Automatic alarm device for liquid level of liquid in container

Abstract

The utility model provides an automatic alarm device for the liquid level of liquid in a container, which comprises a liquid level detection body, the liquid level detection body comprises a shell with a liquid inlet and an inner container pipe arranged in the shell, a liquid level detection assembly is arranged at the upper part in the inner container pipe, and the bottom end of the inner container pipe is a liquid level detection trigger end; a first floating ball is further arranged in the inner container pipe, after the liquid level in the container to be detected rises to the lower edge of the liquid inlet, liquid to be detected flows into the first space and the second space, buoyancy is applied to the first floating ball, and due to the fact that the size of the second space is small, and the liquid level detection trigger end is arranged below the lower edge of the liquid inlet, the buoyancy is applied to the first floating ball. The first floating ball quickly rises to be in contact with the liquid level detection triggering end, so that the liquid level detection assembly is triggered to give an alarm, and the accuracy of liquid level detection is improved; in addition, due to the fact that the size of the second space is small, the density of the liquid flowing into the second space has little influence on the rising height of the first floating ball, and the liquid level detection device is suitable for liquid level detection of different densities and high in applicability.

Description

Technical Field

[0001] This application relates to the field of liquid level detection technology, specifically to an automatic alarm device for liquid level in a container. Background Technology

[0002] While existing liquid level sensors can meet the requirements of most applications, they all have problems for some specific scenarios. In float-type liquid level sensors, the sensing element primarily detects the position of the float, not the actual liquid level. Due to the large size of the float, the actual liquid level is often not reached when the float enters the sensing element's detection range. Furthermore, when the liquid density changes significantly, the float's height within the liquid also changes considerably. Therefore, due to differences in liquid density, the actual liquid level at which the float reaches the standard level will vary, making it impossible to obtain accurate liquid level information. Summary of the Invention

[0003] In view of the above-mentioned defects or deficiencies in the prior art, this application aims to provide an automatic liquid level alarm device for a container, comprising:

[0004] A container to be tested, wherein the container is used to inject the liquid to be tested;

[0005] A liquid level detection body, the liquid level detection body being fixed to the inner wall of the container to be detected, comprising:

[0006] The housing has a first opening and a second opening along a first direction. The first opening is provided with an upper cap for closing the first opening, and the second opening is provided with a closing component for closing the second opening. The housing has a first space inside, and its sidewall is provided with at least one liquid inlet communicating with the first space.

[0007] The inner tube is disposed in the first space and has a third opening and a fourth opening along the first direction. The upper end cap closes the third opening and has a second space inside. The side wall of the inner tube is provided with a plurality of vent holes distributed along the first direction.

[0008] A liquid level detection component, one end of which penetrates the upper cover and is placed in the second space, and its bottom end has a detection trigger end;

[0009] The first float is placed in the second space, and its outer diameter is smaller than the inner diameter of the inner tube. When the liquid level of the liquid to be detected is flush with the lower edge of the inlet, the liquid to be detected flows into the second space and pushes the first float to contact the detection trigger end, triggering the liquid level detection component to alarm.

[0010] According to the technical solution provided in the embodiments of this application, the detection trigger end is lower than the lower edge of the liquid inlet, or the detection trigger end is flush with the lower edge of the liquid inlet.

[0011] According to the technical solution provided in the embodiments of this application, the vent is located in the inner tube away from the upper end cap. When the first float triggers the liquid level detection component, the liquid to be detected in the inner tube submerges all the vents, and there is a clear area between the liquid level of the liquid to be detected and the detection trigger end.

[0012] According to the technical solution provided in the embodiments of this application, a draining component is also provided. The draining component is used to drain the liquid to be tested in the first space and the second space to the outside of the outer shell when the liquid level of the liquid to be tested drops.

[0013] According to the technical solution provided in the embodiments of this application, the drainage component includes a U-shaped tube, the U-shaped tube includes a first branch tube placed in the first space and a second branch tube disposed outside the outer shell, the opening of the first branch tube is located on the side of the fourth opening close to the sealing component, and the length of the first branch tube is less than the length of the second branch tube.

[0014] According to the technical solution provided in the embodiments of this application, the outer shell is fitted with a lower end cover away from the upper end cover. The lower end cover has a third space communicating with the first space and the second space, and a fifth opening is provided away from the outer shell. There is a fourth space between the bottom end of the inner tube and the bottom end of the outer shell. The sealing component can move along the first direction within the fourth space and the third space.

[0015] According to the technical solution provided in the embodiments of this application, the sealing component is a second float ball. The outer diameter of the second float ball is smaller than the inner diameter of the lower end cover, larger than the inner diameter of the outer shell, and larger than the inner diameter of the fifth opening.

[0016] According to the technical solution provided in the embodiments of this application, the second float is a hollow or solid sphere made of soft elastic material.

[0017] According to the technical solution provided in the embodiments of this application, the first float is a hollow metal float.

[0018] According to the technical solution provided in the embodiments of this application, the liquid level detection component is provided with external threads, and the inner tube and the upper end cap are threadedly connected to the liquid level detection component.

[0019] In summary, this application proposes an automatic liquid level alarm device for a container, comprising a liquid level detection body placed in the container to be detected. The liquid level detection body includes a shell with closed upper and lower openings, a liquid inlet on the shell, and an inner tube disposed within the shell. The upper opening of the inner tube is closed, and a liquid level detection component is disposed at the top of the inner tube, with the bottom end of the liquid level detection component serving as a liquid level detection trigger end. A first float is also disposed within the inner tube. When the liquid level in the container to be detected rises to the lower edge of the liquid inlet, the liquid to be detected flows into a first space and a second space, applying buoyancy to the first float. Since the second space is smaller in volume and the liquid level detection trigger end is located below the lower edge of the liquid inlet, the first float will quickly rise to contact the liquid level detection trigger end, thereby triggering the liquid level detection component to alarm, thus improving the accuracy of liquid level detection. In addition, since the second space is smaller in volume, the density of the liquid flowing into the second space has little effect on the height to which the first float rises. Therefore, this application is applicable to liquid level detection of different densities and has strong applicability. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of the liquid level detection body in the second state provided in the embodiments of this application;

[0021] Figure 2 This is a schematic diagram of the appearance of the liquid level detection body provided in the embodiments of this application;

[0022] Figure 3 An exploded view of the liquid level detection body provided in the embodiments of this application;

[0023] Figure 4 This is a schematic diagram of the structure of the liquid level detection body in its initial state according to an embodiment of this application;

[0024] Figure 5 This is a schematic diagram of the liquid level detection body provided in the embodiment of this application when it is in the first state.

[0025] The text labels in the image represent:

[0026] 1. Outer shell; 11. Liquid inlet; 2. Upper end cap; 3. Lower end cap; 4. Liquid level detection assembly; 41. Main body; 42. Detection section; 5. Drainage assembly; 51. First branch pipe; 52. Second branch pipe; 53. Junction area; 6. Inner liner; 61. Vent hole; 62. Boss; 63. Clear space area; 71. First float; 72. Second float. Detailed Implementation

[0027] The present application will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for illustrative purposes only and are not intended to limit the invention. Furthermore, it should be noted that, for ease of description, only the parts relevant to the invention are shown in the accompanying drawings.

[0028] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. This application will now be described in detail with reference to the accompanying drawings and embodiments.

[0029] As mentioned in the background section, this application proposes an automatic liquid level alarm device for a container, comprising:

[0030] The container to be tested is used to inject the liquid to be tested.

[0031] A liquid level detection body, fixed to the inner wall of the container to be detected, includes:

[0032] The outer casing 1 has a first opening and a second opening along a first direction. The first opening is provided with an upper cover 2 for closing the first opening, and the second opening is provided with a closing component for closing the second opening. The outer casing 1 has a first space inside, and its side wall is provided with at least one liquid inlet 11 communicating with the first space.

[0033] Specifically, the liquid level detection body is cylindrical and fixed vertically. It can be reliably fixed to the inner wall of the container to be detected using clamps, or auxiliary components can be added to fix the liquid level detection body at a stable height. The first direction is vertical. The outer shell 1 is a hollow cylinder. Optionally, both the upper cover 2 and the outer shell 1 are made of metal and coated with polytetrafluoroethylene (PTFE) coating inside and out to prevent contamination by the medium. The upper cover 2 has an internal thread, and the top of the outer shell 1 has an external thread that matches the internal thread. The two are threaded together, so that the upper cover 2 closes the first opening. There are four liquid inlets 11, which are evenly distributed in an array on the side wall of the outer shell 1. All liquid inlets 11 are at the same height.

[0034] The inner tube 6 is located in the first space and has a third opening and a fourth opening along the first direction. The upper end cap 2 closes the third opening. The inner tube has a second space inside. The side wall of the inner tube 6 is provided with a plurality of exhaust holes 61 distributed along the first direction.

[0035] Among them, the inner tube 6 is also cylindrical and is a polytetrafluoroethylene (PTFE) component.

[0036] Liquid level detection component 4, one end of which penetrates the upper end cover 2 and is placed in the second space, and its bottom end has a detection trigger end, which is lower than the lower edge of the liquid inlet 11 or flush with the lower edge of the liquid inlet 11.

[0037] Optionally, the liquid level detection component 4 is a metal detection type waterproof proximity switch. In a preferred embodiment, the liquid level detection component 4 is provided with external threads, and the inner tube 6 and the upper end cap 2 are threadedly connected to the liquid level detection component 4.

[0038] The upper end cap 2 has a first through hole in its middle, with an internal thread inside. The liquid level detection component 4 passes through the first through hole and is threadedly connected to the upper end cap 2. The inner tube 6 has a groove inside its top, with the inner diameter of the groove being larger than the inner diameter of the second space. The liquid level detection component 4 includes a main body 41 and a detection part 42 located at the bottom of the main body 41. The outer diameter of the detection part 42 is smaller than the outer diameter of the main body 41. The main body 41 has an external thread, and the groove has a matching internal thread. The main body 41 is threadedly connected to the groove, and the detection part 42 is placed in the second space. By setting the groove, a boss 62 can be formed on the inner wall of the inner tube 6. The main body 41 is placed on the boss 62, thereby limiting the length of the liquid level detection component 4 screwed into the inner tube 6 and preventing the liquid level detection component 4 from being inserted too deeply.

[0039] The first float 71 is placed in the second space. Its outer diameter is smaller than the inner diameter of the inner tube 6. When the liquid level of the liquid to be detected is flush with the lower edge of the liquid inlet 11, the liquid to be detected flows into the second space and pushes the first float 71 to contact the detection trigger end, triggering the liquid level detection component 4 to alarm.

[0040] Optionally, the first float 71 is a hollow metal float. When the liquid level of the liquid to be detected rises to be flush with the lower edge of the inlet 11, the liquid to be detected enters the first space between the inner tube 6 and the outer shell 1 through the inlet 11, and then enters the second space through the fourth opening, pushing the first float 71 to move upward until its top touches the detection trigger end at the bottom of the liquid level detection component 4, triggering the alarm of the liquid level detection component 4. When the liquid level in the container to be tested reaches the lower edge of the inlet 11, the liquid level detection component 4 will quickly trigger an alarm because the volumes of the first and second spaces are small, i.e., the volume of the liquid to be tested flowing into the liquid level detection body is small, and the detection trigger end is lower than or flush with the lower edge of the inlet 11. This achieves sensitive detection of the liquid level. In addition, because the volume of the liquid to be tested flowing into the liquid level detection body is small, the volume of the liquid to be tested that pushes the first float 71 upward in the second space is even smaller. Therefore, the impact of different densities of the liquid to be tested on the high speed of the first float 71 is small. Thus, this application does not need to consider changing the position of the detection trigger end for liquids of different densities, making it more applicable and convenient.

[0041] In a preferred embodiment, the vent 61 is located at the end of the inner tube 6 away from the upper end cap 2. When the first float 71 triggers the liquid level detection component 4, the liquid to be detected in the inner tube 6 submerges all the vent 61, and there is a clear area 63 between the liquid level of the liquid to be detected and the detection trigger end.

[0042] Specifically, the vent 61 is located at the lower end of the inner tube 6. When the liquid to be tested enters the second space and pushes the first float 71 upward, the air between the surface of the liquid to be tested and the liquid level detection component 4 will be discharged into the first space through the vent 61. When the first float 71 contacts the detection trigger end, the height of the liquid to be tested exceeds the uppermost vent 61, so the air between the surface of the liquid to be tested and the liquid level detection component 4 cannot be discharged, forming a clear area 63. The liquid to be tested compresses the air in the clear area 63, so that the air in the clear area 63 has a certain air pressure. The clear area 63 prevents the liquid to be tested from contacting the liquid level detection component 4, thus avoiding corrosion of the liquid level detection component 4.

[0043] In a preferred embodiment, a drain assembly 5 is also provided, which is used to drain the liquid to be tested in the first space and the second space to the outside of the outer shell 1 when the liquid level of the liquid to be tested drops.

[0044] Specifically, when the liquid to be detected in the first space and the second space is discharged, the first float 71 will gradually move down and detach from the liquid level detection component 4.

[0045] In a preferred embodiment, the drainage assembly 5 includes a U-shaped tube, which includes a first branch tube 51 located in the first space and a second branch tube 52 located outside the outer casing 1. The opening of the first branch tube 51 is located near the fourth opening on the side of the sealing assembly, and the length of the first branch tube 51 is less than the length of the second branch tube 52.

[0046] Specifically, the U-shaped tube is a bent metal tube. During the process of the liquid level of the liquid to be tested in the container being tested decreasing, due to the pressure difference between the inside and outside of the outer shell 1, the liquid to be tested in the first space and the second space will be discharged through the first branch pipe 51 and the second branch pipe 52. In addition, when the liquid level decreases, the air in the clearance area 63 releases pressure, quickly discharging the liquid to be tested in the second space, causing the first float 71 and the liquid level detection component 4 to quickly separate, thus releasing the triggering of the liquid level detection component 4. Further, the junction of the first branch pipe 51 and the second branch pipe 52 is the junction area 53. During the liquid inlet process, the junction area 53 is filled with air. Since the length of the first branch pipe 51 is less than the length of the second branch pipe 52, the bottom opening of the second branch pipe 52 is located at the lower end, and the liquid level height difference formed between the junction area 53 and the opening of the second branch pipe 52 is relatively large. According to the principle of hydrostatics, this height difference will generate a large pressure difference, causing air to flow from the high-pressure junction area 53 to the low-pressure opening of the second branch pipe 52. Air is promptly discharged through the second branch pipe 52, preventing air blockage in the drainage assembly 5 and creating favorable conditions for liquid outflow, allowing the liquid to be smoothly discharged from the drainage assembly 5.

[0047] In a preferred embodiment, the outer shell 1 is fitted with a lower end cover 3 at the end away from the upper end cover 2. The lower end cover 3 has a third space communicating with the first space and the second space, and a fifth opening is provided at the end away from the outer shell 1. There is a fourth space between the bottom end of the inner tube 6 and the bottom end of the outer shell 1. The sealing component can move along the first direction within the fourth space and the third space.

[0048] Specifically, the fourth space is the lower part of the first space. The lower end cover 3 is a metal part with polytetrafluoroethylene coating inside and out to prevent contamination by the medium. The lower end cover 3 is threaded to the bottom of the outer shell 1. When the liquid level rises, it enters the third space through the fifth opening and pushes the sealing component upward. When the liquid level drops, the weight of the sealing component is greater than the buoyancy and it moves downward.

[0049] In a preferred embodiment, the sealing component is a second float 72. The outer diameter of the second float 72 is smaller than the inner diameter of the lower end cover 3, larger than the inner diameter of the outer shell 1, and larger than the inner diameter of the fifth opening. The second float 72 is a hollow or solid sphere made of a soft elastic material.

[0050] Specifically, when the liquid level in the container to be tested rises, the liquid enters the third space through the fifth opening, pushing the second float 72 upward until it contacts the second opening, sealing it. When the liquid level drops, the second float 72 moves downward, detaching from the bottom of the outer shell 1, thereby opening the second opening and allowing the liquid to be tested in the first and second spaces to flow out through the second and fifth openings. This prevents the accumulation of residual liquid.

[0051] Furthermore, when testing suspensions in complex conditions, due to the smaller size of the second space, the suspension stratifies due to gravity, causing smaller particles or liquids with lower density to enter the second space, while larger solid particles enter the first space between the outer shell 1 and the inner tube 6. When the liquid level drops, it is discharged through the second and fifth openings.

[0052] The working principle is as follows:

[0053] The liquid level detection body has an initial state, a first state, and a second state. In the initial state, there is no liquid to be detected in the container, the second float 72 is placed at the bottom of the third space, and the first float 71 is placed above the second float 72. When the liquid level rises, the second float 72 floats up until it abuts against the bottom of the outer shell 1, thereby closing the second opening. At this time, the liquid level detection body is in the first state. When the liquid level continues to rise until it reaches the lower edge of the inlet 11, it enters the first space and the second space through the inlet 11, thereby applying buoyancy to the first float 71. Since the second space is smaller, it pushes the first float 71 upward quickly to trigger the liquid level detection. Component 4, at this time, the top of the first float 71 abuts against the detection trigger end of the liquid level detection component 4, and the liquid level detection body is in the second state; when the liquid level drops below the lower edge of the liquid inlet 11, the liquid to be detected in the first space and the second space is discharged through the drain component 5, the air in the clear area 63 releases pressure, and quickly pushes the first float 71 down, so that it is separated from the liquid level detection component 4 and contacts the trigger of the liquid level detection component 4; when the liquid level drops to the point that its pressure on the second float 72 is less than the weight of the second float 72, the second float 72 moves downward, separates from the outer shell 1, opens the second opening, and the residual liquid in the first space and the second space is discharged through the second opening and the fifth opening.

[0054] The above description is merely a preferred embodiment of this application and an explanation of the technical principles employed. Those skilled in the art should understand that the scope of the invention involved in this application is not limited to technical solutions formed by specific combinations of the above-described technical features, but should also cover other technical solutions formed by arbitrary combinations of the above-described technical features or their equivalents without departing from the inventive concept. For example, technical solutions formed by substituting the above features with (but not limited to) technical features with similar functions disclosed in this application.

Claims

1. An automatic liquid level alarm device for a container, characterized in that, include: A container to be tested, wherein the container is used to inject the liquid to be tested; A liquid level detection body, the liquid level detection body being fixed to the inner wall of the container to be detected, comprising: The outer shell (1) has a first opening and a second opening along a first direction. The first opening is provided with an upper end cap (2) for closing the first opening, and the second opening is provided with a closing component for closing the second opening. The outer shell (1) has a first space inside, and its side wall is provided with at least one liquid inlet (11) communicating with the first space. The inner tube (6) is located in the first space and has a third opening and a fourth opening along the first direction. The upper end cap (2) closes the third opening and has a second space inside. The side wall of the inner tube (6) is provided with a plurality of exhaust holes (61) along the first direction. Liquid level detection component (4), one end of which passes through the upper end cover (2) and is placed in the second space, and its bottom end has a detection trigger end; first float (71), the first float (71) is placed in the second space, and its outer diameter is smaller than the inner diameter of the inner tube (6). When the liquid level of the liquid to be detected is flush with the lower edge of the liquid inlet (11), the liquid to be detected flows into the second space and pushes the first float (71) to contact the detection trigger end, triggering the liquid level detection component (4) to alarm.

2. The automatic liquid level alarm device for a container according to claim 1, characterized in that, The detection trigger end is lower than the lower edge of the liquid inlet, or the detection trigger end is flush with the lower edge of the liquid inlet.

3. The automatic liquid level alarm device for a container according to claim 1, characterized in that, The vent (61) is located at the end of the inner tube (6) away from the upper cover (2). When the first float (71) triggers the liquid level detection component (4), the liquid to be detected in the inner tube (6) submerges all the vents (61), and there is a clear area (63) between the liquid level of the liquid to be detected and the detection trigger end.

4. The automatic liquid level alarm device for a container according to claim 1, characterized in that, It is also provided with a drain assembly (5), which is used to drain the liquid to be tested in the first space and the second space to the outside of the outer shell (1) when the liquid level of the liquid to be tested drops.

5. The automatic liquid level alarm device for a container according to claim 4, characterized in that, The drainage assembly (5) includes a U-shaped tube, which includes a first branch tube (51) placed in the first space and a second branch tube (52) located outside the outer shell (1). The opening of the first branch tube (51) is located on the side of the fourth opening close to the sealing assembly, and the length of the first branch tube (51) is less than the length of the second branch tube (52).

6. The automatic liquid level alarm device for a container according to claim 1, characterized in that, The outer shell (1) is fitted with a lower end cover (3) at the end away from the upper end cover (2). The lower end cover (3) has a third space that communicates with the first space and the second space, and a fifth opening is provided at the end away from the outer shell (1). There is a fourth space between the bottom end of the inner tube (6) and the bottom end of the outer shell (1). The sealing assembly can move along the first direction within the fourth space and the third space.

7. The automatic liquid level alarm device for a container according to claim 6, characterized in that, The sealing component is a second float (72), the outer diameter of which is smaller than the inner diameter of the lower end cover (3), larger than the inner diameter of the outer shell (1), and larger than the inner diameter of the fifth opening.

8. The automatic liquid level alarm device for a container according to claim 7, characterized in that, The second float (72) is a hollow or solid sphere made of soft elastic material.

9. The automatic liquid level alarm device for a container according to claim 1, characterized in that, The first float (71) is a hollow metal float.

10. The automatic liquid level alarm device for a container according to claim 1, characterized in that, The liquid level detection component (4) is provided with external threads, and the inner tube (6) and the upper end cap (2) are threadedly connected to the liquid level detection component (4).

Images