Waterproof safety valve

Abstract

According to the waterproof safety valve, a safety valve protection sleeve made of a rubber material is used, the safety valve protection sleeve is a bent cylinder, the length of the outlet end of the safety valve protection sleeve is increased, a tooth-shaped labyrinth structure formed by splicing is installed in the outlet end of the safety valve protection sleeve, and splashing water or gravel is prevented from entering the safety valve protection sleeve; meanwhile, on the basis that an existing V-shaped ring with the exhaust function is reserved, a waterproof breathable film is additionally arranged at the outlet end of the safety valve body, air is allowed to freely enter a non-sealing cavity and water is prevented from entering the non-sealing cavity by means of the magnitude order difference between the volume of gas molecules and the volume of water molecules, and the safety valve has the two-way ventilation waterproof function. By optimizing the structure of the safety valve protecting sleeve, the safety valve is prevented from losing efficacy after being coated with ice and snow, meanwhile, the waterproof air inlet function is newly added, and the reliability of normal work of the safety valve under the severe working conditions of snow covering and icing is improved.

Description

Technical Field

[0001] The invention relates to the technical field of safety valve design, and in particular to a waterproof safety valve. Background Art

[0002] Safety valve is a special valve. It is different from other valves that only play the role of opening and closing. More importantly, it plays the role of protecting the safety of equipment. With the rapid development of my country's economic construction, there are more and more equipment projects with pressure control. In view of the need for equipment pressure relief, safety valve plays a vital role in protecting equipment.

[0003] The working principle of the safety valve is that when the medium pressure in the equipment or pipeline exceeds the specified value, the medium is discharged to the outside of the system to prevent the medium pressure in the pipeline or equipment from exceeding the specified value. This ensures that the system will not have accidents due to excessive pressure. The safety valve belongs to the automatic valve category and is mainly used for boilers, pressure vessels and pipelines to play an important protective role.

[0004] At present, the non-sealed chamber of the piston brake cylinder exchanges gas with the external atmosphere during the brake release process. The existing vent plug has a two-way ventilation function, and the safety valve has a one-way exhaust function. When the brake cylinder is in a harsh working condition of snow and ice, the vent plug and the safety valve are easily covered and blocked by ice and snow, causing the brake cylinder to malfunction. For example, when the safety valve is covered by ice and snow and becomes invalid after being blocked, it cannot release the pressure when the pressure in the non-sealed chamber is too high, causing the dust cover to expand abnormally and be easily pierced by flying stones; when the vent plug fails after being blocked and the safety valve functions normally, the negative pressure generated in the non-sealed chamber after filling and exhausting cannot be balanced, causing the dust cover to be severely deformed and tightened.

[0005] The existing patent CN104964118B discloses a composite exhaust valve, including a split valve seat, each of which is provided with a flange on both sides of the split valve seat, and the two flanges are located at different heights, a large exhaust device is provided on the flange with a lower height, and a small exhaust device is provided on the flange with a higher height; the large exhaust device includes a filter plate, a large guide cylinder, a large sealing ring, a large exhaust top cover and a large float, and the small exhaust device includes a buffer mechanism, a small guide cylinder, a small sealing ring, a small exhaust top cover and a small float, and the buffer mechanism includes a buffer bottom plate, a buffer partition and a buffer top plate, a buffer top plate, a buffer bottom plate and a buffer mechanism flow channel. The exhaust valve focuses on the above structure, which can effectively reduce the gas pressure, prevent the occurrence of gas sealing, and achieve trace exhaust, but does not solve the problem in the prior art that the vent plug and the safety valve of the piston brake cylinder are easily covered by ice and snow, blocked, and cause the brake cylinder to be abnormal.

[0006] The existing patent CN221423981U discloses a natural gas pipeline safety valve, including a valve cover, the bottom surface of the valve cover is fixedly connected with an upper flange, the surface of the upper flange is provided with a plurality of groups of limiting holes, the inside of the limiting hole is slidably connected with a fixing rod, the inside of the fixing rod is threadedly connected with a locking assembly, the bottom end of the fixing rod is clamped with a lower flange, and the bottom surface of the lower flange is fixedly connected with a valve body. The natural gas pipeline safety valve, through the setting of the fixing rod, the locking assembly and the groove, when in use, align the upper flange with the lower flange, put the fixing rod into the limiting hole and the groove, release the ball from the sliding hole of the fixing rod, the ball is clamped on the pressing block inside the groove, and the knob is turned to lock and fix the adjusting rod with the inside of the fixing rod. The safety valve focuses on achieving the effect of rapid disassembly and assembly, avoiding increasing working time and reducing working efficiency during daily maintenance, and does not solve the problem that the vent plug and the safety valve of the piston brake cylinder in the prior art are easily covered by ice and snow, blocked, and cause abnormality of the brake cylinder.

[0007] In summary, the above two existing patents have not solved the problem in the prior art that the vent plug and the safety valve of the piston brake cylinder are easily covered and blocked by ice and snow, causing abnormalities in the brake cylinder. Summary of the invention

[0008] Based on the above technical problems, the present invention proposes a waterproof safety valve to solve the problem in the prior art that the vent plug and the safety valve of the piston brake cylinder are easily covered and blocked by ice and snow, causing abnormalities in the brake cylinder.

[0009] To achieve the above purpose, the present invention proposes a waterproof safety valve, which optimizes the structure to prevent the safety valve from failing after being covered by ice and snow, and adds a waterproof air intake function. The specific technical solution is as follows:

[0010] A waterproof safety valve comprises a valve body, a V-ring in the middle of the valve body, and a safety valve protective sleeve sleeved on the outside of the valve body, wherein the V-ring is used for exhausting air, and the safety valve protective sleeve is a curved cylinder, one end of the safety valve protective sleeve is fixedly sleeved on the outside of the air inlet of the valve body, and the other end is the outlet end, and the safety valve protective sleeve can protect the V-ring and the air outlet of the valve body inside.

[0011] Furthermore, it also includes a spacer ring, which is an annular member and is fixedly installed on the outer side of one end of the air inlet of the valve body. The spacer ring is used to fix the safety valve protective sleeve.

[0012] Furthermore, an annular groove is provided on the outer end surface of the spacer ring, and an annular protrusion is provided on the inner side of the safety valve protection sleeve which is sleeved on one end of the valve body, and the annular groove and the annular protrusion can cooperate with each other to engage with each other.

[0013] Furthermore, the outlet end of the safety valve protective sleeve is an oblique opening, and the inclination angle of the oblique opening is 30° to 60°.

[0014] Furthermore, a first tooth structure and a second tooth structure are installed inside the outlet end of the safety valve protective sleeve, and the first tooth structure and the second tooth structure are spliced ​​to form a tooth structure maze.

[0015] Furthermore, the material of the safety valve protective cover is rubber.

[0016] Furthermore, it also includes a waterproof and breathable membrane, which is installed at the air outlet of the valve body.

[0017] Furthermore, it also includes a support installed between the valve body and the waterproof breathable membrane, and the support is a porous non-woven fabric, which is used to support the waterproof breathable membrane.

[0018] Furthermore, it also includes a dust cover, which is press-fitted on the outer side of the waterproof breathable membrane and is used to fix the waterproof breathable membrane. A plurality of small holes are evenly distributed on the cylindrical surface of the dust cover.

[0019] Furthermore, it also includes a safety valve inner sleeve, which is sleeved between the V-rings and is used to seal the V-rings.

[0020] Based on the above technical solution, a waterproof safety valve proposed by the present invention has at least the following beneficial effects:

[0021] 1. The waterproof safety valve proposed in the present invention optimizes the protective sleeve structure to prevent the safety valve from failing after being covered by ice and snow. It can work normally under harsh working conditions such as snow and ice, thereby improving the overall reliability of the brake cylinder.

[0022] 2. The waterproof safety valve proposed by the present invention has an outlet end of a safety valve protective sleeve with an oblique mouth design, which is conducive to water dripping along the oblique mouth. If it is a flat mouth, water drops may hang on the outlet end and easily freeze when the temperature is low; at the same time, it can prevent the safety valve from forming a low-pressure area at the opening due to the fluid pressure when it is used at high speed, causing foreign matter to enter the safety valve protective sleeve with the air.

[0023] 3. The waterproof safety valve proposed by the present invention has a toothed maze structure installed inside the outlet end of the safety valve protective sleeve, which can effectively prevent splashing water and sand from entering the interior of the safety valve protective sleeve.

[0024] 4. The waterproof safety valve proposed in the present invention has a new waterproof and breathable function. A waterproof and breathable membrane is installed at one end of the safety valve body. The order of magnitude difference between the volumes of gas molecules and water molecules is utilized to allow air to freely enter the non-sealed cavity and prevent water from entering the non-sealed cavity, thereby avoiding freezing of water after entering the non-sealed cavity and affecting the performance of the brake cylinder. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The accompanying drawings constituting a part of the present invention are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the accompanying drawings:

[0026] Figure 1 The present invention provides a schematic structural diagram of a waterproof safety valve.

[0027] Figure numerals: 1-valve body, 2-V-ring, 3-safety valve inner sleeve, 4-spacer ring, 5-safety valve protective sleeve, 6-support, 7-waterproof breathable membrane, 8-dust cover, 9. first tooth structure, 10. second tooth structure. DETAILED DESCRIPTION

[0028] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0029] The present invention is further described in detail below in conjunction with specific embodiments. These embodiments should not be construed as limiting the scope of protection claimed by the present invention.

[0030] Example

[0031] In order to solve the problem in the prior art that the vent plug and the safety valve of the piston brake cylinder are easily covered and blocked by ice and snow, causing the brake cylinder to become abnormal, this embodiment proposes a waterproof safety valve.

[0032] To achieve the above purpose, this embodiment proposes a waterproof safety valve, which optimizes the structure to prevent the safety valve from failing after being covered by ice and snow, and at the same time adds a waterproof air intake function.

[0033] See also Figure 1 As shown, the safety valve includes a valve body 1, a V-ring 2, a safety valve inner sleeve 3, a spacer ring 4, a safety valve protective sleeve 5, a support 6, a waterproof and breathable membrane 7, a dust cover 8, a first tooth structure 9 and a second tooth structure 10.

[0034] Specifically, one end of the valve body 1 is an air inlet for connecting to a pressure device or pipeline, and the other end is an air outlet. The V-ring 2 is arranged in the middle of the valve body 1, and is used to exhaust air outward when the medium pressure in the pressure device or pipeline exceeds a specified value. The safety valve inner sleeve 3 is a ring sleeve that acts as a seal. The safety valve inner sleeve 3 is sleeved between the V-rings 2 on the left and right sides of the middle of the valve body 1. The safety valve inner sleeve 3 squeezes the V-ring 2 to achieve a one-way seal of the V-ring 2.

[0035] Optionally, the material of the safety valve inner sleeve 3 may be corrosion-resistant materials such as polytetrafluoroethylene or graphite.

[0036] Specifically, the waterproof breathable membrane 7 is installed at the air outlet of the valve body 1, and the support 6 is installed between the air outlet of the valve body 1 and the waterproof breathable membrane 7. The support 6 is a porous non-woven fabric, which is used to support the waterproof breathable membrane 7 to prevent the waterproof breathable membrane 7 from deforming into the non-sealed cavity of the valve body 1 when the air pressure inside the non-sealed cavity is relatively low; at the same time, the outer side of the waterproof breathable membrane 7 is fixed by an externally pressed dust cover 8, and a plurality of small holes are evenly distributed on the cylindrical surface of the dust cover 8. External gas can pass through the waterproof breathable membrane 7 through the small holes on the dust cover to enter and exit the valve body 1.

[0037] According to the order of magnitude difference between the volume of gas molecules and water molecules, the waterproof breathable membrane 7 allows external air to freely enter the non-sealed cavity of the valve body 1, and prevents water from entering the non-sealed cavity of the valve body 1. At the same time, the filter membrane is hydrophobic, and the filtered water will not accumulate or freeze on the surface of the filter membrane, causing the waterproof breathable membrane to fail. In this way, the safety valve can be bidirectionally ventilated and has a waterproof function, solving the problem that the negative pressure generated in the non-sealed cavity of the safety valve after inflation and exhaust cannot be balanced, causing the dust cover to be severely deformed and tightened.

[0038] Specifically, the spacer ring 4 is an annular member, which is fixedly arranged on the outer side of one end of the air inlet of the valve body 1 , and an annular groove is provided on the annular end surface of the spacer ring 4 for fixing the safety valve protective sleeve 5 .

[0039] Specifically, the safety valve protective sleeve 5 is a curved cylinder, and the safety valve protective sleeve 5 is sleeved on the outside of the valve body 1. One end of the safety valve protective sleeve 5 is a fixed end, and the fixed sleeve is arranged on the outside of the air inlet of the valve body 1. The other end is the outlet end, and the angle between the central axis of the outlet end and the central axis of the fixed end is 90°-150°. An annular protrusion is provided on the inner side of the end of the safety valve protective sleeve 5 close to the air inlet of the valve body 1. The annular protrusion and the annular groove on the spacer ring 4 can cooperate and engage with each other, so that the safety valve protective sleeve 5 can be fixedly sleeved on the outside of the valve body 1, and there is a space margin between the inner side of the safety valve protective sleeve 5 and the valve body 1. Therefore, when the valve body 1 is placed horizontally for use, the outlet end of the safety valve protective sleeve 5 can be oriented downward, so that the air outlet and the V-ring 2 of the valve body 1 can be completely protected in the safety valve protective sleeve 5, reducing the probability of the safety valve being covered with snow and ice, and avoiding the failure of the safety valve function.

[0040] Optionally, the material of the safety valve protection sleeve 5 can be rubber.

[0041] Optionally, the opening of the outlet end of the safety valve protective sleeve 5 can be designed with an oblique opening, and the inclination angle of the oblique opening is 30° to 60°, preferably 45°. The oblique opening design is conducive to water dripping along the oblique opening. If it is a flat opening, water drops may hang on the outlet end and easily freeze when the temperature is low; at the same time, it can prevent the safety valve from being used at high speed due to the formation of a low-pressure area at the opening due to the fluid pressure, so that foreign matter enters the safety valve protective sleeve 5 with the air.

[0042] In some other embodiments, a first tooth structure 9 and a second tooth structure 10 are also installed inside the outlet end of the safety valve protective sleeve 5. The first tooth structure 9 and the second tooth structure 10 are installed relatively to each other inside the outlet end of the safety valve protective sleeve 5, and the two are spliced ​​to form a toothed maze structure, which can effectively prevent splashing water and sand from entering the interior of the safety valve protective sleeve 5.

[0043] Specifically, the first tooth structure 9 and the second tooth structure 10 are multi-tooth structures, specifically E-shaped structures or F-shaped structures, and their comb teeth are all inclined. When the first tooth structure 9 and the second tooth structure 10 are installed inside the outlet end of the safety valve protective sleeve 5, the inclined direction of the comb teeth is downward, and the comb teeth of the first tooth structure 9 and the second tooth structure 10 are staggered.

[0044] Optionally, the material of the first tooth-shaped structure 9 and the second tooth-shaped structure 10 can be nylon.

[0045] The waterproof safety valve provided by the present invention is used for a piston brake cylinder. When the brake cylinder is in a severe working condition of being covered with snow or ice, the air outlet end of the valve body and the V-ring structure in the middle are in the safety valve protective sleeve, and the opening of the safety valve protective sleeve faces downward, which greatly reduces the probability of the safety valve being covered with snow or ice, and avoids failure of the safety valve function. At the same time, a waterproof and breathable membrane is installed at the outlet end of the safety valve, so that the safety valve has a two-way ventilation function, which solves the problem that the negative pressure generated in the non-sealed cavity of the safety valve after inflation and exhaust cannot be balanced, resulting in serious deformation and tightening of the dust cover. In addition, the outlet end isolates water in the external atmosphere while taking in air, and avoids freezing of the non-sealed cavity after water enters the non-sealed cavity, which affects the performance of the brake cylinder.

[0046] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

[0047] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0048] It should be noted that, in the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, unless they are contradictory.

Claims

1. A waterproof safety valve, comprising a valve body (1), a V-ring (2) in the middle of the valve body (1), and a safety valve protective sleeve (5) sleeved on the outside of the valve body (1), wherein the V-ring (2) is used for exhaust, and is characterized in that: The safety valve protection sleeve (5) is a curved cylinder. One end of the safety valve protection sleeve (5) is fixedly sleeved on the outside of the air inlet of the valve body (1), and the other end is the outlet. The safety valve protection sleeve (5) can protect the V-ring (2) and the air outlet of the valve body (1) inside.

2. The waterproof safety valve according to claim 1, characterized in that: It also comprises a spacer ring (4), which is a ring-shaped part and is fixedly mounted on the outer side of one end of the air inlet of the valve body (1). The spacer ring (4) is used to fix the safety valve protective sleeve (5).

3. The waterproof safety valve according to claim 2 is characterized in that: The outer end surface of the spacer ring (4) is provided with an annular groove, and the safety valve protection sleeve (5) is sleeved on the inner side of one end of the valve body (1) and is provided with an annular protrusion, and the annular groove and the annular protrusion can cooperate with each other to engage with each other.

4. The waterproof safety valve according to any one of claim 1, characterized in that: The outlet end of the safety valve protection sleeve (5) is an oblique opening, and the inclination angle of the oblique opening is 30° to 60°.

5. The waterproof safety valve according to any one of claim 1, characterized in that: A first tooth structure (9) and a second tooth structure (10) are installed inside the outlet end of the safety valve protection sleeve (5), and the first tooth structure (9) and the second tooth structure (10) are spliced ​​to form a tooth structure maze.

6. The waterproof safety valve according to any one of claims 1 to 5, characterized in that: The material of the safety valve protection sleeve (5) is rubber.

7. The waterproof safety valve according to claim 1, characterized in that: It also comprises a waterproof and breathable membrane (7), wherein the waterproof and breathable membrane (7) is installed at the air outlet of the valve body (1).

8. The waterproof safety valve according to claim 7, characterized in that: It also includes a support (6) installed between the air outlet of the valve body (1) and the waterproof breathable membrane (7), wherein the support (6) is a porous non-woven fabric and is used to support the waterproof breathable membrane (7).

9. The waterproof safety valve according to claim 7, characterized in that: It also includes a dust cover (8), which is press-fitted onto the outer side of the waterproof breathable membrane (7) and is used to fix the waterproof breathable membrane (7). A plurality of small holes are evenly distributed on the cylindrical surface of the dust cover (8).

10. The waterproof safety valve according to claim 1, characterized in that: It also comprises a safety valve inner sleeve (3), wherein the safety valve inner sleeve (3) is sleeved between the V-shaped rings (2) and is used to seal the V-shaped rings (2).

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