Flow metering device and method for obstructing and collecting suspended solids

Abstract

The invention discloses a flow metering device for obstructing and collecting suspended solids and a method thereof, and belongs to the technical field of flow measurement. The device comprises a caisson structure, the caisson structure is of a box type structure with an opening in the upper end, a front baffle and a rear baffle are arranged on the two sides of the caisson structure, and a metering structure is arranged in a box body of the caisson structure; the metering structure comprises an upstream pipeline, a pipeline type flow meter and a downstream pipeline, the front end of the upstream pipeline penetrates through the front baffle and is connected with a downward elbow, and the pipeline type flow meter is located in the cavity of the caisson structure. The prefabricated pipeline type flow meter is adopted, the drainage channel is cut off through the front baffle and the rear baffle, suspended solids are effectively prevented from flowing to the downstream of the drainage channel through a pipeline, petroleum and suspended solids can be automatically and completely separated and enriched from drained water, the labor cost and the hazardous waste disposal cost are greatly reduced, and the environmental protection risk is reduced; meanwhile, the drainage amount can be accurately metered on the premise that the upstream water level is not greatly increased and upstream drainage construction does not need to be stopped.

Description

Technical Field

[0001] The present invention relates to the technical field of flow measurement, and more particularly to a flow metering device for blocking and collecting suspended matter and a method thereof. Background Art

[0002] According to the "Technical Guidelines for Self-Monitoring by Pollutant Dischargers" for various industries, petroleum and suspended solids emissions require regular manual monitoring, but real-time monitoring of these emissions is not possible. For sudden, large-scale, short-term environmental pollution incidents involving the release of petroleum and suspended solids, oil locks are currently the primary method of collecting these substances in drainage water. These locks are only suitable for water surfaces with minimal water level fluctuations and gentle currents. Even in areas with minimal water level fluctuations and gentle currents, once a certain amount of collected petroleum and suspended solids reaches a certain level, they will flow out through the gaps at the ends of the locks. The greater the water level fluctuations, the larger the gaps between the locks, and the less effective the capture of petroleum and suspended solids. To ensure adequate oil and suspended solids capture, the height of the ropes on each side of the locks must be manually adjusted in real time. Oil locks are not suitable for areas with turbulent currents, as they cannot effectively collect petroleum and suspended solids in the water and are also prone to damage. During use, oil and suspended solids collected by oil locks must be manually retrieved regularly. Damaged locks are considered hazardous waste and contaminated, making disposal expensive and difficult. Due to the limitations of the oil interception lock itself, it cannot intercept a large amount of oil and suspended matter. Beyond a certain amount, the oil and suspended matter can easily flow out from both sides of the oil interception lock, and the effect is not good in actual use. Therefore, it is difficult to control the environmental protection of oil and suspended matter in corporate and municipal drainage.

[0003] Currently, open channel flow is mostly measured using Parshall flume flowmeters. The end of the Parshall flume must be higher than the downstream water level, requiring the upstream water level to be raised to ensure accurate measurement. Typically, this raises the upstream water level by at least 1 meter, hindering upstream drainage and flood control. Furthermore, during Parshall flume construction and installation, all upstream drainage must be halted or a temporary bypass constructed, severely impacting production and livelihoods and resulting in significant costs. Summary of the Invention

[0004] 1. Technical problem to be solved by the invention

[0005] In response to the defects and shortcomings of the existing technology, the present invention provides a flow metering device and method for blocking and collecting suspended matter. The present invention adopts a prefabricated pipeline flow meter, and designs the sizes of the front baffle and the rear baffle according to the size of the drainage channel at the installation position of the pipeline flow meter. The drainage channel is cut off by the front baffle and the rear baffle, and the two ends of the pipeline pass through the baffle respectively. The front end of the upstream pipeline adopts a downward elbow design, which effectively prevents suspended matter from flowing through the pipeline to the downstream of the drainage channel, and the suspended matter is continuously enriched at the front end of the front baffle.

[0006] The present invention can automatically and completely separate and enrich petroleum and suspended matter from drainage, while avoiding the frequent manual collection of petroleum and suspended matter in a short period of time, and also avoiding the generation of hazardous waste contaminants, thereby greatly reducing labor costs and hazardous waste disposal costs, and also reducing environmental risks. At the same time, it can accurately measure the drainage water volume without significantly raising the upstream water level and without stopping the upstream drainage construction.

[0007] 2. Technical solution

[0008] In order to achieve the above object, the technical solution provided by the present invention is:

[0009] The flow metering device for blocking and collecting suspended solids of the present invention comprises a caisson structure, wherein the caisson structure is a box-type structure with an upper end open, a front baffle and a rear baffle are provided on both sides of the caisson structure, and a metering structure is provided in the box body of the caisson structure;

[0010] The metering structure includes an upstream pipeline, a pipeline flowmeter and a downstream pipeline. The two ends of the pipeline flowmeter are connected to the upstream pipeline and the downstream pipeline respectively. The front end of the upstream pipeline passes through the front baffle and is connected to a downward elbow. The rear end of the downstream pipeline passes through the rear baffle and extends to the outside of the caisson structure. The pipeline flowmeter is located in the cavity of the caisson structure.

[0011] Furthermore, the caisson structure is placed in a drainage ditch, and the width dimensions of the front baffle and the rear baffle correspond to the width dimensions of the drainage ditch.

[0012] Furthermore, a straight ladder is provided in the caisson structure.

[0013] The pipeline flowmeter is provided with stop valves at both ends, and the stop valves are also located in the cavity of the caisson structure.

[0014] Furthermore, the upper edge of the caisson structure is 0.5 meters higher than the upper edges of the front baffle and the rear baffle, and an overflow port is formed between the front baffle, the rear baffle, the caisson structure and the drainage channel.

[0015] Furthermore, a counterweight is provided on the surface of the front baffle or the rear baffle;

[0016] The mass of the counterweight M 配重 (kg) minimum:

[0017] M 配重 (kg) = ρ × V 沉箱 -M 沉箱 -M 挡板 -M 计量

[0018] Where ρ: density of water; M 沉箱 : the mass of the caisson structure; M 挡板 : Total mass of the front baffle and rear baffle; M计量 : Total mass of the metering structure.

[0019] Furthermore, the metering structure is arranged in an offset manner inside the caisson structure, and a straight ladder is arranged on the side with a larger space.

[0020] Furthermore, the length of the upstream pipeline is greater than ten times its diameter, the length of the downstream pipeline is greater than five times its diameter, and the metering structure is placed horizontally as a whole.

[0021] Furthermore, the lower edge of the downward elbow is lower than the lower edge of the upstream pipeline.

[0022] A flow metering device and method for blocking and collecting suspended matter, comprising the following steps:

[0023] Step 1: Make the front and rear baffles according to the size of the ditch and river at the installation point;

[0024] Step 2: Select the pipe diameter according to the flow rate, and then select the corresponding pipeline flow meter. The pipeline flow meter needs to be installed with corresponding stop valves on both sides, and both are installed in the cavity of the caisson structure for easy maintenance and replacement;

[0025] Step 3: The caisson structure adopts an offset structure, with a large space reserved on one side of the pipeline and a small space on the other side. The volume of the caisson structure is minimized while ensuring that personnel can enter for maintenance, thereby reducing the mass of the counterweight and reducing the difficulty and danger of lifting;

[0026] Step 4: Calculate the mass of the counterweight according to the formula for calculating the counterweight mass in the technical solution, and evenly weld or hang it on the front and rear baffles;

[0027] Step 5: The length of the upstream pipeline is greater than ten times its diameter, and the length of the downstream pipeline is greater than five times its diameter, meeting the "front ten and back five" requirement of the pipeline flowmeter, and the pipeline must be placed horizontally;

[0028] Step 6: Connect the front end of the upstream pipe to a downward elbow. The front end adopts a downward elbow design. The lower end of the downward elbow must be lower than the lower end of the upstream pipe to prevent suspended matter from entering the pipe and flowing downstream.

[0029] Step 7: The entire device needs to be made of anti-corrosion materials because it will be placed in water for a long time. After the device is made as required, open the stop valves on both sides of the pipeline flowmeter and use a crane to directly lift it to the ditch or river installation point.

[0030] 3. Beneficial effects

[0031] Compared with the prior art, the technical solution provided by the present invention has the following beneficial effects:

[0032] The present invention adopts a prefabricated pipeline flow meter. The sizes of the front baffle and the rear baffle are designed according to the size of the drainage channel at the installation position of the pipeline flow meter. The drainage channel is cut off by the front baffle and the rear baffle. The two ends of the pipeline pass through the baffle respectively. The front end of the upstream pipeline adopts a downward elbow design, which effectively prevents oil and suspended matter from flowing through the pipeline to the downstream of the drainage channel. The oil and suspended matter are continuously enriched at the front end of the front baffle.

[0033] The present invention can automatically and completely separate and enrich petroleum and suspended matter from drainage, while avoiding the frequent manual collection of petroleum and suspended matter in a short period of time, and also avoiding the generation of hazardous waste contaminants, thereby greatly reducing labor costs and hazardous waste disposal costs, and also reducing environmental risks. At the same time, it can accurately measure the drainage water volume without significantly raising the upstream water level and without stopping the upstream drainage construction. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 It is the overall structural diagram of the present invention;

[0035] Figure 2 is a side view of the present invention;

[0036] Figure 3 A top view of the present invention;

[0037] Figure 4 It is the AA cross-sectional view of the present invention.

[0038] In the figure: 1. Caisson structure; 101. Straight ladder; 2. Metering structure; 201. Upstream pipeline; 202. Pipeline flowmeter; 203. Downstream pipeline; 204. Downward elbow; 205. Stop valve; 3. Drainage channel; 4. Front baffle; 5. Rear baffle; 6. Overflow port; 7. Counterweight. DETAILED DESCRIPTION

[0039] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0040] Example 1

[0041] from Figure 1-4 It can be seen that the flow metering device for blocking and collecting suspended solids in this embodiment includes a caisson structure 1, which is a box-type structure with an open top. A front baffle 4 and a rear baffle 5 are provided on both sides of the caisson structure 1. A metering structure 2 is provided inside the box of the caisson structure 1.

[0042] The metering structure 2 includes an upstream pipeline 201, a pipeline flowmeter 202 and a downstream pipeline 203. The two ends of the pipeline flowmeter 202 are connected to the upstream pipeline 201 and the downstream pipeline 203 respectively. The front end of the upstream pipeline 201 passes through the front baffle 4 and is connected to a downward elbow 204. The lower edge of the downward elbow 204 is lower than the lower edge of the upstream pipeline 201. The rear end of the downstream pipeline 203 passes through the rear baffle 5 and extends to the outside of the caisson structure 1. The pipeline flowmeter 202 is in the cavity of the caisson structure 1. The front and rear ends of the pipeline flowmeter 202 are provided with stop valves 205, and the stop valve 205 is also in the cavity of the caisson structure 1.

[0043] The caisson structure 1 is placed in the drainage channel 3 , and the widths of the front baffle 4 and the rear baffle 5 correspond to the width of the drainage channel 3 ; a straight ladder 101 is provided in the caisson structure 1 .

[0044] The upper edge of the caisson structure 1 is 0.5 meters higher than the upper edges of the front baffle 4 and the rear baffle 5 , and an overflow port 6 is formed between the front baffle 4 , the rear baffle 5 , the caisson structure 1 and the drainage channel 3 .

[0045] During rainstorm drainage, water flows away from the overflow ports 6 on both sides, which is beneficial for drainage;

[0046] Due to the provision of the front baffle 4, the rear baffle 5, and the downward elbow 204 of the pipe, suspended matter in the water cannot be discharged, thereby reducing the failure rate of the downstream automatic monitoring facilities and the probability of data anomalies, and also reducing the amount of pollutant emissions.

[0047] Since there is buoyancy in the water due to the presence of the caisson structure 1, in order to offset the buoyancy generated by the caisson structure 1 in the water, it is necessary to install corresponding counterweights 7 on the front baffle 4 or the rear baffle 5 or the caisson structure 1;

[0048] In this embodiment, a counterweight 7 is provided on the surface of the front baffle 4 or the rear baffle 5;

[0049] The mass M of the counterweight 7 配重 (kg) minimum:

[0050] M 配重 (kg) = ρ × V 沉箱 -M 沉箱 -M 挡板 -M 计量

[0051] Where ρ: density of water; M 沉箱 : the mass of the caisson structure 1; M 挡板 : Total mass of the front baffle 4 and the rear baffle 5; M 计量 : The total mass of the metering structure 2.

[0052] The metering structure 2 is arranged inside the caisson structure 1 in an offset manner, and a straight ladder 101 is provided on the side with a larger space to facilitate maintenance and inspection.

[0053] The length of the upstream pipe 201 is greater than ten times its diameter, the length of the downstream pipe 203 is greater than five times its diameter, and the metering structure 2 is placed horizontally as a whole.

[0054] The flow metering device of the present invention for blocking and collecting suspended matter does not require raising the water level and can automatically and completely separate and enrich petroleum and suspended matter from drainage. At the same time, it can avoid frequent manual scooping of collected petroleum and suspended matter in a short period of time, and also avoid the generation of hazardous waste contaminants, thereby greatly reducing labor costs and hazardous waste disposal costs, and also reducing environmental risks. At the same time, it can accurately measure the drainage water volume without significantly raising the upstream water level and without stopping the upstream drainage construction.

[0055] The present invention adopts a prefabricated pipeline flow meter. The sizes of the front baffle 4 and the rear baffle 5 are designed according to the size of the drainage channel 3 at the installation position of the pipeline flow meter 202. The drainage channel 3 is cut off by the front baffle 4 and the rear baffle 5. The two ends of the pipeline pass through the baffle respectively. The front end of the upstream pipeline 201 adopts a downward elbow 204 design, which effectively prevents petroleum and suspended matter from flowing through the pipeline to the downstream of the drainage channel 3. Petroleum and suspended matter are continuously enriched at the front end of the front baffle 4.

[0056] The pipeline flow meter 202 is installed on the pipeline and meets the requirements that the length of the front straight pipe section is 10 times the pipe diameter and the length of the rear straight pipe section is 5 times the pipe diameter. The outer side of the pipeline flow meter 202 is designed as a caisson structure 1, and a straight ladder 101 is installed to facilitate maintenance and replacement of equipment. The upper edge of the caisson structure 1 is 0.5 meters higher than the baffle to prevent water from entering the caisson structure 1 during flood season and damaging the pipeline flow meter 202.

[0057] Example 2

[0058] from Figure 1-4 It can be seen that the method of blocking and collecting a flow metering device of the present embodiment comprises the following steps:

[0059] Step 1: Make the front baffle 4 and the rear baffle 5 according to the size of the ditch and river at the installation point;

[0060] Step 2: Select the pipe diameter according to the flow rate, and then select the corresponding pipeline flow meter 202. Corresponding stop valves 205 need to be installed on both sides of the pipeline flow meter 202, and both are installed in the cavity of the caisson structure 1 for easy maintenance and replacement;

[0061] Step 3: The caisson structure 1 adopts an offset structure, with a large space reserved on one side of the pipeline and a small space on the other side. The volume of the caisson structure 1 is minimized while ensuring that personnel can enter for maintenance, thereby reducing the mass of the counterweight 7 and reducing the difficulty and danger of lifting;

[0062] Step 4: Calculate the mass of the counterweight 7 according to the formula for calculating the mass of the counterweight 7 in the technical solution, and evenly weld or hang it on the front baffle 4 and the rear baffle 5;

[0063] Step 5: The length of the upstream pipe 201 is greater than ten times its diameter, and the length of the downstream pipe 203 is greater than five times its diameter, meeting the "front ten and back five" requirement of the pipeline flow meter 202, and the pipelines must be placed horizontally;

[0064] Step 6: The front end of the upstream pipe 201 is connected to the downward elbow 204. The front end is designed as a downward elbow. The lower end of the downward elbow 204 must be lower than the lower end of the upstream pipe 201 to prevent suspended matter from entering the pipe and flowing downstream.

[0065] Step 7: The entire device needs to be made of anti-corrosion materials because it is placed in water for a long time. After the device is made as required, open the stop valves 205 on both sides of the pipeline flow meter 202 and use a crane to directly lift it to the ditch or river installation point.

[0066] This invention prefabricates a complete facility based on parameters such as the size of the open channel at the flowmeter installation location and the flowmeter type. The facility is then directly installed using a crane, eliminating the need to stop upstream drainage, temporarily excavate a bypass, or construct any civil engineering work. With adequate preparation, the entire device can be fabricated and installed within a single day, significantly shortening the construction period and significantly reducing investment and downtime losses. Furthermore, there's no need to significantly raise the upstream water level, preventing waterlogging in the upstream area.

[0067] After the implementation of this technology, suspended matter such as floating oil, floating ash and fallen leaves discharged from upstream cannot flow downstream through the pipeline and continue to accumulate in front of the baffle. Since there is no need to worry about suspended matter flowing downstream, manual cleaning is currently carried out in conjunction with on-site inspections when suspended matter is found to be highly enriched. According to current experience, only two cleanings per year are required. In comparison, the use of oil interception locks requires daily cleaning, which greatly reduces the number of cleanings and improves inspection efficiency.

[0068] The above is a schematic description of the present invention and its embodiments, which is not restrictive. The drawings show only one embodiment of the present invention, and the actual structure is not limited thereto. Therefore, if a person skilled in the art is inspired by this and, without departing from the purpose of the present invention, designs a structure and embodiment similar to this technical solution without inventiveness, they shall fall within the scope of protection of the present invention.

Claims

1. A flow metering device for blocking and collecting suspended solids, comprising a caisson structure (1), characterized in that: The caisson structure (1) is a box-type structure with an open top, a front baffle (4) and a rear baffle (5) are provided on both sides of the caisson structure (1), and a metering structure (2) is provided inside the box body of the caisson structure (1); The metering structure (2) comprises an upstream pipeline (201), a pipeline flow meter (202) and a downstream pipeline (203). The two ends of the pipeline flow meter (202) are respectively connected to the upstream pipeline (201) and the downstream pipeline (203). The front end of the upstream pipeline (201) passes through the front baffle (4) and is connected to a downward elbow (204). The rear end of the downstream pipeline (203) passes through the rear baffle (5) and extends to the outside of the caisson structure (1). The pipeline flow meter (202) is located in the cavity of the caisson structure (1).

2. A flow metering device for isolating and collecting suspended solids according to claim 1, characterized in that: The caisson structure (1) is placed in the drainage channel (3), and the width dimensions of the front baffle (4) and the rear baffle (5) correspond to the width dimensions of the drainage channel (3).

3. The flow metering device for isolating and collecting suspended solids according to claim 1, characterized in that: A straight ladder (101) is provided in the caisson structure (1).

4. The flow metering device for isolating and collecting suspended solids according to claim 1, characterized in that: Both the front and rear ends of the pipeline flow meter (202) are provided with stop valves (205), and the stop valves (205) are also located in the cavity of the caisson structure (1).

5. The flow metering device for isolating and collecting suspended solids according to claim 1, characterized in that: The upper edge of the caisson structure (1) is 0.5 meters higher than the upper edges of the front baffle (4) and the rear baffle (5), and an overflow port (6) is formed between the front baffle (4), the rear baffle (5), the caisson structure (1) and the drainage channel (3).

6. The flow metering device for isolating and collecting suspended solids according to claim 1, characterized in that: A counterweight (7) is provided on the surface of the front baffle (4) or the rear baffle (5); The mass M of the counterweight (7) 配重 (kg) minimum: M 配重 (kg)=ρ×V 沉箱 -M 沉箱 -M 挡板 -M 计量 Where ρ: density of water; M 沉箱 : the mass of the caisson structure (1); M 挡板 : Total mass of the front baffle (4) and the rear baffle (5); M 计量 : Total mass of the metering structure (2).

7. The flow metering device for blocking and collecting suspended solids according to claim 3, characterized in that: The metering structure (2) is arranged inside the caisson structure (1) in an offset manner, and a straight ladder (101) is arranged on the side with a larger space.

8. The flow metering device for isolating and collecting suspended solids according to claim 1, characterized in that: The length of the upstream pipeline (201) is greater than ten times its diameter, the length of the downstream pipeline (203) is greater than five times its diameter, and the metering structure (2) is placed horizontally as a whole.

9. The flow metering device for blocking and collecting suspended solids according to claim 1, characterized in that: The lower edge of the downward elbow (204) is lower than the lower edge of the upstream pipe (201).

10. The flow metering device and method for isolating and collecting suspended solids according to claim 1, characterized in that: The steps are: Step 1: Make the front baffle (4) and the rear baffle (5) according to the size of the ditch and river at the installation point; Step 2: Select the pipe diameter according to the flow rate, and then select the corresponding pipeline flow meter (202). Corresponding stop valves (205) need to be installed on both sides of the pipeline flow meter (202), and both are installed in the cavity of the caisson structure (1) to facilitate maintenance and replacement; Step 3: The caisson structure (1) adopts an offset structure, with a large space reserved on one side of the pipeline and a small space on the other side. The volume of the caisson structure (1) is minimized while ensuring that personnel can enter for maintenance, thereby reducing the mass of the counterweight (7) and reducing the difficulty and danger of lifting; Step 4: Calculate the mass of the counterweight (7) according to the formula for calculating the mass of the counterweight (7) in the technical solution, and evenly weld or hang it on the front baffle (4) and the rear baffle (5); Step 5: The length of the upstream pipeline (201) is greater than ten times its diameter, and the length of the downstream pipeline (203) is greater than five times its diameter, meeting the "front ten and back five" requirement of the pipeline flow meter, and the pipelines need to be placed horizontally; Step 6: The front end of the upstream pipe (201) is connected to a downward elbow (204). The front end adopts a downward elbow design. The lower end of the downward elbow (204) must be lower than the lower end of the upstream pipe (201) to prevent suspended matter from entering the pipe and flowing downstream. Step 7: The entire device needs to be made of anti-corrosion materials because it is placed in water for a long time. After the device is made as required, open the stop valves (205) on both sides of the pipeline flow meter (202) and use a crane to directly lift it to the ditch or river installation point.

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