Waterproof sound transmission device for explosion-proof shell

Abstract

The utility model discloses a waterproof sound transmission device for an explosion-proof housing, which comprises a buzzer, the buzzer is installed on an end cover through a fixing ring, a fire-retardant net part and a waterproof sound transmission membrane are arranged between the fixing ring and the end cover, and the waterproof sound transmission membrane is clamped between a first multilayer screen element and a second multilayer screen element. According to the waterproof sound transmission device for the explosion-proof shell, the large-decibel buzzer can be installed in the explosion-proof shell, the requirement that a lamp is in a pure explosion-proof and explosion-proof type is met, and the requirement that the large-decibel output of the buzzer is also met.

Description

TECHNICAL FIELD

[0001] The utility model relates to a waterproof sound transmission device, especially a waterproof sound transmission device for explosion-proof enclosure. BACKGROUND

[0002] The existing explosion-proof buzzer is generally of the explosion-proof and safety-increasing composite type, and such a buzzer cannot be installed on a pure explosion-proof shell.

[0003] Alternatively, the buzzer is placed in a small explosion-proof shell, and the two are installed as a whole on the explosion-proof shell. SUMMARY

[0004] The utility model provides a waterproof sound transmission device for explosion-proof enclosure, which can install a large-dB buzzer in the explosion-proof shell, meeting the requirements of pure explosion-proof and explosion-proof type of lamps and the large-dB output of the buzzer.

[0005] The utility model provides a waterproof sound transmission device for explosion-proof enclosure, which can install a large-dB buzzer in the explosion-proof shell, meeting the requirements of pure explosion-proof and explosion-proof type of lamps and the large-dB output of the buzzer.

[0006] Further, the fire-retardant mesh component includes a corrugated strip-shaped element, the corrugated strip-shaped element is provided with a threaded pressing ring outside, one side of the corrugated strip-shaped element is provided with a first pressing plate, and the other side of the corrugated strip-shaped element is provided with a second pressing plate.

[0007] Further, the threaded pressing ring outer wall and the end cover inner wall form a threaded joint surface, and the corrugated strip-shaped element and the threaded pressing ring inner wall form a cylindrical joint surface.

[0008] Further, the first pressing plate surface is distributed with through holes to adjust the flame passage.

[0009] Further, the first multi-layer screen element and the second multi-layer screen element are sintered from multiple layers of stainless steel mesh, and the filtering precision is less than 100 microns.

[0010] The utility model provides a waterproof sound transmission device for explosion-proof enclosure, which can install a large-dB buzzer in the explosion-proof shell, meeting the requirements of pure explosion-proof and explosion-proof type of lamps and the large-dB output of the buzzer. BRIEF DESCRIPTION OF DRAWINGS

[0011] Figure 1 This is a cross-sectional structural diagram of the waterproof and sound-permeable device for explosion-proof enclosures according to this utility model;

[0012] Figure 2 This is a schematic diagram of the exploded structure of the waterproof and sound-permeable device for explosion-proof enclosures of this utility model;

[0013] Figure 3 This is a schematic diagram of the fire-resistant mesh component of the waterproof and sound-permeable device for explosion-proof enclosures according to this utility model.

[0014] The diagram is marked as follows:

[0015] 1. End cap 2. Retaining ring 3. Buzzer

[0016] 4 First multi-layer screen element; 5 Waterproof and sound-permeable membrane; 6 Second multi-layer screen element

[0017] 7. Fire-retardant mesh component; 8. Threaded joint surface; 9. Cylindrical joint surface.

[0018] 71 First pressure plate 72 Second pressure plate 73 Corrugated strip element

[0019] 74 Threaded pressure ring Detailed Implementation

[0020] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0021] Figure 1 This is a cross-sectional structural diagram of the waterproof and sound-permeable device for explosion-proof enclosures according to this utility model; Figure 2 This is a schematic diagram of the explosion structure of the waterproof and sound-permeable device for explosion-proof enclosures according to this utility model.

[0022] Please see Figure 1 and Figure 2 The waterproof and sound-permeable device for explosion-proof enclosure provided by this utility model includes a buzzer 3, which is mounted on the end cover 1 by a fixing ring 2. A fire-resistant mesh component 7 and a waterproof and sound-permeable membrane 5 are provided between the fixing ring 2 and the end cover 1. The waterproof and sound-permeable membrane 5 is sandwiched between a first multi-layer screen element 4 and a second multi-layer screen element 6.

[0023] The present invention provides a waterproof and sound-permeable device for explosion-proof enclosures. Figure 1 The area within the dashed box is a waterproof and sound-permeable structure, which mainly includes a flame-arresting mesh component 7, a waterproof and sound-permeable membrane 5, multi-layer screen elements, and an end cap 1. The waterproof and sound-permeable membrane 5 is installed between two multi-layer screen elements, serving as an auxiliary waterproofing element. The end cap 1, as part of the explosion-proof enclosure, has a threaded joint surface with the flame-arresting mesh component 7 on its inner wall.

[0024] The waterproof sound transmission device for the explosion-proof enclosure has the functions of preventing water, sound transmission and explosion-proof. Figure 3 Preferably, the fire-retardant mesh component 7 comprises a corrugated belt-shaped element 73, the corrugated belt-shaped element 73 is externally provided with a threaded pressing ring 74, one side of the corrugated belt-shaped element 73 is provided with a first pressing plate 71, and the other side is provided with a second pressing plate 72.

[0025] The waterproof sound transmission device for the explosion-proof enclosure has the functions of preventing water, sound transmission and explosion-proof.

[0026] The first multi-layer screen element 4 and the second multi-layer screen element 6 are sintered by multiple layers of stainless steel meshes, and the filtering precision is less than 100 microns.

[0027] The waterproof sound transmission device for the explosion-proof enclosure has the functions of preventing water, sound transmission and explosion-proof.

[0028] Although the utility model has disclosed as above with preferred embodiment, it is not used to limit the utility model, any person skilled in the art can make some modification and improvement without departing from the spirit and scope of the utility model, therefore the protection scope of the utility model should be limited by the claims.

Claims

1. A water-proof sound-transmitting device for an explosion-proof enclosure, characterized by, The application relates to a buzzer (3) which is installed on an end cover (1) through a fixing ring (2), wherein a fireproof screen component (7) and a waterproof sound transmission film (5) are arranged between the fixing ring (2) and the end cover (1), and the waterproof sound transmission film (5) is clamped between a first multilayer screen element (4) and a second multilayer screen element (6).

2. A water resistant acoustically transparent device for an explosion-proof enclosure as defined in claim 1, wherein, The fireproof screen component (7) comprises a corrugated strip-shaped element (73), the outer wall of the corrugated strip-shaped element (73) is provided with a threaded pressing ring (74), one side of the corrugated strip-shaped element (73) is provided with a first pressing plate (71), and the other side of the corrugated strip-shaped element is provided with a second pressing plate (72).

3. A water resistant acoustically transparent device for an explosion-proof enclosure as defined in claim 2, wherein, The inner wall of the threaded pressing ring (74) and the inner wall of the end cover (1) form a threaded joint surface (8), and the inner wall of the corrugated strip-shaped element (73) and the threaded pressing ring (74) form a cylindrical joint surface (9).

4. A water resistant acoustical access for an explosion proof enclosure according to Claim 2, wherein, The first pressing plate (71) is provided with through holes on the surface for adjusting the flame passage.

5. A water resistant acoustical access for an explosion proof enclosure according to Claim 1, wherein, The first multilayer screen element (4) and the second multilayer screen element (6) are sintered from multilayer stainless steel screens, and the filtering precision is less than 100 microns.

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