Self-bleeding glass reinforced plastic storage tank

Abstract

The utility model relates to the technical field of glass steel storage tank, specifically relates to a glass steel storage tank of self pressure relief, a glass steel storage tank of self pressure relief, including tank body and tank cover, be equipped with feed inlet on the tank cover, the tank body bottom is equipped with the discharge gate, still be equipped with pressure relief subassembly on the tank cover, and the pressure relief subassembly includes positive pressure relief pipe and negative pressure relief pipe, and the inside of positive pressure relief pipe is equipped with positive regulation channel, and is equipped with positive pressure relief subassembly in positive regulation channel, and the inside of negative pressure relief pipe is equipped with negative regulation channel, and is equipped with negative pressure relief subassembly in negative regulation channel. Set up pressure relief subassembly on the tank cover, and the pressure relief subassembly with positive pressure relief pipe and negative pressure relief pipe can respectively carry out positive pressure relief through positive pressure relief pipeline when needing positive pressure (high pressure) too big, when being in excessive negative pressure state in the tank body, fill in air through negative pressure relief pipe and eliminate negative pressure environment, guarantee that tank body is stably used under normal pressure state, guarantee the service life of glass steel storage tank.

Description

Technical Field

[0001] This utility model relates to the field of fiberglass storage tank technology, specifically to a self-depressurizing fiberglass storage tank. Background Technology

[0002] Fiberglass vertical storage tanks, also known as vertical FRP storage tanks or vertical tanks, are cylindrical tanks placed vertically with a flat bottom that fits snugly against the ground. The top is either an elliptical or conical head. A common type is the large raw material storage tank used in chemical plants. The structure consists of an inner lining and an outer layer. The inner lining uses resin with appropriate corrosion resistance grades depending on the medium being stored, while the outer layer contains UV absorbers to resist UV oxidation and corrosion. When storing strong acids, due to the excellent sealing of the FRP tank, changes in ambient temperature can affect the pressure inside the tank. Higher ambient temperatures increase the intermolecular spacing in the stored solution, generating high pressure and compromising the safe storage of the FRP tank.

[0003] Patent application CN201920628933.3 discloses a chemical storage tank that facilitates pressure relief. The tank includes a tank body, a discharge valve installed at the bottom of the tank body, and a feed inlet installed at the top of the tank body. A pressure relief pipe is installed at the upper end of the tank body. An adjusting groove is formed on the inner side of the pressure relief pipe, and a pressure relief rod is installed on the inner side of the pressure relief pipe. A push rod is installed above a connecting spring, and an adjusting collar is installed on the outer side of the push rod. The adjusting collar is located inside the pressure relief pipe, and an actuating ring is installed on the outer side of the adjusting collar. A connecting tooth block is installed on the inner side of the actuating ring, and the actuating ring is connected to the adjusting collar through the connecting tooth block. This chemical storage tank facilitates pressure relief, allowing for automatic release of internal pressure through the pressure relief components inside the pressure relief pipe. This prevents the pressure from exceeding the tank's withstand limit and causing tank rupture, thus preventing leakage of chemical raw materials due to tank rupture. However, while this technical solution facilitates pressure relief, during the material extraction process of the FRP storage tank, if the vent or vent hole is blocked, negative pressure may be generated inside the tank, leading to internal suction damage. Therefore, keeping the vent hole open or maintaining normal pressure inside the tank to relieve negative pressure is also very important for the lifespan of the storage tank. Utility Model Content

[0004] This invention provides a self-releasing fiberglass storage tank, which facilitates the release of positive and negative pressure within the fiberglass storage tank, maintaining a normal pressure state inside the tank. This avoids the risk of explosion caused by excessive positive pressure and prevents damage to the tank structure caused by negative pressure, which could lead to leaks or other safety accidents and threaten the surrounding environment and personnel safety.

[0005] The above-mentioned technical objective of this utility model is achieved through the following technical solution: A self-relieving fiberglass storage tank includes a tank body and a tank cover. The tank cover is provided with an inlet, and the bottom of the tank body is provided with an outlet. The tank cover is also provided with a pressure relief assembly, which includes a positive pressure relief pipe and a negative pressure relief pipe. The positive pressure relief pipe has a positive adjustment channel inside, and a positive pressure relief assembly is provided in the positive adjustment channel. The positive pressure relief assembly includes a first sealing plate and a sealing ball. The positive adjustment channel includes a first pressure relief section and a second pressure relief section. The first pressure relief section is connected to a first hole, and the first sealing plate blocks the first hole. The cross-sectional area of ​​the first pressure relief section is larger than the cross-sectional area of ​​the first sealing plate. The connection between the second pressure relief section and the first pressure relief section is blocked by the sealing ball under normal pressure. The negative pressure relief pipe has a negative pressure relief assembly inside. The adjustment channel includes a negative pressure relief assembly comprising a second sealing plate, a third sealing plate, a second sealing rod, and a spring. The second sealing plate is located at the top of the second sealing rod, and the third sealing plate is located at the bottom of the second sealing rod. A vent plate is provided at the connection between the negative adjustment channel and the second hole. The spring is located between the vent plate and the third sealing plate. The negative adjustment channel has radially outwardly recessed upper and lower air inlet grooves. The upper air inlet groove forms an upper air inlet section, and the lower air inlet groove forms a lower air inlet section. The cross-sectional size of the upper air inlet section is larger than that of the second sealing plate, and the cross-sectional size of the lower air inlet section is smaller than that of the third sealing plate. In the negative pressure relief position, the second sealing plate is located in the upper air inlet section, and the third sealing plate is located in the lower air inlet section.

[0006] As a preferred embodiment of the present invention, the first pressure relief section includes an upper part and a lower part. The upper part is connected to the sealing ball, and the diameter of the upper part gradually increases in the direction away from the sealing ball. The lower part is connected to the first hole, and the diameter of the lower part gradually decreases in the direction towards the first hole.

[0007] As a preferred embodiment of the present invention, the upper part is provided with a baffle with a vent hole, and the positive pressure relief assembly further includes a first pressure relief rod. The first sealing plate is connected to the bottom of the first sealing plate, and when the top of the first pressure relief rod is connected to the baffle, the diameter of the first sealing plate is less than the inner diameter of the upper part at that height.

[0008] As a preferred embodiment of the present invention, the second pressure relief section is provided with a limiting pressure relief plate with a pressure relief hole, and the limiting pressure relief plate is located at the arc-shaped end of the second pressure relief section.

[0009] As a preferred embodiment of the present invention, a limiting ring is provided in the first hole, and the diameter of the limiting ring is smaller than the diameter of the first sealing plate.

[0010] As a preferred embodiment of the present invention, the maximum compression distance of the spring is less than the distance from the second sealing plate to the lowest point of the upper air inlet groove when the second sealing plate is in the normal pressure position.

[0011] As a preferred embodiment of the present invention, the lower air inlet groove is provided with a radially outwardly recessed limiting channel, and the third sealing plate is provided with a slider corresponding to the limiting channel, the slider being slidably connected to the limiting channel.

[0012] In summary, this utility model has the following beneficial effects.

[0013] 1. A pressure relief assembly is installed on the tank cover, which has a positive pressure relief pipe and a negative pressure relief pipe. When the positive pressure (high pressure) is too high, positive pressure can be relieved through the positive pressure relief pipe. When the tank is in an excessive negative pressure state, air can be introduced through the negative pressure relief pipe to eliminate the negative pressure environment, ensuring that the tank is used under a stable normal pressure state and ensuring the service life of the FRP storage tank.

[0014] 2. By setting the upper and lower shapes in the first pressure relief section, the high-pressure gas passes through the inclined surface of the upper part, and the gas is liquefied on the inclined surface. This can liquefy part of the gas into liquid and recycle it. This saves raw materials and also plays a role in partially relieving pressure during the liquefaction process.

[0015] 3. The first sealing plate, the second sealing plate, and the third sealing plate are set up in conjunction with the specific structure inside the positive adjustment channel and the negative adjustment channel to achieve a good sealing effect when normal storage is not required (i.e., when positive or negative pressure relief is not required). Attached Figure Description

[0016] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of 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] Figure 1 This is a schematic diagram of the external structure of a self-depressurizing fiberglass storage tank according to this utility model.

[0018] Figure 2 This is a cross-sectional schematic diagram of a self-depressurizing fiberglass storage tank according to the present invention.

[0019] Figure 3 for Figure 2 Enlarged view of details at point A (at this time, the pressure is not positive and is being released).

[0020] Figure 4 for Figure 2A magnified view of the details at point A (at which point the pressure is being released).

[0021] Figure 5 for Figure 2 Enlarged view of details at point B (at this time, the pressure is not negative and is being released).

[0022] Figure 6 for Figure 2 A magnified view of the details at point B (which is currently under negative pressure relief).

[0023] In the diagram: 1. Tank body, 2. Tank cover, 3. Inlet, 4. Outlet, 5. Positive pressure relief pipe, 6. Negative pressure relief pipe, 7. Positive adjustment channel, 8. First sealing plate, 9. Sealing ball, 10. First pressure relief section, 11. Second pressure relief section, 12. First hole, 13. Negative adjustment channel, 14. Second sealing plate, 15. Third sealing plate, 16. Second sealing rod, 17. Spring, 18. Upper air inlet groove, 19. Lower air inlet groove, 20. Upper air inlet, 21. Lower air inlet, 22. Upper part, 23. Lower part, 24. Baffle, 25. First pressure relief rod, 26. Limiting pressure relief plate, 27. Limiting ring, 28. Limiting channel, 29. Slider, 30. Vent plate, 31. Second hole. Detailed Implementation

[0024] The technical solutions in the embodiments of this utility model will be clearly explained below with reference to the accompanying drawings. It should be understood that the term "before and after" is only for the convenience of describing this utility model and simplifying the description, and does not indicate or imply that the device or component referred to must have a specific orientation, and therefore should not be construed as a limitation on the utility model.

[0025] Of course, those skilled in the art should understand that the term "a" should be understood as "at least one" or "one or more". That is, in one embodiment, the number of an element can be one, while in another embodiment, the number of the element can be multiple. The term "a" should not be understood as a limitation on the quantity.

[0026] See attached document Figure 1 To be continued Figure 6 As shown, a self-releasing fiberglass storage tank includes a tank body 1 and a tank cover 2. The tank cover 2 is provided with a feed inlet 3, and the bottom of the tank body 1 is provided with a discharge outlet 4. The tank cover 2 is also provided with a pressure relief assembly, which includes a positive pressure relief pipe 5 and a negative pressure relief pipe 6. The pressure relief assembly on the tank cover 2, with the positive pressure relief pipe 5 and the negative pressure relief pipe 6, can respectively relieve positive pressure through the positive pressure relief pipe 7 when the required positive pressure (high pressure) is too high, and when the tank body 1 is in an excessively negative pressure state, air is introduced through the negative pressure relief pipe 6 to eliminate the negative pressure environment, ensuring that the tank body 1 is stably used under normal pressure, thus ensuring the service life of the fiberglass storage tank.

[0027] See attached document Figure 2 To be continued Figure 4 As shown, both the positive pressure relief pipe 5 and the negative pressure relief pipe 6 are located around the feed inlet 3. The positive pressure relief pipe 5 has a positive adjustment channel 7 inside, and a positive pressure relief assembly is provided in the positive adjustment channel 7. The positive pressure relief assembly includes a first sealing plate 8 and a sealing ball 9. The positive adjustment channel 7 includes a first pressure relief section 10 and a second pressure relief section 11. The first pressure relief section 10 is connected to the first hole 12 on the tank cover 2. The first sealing plate 8 blocks the first hole 12. The cross-sectional area of ​​the first pressure relief section 10 is larger than the cross-sectional area of ​​the first sealing plate 8. The connection between the second pressure relief section 11 and the first pressure relief section 10 is blocked by the sealing ball 9 under normal pressure.

[0028] The first pressure relief section 10 includes an upper part 22 and a lower part 23. The upper part 22 is connected to the sealing ball 9, and its diameter gradually increases away from the sealing ball 9. The lower part 23 is connected to the first hole 12, and its diameter gradually decreases towards the first hole 12. By configuring the upper part 22 and the lower part 23 in the first pressure relief section 10, high-pressure gas liquefies on the inclined surface of the upper part 22, effectively liquefying part of the gas into a liquid for recycling. This saves raw materials and also provides partial pressure relief during the liquefaction process. Simultaneously, the inclined surface of the lower part 23 better guides the liquid, allowing the liquefied solution to flow back into the inner cavity of the tank 1 through the first hole 12.

[0029] The upper part 22 is provided with a baffle 24 with vent holes. The positive pressure relief assembly also includes a first pressure relief rod 25. A first sealing plate 8 is connected to the bottom of the first sealing plate 8. When the top of the first pressure relief rod 25 is connected to the baffle 24, the diameter of the first sealing plate is smaller than the inner diameter of the upper part 22 at that height. The first pressure relief rod 25 is provided to prevent the first sealing plate 8 from being pushed upward by excessive pressure. If the first sealing plate 8 moves too upward, it will collide with the upper part 22 and cause blockage, thus failing to effectively relieve positive pressure.

[0030] The second pressure relief section 11 is equipped with a limiting pressure relief plate 26 with a pressure relief hole, which is located at the arc-shaped end of the second pressure relief section 11. The limiting pressure relief plate 26 with the pressure relief hole, located at the arc-shaped end, ensures that the sealing ball 9, after being impacted by high pressure and floating upwards, connects the first pressure relief section 10 and the second pressure relief section 11, preventing the sealing ball 9 from moving excessively away after being impacted by high-pressure gas. The arc-shaped design of the second pressure relief section 11 also ensures that the sealing ball 9 can smoothly block the connection between the first pressure relief section 10 and the second pressure relief section 11 after pressure relief is completed.

[0031] A limiting ring 27 is provided in the first hole 12, and the diameter of the limiting ring 27 is smaller than the diameter of the first sealing plate 8.

[0032] See attached document Figure 4As shown, when the gas pressure inside tank 1 is too high, the strong gas pressure pushes the first sealing plate 8 upward. After the first sealing plate 8 gradually moves upward, it detaches from the tank cover 2 and enters the first pressure relief section 10. The gas in tank 1 enters the first pressure relief section 10. At this time, the gas pushes the sealing ball 9 upward. After the sealing ball 9 detaches from the connection between the first pressure relief section 10 and the second pressure relief section 11, the channel between the first pressure relief section 10 and the second pressure relief section 11 is opened. The gas enters the second pressure relief section 11 from the first pressure relief section 10 and finally releases pressure from the second pressure relief section 11. It is worth noting that according to the "Law of the People's Republic of China on the Prevention and Control of Atmospheric Pollution" and other relevant laws and regulations, the hydrochloric acid waste gas emitted by enterprises must meet the emission standards stipulated by the state or local regulations and cannot be directly discharged into the environment. The positive pressure relief pipe 5 needs to be connected to an external waste gas treatment device. The external waste gas treatment device is not shown in the attached drawings of this application. The waste gas treatment device is an existing product and can be selected by those skilled in the art based on actual production needs.

[0033] See attached document Figure 2 Appendix Figure 5 Appendix Figure 6 As shown, a negative pressure relief pipe 6 has a negative adjustment channel 13 inside, and a negative pressure relief assembly is provided in the negative adjustment channel 13. The negative pressure relief assembly includes a second sealing plate 14, a third sealing plate 15, a second sealing rod 16, and a spring 17. The second sealing plate 14 is located at the top of the second sealing rod 16, and the third sealing plate 15 is located at the bottom of the second sealing rod 16. A vent plate 30 is provided at the connection between the negative adjustment channel 13 and the second hole 31 on the tank body 1. A spring is provided between the vent plate 30 and the third sealing plate 15. 17. The negative adjustment channel 13 is provided with an upper air intake groove 18 and a lower air intake groove 19 that are radially recessed outward. The upper air intake groove 18 forms an upper air intake section 20, and the lower air intake groove 19 forms a lower air intake section 21. The cross-sectional size of the upper air intake section 20 is larger than the cross-sectional size of the second sealing plate 14, and the cross-sectional size of the lower air intake section 21 is smaller than the cross-sectional size of the third sealing plate 15. When the negative pressure is released, the second sealing plate 14 is in the upper air intake section 20, and the third sealing plate 15 is in the lower air intake section 21.

[0034] The maximum compression distance of spring 17 is less than the distance from the second sealing plate 14 to the lowest point of the upper air intake groove 18 when it is in the normal pressure position.

[0035] The lower air intake slot 19 is provided with a radially recessed limiting channel 28, and the third sealing plate 15 is provided with a slider 29 corresponding to the limiting channel 28. The slider 29 is slidably connected to the limiting channel 28.

[0036] See attached document Figure 6As shown, when the air pressure inside the tank 1 is too low and becomes negative pressure, the negative pressure applies suction to the third sealing plate 15, causing the third sealing plate 15 to move downwards and be in the lower air inlet 21. At the same time, the second sealing rod 16 drives the second sealing plate 14 to move downwards and be in the upper air inlet 20. External air enters the tank 1 through the negative adjustment channel 13, balancing the air pressure inside the tank 1.

[0037] The above description is merely a preferred embodiment of this utility model, but the scope of protection of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art under the technical guidance of this utility model should be included within the scope of protection of this utility model. Therefore, the scope of protection of this utility model should be determined by the scope of the claims.

Claims

1. A self-releasing fiberglass storage tank, comprising a tank body (1) and a tank cover (2), wherein the tank cover (2) is provided with a feed inlet (3) and the tank body (1) is provided with a discharge outlet (4), characterized in that, The can lid (2) is also provided with a pressure relief assembly, which includes a positive pressure relief pipe (5) and a negative pressure relief pipe (6). The positive pressure relief pipe (5) has a positive adjustment channel (7) inside. The positive adjustment channel (7) is provided with a positive pressure relief assembly, which includes a first sealing plate (8) and a sealing ball (9). The positive adjustment channel (7) includes a first pressure relief section (10) and a second pressure relief section (11). The first pressure relief section (10) is connected to the first hole (12). The first sealing plate (8) The first hole (12) is blocked. The cross-sectional area of ​​the first pressure relief section (10) is larger than that of the first sealing plate (8). The connection between the second pressure relief section (11) and the first pressure relief section (10) is blocked by the sealing ball (9) under normal pressure. The negative pressure relief pipe (6) is provided with a negative adjustment channel (13) inside. The negative adjustment channel (13) is provided with a negative pressure relief assembly. The negative pressure relief assembly includes a second sealing plate (14), a third sealing plate (15), and a second sealing plate (8). A sealing rod (16) and a spring (17) are provided. The second sealing plate (14) is located at the top of the second sealing rod (16), and the third sealing plate (15) is located at the bottom of the second sealing rod (16). A vent plate (30) is provided at the connection between the negative adjustment channel (13) and the second hole (31). The spring (17) is provided between the vent plate (30) and the third sealing plate (15). The negative adjustment channel (13) is provided with an upper air inlet groove (18) and a lower air inlet groove (19) that radiate outwards. 9) The upper air inlet groove (18) forms an upper air inlet (20), and the lower air inlet groove (19) forms a lower air inlet (21). The cross-sectional size of the upper air inlet (20) is larger than that of the second sealing plate (14), and the cross-sectional size of the lower air inlet (21) is smaller than that of the third sealing plate (15). When the negative pressure is released, the second sealing plate (14) is in the upper air inlet (20), and the third sealing plate (15) is in the lower air inlet (21).

2. The self-depressurizing fiberglass storage tank according to claim 1, characterized in that, The first pressure relief section (10) includes an upper part (22) and a lower part (23). The upper part (22) is connected to the sealing ball (9), and the diameter of the upper part (22) gradually increases in the direction away from the sealing ball (9). The lower part (23) is connected to the first hole (12), and the diameter of the lower part (23) gradually decreases in the direction towards the first hole (12).

3. A self-depressurizing fiberglass storage tank according to claim 2, characterized in that, The upper part (22) is provided with a baffle (24) with a vent hole. The positive pressure relief assembly also includes a first pressure relief rod (25). The first sealing plate (8) is connected to the bottom of the first sealing plate (8). When the top of the first pressure relief rod (25) is connected to the baffle (24), the diameter of the first sealing plate is less than the inner diameter of the upper part (22) at that height.

4. A self-depressurizing fiberglass storage tank according to claim 3, characterized in that, The second pressure relief section (11) is provided with a limiting pressure relief plate (26) with a pressure relief hole, and the limiting pressure relief plate (26) is located at the arc-shaped end of the second pressure relief section (11).

5. A self-depressurizing fiberglass storage tank according to claim 4, characterized in that, A limiting ring (27) is provided in the first hole (12), and the diameter of the limiting ring (27) is smaller than the diameter of the first sealing plate (8).

6. A self-depressurizing fiberglass storage tank according to claim 1, characterized in that, The maximum compression distance of the spring (17) is less than the distance from the second sealing plate (14) to the lowest point of the upper air inlet groove (18) when the second sealing plate (14) is in the normal pressure position.

7. A self-depressurizing fiberglass storage tank according to claim 1, characterized in that, The lower air intake groove (19) is provided with a radially outward recessed limiting groove (28), and the third sealing plate (15) is provided with a slider (29) corresponding to the limiting groove (28), and the slider (29) is slidably connected to the limiting groove (28).

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