Self-operated nitrogen sealing protection device for chemical product storage

Abstract

The utility model relates to a chemical product storage self-operated nitrogen sealing protection device which comprises a nitrogen tank, a chemical storage tank and a nitrogen recovery tank, and a nitrogen supply pipeline is communicated between the top of the nitrogen tank and the top of the chemical storage tank. A first self-operated nitrogen supply pressure regulating valve, a first nitrogen supply anti-reflux plugging device and a first flow meter are sequentially mounted on the nitrogen supply pipeline in the direction from the nitrogen tank to the chemical storage tank, a nitrogen discharge pipeline and a recycled nitrogen supply pipeline are communicated between the top of the chemical storage tank and the nitrogen recycling tank, and a nitrogen discharge regulating valve is arranged on the nitrogen discharge pipeline; and a second self-operated nitrogen supply pressure regulating valve, a second nitrogen supply anti-reflux plugging device and a second flowmeter are sequentially mounted on the recovery nitrogen supply pipeline in the direction from the nitrogen recovery tank to the chemical storage tank. The nitrogen discharging pipeline extends into the bottom in the nitrogen recycling tank, and the recycling nitrogen supply pipeline is connected to the lower end of the side wall of the nitrogen recycling tank. According to the nitrogen supply device, discharged nitrogen can be recycled, the cost is saved, nitrogen backflow of a nitrogen supply line can be prevented, the loss is reduced, and the safety is high.

Description

Technical Field

[0001] The utility model relates to the technical field of nitrogen sealing systems, in particular to a self-powered nitrogen sealing protection device for storing chemical products. Background Art

[0002] The nitrogen sealing device is a process device that fills the top space of the container with nitrogen. It is used to isolate and protect toxic, volatile, flammable and explosive media. It can prevent material oxidation, form explosive gases, reduce volatilization and waste, and is widely used in the storage of chemical products.

[0003] In the process of regulating and isolating nitrogen in the existing nitrogen sealing device, a certain amount of nitrogen is discharged by the nitrogen release valve and is rarely recycled, resulting in nitrogen waste and increased costs. In addition, nitrogen backflow may occur on the nitrogen supply pipeline, and leakage may occur due to poor sealing. Utility Model Content

[0004] The utility model aims to solve the deficiencies of the prior art and provides a self-powered nitrogen sealing protection device for storing chemical products.

[0005] In order to achieve the above-mentioned purpose, the utility model adopts the following technical solutions:

[0006] A self-operated nitrogen sealing protection device for storing chemical products comprises a nitrogen tank, a chemical storage tank and a nitrogen recovery tank. A nitrogen supply pipeline is connected between the top of the nitrogen tank and the top of the chemical storage tank. A first self-operated nitrogen supply pressure regulating valve, a first nitrogen supply backflow prevention blocking device and a first flow meter are sequentially installed on the nitrogen supply pipeline from the nitrogen tank to the chemical storage tank. A nitrogen exhaust pipeline and a nitrogen recovery supply pipeline are connected between the top of the chemical storage tank and the nitrogen recovery tank. A nitrogen exhaust regulating valve is arranged on the nitrogen exhaust pipeline. A second self-operated nitrogen supply pressure regulating valve, a second nitrogen supply backflow prevention blocking device and a second flow meter are sequentially installed on the nitrogen recovery supply pipeline from the nitrogen recovery tank to the chemical storage tank.

[0007] The nitrogen exhaust pipeline extends into the bottom of the nitrogen recovery tank, and the nitrogen recovery supply pipeline is connected to the lower end of the side wall of the nitrogen recovery tank.

[0008] A fire-retardant breathing valve is installed on the top of the chemical storage tank.

[0009] A feed pipe is provided at the lower end of one side wall of the chemical storage tank, and a discharge pipe is provided at the lower end of the other side wall. A feed valve is provided on the feed pipe, and a discharge valve is provided on the discharge pipe.

[0010] The nitrogen tank is provided with an opening and closing valve at the connection end of the nitrogen supply pipeline.

[0011] The beneficial effects of the utility model are as follows: the utility model can recycle the discharged nitrogen, thus saving costs, and can also prevent the nitrogen backflow in the nitrogen supply line, thus reducing losses and having high safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a schematic diagram of the structure of the utility model;

[0013] Figure 2 It is a structural schematic diagram of the first nitrogen supply backflow prevention and blocking device;

[0014] Figure 3 It is a structural schematic diagram of the second nitrogen supply backflow prevention plugging device;

[0015] In the figure: 1-nitrogen tank; 2-chemical storage tank; 3-nitrogen recovery tank; 4-nitrogen supply pipeline; 5-first self-operated nitrogen supply pressure regulating valve; 6-first nitrogen supply anti-backflow blocking device; 7-first flow meter; 8-nitrogen discharge pipeline; 9-recovery nitrogen supply pipeline; 10-nitrogen discharge regulating valve; 11-second self-operated nitrogen supply pressure regulating valve; 12-second nitrogen supply anti-backflow blocking device; 13-second flow meter; 14-flame-blocking breathing valve; 15-feeding pipe; 16-discharge pipe; 17-feeding valve; 18-discharge valve; 19-opening and closing valve;

[0016] 61-first blocking shell; 62-first connecting flange; 63-first clamping equal-diameter circular hole; 64-first enlarged truncated cone hole; 65-first supporting equal-diameter circular hole; 66-first sealing ball; 67-first tightening spring;

[0017] 121 - second blocking shell; 122 - second connecting flange; 123 - second clamping equal-diameter circular hole; 124 - second enlarged-diameter truncated cone hole; 125 - second supporting equal-diameter circular hole; 126 - second sealing ball; 127 - second tightening spring;

[0018] The following is a detailed description of the embodiments of the present invention with reference to the accompanying drawings. DETAILED DESCRIPTION

[0019] The principles and features of the present invention are described below in conjunction with the accompanying drawings. The examples given are only used to explain the present invention and are not used to limit the scope of the present invention. The present invention is described in more detail in the following paragraphs by way of example with reference to the accompanying drawings. The advantages and features of the present invention will become clearer according to the following description. It should be noted that the drawings are all in a very simplified form and are not in precise proportions, and are only used to conveniently and clearly assist in explaining the purpose of the embodiments of the present invention.

[0020] It should be noted that when a component is referred to as being "fixed to" another component, it may be directly on the other component or there may also be a component centered. When a component is considered to be "connected to" another component, it may be directly connected to the other component or there may also be a component centered. When a component is considered to be "set on" another component, it may be directly set on the other component or there may also be a component centered. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only.

[0021] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art in the technical field of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0022] The utility model is further described below in conjunction with the accompanying drawings and embodiments:

[0023] A self-powered nitrogen sealing protection device for storing chemical products, such as Figure 1 As shown, it includes a nitrogen tank 1, a chemical storage tank 2, a nitrogen recovery tank 3, a nitrogen supply pipeline 4, a first self-operated nitrogen supply pressure regulating valve 5, a first nitrogen supply anti-backflow blocking device 6, a first flow meter 7, a nitrogen exhaust pipeline 8, a recovery nitrogen supply pipeline 9, a nitrogen exhaust regulating valve 10, a second self-operated nitrogen supply pressure regulating valve 11, a second nitrogen supply anti-backflow blocking device 12, a second flow meter 13, a flame-blocking breathing valve 14, a feed pipe 15, a discharge pipe 16, a feed valve 17, a discharge valve 18 and an on-off valve 19.

[0024] A fire-retardant breathing valve 14 is provided on the top of the chemical storage tank 2.

[0025] A feed pipe 15 is provided at the lower end of one side wall of the chemical storage tank 2 , and a discharge pipe 16 is provided at the lower end of the other side wall. A feed valve 17 is provided on the feed pipe 15 , and a discharge valve 18 is provided on the discharge pipe 16 .

[0026] A nitrogen supply pipeline 4 is connected between the top of the nitrogen tank 1 and the top of the chemical storage tank 2. A first self-operated nitrogen supply pressure regulating valve 5, a first nitrogen supply anti-backflow blocking device 6 and a first flow meter 7 are installed on the nitrogen supply pipeline 4 in sequence from the nitrogen tank 1 to the chemical storage tank 2. An opening and closing valve 19 is provided at the connecting end of the nitrogen supply pipeline 4 on the nitrogen tank 1.

[0027] A nitrogen exhaust pipe 8 and a nitrogen recovery supply pipe 9 are connected between the top of the chemical storage tank 2 and the nitrogen recovery tank 3 . The nitrogen exhaust pipe 8 extends into the bottom of the nitrogen recovery tank 3 , and the nitrogen recovery supply pipe 9 is connected to the lower end of the side wall of the nitrogen recovery tank 3 .

[0028] A nitrogen discharge regulating valve 10 is provided on the nitrogen discharge pipeline 8, and a second self-operated nitrogen supply pressure regulating valve 11, a second nitrogen supply anti-backflow blocking device 12 and a second flow meter 13 are installed in sequence on the nitrogen recovery pipeline 9 from the nitrogen recovery tank 3 to the chemical storage tank 2.

[0029] In the utility model, chemical products are injected into the chemical storage tank 2 through the feed pipe 15, and then the nitrogen tank 1 injects nitrogen protection into the chemical storage tank 2 through the nitrogen supply pipeline 4. The nitrogen fills the top of the chemical products to prevent the oxidation of chemical products, form explosive gases, and reduce volatilization and waste. With the storage and discharge of products inside the chemical storage tank 2, the pressure of the internal nitrogen will change, and it is necessary to cooperate with nitrogen filling and nitrogen discharge operations. The nitrogen discharge pipeline 8 discharges nitrogen, which is often directly discharged, causing waste. This part of nitrogen can be recycled through the nitrogen recovery tank 3. There may be a small amount of air in the nitrogen. Therefore, the nitrogen deposited inside the nitrogen recovery tank 3 is injected into the chemical storage tank 2 again through the recovery nitrogen supply pipeline 9 to achieve recycling. The amount of nitrogen added is reasonably controlled by the first flow meter 7 and the second flow meter 13.

[0030] The first nitrogen supply anti-backflow blocking device 6 and the second nitrogen supply anti-backflow blocking device 12 can prevent nitrogen from backflowing, thereby improving the sealing effect.

[0031] The first nitrogen supply backflow prevention plugging device 6 is as follows Figure 2 As shown, it includes a first blocking shell 61, and first connecting flanges 62 are provided at both ends of the first blocking shell 61. The first blocking shell 61 is provided with a first clamping equal-diameter circular hole 63, a first expanded-diameter truncated cone hole 64 and a first supporting equal-diameter circular hole 65 in sequence from the nitrogen tank 1 to the chemical storage tank 2. The diameter of the first supporting equal-diameter circular hole 65 is smaller than the diameter of the expanded end face of the first expanded-diameter truncated cone hole 64. A first sealing ball 66 is provided in the first supporting equal-diameter circular hole 65, and a first tightening spring 67 is provided between the first sealing ball 66 and the expanded end face of the first expanded-diameter truncated cone hole 64.

[0032] The second nitrogen supply backflow prevention plugging device 12 is as follows Figure 3 As shown, it includes a second blocking shell 121, and second connecting flanges 122 are provided at both ends of the second blocking shell 121. The second blocking shell 121 is provided with a second clamping equal-diameter circular hole 123, a second expanded-diameter frustum hole 124 and a second supporting equal-diameter circular hole 125 in sequence from the nitrogen recovery tank 3 to the chemical storage tank 2. The diameter of the second supporting equal-diameter circular hole 125 is smaller than the diameter of the expanded end face of the second expanded-diameter frustum hole 124. A second sealing ball 126 is provided in the second supporting equal-diameter circular hole 125, and a second tightening spring 127 is provided between the second sealing ball 126 and the expanded end face of the second expanded-diameter frustum hole 124.

[0033] The utility model is described above by way of example in conjunction with the accompanying drawings. It is obvious that the specific implementation of the utility model is not limited to the above-mentioned method. As long as various improvements are made using the method concept and technical solution of the utility model, or are directly applied to other occasions without improvement, they are all within the protection scope of the utility model.

Claims

1. A self-powered nitrogen sealing protection device for storing chemical products, characterized in that: The invention comprises a nitrogen tank (1), a chemical storage tank (2) and a nitrogen recovery tank (3); a nitrogen supply pipeline (4) is connected between the top of the nitrogen tank (1) and the top of the chemical storage tank (2); a first self-operated nitrogen supply pressure regulating valve (5), a first nitrogen supply backflow prevention blocking device (6) and a first flow meter (7) are sequentially installed on the nitrogen supply pipeline (4) from the nitrogen tank (1) to the chemical storage tank (2); a nitrogen discharge pipeline (8) and a nitrogen recovery pipeline (9) are connected between the top of the chemical storage tank (2) and the nitrogen recovery tank (3); a nitrogen discharge regulating valve (10) is provided on the nitrogen discharge pipeline (8); and a second self-operated nitrogen supply pressure regulating valve (11), a second nitrogen supply backflow prevention blocking device (12) and a second flow meter (13) are sequentially installed on the nitrogen recovery pipeline (9) from the nitrogen recovery tank (3) to the chemical storage tank (2).

2. A self-powered nitrogen sealing protection device for chemical product storage according to claim 1, characterized in that: The nitrogen exhaust pipe (8) extends into the bottom of the nitrogen recovery tank (3), and the nitrogen recovery supply pipe (9) is connected to the lower end of the side wall of the nitrogen recovery tank (3).

3. A self-powered nitrogen sealing protection device for chemical product storage according to claim 2, characterized in that: The first nitrogen supply backflow prevention plugging device (6) comprises a first plugging shell (61), first connecting flanges (62) are arranged at both ends of the first plugging shell (61), a first clamping equal-diameter circular hole (63), a first enlarged truncated cone hole (64) and a first supporting equal-diameter circular hole (65) are arranged in sequence inside the first plugging shell (61) from the nitrogen tank (1) to the chemical storage tank (2), the diameter of the first supporting equal-diameter circular hole (65) is smaller than the diameter of the enlarged end surface of the first enlarged truncated cone hole (64), a first sealing ball (66) is arranged inside the first supporting equal-diameter circular hole (65), and a first tightening spring (67) is arranged between the first sealing ball (66) and the enlarged end surface of the first enlarged truncated cone hole (64).

4. A self-powered nitrogen sealing protection device for chemical product storage according to claim 3, characterized in that: The second nitrogen supply backflow prevention plugging device (12) comprises a second plugging shell (121), second connecting flanges (122) are arranged at both ends of the second plugging shell (121), a second clamping equal-diameter circular hole (123), a second enlarged-diameter truncated cone hole (124) and a second supporting equal-diameter circular hole (125) are arranged in sequence inside the second plugging shell (121) from the nitrogen recovery tank (3) to the chemical storage tank (2), the diameter of the second supporting equal-diameter circular hole (125) is smaller than the diameter of the enlarged end surface of the second enlarged-diameter truncated cone hole (124), a second sealing ball (126) is arranged inside the second supporting equal-diameter circular hole (125), and a second tightening spring (127) is arranged between the second sealing ball (126) and the enlarged end surface of the second enlarged-diameter truncated cone hole (124).

5. A self-powered nitrogen sealing protection device for chemical product storage according to claim 4, characterized in that: A fire-retardant breathing valve (14) is provided on the top of the chemical storage tank (2).

6. A self-powered nitrogen sealing protection device for chemical product storage according to claim 5, characterized in that: A feed pipe (15) is provided at the lower end of one side wall of the chemical storage tank (2), and a discharge pipe (16) is provided at the lower end of the other side wall. A feed valve (17) is provided on the feed pipe (15), and a discharge valve (18) is provided on the discharge pipe (16).

7. A self-powered nitrogen sealing protection device for chemical product storage according to claim 6, characterized in that: The nitrogen tank (1) is provided with an opening and closing valve (19) at the connection end of the nitrogen supply pipeline (4).

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