Explosion-proof device

Abstract

The explosion-proof device comprises a connecting shell ring, a rigid supporting ring, a filtering assembly, a fixing assembly, a sealing cover, a connecting flange and an O-shaped sealing ring, and the connecting shell ring is provided with a containing cavity with an opening; the rigid supporting ring is connected to the containing cavity, the filtering assembly is supported by the rigid supporting ring, and holes of the filtering assembly allow gas in the containing cavity to penetrate through so as to achieve pressure relief and limit powder particles to penetrate out of the sub-cavities; the fixing assembly is used for fixing the filtering assembly to the rigid supporting ring, the sealing cover seals the opening, the connecting flange is arranged at the opening of the connecting shell ring, and the O-shaped sealing ring abuts against the position between the sealing cover and the connecting flange. The filtering assembly is arranged in the connecting shell ring, so that the connecting shell ring can be used for preventing internal powder particles from leaking outwards during explosion prevention and pressure relief, or preventing the powder particles from leaking outwards to prevent traffic accidents from happening again when internal vacuum of the connecting shell ring suddenly fails during transportation of the connecting shell ring; therefore, the safety performance of the explosion-proof device is improved.

Description

Technical Field

[0001] The invention relates to the technical field of cold boxes, and in particular to an explosion-proof device. Background Art

[0002] When a traditional vacuum powder insulated cold box experiences an emergency depressurization during operation, it cannot prevent the vacuum powder insulation material inside the cold box from spraying outward. When the internal vacuum of the cold box fails suddenly during transportation (for example, due to quality problems in the welding of the cold box shell or a traffic accident), it cannot prevent the vacuum powder insulation material from leaking outward and causing secondary traffic accidents, resulting in poor safety performance. Summary of the invention

[0003] The main technical problem solved by the present application is to provide an explosion-proof device that can solve the problem of poor safety performance of an insulated cold box.

[0004] In order to solve the above technical problems, a technical solution adopted in this application is to provide an explosion-proof device, including:

[0005] The connecting cylinder section is provided with a receiving cavity having an opening;

[0006] A rigid support ring is disposed in the connecting cylinder section and is connected to the cavity wall of the accommodating cavity in a surrounding manner;

[0007] A filter assembly is detachably disposed in the accommodating chamber, the filter assembly is supported by the rigid support ring, and a sub-chamber for accommodating powder particles is formed between the filter assembly and the bottom wall of the accommodating chamber, and the holes on the filter assembly are configured to allow gas in the accommodating chamber to pass through to achieve pressure relief, and to restrict the powder particles from passing through the sub-chamber;

[0008] A fixing assembly is detachably disposed in the accommodating cavity, and the fixing assembly is used to fix the filter assembly on the rigid support ring;

[0009] A sealing cover, sealing the opening of the accommodating cavity;

[0010] A connecting flange is arranged at the opening of the connecting barrel section and is fixedly connected to the connecting barrel section;

[0011] An O-type sealing ring is held between the sealing cover and the connecting flange, and the O-type sealing ring is configured to achieve self-sealing of the connecting cylinder under the action of an external vacuum device.

[0012] Beneficial effects: The present application arranges a filter assembly in the connecting cylinder section, so that the connecting cylinder section can be used to prevent internal powder particles from leaking out during explosion-proof pressure relief, or when the internal vacuum of the connecting cylinder section suddenly fails during transportation (such as due to welding quality problems of the connecting cylinder section or traffic accident collision), powder particles are prevented from leaking out to prevent traffic accidents from happening again, thereby improving the safety performance of the explosion-proof device; at the same time, a rigid support ring and a fixing assembly are arranged in the connecting cylinder section to provide support for the filter assembly and limit the position of the filter assembly in the connecting cylinder section, thereby improving the stability of the filter assembly. The detachable fixing assembly also enables the filter assembly to have the function of free disassembly and replacement, thereby satisfying the subsequent filling and replacement of powder particles in the connected connecting cylinder section. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work. Among them:

[0014] Figure 1 A schematic diagram of the structure of an explosion-proof device provided in one embodiment of the present application;

[0015] Figure 2 for Figure 1 Enlarged view of part II;

[0016] Figure 3 for Figure 1 Enlarged view of part III;

[0017] Figure 4 A schematic diagram of the structure of a hole plate provided in one embodiment of the present application;

[0018] Figure 5 A schematic diagram of the structure of a semicircular arc pressure plate provided in one embodiment of the present application. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0020] The terms "first", "second", "third" in this application are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features. Thus, the features defined as "first", "second", "third" can expressly or implicitly include at least one of the features. In the description of this application, the meaning of "multiple" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined. In the embodiments of this application, all directional indications (such as up, down, left, right, front, back...) are only used to explain the relative position relationship, movement, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication also changes accordingly. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions. For example, a process, method, system, product or device comprising a series of steps or units is not limited to the steps or units listed, but optionally also includes steps or units that are not listed, or optionally also includes other steps or units inherent to these processes, methods, products or devices.

[0021] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0022] Please also read Figure 1 , Figure 2 and Figure 3 In one embodiment of the present application, an explosion-proof device 100 is provided, comprising a connecting barrel section 10, a rigid support ring 20, a filter assembly 30, a fixing assembly 40, a sealing cover 50, a connecting flange 60 and an O-ring 70, wherein the connecting barrel section 10 is used to store powder particles (not shown), and the sealing cover 50 is covered on the connecting barrel section 10, and a vacuum environment is formed between the connecting barrel section 10 and the sealing cover 50 under the action of an external vacuum pumping device. The rigid support ring 20, the filter assembly 30 and the fixing assembly 40 are arranged in the connecting barrel section 10, and the rigid support ring 20 and the fixing assembly 40 cooperate to fix the position of the filter assembly 30 in the connecting barrel section 10, so that the powder particles are confined between the filter assembly 30 and the bottom of the connecting barrel section 10.

[0023] Specifically, the connecting barrel section 10 is provided with a receiving chamber 12 having an opening 11 , and the sealing cover 50 covers the opening 11 of the receiving chamber 12 .

[0024] The connecting cylinder section 10 is used as the main structure of the cold box to contain the powder particles, thereby improving the stability and safety of the powder particles during transportation or handling. The sealing cover 50 is responsible for sealing the opening 11 of the accommodating chamber 12, which can reduce the risk of external heat and moisture intruding into the accommodating chamber 12, thereby improving the sealing performance of the explosion-proof device 100.

[0025] The connecting flange 60 is disposed at the opening 11 of the connecting barrel section 10 and is fixedly connected to the connecting barrel section 10. An O-ring 70 is held between the sealing cover 50 and the connecting flange 60, and the O-ring 70 is configured to achieve self-sealing of the connecting barrel section 10 under the action of an external vacuum device (not shown).

[0026] After the sealing cover 50 is covered on the opening 11 of the accommodating chamber 12, the external vacuum pumping device vacuumizes the connecting barrel section 10, so that the stability of the powder particles in the accommodating chamber 12 is protected by vacuuming between the connecting barrel section 10 and the sealing cover 50. At the same time, the external vacuum pumping device can also make the sealing cover 50 further abut against the O-type sealing ring 70 to seal the opening 11, and realize the self-sealing of the internal environment of the connecting barrel section 10 without bolt connection. At the same time, the O-type sealing ring 70 can also automatically fail to seal when the vacuum in the connecting barrel section 10 fails, thereby improving the internal pressure explosion-proof sensitivity of the explosion-proof device 100.

[0027] The rigid support ring 20 is disposed in the connecting barrel section 10, and the rigid support ring 20 is connected to the cavity wall of the accommodating cavity 12. The filter assembly 30 is detachably disposed in the accommodating cavity 10 and supported by the rigid support ring 20. A sub-cavity 13 for accommodating powder particles is formed between the filter assembly 30 and the bottom wall of the accommodating cavity 12. The holes on the filter assembly 30 are configured to allow the gas in the accommodating cavity 12 to pass through to achieve pressure relief, and to limit the powder particles from passing through the sub-cavity 13. The fixing assembly 40 is detachably disposed in the accommodating cavity 10, and is used to fix the filter assembly 30 on the rigid support ring 20.

[0028] The rigid support ring 20 provides support for the filter assembly 30, so that the filter assembly 30 can be stably installed at a predetermined position in the connecting cylinder section 10. It can be understood that the rigid support ring 20 needs to have a certain thickness of rigidity, and only the lower surface end of the rigid support ring 20 is intermittently welded to the inner wall of the connecting cylinder section 10, and the upper surface of the rigid support ring 20 after welding needs to maintain a certain level and flatness.

[0029] In this embodiment, the rigid support ring 20 is welded to the inner wall of the connecting barrel section 10. In other embodiments, the rigid support ring 20 may also be fixedly connected to the inner wall of the connecting barrel section 10 in other ways, which are not limited here.

[0030] The holes on the filter assembly 30 are arranged so that the holes have the function of filtering powder particles, so that when the connecting cylinder 10 undergoes explosion-proof pressure relief, the powder particles leak out, or when the internal vacuum of the connecting cylinder section 10 suddenly fails during transportation (for example, due to welding quality problems of the connecting cylinder 10 or traffic accident collision), the powder particles are prevented from leaking out and traffic accidents are prevented from happening again, thereby improving the safety performance of the explosion-proof device 100.

[0031] The fixing assembly 40 is used to firmly fix the filter assembly 30 on the rigid support ring 20, reducing the risk of displacement of the filter assembly 30 during vacuum operation, thereby improving the stability of the filter assembly 30 in the connecting barrel section 10. At the same time, the setting of the fixing assembly 40 also enables the filter assembly 30 to have the function of free disassembly and replacement, thereby meeting the filling and replacement of powder particles inside the connected connecting barrel section 10 in the subsequent process.

[0032] In actual use, firstly, the powder particles are placed in the accommodating cavity 12, and then the filter assembly 30 is placed on the rigid support ring 20, ensuring that the filter assembly 30 completely covers the holes on the rigid support ring 20. Next, the filter assembly 30 is firmly fixed on the rigid support ring 20 using the fixing assembly 40. Finally, the sealing cover 50 is placed on the opening 11 of the connecting barrel section 10, so that the O-ring 70 can be held between the sealing cover 50 and the connecting flange 60, and the connecting barrel section 10 is evacuated using an external vacuum device, thereby maintaining the vacuum state in the connecting barrel section 10.

[0033] Please also read Figure 1 and Figure 2 In one embodiment, an annular groove 61 is provided on the end surface of the connecting flange 60, and an O-ring 70 is provided in the annular groove 61. An O-ring 70 is provided in the annular groove 61, and the O-ring 70 abuts against the connecting flange 60 and the sealing cover 50. Through the above arrangement, the explosion-proof device 100 makes full use of the self-sealing characteristics of the O-ring 70 under vacuum conditions, so that the O-ring 70 can fill the small gap between the connecting flange 60 and the sealing cover 50 through compression deformation, thereby improving the sealing performance of the connecting barrel section 10, thereby ensuring the stability and safety of the internal environment of the connecting barrel section 10. At the same time, the annular groove 61 provides support for the O-ring 70, reducing the risk of displacement or falling off of the O-ring 70 during use.

[0034] Please continue reading Figure 1 and Figure 2 In one embodiment, the sealing cover 50 is provided with a convex shoulder 51 which is clearance-matched with the inner wall of the connecting flange 60 at a position close to the opening 11. With the above arrangement, the sealing performance between the sealing cover 50 and the connecting flange 60 can be improved.

[0035] It is understandable that the wall thickness of the sealing cover 50 should not be set too thick, and only needs to meet the vacuum external pressure calculation.

[0036] In one embodiment, the connection flange 60 is connected to the connection barrel section 10 by welding. In other embodiments, the connection flange 60 and the connection barrel section 10 may also be fixedly connected by bolts or other methods, which are not limited here.

[0037] Please also read Figure 1 and Figure 3 In one embodiment, the filter assembly 30 includes two orifice plates 31 and a wire mesh 32 sandwiched between the two orifice plates 31. One of the orifice plates 31 is supported by the rigid support ring 20, and the other orifice plate 31 is pressed against the side of the wire mesh 32 away from the rigid support ring 20. Through the above arrangement, the wire mesh 32 is pressed between the two orifice plates 31, and the orifice plates 31 can be used to protect the wire mesh 32 from being damaged by the impact of powder particles, thereby improving the stability of the wire mesh 32 and also improving the life of the wire mesh 32.

[0038] Please continue reading Figure 1 and Figure 3 In one embodiment, the orifice plate 31 is provided with a plurality of first filter holes 311 arranged at intervals, and the wire mesh 32 is provided with a plurality of second filter holes (not shown) arranged at intervals, wherein the mesh of the second filter holes is smaller than the diameter of the powder particles, and the mesh of the first filter holes 311 is greater than or equal to the mesh of the second filter holes. Through the first filter holes 311 and the second filter holes, when the connection cylinder section 10 fails in vacuum during transportation or handling, the first filter holes 311 and the second filter holes can allow the depressurized gas to pass through, and at the same time, the risk of powder particles passing through the first filter holes 311 and the second filter holes under the action of internal pressure and leaking outward can be reduced, thereby improving the safety performance of the explosion-proof device 100.

[0039] In one embodiment, the aperture conversion area of ​​the orifice plate 31 and the wire mesh 32 is greater than or equal to the pressure relief area required for emergency pressure relief of the connecting cylinder segment 10 or the external pipeline connected to the connecting cylinder segment 10. Through the above arrangement, the orifice plate 31 and the wire mesh 32 can fully meet the purpose of the pressure relief gas passing through.

[0040] In one embodiment, the orifice plate 31 and the wire mesh 32 are both circular structures. It is understandable that, according to the structure of the connecting cylinder section 10, the orifice plate 31 and the wire mesh 32 can also be set to other shapes, which are not limited here.

[0041] Please also read Figure 3 and Figure 4In one embodiment, each orifice plate 31 includes two first plate portions 312 and second plate portions 313 spliced ​​together, a first plug-in structure 314 is provided on the side of the first plate portion 312, and a second plug-in structure 315 is provided on the side of the second plate portion 313, and the first plate portion 312 and the second plate portion 313 are plugged together through the first plug-in structure 314 and the second plug-in structure 315. The first plug-in structure 314 is a flange, and the second plug-in structure 315 is a groove for receiving the flange.

[0042] Specifically, when the first plate portion 312 and the second plate portion 313 are spliced, the flange of the first plug-in structure 314 is inserted into the groove of the second plug-in structure 315, so as to achieve the plug-in fit of the first plate portion 312 and the second plate portion 313. The provision of the plug-in structure enables the first plate portion 312 and the second plate portion 313 to form a stronger structural support at the connection, so that the orifice plate 31 can withstand greater pressure and impact force, thereby improving the structural strength of the orifice plate 31.

[0043] At the same time, when the orifice plate 31 needs to be disassembled or replaced, it is only necessary to separate the plug-in fit of the flange and the groove, thereby improving the disassembly efficiency of the orifice plate 31 .

[0044] In one embodiment, the size, shape or quantity of the first plug-in structure 314 and the second plug-in structure 315 can be set according to actual needs and is not limited here.

[0045] In one embodiment, both the first plate portion 312 and the second plate portion 313 are semicircular structures.

[0046] In other embodiments, the orifice plate 31 may also be an integrally formed structure.

[0047] Please refer again Figure 1 and Figure 3 In one embodiment, the fixing assembly 40 includes a rigid pressing ring 41 and a fixing member 42, and the rigid pressing ring 41 is pressed on the side of the filter assembly 30 away from the rigid support ring 20. The fixing member 42 is arranged on the side of the rigid pressing ring 41 away from the filter assembly 30, and the fixing member 42 is configured to hold the rigid pressing ring 41 in the direction of the filter assembly 30. Through the above arrangement, the rigid pressing ring 41 is used to hold the filter assembly 30, and the fixing member 42 firmly presses the rigid pressing ring 41 on the filter assembly 30 through the pre-tightening force, thereby improving the stability of the filter assembly 30 in the connecting barrel section 10.

[0048] At the same time, the fixing member 42 also makes the installation and removal process of the entire filter assembly 30 more convenient. By adjusting the tightness of the fixing member 42, the operator can achieve the tightening and release of the filter assembly 30, thereby meeting different operating requirements.

[0049] Please also read Figure 1 , Figure 3 and Figure 5 In one embodiment, the rigid pressure ring 41 includes two semicircular arc pressure plates 411 spliced ​​together. Through the above arrangement, the two arc-shaped semicircular arc pressure plates 411 enable the rigid pressure ring 41 to evenly distribute the force when applying pressure to the filter assembly 30, thereby reducing the risk of damage to the filter assembly 30 caused by excessive local pressure.

[0050] In one embodiment, the shape of the semicircular arc pressure plate 411 can also be customized according to the size and shape of the filter assembly 30 to improve the stability of the rigid pressure ring 41 when it is pressed against the filter assembly 30.

[0051] In other embodiments, the rigid pressure ring 41 may also be an integrally formed structure, which is not limited here.

[0052] Please refer again Figure 1 and Figure 3 In one embodiment, the fixing member 42 includes a fixing seat 421 and a clamping bolt 422. There are at least two fixing seats 421, each of which is arranged on the side of the rigid pressure ring 41 away from the filter assembly 30, and two adjacent fixing seats 421 are arranged at intervals on the cavity wall of the connecting barrel section 10. There are at least two clamping bolts 422, each of which is arranged in a one-to-one correspondence with the fixing seat 421, and the clamping bolt 422 is configured to pass through the fixing seat 421 to abut against the rigid pressure ring 41. Through the above arrangement, each clamping bolt 422 is configured to pass through the fixing seat 421 to abut against the rigid pressure ring 41, thereby achieving the tightening of the rigid pressure ring 41, thereby indirectly improving the stability of the filter assembly 30 in the connecting barrel section 10.

[0053] In one embodiment, the clamping bolt 422 is a hexagonal bolt, and the clamping bolt 422 clamps the orifice plate 31 and the wire mesh 32 by clamping the semicircular arc pressure plate 411. The arrangement and number of the clamping bolts 422 must meet the uniform force and clamping requirements of the semicircular arc pressure plate 411.

[0054] See also Figure 1 In one embodiment, the explosion-proof device 100 further includes a protective cover 80, which is disposed on the sealing cover 50 and is fixedly connected to the connecting flange 60. Through the above arrangement, the protective cover 80 can provide additional protection for the sealing cover 50. For example, when the sealing cover 50 is separated from the connecting flange 60 due to the pressure relief gas in the connecting cylinder section 10, the connecting flange 60 can reduce the risk of the sealing cover 50 falling from a high altitude. At the same time, the protective cover 80 can also enhance the external structural strength of the entire explosion-proof device 100, and can play a waterproof and dustproof effect.

[0055] In one embodiment, the protective cover 80 is fixedly connected to the connecting flange 60 by fixing bolts 90, thereby improving the stability of the protective cover 80 and reducing the risk of displacement or falling off of the protective cover 80, thereby improving the product reliability of the explosion-proof device 100. The protective cover 80 can also be used to prevent the sealing cover 50 from falling from a high altitude (such as when the vacuum of the connecting cylinder 10 fails or the internal explosion-proof pressure relief of the connecting cylinder 10 is urgent), and the protective cover 80 also has the characteristics of rainproof and dustproof functions, thereby extending the service life of the O-ring 70.

[0056] The above are only implementation methods of the present application, and are not intended to limit the patent scope of the present application. Any equivalent structure or equivalent process transformation made using the contents of the present application specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present application.

Claims

1. An explosion-proof device, characterized in that: include: The connecting cylinder section is provided with a receiving cavity having an opening; A rigid support ring is disposed in the connecting cylinder section and is connected to the cavity wall of the accommodating cavity in a surrounding manner; A filter assembly is detachably disposed in the accommodating chamber, the filter assembly is supported by the rigid support ring, and a sub-chamber for accommodating powder particles is formed between the filter assembly and the bottom wall of the accommodating chamber, and the holes on the filter assembly are configured to allow gas in the accommodating chamber to pass through to achieve pressure relief, and to restrict the powder particles from passing through the sub-chamber; A fixing assembly is detachably disposed in the accommodating cavity, and the fixing assembly is used to fix the filter assembly on the rigid support ring; A sealing cover, sealing the opening of the accommodating cavity; A connecting flange is arranged at the opening of the connecting barrel section and is fixedly connected to the connecting barrel section; An O-type sealing ring is held between the sealing cover and the connecting flange, and the O-type sealing ring is configured to achieve self-sealing of the connecting cylinder under the action of an external vacuum device.

2. The explosion-proof device according to claim 1, characterized in that: The filter assembly includes two orifice plates and a wire mesh sandwiched between the two orifice plates, wherein one of the orifice plates is supported by the rigid support ring, and the other orifice plate is pressed onto a side of the wire mesh away from the rigid support ring.

3. The explosion-proof device according to claim 2, characterized in that: Each of the orifice plates comprises a first plate portion and a second plate portion which are spliced ​​together, a first plug-in structure is provided on the side of the first plate portion, a second plug-in structure is provided on the side of the second plate portion, and the first plate portion and the second plate portion are plugged together through the first plug-in structure and the second plug-in structure; The first plug-in structure is a flange, and the second plug-in structure is a groove for receiving the flange.

4. The explosion-proof device according to claim 2, characterized in that: The opening rate conversion area of ​​the orifice plate and the wire mesh is greater than or equal to the pressure relief area required for emergency pressure relief of the connecting cylinder section or an external pipeline connected to the connecting cylinder section.

5. The explosion-proof device according to claim 1, characterized in that: The fixing assembly comprises: A rigid pressing ring, pressed on a side of the filter assembly away from the rigid supporting ring; The fixing member is arranged on a side of the rigid pressing ring away from the filter assembly, and the fixing member is configured to hold the rigid pressing ring in a direction toward the filter assembly.

6. The explosion-proof device according to claim 5, characterized in that: The fixing member comprises: There are at least two fixing seats, each of which is arranged on a side of the rigid pressure ring away from the filter assembly, and two adjacent fixing seats are arranged at intervals on the cavity wall of the connecting cylinder section; There are at least two clamping bolts, each of which is arranged in one-to-one correspondence with the fixing seat, and the clamping bolt is configured to pass through the fixing seat to resist the rigid pressure ring.

7. The explosion-proof device according to claim 5, characterized in that: The rigid pressing ring comprises two semicircular arc pressing plates spliced ​​together.

8. The explosion-proof device according to claim 1, characterized in that: An annular groove is provided on the end surface of the connecting flange, and the O-ring is arranged in the annular groove.

9. The explosion-proof device according to claim 1, characterized in that: The sealing cover is provided with a convex shoulder portion at a position close to the opening and matching with the inner wall of the connecting flange with a clearance.

10. The explosion-proof device according to claim 9, characterized in that: The explosion-proof device also includes: A protective cover is arranged on the sealing cover and is fixedly connected to the connecting flange.

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