Anti-explosion fuel gas pressure regulating box

Abstract

The invention relates to the technical field of fuel gas pressure regulating equipment, and provides an anti-explosion fuel gas pressure regulating box which comprises a box body and a pressure regulator, and the pressure regulator is arranged in the box body and comprises an upper valve shell and a lower valve shell; the transverse diaphragm is arranged between the upper valve shell and the lower valve shell, a valve cavity is formed between the transverse diaphragm and the lower valve shell, the valve cavity is used for regulating pressure, an air discharging cavity is formed between the transverse diaphragm and the upper valve shell, and the air discharging cavity is used for releasing pressure of the valve cavity; the anti-explosion blocking layer is located in the deflation cavity and attached to the transverse diaphragm, and the periphery of the anti-explosion blocking layer is clamped between the upper valve shell and the lower valve shell. According to the technical scheme, the technical problem that the explosion-proof effect of the pressure regulator in the fuel gas pressure regulating box is poor in the prior art is solved. According to the explosion-proof fuel gas pressure regulating box, the probability of breakage of the transverse diaphragm is reduced, the situation that a large amount of fuel gas leaks due to breakage of the transverse diaphragm is effectively prevented, and the explosion-proof safety is improved.

Description

Technical Field

[0001] Embodiments of the present invention relate to the technical field of gas pressure regulating equipment, and specifically, to an explosion-proof gas pressure regulating box. Background Art

[0002] A gas pressure regulating box is a key device in the gas transmission and distribution system. Its main functions are to regulate the gas pressure, accurately control the relatively high input pressure to a stable pressure suitable for downstream equipment, ensure the stable supply of gas, and guarantee the normal operation of various gas-using equipment. At the same time, it can accurately control the gas flow according to different gas-using scenarios to meet diverse gas-using requirements. In terms of structure, it includes a pressure regulating unit that realizes pressure regulation through a pressure regulator; is equipped with safety protection devices such as an overpressure cut-off valve and a relief valve to ensure safety in case of abnormal pressure; has a filtering device for removing impurities in the gas; and an intelligent monitoring module for real-time collection and uploading of operation data. Its box generally has a certain protection ability to ensure the normal operation of internal equipment. In the prior art, gas pressure regulating boxes usually do not have explosion-proof functions. Although some related equipment has been improved in terms of explosion protection, usually only the structural strength of the outer shell has been enhanced, and true explosion protection cannot be achieved. Especially for the pressure regulator in the pressure regulating unit, its internal diaphragm, usually made of rubber, will rupture in the face of a strong explosion, resulting in further gas leakage and greater potential safety hazards. Summary of the Invention

[0003] To overcome the above defects, embodiments of the present invention provide an explosion-proof gas pressure regulating box, which solves the technical problem of poor explosion-proof effect of the pressure regulator in the gas pressure regulating box in related technologies.

[0004] According to one aspect, at least one embodiment of the present invention provides an explosion-proof gas pressure regulating box, including a box body and a pressure regulator. The pressure regulator is arranged in the box body and includes: an upper valve housing and a lower valve housing; a diaphragm, the diaphragm is arranged between the upper valve housing and the lower valve housing. A valve cavity is formed between the diaphragm and the lower valve housing, and the valve cavity is used for pressure regulation. A gas release cavity is formed between the diaphragm and the upper valve housing, and the gas release cavity is used for pressure relief of the valve cavity; an explosion-proof barrier layer, the explosion-proof barrier layer is located in the gas release cavity and is arranged in contact with the diaphragm, and is clamped around between the upper valve housing and the lower valve housing.

[0005] For example, in an explosion-proof gas pressure regulating box provided by at least one embodiment of the present invention, the explosion-proof barrier layer includes: a fixing plate, the fixing plate is clamped between the upper valve housing and the lower valve housing; Annular elastic pieces, there are several annular elastic pieces, and the sizes of the several annular elastic pieces gradually decrease and are connected in sequence. The outermost annular elastic piece is connected to the fixed plate, and the several annular elastic pieces can telescopically block the diaphragm.

[0006] For example, an explosion-proof gas pressure regulating box provided by at least one embodiment of the present invention, the inner wall of the fixed plate has an annular installation chute, the outer wall of the annular elastic piece has an annular insertion part, and the inner wall has an annular slot; the annular insertion part of the outermost annular elastic piece has a sliding stroke amount and is inserted into the annular installation chute, and the remaining annular elastic pieces are sequentially inserted with a sliding stroke amount through the annular insertion part and the annular slot.

[0007] For example, an explosion-proof gas pressure regulating box provided by at least one embodiment of the present invention, the annular insertion part has a notch, the notch is triangular, and is arranged in a plurality of circumferences.

[0008] For example, an explosion-proof gas pressure regulating box provided by at least one embodiment of the present invention, the notch of the annular slot has a retaining edge, and the retaining edge is used to block the annular insertion part from being pulled out.

[0009] For example, an explosion-proof gas pressure regulating box provided by at least one embodiment of the present invention, the pressure regulator further includes: One-way valve, the one-way valve is arranged on the diaphragm, and both ends are connected to the air release cavity and the valve cavity. The explosion-proof barrier layer has a central opening, and the one-way valve is located at the central opening.

[0010] For example, an explosion-proof gas pressure regulating box provided by at least one embodiment of the present invention, a sliding guide groove is further formed between the upper valve housing and the lower valve housing, the sliding guide groove is parallel to the axial direction of the fixed plate, and is arranged in a plurality of circumferences; the pressure regulator further includes: Sliding clip, the sliding clip is slidably arranged in the sliding guide groove, and the diaphragm and the fixed plate are clamped on the sliding clip; Shock-breaking piece, the shock-breaking piece is arranged on the upper valve housing and the lower valve housing, and the end part extends into the sliding guide groove, and the shock-breaking piece is used to limit and block the movement of the sliding clip.

[0011] For example, an explosion-proof gas pressure regulating box provided by at least one embodiment of the present invention, the shock-breaking pieces are arranged at intervals in sequence, and the arrangement direction is parallel to the axial direction of the fixed plate.

[0012] For example, an explosion-proof gas pressure regulating box provided by at least one embodiment of the present invention, the upper valve housing and the lower valve housing also have a shock-breaking space, the shock-breaking space is located on one side of the sliding guide groove, and both ends of the shock-breaking piece extend into the sliding guide groove and the shock-breaking space respectively.

[0013] For example, an explosion-proof gas pressure regulating box provided by at least one embodiment of the present invention, the pressure regulator further includes: A buffer spring, the buffer spring is arranged in the sliding guide groove, and one end acts on the sliding clip, and the other end acts on the bottom of the sliding guide groove, for pushing the sliding clip, and the buffer springs are arranged on both sides of the sliding clip.

[0014] The beneficial effects of the embodiments of the present invention are: In the present invention, through the design of the explosion-proof layer in the pressure regulator and the double-layer explosion-proof structure of the box body, the gas pressure regulating box can withstand a higher-intensity explosion impact. Under the same explosion intensity, compared with the traditional gas pressure regulating box, the probability of the rupture of the diaphragm in this explosion-proof gas pressure regulating box is reduced, effectively preventing a large amount of gas leakage due to the rupture of the diaphragm, and improving the explosion-proof safety BRIEF DESCRIPTION OF THE DRAWINGS In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following will briefly introduce the drawings required for the description of the embodiments of the present invention. Obviously, the drawings in the following description are only some exemplary embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained according to the content of the exemplary embodiments of the present invention and these drawings.

[0015] Figure 1 Schematic diagram of the external structure of the explosion-proof gas pressure regulating box in an embodiment of the present invention; Figure 2 For Figure 1 Schematic top view structure diagram of the explosion-proof gas pressure regulating box in the embodiment of Figure 3 For Figure 2 A-A cross-sectional structure diagram in Figure 4 For Figure 2 B-B cross-sectional structure diagram in Figure 5 For Figure 3 C partial enlarged structure diagram in Figure 6 For Figure 5 D partial enlarged structure diagram in Figure 7 For Figure 1 Schematic diagram of the external structure of the annular elastic sheet in the embodiment of Figure 8 For Figure 1 Schematic diagram of the internal structure of the annular elastic sheet in the embodiment of Figure 9 Schematic diagram of the shock-breaking part and shock-breaking space structure of the pressure regulator in another embodiment of the present invention; In the figure: housing - 100, voltage regulator - 200, upper valve housing - 210, lower valve housing - 220, diaphragm - 230, valve chamber - 231, air release chamber - 232, explosion - proof layer - 240, central port - 2401, fixed plate - 241, annular installation chute - 2411, annular elastic sheet - 242, annular insertion part - 2421, annular slot - 2422, notch - 2423, retaining edge - 2424, check valve - 250, sliding guide groove - 260, sliding clip - 270, buffer spring - 271, shock - shattering part - 280, shock - shattering space - 290. Detailed implementation mode

[0016] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It can be understood that the specific embodiments described herein are only used to explain the present invention, rather than limiting the present invention.

[0017] For the sake of simplicity of the drawings, only the parts related to the invention are schematically shown in each figure, and they do not represent the actual structure of the product. In addition, for the sake of simplicity and easy understanding of the drawings, in some figures, components with the same structure or function are only schematically shown for one of them, or only one of them is marked. In this article, "one" not only means "only this one", but also means "more than one" situation, and "several" includes "two" and "more than two".

[0018] In this article, it should be noted that unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" 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 mechanical connection or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0019] In the present invention, unless otherwise clearly specified and limited, the first feature being "above" or "below" the second feature may include the direct contact between the first and second features, or may include the situation where the first and second features are not in direct contact but in contact through other features between them. Moreover, the first feature being "above", "over" and "on" the second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the horizontal height of the first feature is higher than that of the second feature. The first feature being "below", "beneath" and "under" the second feature includes the first feature being directly below and obliquely below the second feature, or simply indicating that the horizontal height of the first feature is lower than that of the second feature.

[0020] In the description of this embodiment, the orientation or positional relationships such as "upper", "lower", "left", "right", etc. are based on the orientation or positional relationships shown in the drawings, and are only for the convenience of description and simplifying the operations, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present invention.

[0021] In addition, in the description of this application, the terms "first", "second", etc. are only used for distinguishing descriptions and cannot be construed as indicating or implying relative importance.

[0022] The gas pressure regulating box plays a crucial role in the gas transmission and distribution system. However, the existing gas pressure regulating boxes have deficiencies in explosion protection. In particular, the diaphragm made of rubber material in the pressure regulator is prone to rupture during an explosion, leading to greater safety hazards. This explosion-proof gas pressure regulating box aims to improve the explosion-proof ability of the pressure regulator and reduce the risk of gas leakage by setting an explosion-proof barrier in the gas release chamber of the pressure regulator, ensuring the safe and stable operation of the gas pressure regulating box in complex and dangerous environments. For the rest of the structures in the pressure regulator, the valve body, the outside of the pressure chamber, the diaphragm assembly (the rubber diaphragm is connected to the valve stem to convert the pressure signal into mechanical displacement), the adjusting spring (providing a pre-tightening force to set the outlet pressure value), the adjusting screw (adjusting the spring pre-tightening force by rotation), and the main valve core assembly (including the valve flap, valve seat, and valve stem) in the prior art are used to reduce the inlet pressure when the gas outlet pressure is too high and increase the inlet pressure when the outlet pressure is too low, which will not be elaborated here. The following specific embodiments will focus on introducing the relevant structures for explosion-proof improvement.

[0023] As Figures 1 to 8 shown, it shows the explosion-proof gas pressure regulating box in an embodiment of the present invention. Both the upper valve shell 210 and the lower valve shell 220 are made of high-strength explosion-proof metal materials, which can withstand a relatively high explosion impact pressure. The valve shell is manufactured using precision casting technology to ensure accurate internal structure dimensions and a smooth surface to reduce the gas flow resistance. At the same time, the inner and outer surfaces of the valve shell are treated with anti-corrosion, spraying a corrosion-resistant coating, such as epoxy zinc-rich primer plus polyurethane topcoat, to improve the corrosion resistance of the valve shell and extend its service life. The upper valve shell 210 and the lower valve shell 220 are tightly connected by high-strength bolts to ensure the connection strength. A sealing gasket is set at the connection surface, and the gasket is made of a rubber material resistant to gas corrosion, such as fluororubber, to ensure good sealing between the valve shells and prevent gas leakage.

[0024] The diaphragm 230 adopts a multi-layer composite structure to enhance its explosion-proof performance. The inner layer is a high-strength rubber layer, which provides basic elasticity and sealing performance. The rubber material is selected as hydrogenated nitrile rubber, which has good oil resistance, heat resistance and anti-aging performance; the middle layer is a metal reinforcement mesh, such as a stainless steel wire mesh, to increase the strength and tear resistance of the diaphragm; the outer layer is covered with another rubber protection layer to prevent the metal mesh from being corroded by direct contact with the gas. This multi-layer composite structure enables the diaphragm to maintain good pressure regulating function and resist explosion impact to a certain extent. The diaphragm 230 is installed between the upper valve housing 210 and the lower valve housing 220 and is sealed through a sealing groove and a sealant. The sealing groove has high machining precision to ensure the accurate position of the diaphragm after installation. The sealant is selected as an anaerobic sealant with good compatibility with the diaphragm material, which forms a firm sealing layer after curing to prevent gas leakage from the periphery of the diaphragm.

[0025] The explosion-proof barrier layer 240 can be made of aramid fiber composite material with high strength, impact resistance and good flexibility. Aramid fiber has an extremely high strength-to-weight ratio, and its strength is several times that of steel wire, which can effectively resist the impact force generated by the explosion. At the same time, the aramid fiber composite material also has good chemical corrosion resistance and high temperature resistance, and can adapt to the working environment inside the gas pressure regulating box. The shape of the explosion-proof barrier layer 240 matches that of the diaphragm 230, and it is a circular thin sheet structure. Its periphery is designed with a clamping structure, such as a clamping groove or a flanging, that matches the connection parts of the upper valve housing 210 and the lower valve housing 220 to ensure that it can be tightly clamped between the valve housings during installation. The explosion-proof barrier layer 240 is arranged in contact with the diaphragm 230, and when an explosion occurs, it can bear the impact force immediately to protect the diaphragm from being damaged.

[0026] The box body 100 adopts a double-layer explosion-proof structure. The outer layer is made of high-strength steel plate, which can withstand a certain intensity of explosion impact. The inner layer is an explosion-proof composite material, such as explosion-proof glass fiber reinforced plastic, which has good heat insulation, fire prevention and explosion-proof performance. A buffer layer is arranged between the two layers, filled with materials such as fireproof rock wool, which can not only further absorb the explosion energy, but also play a heat insulation role to prevent the internal heat from being transferred to the outside. The box body 100 is provided with an explosion-proof door, which is connected by high-strength hinges and can withstand a large impact force. A special sealing device, such as a rubber sealing strip and a pressing device, is installed on the door to ensure good sealing during normal operation and prevent gas leakage. At the same time, multiple ventilation openings are arranged on the box body 100, and fireproof and explosion-proof ventilation louvers are installed inside the ventilation openings to prevent external fire sources from entering the box and causing an explosion while ensuring ventilation and air exchange.

[0027] Gas enters the valve chamber 231 of the pressure regulator 200. The diaphragm 230 moves up and down according to the pressure change in the valve chamber 231. By working in coordination with the pressure regulating components in the valve chamber, the gas pressure is regulated to an appropriate value and then output to downstream equipment. During this process, the air release chamber 232 is in a relatively stable state, and the explosion-proof layer 240 fits closely with the diaphragm 230 without affecting the normal pressure regulating function.

[0028] When an explosion occurs, first, the double-layer explosion-proof structure of the box body 100 resists the external explosion impact, and the buffer layer absorbs part of the explosion energy. At the same time, the pressure generated by the explosion is transmitted to the inside of the pressure regulator 200, and the explosion-proof layer 240 bears the impact force first. Since it is made of high-strength aramid fiber composite material, it can effectively disperse and absorb the explosion energy, preventing the diaphragm 230 from being directly impacted too strongly and rupturing.

[0029] Through the design of the explosion-proof layer 240 inside the pressure regulator 200 and the double-layer explosion-proof structure of the box body 100, the gas pressure regulating box can withstand a higher-intensity explosion impact. Verified by simulated explosion tests, under the same explosion intensity, compared with traditional gas pressure regulating boxes, the probability of the diaphragm 230 rupturing inside this explosion-proof gas pressure regulating box is reduced, effectively preventing a large amount of gas from leaking due to the rupture of the diaphragm, and greatly improving the explosion-proof safety.

[0030] The optimized design of each component of the pressure regulator 200, including the high-strength connection of the upper valve housing 210 and the lower valve housing 220, the multi-layer composite structure of the diaphragm 230, and the overall explosion-proof design of the box body 100, enables the gas pressure regulating box to operate stably in complex and dangerous environments. It reduces the possibility of equipment damage caused by explosion impact or other abnormal conditions, extends the service life of the equipment, and reduces the maintenance cost.

[0031] The design of this explosion-proof gas pressure regulating box is applicable to a variety of gas transmission and distribution scenarios. Whether it is a city gas supply system or a gas pressure regulating station in an industrial plant area, it can effectively improve the explosion-proof safety performance. Its modular design concept is convenient for upgrading and transformation on the basis of existing gas pressure regulating boxes, and has good popularization and application value.

[0032] In some examples, such as Figure 6 shown, the fixing plate 241 is a ring structure, the inner diameter of which matches the inner diameter of the air release chamber 232 inside the pressure regulator, and the outer diameter is slightly smaller than the outer diameter of the connection surface of the upper valve housing 210 and the lower valve housing 220. The thickness of the fixing plate 241 is determined according to the overall structure of the pressure regulator and the pressure to be borne, which can ensure sufficient strength and will not affect the internal space layout of the pressure regulator due to being too thick.

[0033] During installation, the fixing plate 241 is clamped between the upper valve housing 210 and the lower valve housing 220 on which the diaphragm 230 has been installed. The connecting surfaces of the upper valve housing 210 and the lower valve housing 220 are designed with annular grooves adapted to the fixing plate 241. The fixing plate 241 is embedded in the grooves, and the upper valve housing 210 and the lower valve housing 220 are firmly connected by high-strength bolts, thereby firmly clamping the fixing plate 241 in the middle to ensure that it will not be displaced during the operation of the pressure regulator.

[0034] The annular elastic sheet 242 is made of a material with high elasticity and high strength. It requires a high elastic modulus, can quickly return to its original state after withstanding an impact, and has good corrosion resistance, making it suitable for use in the internal environment of the gas pressure regulating box. Through special heat treatment and surface treatment processes, the elasticity and strength of the annular elastic sheet 242 are further optimized, enabling it to better resist the impact force generated by an explosion.

[0035] Dimensions and connection: A plurality of annular elastic sheets 242 are provided, and their dimensions gradually decrease from the outside to the inside. The adjacent annular elastic sheets 242 are sequentially connected by flexible connectors. The outermost annular elastic sheet 242 is connected to the fixing plate 241. An appropriate gap is maintained between the adjacent annular elastic sheets 242, which can not only ensure that they will not interfere with each other during expansion and contraction, but also enable them to work together under an explosion impact, and can be pulled upward to form a conical-like structure, thereby jointly blocking the diaphragm 230 to achieve explosion protection, preventing the diaphragm 230 from being damaged by explosion, and thus avoiding gas leakage in the valve chamber 231.

[0036] Each annular elastic sheet 242 is a circular thin sheet structure, and its width is adjusted according to its position and the pressure it needs to bear. The outer edge and the inner edge of the annular elastic sheet 242 are both rounded to avoid scratching other components or being damaged itself during the expansion and contraction process. At the same time, in order to enhance the elasticity and deformation ability of the annular elastic sheet 242, a number of annular grooves are machined on its surface, and the depth and width of the grooves are optimized according to the size and material characteristics of the elastic sheet.

[0037] The explosion-proof barrier 240 is integrally arranged in contact with the diaphragm 230. The annular elastic sheets 242 can expand and contract with each other under an explosion impact, effectively blocking the diaphragm 230 and preventing it from rupturing due to excessive impact force. During normal pressure regulation, the presence of the annular elastic sheets 242 will not significantly hinder the normal movement of the diaphragm 230, and the diaphragm 230 can still move smoothly up and down according to the pressure change in the valve chamber 231 to achieve the normal pressure regulation function.

[0038] The fixing plate 241 is sandwiched between the upper and lower valve shells to ensure that the explosion-proof barrier layer 240 is tightly combined with the overall structure of the voltage regulator. The connection structure of the upper valve shell 210 and the lower valve shell 220 provides a stable installation foundation for the explosion-proof barrier layer 240. When an explosion occurs, the impact force borne by the explosion-proof barrier layer 240 can be evenly transmitted to the valve shell, thereby preventing the explosion-proof barrier layer 240 from being damaged due to excessive local force.

[0039] Normal operation: When the gas pressure regulating box is operating normally, the diaphragm 230 of the pressure regulator 200 moves up and down according to the change of the gas pressure in the valve cavity 231 to adjust the gas pressure. At this time, the annular spring piece 242 of the explosion-proof barrier 240 is in a natural state, lightly fitting with the diaphragm 230, without affecting the normal movement of the diaphragm 230, and the air release cavity 232 is also in a normal pressure balance state.

[0040] Explosion impact state: When an explosion occurs, the powerful impact force generated instantly acts on the explosion-proof barrier layer 240 first. The outermost annular spring fragments 242 bear the brunt of the impact. Due to their good elasticity and high strength, they can absorb and disperse part of the impact force. As the impact force is further transmitted, multiple annular spring fragments 242 adapt to pressure changes by expanding and contracting with each other according to the magnitude of the impact intensity, and work together to prevent the impact force from being transmitted to the diaphragm 230. The flexible connectors between the annular spring fragments 242 ensure that they remain connected during the expansion and contraction process and withstand the impact together. At the same time, the fixing plate 241 fixes the explosion-proof barrier layer 240 as a whole between the upper and lower valve shells to ensure that the explosion-proof barrier layer 240 will not shift when impacted, thereby effectively protecting the diaphragm 230, reducing the risk of its rupture, and preventing gas leakage.

[0041] The explosion-proof barrier layer 240 structure composed of the fixing plate 241 and the annular spring sheet 242 significantly enhances the protection of the diaphragm 230. In the simulated explosion test, compared with the case of using only a single-material explosion-proof barrier layer, the probability of rupture of the diaphragm 230 under the same explosion intensity is reduced, further improving the explosion-proof safety of the gas pressure regulating box and providing a more reliable guarantee for the stable operation of the gas system.

[0042] The design that the annular spring pieces 242 can be retracted and retracted enables the explosion-proof barrier 240 to better adapt to explosions of different intensities. Whether it is a small explosion wave or a strong explosion impact, the explosion-proof barrier 240 can effectively disperse and absorb the impact force through the expansion and contraction of the annular spring pieces 242, ensuring that the diaphragm 230 is always within a safe force range, thereby improving the adaptability of the explosion-proof barrier 240 to complex explosion conditions.

[0043] The design of the explosion-proof layer 240 can effectively prevent explosions without significantly affecting the normal pressure regulation function of the pressure regulator. During normal operation, the slight contact between the annular spring piece 242 and the diaphragm 230 does not hinder the movement of the diaphragm 230, and the diaphragm 230 can smoothly perform pressure regulation operations according to the pressure changes in the valve chamber 231, ensuring that the normal working performance of the gas pressure regulating box is not affected.

[0044] In some examples, such as Figures 5 to 8 shown, the connection structure between the components of the explosion-proof layer is further optimized. By providing an annular installation chute 2411 on the inner wall of the fixing plate 241, and designing an annular insertion portion 2421 and an annular slot 2422 on the annular spring piece 242, a sliding insertion with a sliding stroke amount is achieved between the annular spring pieces 242 and between them and the fixing plate 241, further optimizing the structure of the explosion-proof layer 240 to more effectively resist the explosion impact force and ensure the safe and stable operation of the gas pressure regulating box in a dangerous environment. The corresponding specific embodiments will be elaborated in detail below.

[0045] The fixing plate 241, as the component connecting the explosion-proof layer 240 and the valve housing of the pressure regulator, has an annular installation chute 2411 machined on its inner wall. The cross-sectional shape of the annular installation chute 2411 is rectangular, which not only ensures the stable insertion of the annular insertion portion 2421 of the annular spring piece 242 but also provides a certain sliding space for it, ensuring that the annular spring piece 242 can smoothly perform telescopic movement under explosion impact.

[0046] The design of the annular insertion portion 2421 and the annular slot 2422: An annular insertion portion 2421 is provided on the outer wall of each annular spring piece 242, and an annular slot 2422 is provided on the inner wall. The size of the annular insertion portion 2421 is adapted to the annular installation chute 2411 to ensure that it can be inserted into the annular installation chute 2411 with a sliding stroke amount. The size of the annular slot 2422 corresponds to that of the annular insertion portion 2421 so that adjacent annular spring pieces 242 can be inserted into each other with a sliding stroke amount in sequence. The edges of the annular insertion portion 2421 and the annular slot 2422 can be chamfered to prevent scratching other components or being damaged during the insertion and sliding processes.

[0047] The annular spring piece 242 is assembled with the fixing plate 241. During the assembly process, the annular insertion portion 2421 of the outermost annular spring piece 242 is inserted into the annular installation chute 2411 on the inner wall of the fixing plate 241 in a way that allows for a sliding stroke amount. After insertion, the annular spring piece 242 can slide circumferentially to a certain extent within the chute, which provides space for the telescopic deformation of the annular spring piece 242 when an explosion impact occurs. At the same time, an appropriate amount of high-temperature resistant lubricating grease can be applied between the annular insertion portion 2421 and the annular installation chute 2411 to further reduce the sliding friction force and ensure the smooth sliding of the annular spring piece 242 within the chute.

[0048] The remaining annular elastic pieces 242 are inserted in sequence according to the order of increasing size, with a sliding stroke amount through the annular insertion part 2421 and the annular slot 2422. During the insertion process, ensure that the gaps between adjacent annular elastic pieces 242 are uniform, so as to ensure that they do not interfere with each other during expansion and contraction, and can cooperate with each other under explosion shock. After the annular insertion part 2421 of each annular elastic piece 242 is inserted into the annular slot 2422 of the adjacent inner annular elastic piece 242, it can also slide to a certain extent in the slot, so that when the entire combination of annular elastic pieces 242 is subjected to explosion impact force, it can more effectively disperse and absorb energy through the relative sliding and expansion and contraction between the elastic pieces. It should be noted that the sliding of the annular elastic piece 242 on another annular elastic piece 242 is not a lateral sliding, and lateral sliding cannot be carried out. Specifically, it slides obliquely upward towards the central axis. Several annular elastic pieces 242 extend into a structure similar to a cone to buffer the explosion, block the diaphragm 230, and prevent the diaphragm 230 from being damaged by explosion, thus achieving explosion protection.

[0049] After assembly, the entire explosion-proof layer 240 is arranged in contact with the diaphragm 230. During the normal pressure regulation process, the slight elastic contact of the annular elastic piece 242 will not hinder the normal movement of the diaphragm 230. The diaphragm 230 can move up and down smoothly according to the change of the gas pressure in the valve cavity 231, realizing the precise regulation of the gas pressure. When an explosion occurs, the explosion-proof layer 240 can respond quickly. Through the expansion and contraction and sliding of the annular elastic piece 242, it can effectively block the impact force from being transmitted to the diaphragm 230, protect the diaphragm 230 from being damaged, and prevent gas leakage.

[0050] The fixing plate 241 is clamped between the upper valve housing 210 and the lower valve housing 220 of the pressure regulator. Through the clamping force of the upper valve housing 210 and the lower valve housing 220, ensure that the explosion-proof layer 240 is tightly combined with the overall structure of the pressure regulator. Under explosion shock, the impact force borne by the explosion-proof layer 240 can be evenly transmitted to the upper valve housing 210 and the lower valve housing 220 through the fixing plate 241, avoiding damage to the explosion-proof layer 240 due to excessive local stress. At the same time, the high-strength structure of the pressure regulator valve housing also provides a stable support for the explosion-proof layer 240, ensuring that the explosion-proof layer 240 can maintain its structural integrity during the explosion process and continuously play the role of explosion protection.

[0051] When the gas pressure regulating box is operating normally, the diaphragm 230 in the pressure regulator 200 moves up and down according to the fluctuation of the gas pressure in the valve cavity 231 to realize the regulation of the gas pressure. At this time, the annular elastic pieces 242 of the explosion-proof layer 240 are in a natural state, gently fitting with the diaphragm 230. The sliding connections between the annular elastic pieces 242 and between the annular elastic pieces 242 and the fixing plate 241 are in a relatively static state, which does not affect the normal operation of the diaphragm 230, and the air release cavity 232 also maintains normal pressure balance.

[0052] Once an explosion occurs, the strong impact force generated instantly will first act on the explosion-proof barrier layer 240. The outermost annular spring piece 242 is the first to be hit. Due to its sliding connection with the fixed plate 241 through the annular mounting groove 2411 and the annular insert 2421, it can slide and expand to a certain extent along the groove under the action of the impact force, thereby absorbing and dispersing part of the impact force. As the impact force is further transmitted, the internal annular spring piece 242 is sequentially expanded and slid through the sliding plug-in structure between the annular insert 2421 and the annular slot 2422. Each annular spring piece 242 works together to disperse and absorb the impact force within the entire explosion-proof barrier layer 240. This plug-in structure with a sliding stroke allows the explosion-proof barrier layer 240 to better adapt to the changes in the direction and intensity of the explosion impact force, effectively blocking the impact force from being transmitted to the diaphragm 230, thereby reducing the risk of rupture of the diaphragm 230 and ensuring the safe operation of the gas pressure regulating box.

[0053] Through the design of the annular mounting groove 2411 of the fixing plate 241 and the annular insert 2421 and the annular slot 2422 of the annular spring piece 242, the explosion-proof capability of the explosion-proof barrier layer 240 is significantly improved, the explosion-proof safety of the gas pressure regulating box is enhanced, and a more reliable guarantee is provided for the stable operation of the gas transmission and distribution system.

[0054] The sliding plug-in structure between the annular spring pieces 242 and between the annular spring pieces 242 and the fixing plate 241 enables the explosion-proof barrier layer 240 to more flexibly adapt to changes in the explosive impact force. Whether it is an instantaneous high-intensity impact or a continuous wave impact, the explosion-proof barrier layer 240 can effectively disperse and absorb energy through the sliding and expansion of the annular spring pieces 242, ensuring that the diaphragm 230 is always within a safe force range, thereby improving the adaptability of the explosion-proof barrier layer 240 to various complex explosion conditions.

[0055] The design of the explosion-proof barrier 240 not only enhances the explosion-proof performance, but also fully considers the impact on the normal pressure regulating function of the pressure regulator. During normal operation, the gentle contact between the annular spring pieces 242 and the diaphragm 230 and the sliding connection between the annular spring pieces 242 will not significantly hinder the movement of the diaphragm 230. The diaphragm 230 can accurately perform pressure regulation operations according to the pressure changes in the valve cavity 231, ensuring that the normal working performance of the gas pressure regulating box is not affected.

[0056] In some examples, such as Figures 7 to 8 As shown, a notch 2423 is designed on the annular insert 2421, and the notch 2423 is designed to be triangular, which can effectively improve the deformation flexibility of the annular spring 242 when subjected to force while ensuring structural strength. The vertex angle of the triangular notch is optimized and set between 30° and 60°.

[0057] Several triangular notches 2423 are evenly arranged along the circumferential direction of the annular insert 2421. The spacing between adjacent notches 2423 is equal, and they are reasonably distributed according to the circumference of the annular insert 2421 and the number of notches. The even circumferential arrangement ensures that the annular shrapnel 242 is deformed in all directions in a consistent manner when subjected to the impact force of an explosion, thereby more effectively dispersing the impact force.

[0058] When an explosion occurs, the annular shrapnel 242 will be subjected to impact forces from different directions. The presence of the triangular notch 2423 enables the annular insert 2421 to produce local deformation at the notch when subjected to force. These deformed areas can absorb and disperse the impact force to avoid stress concentration at a certain point or a certain area. For example, when the impact force acts on one side of the annular shrapnel 242, the notch 2423 on the annular insert 2421 on that side will first undergo elastic deformation, converting the impact force into elastic potential energy and storing it, and then dispersing the energy to other parts through the overall deformation of the annular shrapnel 242.

[0059] Since the notches 2423 are evenly arranged along the circumference, when a certain area is subjected to a large impact force, the deformation of the notches 2423 can drive the annular spring pieces 242 in the adjacent area to move in coordination. This coordinated movement enables the entire annular spring piece 242 combination to more effectively cope with complex and changeable explosion impact forces, thereby improving the overall explosion-proof performance of the explosion-proof barrier 240. For example, when a certain annular spring piece 242 is subjected to an oblique impact force, the notch 2423 on its annular insert 2421 is deformed, and this deformation is transmitted to other annular spring pieces 242 through the connection between the annular insert 2421 and the annular slot 2422 between adjacent annular spring pieces 242, prompting them to adjust their positions and shapes together to better disperse the impact force.

[0060] By providing triangular notches 2423 on the annular insert 2421 and arranging them evenly around the circumference, the deformation capacity and energy dispersion efficiency of the explosion-proof barrier 240 under explosion impact are greatly improved. The probability of rupture of the diaphragm 230 under the same explosion intensity is reduced, further enhancing the explosion-proof safety of the gas pressure regulating box.

[0061] The notch 2423 allows the annular spring piece 242 to deform and move more flexibly under the impact force in different directions, thereby improving the adaptability of the explosion-proof barrier layer 240 to complex explosion conditions. Whether it is a strong impact in a single direction or a composite impact in multiple directions, the explosion-proof barrier layer 240 can more effectively protect the diaphragm 230.

[0062] Although the notch 2423 is provided, the structural strength of the annular insertion part 2421 is not significantly affected, and the structural stability and explosion-proof performance of the explosion-proof layer 240 will not be reduced due to the existence of the notch 2423, ensuring the long-term reliable operation of the gas pressure regulating box.

[0063] In some examples, such as Figure 8 shown, the retaining edge 2424 is arranged around the notch of the annular slot 2422 in a continuous annular shape, which is used to effectively block the annular insertion part 2421 from being pulled out, and will not cause too much hindrance to the normal sliding of the annular insertion part 2421 in the annular slot 2422. Ensure that it has sufficient strength to withstand the outward pulling force that the annular insertion part 2421 may generate under the explosion shock.

[0064] The retaining edge 2424 and the annular slot 2422 adopt an integrated manufacturing process, and the connection between the retaining edge 2424 and the annular slot 2422 can be chamfered to reduce stress concentration and improve the reliability of the structure.

[0065] During the normal operation of the gas pressure regulating box, the annular insertion part 2421 between the annular elastic pieces 242 slides relatively smoothly in the annular slot 2422, and the retaining edge 2424 hardly affects the normal sliding of the annular insertion part 2421. Since the height of the retaining edge 2424 is relatively low, the annular insertion part 2421 only needs to overcome a small amount of frictional force when sliding in the slot, and this part of the frictional force will not have an obvious impact on the normal pressure regulating function of the pressure regulator and the stability of the explosion-proof layer 240 in the normal state.

[0066] When an explosion occurs, the annular elastic pieces 242 will be subjected to a strong impact force, and the annular insertion part 2421 may tend to be pulled out due to the impact force. At this time, the retaining edge 2424 can effectively block the annular insertion part 2421 from being disengaged from the annular slot 2422. Even under extreme explosion shocks, the retaining edge 2424, relying on its high-strength connection with the annular slot 2422 and its own structural strength, tightly holds the annular insertion part 2421, ensuring that the connection between the annular elastic pieces 242 will not fail, thereby maintaining the overall structural integrity of the explosion-proof layer 240 and ensuring that it can continuously and effectively resist the explosion impact force and protect the diaphragm 230 from being damaged.

[0067] The provision of the retaining edge 2424 effectively prevents the annular insertion part 2421 from being pulled out of the annular slot 2422 under explosion shock, greatly enhancing the stability of the connection between the annular elastic pieces 242 inside the explosion-proof layer 240. Due to the improved structural stability of the explosion-proof layer 240, it can more reliably protect the diaphragm 230 under explosion shock. In practical applications, this means that when the gas pressure regulating box faces the risk of explosion, the risk of gas leakage caused by the rupture of the diaphragm 230 is significantly reduced, further enhancing the explosion-proof reliability of the gas pressure regulating box and providing more powerful guarantee for the safe operation of the gas transmission and distribution system. The design of the retaining edge 2424 has almost no influence on the sliding of the annular elastic piece 242 during normal operation and the normal pressure regulating function of the pressure regulator while effectively enhancing the explosion-proof performance.

[0068] In some examples, such as Figure 5 shown, the one-way valve 250 is arranged on the diaphragm 230 and is connected to the air release cavity 232 and the valve cavity 231 at both ends to ensure that the gas can be depressurized unidirectionally.

[0069] The central port 2401 of the explosion-proof layer 240 is located at the center of the explosion-proof layer 240 and is circular in shape. Its diameter is slightly larger than the outer diameter of the one-way valve 250 to ensure that the one-way valve 250 can be smoothly installed at the central port 2401, and there is a certain gap between the one-way valve 250 and the central port 2401 to avoid mutual interference between the two.

[0070] During the normal operation of the gas pressure regulating box, the pressure regulator 200 adjusts the gas pressure in the valve cavity 231 according to the downstream gas demand. The design of the one-way valve 250 can relieve pressure and exhaust gas when the pressure in the valve cavity 231 is too high to avoid accidents.

[0071] Explosion-proof process: When an explosion occurs, the explosion-proof layer 240 first bears the explosion impact force from the air release cavity 232 to protect the diaphragm 230 from being damaged. Since the one-way valve 250 is located at the central port 2401, the explosion-proof layer 240 can disperse and buffer the impact force acting on the one-way valve 250 to a certain extent, reducing the risk of damage to the one-way valve 250. Even in extreme cases, if the diaphragm 230 is damaged by chance, the one-way valve 250 can prevent a large amount of gas from leaking from the valve cavity 231 to the air release cavity 232, further preventing greater safety hazards caused by gas leakage.

[0072] The provision of the one-way valve 250 enables the pressure regulator 200 to more precisely control the flow of gas between the valve cavity 231 and the air release cavity 232 during the process of adjusting the gas pressure, effectively avoiding the influence of pressure fluctuations on the performance of the pressure regulator and improving the stability and reliability of pressure regulation.

[0073] In some examples, such as Figure 9As shown, a sliding guide groove 260 is also formed between the upper valve housing 210 and the lower valve housing 220. The sliding guide groove 260 is in the shape of a rectangular groove, parallel to the axial direction of the fixing plate 241. A plurality of sliding guide grooves 260 are evenly arranged in the circumferential direction, and the number is determined according to the size and actual requirements of the pressure regulator 200, so as to ensure that the diaphragm 230 can be evenly supported and guided in all directions.

[0074] The sliding guide groove 260 is formed by precision machining after the upper valve housing 210 and the lower valve housing 220 are assembled. Half grooves are respectively machined at corresponding positions on the upper valve housing 210 and the lower valve housing 220. During assembly, the two half grooves are butted to form a complete sliding guide groove 260.

[0075] The sliding clamp 270 is integrally in the shape of a cuboid, and its length and width are adapted to the sliding guide groove 260 to ensure smooth sliding in the guide groove. A clamping groove for clamping the diaphragm 230 and the fixing plate 241 is provided on one side of the sliding clamp 270, and anti-slip lines are provided on the inner wall of the clamping groove to enhance the clamping force on the diaphragm 230.

[0076] The sliding clamp 270 is installed in the sliding guide groove 260 and can only slide in the axial direction through the constraint of the guide groove. During installation, first embed the edge of the diaphragm 230 into the clamping groove of the sliding clamp 270, and then insert the sliding clamp 270 together with the diaphragm 230 into the sliding guide groove 260.

[0077] The designed shock-breaking part 280 is made of materials such as ceramics or glass and has high brittleness. The shock-breaking part 280 is in the shape of a plate, one end is fixed on the upper valve housing 210 or the lower valve housing 220, and the other end extends into the sliding guide groove 260. The fixing method can be clamping to ensure the connection between the shock-breaking part 280 and the valve housing. The end of the shock-breaking part 280 extending into the sliding guide groove 260 is in a planar shape so that it is easier to break when subjected to a large impact force.

[0078] During the normal pressure regulation process, the movement of the sliding clamp 270 is restricted by the shock-breaking part 280, preventing the sliding clamp 270 from sliding and ensuring that the diaphragm 230 performs pressure regulation at a determined position. When an explosion occurs, the powerful impact force generated by the explosion is transmitted to the sliding clamp 270. The sliding clamp 270 moves rapidly under the action of the impact force and impacts the shock-breaking part 280. Due to the brittleness of the shock-breaking part 280, it will break after being impacted, thereby releasing the sliding clamp 270 and enabling it to move freely in the sliding guide groove 260, providing a certain buffer space for the diaphragm 230 and preventing the diaphragm 230 from rupturing due to an instantaneously excessive impact force.

[0079] When the gas pressure regulating box is operating normally, the pressure regulator 200 regulates the pressure according to the change of gas pressure. The diaphragm 230 moves under the action of the pressure difference between the valve chamber 231 and the air release chamber 232. The shock-breaking part 280 restricts the immobility of the sliding clamp part 270 to ensure that the diaphragm 230 determines the regulating pressure and realizes a stable pressure regulating function.

[0080] When an explosion occurs, the impact force generated by the explosion first acts on the upper valve housing 210, the lower valve housing 220 and the internal components. The sliding clamp part 270 moves rapidly towards the shock-breaking part 280 under the action of the impact force, hitting the shock-breaking part 280 and causing it to break. After the shock-breaking part 280 breaks, the sliding clamp part 270 is no longer restricted and can slide freely in the sliding guide groove 260, providing a buffer space for the diaphragm 230. At the same time, the explosion-proof layer 240 continues to bear the explosion impact force to protect the diaphragm 230. In this way, the risk of the diaphragm 230 rupturing during an explosion is reduced, and the explosion-proof performance of the gas pressure regulating box is improved. The explosion-proof layer 240 can be set on both the upper valve housing 210 and the lower valve housing 220, or can be adjusted to be designed on the explosion-proof layer 240, both of which can achieve good results.

[0081] In some examples, such as Figure 9 shown, the number of shock-breaking parts 280 can be designed to be multiple, which is determined according to the size of the pressure regulator 200 and the expected explosion intensity to be borne. For a pressure regulator 200 of general specifications, the number of shock-breaking parts 280 in each sliding guide groove 260 is set to 3 - 5. If the pressure regulator 200 is applied to a scenario with a higher explosion risk or more stringent explosion-proof requirements, the number can be appropriately increased to 5 - 7. Such a number setting can provide sufficient buffering and protection for the sliding clamp part 270 under different explosion conditions, ensuring the safety of the diaphragm 230 under explosion impact.

[0082] The shock-breaking parts 280 are arranged at intervals along the axial direction of the parallel fixing plate 241 in sequence. The interval distance between adjacent shock-breaking parts 280 is kept uniform, and the interval distance is usually set between 15 - 25 mm. This interval range can not only ensure that the shock-breaking parts 280 have enough space to play a role in the sliding guide groove 260, but also ensure that when an explosion occurs, the sliding clamp part 270 can hit the shock-breaking parts 280 in sequence during the movement process, gradually consuming the impact force and providing continuous and effective buffering for the diaphragm 230.

[0083] During the normal pressure regulation process, multiple shock-breaking components 280 jointly restrict the movement of the sliding clamping component 270 to ensure that the diaphragm 230 adjusts the pressure within an appropriate range. When an explosion occurs, the sliding clamping component 270 rapidly moves axially along the sliding guide groove 260 under the action of a strong impact force. Since the shock-breaking components 280 are arranged at intervals in sequence, the sliding clamping component 270 will first impact the shock-breaking component 280 located adjacent to it. This shock-breaking component 280 breaks after being impacted, releasing a part of the impact force and at the same time reducing the speed of the sliding clamping component 270. Subsequently, the sliding clamping component 270 continues to move and impacts the subsequent shock-breaking components 280 in sequence. Through this way of gradually impacting and breaking, the impact force generated by the explosion is gradually consumed, providing a more detailed and effective buffer for the diaphragm 230 and further reducing the risk of the diaphragm 230 rupturing due to excessive instantaneous impact force.

[0084] This layout of the shock-breaking components 280 arranged at intervals in sequence can better adapt to explosion impacts of different intensities. For a relatively weak explosion impact, the sliding clamping component 270 may only impact a few shock-breaking components 280. After these shock-breaking components 280 break, they can absorb the corresponding impact force to protect the diaphragm 230. For a stronger explosion impact, the sliding clamping component 270 will impact more shock-breaking components 280 in sequence. Through the continuous breaking of multiple shock-breaking components 280, the impact force is fully consumed to ensure that the diaphragm 230 can be effectively protected even in extreme explosion situations.

[0085] By optimizing the arrangement of the shock-breaking components 280, the step-by-step buffering mechanism of multiple shock-breaking components 280 can more effectively absorb the explosion impact force, provide more reliable protection for the diaphragm 230, and greatly improve the explosion-proof safety of the gas pressure regulating box.

[0086] The sequential and spaced arrangement of the shock-breaking components 280 enables the pressure regulator 200 to better cope with explosion impacts of different intensities and enhances the adaptability of the buffering system. Whether it is a slight explosion or a strong explosion, the impact force can be effectively consumed through the sequential breaking of the shock-breaking components 280, ensuring the safety of the diaphragm 230 and improving the reliability of the gas pressure regulating box under various explosion conditions.

[0087] During the normal pressure regulation process, multiple shock-breaking components 280 jointly restrict the sliding clamping component 270. Compared with a single shock-breaking component, it can more precisely control the movement range of the sliding clamping component 270, thereby further improving the stability of the pressure regulation process of the pressure regulator 200. This helps to maintain the stability of the output pressure of the gas pressure regulating box and meet the requirements of downstream gas-using equipment for the stability of gas pressure.

[0088] In some examples, such as Figure 9As shown, a shock-breaking space 290 can also be designed. The shock-breaking space 290 is arranged inside the upper valve housing 210 and the lower valve housing 220, and is located on one side of the sliding guide groove 260. The shock-breaking space 290 has a rectangular cavity structure, with its length being the same as that of the sliding guide groove 260, and the width being determined according to the internal space of the pressure regulator 200 and the size of the shock-breaking part 280, which not only provides sufficient space for the shock-breaking part 280 during fragmentation but also does not overly occupy the internal space of the pressure regulator 200 and affect the normal layout of other components.

[0089] The shock-breaking space 290 is mainly used to accommodate the fragments after the shock-breaking part 280 breaks, avoiding the accumulation of fragments in the sliding guide groove 260 and affecting the normal sliding of the sliding clamping part 270. At the same time, the shock-breaking space 290 can also buffer the impact force generated when the shock-breaking part 280 breaks to a certain extent, reducing the impact on other components of the pressure regulator 200.

[0090] Both ends of the shock-breaking part 280 extend into the sliding guide groove 260 and the shock-breaking space 290 respectively. The end of the shock-breaking part 280 extending into the sliding guide groove 260 is flat, which is used to break more easily when being impacted by the sliding clamping part 270. When an explosion occurs, the sliding clamping part 270 impacts the shock-breaking part 280 under the action of the impact force. After the shock-breaking part 280 breaks, the fragments will fly into the shock-breaking space 290. Some buffer structures, such as rubber pads or corrugated structures, can be arranged on the inner wall of the shock-breaking space 290 to buffer and block the flying fragments and prevent the fragments from rebounding back into the sliding guide groove 260. At the same time, the existence of the shock-breaking space 290 enables the shock-breaking part 280 to release energy more fully when breaking, further enhancing the protection of the sliding clamping part 270 and the diaphragm 230.

[0091] The setting of the shock-breaking space 290 does not weaken the structural strength of the upper valve housing 210 and the lower valve housing 220. On the contrary, through reasonable design, some reinforcing rib structures are added inside the valve housing, arranged around the shock-breaking space 290 and the sliding guide groove 260, enhancing the overall rigidity of the valve housing.

[0092] Considering that the shock-breaking part 280 may need to be replaced after withstanding multiple explosion impacts, the design of the shock-breaking space 290 makes the maintenance work more convenient. When the shock-breaking part 280 needs to be replaced, some detachable components on the valve housing, such as inspection covers or side plates, can be disassembled to conveniently inspect and replace the shock-breaking part 280. At the same time, the cleaning of the fragments in the shock-breaking space 290 is relatively easy. Just open the corresponding inspection port to clean out the fragments, improving the maintenance efficiency of the pressure regulator 200.

[0093] The cooperation between the shock-breaking space 290 and the shock-breaking part 280 further improves the explosion-proof performance of the pressure regulator 200. The effective accommodation and energy buffering of the broken fragments of the shock-breaking part 280 by the shock-breaking space 290 result in less damage to the sliding clamp 270 and the diaphragm 230 under the explosion impact, greatly enhancing the explosion-proof safety of the gas pressure regulating box.

[0094] The reinforcing rib structure arranged around the shock-breaking space 290 and the sliding guide groove 260 enhances the overall structural strength of the upper valve housing 210 and the lower valve housing 220. In practical applications, the pressure regulator 200 can better withstand the explosion impact and long-term pressure changes, reducing the possibility of valve housing deformation or damage, and improving the structural reliability and service life of the pressure regulator 200. The design of the shock-breaking space 290 facilitates the maintenance of the pressure regulator 200. Designed for modular replacement of the shock-breaking part 280, replacement and debris cleaning are more convenient. This enables the gas pressure regulating box to more timely maintain and inspect the explosion-proof components during long-term operation, ensuring that it always maintains good explosion-proof performance.

[0095] In some examples, such as Figure 9 shown, a buffer spring 271 can also be designed. The buffer spring 271 is within each sliding guide groove 260, and both ends of the buffer spring 271 act on the sliding clamp 270 and the bottom of the sliding guide groove 260 respectively. During specific installation, at the positions on the bottom of the sliding guide groove 260 corresponding to both sides of the sliding clamp 270, positioning grooves adapted to the outer diameter of the buffer spring 271 are machined, and the groove depth is slightly greater than the wire diameter of the spring to prevent it from shifting during operation.

[0096] The other end of the buffer spring 271 acts on the sliding clamp 270. On both sides of the sliding clamp 270, protrusion or hook structures matching the spring ends are provided to ensure that the spring can be firmly connected to the sliding clamp 270 and will not fall off during the telescoping process. In this way, the buffer spring 271 can stably provide a pushing force for the sliding clamp 270.

[0097] When an explosion occurs, the powerful impact force generated by the explosion causes the sliding clamp 270 to move rapidly within the sliding guide groove 260 and hit the shock-breaking part 280. During this process, the buffer spring 271 plays a dual buffering role. On the one hand, before the sliding clamp 270 hits the shock-breaking part 280, the buffer spring 271 can absorb part of the impact force through its own compression, slow down the moving speed of the sliding clamp 270, and reduce the impact force on the shock-breaking part 280. On the other hand, when the shock-breaking part 280 breaks, the buffer spring 271 can quickly rebound and provide a reverse thrust for the sliding clamp 270, restricting the movement of the sliding clamp 270 within the sliding guide groove 260, and avoiding the sliding clamp 270 from causing too much impact force on the diaphragm 230 due to excessive movement, further protecting the diaphragm 230 from being damaged.

[0098] The double buffering effect of the buffer spring 271 effectively reduces the impact force of the sliding clamp 270 on the shock-breaking part 280 and restricts the excessive movement of the sliding clamp 270, thus better protecting the diaphragm 230.

[0099] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit them. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present invention can be modified or equivalently replaced without departing from the spirit and scope of the technical solutions of the present invention, and they should all be covered by the scope of the claims of the present invention.

Claims

1. An explosion-proof gas pressure regulating box, characterized in that: It comprises a box body (100) and a voltage regulator (200), wherein the voltage regulator (200) is arranged in the box body (100) and comprises: An upper valve housing (210) and a lower valve housing (220); a diaphragm (230), the diaphragm (230) being arranged between the upper valve housing (210) and the lower valve housing (220), a valve cavity (231) being formed between the diaphragm (230) and the lower valve housing (220), the valve cavity (231) being used for pressure regulation, and a deflation cavity (232) being formed between the diaphragm (230) and the upper valve housing (210), the deflation cavity (232) being used for relieving pressure in the valve cavity (231); An explosion-proof barrier layer (240) is located in the air release cavity (232) and is disposed in close contact with the diaphragm (230), with its periphery clamped between the upper valve shell (210) and the lower valve shell (220).

2. The explosion-proof gas pressure regulating box according to claim 1, characterized in that: The explosion-proof barrier layer (240) comprises: a fixing plate (241), the fixing plate (241) being sandwiched between the upper valve housing (210) and the lower valve housing (220); An annular spring sheet (242), wherein there are a plurality of annular spring sheets (242), and the sizes of the plurality of annular spring sheets (242) gradually decrease and are connected in sequence, the annular spring sheet (242) at the outermost end is connected to the fixing plate (241), and the plurality of annular spring sheets (242) can be mutually extended and retracted to block the diaphragm (230).

3. The explosion-proof gas pressure regulating box according to claim 2, characterized in that: The inner wall of the fixing plate (241) has an annular mounting groove (2411), the outer wall of the annular spring sheet (242) has an annular inserting portion (2421), and the inner wall has an annular slot (2422); the annular inserting portion (2421) of the outermost annular spring sheet (242) has a sliding stroke amount and is inserted into the annular mounting groove (2411), and the remaining annular spring sheets (242) are sequentially plugged in with a sliding stroke amount through the annular inserting portion (2421) and the annular slot (2422).

4. The explosion-proof gas pressure regulating box according to claim 3, characterized in that: The annular insert (2421) has a notch (2423), and the notch (2423) is triangular and arranged in a plurality of circles.

5. The explosion-proof gas pressure regulating box according to claim 3, characterized in that: The notch of the annular slot (2422) is provided with a blocking edge (2424), and the blocking edge (2424) is used to prevent the annular inserting portion (2421) from being pulled out.

6. The explosion-proof gas pressure regulating box according to claim 1, characterized in that: The voltage regulator (200) further comprises: A one-way valve (250) is provided on the diaphragm (230), and two ends of the one-way valve are connected to the air release cavity (232) and the valve cavity (231); the explosion-proof barrier layer (240) has a central opening (2401), and the one-way valve (250) is located at the central opening (2401).

7. The explosion-proof gas pressure regulating box according to claim 2, characterized in that: A sliding guide groove (260) is further formed between the upper valve housing (210) and the lower valve housing (220), wherein the sliding guide groove (260) is parallel to the axial direction of the fixing plate (241) and is arranged in a plurality of circles; the pressure regulator (200) further comprises: a sliding clamp (270), wherein the sliding clamp (270) is slidably disposed in the sliding guide groove (260), and the diaphragm (230) and the fixing plate (241) are clamped on the sliding clamp (270); A shattering piece (280), wherein the shattering piece (280) is arranged on the upper valve housing (210) and the lower valve housing (220), and an end portion thereof extends into the sliding guide groove (260), and the shattering piece (280) is used to limit and block the movement of the sliding clamp (270).

8. The explosion-proof gas pressure regulating box according to claim 7, characterized in that: The shattering pieces (280) are a plurality of pieces arranged in sequence and at intervals, and the arrangement direction is parallel to the axial direction of the fixing plate (241).

9. The explosion-proof gas pressure regulating box according to claim 8, characterized in that: The upper valve housing (210) and the lower valve housing (220) further have a shattering space (290), the shattering space (290) being located on one side of the sliding guide groove (260), and two ends of the shattering member (280) respectively extending into the sliding guide groove (260) and the shattering space (290).

10. The explosion-proof gas pressure regulating box according to claim 9, characterized in that: The voltage regulator (200) further comprises: A buffer spring (271), wherein the buffer spring (271) is arranged in the sliding guide groove (260), and one end of the buffer spring acts on the sliding clamp (270), and the other end acts on the bottom of the sliding guide groove (260) to push up the sliding clamp (270), and the buffer spring (271) is arranged on both sides of the sliding clamp (270).

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