Overpressure protection device for pressure-bearing container

Abstract

The utility model provides a pressure-bearing container overpressure protection device which comprises a pipe shell, a movable column, two elastic elements and a cover plate, the movable column is arranged in the pipe shell and can slide up and down in the movable column, the two elastic elements are arranged at the two ends of the movable column respectively, an air inlet pipe and an air outlet pipe are arranged on the side wall of the pipe shell respectively, and the cover plate is arranged on the air inlet pipe. And an air inlet and an air outlet are respectively formed in the side wall of the movable column. By arranging the tube shell, the movable column, the two elastic elements and the cover plate, the tube shell is connected with the pressure-bearing container, and when the pressure intensity in the pressure-bearing container is different from the atmospheric pressure intensity, the movable column fluctuates up and down in the tube shell, so that the air inlet is communicated with the air inlet pipe, external air is extracted to enter the pressure-bearing container, or the air outlet is communicated with the air outlet pipe; and gas in the pressure-bearing container is discharged, so that overpressure protection of the pressure-bearing container is realized. Meanwhile, the structure is simple, parts are all made of common materials, disassembly, assembly and replacement are convenient, and the use cost is low.

Description

Technical Field

[0001] This utility model relates to the field of overpressure protection technology for low-pressure vessels, and in particular to an overpressure protection device for pressure vessels. Background Technology

[0002] Pressure vessels generally require overpressure protection devices to release pressure in case of accidental overpressure during operation, protecting the safety of the pressure vessel. Commonly used overpressure protection devices include safety valves and rupture diaphragms. Safety valves and rupture diaphragms are relatively expensive to purchase and can only release the medium to reduce pressure when it reaches a certain value; they do not provide pressure compensation. Safety valves require regular calibration and have high maintenance costs; rupture diaphragms are single-use and need to be replaced after activation, also resulting in high maintenance costs.

[0003] To address this issue, we propose an overpressure protection device for pressure vessels to solve the problem of high maintenance costs in existing overpressure protection structures. Utility Model Content

[0004] In view of the shortcomings of the prior art described above, the purpose of this utility model is to provide an overpressure protection device for pressure vessels, which solves the problem of high maintenance cost of overpressure protection structures in the prior art.

[0005] To achieve the above and other related objectives, this utility model provides an overpressure protection device for a pressure vessel, comprising: a shell, a movable column, two elastic elements, and a cover plate. The movable column is disposed inside the shell and can slide up and down inside the movable column. The two elastic elements are respectively disposed at both ends of the movable column. An air inlet pipe and an air outlet pipe are respectively provided on the side wall of the shell. An air inlet and an air outlet are respectively provided on the side wall of the movable column. The upper end of the shell is detachably connected to the cover plate, and the lower end of the shell is connected to an external pressure vessel.

[0006] Preferably, both the air inlet pipe and the air outlet pipe are L-shaped, with the ends of the air inlet pipe and the air outlet pipe facing opposite directions and both ends equipped with filters.

[0007] Preferably, the outer surface of the movable column is fitted with a plurality of rubber rings, the number of which is at least one, and one of the rubber rings is located below the air outlet.

[0008] Preferably, the elastic element is a spring, the bottom of the inner wall of the tube extends inward to form a limiting ring, the cover plate is connected to the tube by a threaded connection, and the cover plate has a through hole in the middle.

[0009] Preferably, the lower end of the movable column is connected to a telescopic tube, and the lower end of the telescopic tube is provided with a sealing element. The sealing element is used to close the gap between the movable column and the limiting ring, and the two ends of the side wall of the tube shell are connected to U-shaped tubes.

[0010] Preferably, the closure includes a fixing ring, a baffle is provided around the upper end of the outer side wall of the fixing ring, a locking ring is threadedly connected to the lower side wall of the fixing ring, the outer diameter of the fixing ring is the same as the inner diameter of the limiting ring, and the outer surface of the fixing ring is covered with a rubber film.

[0011] Preferably, the front end of the tube shell is provided with a transparent window, and the transparent window is marked with scale lines for the air inlet pipe and the air outlet pipe.

[0012] As described above, the pressure vessel overpressure protection device disclosed in this utility model has the following beneficial effects: This utility model connects the pipe shell, movable column, two elastic elements, and a cover plate to the pressure vessel. When there is a pressure difference between the inside of the pressure vessel and atmospheric pressure, the movable column moves up and down within the pipe shell, connecting the air inlet to the air inlet pipe to draw in external gas into the pressure vessel, or connecting the air outlet to the air outlet pipe to discharge gas from the pressure vessel, thus achieving overpressure protection for the pressure vessel. Furthermore, this structure is simple in construction, uses common materials for its parts, is easy to disassemble and replace, and has low operating costs.

[0013] Therefore, this utility model effectively overcomes the various shortcomings of the prior art and has high industrial application value. Attached Figure Description

[0014] Figure 1 The image shown is a perspective view of an overpressure protection device for a pressure vessel according to this utility model.

[0015] Figure 2 The image shown is a cross-sectional view of an overpressure protection device for a pressure vessel according to this utility model.

[0016] Figure 3 The image shown is a perspective view of the movable column of an overpressure protection device for a pressure vessel according to this utility model.

[0017] Figure 4 The image shown is a perspective view of the sealing component of an overpressure protection device for a pressure vessel according to this utility model.

[0018] Component designation explanation

[0019] 1. Tube shell; 2. Movable column; 3. Elastic element; 4. Cover plate; 5. Telescopic tube; 6. Sealing component; 7. Air inlet; 8. Air outlet; 9. Rubber ring; 10. Air inlet pipe; 11. Air outlet pipe; 12. Filter screen; 13. Limiting ring; 14. Transparent window; 15. U-shaped tube; 16. Through hole; 17. Fixing ring; 18. Baffle; 19. Locking ring. Detailed Implementation

[0020] The following specific embodiments illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification.

[0021] Please see Figures 1 to 4 It should be understood that the structures, proportions, sizes, etc., illustrated in the accompanying drawings are merely for illustrative purposes to aid those skilled in the art and are not intended to limit the scope of this invention. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in proportions, or adjustments to size, without affecting the effectiveness and purpose of this invention, should still fall within the scope of the disclosed technical content. Furthermore, the terms "upper," "lower," "left," "right," "middle," and "one" used in this specification are merely for clarity and not intended to limit the scope of this invention. Changes or adjustments to their relative relationships, without substantially altering the technical content, should also be considered within the scope of this invention.

[0022] like Figure 1-4 As shown, this utility model provides an overpressure protection device for a pressure vessel, including: a shell 1, a movable column 2, two elastic elements 3, and a cover plate 4. The movable column 2 is located inside the shell 1 and can slide up and down inside the movable column 2. The two elastic elements 3 are respectively located at both ends of the movable column 2. An air inlet pipe 10 and an air outlet pipe 11 are respectively provided on the side wall of the shell 1. An air inlet 7 and an air outlet 8 are respectively provided on the side wall of the movable column 2. The upper end of the shell 1 is detachably connected to the cover plate 4, and the lower end of the shell 1 is connected to an external pressure vessel. When the pressure inside the pressure vessel is the same as atmospheric pressure, the movable column 2 is exactly in the middle of the shell 1. At this time, the air inlet 7 is not connected to the air inlet pipe 10, and the air outlet pipe 11 is not connected to the air outlet 8. When the pressure inside the pressure vessel increases, the movable column 2 rises, connecting the air outlet 8 to the air outlet pipe 11, venting the gas to the outside. When the pressure inside the pressure vessel decreases, the movable column 2 descends, connecting the air inlet 7 to the air inlet pipe 10, drawing in outside air to the pressure vessel, thus achieving overpressure protection for the pressure vessel. The elastic element 3 increases the thrust required for the movable column 2 to move, i.e., increases the pressure threshold of the structure, avoiding excessive sensitivity that could affect the airtightness between the movable column 2 and the shell 1. The internal parts of the shell 1 can be replaced by removing the cover plate 4, reducing maintenance difficulty. This structure uses simple materials, allowing for replacement of individual damaged parts at a low cost.

[0023] In one embodiment, please refer to Figure 1-2Both the inlet pipe 10 and the outlet pipe 11 are L-shaped, with their ends facing opposite directions and each end equipped with a filter screen 12. The filter screen 12 filters the gas entering and exiting the pressure vessel, reducing internal and external contamination.

[0024] In one embodiment, please refer to Figure 2 The outer surface of the movable column 2 is fitted with several rubber rings 9, with at least one rubber ring 9 located below the air outlet 8. The function of the rubber rings 9 is to increase the sealing between the casing 1 and the movable column 2. In the attached drawing, four rubber rings 9 are provided, respectively distributed on both sides of the air inlet 7 and the air outlet 8, which improves the airtightness and extends the service life of the equipment.

[0025] In one embodiment, please refer to Figure 2 The elastic element 3 is a spring, and the elastic force of the spring is related to the pressure threshold that the structure can withstand. The bottom of the inner wall of the shell 1 extends inward to form a limiting ring 13. The cover plate 4 is connected to the shell 1 by a threaded connection for easy disassembly and assembly. The cover plate 4 has a through hole 16 in the middle, which allows the upper space of the shell 1 to communicate with the outside.

[0026] In one embodiment, please refer to Figure 2-4 The lower end of the movable column 2 is connected to a telescopic tube 5, and the lower end of the telescopic tube 5 is provided with a sealing element 6. The sealing element 6 is used to seal the gap between the movable column 2 and the limiting ring 13. The sealing element 6 is fixed on the limiting ring 13, which can prevent gas inside the pressure vessel from entering the lower part of the shell 1 through the gap between the movable column 2 and the limiting ring 13, thus affecting the service life of the elastic element 3. U-shaped tubes 15 are connected to both ends of the side wall of the shell 1. The U-shaped tubes 15 are used to keep the air pressure at both ends inside the shell 1 consistent, so as to facilitate the movable column 2 to slide up and down inside the shell 1.

[0027] In one embodiment, please refer to Figure 4 The closure 6 includes a retaining ring 17, with a baffle 18 surrounding the upper end of the outer side wall of the retaining ring 17. A locking ring 19 is threadedly connected to the lower side of the outer side wall of the retaining ring 17. The outer diameter of the retaining ring 17 is the same as the inner diameter of the limiting ring 13, and the outer surface of the retaining ring 17 is covered with a rubber membrane. By engaging the retaining ring 17 with the limiting ring 13 and sealing it with the rubber membrane, the baffle 18 is made to fit against the surface of the limiting ring 13. After use, the locking ring 19 is threadedly connected to the retaining ring 17 from the other side of the limiting ring 13, thus fixing the retaining ring 17 to the limiting ring 13 and maintaining a seal between them.

[0028] In one embodiment, please refer to Figure 1 The front end of the casing 1 is provided with a transparent window 14, on which scale lines for the air inlet pipe 10 and the air outlet pipe 11 are marked. The internal structure of the movable column 2 can be observed through the transparent window 14.

[0029] The specific usage process of this utility model is as follows:

[0030] During the assembly stage, an elastic element 3 is placed inside the tube shell 1, and then the movable column 2 is inserted into the tube shell 1. The movable column 2 is pressed down, causing the telescopic tube 5 to retract and drive the fixed ring 17 to lock onto the limiting ring 13, so that the baffle 18 fits against the outer surface of the limiting ring 13. Then, the fixed ring 17 and the locking ring 19 are screwed together from the other end of the limiting ring 13 to close the gap between the limiting ring 13 and the movable column 2. Then, another elastic element 3 is placed on the movable column 2, and the cover plate 4 is put on to complete the assembly process of this device.

[0031] During use, the shell 1 is connected to the pressure vessel. When the pressure inside the pressure vessel is the same as the atmospheric pressure, the movable column 2 is exactly in the middle of the shell 1. At this time, the air inlet 7 is not connected to the air inlet pipe 10, and the air outlet pipe 11 is not connected to the air outlet 8. When the pressure inside the pressure vessel increases, the movable column 2 rises, connecting the air outlet 8 to the air outlet pipe 11, and venting the gas to the outside. When the pressure inside the pressure vessel decreases, the movable column 2 descends, connecting the air inlet 7 to the air inlet pipe 10, drawing in external air into the pressure vessel, thus achieving overpressure protection for the pressure vessel.

[0032] The above embodiments are merely illustrative of the principles and effects of this utility model and are not intended to limit the scope of this utility model. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of this utility model. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in this utility model should still be covered by the claims of this utility model.

Claims

1. An overpressure protection device for a pressure vessel, characterized in that, include: The tube shell (1), the movable column (2), the two elastic elements (3) and the cover plate (4) are provided. The movable column (2) is located inside the tube shell (1) and can slide up and down inside the movable column (2). The two elastic elements (3) are respectively located at both ends of the movable column (2). The side wall of the tube shell (1) is provided with an air inlet pipe (10) and an air outlet pipe (11). The side wall of the movable column (2) is provided with an air inlet (7) and an air outlet (8). The upper end of the tube shell (1) is detachably connected to the cover plate (4). The lower end of the tube shell (1) is connected to an external pressure vessel.

2. The pressure vessel overpressure protection device according to claim 1, characterized in that: Both the air inlet pipe (10) and the air outlet pipe (11) are L-shaped. The ends of the air inlet pipe (10) and the air outlet pipe (11) face opposite directions and both ends are equipped with filters (12).

3. The pressure vessel overpressure protection device according to claim 1, characterized in that: The outer surface of the movable column (2) is fitted with several rubber rings (9), and the number of rubber rings (9) is at least one, with one rubber ring (9) located below the air outlet (8).

4. The pressure vessel overpressure protection device according to claim 1, characterized in that: The elastic element (3) is a spring, the bottom of the inner wall of the tube shell (1) extends inward to form a limiting ring (13), the cover plate (4) is connected to the tube shell (1) by a threaded connection, and the cover plate (4) has a through hole (16) in the middle.

5. The pressure vessel overpressure protection device according to claim 4, characterized in that: The lower end of the movable column (2) is connected to a telescopic tube (5), and the lower end of the telescopic tube (5) is provided with a sealing member (6). The sealing member (6) is used to close the gap between the movable column (2) and the limiting ring (13). The two ends of the side wall of the tube shell (1) are connected to U-shaped tubes (15).

6. The pressure vessel overpressure protection device according to claim 5, characterized in that: The closure (6) includes a fixing ring (17), a baffle (18) is provided around the upper end of the outer side wall of the fixing ring (17), a locking ring (19) is threadedly connected to the lower side wall of the fixing ring (17), the outer diameter of the fixing ring (17) is the same as the inner diameter of the limiting ring (13), and the outer surface of the fixing ring (17) is covered with a rubber film.

7. The pressure vessel overpressure protection device according to claim 1, characterized in that: The front end of the tube shell (1) is provided with a transparent window (14), and the transparent window (14) is marked with scale lines for the air inlet pipe (10) and the air outlet pipe (11).

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