Multi-disaster sound-light alarm device with quick disassembly and assembly function

Abstract

The invention discloses a multi-disaster acousto-optic alarm device with a quick disassembly and assembly function, and relates to the technical field of acousto-optic alarms. A mounting groove is formed in the front face of the anti-explosion shell, and a detachable warning illuminating lamp is embedded into the mounting groove. A movable mounting seat is arranged at the lower end of the mounting groove, the warning illuminating lamp and the movable mounting seat form an outward deflection and separation structure at the mounting groove by taking a movable shaft as a shaft, and an electric ejector rod is mounted between the mounting groove and the warning illuminating lamp; a ventilation fan is installed in the explosion-proof shell and used for being matched with the detection module to conduct active ventilation detection, a detection air channel is reserved between the ventilation fan and the detection module, an attaching air hole is formed in the position, on the surface of the installation groove, of the side, close to the warning illuminating lamp, of the detection air channel, and a warning whistle is installed in the attaching air hole. The device has the advantages of being convenient and rapid to disassemble and assemble, flexible to use, good in protection performance, low in use cost, sensitive in active ventilation detection response, beneficial to rapid emergency response and capable of reducing disaster situation losses.

Description

Technical Field

[0001] The present invention relates to the technical field of acousto-optic alarms, and particularly to a multi-disaster acousto-optic alarm device with a quick disassembly and assembly function. Background Art

[0002] An acousto-optic alarm is a safety device that uses sound and light signals to alert people. It usually consists of a detector and an alarm control host, and also includes a sound generator and a light source, which are used to emit alarm signals in case of emergencies or occasions that require warning, reminding people to pay attention and take corresponding safety measures. Its working principle is based on the coordinated action of the sound generator and the light source. The sound generator generates an alarm sound, and at the same time the light source emits a strong beam of light, jointly constituting a strong audio-visual warning signal.

[0003] Such devices are commonly found in occasions such as fire alarms, security systems, and emergencies, and are used to detect disasters such as fires or gas leaks in indoor and outdoor dangerous places. In these occasions, once a disaster occurs, there may be unfavorable factors such as untimely fire fighting, lack of fire extinguishing equipment, panic among on-site personnel, and slow evacuation, ultimately resulting in significant losses of life and property. When an accident or fire occurs in the measured place, and there is fire smoke or toxic gas, the detector converts the signal into a voltage signal or a current signal and transmits it to the alarm instrument. When the concentration of smoke or toxic gas exceeds the alarm set value, the acousto-optic alarm signal is triggered, and a sound and light alarm signal is emitted through the acousto-optic alarm device to complete the alarm purpose, helping relevant personnel to respond quickly and take safety measures in time, thereby avoiding accidents such as explosions and gas leaks.

[0004] In existing devices, such as an acousto-optic alarm disclosed in CN208225228U, which includes a housing, a light-emitting element and a sound element are arranged inside the housing. The housing includes an upper cover and a lower cover. The light-emitting element and the sound element are arranged on the lower cover, and an opening through which the light emitted by the light-emitting element can pass is provided on the upper cover, and a lamp cover is installed at the opening. However, the overall structure of such devices is usually fixed. On the one hand, it is not convenient to flexibly select and disassemble the detection module according to different disaster situations, and it is not easy to disassemble and replace for use. There are also some devices that use external independent warning lights and independent speakers, which are large in size and lack protection, and have poor flexibility in use. In view of this, in-depth research has been carried out on the above problems, and thus this case has arisen. Summary of the Invention

[0005] The purpose of the present invention is to provide a multi-disaster acousto-optic alarm device with a quick disassembly and assembly function, so as to solve the problems of inconvenient disassembly and assembly of the acousto-optic alarm components and poor flexibility in use mentioned in the above background art.

[0006] To achieve the above object, the present invention provides the following technical solution: A multi-disaster type sound and light alarm device with a quick disassembly and assembly function, including an explosion-proof housing with a built-in controller and a detection module;

[0007] An installation groove is formed on the front surface of the explosion-proof housing, and a detachable warning lighting lamp is embedded in the installation groove;

[0008] A movable mounting seat for mounting the warning lighting lamp is arranged at the lower end of the installation groove, and the movable mounting seat and the installation groove are movably connected through a movable shaft;

[0009] The warning lighting lamp and the movable mounting seat form an outward deflection and detachment structure at the installation groove with the movable shaft as the axis, and an electric ejector rod is installed between the installation groove and the warning lighting lamp;

[0010] A ventilation fan is installed inside the explosion-proof housing for actively ventilating and detecting in cooperation with the detection module, and a detection air duct is left between the ventilation fan and the detection module. A fitting air hole is opened on the surface of the installation groove on the side close to the warning lighting lamp, and a warning whistle is installed in the fitting air hole;

[0011] When the warning lighting lamp is located inside the installation groove, the fitting air hole is in a closed state, and when the warning lighting lamp deflects and detaches from the installation groove, the fitting air hole opens.

[0012] Preferably, the overall deflection angle range of the warning lighting lamp and the movable mounting seat with the movable shaft as the axis outside the installation groove is 0-60°, and a limiting convex block is arranged on the side of the installation groove.

[0013] Adopting the above technical solution, the warning lighting lamp is usually stored inside the installation groove to play a protective role. Its movable structure design can pop out for light warning in case of disasters and other situations. At the same time, the popped-out warning lighting lamp can be easily removed, and the warning lighting lamp with a built-in battery can also be used for lighting in emergency situations.

[0014] Preferably, a movable top plate is arranged between the warning lighting lamp and the installation groove, and the lower end of the movable top plate is movably hinged to the installation groove;

[0015] The electric ejector rod is obliquely arranged between the movable top plate and the installation groove, and the upper and lower ends of the electric ejector rod are respectively movably hinged to the movable top plate and the installation groove, and the movable top plate and the warning lighting lamp are deflected and ejected by the electric ejector rod.

[0016] Adopting the above technical solution, the movable top plate is used to cooperate with the electric ejector rod to form a movable ejection structure, which can stably eject the warning lighting lamp and the movable mounting seat.

[0017] Preferably, a fitting plug is correspondingly arranged on the back surface of the movable top plate, and the fitting plug and the fitting air hole are correspondingly fitted.

[0018] By adopting the above technical solution, the fitting plug arranged on the back of the movable top plate can synchronously control the sealing opening and closing of the fitting plug on the fitting air hole when the electric push rod controls the opening and closing of the movable top plate, that is, when the movable top plate pushes out the warning light for warning lighting, the fitting air hole is opened at the same time, so that the air flow can pass through the warning whistle at the fitting air hole to make a whistle, thereby achieving the effect of sound and light alarm.

[0019] Preferably, a bayonet power connection slot is provided on the surface of the movable mounting seat for power connection of the warning light, and the warning light is powered by a built-in battery, and the warning light and the electric push rod both form a control circuit with the controller.

[0020] By adopting the above technical solution, the power connection slot of the movable mounting base is convenient for the disassembly and assembly of the warning light, and cooperates with the circuit connection. When in use, the detection module sends a signal to the controller when it detects an abnormal disaster signal. The controller sends a signal to control the start of the warning light and the electric push rod to make an audible and visual alarm.

[0021] Preferably, the warning lighting lamp and the surface of the mounting groove are both streamlined structures, and a limiting ear plate is integrally provided on the top of the warning lighting lamp, and the limiting ear plate fits with the surface of the mounting groove.

[0022] By adopting the above technical solution, the warning lighting lamp with a streamlined structure fits in the installation groove and can play a protective role in normal times. The limiting ear plate is used for matching and limiting fixation when the equipment is not in use.

[0023] Preferably, a ventilation grille is provided on the surface of the explosion-proof housing, and an air flow path is formed between the ventilation grille, the ventilation fan and the detection airway;

[0024] The detection airway corresponding detection module is provided with a plurality of branch pipes, and each branch pipe is provided with a corresponding solenoid valve to control the opening and closing of the airway.

[0025] By adopting the above technical solution, active ventilation is achieved through the air duct in conjunction with the ventilation fan, which makes it easy to cooperate with the detection module to quickly respond to detection in situations such as fire and smoke. Further, in conjunction with the use of the solenoid valve, the detection module corresponding to multiple disaster detection can be flexibly selected for use. The detection air duct can also be completely closed, leaving only the fitting air holes for ventilation, so that the airflow at the fitting air holes can be concentrated to blow the warning whistle to emit a sharper warning sound.

[0026] Preferably, a side slot is provided on the side of the explosion-proof housing for plugging and installing the detection module, and a cover plate is provided at the outer port of the side slot for structural closure.

[0027] By adopting the above technical solution, an optional disassembly and assembly solution is provided to the detection module through plug-in installation, and the detection module can be selected for use according to usage scenarios such as smoke particle or toxic gas detection.

[0028] Preferably, an insertion and fixing frame is integrally provided inside the sealing cover plate, the detection module is arranged inside the insertion and fixing frame, and the sealing cover plate and the insertion and fixing frame as a whole form a drawer-type movable disassembly and assembly structure outside the side slot.

[0029] Adopting the above technical solution, the disassembly and replacement structure formed by the sealing cover plate and the insertion and fixing frame facilitates the quick installation and disassembly of the detection module.

[0030] Preferably, a sealing gasket is arranged at the joint between the insertion and fixing frame and the side slot, and fixing bolts are connected between the sealing cover plate and the explosion-proof housing.

[0031] Adopting the above technical solution, the fixing bolts are used for the disassembly and fixing of the sealing cover plate. At the same time, the fitting of the sealing gasket can facilitate reducing the edge gap when some detection modules are connected to the detection air duct, ensuring the stability of the air flow.

[0032] Compared with the prior art, the beneficial effects of the present invention are: The multi-disaster type sound and light alarm device with a quick disassembly and assembly function has convenient quick disassembly and assembly characteristics and can be used flexibly. Specifically, it includes:

[0033] 1. By providing an installation groove, the warning lighting lamp is embeddedly installed, thereby providing better protection for the sound and light alarm, reducing the possibility of external interference. At the same time, the deflection structure of the movable mounting seat is combined with the ejecting function of the electric ejector rod. When a warning is issued, the warning lighting lamp can be ejected to an appropriate angle, ensuring that the sound and light alarm can play its warning role to the maximum extent, attracting people's attention, and enhancing the warning effect by combining with the sound of the warning whistle. In addition, in an emergency, the ejected warning lighting lamp can be disassembled separately for use as emergency lighting, which has better practicability;

[0034] 2. By providing the cooperation between the ventilation fan and the detection air duct, active ventilation detection is realized, which helps the detection module to respond quickly when a disaster occurs. At the same time, the detection air duct and the installation groove are designed with fitting air holes. When the warning lighting lamp pops out for warning, the fitting air holes will also be opened synchronously, and the air flow is used to drive the warning whistle to sound, which is synchronized with the sound and light warning of the warning lighting lamp, further enhancing the warning effect. In addition, the detection module beside the detection air duct can also be quickly and selectively disassembled and assembled at the side slot, making the sound and light alarm more convenient and flexible, enhancing the practicability of the device, facilitating flexible configuration and use in different occasions, and at the same time reducing the installation and maintenance costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0036] Figure 2 It is a schematic diagram of the overall structure when the warning lighting lamp and the sealing cover plate of the present invention pop out;

[0037] Figure 3 Schematic diagram of the overall structure when removing the warning lighting lamp of the present invention;

[0038] Figure 4 For the present invention Figure 3 Enlarged structure schematic diagram at position a in the present invention;

[0039] Figure 5 Schematic diagram of the split structure of the warning lighting lamp and the movable mounting base of the present invention;

[0040] Figure 6 Schematic diagram of the detection air duct structure of the present invention;

[0041] Figure 7 Schematic diagram of the internal structure of the detection air duct of the present invention;

[0042] Figure 8 Schematic diagram of the warning lighting lamp and the movable top plate of the present invention;

[0043] Figure 9 Schematic diagram of the electric push rod and the movable top plate of the present invention.

[0044] In the figure: 1, explosion-proof housing; 2, installation groove; 3, warning lighting lamp; 4, movable mounting base; 5, movable shaft; 6, electric push rod; 7, ventilation fan; 8, detection air duct; 9, fitting air hole; 10, warning whistle; 11, limit convex block; 12, movable top plate; 13, fitting plug; 14, power connection socket; 15, limit ear plate; 16, ventilation grille; 17, solenoid valve; 18, side socket; 19, cover plate; 20, plug-in fixing frame; 21, sealing gasket; 22, fixing bolt. Detailed implementation manners

[0045] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present invention.

[0046] Please refer to Figure 1-6, the present invention provides a technical solution: a multi-hazard acoustic-optical alarm device with a quick disassembly and assembly function, including an explosion-proof housing 1 with a built-in controller and a detection module; an installation groove 2 is opened on the front surface of the explosion-proof housing 1, and a detachable warning lighting lamp 3 is embedded in the installation groove 2; a movable mounting seat 4 for mounting the warning lighting lamp 3 is arranged at the lower end of the installation groove 2, and the movable mounting seat 4 and the installation groove 2 are movably connected through a movable shaft 5; the surfaces of both the warning lighting lamp 3 and the installation groove 2 are streamlined structures, and a limiting ear plate 15 is integrally arranged at the top end of the warning lighting lamp 3, and the limiting ear plate 15 fits with the surface of the installation groove 2. The streamlined warning lighting lamp 3 fits inside the installation groove 2, which can provide a protective effect usually, and the limiting ear plate 15 is used for cooperative limiting and fixing when the device is not in use.

[0047] Regarding the pop-up part of the warning lighting lamp 3:

[0048] The warning lighting lamp 3 and the movable mounting seat 4 form an outward deflection and detachment structure at the installation groove 2 with the movable shaft 5 as the axis, and an electric ejector rod 6 is installed between the installation groove 2 and the warning lighting lamp 3; the overall deflection angle range of the warning lighting lamp 3 and the movable mounting seat 4 with the movable shaft 5 as the axis outside the installation groove 2 is 0 - 60°, and a limiting convex block 11 is arranged on the side of the installation groove 2. Combining Figure 2 and Figure 8-Figure 9 As shown, a movable top plate 12 is arranged between the warning lighting lamp 3 and the installation groove 2, and the lower end of the movable top plate 12 is movably hinged to the installation groove 2; the electric ejector rod 6 is obliquely arranged between the movable top plate 12 and the installation groove 2, and the upper and lower ends of the electric ejector rod 6 are respectively movably hinged to the movable top plate 12 and the installation groove 2, and the electric ejector rod 6 is used to deflect and eject the movable top plate 12 and the warning lighting lamp 3. The movable top plate 12 is used to cooperate with the electric ejector rod 6 to form a movable ejection structure, and can stably eject the warning lighting lamp 3 and the movable mounting seat 4.

[0049] A bayonet power connection slot 14 is opened on the surface of the movable mounting seat 4 for the power connection of the warning lighting lamp 3, and the warning lighting lamp 3 is powered by a built-in battery, and both the warning lighting lamp 3 and the electric ejector rod 6 are connected to the controller to form a control circuit. The power connection slot 14 of the movable mounting seat 4 facilitates the disassembly, assembly and use of the warning lighting lamp 3, and at the same time cooperates for circuit connection. Usually, the warning lighting lamp 3 Figure 1 is stored inside the installation groove 2 to play a protective role, and its movable structure design can pop out for light warning in case of detecting disasters and other situations such as Figure 2 and at the same time, combining Figure 3-Figure 5As shown, the pop-up warning lighting lamp 3 can be easily removed, and the warning lighting lamp 3 with a built-in battery can also be used in emergency situations. When an accident or fire occurs in the measured area, and there is fire smoke or toxic gas, when the detection module detects an abnormal disaster signal, it sends a signal to the controller. When the concentration of smoke or toxic gas exceeds the alarm set value, the controller sends a signal to control the activation of the warning lighting lamp 3 and the electric push rod 6 for sound and light alarm, helping relevant personnel to quickly respond and take safety measures in a timely manner, thus avoiding greater disaster losses caused by accidents such as explosion and gas leakage. It is used for lighting below.

[0050] Regarding the active ventilation part of the ventilation fan 7:

[0051] Combined with Figure 2 and Figure 6-Figure 7 As shown, a ventilation fan 7 is installed inside the explosion-proof shell 1 for active ventilation detection in cooperation with the detection module. There is a detection air duct 8 left between the ventilation fan 7 and the detection module. A fitting air hole 9 is opened on the surface of the installation groove 2 on the side of the detection air duct 8 close to the warning lighting lamp 3, and a warning whistle 10 is installed in the fitting air hole 9; a ventilation grille 16 is opened on the surface of the explosion-proof shell 1, and an air flow path is formed among the ventilation grille 16, the ventilation fan 7 and the detection air duct 8; several branch pipes are provided corresponding to the detection module in the detection air duct 8, and each branch pipe is provided with a corresponding solenoid valve 17 to control the opening and closing of the air duct.

[0052] Through the air duct, active ventilation is carried out in cooperation with the ventilation fan 7, which is convenient for quickly responding and detecting in cooperation with the detection module in case of fire smoke, etc. Further, when used in cooperation with the solenoid valve 17, the detection module for detecting multiple disaster types can be flexibly selected for detection. The detection air duct 8 can also be completely closed, and only the fitting air hole 9 is left for ventilation, which is convenient for the concentrated air flow at the fitting air hole 9 to blow the warning whistle 10 to emit a sharper warning sound. At the same time, a fitting plug 13 is correspondingly arranged on the back surface of the movable top plate 12, and the fitting plug 13 and the fitting air hole 9 are correspondingly fitted. The fitting plug 13 arranged on the back surface of the movable top plate 12 can facilitate the synchronous control of the opening and closing of the fitting plug 13 to the fitting air hole 9 when the electric push rod 6 controls the opening and closing of the movable top plate 12. When the warning lighting lamp 3 is located inside the installation groove 2, the fitting air hole 9 is in a closed state, and when the warning lighting lamp 3 deflects and disengages from the installation groove 2, the fitting air hole 9 is opened. That is, when the movable top plate 12 ejects the warning lighting lamp 3 for warning lighting, the fitting air hole 9 is opened at the same time, so that the air flow can pass through the warning whistle 10 at the fitting air hole 9 to emit a whistle sound, cooperating to achieve the effect of sound and light alarm.

[0053] Regarding the pop-up removal and replacement part of the cover plate 19:

[0054] Combined with Figure 1-Figure 3As shown, a side slot 18 is provided on the side of the explosion-proof housing 1 for plug-in installation of the detection module, and a sealing cover plate 19 is provided at the outer port of the side slot 18 for structural enclosure. The plug-in installation method provides an optional disassembly and assembly solution for the detection module, and the detection module can be selected and used according to usage scenarios such as dust particulate matter or toxic gas detection. An insertion fixing frame 20 is integrally provided on the inner side of the sealing cover plate 19, and the detection module is arranged inside the insertion fixing frame 20. The sealing cover plate 19 and the insertion fixing frame 20 together form a drawer-type movable disassembly and assembly structure outside the side slot 18. The sealing cover plate 19 and the insertion fixing frame 20 form an integral disassembly and replacement structure, which is convenient for the rapid installation and replacement of the detection module. A sealing gasket 21 is provided at the joint between the insertion fixing frame 20 and the side slot 18, and a fixing bolt 22 is connected between the sealing cover plate 19 and the explosion-proof housing 1. The fixing bolt 22 is used for the disassembly and fixing of the sealing cover plate 19. At the same time, the fitting of the sealing gasket 21 can facilitate the reduction of the edge gap when some detection modules are connected to the detection air duct 8, ensuring stable air flow.

[0055] The content not described in detail in this specification belongs to the prior art well-known to those skilled in the art. Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A multi-hazard sound and light alarm device with a quick disassembly and assembly function, including an explosion-proof housing (1) with a built-in controller and a detection module, characterized in that: An installation groove (2) is opened on the front surface of the explosion-proof housing (1), and a detachable warning lighting lamp (3) is embedded in the installation groove (2); A movable mounting seat (4) for mounting the warning lighting lamp (3) is arranged at the lower end of the installation groove (2), and the movable mounting seat (4) and the installation groove (2) are movably connected by a movable shaft (5); The warning lighting lamp (3) and the movable mounting seat (4) form an outward deflection and detachment structure at the installation groove (2) with the movable shaft (5) as the axis, and an electric ejector rod (6) is installed between the installation groove (2) and the warning lighting lamp (3); A ventilation fan (7) is installed inside the explosion-proof housing (1) for actively ventilating and detecting in cooperation with the detection module, and a detection airway (8) is left between the ventilation fan (7) and the detection module. A fitting air hole (9) is opened on the surface of the installation groove (2) on the side close to the warning lighting lamp (3), and a warning whistle (10) is installed in the fitting air hole (9); When the warning lighting lamp (3) is located inside the installation groove (2), the fitting air hole (9) is in a closed state, and when the warning lighting lamp (3) deflects and detaches from the installation groove (2), the fitting air hole (9) is opened.

2. The multi-disaster type acoustic-optical alarm device with a quick disassembly and assembly function according to claim 1, characterized in that: The overall deflection angle range of the warning lighting lamp (3) and the movable mounting seat (4) with the movable shaft (5) as the axis outside the installation groove (2) is 0-60°, and a limit convex block (11) is arranged on the side of the installation groove (2).

3. The multi-hazard sound and light alarm device with a fast disassembly and assembly function according to claim 2, characterized in that: A movable top plate (12) is arranged between the warning lighting lamp (3) and the installation groove (2), and the lower end of the movable top plate (12) is movably hinged to the installation groove (2); The electric ejector rod (6) is inclined between the movable top plate (12) and the installation groove (2), and the upper and lower ends of the electric ejector rod (6) are respectively movably hinged to the movable top plate (12) and the installation groove (2), and the movable top plate (12) and the warning lighting lamp (3) are pushed out by deflection through the electric ejector rod (6).

4. The multi-hazard sound and light alarm device with a fast disassembly and assembly function according to claim 3, characterized in that: A fitting plug (13) is correspondingly arranged on the back surface of the movable top plate (12), and the fitting plug (13) and the fitting air hole (9) are correspondingly fitted.

5. The multi-hazard sound and light alarm device with a quick disassembly and assembly function according to claim 1, characterized in that: A bayonet power connection slot (14) is opened on the surface of the movable mounting seat (4) for the power connection of the warning lighting lamp (3), and the warning lighting lamp (3) is powered by a built-in battery, and both the warning lighting lamp (3) and the electric ejector rod (6) are connected to the controller to form a control circuit.

6. The multi-hazard sound and light alarm device with a fast disassembly and assembly function according to claim 1, characterized in that: The surfaces of both the warning lighting lamp (3) and the installation groove (2) are streamlined structures, and a limit ear plate (15) is integrally arranged at the top end of the warning lighting lamp (3), and the limit ear plate (15) is attached to the surface of the installation groove (2).

7. A multi-hazard sound and light alarm device with a quick disassembly and assembly function according to claim 1, characterized in that: A ventilation grille (16) is opened on the surface of the explosion-proof housing (1), and an air flow passage is formed among the ventilation grille (16), the ventilation fan (7) and the detection airway (8); A plurality of branch pipes are arranged in the detection airway (8) corresponding to the detection module, and each branch pipe is provided with a corresponding electromagnetic valve (17) to control the opening and closing of the airway.

8. The multi-hazard sound and light alarm device with a fast disassembly and assembly function according to claim 1, characterized in that: A side of the explosion-proof housing (1) is provided with a side slot (18) for plug-in installation of the detection module, and a sealing cover plate (19) is arranged at the outer port of the side slot (18) for structural enclosure.

9. The multi-hazard sound and light alarm device with a quick disassembly and assembly function according to claim 8, characterized in that: An insertion and fixing frame (20) is integrally arranged on the inner side of the sealing cover plate (19), the detection module is arranged inside the insertion and fixing frame (20), and the sealing cover plate (19) and the insertion and fixing frame (20) as a whole form a drawer-type movable disassembly and assembly structure outside the side slot (18).

10. A multi-hazard sound and light alarm device with a fast disassembly and assembly function according to claim 9, characterized in that: A sealing gasket (21) is arranged at the joint between the insertion and fixing frame (20) and the side slot (18), and a fixing bolt (22) is connected between the sealing cover plate (19) and the explosion-proof housing (1).

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