LED explosion-proof lamp high temperature alarm device and system

Abstract

The present invention belongs to the technical field of alarm devices, and specifically relates to a high-temperature alarm device and system for an LED explosion-proof lamp, wherein the high-temperature alarm device includes a lamp body substrate, a lamp strip body, a heat pipe, a heat-conducting part, an electromagnetic ring, an insulating connecting rod, a central column, a reset part and a thermal stress switch. The heat-conducting part includes an insulating ring, a heat conductor and an armature body. The heat conductor can selectively contact the heat pipe. The insulating ring can establish a thermal connection with the heat conductor. The electromagnetic ring is arranged on the lamp body substrate and connected to a controller. The lower end of the insulating connecting rod is connected to the armature body and establishes a thermal connection with the insulating ring. The central column is connected to the upper end of the insulating connecting rod. The thermal stress switch is arranged on a thermally conductive substrate on the central column and connected to an alarm circuit module in the controller. The lower end of the reset part is connected to the lamp body substrate, and the upper end is connected to the central column, and an upward elastic thrust can be applied to the central column. This patent can be used to monitor the high temperature condition of the LED explosion-proof lamp and to alarm, which helps to avoid accidents.

Description

Technical Field

[0001] The invention relates to the field of alarm devices, and in particular to a high-temperature alarm device and system for an LED explosion-proof lamp. Background Art

[0002] Explosion-proof lamps are mostly used in dangerous places where flammable gases and dust exist. They can prevent the arc, spark or high temperature that may be generated inside the lamp from igniting the flammable gases and dust in the external environment, thus meeting the explosion-proof requirements. Therefore, explosion-proof lamps are widely used in mines and passages of various mining plants.

[0003] Among the existing explosion-proof lamps, the explosion-proof lamps with LED as the light source are the most widely used. For example, the technical solution disclosed in the patent document of the patent application number CN2008202280793, the patent name of which is a signal explosion-proof lamp for mining, shows that the light source used in the explosion-proof lamp is an LED light source, and has the advantages of high luminous intensity, low power consumption and long service life. At the same time, large and concentrated heat generation is a common problem of explosion-proof lamps with LED as the light source. Although the heat dissipation structure of LED explosion-proof lamps has been continuously optimized and improved in the technical route, its heat dissipation capacity has been significantly improved. However, for LED explosion-proof lamps used in special and complex environments such as deep in mines with relatively poor ventilation conditions, the problem of heat concentration in the lamp is still a problem that needs to be further solved, because the excessively concentrated heat in the mine can easily cause the combustion of combustible gases or dust in the air, and even explosions, causing serious safety accidents.

[0004] In view of the current problem of large heat dissipation of LED explosion-proof lamps, the main solution is to improve their heat dissipation performance, but the effect still cannot meet the ideal requirements. This patent intends to provide an LED explosion-proof lamp with an alarm function, so that when the heat dissipation of the lamp body is too large, it can issue an alarm in time and intervene in advance, and finally effectively avoid explosion accidents caused by high temperature of LED explosion-proof lamps, and the possibility of mine safety accidents. Summary of the invention

[0005] To achieve the above objectives, the LED explosion-proof lamp high temperature alarm device and system provided by the present invention can promptly issue an alarm when a high temperature condition occurs in the LED explosion-proof lamp, which helps to take preventive measures and implement intervention in advance to effectively avoid safety accidents.

[0006] The technical solutions adopted by the present invention to achieve its technical purpose are as follows.

[0007] This patent relates to a high temperature alarm device for an LED explosion-proof lamp, which includes a lamp body substrate, multiple lamp strips, multiple heat pipes, multiple heat conducting parts, an electromagnetic ring, multiple insulating connecting rods, a central column, a reset part and a thermal stress switch.

[0008] The light strip body and the heat pipe are both fixed on the light body substrate. A plurality of LED lamp beads are distributed on the light strip body. The heat pipe matches the light strip body and can conduct the heat generated by the light strip body to the outside and dissipate it. That is, the heat dissipation method of the LED explosion-proof lamp involved in this patent is the heat pipe method.

[0009] The heat conducting part comprises a heat insulating ring, a plurality of heat conducting bodies and a plurality of armature bodies.

[0010] The plurality of heat conductors and the plurality of armature bodies are fixed alternately on the heat insulating ring around the circumference, and the armature body is located between two adjacent heat conductors. It should be noted that one armature body can be respectively arranged between all two adjacent heat conductors; one armature body can also be arranged between some two adjacent heat conductors; and even multiple armature bodies can be arranged between two adjacent heat conductors.

[0011] The heat conductor includes a heat insulating shell and a heat conducting block wrapped in the heat insulating shell. The heat conducting block of the heat conductor can selectively contact and match with the heat pipe corresponding to each light strip body to achieve heat conduction.

[0012] A heat-conducting strip is wrapped in the heat-insulating ring and is connected to a heat-conducting block of the heat-conducting body, thereby enabling heat conduction.

[0013] The electromagnetic ring is fixed on the lamp body substrate and connected to the controller of the LED explosion-proof lamp. The on and off states of the electromagnetic ring can be controlled by the controller.

[0014] A plurality of heat-insulating connecting rods are alternately distributed around the circumference and the lower ends of the heat-insulating connecting rods are respectively fixedly connected to the armature bodies. The heat-conducting strips arranged in the heat-insulating connecting rods are matched and connected with the heat-conducting strips in the heat-insulating rings to realize heat conduction.

[0015] The outer wall of the central column is fixedly connected to the upper end of each heat-insulating connecting rod. A heat-conducting substrate is fixedly arranged on the central column and the heat-conducting substrate is matched and connected with the heat-conducting strips in the heat-insulating connecting rod to realize heat conduction.

[0016] The thermal stress switch matches the heat-conducting substrate on the central column, and can change state with the temperature change of the heat-conducting substrate, and switch between the on and off states. The thermal stress switch is connected to the alarm circuit module in the controller of the LED explosion-proof lamp.

[0017] The lower end of the reset part is fixedly connected to the center position of the lamp body substrate, and the upper end is connected to the central column. The reset part can exert a vertical upward elastic thrust on the central column, so that the central column can move up and down relative to the lamp body substrate.

[0018] When the electromagnetic ring is powered on, the magnetic attraction generated can move the armature body downward and is sufficient to move the thermal insulation ring downward synchronously, so that the heat conductive block on the heat conductor contacts and matches the corresponding heat pipe, establishing a heat conduction relationship.

[0019] When the electromagnetic ring is in a power-off state, its magnetic attraction disappears. At this time, the center column can move upward under the elastic thrust of the reset part and is sufficient to move the insulation ring upward synchronously, so that the heat conductive block on the heat conductor is separated from the corresponding heat pipe, and the heat conduction relationship is blocked.

[0020] Optionally, the reset part includes a cap body and a spring. The port of the cap body faces upward and the lower part is fixedly connected to the lamp body substrate.

[0021] The lower end of the center column is formed with an axial flange extending vertically downward, and the lower end of the axial flange can be kept in a state of being inserted into the cap body. The upper end of the spring extends into the axial flange and contacts the lower end of the center column. The lower end of the spring extends into the cap body and contacts the inner bottom surface of the cap body. In the initial state, the spring can exert a vertical upward elastic thrust on the center column.

[0022] Optionally, the reset portion further includes a plurality of stud groups.

[0023] A radial flange is formed on the side wall of the cap body. The stud groups are alternately distributed around the circumference, including studs and nuts. Through holes are formed on the radial flange formed on the side wall of the cap body, which are matched with each stud one by one, and the lower end of the stud passes through the through hole on the radial flange downward and is connected to the nut. The upper end of the stud is fixedly connected to the center column.

[0024] By adjusting the length of the threaded hole of the stud screwed into the center column and adjusting the axial position of the nut on the stud, the elastic thrust applied by the spring on the center column in the initial state can be adjusted.

[0025] Optionally, the reset part further includes a screw barrel. A boss is formed on the lamp body substrate and an external thread is formed on the side wall of the boss. The lower end of the screw barrel matches the boss, so that the screw barrel is fixedly connected to the lamp body substrate. The upper end of the screw barrel is connected to the lower end of the cap body. The height position of the center column can be adjusted by the screw barrel, and the size of the elastic thrust applied by the spring on the center column in the initial state can also be effectively adjusted.

[0026] Optionally, an end cap is fixedly provided at the upper end of the central column. The thermal stress switch is correspondingly provided below the end cap. A cooling fan is provided on the end cap and the cooling fan is connected to the controller of the LED explosion-proof lamp, and the controller can control the power on and off state of the cooling fan.

[0027] Optionally, the alarm in the alarm circuit module is connected in parallel with a host computer, and the alarm is connected in parallel with the host computer and then connected in series with the thermal stress switch. The host computer is connected to the early warning terminal and can send an alarm command to the early warning terminal when powered on.

[0028] Optionally, the control circuit module configured on the controller of the LED explosion-proof lamp includes an associated electromagnetic ring control circuit module, an alarm circuit module and a heat dissipation fan control circuit module.

[0029] The electromagnetic ring control circuit module includes an intermediate relay, a first timer, a second timer and a switch 1. The intermediate relay includes an intermediate relay body, a first normally closed contact switch, a first normally open contact switch, a second normally closed contact switch and a second normally open contact switch. The first timer includes a normally open contact switch, and the second timer includes a normally closed contact switch.

[0030] The switch 1, the second normally closed contact switch, the electromagnetic ring and the first timer are connected in series.

[0031] The second normally open contact switch is connected in series with the normally closed contact switch, and then connected in parallel with the normally open contact switch, and then connected in series with the intermediate relay body and the second timer.

[0032] The alarm circuit module includes switch 2 and a host computer, and the host computer can send an alarm command to the outside when powered on. The host computer is connected to an external early warning terminal, and the host computer can send an alarm command to the early warning terminal when powered on. Switch 2, the first normally closed contact switch, the thermal stress switch and the host computer are connected in series.

[0033] The first normally open contact switch is connected in series with the cooling fan to form a cooling fan control circuit module.

[0034] Optionally, the alarm circuit module further includes an alarm, and after the alarm is connected in parallel with the host computer, it is then connected in series with switch 2, the first normally closed contact switch, and the thermal stress switch.

[0035] Optionally, the control circuit module configured on the controller of the LED explosion-proof lamp includes an associated electromagnetic ring control circuit module and an alarm circuit module.

[0036] The electromagnetic ring control circuit module includes an intermediate relay, a first timer, a second timer and a switch 1. The intermediate relay includes an intermediate relay body, a first normally closed contact switch, a second normally closed contact switch and a second normally open contact switch. The first timer includes a normally open contact switch, and the second timer includes a normally closed contact switch.

[0037] The switch 1, the second normally closed contact switch, the electromagnetic ring and the first timer are connected in series.

[0038] The second normally open contact switch is connected in series with the normally closed contact switch, and then connected in parallel with the normally open contact switch, and then connected in series with the intermediate relay body and the second timer.

[0039] The alarm circuit module includes switch 2 and a host computer, and the host computer can send an alarm command to the outside when it is powered on. The host computer is connected to an external early warning terminal, and the host computer can send an alarm command to the early warning terminal when it is powered on.

[0040] Switch 2, the first normally closed contact switch, the thermal stress switch and the host computer are connected in series.

[0041] Preferably, the alarm circuit module also includes an alarm, and after the alarm is connected in parallel with the host computer, it is then connected in series with the second switch, the first normally closed contact switch, and the thermal stress switch.

[0042] This patent also relates to a high temperature alarm system for LED explosion-proof lamps, which includes the above-mentioned high temperature alarm device for LED explosion-proof lamps.

[0043] The beneficial effect of the present invention is that the high temperature alarm device and system of the LED explosion-proof lamp involved in the present invention can promptly issue an alarm when a high temperature condition is detected in the LED explosion-proof lamp, which helps to remind the user to take precautions in advance and implement intervention in advance to avoid accidents. It not only helps to recover or reduce losses, but also helps to promptly and accurately find the LED explosion-proof lamp with abnormal high temperature phenomenon, so as to accurately locate, maintain and replace it, and improve the working efficiency. It even helps to remotely control the LED explosion-proof lamp with abnormal high temperature phenomenon to cut off the power supply in time, and promptly and accurately cut off the source of danger.

[0044] In addition, the LED explosion-proof lamp high temperature alarm device and system involved also have the advantages of simple structure, low modification, production or construction cost, and are conducive to promotion and application. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] Figure 1 It is a schematic diagram of the top structure of an implementation scheme of the present invention.

[0046] Figure 2 It is a schematic diagram of the structure of the matching of the central column and the reset part in the present invention.

[0047] Figure 3 for Figure 2 Schematic diagram of the local enlarged structure at point A in the middle.

[0048] Figure 4 This is a schematic diagram of a control circuit module configured on a controller of an LED explosion-proof lamp (only part is shown).

[0049] In the figure: 10 lamp body substrate, 11 boss, 12 control circuit module, 121 electromagnetic ring control circuit module, 122 alarm circuit module, 123 cooling fan control circuit module, 13 intermediate relay body, 131 first normally closed contact switch, 132 first normally open contact switch, 133 second normally closed contact switch, 134 second normally open contact switch, 14 first timer, 141 normally open contact switch, 15 second timer, 151 normally closed contact switch, 16 switch one, 17 switch two;

[0050] 20 light strips, 21 LED lamp beads; 30 heat pipes;

[0051] 40 heat conducting part, 41 heat insulating ring, 42 heat conducting body, 43 armature body; 50 electromagnetic ring; 60 heat insulating connecting rod, 61 flange plate;

[0052] 70 center column, 71 axial flange, 72 end face, 721 threaded countersunk hole;

[0053] 80 reset portion, 81 cap body, 811 radial flange, 82 stud group, 821 double-headed stud, 822 nut, 83 spring, 84 screw barrel; 90 thermal stress switch, 91 end cap. DETAILED DESCRIPTION

[0054] The structures, proportions, sizes, etc. illustrated in the drawings of the specification are only used to match the contents disclosed in the specification for people familiar with this technology to understand and read, and are not used to limit the limiting conditions for the implementation of the present invention, so they have no substantial technical significance. Any modification of the structure, change of the proportion relationship or adjustment of the size, without affecting the effects and purposes that can be achieved by the present invention, should still fall within the scope of the technical contents disclosed by the present invention. At the same time, the terms such as "upper", "lower", "front", "back", "middle" and so on quoted in this specification are only for the convenience of description, and are not used to limit the scope of the implementation of the present invention. The change or adjustment of their relative relationship should also be regarded as the scope of the implementation of the present invention without substantially changing the technical contents.

[0055] like Figures 1 to 3 The LED explosion-proof lamp high temperature alarm device shown includes a lamp body substrate 10, six lamp strip bodies 20, twelve heat pipes 30, a heat conducting part 40, an electromagnetic ring 50, six heat insulating connecting rods 60, a central column 70, a reset part 80 and a thermal stress switch 90.

[0056] The lamp body substrate 10 is in a disc shape, and the lamp strip body 20 is in a strip shape, so that the lamp strip body 20 is arranged along the radial direction of the lamp body substrate 10, and a plurality of lamp strip bodies 20 are alternately distributed around the circumference and fixed on the disc surface of the lamp body substrate 10. On the lamp strip body 20, a plurality of LED lamp beads 21 are alternately distributed along its length direction.

[0057] The heat pipe 30 corresponds to the light strip body 20, specifically, two heat pipes 30 are arranged on one light strip body 20. The heat pipe 30 is also fixed on the light body substrate 10. The heat pipe 30 can conduct the heat emitted by the light strip body 20 outward and finally dissipate it into the surrounding air. That is, the heat dissipation method of the LED explosion-proof lamp involved in this patent is the heat pipe method.

[0058] The number ratio of the heat pipes 30 to the light strip body 20 may also be a one-to-one correspondence, or a configuration relationship of three or even more heat pipes 30 corresponding to one light strip body 20 , and so on.

[0059] The lamp body substrate 10 can also be selected to be rectangular, square, oval, irregular, etc. The lamp strip body 20 can be a straight strip, a curved strip, or an arc strip.

[0060] The above technical contents related to the lamp body substrate 10 , the lamp strip body 20 and the heat pipe 30 belong to the scope of the prior art and thus will not be described in detail.

[0061] like Figure 1 As shown, the heat conducting part 40 includes an insulating ring 41, six heat conductors 42 and six armature bodies 43 (or armature plates). The insulating ring 41 is in a circular ring shape, and in other embodiments, it can be a ring-shaped member of other regular or irregular shapes. The six heat conductors 42 and the six armature bodies 43 are evenly distributed and fixed on the insulating ring 41 around the circumference, and each armature body 43 is located at the center between two adjacent heat conductors 42.

[0062] It should be noted that an armature body 43 may be provided between each two adjacent heat conductors 42. Figure 1 As shown; an armature body 43 may be correspondingly arranged between two adjacent heat conductors 42; and even a plurality of armature bodies 43 may be arranged between two adjacent heat conductors 42.

[0063] The heat conductor 42 includes a heat-insulating shell and a heat-conducting metal block wrapped in the heat-insulating shell, so that the heat received by the heat-conducting metal block in the heat conductor 42 is conducted toward the relevant structure according to the design requirements, effectively reducing the amount of heat loss to the surrounding air. The heat conductor 42 is matched with the light strip body 20 in a one-to-one correspondence, and the heat-conducting metal block in the heat conductor 42 is relatively arranged above the outer end side of the heat pipe 30 of each light strip body 20. Through the control of relevant structures (such as the electromagnetic ring 50, the reset part 80, etc., which will be described in detail later), the heat-conducting metal block of the heat conductor 42 can selectively contact and match with the heat pipe 30 corresponding to each light strip body 20, and a heat conduction relationship can be established between the heat conductor 42 and the corresponding heat pipe 30 to achieve heat conduction.

[0064] The heat insulating ring 41 contains a heat conductive metal strip, which is connected and matched with the heat conductive metal block of the heat conductor 42, and a heat conduction relationship is established between the heat conductor 42 and the heat insulating ring 41 to achieve heat conduction. The so-called heat insulating ring 41 can achieve heat insulation (relative heat insulation) with the surrounding air, but it does not mean that it cannot conduct heat.

[0065] The electromagnetic ring 50 is fixed on the lamp body substrate 10 and connected to the controller of the LED explosion-proof lamp, and the on and off state of the electromagnetic ring 50 can be controlled by the controller. The electromagnetic ring 50 can be set by a timer, etc., so that the electromagnetic ring 50 maintains the power-on state for a certain period of time, switches to the power-off state and maintains it for a certain period of time, and then enters the power-on state again and maintains it for a certain period of time, and switches between the power-on and power-off states regularly in a reciprocating cycle.

[0066] like Figures 1 to 3 As shown, six insulating connecting rods 60 are evenly spaced around the circumference and the lower ends of the insulating connecting rods 60 are fixedly connected to the armature bodies 43 in a one-to-one correspondence. The heat-conducting metal strips provided in the insulating connecting rods 60 are matched and connected with the heat-conducting metal strips in the insulating ring 41, and a heat conduction relationship is established between the insulating ring 41 and each insulating connecting rod 60 to achieve heat conduction. Similarly, the so-called insulating connecting rod 60, that is, it can achieve heat insulation (relative insulation) with the surrounding air, but it does not mean that it cannot conduct heat.

[0067] A flange plate 61 is provided at the lower end of the heat-insulating connecting rod 60 , and the armature body 43 is fixedly connected to the heat-insulating connecting rod 60 via the flange plate 61 .

[0068] The outer wall of the central column 70 (the central column body also has heat insulation capability) is fixedly connected to the upper end of each heat-insulating connecting rod 60, so that the central column 70 is connected to the heat-insulating ring 41 or the heat-conducting part 40 as a whole. A heat-conducting substrate is fixedly provided on the central column 70 and the heat-conducting substrate is matched and connected with the heat-conducting metal strip in the heat-insulating connecting rod 60, and a heat-conducting relationship is established between the heat-insulating connecting rod 60 and the heat-conducting substrate of the central column 70 to achieve heat conduction.

[0069] The thermal stress switch 90 matches the heat-conducting substrate on the central column 70 and can change state with the temperature change of the heat-conducting substrate and switch between the on and off states. The thermal stress switch 90 is connected to the alarm circuit module in the controller of the LED explosion-proof lamp.

[0070] Under the heat conduction structure established above, when the heat conductor 42 is in contact with the heat pipe 30, it can obtain heat from the heat pipe 30 and can conduct the heat to the insulation ring 41. After the insulation ring 41 is subjected to the heat, the heat is conducted to the heat-conducting substrate on the central column 70 through the insulation connecting rod 60, so that the temperature of the heat-conducting substrate changes, so as to prompt the thermal stress switch 90 to follow the temperature fluctuation of the heat-conducting substrate and when the temperature of the heat-conducting substrate reaches the set warning threshold, the thermal stress switch 90 can be switched from the normally open state to the closed state, so that the alarm of the alarm circuit module is energized and an alarm signal is issued.

[0071] In some specific embodiments, the controller of the LED explosion-proof lamp can be understood to include a combination of a built-in controller disposed in the LED explosion-proof lamp and a controller disposed outside, and the two controllers can be connected via a wireless communication module.

[0072] The lower end of the reset portion 80 is fixedly connected to the center of the lamp body substrate 10, and the upper end is connected to the center column 70. The reset portion 80 can exert a vertical upward elastic thrust on the center column 70, so that the center column 70 can move up and down relative to the lamp body substrate 10.

[0073] When the electromagnetic ring 50 is powered on, the magnetic attraction force generated can move the armature body 43 downward and is sufficient to move the insulation ring 41 downward synchronously, so that the heat-conducting metal block on the heat conductor 42 contacts and matches the corresponding heat pipe 30, thereby establishing a heat conduction relationship.

[0074] When the electromagnetic ring 50 is in a power-off state, its magnetic attraction disappears. At this time, the central column 70 can move upward under the elastic thrust of the reset portion 80 and is sufficient to move the insulating ring 41 upward synchronously, so that the heat-conducting metal block on the heat conductor 42 is separated from the corresponding heat pipe 30, so that the heat conduction relationship is blocked.

[0075] like Figure 2 , Figure 3 As shown, the reset portion 80 includes a cap body 81 , a plurality of stud groups 82 , a spring 83 and a screw barrel 84 .

[0076] The port of the cap body 81 faces upward and the lower part is connected to the boss 11 provided on the lamp body substrate 10 through the screw barrel 84, so that the cap body and the lamp body substrate 10 establish a fixed connection relationship.

[0077] External threads are formed on the side wall of the boss 11. The lower end of the screw barrel 84 matches the external threads on the boss 11 to fix the screw barrel 84 on the lamp body substrate 10. The upper end of the screw barrel 84 is connected to the lower end of the cap body 81 through a threaded structure.

[0078] An annular radial flange 811 is formed on the upper part of the side wall of the cap body 81. The stud groups 82 are alternately distributed around the circumference, and each includes a stud 821 and a nut 822. Through holes are formed on the radial flange 811, which are matched one by one with the stud 821, and the lower end of the stud 821 passes downward through the through hole on the radial flange 811 and is connected to the nut 822. The upper end of the stud 821 matches with a plurality of threaded countersunk holes 721 distributed around the circumference on the end surface 72 of the lower part of the center column 70, so that the upper end of the stud 821 is fixedly connected to the center column 70.

[0079] The lower end of the center column 70 is formed with an axial flange 71 extending vertically downward, and the lower end of the axial flange 71 can be inserted into the cap body 81. The threaded countersunk holes 721 on the end surface 72 are distributed around the periphery of the axial flange 71.

[0080] The upper end of the spring 83 extends into the axial flange 71 and contacts the lower end of the center column 70. The lower end of the spring 83 extends into the cap body 81 and contacts the inner bottom surface of the cap body 81.

[0081] In the initial state, the spring 83 can exert an elastic thrust upward vertically on the center column 70 to support the multiple heat-insulating connecting rods 60 and the heat-conducting part 40 connected to the center column 70. When the electromagnetic ring 50 is powered on to generate magnetic attraction, the armature body 43 can be urged to move downward along the vertical direction with the center column 70, so that the degree of compression of the spring 83 is increased, and the elastic extension force generated is greater than the gravity of the center column 70, the heat-insulating connecting rod 60, the heat-conducting part 40, etc. During this period, the length of the axial flange 71 extending into the cap body 81 increases. When the electromagnetic ring 50 is powered off, the magnetic attraction force acting on the armature body 43 disappears, and under the action of the elastic extension force (elastic thrust) of the spring 83, it is sufficient to urge the center column 70 to move upward in the vertical direction. During this period, the heat-conducting part 40 moves upward synchronously, and the length of the axial flange 71 extending into the cap body 81 decreases, and the spring 83 restores the degree of compression in the initial state.

[0082] By adjusting the length of the threaded hole of the stud 821 screwed into the center column 70, and adjusting the axial position of the nut 822 on the stud 811, the purpose of adjusting the elastic thrust of the spring 83 on the center column 70 in the initial state can be achieved. The height position of the cap body 81 or the height position of the center column 70 can be adjusted by the screw barrel 84, and the elastic thrust of the spring 83 on the center column 70 in the initial state can also be effectively adjusted. Therefore, the above-mentioned reset part 80 implementation structure can take into account the adjustment of the initial height position of the center column 70 and the adjustment of the initial state of the spring 83.

[0083] The original state of the thermal stress switch 90 is a normally open strain switch. When the temperature reaches the designed threshold, it can be switched to the on state. Moreover, once the temperature drops below the threshold, it can be reset and return to the normally open state.

[0084] like Figure 2 , Figure 4 As shown, an end cap 91 is fixedly provided at the upper end of the central column 70. The thermal stress switch 90 is correspondingly provided directly below the end cap 91. A heat dissipation fan is provided on the end cap 91 and the heat dissipation fan is connected to the controller of the LED explosion-proof lamp, specifically to the heat dissipation fan control circuit module in the controller. In this way, the power-on and power-off states of the heat dissipation fan can be controlled by the controller.

[0085] like Figure 4 As shown, it shows part of the control circuit module 12 configured on the controller of the LED explosion-proof lamp, and includes an electromagnetic ring control circuit module 121, an alarm circuit module 122 and a cooling fan control circuit module 123.

[0086] The electromagnetic ring control circuit module 121 includes an intermediate relay, a first timer 14, a second timer 15 and a switch 16. The intermediate relay includes an intermediate relay body 13, a first normally closed contact switch 131, a first normally open contact switch 132, a second normally closed contact switch 133 and a second normally open contact switch 134. The first timer 14 includes a normally open contact switch 141, and the second timer 15 includes a normally closed contact switch 151.

[0087] The switch 16, the second normally closed contact switch 133, the electromagnetic ring 50 and the first timer 14 are connected in series.

[0088] The second normally open contact switch 134 is connected in series with the normally closed contact switch 151 , and then connected in parallel with the normally open contact switch 141 , and then connected in series with the intermediate relay body 13 and the second timer 15 .

[0089] The alarm circuit module 122 includes a switch 17, an alarm and a host computer. The host computer can send an alarm command to the outside when powered on. The host computer is connected to a remote early warning terminal and can send an alarm command to the remote early warning terminal when powered on.

[0090] After the alarm is connected in parallel with the host computer, it is then connected in series with the switch 2 17 , the first normally closed contact switch 131 , and the thermal stress switch 90 .

[0091] The first normally open contact switch 132 is connected in series with the cooling fan disposed on the end cap 91 to form a cooling fan control circuit module 123 .

[0092] The alarm in the alarm circuit module 122 in the controller of the LED explosion-proof lamp is connected in parallel with the host computer, and the alarm is connected in parallel with the host computer and then connected in series with the thermal stress switch 90, etc. The host computer is connected to the remote early warning terminal and the host computer can send an alarm signal or an alarm command / instruction to the remote early warning terminal when powered on. The host computer can be connected to the remote early warning terminal (which can also be called a remote alarm terminal) through the Internet of Things. The host computer can be a computer, or a single-chip microcomputer or a programmable controller, etc., which can directly issue a control command.

[0093] In the illustrated alarm circuit module 122, the thermal stress switch 90 is connected in series with a start button switch (i.e., switch 2 17). After the start button switch is pressed, the thermal stress switch 90 can be connected to the circuit of the alarm circuit module 122. Pressing the start button switch again can disconnect the thermal stress switch 90 from the circuit of the alarm circuit module 122.

[0094] The remote early warning terminal's display screen can display all connected LED explosion-proof lamps. When a certain LED explosion-proof lamp has a high temperature condition and sends back an alarm command to the remote early warning terminal, the corresponding schematic icon of the LED explosion-proof lamp on the display screen will flash continuously or change from dark to bright (the schematic icons of each LED explosion-proof lamp under normal conditions are all dark / gray icons). When multiple LED explosion-proof lamps in a small area sound an alarm at the same time (when the number of LED explosion-proof lamps in a small area that sound an alarm is relatively high), the buzzer of the remote early warning terminal can sound an alarm.

[0095] Figure 4 In the control circuit module 12 shown, the circuit of the alarm circuit module 122 is connected to the normally closed contact switch of the intermediate relay (i.e., the first normally closed contact switch 131). The circuit of the cooling fan control circuit module 123 is connected to the normally open contact switch of the same intermediate relay (i.e., the first normally open contact switch 132), so that the circuit of the alarm circuit module 122 and the circuit of the cooling fan control circuit module 123 can only be in the conductive state. At the same time, the electromagnetic ring 500 in the electromagnetic ring control circuit module 121 is connected in series with the normally open contact switch (i.e., the second normally closed contact switch 133) of the same intermediate relay, so the circuit of the alarm circuit module 122 and the circuit connected in series with the electromagnetic ring 50 can be in a power-on state at the same time, and when the electromagnetic ring 50 is energized, the associated connection structure that attracts the heat conductor 42 to the center column 70 moves downward at the same time, and the heat received by the heat conductor 42 from the heat pipe 30 is conducted to the heat conductive substrate on the center column 70, and then conducted to the thermal stress switch 90, thereby realizing the detection of high temperature conditions of the LED explosion-proof lamp.

[0096] When the electromagnetic ring 50 is powered off due to the change in the on / off state of the intermediate relay, the alarm circuit module 122 is in the off state at the same time. Therefore, when the heat conductor 42 is out of contact with the heat pipe 30, the alarm circuit module 122 cannot send any alarm signal. At the same time, the heat dissipation fan is powered on at this time, so during this period, the heat dissipation fan can physically cool the thermal stress switch 90, which can prevent false alarms caused by excessively high temperatures in the space where the thermal stress switch 90 is located.

[0097] Figure 4 The action process of the control circuit module 12 is as follows:

[0098] (1) Press switch 1 16 and switch 2 17 to keep the two switches in the closed state. At this time, the electromagnetic ring 50 of the electromagnetic ring control circuit module 121 and the first timer 14 (i.e., the body of the first timer, the same below) are powered on, and the first timer 14 starts timing. At the same time, the alarm circuit module 122 is in a standby state, that is, before the temperature reaches the set threshold of the thermal stress switch 90, the alarm circuit module 122 is always in a disconnected state, and the alarm and / or the host computer cannot be powered; after the temperature reaches the set threshold of the thermal stress switch 90, the alarm circuit module 122 can be switched to a conducting state, and the alarm and / or the host computer cannot be powered. During this period, because the intermediate relay body 13 is in a power-off state, the cooling fan remains in a power-off state.

[0099] (2) When the first timer 14 completes the timing, the normally open contact switch 141 of the first timer 14 closes, and the intermediate relay body 13 is energized. At this moment, the following changes occur: 1) The second normally closed contact switch 133 opens, and the electromagnetic ring 50 and the first timer 14 lose power. 2) Although the first timer 14 loses power, the second normally open contact switch 134 closes at the moment the intermediate relay body 13 is energized. Therefore, from the moment the first timer 14 completes the timing to a period of time after the first timer 14 loses power (the timing period of the second timer 15), the intermediate relay body 13 and the second timer 15 are both kept in the energized state. 3) The first normally closed contact switch 131 opens, so that the alarm circuit module 122 is in a fully de-energized state. Even if the thermal stress switch 90 reaches the set threshold, the alarm circuit module 122 cannot be turned on, which can prevent false alarms from occurring again. 4) The first normally open contact switch 132 closes, and the heat dissipation fan starts to run to cool down the peripheral environment of the thermal stress switch 90.

[0100] (3) When the second timer 15 finishes timing, the normally closed contact switch 151 of the second timer 15 is disconnected, causing the intermediate relay body 13 and the second timer 15 to lose power. At this moment, the following changes occur: 1) The second normally closed contact switch 133 is reset and closed, the electromagnetic ring 50 and the first timer 14 are energized, and the first timer 14 starts to count again; 2) The normally open contact switch 141 of the first timer 14 remains in the disconnected state, but the second normally open contact switch 134 is reset and disconnected, so the intermediate relay body 13 and the second timer 15 remain in the de-energized state; 3) The first normally closed contact switch 131 is reset and closed, and the alarm circuit module 122 enters the standby state; 4) The first normally open contact switch 132 is reset and disconnected, and the cooling fan remains in the de-energized state.

[0101] (4) When the first timer 14 finishes timing, the above-mentioned change process from (2) to (3) is repeated, and the cycle continues.

[0102] Cutting off switch 1 16 can completely cut off the circuit of electromagnetic ring and first timer 14. Cutting off switch 2 17 can completely cut off alarm circuit module 122. Switch 1 16 and switch 2 17 are both manually controlled.

[0103] The above embodiments are merely illustrative of the principles and effects of the present invention, and are not intended to limit the present invention. The present invention can be improved in many aspects without violating the overall concept, and those familiar with the technology can modify or change the above embodiments without violating the spirit and scope of the present invention. Therefore, all equivalent modifications or changes made by those with ordinary knowledge in the technical field without departing from the spirit and technical ideas disclosed by the present invention should still be covered by the claims of the present invention.

Claims

1. A high temperature alarm device for an LED explosion-proof lamp, comprising a lamp body substrate (10), a plurality of lamp strip bodies (20) and a plurality of heat pipes (30); the lamp strip bodies (20) and the heat pipes (30) are both fixed on the lamp body substrate (10) and the heat pipes (30) are matched with the lamp strip bodies (20) so as to conduct the heat generated by the lamp strip bodies (20) outward; the characteristics are as follows: It also includes a heat conducting portion (40), an electromagnetic ring (50), a plurality of heat insulating connecting rods (60), a central column (70), a reset portion (80) and a thermal stress switch (90); The heat conducting part (40) comprises a heat insulating ring (41), a plurality of heat conducting bodies (42) and a plurality of armature bodies (43); the plurality of heat conducting bodies (42) and the plurality of armature bodies (43) are fixed to the heat insulating ring (41) alternately around the circumference; The heat conductor (42) comprises a heat insulating shell and a heat conducting block wrapped in the heat insulating shell; the heat conducting block of the heat conductor (42) can selectively contact and match with each heat pipe (30) at the same time; A heat-conducting strip is wrapped inside the heat-insulating ring (41), and the heat-conducting strip is connected and matched with the heat-conducting block of the heat-conducting body (42); The electromagnetic ring (50) is fixed on the lamp body substrate (10) and connected to the controller of the LED explosion-proof lamp, and the on and off states of the electromagnetic ring (50) can be controlled by the controller; A plurality of heat-insulating connecting rods (60) are alternately distributed around a circle and the lower ends of the heat-insulating connecting rods (60) are respectively fixedly connected to the armature bodies (43); a heat-conducting strip provided in the heat-insulating connecting rods (60) is matched and connected to a heat-conducting strip in the heat-insulating ring (41); The outer wall of the central column (70) is fixedly connected to the upper end of each heat-insulating connecting rod (60); a heat-conducting substrate is fixedly provided on the central column (70) and the heat-conducting substrate is matched and connected to the heat-conducting strip in the heat-insulating connecting rod (60); The thermal stress switch (90) matches the heat-conducting substrate on the central column (70) and can change state in accordance with the temperature change of the heat-conducting substrate, and switch between the on and off states; the thermal stress switch (90) is connected to an alarm circuit module in a controller provided on the LED explosion-proof lamp; The lower end of the reset portion (80) is fixedly connected to the center position of the lamp body substrate (10), and the upper end is connected to the center column (70); the reset portion (80) can exert a vertical upward elastic thrust on the center column (70), so that the center column (70) can move up and down relative to the lamp body substrate (10); When the electromagnetic ring (50) is in a powered state, the magnetic attraction force generated can cause the armature body (43) to move downward with the heat insulating ring (41), so that the heat conductive block on the heat conductive body (42) contacts and matches the heat pipe (30); When the electromagnetic ring (50) is in a power-off state, the central column (70) can move upward with the heat insulating ring (41) under the elastic thrust of the reset portion (80), so that the heat conducting block on the heat conductor (42) is separated from the heat pipe (30).

2. The high temperature alarm device for LED explosion-proof lamp according to claim 1 is characterized in that: The reset portion (80) comprises a cap body (81) and a spring (83); the port of the cap body (81) faces upward and the lower portion thereof is fixedly connected to the lamp body substrate (10); the lower end of the central column (70) is formed with an axial flange (71) extending vertically downward and the lower end of the axial flange (71) can be inserted into the cap body (81); The upper end of the spring (83) extends into the axial flange (71) and contacts the lower end of the center column (70); the lower end of the spring (83) extends into the cap body (81) and contacts the inner bottom surface of the cap body (81); the spring (83) can apply a vertical upward elastic thrust to the center column (70).

3. The high temperature alarm device for LED explosion-proof lamp according to claim 2 is characterized in that: The reset portion (80) further comprises a plurality of stud groups (82); the stud groups (82) are alternately distributed around the circumference and comprise studs (821) and nuts (822); A radial flange (811) is formed on the side wall of the cap body (81); through holes corresponding to and matching each stud (821) are formed on the radial flange (811), and the lower end of the stud (821) passes downward through the through hole on the radial flange (811) and is connected to the nut (822); the upper end of the stud (821) is fixedly connected to the center column (70).

4. The LED explosion-proof lamp high temperature alarm device according to claim 2 or 3, characterized in that: The reset portion (80) further comprises a screw barrel (84); a boss (11) is formed on the lamp body substrate (10), and an external thread is formed on the side wall of the boss (11); the lower end of the screw barrel (84) matches the boss (11), so that the screw barrel (84) and the lamp body substrate (10) are fixedly connected; and the upper end of the screw barrel (84) is connected to the lower end of the cap body (81).

5. The LED explosion-proof lamp high temperature alarm device according to claim 1 is characterized in that: An end cap (91) is fixedly provided at the upper end of the central column (70); a thermal stress switch (90) is correspondingly provided below the end cap (91); a heat dissipation fan is provided on the end cap (91) and is connected to a controller of the LED explosion-proof lamp, and the controller can control the on / off state of the heat dissipation fan.

6. The high temperature alarm device for LED explosion-proof lamp according to claim 5 is characterized in that: The control circuit module (12) configured on the controller of the LED explosion-proof lamp comprises an associated electromagnetic ring control circuit module (121), an alarm circuit module (122) and a cooling fan control circuit module (123); The electromagnetic ring control circuit module (121) comprises an intermediate relay, a first timer (14), a second timer (15) and a switch 1 (16); the intermediate relay comprises an intermediate relay body (13), a first normally closed contact switch (131), a first normally open contact switch (132), a second normally closed contact switch (133) and a second normally open contact switch (134); the first timer (14) comprises a normally open contact switch (141), and the second timer (15) comprises a normally closed contact switch (151); The switch 1 (16), the second normally closed contact switch (133), the electromagnetic ring (50) and the first timer (14) are connected in series; The second normally open contact switch (134) is connected in series with the normally closed contact switch (151), and then connected in parallel with the normally open contact switch (141), and then connected in series with the intermediate relay body (13) and the second timer (15); The alarm circuit module (122) comprises a second switch (17) and a host computer, and the host computer can send an alarm command to the outside when powered on; the second switch (17), the first normally closed contact switch (131), the thermal stress switch (90) and the host computer are connected in series; The first normally open contact switch (132) is connected in series with the cooling fan to form a cooling fan control circuit module (123).

7. The high temperature alarm device for LED explosion-proof lamp according to claim 6, characterized in that: The alarm circuit module (122) also includes an alarm, and after the alarm is connected in parallel with the host computer, it is connected in series with the second switch (17), the first normally closed contact switch (131), and the thermal stress switch (90).

8. The high temperature alarm device for LED explosion-proof lamp according to claim 1 is characterized in that: The control circuit module (12) configured on the controller of the LED explosion-proof lamp comprises an associated electromagnetic ring control circuit module (121) and an alarm circuit module (122); The electromagnetic ring control circuit module (121) comprises an intermediate relay, a first timer (14), a second timer (15) and a switch 1 (16); the intermediate relay comprises an intermediate relay body (13), a first normally closed contact switch (131), a second normally closed contact switch (133) and a second normally open contact switch (134); the first timer (14) comprises a normally open contact switch (141), and the second timer (15) comprises a normally closed contact switch (151); The switch 1 (16), the second normally closed contact switch (133), the electromagnetic ring (50) and the first timer (14) are connected in series; The second normally open contact switch (134) is connected in series with the normally closed contact switch (151), and then connected in parallel with the normally open contact switch (141), and then connected in series with the intermediate relay body (13) and the second timer (15); The alarm circuit module (122) comprises a second switch (17) and a host computer, and the host computer can send an alarm command to the outside when powered on; the second switch (17), the first normally closed contact switch (131), the thermal stress switch (90) and the host computer are connected in series.

9. The LED explosion-proof lamp high temperature alarm device according to claim 8, characterized in that: The alarm circuit module (122) also includes an alarm, and after the alarm is connected in parallel with the host computer, it is connected in series with the second switch (17), the first normally closed contact switch (131), and the thermal stress switch (90).

10. An LED explosion-proof lamp high temperature alarm system, characterized in that: The invention comprises the high temperature alarm device of LED explosion-proof lamp involved in any one of claims 1 to 8.

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