Vertical storage tank with pressure testing device

Abstract

The utility model discloses a vertical storage tank with a pressure test device, which comprises a communicating pipe arranged at the lower part of the vertical storage tank. The exhaust valve is arranged on the communicating pipe, and the exhaust valve is located on the outer side; the rigid pipe is arranged in the vertical storage tank, the upper end of the rigid pipe is located in the center of the top in the vertical storage tank, and the lower end of the rigid pipe is communicated with the communicating pipe; the number of the pipe clamps is at least one, and the pipe clamps are arranged on the inner wall of the vertical storage tank; a sleeve is arranged on the pipe clamp; and a gap is formed between the inner wall of the sleeve and the outer wall of the rigid pipe. The vertical storage tank is suitable for a high-rise structure; the influence of vertical storage tank pipe orifice limitation and the problem of water pressure test exhaust regular inspection of user field water pressure test exhaust are thoroughly solved; an exhaust pipeline is installed outside the vertical buffer tank of a high-rise structure and leaks under the action of an external load, the maintenance operation difficulty is reduced, and an operation and maintenance platform on the top of the vertical buffer tank is omitted.

Description

Technical Field

[0001] The utility model belongs to the technical field of pressure vessels, and in particular relates to a vertical storage tank with a pressure testing device. Background Art

[0002] The existing design of vertical pressure vessels is that the pressure test is generally carried out using horizontal water pressure or air pressure. Usually, the static pressure of the liquid column of the vertical storage tank needs to be taken into account during the design, and the design of the vertical storage tank is realized. Most of the pressure tests are carried out using water pressure to verify the design and manufacturing quality of the container. The problems and disadvantages of the technology are as follows: 1. The process flow generally does not have an exhaust port, which can reduce the gas leakage point. If the process flow is designed with an exhaust port, a flange or welding is usually used at the top exhaust port. It is necessary to set up a platform escalator to operate at the top, or lead the pipeline from the top of the container to the bottom for operation. In this way, the on-site water pressure test of the vertical storage tank can be realized, but it increases the difficulty of the operation test and the cost of maintenance operation. 2. There is a top exhaust pipe and pipeline system. The external pipeline is prone to damage and deformation and leakage under the action of external loads. After installation, it will affect the stability of the system operation. Therefore, the buffer tank of the air separation device is generally not designed with a top exhaust pipe. During on-site maintenance, it is impossible to perform a water pressure test according to the design requirements. Changing the test type requires an increase in the cost of design changes. 3. For vertical buffer tanks designed according to water pressure, if the top exhaust port is not set, the user cannot perform water pressure test operations on site, and water pressure test cannot be performed during regular inspections. Design changes are also required to conduct air pressure tests.

[0003] A Chinese patent document with publication number CN101672742B discloses an exhaust device for a water pressure test of a pressure vessel, comprising: an exhaust pipe arranged in the pressure vessel and used to lead the gas in the pressure vessel to the outside of the pressure vessel, a connection mechanism arranged on the wall of the pressure vessel and connected to the exhaust pipe, a stop valve located outside the pressure vessel and connected to the connection mechanism and used to cut off or adjust the flow of gas discharged through the exhaust pipe, characterized in that the exhaust pipe is a flexible hose, and the other end of which is fixed to a floating member that can float on water.

[0004] In the above patent scheme, in order to exhaust the gas on the top of the container, a flexible hose and a floating part are respectively arranged in the container. Driven by the repeated filling of liquid in the container and the fluctuation of the floating part, the flexible hose is in a deformation movement for a long time. At the same time, the floating part and the flexible hose are also subject to corrosion and oxidation of the internal fillings. Therefore, the life of the entire exhaust device is limited, and the substances decomposed by corrosion and oxidation will also cause pollution to the fillings in the container. Utility Model Content

[0005] In order to overcome the technical problem in the prior art that the top of the pressure vessel needs to be vented during pressure testing, while the external exhaust device on the top and the internal floating exhaust device have potential hidden dangers respectively; one purpose of the utility model is to provide a vertical storage tank with a pressure testing device, by arranging a rigid pipe inside the vertical storage tank, the upper end of which is located at the inner top and the lower end is connected to the outside of the vertical storage tank, to vent the top of the vertical storage tank.

[0006] In order to achieve the above-mentioned purpose, the utility model adopts the following technical solutions: a vertical storage tank with a pressure test device, including a connecting pipe, which is horizontally arranged at the lower part of the vertical storage tank; an exhaust valve, which is arranged on the connecting pipe, and the exhaust valve is located outside the vertical storage tank; a rigid pipe, which is arranged in the vertical storage tank, the upper end of the rigid pipe is located at the top center position in the vertical storage tank, and the lower end is connected with the connecting pipe; there is at least one pipe clamp, which is arranged on the inner wall of the vertical storage tank and is used to install the rigid pipe; wherein a sleeve is arranged on the pipe clamp at the outer periphery of the rigid pipe; there is a gap between the inner wall of the sleeve and the outer wall of the rigid pipe.

[0007] It fundamentally solves the risk of shutdown due to leakage caused by external wind load, mechanical load, etc. when the exhaust pipe is installed outside; the exhaust pipeline is designed inside the vertical storage tank, which is simple and convenient. A small amount of leakage in the internal pipeline can achieve a consistent pressure balance inside and outside the pipe and is not easy to be damaged, reducing the cost of shutdown and maintenance.

[0008] The pipe clamp is selected for fixing to ensure the assembly position of the rigid pipe, and at the same time, it can allow the rigid pipe to have a certain expansion and contraction deformation space, thereby reducing the risk of damage to the rigid pipe. During installation, the assembly position of the upper end of the rigid pipe is controlled to be close to the center of the vertical storage tank; the components at both ends of the connecting pipe are welded to ensure the tightness of the external process pipeline system.

[0009] Furthermore, the rigid tube is close to the inner wall of the vertical storage tank; the rigid tube is formed by bending a steel tube and has at least one bending angle;

[0010] Specifically, the bending radius of the bending angle is greater than or equal to 1.5 times the diameter of the rigid tube.

[0011] Specifically, the greater the density of the gas contained in the vertical storage tank, the greater the bending radius of the bending angle.

[0012] The path shape of the rigid tube is designed according to the fluid properties, and the structure adopts a curved arc structure to reduce the splicing interface, effectively utilize the steel tube, reduce the material consumption of the steel tube, and the leakage point, thereby reducing the cost. The bending angle is reasonably set according to the gas density and specific working conditions to reduce the erosion and wear of the gas on the rigid tube and increase the service life of the rigid tube.

[0013] Furthermore, an oblique pointed mouth is provided at the upper end of the rigid tube; the outlet direction of the oblique pointed mouth points to the interior of the vertical storage tank; the smaller the density of the gas contained in the vertical storage tank, the smaller the distance between the oblique pointed mouth and the top of the vertical storage tank.

[0014] For example, for a tank storing carbon dioxide, since its density is greater than that of air, the oblique pointed mouth may not extend too high; for a vertical storage tank storing He gas, since its density is lower than that of air, the oblique pointed mouth extends to a higher position.

[0015] Furthermore, the connecting pipe is made of thick-walled pipe or is forged from steel.

[0016] The thick-walled pipe is also called a thick-walled steel pipe, and a steel pipe with a ratio of outer diameter to wall thickness less than 20 is called a thick-walled steel pipe; the material selection is simple and feasible.

[0017] Optionally, the pipe clamp includes two symmetrically arranged half clamps; the half clamps include a supporting portion arranged on the inner wall of the vertical storage tank and a semicircular portion arranged at the end of the supporting portion; the openings of the two semicircular portions are opposite to each other and combined to form the sleeve.

[0018] Optionally, the pipe clamp includes a support portion arranged on the inner wall of the vertical storage tank and a sleeve arranged at the end of the support portion; the outer wall of the sleeve has an opening and the sleeve is elastic.

[0019] Furthermore, a safety device port is provided on the upper portion of the outer wall of the vertical storage tank; an air inlet and outlet are provided on the lower portion of the outer wall of the vertical storage tank; the exhaust valve and the air inlet and outlet are located at extreme positions far away from each other on the same circumference; a sewage outlet is provided below the vertical storage tank; the sewage outlet is connected to the central position of the bottom of the vertical storage tank.

[0020] The medium is stored and used by the user through the air inlet and outlet, the safety device ensures the safe discharge of overpressure in the container, the drain port is used to discharge waste from the container, the exhaust valve is used to exhaust gas during the vertical tank test and regular maintenance, and the rigid pipe is used to discharge the internal exhausted gas to a safe place.

[0021] Furthermore, two lifting ears are symmetrically arranged at the upper end of the vertical storage tank; and two lifting ears are symmetrically arranged at the lower end of the side wall of the vertical storage tank.

[0022] The vertical storage tank has its internal pipelines assembled horizontally during production, so the quality is reliable, there is no risk of high-altitude assembly, and the safety is high.

[0023] Compared with the prior art, the beneficial effects of the utility model are: it is particularly suitable for vertical storage tanks with tall structures; it completely solves the influence of the pipe orifice limitation of the process design on the vertical storage tank, solves the problem of exhaust gas during the user's on-site water pressure test, and regularly inspects the exhaust gas during the water pressure test; it solves the leakage and maintenance difficulty of the exhaust pipe installed on the outside of the vertical buffer tank with tall structures under the action of external loads, and eliminates the operation and maintenance platform on the top of the vertical storage tank. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a structural schematic diagram of the utility model;

[0025] Figure 2 It is a radial cross-sectional schematic diagram of the utility model;

[0026] Figure 3 It is a partial schematic diagram of the upper end of the rigid tube of the utility model;

[0027] Figure 4 It is a structural schematic diagram of the rigid tube of the utility model.

[0028] In the figure: 1. vertical storage tank; 11. lifting ear; 21. connecting pipe; 22. rigid pipe; 221. oblique tip; 222. bending angle; 23. exhaust valve; 24. pipe clamp; 3. air inlet and outlet; 4. safety device port; 5. sewage outlet. DETAILED DESCRIPTION

[0029] The present invention is further described below in conjunction with the accompanying drawings and specific implementation methods. It should be noted that, under the premise of no conflict, the various embodiments or technical features described below can be arbitrarily combined to form a new embodiment.

[0030] In the description of the present invention, it should be noted that directional words, such as the terms "center", "lateral", "longitudinal", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", etc., indicating directions and positional relationships are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of narrating the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and cannot be understood as limiting the specific protection scope of the present invention.

[0031] In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features. Therefore, the definition of "first" and "second" features can explicitly or implicitly include one or more of the features. In the description of the utility model, the meaning of "several" is two or more, unless otherwise clearly and specifically defined.

[0032] In the present invention, unless otherwise specified and limited, the terms "setting", "installation" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can also be a mechanical connection; it can be directly connected, or it can be connected through an intermediate medium, or two elements can be internally connected. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0033] See also Figure 1-Figure 4 A vertical storage tank with a pressure test device includes a cylindrical vertical storage tank 1; a connecting pipe 21, the connecting pipe 21 is horizontally arranged at the lower part of the vertical storage tank 1; an exhaust valve 23, the exhaust valve 23 is arranged on the connecting pipe 21, and the exhaust valve 23 is located outside the vertical storage tank 1; a rigid pipe 22, the rigid pipe 22 is arranged in the vertical storage tank 1, the upper end of the rigid pipe 22 is located at the top center position in the vertical storage tank 1, and the lower end is connected with the connecting pipe 21; a pipe clamp 24, the pipe clamp 24 has three pieces, the pipe clamp 24 is arranged on the inner wall of the vertical storage tank 1, and the pipe clamp 24 is used to install the rigid pipe 22.

[0034] The rigid tube 22 is formed by bending a steel tube and has at least one bending angle 222; the rigid tube 22 is in contact with the inner wall of the vertical storage tank 1; the bending radius of the bending angle 222 is greater than or equal to 1.5 times the diameter of the rigid tube 22; the greater the density of the gas contained in the vertical storage tank 1, the greater the bending radius of the bending angle 222.

[0035] The upper end of the rigid tube 22 is provided with an oblique pointed mouth 221; the oblique pointed mouth 221 is formed by cutting the upper end of the rigid tube 22 at a 45-degree cutting angle; the outlet direction of the oblique pointed mouth 221 points to the interior of the vertical storage tank 1; the smaller the density of the gas contained in the vertical storage tank 1, the smaller the distance between the oblique pointed mouth 221 and the top of the vertical storage tank.

[0036] The connecting pipe 21 is made of a thick-walled pipe or is forged from steel.

[0037] The upper part of the outer wall of the vertical storage tank 1 is provided with a safety device port 4; the lower part of the outer wall of the vertical storage tank 1 is provided with an air inlet and outlet 3; the exhaust valve 23 and the air inlet and outlet 3 are located at the same circumference and are located at the extreme positions far away from each other (such as the attached Figure 2 As shown); a sewage outlet 5 is provided below the vertical storage tank 1; the sewage outlet 5 is connected to the central position of the bottom of the vertical storage tank 1.

[0038] Two lifting ears 11 are symmetrically arranged at the upper end of the vertical storage tank 1; two lifting ears 11 are symmetrically arranged at the lower end of the side wall of the vertical storage tank 1; the vertical storage tank 1 can be lifted vertically or horizontally respectively.

[0039] The pipe clamp 24 includes two symmetrically arranged half clamps; the half clamps include a supporting portion arranged on the inner wall of the vertical storage tank 1 and a semicircular portion arranged at the end of the supporting portion; the openings of the two semicircular portions are oppositely combined to form a sleeve; there is a gap between the inner wall of the sleeve and the outer wall of the rigid tube 22.

[0040] In other embodiments, the pipe clamp 24 may include a support portion provided on the inner wall of the vertical storage tank 1 and a sleeve provided at the end of the support portion; a gap is provided between the inner wall of the sleeve and the outer wall of the rigid pipe 22; the outer wall of the sleeve has an opening and the sleeve is elastic.

[0041] It is particularly suitable for vertical storage tanks with tall structures. During on-site maintenance, it is impossible to perform water pressure tests according to design requirements, and changing the test type requires increased design change costs. When the vertical storage tank is not equipped with a top exhaust port, the user cannot perform water pressure tests on site, and regular inspections cannot be carried out. The risk of design changes to air pressure tests increasing the cost of modification.

[0042] However, if flanges or welding are used at the exhaust port on the top of the vertical storage tank to lead the pipeline from the top to the bottom, there will be risks of working at heights during installation and maintenance; and setting up a platform escalator for operation at the top will increase costs.

[0043] It fundamentally solves the risk of shutdown due to leakage of external exhaust pipes caused by external loads; the problem of being unable to empty the internal gas of high-rise vertical storage tanks; and solves the risk of equipment shutdown and loss caused by external loads acting on the external exhaust pipe downpipe system, causing damage and deformation and leakage.

[0044] The above description is only a specific embodiment of the present invention, but the technical features of the present invention are not limited thereto. Any changes or modifications made by any technician in the field of the present invention are included in the patent scope of the present invention.

Claims

1. A vertical storage tank with a pressure test device, characterized in that: Included A connecting pipe, the connecting pipe is horizontally arranged at the lower part of the vertical storage tank; An exhaust valve, the exhaust valve is arranged on the connecting pipe, and the exhaust valve is located outside the vertical storage tank; A rigid pipe, wherein the rigid pipe is disposed in the vertical storage tank, the upper end of the rigid pipe is located at the top center of the vertical storage tank, and the lower end of the rigid pipe is connected to the connecting pipe; A pipe clamp, at least one of which is disposed on the inner wall of the vertical storage tank and is used to install the rigid pipe; Wherein, a sleeve is arranged on the pipe clamp and located on the outer periphery of the rigid pipe; and a gap is provided between the inner wall of the sleeve and the outer wall of the rigid pipe.

2. The vertical storage tank according to claim 1, characterized in that: The rigid pipe is close to the inner wall of the vertical storage tank; the rigid pipe is formed by bending a steel pipe and has at least one bending angle.

3. The vertical storage tank according to claim 2, characterized in that: The bending radius of the bending angle is greater than or equal to 1.5 times the diameter of the rigid tube.

4. The vertical storage tank according to claim 2, characterized in that: The greater the density of the gas contained in the vertical storage tank, the greater the bending radius of the bending angle.

5. A vertical storage tank as described in any one of claims 1 to 4, characterized in that: The upper end of the rigid tube is provided with an oblique pointed mouth; the outlet direction of the oblique pointed mouth points to the inside of the vertical storage tank; the smaller the density of the gas contained in the vertical storage tank, the smaller the distance between the oblique pointed mouth and the top of the vertical storage tank.

6. A vertical storage tank as described in any one of claims 1 to 4, characterized in that: The connecting pipe is made of thick-walled pipe or forged from steel.

7. A vertical storage tank as described in any one of claims 1 to 4, characterized in that: The pipe clamp comprises two symmetrically arranged half clamp bodies; the half clamp body comprises a supporting part arranged on the inner wall of the vertical storage tank and a semicircular part arranged at the end of the supporting part; the openings of the two semicircular parts are opposite to each other and combined into the sleeve.

8. A vertical storage tank as described in any one of claims 1 to 4, characterized in that: The pipe clamp comprises a supporting part arranged on the inner wall of the vertical storage tank and a sleeve arranged at the end of the supporting part; the outer wall of the sleeve has an opening and the sleeve is elastic.

9. The vertical storage tank according to any one of claims 1 to 4, characterized in that: A safety device port is provided on the upper portion of the outer wall of the vertical storage tank; an air inlet and outlet are provided on the lower portion of the outer wall of the vertical storage tank; the exhaust valve and the air inlet and outlet are located at extreme positions far away from each other on the same circumference; a sewage outlet is provided below the vertical storage tank; the sewage outlet is connected to the central position of the bottom of the vertical storage tank.

10. The vertical storage tank according to any one of claims 1 to 4, characterized in that: Two lifting ears are symmetrically arranged at the upper end of the vertical storage tank; and two lifting ears are symmetrically arranged at the lower end of the side wall of the vertical storage tank.

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