CN217472640U

CN217472640U - Signal feedback device of fire extinguishing system

Info

Publication number: CN217472640U
Application number: CN202220467985.9U
Authority: CN
Inventors: 朱劲武; 周铁祥
Original assignee: Beijing Leader Haixin Gas Fire Extinguishing System Equipment Co ltd
Current assignee: Beijing Leader Haixin Gas Fire Extinguishing System Equipment Co ltd
Priority date: 2022-03-04
Filing date: 2022-03-04
Publication date: 2022-09-23
Anticipated expiration: 2032-03-04

Abstract

The utility model relates to a fire extinguishing system signal feedback device, it includes the joint, with the joint connection pressure trigger switch, cover the casing that establishes outside pressure switch, pass pilot lamp and the electric wire that casing and pressure trigger switch are connected, the joint is connected with the fire-extinguishing apparatus pressure source, pressure trigger switch passes through the through-hole and communicates with the fire-extinguishing apparatus pressure source, form the route of voltage-sharing in the passageway, the pressure control pressure trigger switch's of fire-extinguishing apparatus pressure source closed or off-state, pilot lamp and electric wire all are connected with pressure trigger switch, and pilot lamp and electric wire connection in the casing, and control pilot lamp electricity through the closed or off-state of pressure trigger switch and communicate or not communicate, through the shape of shell, need not install with the help of the instrument manually, it is more convenient to realize the installation; through the indicator light, the alarm can be directly given in the fire extinguishing agent leakage area, and the leakage position can be visually marked; the trigger pressure switch is arranged, so that the device is sensitive, simple, reliable, convenient to install and convenient to replace.

Description

Signal feedback device of fire extinguishing system

Technical Field

The utility model relates to a fire extinguishing systems pressure monitoring technical field, concretely relates to fire extinguishing systems signal feedback device.

Background

Along with fire extinguishing apparatus's rapid development, gaseous fire extinguishing agent is by the wide application, and whether mainly utilize pressure detection or detect specific position gas content to monitor fire extinguishing apparatus and leak, however, in the prior art, only possess signal feedback function to leak signal feedback device in these traditional fire extinguishing apparatus, can't carry out light suggestion when fire extinguishing agent leaks in fire extinguishing apparatus and report to the police, and the installation is complicated, be difficult for changing, so design an installation convenient, simple structure reacts sensitively, thereby can carry out light warning thereby the fire extinguishing apparatus signal feedback device who knows the leakage position fast is a problem waiting for urgent need.

If publication numbers are: CN212817785U, entitled as a pressure monitoring device of a heptafluoropropane fire extinguishing system, discloses a fire extinguishing equipment monitoring device, solves the problem that the leakage of the existing driving gas cylinder solenoid valve can not be effectively detected and the starting and fire extinguishing of the fire extinguishing system is influenced, and comprises a main connecting pipeline, wherein the top of the main connecting pipeline is provided with a communication sealing end, the top of the communication sealing end is provided with a detection triggering end, the top of the detection triggering end is provided with an alarm end, one end of the main connecting pipeline is provided with a sealing electromagnetic signal valve, and one end of the sealing electromagnetic signal valve is connected with an auxiliary connecting pipeline; this heptafluoropropane fire extinguishing systems pressure monitoring device can effectively detect the gas that drives the gas cylinder solenoid valve and leak to and can in time report to the police and inform and make the maintainer repair, thereby ensure the driven validity of drive gas cylinder, also make fire extinguishing systems can effectually start when the conflagration breaing out and put out a fire.

If the publication number is: CN211178898U, the name is heptafluoropropane fire extinguishing apparatus intelligence leak testing system's utility model patent, discloses a fire extinguishing apparatus leak testing system, include: the fire extinguishing agent bottle is provided with a liquid level detection port and is provided with a liquid outlet valve and a pressure reducing device; the power gas bottle is provided with a power gas valve; at least one driving gas bottle provided with a driving gas valve; the gas inlet end of the selection valve is communicated with the driving gas valve, the gas outlet end of the selection valve is communicated with the power gas valve, and the liquid inlet end of the selection valve is communicated with the liquid outlet valve; the liquid level sensor is arranged at the liquid level detection port; the pressure sensors are respectively arranged on the power gas valve and the driving gas valve; a controller; the controller is in communication connection with the cloud server; and the user terminals are respectively in communication connection with the cloud server. The detection system can detect the height of the stored liquid level in real time, stores pressure, displays the pressure condition and the release leakage condition of the fire extinguishing agent bottle on the handheld terminal of a user through the cloud server, realizes real-time point detection, improves safety, and avoids the problem that the fire disaster cannot be put out due to the leakage of the gas bottle.

However, the leakage alarm device is still complex in installation, not easy to replace, and cannot solve the problems that the structure is complex and the leakage alarm signals need to be checked one by one, and the leakage alarm device is provided in view of the above.

SUMMERY OF THE UTILITY MODEL

For solving the technical problem, the utility model discloses a fire extinguishing systems signal feedback device, it includes the joint, establishes casing outside pressure trigger switch, cover with articulate pressure trigger switch, cover, passes the pilot lamp and the electric wire that casing and pressure trigger switch are connected, the body that the through-hole was seted up for being equipped with the external screw thread and following the cylinder axis to the joint, and is connected with the fire extinguishing apparatus pressure source through the external screw thread, pressure trigger switch passes through-hole and fire extinguishing apparatus pressure source intercommunication, forms voltage-sharing route in the passageway, the pressure control pressure trigger switch's of fire extinguishing apparatus pressure source closure or off-state, pilot lamp and electric wire all are connected with pressure trigger switch, and pilot lamp and connection of electric lines in the casing, and the closure or off-state control pilot lamp through pressure trigger switch are electric intercommunication or not the intercommunication.

Furthermore, the casing is cylindrical, and the one end that the joint was kept away from to cylindrical casing is closed terminal surface, and has the boss on the terminal surface, the boss has length extension along the terminal surface radial direction.

Furthermore, the indicator light is arranged on the end face of the boss protruding out of the shell, the electric wire is arranged on the other side of the boss in the length extending direction, the length extending direction of the electric wire is consistent with the protruding direction of the boss, and the electric wire forms a structure capable of being held on the boss and extends towards the direction of the end face of the boss.

Furthermore, there is the edges and corners on the circumference face that connects the one end with pressure trigger switch, forms the structure that can cooperate the centre gripping.

Furthermore, the joint has been seted up the slot along the circumferential direction, is provided with the sealing washer in the slot, and the sealing washer card is in the slot, and the sealing washer forms the structure of blocking that the pressure source circulated with external atmosphere at the gap of hookup location after sealing joint is connected with the fire-extinguishing apparatus pressure source.

Furthermore, the tail end of the wire is provided with a wiring terminal, and the wiring terminal is provided with a fast interface which is respectively connected with the wire, a power supply and an alarm signal monitoring system.

Furthermore, the pressure trigger switch comprises a sealing shell, a trigger contact, a passage elastic sheet, a trigger ejector rod and an elastic pressing sheet, wherein one end of the passage elastic sheet is fixedly connected with the trigger contact, the other end of the passage elastic sheet is fixed in the sealing shell, one end of the trigger ejector rod is in contact with or not in contact with the passage elastic sheet, the other end of the elastic pressing sheet is fixedly connected with the other end of the trigger ejector rod, the edge of the elastic pressing sheet is fixedly connected with the inner surface of the sealing shell, the inside of the sealing shell is divided into two parts, one part of the space is communicated with the through hole, the other part of the space forms a containing space for containing the trigger contact, the passage elastic sheet and the trigger ejector rod, the convex arc surface faces to the space communicated with the through hole, the radian of the arc surface of the elastic pressing sheet is controlled by the internal pressure of the fire extinguishing equipment, the trigger ejector rod is driven by the elastic pressing sheet to move close to or far away from the passage elastic sheet, the trigger contact or far away from the trigger contact is driven by the trigger contact, and the conduction or non-conduction of the circuit is realized.

Further, pressure trigger switch still include with the two elastic pressing piece of elastic pressing piece rigid coupling and with the screens board of two butts of elastic pressing piece, two elastic pressing piece shape the same, and with the opposite lock setting of elastic pressing piece, form the structure that the cross-section is the fusiformis, screens board rigid coupling is in sealed shell, and the shape is the same with sealed shell cross section, and screens board and two centers of elastic pressing piece are provided with the through hole, trigger the ejector pin and pass the through hole of two elastic pressing piece and screens board, and form clearance fit with two elastic pressing piece and screens board.

Furthermore, the device also comprises a resistor which is connected in series with a circuit for connecting the indicator light and the electric wire.

Preferably, the housing is made of an insulating material.

Advantageous effects

Through the shape of the shell, the installation is more convenient and quick without the help of related tools; by arranging the indicating lamp, the alarm can be directly given in a leakage area after the fire extinguishing equipment leaks, and the leakage position can be visually displayed; through the trigger pressure switch inside, realize the simple and reliable alarm system sensitive to pressure variation to be convenient for install, it is convenient to change.

Drawings

FIG. 1 is a schematic structural diagram of a signal feedback device of a fire extinguishing system according to the present invention;

fig. 2 is a second schematic structural view of the signal feedback device of the fire extinguishing system of the present invention;

fig. 3 is a sectional view of the signal feedback device of the fire extinguishing system of the present invention.

Legend: 1. a joint; 11. a through hole; 12. a trench; 2. a pressure trigger switch; 21. sealing the shell; 22. a trigger contact; 23. a passage spring plate; 24. triggering the ejector rod; 25. elastic tabletting; 26. a second elastic pressing sheet; 27. a clamping plate; 3. a housing; 31. a boss; 4. an indicator light; 5. an electric wire; 6. a wiring terminal; 7. and (4) resistance.

Detailed Description

The present invention is further illustrated by the following examples, but is not limited to the contents of the specification.

The utility model relates to a signal feedback device of a fire extinguishing system, which comprises a joint 1, a pressure trigger switch 2 connected with the joint, a shell 3 covered outside the pressure switch 2, an indicator lamp 4 and an electric wire 5 which pass through the shell 3 and are connected with the pressure trigger switch, wherein the joint 1 is a pipe body provided with external threads and provided with a through hole 11 along the axis of a cylinder, and is connected with a pressure source of fire extinguishing equipment through the external threads, the pressure trigger switch 2 is communicated with the pressure source of fire extinguishing equipment through the through hole 11 to form a passage with pressure equalization in the passage, the pressure of the pressure source of fire extinguishing equipment controls the on or off state of the pressure trigger switch 2, the indicator lamp 4 and the electric wire 5 are both connected with the pressure trigger switch 2, the indicator lamp 4 is electrically communicated with the electric wire 5 in the shell 3, and the indicator lamp 4 is controlled or not communicated through the on or off state of the pressure trigger switch 2, and is communicated with the pressure source of fire extinguishing equipment through the joint 1, if fire extinguishing agent in the fire extinguishing apparatus leaks, lead to fire extinguishing apparatus internal pressure to diminish, can make pressure trigger switch 2 closed, make the electric wire 5 of connecting the power and the complete closed route of indicator 4 formation, thereby make indicator 4 light and report to the police, can feed back the alarm signal of fire extinguishing apparatus leakage to alarm monitoring system through external conductor simultaneously, thereby inform the staff's of maintenance inspection maintenance fire extinguishing apparatus, light signal can make the maintainer find the leakage region fast simultaneously, accelerate maintenance efficiency, and is concrete, pressure trigger switch 2 is bellows type pressure switch.

For the convenience of installation, the shell 3 is cylindrical, one end of the cylindrical shell, which is far away from the joint 1, is a closed end face, the end face is provided with a boss 31, the boss 31 has a length extension along the radial direction of the end face, the straight line of the length direction of the boss 31 passes through the circle center of the circular end face, when the shell 3 of the cylindrical main body is installed, the shell is convenient to rotate by using fingers, and an installation worker can quickly buckle the external thread on the joint 1 and the internal thread on the position to be installed and enable the fire extinguishing system signal feedback device to be fixed in position, and the boss 31 on the end face can further tighten the fire extinguishing system signal feedback device at the installation position when force needs to be applied, so that a bar-shaped structure with a certain thickness is more convenient for applying force when being tightened compared with a cylinder; specifically, the length of the boss 31 is preferably equal to the diameter of the circular end face, and can be slightly longer or shorter, so that a force can be better applied when screwing, the height of the boss 31 protruding out of the end face is 0.8-1.2cm, and when the height is within the range, the boss is more beneficial to being pinched by fingers and rotated; the thickness perpendicular to the length direction is 0.4-0.6cm, and in this range, the boss 31 does not break during the process of force application and screwing.

The indicator light 4 is arranged on the end face of the boss 31 protruding out of the housing part, and on one side of the boss 31 in the length extension direction, the electric wire 5 is arranged on the other side of the boss 31 in the length extension direction, the length extension direction of the electric wire 5 is consistent with the projection direction of the boss 31, the electric wire 5 forms a structure capable of being held on the boss 31 and extends towards the direction of the end face of the boss 31, through the arrangement mode, the electric wire can be clenched in the hand when being installed, the thumb and the forefinger are used for rotating installation, the risk that the electric wire can fall off after sliding and buckling during installation is prevented, simultaneously when screwing up the application of force, compare in only screwing up the application of force with thumb and forefinger, the three fingers can also be better with the electric wire clenching in palm of the hand in addition, with the more tight fixing in mounted position of this device, sealed effect is better, prevents to take place because do not screw up and produce the problem that fire extinguishing apparatus leaked.

Connect 1 and pressure trigger switch 2 and be connected the circumferential surface of one end and have the edges and corners on, form the structure that can cooperate the centre gripping, in order to guarantee this device when needs are changed, probably there is screw thread lock time ageing problem appear for a long time, and the strength of staff can't take off its unscrewing, sets up the one end of nut form through connecting 1, can twist here and take off after its unscrewing with the help of instruments such as spanners. And meanwhile, the screw can be used for further screwing when being installed.

The groove 12 has been seted up along the circumferential direction to joint 1, be provided with the sealing washer in the groove 12, the sealing washer card is in groove 12, the sealing washer forms the structure of blocking of pressure source and external atmosphere circulation at the gap of hookup location after sealing joint 1 is connected with the fire-extinguishing apparatus pressure source, concretely, the joint 1 bottom surface can set up to the conical surface, can be more convenient for when the installation with the internal thread lock of mounted position, and joint 1 and mounted position are hard seal, hard seal guarantees by the influence of factors such as temperature, pressure, make the combination position after the installation of this device and fire-extinguishing apparatus more reliable, it can solve the relatively soft sealed relatively poor drawback of sealed effect of hard seal to increase the sealing washer, and increase the groove can the fixed seal circle position, take place the removal when preventing the sealing washer from installing, lead to sealed poor the production of effect and leak.

The terminal of the wire 5 is provided with a wiring terminal 6, the wiring terminal 6 is provided with a fast interface respectively connected with the wire 5, the power supply and the alarm signal monitoring system, the wiring terminal 6 is arranged to be capable of being installed, the wire 5 is more conveniently connected with the power supply and the wire of the monitoring alarm control system, and the assembly and disassembly are simple and rapid.

The pressure trigger switch 2 comprises a sealing shell 21, a trigger contact 22, a passage elastic sheet 23 with one end fixedly connected with the trigger contact 22 and the other end fixed in the sealing shell 21, a trigger push rod 24 with one end in contact with or not in contact with the passage elastic sheet 23, an elastic pressing sheet 25 fixedly connected with the other end of the trigger push rod 24 and fixedly connected with the sealing shell 21, wherein the elastic pressing sheet 25 is an arc surface, the edge of the elastic pressing sheet is fixedly connected with the inner surface of the sealing shell 21, the inner part of the sealing shell 21 is divided into two parts, one part of the space is communicated with the through hole 11, the other part of the space forms a containing space for containing the trigger contact 22, the passage elastic sheet 23 and the trigger push rod 24, the convex arc surface of the elastic pressing sheet 25 is controlled by the internal pressure of the fire extinguishing equipment, the trigger push rod 24 is driven by the elastic pressing sheet 25 to move close to or far away from the passage elastic sheet 23 and drives the trigger contact 22 to realize contact or far away, the circuit is conducted or not conducted, when in work, the pressure of the fire extinguishing equipment is normal, because the fire extinguishing equipment is communicated with the interior of the fire extinguishing equipment through the through hole 11, the cambered surface of the elastic pressing sheet 25 enables the elastic pressing sheet 25 to have elasticity, the internal pressure acts on the elastic pressing sheet 25, the curvature of the cambered surface of the elastic pressing sheet 25 is reduced, so that the trigger ejector rod 24 which is positioned at the concave surface of the elastic pressing sheet 25 and is fixedly connected with the elastic pressing sheet 25 is contacted with the channel elastic sheet 23, the channel elastic sheet 23 is made of conductive metal, specifically conductive materials such as iron or copper, the channel elastic sheet 23 is in a deformation state when being jacked up by the trigger ejector rod 24 and is in a curved state, the trigger contacts 22 are respectively positioned on two surfaces facing each other of the 2 channel elastic sheets 23, and the trigger contacts 22 are made of conductive materials, at the moment, the two trigger contacts 22 are not contacted, the circuit is in a disconnected state, an alarm signal cannot be triggered, and when the fire extinguishing equipment leaks, the internal pressure of fire extinguishing apparatus also can diminish thereupon, elastic pressing piece 25 can diminish because the pressure exerted this moment, the crookedness of its cambered surface resumes to initial condition, in the in-process that elastic pressing piece 25 resumes initial condition gradually, trigger ejector pin 24 also from changing route shell fragment 23 jack-up to with route shell fragment 23 contactless, route shell fragment 23 resumes to initial straight state from the curved shape by the jack-up, trigger contact 22 can contact each other this moment, make the circuit that power and pilot lamp 4 formed switch on, pilot lamp 4 gets electric and begins luminous the warning, and the signal of telecommunication that produces after forming the route can be conveyed to monitoring alarm control system by the wire, produce alarm signal and inform relevant staff, this device accomplishes alarm work after the fire extinguishing apparatus leaks.

The pressure trigger switch 2 further comprises an elastic pressing sheet II 26 fixedly connected with the elastic pressing sheet 25 and a clamping plate 27 abutted against the elastic pressing sheet II 26, the shape of the elastic pressing sheet II 26 is the same as that of the elastic pressing sheet 25, the elastic pressing sheet II 26 is opposite to that of the elastic pressing sheet 25 and is arranged in a buckling manner to form a structure with a fusiform section, the clamping plate 27 is fixedly connected in the sealing shell 21 and has the same shape as that of the cross section of the sealing shell, a through hole is formed in the center of the clamping plate 27 and the elastic pressing sheet II 26, the trigger ejector rod 24 penetrates through the through holes of the elastic pressing sheet II 26 and the clamping plate 27 and forms clearance fit with the elastic pressing sheet II 26 and the clamping plate 27, the clamping plate 27 is fixed in the sealing shell 21 and can abut against the elastic pressing sheet II 26 and the elastic pressing sheet 25 to prevent movement, and the two elastic pressing sheets arranged in the buckling manner have better recovery performance when applied pressure is reduced compared with a single elastic pressing sheet arranged independently, the reaction to the pressure change is more sensitive, the trigger ejector rod 24 which forms clearance fit with the second elastic pressing piece 26 and the clamping plate 27 can move in the direction perpendicular to the clamping plate 27, the position of the jacking passage elastic piece 23 is fixed under the normal condition, and the stable effect of the device in use is ensured.

The circuit also comprises a resistor 7, wherein the resistor 7 is connected in series with a circuit for connecting the indicator lamp 4 and the electric wire 5, the resistor plays a role of converting the working voltage of the indicator lamp to enable the indicator lamp to be matched with the external input voltage, a fixed value resistor is used, matching is carried out according to needs, and a conventional resistor sold in the market can be used; specifically, the indicator light 4 is a light emitting diode, and the indicator light 4 is a monochromatic light emitting diode emitting yellow light, such as F5-3VDC, which is not only easy to maintain but also has the function of obvious warning effect in alarm.

The shell 3 is made of insulating materials such as engineering plastics, is low in manufacturing cost and has certain hardness, the structural strength of the boss 31 can be guaranteed when the shell is screwed down, protection can be provided, the service life is prolonged, and the insulating performance can prevent circuit faults caused by conduction of the shell 3 from causing false alarm of leakage conditions.

It is to be understood that the above-described embodiments of the present invention are merely examples provided for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. Not all embodiments are exhaustive. All obvious changes or variations led out by the technical scheme of the utility model are still in the protection scope of the utility model.

Claims

1. A fire extinguishing system signal feedback device is characterized in that: the pressure control device comprises a connector (1), a pressure trigger switch (2) connected with the connector, a shell (3) covered outside the pressure trigger switch (2), an indicator light (4) and an electric wire (5) which penetrate through the shell (3) and are connected with the pressure trigger switch, wherein the connector (1) is a pipe body provided with external threads and provided with a through hole (11) along the axis of a cylinder, and is connected with a fire extinguishing equipment pressure source through the external threads, the pressure trigger switch (2) is communicated with the fire extinguishing equipment pressure source through the through hole (11) to form a pressure-equalizing passage in a passage, the pressure of the fire extinguishing equipment pressure source controls the on or off state of the pressure trigger switch (2), the indicator light (4) and the electric wire (5) are both connected with the pressure trigger switch (2), the indicator light (4) is connected with the electric wire (5) in the shell (3), and controls the electric connection or disconnection of the indicator light through the on or off state of the pressure trigger switch (2), casing (3) are cylindrical, and the one end that cylindrical casing kept away from joint (1) is the closed end face, and has boss (31) on the terminal surface, boss (31) have length extension along the terminal surface radial direction.

2. A fire suppression system signal feedback arrangement as claimed in claim 1, wherein: the indicator lamp (4) is arranged on the end face of the boss (31) protruding out of the shell, the electric wire (5) is arranged on the other side of the boss (31) in the length extending direction, the length extending direction of the electric wire (5) is consistent with the protruding direction of the boss (31), and the electric wire (5) forms a structure capable of being held on the boss (31) and extends towards the direction of the end face of the boss (31).

3. A fire suppression system signal feedback device as claimed in claim 1, wherein: the circumferential surface of one end, connected with the pressure trigger switch (2), of the joint (1) is provided with a corner angle, so that a structure capable of being clamped in a matched mode is formed.

4. A fire suppression system signal feedback arrangement as claimed in claim 1, wherein: the joint (1) is provided with a groove (12) along the circumferential direction, a sealing ring is arranged in the groove (12) and clamped in the groove (12), and the sealing ring forms a blocking structure for the pressure source to circulate with the external atmosphere at a gap at a connecting position after the sealing joint (1) is connected with the pressure source of the fire extinguishing equipment.

5. A fire suppression system signal feedback device as claimed in claim 1, wherein: the terminal of electric wire (5) is equipped with binding post (6), binding post (6) are last to have the fast interface of being connected with electric wire (5), power and alarm signal monitoring system respectively.

6. A fire suppression system signal feedback device as claimed in claim 1, wherein: the pressure trigger switch (2) comprises a sealing shell (21), a trigger contact (22), a passage elastic sheet (23) with one end fixedly connected with the other end of the trigger contact (22) and the other end fixed in the sealing shell (21), a trigger push rod (24) with one end in contact with or not in contact with the passage elastic sheet (23), and an elastic pressing sheet (25) fixedly connected with the other end of the trigger push rod (24), wherein the elastic pressing sheet (25) is a cambered surface, the edge of the elastic pressing sheet is fixedly connected with the inner surface of the sealing shell (21), the inside of the sealing shell (21) is divided into two parts, one part of the space is communicated with the through hole (11), the other part of the space forms a containing space for containing the trigger contact (22), the passage elastic sheet (23) and the trigger push rod (24), the convex cambered surface faces the space communicated with the through hole (11), the cambered surface of the elastic pressing sheet (25) is controlled by the pressure in the fire extinguishing equipment, the trigger push rod (24) is driven by the elastic pressing sheet (25) to move close to or far away from the passage elastic sheet (23), and the trigger contact (22) is driven to realize contact or separation, and the conduction or non-conduction of the circuit is realized.

7. The fire suppression system signal feedback device of claim 6, wherein: pressure trigger switch (2) still include with two (26) of the elastic pressing piece of elastic pressing piece (25) rigid coupling and with screens board (27) of two (26) butts of elastic pressing piece, two (26) of elastic pressing piece are the same with elastic pressing piece (25) shape, and set up with elastic pressing piece (25) opposite and lock, form the structure that the cross-section is fusiformis, screens board (27) rigid coupling is in sealed shell (21), and the shape is the same with sealed shell cross section, and screens board (27) and two (26) centers of elastic pressing piece are provided with the through hole, trigger ejector pin (24) pass the through hole of two (26) of elastic pressing piece and screens board (27), and form clearance fit with two (26) of elastic pressing piece and screens board (27).

8. A fire suppression system signal feedback device as claimed in claim 1, wherein: the LED lamp also comprises a resistor (7), wherein the resistor (7) is connected in series with a circuit for connecting the indicator lamp (4) and the electric wire (5).

9. A fire suppression system signal feedback arrangement according to any one of claims 1-8, wherein: the shell (3) is made of insulating materials.