Pressure vessel capable of displaying filling state

Abstract

The invention provides a pressure vessel capable of displaying a filling state, which comprises a vessel body and a valve, the valve is mounted at the top of the vessel body, the pressure vessel also comprises an anti-explosion sheet, the anti-explosion sheet is fixedly mounted at the upper end of the vessel body, an indicating device is fixedly mounted on the anti-explosion sheet, the indicating device comprises an indicating lamp and an indicating lamp switch, and the indicating lamp switch is connected with the indicating lamp. The indicator light switch is electrically connected with the indicator light, the indicator light switch is located above the anti-explosion piece, when the container body is not filled with the medium, the anti-explosion piece is concaved into the container body, and when the container body is gradually filled with the medium, the anti-explosion piece protrudes outwards and makes contact with the indicator light switch. According to the scheme, the characteristics of the anti-explosion piece are utilized, so that the pressure container has the pressure relief and warning functions, the structures such as the pre-fracture groove and the microswitch are matched, repeated filling of the container is avoided, and safety is guaranteed.

Description

Technical Field

[0001] The invention belongs to the technical field of pressure vessels, and in particular relates to a pressure vessel capable of displaying a filling status. Background Art

[0002] Pressure vessels are closed containers that can withstand pressure and are widely and importantly used in many fields such as industrial production, energy supply, medical care, scientific research, etc. Since they usually store high-pressure or high-temperature media, they have extremely high requirements for safety and reliability.

[0003] In the use of pressure vessels, preventing double filling is a crucial issue. Repeated filling may bring many safety hazards. For example, pressure vessels that have been used many times may have problems such as internal corrosion, material fatigue, and seal failure. If they continue to be filled, the container may not be able to withstand the pressure and may rupture, explode, and other accidents. In addition, repeated filling may also lead to the mixing of different gases, triggering chemical reactions, further increasing safety risks. Therefore, in order to ensure the safe use of pressure vessels, preventing double filling is an indispensable measure.

[0004] Existing anti-refilling technology generally involves structural improvements on valves. For example, the Chinese utility model patent with patent number 201720899198.0 discloses a non-refillable sulfur dioxide cylinder. This patent prevents secondary inflation by setting a flange inside the valve. The inner diameter of the flange is smaller than the diameter of the valve core. After filling, the valve stem pushes the valve core over the flange, so that the valve core can only move in a specific space below the flange. With the I-shaped valve core design with a notch on the top, the gas in the bottle flows out through the notch when in use. After the gas is used up, secondary inflation will cause the valve core to block the air inlet due to the pressure outside the bottle being greater than that inside the bottle, preventing gas from being filled in.

[0005] However, during long-term use, the seal between the valve core and the air inlet port is susceptible to corrosion and wear, resulting in a loose seal, which provides an opportunity for criminals to perform secondary inflation. Therefore, it is not suitable for scenarios that require long-term storage or frequent use. Summary of the invention

[0006] The present invention proposes a pressure vessel capable of displaying the filling status. The characteristics of the explosion-proof disk are utilized to enable the pressure vessel to have pressure relief and warning functions. Combined with structures such as a pre-rupture groove and a micro switch, repeated filling of the container is avoided, thereby ensuring safety.

[0007] In order to solve the above technical problems, the technical solution of the present invention is:

[0008] A pressure vessel capable of displaying a filling status comprises a container body and a valve, wherein the valve is mounted on the top of the container body, and further comprises a burst-proof disc, wherein the burst-proof disc is fixedly mounted on the upper end of the container body, and an indicating device is fixedly mounted on the burst-proof disc, wherein the indicating device comprises an indicator light and an indicator light switch, wherein the indicator light switch is electrically connected to the indicator light, and wherein the indicator light switch is located above the burst-proof disc, wherein when the container body has not been filled with a medium, the burst-proof disc is recessed into the container body, and when the container body is gradually filled with a medium, the burst-proof disc will bulge outward and contact the indicator light switch.

[0009] It is a common practice to set explosion-proof discs on pressure vessels, because during the operation of pressure vessels, the internal pressure may rise sharply due to various reasons (such as operating errors, uncontrolled chemical reactions, failure of pressure regulating devices, etc.). When the pressure exceeds the design pressure of the container, the container may rupture, explode, and other serious accidents. The explosion-proof disc can rupture when the pressure reaches the set critical value, release the pressure in the container, prevent the container from being damaged due to overpressure, and thus protect the safety of equipment and personnel. The present invention utilizes the characteristics of the explosion-proof disc to warn the filling status and prevent disposable pressure vessels from being refilled.

[0010] The principle of the present invention is that for a pressure vessel that has never been filled with a medium, the explosion-proof disc installed thereon is recessed into the container body. When the pressure vessel that has never been filled with a medium is filled with a medium for the first time, since there is basically no medium in the container body at this time, it is in a relatively stable state, so when the medium is filled, the pressure in the container body will gradually and steadily increase until the container body is filled. In this process, the explosion-proof disc will gradually protrude outward and contact the indicator light switch, thereby realizing the control of the indicator light state. For example, when the explosion-proof disc does not contact the indicator light switch, the indicator light is in an off state. When the explosion-proof disc contacts the indicator light switch, the indicator light will be in a lighted state to indicate whether the pressure vessel is filled with a medium; and since the explosion-proof disc is generally made of a material with a certain plastic deformation ability but a weak elastic recovery ability (such as aluminum or copper), and there is also pressure in the container, the explosion-proof disc will generally not rebound and recess into the container body after protruding outward, so when the container body is filled with the medium, the indicator light will be in a constant light state to remind and warn that the pressure vessel cannot be refilled. If filling continues after the indicator light comes on, the pressure inside the container will exceed the design pressure of the bursting disk, and the bursting disk will rupture, causing the container to leak and prevent the container from exploding.

[0011] Importantly, the present invention can further prevent repeated filling. The principle is: when the medium in the container is "used up" (due to factors such as the adsorption of the medium on the inner wall of the container and the small amount of medium remaining at the valve seal, the container cannot completely empty the internal medium), a small amount of medium will still remain in the container, and these residual media themselves have a certain pressure and energy. Therefore, when someone tries to refill the container with new medium, the newly filled medium will mix with the residual medium, just like two systems with different energy states interacting with each other; the pressure of the residual medium will hinder the diffusion of the newly filled medium, so that the new medium cannot be distributed smoothly and evenly as in an empty container; this hindering effect will cause the medium to accumulate in a local area, forming a higher pressure area, which will cause the pressure in the entire container to rise sharply instantly; at the same time, the newly filled medium will compress the original residual medium. In this rapid compression process, the distance between the medium molecules decreases rapidly, and the repulsion between the molecules increases, causing the pressure of the medium to rise rapidly. This will cause the pressure inside the container to exceed the bursting pressure set by the explosion-proof disk, thereby causing the explosion-proof disk to rupture, causing the container body to leak, and then the pressure vessel will be scrapped, while also effectively preventing the pressure vessel from exploding.

[0012] It is worth mentioning that the present invention cleverly uses the convex characteristics of the explosion-proof disc under pressure to control the indicator light. During filling, the convexity of the explosion-proof disc touches the indicator light switch above, and the indicator light lights up, intuitively showing that the filling is complete. Since the explosion-proof disc is not easy to rebound after protruding, the indicator light will always be on to warn that the container has been filled, effectively preventing repeated filling. The design has a simple structure, low cost, high stability, and is also very practical in pressure vessel filling scenarios.

[0013] It should be noted that, in the present invention, "the container is filled with the medium" means that the inside of the container is filled with the medium to a state close to its maximum capacity, but does not mean that the container is completely filled. Specifically, a certain space (such as a gas phase space or a buffer space) may be reserved inside the container to meet specific process requirements, safety standards or physical properties of the medium.

[0014] In order to accurately control the rupture process of the explosion-proof disk, the present invention provides the following two preferred solutions:

[0015] Solution 1: The explosion-proof disc is provided with an arc-shaped pre-rupture groove, and the arc-shaped pre-rupture groove is located at the edge of the explosion-proof disc. The pre-rupture groove is a weak area pre-designed on the explosion-proof disc. When the pressure reaches the set threshold, these areas will deform and rupture preferentially. In Solution 1 of the present invention, an arc-shaped pre-rupture groove is provided on the edge of the explosion-proof disc, so that when the explosion-proof disc is under pressure, it can accurately start to rupture from the pre-rupture groove on the edge. Compared with explosion-proof discs without pre-rupture grooves, the starting point of rupture under pressure is difficult to predict, and this design of Solution 1 can ensure that the rupture position is fixed, which helps to ensure that when pressure relief is required, the pressure can be released in an orderly manner from the predetermined position, avoiding uneven pressure release due to random rupture positions or causing additional impact on other parts of the container. Moreover, the arc-shaped shape design is conducive to the diffusion of pressure along a specific arc direction, making the pressure release smoother.

[0016] Solution 2: The explosion-proof disc is provided with a plurality of cross-shaped pre-rupture grooves, and the plurality of cross-shaped pre-rupture grooves are arranged at intervals along the circumference of the explosion-proof disc. The plurality of cross-shaped pre-rupture grooves are arranged at intervals along the circumference of the explosion-proof disc, so that when the explosion-proof disc is ruptured under pressure, the pressure can be released more evenly from multiple positions. This can avoid the pressure being concentrated in a certain place, thereby making the rupture process of the entire explosion-proof disc more stable and reducing the impact on the pressure vessel body and surrounding equipment. Moreover, due to the presence of multiple pre-rupture grooves, when the pressure reaches a certain level, multiple parts rupture simultaneously or successively, which speeds up the pressure relief speed. Compared with Solution 1, during the pressure relief process of the explosion-proof disc of Solution 2, the pressure can be released simultaneously from multiple cross-shaped pre-rupture grooves arranged at intervals along the circumference. This multi-channel pressure relief method can effectively disperse the pressure, so that when the explosion-proof disc is relieved, the whole or most of it will not be pushed out by the high-pressure medium. In Solution 1, the explosion-proof disc only starts to rupture from the arc-shaped pre-rupture groove at the edge, and the pressure release is relatively concentrated, which is more likely to cause the explosion-proof disc to be pushed out over a larger area. Once the explosion-proof disk is completely or mostly pushed out, it is very likely to hit the indicator device above, causing the indicator device to fly out or break, posing a serious safety hazard. Solution 2 significantly reduces such risks through the design of multi-position dispersed pressure relief, and is safer.

[0017] Preferably, the indicator light switch is a micro switch, which includes a driving rod and a switch body, one end of the driving rod is connected to the switch body, and the other end of the driving rod is suspended, and the driving rod is located above the explosion-proof disc. When the explosion-proof disc protrudes outward, the driving rod can move under the drive of the explosion-proof disc. It should be noted that the micro switch used is a common product on the market. In this way, in the process of the explosion-proof disc protruding outward, it will first contact the driving rod and continue to move outward against the driving rod, and a contact is provided on the switch body of the micro switch, and the contact is usually in a normally open (or normally closed) state. In the process of the explosion-proof disc protruding outward, the driving rod will gradually approach the contact; when the container body is filled, the explosion-proof disc is completely protruding and causes the driving rod to press the contact, and the state of the contact changes (normally open becomes closed, or normally closed becomes disconnected), thereby changing the circuit state and realizing the control of the indicator light display or on and off. It is worth mentioning that the micro switch has the characteristics of sensitive action and fast response speed, so when the explosion-proof plate bulges outward due to changes in pressure in the container, it can quickly push the drive rod to move. Once the drive rod is pressed against the contact on the switch body, the circuit state can be changed in a timely and accurate manner to achieve precise control of the indicator light display or on and off. This precise control can provide operators with accurate signals, allowing them to clearly understand the filling status of the pressure vessel, avoid operational errors caused by misjudgment, and improve the safety and reliability of the entire filling process. Ordinary mechanical switches may require a large displacement or a strong external force to change the state, and it is difficult to accurately capture the subtle changes in the explosion-proof plate, and the safety and reliability are poor.

[0018] Among them, the driving rod is a roller lever type driving rod, and the roller lever type driving rod includes a lever and a roller, one end of the lever is fixedly connected to the switch body, and the roller is rotatably installed on the other end of the lever, and when the explosion-proof plate bulges outward, the roller contacts the explosion-proof plate. The roller in the roller lever type driving rod can convert the sliding friction between the original driving rod and the explosion-proof plate into rolling friction, which greatly reduces the friction between the two, avoids the surface wear of the explosion-proof plate, and ensures the stable performance of the explosion-proof plate; at the same time, the design of the roller makes the contact between the explosion-proof plate and the driving rod smoother, which can ensure that the explosion-proof plate can easily push the driving rod when it bulges outward, avoid jamming, and ensure the smoothness, stability and response accuracy of the entire system. Moreover, compared with ordinary driving rods, the roller can better maintain good contact with the explosion-proof plate at different angles and positions, ensuring that when the explosion-proof plate bulges, it can effectively push the driving rod and trigger the micro switch action.

[0019] Preferably, a mounting portion is provided on the container body, and the explosion-proof disk is fixedly connected to the mounting portion, so that the explosion-proof disk can be firmly mounted on the container body to accurately reflect the change of the pressure of the container body.

[0020] Preferably, the indicator light includes a lampshade, a light emitter, a controller and a power supply, the micro switch, the light emitter and the power supply are all electrically connected to the controller, the micro switch, the light emitter, the controller and the power supply are all installed in the lampshade, and the lampshade is fixedly installed on the mounting portion. In this way, the indicator light can be integrated into the explosion-proof disk, so as to sense the movement changes of the explosion-proof disk more quickly and accurately. Moreover, after such integration, the overall volume can be effectively reduced, and the structure is more compact.

[0021] The lampshade is provided with a through hole. When the explosion-proof disc ruptures and releases pressure, the medium in the container will generate a large impact force. After the through hole is provided on the lampshade, the medium can overflow from the through hole, effectively dispersing the impact force. This avoids the concentrated impact of the medium on the indicator light and other components in the lampshade, prevents the indicator light and other components from flying out or bouncing off due to the impact force, and improves safety.

[0022] Preferably, a card slot is provided in the lampshade, and the controller is fixedly installed in the card slot. In this way, the controller can be firmly fixed in the lampshade to avoid loosening caused by the explosion-proof disk, micro switch or the overall vibration of the container body. If the controller is loose, it may cause the indication device to malfunction, making it impossible for the operator to accurately obtain the filling status information of the container, thereby causing safety problems such as repeated filling and overpressure. Therefore, the design of fixing the controller with a card slot can effectively ensure the stable operation of the indication device and improve the safety and reliability of the entire anti-refilling system.

[0023] Preferably, a buffer pad is fixedly mounted on the side of the explosion-proof disc facing the micro switch. The buffer pad can absorb part of the impact force when the explosion-proof disc bulges outward and contacts the driving rod, reducing the direct impact on the micro switch, thereby protecting the micro switch from damage.

[0024] In summary, such a pressure vessel that can display the filling status utilizes the characteristics of the explosion-proof disk itself to enable the pressure vessel to have pressure relief and warning functions. Combined with the pre-rupture groove, micro switch and other structures, it avoids repeated filling of the container and ensures safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the embodiments of the present invention 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 only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0026] Figure 1 It is a schematic diagram of the overall structure of the pressure vessel capable of displaying the filling status according to the present invention;

[0027] Figure 2A partial cross-sectional view of the pressure vessel capable of displaying the filling state according to the present invention;

[0028] Figure 3 It is a schematic diagram of explosion of the indicating device and the explosion-proof disk in the pressure vessel capable of displaying the filling status according to the present invention;

[0029] Figure 4 It is a working schematic diagram of the explosion-proof disk and the micro switch in the pressure vessel capable of displaying the filling status according to the present invention;

[0030] Figure 5 It is a structural schematic diagram of Example 1;

[0031] Figure 6 This is a schematic diagram of the structure of Example 2.

[0032] In the figure,

[0033] 1-container body; 11-installation portion;

[0034] 2- Valve;

[0035] 3-explosion-proof disc; 31-arc-shaped pre-rupture groove; 32-cross-shaped pre-rupture groove;

[0036] 4-indicator; 41-indicator; 411-lamp cover; 412-illuminant; 413-controller; 414-power supply; 415-through hole; 42-indicator switch; 421-micro switch; 422-driving rod; 423-switch body; 424-roller lever type driving rod; 4241-lever; 4242-roller;

[0037] 5- Cushion. DETAILED DESCRIPTION

[0038] The specific embodiments of the present invention are further described below in conjunction with the accompanying drawings. It should be noted that the description of these embodiments is used to help understand the present invention, but does not constitute a limitation of the present invention. In addition, the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0039] Reference Figure 1 , Figure 2 and Figure 3As shown, a pressure vessel capable of displaying a filling status comprises a container body 1 and a valve 2, wherein the valve 2 is mounted on the top of the container body 1, and further comprises a burst-proof disc 3, wherein the burst-proof disc 3 is fixedly mounted on the upper end of the container body 1, and an indicating device 4 is fixedly mounted on the burst-proof disc 3, wherein the indicating device 4 comprises an indicator light 41 and an indicator light switch 42, wherein the indicator light switch 42 is electrically connected to the indicator light 41, and the indicator light switch 42 is located above the burst-proof disc 3. When the container body 1 has not been filled with a medium, the burst-proof disc 3 is recessed in the container body 1, and when the container body 1 is gradually filled with a medium, the burst-proof disc 3 will bulge outward and contact the indicator light switch 42.

[0040] It is a common method to set a bursting disc 3 on a pressure vessel, because during the operation of the pressure vessel, the internal pressure may rise sharply due to various reasons (such as operating errors, uncontrolled chemical reactions, failure of the pressure regulating device, etc.). When the pressure exceeds the design pressure of the container, the container may rupture, explode, and other serious accidents. The bursting disc 3 can rupture when the pressure reaches the set critical value, release the pressure in the container, prevent the container from being damaged due to overpressure, and thus protect the safety of equipment and personnel. The present invention utilizes the characteristics of the bursting disc 3 to warn the filling status and prevent the disposable pressure container from being refilled.

[0041] The principle of the present invention is that for a pressure vessel that has never been filled with a medium, the explosion-proof disc 3 installed thereon is recessed into the container body 1. When a pressure vessel that has never been filled with a medium is filled with a medium for the first time, since there is basically no medium in the container body 1 at this time and it is in a relatively stable state, when the medium is filled, the pressure in the container body 1 will gradually and steadily increase until the container body 1 is filled. During this process, the explosion-proof disc 3 will gradually protrude outward and contact the indicator light switch 42, thereby realizing the control of the state of the indicator light 41. For example, when the explosion-proof disc 3 does not contact the indicator light switch 42, the indicator light 41 is in an off state. When the explosion-proof disc 3 contacts the indicator light switch 42, the indicator light 41 will be in a lighted state to indicate whether the pressure vessel is filled with medium. Moreover, since the explosion-proof disc 3 is generally made of a material with a certain plastic deformation ability but a weak elastic recovery ability (such as aluminum or copper), and there is also pressure in the container, the explosion-proof disc 3 will not rebound to the container body 1 after protruding outward. Therefore, when the container body 1 is filled with medium, the indicator light 41 will be in a state of constant light to remind and warn that the pressure vessel cannot be refilled. If the indicator light 41 is lit and the filling continues, then because the pressure in the container exceeds the design pressure of the explosion-proof disc 3, the explosion-proof disc 3 will rupture, causing the container to leak and prevent the container from bursting.

[0042] Importantly, the present invention can further prevent repeated filling. The principle is: when the medium in the container body 1 is "used up" (due to factors such as the adsorption of the medium on the inner wall of the container and the small amount of medium remaining at the sealing part of the valve 2, the container cannot completely empty the internal medium), a small amount of medium will still remain in the container body 1, and these residual media themselves have certain pressure and energy. Therefore, when someone tries to refill the container with new medium, the newly filled medium will mix with the residual medium, just like two systems with different energy states interacting with each other; the pressure of the residual medium will hinder the diffusion of the newly filled medium, so that the new medium cannot be smoothly and evenly distributed as in an empty container; this hindering effect will cause the medium to accumulate in a local area, forming a higher pressure area, which will cause the pressure in the entire container to rise sharply instantly; at the same time, the newly filled medium will compress the original residual medium. In this rapid compression process, the distance between the medium molecules decreases rapidly, and the repulsion between the molecules increases, causing the pressure of the medium to rise rapidly. This will cause the pressure in the container to exceed the bursting pressure set by the explosion-proof disc 3, thereby causing the explosion-proof disc 3 to rupture, causing the container body 1 to leak, thereby making the pressure container scrapped, and at the same time effectively preventing the pressure container from exploding.

[0043] It is worth mentioning that the present invention cleverly uses the convex characteristics of the explosion-proof disc 3 under pressure to control the indicator light 41 to light up. During filling, the explosion-proof disc 3 convexly touches the upper indicator light switch 42, and the indicator light 41 lights up, intuitively showing that the filling is complete. Since the explosion-proof disc 3 is not easy to rebound after convex, the indicator light 41 will always be on to warn that the container has been filled, effectively preventing repeated filling. The design has a simple structure, low cost, high stability, and is also very practical in the pressure vessel filling scenario.

[0044] It should be noted that, in the present invention, "the container body 1 is filled with the medium" means that the inside of the container body 1 is filled with the medium to a state close to its maximum capacity, but does not mean that the container body 1 is completely filled. Specifically, a certain space (such as a gas phase space or a buffer space) may be reserved inside the container body 1 to meet specific process requirements, safety standards or physical properties of the medium.

[0045] In order to accurately control the rupture process of the explosion-proof disk 3, the present invention provides the following two embodiments:

[0046] Example 1: Reference Figure 5As shown, the explosion-proof disc 3 is provided with an arc-shaped pre-rupture groove 31, and the arc-shaped pre-rupture groove 31 is located at the edge of the explosion-proof disc 3. The pre-rupture groove is a weak area pre-designed on the explosion-proof disc 3. When the pressure reaches the set threshold, these areas will preferentially deform and rupture. In Example 1 of the present invention, an arc-shaped pre-rupture groove 31 is provided on the edge of the explosion-proof disc 3, so that the explosion-proof disc 3 can accurately start to rupture from the pre-rupture groove on the edge when it is under pressure. Compared with the explosion-proof disc 3 without a pre-rupture groove, the starting point of the rupture under pressure is difficult to predict, and this design of Example 1 can ensure that the rupture position is fixed, which helps to ensure that when pressure relief is required, the pressure can be released in an orderly manner from the predetermined position, avoiding uneven pressure release caused by random rupture positions or causing additional impact on other parts of the container. Moreover, the arc-shaped shape design is conducive to the diffusion of pressure along a specific arc direction, making the pressure release smoother.

[0047] Example 2: Reference Figure 6 As shown, the explosion-proof disc 3 is provided with a plurality of cross-shaped pre-rupture grooves 32, and the plurality of cross-shaped pre-rupture grooves 32 are arranged at intervals along the circumference of the explosion-proof disc 3. The plurality of cross-shaped pre-rupture grooves 32 are arranged at intervals along the circumference of the explosion-proof disc 3, so that when the explosion-proof disc 3 is ruptured under pressure, the pressure can be released more evenly from multiple positions. In this way, it is possible to avoid the pressure being concentrated in a certain place, thereby making the rupture process of the entire explosion-proof disc 3 smoother and reducing the impact on the pressure vessel body and surrounding equipment. Moreover, due to the presence of multiple pre-rupture grooves, when the pressure reaches a certain level, multiple parts rupture simultaneously or successively, which speeds up the pressure relief speed.

[0048] Compared with Example 1, during the pressure relief process, the explosion-proof disc 3 of Example 2 can release pressure simultaneously from multiple cross-shaped pre-rupture grooves 32 spaced apart along the circumferential direction. This multi-channel pressure relief method can effectively disperse the pressure, so that the explosion-proof disc 3 will not be pushed out by the high-pressure medium as a whole or in large part during the pressure relief. In Example 1, the explosion-proof disc 3 only begins to rupture from the arc-shaped pre-rupture groove 31 at the edge, and the pressure release is relatively concentrated, which makes it easier to cause the explosion-proof disc 3 to be pushed out over a larger area. Once the explosion-proof disc 3 is pushed out as a whole or in large part, it is very likely to hit the indicator device 4 above, causing the indicator device 4 to fly out or break, posing a serious safety hazard. Example 2 significantly reduces such risks through the design of multi-position dispersed pressure relief, and is safer.

[0049] In addition, refer to Figure 3 and Figure 4As shown, the indicator light switch 42 is a micro switch 421, and the micro switch 421 includes a driving rod 422 and a switch body 423. One end of the driving rod 422 is connected to the switch body 423, and the other end of the driving rod 422 is suspended. The driving rod 422 is located above the explosion-proof disc 3. When the explosion-proof disc 3 protrudes outward, the driving rod 422 can move under the drive of the explosion-proof disc 3. It should be noted that the micro switch 421 used is a common product on the market. In this way, when the explosion-proof disc 3 protrudes outward, it will first contact the driving rod 422, and continue to move outward against the driving rod 422, and a contact is set on the switch body 423 of the micro switch 421, and the contact is usually in a normally open (or normally closed) state. During the process of the explosion-proof plate 3 protruding outward, the driving rod 422 will gradually approach the contact; when the container body 1 is filled, the explosion-proof plate 3 completely protrudes outward and causes the driving rod 422 to press against the contact, and the state of the contact changes (normally open to closed, or normally closed to open), thereby changing the circuit state and realizing the control of the display or on and off of the indicator light 41.

[0050] It is worth mentioning that the micro switch 421 has the characteristics of sensitive action and fast response speed, so when the explosion-proof plate 3 bulges outward due to the pressure change in the container, it can quickly push the driving rod 422 to move. Once the driving rod 422 presses on the contact on the switch body 423, the circuit state can be changed in time and accurately, and the display or on and off of the indicator light 41 can be accurately controlled. This precise control can provide accurate signals for operators, so that they can clearly understand the filling status of the pressure vessel, avoid operational errors caused by misjudgment, and improve the safety and reliability of the entire filling process. Ordinary mechanical switches may require a large displacement or a strong external force to change the state, and it is difficult to accurately capture the subtle changes of the explosion-proof plate 3, and the safety and reliability are poor.

[0051] Further, see Figure 4 As shown, the driving rod 422 is a roller lever type driving rod 424, which includes a lever 4241 and a roller 4242. One end of the lever 4241 is fixedly connected to the switch body 423, and the roller 4242 is rotatably mounted on the other end of the lever 4241. When the explosion-proof disc 3 bulges outward, the roller 4242 contacts the explosion-proof disc 3. The roller 4242 in the roller lever type driving rod 424 can convert the original sliding friction between the driving rod 422 and the explosion-proof disc 3 into rolling friction, which greatly reduces the friction between the two, avoids the surface wear of the explosion-proof disc 3, and ensures the stable performance of the explosion-proof disc 3; at the same time, the design of the roller 4242 makes the contact between the explosion-proof disc 3 and the driving rod 422 smoother, which can ensure that the explosion-proof disc 3 can easily push the driving rod 422 when it bulges outward, avoids jamming, and ensures the smoothness, stability and response accuracy of the entire system.

[0052] Moreover, compared with the common driving rod 422, the roller 4242 can better maintain good contact with the explosion-proof plate 3 at different angles and positions, ensuring that when the explosion-proof plate 3 is raised, the driving rod 422 can be effectively pushed to trigger the micro switch 421 to operate.

[0053] In addition, refer to Figure 1 and Figure 3 As shown, the container body 1 is provided with a mounting portion 11, and the explosion-proof disc 3 is fixedly connected to the mounting portion 11. In this way, the explosion-proof disc 3 can be firmly mounted on the container body 1 to accurately reflect the change of the pressure of the container body 1.

[0054] In addition, refer to Figure 3 As shown, the indicator light 41 includes a lampshade 411, a light emitter 412, a controller 413 and a power supply 414, the micro switch 421, the light emitter 412 and the power supply 414 are all electrically connected to the controller 413, the micro switch 421, the light emitter 412, the controller 413 and the power supply 414 are all installed in the lampshade 411, and the lampshade 411 is fixedly installed on the mounting portion 11. In this way, the indicator light 41 can be integrated into the explosion-proof disk 3, so as to more quickly and accurately sense the action changes of the explosion-proof disk 3. Moreover, after such integration, the overall volume can be effectively reduced, and the structure is more compact.

[0055] Among them, refer to Figure 3 As shown, a through hole 415 is provided on the lampshade 411. When the explosion-proof disc 3 ruptures and releases pressure, the medium in the container will generate a large impact force. After the through hole 415 is provided on the lampshade 411, the medium can overflow from the through hole 415, effectively dispersing the impact force. This avoids the concentrated impact of the medium on the indicator light 41 and other components in the lampshade 411, prevents the indicator light 41 and other components from flying out or bouncing due to the impact force, and improves safety.

[0056] In addition, a card slot is provided in the lampshade 411, and the controller 413 is fixedly installed in the card slot. In this way, the controller 413 can be firmly fixed in the lampshade 411 to avoid loosening caused by the explosion-proof plate 3, the micro switch 421 or the overall vibration of the container body 1. If the controller 413 is loose, it may cause the indicating device 4 to malfunction, making it impossible for the operator to accurately obtain the filling status information of the container, thereby causing safety problems such as repeated filling and overpressure. Therefore, the design of fixing the controller 413 by the card slot can effectively ensure the stable operation of the indicating device 4 and improve the safety and reliability of the entire anti-refilling system.

[0057] In addition, refer to Figure 4 As shown, a buffer pad 5 is fixedly mounted on one side of the explosion-proof disc 3 facing the micro switch 421. The buffer pad 5 can absorb part of the impact force when the explosion-proof disc 3 bulges outward and contacts the driving rod 422, reducing the direct impact on the micro switch 421, thereby protecting the micro switch 421 from damage.

[0058] In summary, such a pressure vessel capable of displaying the filling status utilizes the characteristics of the explosion-proof disc 3 itself to enable the pressure vessel to have pressure relief and warning functions, and cooperates with the pre-rupture groove, micro switch 421 and other structures to avoid repeated filling of the container and ensure safety.

[0059] The embodiments of the present invention are described in detail above with reference to the accompanying drawings, but the present invention is not limited to the described embodiments. For those skilled in the art, various changes, modifications, substitutions and variations of these embodiments are made without departing from the principles and spirit of the present invention, and still fall within the scope of protection of the present invention.

Claims

1. A pressure vessel capable of displaying the filling status, comprising a container body and a valve, wherein the valve is installed on the top of the container body, characterized in that: It also includes an explosion-proof piece, which is fixedly mounted on the upper end of the container body. An indicating device is fixedly mounted on the explosion-proof piece, and the indicating device includes an indicator light and an indicator light switch. The indicator light switch is electrically connected to the indicator light, and the indicator light switch is located above the explosion-proof piece. When the container body has not been filled with a medium, the explosion-proof piece is recessed into the container body. When the container body is gradually filled with a medium, the explosion-proof piece will bulge outward and contact the indicator light switch.

2. The pressure container capable of displaying filling status according to claim 1, characterized in that: The explosion-proof plate is provided with an arc-shaped pre-rupture groove, and the arc-shaped pre-rupture groove is located at the edge of the explosion-proof plate.

3. The pressure container capable of displaying filling status according to claim 1, characterized in that: The explosion-proof plate is provided with a plurality of cross-shaped pre-rupture grooves, and the plurality of cross-shaped pre-rupture grooves are arranged at intervals along the circumference of the explosion-proof plate.

4. The pressure container capable of displaying filling status according to claim 2 or 3, characterized in that: The indicator light switch is a micro switch, which includes a driving rod and a switch body. One end of the driving rod is connected to the switch body, and the other end of the driving rod is suspended. The driving rod is located above the explosion-proof plate. When the explosion-proof plate protrudes outward, the driving rod can move under the drive of the explosion-proof plate.

5. The pressure container capable of displaying filling status according to claim 4, characterized in that: The driving rod is a roller lever type driving rod, which includes a lever and a roller. One end of the lever is fixedly connected to the switch body, and the roller is rotatably mounted on the other end of the lever. When the explosion-proof plate protrudes outward, the roller contacts the explosion-proof plate.

6. The pressure container capable of displaying filling status according to claim 5, characterized in that: The container body is provided with a mounting portion, and the explosion-proof sheet is fixedly connected to the mounting portion.

7. The pressure container capable of displaying filling status according to claim 6, characterized in that: The indicator light includes a lampshade, a light-emitting body, a controller and a power supply. The micro switch, the light-emitting body and the power supply are all electrically connected to the controller. The micro switch, the light-emitting body, the controller and the power supply are all installed in the lampshade. The lampshade is fixedly installed on the mounting part.

8. The pressure container capable of displaying filling status according to claim 7, characterized in that: The lampshade is provided with a through hole.

9. The pressure container capable of displaying filling status according to claim 8, characterized in that: A card slot is arranged in the lampshade, and the controller is fixedly installed in the card slot.

10. The pressure container capable of displaying filling status according to claim 4, characterized in that: A buffer pad is fixedly mounted on one side of the explosion-proof disk facing the micro switch.

Images