Self-ventilating door of single-screw adjustable pressure chamber

Abstract

The single-screw adjustable self-venting pressure chamber door is presented as an alternative method for sealing the entrance of leak-free chambers. One of the common methods for sealing chambers is to use a multiple-bolt and flange mechanism, which requires a lot of time and difficulty in achieving isolation under increased pressure conditions. In the present design, an adjustable floating door mechanism and a special cross-sectional air seal rubber are used. In the old design used in industrial applications, airtight conditions were provided with more than 25 screws, but in the present design, the movable door is used on one side of a special hinge and on the other side with only one screw for quick opening and closing of the door with a specially designed frame. With the increase in pressure inside the chamber after closing the door, due to the use of the floating door mechanism, the airtight rubber is more pressurized and acts as a self-airing for the low pressure limit and the high pressure limit. By moving the floating door at the moment of pressure application and lifting the connecting nuts, it is possible to lock the door by re-tightening the nuts at maximum pressure to prevent leakage due to shocks caused by the displacement of the chamber.

Description

Description of the invention Title of the invention Self-ventilating door of single-screw adjustable pressure chamber Technical background of the relevant invention This invention relates to self-ventilating, adjustable air-tight compartment doors, where increasing the pressure inside the compartment helps to better seal the door. Technical problem and stating the objectives of the invention Having a door mechanism with different cross-sections, such as a square, that has self-ventilation properties (better airtightness with increasing pressure) and on the other hand, the user can provide complete insulation inside the chamber by simply tightening a screw on one side and a hinge on the other side of the structure, was a concern in the present industrial project. On the other hand, maintaining the airtightness of the chamber door during movement and transportation of the chamber and due to the impact on the structure was also another goal of the present invention. The self-ventilation property in the present mechanism means that increasing the pressure improves the airtightness of the door. Also, the airtightness of the door must be such that the airtightness inside the chamber is maintained even at low pressures, which all of these are challenges for the present mechanism, and finally, after completing the complex stages of design, design completion, and sample construction, and the results of various tests indicate the correct operation of the mechanism in practice.In addition to the above-mentioned issues, the low weight of the mechanism was also another problem considered during the design stage. Based on this requirement, samples were manufactured and subjected to functional and operational tests, the results of which indicated the complete success of the mechanism and hypotheses. On the other hand, in the conventional methods of closing the door to seal the chamber, the doors are used with multiple bolts and flanges, which in the work cycles of opening and closing the chamber door, will cause a significant amount of time to be spent in the work process and wear and tear, and most of the time, exhausting working conditions for the user and a significant decrease in the speed of the door opening and closing mechanism. These cases will also be of much greater importance when, for safety reasons, the frequent presence of the user in conditions with environmental hazards is not desirable. In many pressurized containers, containers or similar applications that require proper air tightness for various reasons, increasing the pressure inside the container leads to leakage and disrupting the proper functioning of the door. For this reason, utilizing the design and idea presented in this application is very important and significant in terms of application, since with increasing pressure, the airtightness of the container increases and the door can be closed using only one screw. It should be noted that the present design was completed successfully in response to the request of the country's industries and in the form of a joint research project at the National University of Skills of Iran, by the grace of God. A description of the state of the prior art and the history of developments related to the claimed invention. In patent number US 4,087,978, a multi-diaphragm assembly is used to achieve air tightness. In this design, the possibility of using the diaphragm in different ways is presented. Also, in patent number US 2016 / 0091095A1, a diaphragm mechanism is used to airtightly seal two fixed and movable parts on the door and flange, and of course with a simple design. In the patent number US 11,578,825 B2, sealing parts are used to connect the movable part of the door to the flange, which causes the door to be clamped. For example, this mechanism is used in some pipes for sealing in the following way. In this method, after placing the sealing part in its seat and assembling the other pipe, the two parts are fixed in their position due to the presence of a tab in the sealing part, in addition to sealing. In the patent number US 2023 / 0040488 Al, filed in 2023, the door consisted of two parts: a fixed and a movable frame, where the movable part, which is placed inside the rails, is closed after being placed in its position using the tabs located around it, and the airtight and compressed operation of the insulation is provided by the movement of the tabs inside the inclined groove. However, this design differs from the mechanism presented in this article in various aspects, which will be discussed below. In many pressurized containers, containers and similar applications where air tightness inside the container is of great importance for various reasons, increasing the pressure inside the container leads to leakage and disrupting the proper functioning of the container door in the airtight section. Also, to achieve airtightness, it is necessary to use a large number of screws to close the container doors, which is also very time-consuming. In such applications, the design and idea presented in the present application is remarkable and practical in its own right, because by increasing the pressure, the airtightness conditions of the container are improved, and in other words, increasing the pressure inside the container is used as a better airtightness. This idea was fully validated and verified in operation in manufactured and tested samples. Providing a solution to an existing technical problem along with an accurate, sufficient, and integrated description of the invention Given the operational limitations in the end-use described in the previous section, after various studies and the evolution of the design and analysis stages of different models, the design described below was finally selected, built and tested. The overall design consists of four basic parts: the chamber (100), the movable door section (200), the floating door (300), and the rubber seal (400). In this design, to facilitate testing and verify the mechanism's performance, a housing assembly (100) similar to the final application was used, which is necessary to mention at the beginning. It is obvious that the geometry of the housing can vary according to the user's final application, and this housing mentioned in this article is also used as a door adjustment platform. This housing (100) is used to adjust the different parts of the door mechanism for ease of work. For better use of the housing (100) for door adjustment, it is placed on the 4 housing bases (101) in order. If there is a need to observe and control the pressure inside the housing, a pressure display can also be used. Of course, there is no pressure display in the final samples, and the adjustments made on the door must be able to achieve the desired airtightness and the absence of leakage inside the housing. Also, to install the fixed hinge section (102) on the housing, the three fixed hinge sections (102) are placed and fixed in their desired location correctly and with assembly considerations. The floating door (301) is placed inside the chamber and in its proper direction without being connected to any other part. On the floating door (301), 8 screws with rigid connection (302) are placed in a specific position. Then, the air seal rubber (400) is also placed freely in its proper direction on the floating door (301). Then the movable part of the door (200), which also includes three movable hinge parts (201) mounted on it, is placed on the three fixed hinge parts (102) on the housing and connects the three fixed hinge parts (102) and the movable hinge part (201) together in an integrated manner by the positioning pin. Next, the movable part of the door (200) is placed on the flange edge of the housing (103) and on the floating door (301). The main screw (104) is responsible for fixing the two parts of the movable part of the door (200) and the housing (100) together. 8 adjustment joints (202), while on one side they are placed on the screw with a rigid connection (302) for correct positioning, on the other side they are placed on the movable part of the door (200) and in its proper position and are fixed by the connecting screw (203). This fixing process is completely carried out at 8 points. Now it's time to tighten the rigid connection nut (303) and pull the floating door upwards, creating initial pressure on the rubber seal (400).The tightening of the rigid connection nuts (303) is done in a coordinated manner so that the floating door (301) is uniformly and balanced in all directions, causing the air-tight rubber (400) to be adjusted for air tightness at low pressures. Now it is time to close the door with the main screw (104) and initial pressure inside the chamber. When air pressure or a special gas is injected into the chamber, the floating door (301) is moved, which causes the air-tight rubber (400) to be pressurized. At this time, an air gap is created between the rigid connection nuts (303) and the adjustment connection (202). In a case where the chamber can be moved over long distances and along specific routes, it is possible to retighten the rigid connection nuts (303) and even mark it to ensure that the door does not open along the way, even intentionally by the user, which is very necessary in some cases and applications. It is also possible to install a pressure manometer in part of the chamber to control the pressure inside the chamber. This was also installed in the manufactured and tested samples, and the test results were very successful. It should be noted that, where the production process is desired, a test chamber can be used solely for initial door adjustments to reduce initial setup time, and then the adjusted door can be installed on the main chamber. Explanation of shapes, maps and diagrams Figure 1) Overview of the final design Figure 2) Exploded view of the design Figure 3) Cutaway view of the design in a closed, pressurized state with insulation applied. Figure 4) Cutaway view of the door in two positions: the lower limit and the upper limit of the floating door movement for air sealing. A clear and precise statement of the advantages of the claimed invention over prior inventions. The present claimed invention has special distinguishing features compared to previous designs and some inventions, including the following: 1- Having a self-ventilating capability that improves airtight conditions inside the chamber by increasing pressure. 2- The overall hinged structure of the door and the door fixation with only one screw to increase the opening and closing speed of the mechanism on the other side. 3- No use of a tab mechanism around the door, unlike other patents. 4- No need to use multiple bolts and nuts that are used in conventional flange mechanisms to close the door. 5- High speed of closing the door with air sealing compared to other mechanisms. 6- Low weight of the mechanism structure (due to weight limitations in the original design) 7- Ability to adjust the amount of initial pressure applied to the rubber insulation, which provides air tightness at low pressure. 8- Ability to be manufactured with metal-composite material with the aim of further reducing weight and increasing corrosion resistance. 9- The hinge design is designed to allow the rubber seal to be pressurized when the door is closed and to apply equal pressure to the entire rubber seal. 10- The ability to lock the pressure-tight door and mark it to ensure that the door does not open and leaks occur during the transportation of the container and possible impacts to it. 11-Increase the life of the air-tight tire because it is not constantly under high pressure and when the pressure inside the chamber is released, the main pressure is removed from the tire, which leads to a longer lifespan. Description of at least one implementation method for implementing the invention The present door mechanism can be installed on containers and pressurized chambers that require air sealing and rapid adjustment and internal pressure with conditions for leak control and prevention of pressure drop inside the chamber due to shocks and shocks caused by transportation or unpredictable environmental conditions. Operational tests on the manufactured sample fully confirm the correct operation of the mechanism. Explicit mention of the industrial application of the invention Industries that specifically need to provide self-ventilating air sealing for portable pressure vessels with high compressive force, and on the other hand, due to usage restrictions, do not have the possibility to use tongue-and-groove doors with flange structures with multiple screws and heavy weight, can benefit from this mechanism for rapid self-ventilation door opening and closing. Numerous tests conducted on the manufactured sample have confirmed the reliability of the presented mechanism. It should be noted that the present presented design was successfully carried out in response to the request of the country's industries and in the form of a joint research project at the National University of Skills of Iran, by the grace of God.

Claims

Claim What is claimed: Claim 1) A self-ventilating door device for low-pressure gas tanks, which has two sections: a movable door and a flanged section of the chamber, where the movable door section is closed by three movable and fixed hinges on the flanged section of the chamber on one side and on the other side by a main door screw that is also installed on a floating rubber insulating door with a specific cross-section so that by applying pressure inside the tank, by moving the adjustable floating door section embedded on the movable door section, the insulating rubber is allowed to be pressurized, which increases the degree of insulation of the chamber with increasing pressure and includes the following sections: Moving door section Flange section of the chamber Floating door section Connecting screws Connecting nuts Adjusting bases Fixed hinge section Moving hinge section Special airtight rubber Main screw Claim 2) Following claim 1, the floating door is able to move linearly and in line with the chamber through the connecting screws that pass through the adjustment legs of the movable door section. If the pressure inside the tank is removed and the floating section is released, the connecting nuts are placed on the adjustment legs and prevent the floating door section from separating from the movable door.

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