A quick flow guiding pressure relief device and a flow guiding pressure relief method

Abstract

The application discloses a kind of quick flow guide pressure relief device and flow guide pressure relief method, belong to switch cabinet technical field. Including pressure relief passage, guide plate, hook plate and elastic piece. When the part where guide plate is located in pressure relief passage is impacted by pressure gas, the guide plate impacted by pressure gas will flow to exhaust port while applying opposite force to hook plate, and after hook plate is displaced by force, the positioning pin shaft on the guide plate not impacted will fall off from the groove of hook plate and cover above the part not impacted by pressure gas. Through the flow guide pressure relief device and method provided by the application, on the one hand, it can reduce the intensity and time of the heat gas pressure borne by the switch cabinet, avoid the secondary damage caused by the switch cabinet bearing long-time, high-intensity heat gas pressure; on the other hand, it can reduce the impact of heat gas on the pressure relief passage, avoid the damage of pressure relief passage due to excessive stress, prevent pressure gas from rushing out, and protect the safety of external personnel and property.

Description

Technical Field

[0001] This invention relates to a rapid pressure relief device and method, belonging to the field of switchgear technology. Background Technology

[0002] Switchgear, as an indispensable part of electrical equipment, mainly functions to open, close, control, and protect electrical equipment in a power system. However, during the operation of switchgear, various unexpected reasons, such as short circuits, may lead to arcing, which can cause serious safety accidents and even endanger personal safety and the stable operation of electrical equipment.

[0003] To prevent this from happening, designing a pressure relief device on the top of the switchgear is of great importance. This device, installed on the top of the switchgear, can quickly and effectively decompose and release the pressure from arc expansion, ensuring the safety of personnel near the equipment.

[0004] In practical applications, the pressure relief device on the top of the switchgear typically includes the following components: a pressure relief valve, an arc absorber, an exhaust (pressure relief) pipe, and a control system. When an arc occurs inside the switchgear, the arc energy generates a large amount of hot gas and pressure. The arc absorber can quickly absorb and decompose this hot gas, thus preventing dangers caused by excessive pressure. The exhaust pipe discharges the released gas to the outside of the switchgear, preventing gas from harming equipment and personnel. The control system monitors parameters such as internal pressure and temperature of the switchgear and promptly triggers the operation of the pressure relief valve and the arc absorber, ensuring rapid response and stable operation of the device.

[0005] The existing pressure relief device on the top of the switch cabinet cannot quickly relieve gas pressure through its exhaust channel. The hot gas pressure exerts a strong impact on the exhaust (pressure relief) channel, which can easily cause damage due to excessive stress on the pressure relief channel. This can cause pressurized gas to rush out of the exhaust channel, resulting in external damage to personnel, objects, etc. Summary of the Invention

[0006] To address the aforementioned technical problems, the present invention aims to provide a device and method for rapidly diverting and relieving the pressure of a large amount of hot gas generated by arcing inside a switchgear. This serves two purposes: first, it reduces the intensity and duration of the hot gas pressure inside the switchgear, preventing secondary damage caused by prolonged and high-intensity hot gas pressure; second, it reduces the impact of hot gas on the pressure relief channel, preventing damage due to excessive stress, preventing pressurized gas from escaping, and protecting the safety of external personnel and property.

[0007] The technical problem to be solved by this invention is achieved by the following technical solution:

[0008] A rapid pressure relief device for diverting and relieving pressure on gas inside a switchgear, comprising:

[0009] The pressure relief channel includes a channel body and an exhaust port. The channel body has an opening at the bottom that allows pressurized gas to enter. The channel body is fixed with pins on the front and rear sides. The exhaust port is connected to the end of the channel body.

[0010] The pressure relief channel is provided with at least two guide plates. The angle between the plane of the guide plate and the horizontal direction is directed towards the exhaust port. The angle between the plane of the guide plate and the horizontal direction can be adjusted according to the actual situation to meet the flow requirements under different pressure conditions. The lower end of each guide plate is hinged to the lower opening of the channel body, and the upper end is movably set and the end is fixed with a positioning pin.

[0011] A hook plate is set in the pressure relief channel and located above the guide plate. Limiting grooves are provided on the front and rear sides of the hook plate. The shaft pin is inserted into the limiting grooves. The bottom of the hook plate has grooves equal in number to those of the guide plate.

[0012] The elastic element is connected at one end to the pressure relief channel and at the other end to the hook plate. The elastic element provides kinetic energy for the hook plate to reset after displacement.

[0013] As a preferred example, a sealing plate is hinged to the top of the exhaust port to close the exhaust port, and a regulating valve is also provided at the exhaust port to adjust the exhaust flow rate according to the actual usage.

[0014] As a preferred example, the guide plate body is a flat plate with folded edges around its perimeter and the bending direction of the folded edges is upward.

[0015] As a preferred embodiment, a hinge is installed at the bottom of the guide plate, and a fixing plate is provided at each channel opening of the channel body. The bottom of the guide plate is hinged to the fixing plate through the hinge. A hole is opened on each of the two adjacent folds at the end of the guide plate where the hinge is installed. The holes are located at the upper end of the guide plate, and a positioning pin is installed between the two holes.

[0016] As a preferred example, the groove on the hook plate forms a hook body with the hook plate body, and the outer side of the hook body is an arc-shaped surface.

[0017] As a preferred example, the elastic element is a tension spring, a tension spring fixing member is installed on the side of the channel body near the exhaust port, a round hole is provided on the side of the hook plate near the exhaust port, one end of the tension spring is connected to the tension spring fixing member, and the other end is connected to the round hole on the hook plate.

[0018] As a preferred example, the pressure relief channel is also equipped with a pressure sensor and a temperature sensor to monitor pressure and temperature changes in real time and issue an alarm when necessary.

[0019] A pressure relief method using the above-mentioned rapid pressure relief device includes the following steps:

[0020] When each guide plate in the pressure relief channel is not impacted by pressurized gas, the upper ends of all the guide plates are engaged with the corresponding grooves on the hook plate by positioning pins.

[0021] When one or more sections of the pressure relief channel are impacted by pressurized gas, the guide plate impacted by the pressurized gas guides the pressurized gas to the exhaust port while applying a force opposite to the flow of the pressurized gas to the hook plate. After the hook plate is subjected to the force and is displaced, the positioning pins on the remaining guide plates that are not impacted fall out of the grooves of the hook plate and cover the parts that are not impacted by the pressurized gas.

[0022] The beneficial effects of this invention are:

[0023] This invention provides a rapid guiding pressure relief device and method, which can quickly guide and relieve the pressure of a large amount of hot gas generated by arcing inside the switchgear. On the one hand, it can reduce the intensity and duration of hot gas pressure inside the switchgear, avoiding secondary damage caused by prolonged and high-intensity hot gas pressure. On the other hand, it can reduce the impact of hot gas on the pressure relief channel, preventing the pressure relief channel from being damaged due to excessive force, preventing pressurized gas from rushing out, and protecting the safety of external personnel and property. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the conventional state structure of the pressure relief device when no pressure is generated in the pressure relief channel in this invention;

[0025] Figure 2 This is a schematic diagram of the pressure relief device in the present invention when pressure is generated in the pressure relief channel;

[0026] Figure 3 This is a schematic diagram of the guide plate in this invention;

[0027] Figure 4 This is a schematic diagram of the hook plate in this invention.

[0028] In the picture:

[0029] 1. Pressure relief channel; 101. Left end channel; 102. Middle channel; 103. Right end channel; 104. Exhaust port; 105. Fixing plate; 106. Shaft pin;

[0030] 2. Guide plate; 201. Hinge; 202. Positioning pin;

[0031] 3. Hook plate; 301. Groove; 302. Hook body; 303. Limiting groove; 304. Round hole;

[0032] 4. Tension spring;

[0033] 5. Tension spring fixing parts;

[0034] 6. Pressure generation area; 601. Pressure generation point one; 602. Pressure generation point two; 603. Pressure generation point three. Detailed Implementation

[0035] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0036] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are used solely for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined with "first" or "second" may explicitly or implicitly include one or more of the stated features. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0037] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection, an electrical connection, or a connection that allows for communication; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0038] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature being directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0039] The following disclosure provides many different embodiments or examples for implementing different structures of the invention. To simplify the disclosure, specific examples of components and arrangements are described below. Of course, these are merely examples and are not intended to limit the invention. Furthermore, reference numerals and / or letters may be repeated in different examples; such repetition is for simplification and clarity and does not in itself indicate a relationship between the various embodiments and / or arrangements discussed.

[0040] refer to Figure 1 The present invention provides a rapid guiding pressure relief device, which can be used to guide and relieve the pressure of gas generated after arcing inside the switch cabinet. The device of the present invention consists of a pressure relief channel 1, a guide plate 2, a hook plate 3, an elastic element, and an elastic element fixing element.

[0041] The pressure relief channel 1 includes a channel body and an exhaust port 104. An opening allowing pressurized gas to enter is provided at the bottom of the channel body. Piston pins 106 are fixed to the front and rear sides of the channel body. The exhaust port 104 is connected to the end of the channel body. The left channel 101, the middle channel 102, and the right channel 103 are sequentially connected to form the channel body. The channel is a cuboid, with the front and rear ends sealed by welding with end plates. Before welding, a hole is made in each of the front and rear end plates, and a pin 106 is pressed and riveted for positioning the hook plate 3. The other sides of the channel are open, each with a bolt connection hole. One bolt is placed above each pressure-generating location and connected to the pressure-generating area 6 with bolts. One end of the pressure relief channel 1 (shown as the left end) is connected to the left channel 101 with a end plate and bolts, serving a sealing function. The other end of the pressure relief channel 1, i.e., the right channel 103 (shown as the right end), has the exhaust port 104 installed.

[0042] Guide plates 2, at least two guide plates 2 are provided in the pressure relief channel 1, such as Figure 1As shown, in this embodiment, there are three guide plates 2. The angle between the plane where the guide plate 2 is located and the horizontal direction is towards the exhaust port 104. The angle between the plane where the guide plate 2 is located and the horizontal direction can be adjusted according to the actual situation to adapt to the flow requirements under different pressure conditions. The lower end of each guide plate 2 is hinged to the lower opening of the channel body, and the upper end is movably set and the end is fixed with a positioning pin 202.

[0043] Specifically, such as Figure 3 As shown, the guide plate 2 is a flat plate with folded edges around its perimeter, and the bending direction of the folded edges is upward.

[0044] A hinge 201 is installed at the bottom of the guide plate 2. A fixing plate 105 is welded and fixed at the bottom opening of each channel of the channel body. The bottom of the guide plate 2 is hinged to the fixing plate 105 through the hinge 201. A hole is opened on each of the two adjacent folds at the end of the guide plate 2 where the hinge 201 is installed. The holes are located at the top of the guide plate 2. A positioning pin 202 is installed between the two holes.

[0045] The hook plate 3 is disposed within the pressure relief channel 1 and located above the guide plate 2. Limiting grooves 303 are provided on both the front and rear sides of the hook plate 3, and the shaft pin 106 is inserted into the limiting grooves 303. The bottom of the hook plate 3 has grooves 301 in the same number as those on the guide plate 2. Specifically, as shown... Figure 4 As shown, the hook plate 3 is a rectangular flat plate with three grooves 301 and three limiting grooves 303. The number of limiting grooves 303 can be set according to the actual number of channels. It also has a round hole 304. The three grooves 301 are used to hook the positioning pins 202 on the guide plate 2. Under the action of the elastic element, the guide plate 2 is thus positioned as shown. Figure 1 The location shown.

[0046] The elastic element is connected at one end to the pressure relief channel 1 and at the other end to the hook plate 3. The elastic element provides kinetic energy for the hook plate 3 to return to its original position after displacement. Specifically, the elastic element is a tension spring 4. A tension spring fixing component 5 is installed on the side of the channel body near the exhaust port 104. A round hole 304 is provided on the side of the hook plate 3 near the exhaust port 104, serving as a connection hole. One end of the tension spring 4 is connected to the tension spring fixing component 5, and the other end is connected to the round hole 304 on the hook plate 3. The tension spring fixing component 5 is L-shaped, with two holes on one side for fixing to bolts on the channel, and one hole on the other side for hanging the tension spring 4.

[0047] A sealing plate is hinged to the top of the exhaust port 104. The sealing plate is used to close the exhaust port 104. As another embodiment of the present invention, a regulating valve is also provided at the exhaust port 104. The regulating valve is used to adjust the exhaust flow rate according to the actual use.

[0048] In another embodiment of the present invention, a hook body 302 is formed between the groove 301 opened on the hook plate 3 and the hook plate 3 body. The overall structure of the groove 301 is roughly a right trapezoid, and the hypotenuse of the right trapezoid is set on the right side of the groove 301, which facilitates the positioning pin 202 of the guide plate 2 to disengage from the hook body 302. The hook body 302 is set on the left side, and the outer side (right side) of the hook body 302 is an arc-shaped surface. The arc-shaped surface structure makes it easier for the positioning pin 202 to disengage from the hook body 302 and reduces obstruction.

[0049] As another embodiment of the present invention, a pressure sensor and a temperature sensor are also provided in the pressure relief channel 1 to monitor pressure and temperature changes in real time and issue an alarm when necessary.

[0050] A pressure relief method using the above-mentioned rapid pressure relief device includes the following steps:

[0051] When each guide plate 2 in the pressure relief channel 1 is not impacted by pressurized gas, the upper ends of all guide plates 2 are engaged with the corresponding grooves 301 on the hook plate 3 by the positioning pins 202.

[0052] When one or more sections of the pressure relief channel 1 are impacted by pressurized gas, the guide plate 2 impacted by the pressurized gas guides the pressurized gas to the exhaust port 104 and applies a force opposite to the flow of the pressurized gas to the hook plate 3. After the hook plate 3 is subjected to the force and is displaced, the positioning pins 202 on the remaining unimpacted guide plates 2 fall out of the grooves 301 of the hook plate 3 and cover the parts that have not been impacted by the pressurized gas.

[0053] Combination Figure 2 The above methods are explained in detail, when... Figure 2As shown in the diagram, the arrow represents pressurized gas. When pressure is generated at the pressure generation point 602, the pressurized gas rushes upward onto the upper guide plate 2. After being subjected to force, the guide plate 2 rotates concentrically along the hinge 201. At this time, since the positioning pin 202 on the guide plate 2 is located in the groove 301 of the hook plate 3, the positioning pin 202 on the guide plate 2 will drive the hook plate 3 to move. Since the hook plate 3 is positioned by the riveting pin 106 on the front and rear sealing plates of the pressure relief channel 1 through the limiting groove 303, the hook plate 3 can only move within the range of the limiting groove 303 along the direction limited by the riveting pin 106 on the sealing plate. At this point, two changes occur. First, the pressurized gas is redirected by the reaction force of the guide plate 2, allowing it to flow smoothly along the pressure relief channel 1 to the exhaust port 104. This reduces the impact on the pressure relief channel 1 and prevents damage caused by excessive stress, which could lead to external damage (personnel, objects, etc.) from the pressurized gas rushing out. Second, the guide plates 2 above the other pressure-free areas are dislodged from the grooves 301 of the hook plate 3 after the guide plates 2 above the pressure-free areas are subjected to force and move. They then cover the pressure-free areas (pressure-generating areas 1 601 and 3 603), preventing pressurized gas from entering these areas and causing the accident to escalate.

[0054] By using the guide plate 2 to artificially change the direction of the pressurized gas, the pressurized gas runs more quickly along the pressure relief channel 1 in a preset direction and is finally discharged from the exhaust port 104. This can quickly reduce the pressure in the pressure-generating part, protect the equipment from damage caused by prolonged pressure after pressure is generated, effectively improve the equipment protection performance, and provide reliable protection for the personal safety of people around the equipment.

[0055] In the description of this specification, the references to "certain embodiments," "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples" indicate that a specific feature, structure, material, or characteristic described in connection with the described embodiment or example is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0056] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the stated features. In the description of this invention, "a plurality of" means at least two, such as two or three, unless otherwise explicitly specified.

[0057] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention, which is defined by the claims and their equivalents.

Claims

1. A rapid pressure relief device for diverting and relieving pressure on gas inside a switchgear, characterized in that, include: The pressure relief channel (1) includes a channel body and an exhaust port (104). An opening is provided at the bottom of the channel body to allow pressurized gas to enter. Shaft pins (106) are fixed on the front and rear sides of the channel body. The exhaust port (104) is connected to the end of the channel body. Guide plate (2), at least two guide plates (2) are provided in the pressure relief channel (1). The angle between the plane of the guide plate (2) and the horizontal direction is open towards the exhaust port (104). The lower end of each guide plate (2) is hinged to the lower opening of the channel body, and the upper end is movably set and the end is fixed with a positioning pin (202). The hook plate (3) is set in the pressure relief channel (1) and located above the guide plate (2). The hook plate (3) has a limit groove (303) on both the front and rear sides. The shaft pin (106) is inserted into the limit groove (303). The bottom of the hook plate (3) has a groove (301) equal in number to that of the guide plate (2). The elastic element is connected at one end to the pressure relief channel (1) and at the other end to the hook plate (3). The elastic element provides kinetic energy for the hook plate (3) to reset after displacement.

2. The rapid flow diversion and pressure relief device according to claim 1, characterized in that, The top of the exhaust port (104) is hinged with a sealing plate.

3. The rapid flow diversion and pressure relief device according to claim 1, characterized in that, The guide plate (2) is a flat plate with folded edges around its perimeter and the bending direction of the folded edges is upward.

4. The rapid flow diversion and pressure relief device according to claim 3, characterized in that, The bottom end of the guide plate (2) is fitted with a hinge (201). Each channel opening of the channel body is fitted with a fixing plate (105). The bottom end of the guide plate (2) is hinged to the fixing plate (105) via the hinge (201). A hole is opened on each of the two adjacent folds at the end of the guide plate (2) where the hinge (201) is installed. The hole is located at the top end of the guide plate (2). A positioning pin (202) is installed between the two holes.

5. The rapid flow diversion and pressure relief device according to claim 1, characterized in that, The groove (301) opened on the hook plate (3) forms a hook body (302) between the hook plate (3) body and the hook plate (3) body, and the outer side of the hook body (302) is an arc-shaped surface.

6. The rapid flow diversion and pressure relief device according to claim 1, characterized in that, The elastic element is a tension spring (4). A tension spring fixing member (5) is installed on the side of the channel body near the exhaust port (104). A round hole (304) is provided on the side of the hook plate (3) near the exhaust port (104). One end of the tension spring (4) is connected to the tension spring fixing member (5), and the other end is connected to the round hole (304) on the hook plate (3).

7. A method for depressurizing using the rapid depressurization device according to any one of claims 1-6, characterized in that, include: When each guide plate (2) in the pressure relief channel (1) is not impacted by pressurized gas, the upper ends of all the guide plates (2) are engaged with the corresponding grooves (301) on the hook plate (3) by the positioning pin (202); When one or more of the pressure relief channels (1) are impacted by pressurized gas, the guide plate (2) impacted by the pressurized gas guides the pressurized gas to the exhaust port (104) and at the same time applies a force opposite to the flow of the pressurized gas to the hook plate (3). After the hook plate (3) is subjected to the force and is displaced, the positioning pins (202) on the remaining unimpacted guide plates (2) fall out of the grooves (301) of the hook plate (3) and cover the parts that are not impacted by the pressurized gas.

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