Measuring chamber structure of dust concentration measuring device

Abstract

The utility model relates to a measuring chamber structure of a dust concentration measuring device, which comprises a gas inlet pipe and a gas outlet pipe, and the measuring chamber structure comprises a flue gas cavity communicated with the gas inlet pipe and the gas outlet pipe, and the side wall of the flue gas cavity is provided with a channel; a first air curtain cavity and a second air curtain cavity are formed in the two ends of the smoke cavity in the axial direction respectively, the first air curtain cavity is communicated with an air source, and the second air curtain cavity is communicated with the first air curtain cavity through a channel; the first air curtain cavity is provided with a diaphragm and a light through hole; and the second air curtain cavity is provided with a light-passing window. A light source enters the flue gas cavity through the window piece and the light through hole, is scattered with flue gas dust particles and then emits light through the light through window, and the dust concentration in flue gas can be calculated by measuring the intensity of scattered light. By introducing high-pressure gas into the first gas curtain cavity, gas curtain barriers can be formed at the two ends of the smoke cavity in the first gas curtain cavity and the second gas curtain cavity, so that external dust particles or moisture is prevented from permeating from the light through hole or the light through window, and the accuracy of a measurement result is ensured.

Description

Technical Field

[0001] This utility model relates to the field of dust concentration measurement technology, and in particular to the measurement chamber structure of a dust concentration measuring device. Background Technology

[0002] The core principle of a light-scattering dust concentration measuring device is to measure the dust concentration in the air using the phenomenon of light scattering. When light passes through a gaseous medium containing dust particles, the dust particles scatter the light, and the intensity of the scattered light is positively correlated with the concentration of dust particles. Based on this principle, the dust concentration in the air can be calculated by measuring the intensity of the scattered light.

[0003] Currently, existing dust concentration measuring devices guide flue gas from the flue into a chamber within the device. A light source then passes through this chamber to measure the dust concentration. To ensure the optical path can pass smoothly through the chamber, a through-hole is provided. However, external dust particles or moisture can easily enter the chamber through this through-hole, affecting the measurement results. 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 measuring chamber structure for a dust concentration measuring device, which solves the problem that in the existing dust concentration measuring device, external dust particles or moisture can easily enter the flue gas chamber through the through hole, affecting the measurement results.

[0005] To achieve the above and other related objectives, this utility model provides a measuring chamber structure for a dust concentration measuring device, including an inlet pipe and an exhaust pipe. The inlet pipe is used to introduce flue gas from the flue into the device, and the exhaust pipe is used to discharge the flue gas from the device. The measuring chamber structure includes:

[0006] The flue gas chamber is connected to the air inlet pipe and the exhaust pipe, and a channel is provided on the side wall of the flue gas chamber;

[0007] The first air curtain cavity is located at one end of the flue gas cavity along the axial direction. The two ends of the first air curtain cavity along the axial direction are respectively provided with window plates and light-transmitting holes. The window plates are used for light to enter the measuring chamber and the light-transmitting holes are used for light to enter the flue gas cavity. The first air curtain cavity is connected to the gas source.

[0008] The second air curtain cavity is located at one end of the flue gas cavity away from the first air curtain cavity along the axial direction. The second air curtain cavity is provided with a light-transmitting window for emitting light from the flue gas cavity. The second air curtain cavity is connected to the first air curtain cavity through the channel.

[0009] Optionally, both the first air curtain cavity and the second air curtain cavity are provided with ventilation holes coaxially with the channel, and the ventilation holes are connected to the channel.

[0010] Optionally, both the first air curtain cavity and the second air curtain cavity are provided with a first sealing groove, and the first sealing groove is used to install a first sealing component, which is used to seal the connection between the vent and the channel.

[0011] Optionally, the first air curtain cavity and the second air curtain cavity are connected to the flue gas cavity through a locking member. The first air curtain cavity and the second air curtain cavity are each provided with a second sealing groove. The second sealing groove is used to install a second sealing component. The second sealing component is used to seal the connection between the first air curtain cavity, the second air curtain cavity and the flue gas cavity.

[0012] Optionally, an observation window is provided on the flue gas chamber, and a cover plate is provided on the flue gas chamber corresponding to the observation window. The cover plate is detachably connected to the flue gas chamber.

[0013] Optionally, the flue gas chamber is provided with a third sealing groove around the observation window. The third sealing groove is used to install a third sealing component, which is used to seal the connection between the cover plate and the flue gas chamber.

[0014] Optionally, the first air curtain cavity and the light-transmitting hole are coaxially provided with a light-entry hole, and the window plate is provided corresponding to the light-entry hole.

[0015] Optionally, the window is a transparent window.

[0016] Optionally, the first air curtain cavity is provided with a fourth sealing groove, the fourth sealing groove is used to install a fourth sealing component, and the fourth sealing component is used to seal the connection between the window plate and the light inlet hole.

[0017] Optionally, a blowing component is provided in the first air curtain cavity corresponding to the window plate. The blowing component is connected to the first air curtain cavity through a locking component. The blowing component and the light inlet are coaxially provided with a light-transmitting hole. The blowing component has multiple air channels in the radial direction, and the air channels are connected to the light-transmitting hole.

[0018] As described above, this utility model has the following beneficial effects: the light source enters the first air curtain cavity through the window and then enters the flue gas cavity through the light-transmitting hole. After the light source is scattered by the flue gas dust particles in the flue gas cavity, the light is emitted through the light-transmitting window. By measuring the intensity of the scattered light, the dust concentration in the flue gas can be calculated. Since the second air curtain cavity is connected to the first air curtain cavity through the channel, and the first air curtain cavity is connected to the gas source, by introducing high-pressure gas into the first air curtain cavity, air curtain barriers can be formed at both ends of the flue gas cavity in the first and second air curtain cavities, thereby preventing external dust particles or moisture from seeping in through the light-transmitting hole or light-transmitting window, thus ensuring the accuracy of the measurement results. Attached Figure Description

[0019] Figure 1 The diagram shown is a cross-sectional schematic of the measuring chamber structure of the dust concentration measuring device shown in an embodiment of this application.

[0020] Figure 2 The diagram shown is a cross-sectional view of the purging component as illustrated in an embodiment of this application.

[0021] Explanation of reference numerals in the attached figures

[0022] Smoke chamber 1, channel 101, first air curtain chamber 2, window 201, light-transmitting hole 202, light-entry hole 203, second air curtain chamber 3, light-transmitting window 301, vent 4, first sealing component 5, second sealing component 6, observation window 7, cover plate 8, third sealing component 9, fourth sealing component 10, purging component 11, light-transmitting hole 1101, air passage 1102. Detailed Implementation

[0023] 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.

[0024] Please see Figures 1 to 2It 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.

[0025] 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 in existing dust concentration measuring devices, flue gas easily leaks from the through hole of the flue gas chamber during the measurement process, affecting the measurement results.

[0026] Please combine Figures 1 to 2 As shown, this utility model provides a measuring chamber structure for a dust concentration measuring device.

[0027] In an exemplary embodiment of this application, the measuring chamber structure of the dust concentration measuring device includes an inlet pipe and an exhaust pipe. The inlet pipe is used to introduce flue gas from the flue into the device, and the exhaust pipe is used to discharge flue gas from the device. The measuring chamber structure includes:

[0028] The flue gas chamber 1 is connected to the air inlet pipe and the exhaust pipe, and a channel 101 is provided on the side wall of the flue gas chamber 1;

[0029] The first air curtain cavity 2 is located at one end of the flue gas cavity 1 along the axial direction. The two ends of the first air curtain cavity 2 along the axial direction are respectively provided with window 201 and light-transmitting hole 202. The window 201 is used for the light path to enter the measurement chamber, and the light-transmitting hole 202 is used for the light path to enter the flue gas cavity 1. The first air curtain cavity 2 is connected to the gas source.

[0030] The second air curtain cavity 3 is located at the end of the flue gas cavity 1 away from the first air curtain cavity 2 along the axial direction. The second air curtain cavity 3 is provided with a light transmission window 301, which is used for light to be emitted from the flue gas cavity 1. The second air curtain cavity 3 is connected to the first air curtain cavity 2 through the channel 101.

[0031] In this embodiment, the light source enters the first air curtain cavity 2 through the window 201, and then enters the flue gas cavity 1 through the light transmission hole 202. After the light source is scattered by the flue gas dust particles in the flue gas cavity 1, it exits through the light transmission window 301. By measuring the intensity of the scattered light, the dust concentration in the flue gas can be calculated. Since the second air curtain cavity 3 is connected to the first air curtain cavity 2 through the channel 101, and the first air curtain cavity 2 is connected to the gas source, by introducing high-pressure gas into the first air curtain cavity 2, air curtain barriers can be formed at both ends of the flue gas cavity 1 in the first air curtain cavity 2 and the second air curtain cavity 3, thereby preventing external dust particles or moisture from seeping in through the light transmission hole 202 or the light transmission window 301, thus ensuring the accuracy of the measurement results.

[0032] It is worth noting that the first air curtain cavity 2 is provided with two windows 201 and two light-transmitting holes 202 in parallel along the radial direction, which are used to pass through the measurement beam and the calibration beam, respectively. The measurement beam is used to measure the dust concentration, and the calibration beam is used to compensate for changes in the light source intensity to ensure the accuracy of the measurement results. The second air curtain cavity 3 is provided with a converging lens and a light trap. The converging lens is used to collect the scattered light emitted from the light-transmitting window 301 in the flue gas cavity 1, and the light trap is used to receive the measurement beam that has not been scattered. The calibration beam does not scatter and directly passes through the converging lens to be received by the receiver.

[0033] In an exemplary embodiment of this application, ventilation holes 4 are coaxially provided on the first air curtain cavity 2 and the second air curtain cavity 3 with the channel 101, and the ventilation holes 4 are connected to the channel 101.

[0034] In this embodiment, the vent 4 is connected to the channel 101, which facilitates the gas in the first air curtain cavity 2 to flow into the second air curtain cavity 3, thereby forming an air curtain barrier in the first air curtain cavity 2 and the second air curtain cavity 3.

[0035] In an exemplary embodiment of this application, a first sealing groove is provided on both the first air curtain cavity 2 and the second air curtain cavity 3. The first sealing groove is used to install a first sealing component 5, which is used to seal the connection between the vent hole 4 and the channel 101.

[0036] In this embodiment, by providing the first sealing component 5, gas is prevented from leaking into the flue gas chamber 1 and affecting the flue gas flow rate inside the flue gas chamber 1.

[0037] In an exemplary embodiment of this application, the first air curtain cavity 2 and the second air curtain cavity 3 are connected to the smoke chamber 1 by a locking member. The first air curtain cavity 2 and the second air curtain cavity 3 are each provided with a second sealing groove. The second sealing groove is used to install a second sealing component 6. The second sealing component 6 is used to seal the connection between the first air curtain cavity 2, the second air curtain cavity 3 and the smoke chamber 1.

[0038] In this embodiment, by providing a second sealing component 6, leakage of flue gas into the flue gas chamber 1 is prevented.

[0039] In an exemplary embodiment of this application, an observation window 7 is provided on the flue gas chamber 1, and a cover plate 8 is provided on the flue gas chamber 1 corresponding to the observation window 7. The cover plate 8 is detachably connected to the flue gas chamber 1.

[0040] In this embodiment, staff can manually clean the inside of the flue gas chamber 1 by removing the cover plate 8 and observing the window 7.

[0041] In an exemplary embodiment of this application, the flue gas chamber 1 is provided with a third sealing groove around the observation window 7. The third sealing groove is used to install a third sealing component 9, and the third sealing component 9 is used to seal the connection between the cover plate 8 and the flue gas chamber 1.

[0042] In this embodiment, by providing a third sealing component 9, leakage of flue gas from the connection between the cover plate 8 and the flue gas chamber 1 is prevented.

[0043] In an exemplary embodiment of this application, a light inlet hole 203 is coaxially provided with the first air curtain cavity 2 and the light inlet hole 202, and the window piece 201 is provided corresponding to the light inlet hole 203.

[0044] In this embodiment, the light inlet 203 is opened along the axial direction of the first air curtain cavity 2 and communicates with the first air curtain cavity 2. The light inlet 203 is blocked by setting a window piece 201 inside the first air curtain cavity 2 corresponding to the light inlet 203.

[0045] In an exemplary embodiment of this application, the window 201 is a transparent window 201.

[0046] In this embodiment, the window 201 is made of transparent material to facilitate the entry of light beams into the measurement chamber.

[0047] In an exemplary embodiment of this application, a fourth sealing groove is provided on the first air curtain cavity 2. The fourth sealing groove is used to install a fourth sealing component 10. The fourth sealing component 10 is used to seal the connection between the window piece 201 and the light inlet hole 203.

[0048] In this embodiment, by providing a fourth sealing component 10, gas leakage from the window plate 201 position within the first air curtain cavity 2 is prevented.

[0049] In an exemplary embodiment of this application, a blowing component 11 is provided in the first air curtain cavity 2 corresponding to the window 201. The blowing component 11 is connected to the first air curtain cavity 2 through a locking member. The blowing component 11 and the light inlet 203 are coaxially provided with a light transmission hole 1101. The blowing component 11 is provided with multiple air channels 1102 in the radial direction. The air channels 1102 are connected to the light transmission hole 1101.

[0050] In this embodiment, the gas is gathered at the position of the light-transmitting hole 1101 by multiple air channels 1102 arranged radially by the purging component 11 to purge the window plate 201, so as to avoid the window plate 201 being blocked or covered with dust, which would affect the light entering the measurement chamber.

[0051] Working principle: The light source enters the first air curtain cavity 2 through the window 201, and then enters the flue gas cavity 1 through the light transmission hole 202. The light source is scattered by the flue gas dust particles in the flue gas cavity 1 and then emitted through the light transmission window 301. By measuring the intensity of the scattered light, the dust concentration in the flue gas can be calculated. Since the second air curtain cavity 3 is connected to the first air curtain cavity 2 through the channel 101, and the first air curtain cavity 2 is connected to the gas source, by introducing high-pressure gas into the first air curtain cavity 2, air curtain barriers can be formed at both ends of the flue gas cavity 1 in the first air curtain cavity 2 and the second air curtain cavity 3, thereby preventing external dust particles or moisture from seeping in through the light transmission hole 202 or the light transmission window 301, thus ensuring the accuracy of the measurement results.

[0052] 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 measuring chamber structure of a dust concentration measuring device, comprising an air inlet pipe for introducing flue gas in a flue into the device and an air outlet pipe for discharging the flue gas in the device, characterized in that, The measurement chamber structure comprises: A flue gas cavity in communication with the air inlet pipe and the air outlet pipe, a side wall of the flue gas cavity being provided with a passage; A first gas curtain cavity arranged at one end of the flue gas cavity along an axial direction, both ends of the first gas curtain cavity along the axial direction being provided with a window sheet and a light transmission hole respectively, the window sheet being used for light path entering the measurement chamber, and the light transmission hole being used for light path entering the flue gas cavity, the first gas curtain cavity being in communication with a gas source; A second gas curtain cavity arranged at one end of the flue gas cavity away from the first gas curtain cavity along the axial direction, the second gas curtain cavity being provided with a light transmission window, the light transmission window being used for light emission of the flue gas cavity, and the second gas curtain cavity being in communication with the first gas curtain cavity through the passage.

2. The measurement chamber structure of a dust concentration measuring device according to claim 1, characterized in that: Air holes coaxial with the passage are arranged on the first gas curtain cavity and the second gas curtain cavity.

3. The measurement chamber structure of a dust concentration measuring apparatus according to claim 2, characterized in that: First sealing grooves are arranged on the first gas curtain cavity and the second gas curtain cavity, first sealing components are arranged in the first sealing grooves, and the first sealing components are used for sealing the connection between the air holes and the passage.

4. The measurement chamber structure of a dust concentration measuring apparatus according to claim 3, characterized in that: The first gas curtain cavity and the second gas curtain cavity are connected with the flue gas cavity through locking members, second sealing grooves are arranged on the first gas curtain cavity and the second gas curtain cavity, second sealing components are arranged in the second sealing grooves, and the second sealing components are used for sealing the connection between the first gas curtain cavity, the second gas curtain cavity and the flue gas cavity.

5. The measurement chamber structure of a dust concentration measuring apparatus according to claim 1, characterized by: An observation window is arranged on the flue gas cavity, the flue gas cavity is provided with a cover plate corresponding to the observation window, and the cover plate is detachably connected with the flue gas cavity.

6. The measurement chamber structure of a dust concentration measuring apparatus according to claim 5, characterized in that: A third sealing groove is arranged on the flue gas cavity around the observation window, a third sealing component is arranged in the third sealing groove, and the third sealing component is used for sealing the connection between the cover plate and the flue gas cavity.

7. The measurement chamber structure of a dust concentration measuring apparatus according to claim 1, characterized by: The first gas curtain cavity is coaxially provided with a light inlet hole corresponding to the light transmission hole, and the window sheet is arranged corresponding to the light inlet hole.

8. The measurement chamber structure of a dust concentration measuring apparatus according to claim 7, characterized in that: The window sheet is a transparent window sheet.

9. The measurement chamber structure of a dust concentration measuring apparatus according to claim 8, characterized in that: A fourth sealing groove is arranged on the first gas curtain cavity, a fourth sealing component is arranged in the fourth sealing groove, and the fourth sealing component is used for sealing the connection between the window sheet and the light inlet hole.

10. The measurement chamber structure of a dust concentration measuring apparatus according to claim 9, characterized in that: A purge component is arranged in the first gas curtain cavity corresponding to the window sheet, the purge component is connected with the first gas curtain cavity through a locking member, the purge component is coaxially provided with a light transmission hole corresponding to the light inlet hole, the purge component is radially provided with a plurality of air channels, and the air channels are in communication with the light transmission hole.

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