A dust concentration measuring device capable of drying intake air
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- HEFEI SHUOJIA ELECTRONIC TECH CO LTD
- Filing Date
- 2025-07-28
- Publication Date
- 2026-06-16
Smart Images
Figure CN224365925U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of dust concentration measurement technology, specifically to a dust concentration measuring device with a dry air intake. Background Technology
[0002] Dust concentration measurement is crucial in industrial production (such as mining, cement, and metallurgy), environmental monitoring (PM2.5 / PM10 monitoring), and occupational health (workplace dust exposure assessment). High-precision and stable measurements can ensure production safety, environmental pollution control, and personnel health.
[0003] Currently, common methods for measuring dust concentration include light scattering, beta-ray scattering, and gravimetric analysis. Among these, light scattering is widely used due to its advantages such as fast response and real-time monitoring. However, in actual measurement processes, water vapor in the gas being measured can scatter or absorb light along with dust particles, leading to an amplification of the optical sensor's detection signal and resulting in inflated measurement results. Furthermore, as the gas moves within the sampling pipe, water vapor adhering to the pipe increases the probability of dust adhering to it, further affecting the dust concentration detection results. Utility Model Content
[0004] This invention provides a dust concentration measuring device with a dryable intake air, which solves the problem mentioned in the background art that water vapor in the gas to be measured will affect the dust concentration measurement results, and that water vapor adhering to the sampling pipe increases the probability of dust adhering to the sampling pipe, further affecting the dust concentration detection results.
[0005] This utility model provides the following technical solution: a dust concentration measuring device with dryable intake air, comprising a dust concentration detector body, a cavity provided on the dust concentration detector body, an intake pipe provided in the inner cavity of the cavity, one end of the intake pipe extending to the outside of the dust concentration detector body, and the other end of the intake pipe extending to the detection chamber of the dust concentration detector body, an intake drying structure provided in the cavity, the intake drying structure comprising an air circulation heating unit, a hot air pipe connected to the air outlet of the air circulation heating unit, a dehumidifier connected to the air inlet of the air circulation heating unit, a return pipe connected to the air inlet of the dehumidifier, and a circulation channel uniformly sleeved on the outer ring of the intake pipe, one end of the circulation channel connected to the hot air pipe, the other end of the circulation channel connected to the return pipe, and a microporous membrane provided on the inner wall of the circulation channel, the microporous membrane being connected to the inner wall of the intake pipe.
[0006] Preferably, the air intake pipe is movably connected to the cavity, and a driving structure is provided inside the cavity, through which the air intake pipe is driven.
[0007] Preferably, a one-way valve is provided at the other end of the circulation channel, and a humidity sensor is provided at the other end of the circulation channel located below.
[0008] Preferably, the dehumidifier is snapped onto one side of the dust concentration detector body. The dehumidifier includes a housing with a U-shaped groove inside. The U-shaped groove is filled with a dehumidifying filter element. The top of the air inlet of the dehumidifier is provided with an air inlet hole adapted to the air outlet of the return pipe. The air outlet of the dehumidifier is provided with an air outlet hole adapted to the air inlet of the air circulation heating unit. The dehumidifying filter element is located between the air inlet hole and the air outlet hole. An exhaust channel is provided on the side wall of the U-shaped groove away from the air inlet hole. The air inlet of the exhaust channel is located at the air outlet of the dehumidifier. The dust concentration detector body is provided with a first electric ball valve, and the air outlet of the exhaust channel is connected to the outside through the first electric ball valve.
[0009] Preferably, a second electric ball valve is provided at both the air outlet of the return pipe and the air inlet of the air circulation heating unit.
[0010] Preferably, the dust concentration detector body is provided with a regeneration box, the inner cavity of the regeneration box is provided with a blower, the air inlet of the blower is connected to the outside through an air inlet pipe, both ends of the air inlet pipe are provided with temperature sensors, the middle of the inner cavity of the air inlet pipe is provided with a heating wire, and the air outlet of the blower is connected to the air inlet of the dehumidifier through an air outlet pipe.
[0011] Compared with the prior art, the present invention has the following beneficial effects:
[0012] 1. This dust concentration measuring device with dryable air intake utilizes a microporous membrane to dehumidify the gas to be measured in the air intake pipe. During the dehumidification process, both the air intake pipe and the microporous membrane rotate, reducing the probability of dust adhesion and ensuring the accuracy of dust concentration detection. Furthermore, several circulation channels form an independent circulation cavity, which can ensure the temperature difference on both sides of the microporous membrane, thereby ensuring the dehumidification efficiency of the gas to be measured in this application.
[0013] 2. This dryable air intake dust concentration measuring device, through the setting of a regeneration box and a dehumidifier, and the operation of a blower, allows outside air to be blown into the dehumidifier. When the outside air passes through the heating wire, it is heated. When the hot air passes through the dehumidifier filter, the dehumidifier filter is regenerated, reducing the frequency of dehumidifier replacement and facilitating the use of this application. Attached Figure Description
[0014] Figure 1 This is a front view of the structure of this utility model;
[0015] Figure 2 This is a schematic diagram of the back of the structure of this utility model;
[0016] Figure 3 This is an exploded view of the structure of this utility model;
[0017] Figure 4 The structure of this utility model Figure 3 The diagram on the right;
[0018] Figure 5 This is a schematic diagram showing the connection between the air intake drying structure and the air intake pipe of this utility model.
[0019] Figure 6 The structure of this utility model Figure 5 Explosion diagram;
[0020] Figure 7 This is a schematic cross-sectional view of the dehumidifier structure of this utility model;
[0021] Figure 8 This is a schematic cross-sectional view of the regeneration box structure of this utility model.
[0022] In the diagram: 1. Dust concentration detector body; 2. Guide cover; 3. Air inlet pipe; 4. Cavity cover; 5. Humidity sensor; 6. Circulation channel; 7. Dehumidifier; 8. First electric ball valve; 9. Air inlet pipe; 10. Microporous membrane; 11. Air circulation heating unit; 12. Air outlet pipe; 13. Drive structure; 14. Regeneration box; 15. Return pipe; 16. Slot; 17. Hot air pipe; 18. Blower; 19. Dehumidifier filter element; 20. Air inlet; 21. Second electric ball valve; 22. Exhaust channel; 23. Cavity; 24. Air outlet; 25. Heating wire; 26. Housing; 27. Temperature sensor; 28. Sealing rod. Detailed Implementation
[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0024] This utility model provides an embodiment: Please refer to Figures 1-8A dust concentration measuring device with a dryable intake airflow includes a dust concentration detector body 1. A cavity 23 is provided on the dust concentration detector body 1, and an intake pipe 3 is disposed within the cavity 23. One end of the intake pipe 3 extends to the outside of the dust concentration detector body 1, and the other end extends to the detection chamber of the dust concentration detector body 1. The intake pipe 3 is movably connected to the cavity 23. A driving structure 13 is disposed within the cavity 23, and the intake pipe 3 is driven by the driving structure 13. Under the action of the driving structure 13, the intake pipe 3 can rotate. In use, during the flow of the gas to be measured through the intake pipe 3, the rotation of the intake pipe 3 can reduce the probability of dust adhering to the inner wall of the intake pipe 3, thereby improving the dust concentration detection accuracy. The driving structure 13 is existing technology and can achieve stable rotation and accurate positioning of the intake pipe 3. The dust concentration detector body 1 is existing technology. It uses a pump or negative pressure to draw in the gas to be tested, ensuring that the dust enters the detection chamber evenly. It uses methods such as light scattering, beta-ray method or electrostatic induction method to detect the dust concentration of the gas to be tested in the detection chamber. The specific model can be selected according to the requirements and is not limited here.
[0025] Cavity 23 is sealed by cavity cover 4, which is detachably connected to the dust concentration detector body 1. An air intake drying structure is installed inside cavity 23, comprising an air circulation heating unit 11, a hot air duct 17 connected to the air outlet of the air circulation heating unit 11, a dehumidifier 7 connected to the air inlet of the air circulation heating unit 11, a return pipe 15 connected to the air inlet of the dehumidifier 7, and a circulation channel 6 evenly fitted around the outer ring of the air intake pipe 3. The circulation channel 6 is movably connected to the air intake pipe 3. Then, one end of the circulation channel 6 is connected to the hot air pipe 17, and the other end of the circulation channel 6 is connected to the return pipe 15. The inner wall of the circulation channel 6 is provided with a microporous membrane 10. The intake pipe 3 is provided with a slot 16. The circulation channel 6 is located outside the slot 16, and the microporous membrane 10 is located inside the slot 16. The microporous membrane 10 is connected to the inner wall of the intake pipe 3. The microporous membrane 10 is annular, and the inner diameter of the microporous membrane 10 is the same as the inner diameter of the intake pipe 3. The other end of the circulation channel 6 is provided with a one-way valve. When the air intake drying structure is working, the air circulation heating unit 11 circulates hot air at a suitable temperature within the flow channel formed by the hot air duct 17, the circulation channel 6, and the return pipe 15. During the flow of hot air within the circulation channel 6, the probability of water vapor in the gas being tested passing through the microporous membrane 10 is increased, improving the dehumidification efficiency of the air being tested. Furthermore, the several circulation channels 6 form independent circulation chambers, ensuring the temperature difference across the microporous membrane 10, thereby guaranteeing the dehumidification efficiency of this application. The air circulation heating unit 11 is existing technology, satisfying the requirements of air circulation heating and precise temperature control. The microporous membrane 10 is existing technology, allowing only water vapor to pass through; the microporous membrane 10 can be selected according to requirements and is not limited here.
[0026] A humidity sensor 5 is installed at the other end of the lower circulation channel 6. The humidity sensor 5 can detect the humidity of the air discharged from the lower circulation channel 6. The controller of this application can determine the dehumidification effect of the air intake drying structure based on the detection result of the humidity sensor 5. Based on the dehumidification effect, the controller of this application can control the working frequency and hot air temperature of the air circulation heating unit 11 to ensure the dehumidification effect of the air intake drying structure.
[0027] A sealing rod 28 is provided between the two ends of the circulation channel 6. The inner wall of the sealing rod 28 and the inner wall of the circulation channel 6 form a ring that fits the outer wall of the intake pipe 3, so as to prevent gas leakage when the intake pipe 3 rotates.
[0028] During use, the gas in the return pipe 15 enters the dehumidifier 7, which dehumidifies the gas. The dehumidified air then enters the air circulation heating unit 11 for reheating to the set temperature, allowing the air to circulate.
[0029] Furthermore, the dehumidifier 7 is snapped into one side of the dust concentration detector body 1. A groove adapted to the dehumidifier 7 is provided on one side of the dust concentration detector body 1. The dehumidifier 7 is snapped into the inner cavity of the groove, which facilitates the disassembly and assembly of the dehumidifier 7. The dehumidifier 7 includes a housing 26, and a U-shaped groove is provided inside the housing 26. The U-shaped groove is filled with a dehumidifying filter element 19. The dehumidifying filter element 19 can adsorb moisture in the air to achieve dehumidification. The dehumidifying filter element 19 is existing technology, and it only needs to meet the requirements of being able to dehumidify the air by adsorption and being able to regenerate in a high-temperature environment.
[0030] The top of the air inlet of the dehumidifier 7 is provided with an air inlet hole 20 that is adapted to the air outlet of the return pipe 15. The air outlet of the dehumidifier 7 is provided with an air outlet hole 24 that is adapted to the air inlet of the air circulation heating unit 11. The dehumidifying filter element 19 is located between the air inlet hole 20 and the air outlet hole 24. When the dehumidifier 7 is engaged with the inner cavity of the groove, the air outlet of the return pipe 15 is in a tight fit with the top of the air inlet hole 20, and the air outlet hole 24 is in a tight fit with the air inlet of the air circulation heating unit 11. The air outlet of the return pipe 15 and the air inlet of the air circulation heating unit 11 are both provided with a second electric ball valve 21. When the second electric ball valve 21 is in the closed state, the inner cavity of the dehumidifier 7 can be in a sealed state, which facilitates the regeneration of the dehumidifying filter element 19.
[0031] An exhaust channel 22 is provided on the side wall of the U-shaped groove away from the air inlet 20. The air inlet end of the exhaust channel 22 is located at the air outlet end of the dehumidifier 7. A first electric ball valve 8 is provided on the dust concentration detector body 1. The air outlet end of the exhaust channel 22 is connected to the outside through the first electric ball valve 8. When the first electric ball valve 8 is in the open state, the gas in the dehumidifier 7 can be discharged through the exhaust channel 22 and the first electric ball valve 8.
[0032] A flow guide cover 2 is detachably connected to one side of the dust concentration detector body 1. A flow guide cavity is formed between the flow guide cover 2 and the dust concentration detector body 1. The air outlet of the first electric ball valve 8 is located in the flow guide cavity. An exhaust hole is provided at the bottom of the flow guide cavity. By setting the flow guide cover 2, the gas discharged from the first electric ball valve 8 can be guided, reducing the impact of the gas discharged from the first electric ball valve 8 on the sampling air intake.
[0033] The dust concentration detector body 1 is equipped with a regeneration box 14. A blower 18 is installed inside the regeneration box 14. The air inlet of the blower 18 is connected to the outside via an air inlet pipe 9. Temperature sensors 27 are installed at both ends of the air inlet pipe 9. A heating wire 25 is installed in the middle of the inner cavity of the air inlet pipe 9. The air outlet of the blower 18 is connected to the air inlet of the dehumidifier 7 via an air outlet pipe 12. Through the blower 18, outside air can enter the air inlet pipe 9. The air inlet of the air inlet pipe 9 is located at the air inlet end... Temperature sensor 27 detects the intake air temperature. The controller in this application controls the operation of heating wire 25 based on the intake air temperature. When outside air passes through heating wire 25, the heat emitted by the energized wire heats the air. The heated air, under the action of blower 18, enters the dehumidifier 7 along the outlet duct 12. When the hot air passes through the dehumidification filter element 19, it regenerates the filter element. Excess hot air is discharged through exhaust channel 22 and the first electric ball valve 8. The model of blower 18 can be selected according to requirements and is not limited here. Temperature sensor 27, located at the outlet end of the inlet duct 9, detects the temperature of the heated air, ensuring that the heated air temperature reaches the set value, facilitating the regeneration of the dehumidification filter element 19. A one-way valve is provided at one end of the outlet duct 12. After dehumidification, the first electric ball valve 8 is in the closed state, facilitating the use of the intake air drying structure.
[0034] As described above, this application utilizes a microporous membrane 10 to dehumidify the gas to be tested in the air inlet pipe 3. During the dehumidification process, both the air inlet pipe 3 and the microporous membrane 10 rotate, reducing the probability of dust adhesion and ensuring the accuracy of dust concentration detection by this device. Furthermore, the dehumidifier has an automatic regeneration function, which facilitates the use of this application.
[0035] All electrical components involved in this application are existing technologies. Those skilled in the art can select appropriate models of electrical components according to their needs. No restrictions or elaborations are made here. Those skilled in the art understand their connection methods. With the help of those skilled in the art, all electrical components in this application and their compatible power supplies are connected by wires. According to the actual situation, appropriate controllers are selected to meet control requirements. For specific connections and control sequences, please refer to the description below. The electrical connections between each electrical component are completed in the order of their operation. The detailed connection methods are well-known technologies in the art. The following mainly introduces the working principle and process, and will not describe the electrical control.
[0036] In summary: When using this dryable air intake dust concentration measuring device, the gas to be tested is drawn in by a pump or negative pressure to ensure that the dust enters the detection chamber evenly. The dust concentration of the gas to be tested in the detection chamber is detected by means of light scattering, beta-ray method or electrostatic induction method. During the flow of the gas to be tested in the air intake pipe 3, the water vapor in the gas to be tested passes through the microporous membrane 10 and enters the gas flowing in the circulation channel 6. The gas in the circulation channel 6 enters the dehumidifier 7 through the return pipe 15 for dehumidification. The dehumidified gas is then recycled through the air circulation heating unit 11. When dehumidification of dehumidifier 7 is required, the second electric ball valve 21 is closed, the blower 18 is working, and outside air can enter the air inlet pipe 9. The temperature sensor 27 located at the air inlet end of the air inlet pipe 9 detects the air inlet temperature. The controller of this application can control the operation of the heating wire 25 according to the air inlet temperature. When outside air passes through the heating wire 25, the heat emitted by the heating wire 25 when it is energized can heat the air. The heated air enters the dehumidifier 7 along the air outlet pipe 12 under the action of the blower 18. When the hot air passes through the dehumidification filter element 19, the dehumidification filter element 19 can be regenerated. Excess hot air is discharged through the exhaust channel 22 and the first electric ball valve 8.
[0037] All standard parts used in this utility model can be purchased from the market, and irregular parts can be customized according to the description and drawings. The specific connection methods of each structure adopt conventional technical means such as bolt connection that are mature in the prior art. The machinery, parts and equipment adopt conventional models in the prior art. The materials of each component can be selected according to the requirements and are not limited here. The contents not described in detail in this specification belong to the prior art known to those skilled in the art. Although the embodiments of this utility model have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of this utility model. The scope of this utility model is defined by the appended claims and their equivalents.
Claims
1. A dust concentration measuring device with dryable air intake, comprising a dust concentration detector body (1), characterized in that: The dust concentration detector body (1) is provided with a cavity (23). An air inlet pipe (3) is provided inside the cavity (23). One end of the air inlet pipe (3) extends to the outside of the dust concentration detector body (1), and the other end of the air inlet pipe (3) extends to the detection chamber of the dust concentration detector body (1). An air inlet drying structure is provided inside the cavity (23). The air inlet drying structure includes an air circulation heating unit (11) and a connection to the air outlet of the air circulation heating unit (11). The hot air duct (17), the dehumidifier (7) connected to the air inlet of the air circulation heating unit (11), the return pipe (15) connected to the air inlet of the dehumidifier (7), and the circulation channel (6) uniformly sleeved on the outer ring of the air inlet pipe (3) are provided. One end of the circulation channel (6) is connected to the hot air duct (17), and the other end of the circulation channel (6) is connected to the return pipe (15). The inner wall of the circulation channel (6) is provided with a microporous membrane (10), and the microporous membrane (10) is connected to the inner wall of the air inlet pipe (3).
2. The dust concentration measuring device with dryable air intake according to claim 1, characterized in that: The air intake pipe (3) is movably connected to the cavity (23), and a drive structure (13) is provided inside the cavity (23). The air intake pipe (3) is driven by the drive structure (13).
3. The dust concentration measuring device with dryable air intake according to claim 1, characterized in that: A one-way valve is provided at the other end of the circulation channel (6), and a humidity sensor (5) is provided at the other end of the circulation channel (6) located below.
4. The dust concentration measuring device with dryable air intake according to claim 1, characterized in that: The dehumidifier (7) is snapped onto one side of the dust concentration detector body (1). The dehumidifier (7) includes a housing (26), and a U-shaped groove is provided inside the housing (26). The U-shaped groove is filled with a dehumidifying filter element (19). The top of the air inlet end of the dehumidifier (7) is provided with an air inlet hole (20) adapted to the air outlet end of the return pipe (15). The air outlet end of the dehumidifier (7) is provided with an air outlet adapted to the air inlet end of the air circulation heating unit (11). The dehumidifying filter element (19) is located between the air inlet (20) and the air outlet (24). An exhaust channel (22) is provided on the side wall of the U-shaped groove away from the air inlet (20). The air inlet end of the exhaust channel (22) is located at the air outlet end of the dehumidifier (7). A first electric ball valve (8) is provided on the dust concentration detector body (1). The air outlet end of the exhaust channel (22) is connected to the outside through the first electric ball valve (8).
5. The dust concentration measuring device with dryable air intake according to claim 1, characterized in that: The air outlet of the return pipe (15) and the air inlet of the air circulation heating unit (11) are both equipped with a second electric ball valve (21).
6. The dust concentration measuring device with dryable air intake according to claim 4, characterized in that: The dust concentration detector body (1) is equipped with a regeneration box (14), and a blower (18) is installed in the inner cavity of the regeneration box (14). The air inlet of the blower (18) is connected to the outside through the air inlet pipe (9). Temperature sensors (27) are installed at both ends of the air inlet pipe (9). A heating wire (25) is installed in the middle of the inner cavity of the air inlet pipe (9). The air outlet of the blower (18) is connected to the air inlet of the dehumidifier (7) through the air outlet pipe (12).