Combustible gas detector capable of being assembled in ceiling mode
By setting multiple through holes and adjustment components on the cover of the combustible gas detector to regulate the gas flow channel, the problem of poor detection of low-density gases in the prior art is solved, and accurate detection of gases of different densities is achieved, making it suitable for high-ceiling environments.
Patent Information
- Application Number
- CN202520013548.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-03
- Publication Date
- 2026-01-02
- Estimated Expiration
- 2035-01-03
AI Technical Summary
Existing combustible gas detectors are not effective at detecting low-density gases in environments such as factories, and the detection range cannot be precisely adjusted.
A ceiling-mountable combustible gas detector was designed. By setting multiple through holes I and II on the cover and using adjusting components and baffles to adjust the gas flow channel, the detector can accurately detect gases of different densities.
It enables accurate detection of gases of different densities, is suitable for high-ceiling environments such as factories, and improves detection accuracy and applicability.
Smart Images
Figure CN223756714U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to gas detection equipment technical field especially, it relates to a combustible gas detector of ceiling suction assembly. BACKGROUND
[0002] Combustible gas detector, also known as gas leakage detection alarm, is an important preventive alarm device in regional safety monitoring system. With the continuous progress of technology and the improvement of safety awareness, combustible gas detector is increasingly popular in industry, medical treatment, environmental protection, public safety and family life, and market demand is expanding. In industrial environment, when combustible or toxic gas leaks, and the detector detects that the gas concentration reaches the threshold of explosion limit, the device will trigger an alarm signal to alert workers to take appropriate safety measures to ensure the safety of production process.
[0003] At present, the combustible gas detector on the market mostly adopts ceiling suction type installation method and is fixed on the ceiling or top wall surface of the building. Air enters the inside through the air inlet reserved on the detector shell and contacts the built-in sensor, and the sensor analyzes the gas composition and its concentration in the air immediately. Once the combustible gas concentration exceeds the preset threshold, the detector will issue an alarm.
[0004] However, it is worth noting that the air inlet of the existing combustible gas detector is generally located below the detector shell, and the original design intention is to use the air pressure to make the leaked gas enter the inside of the detector smoothly. However, in actual application, especially in the environment of enterprise workshop, the performance of such detector is not satisfactory.
[0005] In actual application, due to the difference in molecular weight of different gases (the gas with higher molecular weight has higher density), the lift generated when they are impacted is also different. In order to facilitate production operation, the ceiling of the workshop is usually designed to be high, which may lead to poor effect of ceiling suction type combustible gas detector in detecting low density gas. Experiments show that for most gases with density less than 1, the lift under standard conveying pressure can be up to three meters, and the height of the ceiling of the workshop is usually more than three meters.
[0006] Based on this, we think it is necessary to develop a ceiling suction type combustible gas detector with adjustable detection range to meet the actual needs of accurate detection of specific gas. CONTENT OF THE UTILITY MODEL
[0007] In view of the deficiencies in the prior art, the utility model provides a combustible gas detector which can be assembled by ceiling suction. The detector can accurately adjust its detection gas range according to actual needs, so as to overcome the limitation that the prior art device only has high detection accuracy for high density gas when the height of the workshop exceeds the expectation.
[0008] To achieve the above object, the utility model adopts the following technical scheme:
[0009] A combustible gas detector can suck the top assembly, including the top, the detector is arranged in the top inside, the top lower side is screwed with the cover, a plurality of through holes I are opened in the cover side end, a plurality of through holes II are opened in the cover lower end, a plurality of through holes I and a plurality of through holes II are arranged equidistantly around the center axis of the cover, the adjusting part is rotatably connected in the cover, the upper end of the adjusting part is open structure, and the adjusting part is respectively provided with through hole III through the through hole I, the through hole II, the outer side end of the adjusting part is abutted with the inner side end of the cover, a plurality of baffles are arranged between the lower end of the adjusting part and the inner wall of the cover, a plurality of baffles are arranged equidistantly around the center axis of the cover, and each baffle is slidably connected with the cover.
[0010] Preferably, a plurality of driving grooves are opened through the adjusting part, a plurality of driving grooves are arranged equidistantly around the center axis of the cover, the distance between the two ends of each driving groove and the center axis of the cover is not equal, and the inner wall of each driving groove is smoothly transitioned, a plurality of positioning grooves are opened through the cover for the driving groove, the center line of each positioning groove is coincided with the radius line of the cover, and a upper and lower axial driven rod is inserted into each positioning groove and corresponding driving groove.
[0011] Preferably, when the projection of the baffle in the horizontal plane completely covers the projection of the corresponding through hole II in the horizontal plane, the projection of the side end through hole III of the adjusting part in the vertical plane is completely coincided with the projection of the through hole I in the vertical plane, and when the projection of the baffle in the horizontal plane is not completely coincided with the projection of the corresponding through hole II in the horizontal plane, the projection of the side end through hole III of the adjusting part in the vertical plane is not completely coincided with the projection of the through hole I in the vertical plane.
[0012] Preferably, a driving hole is coaxially opened through the middle of the adjusting part, the projection of the driving hole in the vertical plane is polygonal structure, and a upper and lower axial driving rod is inserted into the driving hole, and the driving rod is rotatably connected with the cover.
[0013] Preferably, the driving rod and the driven rod are both bolt structure, and the screw tail part of the driving rod and the driven rod is screwed with a locking nut.
[0014] Preferably, the outer side of the screw head part of the driving rod and the driven rod is all sleeved with an elastic washer, and the number of the elastic washer on the outer side of each driven rod and driving rod is not one.
[0015] Compared with the prior art, the utility model has the beneficial effects that:
[0016] The utility model discloses a device for detecting gas leakage, which is characterized by the following technical scheme: a top cover is arranged on the top of the device; a probe is arranged on the top cover; a through hole I is arranged on the side end of the cover; a through hole II is arranged on the lower end of the cover; an adjusting part and a baffle are arranged inside the cover; the adjusting part and the baffle shield the through hole I and the through hole II; the device can adjust the gas flow channel in practical application. BRIEF DESCRIPTION OF DRAWINGS
[0017] Figure 1 It is the overall structure schematic diagram of the utility model.
[0018] Figure 2 It is the internal structure schematic diagram of the utility model cover.
[0019] Figure 3 It is the schematic diagram of the cooperation relation of the driven rod and the adjusting part of the utility model.
[0020] Figure 4 It is the schematic diagram of the position relation of the baffle and the through hole II of the utility model.
[0021] Figure 5 It is the schematic diagram of the cooperation relation of the driven rod and the cover of the utility model.
[0022] In the drawing: 1, top cover; 2, probe; 3, through hole I; 4, adjusting part; 5, through hole III; 6, cover; 7, driving groove; 8, driven rod; 9, locking nut; 10, driving rod; 11, elastic gasket; 12, through hole II; 13, baffle; 14, positioning groove. DETAILED DESCRIPTION
[0023] The technical scheme in the embodiments of the utility model will be described in detail below with reference to the drawings, which clearly and comprehensively shows its details. It should be noted that the listed embodiments are only examples and do not represent the entire implementation range of the utility model. Based on the embodiments, other implementation manners derived by those skilled in the art without creative labor are considered to fall within the protection scope of the utility model.
[0024] In the description of the utility model, it is understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the utility model.
[0025] Please refer to Figure 1 A combustible gas detector can be installed on the ceiling, which is designed to be similar to the existing technical devices on the market, and the core component is a top cover 1, and the detector 2 is ingeniously built in the top cover 1. As shown in the figure, in order to facilitate the installation of the device, a plurality of bolt holes are arranged on the top cover 1, so that the detector 2 can be connected to the fixing structure such as the cross beam of the roof of the factory building through bolts, and the stable installation of the device is ensured.
[0026] In order to fully protect the detector 2 from various environmental influences, the lower side of the top cover 1 is tightly combined with the cover 6 through a precision thread, and the potential threat of external factors to the detector 2 is effectively isolated.
[0027] As shown in Figure 1 , Figure 5 The main difference between the device and the prior art is that a plurality of through holes I 3 are designed on the side end of the cover 6, and a plurality of through holes II 12 are also designed on the lower end of the cover 6. The through holes I 3 and the through holes II 12 are uniformly distributed around the central axis of the cover 6.
[0028] It should be particularly pointed out that in actual application, the position characteristics of the through holes I 3 and the through holes II 12 determine their applicability in the factory building to detect combustible and explosive gases or toxic and harmful gases in a specific range. Specifically, in actual application, since the through holes I 3 are arranged on the side end of the cover 6, they are more suitable for detecting gases with smaller density. Such gases, during the leakage process, due to their lighter weight, the upward lift will not be too high, but they will float above the air, that is, they will be enriched near the roof of the factory building, at this time, they are more likely to enter the inside of the cover 6 through the through holes I 3. Correspondingly, since the through holes II 12 are arranged on the lower side of the cover 6, they are more suitable for detecting gases with larger density. When such gases leak, due to their large weight, the lift is often three to four meters, and they can directly impact into the cover 6 above through the through holes II 12.
[0029] Specifically, please refer to Figure 1 , Figure 2 In order to close the through holes I 3, the adjusting piece 4 is rotatably connected in the cover 6, the adjusting piece 4 is matched with the structure of the cover 6, and the upper end is open.
[0030] Therefore, the outer end of the adjusting piece 4 is tightly attached to the inner end of the cover 6, and the through hole I 3 is closed.
[0031] In addition, a through hole III 5 is arranged on the adjusting piece 4 corresponding to the through hole I 3, and the corresponding relationship between the two can be changed by rotating the adjusting piece 4, so as to adjust the gas flow width of the through hole I 3 according to actual needs, control the amount of gas entering the cover 6 per unit time, and realize the adjustment of the detection accuracy.
[0032] In detail, referring to Figure 3 and Figure 4 , in order to prevent the adjusting piece 4 from hindering the gas from entering the inside of the cover 6, the device is specially provided with a through hole III 5 below the adjusting piece 4, and the through hole III 5 is in communication with the through hole II 12.
[0033] At the same time, in order to realize effective closure of the through hole II 12 and the through hole III 5 below the adjusting piece 4, a plurality of baffles 13 are arranged between the lower end surface of the adjusting piece 4 and the inner wall of the cover 6, and the baffles 13 are uniformly distributed around the central axis of the cover 6. The arrangement can realize effective control of the closure state of the through hole II 12 and the through hole III 5 below the adjusting piece 4. At this time, the cooperation between the adjusting piece 4 and the cover 6 can ensure the stability of the position of the baffle 13.
[0034] In addition, the baffle 13 is connected with the cover 6 and the through hole II 12 by sliding, and the relative position of the baffle 13 and the through hole II 12 can be adjusted by moving the baffle 13, and then the gas flow channel width of the through hole II 12 can be adjusted according to actual needs, so as to control the flow of gas entering the inside of the cover 6 through the through hole II 12 per unit time, and realize accurate adjustment of the detection gas precision.
[0035] It is worth noting that, as shown in Figure 4 , the upper and lower sides of each cover 6 are fixedly connected with elastic pads, and the elastic pads cooperate with the adjusting piece 4 to jointly limit the position of the baffle 13, so as to ensure that the limiting pad can fully realize effective shielding of the through hole II 12 in actual application.
[0036] Specifically, as shown in Figure 2 , Figure 3 , Figure 5 , in order to realize the sliding connection between the baffle 13 and the cover 6, and ensure that the plurality of baffles 13 can move synchronously, a plurality of driving grooves 7 are arranged on the adjusting piece 4, and these driving grooves 7 are arranged equidistantly around the central axis of the cover 6.
[0037] At the same time, a upper and lower axial driven rod 8 is inserted into each of the driving grooves 7, and the driven rod 8 is fixedly connected with the baffle 13.
[0038] At this time, by constraining the distance between the two ends of each drive slot 7 and the central axis of the cover 6 to be unequal, and by designing the inner wall of each drive slot 7 with a smooth transition, the drive slot 7 can cooperate with the positioning slot 14 opened through the lower side of the cover 6. By further constraining the center line of each positioning slot 14 to coincide with the radius line of the cover 6, when the adjusting member 4 rotates, the distance between the center axis of the driven rod 8 and the center axis of the cover 6 can be changed by the cooperation between the drive slot 7 and the positioning slot 14, so as to adjust the coverage area between the baffle 13 and the through hole II 12.
[0039] It must be pointed out that in actual application, the device adjusts the position of the baffle 13 by rotating the adjusting member 4, thereby changing the gas flow path of the through hole II 12. During the rotation of the adjusting member 4, the corresponding relationship between the through hole I 3 and the side end through hole III 5 of the adjusting member 4 also changes. Therefore, the device constrains that when the horizontal projection of the baffle 13 completely covers the horizontal projection of the through hole II 12, the vertical projection of the side end through hole III 5 of the adjusting member 4 completely overlaps the vertical projection of the through hole I 3. Conversely, if the horizontal projection of the baffle 13 does not completely overlap the horizontal projection of the through hole II 12, the vertical projection of the side end through hole III 5 of the adjusting member 4 also does not completely overlap the vertical projection of the through hole I 3. This mechanism ensures that in actual operation, when the gas flow path of the through hole I 3 is expanded, the gas flow path of the through hole II 12 is correspondingly reduced; and vice versa. This design enables the device to effectively detect specific harmful gases.
[0040] Specifically, referring to Figure 2 and Figure 3 , in order to realize the rotation control of the adjusting member 4, a drive hole is coaxially opened in the middle of the adjusting member 4, and the projection of the hole in the vertical direction is a polygonal structure. Therefore, an up-down axial drive rod 10 can be inserted into the drive hole and rotationally connected with the cover 6, so as to drive the adjusting member 4 to rotate and adjust the working state of the detector 2.
[0041] Specifically, referring to Figure 3 , Figure 4 , in order to realize the position fixation of the adjusting member 4 and the positioning rod, the drive rod 10 and the driven rod 8 adopt a bolt structure, and the screw tail parts of them are screwed with lock nuts 9 to ensure the firmness of the connection. This design not only ensures the stability of the structure, but also facilitates maintenance and replacement.
[0042] In addition, the outer sides of the screw heads of the drive rod 10 and the driven rod 8 are sleeved with elastic washers 11, which can effectively absorb vibration and impact. While ensuring the position fixation of the adjusting member 4 and the positioning rod, they can also prevent the friction resistance between the positioning rod and the adjusting member 4 and the lock nuts 9 and the cover 6 from being too large, which affects the normal operation of the device.
[0043] Further, the device restricts the number of elastic pads 11 outside each driven rod 8 and the driving rod 10 to be more than one, which can fully exert the height limiting effect of the elastic pads 11.
[0044] In the practical application process of the utility model,
[0045] By rotating the driving rod 10, the rotation angle of the adjusting piece 4 can be changed, thereby realizing the adjustment of the gas flow passage width of the through hole I 3 and the through hole II 12. Specifically, in actual operation, if the device enlarges the gas flow passage width of the through hole II 12, the gas flow passage width of the through hole I 3 will be correspondingly reduced, and vice versa, if the width of the through hole II 12 is reduced, the through hole I 3 will be correspondingly increased.
[0046] Although the embodiments of the utility model have been shown and described, it can be understood by those skilled in the art that various changes, modifications, replacements and modifications can be made to these embodiments without departing from the principles and spirits of the utility model, and the scope of the utility model is defined by the appended claims and their equivalents.
Claims
1. A ceiling-mountable combustible gas detector, comprising a top cover (1), a detector (2) disposed inside the top cover (1), and a sealing cap (6) screwed to the lower side of the top cover (1), characterized in that, The cover (6) has multiple through holes I (3) through the side end and multiple through holes II (12) through the bottom end. The multiple through holes I (3) and multiple through holes II (12) are arranged equidistantly around the central axis of the cover (6). An adjusting member (4) is rotatably connected inside the cover (6). The upper end of the adjusting member (4) has an open structure. Furthermore, the adjusting member (4) has a through hole (5) that penetrates through the through hole I (3) and through hole II (12) respectively. The outer end of the adjusting member (4) abuts against the inner end of the cover (6). Multiple baffles (13) are provided between the lower end of the adjusting member (4) and the inner wall of the cover (6). The multiple baffles (13) are arranged equidistantly around the central axis of the cover (6), and each baffle (13) is slidably connected to the cover (6).
2. A ceiling-mountable combustible gas detector according to claim 1, characterized in that: The adjusting member (4) has multiple driving grooves (7) through it. The multiple driving grooves (7) are arranged equidistantly around the central axis of the cover (6). Furthermore, the distance between the two ends of each driving groove (7) and the central axis of the cover (6) is not equal, and the inner wall of each driving groove (7) is smoothly transitioned. The cover (6) has multiple positioning slots (14) through the drive slot (7). The center line of each positioning slot (14) coincides with the radius line of the cover (6). Furthermore, each positioning slot (14) and the corresponding drive slot (7) are connected to a driven rod (8) with an up-down axial direction. The driven rod (8) is fixedly connected to the baffle (13).
3. A ceiling-mountable combustible gas detector according to claim 2, characterized in that: When the projection of the baffle (13) on the horizontal plane completely covers the projection of the corresponding through hole II (12) on the horizontal plane, the projection of the through hole III (5) on the side of the adjusting member (4) on the vertical plane completely coincides with the projection of the through hole I (3) on the vertical plane. When the projection of the baffle (13) on the horizontal plane does not coincide with the projection of the corresponding through hole II (12) on the horizontal plane, the projection of the through hole III (5) on the side of the adjusting member (4) on the vertical plane does not coincide with the projection of the through hole I (3) on the vertical plane.
4. A ceiling-mountable combustible gas detector according to claim 1, characterized in that: The adjusting member (4) has a driving hole coaxially through the middle. The projection of the driving hole on the vertical plane is a polygonal structure. A driving rod (10) with an up-down axial direction is inserted into the driving hole. The driving rod (10) is rotatably connected to the cover (6).
5. A ceiling-mountable combustible gas detector according to claim 4, characterized in that: Both the drive rod (10) and the driven rod (8) are bolted structures, and the bolt ends of the drive rod (10) and the driven rod (8) are screwed with locking nuts (9).
6. A ceiling-mountable combustible gas detector according to claim 5, characterized in that: Elastic washers (11) are fitted on the outer side of the screw head portion of the drive rod (10) and the driven rod (8), and the number of elastic washers (11) on the outer side of each driven rod (8) and drive rod (10) is not the same.