Explosion-proof tank

Abstract

The utility model discloses an explosion-proof box which comprises a shell, a box cover and an explosion-proof fastening assembly, and the box cover can be buckled to the opening position of the shell in a sealed mode. The anti-explosion fastening assembly comprises a buffer connecting piece and a fastening piece, one of the buffer connecting piece and the fastening piece is installed on the shell, and the other one of the buffer connecting piece and the fastening piece is installed on the box cover. When the explosion-proof box releases pressure, after the fastener moves, a pressure release channel is formed between the shell and the box cover. According to the explosion-proof box provided by the utility model, when the explosion-proof box releases pressure, the fastener is driven to slide in the strip-shaped hole under the action of relatively strong pressure in the explosion-proof box, in the process, the box cover and the shell are far away from each other to play a buffering role, but the box cover and the shell are not completely bounced off under the action of the fastener and the buffering connecting piece, so that the influence on other devices and a human body is reduced, and therefore, the explosion-proof box is convenient to use. The reliability of the explosion-proof box provided by the invention is improved.

Description

Technical Field

[0001] This application relates to the technical field of explosion-proof equipment, and particularly to an explosion-proof box. Background Art

[0002] During the operation of electrical structures, flammable gases are likely to be generated. Since electrical equipment has relatively high requirements for sealing, the flammable gases generated by electrical structures cannot be discharged in time, resulting in a gradual increase in the concentration of flammable gases inside the chassis. When an electric spark appears at a certain position inside the equipment, the entire internal space will be ignited, and then an explosion will occur. Therefore, electrical internal structures are installed inside an explosion-proof box.

[0003] However, even when electrical structures are placed inside an explosion-proof box, when an explosion shock wave is applied to the explosion-proof box, there may be a phenomenon that the explosion-proof box breaks and some structures may fly out, even resulting in injury incidents, thereby reducing the reliability of the explosion-proof box.

[0004] Therefore, how to improve the reliability of the explosion-proof box is a technical problem that needs to be solved urgently by those skilled in the art. Summary of the Utility Model

[0005] The purpose of this application is to provide an explosion-proof box with improved reliability.

[0006] The explosion-proof box provided by this application includes:

[0007] A housing;

[0008] A box cover that can be hermetically fastened to the opening position of the housing;

[0009] An explosion-proof fastening assembly, which includes a buffer connecting member and a fastener. One of the buffer connecting member and the fastener is installed on the housing, and the other is installed on the box cover; when the explosion-proof box relieves pressure, after the fastener is displaced, a pressure relief channel is formed between the housing and the box cover.

[0010] Optionally, in the above explosion-proof box, a strip-shaped hole is provided on the buffer connecting member, and when the explosion-proof box relieves pressure, the fastener slides along the strip-shaped hole.

[0011] Optionally, in the above explosion-proof box, the first end of the buffer connecting member is connected to the box cover or the housing, the second end of the buffer connecting member is a free end, and the length direction of the strip-shaped hole extends along the direction from the first end to the second end of the buffer connecting member.

[0012] Optionally, in the above explosion-proof box, a buffer portion is provided at the first end of the buffer connecting member; when the explosion-proof box changes from a sealed state to a pressure relief state, the buffer portion elongates along the assembly direction of the housing and the box cover.

[0013] Optionally, in the above explosion-proof box, when the explosion-proof box is in a sealed state, the buffer portions are in a stacked state.

[0014] Optionally, in the above explosion-proof box, when the explosion-proof box is in a sealed state, the buffer portions abut against the end face of the housing or the end face of the box cover.

[0015] Optionally, in the above explosion-proof box, the box cover includes:

[0016] A cover body;

[0017] A side connector, the side connector being annular and connected to the outer periphery of the cover body, and the buffer connector being connected to the side connector.

[0018] Optionally, in the above explosion-proof box, the buffer connector is further provided with buffer holes, the buffer holes and the strip holes are isolated by connecting ribs, and when the explosion-proof box is depressurized, the fastener breaks through the connecting ribs.

[0019] Optionally, in the above explosion-proof box, there are a plurality of the buffer holes, and the plurality of buffer holes are sequentially arranged on the buffer connector along the assembly direction of the housing and the box cover.

[0020] Optionally, in the above explosion-proof box, there are a plurality of the explosion-proof fastening assemblies, at least one of the plurality of buffer connectors is a first buffer connector, and at least one is a second buffer connector;

[0021] The first end of the first buffer connector is connected to the box cover or the housing, the second end of the first buffer connector is a free end, and the length direction of the strip hole extends along the direction from the first end to the second end of the first buffer connector; a buffer portion is provided at the first end of the first buffer connector, and when the explosion-proof box changes from a sealed state to a depressurized state, the buffer portion elongates along the assembly direction of the housing and the box cover;

[0022] The second buffer connector further includes buffer holes, the buffer holes and the strip holes are isolated by connecting ribs, and when the explosion-proof box changes from a sealed state to a depressurized state, the fastener can break through the connecting ribs and slide into the buffer holes.

[0023] Optionally, in the above explosion-proof box, it further includes a sealing ring, the box cover is provided with an annular groove for accommodating the sealing ring, and a sealing groove adapted to the outer periphery of the end of the box cover is formed in the sealing ring.

[0024] Optionally, in the above explosion-proof box, there are a plurality of the explosion-proof fastening assemblies, and all the explosion-proof fastening assemblies are sequentially distributed around the outer periphery of the box cover.

[0025] In the above technical solution, the explosion-proof box provided by the present application includes a housing, a box cover, and an explosion-proof fastening assembly. The box cover can be hermetically fastened to the opening position of the housing. The explosion-proof fastening assembly includes a buffer connecting member and a fastening member. One of the buffer connecting member and the fastening member is installed on the housing, and the other is installed on the box cover. When the explosion-proof box relieves pressure, after the fastening member is displaced, a pressure relief channel is formed between the housing and the box cover.

[0026] As can be seen from the above description, in the explosion-proof box provided by the present application, when the explosion-proof box relieves pressure, under the action of the strong pressure inside the explosion-proof box, the fastening member is driven to slide in the strip-shaped hole. During this process, the box cover and the housing move away from each other, playing a buffering role. However, under the action of the fastening member and the buffer connecting member, they do not completely bounce open, reducing damage to other devices and the human body. Therefore, the reliability of the explosion-proof box provided by the present application is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only the embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained according to the provided drawings.

[0028] Figure 1 It is a three-dimensional structure diagram of the first explosion-proof box provided by the embodiment of the present application;

[0029] Figure 2 It is a partial sectional view of the first explosion-proof box provided by the embodiment of the present application;

[0030] Figure 3 It is a structural schematic diagram of the first explosion-proof box provided by the embodiment of the present application in a pressure relief state;

[0031] Figure 4 It is a top view of the first explosion-proof box provided by the embodiment of the present application

[0032] Figure 5 It is a structural schematic diagram of the explosion-proof box provided by the embodiment of the present application in the horizontal assembly direction

[0033] Figure 6 For Figure 5 It is a structural schematic diagram of the explosion-proof box shown along the A-A direction;

[0034] Figure 7 For Figure 6 It is an enlarged view of part B of the explosion-proof box shown;

[0035] Figure 8 It is a front view of the second explosion-proof box provided by the embodiment of the present application;

[0036] Figure 9 is Figure 8 Schematic structural diagram of the explosion-proof box shown along the C-C direction;

[0037] Figure 10 is Figure 9 Enlarged view of part D of the explosion-proof box shown;

[0038] Figure 11 Schematic structural diagram of the specific structure of the third explosion-proof box provided by the embodiment of the present application;

[0039] Figure 12 is Figure 11 Enlarged view of part E of the explosion-proof box shown;

[0040] Figure 13 Schematic structural diagram of the first buffer connection member provided by the embodiment of the present application;

[0041] Figure 14 Schematic structural diagram of the second buffer connection member provided by the embodiment of the present application;

[0042] Figure 15 Three-dimensional structural diagram of the buffer connection member connected to the box cover provided by the embodiment of the present application;

[0043] Figure 16 is Figure 15 Front view of the buffer connection member connected to the box cover shown;

[0044] Wherein Figures 1 - 16 in:

[0045] 100 - box cover, 101 - cover body, 102 - side connection member;

[0046] 200 - housing;

[0047] 300 - explosion-proof fastening assembly, 301 - buffer connection member, 30101 - first end, 30102 - buffer part, 30103 - strip hole, 30104 - second end, 30105 - buffer hole, 30106 - connection rib, 302 - fastener;

[0048] 400 - explosion-proof chamber;

[0049] 500 - sealing ring;

[0050] 600 - pressure relief channel. Specific implementation manner

[0051] The core of the present application is to provide an explosion-proof box with improved reliability.

[0052] In order to enable those skilled in the art to better understand the technical solutions of the present application, the present application will be further described in detail below with reference to the drawings and embodiments.

[0053] As Figure 1 and Figure 2 shown, in a specific embodiment, the explosion-proof box provided by the specific embodiment of the present application includes a housing 200, a box cover 100, and an explosion-proof fastening assembly 300. The box cover 100 can be hermetically fastened to the opening position of the housing 200. Among them, an explosion-proof chamber 400 is formed in the inner cavity after the box cover 100 and the housing 200 are fastened.

[0054] To improve the connection stability, preferably, a plurality of explosion-proof fastening assemblies 300 are provided, and all the explosion-proof fastening assemblies 300 are sequentially distributed around the outer periphery of the box cover 100. More preferably, an explosion-proof fastening assembly 300 is provided on each corresponding side of the housing 200. To make the overall force tend to be uniform, preferably, the explosion-proof fastening assemblies 300 arranged around the outer periphery of the box cover 100 are sequentially equidistantly arranged.

[0055] As Figure 3 shown, a pressure relief channel 600 is formed between the housing 200 and the box cover 100. At this time, the explosion-proof chamber 400 is communicated with the chamber outside the housing 200. Among them, the chamber outside the housing 200 can be the environment where the atmosphere is located.

[0056] As Figures 4 - 8 shown, the explosion-proof fastening assembly 300 includes a buffer connector 301 and a fastener 302. One of the buffer connector 301 and the fastener 302 is installed on the housing 200, and the other is installed on the box cover 100. After the fastener 302 is displaced, a pressure relief channel 600 is formed between the housing 200 and the box cover 100.

[0057] Specifically, when the buffer connector 301 is installed on the housing 200, the fastener 302 is installed on the box cover 100. When a pressure relief channel 600 is formed between the housing 200 and the box cover 100, the displacement of the fastener 302 refers to the displacement of the fastener 302 relative to the housing 200.

[0058] When the buffer connector 301 is installed on the box cover 100, the fastener 302 is installed on the housing 200. When a pressure relief channel 600 is formed between the housing 200 and the box cover 100, the displacement of the fastener 302 refers to the displacement of the fastener 302 relative to the box cover 100.

[0059] To improve the assembly efficiency, when the buffer connector 301 is connected to the housing 200, the buffer connector 301 and the housing 200 are integrally formed. When the buffer connector 301 is connected to the box cover 100, the buffer connector 301 and the box cover 100 are integrally formed. Specifically, the fastener 302 can be a threaded fastener. For example, the fastener 302 is a bolt.

[0060] As Figure 13As shown, a strip-shaped hole 30103 is formed in the buffer connecting member 301. When the explosion-proof box relieves pressure, the fastener 302 slides along the strip-shaped hole 30103. At this time, the sliding refers to the relative movement between the buffer connecting member 301 and the strip-shaped hole 30103.

[0061] When the explosion-proof box is in use, the box cover 100 can be located at the upper part or the side part of the housing 200. The second end 30104 of the buffer connecting member 301 is a free end, and the length direction of the strip-shaped hole 30103 extends along the direction from the first end 30101 to the second end 30104 of the buffer connecting member 301. Specifically, the strip-shaped hole 30103 can be a linear strip-shaped hole body with the same width, or a curved hole body in a corrugated shape.

[0062] In a specific embodiment, when the box cover 100 and the housing 200 are in a normal locked state, the fastener 302 is located at the top end of the strip-shaped hole 30103. At this time, the explosion-proof chamber 400 of the explosion-proof box is in a normal use state without explosion, that is, a sealed state. As Figure 3 shown, when the explosion-proof chamber 400 bears the explosion pressure, the box cover 100 moves upward. At the same time, it drives the buffer connecting member 301 to move upward, that is, the strip-shaped hole 30103 moves upward. The box cover 100 moves upward by a certain stroke, and a pressure relief channel 600 is formed between the housing 200 and the box cover 100, so that the explosion pressure is relieved from the periphery of the housing 200 and the box cover 100, reducing the explosion pressure borne inside the housing 200, and thus achieving explosion protection.

[0063] Through the above description, it can be seen that in the explosion-proof box provided in the specific embodiment of the present application, when the explosion-proof box relieves pressure, under the action of the strong pressure inside the explosion-proof box, the fastener 302 is driven to slide in the strip-shaped hole 30103. During this process, the box cover 100 and the housing 200 move away from each other, playing a buffering role. However, under the action of the fastener 302 and the buffer connecting member 301, they are not completely bounced open, so that the explosion-proof box can effectively prevent the upper cover from flying out during an explosion, reducing the impact on other devices and the human body. Therefore, the reliability of the explosion-proof box provided by the present application is improved.

[0064] As Figures 9 - 13 shown, in a specific embodiment, a buffer portion 30102 is provided at the first end 30101 of the buffer connecting member 301. Specifically, the buffer portion 30102 can be stacked in a U shape or an S shape. When the explosion-proof box changes from the sealed state to the pressure relief state, the buffer portion 30102 elongates along the assembly direction of the housing 200 and the box cover 100. Specifically, the assembly direction is defined as: during an explosion, the direction in which the housing 200 and the box cover 100 initially separate without external force. Among them, this assembly direction can be the horizontal direction (as Figure 5 shown), the vertical direction perpendicular to the horizontal direction (as Figure 6As shown, or it is set at an acute angle to the horizontal direction with an inclined direction. In addition to being able to achieve stroke displacement, the buffer connection member 301 provided in this application also has a buffer function, effectively reducing the acting time of force and reducing the possibility of damage to the housing 200.

[0065] To facilitate the deformation of the buffer connection member 301, preferably, the buffer connection member 301 is a metal member. For example, the buffer connection member 301 can be an iron structure or a copper structure, etc.

[0066] As Figure 11 and Figure 12 As shown, specifically, when the explosion-proof box is in a sealed state, the buffer portions 30102 are in a stacked state. At this time, when the buffer portions 30102 are connected to the box cover 100.

[0067] In a specific embodiment, when the explosion-proof box is in a sealed state, the buffer portions 30102 can be located on the outer periphery of the housing 200. At this time, the buffer portions 30102 can be in contact with the outer side wall of the housing 200.

[0068] In another specific embodiment, when the explosion-proof box is in a sealed state, the buffer portions 30102 are in contact with the end face of the housing 200 or the end face of the box cover 100. Specifically, a sealing fit is formed by the contact of the buffer portions 30102 with the end face of the housing 200 or the end face of the box cover 100. Preferably, the buffer portions 30102 are arranged in a ring shape to improve the sealing performance of the contact position.

[0069] As Figure 14 As shown, in a specific embodiment, the buffer connection member 301 is further provided with buffer holes 30105. The buffer holes 30105 and the strip holes 30103 are isolated by connecting ribs 30106. When the explosion-proof box changes from a sealed state to a pressure relief state, the fastener 302 can break through the connecting ribs 30106 and slide into the buffer holes 30105. By providing the buffer holes 30105, when the explosion-proof box relieves pressure, when the fastener 302 moves to the end of the strip hole 30103, it can break through the connecting ribs 30106 and move further to further relieve pressure, reducing the risk of the box cover 100 flying out from the housing 200.

[0070] Specifically, as Figure 14 As shown, a plurality of buffer holes 30105 are provided. The plurality of buffer holes 30105 are arranged in sequence on the buffer connection member 301 along the assembly direction of the housing 200 and the box cover 100. By providing a plurality of buffer holes 30105, the risk of the box cover 100 flying out from the housing 200 is further reduced.

[0071] Of course, a plurality of explosion-proof fastening assemblies 300 are provided. At least one of the plurality of buffer connection members 301 is a first buffer connection member, and at least one is a second buffer connection member. That is, the explosion-proof box can be connected by two types of buffer connection members.

[0072] The first end 30101 of the first buffer connecting member is connected to the box cover 100 or the housing 200. The second end 30104 of the first buffer connecting member is a free end. The length direction of the strip-shaped hole 30103 extends along the direction from the first end 30101 to the second end 30104 of the first buffer connecting member. A buffer portion 30102 is provided at the first end 30101 of the first buffer connecting member. When the explosion-proof box changes from the sealed state to the pressure relief state, the buffer portion 30102 elongates along the assembly direction of the housing 200 and the box cover 100.

[0073] The second buffer connecting member further is provided with a buffer hole 30105. The buffer hole 30105 and the strip-shaped hole 30103 are arranged separately by a connecting rib 30106. When the explosion-proof box relieves pressure, the fastener 302 breaks through the connecting rib 30106. Specifically, when the explosion-proof box changes from the sealed state to the pressure relief state, the fastener 302 can break through the connecting rib 30106 and slide into the buffer hole 30105.

[0074] With such an arrangement, when the explosion-proof box performs a pressure relief operation, first, the first buffer is carried out by the buffer portion 30102 of the first buffer connecting member, the second buffer is carried out by the movement of the fastener 302 along the strip-shaped hole 30103, and the third buffer is carried out by the fastener 302 breaking through the connecting rib 30106, further reducing the risk of the box cover 100 flying out from the housing 200.

[0075] As Figure 7 and Figure 10 shown, in order to improve the sealing performance of the explosion-proof box, preferably, the explosion-proof box provided in the present application further includes a sealing ring 500. The box cover 100 is provided with an annular groove for accommodating the sealing ring 500. A sealing groove adapted to the outer periphery of the end of the box cover 100 is formed in the sealing ring 500. Specifically, the sealing ring 500 is a commutating and concave sealing member. When the explosion-proof box is in the sealed state, the sealing groove is inserted into the structure to be sealed. For example, if the sealing ring 500 is installed on the housing 200, the sealing groove is inserted into the box cover 100; if the sealing ring 500 is installed on the box cover 100, the sealing groove is inserted into the housing 200.

[0076] As Figure 10 shown, when the buffer portion 30102 is connected to the box cover 100, the sealing ring 500 can abut against the lower surface of the buffer portion 30102.

[0077] As Figure 15As shown, the box cover 100 includes a cover body 101 and a side connecting member 102. The side connecting member 102 is annular and is connected to the outer periphery of the cover body 101. The buffer connecting member 301 is connected to the side connecting member 102. Since the impact force on the cover body 101 is relatively large when the explosion-proof box relieves pressure, deformation may occur. By providing the side connecting member 102, the deformation at the connection position between the buffer connecting member 301 and the box cover 100 is reduced. At the same time, by providing the side connecting member 102 on the outer periphery of the cover body 101, the deformation of the cover body 101 is further reduced, and the service life of the explosion-proof box is extended.

[0078] As Figure 15 and Figure 16 shown, the first end 30101 of the buffer connecting member 301 is connected to the box cover 100 or the housing 200. For the convenience of assembling the internal structure of the housing 200, preferably, the buffer connecting member 301 is provided on the box cover 100.

[0079] With such a setting, the explosion-proof box provided by the present application meets the requirements in terms of support, installation, protection, sealing, etc. At the same time, compared with the explosion-proof method of adding an explosion-proof valve, not only the number of components is reduced, the reliability is improved, but also the overall structure is simple, which is convenient for processing and installation.

[0080] In this specification, the various embodiments are described in a progressive manner. Each embodiment focuses on the differences from other embodiments. The same or similar parts among the various embodiments can be referred to each other.

[0081] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present application. Various modifications to these embodiments will be obvious to those skilled in the art. The general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to these embodiments shown herein, but will be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. An explosion-proof box, characterized in that, Comprising: A housing (200); A box cover (100) which can be hermetically fastened to the opening position of the housing (200); An explosion-proof fastening assembly (300), the explosion-proof fastening assembly (300) includes a buffer connecting member (301) and a fastener (302), one of the buffer connecting member (301) and the fastener (302) is installed on the housing (200), and the other is installed on the box cover (100); when the explosion-proof box relieves pressure, after the fastener (302) is displaced, a pressure relief channel (600) is formed between the housing (200) and the box cover (100).

2. The explosion-proof box according to claim 1, wherein, A strip-shaped hole (30103) is formed in the buffer connecting member (301), and when the explosion-proof box relieves pressure, the fastener (302) slides along the strip-shaped hole (30103).

3. The explosion-proof box according to claim 2, characterized in that, The first end (30101) of the buffer connecting member (301) is connected to the box cover (100) or the housing (200), the second end (30104) of the buffer connecting member (301) is a free end, and the length direction of the strip-shaped hole (30103) extends along the direction from the first end (30101) to the second end (30104) of the buffer connecting member (301).

4. The explosion-proof box according to claim 3, characterized in that, The first end (30101) of the buffer connecting member (301) is provided with a buffer portion (30102); when the explosion-proof box changes from a sealed state to a pressure relief state, the buffer portion (30102) elongates along the assembly direction of the housing (200) and the box cover (100).

5. The explosion-proof box according to claim 4, characterized in that, When the explosion-proof box is in a sealed state, the buffer portions (30102) are in a stacked state.

6. The explosion-proof box according to claim 5, characterized in that, When the explosion-proof box is in a sealed state, the buffer portion (30102) abuts against the end face of the housing (200) or the end face of the box cover (100).

7. The explosion-proof box according to claim 3, characterized in that, The box cover (100) includes: A cover body (101); A side connecting member (102), the side connecting member (102) is annular and is connected to the outer periphery of the cover body (101), and the buffer connecting member (301) is connected to the side connecting member (102).

8. The explosion-proof box according to claim 2, wherein, The buffer connecting member (301) is further provided with buffer holes (30105), the buffer holes (30105) and the strip-shaped hole (30103) are isolated by connecting ribs (30106), and when the explosion-proof box relieves pressure, the fastener (302) breaks through the connecting ribs (30106).

9. The explosion-proof box according to claim 8, characterized in that, There are multiple buffer holes (30105), and the multiple buffer holes (30105) are sequentially arranged on the buffer connecting member (301) along the assembly direction of the housing (200) and the box cover (100).

10. The explosion-proof box according to claim 2, characterized in that, There are multiple explosion-proof fastening assemblies (300), at least one of the multiple buffer connecting members (301) is a first buffer connecting member, and at least one is a second buffer connecting member; The first end (30101) of the first buffer connecting member is connected to the box cover (100) or the housing (200), the second end (30104) of the first buffer connecting member is a free end, and the length direction of the strip-shaped hole (30103) extends along the direction from the first end (30101) to the second end (30104) of the first buffer connecting member; a buffer portion (30102) is provided at the first end (30101) of the first buffer connecting member. When the explosion-proof box changes from a sealed state to a pressure-relieving state, the buffer portion (30102) extends along the assembly direction of the housing (200) and the box cover (100). The second buffer connecting member further includes a buffer hole (30105). The buffer hole (30105) and the strip-shaped hole (30103) are separated by a connecting rib (30106). When the explosion-proof box changes from a sealed state to a pressure-relieving state, the fastener (302) can break through the connecting rib (30106) and slide into the buffer hole (30105).

11. The explosion-proof box according to claim 1, wherein, It further includes a sealing ring (500). The box cover (100) is provided with an annular groove for accommodating the sealing ring (500), and a sealing groove adapted to the outer periphery of the end of the box cover (100) is formed in the sealing ring (500).

12. The explosion-proof box according to any one of claims 1-11, characterized in that, A plurality of the explosion-proof fastening assemblies (300) are provided, and all the explosion-proof fastening assemblies (300) are sequentially distributed around the outer periphery of the box cover (100).

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