A modular suspended combination pressure relief valve

Abstract

The present invention provides a modular suspended combined pressure relief valve. The pressure relief valve comprises: a valve seat, a valve shell and at least one pair of suspended modular action valve body units; wherein the valve shell is arranged on the valve seat and encloses a valve cavity, each suspended modular action valve body unit is placed in the valve cavity, two suspended modular action valve body units in each pair are arranged relatively, and each pair of suspended modular action valve body units are arranged in sequence on the valve seat in a straight line. The present invention forms a large-caliber pressure relief valve by combining modular suspended modular action valve body units in an array. The suspended modular action valve body unit has a small area, a fast opening speed, a fast initial discharge curtain area growth rate, a small mutual influence of the fluid discharged from each nozzle, and a small overall discharge resistance, thereby solving the problem that the existing linear opening pressure relief valve has a reduced response speed as the caliber increases, making it difficult to meet the large-caliber discharge requirements on the converter oil tank.

Description

Technical Field

[0001] The invention relates to the technical field of transformers, and in particular to a modular suspended combined pressure relief valve. Background Art

[0002] When an arc fault occurs in a high-voltage transformer, an arc discharge phenomenon will occur. The arc discharge causes the insulating oil to crack, and a large amount of high-pressure oil and gas will be formed instantly. The transformer tank is a closed space. The rapid gas production process forms a pressure shock wave. If there is no pressure release device, the overpressure generated by the oil and gas will destroy the transformer tank equipment structure and spray out from the cracks, which may cause oil and gas explosions, seriously threatening the safety of personnel and equipment. To solve the above problems, a pressure relief valve will be installed on the transformer tank. When the pressure rises to the opening pressure, the pressure relief valve will open quickly to discharge the high-temperature and high-pressure oil and gas to release the internal pressure, protect the components, and prevent combustion and explosion. After the pressure relief is completed, the pressure relief valve is closed to isolate the residual oil and gas in the oil chamber to prevent secondary combustion and explosion.

[0003] At present, the straight-line opening type is used in the converter oil tank. In the traditional straight-line opening pressure relief valve, the spring is set just above the diaphragm disc. When the pressure of oil and gas on the diaphragm disc is greater than the pressure of the spring on the diaphragm disc, the diaphragm disc will open quickly and rise vertically through the diaphragm disc, thereby releasing the seal between the diaphragm disc and the valve seat mounting hole and forming a discharge channel; due to the structural characteristics, the response speed decreases when the diameter increases. When the installation aperture requirement is large, multiple pressure relief valves are combined together to form an array structure to meet the installation aperture requirement. When designing a large-diameter pressure relief valve, as the nozzle area increases, the diaphragm disc area also increases synchronously, and the diaphragm disc thickness also needs to increase accordingly, otherwise the rigidity of the diaphragm disc structure will decrease, which will lead to an increase in the mass of the diaphragm disc, which exceeds the increase in the area of ​​the diaphragm disc, resulting in a pressure increase of the diaphragm disc that is less than the increase in the mass of the diaphragm disc. The larger the installation aperture of the pressure relief valve, the slower the response speed, which does not meet the response speed requirements of the explosion-proof rapid pressure relief of the transformer oil tank. Summary of the invention

[0004] In view of this, the present invention proposes a modular suspended combination pressure relief valve, which aims to solve the problem that the existing linear opening pressure relief valve has a reduced response speed as the diameter increases, making it difficult to meet the large-diameter discharge requirements of the converter transformer tank.

[0005] The present invention proposes a modular suspended combination pressure relief valve, which includes: a valve seat, a valve shell and at least one pair of suspended modular action valve body units; wherein the valve shell is arranged on the valve seat and surrounds a valve cavity, each of the suspended modular action valve body units is placed in the valve cavity, and the two suspended modular action valve body units in each pair are arranged relatively to each other, and each pair of the suspended modular action valve body units are arranged in sequence on the valve seat in a straight line along the length of the valve seat, and the suspended modular action valve body units are used to open under the action of oil and gas in the oil chamber to achieve the discharge of oil and gas.

[0006] Furthermore, in the above-mentioned modular suspended combination pressure relief valve, each of the suspended modular action valve body units includes: a base, which is arranged on the valve seat, and a valve port is provided on the base, and a support frame is also provided on the base, which is placed between the valve port and the valve shell side plate adjacent to the base; a diaphragm disk, which is rotatably connected to the base, and the rotation axis of the diaphragm disk is placed between the valve port and the valve shell side plate adjacent to the base, so that the two diaphragm disks of each pair of suspended modular action valve body units are relatively opened; an elastic pressurizing mechanism, the two ends of which are respectively connected to the diaphragm disk and the support frame The diaphragm disc is rotatably connected to apply elastic pressure to the diaphragm disc so that the diaphragm disc can be sealed at the valve port to achieve sealing of the oil chamber; the pressure of the oil and gas in the oil chamber acting on the diaphragm disc forms an opening torque relative to the rotating axis of the diaphragm disc, and the pressure of the elastic pressurizing mechanism acting on the diaphragm disc forms a resistance torque relative to the rotating axis of the diaphragm disc; when the opening torque is greater than the resistance torque, the diaphragm disc rotates and opens from the sealing position at the valve port to release oil and gas; an action alarm mechanism is arranged on the support frame, and is triggered when the diaphragm disc is opened and sends an action signal to perform a fault alarm.

[0007] Furthermore, in the above-mentioned modular suspended combination pressure release valve, the action alarm mechanism includes: a first signal trigger rod, a second signal trigger rod and a travel switch; wherein, one end of the first signal trigger rod is pressed and contacted on the top wall of the diaphragm disk, and the other end is rotatably connected to the support frame; the second signal trigger rod is arranged above the first signal trigger rod, and the second signal trigger rod is rotatably connected to the support frame, and the travel switch is placed above the second signal trigger rod, and is used for, when the diaphragm disk is opened, the diaphragm disk drives the first signal trigger rod to rotate synchronously with the diaphragm disk in the forward direction, and pushes the second signal trigger rod to rotate, so as to trigger the contacts of the travel switch, so that the travel switch sends an action signal.

[0008] Furthermore, in the above-mentioned modular suspended combination pressure release valve, a pushing protrusion is provided at the middle position of the first signal trigger rod, which is used to press and contact 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] Furthermore, in the above-mentioned modular suspended combination pressure release valve, the middle position of the second signal trigger rod is rotatably arranged on the support frame, and the top end of the second signal trigger rod is provided with a variable diameter trigger arc plate, and 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, and 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 the bottom of the travel switch to press the contacts of the travel switch to trigger the travel switch.

[0010] Furthermore, in the above-mentioned modular suspended combination pressure release valve, the first signal trigger rod is connected to a first reset mechanism for applying 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 disk is reset; and / or, the second signal trigger rod is connected to a second reset mechanism for applying a reset force to the second signal trigger rod so that the second signal trigger rod can be reset to a non-trigger position after the first signal trigger rod is reset.

[0011] Furthermore, in the above-mentioned modular suspended combination pressure relief valve, the elastic pressurizing mechanism includes: a lower support seat, which is rotatably connected to the diaphragm disk; a spring telescopic guide column, one end of which is connected to the lower support seat, and the other end is provided with a limit connecting plate, and the limit connecting plate is rotatably connected to the support frame; a force spring, which is sleeved on the outer periphery of the spring telescopic guide column, and the force spring is placed between the lower support seat and the limit connecting plate, and is used for elastic compression when the diaphragm disk is opened, and applies a force to the diaphragm disk so that the diaphragm disk can be reset to a sealing position.

[0012] Furthermore, in the above-mentioned modular suspended combination pressure relief valve, a limit buffer mechanism is also provided inside the valve housing, which corresponds one-to-one with the diaphragm disk and is used to limit the opening position of the diaphragm disk and buffer the diaphragm disk to prevent hard collision between the diaphragm disk and the valve housing.

[0013] Furthermore, in the above-mentioned modular suspended combination pressure relief valve, the limiting and buffering mechanism includes: an arc-shaped support plate, fixedly mounted on the valve housing; and a plurality of disc springs, arranged at intervals on the arc-shaped support plate, for limiting and buffering the diaphragm disc when the diaphragm disc is opened into place.

[0014] Furthermore, in the above-mentioned modular suspended combination pressure relief valve, an oil and gas outlet is provided on the valve housing, and an open side plate is provided at the oil and gas outlet. The open side plate is used to open when the oil and gas in the oil chamber are discharged into the valve housing to discharge the oil and gas in the valve housing.

[0015] Furthermore, the modular suspended combination pressure relief valve determines the number of installation pairs of the suspended modular action valve body units based on the voltage level of the transformer in which the modular suspended combination pressure relief valve is installed.

[0016] Furthermore, for the modular suspended combined pressure relief valve, when determining the number of installation pairs of suspended modular action valve body units based on the voltage level of the transformer on which the modular suspended combined pressure relief valve is installed:

[0017] First, the voltage level ΔV of the transformer on which the modular suspended combined pressure relief valve is installed is obtained;

[0018] Setting 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;

[0019] The installation pair number of the modular suspended combined pressure relief valve is determined based on the relationship between the voltage level of the transformer installed in the modular suspended combined pressure relief valve and each of the preset voltage level reference values.

[0020] Furthermore, the modular suspended combined pressure relief valve is configured to determine the number of the suspended modular action valve body units according to the relationship between the voltage level of the transformer installed in the modular suspended combined pressure relief valve and each of the preset voltage level reference values, specifically:

[0021] When ΔV<V1, the first preset valve pair P1 is selected as the installation pair number of the suspended module action valve body unit;

[0022] When V1≤ΔV<V2, the second preset valve pair P2 is selected as the installation pair number of the suspended module action valve body unit;

[0023] When V2≤ΔV<V3, the third preset valve pair P3 is selected as the installation pair number of the suspended module action valve body unit;

[0024] When ΔV≥V3, the fourth preset valve pair P4 is selected as the installation pair number of the suspended modular action valve body unit.

[0025] The modular suspended combination pressure relief valve provided by the present invention forms a valve cavity by enclosing a valve seat and a valve shell, and forms a large-caliber pressure relief valve by array-combining modular suspended module action valve body units. The suspended module action valve body unit has a small area and is a suspended structure, so the opening speed is fast, the initial discharge curtain area increases rapidly, and the fluid discharged from each nozzle has little influence on each other, so the overall discharge resistance is small. The modular suspended combination pressure relief valve has the advantages of fast opening speed and fast initial discharge curtain area increase. Compared with the original linear opening pressure relief valve, it has a fast opening speed and a fast initial discharge area increase. The modular suspended combination pressure relief valve has little interference between discharge flow fields, a large discharge flow rate, and high space utilization. Compared with other suspended type The pressure relief valve can meet different installation aperture requirements through the combination of multiple pressure relief unit modules. It has a simple and reliable structure and solves the problem that the existing linear opening pressure relief valve has a reduced response speed as the aperture increases, making it difficult to meet the large-aperture discharge requirements on the converter transformer tank. Each pressure release action unit is independently designed and manufactured, and then the number of independent units to be used is determined according to different installation aperture requirements, and the corresponding valve seats and valve shells are adapted for installation, which greatly reduces the development cost and shortens the development cycle. At the same time, the modular single suspended module action valve body unit has a simple and reliable structure and is also convenient for testing. For example, the opening pressure and sealing performance tests can be tested independently, and can also be maintained and replaced independently, which greatly reduces the maintenance cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Various other advantages and benefits will become apparent to those of ordinary skill in the art by reading the detailed description of the preferred embodiments below. The accompanying drawings are only for the purpose of illustrating the preferred embodiments and are not to be considered as limiting the present invention. Moreover, the same reference symbols are used throughout the accompanying drawings to represent the same components. In the accompanying drawings:

[0027] Figure 1 A schematic structural diagram of a modular suspended combined pressure relief valve provided in an embodiment of the present invention;

[0028] Figure 2 A schematic diagram of the structure of a modular suspended combined pressure relief valve opened laterally provided in an embodiment of the present invention;

[0029] Figure 3 A schematic diagram of the internal structure of a modular suspended combination pressure relief valve provided in an embodiment of the present invention;

[0030] Figure 4A schematic structural diagram of the opening of a suspended module action valve body unit in a modular suspended combination pressure relief valve provided in an embodiment of the present invention;

[0031] Figure 5 A cross-sectional view of the internal structure of a modular suspended combination pressure relief valve provided in an embodiment of the present invention;

[0032] Figure 6 A structural schematic diagram of the sealing state of a suspended modular action valve body unit provided in an embodiment of the present invention;

[0033] Figure 7 A schematic structural diagram of the open state of the suspended modular action valve body unit provided by an embodiment of the present invention;

[0034] Figure 8 A front view of a suspended modular action valve body unit provided in an embodiment of the present invention;

[0035] Fig. 9 A cross-sectional view of a suspended modular action valve body unit provided in an embodiment of the present invention;

[0036] Fig.10 A side view of a partial position of a suspended modular action valve body unit provided by an embodiment of the present invention;

[0037] Description of the reference numerals: 1-valve seat, 11-mounting hole, 2-valve housing, 21-oil and gas outlet, 22-opening side plate, 3-hinged module action valve body unit, 31-base, 311-valve port, 312-sealing ring, 313-pressure ring, 32-diaphragm disc, 321-hinge plate, 33-elastic pressure mechanism, 331-lower support seat, 332-spring telescopic guide column, 333-limiting connecting plate, 334-force spring, 34-action alarm mechanism, 341-first signal trigger Rod, 3411-pushing protrusion, 342-second signal trigger rod, 3421-variable diameter trigger arc plate, 34211-trigger arc portion, 34212-non-trigger arc portion, 34213-transition arc, 343-travel switch, 344-first reset mechanism, 3441-reset support rod, 3442-rotating handle, 35-support frame, 36-connecting rod rotating arm, 361-slide groove, 362-limiting plate, 37-limiting buffer mechanism, 371-arc support plate, 372-disc spring. DETAILED DESCRIPTION

[0038] Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although exemplary embodiments of the present disclosure are shown in the accompanying drawings, it should be understood that the present disclosure can be implemented in various forms and should not be limited by the embodiments set forth herein. On the contrary, these embodiments are provided in order to enable a more thorough understanding of the present disclosure and to be able to fully convey the scope of the present disclosure to those skilled in the art. It should be noted that, in the absence of conflict, the embodiments of the present invention and the features described in the embodiments can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0039] See also Figures 1 to 5 , which shows the preferred structure of the modular suspended combination pressure relief valve provided by the embodiment of the present invention. As shown in the figure, the modular suspended combination pressure relief valve comprises: a valve seat 1, a valve housing 2 and at least one pair of suspended modular action valve body units 3.

[0040] The valve housing 2 is arranged on the valve seat 1 and encloses a valve cavity. Each suspended module action valve body unit 3 is placed in the valve cavity. The two suspended module action valve body units 3 in each pair are arranged opposite to each other. Moreover, each pair of suspended module action valve body units 3 is arranged along the length direction of the valve seat 1 (such as Figure 3 The oblique direction shown in the figure) are arranged linearly on the valve seat 1 in sequence, and the cantilever module action valve body unit 3 is used to open under the action of oil and gas in the oil chamber to achieve the discharge of oil and gas.

[0041] Specifically, the valve housing 2 can be a shell structure with an opening at the bottom end, and its cover is arranged on the valve seat 1, and a valve cavity is formed between the two, and the valve housing 2 and the valve seat 1 can be connected by welding or bolts; in order to facilitate the replacement and maintenance of the internal suspended modular action valve body unit 3, preferably, the valve housing 2 and the valve seat 1 are detachably connected, for example, fixed by bolt connection, or connected by other means, which is not limited in this embodiment. In this embodiment, the valve seat 1 is provided with mounting holes 11 arranged in a matrix, that is, two rows and at least one column of openings, which correspond to the suspended modular action valve body units 3 one by one, and are used to install the suspended modular action valve body units 3, so that the suspended modular action valve body units 3 are installed one by one at the mounting holes 11 of the valve seat 1. The two suspended modular action valve body units 3 in each pair are arranged relative to each other so that they can be opened relative to each other, so that the opening plates, i.e., the diaphragm discs 31 of the two suspended modular action valve body units 3 are placed on the left and right sides of the two suspended modular action valve body units 3 (relative to the left and right sides of the two suspended modular action valve body units 3). Figure 4 As for the position shown in the figure), each pair of suspended module action valve body units 3 are along the length direction of the valve seat 1 (such as Figure 3The oblique direction shown in the figure) are arranged linearly on the valve seat 1 in sequence to form a two-row multi-column structure. Of course, when there is a pair of suspended modular action valve body units 3, a one-column structure is formed. In the present embodiment, the suspended modular action valve body unit 3 is installed on the valve seat 1 in a detachable manner so as to facilitate the later replacement and maintenance of the suspended modular action valve body unit 3. In the oil chamber, i.e., the inside of the transformer, arc discharge will occur when a low-resistance fault occurs, causing the insulating oil to vaporize and crack, instantly forming a large amount of high-temperature and high-pressure oil and gas, which will stimulate pressure shock, and the suspended modular action valve body unit 3 can be opened so that the oil and gas can be discharged and sprayed out. In the present embodiment, three pairs of suspended modular action valve body units 3, i.e., six suspended modular action valve body units 3, are used as an example for explanation. Of course, the suspended modular action valve body unit 3 can also be a pair or other numbers, which is not limited in the present embodiment. Among them, the bottom end of the valve seat 1 can be fixedly mounted on the transformer by bolts and other connecting parts.

[0042] The pressure relief valve used in the current converter transformer oil tank is generally a circular diaphragm disk. When the pressure reaches the set value, the diaphragm disk rises and opens to form a discharge. When the required installation aperture is larger, the larger the installation aperture, the slower the response speed. Therefore, in actual use, there are few pressure relief valves with a diameter exceeding 180mm.

[0043] In this embodiment, the valve seat 1 can be a rectangular structure, and the valve housing 2 can be a cuboid structure, which is surrounded to form a cuboid valve cavity structure. Compared with other structures such as a cylinder, the cuboid structure is easy to assemble, that is, multiple valve seats 1 and valve housings 2 are assembled to adapt to different installation aperture requirements. At the same time, compared with other structures, the cuboid structure greatly increases the internal space, which can increase the layout space of the suspended module action valve body unit 3, especially the space of the elastic pressure mechanism 33 of the suspended module action valve body unit 3, so that the elastic pressure mechanism 33 has sufficient compression, thereby improving the performance of the suspended module action valve body unit 3.

[0044] At the same time, the pressure relief valve in the prior art is an integrated structure, that is, multiple small-caliber traditional pressure relief valve action units are arranged in the same pressure relief valve housing. Due to the height limit, the discharged fluids affect each other, and the actual discharge capacity is weakened. At the same time, the main force is borne on the housing. During the test, it needs to be inspected as a whole, and the pressure relief valve is large, so the test bench cannot detect it, such as sealing and high temperature tests; in addition, the pressure relief valve is large, the housing is large, and it has many functions, resulting in a short life; at the same time, the pressure relief valve is an integrated structure, and it needs to be replaced and adjusted as a whole during maintenance and replacement, which greatly increases the maintenance cost. The modular suspended combined pressure relief valve provided in this embodiment is a modular structure, that is, each suspended modular action valve body unit 3 is a small unit, which can be independently inspected and maintained and replaced, which is convenient for inspection and replacement, and greatly reduces the maintenance cost.

[0045] To facilitate adaptation to different installation hole diameters, preferably, the valve housing 2 and the valve seat 1 can both be assembled structures, and each assembly unit can be adapted to a pair of suspended modular action valve body units 3. By assembling multiple assembly units, the assembly of multiple different numbers of suspended modular action valve body units 3 can be achieved.

[0046] In this embodiment, the valve housing 2 is provided with an oil and gas outlet 21, and an open side plate 22 is provided at the oil and gas outlet 21. The open side plate 22 is used to open when the oil and gas in the oil chamber are discharged into the valve cavity to discharge the oil and gas in the valve cavity. Specifically, both ends of the valve housing 2 can be provided with an oil and gas outlet 21, and an open side plate 22 can be provided at the oil and gas outlet 21. The open 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 excite the pressure impact to open the suspended module actuation valve body unit 3, enter the valve cavity, and be discharged from the oil and gas outlet 21 to achieve the discharge of oil and gas. Of course, the oil and gas outlet 21 and the open side plate 22 can also be set on the side plate or the top plate, and there is no limitation on their setting positions in this embodiment. In this embodiment, the oil and gas outlet 21 and the open side plate 22 are arranged on the side ends of the valve housing 2, which is convenient for the side ends to be assembled. It is only necessary to install the two end sides after assembly. That is to say, the two end sides of each assembly unit of the valve housing 2 are provided with oil and gas outlets. Not only can the open side plate 22 be installed as an oil and gas outlet, but also multiple assembly units can be assembled. Among them, the oil and gas outlet 21 can be a rectangular structure, and one side of the open side plate 22 is rotatably connected to the valve housing 2, which can be connected by a hinge. When the suspended module action valve body unit 3 inside the pressure release valve opens to discharge, the inside of the valve cavity is filled with fluid, and the open side plate 22 rotates relative to the hinge center under the action of pressure to open and complete the discharge process to the outside. Preferably, the top side of the open side plate 22 is rotatably connected to the valve housing 2, so that the open side plate 22 can be automatically closed after the oil and gas are discharged.

[0047] See also Figures 6 to 9 , which shows the preferred structure of the suspended module action valve body unit provided by the embodiment of the present invention. As shown in the figure, the suspended module action valve body unit 3 includes: a base 31, a diaphragm plate 32, an elastic pressure mechanism 33, an action alarm mechanism 34 and a support frame 35; wherein,

[0048] The base 31 is disposed on the valve seat 1 , and a valve port 311 is disposed on the base 31 . A support frame 35 is also disposed on the base 31 , and is placed between the valve port 311 and the side plate of the valve housing 2 adjacent to the base 31 .

[0049] Specifically, the base 31 can be fixedly mounted on the mounting hole 11 corresponding to the valve seat 1 by bolts. The base 31 is provided with a valve port 311, which is communicated with the mounting hole 11 on the valve seat 1, so that the closure of the communication channel is achieved by closing the valve port 311. A support frame 35 can be fixedly mounted on the base 31, and the support frame 35 is placed on the opposite side of the opening side of the valve port 311, that is, the support frame 35 is placed on one side of the valve port 311 and is arranged close to the side plate of the adjacent valve housing 2, such as Figure 5 As shown, the support frame 35 of the left suspended modular action valve body unit 3 is placed on the left side of the valve port 311 on the left base 31, and the support frame 35 of the right suspended modular action valve body unit 3 is placed on the right side of the valve port 311 on the right base 31, so as to support the elastic pressure mechanism 33, the action alarm mechanism 34, etc. through the support frame 35, so that the fixed sides of the elastic pressure mechanism 33 and the action alarm mechanism 34 are supported on both sides of the two suspended modular action valve body units 3, which will interfere with the flow of oil and gas compared to being placed in the middle of the two suspended modular action valve body units 3.

[0050] The diaphragm disc 32 is rotatably connected to the base 31 for sealing or opening the valve port 311, and the rotation axis of the diaphragm disc 32 and the support frame 35 are placed on the same side of the valve port 311 (eg, Fig. 9 on the right side as shown) so that the two diaphragm discs of the two suspended modular action valve body units in each pair are relatively opened.

[0051] Specifically, the diaphragm disc 32 is connected to the base 31 in a rotatable manner to achieve the opening and sealing of the valve port 311. In order to improve the sealing performance at the valve port 311, preferably, a sealing ring 312 is provided at the valve port 311, and the sealing ring 312 is arranged along the entire circumference of the valve port 311 to increase the sealing performance between the two when the diaphragm disc 32 is covered at the valve port 311; in this embodiment, a pressing ring 313 is provided on the sealing ring 312 to press the sealing ring 312 to the valve port 311, and the pressing ring 313, the sealing ring 312 and the base 31 are connected by bolts and other connecting parts. Among them, as Fig. 9 As shown, the cross section of the sealing ring 312 can be a Z-shaped structure to be pressed and fixed on the protrusion of the valve port 311. In order to realize the opening of the diaphragm disc 32, preferably, the diaphragm disc 32 and the base 31 are connected by a connecting rod arm 36. A hinge plate 321 is provided on the top wall of the diaphragm disc 32, and the first end of the connecting rod arm 36 (such as Fig. 9 The right end shown in FIG. 1 is rotatably connected to the support frame 35 through a pin, and the second end (as shown in FIG. Figure 7 In order to improve the adaptability of the sealing of the diaphragm disc 32, that is, to ensure that the diaphragm disc 32 seals the valve port 311 uniformly around the entire circumference, preferably, the second end of the connecting rod arm 36 (such as Figure 7The diaphragm disc 32 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 through a pin shaft, so that the diaphragm disc 32 can rotate relative to the connecting rod arm 36, so that when the sealing is inconsistent, the diaphragm disc 32 can be smoothly sealed on the valve port 311 through relative rotation, so that the diaphragm disc 32 has a certain degree of adaptability, that is, the consistency of the sealing is ensured, and the sealing effect of the diaphragm disc 32 on the valve port 311 is improved. In order to prevent the diaphragm disc 32 from rotating too much relative to the connecting rod arm 36 so that the diaphragm disc 32 cannot be reset, preferably, the second end of the connecting rod arm 36 is provided with two limit plates 362, which are respectively placed on both sides of the rotating shaft of the second end of the connecting rod arm 36 (such as Fig. 9 The left and right sides shown in the figure) are used to limit the diaphragm disc 32 from the connecting rod rotating arm 36 and the two sides of the rotating shaft of the diaphragm disc 32 to limit the relative rotation angle of the diaphragm disc 32.

[0052] The two ends of the elastic pressurizing mechanism 33 are rotatably connected to the diaphragm disc 32 and the support frame 35 respectively, and are used to apply elastic pressure to the diaphragm disc 32 so that the diaphragm disc 32 can be sealed at the valve port 311 to achieve the sealing of the oil chamber; the pressure of the oil and gas in the oil chamber acting on the diaphragm disc 32 forms an opening torque relative to the rotating axis of the diaphragm disc 32, and the pressure of the elastic pressurizing mechanism 33 acting on the diaphragm disc 32 forms a resistance torque relative to the rotating axis of the diaphragm disc 32; when the opening torque is greater than the resistance torque, the diaphragm disc 32 rotates open from the sealing position at the valve port 311 to release oil and gas.

[0053] Specifically, the first end of the elastic pressure mechanism 33 (such as Figure 6 The upper right end shown in FIG. 1 is connected to the support frame 35 in a rotatable manner, for example, by a pin, and the second end (as shown in FIG. Figure 6 The lower left end shown in the figure) is connected to the connecting rod arm 36 in a rotatable manner, and can also be rotatably connected by a pin. In this embodiment, the valve cavity is a rectangular parallelepiped structure, which optimizes the design space of the elastic pressure mechanism 33, and then selects more optimal parameters to avoid the elastic pressure mechanism 33 from exceeding its allowable value due to excessive compression during the opening process, thereby avoiding the failure of the elastic pressure mechanism 33. Of course, the second end of the elastic pressure mechanism 33 (such as Figure 6 The lower left end shown in the figure can also be connected to the connecting rod arm 36 in a rotatable and slidable manner, that is, a slide groove 361 is provided on the connecting rod arm 36 along its length direction, and the second end of the elastic pressure mechanism 33 is rotatably arranged in the slide groove 361 through a pin shaft, and the pin shaft can also slide along the length direction of the slide groove 361, so that the elastic pressure mechanism 33 has a certain amount of activity, thereby further avoiding the failure of the elastic pressure mechanism 33. In this embodiment, the elastic pressure mechanism 33, the support frame 35 and the connecting rod arm 36 can all be two, which can improve the opening and closing stability of the membrane disc 32.

[0054] The action alarm mechanism 34 is arranged on the support frame 35, and is triggered and sends an action signal when the membrane disc 32 is opened to perform a fault alarm. Specifically, the action alarm mechanism 34 can be installed on the support frame 35, and when the membrane disc 32 is opened, the membrane disc 32 triggers the action alarm mechanism 34, so that the action alarm mechanism 34 sends an action signal to perform a fault alarm.

[0055] In this embodiment, in order to prevent the diaphragm disc 32 from being deformed due to a hard collision with the valve housing 2 after the diaphragm disc 32 is opened, preferably, a limit buffer mechanism 37 is further provided inside the valve housing 2, which corresponds to the diaphragm disc 32 one by one, and is used to limit the opening position of the diaphragm disc 32, and to buffer the diaphragm disc 32, that is, to alleviate the impact, so as to prevent the hard collision between the diaphragm disc 32 and the valve housing 2. Specifically, the limit buffer mechanism 37 can be arranged between the two support frames 35, and the opening position of the diaphragm disc 32 can be limited, so that the diaphragm disc 32 stops rotating under the action of the limit buffer mechanism 37 after opening to a preset angle, that is, to limit the opening limit position of the diaphragm disc 32, and the limit buffer mechanism 37 can also buffer the diaphragm disc 32 to avoid the impact deformation of the diaphragm disc 32. Among them, the corresponding opening angle α can be determined according to actual conditions.

[0056] Continue to see Fig. 9 The elastic pressure mechanism 33 includes: a lower support seat 331, a spring telescopic guide column 332, a limit connecting plate 333 and a force spring 334; wherein the lower support seat 331 is connected to the film disc 32 in a rotatable manner; one end of the spring telescopic guide column 332 (such as Fig. 9 The lower left end shown in FIG. 1 is connected to the lower support seat 331, and the other end (as shown in FIG. Fig. 9 A limit connecting plate 333 is provided at the upper right end (as shown in the figure), and the limit connecting plate 333 is rotatably connected to the support frame 35; a force spring 334 is sleeved on the outer periphery of the spring telescopic guide column 332, and the force spring 334 is placed between the lower support seat 331 and the limit connecting plate 333, and is used for elastic compression when the diaphragm disc 32 is opened, and exerting a force on the diaphragm disc 32 so that the diaphragm disc 32 can be reset to the sealing position.

[0057] Specifically, the two ends of the spring telescopic guide column 332 are connected to the lower support seat 331 and the limit connecting plate 333 respectively, and can be connected by welding or other methods. For example, the spring telescopic guide column 332 and the limit connecting plate 333 are an integral structure, and a pin is provided on the lower support seat 331, and the pin is rotatably and slidably arranged in the slide groove 361. The limit connecting plate 333 is rotatably connected to the support frame 35 through the pin. The force spring 334 is sleeved on the outer periphery of the spring telescopic guide column 332 and is placed between the lower support seat 331 and the limit connecting plate 333. The two ends can be connected to the lower support seat 331 and the limit connecting plate 333 respectively. The spring telescopic guide column 332 can be extended and retracted with the compression and reset of the force spring 334, and the force spring 334 is guided to avoid the unstable bending of the force spring 334.

[0058] Continue to see Figure 6 and Fig.10 The action alarm mechanism 34 includes: a first signal trigger rod 341, a second signal trigger rod 342 and a travel switch 343; wherein, one end of the first signal trigger rod 341 is pressed against the top wall of the diaphragm disc 32, and the other end is rotatably connected to the support frame 35; the second signal trigger rod 342 is arranged above the first signal trigger rod 341, and the second signal trigger rod 342 is rotatably connected to the support frame 35, and the travel switch 343 is placed above the second signal trigger rod 342, which is used for the diaphragm disc 32 to drive the first signal trigger rod 341 to rotate synchronously with the diaphragm disc 32 when the diaphragm disc 32 is opened, and to push the second signal trigger rod 342 to rotate, so as to trigger the contact of the travel switch 343, so that the travel switch 343 sends an action signal.

[0059] Specifically, the first signal trigger rod 341 is disposed on the upper side of the film disc 32, and one end of the first signal trigger rod 341 (such as Fig.10 The left end as shown in the figure is pressed against the top wall of the diaphragm disc 32, and the other end is used 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 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 shaft, which can make the modular suspended combination pressure release valve compact. When the diaphragm disc 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, Fig.10In this embodiment, a pushing protrusion 3411 is provided at the middle position of the first signal trigger rod 341, which is used to press 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 film disk 32 in the positive direction, that is, rotates clockwise, the pushing protrusion 3411 pushes the second signal trigger rod 342 to rotate. The middle position of the second signal trigger rod 342 is rotatably set on the support frame 35, and the rotation axis is placed directly above the rotation axis of the first signal trigger rod 341, and the bottom end can be placed on one side of the first signal trigger rod 341 (such as Fig.10 As shown in the figure, in particular, it is placed on the right side of the pushing protrusion 3411, and 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 the contact of the travel switch 343, triggering the travel switch 343, so that the travel switch 343 sends an action signal.

[0060] In this embodiment, the middle position of the second signal trigger rod 342 is rotatably arranged on the support frame 35, and the top of the second signal trigger rod 342 is provided with a variable diameter trigger arc plate 3421, and the variable diameter trigger arc plate 3421 has a trigger arc portion 34211 and a non-trigger arc portion 34212, and a transition arc 34213 is provided between the trigger arc portion 34211 and the non-trigger arc portion 34212, and 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, that is, the radius of the trigger arc portion 34211 The radius of the non-trigger arc portion 34212 is larger than that of the non-trigger arc portion 34212, so that the trigger arc portion 34211 can rotate to the bottom of the travel switch 343 to press the contact of the travel switch 343 to trigger the travel switch 343. When the non-trigger arc portion 34212 is placed directly below the travel switch 343, the contact of the travel switch 343 can be in a non-trigger state, and then through the counterclockwise rotation of the second signal trigger rod 342, the non-trigger arc portion 34212 is placed directly below the travel switch 343 and switches to the state where the trigger arc portion 34211 is placed directly below the travel switch 343, and the contact of the travel switch 343 can be pressed and triggered.

[0061] In this embodiment, if Figures 3 to 5As shown, the first signal trigger rod 341 is connected to a first reset mechanism 344 for applying 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. Specifically, a plurality of suspended modular action valve body units 3 in the same row can share a first reset mechanism 344, which can be a manual reset rod, 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 rods 341 of the plurality of suspended modular action valve body units 3 to reset and rotate synchronously. In this embodiment, as Figure 5 As shown, the manual reset rod is provided with a reset support rod 3441, which corresponds to the row of multiple first signal trigger rods 341 one by one, can rotate synchronously with the manual reset rod, and apply force to the multiple first signal trigger rods 341 respectively, so that the multiple first signal trigger rods 341 are reset and rotate synchronously. Figure 4 As shown, two rows of suspended modular action valve body units 3 are provided with two first reset mechanisms 344. Figure 4 As shown, in order to facilitate the rotation of the manual reset rod, preferably, a rotating handle 3442 is provided at the end of the manual reset rod.

[0062] In this embodiment, the second signal trigger rod 342 is connected to a second reset mechanism (not shown in the figure), which is used 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. Specifically, a second reset mechanism can be provided at the rotation axis of the second signal trigger rod 342. The second reset mechanism can be a torsion spring, and the two ends of the second reset mechanism are respectively pressed against the support frame 35 and the second signal trigger rod 342. 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 and resets after the first signal trigger rod 341 is reset, so as to contact the trigger of the travel switch 343.

[0063] It can be seen from this that after the diaphragm disk 32 is reset, the second signal trigger rod 342 can be automatically reset under the action of the second reset mechanism through manual reset of the first reset mechanism 344. Therefore, only by manually resetting the first reset mechanism 344 can the trigger of the travel switch 343 be released.

[0064] Continue to see Fig. 9The limit buffer mechanism 37 includes: an arc-shaped support plate 371 and a plurality of disc springs 372; wherein the arc-shaped support plate 371 is fixedly mounted on the valve housing 2; a plurality of disc springs 372 are arranged at intervals on the arc-shaped support plate 371, and are used to limit and buffer the diaphragm disc 32 when the diaphragm disc 32 is opened to the right position. Specifically, there can be one or more disc springs 372, which are arranged on the arc-shaped support plate 371 and are arranged at intervals on the arc-shaped support plate 371, so as to limit and buffer multiple positions on the diaphragm disc 32.

[0065] In this embodiment, the number of installation pairs of the modular suspended action valve body units is determined based on the voltage level of the transformer in which the modular suspended combination pressure relief valve is installed.

[0066] Specifically, when determining the number of installation pairs of the suspended modular action valve body units based on the voltage level of the transformer installed on the modular suspended combined pressure relief valve:

[0067] First, the voltage level ΔV of the transformer where the modular suspended combined pressure relief valve is installed is obtained;

[0068] Setting a preset voltage level reference value matrix V, setting V (V1, V2, V3), wherein V1 is a first preset voltage level reference value, V2 is a second preset voltage level reference value, and V3 is a third preset voltage level reference value; wherein V1 < V2 < V3;

[0069] According to the relationship between the voltage level of the transformer installed in the modular suspended combination pressure relief valve and the reference values ​​of each preset voltage level, the installation pair number of the suspended modular action valve body unit is determined.

[0070] It can be seen that by selecting the installation pair number of the suspended modular action valve body unit based on the relationship between the voltage level of the transformer on which the modular suspended combination pressure relief valve is installed and each preset voltage level reference value, the installation pair number of the suspended modular action valve body unit can be effectively adjusted according to the voltage level of the transformer, so that the modular suspended combination pressure relief valve with a suitable installation pair number of suspended modular action valve body units can be selected and installed on the corresponding transformer to improve the discharge effect of the transformer.

[0071] In this embodiment, the number of pairs of suspended modular action valve body units is determined according to the relationship between the voltage level of the transformer installed in the modular suspended combined pressure relief valve and each preset voltage level reference value, specifically:

[0072] When ΔV<V1, the first preset valve pair P1 is selected as the installation pair of the suspended module action valve body unit;

[0073] When V1≤ΔV<V2, the second preset valve pair P2 is selected as the installation pair of the suspended module action valve body unit;

[0074] When V2≤ΔV<V3, the third preset valve pair P3 is selected as the installation pair of the suspended module action valve body unit;

[0075] When ΔV≥V3, the fourth preset valve pair P4 is selected as the installation pair of the suspended module action valve body unit.

[0076] It can be seen that when the voltage level of the transformer is larger, the number of installation pairs of the suspended module action valve body units is increased, and multiple suspended module action valve body units are provided on the transformer with a large voltage level to ensure that the transformer with a large voltage level can spray out the internal oil and gas in time and quickly to avoid damage to the transformer.

[0077] In this embodiment, each suspended modular action valve body unit 3 may be connected to a locking unit, and each locking unit is connected to a control unit for controlling the locking unit to control the locking or unlocking of the suspended modular action valve body unit.

[0078] Specifically, the control unit is also used to determine the number of locked suspended module actuating valve body units based on the installed number of suspended module actuating valve body units and the fault energy after an arc fault occurs in the transformer, and to lock a corresponding number of suspended module actuating valve body units and unlock other suspended module actuating valve body units, so that the unlocked suspended module actuating valve body units can be opened to achieve oil and gas discharge after an arc fault occurs in the transformer.

[0079] In this embodiment, the control unit is also used 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 determines the number of locked suspended module action valve body units based on the relationship between the fault energy after an arc fault occurs in the transformer and each preset fault energy reference value, combined with the installation logarithm of the suspended module action valve body units.

[0080] Specifically, according to the relationship between the fault energy after the transformer arc fault occurs and each preset fault energy reference value, combined with the number of installation pairs of the suspended module action valve body unit, the number of locked suspended module action valve body units is determined, specifically:

[0081] When E<E1, the locking quantity of the suspended module action valve body unit is calculated using the formula:

[0082] j = floor(P / k1);

[0083] When E1≤E<E2, the locking quantity of the suspended module action valve body unit is calculated using the formula:

[0084] j = floor(P / k2);

[0085] When E2≤E<E3, the locking quantity of the suspended module action valve body unit is calculated using the formula:

[0086] j = floor(P / k3);

[0087] When E≥E3, the locking quantity of the suspended module action valve body unit is determined to be 0;

[0088] Wherein, 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.

[0089] In this embodiment, the fault energy after an arc fault occurs in the transformer is calculated using the following formula:

[0090] E=UIT;

[0091] Among them, E is the fault energy after the transformer has an arc fault, U is the arc voltage after the transformer has an arc fault, I is the arc current after the transformer has an arc fault, and T is the current duration after the transformer has an arc fault.

[0092] It can be seen that by selecting the locking number of the suspended module action valve body unit based on the relationship between the fault energy after the transformer arc fault occurs and each preset fault energy reference value, the locking number of the suspended module action valve body unit can be effectively adjusted according to the fault energy after the transformer arc fault occurs, so that different numbers of suspended module action valve body units can be controlled to open for different faults to achieve oil and gas discharge. Furthermore, when the fault energy after the transformer arc fault occurs is higher, the discharge demand is greater, and the locking number of the suspended module action valve body unit is less, so as to ensure the discharge sensitivity of the transformer.

[0093] In summary, the modular suspended combination pressure relief valve provided in the present embodiment forms a valve cavity by enclosing a valve seat and a valve shell, and forms a large-caliber pressure relief valve by array-combining modular suspended module action valve body units. The suspended module action valve body unit has a small area and is a suspended structure, so the opening speed is fast, the initial discharge curtain area increases rapidly, and the fluid discharged from each nozzle has little influence on each other, so the overall discharge resistance is small. The modular suspended combination pressure relief valve has the advantages of fast opening speed and fast initial discharge curtain area increase. Compared with the original linear opening pressure relief valve, it has a fast opening speed and a fast initial discharge area increase. The modular suspended combination pressure relief valve has little interference between discharge flow fields, a large discharge flow rate, and high space utilization. Compared with other suspended pressure relief valves, The open-type pressure relief valve can meet different installation aperture requirements through the combination of multiple pressure release unit modules. It has a simple and reliable structure and solves the problem that the existing linear open-type pressure relief valve has a reduced response speed as the aperture increases, making it difficult to meet the large-diameter discharge requirements on the converter transformer tank. Each pressure release action unit is independently designed and manufactured, and then the number of independent units used is determined according to different installation aperture requirements, and the corresponding valve seats and valve shells are adapted for installation, which greatly reduces development costs and shortens development cycles. At the same time, the modular single suspended open-type module action valve body unit has a simple and reliable structure and is also convenient for testing. For example, the opening pressure and sealing performance tests can be tested independently, and can also be maintained and replaced independently, which greatly reduces maintenance costs.

[0094] It should be noted that, in the description of the present invention, terms such as "up", "down", "left", "right", "inside" and "outside" indicating directions or positional relationships are based on the directions or positional relationships shown in the 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, be constructed and operated in a specific orientation. Therefore, it cannot be understood as a limitation on the present invention.

[0095] In addition, it should be noted that in the description of the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0096] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.

Claims

1. A modular suspended combination pressure relief valve, characterized in that: include: A valve seat, a valve housing and at least one pair of suspended modular action valve body units; wherein, The valve housing is arranged on the valve seat and encloses a valve cavity, each of the suspended modular action valve body units is placed in the valve cavity, two suspended modular action valve body units in each pair are arranged opposite to each other, and each pair of suspended modular action valve body units are arranged linearly on the valve seat in sequence along the length of the valve seat, and the suspended modular action valve body units are used to open under the action of oil and gas in the oil chamber to achieve the discharge of oil and gas; Determine the number of installation pairs of the modular suspended action valve body units based on the voltage level of the transformer on which the modular suspended combined pressure relief valve is installed; When determining the number of installation pairs of the suspended modular action valve body units based on the voltage level of the transformer on which the modular suspended combined pressure relief valve is installed: First, the voltage level ΔV of the transformer on which the modular suspended combined pressure relief valve is installed is obtained; Setting 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; Determine the installation pair number of the modular suspended combined pressure relief valve unit according to the relationship between the voltage level of the transformer installed in the modular suspended combined pressure relief valve and each of the preset voltage level reference values; The relationship between the voltage level of the transformer installed on the modular suspended combined pressure relief valve and each of the preset voltage level reference values ​​is used to determine the number of the suspended modular action valve body units, specifically: When ΔV<V1, the first preset valve pair P1 is selected as the installation pair number of the suspended module action valve body unit; When V1≤ΔV<V2, the second preset valve pair P2 is selected as the installation pair number of the suspended module action valve body unit; When V2≤ΔV<V3, the third preset valve pair P3 is selected as the installation pair number of the suspended module action valve body unit; When ΔV≥V3, the fourth preset valve pair P4 is selected as the installation pair number of the suspended modular action valve body unit.

2. The modular suspended combination pressure relief valve according to claim 1, characterized in that: Each of the suspended modular action valve body units comprises: A base is arranged on the valve seat, and a valve port is arranged on the base. A support frame is also arranged on the base, and the support frame is arranged between the valve port and a valve housing side plate adjacent to the base; The diaphragm disc is rotatably connected to the base, and the rotation axis of the diaphragm disc is placed between the valve port and the valve housing side plate adjacent to the base, so that the two diaphragms of the two suspended modular action valve body units in each pair are relatively opened; An elastic pressure mechanism, the two ends of which are rotatably connected to the diaphragm disc and the support frame, respectively, and are used to apply elastic pressure to the diaphragm disc so that the diaphragm disc can be sealed at the valve port to achieve sealing of the oil chamber; the pressure of the oil and gas in the oil chamber acting on the diaphragm disc forms an opening torque relative to the rotating shaft of the diaphragm disc, and the pressure of the elastic pressure mechanism acting on the diaphragm disc forms a resistance torque relative to the rotating shaft of the diaphragm disc; when the opening torque is greater than the resistance torque, the diaphragm disc rotates open from the sealing position at the valve port to discharge oil and gas; The action alarm mechanism is arranged on the support frame, is triggered when the membrane disc is opened and sends an action signal to perform a fault alarm.

3. The modular suspended combination pressure relief valve according to claim 2, characterized in that: The action alarm mechanism includes: a first signal trigger rod, a second signal trigger rod and a travel switch; wherein, One end of the first signal trigger rod is pressed against the top wall of the film disc, and the other end is rotatably connected to the support frame; The second signal trigger rod is arranged above the first signal trigger rod, and the second signal trigger rod is rotatably connected to the support frame. The travel switch is placed above the second signal trigger rod, and is used for, when the membrane disk is opened, the membrane disk drives the first signal trigger rod to rotate synchronously with the membrane disk, and pushes the second signal trigger rod to rotate, so as to trigger the contacts of the travel switch, so that the travel switch sends an action signal.

4. The modular suspended combination pressure relief valve according to claim 3 is characterized in that: A pushing protrusion is provided at the middle position of the first signal trigger rod, which is used to press and contact the bottom end of the second signal trigger rod, so that when the first signal trigger rod rotates synchronously with the membrane disk in the forward direction, the pushing protrusion pushes the second signal trigger rod to rotate.

5. The modular suspended combination pressure relief valve according to claim 3, characterized in that: The middle position of the second signal trigger rod is rotatably arranged on the support frame, and a variable diameter trigger arc plate is provided at the top end of the second signal trigger rod, and 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, and 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 the bottom of the travel switch to press the contact of the travel switch to realize the triggering of the travel switch.

6. The modular suspended combination pressure relief valve according to claim 3, characterized in that: The first signal trigger rod is connected to a first reset mechanism for applying 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 membrane disc is reset; and / or, The second signal trigger rod is connected to a second reset mechanism for applying a reset force to the second signal trigger rod so that the second signal trigger rod can be reset to a non-trigger position after the first signal trigger rod is reset.

7. The modular suspended combination pressure relief valve according to claim 2, characterized in that: The elastic pressure mechanism comprises: A lower support seat, which is rotatably connected to the membrane disc; A spring telescopic guide column, one end of which is connected to the lower support seat, and the other end of which is provided with a limit connecting plate, wherein the limit connecting plate is rotatably connected to the support frame; A force spring is sleeved on the outer circumference of the spring telescopic guide column, and the force spring is placed between the lower support seat and the limiting connecting plate, and is used for elastic compression when the membrane disc is opened, and applying force to the membrane disc so that the membrane disc can be reset to the sealing position.

8. The modular suspended combination pressure relief valve according to claim 2, characterized in that: A limit buffer mechanism is also provided inside the valve housing, which corresponds to the diaphragm disc one by one and is used 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.

9. The modular suspended combination pressure relief valve according to claim 8, characterized in that: The limit buffer mechanism comprises: An arc-shaped support plate, fixedly mounted on the valve housing; A plurality of disc springs are arranged at intervals on the arc-shaped support plate and are used for limiting and buffering the membrane disc when the membrane disc is opened into place.

10. The modular suspended combination pressure relief valve according to any one of claims 1 to 8, characterized in that: The valve housing is provided with an oil and gas outlet, and an open side plate is provided at the oil and gas outlet. The open side plate is used to open when the oil and gas in the oil chamber are discharged into the valve housing to discharge the oil and gas in the valve housing.

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