Shell explosion-proof device for low-temperature vacuum double-layer pressure vessel
By designing an automatic closing explosion-proof device on the shell of a low-temperature vacuum double-layer pressure vessel, the guide mechanism and spring are used to ensure that the explosion-proof cover plate can be resealed after pressure relief, solving the problem that conventional devices cannot be automatically closed and improving safety.
Patent Information
- Application Number
- CN202420193709.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-01-26
- Publication Date
- 2024-12-13
- Estimated Expiration
- 2034-01-26
AI Technical Summary
The explosion-proof device of a conventional low-temperature vacuum double-layer pressure vessel cannot be automatically closed after pressure relief, causing air in the interlayer space to enter and oxygen to liquefy into liquid oxygen, increasing the risk.
An explosion-proof device for housing including explosion-proof pipe, explosion-proof cover plate, cap and spring is designed. The explosion-proof cover plate can automatically re-cover the outer port of the explosion-proof tube after pressure relief through the guide mechanism and the connection mechanism, and use springs and cross-shaped ribs. The plates are sealed.
The explosion-proof cover plate can be automatically closed after pressure relief, preventing air from entering the mezzanine space, reducing the risk and ensuring the safety of the container.
Smart Images
Figure CN222164448U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to a low-temperature vacuum double-layer pressure container, in particular to an outer shell explosion-proof device used for the low-temperature vacuum double-layer pressure container. Background Art
[0002] The cryogenic vacuum double-layer pressure vessel consists of an inner cylinder and an outer cylinder. The inner cylinder is located in the outer cylinder. The interlayer between the inner cylinder and the outer cylinder will be evacuated for insulation. The inner cylinder is used to store liquefied cryogenic gas. A safety valve or bursting disc is provided on the inner cylinder as an overpressure relief device, and an explosion-proof device is generally provided on the outer cylinder. Its function is that when the inner cylinder ruptures and leaks, the pressure of the interlayer space, which was originally a vacuum, increases. At this time, the explosion-proof cover of the explosion-proof device on the outer cylinder will be opened to relieve the pressure on the interlayer, thereby protecting the outer cylinder from rupturing or even exploding due to high pressure.
[0003] The explosion-proof cover on a conventional explosion-proof device will fall off after being opened, making it impossible to reset the explosion-proof cover after the pressure relief is over and to re-seal the explosion-proof device. If the explosion-proof cover cannot be closed quickly, a large amount of air will enter the interlayer space. If the inner cylinder is loaded with cryogenic media such as liquid hydrogen or liquid helium, the oxygen in the air in the interlayer space will be liquefied into liquid oxygen. If the amount of liquid oxygen in the interlayer continues to increase, the flammability of the combustible material will continue to increase. Coupled with the flammable and explosive media such as liquid hydrogen leaking out of the inner cylinder, the danger will increase dramatically. Utility Model Content
[0004] The technical problem to be solved by the utility model is to provide an explosion-proof device for the outer shell of a low-temperature vacuum double-layer pressure vessel, which can automatically close the explosion-proof cover after the pressure relief is completed.
[0005] In order to solve the above problems, the technical solution adopted by the utility model is: an explosion-proof device for the outer shell of a low-temperature vacuum double-layer pressure vessel, comprising: an explosion-proof tube, an explosion-proof cover plate, and a cap. The inner end of the explosion-proof tube is used to be welded and fixedly sealed with the explosion-proof port on the outer cylinder, so that the explosion-proof tube is connected with the interlayer between the outer cylinder and the inner cylinder through the explosion-proof port. The explosion-proof cover plate is sealed on the outer port of the explosion-proof tube. A sealing ring is used to seal between the explosion-proof cover plate and the outer port of the explosion-proof tube. The cap is covered on the outer side of the outer port of the explosion-proof tube, and the cap is connected and supported with the explosion-proof tube through a connecting mechanism. The cap and the explosion-proof tube and the explosion-proof cover plate are all connected. A gap is left, and the feature is that: a spring is arranged between the cover cap and the explosion-proof cover plate, a positioning groove for inserting the lower end of the spring is arranged at the center of the explosion-proof cover plate, the upper end of the spring is abutted against the center of the cover cap, the lower end of the spring is inserted into the positioning groove and abutted against the explosion-proof cover plate, a rib plate is welded in the inner port of the explosion-proof pipe, and a guide mechanism is arranged between the rib plate and the explosion-proof cover plate, when the inner cylinder leaks and causes the interlayer gas pressure to increase and the explosion-proof cover plate is opened to relieve pressure, the guide mechanism can vertically guide the explosion-proof cover plate, and after the pressure is unloaded, the explosion-proof cover plate can be covered back on the outer port of the explosion-proof pipe under the action of the spring.
[0006] Furthermore, in the aforementioned shell explosion-proof device for a low-temperature vacuum double-layer pressure vessel, the rib plate is a cross-shaped rib plate.
[0007] Furthermore, the aforementioned shell explosion-proof device for a low-temperature vacuum double-layer pressure vessel, wherein: the structure of the connecting mechanism is: a circle of annular grooves is provided on the outer wall of the explosion-proof tube, and a plurality of locking bolts arranged around the explosion-proof tube are threadedly connected on the cap, and after each locking bolt is screwed into its top end and stuck in the annular groove, the cap can be connected and supported to the explosion-proof tube.
[0008] Furthermore, the aforementioned shell explosion-proof device for a low-temperature vacuum double-layer pressure vessel, wherein: the structure of the guide mechanism includes: a guide column and a guide rod, a vertically arranged guide groove is provided on the guide column, the guide rod is inserted into the guide groove, the guide column is fixed to the center of the explosion-proof cover plate, the guide rod is fixed to the center of the rib plate, the guide groove can circumferentially limit the guide rod so that the guide rod cannot rotate in the guide groove, but the guide groove can vertically guide the guide rod.
[0009] Furthermore, in the aforementioned shell explosion-proof device for a low-temperature vacuum double-layer pressure vessel, the upper end of the spring is welded and fixed to the center of the cap.
[0010] The advantages of the utility model are as follows: in the shell explosion-proof device, when the inner cylinder leaks and causes the interlayer gas pressure to increase and the explosion-proof cover is opened to release the pressure, the guide mechanism can vertically guide the explosion-proof cover so that the explosion-proof cover will not fall off after opening; after the pressure is released, the explosion-proof cover can be covered back on the outer port of the explosion-proof pipe under the action of the spring, thereby sealing the outer port of the explosion-proof pipe again. BRIEF DESCRIPTION OF THE DRAWINGS
[0011] Figure 1 The utility model is a schematic structural diagram of the shell explosion-proof device for a low-temperature vacuum double-layer pressure vessel.
[0012] Figure 2 It is a schematic diagram of the structure of the guide column and the guide rod. DETAILED DESCRIPTION
[0013] The present invention will be described in further detail below in conjunction with specific embodiments and accompanying drawings.
[0014] like Figure 1 As shown, an explosion-proof device for an outer shell of a low-temperature vacuum double-layer pressure vessel comprises: an explosion-proof tube 1, an explosion-proof cover plate 2, and a cap 3. The inner end of the explosion-proof tube 1 is used to be welded and fixedly sealed with the explosion-proof port on the outer cylinder 4, so that the explosion-proof tube 1 is connected with the interlayer 5 between the outer cylinder and the inner cylinder through the explosion-proof port. The explosion-proof cover plate 2 is sealed on the outer port of the explosion-proof tube 1. The explosion-proof cover plate 2 and the outer port of the explosion-proof tube 1 are sealed with a sealing ring. The cap 3 covers the outer side of the outer port of the explosion-proof tube 1, and the cap 3 is connected and supported with the explosion-proof tube 1 through a connecting mechanism. There are gaps between the cap 3 and the explosion-proof tube 1 and the explosion-proof cover plate 2. A spring 6 is arranged between the cap 3 and the explosion-proof cover plate 2. A positioning groove 7 for inserting the lower end of the spring 6 is provided at the center of the explosion cover 2, the upper end of the spring 6 is welded and fixed to the center of the cap 3, the lower end of the spring 6 is inserted into the positioning groove 7 and abuts against the explosion-proof cover 2, a rib plate 8 is welded in the inner port of the explosion-proof tube 1, and a guide mechanism is provided between the rib plate 8 and the explosion-proof cover 2. When the inner cylinder leaks and causes the interlayer gas pressure to increase and the explosion-proof cover 2 is opened to relieve the pressure, the guide mechanism can vertically guide the explosion-proof cover 2 so that the explosion-proof cover 2 will not fall off after opening. After the pressure is relieved, under the action of the spring 6, the explosion-proof cover 2 can cover the outer port of the explosion-proof tube 1 again, thereby sealing the outer port of the explosion-proof tube 1 again.
[0015] In this embodiment, the rib plate 8 is a cross-shaped rib plate, which can make the guide mechanism more stable.
[0016] The structure of the connecting mechanism is as follows: a circle of annular grooves 9 are provided on the outer wall of the explosion-proof tube 1, and a plurality of locking bolts 10 arranged around the explosion-proof tube 1 are threadedly connected on the cover cap 3. After each locking bolt 10 is screwed into its top end and stuck in the annular groove 9, the cover cap 3 can be connected and supported with the explosion-proof tube 1.
[0017] like Figure 2 As shown, the structure of the guide mechanism includes: a guide column 11 and a guide rod 12, a vertically arranged guide groove 13 is provided on the guide column 11, the guide rod 12 is inserted into the guide groove 13, the guide column 11 is fixed to the center of the explosion-proof cover plate 2, the guide rod 12 is fixed to the center of the rib plate 8, the guide groove 13 can circumferentially limit the guide rod 12, so that the guide rod 12 cannot rotate in the guide groove 13, but the guide groove 13 can vertically guide the guide rod 12. In this embodiment, the contours of the guide groove 13 and the guide rod 12 are not circular, so that the guide rod 12 cannot rotate in the guide groove 13.
Claims
1. Shell explosion-proof device for low-temperature vacuum double-layer pressure vessel, including: The explosion-proof pipe, explosion-proof cover plate and cover cap are used to weld and seal the inner end of the explosion-proof pipe with the explosion-proof opening on the outer cylinder body, so that the explosion-proof pipe is connected with the interlayer between the outer cylinder body and the inner cylinder body through the explosion-proof opening. The explosion-proof cover plate is sealed on the outer port of the explosion-proof pipe. The explosion-proof cover plate and the outer port of the explosion-proof pipe are sealed with a sealing ring. The cover cap is covered on the outer side of the outer port of the explosion-proof pipe, and the cover cap is connected and supported with the explosion-proof pipe through a connecting mechanism. There is a gap between the cover cap and the explosion-proof pipe and the explosion-proof cover plate. The invention is characterized in that: a hole is set between the cover cap and the explosion-proof cover plate. There is a spring, and a positioning groove for inserting the lower end of the spring is arranged at the center of the explosion-proof cover, the upper end of the spring is abutted against the center of the cap, the lower end of the spring is inserted into the positioning groove and abuts against the explosion-proof cover, a rib plate is welded in the inner port of the explosion-proof pipe, and a guide mechanism is arranged between the rib plate and the explosion-proof cover, when the inner cylinder leaks and causes the interlayer gas pressure to increase and the explosion-proof cover is opened to relieve the pressure, the guide mechanism can vertically guide the explosion-proof cover, and after the pressure is relieved, the explosion-proof cover can be covered back on the outer port of the explosion-proof pipe under the action of the spring.
2. The shell explosion-proof device for a low-temperature vacuum double-layer pressure vessel according to claim 1, characterized in that: The rib plate is a cross-shaped rib plate.
3. The shell explosion-proof device for a low-temperature vacuum double-layer pressure vessel according to claim 1 or 2, characterized in that: The structure of the connecting mechanism is as follows: a circle of annular grooves is provided on the outer wall of the explosion-proof tube, and a plurality of locking bolts arranged around the explosion-proof tube are threadedly connected on the cover cap. After each locking bolt is screwed into the annular groove until its top end is stuck in the annular groove, the cover cap can be connected and supported to the explosion-proof tube.
4. The shell explosion-proof device for a low-temperature vacuum double-layer pressure vessel according to claim 1 or 2, characterized in that: The structure of the guide mechanism includes: a guide column and a guide rod. A vertically arranged guide groove is provided on the guide column. The guide rod is inserted into the guide groove. The guide column is fixed to the center of the explosion-proof cover plate, and the guide rod is fixed to the center of the rib plate. The guide groove can limit the guide rod circumferentially so that the guide rod cannot rotate in the guide groove, but the guide groove can guide the guide rod vertically.
5. The shell explosion-proof device for a low-temperature vacuum double-layer pressure vessel according to claim 1 or 2, characterized in that: The upper end of the spring is welded and fixed to the center of the cap.