Vacuum automatic sampling system

Abstract

The utility model provides an automatic vacuum sampling system which comprises a sewage pool and a sampling bottle connected with the sewage pool through a first connecting pipe, a sampling electromagnetic valve is arranged on the first connecting pipe, and a liquid level sensor is arranged in the sampling bottle; the air inlet end of the double-pump-head vacuum pump is connected with the sampling bottle through a second connecting pipe, the second connecting pipe is provided with a first discharge pipe communicated to the outside, the first discharge pipe is provided with an air suction electromagnetic valve, the air outlet end of the double-pump-head vacuum pump is connected with the first connecting pipe through a third connecting pipe, and the third connecting pipe is provided with a back flushing electromagnetic valve; the third connecting pipe is provided with a second discharging pipe communicated with the outside, and the second discharging pipe is provided with an air blowing electromagnetic valve. The vacuum pump can prevent the shear force generated by high-speed rotation from influencing the activity of the sludge, other valves can be closed, the sampling electromagnetic valve, the back flushing electromagnetic valve and the air suction electromagnetic valve can be opened, air is introduced into the first connecting pipe, then impurities such as the sludge in the pipeline are cleaned, and the first connecting pipe is prevented from being blocked.

Description

Technical Field

[0001] The utility model relates to a vacuum automatic sampling system, which is applied to the field of sewage tank sampling. Background Art

[0002] In traditional sampling, after the sewage containing activated sludge is transported by a multi-stage pump and a self-priming pump at high speed rotation, it may have a certain impact on the activity and flocculation performance of the sludge. The main manifestations are as follows:

[0003] 1. Sludge activity: High-intensity stirring and shear force may cause a certain impact on the microbial community in the sludge, resulting in the death or inactivation of some microorganisms. However, usually in the sewage treatment system, the operation time of the pump is relatively short, and the impact on sludge activity may be relatively small.

[0004] 2. Flocculation performance: High-speed transportation may have a certain impact on the flocculation performance of the sludge. Violent stirring may break the structure of the sludge flocs, making them more dispersed. This may affect the sedimentation performance of the sludge and the efficiency of pollutant removal.

[0005] 3. The impact on the water sample detection indexes Mlss (mixed liquor suspended solid concentration) and SVI (sludge volume index) may also have a certain degree of change. High-speed transportation may cause the dispersion of sludge particles, thus affecting the measurement result of Mlss. At the same time, the value of SVI may also be affected by the change of the sludge floc structure.

[0006] The degree of these impacts depends on multiple factors, such as the type of pump, operation time, transportation flow rate, sludge characteristics, etc. Therefore, in view of the above problems, the utility model designs a vacuum automatic sampling system. Content of the Utility Model

[0007] The utility model provides a vacuum automatic sampling system, which can effectively solve the above problems.

[0008] The utility model is realized as follows:

[0009] A vacuum automatic sampling system includes:

[0010] A sewage tank,

[0011] A sampling bottle, which is connected to the sewage tank through a first connecting pipe. A sampling solenoid valve is arranged on the first connecting pipe, and a liquid level sensor is arranged in the sampling bottle;

[0012] Double-pump head vacuum pump, the intake end is connected to the sampling bottle through the second connecting pipe. A first discharge pipe leading to the outside is provided on the second connecting pipe. An intake solenoid valve is provided on the first discharge pipe. The outlet end of the double-pump head vacuum pump is connected to the first connecting pipe through the third connecting pipe. A backflush solenoid valve is provided on the third connecting pipe. The third connecting pipe is provided with a second discharge pipe leading to the outside. A blowing solenoid valve is provided on the second discharge pipe.

[0013] As a further improvement, an air separator is provided on the second connecting pipe, and a check valve is provided between the second connecting pipe and the double-pump head vacuum pump.

[0014] As a further improvement, the air separator includes an outer cylinder, a first intake port provided at one end of the outer cylinder, and a first outlet port provided at the other end of the outer cylinder. The intake port is connected to an inner cylinder. A plurality of air-permeable holes are provided on the side wall of the inner cylinder. A filtering part is provided inside the inner cylinder.

[0015] As a further improvement, the third connecting pipe is communicated with an oil-gas separation device. The oil-gas separation device includes a first separator communicated with the outlet end of the double-pump head vacuum pump through the third connecting pipe. The first separator is communicated with a second separator. The second separator is communicated with the first separator through a lubricant connecting pipe. The second separator is communicated with the double-pump head vacuum pump through a lubricant return pipe. The second separator is connected to the first connecting pipe through the third connecting pipe.

[0016] As a further improvement, the second separator includes a separator body, a second intake port and a second outlet port provided on the separator body. The second intake port is connected to the first separator through the third connecting pipe. The second outlet port is connected to the first connecting pipe through the third connecting pipe. A first oil-gas separation chamber is provided inside the separator body. A second oil-gas separation chamber is provided inside the first oil-gas separation chamber. A plurality of oil inlet holes are provided on the side wall of the second oil-gas separation chamber. A lubricant filtering layer is provided inside the second oil-gas separation chamber. The second oil-gas separation chamber is communicated with the lubricant connecting pipe leading to the first separator. The first oil-gas separation chamber is communicated with the lubricant return pipe leading to the double-pump head vacuum pump.

[0017] As a further improvement, the sampling bottle is provided with a bottle cap. A plurality of mounting holes are provided inside the bottle cap. Pipe connectors are threadedly connected to the mounting holes. Sealing rings are provided at the connection between the bottle cap connectors and the mounting holes. The pipe connectors are inserted into the first connecting pipe and / or the second connecting pipe.

[0018] The beneficial effects of the present utility model are:

[0019] (1) The utility model samples through a double-pump head vacuum pump. When sampling is required, the sampling solenoid valve is opened, other valves are closed, the double-pump head vacuum pump and the blowing solenoid valve are opened, so that the gas in the sampling bottle is blown to the outside along the second connecting pipe, reducing the air pressure in the sampling bottle and generating negative pressure. At this time, the sewage in the sewage tank is collected into the sampling bottle through the first connecting pipe. Using a vacuum pump can prevent the shear force generated by high-speed rotation from having a certain impact on the activity and flocculation of the sludge. Using a double-pump head vacuum pump can improve the collection efficiency. In order to prevent too fast collection, a liquid level sensor is set to prevent sewage from flowing into the vacuum pump, causing the vacuum pump to be severely worn or damaged, thereby reducing the service life of the vacuum pump. To prevent the first connecting pipe from being blocked, other valves can also be closed, the sampling solenoid valve, the back-blowing solenoid valve and the suction solenoid valve are opened, and air is introduced into the first connecting pipe to clean the sludge and other debris in the pipeline and prevent the first connecting pipe from being blocked.

[0020] (2) In order to prevent corrosive gases in the sewage from entering the double-pump head vacuum pump and causing the components in the double-pump head vacuum pump to rust and age, thereby affecting the service life of the double-pump head vacuum pump, an air separator is provided on the second connecting pipe. The air separator includes an outer cylinder, a first air inlet provided at one end of the outer cylinder, and a first air outlet provided at the other end of the outer cylinder. The air inlet is connected to an inner cylinder. A plurality of air-permeable holes are provided on the side wall of the inner cylinder, and a filtering part is provided inside the inner cylinder, which can effectively filter the corrosive gases entering the vacuum pump when the double-pump head vacuum pump evacuates.

[0021] (3) Through an oil-gas separation device provided on the connecting pipe, the oil-gas separation device includes a first separator communicated with the air outlet end of the double-pump head vacuum pump through a third connecting pipe. The first separator is communicated with a second separator to separate the lubricating oil in the air and filter the foreign matters therein. The lubricating oil is introduced into the second separator through a lubricant connecting pipe, and then the lubricating oil is secondarily filtered by the second separator and returned to the working chamber of the double-pump head vacuum pump through a lubricant return pipe. Because the working efficiency of the double-pump head vacuum pump is relatively high, during use, the working chamber of the pump body needs to be lubricated frequently, otherwise it will affect the service life of the double-pump head vacuum pump. Using an oil-gas separation device can effectively recover and reuse the lubricating oil, thereby saving costs and increasing the service life of the double-pump head vacuum pump. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the following will briefly introduce the drawings required for use in the embodiments. It should be understood that the following drawings only show some embodiments of the present utility model, and therefore should not be regarded as limiting the scope. For those of ordinary skill in the art, without creative efforts, other related drawings can also be obtained based on these drawings.

[0023] Figure 1 is a schematic structural diagram provided by an embodiment of the present utility model.

[0024] Figure 2 is a schematic structural diagram of a sampling bottle connection structure provided by an embodiment of the present utility model.

[0025] Figure 3 is a schematic structural diagram of an air separator provided by an embodiment of the present utility model.

[0026] Figure 4 is a schematic structural diagram of an oil-gas separation device provided by an embodiment of the present utility model.

[0027] The reference numerals in the drawings are as follows:

[0028] 10, sewage tank;

[0029] 20, sampling bottle; 21, first connecting pipe; 22, liquid level sensor; 23, bottle cap; 231, mounting hole; 24, pipe joint; 25, sealing ring; 26, sampling solenoid valve;

[0030] 30, double pump head vacuum pump; 31, second connecting pipe; 311, check valve; 32, first discharge pipe; 33, suction solenoid valve; 34, third connecting pipe; 35, backflush solenoid valve; 36, second discharge pipe; 37, blowing solenoid valve;

[0031] 40, air separator; 41, outer cylinder; 411, first air inlet; 412, first air outlet; 42, inner cylinder; 421, ventilation hole; 43, filtering part;

[0032] 50, oil-gas separation device; 51, first separator; 52, second separator; 521, separator body; 522, second air inlet; 523, second air outlet; 524, first oil-gas separation chamber; 525, second oil-gas separation chamber; 526, oil inlet hole; 527, lubricant filter layer; 53, lubricant communication pipe; 54, lubricant return pipe. Detailed implementation manners

[0033] To make the objectives, technical solutions, and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present utility model. Apparently, the described embodiments are some, but not all, of the embodiments of the present utility model. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model. Therefore, the following detailed description of the embodiments of the present utility model provided in the drawings is not intended to limit the scope of the present utility model to be protected, but merely represents the selected embodiments of the present utility model.

[0034] In the description of the present utility model, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present utility model, "a plurality of" means two or more unless otherwise specifically defined.

[0035] Refer to Figures 1-2 As shown, a vacuum automatic sampling system includes: a sewage tank 10, a sampling bottle 20, which is connected to the sewage tank 10 through a first connecting pipe 21. A sampling solenoid valve 26 is provided on the first connecting pipe 21. A liquid level sensor 22 is provided in the sampling bottle 20. A double-pump head vacuum pump 30, the intake end of which is connected to the sampling bottle 20 through a second connecting pipe 31. The sampling bottle 20 is provided with a bottle cap 23. A plurality of mounting holes 231 are provided in the bottle cap 23. A pipe joint 24 is threadedly connected to the mounting holes 231. A sealing ring 25 is provided at the connection between the bottle cap 23 joint and the mounting holes 231. The pipe joint 24 is inserted into the first connecting pipe 21 and / or the second connecting pipe 31. A first discharge pipe 32 leading to the outside is provided on the second connecting pipe 31. An intake solenoid valve 33 is provided on the first discharge pipe 32. The outlet end of the double-pump head vacuum pump 30 is connected to the first connecting pipe 21 through a third connecting pipe 34. A backflush solenoid valve 35 is provided on the third connecting pipe 34. A second discharge pipe 36 leading to the outside is provided on the third connecting pipe 34. A blowing solenoid valve 37 is provided on the second discharge pipe 36. An air separator 40 is provided on the second connecting pipe 31. A check valve 311 is provided between the second connecting pipe 31 and the double-pump head vacuum pump 30.

[0036] Refer to Figure 3As shown, the air separator 40 includes an outer cylinder 41, a first air inlet 411 provided at one end of the outer cylinder 41, and a first air outlet 412 provided at the other end of the outer cylinder 41. The air inlet is connected to an inner cylinder 42. A plurality of air permeable holes 421 are provided on the side wall of the inner cylinder 42, and a filtering part 43 is provided inside the inner cylinder 42.

[0037] Referring to Figure 4 As shown, the third connecting pipe 34 is communicated with an oil-gas separation device 50. The oil-gas separation device 50 includes a first separator 51 communicated with the air outlet end of the double-pump head vacuum pump 30 through the third connecting pipe 34. The first separator 51 is communicated with a second separator 52. The second separator 52 is conducted to the first separator 51 through a lubricant connecting pipe 53. The second separator 52 is conducted to the double-pump head vacuum pump 30 through a lubricant return pipe 54. The second separator 52 is connected to the first connecting pipe 21 through the third connecting pipe 34. The second separator 52 includes a separator body 521, a second air inlet 522 and a second air outlet 523 provided on the separator body 521. The second air inlet 522 is connected to the first separator 51 through the third connecting pipe 34. The second air outlet 523 is connected to the first connecting pipe 21 through the third connecting pipe 34. A first oil-gas separation chamber 524 is provided inside the separator body 521. A second oil-gas separation chamber 525 is provided inside the first oil-gas separation chamber 524. A plurality of oil inlet holes 526 are provided on the side wall of the second oil-gas separation chamber 525. A lubricant filtering layer 527 is provided inside the second oil-gas separation chamber 525. The second oil-gas separation chamber 525 is communicated with the lubricant connecting pipe 53 conducted to the first separator 51. The first oil-gas separation chamber 524 is communicated with the lubricant return pipe 54 conducted to the double-pump head vacuum pump 30.

[0038] The above are only the preferred embodiments of the present invention and are not used to limit the present invention. For those skilled in the art, the present invention can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A vacuum automatic sampling system, characterized in that, Comprising: A sewage tank (10), A sampling bottle (20), connected to the sewage tank (10) through a first connecting pipe (21). A sampling solenoid valve (26) is provided on the first connecting pipe (21), and a liquid level sensor (22) is provided in the sampling bottle (20); A double-pump head vacuum pump (30), the intake end of which is connected to the sampling bottle (20) through a second connecting pipe (31). A first discharge pipe (32) leading to the outside is provided on the second connecting pipe (31), and an intake solenoid valve (33) is provided on the first discharge pipe (32). The outlet end of the double-pump head vacuum pump (30) is connected to the first connecting pipe (21) through a third connecting pipe (34). A backflush solenoid valve (35) is provided on the third connecting pipe (34). A second discharge pipe (36) leading to the outside is provided on the third connecting pipe (34), and a blowing solenoid valve (37) is provided on the second discharge pipe (36).

2. The vacuum automatic sampling system according to claim 1, wherein An air separator (40) is provided on the second connecting pipe (31), and a check valve (311) is provided between the second connecting pipe (31) and the double-pump head vacuum pump (30).

3. The vacuum automatic sampling system according to claim 2, characterized in that, The air separator (40) includes an outer cylinder (41), a first air inlet (411) provided at one end of the outer cylinder (41), and a first air outlet (412) provided at the other end of the outer cylinder (41). The air inlet is connected to an inner cylinder (42). A plurality of air permeable holes (421) are provided on the side wall of the inner cylinder (42), and a filtering part (43) is provided inside the inner cylinder (42).

4. A vacuum automatic sampling system according to claim 1, characterized in that, The third connecting pipe (34) is communicated with an oil and gas separation device (50). The oil and gas separation device (50) includes a first separator (51) communicated with the outlet end of the double-pump head vacuum pump (30) through the third connecting pipe (34). The first separator (51) is communicated with a second separator (52). The second separator (52) is communicated with the first separator (51) through a lubricant connecting pipe (53). The second separator (52) is communicated with the double-pump head vacuum pump (30) through a lubricant return pipe (54). The second separator (52) is connected to the first connecting pipe (21) through the third connecting pipe (34).

5. The vacuum automatic sampling system according to claim 4, wherein, The second separator (52) includes a separator body (521), a second air inlet (522) and a second air outlet (523) provided on the separator body (521). The second air inlet (522) is connected to the first separator (51) through a third connecting pipe (34), and the second air outlet (523) is connected to the first connecting pipe (21) through the third connecting pipe (34). Inside the separator body (521), a first oil-gas separation chamber (524) is provided. Inside the first oil-gas separation chamber (524), a second oil-gas separation chamber (525) is provided. A plurality of oil inlet holes (526) are provided on the side wall of the second oil-gas separation chamber (525). A lubricant filter layer (527) is provided inside the second oil-gas separation chamber (525). The second oil-gas separation chamber (525) is communicated with a lubricant communication pipe (53) that is conducted with the first separator (51). The first oil-gas separation chamber (524) is communicated with a lubricant return pipe (54) that is conducted with the double-pump head vacuum pump (30).

6. The vacuum automatic sampling system according to claim 1, wherein The sampling bottle (20) is provided with a bottle cap (23). A plurality of mounting holes (231) are provided inside the bottle cap (23). A pipe joint (24) is threadedly connected to the mounting holes (231). A sealing ring (25) is provided at the connection between the bottle cap (23) joint and the mounting holes (231). The pipe joint (24) is inserted into the first connecting pipe (21) and / or the second connecting pipe (31).

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