Explosion-proof combustible gas detector

Abstract

The utility model belongs to the technical field of gas detectors, and particularly relates to an explosion-proof combustible gas detector which comprises a detector body, a connecting pipe is installed at the gas inlet end of the detector body, a filter screen is fixedly arranged on the inner wall of the connecting pipe, a driving assembly is installed on the outer wall of the connecting pipe, and a gear ring is rotationally connected to the inner wall of the connecting pipe. A connecting assembly is installed on the inner wall of the gear ring, a cleaning brush is installed on the outer wall of the connecting assembly, and the cleaning brush makes friction contact with the outer side wall of the filter screen. The conical groove is formed in the gear ring, the outer side of the fixing plate is arranged to be arc-shaped, the resistance of external gas flowing into the detector body can be reduced, meanwhile, the driving assembly is installed outside the connecting pipe, and therefore the situation that due to the fact that many structures are installed in the connecting pipe, the sampling flow of the detector is reduced, and the detection accuracy is improved can be avoided. Therefore, the detection precision and the response speed of the gas concentration are influenced.

Description

Technical Field

[0001] The utility model relates to the technical field of gas detectors, and more specifically to an explosion-proof combustible gas detector. Background Art

[0002] A combustible gas detector is an instrument that detects combustible gas, usually consisting of a sensor and an alarm. The combustible gas detector detects the concentration of combustible gas in the air through the sensor. When the concentration reaches the preset alarm value, the alarm will send out an audible and visual alarm signal to remind people to take safety measures. Combustible gas detectors usually use catalytic combustion or infrared absorption principles for detection.

[0003] In the existing technology, such as the document with publication number CN220154431U, a specific explosion-proof combustible gas detector is disclosed. In this document, the device installs a motor in the second air inlet pipe and installs fan blades at the output end of the motor. The external gas can be blown into the detector body through the fan blades, so that the indoor combustible gas can be detected in time. However, since the motor and fan blade structure are installed in the second air inlet pipe, the sampling flow of the detector will be reduced, thereby affecting its detection accuracy and response speed of the gas concentration. For this reason, we propose an explosion-proof combustible gas detector. Utility Model Content

[0004] Based on the above-mentioned technical problem that "the motor and fan blade structure in the existing technical device are installed in the second air inlet pipe, which will cause the sampling flow of the detector to be reduced, thereby affecting its detection accuracy and response speed for gas concentration", the utility model proposes an explosion-proof combustible gas detector.

[0005] The utility model proposes an explosion-proof combustible gas detector, including a detector body, a connecting pipe is installed at the air inlet end of the detector body, a filter is fixedly arranged on the inner wall of the connecting pipe, a driving component is installed on the outer wall of the connecting pipe, a gear ring is rotatably connected to the inner wall of the connecting pipe, a connecting component is installed on the inner wall of the gear ring, a cleaning brush is installed on the outer wall of the connecting component, and the cleaning brush is in frictional contact with the outer wall of the filter.

[0006] Preferably, the driving assembly includes a motor and a connecting shaft, the motor output end and the outer end of the connecting shaft are both fixedly provided with synchronous wheels, the two synchronous wheels are connected by a synchronous belt transmission, and a gear is fixedly provided on the circumferential outer wall of the connecting shaft, and the gear is meshed with the outer wall of the gear ring.

[0007] Preferably, a connecting hole is opened on the outer wall of the connecting pipe, the gear is located inside the connecting hole, and the bottom of the motor is connected and fixed to the outer wall of the connecting pipe.

[0008] Preferably, both ends of the connecting shaft are rotatably connected to the inner wall of the connecting hole respectively, and the outer end of the connecting shaft passes through the connecting tube and extends to the outside thereof.

[0009] Preferably, a tapered groove is formed at an outer end of the gear ring, and the diameter of the tapered groove decreases from the outside to the inside.

[0010] Preferably, the connecting component includes a fixing plate, the outer side of the fixing plate is an arc-shaped wall, the inner side of the fixing plate is provided with a slot, the top and bottom of the inner wall of the slot are respectively convex to form a first inclined surface, the distance between the two first inclined surfaces decreases from the inside to the outside, and an arc surface is provided on the edge of the side where the two first inclined surfaces are relatively close.

[0011] Preferably, the connecting assembly further comprises a clamping block, both ends of the clamping block are provided with a second inclined surface, and the clamping block is elastically clamped with the inner wall of the clamping slot.

[0012] Preferably, a rubber sleeve is fixedly provided on the inner wall of the connecting tube, and the inner wall of the rubber sleeve is clamped with the air inlet end of the detector body.

[0013] The beneficial effects of the present invention are:

[0014] 1. By setting a conical groove on the gear ring and setting the outer side of the fixing plate into an arc shape, the resistance of the external gas to flow into the detector body can be reduced. At the same time, the driving assembly is installed on the outside of the connecting pipe, thereby avoiding the reduction of the sampling flow of the detector due to the installation of more structures inside the connecting pipe, thereby affecting its detection accuracy and response speed of the gas concentration.

[0015] 2. By inserting the thicker end of the connecting tube into the air inlet end of the detector body, the rubber sleeve on the inner wall of the connecting tube can be tightly squeezed against the outer wall of the air inlet end of the detector body, so that the connecting tube can be fixed to the end of the detector body, so as to facilitate the installation and disassembly of the connecting tube.

[0016] 3. When cleaning the filter, the motor drives the connecting shaft to rotate through the synchronous wheel, drives the gear to rotate through the connecting shaft, drives the gear ring to rotate through the gear, drives the fixed plate to rotate through the gear ring, and drives the cleaning brush to rotate through the fixed plate. The cleaning brush can clean the dust on the outer wall of the filter. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0018] Figure 2 It is a schematic diagram of the internal structure of the utility model;

[0019] Figure 3 It is a schematic diagram of the partial split structure of the utility model;

[0020] Figure 4 For this utility model Figure 2 The enlarged view of point A in the middle;

[0021] Figure 5 This is a schematic diagram of the installation structure of the gear ring of the utility model.

[0022] In the figure: 1. detector body; 2. connecting pipe; 3. rubber sleeve; 4. filter screen; 5. gear ring; 6. conical groove; 7. fixing plate; 8. slot; 9. first inclined surface; 10. arc surface; 11. cleaning brush; 12. block; 13. second inclined surface; 14. connecting hole; 15. motor; 16. connecting shaft; 17. gear; 18. synchronous wheel. DETAILED DESCRIPTION

[0023] Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention. In the present invention, unless otherwise clearly specified and limited, the terms "connection and fixation" and "fixed installation" should be understood in a broad sense. For example, "fixed installation" can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, an electrical connection, or a direct connection. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0024] like Figure 1 , Figure 2 and Figure 5 As shown, an explosion-proof combustible gas detector includes a detector body 1, a connecting pipe 2 is installed at the air inlet end of the detector body 1, a filter screen 4 is fixedly provided on the inner wall of the connecting pipe 2, a driving assembly is installed on the outer wall of the connecting pipe 2, a gear ring 5 is rotatably connected to the inner wall of the connecting pipe 2, a connecting assembly is installed on the inner wall of the gear ring 5, a cleaning brush 11 is installed on the outer wall of the connecting assembly, and the cleaning brush 11 is in friction contact with the outer wall of the filter screen 4.

[0025] like Figure 2 and Figure 4As shown, the driving assembly includes a motor 15 and a connecting shaft 16. The output end of the motor 15 and the outer end of the connecting shaft 16 are fixedly provided with a synchronous wheel 18. The two synchronous wheels 18 are connected through a synchronous belt transmission. A gear 17 is fixedly provided on the circumferential outer wall of the connecting shaft 16. The gear 17 is meshed with the outer wall of the ring gear 5. A connecting hole 14 is opened on the outer wall of the connecting pipe 2. The gear 17 is located inside the connecting hole 14. The bottom of the motor 15 is connected and fixed to the outer wall of the connecting pipe 2. Both ends of the connecting shaft 16 are respectively rotatably connected to the inner wall of the connecting hole 14. The outer end of the connecting shaft 16 passes through the connecting pipe 2 and extends to its outside. When cleaning the filter 4, the motor 15 drives the connecting shaft 16 to rotate through the synchronous wheel 18, drives the gear 17 to rotate through the connecting shaft 16, drives the ring gear 5 to rotate through the gear 17, drives the fixed plate 7 to rotate, and drives the cleaning brush 11 to rotate through the fixed plate 7. The dust on the outer wall of the filter 4 can be cleaned by the cleaning brush 11.

[0026] like Figure 5 As shown, a conical groove 6 is provided at the outer end of the gear ring 5, and the diameter of the conical groove 6 decreases from the outside to the inside. The outer side of the fixing plate 7 is an arc-shaped wall. By providing the conical groove 6 on the gear ring 5 and setting the outer side of the fixing plate 7 to be arc-shaped, the resistance of the external gas to flow into the detector body 1 can be reduced. At the same time, the driving component is installed on the outside of the connecting pipe 2, thereby avoiding the reduction of the sampling flow of the detector due to the installation of more structures inside the connecting pipe 2, thereby affecting its detection accuracy and response speed of the gas concentration.

[0027] like Figure 3 As shown, the connecting component includes a fixing plate 7, a card slot 8 is provided on the inner side of the fixing plate 7, and the top and bottom of the inner wall of the card slot 8 are respectively convex to form a first inclined surface 9, the distance between the two first inclined surfaces 9 decreases from the inside to the outside, and an arc surface 10 is provided at the edge of one side where the two first inclined surfaces 9 are relatively close to each other. The connecting component also includes a card block 12, and second inclined surfaces 13 are provided at both ends of the card block 12. The card block 12 is elastically engaged with the inner wall of the card slot 8. By pressing the card block 12 on the back of the cleaning brush 11 against the inner wall of the card slot 8 on the fixing plate 7, the arc surfaces 10 at the ends of the first inclined surface 9 of the inner wall of the card slot 8 are squeezed at both ends of the card block 12. At this time, the two ends of the card block 12 are elastically bent inwardly and slide along the first inclined surface 9 into the inside of the card slot 8 until the two ends of the card block 12 are engaged with the inner wall of the card slot 8, thereby facilitating the installation of the cleaning brush 11.

[0028] like Figure 1 and Figure 2 As shown, a rubber sleeve 3 is fixedly provided on the inner wall of the connecting tube 2, and the inner wall of the rubber sleeve 3 is clamped with the air inlet end of the detector body 1. By inserting the thicker end of the connecting tube 2 into the air inlet end of the detector body 1, the rubber sleeve 3 on the inner wall of the connecting tube 2 can be tightly squeezed with the outer wall of the air inlet end of the detector body 1, so that the connecting tube 2 can be fixed to the end of the detector body 1, so as to facilitate the installation and disassembly of the connecting tube 2.

[0029] Working principle: By inserting the thicker end of the connecting tube 2 into the air inlet end of the detector body 1, the rubber sleeve 3 on the inner wall of the connecting tube 2 can be tightly pressed against the outer wall of the air inlet end of the detector body 1, so that the connecting tube 2 can be fixed to the end of the detector body 1, so as to facilitate the installation and removal of the connecting tube 2;

[0030] When the detector body 1 is working, external gas enters the detector body 1 through the connecting pipe 2, and the gas can be filtered through the filter screen 4;

[0031] When the filter 4 needs to be cleaned, the motor 15 drives the connecting shaft 16 to rotate through the synchronous wheel 18, drives the gear 17 to rotate through the connecting shaft 16, drives the gear ring 5 to rotate through the gear 17, drives the fixing plate 7 to rotate, drives the cleaning brush 11 to rotate through the fixing plate 7, and the cleaning brush 11 can clean the dust on the outer wall of the filter 4;

[0032] By pressing the clamping block 12 on the back of the cleaning brush 11 against the inner wall of the slot 8 on the fixing plate 7, the two ends of the clamping block 12 are pressed against the arc surface 10 at the end of the first inclined surface 9 of the inner wall of the slot 8. At this time, the two ends of the clamping block 12 are elastically bent inwardly and slide along the first inclined surface 9 into the slot 8 until the two ends of the clamping block 12 are engaged with the inner wall of the slot 8, so that the cleaning brush 11 can be easily installed.

[0033] By providing the conical groove 6 on the gear ring 5 and configuring the outer side of the fixing plate 7 to be arc-shaped, the resistance of the external gas flowing into the inside of the detector body 1 can be reduced.

[0034] The above are only preferred specific implementation methods of the utility model, but the protection scope of the utility model is not limited to this. Any technician familiar with the technical field within the technical scope disclosed by the utility model, who makes equivalent replacements or changes based on the technical scheme and utility model concept of the utility model, should be covered by the protection scope of the utility model.

Claims

1. An explosion-proof combustible gas detector, comprising a detector body (1), characterized in that: A connecting pipe (2) is installed at the air inlet end of the detector body (1), a filter screen (4) is fixedly arranged on the inner wall of the connecting pipe (2), a driving assembly is installed on the outer wall of the connecting pipe (2), a gear ring (5) is rotatably connected to the inner wall of the connecting pipe (2), a connecting assembly is installed on the inner wall of the gear ring (5), a cleaning brush (11) is installed on the outer wall of the connecting assembly, and the cleaning brush (11) is in frictional contact with the outer wall of the filter screen (4).

2. The explosion-proof combustible gas detector according to claim 1, characterized in that: The driving assembly comprises a motor (15) and a connecting shaft (16); a synchronous wheel (18) is fixedly provided at the output end of the motor (15) and the outer end of the connecting shaft (16); the two synchronous wheels (18) are connected by a synchronous belt transmission; a gear (17) is fixedly provided on the circumferential outer wall of the connecting shaft (16); the gear (17) is meshed with the outer wall of the gear ring (5).

3. The explosion-proof combustible gas detector according to claim 2, characterized in that: The outer wall of the connecting pipe (2) is provided with a connecting hole (14), the gear (17) is located inside the connecting hole (14), and the bottom of the motor (15) is connected and fixed to the outer wall of the connecting pipe (2).

4. The explosion-proof combustible gas detector according to claim 2, characterized in that: Both ends of the connecting shaft (16) are rotatably connected to the inner wall of the connecting hole (14) respectively, and the outer end of the connecting shaft (16) passes through the connecting pipe (2) and extends to the outside thereof.

5. The explosion-proof combustible gas detector according to claim 1, characterized in that: A conical groove (6) is formed at the outer end of the gear ring (5), and the diameter of the conical groove (6) decreases from the outside to the inside.

6. The explosion-proof combustible gas detector according to claim 1, characterized in that: The connecting assembly comprises a fixing plate (7), the outer side of the fixing plate (7) is an arc-shaped wall, the inner side of the fixing plate (7) is provided with a slot (8), the top and bottom of the inner wall of the slot (8) are respectively convex to form a first inclined surface (9), the distance between the two first inclined surfaces (9) decreases from the inside to the outside, and an arc surface (10) is provided at the edge of one side where the two first inclined surfaces (9) are relatively close to each other.

7. The explosion-proof combustible gas detector according to claim 6, characterized in that: The connection assembly also includes a clamping block (12), both ends of which are provided with second inclined surfaces (13), and the clamping block (12) is elastically clamped with the inner wall of the clamping slot (8).

8. The explosion-proof combustible gas detector according to claim 1, characterized in that: A rubber sleeve (3) is fixedly provided on the inner wall of the connecting pipe (2), and the inner wall of the rubber sleeve (3) is clamped with the air inlet end of the detector body (1).

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