Safety valve

Abstract

The application discloses a safety valve for preventing medium pressure from exceeding a predetermined value, which comprises a safety door plate and a weight connected with each other, the weight can switch positions according to the size of the medium pressure to control the opening and closing of the safety door plate, wherein: when the medium pressure is less than the predetermined value, the weight is in a closed position and can apply an external force to the safety door plate to keep the safety door plate in a closed state; and when the medium pressure is greater than the predetermined value, the weight can move to a release position to cancel the external force applied to the safety door plate, so that the safety door plate can restore the default open state. The safety valve disclosed by the application can adjust the position of the weight according to the change of the medium pressure, and then automatically and quickly realize the opening or closing of the safety door plate.

Description

Technical Field

[0001] This application relates to the field of medium pressure regulation, and more specifically, to a safety valve. Background Technology

[0002] When the pressure of the medium in a pipeline or equipment rises above a safe value, the safety valve can protect the entire system by discharging the medium outside the pipeline or equipment to prevent the medium pressure from exceeding the specified value.

[0003] Spring-loaded safety valves are commonly used to protect equipment and systems from damage caused by pressure exceeding permissible limits. They utilize the force of a compressed spring to balance the force acting on the valve disc. However, a drawback is that the applied load changes as the valve opens; as the valve disc rises, the spring compression increases, and the force acting on the disc also increases. This is detrimental to the rapid opening of the safety valve, failing to meet the requirement for timely depressurization of the cabin and potentially creating safety hazards.

[0004] A rupture disc explosion-proof door consists of a rupture disc and a clamping device. When an explosion occurs in the combustion chamber, the resulting pressure causes the rupture disc to break, thus relieving pressure. Rupture discs have good sealing performance, rapid response, high sensitivity, and large pressure relief capacity, and can adapt to different environments. However, their disadvantage is that they cannot return to their original state after pressure relief and cannot be reused. Summary of the Invention

[0005] To address the aforementioned technical problems of existing spring safety valves and rupture diaphragm explosion-proof doors, this application discloses a safety valve capable of simultaneously meeting the requirements of rapid pressure relief and automatic reset. This safety valve is used to prevent the medium pressure from exceeding a predetermined value (e.g., it can be used for internal pressure regulation of a sealed chamber). The safety valve includes a safety door plate and a counterweight connected to each other. The counterweight is characterized in that it can switch positions according to the magnitude of the medium pressure to control the opening and closing of the safety door plate, wherein:

[0006] When the medium pressure is less than the predetermined value, the counterweight is in the closed position and can apply external force to the safety door panel to keep the safety door panel in the closed state; and,

[0007] When the medium pressure exceeds the predetermined value, the counterweight can move to the release position to cancel the external force it applies to the safety door panel, allowing the safety door panel to return to its default open state. The default state refers to the state of a mechanism when it is not subjected to external force; under external force, the mechanism will leave this default state.

[0008] Preferably, the counterweight is positioned on a track at a predetermined angle. Based on on-site surveying, theoretical calculations, and protractor measurements, the angle is preferably 14°. The counterweight is connected to the safety gate panel via a rope to apply the external force to the safety gate panel.

[0009] When the medium pressure is less than the predetermined value, the counterweight remains at a low position A on the track under its own weight. This low position A is relatively far from the safety gate panel, allowing the rope to be tensioned.

[0010] When the medium pressure is greater than the predetermined value, the counterweight can overcome its own weight under the action of the medium pressure and move to the high position B of the track. The high position B is located relatively close to the safety gate, so that the rope can be relaxed.

[0011] Preferably, the track has a convex arc segment and a straight segment, wherein: the convex arc segment is located on the lower position A side and smoothly connects to the straight segment extending to the higher position B side; and the weight needs to pass through the convex arc segment during its movement from the lower position A to the higher position B. After the weight passes through the convex arc segment and enters the straight segment, the thrust required to hold the weight on the track of the straight segment is less than the thrust required to pass through the track of the convex arc segment. Therefore, the safety door does not close immediately after opening, but when the medium pressure gradually decreases to a certain set value, the weight returns to the initial lower position A along the track under the action of gravity, simultaneously driving the safety door to close, and the entire safety valve completes the depressurization process.

[0012] Preferably, the weight has a dumbbell shape, the dumbbell shape including two discs symmetrically located on both sides and a connecting rod connecting the two discs; and the track has two parallel L-shaped guide rails to cooperate with the two discs respectively.

[0013] Preferably, the safety valve has a housing with an inlet and an outlet, wherein: the safety door is rotatably disposed at the outlet; the track is fixedly disposed within the housing; and the inlet is connected to the environment in which the medium is located, and an air duct is formed between the inlet and the track to transmit the pressure of the medium to the counterweight.

[0014] Preferably, the container has multiple corresponding inlets and outlets, and correspondingly multiple safety doors, tracks and counterweights, to meet the requirement of simultaneously discharging a large amount of media; wherein: the multiple inlets and outlets are spaced apart in a horizontal or vertical direction, and the multiple safety doors, tracks and counterweights also have a corresponding layout.

[0015] Preferably, the housing is made of stainless steel to improve its resistance to deformation and corrosion, and extend its service life.

[0016] The safety valve disclosed in this application can adjust the position of the counterweight according to changes in medium pressure, thereby automatically and quickly opening or closing the safety gate. Other features and advantages of this application will be described in detail in the following detailed description section. Attached Figure Description

[0017] The accompanying drawings, which form part of this application, are used to provide a further understanding of this application, and the illustrative embodiments and descriptions thereof are used to explain this application. In the drawings:

[0018] Figure 1 This is a schematic diagram of a safety valve disclosed in a specific embodiment of this application. The diagram shows the situation where the safety gate is in a closed state or an open state when the counterweight is in both the low position A and the high position B. The diagram also shows the positional relationship between the counterweight in the low position A and the convex arc segment.

[0019] Figure 2 A schematic diagram of a dumbbell-shaped weight disclosed in one specific embodiment of this application;

[0020] Figure 3 A front view of the track disclosed in one specific embodiment of this application;

[0021] Figure 4 A schematic diagram of the connection method between the rope and the safety door panel as disclosed in a specific embodiment of this application;

[0022] Figure 5 This is a schematic diagram of a safety valve with an upper and lower two-spaced entrance and exit, and a plurality of safety door panels, tracks and counterweights also having corresponding layouts, as disclosed in a specific embodiment of this application.

[0023] Figure label:

[0024] Detailed Implementation

[0025] The technical solution of this application will now be described in detail with reference to the accompanying drawings and embodiments.

[0026] This application discloses a safety valve capable of simultaneously satisfying the requirements of rapid pressure relief and automatic reset. The safety valve is used to prevent the medium pressure from exceeding a predetermined value (e.g., for internal pressure regulation of a sealed chamber). The safety valve includes a safety gate and a counterweight connected to each other. The counterweight is characterized by its ability to switch positions according to the magnitude of the medium pressure to control the opening and closing of the safety gate. Specifically: when the medium pressure is less than the predetermined value, the counterweight is in a closed position and can apply an external force to the safety gate to keep it closed; and when the medium pressure is greater than the predetermined value, the counterweight can move to a release position to cancel the external force applied to the safety gate, allowing the safety gate to return to its default open state. The default state refers to the state of a mechanism when it is not subjected to external force; under the action of external force, the mechanism will leave this default state.

[0027] The weight can achieve the aforementioned position switching movement through various transmission mechanisms, such as spring mechanisms or lever mechanisms. Preferably, such as... Figure 1 As shown, the counterweight is positioned on a track at a predetermined angle (preferably 14°, determined by on-site surveying, theoretical calculations, and protractor measurement). The counterweight is connected to a safety gate via a rope to apply the external force to the safety gate. When the medium pressure is less than the predetermined value, the counterweight remains at a low position A on the track under its own weight, with position A relatively far from the safety gate, allowing the rope to be tensioned. When the medium pressure is greater than the predetermined value, the counterweight overcomes its own weight under the medium pressure and moves to a high position B on the track, with position B relatively close to the safety gate, allowing the rope to be relaxed.

[0028] Preferably, such as Figure 1 As shown, the track has a convex arc section and a straight section. The convex arc section is located on the lower position A side of the track, and the weight needs to pass through this convex arc section during its movement from the lower position A to the higher position B. After the weight passes through the convex arc section and enters the straight section, the thrust required to keep the weight on the straight section track is less than the thrust required to pass through the convex arc section track. Therefore, the safety gate does not close immediately after opening. Instead, when the medium pressure gradually decreases to a certain set value, the weight returns to the initial lower position A along the track under the action of gravity, simultaneously driving the safety gate to close, thus completing the entire pressure relief process of the safety valve.

[0029] The counterweight can have various shapes suitable for position switching, for example, it can have a pulley, preferably, such as... Figure 2As shown, the weight has a dumbbell shape, which includes two discs symmetrically located on both sides and a connecting rod connecting the two discs; and the track has two parallel L-shaped guide rails to cooperate with the two discs respectively.

[0030] Preferably, the safety valve has a housing with an inlet and an outlet, wherein: the safety door is rotatably disposed at the outlet; the track is fixedly disposed within the housing; and the inlet is connected to the environment in which the medium is located, and an air duct is formed between the inlet and the track to transmit the pressure of the medium to the counterweight.

[0031] Preferably, such as Figure 5 As shown, the container has multiple corresponding inlets and outlets, and correspondingly multiple safety doors, tracks and counterweights to meet the requirement of simultaneously discharging a large amount of media; wherein: the multiple inlets and outlets are spaced apart in the horizontal or vertical direction, and the multiple safety doors, tracks and counterweights also have a corresponding layout.

[0032] Preferably, the housing is made of stainless steel to improve its resistance to deformation and corrosion, and extend its service life.

[0033] The technical solution of this application will be further described in detail below with reference to the embodiments and accompanying drawings.

[0034] The safety valve provided by this invention features automatic reset and rapid response. The safety valve includes: a counterweight, a track, a C-shaped plate, a rope, a lifting lug, a spring, a safety door plate, a track support, a support bracket, and a housing. The entire device is housed within a housing. The counterweight is connected to the lifting lug on the safety door plate via a rope (e.g., ...). Figure 4 As shown, the device reciprocates along a track; the track is located below the counterweight and is supported and fixed by a track bracket welded to a C-shaped plate; the safety door is hinged and fixed to the outside of the housing; the track bracket is fixed to the housing using angle brackets and M10 bolts. A small opening is made on the left side of the device to connect to a blower pipe, and the change in airflow simulates the pressure change caused by the pressure difference change inside the housing under vacuum conditions.

[0035] It includes a dumbbell-shaped weight, a track, a track support, a rope, a safety door panel, and a spring. The weight and the safety door panel are connected by the rope and a lifting lug. When a predetermined pressure value is reached within the sealing device, it pushes the weight on the slide rail upward, reducing the tension transmitted to the safety door panel through the rope. At this time, the safety door panel opens under inertia, realizing the opening and pressure relief of the door panel. After the pressure value drops to a certain level, the thrust on the weight on the track decreases, and the weight moves downward under the action of gravity, realizing the closing of the door panel. The advantage of this invention is rapid pressure relief and fast response.

[0036] When the blower is not running, the pressure inside the box is the same as the pressure outside. The counterweight is pulled by the rope and supported by the track. Under its own weight, it remains stationary. At this time, the door panel is pulled to the lower left by the counterweight and remains closed.

[0037] When the blower operates, the increasing airflow simulates the pressure increase within the chamber. When the airflow reaches a critical value, the counterweight, under the force of the rightward airflow, overcomes gravity and slides onto the track. The traction force on the door panel decreases, and under the influence of gravity, the valve opens, releasing pressure. At this point, the door panel is connected to the track by a wire spring, maintaining a semi-closed state. When the blower is turned off, simulating the state after pressure release, the rightward thrust on the counterweight decreases, becoming insufficient to overcome gravity. Under the influence of gravity, the counterweight slides downward along the track, and the valve closes as the counterweight moves, returning the device to its initial position.

[0038] This method uses the wind force changes of the blower inside the device to simulate the depressurization process when the cabin is connected to the device, and uses a simple device to initially verify the feasibility of the invention.

[0039] Preferably, the housing has multiple corresponding inlets and outlets, and correspondingly multiple safety doors, tracks, and counterweights to meet the requirement of simultaneously discharging large amounts of media; wherein: the multiple inlets and outlets are spaced apart in a horizontal or vertical direction, and the multiple safety doors, tracks, and counterweights also have a corresponding layout. Specifically: the self-resetting fast-response safety valve provided by the present invention includes a counterweight, track, C-shaped plate, rope, lifting lug, spring, safety door, track support, support bracket, and housing; the entire device is divided into upper and lower layers, and the double-valve structure can meet the depressurization requirements of a large volume chamber. The left side opening, according to installation requirements, serves as the inlet for connecting the device to the chamber for air pressure, and the right side is the specific device for the residual pressure valve. The counterweight is connected to the lifting lug on the safety door through the rope, and achieves reciprocating motion on the track; the track is located below the counterweight and is supported and fixed by welding the track support to the C-shaped plate; the safety door is hinged and fixed to the outside of the housing; the track support is fixed to the housing by connecting the track support with brackets and M10 bolts.

[0040] When the pressure transmitted from the chamber to the device increases to a certain critical value, the weight, pushed to the right, overcomes gravity and is forced onto the track. At this point, the valve opens, and the device begins to depressurize. After the weight passes the front curved track, the thrust required to keep it on the track is less than the thrust required at the initial point. Therefore, the valve does not close immediately after opening. Instead, as the air pressure gradually decreases to a certain set value, the weight, under the influence of gravity, returns to its initial state along the track, simultaneously closing the valve, thus completing the depressurization of the entire device.

[0041] The self-resetting fast-response safety valve has an attractive design and complete functions. It can quickly depressurize the device and is easy to install and operate, making it a very practical new invention for engineering technicians.

[0042] In the description of this application, it should be noted that: the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the technical feature is used. These terms are used only for the convenience of describing this application and for simplifying the description, and do not indicate or imply that the technical feature must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application. The terms "first," "second," and "third," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance. The terms "horizontal," "vertical," and "suspended," etc., do not indicate that the component must be absolutely horizontal or suspended, but can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," not that the structure must be completely horizontal, but can be slightly tilted; the terms "approximately" and "basically" indicate that a certain feature or range is similar to or close to the predetermined requirements to some extent, but does not need to be completely identical. It implies a certain degree of flexibility and room for change, allowing for some modifications without affecting its core concept or function; in addition, unless otherwise explicitly specified and limited, the terms "set up," "install," "connect," and "link" should be interpreted broadly. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. For those skilled in the art, the specific meaning of the above terms in this application can be understood in conjunction with the specific circumstances.

[0043] The preferred embodiments of this application have been described in detail above. However, this application is not limited to the specific details of the above embodiments. Within the scope of the technical concept of this application, various simple modifications can be made to the technical solution of this application, and these simple modifications all fall within the protection scope of this application.

[0044] It should also be noted that the various specific technical features described in the above embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, this application will not describe the various possible combinations separately.

[0045] Furthermore, various different implementations of this application can be combined in any way, as long as they do not violate the spirit of this application, they should also be regarded as the content disclosed in this application.

Claims

1. A safety valve for preventing medium pressure from exceeding a predetermined value, the safety valve comprising a safety gate and a counterweight connected to each other, characterized in that: The counterweight can switch positions according to the magnitude of the medium pressure to control the opening and closing of the safety door, wherein: When the medium pressure is less than the predetermined value, the counterweight is in the closed position and can apply external force to the safety door panel to keep the safety door panel in the closed state; and, When the medium pressure is greater than the predetermined value, the counterweight can move to the release position to cancel the external force it applies to the safety door panel, so that the safety door panel can return to the default open state; The counterweight is positioned on a track at a predetermined angle, and is connected to the safety gate via a rope, wherein: When the medium pressure is less than the predetermined value, the counterweight remains at a low position A on the track under its own weight. This low position A is relatively far from the safety gate panel, allowing the rope to be tensioned. When the medium pressure is greater than the predetermined value, the counterweight can overcome its own weight under the action of the medium pressure and move to the high position B of the track. The high position B is in a position relatively close to the safety door panel so that the rope can be relaxed. The track has a convex arc segment and a straight segment, wherein: the convex arc segment is located on the lower position A side and smoothly connects to the straight segment extending to the higher position B side; and the weight needs to pass through the convex arc segment during its movement from the lower position A to the higher position B.

2. The safety valve according to claim 1, characterized in that: The weight has a dumbbell shape, which includes two discs symmetrically located on both sides and a connecting rod connecting the two discs; and the track has two parallel L-shaped guide rails to cooperate with the two discs respectively.

3. The safety valve according to claim 1, characterized in that: The safety valve has a housing with an inlet and an outlet, wherein: the safety door is rotatably disposed at the outlet; the track is fixedly disposed within the housing; and the inlet is connected to the environment in which the medium is located, and an air duct is formed between the inlet and the track to transmit the pressure of the medium to the counterweight.

4. The safety valve according to claim 3, characterized in that: The enclosure has multiple corresponding entrances and exits, and correspondingly multiple safety doors, tracks, and counterweights; wherein: the multiple entrances and exits are spaced apart in a horizontal or vertical direction, and the multiple safety doors, tracks, and counterweights also have a corresponding layout.

5. The safety valve according to claim 3, characterized in that: The enclosure is made of stainless steel.

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