Long maintenance period particulate matter online monitoring device

Abstract

The utility model provides a long maintenance period's particulate matter on -line monitoring equipment relates to particulate matter monitoring technical field, including sampling head, pump, a plurality of sampling channels, a plurality of photometers, solenoid valve, flowmeter and control panel, the gas export of sampling head is communicated with all sampling channel gas import, the gas export of all sampling channels is communicated with solenoid valve gas import, solenoid valve gas export is communicated with the gas import of pump, solenoid valve gas export and pump gas import between being provided with flowmeter, be provided with photometer in sampling channel, all photometers are electrically connected with control panel, solenoid valve is electrically connected with control panel, flowmeter is electrically connected with control panel, pump is electrically connected with control panel, the utility model provides a long maintenance period's particulate matter on -line monitoring equipment, solved the photometer maintenance period short problem of particulate matter on -line monitoring equipment of remote control in the prior art, can prolong the maintenance period of particulate matter on -line monitoring equipment, alleviate the work load of staff.

Description

Technical Field

[0001] This utility model relates to the field of particulate matter monitoring technology, and in particular to online particulate matter monitoring equipment with long maintenance cycles. Background Technology

[0002] Measuring the concentration of particulate matter in the air using the principle of light scattering allows for rapid and accurate measurement of environmental particulate matter. Existing technologies, such as the particulate matter concentration monitor using a photometer and optical particle counter disclosed in Chinese Patent Application No. 202121450353.3, provide a particulate matter monitoring device using a photometer. Specifically, air is drawn in through a pump from the sampling head and passes through the photometer. The photometer emits a laser beam or light source. When the light encounters particulate matter in the air, it is scattered. The photometer detects the intensity of the scattered light and converts it into a particulate matter concentration value, thereby achieving real-time monitoring of the concentration of particulate matter in the air.

[0003] After a period of use, particulate matter will adhere to the light source of the photometer, which will affect the photometer's detection work. Therefore, for existing outdoor online monitoring equipment that is fixed outdoors and remotely controlled, frequent maintenance is required, resulting in a heavy workload for the testing personnel. Utility Model Content

[0004] To address the aforementioned technical problems, the particulate matter online monitoring device with a long maintenance cycle provided by this utility model can extend the maintenance cycle of the particulate matter online monitoring device and reduce the workload of staff.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows: This utility model provides an online particulate matter monitoring device with a long maintenance cycle, comprising a sampling head, a pump, multiple photometers, multiple sampling channels, a solenoid valve, a flow meter, and a control board. Each sampling channel includes an air inlet and an air outlet. Air entering through the air inlet of a sampling channel can only exit through the air outlet of that channel. The air outlet of the sampling head is connected to the air inlets of all the sampling channels. The air outlets of all the sampling channels are connected to the air inlets of the solenoid valves. The air outlets of the solenoid valves are connected to the air inlets of the pump. A flow meter is installed between the air outlet of the solenoid valves and the air inlet of the pump. Each sampling channel contains one photometer. All photometers are electrically connected to the control board. The solenoid valves are electrically connected to the control board. The flow meters are electrically connected to the control board. The pump is electrically connected to the control board.

[0006] The particulate matter online monitoring device with a long maintenance cycle provided by this utility model preferably has six sampling channels.

[0007] The above technical solution has the following advantages or beneficial effects: This utility model provides an online particulate matter monitoring device with a long maintenance cycle, relating to the field of particulate matter monitoring technology. It includes a sampling head, a pump, multiple photometers, multiple sampling channels, a solenoid valve, a flow meter, and a control board. Each sampling channel includes an air inlet and an air outlet. Air entering through the air inlet of a sampling channel can only exit through the air outlet of that channel. The air outlet of the sampling head is connected to the air inlets of all the sampling channels. The air outlets of all the sampling channels are connected to the air inlets of the solenoid valves. The air outlet of the solenoid valves is connected to the air inlet of the pump. A flow meter is installed between the air outlet of the solenoid valves and the air inlet of the pump. Each sampling channel contains one photometer. All the photometers are electrically connected to the control board. The solenoid valves are electrically connected to the control board. The flow meters are electrically connected to the control board. The pump is electrically connected to the control board. The particulate matter online monitoring device with a long maintenance cycle provided by this utility model solves the problem that the photometer of the existing remotely controlled particulate matter online monitoring device, which is fixed outdoors, needs to be replaced frequently, resulting in a heavy workload for the staff. It can extend the maintenance cycle of the particulate matter online monitoring device and reduce the workload of the staff. Attached Figure Description

[0008] The present invention, its features, shape, and advantages will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings. Like reference numerals denote like parts throughout the drawings. The drawings are not intentionally drawn to scale; the focus is on illustrating the gist of the invention.

[0009] Figure 1 This is a schematic diagram of the pipeline connection frame of the particulate matter online monitoring device with a long maintenance cycle provided in Embodiment 1 of this utility model.

[0010] Figure 2 This is a schematic diagram of the circuit connection frame of the particulate matter online monitoring device with a long maintenance cycle provided in Embodiment 1 of this utility model. Detailed Implementation

[0011] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. It should also be noted that the terminology used in this utility model is for describing specific implementations only and is not intended to limit the exemplary implementations according to this application.

[0012] The technical solutions of the present utility model will be described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present utility model, and not all of them. Therefore, the detailed description of the embodiments of the present utility model provided in the accompanying drawings is not intended to limit the scope of the claimed utility model, but merely to illustrate selected embodiments of the present utility model. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without inventive effort are within the protection scope of the present utility model.

[0013] Example 1: In existing technologies, outdoor, remotely controlled particulate matter online monitoring devices require maintenance of their internal photometers over extended periods. This is because particulate matter enters the photometer from the sampling head and accumulates inside, affecting its monitoring effectiveness. Therefore, after a period of use, staff must remove and replace the photometer. Since these devices are often located far apart (multiple devices per city), a single staff member may be responsible for maintaining multiple devices in different cities. Given this inevitable particulate matter buildup during monitoring, a longer maintenance cycle is preferable. To extend the maintenance cycle for photometer replacement, Embodiment 1 of this invention provides a particulate matter online monitoring device with a long maintenance cycle. Figures 1 to 2 As shown, the system includes a sampling head 1, a pump 2, multiple photometers 3, multiple sampling channels 4, a solenoid valve 5, a flow meter 6, and a control board 7. Each sampling channel 4 has an air inlet and an air outlet. Air entering through the air inlet of a sampling channel 4 can only exit through the air outlet of that channel. The air outlet of the sampling head 1 is connected to the air inlets of all sampling channels 4. The air outlets of all sampling channels 4 are connected to the air inlets of the solenoid valves 5 and 2. A flow meter 6 is installed between the air outlet of the solenoid valves 5 and the air inlet of the pump 2. Each sampling channel 4 contains one photometer 3. All photometers 3 are electrically connected to the control board 7. The solenoid valves 5, 6, and pump 2 are electrically connected to the control board 7.

[0014] The particulate matter online monitoring device with a long maintenance cycle provided in Embodiment 1 of this utility model operates by pump 2, which generates suction to draw air in from sampling head 1. The gas passes through photometer 3 in one of the sampling channels 4, then through solenoid valve 5, and finally into pump 2. During this process, flowmeter 6 continuously monitors the flow rate in the pipe connecting solenoid valve 5 and pump 2 (the photometer in this embodiment needs to operate at a flow rate of 2 L / min). Flowmeter 6 feeds back the monitored flow rate to control board 7 (this embodiment uses a microcontroller as the core of control board 7; how to write the microcontroller program for receiving and sending instructions is existing technology and will not be elaborated here). Control board 7 controls the rotation speed of pump 2 based on the feedback signal to stabilize the airflow velocity through the photometer. Photometer 3 sends the monitored particulate matter concentration signal to control board 7, which is then transmitted to the network by the remote signal transmission module built into control board 7. The device allows for remote monitoring of particulate matter concentration in areas where online particulate matter monitoring equipment is installed. Control board 7 monitors the rotational speed of pump 2. When the pump 2's rotational speed exceeds a certain value (90% speed) (for a brand-new photometer 3, pump 2 can maintain a flow rate of 2 L / min at 40% speed), control board 7 sends a signal to solenoid valve 5. Solenoid valve 5 then switches the photometer 3 connected to its air inlet, thus achieving the switching of photometer 3. Compared to existing technologies with only one photometer 3, the device provided in this embodiment uses multiple sampling channels 4 to accommodate multiple photometers 3, and achieves the switching of photometers 3 through solenoid valve 5. By using control board 7 to monitor the pump 2 speed and control solenoid valve 5 to switch the outlet of the connected sampling channel 4, maintenance can be performed on-site only when all photometers 3 are unable to function properly due to particulate matter contamination, thereby reducing the frequency of maintenance and the workload of staff.

[0015] The particulate matter online monitoring device with a long maintenance cycle provided in Embodiment 1 of this utility model solves the problem that the photometer of the remotely controlled particulate matter online monitoring device fixed outdoors in the prior art needs to be replaced frequently, resulting in a heavy workload for the staff. It can extend the maintenance cycle of the particulate matter online monitoring device and reduce the workload of the staff.

[0016] As a preferred embodiment, in this example, the number of sampling channels 4 is six. In the device provided in this embodiment, without multiple sampling channels 4 connected in parallel and photometers 3 installed within each sampling channel 4, the maintenance cycle for photometers 3 is once a month. Since for particulate matter online monitoring equipment, not only photometers 3 require maintenance, but the other components of the particulate matter online monitoring equipment also require maintenance every six months, this embodiment uses six photometers 3. This ensures that the maintenance cycle for photometers 3 is consistent with the maintenance cycle required for the other components of the particulate matter online monitoring equipment, facilitating unified maintenance by staff. (For cities with poor environmental quality, such as those with heavy sandstorms, photometer maintenance may be required every half month, but this would also shorten the maintenance cycle for the other components of the particulate matter online monitoring equipment; six photometers 3 are the preferred solution in this embodiment.)

[0017] In summary, this utility model provides an online particulate matter monitoring device with a long maintenance cycle, relating to the field of particulate matter monitoring technology. It includes a sampling head, a pump, multiple photometers, multiple sampling channels, a solenoid valve, a flow meter, and a control board. Each sampling channel includes an air inlet and an air outlet. Air entering through the air inlet of a sampling channel can only exit through the air outlet of that channel. The air outlet of the sampling head is connected to the air inlets of all the sampling channels. The air outlets of all the sampling channels are connected to the air inlets of the solenoid valves. The air outlets of the solenoid valves are connected to the air inlets of the pump. A flow meter is installed between the air outlet of the solenoid valves and the air inlet of the pump. Each sampling channel contains one photometer. All the photometers are electrically connected to the control board. The solenoid valves are electrically connected to the control board. The flow meters are electrically connected to the control board. The pump is electrically connected to the control board. The particulate matter online monitoring device with a long maintenance cycle provided by this utility model solves the problem that the photometer of the existing remotely controlled particulate matter online monitoring device, which is fixed outdoors, needs to be replaced frequently, resulting in a heavy workload for the staff. It can extend the maintenance cycle of the particulate matter online monitoring device and reduce the workload of the staff.

[0018] The above description is only a preferred embodiment of the present utility model and does not limit the patent scope of the present utility model. Any equivalent structural transformations made based on the contents of the present utility model specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of the present utility model.

Claims

1. A particulate matter online monitoring device with a long maintenance cycle, comprising a sampling head and a pump, characterized in that, It also includes multiple photometers, multiple sampling channels, solenoid valves, flow meters, and control boards; The sampling channel includes an air inlet and an air outlet; air entering from the air inlet of the sampling channel can only flow out from the air outlet of the sampling channel; The air outlet of the sampling head is connected to the air inlet of all the sampling channels; the air outlet of all the sampling channels is connected to the air inlet of the solenoid valve; the air outlet of the solenoid valve is connected to the air inlet of the pump; and a flow meter is provided between the air outlet of the solenoid valve and the air inlet of the pump. Each of the sampling channels is equipped with a photometer. All of the photometers are electrically connected to the control board; the solenoid valves are electrically connected to the control board; the flow meters are electrically connected to the control board; and the pumps are electrically connected to the control board.

2. The particulate matter online monitoring device with a long maintenance cycle as described in claim 1, characterized in that, The number of sampling channels is six.

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