stainless steel and is fixed to the outer wall of the end of the detection tube 1 that is submerged in water by bonding. Three stainless steel guide rods 4 with a diameter of 10mm are welded on the mounting bracket 3. The guide rods 4 are spaced 20cm apart and are set in parallel perpendicular to the water surface.

[0042] The guide ring 5 is made of wear-resistant nylon and is slidably connected to the guide rod 4 with a clearance fit. A 100-mesh stainless steel filter screen 6 is fixed to each guide ring 5 by bolts. The filter screen 6 completely covers the water inlet of the detection tube 1.

[0043] The traction structure uses an 8mm diameter nylon rope to connect a 50mm diameter neodymium iron boron magnet, which attracts the ferritic stainless steel filter screen 6.

[0044] The control unit is a Siemens S7-1200 PLC, which is connected to two level gauges 2 via signal cables. The PLC has a preset liquid level difference threshold of 5cm.

[0045] The alarm unit is an AC220V audible and visual alarm, which is connected to the digital output terminal of the PLC.

[0046] The ultrasonic level sensor detects the liquid level every 10 seconds and transmits a 4-20mA current signal to the PLC. The PLC calculates the liquid level difference between the two sides. When the bar screen is blocked, the liquid level in the upstream detection pipe 1 rises. When the height difference exceeds 5cm, the PLC triggers the alarm to emit an audible and visual signal. After the filter screen 6 is blocked, it can be replaced by pulling the nylon rope by using a magnet to attract the filter screen 6.

[0047] Example 2

[0048] The number of filter screens 6 is increased based on the basic embodiment 1: each detection tube 1 corresponds to 5 guide rings 5 ​​and filter screens 6. The filter screens 6 are inverted cup-shaped and made of 100-mesh stainless steel. The overlap depth of adjacent filter screens 6 is 30mm, and they are arranged side by side to cover the water inlet. When the surface filter screen 6 is clogged, the individual filter screens 6 are lifted sequentially by the traction structure for cleaning, extending the replacement cycle and allowing the filter screen 6 replacement device to work continuously.

[0049] Example 3

[0050] In the basic embodiment, the gravity block 7 is made of cast iron, weighs 2kg, and is slidably sleeved on the guide rod 4. A pull ring is welded to its upper surface to connect to a 5mm diameter steel wire rope 8. A 60mm diameter stainless steel retaining ring 9 is welded to the top of the filter screen 6. The buckle structure 10 includes two stainless steel fixing rods 101 fixed to the bottom surface of the gravity block 7. The ends of the fixing rods 101 are hinged to arc-shaped retaining rods 102. A 1mm diameter stainless steel spring 103 with an initial tension of 5N connects the retaining rods 102 and the fixing rods 101. When the steel wire rope is pulled to lower the gravity block 7, the retaining rod 102 contacts the retaining ring 9 and rotates inward. After passing the retaining ring 9, it resets under the action of the spring 103, achieving the snap-fit, thereby pulling up the uppermost sealing filter screen 6.

[0051] Example 4

[0052] Two or four 10cm long stainless steel support rods 11 with a diameter of 12mm are welded onto the fixed frame 3. The top of the support rods 11 is connected to a 30cm high polyethylene enclosure 12 with a thickness of 3mm. The enclosure 12 forms a circular protective area with a diameter of 50cm, which encloses the water inlet of the detection tube 1 and extends 10cm beyond the water surface. This is used to reduce the water surface ripples above the water inlet of the detection tube 1, reduce the influence of water pressure on the water surface of the detection tube 1, and improve the detection accuracy and precision.

[0053] Example 5

[0054] The present invention also provides a method for detecting blockage at a sewage inlet, using the detection device described above, comprising the following steps:

[0055] S1. Two detection tubes 1 are respectively set on both sides of the sewage inlet screen slag remover, so that one end of the detection tube 1 is submerged in the sewage with the opening facing upward, and the other end is equipped with a level gauge 2; a guide rod 4 arranged in parallel is fixed to the submerged end of the detection tube 1 through a fixing frame 3, a guide ring 5 is slidably connected to the guide rod 4, and a filter screen 6 is fixedly connected to the guide ring 5 to filter the sewage entering the detection tube 1. If a support rod 11 and a barrier 12 are provided, the support rod 11 is fixed to the fixing frame 3, so that the barrier 12 is enclosed outside the inlet of the detection tube 1 through the support rod 11 and extends out of the water surface;

[0056] S2. Use two level gauges 2 to detect the liquid level in the corresponding detection tube 1 respectively. If the detection tube 1 is a U-shaped tube and the level gauge 2 is an ultrasonic level sensor, then the liquid level in the U-shaped tube is detected by the ultrasonic level sensor and the detected liquid level signal is transmitted to the control unit.

[0057] S3. The control unit receives the liquid level height signals transmitted by the two liquid level gauges 2 and calculates the liquid level difference between them.

[0058] S4. When the liquid level difference calculated by the control unit exceeds the preset value, the control unit controls the alarm unit electrically connected to it to issue an alarm signal.

[0059] S5. When the filter screen 6 needs to be replaced, the filter screen 6 is lifted by the traction structure for replacement. If the traction structure includes a magnet and a rope, the filter screen 6 made of ferritic stainless steel is attracted by the magnet and lifted by the rope. If the traction structure includes a gravity block 7, a pull rope 8 and a buckle structure 10, the gravity block 7, which is slidably connected to the guide rod 4, is pulled by the pull rope 8. The end of the fixed rod 101 on the bottom surface of the gravity block 7 is connected to the buckle 102 by the hinge. Under the action of the spring 103, the buckle 102 engages with the buckle ring 9 on the top of the filter screen 6, thereby lifting the filter screen 6. The buckle 102 is designed to be an arc shape that arches towards the gravity block 7 for easy engagement.

[0060] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A sewage inlet blockage detection device, characterized in that, include: Two detection tubes are installed, located on either side of the wastewater inlet screen cleaner. One end of each detection tube is submerged in the wastewater with its opening facing upwards, while the other end is equipped with a level gauge to obtain the liquid level inside the detection tube. A mounting bracket is fixedly installed at the submerged end of the detection tube. Parallel guide rods are fixedly connected to the bracket, and guide rings are slidably connected to the guide rods. A filter screen is fixedly connected to the guide rings to filter the wastewater entering the detection tube. A traction structure is used to lift and replace the filter screen. A control unit is electrically connected to each of the two level gauges to receive the liquid level signals detected by the two gauges and calculate the difference in liquid level between them. An alarm unit is electrically connected to the control unit and, when… When the liquid level difference calculated by the control unit exceeds a preset value, the control unit controls the alarm unit to issue an alarm signal. The traction structure includes a gravity block, a pull rope, and a buckle structure. The gravity block is slidably connected to the guide rod, the pull rope is fixedly connected to the upper surface of the gravity block, and a retaining ring is fixedly connected to the top of the filter screen. The buckle structure is used to engage with the retaining ring to pull up the filter screen. The buckle structure includes two fixed rods, a retaining rod, and a spring. The fixed rods are fixed to the bottom surface of the gravity block, and the retaining rods are hinged to the ends of the corresponding fixed rods, allowing the two retaining rods to rotate towards the gravity block. One end of the spring is fixed to the fixed rod, and the other end is fixed to the retaining rod, so that the two retaining rods close again.

2. The sewage inlet blockage detection device as described in claim 1, characterized in that, The guide ring and filter screen are arranged in several parallel rows covering the water inlet of the detection tube.

3. The sewage inlet blockage detection device as described in claim 2, characterized in that, The filter screen is configured in an inverted cup shape, with the filter screens nested together.

4. The sewage inlet blockage detection device as described in claim 1, characterized in that, The traction structure includes a magnet and a rope, the magnet being used to attract a filter screen made of ferritic stainless steel.

5. The sewage inlet blockage detection device as described in claim 1, characterized in that, The lever is designed in an arc shape that arches towards the gravity block, for easy engagement with the filter screen's retaining ring.

6. The sewage inlet blockage detection device as described in claim 1, characterized in that, A support rod is fixedly connected to the fixed frame, and a barrier is fixedly connected to the support rod. The barrier surrounds the outside of the water inlet of the detection tube and extends out of the water surface.

7. The sewage inlet blockage detection device as described in claim 1, characterized in that, The detection tube is configured as a U-shaped tube, and the level gauge uses an ultrasonic level sensor.

8. A method for detecting blockage at a sewage inlet, characterized in that, The detection device according to any one of claims 1 to 7 includes the following steps: S1, two detection tubes are respectively set on both sides of the wastewater inlet screen cleaner, so that one end of the detection tube is submerged in the wastewater and the opening faces upward, and a level gauge is installed at the other end; a guide rod arranged in parallel is fixed to the submerged end of the detection tube by a fixing bracket, a guide ring is slidably connected to the guide rod, and a filter screen is fixedly connected to the guide ring to filter the wastewater entering the detection tube; if a support rod and a barrier are provided, the support rod is fixed to the fixing bracket, so that the barrier surrounds the outside of the inlet of the detection tube and extends out of the water surface; S2, the liquid level height in the corresponding detection tube is detected by the two level gauges respectively; if the detection tube is a U-shaped tube and the level gauge is an ultrasonic level sensor, the liquid level height in the U-shaped tube is detected by the ultrasonic level sensor, and the detection... The received liquid level height signal is transmitted to the control unit; S3, the control unit receives the liquid level height signals transmitted from the two liquid level gauges and calculates the liquid level difference between them; S4, when the liquid level difference calculated by the control unit exceeds the preset value, the control unit controls the alarm unit electrically connected to it to issue an alarm signal; S5, when the filter screen needs to be replaced, the filter screen is lifted by the traction structure for replacement. If the traction structure includes a magnet and a rope, the magnet is used to attract the filter screen made of ferritic stainless steel and the rope is used to lift it; if the traction structure includes a gravity block, a pull rope and a buckle structure, the gravity block slidably connected to the guide rod is pulled by the pull rope, so that the end of the fixed rod on the bottom surface of the gravity block is hinged to the buckle rod through the hinge, and the buckle rod is engaged with the buckle ring on the top of the filter screen under the action of the spring, thereby lifting the filter screen. The buckle rod is designed to be an arc shape that arches towards the gravity block for easy engagement.

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