Nitrogen-sealed anti-explosion oil tank

Abstract

The utility model discloses a nitrogen-sealed anti-explosion oil tank which comprises an oil tank body, a nitrogen-sealed valve is installed at one end of the oil tank body, an air inlet pipe and an air outlet pipe are installed on the side face of the nitrogen-sealed valve, a limiting mechanism is arranged at the bottom of the nitrogen-sealed valve and comprises a connecting pipe installed at one end of the nitrogen-sealed valve, and an installation ring is installed on the side face of the connecting pipe. A threaded sleeve is mounted at one end of the mounting ring; by arranging the mounting ring, the threaded sleeve and the like, when the nitrogen-sealed valve needs to be mounted, a connecting pipe at the bottom of the nitrogen-sealed valve and the threaded sleeve are connected to a threaded groove of the mounting ring in a threaded mode for fixing, when the mounting ring is rotated, an operator pulls two limiting blocks to slide in limiting grooves, a plurality of second springs are compressed, and the nitrogen-sealed valve is fixed. And after the connecting pipe and the mounting ring are in threaded connection, the limiting block is loosened, so that the second spring rebounds, one end of the limiting block is driven to be clamped into the limiting groove of the mounting ring, the position of the mounting ring is fixed, the mounting ring cannot rotate, and then the limiting effect is achieved.

Description

A nitrogen-sealed explosion-proof oil tank Technical Field

[0001] This utility model relates to the field of nitrogen-sealed oil tank technology, specifically a nitrogen-sealed explosion-proof oil tank. Background Technology

[0002] Nitrogen-sealed explosion-proof oil tanks are devices specifically designed for storing flammable liquids. Their core function is to ensure a safe environment inside the tank through nitrogen sealing technology, preventing explosions and fires. The design of these tanks is based on the inert properties of nitrogen. Nitrogen replaces the air inside the tank, reducing the oxygen concentration to a safe level. During refueling, as the refueling machine pumps oil out, nitrogen from the nitrogen generator rushes into the oil, using nitrogen to isolate it from oxygen, thus eliminating the possibility of flammable liquid vapors coming into contact with oxygen and achieving the effect of explosion-proof and fire-proofing.

[0003] Patent CN220488396U discloses a nitrogen sealing valve, including a nitrogen sealing valve body. An outlet is fixedly connected to the right end of the nitrogen sealing valve body. A second connecting plate is fixedly connected to the side surface of the outlet. A first annular plate and a second annular plate are fixedly connected to the right surface of the second connecting plate. The outer diameter of the second annular plate is smaller than the inner diameter of the first annular plate, and the inner diameter of the second annular plate is larger than the outer diameter of the outlet. An outlet pipe is provided on the right side of the outlet, and the inner diameter of the outlet pipe is equal to the inner diameter of the outlet. A third annular plate is fixedly connected to the left surface of the outlet pipe, and the outer diameter of the third annular plate is equal to the inner diameter of the first annular plate, and the inner diameter of the third annular plate is equal to the outer diameter of the second annular plate. This device can filter the gas discharged from the nitrogen sealing valve, prevent the leakage of harmful substances in the storage tank, and improve the practicality of operation. When connecting the nitrogen valve pipe, a threaded connection is usually used. The advantages of threaded connection are simple structure, convenient installation, and a certain degree of sealing performance. However, threaded connection may loosen during long-term use, resulting in an untight connection. Therefore, a nitrogen-sealed explosion-proof oil tank is needed to meet people's needs. Summary of the Invention

[0004] The purpose of this invention is to provide a nitrogen-sealed explosion-proof oil tank to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a nitrogen-sealed explosion-proof oil tank, comprising an oil tank body, a nitrogen sealing valve installed at one end of the oil tank body, an inlet pipe and an outlet pipe installed on the side of the nitrogen sealing valve, and a limiting mechanism provided at the bottom of the nitrogen sealing valve;

[0006] Preferably, the limiting mechanism includes a connecting pipe installed at one end of the nitrogen sealing valve, an installation ring installed on the side of the connecting pipe, a threaded sleeve installed at one end of the installation ring, a threaded groove opened in the connecting pipe, a symmetrical limiting groove opened at one end of the installation ring, a limiting block installed in the limiting groove, two guide posts installed at one end of the limiting groove, a second spring sleeved on the side of the guide posts, and two sliding grooves opened in the limiting block.

[0007] Preferably, a first flange is installed at one end of the air inlet pipe, a second flange is installed at one end of the air outlet pipe, and an adjustment chamber is installed at one end of the nitrogen sealing valve.

[0008] Preferably, a slide rod is installed inside the nitrogen sealing valve, a connecting plate is installed on the side of the slide rod, a first spring is installed at one end of the connecting plate, a sealing plate is installed at the bottom of the slide rod, a connecting column is installed at one end of the sealing plate, a symmetrical movable rod is rotatably installed at one end of the connecting column, a diaphragm is installed at one end of the movable rod, and the diaphragm is connected to the inner wall of the regulating cavity.

[0009] Preferably, one end of the second spring is mounted on the limiting block, and the other end of the second spring is mounted on the limiting groove.

[0010] Preferably, the limiting block is slidably installed in the limiting groove, and the guide post is adapted to the groove.

[0011] Preferably, one end of the first spring is mounted on the inner wall of the nitrogen sealing valve, and a sealing ring is mounted on the side of the sealing disc.

[0012] Preferably, one end of the connecting pipe and the vent pipe is connected to the main body of the oil tank.

[0013] Compared with the prior art, the beneficial effects of this utility model are:

[0014] (1) By setting up an installation ring and a threaded sleeve, when the nitrogen sealing valve needs to be installed, the connecting pipe at the bottom of the nitrogen sealing valve and the threaded sleeve are threadedly connected to the threaded groove of the installation ring for fixation. When the installation ring is rotated, the operator pulls the two limit blocks to slide in the limit groove, and multiple second springs are compressed. The guide column slides into the slide groove. After the connecting pipe and the installation ring are threadedly connected, the limit blocks are released to allow the second springs to rebound, causing one end of the limit block to be inserted into the limit groove of the installation ring, fixing the position of the installation ring so that it cannot rotate, thereby achieving the effect of limiting.

[0015] (2) By setting up a sliding rod and connecting plate, when nitrogen needs to be supplied to the main body of the oil tank, nitrogen enters through the inlet pipe, squeezes the sealing plate, and drives the connecting plate to move in the nitrogen sealing valve. The first spring is compressed. When the sealing plate is squeezed to a certain extent, the obstruction to the outlet pipe is removed. At this time, the inlet pipe and the outlet pipe are connected. Nitrogen is supplied to the main body of the oil tank through the inlet pipe. One end of the movable rod is squeezed against the diaphragm. When enough nitrogen is supplied, the nitrogen squeezes the movable rod in the opposite direction through the diaphragm, thereby adjusting the sealing plate to return to its original position and blocking the supply of nitrogen. Attached Figure Description

[0016] Figure 1 is a three-dimensional structural diagram of a nitrogen-sealed explosion-proof oil tank proposed in this utility model;

[0017] Figure 2 is a cross-sectional structural diagram of the nitrogen sealing valve and connecting pipe of a nitrogen-sealed explosion-proof oil tank proposed in this utility model.

[0018] Figure 3 is a structural schematic diagram of the mounting ring and limiting groove of a nitrogen-sealed explosion-proof oil tank proposed in this utility model;

[0019] Figure 4 is an enlarged view of point A in Figure 2.

[0020] In the diagram: 1. Tank body; 2. Limiting mechanism; 3. Nitrogen sealing valve; 4. Inlet pipe; 5. First flange; 6. Outlet pipe; 7. Second flange; 8. Adjusting chamber; 9. Slide rod; 10. Connecting plate; 11. First spring; 12. Sealing plate; 13. Connecting column; 14. Movable rod; 15. Diaphragm; 21. Connecting pipe; 22. Mounting ring; 23. Threaded sleeve; 24. Threaded groove; 25. Limiting groove; 26. Limiting block; 27. Guide column; 28. Second spring; 29. ​​Slide groove. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. 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 of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0022] Example 1: Please refer to Figures 1-4. This utility model provides a technical solution: a nitrogen-sealed explosion-proof oil tank, including an oil tank body 1, a nitrogen sealing valve 3 installed at one end of the oil tank body 1, an inlet pipe 4 and an outlet pipe 6 installed on the side of the nitrogen sealing valve 3, and a limiting mechanism 2 provided at the bottom of the nitrogen sealing valve 3; the limiting mechanism 2 includes a connecting pipe 21 installed at one end of the nitrogen sealing valve 3, an installation ring 22 installed on the side of the connecting pipe 21, a threaded sleeve 23 installed at one end of the installation ring 22, and a threaded opening inside the connecting pipe 21. The groove 24 has a symmetrical limiting groove 25 at one end of the mounting ring 22. A limiting block 26 is installed in the limiting groove 25. Two guide posts 27 are installed at one end of the limiting groove 25. A second spring 28 is sleeved on the side of the guide post 27. Two sliding grooves 29 are opened in the limiting block 26. A first flange 5 is installed at one end of the air inlet pipe 4. A second flange 7 is installed at one end of the air outlet pipe 6. An adjusting chamber 8 is installed at one end of the nitrogen sealing valve 3. One end of the second spring 28 is installed on the limiting block 26. The other end of 8 is installed on the limiting groove 25, and the limiting block 26 is slidably installed in the limiting groove 25. The guide post 27 is adapted to the slide groove 29. When the nitrogen sealing valve 3 needs to be installed, it is fixed by installing the connecting pipe 21 and threaded sleeve 23 at the bottom of the nitrogen sealing valve 3 in the threaded groove 24 of the mounting ring 22. Rotating the mounting ring 22 drives the threaded sleeve 23 to rotate and connect with the threaded groove 24. At the same time as rotating, the operator pulls the two limiting blocks 26 to slide in the limiting groove 25, driving multiple second blocks 26 to slide in the limiting groove 25. When spring 28 is compressed, the limiting block 26 descends, causing the guide post 27 to slide into the groove 29. The guide post 27 prevents the second spring 28 from bending when compressed and limits the limiting block 26. After the connecting pipe 21 and the mounting ring 22 are threaded together, the limiting block 26 is released, causing the second spring 28 to rebound and causing one end of the limiting block 26 to engage in the limiting groove 25 of the mounting ring 22, fixing the position of the mounting ring 22 so that it cannot rotate, thus achieving the limiting effect and preventing loosening at the thread.

[0023] Example 2: As shown in Figures 1 and 2, a slide rod 9 is installed inside the nitrogen sealing valve 3. A connecting plate 10 is installed on the side of the slide rod 9. A first spring 11 is installed at one end of the connecting plate 10. A sealing plate 12 is installed at the bottom of the slide rod 9. A connecting column 13 is installed at one end of the sealing plate 12. A symmetrical movable rod 14 is rotatably installed at one end of the connecting column 13. A diaphragm 15 is installed at one end of the movable rod 14. The diaphragm 15 is connected to the inner wall of the regulating chamber 8. One end of the first spring 11 is installed on the inner wall of the nitrogen sealing valve 3. A sealing ring is installed on the side of the sealing plate 12. One end of the connecting pipe 21 and the gas outlet pipe 6 are connected to the oil tank body 1. When nitrogen needs to be introduced into the oil tank body 1, it is introduced into the nitrogen sealing valve 3 through the gas inlet pipe 4. The gas passes through... When the air inlet pipe 4 flows into the nitrogen sealing valve 3, it squeezes the sealing disc 12, causing one end of the slide rod 9 to slide, which in turn causes the connecting disc 10 to move and compress the first spring 11. The movable rod 14 at the bottom of the connecting column 13 rotates, and the movable rod 14 and the diaphragm 15 squeeze each other, causing the diaphragm 15 to deform to a certain extent. When the sealing disc 12 moves to the opening of the outlet pipe 6, the air inlet pipe 4 and the outlet pipe 6 are connected, and the gas is input into the oil tank body 1 through the outlet pipe 6. As the gas is continuously input, the nitrogen gas at the connecting pipe 21 is raised, which squeezes the diaphragm 15, causing the movable rod 14 to return to its original position, which in turn moves the sealing disc 12 back to its original position, cutting off the air inlet pipe 4 and the outlet pipe 6, and canceling the supply of nitrogen. The remaining features are the same as in Example 1.

[0024] The working principle is as follows: When the nitrogen sealing valve 3 needs to be installed, it is fixed by installing the connecting pipe 21 and threaded sleeve 23 at the bottom of the nitrogen sealing valve 3 into the threaded groove 24 of the mounting ring 22. Rotating the mounting ring 22 causes the threaded sleeve 23 to rotate and connect with the threaded groove 24. At the same time, the operator pulls the two limit blocks 26 to slide in the limit groove 25, which causes multiple second springs 28 to be compressed. The limit blocks 26 descend and cause the guide post 27 to slide into the slide groove 29. The guide post 27 prevents the second springs 28 from bending when compressed and limits the limit blocks 26. After the connecting pipe 21 and the mounting ring 22 are threadedly connected, the limit blocks 26 are released, causing the second springs 28 to rebound. This causes one end of the limit block 26 to be inserted into the limit groove 25 of the mounting ring 22, fixing the position of the mounting ring 22 and preventing it from rotating, thus achieving the effect of limiting the movement. To prevent loosening at the threads, when nitrogen needs to be introduced into the tank body 1, it is introduced into the nitrogen sealing valve 3 through the inlet pipe 4. When the gas flows into the nitrogen sealing valve 3 through the inlet pipe 4, it squeezes the sealing disc 12, causing one end of the slide rod 9 to slide, which in turn causes the connecting disc 10 to move and compress the first spring 11. The movable rod 14 at the bottom of the connecting column 13 rotates, and the movable rod 14 squeezes against the diaphragm 15, causing the diaphragm 15 to deform to a certain extent. When the sealing disc 12 moves to the opening of the outlet pipe 6, the inlet pipe 4 and the outlet pipe 6 are connected, and the gas is introduced into the tank body 1 through the outlet pipe 6. As the gas is continuously introduced, the nitrogen gas at the connecting pipe 21 rises, squeezing the diaphragm 15, causing the movable rod 14 to return to its original position, which in turn moves the sealing disc 12 back to its original position, cutting off the inlet pipe 4 and the outlet pipe 6, and canceling the supply of nitrogen.

Claims

1. A nitrogen-sealed explosion-proof oil tank, comprising a tank body (1), characterized in that: A nitrogen sealing valve (3) is installed at one end of the main body (1) of the oil tank. An air inlet pipe (4) and an air outlet pipe (6) are installed on the side of the nitrogen sealing valve (3). A limiting mechanism (2) is provided at the bottom of the nitrogen sealing valve (3). The limiting mechanism (2) includes a connecting pipe (21) installed at one end of the nitrogen sealing valve (3). An installation ring (22) is installed on the side of the connecting pipe (21). A threaded sleeve (23) is installed at one end of the installation ring (22). A threaded groove (24) is opened in the connecting pipe (21). A symmetrical limiting groove (25) is opened at one end of the installation ring (22). A limiting block (26) is installed in the limiting groove (25). Two guide posts (27) are installed at one end of the limiting groove (25). A second spring (28) is sleeved on the side of the guide post (27). Two sliding grooves (29) are opened in the limiting block (26).

2. The nitrogen-sealed explosion-proof oil tank according to claim 1, characterized in that: The intake pipe (4) is equipped with a first flange (5) at one end, the exhaust pipe (6) is equipped with a second flange (7) at one end, and the nitrogen sealing valve (3) is equipped with an adjustment chamber (8) at one end.

3. The nitrogen-sealed explosion-proof oil tank according to claim 1, characterized in that: The nitrogen sealing valve (3) is equipped with a slide rod (9), a connecting plate (10) is installed on the side of the slide rod (9), a first spring (11) is installed at one end of the connecting plate (10), a sealing plate (12) is installed at the bottom of the slide rod (9), a connecting column (13) is installed at one end of the sealing plate (12), a symmetrical movable rod (14) is rotatably installed at one end of the connecting column (13), a diaphragm (15) is installed at one end of the movable rod (14), and the diaphragm (15) is connected to the inner wall of the regulating cavity (8).

4. The nitrogen-sealed explosion-proof oil tank according to claim 1, characterized in that: One end of the second spring (28) is mounted on the limiting block (26), and the other end of the second spring (28) is mounted on the limiting groove (25).

5. The nitrogen-sealed explosion-proof oil tank according to claim 1, characterized in that: The limiting block (26) is slidably installed in the limiting groove (25), and the guide post (27) is adapted to the sliding groove (29).

6. A nitrogen-sealed explosion-proof oil tank according to claim 3, characterized in that: One end of the first spring (11) is mounted on the inner wall of the nitrogen sealing valve (3), and a sealing ring is mounted on the side of the sealing disc (12).

7. The nitrogen-sealed explosion-proof oil tank according to claim 1, characterized in that: One end of the connecting pipe (21) and the vent pipe (6) is connected to the main body of the oil tank (1).

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