A micro-positive pressure inert gas protection device

Abstract

This utility model discloses a micro-positive pressure inert gas protection device, relating to the field of material conveying and storage technology. It includes a buffer tank, a venting pipe and an isobaric connecting pipe disposed at the top of the buffer tank and connected to the buffer tank, an inlet and an outlet respectively disposed at the top and bottom of the buffer tank, and a displacement pipe and a micro-positive pressure pipe disposed on the side wall near the bottom of the buffer tank and connected to the buffer tank. The displacement pipe extends into the interior of the buffer tank, but its extension line does not intersect the center of the buffer tank. By extending the displacement pipe into the interior of the buffer tank without intersecting the center of the buffer tank, when inert gas is introduced into the buffer tank through the displacement pipe, the inert gas is blown to the inner side wall of the buffer tank. Guided by the inner side wall, the inert gas forms a cyclone circulation, thereby efficiently displacing the internal air without dead zones.

Description

Technical Field

[0001] This utility model relates to the field of material conveying and storage technology, specifically to a micro-positive pressure inert gas protection device. Background Technology

[0002] In the conveying, storage, and processing of hazardous chemicals and powders requiring inert gas protection, micro-positive pressure inert gas protection devices are used to temporarily store and isolate the powders. During temporary storage, the gas inside the protection device needs to be replaced with inert gas to ensure better powder storage. In existing technologies, due to insufficient training or complacency among operators, inert gas replacement is often not completed before feeding, or the protective gas pipeline is not properly connected, leading to the destruction of the inertization environment and causing flash explosion accidents. Alternatively, existing protection devices may have dead zones during gas replacement, reducing replacement efficiency.

[0003] Therefore, the development and design of micro-positive pressure inert gas protection devices to ensure uniform distribution of inert gas, avoid local dead zones, and improve replacement efficiency are technical problems that urgently need to be solved by those skilled in the art. Utility Model Content

[0004] To address the aforementioned issues, this invention provides a micro-positive pressure inert gas protection device that ensures uniform distribution of inert gas, avoids local dead zones, and improves replacement efficiency.

[0005] To achieve the above objectives, this utility model provides the following solution:

[0006] A micro-positive pressure inert gas protection device includes a buffer tank, a venting pipeline and an isobaric connecting pipeline disposed at the top of the buffer tank and communicating with the buffer tank, an inlet and an outlet disposed at the top and bottom of the buffer tank respectively, and a displacement pipeline and a micro-positive pressure pipeline disposed on the side wall of the buffer tank near the bottom and communicating with the buffer tank. The displacement pipeline extends into the interior of the buffer tank and the extension line does not intersect with the center of the buffer tank.

[0007] Preferably, the lower end of the buffer tank is a conical structure, and both the displacement pipeline and the micro-positive pressure pipeline extend into the interior of the conical structure, and the extension line of the micro-positive pressure pipeline does not intersect with the center of the conical structure.

[0008] Preferably, the inner wall of the buffer tank is provided with a spiral guide groove for guiding the inert gas, and the outlets of the displacement pipeline and the micro positive pressure pipeline are positioned opposite to most of the spiral guide grooves.

[0009] Preferably, the venting pipeline, the isobaric connecting pipeline, the displacement pipeline, and the micro-positive pressure pipeline are all equipped with manual ball valves; the venting pipeline, the displacement pipeline, and the micro-positive pressure pipeline are all equipped with solenoid valves; the isobaric connecting pipeline is equipped with a pneumatic ball valve; the venting pipeline and the micro-positive pressure pipeline are also equipped with a first quick-connect plug for connecting to an air source; and the isobaric connecting pipeline is equipped with a second quick-connect plug for connecting to the previous stage discharge device.

[0010] Preferably, a pneumatic ball valve for feeding and a pneumatic ball valve for discharging are respectively provided at the inlet and outlet.

[0011] Preferably, the feed pneumatic ball valve is connected to the feed port via a feed port flange, and the discharge pneumatic ball valve is connected to the discharge port via a discharge port flange. A feed sealing ring is provided between the feed port flange and the feed pneumatic ball valve, and a sealing disc is provided between the discharge port flange and the discharge pneumatic ball valve. A discharge sealing ring is provided inside the sealing disc.

[0012] Preferably, a sensor for monitoring the internal pressure of the buffer tank is provided on the top of the buffer tank.

[0013] Preferably, the system further includes an intelligent monitoring system, which is electrically connected to the sensor.

[0014] The present invention achieves the following technical advantages over the prior art:

[0015] By extending the displacement pipeline into the buffer tank without intersecting its center, inert gas is introduced into the buffer tank through the displacement pipeline. The inert gas is then blown to the inner wall of the buffer tank and guided by the inner wall. Since the venting pipeline is located at the top, the inert gas forms a cyclone circulation along the inner wall of the buffer tank from bottom to top, thus efficiently displacing the internal air without dead zones. This allows the air to be discharged through the venting pipeline, preventing the inert gas from being directly introduced into the buffer tank. Due to the lower pressure at the venting pipeline, the inert gas would be directly discharged from the venting pipeline, creating displacement dead zones. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in this utility model or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Appendix Figure 1 This is a schematic diagram of the overall structure of the micro-positive pressure inert gas protection device disclosed in this utility model;

[0018] Appendix Figure 2 This is a top view structural schematic diagram of the micro-positive pressure inert gas protection device disclosed in this utility model;

[0019] Appendix Figure 3 The micro-positive pressure inert gas protection device disclosed in this utility model is attached Figure 1 Enlarged structural diagrams of sections I and II;

[0020] The components are as follows: 1. Buffer tank; 2. First quick connector; 3. Solenoid valve; 4. Manual ball valve; 5. Replacement pipeline; 6. Conical structure; 7. Discharge port flange; 8. Sealing disc; 9. Discharge pneumatic ball valve; 10. Discharge port; 11. Micro-positive pressure pipeline; 12. Second quick connector; 13. Pneumatic ball valve; 14. Equal pressure connecting pipeline; 15. Inlet; 16. Inlet flange; 17. Inlet pneumatic ball valve; 18. Sensor; 19. Clamp; 20. KF pipe fitting; 21. Vent pipeline; 22. Top plate; 23. Inlet sealing ring; 24. Discharge sealing ring. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0022] The purpose of this invention is to provide a micro-positive pressure inert gas protection device to ensure uniform distribution of inert gas, avoid local dead zones, and improve replacement efficiency.

[0023] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0024] refer to Figure 1 and Figure 2The micro-positive pressure inert gas protection device disclosed in this embodiment of the present invention includes at least a buffer tank 1. The top of the buffer tank 1 is provided with a vent pipe 21 and an equal pressure connecting pipe 14. Both the vent pipe 21 and the equal pressure connecting pipe 14 are connected to the buffer tank 1. The vent pipe 21 is used to vent the air in the buffer tank 1. The equal pressure connecting pipe 14 is used to connect to the first-level equipment so that the pressure in the buffer tank 1 is equal to the pressure of the first-level equipment, which facilitates the delivery of materials into the buffer tank 1. The side wall of the buffer tank 1 near the bottom is provided with a displacement pipe 5 and a micro-positive pressure pipe 11 connected to the buffer tank 1. The displacement pipe 5 extends into the interior of the buffer tank 1, and the extension line does not intersect with the center of the buffer tank 1. The displacement pipe 5 is used to introduce inert gas into the buffer tank 1 to replace the air in the buffer tank 1. The micro-positive pressure pipe 11 is used to introduce inert gas into the buffer tank 1 to maintain a micro-positive pressure state in the buffer tank 1.

[0025] In this embodiment, by extending the displacement pipe 5 into the interior of the buffer tank 1, and ensuring that the extension line does not intersect the center of the buffer tank 1, when the inert gas is introduced into the buffer tank 1 through the displacement pipe 5, the inert gas will be blown to the inner wall of the buffer tank 1. Guided by the inner wall, and because the vent pipe 21 is located at the top, it can be ensured that the inert gas forms a cyclone circulation along the inner wall of the buffer tank 1 from bottom to top, thereby efficiently displacing the internal air without dead zones, allowing the air to be discharged through the vent pipe 21, and preventing the inert gas from being directly introduced into the buffer tank 1. Because the pressure at the vent pipe 21 is relatively low, the inert gas will be directly discharged from the vent pipe 21, resulting in the problem of displacement dead zones.

[0026] It should be noted that the buffer tank 1 has a cylindrical structure, and after the displacement pipe 5 extends into the buffer tank 1, the extension direction of the displacement pipe 5 is parallel to the tangential direction of the inner wall of the buffer tank 1, which improves the guiding effect of the inner wall of the buffer tank 1 on the inert gas.

[0027] refer to Figures 1-3 In one embodiment, the lower end of the buffer tank 1 is a conical structure 6, and the micro-positive pressure pipeline 11 extends into the interior of the conical structure 6 and the extension line does not intersect with the center of the conical structure 6. Setting the lower end of the buffer tank 1 as a conical structure 6 can ensure the discharge efficiency.

[0028] refer to Figures 1-3 In one embodiment, the inner wall of the buffer tank 1 is provided with a spiral guide groove for guiding the inert gas, and the outlets of the replacement pipeline 5 and the micro positive pressure pipeline 11 are directly opposite to the spiral guide grooves, so that after the inert gas is blown to the guide grooves, the inert gas will spiral upward through the guiding effect of the guide grooves, thereby further improving the replacement efficiency.

[0029] refer to Figures 1-3As one implementation method, manual ball valves 4 are installed on the venting pipeline 21, the equal pressure connecting pipeline 14, the displacement pipeline 5, and the micro positive pressure pipeline 11. Solenoid valves 3 are installed on the venting pipeline 21, the displacement pipeline 5, and the micro positive pressure pipeline 11. A pneumatic ball valve 13 is installed on the equal pressure connecting pipeline 14. The manual ball valves 4 are used to handle temporary emergency situations. The pneumatic ball valves 13 and the solenoid valves 3 are electrically connected to the intelligent control system to ensure intelligent control of each pipeline. The venting pipeline 21 and the micro positive pressure pipeline 11 are also equipped with a first quick plug 2 for connecting to the air source. The equal pressure connecting pipeline 14 is equipped with a second quick plug 12 for connecting to the previous stage discharge device. By setting the first quick plug 2 and the second quick plug 12, the disassembly and assembly of each pipeline can be convenient.

[0030] refer to Figure 1 and Figure 2 As a preferred method, a pneumatic ball valve 17 for feeding and a pneumatic ball valve 9 for discharging are respectively installed at the inlet 15 and the outlet 10. The pneumatic ball valve 17 for feeding and the pneumatic ball valve 9 for discharging are electrically connected to the intelligent control system. By setting the pneumatic ball valve 17 for feeding and the pneumatic ball valve 9 for discharging, automated control during feeding and discharging can be ensured.

[0031] refer to Figures 1-3 As a preferred embodiment, the feed pneumatic ball valve 17 is connected to the feed inlet 15 via the feed inlet flange 16, and the discharge pneumatic ball valve 9 is connected to the discharge outlet 10 via the discharge outlet flange 7. A feed sealing ring 23 is provided between the feed inlet flange 16 and the feed pneumatic ball valve 17. The feed sealing ring 23 is limited by a sealing groove provided on the feed inlet flange 16. A sealing disc 8 is provided between the discharge outlet flange 7 and the discharge pneumatic ball valve 9. A sealing groove is provided in the sealing disc 8 to place the discharge sealing ring 24, which can ensure the sealing effect of the entire device.

[0032] refer to Figure 1 and Figure 2 As one implementation method, a sensor 18 for monitoring the internal pressure of the buffer tank 1 is installed on the top of the buffer tank 1. By setting the sensor 18, the pressure inside the buffer tank 1 can be monitored online in real time throughout the entire feeding, discharging and replacement process, thereby achieving the purpose of protecting the material.

[0033] It should be noted that the sensor 18, the feed port 15, the venting pipe 21 and the isobaric connecting pipe 14 are all installed on the top plate 22 located on the top of the buffer tank 1. The top plate 22 is equipped with a kf pipe connector 20, and the sensor 18 is installed on the kf pipe connector 20. The kf pipe connector 20 and the sensor 18 are connected and fixed by a clamp 19.

[0034] refer to Figure 1 and Figure 2As one implementation method, there is also an intelligent monitoring system, which is electrically connected to sensor 18.

[0035] This utility model includes the following steps:

[0036] Close the inlet 15 and outlet 10, open the venting pipe 21 and the displacement pipe 5, and introduce inert gas into the buffer tank 1 through the displacement pipe 5 to replace the gas.

[0037] After the replacement is completed, close the venting pipeline 21 and the replacement pipeline 5, and open the isobaric connection pipeline 14 to connect the buffer tank 1 with the upstream equipment to form an isobaric cavity;

[0038] Open the feed inlet 15, and the material is conveyed from the previous stage equipment to the buffer tank 1;

[0039] After feeding is completed, close the feed port 15 and the isobaric connecting pipeline 14, open the micro-positive pressure pipeline 11, maintain the micro-positive pressure environment inside the buffer tank 1, and realize the micro-positive pressure storage of materials.

[0040] When material needs to be discharged, keep the micro-positive pressure pipeline 11 open, open the discharge port 10, and complete the material discharge.

[0041] The working principle of this embodiment is as follows: Before feeding, all manual ball valves 4 of the micro-positive pressure side-swirling inert gas protection device are in the open state for temporary emergency handling. The feeding pneumatic ball valve 17 and the discharging pneumatic ball valve 9 are both in the closed state. The solenoid valve 3 at the venting pipeline 21 is opened by the signal sent by the intelligent control system, and the solenoid valve 3 at the venting pipeline 21 is used for venting and exhausting. The solenoid valve 3 at the replacement pipeline 5 is opened, connecting to the external inert gas pipeline or gas tank, for replacing the internal gas with inert gas. Since the replacement pipeline 5 is parallel to the tangent of the side wall near the bottom of the buffer tank 1, the inert gas enters the interior of the buffer tank 1 to form a cyclone circulation, thereby efficiently replacing the internal air and discharging it through the venting pipeline 21. After the replacement is completed, the solenoid valve 3 of the venting pipeline 21 is closed, and the solenoid valve 3 at the replacement pipeline 5 is opened. When the solenoid valve 3 is closed, the pneumatic ball valve 13 of the isobaric connecting pipeline 14 is opened, connecting with the previous stage equipment to form an isobaric cavity, preparing for smooth feeding. The feeding pneumatic ball valve 17 is opened, and the material falls into the buffer tank 1 under gravity. After the quantitative feeding is completed, the feeding pneumatic ball valve 17 is closed. The solenoid valve 3 of the micro-positive pressure pipeline 11 is opened, introducing inert gas from the external micro-positive pressure pipeline 11 or the air tank to maintain the micro-positive pressure environment inside the buffer tank 1, realizing the micro-positive pressure storage of the material. During the discharge operation, the discharge pneumatic ball valve 9 is opened, and the solenoid valve 3 of the micro-positive pressure pipeline 11 remains open to maintain the micro-positive pressure environment. After the discharge is completed, the discharge pneumatic ball valve 9 is closed, and the solenoid valve 3 of the micro-positive pressure pipeline 11 is closed. Throughout the process, the sensor 18 monitors the pressure inside the housing in real time online. The above constitutes one working cycle.

[0042] It should be noted that, for those skilled in the art, it is obvious that this utility model is not limited to the details of the above exemplary embodiments, and that this utility model can be implemented in other specific forms without departing from the spirit or essential characteristics of this utility model. Therefore, the embodiments should be considered as exemplary and non-limiting in all respects, and the scope of this utility model is defined by the appended claims rather than the foregoing description. Therefore, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within the utility model. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A slightly positive pressure inert gas protection device, characterized in that, It includes a buffer tank, a venting pipe and an isobaric connecting pipe disposed on the top of the buffer tank and connected to the buffer tank, an inlet and an outlet disposed on the top and bottom of the buffer tank respectively, and a displacement pipe and a micro-positive pressure pipe disposed on the side wall of the buffer tank near the bottom and connected to the buffer tank. The displacement pipe extends into the interior of the buffer tank and the extension line does not intersect the center of the buffer tank.

2. The micro-positive pressure inert gas protection device according to claim 1, characterized in that, The lower end of the buffer tank is a conical structure. Both the displacement pipeline and the micro-positive pressure pipeline extend into the interior of the conical structure, and the extension line of the micro-positive pressure pipeline does not intersect with the center of the conical structure.

3. The micro-positive pressure inert gas protection device according to claim 2, characterized in that, The inner wall of the buffer tank is provided with spiral guide grooves for guiding inert gas, and the outlets of the displacement pipeline and the micro positive pressure pipeline are positioned directly opposite the spiral guide grooves.

4. The micro-positive pressure inert gas protection device according to claim 1, characterized in that, The venting pipeline, the isobaric connecting pipeline, the displacement pipeline, and the micro-positive pressure pipeline are all equipped with manual ball valves. The venting pipeline, the displacement pipeline, and the micro-positive pressure pipeline are all equipped with solenoid valves. The isobaric connecting pipeline is equipped with a pneumatic ball valve. The venting pipeline and the micro-positive pressure pipeline are also equipped with a first quick-connect plug for connecting to an air source. The isobaric connecting pipeline is equipped with a second quick-connect plug for connecting to the previous stage discharge device.

5. The micro-positive pressure inert gas protection device according to claim 1, characterized in that, The feed inlet and the discharge outlet are respectively equipped with a feed pneumatic ball valve and a discharge pneumatic ball valve.

6. The micro-positive pressure inert gas protection device according to claim 5, characterized in that, The feed pneumatic ball valve is connected to the feed port via a feed port flange, and the discharge pneumatic ball valve is connected to the discharge port via a discharge port flange. A feed sealing ring is provided between the feed port flange and the feed pneumatic ball valve, and a sealing disc is provided between the discharge port flange and the discharge pneumatic ball valve. A discharge sealing ring is provided inside the sealing disc.

7. The micro-positive pressure inert gas protection device according to claim 1, characterized in that, The top of the buffer tank is equipped with a sensor for monitoring the internal pressure of the buffer tank.

8. The micro-positive pressure inert gas protection device according to claim 7, characterized in that, It also includes an intelligent monitoring system, which is electrically connected to the sensor.

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