CN210168310U - Fire-fighting pressure switch adopting discrete LED lamp combination - Google Patents

Abstract

The utility model provides an adopt fire control pressure switch of discrete LED lamp combination which characterized in that, replaces its inside digital display screen through the longer emitting diode of life, when practicing thrift electric power, can also reach waterproof dirt-proof effect, include: a circuit board for loading electronic components; a housing disposed outside the circuit board to protect the circuit board; and the connecting pipe is arranged below the shell and is used for being connected with a pipeline. The fire control pressure switch adopting the discrete LED lamp combination has the advantages that the digital display screen is replaced by the LED lamp with long service life, so that the fire control pressure switch can run for a longer time, and meanwhile, the LED lamp has excellent dustproof and waterproof performance, so that the LED lamp cannot be affected by the environment to break down or influence the display during working, and the service efficiency of the fire control pressure switch is improved.

Description

Fire-fighting pressure switch adopting discrete LED lamp combination

Technical Field

The utility model relates to a pipeline under pressure control protection technical field especially relates to an adopt fire control pressure switch of discrete LED lamp combination.

Background

The pressure switch adopts a pressure sensor and a transmitting circuit with high precision and high stability, and then realizes the detection, display, alarm and control signal output of medium pressure signals through a special CPU modular signal processing technology. The pressure gauge can be widely used for measuring and controlling the gauge pressure and the absolute pressure of various gases and liquids in the fields of petroleum, chemical industry, metallurgy, electric power, water supply and the like, and is an ideal intelligent measuring and controlling instrument for industrial fields.

The pressure switch is mainly applied to industrial equipment such as power plants, petrochemical industry, metallurgical industry and the like to output alarm or control signals, and has important application in the industrial field. Can prevent the damage of important devices in production engineering and avoid major production accidents.

The pressure switch is a main component in the fire sprinkler system and is arranged in a wet alarm valve of the fire sprinkler system. When the pressure in the fire-fighting spray pipeline is smaller than the pressure of the water supply end, the pressure switch can automatically act, and an action signal is fed back to the automatic backfire disaster alarm system host. The control host computer receives the signal and starts the fire-fighting spraying pump to pressurize.

Pressure switch among the prior art uses digital display screen mostly, under long-time operation, can lead to power consumption too much, simultaneously, and digital display screen can't waterproof dustproof, when monitoring water pressure, receives the drop of water that splashes very easily and leads to the display screen to break down, can be simultaneously because the dust overstocks too much and can't see the accurate numerical value on the display screen clearly.

Chinese patent publication No.: CN204790444U discloses an intelligent electronic pressure switch, which comprises a shell, wherein a display screen and functional keys are arranged on the outer surface of the shell; the bottom end of the shell is provided with a pressure sensor; a signal acquisition module, a signal conversion module, a controller, an alarm module and a switch module are arranged in the shell; the pressure sensor is connected with the signal acquisition module; the controller is respectively connected with the signal conversion module, the alarm module, the switch module, the display screen and the function keys. It can be seen that the pressure switch has the following problems:

first, the pressure switch adopts the touch-sensitive screen system, though can be more simple and convenient when the operation, nevertheless the power consumption of whole pressure switch also can promote simultaneously, and the running cost is high.

Second, pressure switch can't accomplish dustproof and waterproof, contacts the drop of water that splashes easily and leads to the circuit to take place the short circuit in long-time operation, simultaneously, because can influence the operating accuracy of display screen after the too much dust of stack on the display screen, the figure on the display screen also can be because the dust can't show concrete figure simultaneously, and operating efficiency is low.

SUMMERY OF THE UTILITY MODEL

Therefore, the utility model provides an adopt fire control pressure switch of discrete LED lamp combination for overcome among the prior art because the unable dustproof and waterproof problem that leads to pressure switch availability factor low of display screen.

In order to achieve the above object, the utility model provides an adopt fire control pressure switch of discrete LED lamp combination, its longer LED lamp through life replaces its inside digital display screen as the pilot lamp, when practicing thrift electric power, can also reach waterproof dirt-proof effect, include:

a circuit board for loading electronic components;

a housing disposed outside the circuit board to protect the circuit board;

the connecting pipe is arranged below the shell and is used for being connected with a pipeline to be tested.

Further, the circuit board is double-deck plate structure, and two plates are placed side by side, include: a display panel for loading buttons and indicator lamps; the capacitor relay board is arranged behind the display board and used for loading a capacitor, a relay and a binding post; a connecting element disposed at the gap between the display panel and the capacitor relay panel for connecting the display panel and the capacitor relay panel

Further, the indicator light is an LED light which is arranged on the upper part of the outer side of the display panel and used for emitting light; the buttons are uniformly arranged on the lower side of the indicator light and used for controlling the fire-fighting pressure switch.

Furthermore, the capacitors and the relays in the capacitor relay board are uniformly arranged on one side, close to the display board, of the capacitor relay board; the binding post is arranged on one side of the capacitor relay board far away from the display board and is used for being connected with the power line and the output line.

Further, electric wire is equipped with in electric capacity relay board bottom, the electric wire is connected with pressure sensor, and when the water pressure that pressure sensor surveyed was too high or crossed low, electric capacity relay board can cut off the water pressure in order to control the pipeline that awaits measuring in the return circuit between power cord and the output line.

Further, the housing includes: a cylindrical housing having an opening at one side; the control panel is arranged on the closed side of the shell and used for controlling the fire-fighting pressure switch; and a protective cover disposed on the opening side of the housing for protecting the circuit board from damage.

Furthermore, the surface of the shell is provided with through holes with different shapes, the through holes respectively correspond to the indicator lights and the buttons on the display panel and are used for being matched with the control panel to enable the light of the display panel to penetrate through the shell and enable the buttons on the display panel to be in contact with the control panel.

Further, the control panel includes: the display screen is used for displaying the brightness of the indicating lamp of the display panel, and the display screen is matched with the through hole of the shell so that the brightness is projected on the display screen in a digital form; the state indicating hole is arranged below the display screen and used for displaying the brightness of the indicating lamp of the display panel; at least four button protection films uniformly disposed under the state indicating holes and contacting the buttons in the display panel to seal the buttons.

Further, the status indication holes are matched with the through holes of the shell, so that light is irradiated on the different status indication holes in a light spot mode, status names are written below the status indication holes, and the specific status of the fire fighting pressure switch is informed to a user by lighting the different status indication holes.

Furthermore, the surface of the button protective film is provided with icons, corresponding descriptions are written below the icon protective film respectively, and a user can press the specified button protective film according to the icons and the descriptions, and the button protective film extrudes the button to complete specified operation on the fire switch.

Compared with the prior art, the beneficial effects of the utility model reside in that, the fire control pressure switch who adopts discrete LED lamp combination passes through long service life's LED lamp replacement digital display screen, makes fire control pressure switch can operate longer time, simultaneously because LED lamps and lanterns have excellent dustproof and waterproof performance, like this the LED lamp can not receive the environmental impact at the during operation and breaks down or influence the demonstration, has improved fire control pressure switch's availability factor.

Furthermore, the circuit board adopts a double-layer structure, and the occupied space of the circuit board in the fire-fighting pressure switch is saved while the circuit board is ensured to reach a specified working state.

Furthermore, the display panel is provided with indicating lamps which are arranged in a designated sequence, and after the water pressure is calculated, the obtained parameters are displayed in a digital form through different flashing modes of the indicating lamps, so that a worker can visually observe the water pressure. Meanwhile, when the pressure switch is set, visual numbers can be converted into specific limiting values, and the service efficiency of the fire-fighting pressure switch is improved.

Furthermore, circuit elements such as a capacitor, a resistor and a relay are arranged on the circuit board, so that the fire-fighting switch can stably operate, and the service efficiency of the fire-fighting pressure switch is further improved.

Further, be equipped with the through-hole on the visor, when the visor was covered, the terminal can expose, like this, when changing the electric wire, need not the touch circuit board and can change the electric wire, further improved the speed of fire control pressure switch replacement epilepsy.

Furthermore, simple icons are arranged on the button protective film on the control panel, and corresponding descriptions are arranged below the buttons, so that the fire-fighting pressure switch can be quickly and accurately operated when being used, and the service efficiency of the fire-fighting pressure switch is further improved.

Drawings

FIG. 1 is a schematic structural view of a fire-fighting pressure switch using a discrete LED lamp combination according to the present invention;

fig. 2 is a schematic structural diagram of the circuit board of the present invention;

fig. 3 is a schematic structural view of the back side of the circuit board according to the present invention;

FIG. 4 is a schematic structural view of the housing of the present invention

Fig. 5 is a schematic structural diagram of the control panel of the present invention;

fig. 6 is a schematic structural view of the first protective cover of the present invention;

fig. 7 is a schematic structural diagram of the second protective cover of the present invention.

Detailed Description

The above and further features and advantages of the present invention will be described in more detail below with reference to the accompanying drawings.

Preferred embodiments of the present invention will be described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are only for explaining the technical principle of the present invention, and do not limit the scope of the present invention.

It should be noted that in the description of the present invention, the terms of direction or positional relationship indicated by the terms "upper", "lower", "left", "right", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, which are only for convenience of description, and do not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

Furthermore, it should be noted that, in the description of the present invention, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

Fig. 1 is a schematic structural diagram of a fire switch using binding posts according to the present invention, which includes a circuit board 1 (not shown), a housing 2 and a connecting tube 3; the circuit board 1 is arranged inside the shell 2 to enable the fire switch to work normally, and the shell 2 is coated outside the circuit board 1 to protect the circuit board 1 from being damaged by the outside and adjust a preset pressure value in the circuit board; the connecting pipe 3 is arranged below the shell 2 and used for connecting the fire-fighting pressure switch to a specified pipeline. When the fire switch is used, the shell 2 is used for adjusting the preset value in the circuit board 1, and the fire switch can start to operate after the adjustment is completed; when fluid passes through the pipeline, the water pressure of the fluid passes through the pressure sensor, the pressure sensor can transmit the measured water pressure to the circuit board 1 through the connecting pipe 3 through an electric wire, the circuit board 1 can compare the measured water pressure with a preset value after receiving data, if the measured water pressure is too high or too low, the circuit board 1 can cut off a power supply connected behind the circuit board, a gate in the pipeline is controlled to perform corresponding action so that the water pressure is increased or reduced to a specified range, at the moment, the power supply resets, a valve in the pipeline stops acting, and the fluid starts to flow again. It can be understood that the fire control pressure switch not only can be used for measuring and monitoring the fluid pressure, but also can be used for measuring the pressure of gas or other substances, as long as satisfy the fire control pressure switch can reach its appointed operating condition can.

Particularly, connecting pipe 3 is for taking the screwed tubular metal resonator and the screw thread top is the hexagon prism again, and it sets up 2 below of shell for couple together fire control pressure switch and the pipeline that awaits measuring, the inside electric wire that is equipped with of connecting pipe 3 is used for being connected pressure sensor in the pipeline with circuit board 1. When the fire-fighting pressure switch is installed, the connecting pipe 3 is aligned with a connecting port of a pipeline to be measured, the hexagonal prism is clamped by the clamp after the connecting pipe 3 is aligned with the connecting port of the pipeline to be measured, and the clamp starts to rotate, so that the threaded part of the connecting pipe 3 is screwed into the connecting port, and the fire-fighting pressure switch is connected. It is understood that the material of the connecting tube 3 may be iron, stainless steel or other kinds of metal or alloy, as long as the connecting tube 3 can be stably connected with the connecting port of the pipe to be tested.

Please refer to fig. 2, which is a schematic structural diagram of the circuit board 1 of the present invention, including a display panel 11 and a capacitor relay board 12, wherein the display panel 11 is disposed in front of the circuit board 1 and contacts with the housing 2 for connecting with the wires of the pressure sensor, controlling the circuit board and displaying data, and the capacitor relay board 12 is disposed at the rear side of the display panel 11 for connecting with the power line and controlling the operation of the valve in the pipeline.

As shown in fig. 2, the display panel includes an indicator 111, a button 112 and a connecting element 113, wherein the indicator 111 is disposed on an upper portion of the front surface of the display panel 11 for illuminating in a fixed sequence to display pressure values in a digital manner; the button 112 is arranged below the indicator lamp 111 and used for adjusting a preset pressure value in the circuit board 1; the connection members 113 are two metal connectors provided at a rear upper portion of the display panel 11 to connect the display panel 11 with the capacitive relay plate 12.

Specifically, the indicator lamps 111 are a plurality of small LED lamp tubes, which are uniformly arranged on the surface of the display panel 11 and arranged in the shape of a number, and display the designated number according to the setting value, and at least four separate indicator lamps are further arranged below the indicator lamps 111 in the shape of a number to indicate the state of the fire-fighting pressure switch; when the fire fighting pressure switch is set, the indicator light can show the set numerical value in the form of specific numbers, and along with the adjustment of the preset value, the indicator light 111 can correspondingly change to display the adjusted numerical value. It is understood that the indicator 111 may be an LED, or other types of lamps, as long as the indicator 111 can convert the preset pressure value into a specific number.

Specifically speaking, button 112 evenly sets up pilot lamp 111 below for the adjustment fire control pressure switch's default pressure value, wherein the circuit that every button 112 is connected is all inequality, in order to play different effects, when setting up fire control pressure switch, only need according to the demand press appointed button 112 can. It is understood that the kind of the button 112 is not particularly limited in this embodiment, as long as the corresponding operation can be achieved by pressing the designated button 112.

As shown in fig. 2, the capacitor relay board 12 of the present invention is disposed behind the display board 11, and is connected to a power line, and controls the opening and closing of the power line to control the valve action in the pipeline, including the capacitor 121, the relay 122 and the terminal 123; the capacitor 121 and the relay 122 are uniformly distributed on one side of the capacitor relay board 12 adjacent to the display board 11 to provide a stable circuit environment for the circuit board; the terminal post 123 is disposed at the upper rear side of the capacitor relay board 12 for connection with the power line. When the pressure in the pipeline is too high or too low, the capacitor relay board 12 controls an element in the circuit board to cut off a loop of a power line, so as to control the action of a valve in the pipeline, so that the water pressure in the pipeline returns to a specified value, after the return is completed, the loop is closed, the valve stops acting, and the fluid in the pipeline continues to flow.

Please refer to fig. 3, which is a schematic structural diagram of the back of the capacitor relay board 12 according to the present invention, wherein the terminals 123 are at least two terminals, which are uniformly disposed on the upper portion of the back of the capacitor relay board 12 for connecting with the power line, each terminal is provided with two connection points, the connection points are provided with screws, the power line is pressed tightly in a rotating manner, and a partition board is disposed between the connection points for separating the power line, so as to ensure that the fire pressure switch is short-circuited. It is understood that the spacer in the terminal post 123 may be made of polyethylene, polypropylene or other insulating materials, as long as the spacer can separate the power lines and prevent short circuit caused by contact between the power lines.

Shell 2 includes casing 21, control panel 22 and visor, wherein, control panel 22 sets up casing 21's surface for the bright conversion that sends in to casing 21 becomes concrete information, the visor sets up casing 21 rear is used for protecting casing 21 internal circuit board 1.

Please refer to fig. 4, which is a schematic structural diagram of the housing 21 of the present invention, including an indication hole 211 and a button hole 212, wherein the indication hole 211 is disposed on an upper portion of a surface of the housing 21 and a position thereof corresponds to a position of the indication lamp 111, so as to transmit light of the indication lamp 111 through the housing 21 and project the light onto the control panel 22; the button hole 212 is disposed below the indication hole 211 and at a position corresponding to the button 112, so that the button 112 passes through the housing 21 and contacts the control panel 22.

Specifically, the indicating holes 211 are a plurality of through holes, and include a number indicating hole arranged according to numbers and a status indicating hole located below the number indicating hole, and the positions of the number indicating hole and the status indicating hole correspond to the position of the indicating lamp 111, so that light can pass through the shell 21 and be projected onto the control panel 22, when the fire fighting pressure switch is set, the indicating lamp 111 can emit light according to a specified sequence after being set, and the light can penetrate through the indicating hole 211 and be projected onto the control panel to show a specific number or status. It is understood that the shape of the indication hole 211 may be a circle, a rectangle, a trapezoid, or other kinds of shapes as long as the indication hole 211 can allow light to pass through the housing 21 and be projected to the control panel 22.

Specifically, the button hole 212 is at least four circular through holes disposed below the indication hole 211 to allow the button 112 to pass through the housing 21 and contact the control panel 22, and when the fire pressure switch is disposed, the button 112 can be directly controlled through the control panel 22. It is understood that the button hole 212 may be circular, square or other types of shapes, as long as the button hole is sufficient to allow the button 112 to pass through the housing 21 and contact the control panel 22.

Please refer to fig. 5, which is a schematic structural diagram of the control panel 22 according to the present invention, the control panel is a film disposed on the surface of the housing 21 for explaining the brightness information on the surface of the housing 21 and explaining the specific functions of the buttons 112, and includes a display screen 221, a status indication hole 222 and a button protection film 223. Wherein, the display screen 221 is arranged on the upper part of the control panel 22 and is used for projecting the light emitted by the indicator lamp 111 so as to express the set value in the form of number; the status indication hole 222 is disposed below the display screen 221 to display the status of the fire fighting pressure switch, and the button protection film 223 is disposed below the status indication hole 222 to isolate the button from the outside. When the fire fighting pressure switch is set, the designated button protective film 223 is pressed first to be in contact with the button 112 and enable the button 112 to be pressed, the fire fighting pressure switch is switched to a designated state, after the fire fighting pressure switch is switched to the designated state, the state indicating hole 222 can emit light to prompt the specific state of the fire fighting pressure switch, after the fire fighting pressure switch is switched to the designated state, the designated button protective film 223 is continuously pressed to adjust the set pressure value of the fire fighting pressure switch, the adjusted specific pressure value can be represented on the display screen 221 through specific numbers, after the setting is completed, the designated button protective film is continuously pressed, fluid in a pipeline starts to flow, and the fire fighting pressure switch starts to monitor the pipeline. It is understood that the material of the control panel 22 is not limited in this embodiment, as long as the control panel can interpret the light information on the surface of the housing 21 and the specific functions of the buttons 112.

Particularly, the display screen 221 is a rectangular black display panel, which is disposed above the control panel and corresponding to the position of the indicator 111 for projecting the light emitted from the indicator 111. When setting up the extinction pressure switch, pilot lamp 111 can be according to the specific numerical value of setting and regular light, and the light after lighting can see through casing 21 and throw to the display screen 221 on to show specific figure on display screen 221, so that operating personnel can the intuitionally observe the specific pressure numerical value of setting. It is understood that the size of the display screen 221 is not limited in this embodiment, as long as the display screen 221 can project all the light emitted from the indicator 111.

Particularly, status indication hole 222 is the circular port of at least three light-permeable, and it sets up display screen 221 below and with the position of pilot lamp 111 is corresponding, is used for showing the state that fire control pressure switch is located. When the fire-fighting pressure switch is in a certain state, a specified bulb in the indicator lamp 111 is lighted up and penetrates through the shell 21 through the indicating hole 211 to be projected onto a specified state indicating hole 222, when the state of the fire-fighting pressure switch is changed, a corresponding bulb in the indicator lamp 111 is lighted up, and the rest bulbs are extinguished and are projected onto a corresponding state indicating hole 222 through the shell 21; corresponding state explanations are arranged below the indicating holes in the state indicating holes 222, and when the light is lightened, a user can obtain the state of the fire fighting pressure switch according to the explanations below the state indicating holes 222. It is understood that the status indicating hole 222 may be circular, rectangular, triangular or any other type of shape that satisfies the requirement that the status indicating hole 222 is capable of indicating the particular status of the fire fighting pressure switch.

Specifically, the button protection film 223 is at least four circular membranes disposed under the state indicating hole 221 at positions corresponding to positions of the buttons 112 for isolating the buttons 112 from the outside. The simple marks are arranged on the button protective films 223, corresponding descriptions are arranged under the marks, when a user sets the fire-fighting pressure switch, different button protective films 223 can be selected to be pressed according to different marks and descriptions, the button protective films 223 are in contact with the buttons 112, the buttons 112 are pressed under stress, the setting of the fire-fighting pressure switch is completed, and the appointed setting of the fire-fighting pressure switch is completed by pressing the appointed button protective films 223. It is understood that the button protection film 223 may have a circular, square, triangular or other shape as long as it satisfies the requirement that the button protection film can achieve its designated operating state.

The protective cover 23 includes a first protective cover 231 connected to the subject 21 and a second protective cover disposed on a surface of the first protective cover 231.

Please refer to fig. 6, which is a schematic structural diagram of the first protection cover 231 according to the present invention, wherein the shape of the first protection cover 231 is the same as the shape of the housing 21, and the first protection cover 231 is disposed behind the housing 21 for protecting the circuit board 1. A recess is formed at the center thereof for accommodating a power line, and a through hole is formed above the recess for exposing the terminal 123. When the installation fire control pressure switch, place circuit board 1 inside casing 21 and fixed, install first protective cover 231 to casing 21 rear after fixed the completion, terminal 123 can expose and be located the depressed part from the through-hole department of first protective cover 231 this moment for link to each other with the power cord. It is understood that the first protection cover 231 may be connected to the housing 21 by screws, mechanical engagement, or other types of connection methods, as long as the first protection cover 231 can fix the circuit board 1 inside the housing 21.

Please refer to fig. 7, which is a schematic structural diagram of the second protection cover 232 according to the present invention, the second protection cover 232 is disposed on the surface of the recess of the first protection cover 231 for separating the contact point between the terminal and the power line from the outside, and two through holes are disposed below the second protection cover 232 for leading the power line out of the recess of the first protection cover 231. After the power lines are connected, the second protective cover 232 is covered on the concave part of the first protective cover 231 to separate the connecting point from the outside, and two power lines are led out from the through hole during installation, so that the installation of the fire-fighting pressure switch is completed; when the power line has a problem, the second protective cover is opened, the power line with the problem is removed and connected with a new power line, and after the connection is completed, the second protective cover 232 is installed again, so that the replacement of the power line is completed. It is understood that the material of the second protection cover 232 may be polyethylene, polypropylene or other insulating materials, as long as the second protection cover 232 does not short-circuit the power line when isolating the power line from the outside.

So far, the technical solution of the present invention has been described with reference to the preferred embodiments shown in the drawings, but it is easily understood by those skilled in the art that the scope of the present invention is obviously not limited to these specific embodiments. Without departing from the principle of the present invention, a person skilled in the art can make equivalent changes or substitutions to the related technical features, and the technical solutions after these changes or substitutions will fall within the protection scope of the present invention.

Claims (9)

1. The utility model provides an adopt fire control pressure switch of discrete LED lamp combination which characterized in that, replaces its inside digital display screen as the pilot lamp through the longer LED lamp of life, includes:

the circuit board is used for loading indicator lamps and other electronic elements, a capacitor relay board is arranged in the circuit board, an electric wire is arranged at the bottom of the capacitor relay board and connected with the pressure sensor, and when the water pressure measured by the pressure sensor is too high or too low, the capacitor relay board can cut off a loop between a power line and an output line so as to control the water pressure in the pipeline to be measured;

a housing disposed outside the circuit board to protect the circuit board;

the connecting pipe is arranged below the shell and is used for being connected with a pipeline to be tested.

2. A fire pressure switch using a combination of discrete LED lights as recited in claim 1 wherein the circuit board is a double-layer board structure with two boards placed side by side comprising:

a display panel for loading buttons and indicator lamps;

the capacitor relay board is arranged behind the display board and used for loading a capacitor, a relay and a binding post; and a connecting element disposed at the gap between the display panel and the capacitive relay panel to connect the display panel and the capacitive relay panel.

3. A fire pressure switch using a combination of discrete LED lights as recited in claim 2 wherein the indicator lights are arranged in a designated sequence, flash in a designated manner to form a number and project onto the housing; the buttons are uniformly arranged on the lower side of the indicator light and used for controlling the fire-fighting pressure switch.

4. A fire pressure switch using a combination of discrete LED lamps as recited in claim 2, wherein the capacitors and relays of the capacitive relay board are uniformly disposed on the side of the capacitive relay board close to the display board; the binding post is arranged on one side of the capacitor relay board far away from the display board and is used for being connected with the power line and the output line.

5. A fire pressure switch using a combination of discrete LED lights as recited in claim 4 wherein said housing comprises:

a cylindrical housing having an opening at one side;

the control panel is arranged on the closed side of the shell and used for controlling the fire-fighting pressure switch; and a protective cover disposed on the opening side of the housing for protecting the circuit board from damage.

6. A fire pressure switch using LED lamp combination as recited in claim 5, wherein the housing has through holes with different shapes formed on the surface thereof, which correspond to the indicator and the button on the display panel, respectively, for cooperating with the control panel to transmit the light of the display panel through the housing and to make the button on the display panel contact with the control panel.

7. A fire pressure switch using a combination of discrete LED lights as recited in claim 6 wherein the control panel comprises:

the display screen is used for displaying the brightness of the indicating lamp of the display panel, and the display screen is matched with the through hole of the shell so that the brightness is projected on the display screen in a digital form;

the state indicating hole is arranged below the display screen and used for displaying the brightness of the indicating lamp of the display panel; at least four button protection films uniformly disposed under the state indicating holes and contacting the buttons in the display panel to seal the buttons.

8. A fire pressure switch using a combination of discrete LED lights as recited in claim 7 wherein the status indicating holes cooperate with the through holes of the housing to provide light in the form of light spots to the different status indicating holes, status names being written below each status indicating hole to inform the user of the specific status of the fire pressure switch by illuminating the different status indicating holes.

9. A fire pressure switch using a combination of discrete LED lamps as defined in claim 7, wherein the surface of the button protection film is provided with icons, and corresponding instructions are written below the icon and the instructions, respectively, so that a user can press the designated button protection film according to the icon and the instructions, and press the button through the button protection film to complete the designated operation of the fire pressure switch.

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