Magnetic flap liquid level meter closed drainage system and working method thereof

Abstract

The invention belongs to the field of liquid level detection of petrochemical containers, and relates to a closed liquid drainage system of a magnetic flap liquid level meter and a working method of the closed liquid drainage system. Comprising a container, and the container is communicated with a magnetic turning plate liquid level meter through an upper communicating pipeline and a lower communicating pipeline, so that the container and the magnetic turning plate liquid level meter form a communicating vessel. And a blow-down valve is arranged at the bottom of the magnetic flap liquid level meter and is used for discharging liquid and sewage of the magnetic flap liquid level meter. And a second stop valve and a third stop valve are arranged on the lower communication pipeline, the third stop valve is closed, the blow-down valve is opened, and blow-down of the magnetic flap liquid level meter can be carried out without stopping production. A liquid drainage pipeline communicated with the lower communication pipeline is arranged between the second stop valve and the third stop valve, and a fourth stop valve is arranged on the liquid drainage pipeline. And the combined use of the blow-down valve, the second stop valve, the third stop valve and the fourth stop valve can realize non-stop liquid drainage and blow-down of the magnetic flap liquid level meter and the lower communicating pipe.

Description

Technical Field

[0001] The invention belongs to the field of petrochemical container liquid level detection and relates to a closed liquid discharge system of a magnetic flap liquid level gauge and a working method thereof. Background Art

[0002] The magnetic flap level gauge is one of the on-site indicating instruments widely used in industrial enterprises such as petroleum, chemical, electric power, and metallurgy. It can be used to detect the liquid level of various towers, tanks, tanks, spherical containers, boilers and other equipment. The level gauge has a simple structure, intuitive and clear observation, no leakage, easy installation, and simple maintenance. The upper and lower mounting flanges of the magnetic flap level gauge are connected to the container to form a communicating vessel, and the actual height of the liquid level in the container can be directly observed through the magnetic flap.

[0003] In the petroleum and chemical industries, the medium in the container is complex and has high viscosity, which may cause the main drainage pipe of the magnetic flap level gauge and the lower connecting pipe of the container to be blocked, causing the magnetic float to be stuck in the main drainage pipe of the magnetic flap level gauge, resulting in inaccurate liquid level display. It is necessary to drain the magnetic flap level gauge from time to time according to the medium conditions.

[0004] In actual on-site work, there are two problems:

[0005] 1. Normally, the float of the magnetic flap level gauge can only be drained through the drain valve, and the medium in the lower connecting pipe can only be discharged when production is stopped. The device does not have the conditions for drainage during production and use. However, if the drainage is not carried out for a long time, it is easy to cause blockage of the lower connecting pipeline and inaccurate liquid level measurement.

[0006] 2. The liquid in the float of the magnetic flap level gauge can only be discharged to the outside through the drain valve. The liquid is collected in a bucket. The pressure of the container is relatively high. The operator may cause injuries from the high-pressure medium and oil splashing during the drainage process, which does not meet the requirements of safety and environmental protection. Therefore, a new technical solution is needed to solve the above problems. Summary of the invention

[0007] In order to overcome the shortcomings of the above-mentioned prior art, the purpose of the present invention is to provide a closed drainage system for a magnetic flap level gauge and a working method thereof. The present invention can realize the non-stop drainage of the magnetic flap level gauge and the lower connecting pipe, thereby solving the problems of high-pressure medium injuring people and oil splashing during the drainage process of the magnetic flap level gauge.

[0008] In order to achieve the above object, the present invention adopts the following technical solutions:

[0009] The present invention discloses a closed liquid discharge system for a magnetic flap liquid level gauge, comprising a container, wherein the container is connected to the magnetic flap liquid level gauge through an upper connecting pipeline and a lower connecting pipeline respectively, a sewage valve is arranged at the bottom of the magnetic flap liquid level gauge, a second stop valve and a third stop valve are arranged on the lower connecting pipeline, a liquid discharge pipeline connected to the lower connecting pipeline is arranged between the second stop valve and the third stop valve, and a fourth stop valve is arranged on the liquid discharge pipeline.

[0010] Furthermore, a liquid phase pipeline connected to the interior of the container is provided on the container, the lower connecting pipeline is connected to the liquid phase pipeline through a drainage pipeline, and a fifth stop valve is provided on the liquid phase pipeline.

[0011] Furthermore, a second three-way joint for connecting to a liquid discharge line is provided on the liquid phase pipeline, and the fifth stop valve is located between the second three-way joint and the container.

[0012] Furthermore, the magnetic flap level gauge includes a float, in which a magnetic float is arranged.

[0013] Furthermore, the magnetic flap level gauge is provided with a display panel and a positioning clamp.

[0014] Furthermore, the magnetic flap level gauge is connected to the drain valve via a convex flange cover.

[0015] Furthermore, the drain valve is connected to the waste liquid tank via a drain hose.

[0016] Furthermore, the waste liquid tank comprises a tank body, a movable handle and a plurality of supporting legs are provided on the tank body, casters are provided on the supporting legs, and a drain valve is arranged at the bottom of the tank body.

[0017] Furthermore, a first stop valve is arranged on the upper connecting pipeline.

[0018] The present invention also discloses a working method of a closed liquid discharge system of a magnetic flap level gauge, comprising the following steps:

[0019] Open the second stop valve and the third stop valve, close the drain valve and the fourth stop valve, and measure the liquid level in the container using a magnetic flap level gauge;

[0020] The sewage discharge process is as follows:

[0021] Close the drain valve and the second stop valve, open the fourth stop valve and the third stop valve, and drain the magnetic flap level gauge and the lower connecting pipeline between the drainage pipeline and the magnetic flap level gauge;

[0022] Close the third stop valve, open the second stop valve and the fourth stop valve, and drain the lower connecting pipeline between the drainage pipeline and the container;

[0023] Close the fourth stop valve, open the second stop valve, the third stop valve and the drain valve, and drain the magnetic flap level gauge and the lower connecting pipeline;

[0024] Close the fourth stop valve and the second stop valve, open the drain valve, and drain the magnetic flap level gauge;

[0025] Close the third stop valve, open the drain valve, and drain the magnetic flap level gauge.

[0026] Compared with the prior art, the present invention has the following beneficial effects:

[0027] The present invention includes a container, and the container is connected to a magnetic flap level gauge through an upper connecting pipeline and a lower connecting pipeline respectively. The medium in the container is introduced into the magnetic flap level gauge through the lower connecting pipeline. The upper connecting pipeline ensures the connection between the container and the air above the magnetic flap level gauge, so that the container and the magnetic flap level gauge form a communicating vessel. A drain valve is arranged at the bottom of the magnetic flap level gauge, and the drain valve is used for draining liquid and sewage of the magnetic flap level gauge. A second stop valve and a third stop valve are arranged on the lower connecting pipeline. The third stop valve is closed and the drain valve is opened, so that sewage of the magnetic flap level gauge can be discharged without stopping production. A drainage pipeline connected to the lower connecting pipeline is arranged between the second stop valve and the third stop valve, and a fourth stop valve is arranged on the drainage pipeline. The drain valve and the second stop valve are closed, and the third stop valve and the fourth stop valve are opened to drain sewage and dredge the magnetic flap level gauge and the lower connecting pipeline between the drainage pipeline and the magnetic flap level gauge. Close the third stop valve, open the second stop valve and the fourth stop valve, and the sewage can be dredged from the lower connecting pipeline between the drainage pipeline and the container. Close the fourth stop valve, open the second stop valve, the third stop valve and the sewage valve, and the sewage from the magnetic flap level gauge and the lower connecting pipeline can be drained. The combination of the sewage valve, the second stop valve, the third stop valve and the fourth stop valve can achieve the drainage of the magnetic flap level gauge and the lower connecting pipe without stopping production.

[0028] Furthermore, the container is provided with a liquid phase pipeline connected to the inside of the container, the lower connecting pipeline is connected to the liquid phase pipeline through a liquid discharge pipeline, and a fifth stop valve is provided on the liquid phase pipeline. By opening the fifth stop valve, the medium in the container can be discharged through the liquid phase pipeline. By closing the fifth stop valve and opening the fourth stop valve, the liquid discharged through the fourth stop valve enters the liquid phase pipeline and is discharged through the liquid phase pipeline. This can prevent excessive liquid pressure in the magnetic flap level gauge from causing high-pressure medium to injure people and oil to splash, thus solving the problem of high-pressure medium injuring people and oil to splash during the discharge of the magnetic flap level gauge.

[0029] The method of the present invention opens the second stop valve and the third stop valve, closes the drain valve and the fourth stop valve, and measures the liquid level in the container by means of a magnetic flap level gauge. The drainage process is as follows: close the drain valve and the second stop valve, open the fourth stop valve and the third stop valve, drain the magnetic flap level gauge and the lower connecting pipeline between the drainage pipeline and the magnetic flap level gauge, and realize the drainage and drainage of the magnetic flap level gauge and the lower connecting pipe without stopping production. Close the third stop valve, open the second stop valve and the fourth stop valve, and drain and dredge the lower connecting pipeline between the drainage pipeline and the container; close the fourth stop valve, open the second stop valve, the third stop valve and the drain valve, and drain the magnetic flap level gauge and the lower connecting pipeline; close the fourth stop valve and the second stop valve, open the drain valve, and drain the magnetic flap level gauge; close the third stop valve, open the drain valve, and drain the magnetic flap level gauge. The present invention can realize the drainage of liquid and sewage from the magnetic flap level gauge and the lower connecting pipe through a variety of methods, and can realize the drainage of liquid and sewage from the magnetic flap level gauge and the lower connecting pipe without stopping production, and the operation is simple, practical and reliable. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0031] Figure 2 This is a schematic diagram of the overall structure of the present invention with an additional waste liquid tank.

[0032] Among them: 1. Container; 2. Magnetic flap level gauge; 21. Float; 22. Display panel; 23. Magnetic float; 24. Raised flange cover; 25. Drain valve; 26. Positioning clamp; 3. Upper connecting pipeline; 31. First stop valve; 4. Lower connecting pipeline; 41. Second stop valve; 42. First three-way joint; 43. Third stop valve; 5. Drain pipeline; 51. Fourth stop valve; 6. Liquid phase pipeline; 61. Fifth stop valve; 62. Second three-way joint; 7. Waste liquid tank; 71. Tank body; 72. Support legs; 73. Casters; 74. Moving handle; 75. Drain valve; 8. Drain hose. DETAILED DESCRIPTION

[0033] In order to enable those skilled in the art to better understand the scheme of the present invention, the technical scheme in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0034] It should be noted that the terms "first", "second", etc. in the specification and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units that are clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0035] The present invention is further described in detail below in conjunction with the accompanying drawings:

[0036] See also Figure 1 The present invention discloses a closed drainage system for a magnetic flap level gauge, comprising a container 1, wherein the container 1 is connected to a magnetic flap level gauge 2 through an upper connecting pipeline 3 and a lower connecting pipeline 4, respectively, and the medium in the container 1 is introduced into the magnetic flap level gauge 2 through the lower connecting pipeline 4, and the upper connecting pipeline 3 ensures the connection between the air above the container 1 and the magnetic flap level gauge 2, and ensures that the internal air pressure of the container 1 and the magnetic flap level gauge 2 is consistent, so that the container 1 and the magnetic flap level gauge 2 form a communicating vessel. A drain valve 25 is provided at the bottom of the magnetic flap level gauge 2, and the drain valve 25 is used for draining liquid and sewage of the magnetic flap level gauge 2. A second stop valve 41 and a third stop valve 43 are provided on the lower connecting pipeline 4, and the third stop valve 43 is closed and the drain valve 25 is opened, so that the sewage of the magnetic flap level gauge 2 can be discharged without stopping production. A drainage pipeline 5 connected to the lower connecting pipeline 4 is provided between the second stop valve 41 and the third stop valve 43, and a fourth stop valve 51 is provided on the drainage pipeline 5. Close the drain valve 25 and the second stop valve 41, open the third stop valve 43 and the fourth stop valve 51, and drain and dredge the magnetic flap level gauge 2 and the lower connecting pipeline 4 between the drainage pipeline 5 and the magnetic flap level gauge 2. Close the third stop valve 43, open the second stop valve 41 and the fourth stop valve 51, and drain and dredge the lower connecting pipeline 4 between the drainage pipeline 5 and the container 1. Close the fourth stop valve 51, open the second stop valve 41, the third stop valve 43 and the drain valve 25, and drain and dredge the magnetic flap level gauge 2 and the lower connecting pipeline 4.

[0037] See also Figure 1In another feasible embodiment of the present invention, the following is adaptively modified according to the situation. It includes a container 1, which is connected to the magnetic flap level gauge 2 through an upper connecting pipeline 3 and a lower connecting pipeline 4, respectively. A drain valve 25 is provided at the bottom of the magnetic flap level gauge 2, and a second stop valve 41 and a third stop valve 43 are provided on the lower connecting pipeline 4. A drainage pipeline 5 connected to the lower connecting pipeline 4 is provided between the second stop valve 41 and the third stop valve 43, and a fourth stop valve 51 is provided on the drainage pipeline 5. The medium in the container 1 is introduced into the magnetic flap level gauge 2 through the lower connecting pipeline 4, and the upper connecting pipeline 3 ensures the connection between the air above the container 1 and the magnetic flap level gauge 2, ensures that the internal air pressure of the container 1 and the magnetic flap level gauge 2 is consistent, so that the container 1 and the magnetic flap level gauge 2 form a communicating vessel, and ensures that the liquid levels in the container 1 and the magnetic flap level gauge 2 are always level. The combined use of the drain valve 25, the second stop valve 41, the third stop valve 43 and the fourth stop valve 51 can realize the drainage and sewage discharge of the magnetic flap level gauge and the lower connecting pipe without stopping production. When used specifically, open the second stop valve 41 and the third stop valve 43, close the drain valve 25 and the fourth stop valve 51, and measure the liquid level in the container 1 through the magnetic flap level gauge 2. The sewage discharge process is as follows: close the drain valve 25 and the second stop valve 41, open the fourth stop valve 51 and the third stop valve 43, and discharge the sewage from the magnetic flap level gauge 2 and the drainage pipeline 5 and the lower connecting pipeline 4 between the magnetic flap level gauge 2. Close the third stop valve 43, open the second stop valve 41 and the fourth stop valve 51, and drain and dredge the lower connecting pipeline 4 between the drainage pipeline 5 and the container 1. Close the fourth stop valve 51, open the second stop valve 41, the third stop valve 43 and the drain valve 25, and the sewage discharge of the magnetic flap level gauge 2 and the lower connecting pipeline 4 can be realized. Close the fourth stop valve 51 and the second stop valve 41, open the drain valve 25, and drain the magnetic flap level gauge 2. Close the third stop valve 43, open the drain valve 25, and drain the magnetic flap level gauge 2.

[0038] Embodiment 1:

[0039] See also Figure 1 The present embodiment discloses a closed drainage system for a magnetic flap level gauge, including a container 1, which is connected to a magnetic flap level gauge 2 through an upper connecting pipeline 3 and a lower connecting pipeline 4, respectively. A drain valve 25 is provided at the bottom of the magnetic flap level gauge 2, and a second stop valve 41 and a third stop valve 43 are provided on the lower connecting pipeline 4. A drainage pipeline 5 connected to the lower connecting pipeline 4 is provided between the second stop valve 41 and the third stop valve 43, and a fourth stop valve 51 is provided on the drainage pipeline 5.

[0040] The container 1 is provided with a liquid phase pipeline 6 connected with the inside of the container 1, the lower connecting pipeline 4 is connected with the liquid phase pipeline 6 through the drainage pipeline 5, and the liquid phase pipeline 6 is provided with a fifth stop valve 61. The fifth stop valve 61 is opened to discharge the medium in the container 1 through the liquid phase pipeline 6. The fifth stop valve 61 is closed, the fourth stop valve 51 is opened, and the liquid discharged through the fourth stop valve 51 enters the liquid phase pipeline 6 and is discharged through the liquid phase pipeline 6. For example, the sewage valve 25 and the second stop valve 41 can be closed, the fourth stop valve 51 and the third stop valve 43 can be opened, and the liquid in the magnetic flap level gauge 2 enters the liquid phase pipeline 6 through the lower connecting pipeline 4 and the drainage pipeline 5 and is discharged through the liquid phase pipeline 6, which can prevent the excessive liquid pressure in the magnetic flap level gauge 2 from causing high-pressure medium to injure people and oil splashing, and solve the problem of high-pressure medium injuring people and oil splashing during the sewage discharge process of the magnetic flap level gauge.

[0041] The liquid phase pipeline 6 is provided with a second three-way joint 62 for connecting to the discharge pipeline 5 , and the fifth stop valve 61 is located between the second three-way joint 62 and the container 1 .

[0042] Embodiment 2:

[0043] See also Figure 1 The present embodiment discloses a closed drainage system for a magnetic flap level gauge, including a container 1, which is connected to a magnetic flap level gauge 2 through an upper connecting pipeline 3 and a lower connecting pipeline 4, respectively. A drain valve 25 is provided at the bottom of the magnetic flap level gauge 2, and a second stop valve 41 and a third stop valve 43 are provided on the lower connecting pipeline 4. A drainage pipeline 5 connected to the lower connecting pipeline 4 is provided between the second stop valve 41 and the third stop valve 43, and a fourth stop valve 51 is provided on the drainage pipeline 5.

[0044] The magnetic flap level gauge 2 comprises a float 21 , in which a magnetic float 23 is arranged.

[0045] The magnetic flap level gauge 2 is provided with a display panel 22 and a positioning clamp 26 .

[0046] Embodiment three:

[0047] See also Figure 1 The present embodiment discloses a closed drainage system for a magnetic flap level gauge, including a container 1, which is connected to a magnetic flap level gauge 2 through an upper connecting pipeline 3 and a lower connecting pipeline 4, respectively. A drain valve 25 is provided at the bottom of the magnetic flap level gauge 2, and a second stop valve 41 and a third stop valve 43 are provided on the lower connecting pipeline 4. A drainage pipeline 5 connected to the lower connecting pipeline 4 is provided between the second stop valve 41 and the third stop valve 43, and a fourth stop valve 51 is provided on the drainage pipeline 5.

[0048] The magnetic flap level gauge 2 is connected to the drain valve 25 via a convex flange cover 24 .

[0049] Embodiment 4:

[0050] See also Figure 2 Based on the above embodiment, the drain valve 25 of this embodiment is connected to the waste liquid tank 7 through the drain hose 8. By opening the drain valve 25, the high-pressure medium in the magnetic flap level gauge 2 can be discharged into the waste liquid tank 7 through the drain hose 8, which can be used to prevent the high-pressure medium from injuring people and splashing oil during the drainage process of the magnetic flap level gauge.

[0051] The waste liquid tank 7 comprises a tank body 71 , on which a movable handle 74 and a plurality of supporting legs 72 are provided, on which casters 73 are provided, and a drain valve 75 is arranged at the bottom of the tank body 71 .

[0052] Embodiment five:

[0053] See also Figure 1 The present embodiment discloses a closed drainage system for a magnetic flap level gauge, including a container 1, which is connected to a magnetic flap level gauge 2 through an upper connecting pipeline 3 and a lower connecting pipeline 4, respectively. A drain valve 25 is provided at the bottom of the magnetic flap level gauge 2, and a second stop valve 41 and a third stop valve 43 are provided on the lower connecting pipeline 4. A drainage pipeline 5 connected to the lower connecting pipeline 4 is provided between the second stop valve 41 and the third stop valve 43, and a fourth stop valve 51 is provided on the drainage pipeline 5.

[0054] A first stop valve 31 is arranged on the upper connecting pipeline 3 .

[0055] Embodiment five:

[0056] See also Figure 2 This embodiment discloses a closed liquid discharge system of a magnetic flap level gauge, which includes eight parts: a container 1, a magnetic flap level gauge 2, an upper connecting pipeline 3, a lower connecting pipeline 4, a liquid discharge pipeline 5, a liquid phase pipeline 6, a waste liquid tank 7, and a liquid discharge hose 8. The upper connecting pipeline 3 is arranged at the top of the container 1, and the lower connecting pipeline 4 and the liquid phase pipeline 6 are arranged at the bottom of the container 1 and in the same chamber. The magnetic flap level gauge 2 is composed of six parts: a float 21, a display panel 22, a magnetic float 23, a convex flange cover 24, a drain valve 25, and a positioning clamp 26.

[0057] A first stop valve 31 is provided on the upper connecting pipeline 3. A drain pipeline 5 is provided on the lower connecting pipeline 4, and the drain pipeline 5 connects the lower connecting pipeline 4 and the liquid phase pipeline 6. A fourth stop valve 51 is installed on the drain pipeline 5. A first three-way joint 42 is installed on the lower connecting pipeline 4, and a second stop valve 41 and a second stop valve 43 are respectively installed on the pipelines in front and behind the first three-way joint 42. A second three-way joint 62 is installed on the liquid phase pipeline 6, and a fifth stop valve 61 is installed on the pipeline in front of the second three-way joint 62.

[0058] The magnetic flap level gauge 2 is connected to the waste liquid tank 7 through a drainage hose 8. The drainage hose 8 is connected to the magnetic flap level gauge 2 and the waste liquid tank 7 through threads. The waste liquid tank 7 consists of a tank body 71, a support leg 72, a caster 73, a movable handle 74, and a drain valve 75.

[0059] Figure 1 This is a schematic diagram of the closed drainage of the lower connecting pipe of the magnetic flap level gauge. Close the fifth stop valve 61 of the liquid phase pipeline, open the fourth stop valve 51 of the drainage pipeline, so that the liquid phase stops along Figure 1 The liquid flows in the direction of the red arrow, thus draining the liquid from the connecting pipe below the magnetic flap level gauge.

[0060] Figure 2 This is a schematic diagram of the closed drainage system of the magnetic flap level gauge. Close the first stop valve 31 on the upper connecting pipeline, close the third stop valve 43 on the lower connecting pipeline, connect the drainage hose 8 to the magnetic flap level gauge drain valve 25 and the waste liquid tank 7 through a threaded connection, and finally open the magnetic flap level gauge drain valve 25 to achieve the purpose of closed drainage of the magnetic flap level gauge.

[0061] After the drainage is completed, the drainage hose 8 is removed, the magnetic flap level gauge 2 is put into operation, and the waste liquid in the waste liquid tank 7 is drained through the drain valve 75.

[0062] The design is simple in structure and easy to operate. While realizing the function of draining the connecting pipe under the container, the entire drainage process is carried out in a closed environment. On the one hand, it solves the problem that the connecting pipe under the container cannot drain and is easily blocked, causing inaccurate measurement of the liquid level meter. On the other hand, it solves the problem that the liquid level meter discharges into the air, causing environmental pollution, and possible fire and explosion hazards.

[0063] Based on the above structure, the present invention also discloses a working method of a closed liquid discharge system of a magnetic flap level gauge, comprising the following steps:

[0064] Open the second stop valve 41 and the third stop valve 43, close the drain valve 25 and the fourth stop valve 51, and measure the liquid level in the container 1 by the magnetic flap level gauge 2;

[0065] The sewage discharge process is as follows:

[0066] Close the drain valve 25 and the second stop valve 41, open the fourth stop valve 51 and the third stop valve 43, and drain the magnetic flap level gauge 2 and the lower connecting pipeline 4 between the drain pipeline 5 and the magnetic flap level gauge 2;

[0067] Close the third stop valve 43, open the second stop valve 41 and the fourth stop valve 51, and clear the lower connecting pipeline 4 between the drainage pipeline 5 and the container 1;

[0068] Close the fourth stop valve 51, open the second stop valve 41, the third stop valve 43 and the drain valve 25, so as to drain the magnetic flap level gauge 2 and the lower connecting pipeline 4;

[0069] Close the fourth stop valve 51 and the second stop valve 41, open the drain valve 25, and drain the magnetic flap level gauge 2;

[0070] Close the third stop valve 43 , open the drain valve 25 , and drain the magnetic flap level gauge 2 .

[0071] In another feasible embodiment of the present invention, the following is adaptively modified according to the situation. During normal operation, the second stop valve 41 and the third stop valve 43 are opened, the drain valve 25 and the fourth stop valve 51 are closed, and the liquid level in the container 1 is measured by the magnetic flap level gauge 2. The sewage discharge process is as follows: close the drain valve 25 and the second stop valve 41, open the fourth stop valve 51 and the third stop valve 43, and discharge the sewage from the magnetic flap level gauge 2 and the lower connecting pipeline 4 between the drainage pipeline 5 and the magnetic flap level gauge 2, so as to achieve the drainage and sewage discharge of the magnetic flap level gauge and the lower connecting pipe without stopping production. Close the third stop valve 43, open the second stop valve 41 and the fourth stop valve 51, and drain and dredge the lower connecting pipeline 4 between the drainage pipeline 5 and the container 1; close the fourth stop valve 51, open the second stop valve 41, the third stop valve 43 and the drain valve 25, and drain the magnetic flap level gauge 2 and the lower connecting pipeline 4; close the fourth stop valve 51 and the second stop valve 41, open the drain valve 25, and drain the magnetic flap level gauge 2; close the third stop valve 43, open the drain valve 25, and drain the magnetic flap level gauge 2. The present invention can realize the drainage and drainage of the magnetic flap level gauge and the lower connecting pipe through a variety of methods, and can realize the drainage and drainage of the magnetic flap level gauge and the lower connecting pipe without stopping production, which solves the problem that the lower connecting pipe of the container cannot drain and is easy to be blocked, and is simple to operate, practical and reliable.

[0072] The above contents are only for explaining the technical idea of ​​the present invention and cannot be used to limit the protection scope of the present invention. Any changes made on the basis of the technical solution in accordance with the technical idea proposed by the present invention shall fall within the protection scope of the claims of the present invention.

Claims

1. The closed drainage system of the magnetic flap level gauge is characterized by: The invention comprises a container (1), wherein the container (1) is connected to a magnetic flap level gauge (2) through an upper connecting pipeline (3) and a lower connecting pipeline (4), a sewage discharge valve (25) is arranged at the bottom of the magnetic flap level gauge (2), a second stop valve (41) and a third stop valve (43) are arranged on the lower connecting pipeline (4), a liquid discharge pipeline (5) connected to the lower connecting pipeline (4) is arranged between the second stop valve (41) and the third stop valve (43), and a fourth stop valve (51) is arranged on the liquid discharge pipeline (5).

2. The closed liquid discharge system of the magnetic flap level gauge according to claim 1, characterized in that: The container (1) is provided with a liquid phase pipeline (6) which is in communication with the interior of the container (1); the lower communication pipeline (4) is in communication with the liquid phase pipeline (6) via a liquid discharge pipeline (5); and a fifth stop valve (61) is provided on the liquid phase pipeline (6).

3. The closed liquid discharge system of the magnetic flap level gauge according to claim 2, characterized in that: The liquid phase pipeline (6) is provided with a second three-way joint (62) for connecting to the liquid discharge pipeline (5), and the fifth stop valve (61) is located between the second three-way joint (62) and the container (1).

4. The closed liquid discharge system of the magnetic flap level gauge according to claim 1, characterized in that: The magnetic flap liquid level gauge (2) comprises a float (21), in which a magnetic float (23) is arranged.

5. The closed liquid discharge system of the magnetic flap level gauge according to claim 4, characterized in that: The magnetic flap liquid level gauge (2) is provided with a display panel (22) and a positioning clamp (26).

6. The closed liquid discharge system of the magnetic flap level gauge according to claim 5, characterized in that: The magnetic flap liquid level gauge (2) is connected to a drain valve (25) via a convex flange cover (24).

7. The closed liquid discharge system of the magnetic flap level gauge according to claim 6, characterized in that: The drain valve (25) is connected to the waste liquid tank (7) via a drain hose (8).

8. The closed liquid discharge system of the magnetic flap level gauge according to claim 7, characterized in that: The waste liquid tank (7) comprises a tank body (71), the tank body (71) is provided with a movable handle (74) and a plurality of supporting legs (72), the supporting legs (72) are provided with casters (73), and a sewage discharge valve (75) is arranged at the bottom of the tank body (71).

9. The closed liquid discharge system of the magnetic flap level gauge according to claim 1, characterized in that: A first stop valve (31) is arranged on the upper connecting pipeline (3).

10. A method for operating the closed liquid discharge system of a magnetic flap level gauge according to claim 1, characterized in that: The following steps are involved: Open the second stop valve (41) and the third stop valve (43), close the drain valve (25) and the fourth stop valve (51), and measure the liquid level in the container (1) using the magnetic flap level gauge (2); The sewage discharge process is as follows: The drain valve (25) and the second stop valve (41) are closed, and the fourth stop valve (51) and the third stop valve (43) are opened to drain the magnetic flap level gauge (2) and the lower connecting pipeline (4) between the drain pipeline (5) and the magnetic flap level gauge (2); The third stop valve (43) is closed, and the second stop valve (41) and the fourth stop valve (51) are opened to discharge sewage from the lower connecting pipeline (4) between the drainage pipeline (5) and the container (1); The fourth stop valve (51) is closed, and the second stop valve (41), the third stop valve (43) and the sewage discharge valve (25) are opened, so that sewage from the magnetic flap level gauge (2) and the lower connecting pipeline (4) can be discharged; The fourth stop valve (51) and the second stop valve (41) are closed, and the sewage discharge valve (25) is opened to discharge sewage from the magnetic flap liquid level gauge (2); The third stop valve (43) is closed, and the drain valve (25) is opened to drain the waste from the magnetic flap level gauge (2).

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