A full-bore explosion pressure relief vent

Abstract

The invention discloses a full-bore explosion pressure relief vent, comprising: a cabinet, a first valve, a second valve, a connecting rod, a latch, a first spring and a second spring. The full-bore explosion pressure relief vent of the invention is changed from a single valve to a plurality of valves, so that each valve of the explosion pressure relief vent becomes compact and light, and is more flexible to open; the opening is changed from up and down translation opening to rotation opening, and the opening can reach 90° after opening, and the maximum flow cross section reaches the full-bore cross section of the explosion pressure relief vent, so that the pressure relief is smoother; the first valve and the second valve are installed on the cabinet through hinges or rotating shafts, so that the connection between the valve and the cabinet is more secure; the latch and the connecting rod are interlocked and limited, and any valve cannot be opened separately outside the cabinet, and can only be opened simultaneously inside the cabinet under the action of air pressure, so that the invasion of external forces such as animals or wind and rain can be prevented, and once the internal overpressure is exceeded, it can be quickly opened to complete the pressure relief, thereby improving the reliability of the explosion pressure relief vent and ensuring safety.

Description

Technical Field

[0001] The invention relates to the field of explosion pressure relief, in particular to a full-diameter explosion pressure relief port. Background Art

[0002] Article 6.6.4.2 of the national standard GB50028 "Urban Gas Design Code" stipulates: The pressure regulating cabinet should have an explosion relief vent, which should be no less than 50% of the upper cover or the maximum cabinet wall area, and the pressure regulating cabinet should have a vent. According to national standards, gas pressure regulating cabinets exceeding a certain volume must be equipped with explosion relief vents and natural vents. The existing explosion relief vent is a movable door that is opened vertically and horizontally on the upper cover of the pressure regulating cabinet. The movable door is equipped with 2 to 4 spring-preloaded pull rods connected to the cabinet body. When the pressure in the cabinet exceeds the standard, under the action of air pressure, the movable door overcomes its own weight and the preload force of the spring, and moves horizontally to a certain height, so that the air pressure leaks out along the gaps on the four sides of the movable door.

[0003] This type of explosion pressure relief vent has defects: the movable door itself is heavy, the pressure relief path is not smooth, it is easy to get stuck, and the connection with the cabinet is not firm. To meet the pressure relief vent area required by the specification, the weight of a single movable door is heavy, and coupled with the preload of the spring, a higher pressure is required to push the movable door horizontally open. The movable door as a pressure relief vent is connected to the cabinet through 2 to 4 movable pull rods. Due to the limited travel of the pull rods, the opening of the gaps on the four sides when the movable door is lifted is limited, so the actual opening area of ​​the pressure relief vent often does not meet the area required by the specification. In addition, due to the large distance between the pull rods, it is difficult to ensure that the pull rods move in the same direction, so it is easy for one or more corners to get stuck, resulting in the movable door being unable to open and the pressure being unable to be released smoothly. The movable door as a pressure relief vent is only connected to the cabinet through a movable pull rod, and is not firmly connected to the cabinet, so the movable door is easily separated from the cabinet, and is often blown off by the wind or shaken off during transportation. Summary of the invention

[0004] The main technical problem solved by the present invention is to provide a full-diameter explosion pressure relief vent with the advantages of light structure, large flow cross-section, flexible opening, stable installation, high safety and reliability. When it is promoted and used in gas pressure regulating cabinets or other enclosed cabins, it can significantly improve the reliability and safety of gas pressure regulating cabinets and enclosed cabins.

[0005] In order to solve the above technical problems, a technical solution adopted by the present invention is:

[0006] Provided is a full-diameter explosion pressure relief vent, comprising: a cabinet, a first valve, a second valve, a connecting rod, a latch, a first spring, and a second spring.

[0007] The first valve and the second valve are rotatably connected to the cabinet body. The first valve and the second valve are opened in two different rotation directions. The bottom of the first valve is provided with the latch. The bottom end of the latch is provided with an oblique stopper. The latch is provided with a first spring connected to the cabinet body to provide a pre-tightening force for closing the first valve, so that the first valve is reset and closed after opening.

[0008] The bottom of the second valve is movably connected to the connecting rod, one end of the connecting rod is provided with a slot, the top of the slot is provided with a folded edge, and the connecting rod is connected to the cabinet through a second spring to provide a pre-tightening force for closing the second valve, so that the second valve is reset and closed after opening.

[0009] The slot on the connecting rod is movably connected to the oblique stopper on the latch, and the oblique stopper cooperates with the slot and the folded edge to be interlocked and fastened. When the first valve rotates, the latch is driven to move up and down, and when the second valve rotates, the connecting rod is driven to move left and right, thereby releasing or locking the interlocking of the latch and the slot, and realizing the synchronous opening and closing of the first valve and the second valve.

[0010] In a preferred embodiment of the present invention, the number of the first valve and the number of the second valve are both greater than or equal to one.

[0011] In a preferred embodiment of the present invention, the oblique stopper is a wedge-shaped structure.

[0012] In a preferred embodiment of the present invention, each of the plurality of first valves is connected with a latch.

[0013] In a preferred embodiment of the present invention, a latch is installed on one or more of the plurality of first valves, and all the first valves are connected by a linkage rod so that the first valves rotate synchronously in linkage.

[0014] In a preferred embodiment of the present invention, the bottom of the second valve is rotatably connected to the connecting rod.

[0015] In a preferred embodiment of the present invention, a plurality of second valves are simultaneously connected to a connecting rod, and the connecting rod drives all the second valves to rotate synchronously.

[0016] In a preferred embodiment of the present invention, the first valve and the second valve open outwardly toward the outside of the cabinet.

[0017] In a preferred embodiment of the present invention, the specific implementation steps of the full-bore explosion pressure relief vent include:

[0018] (1) When the first valve and the second valve are both closed, the connecting rod and the latch are both in a stationary state, and the oblique stopper of the latch and the card slot are in an interlocking limit locking state;

[0019] (2) When only the first valve is open and the second valve is closed, the connecting rod is in a stationary state, the first valve drives the bolt to rise, but the inclined block of the bolt is stuck by the folded edge of the slot, and the inclined block and the slot are still in an interlocking limit fastening state, so that the bolt cannot continue to move upward, and the first valve cannot be opened alone;

[0020] (3) When only the second valve is open and the first valve is closed, the latch is in a stationary state, and the second valve drives the connecting rod to move horizontally, but the slot on the connecting rod is blocked by the oblique block, so that the connecting rod cannot continue to move to the left, and the second valve cannot be opened alone;

[0021] (4) When the first valve and the second valve are opened at the same time, the first valve rotates out of the cabinet body with the hinge or shaft fixed on the cabinet body as a fulcrum, so that the first valve overcomes the preload force of the first spring and opens and lifts the latch; while the first valve is opened, the second valve rotates out of the cabinet body with the hinge or shaft fixed on the cabinet body as a fulcrum to drive the connecting rod connected to it to move to the left, and the inclined block on the latch avoids the folded edge on the slot, so that the folded edge on the slot and the latch are unlocked and disengaged, and the first valve and the second valve continue to rotate to open 90°.

[0022] The beneficial effects of the present invention are as follows: it is composed of a plurality of valves, so that each valve of the explosion pressure relief vent becomes compact and light, and is more convenient to open; the opening is changed from up and down translation opening to rotation opening, and the opening can reach 90° after opening, and the maximum flow cross section reaches the full diameter cross section of the explosion pressure relief vent, so that the pressure relief is smoother; the hinge or the rotating shaft is used as a rotation support, most of the weight of the valve is borne by the cabinet, and only a small amount of the valve weight needs to be overcome, so the opening is more flexible; the hinge or the rotating shaft is used to install and fix the valve to the cabinet, and the latch and the connecting rod are interlocked and fastened, so that the connection between the valve and the cabinet is also more firm, thereby improving the reliability of the explosion pressure relief vent and ensuring safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative work, among which:

[0024] Figure 1 It is a structural schematic diagram of a specific embodiment of a full-diameter explosion pressure relief vent of the present invention in a closed state;

[0025] Figure 2 It is a structural schematic diagram of a specific embodiment of a full-diameter explosion pressure relief vent of the present invention in an open state;

[0026] Figure 3It is a partially enlarged schematic diagram of a state in which the latch and the connecting rod are interlocked and fastened in a specific embodiment of a full-bore explosion pressure relief vent of the present invention;

[0027] Figure 4 It is a partially enlarged schematic diagram of the unlocked and released state of the latch and the connecting rod in a specific embodiment of a full-diameter explosion pressure relief vent of the present invention;

[0028] Figure 5 It is a schematic isometric diagram of a specific embodiment 1 of a full-diameter explosion pressure relief vent of the present invention;

[0029] Figure 6 It is a simplified axonometric diagram of a second specific embodiment of a full-diameter explosion pressure relief vent of the present invention. DETAILED DESCRIPTION

[0030] The technical solutions in the embodiments of the present invention are described clearly and completely below. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0031] See also Figure 1-6 , the embodiment of the present invention includes:

[0032] A full-bore explosion pressure relief vent can be used in a gas pressure regulating cabinet or other closed compartments, and its structure includes: a cabinet body 1, a first valve 2, a second valve 3, a connecting rod 4, a latch 5, a first spring 6, and a second spring 11.

[0033] The first valve (left valve) 2 and the second valve (right valve) 3 are mounted on the cabinet 1 through hinges or rotating shafts, and the number of the first valve and the second valve is greater than or equal to 1. The first valve and the second valve open in two different rotation directions. In this embodiment, the first valve opens to the left, and the second valve opens to the right.

[0034] The latch 5 is provided at the bottom of the first valve near the connection with the cabinet, and the end of the latch is connected to the inclined stopper 9 of the wedge-shaped structure. The latch is connected to the cabinet through the first spring 6 to provide a pre-tightening force for closing the first valve, so that the valve is reset and closed after opening.

[0035] Among them, each of the plurality of first movable doors may be connected with a latch pin to respectively cooperate with the connecting rod slot 10. Alternatively, only one latch pin is installed on one first movable door, and all the first movable doors are connected together by another linkage rod to achieve linkage synchronous rotation, and the effect of interlocking and limiting is the same.

[0036] One end of the connecting rod is connected to the cabinet through a second spring 11 to provide a pre-tightening force for closing the second valve, so that the valve is reset and closed after opening. The connecting rod is provided with one or more slots 10 movably connected to the oblique stopper, and the top of the slot is provided with a folded edge 8 that cooperates with the oblique stopper for interlocking and buckling. After the first valve is closed, the latch and the folded edge on the slot are interlocked and buckled. After the latch and the slot folded edge are interlocked and buckled, any valve (the first valve and the second valve) cannot be opened alone. Only when the interlocking limit is released can the first valve and the second valve be opened synchronously.

[0037] The bottom of the second valve can be rotatably connected to the connecting rod through a connecting structure such as a rotating shaft / hinge / slide slot to drive the connecting rod to move left and right in the cabinet to release or lock the interlocking of the pin and the slot, thereby realizing the opening and closing of the first valve and the second valve.

[0038] Wherein, a plurality of second valves are simultaneously connected to the same connecting rod, and the connecting rod drives all the second valves to rotate synchronously in linkage.

[0039] like Figure 1 and Figure 2 As shown, the first valve 2 rotates out of the cabinet body with the hinge or shaft fixed on the cabinet body as a fulcrum, driving the bolt connected to it to move upward. When it is rotated to 90°, the bolt is lifted to the uppermost end, and the spring connected to the bolt is compressed; the second valve 3 rotates out of the cabinet body with the hinge or shaft fixed on the cabinet body as a fulcrum, driving the connecting rod connected to it to move to the left. When it is rotated to 90°, the connecting rod moves to the leftmost end, and the spring connected to the connecting rod is stretched. When the valve of the explosion pressure relief vent is opened 90°, the direction of the valve is consistent with the channel direction of the explosion pressure relief vent, that is, the cross-section of the pressure relief passage is equivalent to the full-diameter cross-section of the explosion pressure relief vent. Since most of the weight of the valve is borne on the hinge or shaft, when the valve is opened, it only needs to overcome the preload force of the spring and a small amount of gravity of the valve, so the valve can be opened more easily. When the external force disappears, the spring recovers and the valve closes.

[0040] In addition, in order to allow the valve of the explosion relief vent to open smoothly when the pressure exceeds the standard in the cabinet or the closed cabin, but not to be easily opened from the outside due to external forces such as wind, rain or animals, the valve interlocking limit mechanism is used to control the opening and closing of the valve, that is, when the left valve 2 and the right valve 3 are closed, the folded edge 8 of the slot on the connecting rod 4 and the latch 5 are in an interlocking limit fastening state, and the left valve 2 and the right valve 3 cannot be opened separately; only when the left valve 2 and the right valve 3 are opened together, driving the connecting rod 4 and the latch 5 to move at the same time, can the connecting rod 4 and the latch 5 be disconnected and separated, and the left valve 2 and the right valve 3 can be fully opened. The specific contents include:

[0041] (i) When the left valve 2 and the right valve 3 are opened at the same time: the left valve 2 overcomes the preload of the spring 6 to open and lift the latch 5. At the same time, the right valve 3 opens, driving the connecting rod 4 to move horizontally to the left, so that the folded edge 8 on the slot is disengaged from the latch 5, and the left valve 2 and the right valve 3 continue to rotate and open to 90°.

[0042] like Figure 4 As shown, at this time, the connecting rod 4 moves horizontally to the left, and the inclined stopper 9 on the latch pin 5 avoids the folded edge 8 located on the left part of the slot on the connecting rod 4. The latch pin 5 can be smoothly lifted, and the slot 10 of the connecting rod 4 can also continue to move to the left over the bottom of the inclined stopper, that is, the latch pin 5 and the connecting rod 4 are unlocked and disengaged.

[0043] (ii) When only the left valve 2 is open and the right valve 3 is closed, the left valve 2 drives the latch 5 to rise, but the oblique stopper of the latch 5 is caught by the groove and the folded edge 8 on the connecting rod 4, so that the latch 5 cannot continue to move upward, so the left valve 2 cannot be opened. Figure 3 As shown, at this time, the connecting rod 4 connected to the right valve 3 is in a stationary state, and the oblique stopper of the latch 5 is located below the left folded edge 8 of the slot on the connecting rod 4, so that the latch 5 cannot be lifted, that is, the left valve 2 cannot be opened.

[0044] (III) When only the right valve 3 is open and the left valve 2 is closed, the right valve 3 drives the connecting rod 4 to move horizontally, but the slot on the connecting rod 4 is blocked by the oblique block of the latch 5, so that the connecting rod 4 cannot continue to move to the left, and the right valve 3 cannot be opened. Figure 3 As shown, at this time, the latch 5 connected to the left valve 2 is in a stationary state, and the lower end of the oblique stopper of the latch 5 is inserted into the slot of the connecting rod 4. The connecting rod 4 cannot move to the left, that is, the right valve 3 cannot be opened.

[0045] The above three situations realize the interlocking limit of the left valve 2 and the right valve 3. Specific embodiment 1

[0047] like Figure 5 As shown, a full-bore explosion relief vent includes two valves, namely a left valve 2 and a right valve 3. The two valves rotate in different directions to open. The valve shown in the figure is in a nearly fully open state, and the latch and the connecting rod have been unlocked and disengaged. When the two valves are reset to the closed position, as long as one of the two valves does not move, the other cannot be opened, which can prevent the intrusion of external forces such as wind, rain or animals from a certain direction. However, if the pressure in the box or closed cabin exceeds the standard, the air pressure will act on the two valves at the same time. If it exceeds the spring preload and a small amount of gravity, the valves will all open and the pressure will be released smoothly. Specific embodiment 2

[0049] like Figure 6As shown, a full-bore explosion pressure relief vent includes two left valves 2 and two right valves 3. The left valve that rotates to the left to open includes two doors, namely door 2A and door 2B, and the right valve that opens to the right includes two doors, namely door 3A and door 3B. The valves shown in the figure are in a state close to being fully open, and the latches and connecting rods have been unlocked and released. The two left valves are each connected to an independent latch, and the two doors of the right valve are connected and linked by a connecting rod. When all the valves are reset to the closed position, as long as any of the four doors does not move, the connecting rod and the latch cannot be unlocked and released, that is, the valve cannot be opened by opening any door from the outside of the box, which can prevent the intrusion of external forces such as wind, rain or animals from a certain direction. However, if the pressure in the box or the closed cabin exceeds the standard, the air pressure will act on all the doors at the same time, and the valves will all open when the spring preload and a small amount of gravity exceed the pressure, and the pressure will be released smoothly.

[0050] The beneficial effects of the full-diameter explosion pressure relief vent of the present invention are:

[0051] (1) Changing from one valve to multiple valves makes the structure of each valve of the explosion pressure relief vent smaller and lighter, and easier to open;

[0052] (ii) The original single valve moves horizontally up and down when opened, and after opening, the pressure can only be released from the seams on all sides. The present invention changes the opening from vertical translation to rotation. After opening, the opening can reach 90 degrees, and the maximum flow cross section reaches the full diameter cross section of the explosion pressure relief port, making the pressure relief smoother;

[0053] (iii) Due to the support of hinges or rotating shafts, most of the weight of the valve is borne by the cabinet body. When the valve is opened, only a small amount of the weight of the valve needs to be overcome, making it more flexible to open;

[0054] (iv) Because of the hinges or pivots, the interlocking of the latch and the connecting rod, the connection between the valve and the cabinet is more secure, which improves the reliability of the explosion relief vent and ensures safety.

[0055] The above descriptions are merely embodiments of the present invention and are not intended to limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the present invention specification, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A full-bore explosion pressure relief vent, characterized in that: include: Cabinet, first valve, second valve, connecting rod, latch, first spring, second spring, The first valve and the second valve are rotatably connected to the cabinet body. The first valve and the second valve are opened in two different rotation directions. The bottom of the first valve is provided with the latch. The bottom end of the latch is provided with an oblique stopper. The latch is provided with a first spring connected to the cabinet body to provide a pre-tightening force for closing the first valve, so that the first valve is reset and closed after opening. The bottom of the second valve is movably connected to the connecting rod, a slot is provided on the connecting rod, a folded edge is provided on the top of the slot, and the connecting rod is connected to the cabinet through a second spring to provide a pre-tightening force for closing the second valve, so that the second valve is reset and closed after opening. The slot on the connecting rod is movably connected to the oblique stopper on the latch, and the oblique stopper cooperates with the slot and the folded edge to be interlocked and fastened. When the first valve rotates, the latch is driven to move up and down, and when the second valve rotates, the connecting rod is driven to move left and right, thereby releasing or locking the interlocking of the latch and the slot, and realizing the synchronous opening and closing of the first valve and the second valve.

2. A full-bore explosion vent according to claim 1, characterized in that: The number of the first valve and the number of the second valve are both greater than or equal to one.

3. A full-bore explosion vent according to claim 1, characterized in that: The oblique stopper is a wedge-shaped structure.

4. A full-bore explosion vent according to claim 1, characterized in that: Each of the plurality of first valves is connected with a latch.

5. A full-bore explosion vent according to claim 1, characterized in that: A latch is installed on one or more of the first plurality of valves, and all the first valves are connected via a linkage rod so that the first valves rotate synchronously in linkage.

6. A full-bore explosion vent according to claim 1, characterized in that: The bottom of the second valve is rotatably connected to the connecting rod.

7. A full-bore explosion vent according to claim 1, characterized in that: The first valve and the second valve are opened to the outside of the cabinet.

8. The full-bore explosion vent according to claim 1, characterized in that: The specific implementation steps of the full-bore explosion pressure relief vent include: (1) When the first valve and the second valve are both closed, the connecting rod and the latch are both in a stationary state, and the oblique stopper of the latch and the card slot are in an interlocking limit locking state; (2) When only the first valve is open and the second valve is closed, the connecting rod is in a stationary state, the first valve drives the bolt to rise, but the inclined block of the bolt is stuck by the folded edge of the slot, and the inclined block and the slot are still in an interlocking limit fastening state, so that the bolt cannot continue to move upward, and the first valve cannot be opened alone; (3) When only the second valve is open and the first valve is closed, when the latch is in a stationary state, the second valve drives the connecting rod to move horizontally, but the slot on the connecting rod is blocked by the oblique block, so that the connecting rod cannot continue to move to the left, and the second valve cannot be opened alone; (4) When the first valve and the second valve are opened at the same time, the first valve rotates out of the cabinet body with the hinge or shaft fixed on the cabinet body as a fulcrum, so that the first valve overcomes the preload force of the first spring and opens and lifts the latch; while the first valve is opened, the second valve rotates out of the cabinet body with the hinge or shaft fixed on the cabinet body as a fulcrum to drive the connecting rod connected to it to move to the left, and the inclined block on the latch avoids the folded edge on the slot, so that the folded edge on the slot and the latch are unlocked and disengaged, and the first valve and the second valve continue to rotate to open 90°.

Images