Corrosion-resistant and impact-resistant civil defense protection valve

Abstract

The utility model discloses a kind of corrosion-resistant and impact-resistant civil air defense protection valve, it is related to valve technical field, including the valve body of being treated with anti-corrosion and being impact-resistant, the connecting flange is equipped at the both ends of valve body, connecting flange is connected with pipeline butt flange by bolt, the adjusting hand wheel is equipped at the top end of valve body;It further includes multiple guide shafts and one-to-one corresponding guide ring, connecting flange is equipped with mounting hole, butt flange is equipped with the auxiliary hole of adaptation, guide ring is installed in mounting hole and auxiliary hole by positioning assembly, guide shaft is closely slid and arranged in corresponding guide ring, connecting flange side guide ring is equipped with locking assembly locking guide shaft.The utility model is constrained by the cooperation of guide shaft and guide ring relative motion flange, greatly reduce the misregistration sliding probability of flange under strong impact, avoid sealing washer damage, guarantee sealing performance, while guide ring is installed firmly, guide shaft locking is reliable, structure is stable and dismounting is convenient, significantly improve the use reliability and security of civil air defense protection valve under extreme working condition.

Description

Technical Field

[0001] This utility model relates to the technical field of valves, and in particular to a corrosion-resistant and impact-resistant civil defense protection valve. Background Technology

[0002] Civil defense protective valves are core protective components in the piping systems of civil defense projects. They are mainly used in various civil defense projects such as air-raid shelters, underground command posts, and civil defense material warehouses. Their core function is to resist shock waves, the infiltration of toxic and harmful gases, and external environmental corrosion under extreme conditions such as war and earthquakes, ensuring the sealing and structural integrity of the piping system, thereby protecting the safety of personnel and the normal operation of equipment inside the civil defense project. These valves must simultaneously meet the core performance requirements of corrosion resistance and impact resistance to adapt to the complex and harsh operating environment of civil defense projects (such as underground humid environments, contact with corrosive media, and instantaneous impact loads).

[0003] To achieve corrosion resistance, existing technologies mainly employ the following technical measures: First, corrosion-resistant materials are selected for manufacturing core components such as valve bodies and valve discs, for example, stainless steel such as 304 or 316L, or corrosion-resistant alloys such as copper alloys or titanium alloys, relying on the chemical stability of the materials themselves to resist corrosion; second, anti-corrosion treatment is applied to the surface of ordinary carbon steel and other substrates, such as spraying epoxy resin, polytetrafluoroethylene (PTFE) and other anti-corrosion coatings, or using metal plating processes such as zinc plating or chromium plating, to isolate the substrate from contact with corrosive media; third, the selection of sealing materials is optimized, using corrosion-resistant elastic materials such as fluororubber and EPDM rubber to prevent sealing failure due to corrosion.

[0004] To improve impact resistance, existing technologies typically employ the following measures: increasing the wall thickness of the valve body, valve cover, and flanges to enhance structural rigidity and resist impact loads; designing an integrated valve body structure to reduce weak points caused by splicing gaps; using high-strength bolts to connect flanges, increasing the number of bolts or using high-strength bolts (such as grade 8.8 or 10.9) to improve connection tightness; and installing a buffer structure (such as an elastic washer or buffer bushing) between the valve disc and valve seat to mitigate the instantaneous impact force during impact.

[0005] However, existing technologies still have significant shortcomings: the connection between the flanges at both ends of the valve and the pipeline flanges remains the weakest link in the entire valve system's impact resistance. Despite the use of high-strength bolts and an increased number of bolts, relative misalignment or sliding can easily occur between the two flanges when subjected to significant impact loads (such as shock waves during wartime or structural displacement caused by strong earthquakes). This relative displacement severely compromises the sealing performance between the flange faces, leading to media leakage and failing to meet the sealing protection requirements of civil defense projects. Furthermore, misalignment and sliding exert additional shearing and compressive forces on the sealing gaskets between the flanges, significantly increasing the probability of gasket damage, further exacerbating the leakage risk, and ultimately causing the protective function of the civil defense valve to fail, thus compromising the safe operation of the civil defense project. Utility Model Content

[0006] To solve the above-mentioned technical problems, this utility model provides a corrosion-resistant and impact-resistant civil defense protection valve that can greatly reduce the probability of significant misalignment and slippage at the connection between the valve flange and the pipeline flange after the valve is subjected to strong impact, avoid the occurrence of sealing gasket failure or ineffectiveness, and thus enhance reliability.

[0007] This utility model discloses a corrosion-resistant and impact-resistant civil defense protection valve, comprising a valve body with anti-corrosion treatment and impact resistance, connecting flanges at both ends of the valve body, and several through holes evenly distributed through the edge of the flat sidewall of the connecting flanges. The connecting flanges are connected to the pipe flange by several bolts adapted to the through holes. An adjusting handwheel is provided at the top middle part of the valve body, and the valve body also includes:

[0008] The guide shaft is provided in multiple configurations. Multiple mounting holes are evenly distributed and penetrate the edge of the plane sidewall of the valve's connecting flange. The connecting flange of the pipe corresponding to the connecting flange is provided with auxiliary holes. The position and number of auxiliary holes are adapted to the position and number of mounting holes.

[0009] Guide rings are provided in a one-to-one correspondence with guide shafts. A guide ring is installed in each of the multiple mounting holes of the connecting flange and the multiple auxiliary holes of the mating flange. The guide rings are installed in the corresponding mounting holes or auxiliary holes by positioning components. One end of the guide shaft is tightly slidably inserted into the corresponding guide ring on the connecting flange side, and the other end is tightly slidably inserted into and passes through the corresponding guide ring on the mating flange side. The end of the guide ring on the connecting flange side located inside the valve is provided with a locking component, which locks the guide shaft in the guide ring on the connecting flange side.

[0010] Furthermore, the positioning component includes a retaining ring and a locking threaded ring. Each guide ring has an external thread on one side of its outer wall, and a retaining ring is fixedly fitted on its other end. The locking component is located on the retaining ring side, and the external thread side of the guide ring is threadedly connected to the locking threaded ring. The locking threaded ring and the retaining ring cooperate to lock the guide ring onto the corresponding connecting flange or mating flange.

[0011] Furthermore, the locking assembly includes a bolt, and the circumferential sidewall of the retaining ring of the guide ring is provided with a pin hole, the center hole of the retaining ring is connected to the middle of the pin hole, the circumferential sidewall of the guide shaft located in the guide ring on the connecting flange side is provided with a through hole, the bolt is inserted into the pin hole from one side of the pin hole, and then passes through the through hole of the guide shaft and extends out from the other side of the pin hole, and the bolt is locked on the retaining ring of the guide ring by a nut.

[0012] Furthermore, a conical surface is provided between the circumferential sidewall of the retaining ring and the circumferential sidewall of the guide ring, and a conical surface is also provided on the side of the circumferential sidewall of the locking threaded ring near the retaining ring.

[0013] Furthermore, the outer circumferential sidewall of the locking threaded ring, away from the retaining ring, is configured as a hexagonal surface.

[0014] Furthermore, both ends of the mounting hole of the connecting flange and both ends of the auxiliary hole of the mating flange are set as conical surfaces that expand from the inside out. The conical surfaces on both sides of the mounting hole or auxiliary hole are adapted to the arc angle of the conical surface on the retaining ring side and the conical surface of the locking threaded ring.

[0015] Furthermore, an anti-loosening washer is provided between the nut and the retaining ring of the locking assembly.

[0016] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0017] 1. Significantly improves the impact resistance and anti-misalignment capability of flange connections. By coordinating the guide shaft and guide ring, the relative movement of the connecting flange and the mating flange is constrained, greatly reducing the probability of misalignment and slippage under strong impact, and ensuring the sealing integrity of the pipeline system.

[0018] 2. Effectively protects the sealing gasket, avoids damage to the sealing gasket caused by shearing and extrusion forces due to flange misalignment, extends the service life of sealing components, reduces the risk of media leakage, and meets the stringent sealing protection requirements of civil defense projects.

[0019] 3. Easy to install and disassemble. The guide ring is quickly fixed to the mounting hole and auxiliary hole through the positioning component. The guide shaft adopts a plug-in fit and is locked by the locking component. Assembly can be completed without complicated tools, improving construction efficiency.

[0020] 4. The structure is highly stable, with all components fitting tightly. The matching design of the conical surfaces enhances the fit between the guide ring and the flange. The double fixing of the locking threaded ring and the retaining ring further improves the structural load-bearing capacity, taking into account both corrosion resistance and impact resistance.

[0021] 5. Wide adaptability: the position and number of mounting holes and auxiliary holes can be adjusted according to actual needs. The matching structure of the guide shaft and guide ring does not affect the original anti-corrosion and impact resistance performance of the valve, and it is suitable for various civil defense engineering pipeline systems. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the structure of this utility model;

[0023] Figure 2 This is a schematic diagram of the connection structure between the guide ring and the locking threaded ring of this utility model;

[0024] Figure 3 This is the utility model Figure 1 A magnified schematic diagram of the structure of part A in the diagram;

[0025] Figure 4 This is the utility model Figure 1 A magnified schematic diagram of the partial structure of B in the diagram;

[0026] The following are labels in the attached diagram: 1. Valve body; 2. Connecting flange; 3. Butt flange; 4. Adjusting handwheel; 5. Guide shaft; 6. Guide ring; 7. Retaining ring; 8. Locking threaded ring; 9. Bolt; 10. Nut; 11. Hexagonal face; 12. Anti-loosening washer. Detailed Implementation

[0027] The specific embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples. The following examples are used to illustrate this utility model, but are not intended to limit its scope.

[0028] like Figures 1 to 4 As shown, this utility model discloses a corrosion-resistant and impact-resistant civil defense protection valve, comprising a valve body 1 with anti-corrosion treatment and impact resistance, connecting flanges 2 at both ends of the valve body 1, and several through holes evenly distributed through the edge of the planar sidewall of the connecting flange 2, the connecting flange 2 being connected to the pipeline mating flange 3 by several bolts 9 adapted to the through holes, and an adjusting handwheel 4 at the top center of the valve body 1, and further comprising:

[0029] The guide shaft 5 is provided in multiple ways. Multiple mounting holes are evenly distributed through the edge of the plane sidewall of the valve connecting flange 2. The connecting flange 3 of the pipe corresponding to the connecting flange 2 is provided with auxiliary holes. The position and number of auxiliary holes are adapted to the position and number of mounting holes.

[0030] Guide ring 6 is provided in a one-to-one correspondence with guide shaft 5. A guide ring 6 is installed in each of the multiple mounting holes of connecting flange 2 and the multiple auxiliary holes of docking flange 3. The guide ring 6 is installed in the corresponding mounting hole or auxiliary hole by a positioning component. One end of the guide shaft 5 is tightly slidably inserted into the corresponding guide ring 6 on the side of connecting flange 2, and the other end is tightly slidably inserted into and passes through the corresponding guide ring 6 on the side of docking flange 3. The end of the guide ring 6 on the side of connecting flange 2 located inside the valve is provided with a locking component, which locks the guide shaft 5 in the guide ring 6 on the side of connecting flange 2.

[0031] In this embodiment,

[0032] Guide shaft 5: The guide ring 6 runs through the connecting flange 2 and the mating flange 3, forming a rigid constraint to limit the relative misalignment and sliding of the two flanges under impact load, and the core bearing has the function of resisting impact displacement;

[0033] Mounting hole: opened in the connecting flange 2, to provide a mounting reference for the guide ring 6 and ensure the assembly position accuracy of the guide ring 6 and the guide shaft 5;

[0034] Auxiliary holes: These are formed on the mating flange 3, and their number and position are matched with those of the mounting holes. They work in conjunction with the mounting guide ring 6 to provide a through support point for the guide shaft 5, ensuring that the guide shaft 5 is subjected to balanced forces.

[0035] Guide ring 6: Serves as a sliding support carrier for guide shaft 5, reducing direct friction between guide shaft 5 and flange hole wall. At the same time, it is fixed to the flange through positioning components to ensure the assembly stability and assembly accuracy of guide shaft 5.

[0036] Positioning component: Securely installs the guide ring 6 into the corresponding mounting hole or auxiliary hole to prevent the guide ring 6 from shifting and to provide a stable support reference for the guide shaft 5;

[0037] Locking assembly: Locks the guide shaft 5 inside the guide ring 6 on the side of the connecting flange 2 to prevent the guide shaft 5 from moving under impact, and further strengthens the connection constraint between the two flanges.

[0038] As a preferred embodiment of the above, the positioning component includes a retaining ring 7 and a locking threaded ring 8. One end of each guide ring 6 has an external thread on its outer side wall, and the other end is fixedly fitted with a retaining ring 7. The locking component is located on the side of the retaining ring 7. The external thread side of the guide ring 6 is threadedly connected to the locking threaded ring 8. The locking threaded ring 8 cooperates with the retaining ring 7 to lock the guide ring 6 onto the corresponding connecting flange 2 or mating flange 3.

[0039] In this embodiment,

[0040] External thread of guide ring 6: It mates with locking threaded ring 8 to provide a threaded connection basis for fixing guide ring 6;

[0041] Retaining ring 7: It serves to axially limit the guide ring 6, preventing the guide ring 6 from moving inward towards the valve, and at the same time provides a mounting support surface for the locking assembly;

[0042] Locking threaded ring 8: It works with the retaining ring 7 to clamp and fix the guide ring 6 to the connecting flange 2 or the mating flange 3 by tightening the thread, ensuring that the guide ring 6 is firmly connected to the flange and preventing loosening under impact.

[0043] As a preferred embodiment of the above embodiment, the locking assembly includes a bolt 9, and a pin hole is provided through the circumferential side wall of the retaining ring 7 of the guide ring 6. The center hole of the retaining ring 7 is connected to the middle of the pin hole. A through hole is provided through the circumferential side wall of the guide shaft 5 located in the guide ring 6 on the connecting flange 2. The bolt 9 is inserted into the pin hole from one side, and then passes through the through hole of the guide shaft 5 and extends out from the other side of the pin hole. The bolt 9 is locked on the retaining ring 7 of the guide ring 6 by a nut 10.

[0044] In this embodiment,

[0045] Bolt 9: As the core actuator of the locking assembly, it passes through the pin hole of the guide ring 6 and the through hole of the guide shaft 5 to achieve a rigid connection between the guide shaft 5 and the guide ring 6;

[0046] Pin hole: Provides an installation channel for bolt 9 and connects with the center hole of retaining ring 7 to ensure that bolt 9 can pass through guide shaft 5 accurately;

[0047] Through hole: opened in guide shaft 5, for bolt 9 to pass through, so that bolt 9 can form a radial locking force on guide shaft 5;

[0048] Nut 10: It is used in conjunction with bolt 9 to lock the guide shaft 5 firmly inside the guide ring 6, preventing the guide shaft 5 from sliding relative to the guide ring 6 and strengthening the constraint effect of the flange connection.

[0049] As a preferred embodiment of the above, a conical surface is provided between the circumferential sidewall of the retaining ring 7 and the circumferential sidewall of the guide ring 6, and a conical surface is also provided on the side of the circumferential sidewall of the locking threaded ring 8 near the retaining ring 7.

[0050] In this embodiment,

[0051] The conical surface between the retaining ring 7 and the guide ring 6: Utilizing the gradual diameter characteristics of the conical surface, it can be adapted to mounting holes or auxiliary holes of different diameters (within a reasonable dimensional error range). It can achieve a tight fit without strictly matching a single hole diameter, thus improving the flexibility of the guide ring 6 in adapting to flange holes of different sizes.

[0052] The conical surface on the side of the locking threaded ring 8 forms a bidirectional gradual adaptation structure with the conical surface on the side of the retaining ring 7, further expanding the compatibility range for the size deviation of the mounting hole and auxiliary hole. At the same time, when tightening the locking threaded ring 8, the conical surface can automatically align the position of the guide ring 6 to ensure the coaxiality of the guide ring 6 and the flange hole, taking into account both compatibility and installation stability.

[0053] As a preferred embodiment of the above embodiment, the side of the outer circumferential sidewall of the locking threaded ring 8 away from the retaining ring 7 is provided as a hexagonal surface 11;

[0054] In this embodiment,

[0055] The hexagonal face 11 of the locking threaded ring 8 is compatible with common tools such as wrenches, making it convenient for operators to quickly tighten or loosen the locking threaded ring 8, thus improving the ease of installation and maintenance.

[0056] As a preferred embodiment of the above, both ends of the mounting hole of the connecting flange 2 and both ends of the auxiliary hole of the mating flange 3 are set as conical surfaces that expand from the inside to the outside, and the conical surfaces on both sides of the mounting hole or auxiliary hole are adapted to the arc angle of the conical surface on the side of the retaining ring 7 and the conical surface of the locking threaded ring 8.

[0057] In this embodiment,

[0058] The conical surfaces at both ends of the mounting hole and auxiliary hole are adapted to the conical surfaces of the guide ring 6, retaining ring 7, and locking threaded ring 8, achieving a tight fit between the surfaces, reducing gaps, minimizing mutual wear, improving the structure's ability to withstand impact loads, and enhancing the coaxiality of the guide ring 6 during installation.

[0059] As a preferred embodiment of the above embodiment, an anti-loosening washer 12 is provided between the nut 10 and the retaining ring 7 of the locking assembly;

[0060] In this embodiment,

[0061] Anti-loosening washer 12: It is set between nut 10 and retaining ring 7. It uses its elasticity or friction to prevent nut 10 from loosening under impact and vibration conditions, maintains the fixing effect of locking assembly on guide shaft 5, and ensures the long-term stability of the overall structure.

[0062] The working principle of this utility model is as follows:

[0063] This utility model constructs a dual-constraint flange connection structure by adding suitable mounting holes, auxiliary holes, and matching guide shafts 5, guide rings 6, positioning components, and locking components to the connecting flange 2 and the mating flange 3. First, the guide ring 6 is firmly fixed in the mounting hole or auxiliary hole by the cooperation of the external threads of the retaining ring 7 and the locking thread ring 8. The conical surface adaptation improves the stability and fit of the guide ring 6 during installation. Then, the guide shaft 5 passes through the guide ring 6 on both sides of the connecting flange 2 and the mating flange 3. The guide shaft 5 is locked by the locking component consisting of bolts 9, nuts 10, and anti-loosening washers 12, so that the guide shaft 5 forms a rigid support and constrains the relative displacement of the two flanges. When encountering strong impact, the cooperation between the guide shaft 5 and the guide ring 6 can effectively resist the misalignment and sliding of the flanges and prevent the sealing gasket from being damaged by shearing and compression. At the same time, the corrosion-resistant and impact-resistant design of the valve body 1 itself ensures basic performance. Ultimately, this achieves the purpose of improving the valve's impact resistance and leakage prevention capabilities, and ensuring the safe and stable operation of the pipeline system of civil defense projects.

[0064] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. A corrosion-resistant and impact-resistant civil defense protection valve, comprising a valve body (1) with anti-corrosion treatment and impact resistance, wherein connecting flanges (2) are provided at both ends of the valve body (1), and several through holes are evenly distributed through the edge of the planar sidewall of the connecting flanges (2), and the connecting flanges (2) are connected to the connecting flanges (3) of the pipeline by several bolts (9) adapted to the through holes, and an adjusting handwheel (4) is provided at the top of the middle part of the valve body (1), characterized in that, Also includes: The guide shaft (5) is provided in multiple ways. Multiple mounting holes are evenly distributed through the edge of the plane sidewall of the valve connecting flange (2). The connecting flange (3) of the pipe corresponding to the connecting flange (2) is provided with auxiliary holes. The position and number of auxiliary holes are adapted to the position and number of mounting holes. Guide ring (6) is provided in a one-to-one correspondence with guide shaft (5). A guide ring (6) is installed in each of the multiple mounting holes of the connecting flange (2) and the multiple auxiliary holes of the docking flange (3). The guide ring (6) is installed in the corresponding mounting hole or auxiliary hole by a positioning component. One end of the guide shaft (5) is tightly slidably inserted into the corresponding guide ring (6) on the side of the connecting flange (2), and the other end is tightly slidably inserted into and passes through the corresponding guide ring (6) on the side of the docking flange (3). The end of the guide ring (6) on the side of the connecting flange (2) located inside the valve is provided with a locking component. The locking component locks the guide shaft (5) in the guide ring (6) on the side of the connecting flange (2).

2. The corrosion-resistant and impact-resistant civil defense protection valve as described in claim 1, characterized in that, The positioning assembly includes a retaining ring (7) and a locking threaded ring (8). Each guide ring (6) has an external thread on one side of its outer wall, and the retaining ring (7) is fixedly fitted on the other end. The locking assembly is located on the side of the retaining ring (7). The external thread side of the guide ring (6) is threadedly connected to the locking threaded ring (8). The locking threaded ring (8) and the retaining ring (7) cooperate to lock the guide ring (6) onto the corresponding connecting flange (2) or mating flange (3).

3. The corrosion-resistant and impact-resistant civil defense protection valve as described in claim 2, characterized in that, The locking assembly includes a bolt (9). The circumferential sidewall of the retaining ring (7) of the guide ring (6) is provided with a pin hole. The center hole of the retaining ring (7) is connected to the middle of the pin hole. The circumferential sidewall of the guide shaft (5) located in the guide ring (6) on the connecting flange (2) is provided with a through hole. The bolt (9) is inserted into the pin hole from one side, and then passes through the through hole of the guide shaft (5) and extends out from the other side of the pin hole. The bolt (9) is locked on the retaining ring (7) of the guide ring (6) by a nut (10).

4. The corrosion-resistant and impact-resistant civil defense protection valve as described in claim 3, characterized in that, A conical surface is provided between the circumferential sidewall of the retaining ring (7) and the circumferential sidewall of the guide ring (6), and a conical surface is also provided on the side of the circumferential sidewall of the locking threaded ring (8) near the retaining ring (7).

5. The corrosion-resistant and impact-resistant civil defense protection valve as described in claim 4, characterized in that, The outer circumferential sidewall of the locking threaded ring (8) away from the retaining ring (7) is set as a hexagonal face (11).

6. The corrosion-resistant and impact-resistant civil defense protection valve as described in claim 4, characterized in that, Both ends of the mounting hole of the connecting flange (2) and both ends of the auxiliary hole of the mating flange (3) are set as conical surfaces that expand from the inside out. The conical surfaces on both sides of the mounting hole or auxiliary hole are adapted to the arc angle of the conical surface on the side of the retaining ring (7) and the conical surface of the locking threaded ring (8).

7. The corrosion-resistant and impact-resistant civil defense protection valve as described in claim 3, characterized in that, An anti-loosening washer (12) is provided between the nut (10) and the retaining ring (7) of the locking assembly.

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