Modular swing combined pressure relief valve

Abstract

A modular swing combined pressure relief valve. The pressure relief valve comprises: a valve seat, a valve housing, and at least one pair of swing modular actuating valve body units. The valve housing is arranged on the valve seat, and encloses together with the valve seat to form a valve cavity; each swing modular actuating valve body unit is arranged in the valve cavity; two swing modular actuating valve body units in each pair of swing modular actuating valve body units are arranged opposite to each other; and each pair of swing modular actuating valve body units is sequentially arranged in a straight line on the valve seat.

Description

Modular suspended combination pressure relief valve

[0001] This disclosure claims priority to Chinese patent application No. 202411824275.7, filed on December 12, 2024, the entire contents of which are incorporated herein by reference. Technical Field

[0002] This disclosure relates to the field of transformer technology, and in particular to a modular suspended combined pressure relief valve. Background Technology

[0003] When a high-voltage transformer experiences an arc fault, it produces an arc discharge phenomenon. This arc discharge causes the insulating oil to crack, instantly forming a large amount of high-pressure oil gas. The transformer tank is a closed space, and the rapid gas generation process creates a pressure shock wave. Summary of the Invention

[0004] This disclosure presents a modular, suspended combination pressure relief valve.

[0005] A modular suspended combined pressure relief valve is proposed, comprising: a valve seat, a valve body, and at least one pair of suspended modular actuation valve body units. The valve body is disposed on the valve seat and forms a valve cavity with the valve seat. Each of the at least one pair of suspended modular actuation valve body units is placed within the valve cavity, with the two suspended modular actuation valve body units in each pair arranged opposite to each other. Furthermore, each pair of suspended modular actuation valve body units is arranged sequentially in a straight line along the length of the valve seat. Each pair of suspended modular actuation valve body units is configured to open under the action of oil and gas in the oil chamber to release oil and gas.

[0006] In some embodiments, each suspended modular actuation valve body unit includes: a base, a diaphragm, an elastic pressurizing mechanism, and an actuation alarm mechanism. The base is disposed on the valve seat and has a valve port. A support frame is also provided on the base, positioned between the valve port and a valve housing side plate adjacent to the base. The diaphragm is rotatably connected to the base, and its rotation axis is located between the valve port and the valve housing side plate adjacent to the base, allowing the two diaphragms of each pair of suspended modular actuation valve body units to open relative to each other. The two ends of the elastic pressurizing mechanism are rotatably connected to the diaphragm and the support frame, respectively, and are configured to apply elastic pressure to the diaphragm, enabling the diaphragm to seal at the valve port, thereby sealing the oil chamber. The pressure of the oil and gas in the oil chamber acting on the diaphragm creates an opening torque relative to the rotation axis of the diaphragm, while the pressure of the elastic pressurizing mechanism acting on the diaphragm creates a resistance torque relative to the rotation axis of the diaphragm. When the opening torque is greater than the resistance torque, the diaphragm rotates open from the sealed position at the valve port to release the oil and gas. The action alarm mechanism is mounted on the support frame and is triggered when the diaphragm opens, emitting an action signal to provide a fault alarm.

[0007] In some embodiments, the action alarm mechanism includes: a first signal trigger rod, a second signal trigger rod, and a limit switch. One end of the first signal trigger rod abuts against the top wall of the diaphragm disc, and the other end of the first signal trigger rod is rotatably connected to the support frame. The second signal trigger rod is disposed above the first signal trigger rod and is rotatably connected to the support frame. The limit switch is disposed above the second signal trigger rod and is configured such that when the diaphragm disc is opened, the diaphragm disc drives the first signal trigger rod to rotate synchronously forward with the diaphragm disc, and pushes the second signal trigger rod to rotate, thereby triggering the contact of the limit switch, causing the limit switch to issue an action signal.

[0008] In some embodiments, a pushing protrusion is provided at the middle position of the first signal trigger rod, and the pushing protrusion is configured to press against the bottom end of the second signal trigger rod so that when the first signal trigger rod rotates synchronously with the diaphragm disk in the forward direction, the pushing protrusion pushes the second signal trigger rod to rotate.

[0009] In some embodiments, the middle position of the second signal trigger rod is rotatably disposed on the support frame, and the top end of the second signal trigger rod is provided with a variable diameter trigger arc plate. The variable diameter trigger arc plate has a trigger arc portion and a non-trigger arc portion, and a transition arc is provided between the trigger arc portion and the non-trigger arc portion. The distance from the trigger arc portion to the rotation axis of the second signal trigger rod is greater than the distance from the non-trigger arc portion to the rotation axis of the second signal trigger rod, so that the trigger arc portion can rotate to directly below the limit switch to press the contact of the limit switch and realize the triggering of the limit switch.

[0010] In some embodiments, the above-described modular suspended combined pressure relief valve satisfies at least one of the following: the first signal trigger rod is connected to a first reset mechanism, the first reset mechanism being configured to apply a reset force to the first signal trigger rod so that the first signal trigger rod can be reset to a non-trigger position after the diaphragm is reset; and the second signal trigger rod is connected to a second reset mechanism, the second reset mechanism being configured to apply a reset force to the second signal trigger rod so that the second signal trigger rod can be reset to the non-trigger position after the first signal trigger rod is reset.

[0011] In some embodiments, the elastic pressurization mechanism includes: a lower support, a spring telescopic guide post, and a force-applying spring. The lower support is rotatably connected to the diaphragm disc. One end of the spring telescopic guide post is connected to the lower support, and the other end of the spring telescopic guide post is provided with a limiting connecting plate, which is rotatably connected to the support frame. The force-applying spring is sleeved on the outer periphery of the spring telescopic guide post and is positioned between the lower support and the limiting connecting plate. The force-applying spring is configured to elastically compress when the diaphragm disc opens and apply a force to the diaphragm disc so that the diaphragm disc can return to the sealed position.

[0012] In some embodiments, the valve housing is further provided with a limiting buffer mechanism, which is provided one-to-one with the diaphragm disc and is configured to limit the opening position of the diaphragm disc and buffer the diaphragm disc to prevent hard collision between the diaphragm disc and the valve housing.

[0013] In some embodiments, the limiting and buffering mechanism includes an arc-shaped support plate and at least one disc spring. The arc-shaped support plate is fixedly mounted on the valve housing. The at least one disc spring is spaced apart on the arc-shaped support plate and configured to limit and buffer the diaphragm when the diaphragm is opened to the correct position.

[0014] In some embodiments, the valve housing is provided with an oil and gas outlet, and an openable side plate is provided at the oil and gas outlet. The openable side plate is configured to open when oil and gas in the oil chamber are released into the valve housing, so as to discharge the oil and gas in the valve housing.

[0015] In some embodiments, the number of installation pairs of the suspended modular actuated valve body unit is determined based on the voltage level of the transformer on which the modular suspended combined pressure relief valve is installed.

[0016] In some embodiments, when determining the number of installation pairs of the suspended modular actuated valve body units based on the voltage level of the transformer on which the modular suspended combined pressure relief valve is installed: The voltage level ΔV of the transformer on which the modular suspended combined pressure relief valve is installed is obtained. A first preset voltage level reference value V1, a second preset voltage level reference value V2, and a third preset voltage level reference value V3 are set. The number of installation pairs of the suspended modular actuated valve body units is determined according to the relationship between the voltage level of the transformer on which the modular suspended combined pressure relief valve is installed and the first preset voltage level reference value V1, the second preset voltage level reference value V2, and the third preset voltage level reference value V3.

[0017] In some embodiments, determining the number of pairs of the suspended modular actuation valve body units based on the relationship between the voltage level of the transformer on which the modular suspended combined pressure relief valve is installed and the first preset voltage level reference value V1, the second preset voltage level reference value V2, and the third preset voltage level reference value V3 includes: when ΔV < V1, selecting a first preset valve pair P1 as the number of installation pairs of the suspended modular actuation valve body units; when V1 ≤ ΔV < V2, selecting a second preset valve pair P2 as the number of installation pairs of the suspended modular actuation valve body units; when V2 ≤ ΔV < V3, selecting a third preset valve pair P3 as the number of installation pairs of the suspended modular actuation valve body units; and when ΔV ≥ V3, selecting a fourth preset valve pair P4 as the number of installation pairs of the suspended modular actuation valve body units. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in this disclosure, the accompanying drawings used in some embodiments of this disclosure will be briefly described below. Obviously, the drawings described below are merely drawings of some embodiments of this disclosure, and those skilled in the art can obtain other drawings based on these drawings.

[0019] Figure 1 is a structural diagram of a modular suspended combined pressure relief valve according to some embodiments of the present disclosure.

[0020] Figure 2 is a structural diagram of a modular suspended combined pressure relief valve with lateral opening according to some embodiments of the present disclosure.

[0021] Figure 3 is a structural diagram of the internal structure of a modular suspended combined pressure relief valve according to some embodiments of the present disclosure.

[0022] Figure 4 is a structural diagram of the opening of the suspended modular actuation valve body unit in a modular suspended combined pressure relief valve according to some embodiments of the present disclosure.

[0023] Figure 5 is a cross-sectional view of the internal structure of a modular suspended combined pressure relief valve according to some embodiments of the present disclosure.

[0024] Figure 6 is a structural diagram of the sealing state of a suspended modular actuation valve body unit according to some embodiments of the present disclosure.

[0025] Figure 7 is a structural diagram of the open state of the suspended modular action valve body unit according to some embodiments of the present disclosure.

[0026] Figure 8 is a front view of a suspended modular actuation valve body unit according to some embodiments of the present disclosure.

[0027] Figure 9 is a cross-sectional view of a suspended modular actuation valve body unit according to some embodiments of the present disclosure.

[0028] Figure 10 is a side view of the location of a portion of the suspended modular actuation valve body unit according to some embodiments of the present disclosure.

[0029] Reference numerals: 1-Valve seat, 11-Mounting hole, 2-Valve body, 21-Oil / gas outlet, 22-Opening side plate, 3-Suspended modular valve body unit, 31-Base, 311-Valve port, 312-Sealing ring, 313-Pressure ring, 32-Diaphragm, 321-Hinge plate, 33-Elastic pressurizing mechanism, 331-Lower support, 332-Spring telescopic guide post, 333-Limit connecting plate, 334-Force spring, 34-Action alarm mechanism, 341-First signal trigger rod, 34 11-Push protrusion, 342-Second signal trigger rod, 3421-Variable diameter trigger arc plate, 34211-Trigger arc, 34212-Non-trigger arc, 34213-Transition arc, 343-Limit switch, 344-First reset mechanism, 3441-Reset support rod, 3442-Rotating handle, 35-Support frame, 36-Connecting rod arm, 361-Slide groove, 362-Limiting plate, 37-Limiting buffer mechanism, 371-Arc-shaped support plate, 372-Disc spring. Detailed Implementation

[0030] To enable those skilled in the art to better understand the technical solutions of the embodiments of this disclosure, the technical solutions of this disclosure will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this disclosure, and not all embodiments. Based on the embodiments of this disclosure, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this disclosure.

[0031] In the description disclosed in this application, unless otherwise stated, the words "first," "second," etc. do not limit the quantity or order of execution, and the words "first," "second," etc., do not necessarily mean that they are different.

[0032] The slash " / " means "or". For example, A / B can mean either A or B. In this article, "and / or" is simply a way of describing the relationship between related objects, indicating that there can be three relationships. For example, A and / or B can mean: only A, only B, and A and B.

[0033] It should be noted that, unless otherwise specified, the embodiments and features described in this disclosure can be combined with each other.

[0034] Transformer oil tanks are enclosed spaces, and the rapid generation of gas creates pressure shock waves. Without a pressure relief device, the overpressure generated by the oil and gas can damage the structure of the transformer tank and cause it to erupt from cracks, potentially leading to an oil and gas explosion, seriously threatening the safety of personnel and equipment. To address this issue, transformer oil tanks are equipped with pressure relief valves. When the pressure rises to the opening pressure, the valve opens rapidly, releasing the high-temperature, high-pressure oil and gas to relieve internal pressure, protect components, and prevent combustion and explosion. After the pressure relief is complete, the valve closes to isolate any remaining oil and gas in the oil chamber, preventing secondary combustion and explosion.

[0035] Currently, the pressure relief valves used in converter transformer tanks are of the linear opening type. In traditional linear opening pressure relief valves, the spring is positioned directly above the diaphragm. When the pressure of oil and gas on the diaphragm exceeds the pressure exerted by the spring, the diaphragm opens rapidly, allowing the valve to rise vertically and release the seal between the diaphragm and the valve seat mounting hole, thus creating a venting channel. Due to its structural characteristics, the response speed decreases as the orifice size increases. When a larger mounting hole is required, multiple pressure relief valves are combined into an array structure to meet the orifice size requirements. When designing large-diameter pressure relief valves, the diaphragm area and thickness must increase accordingly with the increase in nozzle area; otherwise, the structural rigidity of the diaphragm will decrease. This results in the increase in diaphragm mass exceeding the increase in diaphragm area, leading to a pressure increase that is less than the increase in diaphragm mass. As the mounting hole size of the pressure relief valve increases, the response speed decreases, failing to meet the explosion-proof and rapid pressure relief response requirements of transformer tanks.

[0036] Therefore, some embodiments of this disclosure provide a modular, suspended combined pressure relief valve. Some embodiments of this disclosure will now be described in detail with reference to the accompanying drawings and examples.

[0037] This disclosure provides a modular suspended combined pressure relief valve in some embodiments. As shown in Figures 1 to 5, the modular suspended combined pressure relief valve includes: a valve seat 1, a valve body 2, and at least one pair of suspended modular actuated valve body units 3.

[0038] The valve body 2 is mounted on the valve seat 1 and forms a valve cavity with the valve seat 1. Each suspended modular actuation valve body unit 3 is placed inside the valve cavity. The two suspended modular actuation valve body units 3 in each center are arranged opposite each other. Furthermore, each pair of suspended modular actuation valve body units 3 are arranged in a straight line on the valve seat 1 along the length direction of the valve seat 1 (the oblique direction shown in Figure 3). The suspended modular actuation valve body units 3 are configured to open under the action of oil and gas in the oil chamber to release oil and gas.

[0039] In some embodiments, the valve housing 2 can be a housing structure with an open bottom end, and is covered on the valve seat 1, with the two surrounding each other to form a valve cavity. Furthermore, the valve housing 2 and the valve seat 1 can be connected by welding or bolts.

[0040] To facilitate the replacement and maintenance of the internal suspended modular valve body unit 3, in some embodiments, the valve body 2 and the valve seat 1 are detachably connected. For example, the valve body 2 and the valve seat 1 are fixed by bolts, or they can be connected in other ways. This disclosure does not limit this.

[0041] In some embodiments, referring to FIG5, the valve seat 1 is provided with mounting holes 11 arranged in a matrix, that is, at least one column of openings in two rows, which correspond one-to-one with the suspended modular actuation valve body unit 3. The mounting holes 11 are configured to install the suspended modular actuation valve body unit 3, so that the suspended modular actuation valve body unit 3 is installed one-to-one with the mounting holes 11 of the valve seat 1.

[0042] Two suspended modular valve body units 3 are arranged opposite each other so that the two suspended modular valve body units 3 can be opened relative to each other. The opening plates of the two suspended modular valve body units 3, i.e., the diaphragm discs 32, are located on the left and right sides of the two suspended modular valve body units 3 (relative to the position shown in Figure 4). Each pair of suspended modular valve body units 3 are arranged in a straight line on the valve seat 1 along the length direction of the valve seat 1, forming a two-row multi-column structure.

[0043] Of course, when the modular suspended combination pressure relief valve includes a pair of suspended modular actuating valve body units 3, it forms a row structure.

[0044] In some embodiments, the suspended modular actuation valve body unit 3 is detachably mounted on the valve seat 1 so that the suspended modular actuation valve body unit 3 can be replaced and maintained later.

[0045] When a low-resistance fault occurs inside the oil chamber of the transformer, an arc discharge phenomenon will occur, causing the insulating oil to vaporize and crack, instantly forming a large amount of high-temperature and high-pressure oil and gas, which will trigger a pressure shock. Under these circumstances, the suspended module action valve body unit 3 can open so that the oil and gas can be released and sprayed out.

[0046] In some embodiments, three pairs of suspended modular actuation valve body units 3, i.e., six suspended modular actuation valve body units 3, are used as an example for description. Of course, there may also be one, two, or more pairs of suspended modular actuation valve body units 3, and this disclosure does not limit this. For example, the bottom end of the valve seat 1 can be fixedly mounted on the transformer by means of bolts or other connecting parts.

[0047] The pressure relief valves used in current converter transformer tanks are generally circular diaphragm valves. When the pressure reaches a set value, the diaphragm rises and opens, releasing the pressure. When a larger installation orifice is required, the larger the orifice, the slower the response speed. Therefore, pressure relief valves with a diameter exceeding 180mm are rarely used in practice.

[0048] In some embodiments, the valve seat 1 can be a rectangular structure, and the valve shell 2 can be a cuboid structure, with the valve seat 1 and valve shell 2 forming a cuboid valve cavity structure. Compared to other structures such as cylinders, the cuboid structure is easier to assemble, meaning multiple valve seats 1 and valve shells 2 can be assembled to accommodate different mounting hole diameters. Furthermore, the cuboid structure significantly increases the internal space compared to other structures, allowing for a larger arrangement space for the suspended modular valve body unit 3. For example, it can increase the space for the elastic pressure mechanism 33 of the suspended modular valve body unit 3, enabling the elastic pressure mechanism 33 to have sufficient compression and improving the performance of the suspended modular valve body unit 3.

[0049] Some pressure relief valves are integrated structures, meaning multiple small-diameter traditional pressure relief valve actuating units are arranged in the same valve housing. Due to height limitations, the discharged fluids interfere with each other, reducing the actual relief capacity. Furthermore, the main force is borne by the housing, requiring overall testing during inspection. However, the large size of the pressure relief valve makes it impossible to test it on a test bench, such as for sealing and high-temperature tests. Additionally, the large size and multiple functions of the pressure relief valve result in a shorter lifespan. Moreover, the integrated structure of the pressure relief valve requires complete replacement and adjustment during maintenance, significantly increasing maintenance costs.

[0050] The modular suspended combined pressure relief valve provided in some embodiments of this disclosure has a modular structure, that is, each suspended modular actuating valve body unit 3 is a small unit that can be independently tested, maintained and replaced, which facilitates testing and replacement and greatly reduces maintenance costs.

[0051] To facilitate adaptation to different mounting hole diameters, in some embodiments, both the valve body 2 and the valve seat 1 can be assembled structures. Each assembly unit can be adapted to a pair of suspended modular actuation valve body units 3. Through the assembly of multiple assembly units, multiple suspended modular actuation valve body units 3 with different pairs can be assembled.

[0052] In some embodiments, the valve housing 2 is provided with an oil and gas outlet 21, and an openable side plate 22 is provided at the oil and gas outlet 21. The openable side plate 22 is configured to open when the oil and gas in the oil chamber is released into the valve cavity, so as to discharge the oil and gas in the valve cavity.

[0053] In some embodiments, oil and gas outlets 21 can be provided on both ends of the valve body 2, and an openable side plate 22 can be provided at the oil and gas outlet 21. The openable side plate 22 can be automatically opened under the action of oil and gas pressure, so that the oil and gas in the oil chamber can stimulate the pressure impact to open the suspended module action valve body unit 3, enter the valve cavity, and be discharged through the oil and gas outlet 21 to realize the release of oil and gas.

[0054] Of course, the oil and gas outlet 21 and the openable side plate 22 can also be installed on the side plate or the top plate, and this disclosure does not limit this.

[0055] In some embodiments, the oil and gas outlet 21 and the openable side plate 22 are provided on the side end of the valve body 2, which facilitates the assembly of the side end. Only the two ends of the assembly are installed. That is to say, each assembly unit of the valve body 2 has an oil and gas outlet on both ends. It can not only be used as an oil and gas outlet to install the openable side plate 22, but also to assemble multiple assembly units.

[0056] The oil and gas outlet 21 can be a rectangular structure. One side of the openable side plate 22 is rotatably connected to the valve body 2. It can be connected by a hinge. When the suspended module action valve body unit 3 inside the pressure relief valve opens to release, the valve cavity is filled with fluid. Under the action of pressure, the openable side plate 22 rotates and opens relative to the hinge center, completing the release process to the outside.

[0057] In some embodiments, the top side of the openable side plate 22 is rotatably connected to the valve housing 2, so that the openable side plate 22 can automatically close after the oil and gas are discharged.

[0058] As shown in Figures 6 to 9, the suspended-type modular actuation valve body unit 3 includes: a base 31, a diaphragm 32, an elastic pressurization mechanism 33, an actuation alarm mechanism 34, and a support frame 35.

[0059] The base 31 is mounted on the valve seat 1, and the base 31 is provided with a valve port 311. The base 31 is also provided with a support frame 35, which is placed between the valve port 311 and the side plate of the valve housing 2 adjacent to the base 31.

[0060] In some embodiments, the base 31 can be fixedly mounted on the valve seat 1 at the corresponding mounting hole 11 by bolts. For example, the base 31 is provided with a valve port 311, which communicates with the mounting hole 11 on the valve seat 1, so that the communication channel is closed by closing the valve port 311.

[0061] A support frame 35 can be fixedly installed on the base 31. The support frame 35 is located on the opposite side of the opening side of the valve port 311. That is, the support frame 35 is located on one side of the valve port 311 and is arranged close to the side plate of the adjacent valve body 2. As shown in Figure 5, the support frame 35 of the left-side suspended modular actuation valve body unit 3 is located on the left side of the valve port 311 on the left base 31, and the support frame 35 of the right-side suspended modular actuation valve body unit 3 is located on the right side of the valve port 311 on the right base 31. The support frame 35 supports the elastic pressurizing mechanism 33, the actuation alarm mechanism 34, etc., so that the fixed sides of the elastic pressurizing mechanism 33 and the actuation alarm mechanism 34 are supported on both sides of the two suspended modular actuation valve body units 3. Compared with placing them in the middle of the two suspended modular actuation valve body units 3, this would interfere with the flow of oil and gas.

[0062] The diaphragm 32 is rotatably connected to the base 31 and is configured to seal or open the valve port 311. The rotation axis of the diaphragm 32 is located on the same side of the valve port 311 as the support frame 35 (the right side as shown in Figure 9), so that the two diaphragms of each of the two centered suspended module actuation valve body units open relative to each other.

[0063] In some embodiments, the diaphragm 32 is rotatably connected to the base 31 to enable the opening and sealing of the valve port 311.

[0064] To improve the sealing performance at the valve port 311, in some embodiments, a sealing ring 312 is provided at the valve port 311. The sealing ring 312 is arranged around the circumference of the valve port 311 to increase the sealing performance between the two when the diaphragm plate 32 is placed over the valve port 311.

[0065] In some embodiments, a pressure ring 313 is provided on the sealing ring 312. The pressure ring 313 is configured to press the sealing ring 312 to the valve port 311. The pressure ring 313, the sealing ring 312, and the base 31 are connected by bolts or other connecting components. As shown in FIG9, the cross-section of the sealing ring 312 can be a Z-shaped structure to press it to the protrusion of the valve port 311.

[0066] To enable the opening of the diaphragm disc 32, in some embodiments, referring to Figures 7 and 9, the diaphragm disc 32 is connected to the base 31 via a connecting rod arm 36. A hinge plate 321 is provided on the top wall of the diaphragm disc 32. The first end of the connecting rod arm 36 (the right end as shown in Figure 9) is rotatably connected to the support frame 35 via a pin, and the second end of the connecting rod arm 36 (the upper left end as shown in Figure 7) is connected to the hinge plate 321.

[0067] To improve the adaptability of the diaphragm 32 seal, i.e., to ensure a consistent circumferential seal of the diaphragm 32 on the valve port 311, in some embodiments, the second end of the connecting rod arm 36 is rotatably connected to the hinge plate 321. For example, the second end of the connecting rod arm 36 is rotatably connected to the hinge plate 321 via a pin, so that the diaphragm 32 can rotate relative to the connecting rod arm 36. This allows the diaphragm 32 to achieve a flat seal on the valve port 311 through relative rotation in case of inconsistent sealing, thus giving the diaphragm 32 a certain degree of adaptability, ensuring consistent sealing, and improving the sealing effect of the diaphragm 32 on the valve port 311.

[0068] To prevent the diaphragm disk 32 from rotating too much relative to the connecting rod arm 36 and thus failing to return to its original position, in some embodiments, the second end of the connecting rod arm 36 is provided with two limiting plates 362. The two limiting plates 362 are respectively placed on both sides of the second end shaft of the connecting rod arm 36 (the left and right sides as shown in Figure 9), and are configured to limit the diaphragm disk 32 from both sides of the shaft of the connecting rod arm 36 and the diaphragm disk 32, so as to limit the relative rotation angle of the diaphragm disk 32.

[0069] The two ends of the elastic pressurizing mechanism 33 are rotatably connected to the diaphragm 32 and the support frame 35, respectively, and are configured to apply elastic pressure to the diaphragm 32 so that the diaphragm 32 can seal at the valve port 311, thereby sealing the oil chamber. The pressure of the oil and gas in the oil chamber acting on the diaphragm 32 relative to the rotation axis of the diaphragm 32 forms an opening torque, and the pressure of the elastic pressurizing mechanism 33 acting on the diaphragm 32 relative to the rotation axis of the diaphragm 32 forms a resistance torque. When the opening torque is greater than the resistance torque, the diaphragm 32 rotates open from the sealed position at the valve port 311 to release the oil and gas.

[0070] In some embodiments, the first end of the elastic pressing mechanism 33 (the upper right end as shown in FIG. 6) is rotatably connected to the support frame 35, for example, by means of a pin, and the second end of the elastic pressing mechanism 33 (the lower left end as shown in FIG. 6) is rotatably connected to the connecting rod arm 36, also by means of a pin.

[0071] In some embodiments, the valve cavity has a cuboid structure, which optimizes the design space of the elastic pressurizing mechanism 33, thereby selecting appropriate parameters to avoid the elastic pressurizing mechanism 33 from exceeding its allowable value due to excessive compression during the opening process, thus avoiding the failure of the elastic pressurizing mechanism 33.

[0072] Of course, in some embodiments, the second end of the elastic pressing mechanism 33 can also be connected to the connecting rod arm 36 in a rotatable and slidable manner. That is, the connecting rod arm 36 is provided with a groove 361 along its length direction, and the second end of the elastic pressing mechanism 33 is rotatably disposed in the groove 361 by means of a pin. Furthermore, the pin can also slide along the length direction of the groove 361, which allows the elastic pressing mechanism 33 to have a certain amount of movement, thereby preventing the failure of the elastic pressing mechanism 33.

[0073] In some embodiments, there can be two elastic pressure mechanisms 33, support frames 35, and connecting rods 36, which can improve the stability of opening or closing the diaphragm disc 32.

[0074] Referring to Figure 6, the action alarm mechanism 34 is mounted on the support frame 35. It is triggered and sends an action signal when the membrane disc 32 is opened to provide a fault alarm. In some embodiments, the action alarm mechanism 34 may be mounted on the support frame 35, so that when the membrane disc 32 is opened, the membrane disc 32 triggers the action alarm mechanism 34, causing the action alarm mechanism 34 to send an action signal to provide a fault alarm.

[0075] In some embodiments, to prevent the diaphragm 32 from deforming due to a hard collision with the valve housing 2 after it is opened, referring to Figure 7, the valve housing 2 is also provided with a limiting buffer mechanism 37. The limiting buffer mechanism 37 corresponds one-to-one with the diaphragm 32 and is configured to limit the opening position of the diaphragm 32 and buffer the diaphragm 32 to reduce the impact, so as to prevent a hard collision between the diaphragm 32 and the valve housing 2.

[0076] In some embodiments, the limiting buffer mechanism 37 can be disposed between the two support frames 35 to limit the opening position of the diaphragm disk 32. This allows the diaphragm disk 32 to stop rotating after opening to a preset angle under the action of the limiting buffer mechanism 37, thus limiting the opening limit position of the diaphragm disk 32. The limiting buffer mechanism 37 can also buffer the diaphragm disk 32 to prevent it from being deformed by impact. For example, the corresponding opening angle α can be determined according to the actual situation.

[0077] Referring to Figure 9, the elastic pressure mechanism 33 includes: a lower support 331, a spring telescopic guide post 332, a limiting connecting plate 333, and a force-applying spring 334. The lower support 331 is rotatably connected to the diaphragm disc 32. One end of the spring telescopic guide post 332 (the lower left end as shown in Figure 9) is connected to the lower support 331, and the other end of the spring telescopic guide post 332 (the upper right end as shown in Figure 9) is provided with a limiting connecting plate 333, which is rotatably connected to the support frame 35. The force-applying spring 334 is sleeved on the outer periphery of the spring telescopic guide post 332, and is positioned between the lower support 331 and the limiting connecting plate 333. It is configured to elastically compress when the diaphragm disc 32 is opened, and apply a force to the diaphragm disc 32 so that the diaphragm disc 32 can return to the sealed position.

[0078] In some embodiments, the two ends of the spring telescopic guide post 332 are respectively connected to the lower support base 331 and the limiting connecting plate 333, which can be connected by welding or other means. For example, the spring telescopic guide post 332 and the limiting connecting plate 333 are an integral structure. The lower support base 331 is provided with a pin, which is rotatably and slidably disposed in the slide groove 361. The limiting connecting plate 333 is rotatably connected to the support frame 35 through the pin. The force-applying spring 334 is sleeved on the outer periphery of the spring telescopic guide post 332 and is placed between the lower support base 331 and the limiting connecting plate 333. The two ends of the force-applying spring 334 can be respectively connected to the lower support base 331 and the limiting connecting plate 333. The spring telescopic guide post 332 can extend and retract with the compression and reset of the force-applying spring 334 to guide the force-applying spring 334 and prevent the force-applying spring 334 from becoming unstable and bending.

[0079] Referring to Figures 6 and 10, the action alarm mechanism 34 includes: a first signal trigger rod 341, a second signal trigger rod 342, and a limit switch 343. One end of the first signal trigger rod 341 presses against and contacts the top wall of the diaphragm disc 32, and the other end of the first signal trigger rod 341 is rotatably connected to the support frame 35. The second signal trigger rod 342 is disposed above the first signal trigger rod 341, and the second signal trigger rod 342 is rotatably connected to the support frame 35. The limit switch 343 is disposed above the second signal trigger rod 342 and is configured such that when the diaphragm disc 32 is opened, the diaphragm disc 32 drives the first signal trigger rod 341 to rotate synchronously forward with the diaphragm disc 32, and pushes the second signal trigger rod 342 to rotate, thereby triggering the contact of the limit switch 343, causing the limit switch 343 to issue an action signal.

[0080] In some embodiments, the first signal trigger rod 341 is placed on the upper side of the diaphragm disk 32. One end of the first signal trigger rod 341 (the left end as shown in Figure 10) presses against and contacts the top wall of the diaphragm disk 32, and the other end of the first signal trigger rod 341 serves as a rotating end. The rotation axis of the first signal trigger rod 341 can be coaxially arranged with the rotation axis of the connecting rod arm 36, which is rotatably connected to the support frame 35. The connecting rod arm 36 and the first signal trigger rod 341 can be rotatably connected to the support frame 35 through the same pin, which makes the structure of the modular suspended combined pressure relief valve compact.

[0081] When the diaphragm 32 rotates and opens under the action of oil and gas pressure, it pushes the first signal trigger rod 341 on the upper side to rotate synchronously, that is, to rotate clockwise as shown in Figure 10.

[0082] In some embodiments, a pushing protrusion 3411 is provided at the middle position of the first signal trigger rod 341. The pushing protrusion 3411 is configured to press against and contact the bottom end of the second signal trigger rod 342 so that when the first signal trigger rod 341 rotates synchronously with the diaphragm disk 32 in the forward direction, i.e., rotates clockwise, the pushing protrusion 3411 pushes the second signal trigger rod 342 to rotate.

[0083] The second signal trigger rod 342 is rotatably mounted on the support frame 35 at its middle position, and its rotation axis is located directly above the rotation axis of the first signal trigger rod 341. Its bottom end can be located on one side of the first signal trigger rod 341 (the right side as shown in Figure 10), for example, on the right side of the push protrusion 3411. In this way, when the first signal trigger rod 341 rotates clockwise, it can push the second signal trigger rod 342 to rotate counterclockwise, so that the second signal trigger rod 342 presses against the contact of the limit switch 343, triggering the limit switch 343 to issue an action signal.

[0084] In some embodiments, the middle position of the second signal trigger rod 342 is rotatably mounted on the support frame 35, and the top end of the second signal trigger rod 342 is provided with a variable diameter trigger arc plate 3421. The variable diameter trigger arc plate 3421 has a trigger arc portion 34211 and a non-trigger arc portion 34212. Furthermore, a transition arc 34213 is provided between the trigger arc portion 34211 and the non-trigger arc portion 34212. The distance from the trigger arc portion 34211 to the rotation axis of the second signal trigger rod 342 is greater than the distance from the non-trigger arc portion 34212 to the rotation axis of the second signal trigger rod 342. In other words, the radius of the trigger arc 34211 is larger than the radius of the non-trigger arc 34212, so that the trigger arc 34211 can rotate to be directly below the limit switch 343 to press the contact of the limit switch 343 and trigger the limit switch 343. When the non-trigger arc 34212 is placed directly below the limit switch 343, the contact of the limit switch 343 can be in a non-triggering state. Thus, by rotating the second signal trigger rod 342 counterclockwise, the non-trigger arc 34212 is placed directly below the limit switch 343, and the state of the trigger arc 34211 being placed directly below the limit switch 343 can be switched to press the contact of the limit switch 343 to trigger it.

[0085] In some embodiments, the first signal trigger rod 341 is connected to the first reset mechanism 344; and / or, the second signal trigger rod 342 is connected to the second reset mechanism.

[0086] In some embodiments, as shown in Figures 3 to 5, a first signal trigger rod 341 is connected to a first reset mechanism 344. The first reset mechanism 344 is configured to apply a reset force to the first signal trigger rod 341 so that the first signal trigger rod 341 can be reset to a non-trigger position after the diaphragm disk 32 is reset.

[0087] In some embodiments, multiple suspended modular actuation valve body units 3 in the same row can share a first reset mechanism 344. The first reset mechanism 344 can be a manual reset lever, and a rotational force is manually applied to the first reset mechanism 344 so that the first reset mechanism 344 drives the first signal trigger levers 341 of multiple suspended modular actuation valve body units 3 to reset and rotate synchronously.

[0088] In some embodiments, as shown in FIG5, the manual reset rod is provided with a reset support rod 3441, which corresponds one-to-one with the plurality of first signal trigger rods 341 in the row. The reset support rod 3441 can rotate synchronously with the manual reset rod and apply force to the plurality of first signal trigger rods 341 respectively, so that the plurality of first signal trigger rods 341 are synchronously reset and rotated.

[0089] As shown in Figure 4, the two rows of suspended modular actuation valve body units 3 are equipped with two first reset mechanisms 344. To facilitate the rotation of the manual reset lever, in some embodiments, the end of the manual reset lever is provided with a rotating handle 3442.

[0090] In some embodiments, the second signal trigger rod 342 is connected to a second reset mechanism, which is configured to apply a reset force to the second signal trigger rod 342 so that the second signal trigger rod 342 can be reset to a non-trigger position.

[0091] In some embodiments, a second reset mechanism may be provided at the rotation axis of the second signal trigger rod 342. The second reset mechanism may be a torsion spring, with both ends of the torsion spring pressing against the support frame 35 and the second signal trigger rod 342 respectively. In this way, when the second signal trigger rod 342 is triggered to rotate, it can be compressed and deformed, and a reset force can be applied to the second signal trigger rod 342, so that the second signal trigger rod 342 automatically reverses to reset after the first signal trigger rod 341 is reset, so as to contact the trigger of the limit switch 343.

[0092] Therefore, after the diaphragm plate 32 is reset, the second signal trigger rod 342 can be automatically reset under the action of the second reset mechanism by the manual reset of the first reset mechanism 344. Thus, the triggering of the limit switch 343 can only be released by the manual reset of the first reset mechanism 344.

[0093] Referring to Figure 9, the limiting and buffering mechanism 37 includes an arc-shaped support plate 371 and at least one disc spring 372. The arc-shaped support plate 371 is fixedly mounted on the valve housing 2. At least one disc spring 372 is spaced apart on the arc-shaped support plate 371 and is configured to limit and buffer the diaphragm 32 when it is opened to the correct position.

[0094] In some embodiments, at least one disc spring 372 includes one or more disc springs 372 disposed on the arcuate support plate 371, and the plurality of disc springs 372 are spaced apart on the arcuate support plate 371 to limit and buffer multiple parts on the diaphragm plate 32.

[0095] In some embodiments, the number of installation pairs of the suspended modular actuated valve body unit is determined based on the voltage level of the transformer on which the modular suspended combined pressure relief valve is installed.

[0096] In some embodiments, when determining the number of installation pairs of the suspended modular actuated valve body unit based on the voltage level of the transformer on which the modular suspended combined pressure relief valve is installed, the voltage level ΔV of the transformer on which the modular suspended combined pressure relief valve is installed is first obtained.

[0097] Set a preset voltage level reference value matrix V, and set V(V1, V2, V3), where V1 is the first preset voltage level reference value, V2 is the second preset voltage level reference value, and V3 is the third preset voltage level reference value; where V1 < V2 < V3.

[0098] Based on the relationship between the voltage level of the transformer installed in the modular suspended combined pressure relief valve and the reference values ​​of each preset voltage level, the number of installation pairs of the suspended modular actuated valve body unit is determined.

[0099] It can be seen that by determining the installation number of the suspended modular actuation valve body unit based on the relationship between the voltage level of the transformer to which the modular suspended combined pressure relief valve is installed and the reference values ​​of each preset voltage level, the installation number of the suspended modular actuation valve body unit can be effectively adjusted according to the voltage level of the transformer. This allows for the selection of a modular suspended combined pressure relief valve with a suitable installation number of suspended modular actuation valve body units, and the installation of this modular suspended combined pressure relief valve on the corresponding transformer to improve the transformer's venting effect.

[0100] In some embodiments, the number of pairs of suspended modular actuated valve body units is determined based on the relationship between the voltage level of the transformer on which the modular suspended combined pressure relief valve is installed and the reference values ​​of each preset voltage level. This includes: when ΔV < V1, selecting a first preset valve pair P1 as the number of installed pairs of suspended modular actuated valve body units; when V1 ≤ ΔV < V2, selecting a second preset valve pair P2 as the number of installed pairs of suspended modular actuated valve body units; when V2 ≤ ΔV < V3, selecting a third preset valve pair P3 as the number of installed pairs of suspended modular actuated valve body units; and when ΔV ≥ V3, selecting a fourth preset valve pair P4 as the number of installed pairs of suspended modular actuated valve body units.

[0101] It can be seen that as the voltage level of the transformer increases, the number of suspended modular actuation valve body units should be increased. Multiple suspended modular actuation valve body units should be provided on transformers with high voltage levels to ensure that transformers with high voltage levels can quickly and timely eject internal oil and gas, thus avoiding damage to the transformer.

[0102] In some embodiments, each suspended modular actuation valve body unit 3 may be connected to a locking unit, and each locking unit is connected to a controller. The controller is configured to control the locking unit to control the locking or unlocking of the suspended modular actuation valve body unit.

[0103] In some embodiments, the controller is further configured to determine the number of suspended module actuation valve body units to be locked based on the number of installed pairs of suspended module actuation valve body units and the fault energy after the transformer experiences an arc fault, and to lock the corresponding number of suspended module actuation valve body units while unlocking other suspended module actuation valve body units, so that the unlocked suspended module actuation valve body units can be opened after the transformer experiences an arc fault to achieve oil and gas release.

[0104] In some embodiments, the controller is further configured to set a first preset fault energy reference value E1, a second preset fault energy reference value E2, and a third preset fault energy reference value E3, and determine the number of lockable suspended module actuation valve body units based on the relationship between the fault energy after the transformer arc fault and each preset fault energy reference value, combined with the number of installation pairs of the suspended module actuation valve body units.

[0105] The controller includes a processor. The processor may include a central processing unit (CPU), a microprocessor, or an application-specific integrated circuit (ASIC), and may be configured to perform the corresponding operations described in the controller when the processor executes a program stored in a non-transitory computer-readable medium coupled to the controller. The non-transitory computer-readable storage medium may include magnetic storage devices (e.g., hard disks, floppy disks, or magnetic tapes), smart cards, or flash memory devices (e.g., erasable programmable read-only memory (EPROM), cards, sticks, or keyboard drives).

[0106] In some embodiments, based on the relationship between the fault energy after an arc fault in the transformer and various preset fault energy reference values, and in conjunction with the number of installed pairs of the suspended-type modular actuation valve body units, the number of locked suspended-type modular actuation valve body units is determined, including: when E < E1, the number of locked suspended-type modular actuation valve body units is calculated using the formula: j = floor(P / k1). When E1 ≤ E < E2, the number of locked suspended-type modular actuation valve body units is calculated using the formula: j = floor(P / k2). When E2 ≤ E < E3, the number of locked suspended-type modular actuation valve body units is calculated using the formula: j = floor(P / k3). When E ≥ E3, the number of locked suspended-type modular actuation valve body units is determined to be 0.

[0107] Where P is the number of installation pairs of the suspended modular action valve body unit, k1 and k2 are the first locking adjustment coefficient and the second locking adjustment coefficient, respectively, and 1≤k1<2<k2<k3<3.

[0108] In some embodiments, the fault energy after an arc fault occurs in the transformer is calculated using the following formula: E = UIT; where E is the fault energy after an arc fault occurs in the transformer, U is the arc voltage after an arc fault occurs in the transformer, I is the arc current after an arc fault occurs in the transformer, and T is the duration of the current after an arc fault occurs in the transformer.

[0109] It can be seen that by selecting the number of locking units of the suspended-type module action valve body unit by the relationship between the fault energy after the transformer arc fault and the preset fault energy reference values, the number of locking units of the suspended-type module action valve body unit can be effectively adjusted according to the fault energy after the transformer arc fault. Thus, different numbers of suspended-type module action valve body units can be opened for different faults to achieve oil and gas release.

[0110] Furthermore, the higher the fault energy after an arc fault occurs in the transformer, the greater the discharge requirement, and the fewer the number of locking mechanisms in the suspended module action valve unit, in order to ensure the discharge sensitivity of the transformer.

[0111] In summary, the modular suspended-type combined pressure relief valve provided in some embodiments of this disclosure forms a valve cavity by means of a valve seat and a valve body, and forms a large-diameter pressure relief valve by means of an array of modular suspended-type actuating valve body units. The suspended-type actuating valve body unit has a small area and is a suspended structure, so it has a fast opening speed, a fast initial discharge curtain area growth rate, and little mutual influence between the discharge fluids of each nozzle, thus resulting in low overall discharge resistance. This modular suspended-type combined pressure relief valve has advantages such as fast opening speed and fast initial discharge curtain area growth rate. Compared with some linear opening pressure relief valves in some technologies, the modular suspended-type combined pressure relief valve provided in some embodiments of this disclosure has a fast opening speed, a fast initial discharge area growth rate, less interference between discharge flow fields, a large discharge flow rate, and high space utilization.

[0112] Compared to other suspended pressure relief valves, this type of valve can meet different installation orifice diameter requirements through the combination of multiple pressure relief unit modules. Its simple and reliable structure solves the problem of reduced response speed in current linear opening pressure relief valves as the orifice diameter increases, making it difficult to meet the large-diameter venting requirements of converter transformer tanks. Each pressure relief actuation unit is independently designed and manufactured. The number of independent units used is determined based on different installation orifice diameter requirements, and corresponding valve seats and bodies are adapted for installation, greatly reducing development costs and shortening the development cycle. Furthermore, the modular, single suspended actuation valve body unit has a simple and reliable structure, facilitating testing, such as opening pressure and sealing performance tests, which can be conducted independently. It can also be maintained and replaced independently, significantly reducing maintenance costs.

[0113] It should be noted that in the description of this disclosure, the terms "upper", "lower", "left", "right", "inner", "outer", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings. This is merely for the convenience of description and does not indicate or imply that the device or element must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation of this disclosure.

[0114] Furthermore, it should be noted that, in the description of this disclosure, unless otherwise expressly 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 direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this disclosure according to the specific circumstances.

[0115] Obviously, those skilled in the art can make various modifications and variations to this disclosure without departing from its spirit and scope. Therefore, if such modifications and variations fall within the scope of the claims of this disclosure and their equivalents, this disclosure is also intended to include such modifications and variations.

Claims

1. A modular suspended combination pressure relief valve, comprising: Valve seat; A valve housing is disposed on the valve seat and together with the valve seat forms a valve cavity; and At least one pair of suspended modular actuation valve body units, each of the at least one pair of suspended modular actuation valve body units is placed in the valve cavity, the two suspended modular actuation valve body units in each pair are arranged opposite to each other, and each pair of suspended modular actuation valve body units are arranged sequentially in a straight line on the valve seat along the length of the valve seat, and each pair of suspended modular actuation valve body units is configured to open under the action of oil and gas in the oil chamber to realize the release of oil and gas.

2. The modular suspended combined pressure relief valve according to claim 1, wherein, Each suspended modular actuation valve body unit includes: A base is disposed on the valve seat, and a valve port is provided on the base. A support frame is also provided on the base. The base is placed between the valve port and the valve body side plate adjacent to the base. A diaphragm is rotatably connected to the base, and the axis of rotation of the diaphragm is located between the valve port and the valve housing side plate adjacent to the base, so that the two diaphragms of the two centered suspended module actuation valve body units open relative to each other. An elastic pressurizing mechanism is provided, with its two ends rotatably connected to the diaphragm and the support frame, respectively, and configured to apply elastic pressure to the diaphragm to seal it at the valve port, thereby sealing the oil chamber. The pressure of the oil and gas in the oil chamber acting on the diaphragm creates an opening torque relative to the rotation axis of the diaphragm, while the pressure of the elastic pressurizing mechanism acting on the diaphragm creates a resistance torque relative to the rotation axis of the diaphragm. When the opening torque is greater than the resistance torque, the diaphragm rotates open from its sealed position at the valve port to release the oil and gas. An action alarm mechanism is installed on the support frame, and the action alarm mechanism is triggered and sends an action signal when the diaphragm is opened to provide a fault alarm.

3. The modular suspended combined pressure relief valve according to claim 2, wherein, The motion alarm mechanism includes: A first signal trigger rod, one end of which abuts against the top wall of the diaphragm disc, and the other end of which is rotatably connected to the support frame; A second signal trigger rod is disposed above the first signal trigger rod, and the second signal trigger rod is rotatably connected to the support frame; and A limit switch is positioned above the second signal trigger lever and configured such that when the diaphragm is opened, the diaphragm drives the first signal trigger lever to rotate synchronously in the forward direction with the diaphragm, and pushes the second signal trigger lever to rotate, thereby triggering the contacts of the limit switch and causing the limit switch to issue an action signal.

4. The modular suspended combined pressure relief valve according to claim 3, wherein, A pushing protrusion is provided at the middle position of the first signal trigger rod. The pushing protrusion is configured to press against the bottom end of the second signal trigger rod so that when the first signal trigger rod rotates synchronously with the diaphragm disk in the forward direction, the pushing protrusion pushes the second signal trigger rod to rotate.

5. The modular suspended combined pressure relief valve according to claim 3 or 4, wherein, The second signal trigger rod is rotatably mounted on the support frame at its middle position. The top of the second signal trigger rod is provided with a variable diameter trigger arc plate, which has a trigger arc portion and a non-trigger arc portion. Furthermore, a transition arc is provided between the trigger arc portion and the non-trigger arc portion. The distance from the trigger arc portion to the rotation axis of the second signal trigger rod is greater than the distance from the non-trigger arc portion to the rotation axis of the second signal trigger rod, so that the trigger arc portion can rotate to directly below the limit switch to press against the contact of the limit switch and trigger the limit switch.

6. The modular suspended combined pressure relief valve according to any one of claims 3 to 5, satisfying at least one of the following: The first signal trigger rod is connected to a first reset mechanism, which is configured to apply a reset force to the first signal trigger rod so that the first signal trigger rod can be reset to a non-triggering position after the diaphragm is reset; and The second signal trigger rod is connected to a second reset mechanism, which is configured to apply a reset force to the second signal trigger rod so that the second signal trigger rod can be reset to the non-trigger position after the first signal trigger rod is reset.

7. The modular suspended combined pressure relief valve according to any one of claims 2 to 6, wherein, The elastic pressurization mechanism includes: The lower support base is rotatably connected to the diaphragm disk; A spring telescopic guide post, one end of which is connected to the lower support base, and the other end of which is provided with a limiting connecting plate, wherein the limiting connecting plate is rotatably connected to the support frame; A force-applying spring is sleeved on the outer periphery of the spring telescopic guide post, and the force-applying spring is placed between the lower support and the limiting connecting plate. The force-applying spring is configured to elastically compress when the diaphragm is opened and apply a force to the diaphragm so that the diaphragm can return to the sealed position.

8. The modular suspended combined pressure relief valve according to any one of claims 2 to 7, wherein, The valve housing is also provided with a limiting buffer mechanism, which is configured to limit the opening position of the diaphragm and buffer the diaphragm to prevent hard collision between the diaphragm and the valve housing.

9. The modular suspended combined pressure relief valve according to claim 8, wherein, The limiting buffer mechanism includes: An arc-shaped support plate is fixedly installed on the valve body; and At least one disc spring is spaced apart on the arc-shaped support plate and is configured to limit and buffer the diaphragm when the diaphragm is opened into position.

10. The modular suspended combined pressure relief valve according to any one of claims 1 to 9, wherein, The valve body is provided with an oil and gas outlet, and an openable side plate is provided at the oil and gas outlet. The openable side plate is configured to open when the oil and gas in the oil chamber is released into the valve body, so as to discharge the oil and gas in the valve body.

11. The modular suspended combined pressure relief valve according to any one of claims 1 to 10, wherein, Based on the voltage level of the transformer installed in the modular suspended combined pressure relief valve, the number of installation pairs of the suspended modular actuating valve body unit is determined.

12. The modular suspended combined pressure relief valve according to claim 11, wherein, When determining the number of installation pairs of the suspended modular actuated valve body unit based on the voltage level of the transformer on which the modular suspended combined pressure relief valve is installed: Obtain the voltage level ΔV of the transformer on which the modular suspended combined pressure relief valve is installed; Set the first preset voltage level reference value V1, the second preset voltage level reference value V2, and the third preset voltage level reference value V3; and The number of installation pairs of the suspended modular actuation valve body unit is determined based on the relationship between the voltage level of the transformer installed in the modular suspended combined pressure relief valve and the first preset voltage level reference value V1, the second preset voltage level reference value V2, and the third preset voltage level reference value V3.

13. The modular suspended combined pressure relief valve according to claim 12, wherein, The determination of the logarithm of the suspended modular actuation valve body unit based on the relationship between the voltage level of the transformer installed on the modular suspended combined pressure relief valve and the first preset voltage level reference value, the second preset voltage level reference value V2, and the third preset voltage level reference value V3 includes: When ΔV < V1, the first preset valve pair P1 is selected as the number of installation pairs of the suspended-type module action valve body unit; When V1≤ΔV<V2, the second preset valve pair P2 is selected as the number of installation pairs of the suspended-type module action valve body unit; When V2≤ΔV<V3, the third preset valve pair P3 is selected as the number of installation pairs for the suspended-type module actuation valve body unit; and When ΔV≥V3, the fourth preset valve pair P4 is selected as the number of installation pairs of the suspended-type module action valve body unit.

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