A liquid level sensor

Abstract

This utility model discloses a liquid level sensor, including: a float rail, a float, and a mounting mechanism. A sensing rod is fixed to the back side of the float rail, and an instrument is mounted on the upper end of the sensing rod. The float is slidably disposed within the float rail, and a magnet is detachably installed inside the float. The mounting mechanism is slidably disposed on the float rail and the sensing rod, and includes a support, a locking assembly, a mounting back plate, and a clamping assembly. The support has grooves adapted to the float rail and the sensing rod. The locking assembly is installed between the float rail and the support to lock the support and the sensing rod together. The mounting back plate is installed on the side wall of the support, and a pair of clamping bodies and a pair of fixed shafts are mounted on the support. The clamping assembly is mounted on the pair of fixed shafts. Through its structural design, this utility model allows adjustment of the extension length of the sensing rod according to the depth of different tanks, thereby effectively improving the sensor's practicality.

Description

Technical Field

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

[0002] With the rapid development of modern industry, various sealed containers and equipment are widely used. Real-time monitoring of the liquid level inside the container is very important for this system. A sensor is a detection device that can sense the measured information and transform the sensed information into an electrical signal or other required form of information output according to a certain rule, so as to meet the requirements of information transmission, processing, storage, display, recording and control.

[0003] Currently, traditional liquid level sensors are all installed at fixed positions where the liquid level needs to be measured. Since the length of the sensor probe is fixed, the sensor cannot adjust the length of the probe based on the depth of different tanks. As a result, different probes need to be customized for tanks of different depths.

[0004] Therefore, it is necessary to provide a liquid level sensor to address the aforementioned technical problems.

[0005] The information disclosed in this background section is intended only to enhance the understanding of the overall background of this utility model and should not be construed as an admission or in any way implying that the information constitutes prior art known to those skilled in the art. Utility Model Content

[0006] The purpose of this invention is to provide a liquid level sensor that can solve the problem that the extension length of the sensing probe in existing liquid level sensors cannot be adjusted.

[0007] To achieve the above objectives, the technical solution provided by a specific embodiment of this utility model is as follows:

[0008] A liquid level sensor includes: a float rail, a float, and a mounting mechanism.

[0009] A sensing probe is fixed to the back of the float rail, and an instrument is mounted on the upper end of the sensing probe. The float is slidably disposed within the float rail, and a magnet is detachably installed inside the float. The mounting mechanism is slidably disposed on the float rail and the sensing probe, and the mounting mechanism includes a support, a locking assembly, a mounting back plate, and a clamping assembly. The support has grooves adapted to the float rail and the sensing probe. The locking assembly is installed between the float rail and the support to lock the support and the sensing probe together. The mounting back plate is mounted on the side wall of the support, and a pair of clamping bodies and a pair of fixed shafts are mounted on the support. The clamping assembly is mounted on the pair of fixed shafts and, together with the clamping bodies, clamps the mounting back plate to the outer edge of the tank.

[0010] In one embodiment of this utility model, the float has a mounting groove, and the magnet is inserted into the mounting groove. The magnet is detachably inserted into the mounting groove, and can be removed from the mounting groove and replaced with a new magnet after the magnet has been demagnetized from prolonged use.

[0011] In one embodiment of the present invention, an annular groove is formed on the inner wall of the mounting groove near the opening. A locking assembly is fitted inside the annular groove and is located on the outside of the magnet block. The magnet block can be locked in the mounting groove by the locking assembly in the annular groove.

[0012] In one embodiment of this utility model, the card assembly includes: an elastic card body, multiple stops, and a pair of handles. The elastic card body is engaged within an annular slot. The multiple stops are fixed to the inner wall of the elastic card body. The pair of handles are respectively fixed to both ends of the elastic card body. When the magnet is installed into the mounting slot, the pair of handles causes the elastic card body to tighten inwards. Then, the elastic card body is placed in the annular slot and released, allowing it to engage with the magnet. When the magnet needs to be removed, the pair of handles again cause the elastic card body to tighten inwards, then the elastic card body is removed from the annular slot, allowing the magnet to be removed for replacement.

[0013] In one embodiment of the present invention, a pair of support ribs are fixed on the side wall of the mounting back plate near the support and at the bottom of the support, and the pair of support ribs provide support force to the support from the bottom.

[0014] In one embodiment of this utility model, a guide plate adapted to the sensing probe is fixed on the support. The guide plate is used to provide a lateral support force for the float rail and the sensing probe to prevent the float rail and the sensing probe from tilting on the support.

[0015] In one embodiment of this utility model, the locking assembly includes a threaded rod and a clamping plate. The threaded rod is threadedly connected to the side of the support away from the mounting back plate, and one end of the threaded rod is disposed within the float rail. The clamping plate is rotatably disposed at the end of the threaded rod disposed within the float rail. By rotating the threaded rod, the threaded rod drives the clamping plate to lock against the inner wall of the float rail, thereby locking and fixing the support, the float rail, and the sensing probe together.

[0016] In one embodiment of this utility model, a handle is installed at one end of the threaded rod outside the support, and the threaded rod is rotated by the handle.

[0017] In one embodiment of this utility model, the clamping assembly includes: a pair of eccentric clamps, a first control rod, a pair of second control rods, and a pin. The pair of eccentric clamps rotate on a pair of fixed shafts. The first control rod and the pair of second control rods are fixed to the pair of fixed shafts, with the first control rod positioned between the pair of second control rods. The pin is inserted into the first control rod and the pair of second control rods. When the mounting backplate is snapped onto the outer edge of the barrel, the pair of clamps and the pair of fixed shafts are positioned on the inner and outer sides of the barrel, respectively. Finally, the first and second control rods drive the pair of eccentric clamps to rotate, clamping them against the barrel wall. The pin then secures the first and second control rods together.

[0018] In one embodiment of this utility model, the first control rod and a pair of second control rods are each drilled with a plurality of corresponding insertion holes, and the pin is inserted into the insertion holes.

[0019] Compared with the prior art, this utility model, through its structural design, can adjust the length of the sensing probe extension according to the depth of different barrels, thereby effectively improving the practicality of the sensor. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a perspective view of a liquid level sensor according to an embodiment of the present invention;

[0022] Figure 2 This is a schematic diagram of the structure of the float slide rail in one embodiment of the present invention;

[0023] Figure 3 This is a schematic diagram of the structure of the float and the magnet block in one embodiment of the present invention;

[0024] Figure 4 This is a schematic diagram of the installation mechanism in one embodiment of the present invention;

[0025] Figure 5 This is a schematic diagram of the clamping assembly in one embodiment of the present invention.

[0026] Explanation of key figure labels:

[0027] 1-Float slide rail, 101-Induction probe, 102-Instrument, 103-Float, 104-Magnet block, 105-Mounting groove, 106-Annular slot, 107-Elastic clamping body, 108-Stop, 109-Handle, 2-Mounting mechanism, 201-Support, 202-Mounting back plate, 203-Guide plate, 204-Slide groove, 205-Threaded rod, 206-Clamping plate, 207-Handle, 208-Support rib, 209-Clamping body, 210-Fixed shaft, 211-Clamping assembly, 212-Eccentric clamping body, 213-First control rod, 214-Second control rod, 215-Socket, 216-Pin. Detailed Implementation

[0028] To enable those skilled in the art to better understand the technical solutions in this disclosure, the technical solutions in the embodiments of this disclosure will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this disclosure, and not all embodiments. Based on the embodiments in this disclosure, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of this disclosure.

[0029] like Figures 1 to 5 As shown, a liquid level sensor in one embodiment of the present invention includes: a float rail 1, a float 103, and a mounting mechanism 2.

[0030] like Figures 1 to 5 As shown, a sensing probe 101 is fixed to the back side of the float rail 1, and an instrument 102 is mounted on the upper end of the sensing probe 101. A float 103 is slidably disposed within the float rail 1, and a magnet 104 is detachably installed within the float 103. A mounting mechanism 2 is slidably disposed on the float rail 1 and the sensing probe 101. The mounting mechanism 2 includes a support 201, a locking assembly, a mounting back plate 202, and a clamping assembly 211. The support 201 has grooves 204 that are adapted to the float rail 1 and the sensing probe 101. The locking assembly is installed between the float rail 1 and the support 201 to lock the support 201 and the sensing probe 101 together. The mounting back plate 202 is mounted on the side wall of the support 201, and a pair of clamping bodies 209 and a pair of fixed shafts 210 are mounted on the support 201. The clamping assembly 211 is mounted on a pair of fixed shafts 210 and is used together with the clamping body 209 to clamp the mounting back plate 202 to the outer edge of the barrel.

[0031] In use, first, attach the mounting backplate 202 to the upper edge of the tank body, with a pair of clamping bodies 209 and a pair of fixing shafts 210 respectively located on the inner and outer sides of the tank body. Then, clamp the mounting backplate 202 to the upper edge of the tank body using the clamping assembly 211. Next, loosen the locking state between the support 201 and the float slide rail 1 and the sensing probe 101 using the locking assembly. Then, slide the float slide rail 1 and the sensing probe 101 up and down on the support 201 until the bottom ends of the float slide rail 1 and the sensing probe 101 extend into the lowest part of the tank body. Finally, lock the support 201 to the float slide rail 1 and the sensing probe 101 using the locking assembly.

[0032] During the sensor test, the liquid inside the tank causes the magnet 104 to slide up and down within the float rail 1 according to the water level. The sensing probe 101 detects the water level inside the tank by sensing the magnetic force of the magnet 104 and transmits the signal to the instrument 102 for display.

[0033] like Figures 1 to 3 As shown, a mounting groove 105 is carved into the float 103, and the magnet 104 is inserted into the mounting groove 105. The magnet 104 is detachably inserted into the mounting groove 105. After the magnet 104 is demagnetized from prolonged use, it can be removed from the mounting groove 105 and replaced with a new magnet 104. An annular groove 106 is carved into the inner wall of the mounting groove 105 near the opening. A locking assembly is inserted into the annular groove 106, and the locking assembly is located on the outside of the magnet 104. The magnet 104 is thus locked into the mounting groove 105 by the locking assembly in the annular groove 106.

[0034] like Figures 1 to 3 As shown, the card assembly includes: an elastic card body 107, multiple stops 108, and a pair of handles 109. The elastic card body 107 is engaged within the annular slot 106. The multiple stops 108 are all fixed to the inner sidewall of the elastic card body 107. The pair of handles 109 are respectively fixed to both ends of the elastic card body 107. When the magnet block 104 is installed into the mounting slot 105, the pair of handles 109 causes the elastic card body 107 to tighten inward. Then, the elastic card body 107 is released at the annular slot 106, and the elastic card body 107 can be engaged in the annular slot 106, thus engaging the magnet block 104 in the mounting slot 105. When it is necessary to remove the magnet block 104, the pair of handles 109 are used to tighten the elastic card body 107 inward, and then the elastic card body 107 is removed from the annular slot 106, after which the magnet block 104 can be removed for replacement.

[0035] like Figures 4 to 5As shown, a pair of support ribs 208 are fixed on the side wall of the mounting plate 202 near the support 201 and at the bottom of the support 201. The pair of support ribs 208 provide support force to the support 201 from the bottom. A guide plate 203 adapted to the sensing probe 101 is fixed on the support 201. The guide plate 203 is used to provide lateral support force for the float rail 1 and the sensing probe 101 to prevent the float rail 1 and the sensing probe 101 from tilting on the support 201.

[0036] like Figures 4 to 5 As shown, the locking assembly includes a threaded rod 205 and a clamping plate 206. The threaded rod 205 is threadedly connected to the side of the support 201 away from the mounting back plate 202, and one end of it is located inside the float rail 1. The clamping plate 206 is rotatably mounted on the end of the threaded rod 205 located inside the float rail 1. By rotating the threaded rod 205, the threaded rod 205 drives the clamping plate 206 to lock against the inner wall of the float rail 1, thereby locking and fixing the support 201 to the float rail 1 and the sensing probe 101. A handle 207 is installed on the end of the threaded rod 205 located outside the support 201, and the handle 207 drives the threaded rod 205 to rotate.

[0037] like Figures 4 to 5 As shown, the clamping assembly 211 includes: a pair of eccentric clamping bodies 212, a first control rod 213, a pair of second control rods 214, and a pin 216. The pair of eccentric clamping bodies 212 rotate on a pair of fixed shafts 210. The first control rod 213 and the pair of second control rods 214 are fixed to the pair of fixed shafts 210, with the first control rod 213 positioned between the pair of second control rods 214. The pin 216 is inserted into the first control rod 213 and the pair of second control rods 214. When the mounting backplate 202 is snapped onto the outer edge of the barrel, the pair of clamping bodies 209 and the pair of fixed shafts 210 are respectively positioned on the inner and outer sides of the barrel. Finally, the first control rod 213 and the second control rods 214 drive the pair of eccentric clamping bodies 212 to rotate, clamping the pair of eccentric clamping bodies 212 and the pair of clamping bodies 209 onto the barrel wall. Then, the pin 216 secures the first control rod 213 and the second control rod 214 together. Both the first control lever 213 and the pair of second control levers 214 have multiple corresponding insertion holes 215, and the pins 216 are inserted into the insertion holes 215.

[0038] Working principle: When using this device, firstly, the mounting back plate 202 is clamped onto the upper edge of the barrel, and a pair of clamping bodies 209 and a pair of fixing shafts 210 are respectively located on the inner and outer sides of the barrel. Then, the first control rod 213 and the second control rod 214 drive the pair of eccentric clamping bodies 212 to rotate, so that the pair of eccentric clamping bodies 212 and the pair of clamping bodies 209 are clamped onto the barrel wall. Then, the first control rod 213 and the second control rod 214 are fixed together by the pin 216, thereby clamping the mounting back plate 202 onto the upper edge of the barrel.

[0039] Then, by rotating the threaded rod 205 through the handle 207, the threaded rod 205 moves the clamping plate 206, loosening the locking state between the support 201 and the float slide rail 1 and the sensing probe 101. Then, the float slide rail 1 and the sensing probe 101 slide up and down on the support 201, so that the bottom ends of the float slide rail 1 and the sensing probe 101 extend into the lowest end of the barrel. Then, by rotating the threaded rod 205 through the handle 207, the threaded rod 205 moves the clamping plate 206 to lock against the inner wall of the float slide rail 1, thereby locking and fixing the support 201 with the float slide rail 1 and the sensing probe 101.

[0040] During the sensor test, the liquid inside the tank causes the magnet 104 to slide up and down within the float rail 1 according to the water level. The sensing probe 101 detects the water level inside the tank by sensing the magnetic force of the magnet 104 and transmits the signal to the instrument 102 for display.

[0041] It will be apparent to those skilled in the art that this disclosure is not limited to the details of the exemplary embodiments described above, and that this disclosure can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of this disclosure is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within this disclosure. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0042] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A liquid level sensor, characterized in that, include: A float slide rail, with a sensing probe fixed to its back side, and an instrument mounted on the upper end of the sensing probe; A float, slidably disposed within a float rail, wherein a magnet is detachably installed within the float; and The mounting mechanism is slidably mounted on the float rail and the sensor probe. The mounting mechanism includes a support, a locking assembly, a mounting back plate, and a clamping assembly. The support has grooves adapted to the float rail and the sensor probe. The locking assembly is installed between the float rail and the support to lock the support and the sensor probe together. The mounting back plate is mounted on the side wall of the support. A pair of clamping bodies and a pair of fixed shafts are mounted on the support. The clamping assembly is mounted on the pair of fixed shafts and is used together with the clamping bodies to clamp the mounting back plate to the outer edge of the barrel.

2. A liquid level sensor according to claim 1, characterized in that, The float has a mounting groove, and the magnet is inserted into the mounting groove.

3. A liquid level sensor according to claim 2, characterized in that, An annular groove is carved on the inner wall of the mounting slot near the opening. A card body assembly is fitted into the annular groove, and the card body assembly is located on the outside of the magnet block.

4. A liquid level sensor according to claim 3, characterized in that, The card body assembly includes: The elastic card body is engaged in the annular slot; Multiple stops are fixed to the inner wall of the elastic card body; and A pair of handles are fixed to both ends of the elastic card body.

5. A liquid level sensor according to claim 1, characterized in that, The mounting back plate is located on one side wall of the support and is fixed at the bottom of the support with a pair of support ribs.

6. A liquid level sensor according to claim 1, characterized in that, A guide plate adapted to the induction probe is fixed on the support.

7. A liquid level sensor according to claim 1, characterized in that, The locking assembly includes: A threaded rod, threadedly connected to the support on the side away from the mounting backplate, with one end located within the float rail; and The clamping plate is rotatably mounted on one end of the threaded rod located within the float slide rail.

8. A liquid level sensor according to claim 7, characterized in that, A handle is installed at one end of the threaded rod outside the support.

9. A liquid level sensor according to claim 1, characterized in that, The clamping assembly includes: A pair of eccentric clamps, each rotating on a pair of fixed shafts; A first control lever and a pair of second control levers are respectively fixed on a pair of fixed shafts, with the first control lever positioned between the pair of second control levers; and A latch is inserted into the first control lever and a pair of second control levers.

10. A liquid level sensor according to claim 9, characterized in that, The first control lever and the pair of second control levers each have multiple corresponding insertion holes, and the pins are inserted into the insertion holes.

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