Device for measuring liquid level in non-transparent container

Abstract

The utility model discloses a liquid level measuring device in a non-transparent container, which comprises a density adjusting device and a pressure sensor, the pressure sensor is fixedly connected with the density adjusting device, the pressure sensor is arranged in the non-transparent container, the pressure sensor is connected with a controller through a communication cable, and the controller is in communication connection with a display. The whole pressure sensor is of a columnar structure. The density adjusting device comprises a shell of a capsule structure, and a through hole penetrating through the upper end and the lower end of the shell is formed in the shell along the axis. The pressure sensor penetrates through the through hole and is fixedly mounted in the shell, and the two ends of the pressure sensor extend out of the upper and lower ends of the shell respectively; the lower end of the pressure sensor is a detection end, and the upper end of the pressure sensor is connected with the controller through a communication cable. The device has the advantages of simple structure, convenience in operation, high measurement efficiency and accurate measurement result.

Description

Technical Field

[0001] The utility model belongs to a liquid level measuring device for non - transparent containers. Background Art

[0002] Chemical plants or pharmaceutical factories often use non - transparent containers to statically settle and / or precipitate specific liquids. After static settlement and / or precipitation, the contents in the container are divided into upper and lower parts. The upper layer of liquid is clear liquid, and the lower layer of liquid is sediment liquid. Generally, the supernatant is taken for use, and the sediment liquid is discarded. Since the container is non - transparent, it is often impossible to determine the liquid level dividing line between the upper supernatant and the lower sediment liquid, which causes difficulties in production process control. There are many electronic liquid level gauges on the market now, and their types include tuning fork vibration type, magnetic float type, pressure type, ultrasonic type, magnetic flap type, etc. However, there is no instrument for measuring the liquid level dividing line. Especially for non - transparent containers, there is still no good solution for measuring the internal liquid level dividing line.

[0003] The Chinese patent document discloses "A multi - density liquid level measuring device" (Publication No. CN219624844U, Publication Date: September 1, 2023). This technology discloses a multi - density liquid level measuring device. Different - density liquids are stored in a solution storage tank. Several pressure sensors are arranged in the solution storage tank. A density regulator is fixed on the pressure sensor. The pressure sensor is connected to a controller through a communication cable, and the controller is communicatively connected to a display. By adjusting the mass of the density regulator, the overall designed density of the pressure sensor and the density regulator is made to be between the densities of adjacent two liquids, and the overall designed density of the pressure sensor and the density regulator in the lowest - layer liquid is greater than the density of the lowest - layer liquid, so that the pressure sensor accurately stays at the liquid - phase layer interface required. According to the buoyancy formula and the formula of the relationship between pressure and liquid level, the liquid level values of each layer of liquid are calculated to achieve accurate measurement of the stratified liquid level. This technology is especially suitable for stratified liquids with high viscosity, poor light transmittance, or similar appearance and indistinguishable by the naked eye in industrial production.

[0004] As Figure 1 shown, in actual use, the density regulator in this technology is a capped hollow bottle body. The pressure sensor is fixedly connected to one side of the capped hollow bottle body, and they are arranged horizontally. Although its weight remains unchanged, its entire bottom area increases, resulting in a relatively slow sinking speed during use and affecting the measurement efficiency. At the same time, adopting the above - mentioned structure, it is an asymmetric structure. The communication cable is connected to the upper end of the pressure sensor arranged on the right side, and the weight of the density regulator on the left side is heavier or lighter than that of the pressure sensor. When the density regulator drives the pressure sensor to sink to the liquid level of the stratified liquid, there is a certain deviation in position, resulting in inaccurate measurement results. Summary of the Utility Model

[0005] The purpose of the present utility model is to provide a liquid level measuring device for non-transparent containers with high measuring efficiency and accurate measuring results in view of the deficiencies of the prior art.

[0006] The technical purpose of the present utility model is achieved by the following technical solutions:

[0007] A liquid level measuring device for non-transparent containers includes a density adjusting device and a pressure sensor. The pressure sensor is fixedly connected to the density adjusting device. The pressure sensor is arranged inside the non-transparent container. The pressure sensor is connected to a controller through a communication cable, and the controller is communicatively connected to a display. The pressure sensor is integrally in a columnar structure. The density adjusting device includes a capsule-shaped housing, and the housing is provided with a through hole penetrating through its upper and lower ends along the axis. The pressure sensor passes through the through hole and is fixedly installed in the housing, and its two ends respectively extend outside the upper and lower ends of the housing. The lower end of the pressure sensor is a detection end, and the upper end of the pressure sensor is connected to the controller through a communication cable.

[0008] Preferably, upper and lower sealing grooves are respectively arranged on the inner sides of the upper and lower ends of the housing at the through hole, and first sealing rings are respectively arranged in the upper and lower sealing grooves. The inner diameter of the first sealing ring is equivalent to the outer diameter of the pressure sensor, and its outer diameter is equivalent to the inner diameters of the upper and lower sealing grooves.

[0009] Preferably, the housing includes an upper housing and a lower housing which are arranged opposite to each other up and down, and the upper housing and the lower housing are detachably connected.

[0010] Preferably, the upper housing and the lower housing are threadedly connected.

[0011] Preferably, a second sealing ring is arranged at the joint of the upper housing and the lower housing.

[0012] Preferably, the density adjusting device further includes a plurality of weight weights arranged inside the housing.

[0013] Preferably, the weight weights are steel balls with the same weight.

[0014] Preferably, the weight of the steel ball is 0.1 g or 0.2 g.

[0015] Compared with the prior art, the beneficial effects of the present utility model are:

[0016] 1. The housing of the density adjustment device of the present utility model is in a capsule structure. The lower end of the housing is the end immersed in the liquid in the non-transparent container, and the area of its end is small. Under the condition of unchanged volume and weight, the small volume of the lower end face of the housing will reduce the buoyancy. Therefore, the density adjustment device adopting this technical measure will drive the pressure sensor to sink faster, thereby improving the measurement efficiency. At the same time, after the density adjustment device and the pressure sensor are combined together, a symmetrical structure is formed. When the density adjuster drives the pressure sensor to sink to the junction of the upper liquid and the lower liquid, the position will not shift, thus ensuring the measurement accuracy.

[0017] 2. The weight weights in the housing of the density adjustment device of the present utility model are steel balls with the same weight. Adopting this technical measure has the advantages of simple structure, convenient operation, high efficiency and flexible use. Brief Description of the Drawings

[0018] Figure 1 is a schematic structural diagram of the prior art;

[0019] Figure 2 is a schematic structural diagram of the present utility model;

[0020] Figure 3 is a schematic structural diagram of the density adjustment device and the pressure sensor of the present utility model;

[0021] Figure 4 is Figure 3 a cross-sectional view of;

[0022] Figure 5 is Figure 3 a schematic structural diagram of the upper housing in;

[0023] Figure 6 is Figure 5 a cross-sectional view of;

[0024] Figure 7 is Figure 3 a schematic structural diagram of the middle and lower housing in;

[0025] Figure 8 is Figure 7 a cross-sectional view of;

[0026] Reference Signs: 1 - Pressure Sensor; 11 - Detection Part;

[0027] 2 - Housing; 21 - Upper Housing; 211 - Upper Through Hole; 212 - Upper Side Sealing Groove; 213 - Boss; 22 - Lower Housing; 221 - Lower Through Hole; 222 - Lower Side Sealing Groove; 223 - Groove;

[0028] 3 - First Sealing Ring;

[0029] 4 - Second Sealing Ring

[0030] 5 - Communication cable;

[0031] 6 - Controller;

[0032] 7 - Display;

[0033] 8 - Opaque container; 81 - Upper liquid; 82 - Lower liquid. Detailed implementation manner

[0034] 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 with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are some, but not all, of the embodiments of the present utility model. Generally, the components of the embodiments of the present utility model described and illustrated herein can be arranged and designed in various different configurations.

[0035] Therefore, the following detailed description of the embodiments of the present utility model provided in the accompanying drawings is not intended to limit the scope of the present utility model to be protected, but merely represents selected embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts fall within the scope of protection of the present utility model.

[0036] It should be noted that: Similar reference numerals and letters denote similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings. In addition, the terms "first", "second", etc. are only used for descriptive distinction and cannot be construed as indicating or implying relative importance.

[0037] As Figure 1 — Figure 8 shown, a liquid level measuring device in an opaque container includes a density adjusting device and a pressure sensor 1. The pressure sensor 1 is fixedly connected to the density adjusting device. The pressure sensor 1 is disposed in the opaque container 8. The pressure sensor 1 is connected to the controller 6 through the communication cable 5. The controller 6 is communicatively connected to the display 7. The pressure sensor 1 is integrally in a columnar structure. The density adjusting device includes a capsule-shaped housing 2. The housing 2 is provided with a through hole penetrating its upper and lower ends along the axis. The pressure sensor 1 passes through the through hole and is fixedly installed in the housing 2, and its two ends respectively extend outside the upper and lower ends of the housing 2. The lower end of the pressure sensor 1 is a detection end. The upper end of the pressure sensor 1 is connected to the controller 6 through the communication cable 5.

[0038] As Figure 2 shown, there are two liquids with different densities in the opaque container 8, namely the upper liquid 81 and the lower liquid 82.

[0039] The housing 2 of the density adjustment device is in the shape of a capsule, and the housing 2 is provided with a through hole penetrating through its upper and lower ends along the axis. The pressure sensor 1 is in the shape of a column. The overall height of the pressure sensor 1 is greater than the height of the housing 2. After the pressure sensor 1 is fixedly installed in the through hole of the housing 2, the axis of the pressure sensor 1 coincides with the axis of the housing 2. After the density adjustment device and the pressure sensor 1 form an integral body, the integral body is a symmetrical structure. When the density adjustment device and the pressure sensor 1 enter the non-transparent container 8, the detection end of the pressure sensor 1 accurately stays at the junction of the upper liquid 81 and the lower liquid 82.

[0040] Specifically, the lower end of the capsule-shaped housing 2 is the end immersed in the liquid in the non-transparent container 8, and its end area is small; under the condition that the volume and weight remain unchanged, the small volume of the lower end face of the housing 2 will reduce the buoyancy; therefore, the sinking speed of the density adjustment device driving the pressure sensor 1 with this technical measure will be relatively fast, thereby improving the measurement efficiency. At the same time, after the density adjustment device and the pressure sensor 1 are combined together, they form a symmetrical structure. When the density regulator drives the pressure sensor 1 to sink to the junction of the upper liquid 81 and the lower liquid 82, the position will not shift, thereby ensuring the measurement accuracy.

[0041] As Figures 1-8 As shown, upper sealing grooves 212 and lower sealing grooves 222 are respectively provided on the inner sides of the upper and lower ends of the housing 2 at the through hole, and first sealing rings 3 are respectively provided in the upper sealing grooves 212 and the lower sealing grooves 222; the inner diameter of the first sealing ring 3 is equivalent to the outer diameter of the pressure sensor 1, and its outer diameter is equivalent to the inner diameter of the upper sealing grooves 212 and the lower sealing grooves 222. In actual use, the pressure sensor 1 is in the shape of a column, and its lower end is the detection end provided with a detection part 11. In this embodiment, the overall height of the pressure sensor 1 is greater than the height of the housing 2. In actual use, if the height of the pressure sensor 1 is less than the height of the housing 2, its whole body can be entirely arranged inside the housing 2, and only the lower detection part 11 extends out of the housing 2. Since the pressure sensor 1 needs to pass through the through holes at the upper and lower ends of the density adjustment device, and since the housing 2 and the pressure sensor 1 are made of hard materials, there is a certain gap between the through hole of the housing 2 and the pressure sensor 1. Therefore, by providing the upper sealing grooves 212 and the lower sealing grooves 222 and the first sealing rings 3, the gap between the through hole of the housing 2 and the pressure sensor 1 is sealed to prevent liquid from entering the interior of the housing 2.

[0042] As Figures 1-8 As shown, the housing 2 includes an upper housing 21 and a lower housing 22 which are oppositely arranged up and down, and the upper housing 21 and the lower housing 22 are detachably connected. Correspondingly, the upper housing 21 and the lower housing 22 of the housing 2 are respectively provided with coaxial upper through holes 211 and lower through holes 221.

[0043] In actual use, the density adjustment device further includes a plurality of weight weights disposed in the housing 2. To facilitate the placement of the weight weights, the housing 2 includes an upper housing 21 and a lower housing 22 which are oppositely arranged up and down. At the same time, the upper housing 21 and the lower housing 22 are detachably connected. Common detachable connection structures include snap fasteners, screw connections, etc.

[0044] In this embodiment, the upper housing 21 and the lower housing 22 are screwed together. Specifically, on the opposite sides of the upper housing 21 and the lower housing 22, there are respectively provided a boss 213 with an external thread and a groove 223 with an internal thread. The boss 213 of the upper housing 21 is inserted into the groove 223 of the lower housing 22 and is screwed together.

[0045] Wherein, a second sealing ring 4 is also provided at the joint of the upper housing 21 and the lower housing 22. That is, a second sealing ring 4 is provided at the groove 223 of the lower housing 22. When the boss 213 of the upper housing 21 is inserted into the groove 223 of the lower housing 22 and screwed together, the upper and lower sides of the second sealing ring 4 respectively abut against the upper side of the groove 223 and the lower side of the boss 213. By adopting this technical measure, the connection gap between the upper housing 21 and the lower housing 22 can be effectively sealed, thereby preventing liquid from entering the housing 2 from the joint.

[0046] In actual use, the liquid levels of multiple stratified liquids need to be measured. For example, when the liquid levels of multiple stratified liquids in a non-transparent container 8 need to be measured; perhaps when the liquid levels of different density liquids in different non-transparent containers 8 need to be measured, the weight of the density adjustment device needs to be adjusted. That is, according to the different densities of the liquids, the weight weights in the density adjustment device are adjusted to correspond to the density of the liquid to be measured, so as to meet the requirements of liquid level measurement.

[0047] In actual use, since the volume of the housing 2 of the density adjustment device remains unchanged, by changing its mass, its density is changed, thereby changing its floating and sinking state in the liquid. The weight weights in the housing 2 of the density adjustment device can be made of fine metal powder particles, etc.

[0048] However, in actual use, when the weight weights are made of fine metal powder particles, they need to be weighed separately and then loaded into the lower housing 22 of the density adjustment device to be evenly arranged in the lower housing 22. However, by adopting this technical measure, the fine metal powder particles need to be weighed separately, which reduces the working efficiency when adjusting the weight of the density adjustment device. At the same time, since the fine metal powder particles have the problem of adhering to the inner side of the housing 2, it is difficult to clean them thoroughly, which to a certain extent affects the accuracy of adjusting the weight of the density adjustment device; if more effort is spent on cleaning the fine metal powder particles inside the housing 2, the working efficiency will be further reduced.

[0049] The weight weights in the housing 2 of the density adjustment device are small balls with the same weight, etc. Specifically, the weight weights are steel balls with the same weight. Among them, the weight of the steel balls is generally 0.1 g or 0.2 g. In actual use, the weight of the steel balls can also be 0.3 g, 0.4 g, etc.

[0050] In actual use, after determining the total weight of the density adjustment device, according to needs, directly count the number of steel balls, and then put the steel balls into the lower housing 22; at the same time, when testing liquids with different densities, if the required weight of the density adjustment device is relatively close, the number of steel balls can be directly increased / decreased. By adopting this technical measure, the process of weighing the total weight of the weight weights is avoided, and the weight can be flexibly adjusted according to needs, which has the advantages of simple structure, convenient operation, high efficiency and flexible use.

[0051] The technical solutions provided by the embodiments of the present invention have been introduced in detail above. Specific examples are used in this article to elaborate on the principles and implementation manners of the embodiments of the present invention. The descriptions of the above embodiments are only applicable to help understand the principles of the embodiments of the present invention; at the same time, for those of ordinary skill in the art, based on the embodiments of the present invention, there will be changes in the specific implementation manners and application scopes. In summary, the content of this specification should not be construed as a limitation to the present invention.

Claims

1. A liquid level measuring device in a non-transparent container, comprising a density adjusting device and a pressure sensor. The pressure sensor is fixedly connected to the density adjusting device. The pressure sensor is arranged in the non-transparent container, and the pressure sensor is connected to a controller through a communication cable. The controller is communicatively connected to a display. It is characterized in that The pressure sensor is integrally in a columnar structure. The density adjusting device includes a capsule-shaped housing, and the housing is provided with a through hole penetrating through its upper and lower ends along the axis. The pressure sensor passes through the through hole and is fixedly installed in the housing, and its two ends respectively extend outside the upper and lower ends of the housing. The lower end of the pressure sensor is a detection end, and the upper end of the pressure sensor is connected to the controller through a communication cable.

2. The liquid level measuring device in the non-transparent container according to claim 1, characterized in that, On the inner sides of the upper and lower ends of the housing at the through hole, an upper sealing groove and a lower sealing groove are respectively provided, and first sealing rings are respectively arranged in the upper sealing groove and the lower sealing groove. The inner diameter of the first sealing ring is equivalent to the outer diameter of the pressure sensor, and its outer diameter is equivalent to the inner diameter of the upper sealing groove and the lower sealing groove.

3. The liquid level measuring device in a non-transparent container according to claim 1 or 2, wherein the housing includes an upper housing and a lower housing which are arranged opposite to each other up and down, and the upper housing and the lower housing are detachably connected.

4. The liquid level measuring device in a non-transparent container according to claim 3, wherein the upper housing and the lower housing are threadedly connected.

5. The liquid level measuring device in a non-transparent container according to claim 3, characterized in that, A second sealing ring is provided at the joint of the upper housing and the lower housing.

6. The liquid level measuring device in the non-transparent container according to claim 1, wherein The density adjusting device further includes a plurality of weight weights arranged in the housing.

7. The liquid level measuring device in a non-transparent container according to claim 6, characterized in that, The weight weights are steel balls with the same weight.

8. The liquid level measuring device in a non-transparent container according to claim 7, characterized in that, The weight of the steel ball is 0.1 g or 0.2 g.

Images