Toxic combustible gas detection device
By employing a rotating airflow design with a conical guide and a spiral guide plate, along with an electromagnetic coil-driven filter cleaning system, the problems of dust accumulation and filter clogging are solved, enabling the toxic and combustible gas detection device to achieve high sensitivity and long service life.
Patent Information
- Application Number
- CN202511385373.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-09-26
- Publication Date
- 2025-10-31
- Estimated Expiration
- Not applicable · inactive patent
AI Technical Summary
Existing toxic and combustible gas detection devices are easily covered by dust in outdoor environments, leading to insensitive or ineffective detection. Furthermore, filter clogging requires frequent manual cleaning, resulting in a heavy maintenance burden and a limited service life.
The rotating airflow design, which combines a conical guide vane and a spiral guide plate, achieves gas-solid separation. The timed rotation of the filter and dust removal are achieved through a linkage structure between an electromagnetic coil and a filter drive disk. Combined with adjustable airflow control, this ensures high sensitivity and long lifespan of the sensor.
It significantly reduces dust interference with sensors, extends the lifespan of filters and sensors, improves detection accuracy and stability, and reduces maintenance frequency and costs.
Smart Images
Figure CN120869749A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of gas detection technology, specifically to a toxic and combustible gas detection device. Background Technology
[0002] Existing toxic and flammable gas detection devices are mostly single-type detection structures, meaning that external gas is directly introduced into the sensor for concentration analysis through a simple air intake channel. While these devices can meet basic detection requirements, they generally have the following shortcomings: First, in environments with long-term outdoor exposure, the air often contains a large amount of dust, fibers, or other solid particles (such as sand and dust). Traditional devices lack a proper gas-solid separation structure, making the sensor easily covered by dust, leading to insensitive detection or even complete failure. Second, existing devices often rely on static filters to block particulate matter, but once the filter becomes clogged, it requires frequent manual replacement or cleaning, resulting in a heavy maintenance burden and long downtime. Traditional gas detectors lack automatic cleaning functions during long-term operation, resulting in a limited lifespan. Summary of the Invention
[0003] To overcome the shortcomings of the prior art, the present invention provides the following technical solution: a toxic and combustible gas detection device, comprising a meter head, a detection cylinder fixedly mounted on the meter head via a connecting exhaust pipe, an air inlet and a separation air outlet respectively opened at the bottom and top of the detection cylinder, wherein a guide fan blade is rotatably mounted on the inner wall of the detection cylinder at the air inlet position, and an air intake fan blade is fixedly mounted on the guide fan blade; a conical guide body is coaxially suspended and fixed in the middle of the inner wall of the detection cylinder, and a gap is left between the circumferential edge of the conical guide body and the inner wall of the detection cylinder; an isolation support ring is fixedly mounted on the top of the inner wall of the detection cylinder, the isolation support ring is located above the separation air outlet, a driving cone is fixedly mounted on the isolation support ring, a separation air intake channel is opened at the axial center of the driving cone, and an air intake blade is rotatably mounted in the separation air intake channel; wherein multiple spiral guide plates are fixedly mounted in a circular array on the lower surface of the conical guide body, a main shaft is rotatably mounted at the axial center of the conical guide body, and the bottom end of the main shaft is fixedly engaged with the guide fan blade.
[0004] Preferably, a disc-shaped support is fixedly installed on the driving cone, and the disc-shaped support has a plurality of fourth openings arranged in a circular array. A filter screen plate is also rotatably installed on the disc-shaped support, and the filter screen plate has a third opening in a circular array with the same number and shape as the fourth openings. A filter screen is provided between the filter screen plate and the opposite surface of the disc-shaped support in a rotatable fit.
[0005] Preferably, a filter drive disk is rotatably mounted at the center of the upper surface of the disc-shaped support. The filter drive disk is fixedly engaged with the filter screen. A central gear is rotatably engaged at the center of the filter drive disk. A toothed ring is concentrically engaged on the outer side of the central gear. The toothed ring and the central gear are driven by multiple distribution gears. All distribution gears are rotatably mounted on the filter drive disk.
[0006] Preferably, the central gear and the intake blade are synchronously driven by a fixed tube shaft, and both the tube shaft and the intake blade are rotatably sleeved on the main shaft. The tube shaft is rotatably engaged with the disc-shaped support and the filter drive disc. A drive disc is coaxially fixed on the gear ring, and the drive disc is fixedly sleeved on the main shaft.
[0007] Preferably, a dust hood is fixedly embedded in the driving cone, and a dust exhaust pipe is fixedly connected to the dust hood. The bottom end of the dust exhaust pipe passes through the conical guide and extends to the bottom of the conical guide. The bottom end of the dust exhaust pipe also passes through the circumferential surface of the detection cylinder and extends to the outside of the detection cylinder. The top end of the dust hood is fixedly connected to one of the fourth openings.
[0008] Preferably, a top cover plate is coaxially mounted above the isolation support ring. The top cover plate is fixed to the top of the detection cylinder. A gap is left between the top cover plate and the filter screen buckle plate, and multiple toxic and combustible gas sensors are fixedly installed in the gap.
[0009] Preferably, the top cover plate is coaxially rotatably mounted with an adjusting plate, and the adjusting plate and the top cover plate are respectively provided with a first opening and a second opening that can be aligned and staggered; wherein the adjusting plate and the top cover plate are magnetically engaged.
[0010] Preferably, a drive motor is fixedly mounted on the top of the detection cylinder, and the output shaft of the drive motor is fixedly engaged with the main shaft, wherein the top of the main shaft rotates through to the top cover plate.
[0011] Compared with the prior art, the present invention has the following advantages: (1) The present invention uses the combination of conical guide fluid and spiral guide plate to make the gas drawn in form a rotating airflow in the detection cylinder. The dust particles are thrown to the inner wall of the detection cylinder and discharged under the action of centrifugal force, while the gas is concentrated at the axis and enters the sensor detection area. This structure can significantly reduce the interference of dust on the sensor, ensure more accurate detection of toxic and combustible gases, and avoid the decrease in sensor sensitivity or detection error caused by dust covering; (2) The present invention is equipped with an electromagnetic coil and filter drive disk linkage structure, which can realize the timed rotation of the filter and dust removal. When the electromagnetic coil is de-energized, the filter rotates under the meshing of gears and works with the dust hood and dust discharge pipe to blow away the dust accumulated on the lower surface of the filter. This avoids the problem of frequent maintenance caused by filter blockage in traditional gas detection devices and significantly extends the service life of the filter and sensor; (3) The present invention has a first opening and a second opening that can be aligned or staggered between the top cover plate and the adjustment plate, which can flexibly control the airflow speed and pressure, thereby adjusting the cleaning airflow intensity in the dust hood. This allows the device to be flexibly adjusted for different dust concentrations in different environments, ensuring both the cleaning efficiency of the filter screen and avoiding excessive disturbance to the gas detection channel, thus expanding its applicability; (4) This invention not only achieves gas-solid separation within the detection cylinder, but also performs secondary filtration of the gas before it enters the sensor through a combination structure of a disc-shaped support, a filter screen buckle, and a filter screen. This dual-layer purification mechanism makes the gas that finally enters the sensor purer, thereby avoiding interference factors such as impurities and dust, ensuring that the sensor can perform real-time monitoring of various toxic and combustible gases with high sensitivity and low noise; (5) This invention achieves periodic cleaning of the filter screen through the timed switching of the electromagnetic coil, and combined with the flow guiding, filtering, and dust removal system, it enables the entire detection device to have a self-maintenance function. Compared with the traditional method of relying on manual disassembly and cleaning of the filter screen, it significantly reduces the number of downtime maintenance and costs, while avoiding secondary pollution or sensor damage that may occur during manual cleaning, thus improving the overall stability and reliability of operation. Attached Figure Description
[0012] Figure 1 This is a schematic diagram of the overall structure of the present invention.
[0013] Figure 2 This is a schematic diagram of the internal structure of the detection cylinder of the present invention.
[0014] Figure 3 For the present invention Figure 2 Schematic diagram of the structure at point A in the middle.
[0015] Figure 4 This is a schematic diagram of the spiral guide plate structure of the present invention.
[0016] Figure 5 This is a schematic diagram of the driving cone structure of the present invention.
[0017] Figure 6 This is a schematic diagram of the structure of the filter drive disk of the present invention.
[0018] Figure 7 For the present invention Figure 6 Schematic diagram of the structure at point B.
[0019] Figure 8 For the present invention Figure 6 Schematic diagram of the structure at point C.
[0020] Figure 9 This is a schematic diagram of the installation location of the present invention.
[0021] In the diagram: 101-Detection cylinder; 102-Indicator head; 103-Connecting exhaust pipe; 104-Air inlet; 105-Air inlet fan blade; 106-Guide fan blade; 107-Dust exhaust pipe; 108-Main shaft; 109-Spiral guide plate; 110-Conical guide plate; 111-Separated air outlet; 112-Isolation support ring; 113-Drive motor; 114-Top cover plate; 115-Adjusting plate; 116-First opening; 117-The... Two openings; 118-Toxic and combustible gas sensor; 119-Filter screen; 120-Filter screen cover; 121-Drive disc; 122-Dust hood; 123-Drive cone; 124-Separated air intake channel; 125-Air intake blade; 126-Disc support; 127-Filter screen drive disc; 128-Third opening; 129-Fourth opening; 130-Gear ring; 131-Distribution gear; 132-Center gear; 133-Tube shaft. Detailed Implementation
[0022] The following is in conjunction with the appendix Figures 1-9 The technical solution of the present invention will be further illustrated through specific embodiments.
[0023] This invention provides a toxic and combustible gas detection device, including a meter 102. The meter 102 is fixedly mounted with a detection cylinder 101 via a connecting exhaust pipe 103. The bottom and top of the detection cylinder 101 are respectively provided with an air inlet 104 and a separate air outlet 111. A guide fan blade 106 is rotatably mounted on the inner wall of the detection cylinder 101 at the air inlet 104, and an air inlet fan blade 105 is fixedly mounted on the guide fan blade 106. A conical guide 110 is coaxially suspended and fixed in the middle of the inner wall of the detection cylinder 101, and a gap is left between the circumferential edge of the conical guide 110 and the inner wall of the detection cylinder 101. An isolation support ring 112 is fixedly installed on the top of the inner wall of the detection cylinder 101. The isolation support ring 112 is located above the separation outlet 111. A drive cone 123 is fixedly installed on the isolation support ring 112. A separation air intake channel 124 is opened at the axial position of the drive cone 123. An air intake blade 125 is rotatably installed in the separation air intake channel 124. Multiple spiral guide plates 109 are fixedly installed in a circular array on the lower surface of the cone guide 110. A main shaft 108 is rotatably installed at the axial position of the cone guide 110. The bottom end of the main shaft 108 is fixedly engaged with the guide fan blade 106. A disc-shaped support body 126 is fixedly mounted on the drive cone 123. The disc-shaped support body 126 has a circular array of fourth openings 129. A filter screen mounting plate 120 is also rotatably mounted on the disc-shaped support body 126. The filter screen mounting plate 120 has a circular array of third openings 128 with the same number and shape as the fourth openings 129. A filter screen 119 is rotatably fitted between the filter screen mounting plate 120 and the opposite surface of the disc-shaped support body 126. A filter screen drive disc 127 is rotatably mounted at the center of the upper surface of the disc-shaped support body 126. The filter screen drive disc 127 is fixedly fitted with the filter screen 119. A central gear 132 is rotatably fitted at the center of the filter screen drive disc 127. A gear ring 130 is concentrically fitted on the outer side of the central gear 132. The gear ring 130 and the central gear 132 are driven by multiple distribution gears 131 meshing together. All distribution gears 131 are rotatably mounted on the filter screen drive disc 127. The central gear 132 and the intake blade 125 are synchronously driven by a tube shaft 133. Both the tube shaft 133 and the intake blade 125 are rotatably mounted on the main shaft 108. The tube shaft 133 is rotatably engaged with the disc-shaped support 126 and the filter drive disk 127. A drive disk 121 is coaxially fixed on the gear ring 130 and is fixedly mounted on the main shaft 108. A dust hood 122 is fixedly embedded in the drive cone 123. A dust exhaust pipe 107 is fixedly connected to the dust exhaust pipe 107. The bottom end of the dust exhaust pipe 107 passes through the cone-shaped guide 110 and extends below the cone-shaped guide 110. The bottom end of the dust exhaust pipe 107 also passes through the circumferential surface of the detection cylinder 101 and extends to the outside of the detection cylinder 101. The top end of the dust hood 122 is fixedly connected to one of the fourth openings 129.A top cover plate 114 is coaxially mounted above the isolation support ring 112. The top cover plate 114 is fixed to the top of the detection cylinder 101. A gap is left between the top cover plate 114 and the filter screen plate 120, and multiple toxic and combustible gas sensors 118 are fixedly installed in this gap. An adjusting plate 115 is rotatably mounted coaxially on the top cover plate 114. The adjusting plate 115 and the top cover plate 114 are respectively provided with a first opening 116 and a second opening 117 that can be aligned and staggered; the adjusting plate 115 and the top cover plate 114 are magnetically engaged. A drive motor 113 is fixedly mounted on the top of the detection cylinder 101. The output shaft of the drive motor 113 is fixedly engaged with the main shaft 108, and the top of the main shaft 108 rotates through to the top of the top cover plate 114.
[0024] The working principle of the toxic and combustible gas detection device disclosed in this invention is as follows: In use, the device is installed in... Figure 9At the indicated positions, the drive motor 113 is activated. The output shaft of the drive motor 113 drives the main shaft 108 to rotate. The main shaft 108 drives the guide fan blades 106 and the intake fan blades 105 to rotate. The intake fan blades 105 draw in the gas outside the detection cylinder 101 through the air inlet 104, and then the guide fan blades 106 blow the drawn-in gas toward the lower surface of the conical guide tube 110. Under the guidance of the spiral guide plate 109, the gas rotates and enters the gas through the gap between the detection cylinder 101 and the conical guide tube 110. The space between the driving cone 123 and the cone-shaped guide 110 allows solid particles (such as dust) in the gas to rotate along the inner wall of the detection cylinder 101 under centrifugal force during rotation. The pure gas then gathers at the axis of the detection cylinder 101, while the solid particles follow the gas along the inner wall to the separation outlet 111, finally exiting the detection cylinder 101 through the separation outlet 111. Simultaneously, the rotation of the main shaft 108 also drives the rotation of the main shaft 108 and the gear ring 130. 130 drives the central gear 132 to rotate via the distribution gear 131 (an electromagnetic coil is embedded inside the disc-shaped support 126; when the electromagnetic coil is energized, it generates magnetic force to attract and constrain the rotation of the filter drive disc 127; therefore, the electromagnetic coil is energized at this time to limit the rotation of the filter drive disc 127). The central gear 132 drives the intake blade 125 inside the separation intake channel 124 to rotate via the tube shaft 133. The intake blade 125 draws the gas between the drive cone 123 and the cone guide 110 into the separation intake channel 124. In section 24, the gas is then discharged into the space between the disc-shaped support 126 and the driving cone 123. At this time, this part of the gas will pass through the filter screen 119 (through the fourth opening 129 and the third opening 128), and then the gas will enter the position that contacts the toxic and combustible gas sensor 118. The content of various toxic gases in the gas is monitored by multiple toxic and combustible gas sensors 118. Finally, the gas flows through the second opening 117 and the first opening 116 to the outside of the detection cylinder 101, and is finally discharged through the exhaust pipe 103.If the electromagnetic coil inside the disc-shaped support 126 is not energized, the rotation of the filter drive disc 127 will not be restricted (except by friction). The filter drive disc 127 will rotate due to the revolution of the distribution gear 131. This rotation will cause the filter 119 to rotate between the filter clip 120 and the disc-shaped support 126. This will result in different positions of the filter 119 moving to the dust cover 122. By default, the first opening 116 and the second opening 117 are offset by a certain angle (not completely offset, adjustable). The airflow from the first opening 116 and the second opening 117 is restricted, which increases the air pressure between the top cover 114 and the filter 119. At this point, air enters the dust hood 122 through the filter 119 (partially) above it, removing the dust filtered from the lower surface of the filter 119 (air moves from the lower surface to the upper surface of the filter 119, so dust accumulates on the lower surface; from the dust hood 122, the air flows in the opposite direction, blowing away the dust from the lower surface of the filter 119). Finally, the air is discharged through the dust exhaust pipe 107 to the outside of the detection cylinder 101. The airflow rate inside the dust hood 122 can be adjusted by changing the degree of misalignment between the first opening 116 and the second opening 117. Meanwhile, the electromagnetic coil inside the disc-shaped support 126 needs to be started and stopped periodically to clean and shut down the filter 119 periodically, thereby ensuring that all toxic and combustible gas sensors 118 are not blocked by dust and improving the reliability and sensitivity of toxic gas monitoring.
Claims
1. A toxic and combustible gas detection device, comprising a meter (102), wherein a detection cylinder (101) is fixedly installed on the meter (102) via a connecting exhaust pipe (103), characterized in that: The bottom and top of the detection cylinder (101) are respectively provided with an air inlet (104) and a separation air outlet (111). A guide fan (106) is rotatably mounted on the inner wall of the detection cylinder (101) at the air inlet (104), and an air inlet fan (105) is fixedly mounted on the guide fan (106). A conical guide (110) is coaxially suspended and fixed in the middle of the inner wall of the detection cylinder (101), with a gap between the circumferential edge of the conical guide (110) and the inner wall of the detection cylinder (101). An isolation support ring (112) is fixedly mounted on the top of the inner wall of the detection cylinder (101). The isolation support ring (112) is located above the separation outlet (111). A drive cone (123) is fixedly installed on the isolation support ring (112). A separation intake channel (124) is opened at the axial position of the drive cone (123). An intake blade (125) is rotatably installed in the separation intake channel (124). Multiple spiral guide plates (109) are fixedly installed in a circular array on the lower surface of the cone guide (110). A main shaft (108) is rotatably installed at the axial position of the cone guide (110). The bottom end of the main shaft (108) is fixedly engaged with the guide fan blade (106). A disc-shaped support body (126) is fixedly installed on the drive cone (123). A filter screen buckle plate (120) is also rotatably installed on the disc-shaped support body (126). A filter screen (119) is rotatably fitted between the filter screen buckle plate (120) and the opposite surface of the disc-shaped support body (126). A filter screen drive disk (127) is also rotatably installed at the center of the upper surface of the disc-shaped support body (126). The filter screen drive disk (127) is fixedly fitted with the filter screen (119). A central gear (132) is rotatably fitted at the center of the filter screen drive disk (127). A gear ring (130) is concentrically fitted on the outer side of the central gear (132). The gear ring (130) and the central gear (132) are driven by multiple distribution gears (131). All distribution gears (131) are rotatably installed on the filter screen drive disk (127).
2. The toxic and combustible gas detection device according to claim 1, characterized in that: The disc-shaped support (126) has a circular array of multiple fourth openings (129), and the filter screen buckle (120) has a circular array of third openings (128) with the same number and shape as the fourth openings (129).
3. The toxic and combustible gas detection device according to claim 2, characterized in that: The central gear (132) and the intake blade (125) are synchronously driven by a tube shaft (133). The tube shaft (133) and the intake blade (125) are rotatably sleeved on the main shaft (108). The tube shaft (133) is rotatably engaged with the disc support (126) and the filter drive disk (127). The drive disk (121) is coaxially fixed on the gear ring (130) and is fixedly sleeved on the main shaft (108).
4. The toxic and combustible gas detection device according to claim 3, characterized in that: A dust cover (122) is fixedly embedded inside the drive cone (123). The dust cover (122) is fixedly connected to a dust discharge pipe (107). The bottom end of the dust discharge pipe (107) passes through the cone-shaped guide (110) and extends to the bottom of the cone-shaped guide (110). The bottom end of the dust discharge pipe (107) also passes through the circumferential surface of the detection cylinder (101) and extends to the outside of the detection cylinder (101). The top end of the dust cover (122) is fixedly connected to one of the fourth openings (129).
5. A toxic and combustible gas detection device according to claim 4, characterized in that: A top cover plate (114) is coaxially mounted above the isolation support ring (112). The top cover plate (114) is fixed to the top of the detection cylinder (101). There is a gap between the top cover plate (114) and the filter screen buckle plate (120), and multiple toxic and combustible gas sensors (118) are fixedly installed in the gap.
6. The toxic and combustible gas detection device according to claim 5, characterized in that: An adjusting plate (115) is coaxially rotatably mounted on the top cover plate (114). The adjusting plate (115) and the top cover plate (114) are respectively provided with a first opening (116) and a second opening (117) that can be aligned and staggered; wherein the adjusting plate (115) and the top cover plate (114) are magnetically attracted to each other.
7. A toxic and combustible gas detection device according to claim 6, characterized in that: A drive motor (113) is fixedly mounted on the top of the detection cylinder (101). The output shaft of the drive motor (113) is fixedly engaged with the main shaft (108). The top of the main shaft (108) rotates through to the top cover plate (114).