A liquid level and density measuring device for a variable density process

Abstract

The utility model discloses a liquid level and density measuring device of variable density technology relates to density measurement field, including the measuring cylinder of containing liquid to be detected and the limiting piece of setting in the measuring cylinder, is provided with the ball and the sphere in the limiting piece, and the measuring cylinder is communicated with the inside of limiting piece, and the liquid of detecting can from the inside of measuring cylinder enter the inside of limiting piece and contact with the ball, is provided with the contact switch spare on the limiting piece, and the contact switch spare is connected with the outside display instrument wire, limiting piece includes the vertical channel of at least three connecting rods surrounding, and the size of vertical channel's section and the size of ball and sphere are adapted, and the sphere is used for liquid level detection, and the ball is used for density detection, the utility model discloses through setting the ball and the sphere and moving up and down in the three prongs rod as the guiding barrel, to reach the purpose of realizing liquid level and density accurate measurement under the high viscosity, high density and negative pressure working condition.

Description

Technical Field

[0001] This utility model relates to the field of density measurement, specifically to a liquid level and density measuring device for a variable density process. Background Technology

[0002] In industries such as petrochemicals and pharmaceuticals, float level gauges are commonly used for liquid level measurement due to their simple structure, low cost, and ease of operation. Traditional float level gauges mainly consist of a float, a guide cylinder, a connecting rod, and a signal output device. Based on Archimedes' principle, the float floats up and down with the liquid level under the influence of buoyancy. The connecting rod transmits the positional changes of the float to the signal output device, thereby achieving liquid level measurement and control. Under normal operating conditions, this type of level gauge provides relatively intuitive and reliable liquid level indication and is suitable for measuring the liquid level of various liquid media. However, as the concentration process proceeds, the physical properties of the medium change significantly, placing higher demands on the performance of the float level gauge.

[0003] Under high viscosity, high density, and negative pressure conditions, existing float level gauges face numerous technical challenges. First, as the medium viscosity increases, the float's movement resistance increases, causing it to fail to respond promptly to level changes, resulting in level lag and reducing the sensitivity and accuracy of level measurement. Second, increased medium density affects the float's buoyancy, altering its equilibrium position and further exacerbating level indication deviations. Furthermore, under negative pressure conditions, the sealing performance of float level gauges is challenged, leading to leaks and affecting measurement stability and reliability. Traditional float level gauges typically use a measuring cylinder or rod to guide the float's movement; however, in high-viscosity media, these structures are prone to material adhesion to the inner walls, ultimately causing float blockage and hindering long-term stable operation. Regarding density measurement, traditional float density switches usually have only one contact; however, during negative pressure concentration processes, fluctuations occur when the material density approaches a predetermined value, leading to inaccurate measurement results. The existence of these problems seriously affects the precise control of the concentration process, which in turn affects product quality and production efficiency. There is an urgent need to improve the existing float level gauge to meet the needs of level and density measurement under high viscosity, high density and negative pressure conditions.

[0004] In view of the above, this application is hereby submitted. Utility Model Content

[0005] The purpose of this invention is to provide a liquid level and density measuring device for variable density processes. By setting a float and a ball to move up and down on a three-pronged rod as a guide barrel, it solves the technical problems of the existing float level gauges being unable to move the float and accurately measuring the density under high viscosity, high density and negative pressure conditions.

[0006] This utility model embodiment is achieved through the following technical solution: This utility model embodiment provides a liquid level and density measuring device for a variable density process, including a measuring cylinder containing the liquid to be tested and a limiting member disposed inside the measuring cylinder. A float is disposed inside the limiting member. The measuring cylinder and the limiting member are in communication. The liquid to be tested can enter the interior of the limiting member from the measuring cylinder and contact the float. The limit component is equipped with a contact switch, which is connected to the wires of an external display instrument; When the liquid to be tested is in its initial state, the float contacts the bottom of the limiting component. As the liquid to be tested is gradually concentrated, the float gradually rises along the limiting component. When the float rises to the same level as the contact switch, the float and the contact switch magnetically engage to connect the circuit of the external display instrument. The limiting component includes a vertical channel formed by at least three connecting rods, the cross-sectional size of which is adapted to the size of the float.

[0007] Optionally, the top of the measuring cylinder is provided with an opening for the insertion of a limiting member, and a connecting flange is provided on the opening. The bottom of the external display instrument is provided with an instrument flange, and each connecting rod is connected to the instrument flange. The instrument flange is also used to connect to the connecting flange. There is a gap between the bottom of the limiting component and the bottom of the measuring cylinder.

[0008] Optionally, each link is a cylindrical hollow structure, with a mounting component inside the hollow structure for limiting the contact switch at a preset height. The hollow structure allows wires connecting the contact switch and the external display instrument to pass through.

[0009] Optionally, the limiting component includes three connecting rods arranged in a circular array, the vertical channel is cylindrical, the float is spherical, and the diameter of the float is adapted to the cross-sectional diameter of the vertical channel.

[0010] Optionally, the limiting component also includes a base plate located at the bottom of the vertical channel, and the base plate is provided with a flow hole.

[0011] Optionally, the base plate includes an annular support body and a support frame, with the support frame disposed within the annular support body and connected to it.

[0012] Optionally, the support frame includes multiple horizontal bars arranged in a ring array, with flow holes formed between adjacent horizontal bars and the ring support body.

[0013] Optionally, three crossbars and three flow holes are provided.

[0014] Optionally, the contact switch includes a first contact switch and a second contact switch, the second contact switch is located above the first contact switch, the height difference between the first contact switch and the second contact switch is a, the height of the float is b, and 1.5b≤a≤4b; Both the first contact switch and the second contact switch are connected to an external display instrument. The first and second contact switches can respectively engage with the magnetic properties of the float to connect the circuit of the external display instrument.

[0015] Optionally, the vertical center lines of the support frame, the limiting component, and the float coincide, and a sphere is also provided inside the limiting component. The density of the sphere is less than the density of the liquid to be detected in its initial state. The cross-sectional size of the vertical channel is adapted to the size of the sphere, and the sphere is used for liquid level detection.

[0016] Compared with the prior art, the embodiments of this utility model have the following advantages and beneficial effects: 1. The liquid level and density measuring device for variable density processes provided in this embodiment of the invention features a float that always floats above the liquid to be tested, enabling liquid level detection. Initially, the float is in contact with the bottom of the limiting component. As the liquid concentrates, its density gradually increases, and the liquid level gradually decreases. The float, based on Archimedes' principle, floats up and down in the liquid according to the changes in liquid level and density. When the float rises to the same level as the contact switch, the contact switch magnetically engages with the float, activating the circuit of the external display instrument, thereby achieving density detection. The at least three-link structure of the limiting component ensures that the float and the ball can only move vertically, avoiding the problem of the float and the ball getting stuck due to lateral movement in high-viscosity liquids. Simultaneously, the vertical channel enclosed by at least three links reduces liquid adhesion within the channel, lowering the risk of float blockage and improving the stability and reliability of the measurement.

[0017] 2. In this embodiment of the invention, by setting the limiting component as three connecting rods arranged in a circular array to form a cylindrical vertical channel, it is ensured that the float and the ball can only move up and down in the vertical direction. The diameter of the float and the ball is adapted to the cross-sectional diameter of the vertical channel, ensuring that the float can move freely within the channel without getting stuck. This structure not only improves the stability of the movement of the float and the ball, but also reduces the friction between the float and the inner wall of the channel, further improving the accuracy and reliability of the measurement.

[0018] 3. In this embodiment of the invention, three crossbars are connected to a ring-shaped support to form a stable structure, ensuring the stability of the base plate at the bottom of the vertical channel. The three flow holes allow the liquid to flow evenly inside and outside the vertical channel, preventing liquid accumulation at the bottom and ensuring measurement accuracy. The ring array arrangement of the crossbars not only enhances the structural strength of the base plate but also ensures uniform liquid flow, further improving the accuracy and reliability of the measurement.

[0019] 4. This embodiment of the invention sets a first contact switch and a second contact switch, respectively located at preset heights along the rising path of the float, with the height difference 'a' between them set to 1.5b ≤ a ≤ 4b. This ensures that the float can sequentially trigger the two contact switches during liquid level changes. Both the first and second contact switches are connected to an external display instrument via wires. When the float rises to the corresponding height, the contact switches magnetically engage with the float, activating the circuit of the external display instrument, which displays the initial and subsequent signals of the liquid level change. This not only improves the accuracy of liquid level measurement but also effectively avoids false triggering caused by bubbles or disturbances generated during the concentration process.

[0020] In general, the liquid level and density measuring device for variable density processes provided by the embodiments of this utility model achieves accurate measurement of liquid level and density under high viscosity, high density and negative pressure conditions by setting a float and a ball to move up and down on a three-pronged lever as a guide barrel. Attached Figure Description

[0021] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 A structural diagram of the liquid level and density measuring device for a variable density process provided in this embodiment of the utility model; Figure 2 A structural diagram of the limiting member provided in an embodiment of this utility model; Figure 3 A structural diagram of the base plate provided for an embodiment of this utility model; Figure 4 A top view of the measuring cylinder provided in an embodiment of this utility model.

[0023] The attached diagram shows the markings and corresponding component names: 1-Measuring cylinder, 2-Limiting component, 3-Float ball, 4-Contact switch, 5-External display instrument, 6-Connecting rod, 7-Opening, 8-Connecting flange, 9-Instrument flange, 10-Base plate, 11-Flow hole, 12-Annular support body, 13-Support frame, 14-Crossbar, 15-First contact switch, 16-Second contact switch. Detailed Implementation

[0024] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can typically be arranged and configured in various different ways.

[0025] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0026] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0027] In the description of this utility model, it should be noted that the terms "first", "second", "third", etc. are used only for distinguishing descriptions and should not be construed as indicating or implying relative importance. Example

[0028] Combined with reference Figure 1 and Figure 2 As shown, this utility model embodiment provides a liquid level and density measuring device for a variable density process, including a measuring cylinder 1 containing the liquid to be tested and a limiting member 2 disposed inside the measuring cylinder 1. A float 3 is disposed inside the limiting member 2. The measuring cylinder 1 and the limiting member 2 are internally connected, allowing the liquid to be tested to enter the limiting member 2 from the measuring cylinder 1 and contact the float 3. A contact switch 4 is disposed on the limiting member 2, and the contact switch 4 is wired to an external display instrument 5. When the liquid to be tested is in its initial state, the float 3 contacts the bottom of the limiting member 2. As the liquid to be tested is gradually concentrated, the float 3 gradually rises along the limiting member 2. When the float 3 rises to the same horizontal height as the contact switch 4, the float 3 and the contact switch 4 magnetically engage to connect the circuit of the external display instrument 5. The limiting member 2 includes a vertical channel formed by at least three connecting rods 6, and the cross-sectional size of the vertical channel is adapted to the size of the float 3. The limiting component 2 also contains a sphere. The density of the sphere is less than the density of the liquid to be detected in its initial state. It is always located above the liquid to be detected (the sphere is not shown in the figure). The cross-sectional size of the vertical channel is adapted to the size of the sphere. The sphere is used for liquid level detection, and the float 3 is used for density detection. The sphere is made of non-magnetic material and does not magnetically cooperate with the contact switch component 4.

[0029] Specifically, the measuring cylinder 1 is used to contain the liquid to be tested, providing a stable measuring environment to ensure that changes in liquid level and density can be accurately detected. The limiting member 2 is used to restrict the movement direction of the float 3, ensuring that the float 3 can only move up and down vertically. The limiting member 2 is internally connected to the measuring cylinder 1, allowing the liquid to freely enter and contact the float 3. According to Archimedes' principle, the float 3 floats up and down in the liquid as the liquid level and density change. The size of the float 3 is adapted to the vertical channel cross-section of the limiting member 2, ensuring that it can move freely within the channel without getting stuck. The contact switch 4 is installed on the limiting member 2 and is used to detect changes in the position of the float 3. When the float 3 rises to the same horizontal height as the contact switch 4, the contact switch 4 and the float 3 magnetically engage, connecting the circuit of the external display instrument 5 to realize the detection of liquid level and density. The external display instrument 5 is used to display the density change.

[0030] For example, in the initial state, the float 3 is in contact with the bottom of the limiting member 2. As the liquid to be tested concentrates, the density of the liquid gradually increases, and the liquid level gradually decreases. The float 3 floats up and down in the liquid according to Archimedes' principle, changing with the liquid level and density. When the float 3 rises to the same level as the contact switch 4, the contact switch 4 magnetically engages with the float 3, connecting the circuit of the external display instrument 5, thereby realizing density detection. The three-link structure 6 of the limiting member 2 ensures that the float 3 can only move vertically, avoiding the problem of the float 3 getting stuck due to lateral movement in high-viscosity liquids. At the same time, the vertical channel enclosed by the three links 6 reduces liquid adhesion within the channel, lowering the risk of float 3 clogging and improving the stability and reliability of the measurement.

[0031] It should be noted that when manufacturing the high-density float 3, the influence of negative pressure on the density of the float 3 should be considered. The density of the float 3 can be appropriately increased to ensure the accuracy of the density switch. Both the float 3 and the limiting member 2 should be polished to further solve the problem of adhesion caused by high viscosity. It should also be noted that the contact principle between the contact switch and the float 3 in this utility model adopts existing technology. The float 3 is a magnetic sphere, and the external display instrument 5 can also be implemented using existing equipment. Since the liquid level detection method is the same as that of existing technology, it will not be described in detail in this utility model embodiment. The inventive point of this utility model embodiment is that at least three connecting rods 6 are combined to form a limiting member 2 to limit the float 3 and the sphere, so as to reduce the problems of adhesion and blockage.

[0032] For example, refer to Figure 1 As shown, measuring cylinder 1 ( Figure 1The structure shown in the figure is only a partial structure (which is the prior art). The top of the structure is provided with an opening 7 for the insertion of the limiting member 2. A connecting flange 8 is provided on the opening 7. The bottom of the external display instrument 5 is provided with an instrument flange 9. Each connecting rod 6 is connected to the instrument flange 9. The instrument flange 9 is also used to connect to the connecting flange 8. There is a gap between the bottom of the limiting member 2 and the bottom of the measuring cylinder 1.

[0033] By providing an opening 7 and a connecting flange 8 at the top of the measuring cylinder 1, and an instrument flange 9 at the bottom of the external display instrument 5, stable installation of the limiting component 2 and reliable connection with the external display instrument 5 are achieved. Each connecting rod 6 is connected to the instrument flange 9, ensuring the electrical and mechanical connection between the limiting component 2 and the external display instrument 5. A gap exists between the bottom of the limiting component 2 and the bottom of the measuring cylinder 1, ensuring free flow of liquid and preventing liquid accumulation at the bottom, thereby improving measurement accuracy and reliability. It should be noted that the connection method between the connecting rod 6 and the instrument flange 9 can be snap-fit, adhesive, threaded connection, or even welding or integrated installation; no restriction is placed here, as long as sufficient connection stability is achieved. The connection method between the connecting flange 8 and the instrument flange 9 is also not limited here; bolts or other methods can be used. The connecting flange 8 mounts the external display instrument 5 at the top of the measuring cylinder 1 and fixes the limiting component 2 inside the measuring cylinder 1.

[0034] In a preferred embodiment of this invention, each connecting rod 6 is a cylindrical hollow structure. Inside the hollow structure is a mounting component for limiting the contact switch 4 at a preset height. The hollow structure allows the wires connecting the contact switch 4 and the external display instrument 5 to pass through. This structure achieves precise positioning of the contact switch 4 and protection of the wires. The hollow structure allows the wires to pass through, ensuring the stability of signal transmission. The mounting component fixes the contact switch 4 at the preset height. When the float 3 rises to this height, the contact switch 4 can be accurately triggered, realizing density detection.

[0035] It should be noted that the specific structure of the mounting components is not limited here. Existing limiting structures can be used to limit the contact switch 4 to a preset height within the hollow structure. For example, threaded fasteners and slotted fasteners are suitable for applications requiring frequent adjustment of the contact position, spring fasteners and magnetic fasteners are suitable for high vibration and impact conditions, and welded fasteners are suitable for fixed-position installations. By appropriately selecting the form of the mounting components, the stability and reliability of the contact switch 4 at the preset height can be ensured, thereby improving the performance of the level and density measuring device. The wires are also guided through the hollow structure, which not only does not affect the limiting effect of the connecting rod 6 on the float 3, but also does not affect the up-and-down movement of the float 3. It should also be noted that in Figure 1 and Figure 2In the diagram, the labeled contact switch 4 indicates the magnetic field recognition range. The actual contact switch 4 is hidden within a single connecting rod 6.

[0036] For ease of understanding, in this embodiment of the invention, the limiting member 2 includes three connecting rods 6 arranged in a circular array. The vertical channel is cylindrical, and the float 3 is spherical, with its diameter adapted to the cross-sectional diameter of the vertical channel. Of course, in other embodiments, the limiting member 2 may include four or five connecting rods 6, etc., and this is not limited here. Returning to this embodiment, by setting the limiting member 2 as three connecting rods 6 arranged in a circular array to form a cylindrical vertical channel, it is ensured that the float 3 can only move up and down vertically. The diameter of the float 3 is adapted to the cross-sectional diameter of the vertical channel, ensuring that the float 3 can move freely within the channel without getting stuck. This structure not only improves the stability of the float 3's movement but also reduces the friction between the float 3 and the inner wall of the channel, further improving the accuracy and reliability of the measurement.

[0037] Furthermore, the limiting member 2 also includes a base plate 10, which is located at the bottom of the vertical channel, and a flow hole 11 is provided on the base plate 10. For example, in combination with... Figure 3 and Figure 4 As shown, the base plate 10 includes an annular support body 12 and a support frame 13. The support frame 13 is disposed inside the annular support body 12 and connected to the annular support body 12.

[0038] Specifically, the base plate 10 supports the float 3 in its initial state, preventing it from detaching from the limiting member 2. The flow hole 11 allows liquid to flow freely inside and outside the vertical channel, preventing liquid accumulation at the bottom and ensuring measurement accuracy. This not only improves the structural strength and stability of the base plate 10 but also prevents liquid accumulation at the bottom through the flow hole 11, further improving measurement accuracy and reliability. It should be noted that the connection method between the base plate 10 and the bottom of each connecting rod 6 is not limited here; it can be adhesive, snap-fit, threaded connection, welding, etc., or even an integral part, as long as sufficient connection stability is achieved. The connection method between the annular support 12 and the support frame 13 can also be adhesive, snap-fit, threaded connection, welding, etc., or even an integral part, and is not limited here.

[0039] In a preferred embodiment of this utility model, the support frame 13 includes multiple horizontal bars 14 arranged in a ring array. A flow hole 11 is formed between two adjacent horizontal bars 14 and the ring support body 12. The number of horizontal bars 14 and flow holes 11 is not limited here and can be set according to actual needs. For example, in this embodiment of the utility model, three horizontal bars 14 and three flow holes 11 are provided. The three horizontal bars 14 are connected to the ring support body 12 to form a stable structure, ensuring the stability of the base plate 10 at the bottom of the vertical channel. The three flow holes 11 allow the liquid to flow evenly inside and outside the vertical channel, preventing liquid accumulation at the bottom and ensuring measurement accuracy. The ring array arrangement of the horizontal bars 14 not only enhances the structural strength of the base plate 10 but also ensures uniform liquid flow, further improving the accuracy and reliability of the measurement.

[0040] Furthermore, the contact switch 4 includes a first contact switch 15 and a second contact switch 16. The second contact switch 16 is located above the first contact switch 15. The height difference between the first contact switch 15 and the second contact switch 16 is a, and the height of the float 3 is b, where 1.5b≤a≤4b. The first contact switch 15 and the second contact switch 16 are both connected to the external display instrument 5. The first contact switch 15 and the second contact switch 16 can respectively magnetically cooperate with the float 3 to connect the circuit of the external display instrument 5.

[0041] By setting the first contact switch 15 and the second contact switch 16 at preset heights along the rising path of the float 3, and setting the height difference 'a' between them to 1.5b≤a≤4b, it is ensured that the float 3 can sequentially trigger the two contact switches during liquid level changes. Both the first contact switch 15 and the second contact switch 16 are connected to the external display instrument 5 via wires. When the float 3 rises to the corresponding height, the contact switches magnetically engage with the float 3, activating the circuit of the external display instrument 5, displaying the initial and subsequent signals of the liquid level change, respectively. This not only improves the accuracy of liquid level measurement but also effectively avoids false triggering caused by bubbles or disturbances generated during the concentration process.

[0042] More preferably, the vertical center lines of the support frame 13, the limiting member 2, and the float 3 coincide, so that the float 3 can move up and down more stably and accurately in the vertical channel.

[0043] In general, the liquid level measurement in this embodiment of the invention uses a low-density sphere for liquid level detection. The float 3 moves up and down in a guide barrel via a three-pronged lever (three connecting rods 6), and the liquid level is controlled by the low-density sphere level gauge. At another interface of the equipment, a high-density float 3 is used as a density switch for detection. The float 3 moves up and down in a guide barrel via the three-pronged lever, and two contact switches are installed at the bottom. The use of two contacts avoids disturbance caused by bubbles generated during concentration. If the lower switch is triggered and the upper switch is triggered again, it indicates that the density has been reached and the concentration process has ended. When manufacturing the high-density float 3, the influence of negative pressure on the float 3's density should be considered; the density of the float 3 can be appropriately increased to ensure the accuracy of the density switch. The float 3, the three-pronged lever, and the bottom connecting parts are all required to be polished to solve the problem of material adhesion due to high viscosity. A three-pronged connection is used at the bottom of the three-pronged lever to reduce material accumulation. The three-pronged design differs from traditional float-type level gauges in that the measuring cylinder 1 and measuring rod of the traditional float-type level gauge are not compatible. The measuring cylinder 1 often accumulates material on its inner wall during use, eventually clogging the float 3 and making it difficult to clean, thus hindering long-term stable operation. Similarly, the measuring rod can also cause clogging of the holes between the float 3 and the measuring rod, making it difficult to clean and preventing long-term stable operation. The three-pronged design reduces clogging between the float 3 and the measuring rod, solves the adhesion problem in the measuring cylinder 1, and facilitates cleaning. Existing technology uses a single contact point. During negative pressure concentration, the float 3 moves upward when the material density reaches a predetermined density, but fluctuates up and down when the density approaches a certain level. This invention, by setting two contact points (upper and lower), ensures that the float 3 continues to move upward when the material density reaches the predetermined density, until it reaches the upper contact point, indicating that the predetermined density has been reached, thus meeting the density measurement requirements.

[0044] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model. It should be noted that the structures or components illustrated in the accompanying drawings are not necessarily drawn to scale, and descriptions of well-known components, processing techniques, and processes are omitted to avoid unnecessarily limiting the utility model.

Claims

1. A liquid level and density measuring device for a variable density process, characterized in that, It includes a measuring cylinder (1) for containing the liquid to be tested and a limiting member (2) disposed inside the measuring cylinder (1). The limiting member (2) is provided with a float (3) and a ball. The measuring cylinder (1) is in communication with the inside of the limiting member (2). The liquid to be tested can enter the inside of the limiting member (2) from the measuring cylinder (1) and come into contact with the float (3) and the ball. The density of the float (3) is greater than the density of the liquid to be tested in its initial state, and the density of the sphere is less than the density of the liquid to be tested in its initial state. The limiting member (2) includes a vertical channel formed by at least three connecting rods (6), the cross-sectional size of which is adapted to the size of the float (3) and the ball; The sphere is used for liquid level detection, and the float (3) is used for density detection.

2. The liquid level and density measuring device for a variable density process according to claim 1, characterized in that, The limiting member (2) is provided with a contact switch (4), and the contact switch (4) is connected to the external display instrument (5) by wires; When the liquid to be tested is in its initial state, the float (3) contacts the bottom of the limiting member (2). As the liquid to be tested is gradually concentrated, the float (3) gradually rises along the limiting member (2). When the float (3) rises to the same level as the contact switch, the float (3) and the contact switch (4) magnetically cooperate to connect the circuit of the external display instrument (5).

3. The liquid level and density measuring device for a variable density process according to claim 2, characterized in that, The top of the measuring cylinder (1) is provided with an opening (7) for inserting the limiting member (2), and a connecting flange (8) is provided on the opening (7). The bottom of the external display instrument (5) is provided with an instrument flange (9). Each of the connecting rods (6) is connected to the instrument flange (9), and the instrument flange (9) is also used to connect to the connecting flange (8). There is a gap between the bottom of the limiting member (2) and the bottom of the measuring cylinder (1).

4. The liquid level and density measuring device for a variable density process according to claim 3, characterized in that, Each of the connecting rods (6) is a cylindrical hollow structure, and the hollow structure is provided with a mounting component for limiting the contact switch (4) at a preset height. The hollow structure allows the wires connecting the contact switch (4) and the external display instrument (5) to pass through.

5. The liquid level and density measuring device for a variable density process according to claim 4, characterized in that, The limiting component (2) includes three connecting rods (6), which are arranged in a ring array. The vertical channel is cylindrical, and the float (3) is spherical. The diameter of the float (3) is adapted to the cross-sectional diameter of the vertical channel.

6. A liquid level and density measuring device for a variable density process according to any one of claims 1-5, characterized in that, The limiting member (2) also includes a base plate (10), which is located at the bottom of the vertical channel and has a flow hole (11) on it.

7. The liquid level and density measuring device for a variable density process according to claim 6, characterized in that, The base plate (10) includes an annular support (12) and a support frame (13), wherein the support frame (13) is disposed inside the annular support (12) and connected to the annular support (12).

8. The liquid level and density measuring device for a variable density process according to claim 7, characterized in that, The support frame (13) includes multiple horizontal bars (14) arranged in a ring array, and a flow hole (11) is formed between two adjacent horizontal bars (14) and the ring support body (12).

9. The liquid level and density measuring device for a variable density process according to claim 8, characterized in that, The crossbar (14) is provided in three parts, and the flow hole (11) is provided in three parts.

10. The liquid level and density measuring device for a variable density process according to claim 1, characterized in that, The contact switch (4) includes a first contact switch (15) and a second contact switch (16), the second contact switch (16) is located above the first contact switch (15), the height difference between the first contact switch (15) and the second contact switch (16) is a, the height of the float (3) is b, 1.5b≤a≤4b; The first contact switch (15) and the second contact switch (16) are both connected to the external display instrument (5); The first contact switch (15) and the second contact switch (16) can respectively magnetically cooperate with the float (3) to connect the circuit of the external display instrument (5).

Images