A safety relief valve

Abstract

The utility model provides a kind of safety pressure relief valve, including valve body, air inlet passage, sliding channel and gas escape passage are provided in valve body, gas escape passage is communicated with air inlet passage and sliding channel;Top core is slidably installed in sliding channel, exhaust passage is provided in top core;At least one airflow hole is provided in the lateral wall of top core, the end of top core is closed and outer wall is provided with limit portion, first blocking portion is provided in valve body;The diameter of gas escape passage is less than the diameter of exhaust passage;Plug gas structure is used to plug exhaust passage.When gas escapes, open plug gas structure, gas will push top core outward, limit portion cooperates with first blocking portion 123, airflow is discharged from exhaust passage after passing through gas escape passage, airflow hole in turn from air inlet passage.Gas flow is slow because the diameter of gas escape passage is less than the diameter of exhaust passage, and airflow cannot directly enter exhaust passage from air inlet passage, so airflow will not directly impact plug gas structure on operator, avoiding safety accident.

Description

Technical Field

[0001] This utility model relates to the field of safety valve technology, and in particular to a safety pressure relief valve. Background Technology

[0002] In fields such as chemical, petroleum, and aerospace high-pressure gas sources, multiple pipeline ports are often reserved. When not in use, these ports are sealed with nuts and plugs. A bypass vent valve is installed in the pipeline. Before maintenance or disassembly, for safety, the bypass vent valve must be opened to release gas. The operator can then determine the presence of residual gas in the pipeline by sound before removing the plug. However, due to human error, it is possible to forget to open the bypass vent valve and directly unscrew the nut at the pipeline port. The residual high-pressure gas in the pipeline could then force the plug out, directly impacting a person and causing a safety accident. Summary of the Invention

[0003] This utility model provides a safety pressure relief valve to solve the technical problem that residual high-pressure gas in the pipeline can cause the plug to be ejected and a safety accident to occur after the nut is opened.

[0004] This utility model provides a safety pressure relief valve, comprising: The valve body is provided with an air inlet channel, a sliding channel and an air venting channel. One end of the air venting channel is connected to the air inlet channel and the other end of the air venting channel is connected to the sliding channel. The top core is slidably installed within the sliding channel, and an exhaust channel is provided inside the top core. The outer diameter of the top core matches the inner diameter of the sliding channel. At least one airflow hole is provided on the side wall of the top core. The end of the top core near the air inlet channel is closed, and a limiting part is provided on the outer wall of the top core. A first blocking part is provided inside the valve body to prevent the top core from moving out. The diameter of the venting channel is smaller than the diameter of the exhaust channel. An air-blocking structure is used to block the exhaust passage and prevent gas from being discharged through the exhaust passage.

[0005] In one embodiment of the present invention, the valve body includes a valve cover and a valve seat, the air inlet channel is disposed in the valve seat, the sliding channel and the venting channel are both disposed in the valve cover, and the air-blocking structure is connected to the valve cover.

[0006] In one embodiment of the present invention, the valve seat extends toward the valve cover and is provided with a first protrusion, the valve cover is provided with a connecting groove connected to the first protrusion at one end near the valve seat, a second protrusion is provided inside the connecting groove, and the venting channel is located inside the second protrusion.

[0007] In one embodiment of the present invention, the diameter of the second boss is smaller than the inner diameter of the first boss.

[0008] In one embodiment of the present invention, the sliding channel and the air inlet channel are arranged along the axial direction of the valve body, and the air venting channel is arranged perpendicular to the sliding channel.

[0009] In one embodiment of this utility model, a sealing ring is provided in the connecting groove.

[0010] In one embodiment of the present invention, the valve seat is provided with a second blocking part to prevent the top core from moving out of the sliding channel near the air intake channel.

[0011] In one embodiment of the present invention, the second blocking part divides the air intake channel into a first segment and a second segment, and the flow cross section of the second segment gradually increases from the side closer to the first segment to the side farther away from the first segment.

[0012] In one embodiment of the present invention, the limiting part is a baffle, the baffle closes the end of the top core, and the diameter of the baffle is larger than the inner diameter of the exhaust channel.

[0013] In one embodiment of the present invention, the air-blocking structure includes a plug and a nut. The plug is used to block the exhaust passage, and the nut is connected to the valve body to fix the plug.

[0014] The beneficial effects of this utility model are as follows: This utility model proposes a safety pressure relief valve with a top core. An airflow hole is provided on the side wall of the top core, and the end of the top core near the air inlet channel is closed. When blocking air, the blocking structure presses the top core towards the air inlet channel, and the side wall of the top core seals the venting channel 122. When venting, the blocking structure is opened, and the gas in the air inlet channel pushes the top core outward. The limiting part cooperates with the first blocking part 123. The airflow hole is located within the sliding channel, and the airflow passes sequentially from the air inlet channel through the venting channel and the airflow hole before being discharged from the exhaust channel. Because the diameter of the venting channel is smaller than that of the exhaust channel, the pressure of the discharged airflow is lower than that of the airflow in the air inlet channel. The airflow discharge is slow, and the airflow cannot directly enter the exhaust channel from the air inlet channel. Residual gas cannot directly impact the blocking structure, preventing it from directly impacting the operator and avoiding safety accidents. Attached Figure Description

[0015] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application. It is obvious that the drawings described below are merely some embodiments of this application, and those skilled in the art can obtain other drawings based on these drawings without any inventive effort.

[0016] In the attached diagram: Figure 1 An exploded view of a safety relief valve provided in an embodiment of this utility model; Figure 2 This is a cross-sectional view after the top core has been pressed in; Figure 3 This is a cross-sectional view after the top core has been ejected.

[0017] The attached figures are labeled as follows: Valve body 1, valve seat 11, air inlet channel 111, first boss 112, second blocking part 113, valve cover 12, sliding channel 121, venting channel 122, first blocking part 123, connecting groove 124, second boss 125, sealing ring 13, top core 2, exhaust channel 21, airflow hole 22, limiting part 23, air blocking structure 3, plug 31, nut 32. Detailed Implementation

[0018] The following specific examples illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification. This utility model can also be implemented or applied through other different specific embodiments. Various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of this utility model. In the absence of conflict, the following embodiments and features in the embodiments can be combined with each other.

[0019] It should be noted that the illustrations provided in the following embodiments are only schematic representations of the basic concept of the present invention. The drawings only show the components related to the present invention and are not drawn according to the actual number, shape and size of the components. In actual implementation, the form, quantity and proportion of each component can be arbitrarily changed, and the layout of the components may also be more complex.

[0020] In the following description, numerous details are explored to provide a more thorough explanation of embodiments of the present invention. However, it will be apparent to those skilled in the art that embodiments of the present invention may be practiced without these specific details. In other embodiments, well-known structures and devices are shown in block diagram form rather than in detail to avoid obscuring embodiments of the present invention.

[0021] Please see Figures 1 to 3This utility model provides a safety pressure relief valve, including a valve body 1, a top core 2, and an air-blocking structure 3. The valve body 1 has an air inlet channel 111 and a sliding channel 121. The top core 2 is slidably disposed within the sliding channel 121, and the outer diameter of the top core 2 matches the inner diameter of the sliding channel 121, allowing the top core 2 to slide relative to the valve body 1. The top core 2 has an exhaust channel 21. During normal use, the air-blocking structure 3 connects to the valve body 1, sealing the exhaust channel 21.

[0022] The valve body 1 also includes a venting channel 122. One end of the venting channel 122 is connected to the intake channel 111, and the other end is connected to the sliding channel 121. To ensure that the pressure of the discharged gas is low and does not cause safety hazards to the human body during venting, the diameter of the venting channel 122 is smaller than the diameter of the exhaust channel 21. The side wall of the top core 2 is provided with at least one airflow hole 22. A limiting part 23 is provided on the side of the top core 2 near the intake channel 111. The valve body 1 includes a first blocking part 123 to prevent the top core 2 from moving away from the side of the sliding channel 121 away from the intake channel 111. The side of the top core 2 near the intake channel 111 is closed.

[0023] In some embodiments, the limiting part 23 is a baffle that closes the end of the top core 2, and the diameter of the baffle is larger than the inner diameter of the exhaust channel 21, so that the limiting part 23 not only plays the role of limiting and preventing the top core 2 from moving excessively or leaving the sliding channel 121, but also plays the role of blocking the exhaust channel 21.

[0024] In some embodiments, the diameter of the venting channel 122 is half the diameter of the exhaust channel 21, or smaller. For example, if the diameter of the exhaust channel 21 is 10 mm, then the diameter of the venting channel 122 is no greater than 5 mm.

[0025] In some embodiments, a plurality of airflow holes 22 are provided along the sidewall of the top core 2. The number of airflow holes 22 is greater than the number of venting channels 122. This design ensures that when the top core 2 is at any rotation angle, there is always a venting channel 122 connected to the airflow hole 22, thereby ensuring the reliability and continuity of the pressure relief process and avoiding venting failure caused by structural alignment problems.

[0026] When the pipeline is in normal use, the air-blocking structure 3 presses the top core 2 against the side of the air inlet channel 111. At this time, the side wall of the top core 2 blocks the air vent channel 122. The airflow enters from the air inlet channel 111 and flows into the exhaust channel 21 through the airflow hole 22 on the side wall of the top core 2, but is ultimately blocked by the air-blocking structure 3 and cannot be discharged, thereby maintaining the seal and pressure stability in the pipeline.

[0027] When the air-blocking structure 3 is removed from the valve body 1, if there is residual gas with high pressure in the pipeline, the airflow will push the top core 2 outward. At this time, the first blocking part 123 and the limiting part 23 on the top core 2 cooperate with each other to prevent the top core 2 from completely disengaging from the sliding channel 121. After the top core 2 moves outward, the airflow hole 22 on its side wall is no longer located in the air intake channel 111, but in the sliding channel 121, and the airflow cannot directly enter the exhaust channel 21 from the air intake channel 111 through the airflow hole 22. At the same time, the outward movement of the top core 2 connects the airflow hole 22 with the venting channel 122. The residual gas will enter the airflow hole 22 through the venting channel 122 and then flow into the exhaust channel 21. This airflow path is tortuous, which significantly increases the flow resistance, effectively slows down the gas escape velocity, achieves buffered discharge of residual gas, and thus improves operational safety.

[0028] In some embodiments, to facilitate the installation of the top core 2, the valve body 1 adopts a split structure design. The valve body 1 includes a valve cover 12 and a valve seat 11. The air inlet channel 111 is disposed in the valve seat 11, and the sliding channel 121 and the venting channel 122 are both disposed in the valve cover 12. The air-blocking structure 3 is connected to the valve cover 12 to achieve sealing of the exhaust channel 21.

[0029] During assembly, the top core 2 is first inserted upwards through the opening at the bottom of the sliding channel 121, ensuring it is accurately embedded within the sliding channel 121. Then, the valve cover 12 and valve seat 11 are aligned and securely connected, thus completing the assembly of the entire valve body 1. This split design and stepped installation process not only simplifies operation but also improves assembly accuracy and maintenance convenience.

[0030] In some embodiments, the valve seat 11 and the valve cover 12 are connected by threads to improve assembly flexibility and sealing controllability. A first boss 112 is provided on the end of the valve seat 11 near the valve cover 12, and the outer wall of the first boss 112 is provided with external threads. A connecting groove 124 is provided on the end of the valve cover 12 near the valve seat 11, connecting to the first boss 112, and the connecting groove 124 is provided with internal threads. A second boss 125 is provided on the inner side of the connecting groove 124, and a venting passage 122 is located within the second boss 125. The end of the second boss 125 corresponds to a first blocking portion 123.

[0031] In some embodiments, the diameter of the second boss 125 is smaller than the inner diameter of the first boss 112, forming an annular gap between the outer wall of the second boss 125 and the inner wall of the first boss 112. In other words, the width of the connecting groove 124 is greater than the width of the first boss 112. This gap not only provides a passage for airflow but also allows the venting channel 122 to be designed as a straight structure, significantly reducing flow resistance. Airflow can smoothly enter the venting channel 122 through this annular gap, achieving pressure relief.

[0032] Furthermore, for manufacturing considerations, the sliding channel 121 and the air intake channel 111 are arranged along the axial direction of the valve body 1, and the venting channel 122 is perpendicular to the sliding channel 121. This arrangement not only facilitates drilling and reduces manufacturing complexity, but also improves the positional accuracy of the hole system and the manufacturability of the overall valve body 1.

[0033] In some embodiments, a sealing ring 13 is provided within the connecting groove 124 to ensure sealing. This sealing ring 13 effectively prevents gas leakage from the threaded connection gap, ensuring stable system operation under high pressure conditions. Simultaneously, the design of the sealing structure enhances the overall pressure resistance and reliability of the valve body 1.

[0034] In some embodiments, the valve seat 11 is provided with a second blocking part 113 to prevent the top core 2 from moving out of the sliding channel 121 near the intake channel 111. This is equivalent to having a step on the side of the intake channel 111 near the exhaust channel 21, the diameter of which is smaller than the diameter of the limiting part 23. When the air-blocking structure 3 presses the top core 2 into the intake channel 111, the limiting part 23 is blocked by the step, thereby mechanically limiting the inward movement of the top core 2 and ensuring that the stroke range of the top core 2 is between the first blocking part 123 and the second blocking part 113, maintaining the normal operating state of the valve.

[0035] In some embodiments, the second blocking portion 113 divides the air intake passage 111 into a first section and a second section. The flow cross-section of the second section gradually increases from the side closer to the first section to the side farther away from the first section, forming a gradually expanding structure. This structure not only helps to reduce airflow resistance and improve the flow characteristics of the medium, but also facilitates the alignment and connection of the valve body 1 with the external pipeline, improving assembly convenience and sealing effect. Similarly, the side of the valve cover 12 away from the valve seat 11 also adopts a conical or gradually expanding shape with a smaller top and a larger bottom. The internal shape of the air-blocking structure 3 matches the top shape of the valve cover 12, enabling them to be quickly positioned and tightly fitted during assembly, thereby simplifying the installation process and enhancing the overall structural coordination and connection reliability.

[0036] In some embodiments, the air-blocking structure 3 includes a plug 31 and a nut 32. The plug 31 is used to directly block the exhaust passage 21 to achieve a sealing function. The nut 32 is threadedly connected to the valve body 1, pressing and fixing the plug 31 in a designated position. This structure not only ensures reliable sealing of the exhaust passage 21 under normal operating conditions, but also facilitates disassembly and maintenance, improving the practicality and ease of operation of the valve body 1. One end of the plug 31 passes through the nut 32. A groove is provided on the outer wall of the plug 31, in which an anti-loss rope can be installed. The groove is located outside the nut 32, and the plug 31 and the nut 32 are connected to the pipe or valve body 1 by the anti-loss rope, preventing the air-blocking structure 3 from being lost when the plug 31 is disassembled.

[0037] When a new pipeline needs to be connected, the air-blocking structure 3 is opened, and the connector of the new pipeline is connected to the valve cover 12. The connector presses the top core 2 in, and the airflow enters the exhaust channel 21 from the air intake channel 111 through the airflow hole 22, and then enters the newly connected pipeline.

[0038] The above embodiments are merely illustrative of the principles and effects of this utility model and are not intended to limit the scope of this utility model. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of this utility model. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in this utility model should still be covered by the claims of this utility model.

Claims

1. A safety pressure relief valve, characterized in that, include: The valve body is provided with an air inlet channel, a sliding channel and an air venting channel. One end of the air venting channel is connected to the air inlet channel and the other end of the air venting channel is connected to the sliding channel. The top core is slidably installed within the sliding channel, and an exhaust channel is provided inside the top core. The outer diameter of the top core matches the inner diameter of the sliding channel. At least one airflow hole is provided on the side wall of the top core. The end of the top core near the air inlet channel is closed, and a limiting part is provided on the outer wall of the top core. A first blocking part is provided inside the valve body to prevent the top core from moving out. The diameter of the venting channel is smaller than the diameter of the exhaust channel. An air-blocking structure is used to block the exhaust passage and prevent gas from being discharged through the exhaust passage.

2. The safety relief valve according to claim 1, characterized in that: The valve body includes a valve cover and a valve seat. The air inlet channel is disposed in the valve seat. The sliding channel and the venting channel are both disposed in the valve cover. The air-blocking structure is connected to the valve cover.

3. The safety relief valve according to claim 2, characterized in that: The valve seat extends toward the valve cover and has a first protrusion. The valve cover has a connecting groove at one end near the valve seat that connects to the first protrusion. A second protrusion is provided inside the connecting groove, and the venting channel is located inside the second protrusion.

4. The safety relief valve according to claim 3, characterized in that: The diameter of the second boss is smaller than the inner diameter of the first boss.

5. The safety relief valve according to claim 4, characterized in that: The sliding channel and the air intake channel are arranged along the axial direction of the valve body, and the air venting channel is arranged perpendicular to the sliding channel.

6. The safety relief valve according to claim 3, characterized in that: A sealing ring is provided inside the connecting groove.

7. The safety relief valve according to claim 2, characterized in that: The valve seat is provided with a second blocking part to prevent the top core from moving out of the sliding channel near the air intake channel.

8. The safety relief valve according to claim 7, characterized in that: The second blocking part divides the air intake channel into a first section and a second section, and the flow cross section of the second section gradually increases from the side closer to the first section to the side farther away from the first section.

9. The safety relief valve according to claim 1, characterized in that: The limiting part is a baffle that closes the end of the top core, and the diameter of the baffle is larger than the inner diameter of the exhaust channel.

10. The safety relief valve according to claim 1, characterized in that: The air-blocking structure includes a plug and a nut. The plug is used to block the exhaust passage, and the nut is connected to the valve body to fix the plug.

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