Filtering device for industrial and commercial point type combustible gas detector

Abstract

The utility model provides a filtering device for an industrial and commercial point type combustible gas detector. The filtering device comprises a detection head and a filter, the filter is clamped on the detection head and is used for filtering oil smoke and water vapor entering the detection head; the filter comprises a shell, a first annular plate and a second annular plate; the first annular plate and the second annular plate are coaxially arranged in the shell; a first air passing hole is formed in the side wall of the first annular plate; a second air passing hole is formed in the second annular plate; a middle channel of the second annular plate is communicated with an inlet channel entering the detection head; an air inlet is formed in the end face of the shell. According to the detector, the plurality of gas inlet channels are arranged, so that oil fume and water vapor in the to-be-detected gas are fully filtered, the detection head is prevented from being blocked by the oil fume and the water vapor, the service life of the detector is prolonged, the maintenance frequency is reduced, and the filtering device can be quickly disassembled and cleaned.

Description

Technical Field

[0001] The utility model relates to the technical field of gas safety monitoring, in particular to a filtering device for point-type combustible gas detectors for industrial and commercial purposes. Background Art

[0002] The filter device plays an important role as the pre-filter structure of the combustible gas detector. It can filter the oil smoke and water vapor entering the detection head, thereby preventing the oil smoke and water vapor from adhering to the surface of the combustible gas detector and clogging the detection head of the combustible gas detector.

[0003] The existing technology has major drawbacks in the oil smoke and water vapor filtration of industrial and commercial point-type combustible gas detectors. When industrial and commercial point-type combustible gas detectors are used for a long time in an environment with high oil pollution and water vapor, the detection head is prone to blockage. Once blocked, the industrial and commercial point-type combustible gas detectors will fail and will not be able to detect combustible gas normally, thus causing gas safety hazards. Utility Model Content

[0004] The utility model discloses a filtering device for industrial and commercial point-type combustible gas detectors, which aims to solve the technical problem that the detection heads of existing industrial and commercial point-type combustible gas detectors are easily clogged when used for a long time in an environment with high oil pollution and water vapor. Once clogged, the industrial and commercial point-type combustible gas detectors will become ineffective and unable to detect combustible gas normally, thus causing gas safety hazards.

[0005] In order to achieve the above purpose, the present invention adopts the following technical solutions:

[0006] A filtering device for industrial and commercial point-type combustible gas detectors, comprising: a detection head, a filter;

[0007] The filter is clamped on the detection head and is used to filter the oil smoke and water vapor entering the detection head;

[0008] The filter comprises: a housing, a first annular plate, and a second annular plate;

[0009] The first annular plate and the second annular plate are both coaxially arranged inside the housing; the first annular plate is located between the second annular plate and the side wall of the housing;

[0010] A first air hole is provided on the side wall of the first annular plate; a second air hole is provided on the second annular plate; the middle channel of the second annular plate is connected to the inlet channel of the detection head; and an air inlet is provided on the end face of the shell.

[0011] Furthermore, the first annular plate and the second annular plate divide the inner space of the housing into a first air inlet channel, a second air inlet channel, and an intermediate channel;

[0012] The air inlet is provided at the end surface of the first air inlet channel corresponding to the shell and at the end surface of the second air inlet channel corresponding to the shell;

[0013] Furthermore, a positioning device is provided in the shell, a positioning hole is opened on the filter, and the positioning device is adapted to the positioning hole; the shell is plugged into the positioning hole and connected to the detection head through the positioning device.

[0014] Furthermore, the positioning device is a cross connecting column; the positioning hole is a cross connecting hole; and the positioning device is fixedly connected to the housing.

[0015] Furthermore, the coaxial array of air inlets is opened on the end surface of the shell.

[0016] Furthermore, the air inlet is located at a position of the middle channel corresponding to the end surface of the shell; and the diameter of the air inlet gradually decreases from the outside to the inside.

[0017] Furthermore, a plurality of fins are radially arranged on the outer side wall of the first annular plate.

[0018] Furthermore, the fin plates are evenly distributed axially along the outer side wall of the first annular plate; and the first air holes are opened between two adjacent fin plates.

[0019] From the above, it can be seen that the utility model provides a filtering device for point-type combustible gas detectors for industrial and commercial purposes, including: a detection head, a filter; the filter is clamped on the detection head, and is used to filter the oil smoke and water vapor entering the detection head; the filter includes: an outer shell, a first annular plate, and a second annular plate; the first annular plate and the second annular plate are both coaxially arranged inside the outer shell; the first annular plate is located between the second annular plate and the side wall of the outer shell; a first air hole is provided on the side wall of the first annular plate; a second air hole is provided on the second annular plate; the middle channel of the second annular plate is connected to the inlet channel entering the detection head; and an air inlet is provided on the end face of the outer shell. The present application divides the outer shell into multiple air inlet channels by setting a first annular plate and a second annular plate, adopts multi-hole air intake and forms a tortuous gas channel between the detection head. The combustible gas mixed with oil smoke and water needs to pass through this tortuous gas channel before it can enter the detection head and be detected. In the process of passing through the tortuous gas channel, the oil smoke and water vapor will adhere to the inner wall of the tortuous gas channel of the filter device, thereby reducing the amount of oil smoke and water vapor entering the detection head, avoiding the blockage of the detection head by oil smoke and water vapor, thereby extending the service life of the detector, reducing the number of maintenance times, and the filter device can be quickly disassembled and cleaned. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 A structural diagram of a filtering device.

[0021] Figure 2 This is a schematic diagram of the end face structure of a filtering device.

[0022] Figure 3 The figure is a schematic diagram of the assembly structure of a filter device and a detection head.

[0023] Figure 4 The figure is a schematic diagram of the assembly structure of a filter device and a detector as a whole.

[0024] In the accompanying drawings: 1. Outer shell, 2. Positioning device, 3. Air inlet, 4. Detection head; 5. First annular plate, 6. Second annular plate; 7. First air hole; 8. Second air hole; 9. First air inlet channel, 10. Second air inlet channel, 11. Intermediate channel; 12. Positioning hole; 13. Fin plate. DETAILED DESCRIPTION

[0025] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0026] like Figures 1-4As shown, the utility model discloses a filtering device for a point-type combustible gas detector for industrial and commercial use, comprising: a detection head 4, a filter; the filter is clamped on the detection head 4, and is used to filter the oil smoke and water vapor entering the detection head 4; the filter comprises: an outer shell 1, a first annular plate 5, and a second annular plate 6; the first annular plate 5 and the second annular plate 6 are both coaxially arranged inside the outer shell 1; the first annular plate 5 is located between the second annular plate 6 and the side wall of the outer shell 1; a first air hole 7 is provided on the side wall of the first annular plate 5; a second air hole 8 is provided on the second annular plate 6; the middle channel 11 of the second annular plate 6 is connected to the inlet channel entering the detection head 4; and an air inlet 3 is provided on the end face of the outer shell 1.

[0027] In this embodiment, Figure 1 、 Figure 3 As shown, the detection head 4 and the filter are connected by plugging. In actual use, if the filter needs to be cleaned, the filter can be directly removed from the detection head 4 and installed and reset after cleaning. The operation is simple and easy to use.

[0028] In this embodiment, the detection head 4 is an existing detection head 4, and this application does not make any improvements to it, and it can be obtained directly. This application aims to provide a filter with better filtering performance and more convenient for users to use.

[0029] Specifically, see Figure 1 As shown, the filter in the present application includes a shell 1, a first annular plate 5, and a second annular plate 6; the first annular plate and the second annular plate 6 are jointly arranged in the shell 1, and the end faces are flush with the open end face of the shell 1. During use, the gas to be detected enters the shell 1 from the air inlet 3 opened on the end face of the shell 1. Due to the arrangement of the two annular plates, the internal space of the shell 1 is divided into multiple space areas. Specifically, the first annular plate 5 and the second annular plate 6 divide the internal space of the shell 1 into a first air inlet channel 9, a second air inlet channel 10, and an intermediate channel 11; the first air inlet channel 9 corresponding to the end face of the shell 1 and the second air inlet channel 10 corresponding to the end face of the shell 1 are both provided with the air inlet 3.

[0030] The gas to be detected entering the housing 1 from the air inlet 3 can enter the first air inlet channel 9 and / or the second air inlet channel 10. After passing through the first air inlet channel 9, the gas enters the second air inlet channel from the first air hole 7 opened on the first annular plate 5, and enters the intermediate channel 11 from the second air hole 8 opened on the second air inlet channel 10, and then moves toward the detection head 4; the gas to be detected entering the second air inlet channel 10 enters the intermediate channel 11 through the second air hole 8 opened on the second air inlet channel 10, and then moves toward the detection head 4.

[0031] It can be seen that by adopting the technical solution of the present application, the gas to be detected needs to pass through multiple bends in the channel before it can contact the detection head 4. In the process of the gas to be detected contacting the inner walls of each channel, the oil smoke and water vapor can be effectively filtered, and the detection head 4 can be prevented from being blocked. At the same time, it can be quickly disassembled and cleaned.

[0032] In this embodiment, the present application adopts multi-pore air intake and forms a tortuous gas channel between the detection head 4 of the industrial and commercial point-type combustible gas detector. The combustible gas mixed with oil smoke and water needs to pass through this tortuous gas channel before it can enter the detection head 4 of the industrial and commercial point-type combustible gas detector, so that it can be detected. In the process of passing through the tortuous gas channel, the oil smoke and water vapor will adhere to the tortuous gas channel of the filter device, thereby reducing the oil smoke and water vapor entering the detection head 4 of the industrial and commercial point-type combustible gas detector, avoiding the blockage of the detection head 4 by oil smoke and water vapor, thereby extending the service life of the industrial and commercial point-type combustible gas detector, reducing the number of maintenance times, and the filter device can be quickly disassembled and cleaned.

[0033] In a specific embodiment, a positioning device 2 is provided in the housing 1 , a positioning hole 12 is opened on the filter, and the positioning device 2 is adapted to the positioning hole 12 ; the housing 1 is plugged into the positioning hole 12 through the positioning device 2 and plugged into the detection head 4 .

[0034] In this embodiment, see Figure 1 As shown, as a preferred embodiment, the positioning device 2 is a cross-connecting column; the positioning hole 12 is a cross-connecting hole; and the positioning device 2 is fixedly connected to the housing 1. In actual use, the cross-connecting column provided on the housing 1 is directly inserted into the cross-connecting hole on the detection head 4, thereby completing the connection between the filter housing 1 and the detection head 4. This is simple to operate and easy to use, making it easy for users to clean the filter later and replace the filter if it is damaged.

[0035] In one embodiment, see Figure 2As shown, the air inlets 3 are coaxially arranged in an array on the end face of the housing 1. This arrangement makes the end face of the housing 1 more regular.

[0036] In a specific embodiment, an air inlet 3 can be provided on the end surface of the housing 1 corresponding to the intermediate channel 11, such as Figure 2 As shown, the air inlet 3 is located at the end surface of the intermediate channel 11 corresponding to the housing 1 ; the diameter of the air inlet 3 decreases gradually from the outside to the inside.

[0037] Specifically, since the first air inlet channel 9 located on the outermost side corresponds to the air inlet 3 on the end face of the outer shell 1, the distance the gas to be detected inside it needs to travel is the longest. Similarly, the air inlet 3 located on the second air inlet channel 10 corresponding to the end face of the outer shell 1 is slightly reduced, because the distance the corresponding gas to be detected inside it needs to travel is smaller than the distance of the outermost first air inlet channel 9; and so on, the air inlet 3 on the end face of the outer shell 1 corresponding to the middle channel 11 becomes smaller and smaller, because the gas entering the middle channel 11 in the outer shell 1 from the middle air inlet 3 is the farthest away from the inner wall of the first annular plate 5, so the diameter of the air inlet 3 there is the smallest.

[0038] In a specific embodiment, a plurality of fins 13 are radially arranged on the outer side wall of the first annular plate 5, see Figure 1 As shown, the provision of the fin plate 13 can further increase the contact area between the gas to be detected entering the first air inlet channel 9 and the inner wall of the first air inlet channel 9, thereby further improving the filtering effect of the filter.

[0039] In a specific embodiment, the fin plates 13 are evenly distributed axially along the outer side wall of the first annular plate 5 ; and the first air holes 7 are provided between two adjacent fin plates 13 .

[0040] In this embodiment, the first air hole 7 is opened between two adjacent fins 13, so that the gas in the first air inlet channel enters the second air inlet channel from the first air hole 7. Figure 1 As shown, as a preferred embodiment, the first air hole 7 is opened at the bottom end of the first annular plate 5. After the filter and the detection head 4 are assembled, the first air hole 7 is closer to the detection head 4. In this way, the moving stroke length of the gas to be detected in the first air passage can be increased, which is more conducive to improving the filtering performance of the filter.

[0041] Similarly, the second air hole 8 is formed at the bottom end of the second annular plate 6 , which can also increase the movement distance of the gas to be detected entering the second air passage and the intermediate passage 11 , and is more conducive to improving the filtering performance of the filter.

[0042] In this embodiment, during the assembly process, the filter device needs to be installed on the detection head 4 of the point-type combustible gas detector for industrial and commercial use. The specific operation is to first put the filter shell 1 on the detection head 4, and then rotate it to drive the positioning device 2 to rotate until the positioning device 2 is aligned with the positioning hole 12, and then press the filter shell 1 so that the two are smoothly stuck. At this time, the end of the positioning device 2 of the filter is stuck in the positioning hole 12 on the detection head 4, and then press the filter by hand so that its positioning structure is clamped with the positioning hole 12 of the detection head 4. At this time, the filter device is installed; when disassembling and cleaning the filter device, you only need to pull the filter downward in the vertical direction with force to separate the filter from the point-type combustible gas detector for industrial and commercial use. After completing the cleaning of the filter device, the filter device can be re-installed into the point-type combustible gas detector for industrial and commercial use according to the above method.

[0043] In this embodiment, the filtering device for industrial and commercial point-type combustible gas detectors provided by this application is designed with a new oil fume and water vapor filtering device structure, which can effectively filter oil fume and water vapor, thereby reducing the entry of oil fume and water vapor into the detection head 4 of the industrial and commercial point-type combustible gas detector, avoiding the blockage of the detection head 4 by oil fume and water vapor, thereby extending the service life of the industrial and commercial point-type combustible gas detector, reducing the number of maintenance times, and the filtering device can be quickly disassembled and cleaned.

[0044] The above description is merely a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. The replacements described may be partial structures, devices, or method steps, or they may be complete technical solutions. Any equivalent replacements or modifications based on the technical solution and the concept of the present invention shall be covered by the scope of protection of the present invention.

Claims

1. A filter device for industrial and commercial point-type combustible gas detectors, characterized in that: include: Detector head (4), filter; The filter is clamped on the detection head (4) and is used to filter the oil smoke and water vapor entering the detection head (4); The filter comprises: a housing (1), a first annular plate (5), and a second annular plate (6); The first annular plate (5) and the second annular plate (6) are both coaxially arranged inside the housing (1); the first annular plate (5) is located between the second annular plate (6) and the side wall of the housing (1); A first air hole (7) is provided on the side wall of the first annular plate (5); a second air hole (8) is provided on the second annular plate (6); a middle channel (11) of the second annular plate (6) is connected to an inlet channel leading to the detection head (4); and an air inlet (3) is provided on the end surface of the housing (1).

2. The filter device for industrial and commercial point-type combustible gas detectors according to claim 1, characterized in that: The first annular plate (5) and the second annular plate (6) divide the internal space of the housing (1) into a first air inlet channel (9), a second air inlet channel (10), and an intermediate channel (11); The air inlet (3) is provided at the end surface of the first air inlet channel (9) corresponding to the shell (1) and the end surface of the second air inlet channel (10) corresponding to the shell (1).

3. The filter device for industrial and commercial point-type combustible gas detectors according to claim 1, characterized in that: A positioning device (2) is provided in the housing (1), a positioning hole (12) is provided on the filter, and the positioning device (2) is adapted to the positioning hole (12); the housing (1) is plugged into the positioning hole (12) through the positioning device (2) and is plugged into the detection head (4).

4. The filter device for industrial and commercial point-type combustible gas detectors according to claim 3, characterized in that: The positioning device (2) is a cross connecting column; the positioning hole (12) is a cross connecting hole; and the positioning device (2) is fixedly connected to the housing (1).

5. The filter device for industrial and commercial point-type combustible gas detectors according to claim 1, characterized in that: The air inlets (3) are arranged in a coaxial array on the end surface of the housing (1).

6. The filter device for industrial and commercial point-type combustible gas detectors according to claim 5, characterized in that: The air inlet (3) is located at a position of the end surface of the intermediate channel (11) corresponding to the outer shell (1); the diameter of the air inlet (3) gradually decreases from the outside to the inside.

7. The filter device for industrial and commercial point-type combustible gas detectors according to claim 1, characterized in that: A plurality of fins (13) are radially arranged on the outer side wall of the first annular plate (5).

8. The filter device for industrial and commercial point-type combustible gas detectors according to claim 7, characterized in that: The fin plates (13) are evenly distributed axially along the outer side wall of the first annular plate (5); and the first air holes (7) are opened between two adjacent fin plates (13).

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