Valve control system of dust concentration measuring device

Abstract

The utility model relates to a valve control system of a dust concentration measuring device, which comprises a measuring chamber, a flue total pressure tapping pipe, a flue static pressure tapping pipe, a measuring chamber total pressure tapping pipe and a measuring chamber static pressure tapping pipe, the valve control system comprises an electromagnetic valve seat, a flue full-pressure electromagnetic valve, a flue static-pressure electromagnetic valve, a measuring chamber full-pressure electromagnetic valve and a measuring chamber static-pressure electromagnetic valve, and the electromagnetic valve seat is provided with a gas source passage. In a purging state, the flue total pressure solenoid valve, the flue static pressure solenoid valve, the measurement chamber total pressure solenoid valve and the measurement chamber static pressure solenoid valve are all communicated with the gas source passage, and the flue total pressure tapping pipe, the flue static pressure tapping pipe, the measurement chamber total pressure tapping pipe and the measurement chamber static pressure tapping pipe are purged, so that particles in flue gas can be effectively prevented from blocking a pipeline, and the pipeline is prevented from being blocked. In addition, the self-cleaning function of the device can be achieved through the valve control system, the labor intensity of workers is effectively reduced, and the cleaning efficiency is improved.

Description

Technical Field

[0001] This utility model relates to the field of dust concentration measurement technology, and in particular to a valve control system for a dust concentration measurement device. Background Technology

[0002] The light scattering dust concentration measurement method is a specialized detection instrument widely used in environmental monitoring, industrial production, scientific research experiments, homes and public places, and medical and health fields. Its working principle is based on the principle of light scattering. When particulate matter in a gas passes through a laser beam, it scatters light. The intensity of this scattered light is detected by a photoelectric sensor, thereby calculating the dust concentration.

[0003] Currently, existing dust concentration measuring devices do not have self-cleaning functions. After long-term use, dust easily adheres to the probe or pipeline, resulting in a decrease in measurement accuracy. Regular cleaning of the equipment is required, which increases the equipment maintenance cost. Utility Model Content

[0004] In view of the shortcomings of the prior art described above, the purpose of this utility model is to provide a valve control system for a dust concentration measuring device, which solves the problem that the existing dust concentration measuring devices do not have a self-cleaning function. After long-term use, dust easily adheres to the probe or pipeline, resulting in a decrease in measurement accuracy. Regular cleaning of the equipment is required, which increases the equipment maintenance cost.

[0005] To achieve the above and other related objectives, this utility model provides a valve control system for a dust concentration measuring device, including a measuring chamber, a flue gas total pressure tapping pipe, a flue gas static pressure tapping pipe, a measuring chamber total pressure tapping pipe, a measuring chamber static pressure tapping pipe, a flue gas differential pressure sensor, and a measuring chamber differential pressure sensor. The valve control system includes:

[0006] The solenoid valve seat is provided with a gas source passage, a flue gas total pressure output port, a flue gas static pressure output port, a measuring chamber total pressure output port, and a measuring chamber static pressure output port; the flue gas total pressure output port and the flue gas static pressure output port are both connected to the flue gas differential pressure sensor, and the measuring chamber total pressure output port and the measuring chamber static pressure output port are both connected to the measuring chamber differential pressure sensor;

[0007] A flue full pressure solenoid valve is connected to the flue full pressure tapping pipe. The flue full pressure solenoid valve is used to switch the connection status between the flue full pressure tapping pipe and the flue full pressure output port or the gas source passage.

[0008] A flue static pressure solenoid valve is connected to the flue static pressure tapping pipe. The flue static pressure solenoid valve is used to switch the connection status between the flue static pressure tapping pipe and the flue static pressure output port or the gas source passage.

[0009] A total pressure solenoid valve for measuring chamber is connected to the total pressure tapping pipe of the measuring chamber. The total pressure solenoid valve for measuring chamber is used to switch the connection status of the total pressure tapping pipe of the measuring chamber with the total pressure output port of the measuring chamber or the gas source passage.

[0010] The measuring chamber static pressure solenoid valve is connected to the measuring chamber static pressure output port. The measuring chamber static pressure solenoid valve is used to switch the connection status of the measuring chamber static pressure tapping pipe with the measuring chamber static pressure output port or the gas source passage.

[0011] Optionally, it also includes a buffer chamber, which is connected to the gas source passage.

[0012] Optionally, the buffer chamber is provided with a pressure relief port.

[0013] Optionally, the measuring chamber is provided with a window for the measuring beam to enter the measuring chamber, and the measuring chamber is provided with a purging component corresponding to the window, the purging component being used to purge the window.

[0014] Optionally, it also includes a purge solenoid valve, which is connected to the purge component and is used to connect or disconnect the purge component from the air source passage.

[0015] Optionally, the purging component is provided with a light-transmitting hole along the axial direction, and the light-transmitting hole is correspondingly provided with the window plate.

[0016] Optionally, the purging component has multiple purging channels distributed on it. The purging channels are opened radially along the purging component. The purging channels are connected to the light-transmitting holes and the purging solenoid valve.

[0017] Optionally, the solenoid valve seat is provided with an air inlet connector, which is used to connect to an air source and is connected to the air source passage.

[0018] Optionally, the solenoid valve seat is further provided with a purge output port, and the purge output port is provided with a plug.

[0019] Optionally, the plug is threadedly connected to the solenoid valve.

[0020] As described above, this utility model has the following beneficial effects: In the measurement state, the total pressure tapping pipe of the flue is connected to the flue differential pressure sensor via the total pressure solenoid valve of the flue, and the static pressure tapping pipe of the flue is connected to the flue differential pressure sensor via the static pressure solenoid valve of the flue. The difference between the total pressure and the static pressure of the flue is measured by the flue differential pressure sensor, and the flue gas velocity is calculated. Similarly, the total pressure tapping pipe of the measuring chamber is connected to the measuring chamber differential pressure sensor via the total pressure solenoid valve of the measuring chamber, and the static pressure tapping pipe of the measuring chamber is connected to the measuring chamber differential pressure sensor via the static pressure solenoid valve of the measuring chamber. The difference between the total pressure and the static pressure of the measuring chamber is measured by the measuring chamber differential pressure sensor, and the flue gas velocity of the measuring chamber is calculated. The feedback device adjusts the flue gas velocity of the measuring chamber to be consistent with the flue gas velocity to eliminate the influence of the flue gas velocity on the measurement results. In the purging state, the total pressure solenoid valve of the flue cuts off the connection with the total pressure output port of the flue. The system is in an open state and connected to the gas source passage to purge the total pressure tapping pipe of the flue; the flue static pressure solenoid valve is disconnected from the static pressure output port of the flue and connected to the gas source passage to purge the static pressure tapping pipe of the flue; the measuring chamber total pressure solenoid valve is disconnected from the total pressure output port of the measuring chamber and connected to the gas source passage to purge the total pressure tapping pipe of the measuring chamber; the measuring chamber static pressure solenoid valve is disconnected from the static pressure output port of the measuring chamber and connected to the gas source passage to purge the static pressure tapping pipe of the measuring chamber; by purging the total pressure tapping pipe of the flue, the static pressure tapping pipe of the flue, the total pressure tapping pipe of the measuring chamber, and the static pressure tapping pipe of the measuring chamber, it is possible to effectively prevent particles in the flue gas from clogging the pipeline, improve the measurement accuracy, and, through the valve control system, realize the self-cleaning function of the device, effectively reducing the labor intensity of personnel and improving the cleaning efficiency. Attached Figure Description

[0021] Figure 1 The diagram shown is a structural schematic of the valve control system of the dust concentration measuring device shown in an embodiment of this application.

[0022] Figure 2 The diagram shown is a cross-sectional view of the electromagnetic valve seat as illustrated in an embodiment of this application.

[0023] Figure 3 The diagram shown is a cross-sectional view of the purging component as illustrated in an embodiment of this application.

[0024] Explanation of reference numerals in the attached figures

[0025] Solenoid valve seat 1, air source passage 101, flue gas full pressure output port 102, flue gas static pressure output port 103, measuring chamber full pressure output port 104, measuring chamber static pressure output port 105, air inlet connector 106, plug 107, flue gas full pressure solenoid valve 2, flue gas static pressure solenoid valve 3, measuring chamber full pressure solenoid valve 4, measuring chamber static pressure solenoid valve 5, buffer chamber 6, pressure relief port 601, purging component 7, light passage 701, purging channel 702, purging solenoid valve 8. Detailed Implementation

[0026] The following specific examples illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification. This utility model can also be implemented or applied through other different specific embodiments, and various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of this utility model.

[0027] Please see Figures 1 to 3 It should be noted that the illustrations provided in this embodiment are only schematic representations of the basic concept of this utility model. Therefore, the drawings only show components relevant to this utility model and are not drawn according to the actual number, shape, and size of the components in implementation. In actual implementation, the form, quantity, and proportion of each component can be arbitrarily changed, and the component layout may be more complex. The structures, proportions, and sizes shown in the accompanying drawings are only for illustrative purposes and to assist those skilled in the art in understanding and reading the content disclosed in the specification. They are not intended to limit the implementation conditions of this utility model and therefore have no substantial technical significance. Any modifications to the structure, changes in proportions, or adjustments to the size, without affecting the effects and objectives of this utility model, should still fall within the scope of the technical content disclosed in this utility model. Meanwhile, the terms such as "upper", "lower", "left", "right", "middle" and "one" used in this specification are only for clarity of description and are not intended to limit the scope of implementation of this utility model. Changes or adjustments to their relative relationships, without substantially altering the technical content, should also be considered as within the scope of implementation of this utility model.

[0028] Before describing the embodiments of this utility model in detail, the application environment of this utility model will be described first. The technology of this utility model is mainly applied to the field of dust concentration measurement technology. This utility model is used to solve the problem that existing dust concentration measuring devices do not have a self-cleaning function. After long-term use, dust easily adheres to the probe or pipeline, resulting in a decrease in measurement accuracy and requiring regular cleaning of the equipment, which increases the equipment maintenance cost.

[0029] Please combine Figures 1 to 3 As shown, this utility model provides a valve control system for a dust concentration measuring device.

[0030] In an exemplary embodiment of this application, the valve control system of the dust concentration measuring device includes a measuring chamber, a flue gas total pressure tapping pipe, a flue gas static pressure tapping pipe, a measuring chamber total pressure tapping pipe, a measuring chamber static pressure tapping pipe, a flue gas differential pressure sensor, and a measuring chamber differential pressure sensor. The valve control system includes:

[0031] The solenoid valve seat 1 is provided with a gas source passage 101, a flue gas total pressure output port 102, a flue gas static pressure output port 103, a measuring chamber total pressure output port 104, and a measuring chamber static pressure output port 105; the flue gas total pressure output port 102 and the flue gas static pressure output port 103 are both connected to the flue gas differential pressure sensor, and the measuring chamber total pressure output port 104 and the measuring chamber static pressure output port 105 are both connected to the measuring chamber differential pressure sensor;

[0032] The flue gas pressure solenoid valve 2 is connected to the flue gas pressure tapping pipe. The flue gas pressure solenoid valve 2 is used to switch the connection status between the flue gas pressure tapping pipe and the flue gas pressure output port 102 or the gas source passage 101.

[0033] The flue static pressure solenoid valve 3 is connected to the flue static pressure tapping pipe. The flue static pressure solenoid valve 3 is used to switch the connection status between the flue static pressure tapping pipe and the flue static pressure output port 103 or the gas source passage 101.

[0034] The total pressure solenoid valve 4 of the measuring chamber is connected to the total pressure tapping pipe of the measuring chamber. The total pressure solenoid valve 4 of the measuring chamber is used to switch the connection status between the total pressure tapping pipe of the measuring chamber and the total pressure output port 104 of the measuring chamber or the gas source passage 101.

[0035] The static pressure solenoid valve 5 of the measuring chamber is connected to the static pressure output port 105 of the measuring chamber. The static pressure solenoid valve 5 of the measuring chamber is used to switch the connection status between the static pressure tapping pipe of the measuring chamber and the static pressure output port 105 of the measuring chamber or the air source passage 101.

[0036] In this embodiment, during measurement, the total pressure tapping pipe of the flue is connected to the flue differential pressure sensor via the total pressure solenoid valve 2, and the static pressure tapping pipe of the flue is connected to the flue differential pressure sensor via the static pressure solenoid valve 3. The difference between the total pressure and the static pressure of the flue is measured by the flue differential pressure sensor to calculate the flue gas velocity. The total pressure tapping pipe of the measuring chamber is connected to the measuring chamber differential pressure sensor via the measuring chamber total pressure solenoid valve 4, and the static pressure tapping pipe of the measuring chamber is connected to the measuring chamber differential pressure sensor via the measuring chamber static pressure solenoid valve 5. The difference between the total pressure and the static pressure of the measuring chamber is measured by the measuring chamber differential pressure sensor to calculate the flue gas velocity in the measuring chamber. The feedback device adjusts the flue gas velocity in the measuring chamber to be consistent with the flue gas velocity to eliminate the influence of the flue gas velocity on the measurement results. During purging, the total pressure solenoid valve 2 disconnects from the total pressure output port 102 of the flue and connects to the gas source passage 101. The system purges the flue gas total pressure tapping pipe by purging the flue gas static pressure solenoid valve 3, disconnecting it from the flue gas static pressure output port 103 and connecting it to the gas source passage 101. Similarly, the measuring chamber total pressure solenoid valve 4 disconnects it from the measuring chamber total pressure output port 104 and connects it to the gas source passage 101, purging the measuring chamber total pressure tapping pipe. Finally, the measuring chamber static pressure solenoid valve 5 disconnects it from the measuring chamber static pressure output port 105 and connects it to the gas source passage 101, purging the measuring chamber static pressure tapping pipe. By purging the flue gas total pressure tapping pipe, the flue gas static pressure tapping pipe, the measuring chamber total pressure tapping pipe, and the measuring chamber static pressure tapping pipe, the system effectively prevents particles in the flue gas from clogging the pipes, improving measurement accuracy. Furthermore, the valve control system enables the device to self-clean, effectively reducing labor intensity and improving cleaning efficiency.

[0037] In an exemplary embodiment of this application, a buffer chamber 6 is also included, which is connected to the air source passage 101.

[0038] In this embodiment, the buffer chamber 6 is used to buffer the intake pressure of the air source entering the solenoid valve seat 1.

[0039] In an exemplary embodiment of this application, the buffer chamber 6 is provided with a pressure relief port 601.

[0040] In this embodiment, the pressure relief port 601 is used to relieve pressure in the buffer chamber 6.

[0041] In an exemplary embodiment of this application, the measuring chamber is provided with a window for the measuring beam to enter the measuring chamber, and the measuring chamber is provided with a purging component 7 corresponding to the window, which is used to purge the window.

[0042] In this embodiment, the purging component 7 purifies the window plate, which can prevent dust particles in the flue gas from accumulating on the window plate, ensure that the measuring beam can enter the measuring chamber, and ensure that the device can perform dust concentration measurement operations normally.

[0043] In an exemplary embodiment of this application, a purge solenoid valve 8 is also included. The purge solenoid valve 8 is connected to the purge component 7 and is used to connect or disconnect the purge component 7 from the air source passage 101.

[0044] In this embodiment, during measurement, the purge solenoid valve 8 disconnects the purge component 7 from the air source passage 101; during purge, the purge solenoid valve 8 connects the purge component 7 to the air source passage 101, thereby achieving the cleaning of the window plate.

[0045] In an exemplary embodiment of this application, the purging component 7 is provided with a light-transmitting hole 701 along the axial direction, and the light-transmitting hole 701 is correspondingly disposed with the window piece.

[0046] In this embodiment, the measurement beam enters the measurement chamber through the window, and the purge component 7 is disposed inside the measurement chamber and is disposed corresponding to the window. By opening a light-transmitting hole 701 on the purge component 7, the measurement beam can pass through the purge component 7, and the purge component 7 can be avoided from affecting the path of the measurement beam.

[0047] In an exemplary embodiment of this application, a plurality of purge channels 702 are distributed on the purge component 7. The purge channels 702 are opened radially along the purge component 7. The purge channels 702 are connected to the light-transmitting hole 701 and the purge solenoid valve 8.

[0048] In this embodiment, the window plate, which is coaxially arranged with the light-transmitting hole 701, is cleaned by multiple purge channels 702 opened radially along the measuring component. This enables comprehensive cleaning of the window plate and avoids the problem of blind spots in cleaning that could affect the path of the measuring beam.

[0049] In an exemplary embodiment of this application, the solenoid valve seat 1 is provided with an air inlet connector 106, which is used to connect to an air source and is connected to the air source passage 101.

[0050] In this embodiment, the air intake connector 106 is a three-way connector, including a working port, a spare port and a connecting port. When working, the connecting port is connected to the air source passage 101, the working port is connected to the air source, and the spare port is blocked. When the working port malfunctions, the spare port is activated to replace the working port.

[0051] In an exemplary embodiment of this application, the solenoid valve seat 1 is further provided with a purge output port, and the purge output port is provided with a plug 107.

[0052] In this embodiment, during measurement, the purge solenoid valve 8 switches the purge component 7 to be connected to the purge output port, and the purge output port is blocked by the plug 107. During purge, the purge solenoid valve 8 switches the purge component 7 to be connected to the air source passage 101.

[0053] In one exemplary embodiment of this application, the plug 107 is threadedly connected to the solenoid valve.

[0054] Working principle: In measurement mode, the total pressure tapping pipe of the flue is connected to the flue differential pressure sensor through the total pressure solenoid valve 2, and the static pressure tapping pipe of the flue is connected to the flue differential pressure sensor through the static pressure solenoid valve 3. The flue differential pressure sensor measures the difference between the total pressure and the static pressure of the flue, and calculates the flue gas velocity. The total pressure tapping pipe of the measuring chamber is connected to the measuring chamber differential pressure sensor through the measuring chamber total pressure solenoid valve 4, and the static pressure tapping pipe of the measuring chamber is connected to the measuring chamber differential pressure sensor through the measuring chamber static pressure solenoid valve 5. The measuring chamber differential pressure sensor measures the difference between the total pressure and the static pressure of the measuring chamber, and calculates the flue gas velocity in the measuring chamber. The feedback device adjusts the flue gas velocity in the measuring chamber to match the flue gas velocity to eliminate the influence of the flue gas velocity on the measurement results. In purging mode, the total pressure solenoid valve 2 disconnects from the total pressure output port 102 of the flue and connects to the gas source passage 101. The system purges the flue gas total pressure tapping pipe; the flue gas static pressure solenoid valve 3 disconnects from the flue gas static pressure output port 103 and connects to the gas source passage 101, purging the flue gas static pressure tapping pipe; the measuring chamber total pressure solenoid valve 4 disconnects from the measuring chamber total pressure output port 104 and connects to the gas source passage 101, purging the measuring chamber total pressure tapping pipe; the measuring chamber static pressure solenoid valve 5 disconnects from the measuring chamber static pressure output port 105 and connects to the gas source passage 101, purging the measuring chamber static pressure tapping pipe. By purging the flue gas total pressure tapping pipe, the flue gas static pressure tapping pipe, the measuring chamber total pressure tapping pipe, and the measuring chamber static pressure tapping pipe, it is possible to effectively prevent particles in the flue gas from clogging the pipes, improve measurement accuracy, and, through the valve control system, realize the self-cleaning function of the device, effectively reducing the labor intensity of personnel and improving cleaning efficiency.

[0055] The above embodiments are merely illustrative of the principles and effects of this utility model and are not intended to limit the scope of this utility model. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of this utility model. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in this utility model should still be covered by the claims of this utility model.

Claims

1. A valve control system for a dust concentration measuring device, comprising a measuring chamber, a flue gas total pressure tapping pipe, a flue gas static pressure tapping pipe, a measuring chamber total pressure tapping pipe, a measuring chamber static pressure tapping pipe, a flue gas differential pressure sensor, and a measuring chamber differential pressure sensor, characterized in that, The valve control system includes: The solenoid valve seat is provided with a gas source passage, a flue gas total pressure output port, a flue gas static pressure output port, a measuring chamber total pressure output port, and a measuring chamber static pressure output port; the flue gas total pressure output port and the flue gas static pressure output port are both connected to the flue gas differential pressure sensor, and the measuring chamber total pressure output port and the measuring chamber static pressure output port are both connected to the measuring chamber differential pressure sensor; A flue full pressure solenoid valve is connected to the flue full pressure tapping pipe. The flue full pressure solenoid valve is used to switch the connection status between the flue full pressure tapping pipe and the flue full pressure output port or the gas source passage. A flue static pressure solenoid valve is connected to the flue static pressure tapping pipe. The flue static pressure solenoid valve is used to switch the connection status between the flue static pressure tapping pipe and the flue static pressure output port or the gas source passage. A total pressure solenoid valve for measuring chamber is connected to the total pressure tapping pipe of the measuring chamber. The total pressure solenoid valve for measuring chamber is used to switch the connection status of the total pressure tapping pipe of the measuring chamber with the total pressure output port of the measuring chamber or the gas source passage. The measuring chamber static pressure solenoid valve is connected to the measuring chamber static pressure output port. The measuring chamber static pressure solenoid valve is used to switch the connection status of the measuring chamber static pressure tapping pipe with the measuring chamber static pressure output port or the gas source passage.

2. The valve control system of the dust concentration measuring device according to claim 1, characterized in that: It also includes a buffer chamber, which is connected to the gas source passage.

3. The valve control system of the dust concentration measuring device according to claim 2, characterized in that: The buffer chamber is equipped with a pressure relief port.

4. The valve control system of the dust concentration measuring device according to claim 1, characterized in that: The measuring chamber is provided with a window for the measuring beam to enter the measuring chamber, and the measuring chamber is provided with a purging component corresponding to the window, which is used to purge the window.

5. The valve control system of the dust concentration measuring device according to claim 4, characterized in that: It also includes a purge solenoid valve, which is connected to the purge component and is used to connect or disconnect the purge component from the air source passage.

6. The valve control system of the dust concentration measuring device according to claim 5, characterized in that: The purging component is provided with a light-transmitting hole along the axial direction, and the light-transmitting hole is correspondingly arranged with the window plate.

7. The valve control system of the dust concentration measuring device according to claim 6, characterized in that: The purging component has multiple purging channels distributed on it. The purging channels are opened radially along the purging component. The purging channels are connected to the light-transmitting holes and the purging solenoid valve.

8. The valve control system of the dust concentration measuring device according to claim 1, characterized in that: The solenoid valve seat is provided with an air inlet connector, which is used to connect to an air source and is connected to the air source passage.

9. The valve control system of the dust concentration measuring device according to claim 1, characterized in that: The solenoid valve seat is also provided with a purge output port, and the purge output port is provided with a plug.

10. The valve control system of the dust concentration measuring device according to claim 9, characterized in that: The plug is threadedly connected to the solenoid valve.

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