Labyrinth for smoke sensor capable of resisting wind field disturbance

Abstract

The utility model discloses a wind field disturbance resistant maze for a smoke sensor, which comprises a bottom plate, an external shielding part and an internal shielding part are arranged on the bottom plate, a buffer channel is formed between the internal shielding part and the external shielding part, and an accommodating cavity for accommodating the smoke sensor is formed by the internal shielding part and the bottom plate; the outer shield is provided with an outer air inlet channel communicated with the buffer channel, the outer air inlet channel is opposite to the outer wall of the inner shield, the inner shield is provided with an inner air inlet channel enabling the buffer channel to be communicated with the containing cavity, and the inner air inlet channel is opposite to the inner wall of the outer shield. Through the structure of the external shielding, the internal shielding and the buffer channel, the novel photoelectric smoke sensing maze has the functions of a traditional photoelectric smoke sensing maze and also has two additional functions of wind direction adjustment, namely, wind power weakening and forward or reverse wind adjustment, it is ensured that external wind fields can only be blown in vertically, disturbance of different wind directions is avoided, and the smoke sensing effect is improved. Therefore, an external stable wind field environment is constructed, and the stability and reliability of smoke data acquisition when the photoelectric smoke sensor works are ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of fire alarm related equipment, in particular to a maze for a smoke sensor resistant to wind field disturbance. Background Art

[0002] Smoke sensors, especially those used in conjunction with optoelectronic smoke sensors, generally need to avoid interference from stray light or foreign objects. For some special usage scenarios, such as the equipment compartments and battery compartments under vehicles of public transportation such as subways, high-speed rails, and buses, when optoelectronic smoke detection is used for fire prevention and control, there are scenarios of two-way driving or open traffic driving. When the relatively high speed generates a large airflow that interferes with the operation of the smoke sensor, the stability and reliability of data collection are affected.

[0003] Therefore, there is an urgent need for a maze that can reduce the influence of large external airflows on the stability and reliability of smoke data collection when the smoke sensor is working. Summary of the Utility Model

[0004] To solve the technical problems in the background art, the utility model proposes a maze for a smoke sensor resistant to wind field disturbance.

[0005] The maze for a smoke sensor resistant to wind field disturbance proposed by the utility model includes a bottom plate. An external shield is provided on the bottom plate, and an internal shield part is sleeved inside the external shield. A buffer channel is formed between the internal shield and the external shield, and a receiving cavity is formed between the internal shield and the bottom plate. Similar to the prior art, the receiving cavity is used to accommodate the smoke sensor.

[0006] The external shield has an external air inlet channel communicating with the buffer channel, and the external air inlet channel faces the outer wall of the internal shield. The internal shield has an internal air inlet channel communicating the buffer channel and the receiving cavity, and the internal air inlet channel faces the inner wall of the external shield.

[0007] The external gas enters the receiving cavity and then enters the smoke sensor after passing through the external air inlet channel, the buffer channel, and the internal air inlet channel in sequence. Through the structures of the external shield, the internal shield, and the buffer channel, the wind direction can weaken the wind force and adjust the positive or reverse wind, and can only blow in vertically, constructing a stable external wind field environment, ensuring the stability and reliability of data collection of the optoelectronic smoke sensor.

[0008] Further, the width of the external air inlet channel gradually decreases from the side far from the receiving cavity to the side close to the receiving cavity.

[0009] Preferably, the width of the internal air inlet channel gradually increases from the side far from the receiving cavity to the side close to the receiving cavity.

[0010] Preferably, a plurality of the external air inlet channels and a plurality of the internal air inlet channels are provided, and the plurality of internal air inlet channels and the plurality of external air inlet channels are all distributed along the outer periphery of the accommodating cavity.

[0011] Preferably, one end of the external shield away from the bottom plate has an extending portion extending outward, and the extending portion has a mounting structure.

[0012] Preferably, the external shield includes an outer angle mounting plate, and a plurality of groups of the outer angle mounting plates are provided. The plurality of groups of outer angle mounting plates are distributed along the outer periphery of the accommodating cavity, and an external air inlet channel is formed between any two adjacent groups of the outer angle mounting plates.

[0013] Preferably, the internal shield includes an inner angle mounting plate, and a plurality of groups of the inner angle mounting plates are provided. The plurality of groups of inner angle mounting plates are distributed along the outer periphery of the accommodating cavity, and an internal air inlet channel is formed between any two adjacent groups of the inner angle mounting plates.

[0014] Preferably, a reinforcing ring is further included, and the reinforcing ring is fixed between the external shield and the internal shield.

[0015] Preferably, a connecting member for connecting the external shield and the internal shield is provided at one end of the external shield and the internal shield away from the bottom plate.

[0016] In the present utility model, the maze for a wind field disturbance-resistant smoke sensor proposed, through the structures of the external shield, the internal shield and the buffer channel, in addition to having the functions of a traditional optoelectronic smoke sensing maze, also newly has two functions for wind direction adjustment: one is to weaken the wind force, and the other is to adjust the forward or reverse wind, ensuring that the external wind field can only blow in vertically, 避免不同风向的扰动 , thereby constructing a stable external wind field environment and ensuring the stability and reliability of smoke data collection when the optoelectronic smoke sensor works.

[0017] The additional aspects and advantages of the present utility model will be partially given in the following description, partially become obvious from the following description, or be understood through the practice of the present utility model. Description of the Drawings

[0018] Figure 1 is a schematic structural diagram of the present utility model;

[0019] Figure 2 is a schematic structural diagram of the present utility model after removing the connecting member;

[0020] Figure 3 is a schematic structural diagram of the external shield, the internal shield and the bottom plate of the present utility model;

[0021] In the figure: 1, bottom plate; 2, external shield; 3, internal shield; 4, external air inlet channel; 5, internal air inlet channel; 6, outer corner-shaped mounting plate; 7, inner corner-shaped mounting plate; 8, extension part; 9, reinforcing ring; 10, connecting piece; 11, buffer channel. Detailed implementation mode

[0022] The embodiments of the present invention will be described in detail below. The examples of the embodiments are shown in the drawings, in which the same or similar symbols represent the same or similar elements or elements with the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary and are only used to explain the present invention and should not be construed as a limitation to the present invention.

[0023] As Figures 1-3 shown, a maze for a smoke sensor against wind field disturbance includes a bottom plate 1. An external shield 2 and an internal shield 3 sleeved inside the external shield 2 are provided on the bottom plate 1. A buffer channel 11 is formed between the internal shield 3 and the external shield 2. The internal shield 3 and the bottom plate 1 form a receiving cavity for accommodating the smoke sensor.

[0024] The external shield 2 has an external air inlet channel 4 communicating with the buffer channel 11. The external air inlet channel 4 faces the outer wall of the internal shield 3. The internal shield 3 has an internal air inlet channel 5 communicating the buffer channel 11 and the receiving cavity. The internal air inlet channel 5 faces the inner wall of the external shield 2, that is, the external air inlet channel 4 and the internal air inlet channel 5 are arranged in an interlaced manner, and the external air inlet channel 4 is not directly communicated with the internal air inlet channel 5. When the external air flow is large, the air flow first collides with the outer wall of the internal shield 3 through the external air inlet channel 4 and then enters the buffer channel 11. The gas in the buffer channel 11 then enters the receiving cavity for accommodating the smoke sensor through the internal air inlet channel 5. Through the structures of the external shield 2, the external air inlet channel 4, the internal shield 3, the internal air inlet channel 5 and the buffer channel 11, the wind direction can weaken the wind force and adjust the positive or reverse wind, and can only blow in vertically, constructing a stable external wind field environment and ensuring the stability and reliability of the data acquisition of the optoelectronic smoke sensor.

[0025] In some embodiments, in order to further increase the stability and reliability of the data acquisition of the smoke sensor, further, the width of the external air inlet channel 4 gradually decreases from the side away from the receiving cavity to the side close to the receiving cavity.

[0026] In some embodiments, in order to further increase the stability and reliability of the data acquisition of the smoke sensor, further, the width of the internal air inlet channel 5 gradually increases from the side away from the receiving cavity to the side close to the receiving cavity.

[0027] To increase the accuracy of data collection, preferably, a plurality of outer air intake channels 4 and a plurality of inner air intake channels 5 are provided. The plurality of inner air intake channels 5 and the plurality of outer air intake channels 4 are both distributed along the outer periphery of the accommodating cavity, increasing the fluidity of the gas in the accommodating cavity.

[0028] To facilitate the installation of this labyrinth, one end of the external shield 2 away from the bottom plate 1 has an extending portion 8 extending outward. The extending portion 8 has an installation structure, and the extending portion 8 can be fixed to a wall or a plate body through structures such as screws or fixing pins.

[0029] Specifically, in some embodiments, the external shield 2 includes an outer corner mounting plate 6. The outer corner mounting plate 6 is a right-angle plate, and the open end of the outer corner mounting plate 6 faces the direction of the accommodating cavity. A plurality of groups of outer corner mounting plates 6 are provided, and the plurality of groups of outer corner mounting plates 6 are distributed along the outer periphery of the accommodating cavity, and an outer air intake channel 4 is formed between any two adjacent groups of outer corner mounting plates 6. On the one hand, it facilitates the formation of the outer air intake channel 4, and on the other hand, it facilitates the formation of an outer air intake channel 4 with a variable width.

[0030] Specifically, in some embodiments, the internal shield 3 includes an inner corner mounting plate 7. The inner corner mounting plate 7 is a right-angle plate, and the open end of the inner corner mounting plate 7 faces away from the direction of the accommodating cavity. A plurality of groups of inner corner mounting plates 7 are provided, and the plurality of groups of inner corner mounting plates 7 are distributed along the outer periphery of the accommodating cavity, and an inner air intake channel 5 is formed between any two adjacent groups of inner corner mounting plates 7. On the one hand, it facilitates the formation of the inner air intake channel 5, and on the other hand, it facilitates the formation of an inner air intake channel 5 with a variable width;

[0031] Specifically, the inner air intake channel 5 is opposite to the bending portion of the outer corner mounting plate 6, and the outer air intake channel 4 is opposite to the bending portion of the inner corner mounting plate 7.

[0032] Preferably, it further includes a reinforcing ring 9. The reinforcing ring 9 is fixed between the external shield 2 and the internal shield. The outer side of the reinforcing ring 9 is connected to the outer corner mounting plate 6, and the inner side of the reinforcing ring 9 is fixed to the inner corner mounting plate 7, thereby facilitating the formation of a buffer groove with a bending structure, increasing the buffer effect, and at the same time facilitating the fixation and limitation of the inner corner mounting plate 7 and the outer corner mounting plate 6, increasing the overall strength thereof. The height of the reinforcing ring 9 is much smaller than the heights of the external shield 2 and the internal shield 3.

[0033] Preferably, one end of the external shield 2 and the internal shield 3 away from the bottom plate 1 is provided with a connecting member 10 for connecting the external shield 2 and the internal shield 3. In some embodiments, the extending portion 8 is provided on the connecting member 10. The connecting member 10 is annular, increasing the stability of the outer corner mounting plate 6 and the inner corner mounting plate 7.

[0034] It should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present invention.

[0035] In addition, the terms "first" and "second" are only used for descriptive purposes and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In the description of the present invention, the meaning of "a plurality" is at least two, such as two, three, etc., unless otherwise specifically and clearly defined.

[0036] In the present invention, unless otherwise clearly specified and limited, the terms such as "mounted", "connected", "connected to", "fixed" and the like should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection, an electrical connection or communicable with each other; it may be directly connected, or indirectly connected through an intermediate medium. It may be the communication inside two elements or the interaction relationship between two elements, unless otherwise clearly limited. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0037] In the present invention, unless otherwise clearly specified and limited, the first feature being "on" or "under" the second feature may be that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature may be that the first feature is directly above or obliquely above the second feature, or merely indicates that the first feature has a higher horizontal height than the second feature. The first feature being "under", "beneath" and "underneath" the second feature may be that the first feature is directly below or obliquely below the second feature, or merely indicates that the first feature has a lower horizontal height than the second feature.

[0038] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution and inventive concept of the present invention, makes equivalent substitutions or changes, and should be covered by the protection scope of the present invention.

Claims

1. A maze for smoke sensors resistant to wind field disturbances, characterized in that: The invention comprises a bottom plate (1), the bottom plate (1) being provided with an external shield (2) and an internal shield (3) sleeved inside the external shield (2), a buffer channel (11) being formed between the internal shield (3) and the external shield (2), and the internal shield (3) and the bottom plate (1) forming a receiving cavity for receiving a smoke sensor; The external shield (2) has an external air intake channel (4) connected to the buffer channel (11), and the external air intake channel (4) is opposite to the outer wall of the internal shield (3). The internal shield (3) has an internal air intake channel (5) connecting the buffer channel (11) and the accommodating cavity, and the internal air intake channel (5) is opposite to the inner wall of the external shield (2).

2. The maze for smoke sensor resistant to wind field disturbance according to claim 1, characterized in that: The width of the external air inlet channel (4) gradually decreases from a side away from the accommodating cavity to a side close to the accommodating cavity.

3. The maze for smoke sensor resistant to wind field disturbance according to claim 1, characterized in that: The width of the inner air inlet channel (5) gradually increases from a side away from the accommodating cavity to a side close to the accommodating cavity.

4. The maze for smoke sensor resistant to wind field disturbance according to claim 1, characterized in that: The outer air intake channel (4) and the inner air intake channel (5) are both provided in plurality, and the plurality of the inner air intake channels (5) and the plurality of the outer air intake channels (4) are both distributed along the periphery of the accommodating cavity.

5. The maze for smoke sensor resistant to wind field disturbance according to claim 1, characterized in that: An end of the external shield (2) away from the bottom plate (1) has an extension portion (8) extending outwards, and a mounting structure is provided on the extension portion (8).

6. The maze for smoke sensor resistant to wind field disturbance according to claim 1, characterized in that: The external shielding (2) comprises an outer corner mounting plate (6), wherein a plurality of groups of the outer corner mounting plates (6) are provided, the plurality of groups of the outer corner mounting plates (6) are distributed along the periphery of the accommodating cavity, and an outer air intake channel (4) is formed between any two adjacent groups of the outer corner mounting plates (6).

7. The maze for smoke sensor resistant to wind field disturbance according to claim 1, characterized in that: The internal shielding (3) comprises an inner angle mounting plate (7), wherein a plurality of groups of the inner angle mounting plates (7) are provided, wherein the plurality of groups of the inner angle mounting plates (7) are distributed along the periphery of the accommodating cavity and an inner air intake channel (5) is formed between any two adjacent groups of the inner angle mounting plates (7).

8. The maze for smoke sensor resistant to wind field disturbance according to claim 1, characterized in that: It also comprises a reinforcement ring (9), wherein the reinforcement ring (9) is fixed between the outer shield (2) and the inner shield (3).

9. The maze for smoke sensor resistant to wind field disturbance according to claim 1, characterized in that: A connecting piece (10) for connecting the external shield (2) and the internal shield (3) is provided at one end away from the bottom plate (1).

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