Liquid collecting nest emptying device for storage tank

Abstract

The utility model discloses a liquid collecting nest emptying device for a storage tank, which changes the form of a liquid collecting bag into a liquid collecting nest and greatly reduces the size, thereby saving certain material cost. The liquid collecting nest is formed by integrally machining a thick plate or a forge piece, the manufacturing and machining difficulty is greatly reduced, size limitation is avoided, the manufacturing cost is further reduced, the wall thickness of the liquid collecting nest is generally larger than 10 mm, and the strength of the hole opening position can be effectively improved. The diameter of the liquid collecting nest is generally smaller than 200 mm, and the diameter of the liquid collecting bag is generally larger than 350 mm. The size of the liquid collecting nest is smaller, the weight is lighter, and the liquid collecting nest is a very important advantage in the field of liquid collecting devices. In the field of liquid collection devices, the size and weight of equipment are often important consideration factors. According to the technical scheme, the liquid collecting nest can provide a more efficient and economical solution for the field of liquid collecting devices.

Description

Technical Field

[0001] The utility model relates to the field of liquid collection devices, and specifically, it is a liquid collecting pit draining device for storage tanks. Background Art

[0002] In the petrochemical industry, storage tanks are important equipment for storing various liquid media. Due to the particularity of petrochemical media, these media are usually toxic and harmful, so the draining requirements for storage tanks are very high. The draining of storage tanks is mainly achieved through the form of a liquid collecting package. The liquid collecting package usually consists of a small head and a drain outlet formed by a short section of small cylinder. This structure can effectively achieve draining. However, this structure has some problems, such as difficult manufacturing, high cost, and high requirements for the foundation height.

[0003] Figure 2 FIG. is a schematic structural diagram of the liquid collecting package in the prior art; the existing technology mainly realizes the draining of storage tanks through the form of a liquid collecting package. The small head needs to be integrally formed by pressing, which requires special molds and is also limited by the diameter. The smaller the diameter, the thicker the thickness, and the greater the pressing difficulty. This draining structure has a relatively high height and corresponding requirements for the foundation height, and the foundation needs to be dug out with a notch larger than the size of the liquid collecting package for the drain outlet to extend out, which causes a certain waste of materials, foundation construction, and labor.

[0004] In summary, the prior art has the following problems:

[0005] First, since the manufacturing of the small head requires special molds and is limited by the diameter, the manufacturing process is complex and the cost is high.

[0006] Second, this draining structure has a relatively high height and corresponding requirements for the foundation height, which increases the difficulty of design and construction.

[0007] In addition, the foundation needs to be dug out with a notch larger than the size of the liquid collecting package for the drain outlet to extend out, which not only wastes materials but also increases the workload and cost of construction. Therefore, the existing liquid collecting package draining technology has certain limitations in practical applications. Content of the Utility Model

[0008] The utility model makes improvements to the deficiencies of the prior art, and provides a liquid collecting pit draining device for storage tanks that greatly reduces the difficulty of manufacturing and processing, has no size limit, saves a lot of basic raw materials and labor costs, and has a low manufacturing cost. The utility model is realized through the following technical solutions:

[0009] The utility model discloses a liquid collecting pit draining device for a storage tank, which comprises a liquid collecting pit arranged at the bottom of the storage tank and a draining pipe with one end close to the bottom of the liquid collecting pit and the other end extending out of the storage tank. The liquid collecting pit is of a groove structure, including a liquid guiding surface and a groove bottom surface. The liquid guiding surface is connected to the bottom of the storage tank, and the groove bottom surface is 10 - 30 mm lower than the storage tank. The length of the liquid collecting pit is 100 - 300 mm, and the height is 10 - 50 mm.

[0010] As a further improvement, the wall thickness of the liquid collecting pit of the utility model is greater than or equal to 10 mm.

[0011] As a further improvement, the groove bottom surface of the liquid collecting pit of the utility model is a plane or a concave curved surface.

[0012] As a further improvement, the liquid guiding surface and the groove bottom surface of the liquid collecting pit of the utility model are rounded.

[0013] As a further improvement, the rounded corner of the utility model is R5 - 15 mm.

[0014] As a further improvement, the vertical distance between the bottom surface of the liquid collecting pit and the storage tank of the utility model is 30 - 50 mm.

[0015] As a further improvement, the groove structure of the liquid collecting pit of the utility model is an integrated structure integrally processed from thick plates or forgings.

[0016] As a further improvement, the material of the liquid collecting pit of the utility model is carbon steel or stainless steel, which is the same as the main material of the storage tank.

[0017] As a further improvement, the distance between the pipe orifice of the draining pipe extending into the liquid collecting pit and the groove bottom surface of the utility model is specifically 10 - 30 mm.

[0018] The beneficial effects of the present invention are as follows:

[0019] 1. The existing liquid collecting package draining technology requires special molds for manufacturing and has limitations on the diameter, which increases the complexity and cost of the manufacturing process. The liquid collecting pit structure proposed in this technical solution can be integrally processed from thick plates or forgings, greatly reducing the manufacturing and processing difficulty and having no size limitations.

[0020] 2. The existing liquid collecting package draining structure has a relatively high height and corresponding requirements for the foundation height, which increases the difficulty of design and construction. The liquid collecting pit structure proposed in this technical solution, due to the greatly reduced size, the foundation height of large and medium-sized storage tanks is not affected by the original liquid collecting package height and can adopt the conventional design height, saving a lot of foundation raw materials and labor costs.

[0021] 3. In the existing liquid collection package drainage technology, a notch larger than the size of the liquid collection package needs to be dug in the foundation for the drainage port to extend, which not only wastes materials but also increases the construction workload and cost. For the liquid collection pit structure proposed in this technical solution, due to the greatly reduced size, there is no need to dig a notch larger than the size of the liquid collection pit for the drainage port to extend, thus saving materials and labor costs.

[0022] 4. In the existing liquid collection package drainage technology, since the manufacturing of the small head requires special molds and there are limitations on the diameter, this increases the manufacturing cost. For the liquid collection pit structure proposed in this technical solution, since the wall thickness is usually greater than 10 mm, it can effectively increase the strength at the opening. Under higher pressures, it can be exempted from opening reinforcement, thus reducing the manufacturing cost.

[0023] 5. This technical solution changes the liquid collection package form to a liquid collection pit, greatly reducing the size, thus saving a certain amount of material costs. At the same time, the liquid collection pit can formulate corresponding standard series according to the size of the drainage port, and designers can directly select models, further saving design time.

[0024] 6. Due to the greatly reduced size of the liquid collection pit, the height of the foundation of large and medium-sized storage tanks is not affected by the original height of the liquid collection package, and the conventional design height can be adopted, saving a lot of foundation raw materials and labor costs. In addition, the liquid collection pit can be integrally processed with thick plates or forgings, greatly reducing the manufacturing and processing difficulty, and there is no size limit, which also further reduces the manufacturing cost.

[0025] 7. The wall thickness of the liquid collection pit is usually greater than 10 mm, which can effectively increase the strength at the opening. Under higher pressures, since the liquid collection pit can be processed to retain a larger wall thickness, according to the national standards of pressure vessels, it can be exempted from opening reinforcement, further reducing the manufacturing cost.

[0026] 8. The inner part of the liquid collection pit is made with a rounded corner transition, which can effectively reduce stress concentration and improve the stability and safety of the equipment.

[0027] 9. The liquid collection pit is not limited to being used in storage tank equipment, but can also be used in other fixed or mobile chemical equipment, which greatly expands the application scope of this technical solution. Generally speaking, compared with the existing technology, this technical solution has the advantages of low manufacturing cost, less material cost, high strength, low stress concentration, wide application scope, etc., and has significant superiority.

[0028] The diameter of the liquid collection cavity is usually less than 200 mm, while the diameter of the liquid collection package usually needs to be greater than 350 mm. This means that in this technical solution, the liquid collection cavity has a smaller size and lighter weight, which is a very important advantage in the field of liquid collection devices. Because in the field of liquid collection devices, the size and weight of the equipment are often important considerations. Therefore, in this technical solution, the liquid collection cavity can provide a more efficient and economical solution for the field of liquid collection devices. Finally, in this technical solution, the bottom of the liquid collection cavity is a flat surface or a concave surface, and the internal corners are rounded to effectively reduce stress concentration. This not only increases the service life of the liquid collection cavity but also reduces the costs of maintenance and repair. Therefore, in this technical solution, the liquid collection cavity is not only more durable but also more economical, which is undoubtedly a major technical advantage for the fields of petrochemical equipment, storage tank technology, and liquid collection devices. Generally speaking, due to the advancement of this technical solution, it can be widely applied in application fields such as the fields of petrochemical equipment, storage tank technology, and liquid collection devices. With the continuous progress of technology, this technical solution is expected to occupy an important position in the future market and make a positive contribution to the development of related fields. Brief Description of the Drawings

[0029] Figure 1 is a schematic structural diagram of the device of the present utility model;

[0030] Figure 2 is a schematic structural diagram of the liquid collection package in the prior art;

[0031] In the figure: 1 is the head, 2 is the drain port, 3 is the liquid accumulation cavity, 4 is the drain pipe, 5 is the storage tank, 6 is the liquid guiding surface, and 7 is the bottom surface of the tank. Detailed Embodiments

[0032] The following further illustrates the technical solutions of the present invention through specific embodiments in conjunction with the accompanying drawings of the specification:

[0033] Embodiment 1

[0034] The present utility model discloses a drain device for the liquid collection cavity 3 of a storage tank 5, Figure 1Schematic structural diagram of the device of the present utility model; it includes a liquid collection pit 3 arranged at the bottom of a storage tank 5, and a drain pipe 4 with one end close to the bottom of the liquid collection pit 3 and the other end with a drain port 2 extending outside the storage tank 5. The liquid collection pit 3 is a groove structure, including a liquid guiding surface 6 and a groove bottom surface 7. The liquid guiding surface 6 is connected to the bottom of the storage tank 5, the groove bottom surface 7 is 10 mm lower than the bottom of the storage tank 5. The length of the liquid collection pit 3 is 100 mm and the height is 10 mm. The wall thickness of the liquid collection pit 3 is equal to 12 mm. The groove bottom surface 7 of the liquid collection pit 3 is a plane. The structure between the liquid guiding surface 6 and the groove bottom surface 7 is a rounded corner structure, and the rounded corner is R5 mm. The vertical distance between the bottom surface of the liquid collection pit 3 and the storage tank 5 is 50 mm. The groove structure of the liquid collection pit 3 is an integrated structure integrally processed from thick plates. The material of the liquid collection pit 3 is carbon steel and is the same as the main material of the storage tank 5. The distance between the pipe orifice of the drain pipe 4 extending into the liquid collection pit 3 and the groove bottom surface 7 is 10 mm.

[0035] Embodiment 2

[0036] The present utility model discloses a drain device for the liquid collection pit 3 of a storage tank 5, including a liquid collection pit 3 arranged at the bottom of the storage tank 5, and a drain pipe 4 with one end close to the bottom of the liquid collection pit 3 and the other end with a drain port 2 extending outside the storage tank 5. The liquid collection pit 3 is a groove structure, including a liquid guiding surface 6 and a groove bottom surface 7. The liquid guiding surface 6 is connected to the bottom of the storage tank 5, the groove bottom surface 7 is 20 mm lower than the bottom of the storage tank 5. The length of the liquid collection pit 3 is 150 mm and the height is 30 mm. The wall thickness of the liquid collection pit 3 is 15 mm. The groove bottom surface 7 of the liquid collection pit 3 is a concave curved surface. The structure between the liquid guiding surface 6 and the groove bottom surface 7 is a rounded corner structure, and the rounded corner is R10 mm. The vertical distance between the bottom surface of the liquid collection pit 3 and the storage tank 5 is 40 mm. The groove structure of the liquid collection pit 3 is an integrated structure integrally processed from forgings. The material of the liquid collection pit 3 is stainless steel and is the same as the main material of the storage tank 5. The distance between the pipe orifice of the drain pipe 4 extending into the liquid collection pit 3 and the groove bottom surface 7 is 20 mm.

[0037] Embodiment 3

[0038] The present utility model discloses a drain device for the liquid collection pit 3 of a storage tank 5, including a liquid collection pit 3 arranged at the bottom of the storage tank 5, and a drain pipe 4 with one end close to the bottom of the liquid collection pit 3 and the other end with a drain port 2 extending outside the storage tank 5. The liquid collection pit 3 is a groove structure, including a liquid guiding surface 6 and a groove bottom surface 7. The liquid guiding surface 6 is connected to the bottom of the storage tank 5, the groove bottom surface 7 is 30 mm lower than the bottom of the storage tank 5. The length of the liquid collection pit 3 is 300 mm and the height is 50 mm. The wall thickness of the liquid collection pit 3 is 10 mm. The groove bottom surface 7 of the liquid collection pit 3 is a plane. The rounded corner between the liquid guiding surface 6 and the groove bottom surface 7 is R15 mm. The vertical distance between the bottom surface of the liquid collection pit 3 and the storage tank 5 is 30 mm. The groove structure of the liquid collection pit 3 is an integrated structure integrally processed from thick plates. The material of the liquid collection pit 3 is stainless steel and is the same as the main material of the storage tank 5. The distance between the pipe orifice of the drain pipe 4 extending into the liquid collection pit 3 and the groove bottom surface 7 is 30 mm.

[0039] This embodiment provides a liquid collecting pit 3 drainage device for petrochemical storage tanks 5. The specific implementation steps are as follows: Step 1: Select a suitable thick plate or forging. According to the pressure and size of the storage tank 5, select a plate or forging with a suitable thickness. For example, for a storage tank 5 with a pressure below 10 MPa, a plate or forging with a thickness of 15 mm can be selected. Step 2: Select the corresponding standard series of liquid collecting pits 3 according to the size of the drainage port 2. For example, if the diameter of the drainage port 2 is 50 mm, a liquid collecting pit 3 with a diameter of 60 mm can be selected. Step 3: Use the thick plate or forging for overall processing to manufacture the liquid collecting pit 3. During the processing, pay attention to maintaining the design of the plane or the bottom of the concave surface of the liquid collecting pit 3, and make a rounded transition inside to reduce stress concentration. Step 4: Select a suitable installation position for the liquid collecting pit 3 according to the foundation height of the storage tank 5 to ensure that the distance between the top of the liquid collecting pit 3 and the bottom of the storage tank 5 is appropriate. Usually, the distance is between 100 mm and 300 mm. Step 5: Install the liquid collecting pit 3, fix the liquid collecting pit 3 at the bottom of the storage tank 5, ensure that the drainage port 2 of the liquid collecting pit 3 is connected to the drainage pipe 4 of the storage tank 5, and check the sealing performance of the connection to ensure no leakage. Step 6: Conduct a pressure test and leak test on the storage tank 5 to ensure that the liquid collecting pit 3 drainage device works properly without leakage. The above are the specific implementation steps of this embodiment. Through this method, the drainage of petrochemical storage tanks 5 can be realized, and the safety and reliability of the storage tanks 5 can be improved.

[0040] Those of ordinary skill in the art can understand that the above are only preferred examples of the utility model and are not used to limit the utility model. Although the utility model has been described in detail with reference to the foregoing examples, for those skilled in the art, they can still modify the technical solutions described in the foregoing examples or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, etc. made within the spirit and principle of the utility model shall be included within the protection scope of the utility model.

Claims

1. A liquid collection pit drainage device for a storage tank, characterized in that, It includes a liquid collecting pit arranged at the bottom of the storage tank and a drain pipe with one end close to the bottom of the liquid collecting pit and the other end of the drain opening extending outside the storage tank. The liquid collecting pit is of a groove structure, including a liquid guiding surface and a groove bottom surface. The liquid guiding surface is connected to the bottom of the storage tank, and the groove bottom surface is 10 - 30 mm lower than the storage tank. The length of the liquid collecting pit is 100 - 300 mm, and the height is 10 - 50 mm.

2. The liquid collecting pit draining device for a storage tank according to claim 1, wherein, The wall thickness of the liquid collecting pit is greater than or equal to 10 mm.

3. The liquid collecting pit draining device for a storage tank according to claim 1, characterized in that, The groove bottom surface of the liquid collecting pit is a flat surface or a concave curved surface.

4. The liquid collection pit drainage device for a storage tank according to claim 1 or 2 or 3, characterized in that, A fillet structure is formed between the liquid guiding surface and the groove bottom surface.

5. The liquid collection pit drainage device for a storage tank according to claim 4, characterized in that, The fillet is R5 - 15 mm.

6. The liquid collecting pit draining device for a storage tank according to claim 5, characterized in that, The vertical distance between the bottom surface of the liquid collecting pit and the storage tank is 30 - 50 mm.

7. The liquid collection pit drainage device for a storage tank according to claim 1 or 2 or 4 or 5 or 6, characterized in that, The groove structure of the liquid collecting pit is an integral structure integrally processed from thick plates or forgings.

8. The liquid collection pit draining device for a storage tank according to claim 7, characterized in that, The material of the liquid collecting pit is carbon steel or stainless steel, which is consistent with the main material of the storage tank.

9. The liquid collecting pit draining device for a storage tank according to claim 8, wherein, The distance between the pipe orifice of the drain pipe extending into the liquid collecting pit and the groove bottom surface is 10 - 30 mm.

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