Capacitive liquid level gauge

Abstract

The utility model discloses a kind of electric capacity liquid level gauges, including capacitive liquid level sensor, the outer surface of capacitive liquid level sensor is equipped with flange cooperation and installation, further include installation mechanism;Installation mechanism: it includes sliding slot, limit rod, movable block, rotating block, internal thread, external thread, auxiliary assembly and limiting component, the outer surface downside of capacitive liquid level sensor is equipped with evenly distributed sliding slot, the top wall of sliding slot is equipped with limit rod, one movable block is slidably connected between four limit rods, the downside of movable block is equipped with adjustable rotating block by limiting component, the inner side wall of rotating block is equipped with internal thread, the outer surface upside of flange is equipped with external thread, internal thread and external thread are threadedly connected between, the electric capacity liquid level gauge, capacitive liquid level gauge and flange are split design, when using, by installation mechanism, the two are assembled together, installation is simple to disassemble, save time and labour, it is convenient for subsequent overhaul and replacement probe.

Description

Technical Field

[0001] This utility model relates to the field of liquid level gauge technology, specifically a capacitive liquid level gauge. Background Technology

[0002] A level gauge is an instrument used to measure the height of a liquid medium in a container. A capacitive level gauge is one type of level gauge. It uses changes in capacitance to measure the liquid height and is widely used in petroleum, chemical, power plant, urban water supply, hydrological exploration and other fields. It can be used to measure the liquid level of highly corrosive media, high temperature and high pressure media, such as acids, alkalis, salts, sewage, liquid ammonia, etc.

[0003] In existing capacitive level gauges, the metal rod of the gauge is usually inserted into the liquid container. The metal rod acts as one electrode of the capacitor, and the container wall acts as the other electrode. The medium between the two electrodes is the liquid and the gas above it. Since the dielectric constant of the liquid and the dielectric constant of the gas above the liquid are different, when the liquid level rises, the total dielectric constant between the two electrodes increases, and the capacitance increases accordingly. When the liquid level falls, the dielectric constant decreases, and the capacitance also decreases. Thus, the liquid level is measured by the change in capacitance.

[0004] Existing capacitive level gauges have the following problems: In order to ensure sealing reliability and installation stability, capacitive level gauges are installed using their own flanges and multiple sets of bolts. However, a large number of bolts are required for installation and disassembly, which is time-consuming and labor-intensive, and inconvenient for subsequent maintenance and probe replacement. Therefore, we propose a new type of capacitive level gauge. Utility Model Content

[0005] The technical problem to be solved by this utility model is to overcome the existing defects and provide a capacitive level gauge. The capacitive level gauge and the flange are designed separately. During use, the two are assembled together by an installation mechanism. The installation and disassembly are simple, saving time and effort, and facilitating subsequent maintenance and probe replacement. This can effectively solve the problems in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a capacitive level gauge, comprising a capacitive level sensor, wherein a flange is fitted on the outer surface of the capacitive level sensor, and further comprising an installation mechanism;

[0007] The installation mechanism includes a chute, limit rods, a movable block, a rotating block, internal threads, external threads, auxiliary components, and a limit component. The lower outer surface of the capacitive level sensor has evenly distributed chute sections. Limit rods are provided on the top walls of the chute sections. A movable block is slidably connected between the four limit rods. An adjustable rotating block is located on the lower side of the movable block via the limit component. Internal threads are provided on the inner wall of the rotating block. External threads are provided on the upper outer surface of the flange. The internal and external threads are threaded together. Auxiliary components are provided inside the chute sections. The capacitive level sensor and the flange are designed as separate units. During use, they are assembled together using the installation mechanism, making installation and disassembly simple, time-saving, labor-saving, and facilitating subsequent maintenance and probe replacement.

[0008] Furthermore, the mounting mechanism also includes springs, and springs are movably sleeved on the outer surface of the limiting rods. The springs are located between the lower surface of the movable block and the upper surface of the horizontal protrusion located in the same groove, which facilitates the reset of the movable block.

[0009] Furthermore, the auxiliary components include a rotating shaft, a baffle plate, a pressure plate, and a clearance groove. The lower inner side of the slide groove is rotatably connected to the baffle plate via the rotating shaft. The lower surface of the movable block is provided with a pressure plate corresponding to the baffle plate. The lower surface of the pressure plate contacts the side of the upper surface of the corresponding baffle plate near the center of the capacitive liquid level sensor. The inner wall of the flange is provided with a clearance groove corresponding to the baffle plate to facilitate auxiliary fixing.

[0010] Furthermore, the limiting component includes a limiting groove and a limiting protrusion. The lower surface of the movable block has a limiting groove, and the upper surface of the rotating block has a limiting protrusion. The limiting protrusion is rotatably connected to the inside of the limiting groove, which facilitates limiting the rotating block.

[0011] Furthermore, the limiting component also includes balls and tracks. Balls are rotatably connected in the evenly distributed ball grooves on the inner and outer side walls of the limiting protrusion. Tracks are provided on the inner and outer side walls of the limiting groove. The balls are in contact with the side walls of adjacent tracks, reducing friction and facilitating the rotation of the rotating block.

[0012] Furthermore, the upper surface of the flange is provided with a protective cover, and the outer surface of the protective cover has uniformly distributed through holes. The metal rod at the lower end of the capacitive liquid level sensor is inserted into the inside of the protective cover, which helps to reduce interference and facilitate measurement.

[0013] Furthermore, a sealing ring is provided in the placement groove on the lower side of the inner wall of the flange. The inner wall of the sealing ring contacts the lower side of the outer surface of the capacitive liquid level sensor. A sealing ring is provided on the lower side of the outer surface of the flange to facilitate sealing.

[0014] Compared with the prior art, the beneficial effects of this utility model are as follows: This capacitive liquid level gauge has the following advantages:

[0015] The capacitive level gauge and flange are designed as separate units. During use, pulling down the rotating block moves the movable block downwards. When the internal thread contacts the external thread, rotating the rotating block engages it with the flange. At this point, the pressure plate moves downwards, pressing against the baffle plate until the end of the baffle plate furthest from the capacitive level sensor contacts the top wall of the clearance groove. The pressure of the rotating block and baffle plate secures the capacitive level sensor and flange together. For disassembly, simply rotate the rotating block in the opposite direction to release the engagement. Under the action of the spring, the movable block moves the pressure plate upwards, releasing the baffle plate and thus disengaging the capacitive level sensor from the flange. The capacitive level sensor can then be directly extracted. The capacitive level gauge is easy to install and disassemble, saving time and effort, and facilitating subsequent maintenance and probe replacement. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of this utility model;

[0017] Figure 2 This is a cross-sectional structural diagram of the present invention;

[0018] Figure 3 This is an enlarged structural diagram of point A of this utility model.

[0019] In the diagram: 1. Capacitive liquid level sensor; 2. Flange; 3. Mounting mechanism; 31. Slide groove; 32. Limiting rod; 33. Movable block; 34. Rotating block; 35. Internal thread; 36. External thread; 37. Auxiliary component; 371. Rotating shaft; 372. Baffle plate; 373. Pressure plate; 374. Clearance groove; 38. Limiting component; 381. Limiting groove; 382. Limiting protrusion; 383. Ball bearing; 384. Track; 39. Spring; 4. Protective cover; 5. Through hole; 6. Sealing ring; 7. Sealing ring. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0021] Please see Figure 1-3This embodiment provides a technical solution: a capacitive level gauge, including a capacitive level sensor 1, a flange 2 fitted on the outer surface of the capacitive level sensor 1, and a mounting mechanism 3. A protective cover 4 is provided on the upper surface of the flange 2, and uniformly distributed through holes 5 are opened on the outer surface of the protective cover 4. A metal rod at the lower end of the capacitive level sensor 1 is inserted into the interior of the protective cover 4. A sealing ring 6 is provided in a placement groove on the lower side of the inner wall of the flange 2, and the inner side wall of the sealing ring 6 contacts the lower side of the outer surface of the capacitive level sensor 1. A sealing ring 7 is provided on the lower side of the outer surface of the flange 2. When the metal rod at the lower end of the capacitive level sensor 1 is inserted into the interior of the protective cover 4, the lower side of the outer surface of the capacitive level sensor 1 contacts the inner side wall of the sealing ring 6. Then, the flange 2 can be aligned with the mounting opening of the liquid container. The outer surface of ring 7 contacts the inner wall of the mounting port. The capacitive liquid level sensor 1 is fixed to the liquid container via flange 2 by bolts. The metal rod at the lower end of the capacitive liquid level sensor 1 is inserted into the liquid. The metal rod is one electrode of the capacitor, and the container wall is the other electrode. The medium between the two electrodes is the liquid and the gas on the surface. Since the dielectric constant of the liquid and the dielectric constant of the gas on the liquid surface are different, when the liquid level rises, the total dielectric constant between the two electrodes increases, and the capacitance increases accordingly. When the liquid level falls, the dielectric constant decreases, and the capacitance also decreases. Thus, the liquid level is measured by the change in capacitance. Due to the presence of through holes 5 on the protective cover 4, the medium in contact with the metal rod at the lower end of the capacitive liquid level sensor 1 can be filtered, allowing only the target liquid to stably contact the metal rod, while blocking interference sources such as bubbles, impurities, and wall residues.

[0022] Mounting mechanism 3 includes a slide 31, a limiting rod 32, a movable block 33, a rotating block 34, an internal thread 35, an external thread 36, an auxiliary component 37, and a limiting component 38. The lower outer surface of the capacitive liquid level sensor 1 has evenly distributed slides 31. Each slide 31 has a limiting rod 32 on its top wall. A movable block 33 is slidably connected between the four limiting rods 32. An adjustable rotating block 34 is located on the lower side of the movable block 33 via the limiting component 38. An internal thread 35 is provided on the inner wall of the rotating block 34. An external thread 36 is provided on the upper outer surface of the flange 2. The internal thread 35 and the external thread 36 are threadedly connected. An auxiliary component 37 is provided inside each slide 31. Mounting mechanism 3 also includes a spring 39. The outer surface of each limiting rod 32 is movably fitted with... There are springs 39, all located between the lower surface of the movable block 33 and the upper surface of the horizontal protrusion located in the same slide groove 31. The auxiliary component 37 includes a rotating shaft 371, a baffle plate 372, a pressure plate 373, and a clearance groove 374. The lower inner side of the slide groove 31 is rotatably connected to the baffle plate 372 through the rotating shaft 371. The lower surface of the movable block 33 is provided with a pressure plate 373 corresponding to the baffle plate 372. The lower surface of the pressure plate 373 contacts the side of the upper surface of the corresponding baffle plate 372 near the center of the capacitive liquid level sensor 1. The inner wall of the flange 2 is provided with a clearance groove 374 corresponding to the baffle plate 372. The limiting component 38 includes a limiting groove 381 and a limiting protrusion 382. A limiting groove 384 is provided on the outer side of the lower surface of the movable block 33. 81. The upper surface of the rotating block 34 is provided with a limiting protrusion 382, ​​which is rotatably connected to the inside of the limiting groove 381. The limiting assembly 38 also includes balls 383 and tracks 384. Balls 383 are rotatably connected in the evenly distributed ball grooves on the inner and outer side walls of the limiting protrusion 382. Tracks 384 are provided on the inner and outer side walls of the limiting groove 381. The side walls of adjacent tracks 384 of the balls 383 are in contact. Then, the rotating block 34 is pulled down. Under the restriction of the limiting rod 32, the rotating block 34 drives the movable block 33 to move downward along the slide groove 31 through the limiting groove 381 and the limiting protrusion 382. At this time, the spring 39 is compressed. When the internal thread 35 contacts the external thread 36, the rotating block 34 is rotated to screw the rotating block 34 onto the flange 2. The upper part of the rotating block 34 causes the limiting protrusion 382 to rotate within the limiting groove 381. The presence of the ball bearing 383 and the track 384 reduces friction, facilitating the rotation of the rotating block 34. The pressure plate 373 moves with the movable block 33, pressing down on the end of the blocking plate 372 closest to the capacitive level sensor 1. This causes the blocking plate 372 to rotate around the pivot 371 until the end of the blocking plate 372 furthest from the capacitive level sensor 1 contacts the top wall of the clearance groove 374. The compression of the rotating block 34 and the blocking plate 372 secures the capacitive level sensor 1 and the flange 2 together. To disassemble the capacitive level sensor 1, simply rotate the rotating block 34 in the opposite direction to release the screw-on fixation to the flange 2. Under the restoring force of the spring 39...The movable block 33 moves the pressure plate 373 upward, releasing the limiting effect on the blocking plate 372. This causes the fixed relationship between the capacitive level sensor 1 and the flange 2 to be released, allowing the capacitive level sensor 1 to be directly pulled out for maintenance.

[0023] The working principle of the capacitive level gauge provided by this utility model is as follows: The metal rod at the lower end of the capacitive level sensor 1 is inserted into the inside of the protective cover 4. At this time, the lower side of the outer surface of the capacitive level sensor 1 is in contact with the inner side wall of the sealing ring 6. Then, the rotating block 34 is pulled down. Under the restriction of the limiting rod 32, the rotating block 34 drives the movable block 33 to move down along the slide groove 31 through the limiting groove 381 and the limiting protrusion 382. At this time, the spring 39 is compressed. When the internal thread 35 contacts the external thread 36, the rotating block 34 is rotated to screw the rotating block 34 onto the flange 2, causing the limiting protrusion 382 to be in the limiting groove 381. The rotating block 34 rotates within 81. Due to the presence of the ball bearings 383 and the track 384, friction is reduced, facilitating the rotation of the rotating block 34. The pressure plate 373 moves with the movable block 33. The movement of the pressure plate 373 presses down on the end of the blocking plate 372 closest to the capacitive liquid level sensor 1, causing the blocking plate 372 to rotate around the rotating shaft 371 until the end of the blocking plate 372 away from the capacitive liquid level sensor 1 contacts the top wall of the clearance groove 374. The compression of the rotating block 34 and the blocking plate 372 fixes the capacitive liquid level sensor 1 and the flange 2 together. Then, the flange 2 can be aligned with the mounting port of the liquid container. The outer surface of the sealing ring 7 contacts the inner wall of the mounting port. The capacitive level sensor 1 is fixed to the liquid container via flange 2 using bolts. The metal rod at the lower end of the capacitive level sensor 1 is inserted into the liquid, acting as one electrode of the capacitor. The container wall acts as the other electrode, and the medium between the two electrodes is the liquid and the gas above it. Because the dielectric constant of the liquid and the gas above the liquid are different, when the liquid level rises, the total dielectric constant between the two electrodes increases, and the capacitance increases accordingly; when the liquid level falls, the dielectric constant decreases, and the capacitance also decreases. Therefore, the liquid level is measured by the change in capacitance. The presence of the through hole 5 on the protective cover 4 can filter the medium that contacts the metal rod at the lower end of the capacitive liquid level sensor 1, allowing only the target liquid to stably contact the metal rod, while blocking interference sources such as air bubbles, impurities, and wall residues. When it is necessary to disassemble the capacitive liquid level sensor 1, simply rotate the rotating block 34 in the opposite direction to release the screw fixation with the flange 2. Under the action of the spring 39's rebound force, the movable block 33 drives the pressure plate 373 to move upward, releasing the limit on the blocking plate 372, thus releasing the fixed relationship between the capacitive liquid level sensor 1 and the flange 2. At this time, the capacitive liquid level sensor 1 can be directly pulled out for maintenance.

[0024] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the content of this utility model specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A capacitive level gauge, comprising a capacitive level sensor (1), wherein a flange (2) is fitted onto the outer surface of the capacitive level sensor (1), characterized in that: It also includes the installation mechanism (3); The installation mechanism (3) includes a chute (31), a limiting rod (32), a movable block (33), a rotating block (34), an internal thread (35), an external thread (36), an auxiliary component (37), and a limiting component (38). The lower side of the outer surface of the capacitive liquid level sensor (1) is provided with a chute (31) that is evenly distributed. The top wall of the chute (31) is provided with a limiting rod (32). A movable block (33) is slidably connected between the four limiting rods (32). An adjustable rotating block (34) is provided on the lower side of the movable block (33) through the limiting component (38). The inner side wall of the rotating block (34) is provided with an internal thread (35). The upper side of the outer surface of the flange (2) is provided with an external thread (36). The internal thread (35) and the external thread (36) are threadedly connected. The interior of the chute (31) is provided with an auxiliary component (37).

2. The capacitive level gauge according to claim 1, characterized in that: The installation mechanism (3) also includes springs (39). Springs (39) are movably sleeved on the outer surface of the limiting rod (32). Springs (39) are located between the lower surface of the movable block (33) and the upper surface of the horizontal protrusion located in the same groove (31).

3. The capacitive level gauge according to claim 1, characterized in that: The auxiliary component (37) includes a rotating shaft (371), a baffle plate (372), a pressure plate (373), and a clearance groove (374). The lower side of the inner side of the slide groove (31) is rotatably connected to the baffle plate (372) through the rotating shaft (371). The lower surface of the movable block (33) is provided with a pressure plate (373) corresponding to the baffle plate (372). The lower surface of the pressure plate (373) is in contact with the upper surface of the corresponding baffle plate (372) on the side close to the center of the capacitive liquid level sensor (1). The inner wall of the flange (2) is provided with a clearance groove (374) corresponding to the baffle plate (372).

4. The capacitive level gauge according to claim 1, characterized in that: The limiting component (38) includes a limiting groove (381) and a limiting protrusion (382). The lower surface of the movable block (33) is provided with a limiting groove (381), and the upper surface of the rotating block (34) is provided with a limiting protrusion (382). The limiting protrusion (382) is rotatably connected to the inside of the limiting groove (381).

5. A capacitive level gauge according to claim 4, characterized in that: The limiting component (38) also includes balls (383) and tracks (384). Balls (383) are rotatably connected in the evenly distributed ball grooves on the inner and outer side walls of the limiting protrusion (382). Tracks (384) are provided on the inner and outer side walls of the limiting groove (381). The balls (383) are in contact with the side walls of adjacent tracks (384).

6. A capacitive level gauge according to claim 1, characterized in that: The upper surface of the flange (2) is provided with a protective cover (4), and the outer surface of the protective cover (4) is provided with uniformly distributed through holes (5). The metal rod at the lower end of the capacitive liquid level sensor (1) is inserted into the interior of the protective cover (4).

7. A capacitive level gauge according to claim 1, characterized in that: A sealing ring (6) is provided in the placement groove on the lower side of the inner wall of the flange (2). The inner wall of the sealing ring (6) is in contact with the lower side of the outer surface of the capacitive liquid level sensor (1). A sealing ring (7) is provided on the lower side of the outer surface of the flange (2).

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