CN107166300B - An explosion-proof explosion-proof lamp - Google Patents

Abstract

The invention discloses an explosion-proof type explosion-proof lamp, which aims to provide a explosion-proof type explosion-proof lamp with the advantages of safety, reliability and wide illumination range, and is suitable for an explosive gas environment 0 region, an explosive gas environment 1 region, an explosive gas environment 2 region and a combustible dust environment 20 region, an explosive gas environment 21 region and an explosive gas environment 22 region, and the technical scheme is characterized by comprising a base body, a lamp holder, a lamp strip, a pressing ring, a protective cover, a toughened glass cover clamped between the pressing ring and the protective cover and forming a first cavity with the base body, a middle cover fixed on the upper part of the base body and used for forming a second cavity, and a shell cover fixedly connected above the middle cover and forming a third cavity, wherein the first cavity and the second cavity are provided with an outgoing line cavity, the outgoing line cavity is sealed by epoxy resin, the lamp holder has a seven-frustum-shaped structure, the lamp strip is communicated with the second cavity through a lead wire, a power supply device is arranged in the second cavity, the outgoing lines of the power supply device are also sealed by epoxy resin.

Description

An explosion-proof explosion-proof lamp

technical field

The invention relates to the technical field of lamps, in particular to an explosion-proof explosion-proof lamp.

Background technique

Explosion-proof lamps refer to lamps that take various specific measures to prevent surrounding explosive mixtures such as explosive gas, combustible dust, gas and other environments. One of the very important explosion-proof principles of explosion-proof lamps is to limit the temperature of the surface of the casing, the surface of parts or the surface of electronic components in contact with explosive gases and combustible dust, and to limit the temperature of the electrical contact surface to be lower than its minimum ignition temperature or ignition temperature. . The flameproof type explosion-proof lamp is one of the explosion-proof types, and its shell can withstand the explosion of the explosive mixture that penetrates into the interior of the shell through any joint surface or structural gap of the shell without damaging it, and will not cause external damage by a , ignition of explosive atmospheres formed by various gases or vapors.

In the past, the light source part, the power supply part and the contact mechanism of the explosion-proof lamps were set in the same cavity, or there were circulation gaps. When the arc escapes from the circulation gap, the practical life is reduced, the surface temperature of the casing rises sharply, and a safety hazard occurs. Moreover, the light source and the power supply are in the same cavity, so the internal structure of the cavity is bound to be very complicated. Most of them lead to uneven stress and large volume space, which is prone to pressure overlap. The traditional explosion-proof type of explosion-proof lamps has many disadvantages in safety precautions.

SUMMARY OF THE INVENTION

In view of the deficiencies in the prior art, the purpose of the present invention is to provide an explosion-proof explosion-proof lamp, which has the advantages of safety, reliability and wide illumination range.

The above technical purpose of the present invention is achieved through the following technical solutions: a flameproof explosion-proof lamp, comprising a base body, a lamp holder fixed at the bottom of the base body, a light bar distributed on the surface of the lamp holder, a pressure lamp fixed on the outer periphery of the base body ring, a protective cover fixed on the outer circumference of the pressure ring, a tempered glass cover that is clamped between the pressure ring and the protective cover and forms a first cavity with the base body, a middle cover fixed on the upper part of the base body and used to form a second cavity, and a shell cover that is fixedly connected above the middle cover and forms a third cavity, the first cavity and the second cavity have outlet cavities, the outlet cavities are sealed by epoxy resin, and the lamp holder has seven edges The table-shaped structure, the light bar is connected to the second cavity through the wire, the power supply device is arranged in the second cavity, the light bar is connected to the power supply device, the contact mechanism is arranged in the third cavity, and the wire of the power supply device passes through The middle cover is connected with the contact mechanism, and the outlet of the power supply unit is also sealed by epoxy resin.

Through the above arrangement, the first cavity is used as the part of light emission, using a tempered glass cover and a lamp holder with a seven-sided pyramid structure, so that the light bar can radiate outward during the lighting process. This structure effectively improves the illumination range, and the power supply The device is isolated in the second cavity, so when there is a problem with the power supply device, the impact on the first cavity and the third cavity can be minimized; in addition, after the contact mechanism is arranged in the third cavity, the The arc during the action of the contact can be effectively closed by the third cavity, so that the arc will not escape, the arc is completely isolated, the three cavities are isolated from each other, and work independently of each other. Some parts have problems and can be replaced individually to reduce costs.

As a specific solution of the present invention, it may be preferable that: the contact mechanism includes a static contact plate fixed in the housing cover, a contact rod arranged under the static contact plate, an insulating seat installed above the middle cover, and the contact rod is arranged on the insulating seat The insulating seat and the contact rod are directly provided with a piston structure, and the piston structure includes a slideway on the insulating seat for the contact rod to slide, and a sleeve sleeved on the contact rod. Rubber ring, rubber ring and slideway seal, the rubber ring divides the slideway of the insulating seat into two spaces.

Through the above arrangement, the ordinary explosion-proof lamp does not have such a contact mechanism. In order to further improve the safety performance of the explosion-proof lamp, the contact rod is arranged on the insulating seat, so that under normal conditions, the spring will push out the contact rod, Therefore, the contact rod contacts the static contact plate, and the power supply of the power supply device can be turned on, otherwise the line of the power supply device is in a disconnected state. When the temperature in the third cavity is abnormally high, the rubber ring divides the slideway of the insulating seat into two spaces. At this time, the contact rod can compress the spring under the magnetic force of the external magnet, so that the contact rod can leave the Static touch panel, which can control the operation of explosion-proof lights in a timely manner under abnormal temperature conditions for effective prevention. The piston structure effectively protects the contact rod, and the contact rod avoids wear during the movement process, which can ensure the smooth movement of the contact rod.

As a specific solution of the present invention, it may be preferable that an air bag for pushing the contact rod away from the static contact plate is further provided between the slideway and the rubber ring.

Through the above arrangement, when the temperature becomes high, the airbag will expand, and at this time, the airbag will push the contact rod away from the static contact piece, so that the circuit can be cut off.

As a specific solution of the present invention, it may be preferable that: the inner layer of the tempered glass is provided with a circle of thermochromic coating.

Through the above settings, in order to improve safety, after setting a circle of thermochromic coating, when the temperature is higher, the color of the coating changes obviously. After being illuminated by light, there will be a color indication on the ground, which can prevent high temperature , The temperature change in the tempered glass cover is directly reflected by the color of the light. Of course, because the thermochromic coating has only one circle, and other lighting areas are not affected, the brightness of the illumination can be effectively ensured.

As a specific solution of the present invention, it may be preferable that the inclination of the side surface of the lamp holder is between 15-25 degrees.

Through the above arrangement, the side surface of the lamp holder is inclined and arranged, so that the lighting area can be effectively increased, so that the light of the light bar is diffused to the surrounding.

As a specific solution of the present invention, it may be preferable that: the contact mechanism is an overheat protector.

Through the above arrangement, the use of the overheat protector can play the function of automatically cutting off the circuit when the temperature is too high. Even if the overheat protector is abnormal, it can be isolated in the third cavity, thereby effectively preventing the expansion of the influence.

As a specific solution of the present invention, it may be preferable that: a test module is arranged in the third cavity, the test module includes a heating element and a temperature sensitive resistor, and the heating element increases the temperature in the third cavity after the power is turned on. temperature and simulate a high temperature environment, the temperature sensitive resistor is used to feed back temperature data in the third cavity, and the overheat protector is protected by the temperature environment in the third cavity.

Through the above settings, in some safety occasions, we need to use the equipment very carefully and carefully to avoid the occurrence of safety accidents. Since the overheat protector has been sealed in the third cavity, if it is necessary to test whether it works normally, whether It can effectively cut off protection against abnormal temperature, so we need to conduct an effective test before use to ensure that the overheat protector can work normally to reduce the risk. Internal temperature conditions, so as to ensure that the overheating protector can operate normally and can play the role of overheating protection.

As a specific solution of the present invention, it may be preferable that: the thermochromic coating is composed of a transition layer and a thermochromic variable emissivity coating; the transition layer is a NiCrAl or NiCrAlY coating, with a thickness of 50-100 microns; The thermochromic variable emissivity coating is a La0.7Ca0.3-xSrxMnO3 coating with a thickness of 70-300 microns, and the value of x in the La0.7Ca0.3-xSrxMnO3 coating is 0.1≤x≤0.3.

Through the above arrangement, the thermochromic coating can change the emissivity, so that it can display different colors, so as to improve the warning effect.

To sum up, the present invention has the following beneficial effects:

1. Adopt multiple space isolation technologies to improve the efficiency of explosion-proof isolation, which is safe and reliable;

2. The contact mechanism is adopted to further improve the safety of the controllable degree;

3. The coating process is adopted to enable the light to warn;

4. The use of tempered glass cover and lamp holder structure to improve the lighting area.

Description of drawings

Fig. 1 is the structural representation of this embodiment;

Figure 2 is a bottom view of the lamp holder;

Figure 3 is a bottom view of the protective cover;

Fig. 4 is a structural example diagram of the contact mechanism;

FIG. 5 is an enlarged view of part A of FIG. 4 .

In the figure, 1, base body; 2, lamp holder; 3, light bar; 4, pressure ring; 5, protective cover; 61, first cavity; 62, second cavity; 63, third cavity; 64, outlet Cavity; 7, tempered glass cover; 8, middle cover; 9, shell cover; 10, power supply device; 11, contact mechanism; 111, static contact plate; 112, contact rod; 113, insulating seat; 114, spring; 115, slide; 116, rubber ring; 117, air bag; 12, overheat protector; 13, test module; 131, heating element; 132, temperature sensitive resistor.

Detailed ways

The present invention will be further described in detail below with reference to the accompanying drawings.

Example 1:

As shown in Figure 1, a flameproof explosion-proof lamp is shown. The flameproof explosion-proof lamp includes a base body 1, a lamp holder 2 fixed on the bottom of the base body 1, a light bar 3 distributed on the surface of the lamp holder 2, a pressure ring 4 fixed on the outer circumference of the base body 1, and a protection fixed on the outer circumference of the pressure ring 4. The cover 5, the tempered glass cover 7 which is clamped between the pressure ring 4 and the protective cover 5 and forms the first cavity 61 with the base body 1, the middle cover 8 which is fixed on the upper part of the base body 1 and is used to form the second cavity 62, and The shell cover 9 is fixedly connected above the middle cover 8 and forms a third cavity 63 .

The first cavity 61 and the second cavity 62 have outlet cavities 64 , and the outlet cavities 64 are sealed by epoxy resin, that is, epoxy resin is filled on the outlet cavities 64 .

As shown in FIG. 2 , it is shown that the lamp holder 2 has a heptagonal truncated structure, and the inclination of the side surface of the lamp holder 2 is between 15-25 degrees. The side surface of the lamp socket 2 is inclined, so that the lighting area can be effectively increased, so that the light of the light bar 3 can be diffused to the surrounding. Modular design for easy installation.

In addition, for the protective cover 5, its structure is shown in Figure 3. In order to reduce the occlusion of the light and ensure the structural strength under the premise of ensuring safety, a protective cover 5 similar to the protective net structure is designed, which can effectively protect The tempered glass cover is protected from the impact of larger clothes and foreign objects in the outside world.

Referring to FIG. 1 , the light bar 3 is connected to the second cavity 62 through wires, the second cavity 62 is provided with the power supply device 10 , and the light bar 3 is connected to the power supply device 10 . The contact mechanism 11 is arranged in the third cavity 63 , the wires of the power supply device 10 are connected to the contact mechanism 11 through the middle cover 8 , and the outgoing wires of the power supply device 10 are also sealed by epoxy resin.

The design of the above-mentioned structure, based on the first cavity 61 as the part of the light emission, adopts the tempered glass cover 7, and the lamp holder 2 of the heptagonal truncated structure, so that the light bar 3 can radiate outward in the process of emitting light, and this structure is effective. The illumination range is improved, and the power supply device 10 is isolated in the second cavity 62, so when a problem occurs in the power supply device 10, the impact on the first cavity 61 and the third cavity 63 can be minimized; in addition, the contact mechanism After 11 is arranged in the third cavity 63, the arc during the action of the contact can be effectively closed by the third cavity 63, so that the arc will not escape, the arc is completely isolated, and the three cavities are isolated from each other. It is safer when working independently and as a whole, and when some of them have problems, they can be replaced individually to reduce costs.

In order to further improve the safety, various improvements are also made to the contact mechanism 11 .

Among them, as shown in FIG. 5 , the structure of a single contact mechanism 11 is shown. The contact mechanism 11 includes a static contact plate 111 fixed in the housing cover 9 , a contact rod 112 arranged under the static contact plate 111 , and installed in the middle cover 8 . The insulating seat 113 above, the contact rod 112 is arranged on the insulating seat 113 and resists the static contact plate 111 through the spring 114, the insulating seat 113 and the contact rod 112 are directly provided with a piston structure, and the piston structure includes the insulating seat 113 for contact The slideway 115 on which the rod 112 slides, and the rubber ring 116 sleeved on the contact rod 112, the rubber ring 116 and the slideway 115 are sealed, and the rubber ring 116 divides the slideway 115 of the insulating seat 113 into two spaces. An air bag 117 for pushing the contact rod 112 away from the static contact plate 111 is also provided between the slideway 115 and the rubber ring 116 . This contact mechanism 11 can be used alone.

Ordinary explosion-proof lamps do not have such a contact mechanism 11. In order to further improve the safety performance of this explosion-proof lamp, the contact rod 112 is arranged on the insulating seat 113, so that under normal circumstances, the spring 114 pushes the contact rod 112 out. , so that the contact rod 112 contacts the static contact plate 111 , the power supply of the power supply device 10 can be turned on, otherwise the line of the power supply device 10 is in a disconnected state. When the temperature in the third cavity 63 is abnormally high, the rubber ring 116 divides the slideway 115 of the insulating seat 113 into two spaces, and the contact rod 112 can compress the spring 114 under the magnetic force of an external magnet. , so that the contact rod 112 is separated from the static contact plate 111 , so that the explosion-proof lamp can be controlled in a timely manner under abnormal temperature conditions for effective prevention. The piston structure effectively protects the contact rod 112 , and the contact rod 112 avoids wear during the movement process, which can ensure the smooth movement of the contact rod 112 .

When the temperature becomes high, the air bag 117 will expand, and at this time, the air bag 117 will push the contact rod 112 away from the static contact piece, so that the circuit can be cut off.

As a more preferred embodiment, the inner layer of the tempered glass may be provided with a ring of thermochromic coating. The thermochromic coating consists of a transition layer and a thermochromic variable emissivity coating; the transition layer is a NiCrAl or NiCrAlY coating with a thickness of 50-100 microns; the thermochromic variable emissivity coating is La0.7Ca0. 3-xSrxMnO3 coating, the thickness is 70~300 microns, and the value of x in the La0.7Ca0.3-xSrxMnO3 coating is 0.1≤x≤0.3. The solid-phase reaction method is to mix high-purity (above 99.99%) La2O3, CaCO3, SrCO3, and MnO2 in an ethanol solvent according to a stoichiometric ratio, and then pre-burn at 900-1100 ° C for 22 hours to obtain a pre-reactant. , the pre-reactant is pressed into shape and then sintered at 1300-1450 ° C for 20 hours to form a La0.7Ca0.3-xSrxMnO3 bulk material. This thermochromic coating is an existing disclosed technology, but it can have unexpected effects when applied to this structure. In addition to the effect of the thermochromic coating itself, the thermochromic coating can change the emissivity, Thereby, different colors can be displayed, so that the warning effect can be improved. For the light and explosion-proof whole, it makes the overall use safe and reliable.

Specifically, after setting a circle of thermochromic coating, when the temperature is higher, the color of the coating changes obviously. After being irradiated by light, there will be a color indication on the ground, so as to prevent high temperature, the tempered glass cover 7 The temperature change of the light is directly reacted by the color of the light. Of course, because the thermochromic coating has only one circle, and other lighting areas are not affected, it can effectively ensure the brightness of the irradiation.

Example 2:

Specifically, for the improvement of the contact mechanism 11, the overheat protector 12 is used as the contact mechanism 11 to be installed in the third cavity 63. The overheat protector 12 can replace the contact mechanism 11 in the above-mentioned embodiment, or it can be simultaneously If there is, double protection is carried out in parallel.

As shown in FIG. 4 , a test module 13 is arranged in the third cavity 63 , and the test module 13 includes a heating element 131 and a temperature sensitive resistor 132 . After the heating element 131 is powered on, the temperature in the third cavity 63 increases and simulates In a high temperature environment, the temperature sensitive resistor 132 is used to feed back the temperature data in the third cavity 63 , and the overheat protector 12 is protected by the temperature environment in the third cavity 63 .

The use of the overheat protector 12 can play the function of automatically cutting off the circuit when the temperature is too high. Even if the overheat protector 12 is abnormal, it can be isolated in the third cavity 63, thereby effectively preventing the expansion of the influence.

In some safety occasions, we need to use the equipment very carefully and carefully to avoid the occurrence of safety accidents. Since the overheat protector 12 has been sealed in the third cavity 63, if it is necessary to test whether it works normally, whether it can be effective To cut off protection against abnormal temperature, we need to carry out an effective test before use to ensure that the overheat protector 12 can work normally to reduce the risk. The internal temperature is detected, so as to ensure that the overheat protector 12 can operate normally and can play the role of overheat protection.

This specific embodiment is only an explanation of the present invention, and it does not limit the present invention. Those skilled in the art can make modifications without creative contribution to the present embodiment as required after reading this specification, but as long as the rights of the present invention are used All claims are protected by patent law.

Claims (7)

1. A flameproof type explosion-proof lamp, characterized in that: it comprises a base (1), a lamp holder (2) fixed on the bottom of the base (1), a light bar (3) distributed on the surface of the lamp holder (2), A pressure ring (4) on the outer circumference of the base body (1), a protective cover (5) fixed on the outer circumference of the pressure ring (4), clamped between the pressure ring (4) and the protective cover (5) and connected to the base body ( 1) The tempered glass cover (7) forming the first cavity (61), the middle cover (8) fixed on the upper part of the base body (1) and used to form the second cavity (62), and the middle cover (8) fixedly connected ) above and forming the cover (9) of the third cavity (63), the first cavity (61) and the second cavity (62) have outlet cavities (64), the outlet cavities ( 64) Sealed by epoxy resin, the lamp holder (2) has a seven-sided pyramid structure, the light bar (3) is connected to the second cavity (62) through a wire, and a power supply device (10) is arranged in the second cavity (62) ), the light bar (3) is connected to the power supply device (10), a contact mechanism (11) is arranged in the third cavity (63), and the wires of the power supply device (10) pass through the middle cover (8) and the contact The point mechanism (11) is connected, and the outlet of the power supply device (10) is also sealed by epoxy resin; The contact mechanism (11) comprises a static contact plate (111) fixed in the housing cover (9), a contact rod (112) arranged under the static contact plate (111), and an insulation mounted above the middle cover (8). The seat (113), the contact rod (112) is arranged on the insulating seat (113) and abuts against the static contact plate (111) through the spring (114), the insulating seat (113) and the contact rod (112) are directly provided with A piston structure, the piston structure includes a slideway (115) on an insulating seat (113) for the contact rod (112) to slide, and a rubber ring (116) sleeved on the contact rod (112), the rubber ring ( 116) and the slideway (115) are sealed, and the rubber ring (116) divides the slideway (115) of the insulating seat (113) into two spaces. 2. The flameproof type explosion-proof lamp according to claim 1, characterized in that: between the slideway (115) and the rubber ring (116), there is further provided a function to push the contact rod (112) away from the static contact plate (111) ) of the air bag (117). 3 . The flameproof explosion-proof lamp according to claim 1 , wherein the inner layer of the tempered glass is provided with a circle of thermochromic coating. 4 . 4 . The flameproof explosion-proof lamp according to claim 1 , wherein the inclination of the side surface of the lamp holder ( 2 ) is between 15 and 25 degrees. 5 . 5. The explosion-proof explosion-proof lamp according to claim 1, wherein the contact mechanism (11) is an overheat protector (12). 6. The flameproof explosion-proof lamp according to claim 5, characterized in that: a test module (13) is provided in the third cavity (63), and the test module (13) comprises a heating element (131) and a temperature sensitive resistor (132), the heating element (131) increases the temperature in the third cavity (63) and simulates a high temperature environment after the power is turned on, and the temperature sensitive resistor (132) is used to feed back the third cavity (63). The temperature data in the cavity (63), the overheat protector (12) is protected by the temperature environment in the third cavity (63). 7. The flameproof explosion-proof lamp according to claim 3, wherein the thermochromic coating is composed of a transition layer and a thermochromic variable emissivity coating; the transition layer is a NiCrAl or NiCrAlY coating. layer with a thickness of 50-100 microns; the thermochromic variable emissivity coating is a La _0.7 Ca _0.3-x Sr _x MnO ₃ coating with a thickness of 70-300 microns, La _0.7 Ca _{0.3- x} Sr _x MnO ₃ The value of x in the coating is 0.1≤x≤0.3.