flameproof box

Abstract

The present disclosure provides a flameproof box, belonging to the field of explosion-proof equipment. The flameproof box comprises a box body and a box door; one side of the box body has an opening; the box door is located at the opening and is connected with the box body, and the box door can open or close the opening; when the box door closes the opening, a plurality of Tesla valves are arranged between the relative outer walls of the box door and the box body, the inlet end of the Tesla valve is in communication with the outside of the flameproof box, and the outlet end of the Tesla valve is in communication with the inside of the flameproof box. The present disclosure can prevent the flame inside the flameproof box from escaping to the outside of the box through the gap between the box body and the box door.

Description

TECHNICAL FIELD

[0001] The present disclosure belongs to the field of explosion-proof equipment, and particularly relates to a flameproof enclosure. BACKGROUND

[0002] The flameproof enclosure is a kind of explosion-proof equipment, which is used in the environment of dangerous dust or dangerous gas. The flameproof enclosure can not only withstand the pressure generated by internal explosion, but also prevent the flame generated by internal explosion from escaping out of the flameproof enclosure.

[0003] In the related art, the flameproof enclosure mainly comprises a box body and a box door. The box body and the box door are connected to form a closed space. When explosion occurs in the flameproof enclosure, the flame generated by the explosion cannot spread outwards through the gap between the connecting surface of the box body and the box door due to the high precision of the connecting surface of the box body and the box door.

[0004] However, the precision of the connecting surface between the box body and the box door is not easy to maintain after a long period of use, resulting in a decrease in the functionality of the flameproof enclosure. SUMMARY

[0005] The present disclosure provides a flameproof enclosure, which can prevent the flame gas in the flameproof enclosure from escaping to the outside of the flameproof enclosure through the gap between the connecting surface of the box body and the box door. The technical solution is as follows:

[0006] The present disclosure provides a flameproof enclosure, which comprises a box body and a box door. One side of the box body has an opening. The box door is located at the opening, and the box door is connected to the box body. The box door can open or close the opening. When the box door closes the opening, a plurality of Tesla valves are arranged between the opposite outer walls of the box door and the box body. The inlet end of the Tesla valve is in communication with the outside of the flameproof enclosure, and the outlet end of the Tesla valve is in communication with the inside of the flameproof enclosure.

[0007] In one implementation manner of the present disclosure, the flameproof enclosure comprises at least two groups of Tesla valves. The Tesla valves in the same group are arranged along the circumference of the opening at intervals, respectively, and the Tesla valves in each group are arranged at intervals in the direction away from the opening, so that the gas escaping from the inside of the flameproof enclosure to the outside of the flameproof enclosure needs to pass through a plurality of Tesla valves.

[0008] In another implementation manner of the present disclosure, the Tesla valves in different groups are arranged in a staggered manner, so that the opening is sealed and surrounded by the Tesla valves, thereby improving the stability of the flameproof enclosure.

[0009] In yet another implementation form of the disclosure, the Tesla valve comprises a first straight path, a second straight path and an arcuate path. The first straight path and the second straight path have an acute angle therebetween, a first end of the first straight path and a first end of the second straight path are connected to form the outlet end of the Tesla valve through which gas in the explosion-proof box enters the Tesla valve, and a second end of the second straight path is the inlet end of the Tesla valve through which gas in the Tesla valve enters the external environment. A first end of the arcuate path is connected to a second end of the first straight path, and a second end of the arcuate path is connected to a middle portion of the second straight path. The first straight path and the arcuate path are located in the box or the door, and the second straight path is a gap between the opposite outer walls of the box and the door to allow gas to pass through.

[0010] In yet another implementation form of the disclosure, an inner diameter of the second straight path is not greater than inner diameters of the first straight path and the arcuate path.

[0011] In yet another implementation form of the disclosure, an acute angle is formed between a tangent line of one end of the arcuate path close to the second straight path and the second straight path.

[0012] In yet another implementation form of the disclosure, an outer edge of the opening has a first boss. The first boss is arranged along the outer edge of the opening. The first straight path and the arcuate path are respectively located in the first boss, and a first end of the first straight path and a second end of the arcuate path are respectively located on a side of the first boss facing the door.

[0013] In yet another implementation form of the disclosure, a side of the first boss facing the door has a first annular groove. The Tesla valve is located at a groove bottom of the first annular groove. A side of the door facing the first boss has a first convex ring, a protruding portion of the first convex ring is located in the first annular groove, and an outer wall of the first convex ring and an inner wall of the first annular groove have a gap therebetween.

[0014] In yet another implementation form of the disclosure, an outer edge of the door has a second boss. The first straight path and the arcuate path are respectively located in the second boss, and a first end of the first straight path and a second end of the arcuate path are respectively located on a side of the second boss facing the box.

[0015] In yet another implementation form of the disclosure, a side of the second boss facing the box has a second annular groove. The Tesla valve is located at a groove bottom of the second annular groove. A side of the box facing the second boss has a second convex ring, a protruding portion of the second convex ring is located in the second annular groove, and an outer wall of the second convex ring and an inner wall of the second annular groove have a gap therebetween.

[0016] The technical scheme provided by the embodiments of the present disclosure has at least the following beneficial effects:

[0017] The Tesla valve is a structure allowing one-way flow of fluid. Fluid entering from the inlet end can flow out from the outlet end, while fluid entering from the outlet end will be offset and lost during the flow, so it cannot flow out from the inlet end. After the box door closes the opening, a plurality of Tesla valves are formed between the relative outer walls of the box door and the box body. Since the outlet end of the Tesla valve is in communication with the interior of the explosion-proof box, after an explosion occurs in the interior of the explosion-proof box, the flame gas generated by the explosion will enter the Tesla valve from the outlet end of the Tesla valve and gradually extinguish and dissipate during the flow in the Tesla valve.

[0018] In addition, since the Tesla valve is formed between the relative outer walls of the box door and the box body, and the performance of the Tesla valve has little to do with the size of the flow channel inside, even if the precision of the joint surface between the box door and the box body is reduced, resulting in a gap, it will not greatly affect the performance of the Tesla valve, that is, it will not greatly affect the explosion-proof effect of the explosion-proof box. BRIEF DESCRIPTION OF DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present disclosure, the drawings needed in the embodiment description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present disclosure, and other drawings can also be obtained by those skilled in the art without creative labor.

[0020] Figure 1 is a structural schematic diagram of an explosion-proof box provided by the embodiments of the present disclosure;

[0021] Figure 2 is a schematic diagram of the arrangement of the Tesla valve provided by the embodiments of the present disclosure;

[0022] Figure 3 is a structural schematic diagram of an explosion-proof box provided by the embodiments of the present disclosure Figure 2 is a partial enlarged view of B of

[0023] Figure 4 is a partial enlarged view of A of Figure 1

[0024] Figure 5 is a partial enlarged view of C of Figure 4

[0025] Figure 6 is a partial enlarged view of D of Figure 4

[0026] Figure 7 is a structural schematic diagram of a box body provided by the embodiments of the present disclosure;​​​

[0027] Figure 8 is a structure diagram of the box door provided by the embodiment of the present disclosure. Figure 7 is a local enlarged view of E of the box door.

[0028] Figure 9 is a structure diagram of the box door provided by the embodiment of the present disclosure.

[0029] Figure 10 is a structure diagram of the box door provided by the embodiment of the present disclosure. Figure 9 is a local enlarged view of F of the box door.

[0030] The meanings of the symbols in the figure are as follows:

[0031] 1, box body;

[0032] 11, opening; 12, first boss; 121, first ring groove; 13, second boss ring;

[0033] 2, box door;

[0034] 21, second boss; 211, second ring groove; 22, first boss ring;

[0035] 3, Tesla valve;

[0036] 31, inlet end; 32, outlet end; 33, first straight path; 331, first end of the first straight path; 34, second straight path; 35, arc-shaped path; 351, second end of the arc-shaped path; 301, first group of Tesla valves; 302, second group of Tesla valves; 303, third group of Tesla valves; 304, fourth group of Tesla valves. DETAILED DESCRIPTION

[0037] In order to make the purpose, technical scheme and advantages of the present disclosure clearer, the embodiments of the present disclosure will be described in further detail below with reference to the drawings.

[0038] The embodiment of the present disclosure provides an explosion-proof box. Figure 1 is a structure diagram of the explosion-proof box provided by the embodiment of the present disclosure, referring to Figure 1 In the embodiment, the explosion-proof box comprises a box body 1 and a box door 2, and one side of the box body 1 has an opening 11. The box door 2 is located at the opening 11, and the box door 2 is connected with the box body 1, and the box door 2 can open or close the opening 11. When the box door 2 closes the opening 11, a plurality of Tesla valves 3 are arranged between the relative outer walls of the box door 2 and the box body 1, the inlet end 31 of the Tesla valve 3 is in communication with the outside of the explosion-proof box, and the outlet end 32 of the Tesla valve 3 is in communication with the inside of the explosion-proof box.

[0039] The Tesla valve 3 is a structure that allows unidirectional fluid flow. Fluid entering from the inlet 31 can flow out from the outlet 32, while fluid entering from the outlet 32 ​​will be offset and lost during flow, thus preventing it from flowing out from the inlet 31. After the door 2 closes the opening 11, multiple Tesla valves 3 are formed between the door 2 and the outer walls of the enclosure 1. Since the outlet 32 ​​of the Tesla valve 3 is connected to the interior of the explosion-proof enclosure, after an explosion occurs inside the enclosure, the flame gas produced by the explosion will enter the Tesla valve 3 from the outlet 32 ​​and gradually extinguish and dissipate during its flow within the Tesla valve 3.

[0040] In addition, since the Tesla valve 3 is formed by the relative outer wall between the door 2 and the box 1, and the performance of the Tesla valve 3 is not significantly related to the internal flow channel size, even if the precision of the mating surface between the door 2 and the box 1 is reduced, it will not significantly affect the performance of the Tesla valve 3, that is, it will not significantly affect the explosion-proof effect of the explosion-proof box.

[0041] Figure 2 This is a schematic diagram of the Tesla valve arrangement. Figure 2 for Figure 1 The right-hand viewpoint Figure 3 for Figure 2 The enlarged view at point B shows that, to better illustrate the arrangement of the Tesla valves 3, [the image is partially obscured]. Figure 2 and Figure 3 In the image, all Tesla valves 3 are displayed on a single plane, which can be understood as the projection of each Tesla valve 3 onto that plane.

[0042] Combination Figure 2 and Figure 3 In this embodiment, the explosion-proof box includes at least two sets of Tesla valves 3. The Tesla valves 3 in the same set are arranged at intervals along the circumference of the opening 11, and the Tesla valves 3 in each set are arranged at intervals along the direction away from the opening 11.

[0043] In the above implementation, the Tesla valves 3 of the same group are arranged in sequence to form a ring, and the rings formed by the Tesla valves 4 of each group are nested together at intervals to form an arrangement similar to concentric rings.

[0044] The Tesla valves 3 of the same group are arranged at intervals along the circumference of the opening 11 so that when the flame gas inside the explosion-proof box escapes along the circumference of the opening 11, it can all enter the Tesla valve 3, effectively preventing the flame gas from escaping outside the explosion-proof box.

[0045] The groups of Tesla valves 3 are arranged in sequence and spaced apart in the direction away from the opening 11, so as to supplement the previous group of Tesla valves 3. For example, if the previous group of Tesla valves 3 does not completely intercept all the flame gas, then the next group of Tesla valves 3 can intercept the escaped flame gas again, further ensuring that the flame gas does not escape to the outside of the explosion-proof box.

[0046] Referring to Figure 3 In the embodiment, the different groups of Tesla valves 3 are staggered, so that the opening 11 is sealed and surrounded by the Tesla valves 3.

[0047] In the above implementation, the different groups of Tesla valves 3 are staggered, which can better realize the supplement of each group of Tesla valves 3, and effectively ensure that the flame gas does not escape to the outside of the explosion-proof box. In addition, the opening 11 is sealed and surrounded by the Tesla valves 3, which means that the gaps between the Tesla valves 3 (of the same group) are filled by the different groups of Tesla valves 3, so that when the flame gas escapes from the opening 11, all the escape paths of the flame gas are surrounded by the different groups of Tesla valves 3.

[0048] Exemplarily, in Figure 3 , four groups of Tesla valves 3 are respectively shown. For ease of illustration, the first group of Tesla valves is labeled as 301, the second group of Tesla valves is labeled as 302, the third group of Tesla valves is labeled as 303, and the fourth group of Tesla valves is labeled as 304. Referring to Figure 3 , the first group of Tesla valves 301 and the second group of Tesla valves 302 are arranged in the same way, so that each Tesla valve 3 in the two groups of Tesla valves 3 corresponds to each other and forms a gap. The third group of Tesla valves 303 and the fourth group of Tesla valves 304 are arranged in the same way, and are staggered with the first group of Tesla valves 301 and the second group of Tesla valves 302, that is, corresponding to the gap of the first group of Tesla valves 301 and the second group of Tesla valves 302, so as to intercept the escaped flame gas at the gap.

[0049] Figure 4 is a partial enlarged view of A of Figure 1 provided by the embodiment of the present disclosure, Figure 5 is a partial enlarged view of C of Figure 4 provided by the embodiment of the present disclosure, in combination with Figure 4 and Figure 5In this embodiment, the Tesla valve 3 includes a first straight path 33, a second straight path 34, and an arc-shaped path 35. The first straight path 33 and the second straight path 34 form an acute angle. The first end 331 of the first straight path 33 and the first end of the second straight path 34 are connected to form the outlet end 32 of the Tesla valve 3, and the second end of the second straight path 34 is the inlet end 31 of the Tesla valve 3. The first end of the arc-shaped path 35 is connected to the second end of the first straight path 33, and the second end 351 of the arc-shaped path 35 is connected to the middle of the second straight path 34. The first straight path 33 and the arc-shaped path 35 are located inside the housing 1 or the door 2, and the second straight path 34 is the gap between the opposing outer walls of the housing 1 and the door 2.

[0050] The flaming gases generated by the explosion inside the explosion-proof enclosure will enter from the first end 331 of the first straight path 33 and the first end of the second straight path 34. The flaming gases entering the second straight path 34 will move along the length of the second straight path 34. The flaming gases entering the first straight path 33 will change their direction of movement via the arc path 35 until they collide with the flaming gases in the second straight path 34, causing some loss of the flaming gases in both the first and second straight paths 33. If the flaming gases are completely lost, they will enter another set of Tesla valves 3. Figure 6 for Figure 4 A magnified view of part D, combined with Figure 6 Based on the Tesla valve principle explained above, the flame gas is consumed again. This process continues until the flame gas is completely consumed.

[0051] It is easy to understand that the number of Tesla valve 3 groups is determined by the kinetic energy of the flame gas. If the kinetic energy of the flame gas is large, more Tesla valve 3 groups are set, and vice versa.

[0052] See you again Figure 6 In this embodiment, the inner diameter of the second straight path 34 is not greater than the inner diameter of the first straight path 33 and the arc path 35.

[0053] In the above implementation, the inner diameters of the first straight path 33 and the arc-shaped path 35 are larger than the inner diameter of the second straight path 34, making it easier for flame gas to enter the first straight path 33 and the arc-shaped path 35. This results in more flame gas passing through the first straight path 33 and the arc-shaped path 35 than entering the second straight path 34. Because more flame gas enters the first straight path 33 and the arc-shaped path 35, less flame gas enters the second straight path 34, thus effectively improving the flame gas blocking effect of the Tesla valve 3.

[0054] The flame gas output by the arc-shaped path 35 moves towards the flame gas entering the second straight path 34, thereby exerting force on each other, increasing the moving damping of the flame gas, slowing down the moving speed of the flame gas, thereby avoiding the leakage of the flame gas from the explosion-proof box, and improving the safety performance of the explosion-proof box.

[0055] It should be noted that although the inner diameter of the second straight path 34 is not greater than the inner diameters of the first straight path 33 and the arc-shaped path 35, the inner diameter of the second straight path 34 should not be too small, so as to avoid the situation that the second straight path 34 is blocked due to the entry of dust or impurities. It is easy to understand that under the condition that the inner diameter of the second straight path 34 meets the non-blocking condition, the first straight path 33 and the arc-shaped path 35 will naturally not have the problem of blocking.

[0056] As known from the foregoing, the first straight path 33 and the arc-shaped path 35 are located in the box body 1 or the box door 2. The following will introduce the two cases that the first straight path 33 and the arc-shaped path 35 are located in the box body 1 and the first straight path 33 and the arc-shaped path 35 are located in the box door 2, respectively.

[0057] In order to make the flame gas in the arc-shaped path 35 more smoothly enter the second straight path 34, in combination with Figure 5 and Figure 6 In the embodiment, the tangent line of the end of the arc-shaped path 35 close to the second straight path 34 and the second straight path 34 form an acute angle. In this way, it can be ensured that the flame gas has sufficient kinetic energy when entering the second straight path 34 from the arc-shaped path 35, thereby canceling the flame in the second straight path 34.

[0058] First, the first straight path 33 and the arc-shaped path 35 are located in the box body 1, Figure 7 is a structural schematic diagram of the box body provided by the embodiment of the disclosure, in combination with Figure 1 and Figure 7 In the embodiment, the outer edge of the opening 11 has a first boss 12. The first boss 12 is arranged along the outer edge of the opening 11. The first straight path 33 and the arc-shaped path 35 are located in the first boss 12, respectively, and the first end 331 of the first straight path 33 and the second end 351 of the arc-shaped path 35 are located on the side of the first boss 12 facing the box door 2.

[0059] The first boss 12 can increase the contact area between the box body 1 and the box door 2, and improve the tightness of the connection between the box body 1 and the box door 2. The first boss 12 can accommodate multiple groups of Tesla valves 3, thereby improving the stability and reliability of the box body 1.

[0060] For example, the first boss 12 is a cast structural component. During the casting process of the first boss 12, the first straight path 33 and the arc-shaped path 35 within the first boss 12 are formed accordingly. In this way, not only can the structural integrity of the first boss 12 be guaranteed, but the manufacturing efficiency of the first boss 12 can also be improved and the manufacturing cost can be saved.

[0061] After the first boss 12 is cast, the first boss 12 is welded to the edge of the opening 11 to complete the manufacturing of the box 1.

[0062] In some examples, enclosure 1 is made of aluminum bronze, which has high strength and hardness, capable of withstanding the shock wave generated by an explosion within enclosure 1. Furthermore, aluminum bronze is corrosion-resistant and wear-resistant, improving the applicability and service life of enclosure 1. Aluminum bronze does not generate sparks under impact, enhancing the stability of the explosion-proof enclosure.

[0063] In other examples, the material of the housing 1 may also be other high-temperature resistant and high-strength materials, and this disclosure does not limit this.

[0064] In some examples, a high-voltage electrostatic plating layer is sprayed onto the surface of the explosion-proof enclosure 1, which enables the explosion-proof enclosure to be used in more different environments, increases the applicability of the explosion-proof enclosure, increases the reliability of the explosion-proof enclosure, and improves the safety of personnel during the use of the explosion-proof enclosure.

[0065] Of course, in order to save manufacturing costs, the surface of the explosion-proof enclosure 1 may not be provided with a high-voltage electrostatic plating layer, and this disclosure does not impose any restrictions on this.

[0066] Figure 8 This is provided by the embodiments of this disclosure. Figure 7 See the enlarged view of point E. Figure 8 In this embodiment, the side of the first boss 12 facing the door 2 has a first annular groove 121 circumferentially. The Tesla valve 3 is located at the bottom of the first annular groove 121. The side of the door 2 facing the first boss 12 has a first protruding ring 22, the protrusion of the first protruding ring 22 is located in the first annular groove 121, and there is a gap between the outer wall of the first protruding ring 22 and the inner wall of the first annular groove 121.

[0067] The first annular groove 121 can accommodate each of the Tesla valves 3 in a group, allowing the Tesla valves 3 to be evenly distributed circumferentially along the opening 11. When the flame gas enters the groove of the first annular groove 121, the flame gas can move along the groove wall of the first annular groove 121, thus smoothly reaching the bottom of the groove 121. Since the Tesla valve 3 is located at the bottom of the first annular groove 121, it is beneficial for the flame gas to smoothly enter the Tesla valve 3.

[0068] Exemplarily, the gap between the outer wall of the first convex ring 22 and the inner wall of the first ring groove 121 is the second straight path 34.

[0069] Exemplarily, the first convex ring 12 has a plurality of groups of first ring grooves 121, and each group of first ring grooves 121 is connected with one group of Tesla valves 3.

[0070] Further, the first straight path 33 and the arc-shaped path 35 are located in the box door 2, Figure 9 is a structural schematic diagram of a box door provided by the embodiment of the present disclosure, which is combined with Figure 1 and Figure 9 In the embodiment, the outer edge of the box door 2 has a second convex ring 21. The first straight path 33 and the arc-shaped path 35 are located in the second convex ring 21 respectively, and the first end 331 of the first straight path 33 and the second end 351 of the arc-shaped path 35 are located on the side of the second convex ring 21 facing the box body 1 respectively.

[0071] The second convex ring 21 can increase the contact area between the box door 2 and the box body 1, and improve the tightness of the connection between the box door 2 and the box body 1. The second convex ring 21 can accommodate a plurality of groups of Tesla valves 3, thereby improving the stability and reliability of the box door 2. Moreover, the first end 331 of the first straight path 33 and the second end 351 of the arc-shaped path 35 are located on the side of the second convex ring 21 facing the box body 1 respectively, which can correctly guide the moving direction of the flame gas, facilitate the flame gas to enter the Tesla valve 3, and improve the reliability of the explosion-proof box.

[0072] Exemplarily, the second convex ring 21 is a cast structure, and the first straight path 33 and the arc-shaped path 35 in the second convex ring 21 are formed at the same time when the second convex ring 21 is cast. In this way, not only the structural integrity of the second convex ring 21 can be ensured, but also the manufacturing efficiency of the second convex ring 21 can be improved, and the manufacturing cost can be saved.

[0073] After the second convex ring 21 is cast, the second convex ring 21 and the edge of the box door 2 are welded together, thereby completing the manufacturing of the box door 2.

[0074] In some examples, the material of the box door 2 can be aluminum bronze. The aluminum bronze has high strength and hardness, so that the box door 2 can resist the shock wave generated by the explosion in the box body 1. Moreover, the aluminum bronze has corrosion resistance and wear resistance, which can effectively prevent the gap between the combined surfaces of the box body 1 and the box door 2 from being worn during repeated opening and closing of the box body 1 and the box door 2, thereby improving the applicability and service life of the box door 2. The aluminum bronze will not produce sparks under impact, which can improve the stability of the explosion-proof box.

[0075] In other examples, the material of the box door 2 can also be other high-temperature-resistant and high-strength materials, which are not limited in the present disclosure.

[0076] In some examples, a high-voltage electrostatic plating layer is sprayed on the surface of the door 2 of the explosion-proof box, so that the explosion-proof box can be applied to more different environments, increase the applicability of the explosion-proof box, and increase the reliability of the explosion-proof box, improve the safety of the worker during use of the explosion-proof box.

[0077] Of course, in order to save manufacturing costs, the surface of the door 2 of the explosion-proof box can also not be provided with a high-voltage electrostatic plating layer, and the present disclosure does not limit this.

[0078] Figure 10 is a local enlarged view of F of the explosion-proof box provided by the embodiment of the present disclosure Figure 9 , see Figure 10 In this embodiment, one side of the second boss 21 towards the box body 1 has a second ring groove 211 in the circumference. The Tesla valve 3 is located at the bottom of the second ring groove 211. One side of the box body 1 towards the second boss 21 has a second convex ring 13, the protruding part of the second convex ring 13 is located in the second ring groove 211, and there is a gap between the outer wall of the second convex ring 13 and the inner wall of the second ring groove 211.

[0079] The second ring groove 211 can be used to accommodate each Tesla valve 3 in a group, so that each Tesla valve 3 can be uniformly distributed along the circumference of the opening 11. When the flame gas enters the groove of the second ring groove 211, the flame gas can move along the groove wall of the second ring groove 211, so as to smoothly reach the bottom of the second ring groove 211. Since the Tesla valve 3 is located at the bottom of the second ring groove 211, it is beneficial for the flame gas to smoothly enter the Tesla valve 3.

[0080] Exemplarily, the gap formed between the outer wall of the second convex ring 13 and the inner wall of the second ring groove 211 is the second straight path 34.

[0081] Exemplarily, the second boss 21 has a plurality of groups of second ring grooves 211, and each group of Tesla valves 3 corresponds to the bottom of each group of second ring grooves 211.

[0082] Exemplarily, by providing the door 2 of the explosion-proof box according to the embodiment of the present disclosure, the opening 11 of the box body 1 can be opened or closed. When dust or impurities adhere to the joint surface between the box body 1 and the door 2, the worker can open the door 2 to remove the adhering dust or impurities using a dust removal brush, so as to keep the joint surface gap between the box body 1 and the door 2 from being affected by the change of the dust or impurities, and ensure the explosion-proof effect of the explosion-proof box. Moreover, the cleaning process is convenient, and the worker can clean the joint surface between the box body 1 and the door 2 at any time, improving the convenience of the explosion-proof box during use.

[0083] The above description is only an optional embodiment of the present disclosure, and is not intended to limit the present disclosure. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present disclosure shall be included in the protection scope of the present disclosure.

Claims

1. An explosion-proof box, characterized by The utility model relates to a kind of explosion-proof box, including box (1) and box door (2); One side of the box (1) has an opening (11); The box door (2) is located at the opening (11), and the box door (2) is connected with the box (1), and the box door (2) can open or close the opening (11); When the box door (2) closes the opening (11), there are a plurality of Tesla valves (3) between the opposite outer walls of the box door (2) and the box (1), the inlet end (31) of the Tesla valve (3) communicates with the outside of the explosion-proof box, and the outlet end (32) of the Tesla valve (3) communicates with the inside of the explosion-proof box; The Tesla valve (3) includes a first straight path (33), a second straight path (34) and an arc path (35), the first straight path (33) and the second straight path (34) have an acute angle, the first end of the first straight path (33) and the first end of the second straight path (34) are connected to form the outlet end (32) of the Tesla valve (3), the second end of the second straight path (34) is the inlet end (31) of the Tesla valve (3), the first end of the arc path (35) is connected with the second end of the first straight path (33), the second end of the arc path (35) is connected with the middle part of the second straight path (34), and the first straight path (33) and the arc path (35) are located in the box (1) or the box door (2), and the second straight path (34) is the gap between the opposite outer walls of the box (1) and the box door (2); The outer edge of the opening (11) has a first boss (12); the first boss (12) is surrounded along the outer edge of the opening (11); the first straight path (33) and the arc path (35) are located in the first boss (12) respectively, and the first end of the first straight path (33) and the second end of the arc path (35) are located on the side of the first boss (12) facing the box door (2); The side of the first boss (12) facing the box door (2) has a first ring groove (121); the Tesla valve (3) is located at the groove bottom of the first ring groove (121), and the box door (2) has a first boss ring (22) facing the first boss (12), the protruding part of the first boss ring (22) is located in the first ring groove (121), and there is a gap between the outer wall of the first boss ring (22) and the inner wall of the first ring groove (121); The outer edge of the box door (2) has a second boss (21); the first straight path (33) and the arc path (35) are located in the second boss (21) respectively, and the first end of the first straight path (33) and the second end of the arc path (35) are located on the side of the second boss (21) facing the box (1); The second boss (21) has a second ring groove (211) on one side of the box (1) in the circumferential direction; the Tesla valve (3) is located at the groove bottom of the second ring groove (211), one side of the box (1) towards the second boss (21) has a second convex ring (13), the convex part of the second convex ring (13) is located in the second ring groove (211), and the gap between the outer wall of the second convex ring (13) and the inner wall of the second ring groove (211) is provided; The gap between the groove wall of the first ring groove (121) and the groove wall of the second ring groove (211) forms the second straight path (34), and the gap between the groove wall of the first ring groove (121) and the groove wall of the second ring groove (211) forms a third straight path in communication with the outlet end (32) of the Tesla valve (3), the extension direction of the third straight path is the same as the extension direction of the first straight path (33), and the extension direction of the third straight path has an included angle with the extension direction of the second straight path (34); The first boss (12) is a cast structure, and the second boss (21) is a cast structure.

2. The flameproof enclosure according to claim 1, characterized in that The Tesla valve (3) comprises at least two groups; The Tesla valves (3) in the same group are arranged in the circumferential direction of the opening (11) and are spaced apart from each other, and the Tesla valves (3) in different groups are arranged in the direction away from the opening (11) and are spaced apart from each other.

3. The flameproof enclosure according to claim 2, wherein The Tesla valves (3) in different groups are staggered to seal and surround the opening (11).

4. The flameproof enclosure of claim 1, wherein, The inner diameter of the second straight path (34) is not greater than the inner diameters of the first straight path (33) and the arc-shaped path (35).

5. The flameproof enclosure of claim 1 wherein, The tangent line of one end of the arc-shaped path (35) close to the second straight path (34) and the second straight path (34) form an acute angle.

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