Multifunctional cold box overpressure protection device
通过设计多功能冷箱超压保护装置,利用盖板和连接件的预设重量实现自动泄压,并在填充珠光砂时利用排气筒作为填充口,解决了小型空分冷箱顶部空间有限 The problem of overpressure protection and material saving effect is achieved.
Patent Information
- Application Number
- CN202421286464.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-05
- Publication Date
- 2025-02-14
- Estimated Expiration
- 2034-06-05
AI Technical Summary
The limited headspace of the small empty cold box is caused by the difficulty of setting up the safety valve and pearlescent sand filling port, and the risk of overpressure damage.
Design a multi-functional cold box overpressure protection device, including an exhaust cylinder, a cover plate and a connector, which has a preset weight and can automatically open or cover the exhaust when the positive pressure in the cold box changes. The top of the barrel achieves overpressure protection, and the cover plate can be removed when filled with pearlescent sand, using the exhaust cylinder as the filling port.
The overpressure protection function of the cold box is realized, while reducing the occupation of the cold box head space, reducing material and construction costs, and improving the safety and use efficiency of the cold box.
Smart Images
Figure CN222479551U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of cold boxes, in particular to a multifunctional cold box overpressure protection device. Background Art
[0002] The cold box is one of the key equipment of the air separation unit. In the separation process of the product raw material mixed gas, low temperature separation is a method that must be adopted in all processes. The cold box is one of the main equipment for low temperature separation. The cold box mainly consists of two parts: one is a huge steel shell insulation box, and the other is the internal core aluminum plate-fin heat exchanger and fractionation tower. At the same time, the cold box is filled with pearl sand insulation material to ensure the cold box's cooling effect.
[0003] In order to prevent moist air from entering the cold box and causing the pearl sand to get damp and affect the insulation effect, the cold box is filled with nitrogen at a pressure of about 500Pa as a sealing gas to maintain a slightly positive pressure environment in the cold box. In special circumstances such as misoperation, the cold box is at risk of overpressure damage, so a safety valve is usually installed on the top of the cold box to protect the safety of the cold box device. In addition, in order to facilitate the filling of pearl sand into the cold box, a pearl sand filling port is also required to be set on the top of the cold box.
[0004] However, for small air separation cold boxes, the top space is limited, which makes it difficult to set up the safety valve and pearl sand filling port. Summary of the invention
[0005] The utility model provides a multifunctional cold box overpressure protection device, which has a simple structure, low cost, safety and reliability. It can not only provide overpressure protection, but also be used as a pearl sand filling port, reducing the space occupied at the top of the cold box and reducing material and construction costs.
[0006] In order to achieve the above purpose, the utility model provides the following technical solutions:
[0007] The utility model provides a multifunctional cold box overpressure protection device, comprising: an exhaust chimney, a cover plate and a connecting piece; the bottom end of the exhaust chimney is welded to the top of the cold box, the cover plate is arranged at the top end of the exhaust chimney, one end of the connecting piece is detachably fixedly connected to the cover plate, and the other end of the connecting piece is movably connected to the exhaust chimney, so that the cover plate can open or cover the top end of the exhaust chimney; the cover plate and the connecting piece have a preset weight, and when the positive pressure in the cold box is greater than or equal to the preset positive pressure, the cover plate and the connecting piece open the top end of the exhaust chimney under the action of pressure; when the positive pressure in the cold box is less than the preset positive pressure, the cover plate and the connecting piece cover the top end of the exhaust chimney under the action of gravity.
[0008] In one possible implementation, the connecting member includes a stud and a nut; the first end of the stud is provided with an external thread, and the first end of the stud is fixedly connected to the cover plate via the external thread and the nut; the second end of the stud is bent toward the exhaust pipe to form a bending portion, and the stud is movably connected to the exhaust pipe via the bending portion.
[0009] In a possible implementation, a ring plate surrounding the top end of the exhaust pipe is provided at the top end of the exhaust pipe, and the bent portion moves upward to abut against the ring plate.
[0010] In a possible implementation, a slide rail is provided on the outer wall of the exhaust pipe, and the bent portion extends into the slide rail so that the bent portion moves up and down along the slide rail.
[0011] In a possible implementation, a sealing groove surrounding the exhaust pipe is provided on a surface of the ring plate facing the cover plate, and an O-ring sealing gasket is provided in the sealing groove.
[0012] In a possible implementation manner, a handle is provided on the upper surface of the cover plate.
[0013] In a possible implementation, the number of the connecting members is four, and the four connecting members are evenly arranged along the circumference of the exhaust pipe.
[0014] In a possible implementation, the exhaust pipe, cover plate and connector are all made of carbon steel. The multifunctional cold box overpressure protection device provided by the present disclosure has the following advantages:
[0015] The multifunctional cold box overpressure protection device provided by the utility model, on the one hand, has a cover plate and a connecting piece with a preset weight, so that when the positive pressure in the cold box is greater than or equal to the preset positive pressure, the cover plate is pushed to open the top of the exhaust pipe, so that the gas in the cold box is discharged to the outside, thereby achieving the purpose of pressure relief; when the positive pressure in the cold box drops and is less than the preset positive pressure, the cover plate falls down under the action of gravity to cover the top of the exhaust pipe, so that the sealed gas pressure in the cold box is maintained at a normal level. On the other hand, one end of the connecting piece is detachably fixedly connected to the cover plate, so that when filling pearlescent sand, the cover plate can be removed, and the exhaust pipe can be used as a pearlescent sand filling port, thereby reducing the setting of the pearlescent sand filling port, which not only reduces the space occupied at the top of the cold box, but also saves materials and construction costs. In summary, the multifunctional cold box overpressure protection device of the utility model not only has the function of overpressure protection, but also can be used as a pearlescent sand filling port.
[0016] In addition to the technical problems solved by the embodiments of the utility model described above, the technical features that constitute the technical solutions, and the beneficial effects brought about by the technical features of these technical solutions, other technical problems that can be solved by the multifunctional cold box overpressure protection device provided by the utility model, other technical features included in the technical solutions, and the beneficial effects brought about by these technical features will be further described in detail in the specific implementation methods. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present disclosure. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.
[0018] Figure 1 This is a schematic diagram of the structure of the cover plate closing of the multifunctional cold box overpressure protection device provided by the embodiment of the utility model Figure 1 ;
[0019] Figure 2 This is a schematic diagram of the structure of the cover plate closing of the multifunctional cold box overpressure protection device provided by the embodiment of the utility model Figure 2 ;
[0020] Figure 3 yes Figure 2 A cross-sectional view at position I in the middle;
[0021] Figure 4 The structure diagram of the cover of the multifunctional cold box overpressure protection device provided by the embodiment of the utility model is opened Figure 1 ;
[0022] Figure 5 The structure diagram of the cover of the multifunctional cold box overpressure protection device provided by the embodiment of the utility model is opened Figure 2 ;
[0023] Description of reference numerals:
[0024] 10-exhaust pipe; 11-ring plate; 111-sealing groove; 12-slide rail;
[0025] 20-cover plate; 21-handle;
[0026] 30-connecting piece; 31-stud; 311-external thread; 312-bending portion; 32-nut;
[0027] 40 - O-ring sealing gasket. DETAILED DESCRIPTION
[0028] In order to make the purpose, technical solution and advantages of the embodiments of the utility model clearer, the technical solution in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the present disclosure, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0029] Reference Figures 1 to 5 As shown, the multifunctional cold box overpressure protection device provided by the embodiment of the utility model includes: an exhaust pipe 10, a cover plate 20 and a connector 30. The bottom end of the exhaust pipe 10 is welded to the top of the cold box, the cover plate 20 is arranged at the top of the exhaust pipe 10, one end of the connector 30 is detachably fixedly connected to the cover plate 20, and the other end of the connector 30 is movably connected to the exhaust pipe 10, so that the cover plate 20 can open or cover the top of the exhaust pipe 10. The cover plate 20 and the connector 30 have a preset weight. When the positive pressure in the cold box is greater than or equal to the preset positive pressure, the cover plate 20 and the connector 30 open the top of the exhaust pipe 10 under the action of pressure; when the positive pressure in the cold box is less than the preset positive pressure, the cover plate 20 and the connector 30 cover the top of the exhaust pipe 10 under the action of gravity.
[0030] In specific applications, the total weight of the cover plate 20 and the connector 30 can be set to the weight at which the cover plate 20 can be pushed open when the positive pressure in the cold box is 800Pa. In this case, when the positive pressure in the cold box reaches 800Pa, the cover plate 20 and the connector 30 will be pushed by the pressure in the cold box, so that the cover plate 20 opens the top of the exhaust pipe 10, so that the gas in the cold box is discharged to the outside, thereby achieving the purpose of pressure relief. When the positive pressure in the cold box drops to less than 800Pa, the cover plate 20 and the connector 30 fall down under the action of gravity to cover the top of the exhaust pipe 10, so that the sealing gas pressure in the cold box remains at a normal level.
[0031] In a possible implementation, the connector 30 includes a stud 31 and a nut 32, the first end of the stud 31 is provided with an external thread 311, and the first end of the stud 31 is fixedly connected to the cover plate 20 through the external thread 311 and the nut 32. For a small cold box, when filling pearlescent sand, the nut 32 can be loosened to remove the cover plate 20, and the exhaust pipe 10 can be used as a pearlescent sand filling port, thereby reducing the setting of the pearlescent sand filling port, which not only reduces the space occupied at the top of the cold box, but also saves materials and construction costs. The second end of the stud 31 is bent toward the exhaust pipe 10 to form a bending portion 312, and the stud 31 is movably connected to the exhaust pipe 10 through the bending portion 312. The shape of the stud 31 can be L-shaped.
[0032] In a possible implementation, a ring plate 11 surrounding the top of the exhaust pipe 10 is provided at the top of the exhaust pipe 10, and the bent portion 312 moves upward to abut against the ring plate 11. In specific applications, the L-shaped stud 31 is blocked by the ring plate 11 when moving upward, so that the cover plate 20 is controlled above the exhaust pipe 10 and will not be rushed to a distant place by the airflow to cause injuries to personnel and equipment.
[0033] In a possible implementation, a slide rail 12 is disposed on the outer wall of the exhaust pipe 10 , and the bent portion 312 extends into the slide rail 12 so that the bent portion 312 moves up and down along the slide rail 12 .
[0034] In a possible implementation, a sealing groove 111 surrounding the exhaust pipe 10 is provided on one side of the ring plate 11 facing the cover plate 20, and an O-shaped sealing gasket 40 is provided in the sealing groove 111. When the cold box is operating normally, the cover plate 20 presses on the O-shaped sealing gasket 40 to achieve a sealing effect, prevent the sealing gas from leaking out, and keep the sealing gas of the cold box at a normal level.
[0035] In a possible implementation, a handle 21 is provided on the upper surface of the cover plate 20 to facilitate the removal and installation of the cover plate 20 .
[0036] In a possible implementation, the number of the connecting members 30 is four, and the four connecting members 30 are evenly arranged along the circumference of the exhaust pipe 10 .
[0037] In a possible implementation, the exhaust pipe 10, the cover plate 20 and the connecting member 30 are all made of carbon steel. The use of inexpensive common carbon steel material has a low manufacturing cost.
[0038] In the description of the embodiments of the present disclosure, it needs to be understood that the terms (if any) "top", "bottom", "upper", "lower" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the embodiments of the present disclosure and simplifying the description, and do not indicate or imply that the device or part referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the embodiments of the present disclosure.
[0039] In the description of the embodiments of the present disclosure, it is to be understood that the terms "including" and "having" and any variations thereof used herein are intended to cover non-exclusive inclusions. For example, a process, method, system, product or apparatus comprising a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to these processes, methods, products or apparatuses.
[0040] Unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed", etc. should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral body; it can be directly connected or indirectly connected through an intermediate medium, which can make the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the embodiments of the present disclosure can be understood according to specific circumstances.
[0041] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present disclosure, rather than to limit them. Although the present disclosure has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present disclosure.
Claims
1. A multifunctional cold box overpressure protection device, characterized in that: include: Exhaust pipes, covers and connections; The bottom end of the exhaust pipe is welded to the top of the cold box, the cover plate is arranged at the top end of the exhaust pipe, one end of the connecting member is detachably fixedly connected to the cover plate, and the other end of the connecting member is movably connected to the exhaust pipe, so that the cover plate can open or cover the top end of the exhaust pipe; The cover plate and the connecting piece have a preset weight, and when the positive pressure in the cold box is greater than or equal to the preset positive pressure, the cover plate and the connecting piece open the top end of the exhaust pipe under the action of pressure; When the positive pressure in the cold box is less than the preset positive pressure, the cover plate and the connecting member cover the top end of the exhaust pipe under the action of gravity.
2. The multifunctional cold box overpressure protection device according to claim 1 is characterized in that: The connecting piece includes a stud and a nut; The first end of the stud is provided with an external thread, and the first end of the stud is fixedly connected to the cover plate through the external thread and the nut; the second end of the stud is bent toward the exhaust pipe to form a bending portion, and the stud is movably connected to the exhaust pipe through the bending portion.
3. The multifunctional cold box overpressure protection device according to claim 2 is characterized in that: The top end of the exhaust pipe is provided with a ring plate surrounding the top end of the exhaust pipe, and the bent portion moves upward to abut against the ring plate.
4. The multifunctional cold box overpressure protection device according to claim 3 is characterized in that: The outer wall of the exhaust pipe is provided with a slide rail, and the bent portion extends into the slide rail so that the bent portion moves up and down along the slide rail.
5. The multifunctional cold box overpressure protection device according to claim 3 is characterized in that: A sealing groove surrounding the exhaust pipe is arranged on one side of the ring plate facing the cover plate, and an O-shaped sealing gasket is arranged in the sealing groove.
6. The multifunctional cold box overpressure protection device according to any one of claims 1 to 5, characterized in that: A handle is arranged on the upper surface of the cover plate.
7. The multifunctional cold box overpressure protection device according to any one of claims 1 to 5, characterized in that: The number of the connecting pieces is four, and the four connecting pieces are evenly arranged along the circumference of the exhaust pipe.
8. The multifunctional cold box overpressure protection device according to any one of claims 1 to 5, characterized in that: The exhaust pipe, cover plate and connecting parts are all made of carbon steel.