CN219434137U

CN219434137U - Protection device of turbine flowmeter for ballast water sampling

Info

Publication number: CN219434137U
Application number: CN202320273886.1U
Authority: CN
Inventors: 韩阳春; 赵宇; 朱磊; 傅钰婷; 徐金祥
Original assignee: Jiangyin Customs Comprehensive Technical Service Center Jiangsu International Travel Health Care Center Jiangyin Branch Jiangyin Customs Port Outpatient Department
Current assignee: Jiangyin Customs Comprehensive Technical Service Center Jiangsu International Travel Health Care Center Jiangyin Branch Jiangyin Customs Port Outpatient Department
Priority date: 2023-02-21
Filing date: 2023-02-21
Publication date: 2023-07-28
Anticipated expiration: 2033-02-21

Abstract

The utility model provides a protection device of a turbine flowmeter for sampling ballast water. The protecting device of the flowmeter comprises an outer shell and a hollow cavity, wherein a magnetic adsorption mechanism is further arranged in the hollow cavity and used for adsorbing magnetic impurities in fluid without affecting the quantity and activity of organisms in the fluid; the outer shell comprises an upper shell and a lower shell, and the hollow cavity is formed by a closed cavity formed by the upper shell and the lower shell; the end part of the upper shell is provided with a water outlet, and the end part of the lower shell is provided with a water inlet. The flowmeter protecting device can remove magnetic impurities in the ballast water, completely prevent the turbine flowmeter from being blocked by the magnetic impurities and then not working normally, play a role in protecting the turbine flowmeter, and ensure the accuracy of quantitative sampling of the ballast water.

Description

Protection device of turbine flowmeter for ballast water sampling

Technical Field

The utility model relates to a protection device of a turbine flowmeter for sampling ballast water, and belongs to the technical field of ballast water sampling.

Background

The main work of ballast water detection is to quantitatively determine the living organism content in the ballast water, so that the quantity of living organisms in the ballast water is ensured as much as possible during sampling, and the detection result is particularly important. In order to ensure the sampling quality and complete quantitative sampling, the current common practice in ballast water sampling is to connect a flowmeter directly with a sampling pipeline of the ballast water, and meanwhile, any additional filter screen cannot be added on the sampling pipeline, otherwise, incorrect loss of living organisms in the ballast water can be caused, so that the final detection result is inaccurate.

The flow scores used in the current market are as follows: turbine flowmeter, electric magnetic flowmeter, gear flowmeter etc. several types, electric magnetic flowmeter are mostly metallic structure, and heavier and need use external power source, gear flowmeter are also mostly metallic structure, heavy and bulky. Therefore, considering the environmental specificity (such as wharf) of the ballast water sampling operation, the turbine flowmeter is the first flowmeter for ballast water sampling due to portability and environmental adaptability.

The working principle of the turbine flowmeter is that fluid flows through the sensor shell, the blades of the impeller and the flowing direction have a certain angle, the impulse force of the fluid enables the blades to have rotating moment, the blades rotate after overcoming friction moment and fluid resistance, the rotating speed is stable after the moment is balanced, under a certain condition, the rotating speed is in direct proportion to the flow speed, the blades have magnetic conductivity and are positioned in the magnetic field of the signal detector (composed of permanent magnet steel and coils), the rotating blades cut magnetic force lines, the magnetic flux of the coils is periodically changed, thus electric pulse signals are induced at the two ends of the coils, and the signals are amplified and shaped by the amplifier to form continuous rectangular pulse waves with a certain amplitude and can be remotely transmitted to the display instrument to display the instantaneous flow and the cumulative quantity of the fluid. Therefore, since the blades, impellers, etc. of the turbine flowmeter are magnetic, they ensure that the magnetic impurity content in the fluid to be metered is extremely low when in use.

However, since the ballast water comes from the ship, impurities such as iron filings and rust falling off during the pipeline installation, transformation and use of the ship are inevitably mixed. In practical sampling work, a large amount of magnetic impurities exist in ballast water, so that the rotating resistance of the impeller of the turbine flowmeter is changed, the measurement inaccuracy is caused by a light person, the detection result is affected, and even the turbine flowmeter is completely blocked and cannot complete sampling when serious. This presents great difficulties for ballast water sampling personnel and ballast water detection work.

Disclosure of Invention

In order to solve the technical problems, the utility model provides the following technical scheme:

the protecting device of the flowmeter comprises an outer shell and a hollow cavity, wherein a magnetic adsorption mechanism is further arranged in the hollow cavity and used for adsorbing magnetic impurities in fluid without affecting the quantity and activity of organisms in the fluid;

the outer shell comprises an upper shell and a lower shell, and the hollow cavity is formed by a closed cavity formed by the upper shell and the lower shell;

the end part of the upper shell is provided with a water outlet, and the end part of the lower shell is provided with a water inlet.

According to an embodiment of the utility model, the outer housing is a detachable structure.

According to an embodiment of the utility model, a branch pipe is further arranged on the upper shell and/or the lower shell, and the included angle between the axis of the branch pipe and the water flow direction is smaller than 90 degrees.

According to an embodiment of the utility model, the hollow cavity is a cylinder, and the axial direction of the cylinder is the water flow direction.

According to an embodiment of the utility model, the hollow cavity is of an elongated structure.

According to an embodiment of the utility model, the relation between the inner diameter D of the hollow cavity and the height L of the hollow cavity is L/D > 1.

According to an embodiment of the utility model, the water outlet and the water inlet are connected into a sampling pipe of the ballast water.

According to an embodiment of the utility model, the central axes of the water outlet and the water inlet are located on the axis of the hollow cavity.

According to an embodiment of the utility model, the cross-sectional area of the water outlet is not smaller than the cross-sectional area of the water inlet.

According to an embodiment of the utility model, the magnetic attraction means comprises at least one or more attraction units.

According to embodiments of the present utility model, the magnetic attraction mechanism may optionally be fixedly or non-fixedly disposed within the hollow cavity.

According to an embodiment of the utility model, the magnetic adsorption mechanism is fixedly arranged in the hollow cavity and comprises a fluid channel and at least one adsorption unit.

Preferably, the central axis of the fluid channel is located on the axis of the hollow cavity, and the adsorption unit is outside the fluid channel.

Preferably, the cross section of the fluid channel is circular; further, the cross-sectional area of the fluid passage is smaller than the cross-sectional area of the hollow cavity and larger than the cross-sectional area of the water inlet.

According to an embodiment of the utility model, the magnetic adsorption mechanism comprises two adsorption units, and the two adsorption units are connected in series.

According to an exemplary scheme of the utility model, the flowmeter protection device comprises an outer shell and a hollow cavity, wherein a magnetic adsorption mechanism is further arranged in the hollow cavity and is used for adsorbing magnetic impurities in fluid without affecting the quantity and activity of organisms in the fluid;

the outer housing includes an upper housing and a lower housing; the hollow cavity is formed by a closed cavity formed by the upper shell and the lower shell; the relation between the inner diameter D of the hollow cavity and the height L of the hollow cavity is L/D & gt 1;

the end part of the upper shell is provided with a water outlet, the end part of the lower shell is provided with a water inlet, and the central axes of the water outlet and the water inlet are positioned on the axis of the hollow cavity; the sections of the water outlet and the water inlet are circular, wherein the inner diameter d1 of the section of the water outlet is larger than or equal to the inner diameter d2 of the section of the water inlet;

the magnetic adsorption mechanism comprises a fluid channel and a ring-shaped magnet; the central axis of the fluid channel is positioned on the axis of the hollow cavity, and the annular magnet is positioned outside the fluid channel; the cross section of the fluid channel is circular, and the cross section area of the fluid channel is smaller than the cross section area of the hollow cavity and larger than the cross section area of the water inlet;

optionally, a branch pipe may be further disposed on the upper housing and/or the lower housing, an angle between an axis of the branch pipe and a water flow direction is less than 90 °, and the optional fixing of the ring magnet is disposed in the branch pipe.

Advantageous effects

Compared with the prior art, the utility model has the advantages that:

1. the flowmeter protecting device has the advantages of simple structure, simple and convenient operation and unlimited repeated use.

2. The magnetic adsorption mechanism is arranged in the flowmeter protecting device, so that magnetic impurities in ballast water can be removed, the turbine flowmeter can be completely prevented from being blocked by the magnetic impurities and then can not work normally when in use, the effect of protecting the turbine flowmeter is achieved, and the accuracy of quantitative sampling of the ballast water can be ensured.

3. The flowmeter protecting device provided by the utility model can not only intercept any organism in the ballast water, but also can not influence the accuracy of the ballast water detection result, and can meet the special requirement of ballast water sampling.

4. The flowmeter protecting device is arranged on the sampling pipeline, so that the fluid resistance of the sampling pipeline is not increased, and the working efficiency is not negatively influenced.

Drawings

FIG. 1 is a schematic diagram of a flow meter protector; wherein, 1, delivery port, 2, upper portion casing, 3, magnetism adsorption equipment, 4, junction, 5, lower part casing, 6, water inlet.

FIG. 2 is a cross-sectional view of the outer housing; wherein 7 is a branch pipe.

Fig. 3 is a schematic view of a magnetic attraction mechanism.

Detailed Description

The technical scheme of the utility model will be further described in detail below with reference to specific embodiments. It is to be understood that the following examples are illustrative only and are not to be construed as limiting the scope of the utility model. All techniques implemented based on the above description of the utility model are intended to be included within the scope of the utility model.

Unless otherwise indicated, the starting materials and reagents used in the following examples were either commercially available or may be prepared by known methods.

The utility model provides a flowmeter protector, as shown in figures 1 and 2, which comprises an outer shell and a hollow cavity, wherein a magnetic adsorption mechanism 3 is arranged in the hollow cavity, and the magnetic adsorption mechanism 3 is used for adsorbing magnetic impurities in fluid without affecting the quantity and activity of organisms in the fluid. Preferably, the magnetic impurities are understood to be substances known in the art, such as iron filings, rust. Illustratively, the fluid is ballast water.

In one embodiment of the utility model, the outer housing is a removable structure. Preferably, the outer housing comprises an upper housing 2 and a lower housing 5. Preferably, the upper housing 2 and the lower housing 5 are fixedly connected by means of screw threads. Further, the upper housing 2 and the lower housing 5 are fixedly connected at a connection point 4 by a screw thread.

In one embodiment of the present utility model, the hollow cavity is formed by a closed cavity formed by the upper housing 2 and the lower housing 5. Preferably, a branch pipe 7 may be further disposed on the upper housing 2 and/or the lower housing 5, an included angle between an axis of the branch pipe 7 and a water flow direction is smaller than 90 °, and a cover body is further disposed at an end of the branch pipe 7, and the cover body is connected with the branch pipe 7 through threads.

In one embodiment of the utility model, the hollow cavity is preferably cylindrical in order to facilitate the flow of ballast water within the hollow cavity. Preferably, the axis direction of the cylinder is the water flow direction.

In one embodiment of the present utility model, the hollow cavity is of an elongated configuration in order to completely remove magnetic impurities from the fluid as it flows through the hollow cavity. Preferably, the relation between the inner diameter D of the hollow cavity and the height L of the hollow cavity is L/D & gt 1. Further preferably 1 < L/D < 5,L/D is for example 2, 3, 4.

In one embodiment of the utility model, the end of the upper housing 2 is provided with a water outlet 1, and the end of the lower housing 5 is provided with a water inlet 6.

In one embodiment of the utility model, the water outlet 1 and the water inlet 6 are connected into a sampling pipeline of the ballast water. Preferably, the water outlet 1 and the water inlet 6 may be constructed as known in the art, and the present utility model is not particularly limited.

In one embodiment of the utility model, the central axes of the water outlet 1 and the water inlet 6 are located on the axis of the hollow cavity.

In one embodiment of the present utility model, in order to increase the residence time of the fluid in the hollow cavity, the cross-sectional area of the water outlet 1 is not smaller than the cross-sectional area of the water inlet 6. Preferably, the sections of the water outlet 1 and the water inlet 6 are all circular, wherein the inner diameter of the section of the water outlet 1 is d1, and the inner diameter of the section of the water inlet 6 is d2. Preferably, d1.gtoreq.d2.

In a specific embodiment of the present utility model, the magnetic adsorption mechanism 3 includes at least one or more adsorption units. The magnetic adsorption mechanism can be optionally fixed or not fixed in the hollow cavity.

In one embodiment of the present utility model, the magnetic adsorption mechanism 3 is fixedly disposed in the hollow cavity, and includes a fluid channel and at least one adsorption unit. Preferably, the central axis of the fluid channel is located on the axis of the hollow cavity, and the adsorption unit is outside the fluid channel. Preferably, the cross section of the fluid channel is circular, preferably the cross section of the fluid channel has an area smaller than the cross section area of the hollow cavity and larger than the cross section area of the water inlet 6. Illustratively, the adsorption unit is selected from a magnet. Further, the magnet is a ring magnet. Specifically, the outer diameter D1 of the ring magnet is smaller than the inner diameter D of the hollow cavity and larger than the inner diameter D2 of the water inlet 6. Specifically, the inner diameter D2 of the ring magnet is not smaller than the inner diameter D2 of the drain opening 1. Specifically, the length of the ring magnet is not greater than the height L of the hollow cavity.

Further, the magnetic adsorption mechanism 3 includes two adsorption units, as shown in fig. 3, which are connected in series. Preferably, the adsorption units are connected in series without contact, for example, a spacing space is formed between two adsorption units. When ballast water passes through the adsorption unit, the adsorption unit adsorbs magnetic impurities in fluid and the magnetic impurities enter an interval space formed by the two adsorption units along the adsorption unit under the flushing action of the fluid, and when the sampling is finished, the magnetic adsorption mechanism 3 is taken out, so that the flowmeter protection device can be cleaned, and the flowmeter protection device is convenient and quick.

In another embodiment of the utility model, the magnetic attraction mechanism is fixed in the hollow cavity, so that the stability of the magnetic attraction mechanism is prevented from being influenced by fluid disturbance. Illustratively, the magnetic attraction mechanism is fixed in the branch pipe 7, and the attraction unit is selected from magnets. In the present utility model, when a magnet is fixed in the branch pipe 7, the shape of the magnet is not particularly limited as long as it can be placed in the branch pipe 7 and the hollow cavity. When ballast water passes through the magnet, the magnet adsorbs magnetic impurities in the fluid and the magnetic impurities enter the branch pipe 7 along the magnet under the flushing action of the fluid, and when the sampling is finished, the cover body of the branch pipe 7 is opened, so that the flowmeter protection device can be cleaned, and the flowmeter protection device is convenient and quick.

In an exemplary embodiment of the present utility model, the flowmeter protection device includes an outer housing and a hollow cavity, wherein a magnetic adsorption mechanism 3 is further disposed in the hollow cavity, and the magnetic adsorption mechanism 3 is used for adsorbing magnetic impurities in a fluid and does not affect the number and activity of organisms in the fluid;

the outer housing comprises an upper housing 2 and a lower housing 5; the hollow cavity is formed by a closed cavity formed by the upper shell 2 and the lower shell 5; the relation between the inner diameter D of the hollow cavity and the height L of the hollow cavity is L/D & gt 1;

the end part of the upper shell 2 is provided with a water outlet 1, the end part of the lower shell 5 is provided with a water inlet 6, and the central axes of the water outlet 1 and the water inlet 6 are positioned on the axis of the hollow cavity; the sections of the water outlet 1 and the water inlet 6 are circular, wherein the inner diameter d1 of the section of the water outlet 1 is larger than or equal to the inner diameter d2 of the section of the water inlet 6;

the magnetic adsorption mechanism 3 comprises a fluid channel and a ring-shaped magnet; the central axis of the fluid channel is positioned on the axis of the hollow cavity, and the annular magnet is positioned outside the fluid channel; the cross section of the fluid channel is circular, and the diameter of the cross section of the fluid channel is smaller than the inner diameter D of the hollow cavity and larger than the inner diameter D2 of the water inlet 6;

the outer diameter D1 of the annular magnet is smaller than the inner diameter D of the hollow cavity and larger than the inner diameter D2 of the water inlet 6; the inner diameter D2 of the annular magnet is not smaller than the inner diameter D2 of the water outlet 1, and the length of the annular magnet is not larger than the height L of the hollow cavity;

optionally, a branch pipe 7 may be further disposed on the upper housing 2 and/or the lower housing 5, an angle between an axis of the branch pipe 7 and a water flow direction is smaller than 90 ° (for example, 10 ° to 85 °, and for example, 40 °, 45 °, 60 °), and the optional fixing of the ring magnet is disposed in the branch pipe 7.

Working principle:

before sampling, the flowmeter protector is arranged at the front end of a sample inlet of the turbine flowmeter, after a sampling valve is opened, ballast water from the interior of a ship enters a hollow cavity of the flowmeter protector from a water inlet 6, when the ballast water flows into the hollow cavity, the ballast water passes through a magnetic adsorption mechanism 3, and magnetic impurities such as scrap iron, rust and the like in the ballast water are attracted by the magnetic adsorption mechanism 3 and fixed on the magnetic adsorption mechanism 3 (for example, when the magnetic adsorption mechanism comprises two adsorption units, the magnetic impurities stay in the interval space mostly, and when the magnetic adsorption mechanism is fixed in a branch pipe 7, the magnetic impurities stay in the branch pipe 7 mostly), and the ballast water after the magnetic impurities are removed flows out from a water outlet 1 and enters the turbine flowmeter, so that the ballast water sampling work is completed. The flowmeter protecting device can prevent magnetic impurities in ballast water from entering the turbine flowmeter, avoid affecting the metering work of the turbine flowmeter, and play a role in effectively protecting the turbine flowmeter.

After the sampling work is finished, the sampling valve is closed, the magnetic adsorption mechanism 3 in the flowmeter protecting device is taken out, magnetic impurities such as scrap iron, rust and the like adsorbed on the magnetic adsorption mechanism 3 are cleaned (when the magnetic adsorption mechanism 3 is fixed in the branch pipe, the branch pipe 7 is also required to be cleaned), and the flowmeter is restored and installed for the next use.

The embodiments of the present utility model have been described above. However, the present utility model is not limited to the above embodiment. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model should be included in the protection scope of the present utility model.

Claims

1. The protection device of the turbine flowmeter for sampling the ballast water is characterized by comprising an outer shell and a hollow cavity, wherein a magnetic adsorption mechanism is further arranged in the hollow cavity and used for adsorbing magnetic impurities in fluid without affecting the quantity and activity of organisms in the fluid;

2. The protective device of claim 1, wherein the outer housing is a removable structure;

and/or, branch pipes are further arranged on the upper shell and/or the lower shell, and the included angle between the axis of each branch pipe and the water flow direction is smaller than 90 degrees.

3. The protection device according to claim 1, wherein the hollow cavity is a cylinder, and an axial direction of the cylinder is a water flow direction;

and/or the hollow cavity is of an elongated structure;

and/or the relation between the inner diameter D of the hollow cavity and the height L of the hollow cavity is L/D & gt 1.

4. The protection device of claim 1, wherein the water outlet and water inlet are connected to a sampling conduit for ballast water.

5. The protection device according to claim 1, wherein the central axes of the water outlet and water inlet are located on the axis of the hollow cavity;

and/or the cross-sectional area of the water outlet is not smaller than the cross-sectional area of the water inlet.

6. The protective device of claim 1, wherein the magnetic attraction mechanism comprises at least one or more attraction units.

7. The protective device of claim 6, wherein the magnetic attraction mechanism is fixedly or non-fixedly disposed within the hollow cavity;

and/or, the magnetic adsorption mechanism is fixedly arranged in the hollow cavity and comprises a fluid channel and at least one adsorption unit.

8. The protective apparatus according to claim 7, wherein a central axis of the fluid passage is located on an axis of the hollow cavity, and the adsorption unit is outside the fluid passage.

9. The protective apparatus of claim 7, wherein the fluid channel is circular in cross-section;

and/or the cross-sectional area of the fluid channel is smaller than the cross-sectional area of the hollow cavity and larger than the cross-sectional area of the water inlet;

and/or the magnetic adsorption mechanism comprises two adsorption units, and the two adsorption units are connected in series.

10. The protection device according to any one of claims 1-9, wherein the relation between the inner diameter D of the hollow cavity and the height L of the hollow cavity is L/D > 1;

the central axes of the water outlet and the water inlet are positioned on the axis of the hollow cavity; the sections of the water outlet and the water inlet are circular, wherein the inner diameter d1 of the section of the water outlet is larger than or equal to the inner diameter d2 of the section of the water inlet;

and the upper shell and/or the lower shell are/is also provided with a branch pipe, the included angle between the axis of the branch pipe and the water flow direction is smaller than 90 degrees, and the annular magnet is fixedly arranged in the branch pipe.