Leakage-proof self-sealing device of pressure container

Abstract

The utility model provides an anti-leakage self-sealing device for a pressure container. The anti-leakage self-sealing device comprises a gas phase valve, a gas phase balance valve, a steel pipe, a porous upper partition plate, a porous steel pipe section, a porous lower partition plate and a liquid phase valve. The gas-phase valve is mounted at the upper end of the steel pipe; a dumbbell-shaped sealing ball is arranged between the porous upper partition plate and the porous lower partition plate, the porous upper partition plate, the dumbbell-shaped sealing ball and the porous lower partition plate are all installed in the steel pipe, the porous steel pipe section is located at the lower end of the steel pipe, and the porous lower partition plate is located at the bottom of the steel pipe. The right side of the steel pipe is connected with a first branch pipe which is provided with a gas phase balance valve; the left side of the porous steel pipe section is connected with a second branch pipe of which the lower end is provided with a liquid-phase valve. The utility model relates to the field of pressure vessel engineering, and the device adopts a purely mechanical plugging principle, does not participate in any additional chemical substances, does not generate secondary pollution in the plugging process, greatly simplifies the emergency procedure, and reduces the pollution to the environment.

Description

Technical Field

[0001] The utility model relates to the field of pressure vessel engineering, in particular to a leakage-proof self-sealing device for a pressure vessel. Background Art

[0002] Currently, there are two main emergency response measures for leakage of inlet and outlet valves of pressure vessels. One is high-pressure water injection, and the other is glue injection sealing.

[0003] (1) High-pressure water injection process

[0004] For substances like LPG (liquefied petroleum gas), which are not miscible with water but can be clearly separated into layers after mixing with water, the high-pressure water injection method can be used. The inlet and outlet pipes of the pressure vessel are generally extended into the inner bottom of the container. After the container is filled with water, the bottom area is water. During the continuous water injection process, the substance leaked from the container to the outside is mainly water, thereby buying time for rescue. However, this process has the following six main problems: First, the pressure inside the container itself is relatively high. The pressure of high-pressure water injection is higher than the pressure inside the container. The water injection process will further increase the pressure inside the pressure vessel and increase the emission of the gas phase, which is not conducive to the control of the hazard source; second, it is impossible to accurately judge when the water injection is completed. Insufficient water injection will not be able to isolate the leakage of dangerous sources, while excessive water injection will cause the risk of overflow of dangerous sources; third, when the leakage point is an external valve, it can be quickly replaced. If the leakage point is the pipe between the container and the first valve, it cannot be replaced in a short time; fourth, the leaked water in the water injection protection process needs to be collected and processed, which increases the complexity of the entire rescue and the risk of expanding pollution sources; fifth, this method cannot be applied to many dangerous chemicals that can react or dissolve with water, or have a density similar to that of water; sixth, during the high-pressure water injection process, the inside of the container will churn up and down due to the injection of high-pressure water, so the substance discharged from the container is likely to be water carrying chemicals.

[0005] (2) Glue injection and plugging process

[0006] For the leaking part, a mold is added and fixed, and then glue is injected to seal it. This method is restricted by two factors. First, if the pressure at the leaking part is too high and the leakage is too large, there is a high risk of personnel approaching the leaking part. Second, whether the leaking part can be tightly fixed with the mold, there are problems of "glue leakage" and poor sealing. In addition to the two points mentioned above, the biggest problem is that the entire rescue process takes a long time. Until the glue is completely solidified, the dangerous source is always in a state of leakage and expansion, and the rescue personnel are always in a high concentration of leaked materials. Summary of the invention

[0007] In view of this, the utility model aims to propose a pressure vessel leakage prevention self-sealing device, which adopts a purely mechanical sealing principle without the involvement of any external chemical substances, and will not generate secondary pollution during the sealing process, thereby greatly simplifying the emergency procedures and reducing pollution to the environment.

[0008] In order to achieve the above object, the technical solution of the utility model is implemented as follows:

[0009] A pressure vessel anti-leakage self-sealing device, comprising a gas phase valve, a gas phase balance valve, a steel pipe, a porous upper baffle, a porous steel pipe section, a porous lower baffle and a liquid phase valve, wherein the gas phase valve is installed at the upper end of the steel pipe;

[0010] A dumbbell-shaped sealing ball is provided between the porous upper baffle and the porous lower baffle. The porous upper baffle, the dumbbell-shaped sealing ball and the porous lower baffle are all installed inside the steel pipe. The porous steel pipe section is located at the lower end of the steel pipe, and the porous lower baffle is located at the bottom of the steel pipe.

[0011] The right side of the steel pipe is connected to a first branch pipe, and a gas phase balance valve is installed on the first branch pipe;

[0012] The left side of the porous steel pipe section is connected with a second branch pipe, and the lower end of the second branch pipe is provided with a liquid phase valve.

[0013] Furthermore, the dumbbell-shaped sealing ball includes an upper hemisphere, a connecting rod and a lower hemisphere, and the upper hemisphere and the lower hemisphere are each a section of a cylinder.

[0014] Furthermore, the upper hemisphere and the lower hemisphere are made of elastic sealing material, and the outer diameters of the upper hemisphere and the lower hemisphere are slightly larger than the inner diameter of the steel pipe.

[0015] Compared with the prior art, the utility model has the following advantages:

[0016] It is easy to operate. When rescue is needed, you only need to open the gas phase valve to use the internal pressure to achieve self-sealing of the container. The self-sealing device acts quickly to minimize the spread of dangerous sources. The sealing effect is reliable and intuitive. Rescue workers approach the location of the container's discharge pipe rather than the leakage site of the container, which greatly reduces the risks faced by rescue workers. The sealing device can be permanently sealed with one action until the operator manually resets it, and does not require continuous assistance from an external system, which buys more time for repairing the leakage point. The sealing device can be used repeatedly, and the device itself and the container body are not damaged before and after the action. The device is not limited by the type and physical and chemical properties of hazardous chemicals, has a wide range of applications, and can be used for leak-proof sealing of all pressurized containers. The device adopts a purely mechanical sealing principle, without the participation of any external chemical substances, and will not produce secondary pollution during the sealing process, which greatly simplifies the rescue procedure and reduces pollution to the environment. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The accompanying drawings constituting a part of the present invention are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention. In the accompanying drawings:

[0018] Figure 1 This is a structural diagram of the anti-leakage self-sealing device for a pressure vessel according to an embodiment of the utility model;

[0019] Figure 2 The pressure vessel in the embodiment of the utility model is in normal working state. Figure 1 A magnified view of part A;

[0020] Figure 3 The pressure vessel anti-leakage self-sealing device according to the embodiment of the utility model is in the state after being actuated. Figure 1 A magnified view of part A;

[0021] Figure 4 This is a structural diagram of a dumbbell-shaped sealing ball according to an embodiment of the utility model;

[0022] Figure 5 This is a structural diagram of a steel pipe and a porous pipe section according to an embodiment of the utility model;

[0023] Description of reference numerals:

[0024] 1. Gas phase valve; 2. Gas phase balancing valve; 3. Steel pipe; 4. Porous upper baffle; 5. Dumbbell-shaped sealing ball; 6. Porous steel pipe section; 7. Porous lower baffle; 8. Liquid phase valve; 501. Upper hemisphere; 502. Connecting rod; 503. Lower hemisphere. DETAILED DESCRIPTION

[0025] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other.

[0026] In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "back" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0027] The present invention will be described in detail below with reference to the accompanying drawings and in combination with embodiments.

[0028] The present embodiment relates to a pressure vessel anti-leakage self-sealing device, which is a purely mechanical plugging principle without the involvement of any external chemical substances. No secondary pollution will be generated during the plugging process, which greatly simplifies the emergency procedures and reduces pollution to the environment.

[0029] Based on the above design concept, an exemplary structure of the pressure vessel anti-leakage self-sealing device of this embodiment is as follows: Figure 1-Figure 5 As shown, it mainly includes a gas phase valve 1, a gas phase balancing valve 2, a steel pipe 3, a porous upper baffle 4, a porous steel pipe section 6, a porous lower baffle 7 and a liquid phase valve 8. The gas phase valve 1 is installed at the upper end of the steel pipe 3; a dumbbell-shaped sealing ball 5 is provided between the porous upper baffle 4 and the porous lower baffle 7, the porous upper baffle 4, the dumbbell-shaped sealing ball 5 and the porous lower baffle 7 are all installed inside the steel pipe 3, the porous steel pipe section 6 is located at the lower end of the steel pipe 3, and the porous lower baffle 7 is located at the bottom of the steel pipe 3; the first branch pipe is connected to the right side of the steel pipe 3, and the gas phase balancing valve 2 is installed on the first branch pipe; the second branch pipe is connected to the left side of the porous steel pipe section 6, and a liquid phase valve 8 is provided at the lower end of the second branch pipe.

[0030] Specifically, the pressure vessel leakage prevention self-sealing device of this embodiment is installed in the pressure vessel, the steel pipe 3 extends into the interior of the pressure vessel, the first branch pipe and the gas phase balance valve 2 installed on the first branch pipe are located outside the pressure vessel, the lower end of the second branch pipe extends out of the pressure vessel, and the liquid phase valve 8 is located outside the pressure vessel.

[0031] By providing a porous upper baffle 4 and a porous lower baffle 7 in the steel pipe 3, the position of the dumbbell-shaped sealing ball 5 before and after the movement can be limited, and at the same time, it can also ensure that the gas phase and liquid phase media can pass through the porous upper baffle 4 and the porous lower baffle 7; by providing a porous steel pipe section 6 at the lower end of the steel pipe 3, so that when the container is in a normal working state of liquid flowing out, the porous steel pipe section 6 can ensure that the liquid can flow out normally on the one hand, and on the other hand, balance the pressure on both sides of the upper hemisphere 501 of the dumbbell-shaped sealing ball 5 to keep the position of the dumbbell-shaped sealing ball 5 stable and not moving.

[0032] By setting the gas phase valve 1 in the closed state and the gas phase balance valve 2 in the open state, the internal space of the steel pipe 3 can be connected with the internal space of the pressure vessel. Together with the setting of the porous steel pipe section 6 mentioned above, the pressure balance on both sides of the upper hemisphere 501 of the dumbbell-shaped sealing ball 5 can be achieved when the pressure vessel is in the working state.

[0033] The cooperation between the open state of the gas phase valve 1 and the closed state of the gas phase balance valve 2 can form a pressure difference between the upper and lower surfaces of the upper hemisphere 501 of the dumbbell-shaped sealing ball 5, pushing the dumbbell-shaped sealing ball 5 to perform a sealing action.

[0034] The dumbbell-shaped sealing ball 5 includes an upper hemisphere 501, a connecting rod 502 and a lower hemisphere 503, wherein the upper hemisphere 501 and the lower hemisphere 503 are each a section of a cylinder; the upper hemisphere 501 and the lower hemisphere 503 are made of a relatively soft elastic sealing material, the outer diameters of the upper hemisphere 501 and the lower hemisphere 503 are slightly larger than the inner diameter of the steel pipe 3, and the upper hemisphere 501 and the lower hemisphere 503 are connected by a metal connecting rod 502 with a rigid end; the dumbbell-shaped sealing ball 5 is in close contact with the steel pipe 3 through the elastic deformation of the upper hemisphere 501 and the lower hemisphere 503 themselves; and the dumbbell-shaped sealing ball 5 is pushed to move in the steel pipe 3 through the change in pressure at both ends of the upper hemisphere 501 and the lower hemisphere 503.

[0035] The pressure vessel anti-leakage self-sealing device described in this embodiment includes three working states when in use: normal working liquid discharge state, plugging device action when leakage occurs, and plugging device reset after the danger is eliminated. Normal working liquid discharge state: when the gas phase valve 1 is closed, the gas phase balance valve 2 is opened, and the dumbbell-shaped sealing ball 5 is in Figure 2 In the position shown, the lower hemisphere 503 is connected to the internal space of the pressure vessel through the porous lower partition 7, the upper hemisphere 501 is connected to the interior of the pressure vessel through the gas phase balance valve 2, and the upper hemisphere 501 and the lower hemisphere 503 are connected to the interior of the pressure vessel through the porous steel pipe section 6. At this time, the dumbbell-shaped sealing ball 5 is in a force balance state, and the liquid in the pressure vessel can enter and exit the pressure vessel normally through the porous steel pipe section 6, the liquid phase valve 8 and the second branch pipe between the two.

[0036] Action of the plugging device in case of leakage: When leakage occurs at the liquid phase valve 8, the on-site operator only needs to manually close the gas phase balance valve 2 and then open the gas phase valve 1. At this time, the interior of the steel pipe 3 is connected to the atmosphere, so that a pressure difference is formed between the upper and lower surfaces of the upper hemisphere 501 of the dumbbell-shaped sealing ball 5. Driven by the upper hemisphere 501, the entire dumbbell-shaped sealing ball 5 is pushed upward until Figure 3 In the position shown, the upper hemisphere 501 is stuck by the porous upper partition 4, and the lower hemisphere 503 just blocks the porous steel pipe section 6, thereby achieving the sealing of the liquid phase.

[0037] After the danger is eliminated, the plugging device is reset: When the valves and pipelines connected to the outside of the pressure vessel are repaired, with the gas phase valve 1 open and the gas phase balance valve 2 closed, high-pressure nitrogen is filled into the steel pipe 3 through the vent port to make the dumbbell-shaped sealing ball 5 return to the Figure 2 In the position shown, the lower hemisphere 503 is stuck by the porous lower partition 7, and then the operator only needs to manually close the gas phase valve 1 and then open the gas phase balance valve 2, and the device will re-enter the "normal working liquid discharge state".

[0038] The pressure vessel leakage prevention self-sealing device using the above-mentioned implementation scheme can well realize the self-sealing of the container, and is easy to operate. When emergency rescue is needed, it is only necessary to open the gas phase valve 1 to utilize the internal pressure to realize the self-sealing of the container; the self-sealing device acts quickly and minimizes the spread of dangerous sources; the sealing effect is reliable and intuitive; the rescue personnel approach the location of the discharge pipe of the container rather than the leakage part of the container, which greatly reduces the risks faced by the rescue personnel; the sealing device can be permanently sealed with one action until the operator manually resets it, and does not require continuous assistance from an external system, which buys more time for repairing the leakage point; the sealing device can be reused repeatedly, and the device itself and the container body are not damaged before and after the action; the device is not limited by the type and physical and chemical properties of hazardous chemicals, has a wide range of applications, and can be applied to the leakage prevention sealing of all pressurized containers; the device adopts a purely mechanical blocking principle, without the participation of any external chemical substances, and no secondary pollution will be generated during the blocking process, which greatly simplifies the rescue procedure and reduces pollution to the environment.

[0039] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A pressure vessel anti-leakage self-sealing device, comprising a gas phase valve (1), a gas phase balancing valve (2), a steel pipe (3), a porous upper baffle (4), a porous steel pipe section (6), a porous lower baffle (7) and a liquid phase valve (8), characterized in that: The gas phase valve (1) is installed at the upper end of the steel pipe (3); A dumbbell-shaped sealing ball (5) is provided between the porous upper baffle (4) and the porous lower baffle (7); the porous upper baffle (4), the dumbbell-shaped sealing ball (5) and the porous lower baffle (7) are all installed inside the steel pipe (3); the porous steel pipe section (6) is located at the lower end of the steel pipe (3); and the porous lower baffle (7) is located at the bottom of the steel pipe (3); The right side of the steel pipe (3) is connected to a first branch pipe, and a gas phase balancing valve (2) is installed on the first branch pipe; The left side of the porous steel pipe section (6) is connected to a second branch pipe, and the lower end of the second branch pipe is provided with a liquid phase valve (8).

2. The anti-leakage self-sealing device for a pressure vessel according to claim 1, characterized in that: The dumbbell-shaped sealing ball (5) comprises an upper hemisphere (501), a connecting rod (502) and a lower hemisphere (503), wherein the upper hemisphere (501) and the lower hemisphere (503) are each a section of a cylinder.

3. The anti-leakage self-sealing device for a pressure vessel according to claim 2, characterized in that: The upper hemisphere (501) and the lower hemisphere (503) are made of elastic sealing material, and the outer diameters of the upper hemisphere (501) and the lower hemisphere (503) are slightly larger than the inner diameter of the steel pipe (3).

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