Oxygen bomb and its sealing structure

Abstract

The application discloses a sealing structure, which comprises a cylinder, a cylinder cover detachably arranged at a cylinder opening of the cylinder, and a sealing ring, an installation ring groove is arranged on an outer wall of the cylinder, the sealing ring is tightly clamped in the installation ring groove, a first protruding ring is arranged on an inner wall of the cylinder cover, the first protruding ring is used for pressing a top of the sealing ring, and a first gap is left between an inner circular surface of the first protruding ring and an outer circular surface of the cylinder, a diameter of the sealing ring is smaller than a radial distance between a groove bottom surface of the installation ring groove and an inner wall surface of the cylinder cover, and the first gap is used for enabling gas in the cylinder to enter an inner side of the sealing ring. The sealing structure disclosed by the application can optimize sealing performance, adapt to a higher pressure environment, prevent high-pressure sealing failure, and be easy to open and close the cover by hand. The application further discloses an oxygen bomb, and the beneficial effects are as above.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of oxygen bomb, in particular to a sealing structure. BACKGROUND

[0002] The oxygen bomb is an important component of the oxygen bomb calorimeter, which is a kind of sealed container with high temperature resistance and high pressure resistance. When the oxygen bomb calorimeter is used, about 3MPa of oxygen needs to be filled in the oxygen bomb. During the testing of the sample, high temperature and high pressure gas can be generated by short-term combustion, and the short-term pressure can reach 20MPa, and the short-term temperature can reach more than 1000℃. Therefore, the working characteristics of the oxygen bomb have very high requirements for the sealing performance of the sealing structure, and the greater the internal pressure, the higher the requirement for the sealing performance of the sealing structure. The conventional sealing structure is prone to failure under high pressure.

[0003] The traditional oxygen bomb mainly includes a bomb barrel, a bomb cover and a sealing ring. Among them, in some oxygen bombs, the bomb barrel and the bomb cover are usually fastened and connected by threads or buckles, and the sealing ring is placed in the groove of the bomb cover. When fastening, the top end of the bomb barrel presses against the sealing ring, causing the sealing ring to be compressed to a certain extent to achieve sealing, commonly known as top sealing. However, if the internal pressure of the container is too high, the sealing ring will continue to deform, and the sealing will fail. The greater the internal pressure, the more difficult it is to seal. In some other oxygen bombs, the bomb barrel and the bomb cover are fastened and connected by threads or buckles, and the sealing ring is placed in the groove of the container barrel. When the bomb cover is put on, the sealing ring is radially compressed to achieve sealing. However, when the radial outer edge of the sealing ring is severely worn or the internal pressure is too high, the sealing will also fail.

[0004] As an improvement, some oxygen bombs in the prior art use a bomb barrel, a bomb cover and a sealing ring in combination with a buckle ring, a compression ring and other components. Although this can be used in a high pressure environment and the sealing performance is optimized, the number of components is large, the structure is complex, and the cost is high. In addition, the bomb cover, buckle ring and bomb barrel need to be operated in sequence when opening and closing the cover, which makes the opening and closing operation cumbersome. It should be noted that most oxygen bombs are manually operated, and the opening and closing process of the bomb cover should be simple and fast, usually without the use of tools such as wrenches, but directly operated by hand.

[0005] Therefore, how to optimize the sealing performance, adapt to a higher pressure environment, prevent high pressure sealing failure, and easily operate the cover by hand are technical problems faced by those skilled in the art. SUMMARY

[0006] The purpose of the present application is to provide a sealing structure that can optimize the sealing performance, adapt to a higher pressure environment, prevent high pressure sealing failure, and easily operate the cover by hand. Another purpose of the present application is to provide an oxygen bomb.

[0007] To solve the above technical problems, the present application provides a sealing structure, comprising a cylinder, a cylinder cover detachably arranged at the cylinder mouth of the cylinder, and a sealing ring, an installation ring groove is arranged on the outer wall of the cylinder, the sealing ring is tightly clamped in the installation ring groove, a first protruding ring is arranged on the inner wall of the cylinder cover, the first protruding ring is used for pressing the top of the sealing ring, and a first gap is left between the inner circular surface of the first protruding ring and the outer circular surface of the cylinder, the diameter of the sealing ring is smaller than the radial distance between the groove bottom surface of the installation ring groove and the inner wall surface of the cylinder cover, and the first gap is used for allowing the gas in the cylinder to enter the inner side of the sealing ring.

[0008] Preferably, the installation ring groove is arranged at the top end region of the outer wall of the cylinder.

[0009] Preferably, the top groove wall of the installation ring groove is a second protruding ring protruding at the top end of the outer wall of the cylinder, and the first gap is left between the inner circular surface of the first protruding ring and the outer circular surface of the second protruding ring.

[0010] Preferably, the width of the first gap is 1-2 mm.

[0011] Preferably, the cylinder cover comprises a top cover body and a side cover body connected as a whole, the top cover body covers the cylinder mouth, and the side cover body is detachably connected with the outer wall of the cylinder.

[0012] Preferably, the top of the first protruding ring is connected as a whole with the top cover body.

[0013] Preferably, the installation ring groove is an L-shaped groove, a rectangular groove or an arc-shaped groove.

[0014] Preferably, an inclined bottom slope surface extending upward is arranged on the bottom groove wall of the installation ring groove, an inclined top slope surface extending downward is arranged on the bottom surface of the first protruding ring, and the bottom slope surface and the top slope surface are used for clamping and rebound guiding the sealing ring.

[0015] Preferably, the included angle between the bottom slope surface and the top slope surface and the horizontal plane is within 3-5°.

[0016] The present application also provides an oxygen bomb comprising the sealing structure according to any one of the above.

[0017] The sealing structure comprises a cylinder, a cover, a sealing ring, a mounting ring groove, a first protruding ring and a first gap. The cylinder is one of the main components of the sealing structure, the cover is another main component of the sealing structure and is mounted at the cylinder opening to form a detachable connection with the cylinder, which can be easily disassembled. The mounting ring groove is provided on the outer wall of the cylinder, and the sealing ring is arranged in the mounting ring groove. The sealing ring has a pre-tightening force and is tightly clamped in the mounting ring groove after elastic deformation, which is equivalent to being clamped on the mounting ring groove after being expanded. The first protruding ring is arranged on the inner wall of the cover and extends radially inward or toward the cylinder. When the cover is installed, the bottom surface of the first protruding ring gradually presses the top of the sealing ring mounted in the mounting ring groove, so that the sealing ring is deformed and an initial sealing effect is generated on the gap between the outer wall of the cylinder and the inner wall of the cover. Importantly, the inner circular surface of the first protruding ring and the outer circular surface of the cylinder leave a first gap, which is mainly used to allow the gas in the cylinder to pass through the first gap and enter the mounting ring groove and the inside area of the sealing ring, so as to form outward pressure on the inside of the sealing ring, thereby causing the elastic expansion of the sealing ring. At the same time, the diameter of the sealing ring is smaller than the radial distance between the bottom surface of the mounting ring groove and the inner wall surface of the cover.

[0018] Therefore, when the cover is closed, the sealing ring remains in the initial state (slight elastic deformation) and is tightly clamped in the mounting ring groove. Since the diameter of the sealing ring is smaller than the radial distance between the bottom surface of the mounting ring groove and the inner wall surface of the cover, a certain gap is maintained between the outer wall of the sealing ring and the inner wall surface of the cover, and the two do not come into contact and friction, so that the sealing ring does not affect the cover during the closing process of the cover, and the closing operation of the cover can be easily realized manually by the staff. During the sample test, the gas pressure in the cylinder suddenly increases, and the gas quickly enters the narrow gap on the inside of the sealing ring in the mounting ring groove through the first gap, and forms a radial outward pressure on the inside of the sealing ring. The huge pressure forces the sealing ring to rapidly expand elastically and tightly press against the inner wall surface of the cover, thereby sealing the gap between the outer wall of the cylinder and the inner wall of the cover. The greater the gas pressure in the cylinder, the stronger the pressure on the inside of the sealing ring, and the more tightly the sealing ring is expanded and pressed, thereby further enhancing the sealing effect of the gap between the outer wall of the cylinder and the inner wall of the cover. Of course, after the sample test is completed, the gas pressure in the cylinder quickly decreases until it returns to normal pressure, so that the sealing ring rebounds and returns to the initial state under the action of its own elastic force, i.e. it is tightly clamped in the mounting ring groove again and is separated from the inner wall of the cover, thereby maintaining a certain gap with the inner wall of the cover. Therefore, the sealing ring does not affect the cover during the opening process of the cover, and the opening operation of the cover can be easily realized manually by the staff.

[0019] In conclusion, the sealing structure provided by the application can optimize the sealing performance, adapt to a higher pressure environment, prevent high-pressure sealing failure, and facilitate manual cover opening and closing operations. BRIEF DESCRIPTION OF DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed to be used in the embodiments or the prior art description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor on the basis of the provided drawings.

[0021] Figure 1 The overall structure schematic diagram of one specific embodiment provided by the present application.

[0022] Figure 2 The state schematic diagram of the sealing ring before sample testing.

[0023] Figure 3 The state schematic diagram of the sealing ring during sample testing.

[0024] Figure 4 The specific structure schematic diagram of the installation ring groove and the first protruding ring.

[0025] Among them, Figure 1 — Figure 4 In the middle:

[0026] Ejector barrel - 1, ejector cover - 2, sealing ring - 3, first gap - 4, second gap - 5;

[0027] Barrel port - 11, installation ring groove - 12, second protruding ring - 13, bottom slope surface - 14;

[0028] First protruding ring - 21, top inclined surface - 22;

[0029] Top cover body - 201, side cover body - 202. DETAILED DESCRIPTION

[0030] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some embodiments of the present application, not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.

[0031] Please refer to Figure 1 , Figure 1 The overall structure schematic diagram of one specific embodiment provided by the present application.

[0032] In one specific embodiment of the present application, the sealing structure mainly comprises a barrel 1, a cover 2, a sealing ring 3, a mounting ring groove 12, a first protruding ring 21 and a first gap 4.

[0033] The barrel 1 is one of the main components of the sealing structure, and the cover 2 is another main component of the sealing structure and is mounted at the barrel mouth 11 of the barrel 1 to form a detachable connection with the barrel 1, which can be conveniently disassembled.

[0034] The mounting ring groove 12 is provided on the outer wall of the barrel 1, and the sealing ring 3 is arranged in the mounting ring groove 12, and the sealing ring 3 has a pre-tightening force to produce elastic deformation and tightly clamp in the mounting ring groove 12, which is equivalent to being stretched and clamped on the mounting ring groove 12.

[0035] The first protruding ring 21 is arranged on the inner wall of the cover 2 and extends radially inward or toward the barrel 1. When the cover 2 is mounted, the bottom surface of the first protruding ring 21 gradually presses the top of the sealing ring 3 mounted in the mounting ring groove 12, so that the sealing ring 3 produces a certain deformation and produces an initial sealing effect on the gap between the outer wall of the barrel 1 and the inner wall of the cover 2.

[0036] Importantly, the inner circular surface of the first protruding ring 21 and the outer circular surface of the barrel 1 leave a first gap 4, which is mainly used for the gas in the barrel 1 to pass through and enter the mounting ring groove 12 and the inside area of the sealing ring 3 to form an outward pressure on the inside of the sealing ring 3, thereby causing the elastic expansion of the sealing ring 3. At the same time, the diameter of the sealing ring 3 is smaller than the radial distance between the groove bottom surface of the mounting ring groove 12 and the inner wall surface of the cover 2.

[0037] Therefore, when the cover of the elastic cover 2 is closed, the sealing ring 3 remains in the initial state (slightly elastic deformation) and is tightly clamped in the mounting ring groove 12. Since the diameter of the sealing ring 3 is smaller than the radial distance between the bottom surface of the mounting ring groove 12 and the inner wall surface of the elastic cover 2, a certain gap is reserved between the outer wall of the sealing ring 3 and the inner wall surface of the elastic cover 2, and the two do not abut and rub each other. Therefore, during the closing process of the elastic cover 2, the sealing ring 3 does not affect the elastic cover 2, and the closing operation of the elastic cover 2 can be easily realized manually by the worker. During the sample test, the air pressure in the elastic barrel 1 suddenly increases, and the gas quickly enters the narrow gap on the inner side of the sealing ring 3 in the mounting ring groove 12 through the first gap 4, and forms a radial outward pressure on the inner side of the sealing ring 3. The huge pressure forces the sealing ring 3 to rapidly expand elastically and be pressed outward to tightly abut on the inner wall surface of the elastic cover 2, so as to seal the gap between the outer wall of the elastic barrel 1 and the inner wall of the elastic cover 2. The greater the air pressure in the elastic barrel 1, the stronger the pressure on the inner side of the sealing ring 3, and the more tightly the sealing ring 3 is pressed, thereby enhancing the sealing effect of the gap between the outer wall of the elastic barrel 1 and the inner wall of the elastic cover 2. Of course, after the sample test is completed, when the cover of the elastic cover 2 is opened, the air pressure in the elastic barrel 1 quickly decreases until it returns to normal pressure. Therefore, the sealing ring 3 rebounds and returns to the initial state under the action of its own elastic force, i.e., is tightly clamped in the mounting ring groove 12 again and is separated from the inner wall of the elastic cover 2, so as to maintain a certain gap with the inner wall of the elastic cover 2. Therefore, during the opening process of the elastic cover 2, the sealing ring 3 does not affect the elastic cover 2, and the opening operation of the elastic cover 2 can be easily realized manually by the worker.

[0038] In summary, the sealing structure provided by the embodiment can optimize the sealing performance, adapt to a higher pressure environment, prevent high-pressure sealing failure, and facilitate manual opening and closing operations.

[0039] In an alternative embodiment of the elastic cover 2, the elastic cover 2 mainly includes a top cover body 201 and a side cover body 202. The top cover body 201 is mainly used to cover the barrel port 11 of the elastic barrel 1, and the side cover body 202 is connected to the outer wall of the top cover body 201 and is used to cover the outer barrel wall of the elastic barrel 1. The side cover body 202 is detachably connected to the outer wall of the elastic barrel 1. For example, the inner wall of the side cover body 202 is threadedly connected to the outer wall of the elastic barrel 1, or the side cover body 202 is inserted into the clamping groove on the outer wall of the elastic barrel 1, or the elastic cover 2 is integrally inverted and buckled on the barrel port 11 of the elastic barrel 1.

[0040] Further, in order to facilitate the opening and closing operation of the cover 2 and improve the opening and closing operation, in the embodiment, the top cover body 201 and the side cover body 202 are connected as a whole, for example, the two can be processed by an integrated molding manufacturing process. In this way, when the opening and closing operation is performed, only the whole cover 2 needs to be operated, without the need to operate the top cover body 201 and the side cover body 202 in sequence, and the operation is more convenient.

[0041] In an alternative embodiment regarding the installation ring groove 12, considering that the cover 2 is installed at the barrel mouth 11 of the cartridge 1 to seal the barrel mouth 11, and the barrel mouth 11 of the cartridge 1 is usually located at the top end (or outer end) of the cartridge 1, for this, the installation ring groove 12 is specifically provided at the top end region of the outer wall of the cartridge 1, so that the installation position of the sealing ring 3 is within the coverage range of the cover 2. At this time, the installation ring groove 12 can specifically be L-shaped, without a top groove wall, only a groove bottom surface and a bottom groove wall, and the radial length of the top groove wall is zero.

[0042] In another alternative embodiment regarding the installation ring groove 12, the installation ring groove 12 can also be provided at other positions on the outer wall of the cartridge 1, such as a position away from the top end of the cartridge 1, etc., but also needs to fall within the coverage range of the cover 2. Of course, the installation ring groove 12 can also be rectangular, arc-shaped, etc.

[0043] In order to facilitate the control of the specific gap value of the first gap 4, in the embodiment, a second protruding ring 13 is additionally provided. Specifically, the second protruding ring 13 can reuse the top groove wall of the installation ring groove 12. Of course, for the L-shaped installation ring groove 12, the second protruding ring 13 is equivalent to a ring-shaped structure protruding at the position of the top groove wall of the installation ring groove 12, and can be regarded as the top groove wall of the installation ring groove 12. At the same time, the protruding height (or radial extension length) of the second protruding ring 13 is obviously smaller than the radial length of the bottom groove wall of the installation ring groove 12, so as to ensure that the gas passing through the first gap 4 can enter the inner side region of the sealing ring 3. Moreover, the outer circular surface of the second protruding ring 13 and the inner circular surface of the first protruding ring 21 on the cover 2 are opposite to each other, and a gap therebetween is the first gap 4. Generally, the gap value of the first gap 4 can be 1.5 mm, etc., and can be adjusted between 1-2 mm.

[0044] As shown in Figure 2 , Figure 3 , Figure 2 is a schematic view of the state of the sealing ring 3 before sample testing, Figure 3 is a schematic view of the state of the sealing ring 3 during sample testing.

[0045] With such a setting, since the first raised ring 21 protrudes from the inner wall of the bullet cover 2 and extends radially, an L-shaped groove is also formed between the first raised ring 21 and the inner wall of the bullet cover 2. Ignoring the first gap 4, the first raised ring 21, the second raised ring 13, the inner wall of the bullet cover 2 and the mounting ring groove 12 together form a cavity similar to a rectangle, and the sealing ring 3 is installed in this cavity. Before the sample test, the sealing ring 3 is tightly fastened to the inner side wall (the left side wall shown in the figure) of the cavity and does not contact the outer side wall of the cavity; during the sample test, after the sealing ring 3 is expanded by air pressure, the sealing ring 3 is pressed against the outer side wall (the right side wall shown in the figure) of the cavity and undergoes elastic deformation to fill the outer region of the entire cavity (the specific shape is determined by the shape of the cavity), so as to seal the gap between the outer wall of the cartridge case 1 and the inner wall of the bullet cover 2, that is, seal the second gap 5. Moreover, the greater the air pressure, the greater the deformation of the sealing ring 3 and the stronger the sealing effect on the second gap 5; at the same time, the top of the sealing ring 3 and the bottom surface of the first raised ring 21 are pressed tightly against each other to form a seal, and the greater the air pressure, the tighter the pressing and the better the sealing effect; and the bottom of the sealing ring 3 and the bottom wall surface of the mounting ring groove 12 are pressed tightly against each other to form a seal, and similarly, the greater the air pressure, the tighter the pressing and the better the sealing effect.

[0046] In an optional embodiment regarding the first raised ring 21, the top of the first raised ring 21 is integrally connected to the top cover body 201. With such a setting, the first raised ring 21 is equivalent to being specifically arranged at the included angle position between the top cover body 201 and the side cover body 202, which can facilitate the integral molding manufacturing with the top cover body 201 and the side cover body 202.

[0047] As Figure 4 shown, Figure 4 Figure 10 is a schematic structural diagram of the mounting ring groove 12 and the first raised ring 21.

[0048] In addition, in order to further improve the sealing effect of the sealing ring 3 on the second gap 5, the bottom slope surface 14 and the top inclined surface 22 are additionally provided in the embodiment. Specifically, the bottom slope surface 14 is arranged on the bottom groove wall of the mounting groove 12 and extends upwardly and obliquely, and has a certain angle or slope with the horizontal plane. Meanwhile, the top inclined surface 22 is arranged on the bottom surface of the first protruding ring 21 and extends downwardly and obliquely, and has a certain angle or slope with the horizontal plane. The bottom slope surface 14 and the top inclined surface 22 are vertically opposite to each other, and the above-mentioned cavity is shaped to be inwardly contracted, such as from a rectangle to a trapezoid, etc. In this way, when the sealing ring 3 is elastically expanded by being pressed by the air pressure, the sealing ring 3 is pressed into the cavity shaped to be contracted, and the top inclined surface 22 and the bottom slope surface 14 further press the top and bottom of the sealing ring 3, so that the sealing ring 3 is further elastically deformed, and the sealing effect of the sealing ring 3 on the second gap 5 is further improved. In addition, when the air pressure is restored and the sealing ring 3 is elastically retracted, the oblique abutting force of the top inclined surface 22 and the bottom slope surface 14 on the top and bottom of the sealing ring 3 can guide the sealing ring 3 to be elastically retracted more easily.

[0049] Generally, the angle between the top inclined surface 22 and the bottom slope surface 14 and the horizontal plane is between 3-5°, such as 4°, etc.

[0050] The embodiment also provides an oxygen bomb, which mainly comprises a sealing structure and other components, wherein the sealing structure is the same as the above-mentioned related content. In this way, since the sealing structure adopts all the technical solutions of the above-mentioned sealing structure, the oxygen bomb provided by the embodiment also has all the technical effects brought by the technical solutions of the above-mentioned embodiments, which will not be repeated here.

[0051] The above description of disclosed embodiments enables a person skilled in the art to implement or use the present application. Various modifications to these embodiments will be apparent to those skilled in the art, and 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 the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A sealing structure, characterized in that, The device includes a cartridge (1), a cartridge cover (2) detachably disposed at the opening (11) of the cartridge (1), and a sealing ring (3). The outer wall of the cartridge (1) is provided with an installation ring groove (12), and the sealing ring (3) is tightly fitted in the installation ring groove (12). The inner wall of the cartridge cover (2) is provided with a first protruding ring (21), which is used to press the top of the sealing ring (3). A first gap (4) is left between the inner circle surface of the first protruding ring (21) and the outer circle surface of the cartridge (1). The diameter of the sealing ring (3) is smaller than the radial distance between the bottom surface of the installation ring groove (12) and the inner wall surface of the cartridge cover (2). The first gap (4) is used to allow the gas in the cartridge (1) to enter the inner side of the sealing ring (3). The top wall of the mounting ring groove (12) is a second protruding ring (13) protruding from the top of the outer wall of the cartridge (1), and the first gap (4) is left between the inner circle of the first protruding ring (21) and the outer circle of the second protruding ring (13). The bottom wall of the mounting ring groove (12) is provided with an inclined upward extending bottom slope (14), and the bottom surface of the first protruding ring (21) is provided with an inclined downward extending top slope (22). The bottom slope (14) and the top slope (22) are used to clamp the sealing ring (3) and form a spring-loaded guide for it.

2. The sealing structure according to claim 1, characterized in that, The mounting groove (12) is located at the top of the outer wall of the cartridge (1).

3. The sealing structure according to claim 1, characterized in that, The width of the first gap (4) is 1~2mm.

4. The sealing structure according to claim 1, characterized in that, The cartridge cover (2) includes a top cover (201) and a side cover (202) that are integrated together. The top cover (201) covers the opening (11) of the cartridge, and the side cover (202) is detachably connected to the outer wall of the cartridge (1).

5. The sealing structure according to claim 4, characterized in that, The top of the first protruding ring (21) is integrated with the top cover (201).

6. The sealing structure according to claim 1, characterized in that, The mounting ring groove (12) is an L-shaped groove, a rectangular groove, or an arc-shaped groove.

7. The sealing structure according to claim 1, characterized in that, The angles between the bottom slope (14) and the top slope (22) and the horizontal plane are both within 3~5°.

8. An oxygen bomb, characterized in that, Includes the sealing structure as described in any one of claims 1-7.

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