A buoyancy type drinking water reservoir water level grading early warning device

Abstract

The utility model discloses a kind of buoyancy type drinking water reservoir water level grading early warning devices, the device includes the detection box of rectangular section, the detection box includes the upper box body higher than ground and the lower box body below ground, the lower box body is slidably provided with three groups of float, the upper box body is slidably provided with induction cover, three groups of float upper end are all provided with push barrel, the upper box body is provided with two groups of induction switch with sound-light alarm electric connection, it includes upper high water level induction switch and lower low water level induction switch, the push barrel upper end of three groups of float is all screw thread connection with top rod, relative screw top rod makes the upper end surface of three groups of top rod flush.The utility model is triggered by three groups of float redundancy, keep dry by hierarchical setting when top float is in normal water level, effectively avoid the jamming caused by biological adhesion, and realize buoyancy compensation adjustment by screw thread top rod, improve the operation reliability and maintainability of device.

Description

Technical Field

[0001] This utility model relates to the field of water level monitoring and early warning technology, specifically to a buoyancy-type drinking water reservoir water level classification and early warning device. Background Technology

[0002] Water level monitoring and early warning in drinking water reservoirs are crucial for ensuring water supply security and flood control. Existing reservoir water level monitoring devices mainly fall into two categories: electronic (such as ultrasonic, radar, and pressure types) and mechanical (such as float types). Electronic devices are expensive and complex to maintain, while traditional mechanical float-type early warning devices, although relatively simple in structure and highly reliable, also have significant drawbacks:

[0003] In practical applications, the float is in constant contact with water, making it susceptible to the growth of algae and other microorganisms from the reservoir water. This increases the sliding friction resistance between the float and the guide components, causing sluggish movement or even jamming, severely affecting the triggering of the alarm switch.

[0004] Traditional buoyancy-based early warning devices typically use only one set of floats, a design lacking redundant triggering mechanisms. When this float becomes stuck and malfunctions due to biofouling, the entire early warning system will be completely paralyzed and unable to issue an alarm. For systems relying on mechanical triggering, this "single-point failure" is extremely fatal. Furthermore, when the effective buoyancy of the float changes due to aging, water ingress, or microbial adhesion, traditional float-based early warning devices lack corresponding adjustment mechanisms to compensate for this deviation, thus requiring float replacement, making maintenance inconvenient.

[0005] Therefore, there is an urgent need to design a buoyancy-based drinking water reservoir water level classification and early warning device to solve the above problems. Utility Model Content

[0006] The purpose of this invention is to overcome the shortcomings of existing technologies and provide a buoyancy-based drinking water reservoir water level classification and early warning device. This device aims to solve the problems of traditional buoyancy devices, such as the tendency for floats to become stuck due to biological adhesion from long-term contact with water, the lack of redundant triggering mechanisms, and the difficulty in adjusting and diagnosing changes in buoyancy, thereby significantly improving the operational reliability and maintainability of the device.

[0007] The technical solution adopted by this utility model to solve the above problems is: a buoyancy-type drinking water reservoir water level classification and early warning device, including a detection box with a rectangular cross section. The detection box includes an upper box body set above the ground and a lower box body set below the ground. Three sets of floats are slidably arranged in the lower box body. A sensor cover is slidably arranged in the upper box body. A pusher is provided at the upper end of each of the three sets of floats. The upper box body is provided with two sets of induction switches electrically connected to the sound and light alarm, including a high water level induction switch at the top and a low water level induction switch at the bottom. The upper end of the pusher of each of the three sets of floats is threadedly connected to a top rod. The top rods are screwed together so that the upper end surfaces of the three sets of top rods are flush.

[0008] Preferably, the lower box body is provided with three sets of sliding grooves of different lengths, and the three sets of floats are provided with sliders that are slidably connected and adapted to one of the sets of sliding grooves. The three sets of floats, from bottom to top, include a bottom float, a middle float, and a top float. The middle float and the top float are both provided with through holes for the pusher to pass through.

[0009] Preferably, the inductive switch is detachably connected and fixed to the front side of the upper box body via a mounting base and a bracket. The two ends of the bracket are fixed to the left and right side walls of the upper box body by first threaded fasteners. The mounting base is slidably connected to the bracket and its position is fixed by second threaded fasteners.

[0010] Preferably, the mounting base has a socket, and locking bolts are screwed to both sides of the mounting base. The induction switch is inserted into the socket and its position is fixed by tightening the locking bolts.

[0011] Preferably, the bracket includes a mounting part and two sets of bending parts vertically arranged at both ends of the mounting part. The bending parts are provided with through grooves. Several sets of mounting holes are vertically and equally spaced on both sides of the upper box. The bolts of the first threaded fastener pass through the through grooves and mounting holes in sequence and are screwed and fixed to their nuts.

[0012] Preferably, the mounting part has a horizontal mounting groove, and both ends of the mounting base are provided with two sets of wing plates. The width of the mounting groove is greater than the width of the mounting base and less than the length of the mounting base. The wing plates have round holes. The length of the mounting base is pushed in along the direction of the mounting groove and rotated so that the mounting part is clamped between the two sets of wing plates at the same end of the mounting base, so that the bolts of the second threaded fastener pass through the two sets of wing plates in sequence and are screwed and fixed to their nuts.

[0013] Preferably, the sensor cover has several sets of rollers on both the left and right sides, and two sets of guide strips are provided on the inner walls of both sides of the upper box. The rollers are provided with annular grooves that are adapted to the guide strips, so that when the sensor cover slides up and down relative to the upper box, the rollers on both sides roll along the guide strips.

[0014] Preferably, the detection box is provided with a limiting block for supporting the sensor cover, and the limiting block has three sets of guide holes that are adapted to the sliding of the push cylinder.

[0015] Compared with the prior art, this utility model has the following advantages and effects:

[0016] This invention employs three sets of floats (bottom float, middle float, and top float) working together. By arranging the three sets of floats in a tiered manner from bottom to top, at the normal water level of the reservoir, only the bottom or middle float is in contact with the water, while the top float (used for high water level warning) remains above the water surface and in a dry state. Even if one set of floats (e.g., the bottom float that has been submerged for a long time) becomes stuck due to the adhesion of algae or other microorganisms mentioned in the background art, the remaining unstuck floats can still provide sufficient combined buoyancy to drive the induction cover, thereby reliably triggering the induction switch. This structure forms a redundant triggering mechanism, overcoming the single-point failure defect of traditional single float devices. Furthermore, when the buoyancy changes due to aging and wear of the floats, the deviation can be compensated by tightening the top rod to make its upper surface flush. Maintenance personnel can also visually determine whether any floats are stuck or damaged by observing whether the three sets of top rods are flush, significantly improving the maintainability of the device. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of the early warning device according to an embodiment of the present invention.

[0018] Figure 2 This is a cross-sectional view of the detection box at low water level according to an embodiment of this utility model.

[0019] Figure 3 This is a cross-sectional view of the detection box at high water level according to an embodiment of this utility model.

[0020] Figure 4 This is a schematic diagram of the structure of the box body in an embodiment of this utility model.

[0021] Figure 5 This is a schematic diagram of the installation structure of the induction switch according to an embodiment of this utility model.

[0022] Figure Numbers: Detection Box 10, Upper Box 11, Guide Strip 111, Mounting Hole 112, Lower Box 12, Slide Groove 121, Bottom Float 21, Middle Float 22, Top Float 23, Slider 24, Through Hole 25, Sensor Cover 30, Roller 31, Annular Groove 32, Push Cylinder 40, Top Rod 50, High Water Level Sensor Switch 61, Low Water Level Sensor Switch 62, Audible and Visual Alarm 70, Bracket 80, Mounting Part 81, Mounting Groove 811, Bending Part 82, Through Groove 83, Mounting Seat 90, Insert Hole 91, Locking Bolt 92, Wing Plate 93, Limiting Block 100, Guide Hole 101, First Threaded Fastener 201, Second Threaded Fastener 202. Detailed Implementation

[0023] The present invention will be further described in detail below with reference to the accompanying drawings and through embodiments. The following embodiments are explanations of the present invention, but the present invention is not limited to the following embodiments.

[0024] Example:

[0025] See Figure 1 - Figure 5 This embodiment relates to a buoyancy-type drinking water reservoir water level classification and early warning device, specifically used in natural drinking water reservoirs, water sources, and other similar locations, to provide reliable mechanical classification and early warning for key high water levels (such as flood control limits) and low water levels (such as dead water levels). Specifically, it includes a rectangular cross-section detection box 10, comprising an upper box 11 positioned above ground and a lower box 12 positioned below ground. Three sets of floats are slidably disposed within the lower box 12. A sensor cover 30 is slidably disposed on the upper box 11. Each of the three sets of floats has a pusher cylinder 40 at its upper end. The upper box 11 has two sets of induction switches (connected to a control box and equipped with corresponding power supplies) electrically connected to an audible and visual alarm 70. The induction switches include an upper high water level induction switch 61 and a lower low water level induction switch 62. Each of the pusher cylinders 40 of the three sets of floats has a threaded top rod 50 connected to its upper end. Tightening the top rods 50 makes the upper surfaces of the three sets of top rods 50 flush. In this embodiment, a flow guide hole needs to be opened at the bottom of the lower box 12.

[0026] Specifically, in this embodiment, the core design of this invention lies in utilizing the combined action of three sets of floats to provide redundant and adjustable buoyancy. These three sets of floats, through their respective push cylinders 40 and push rods 50, lift the sensing cover 30 (the buoyancy of a single set of floats is also sufficient to lift the sensing cover 30; that is, considering resistance, the buoyancy generated by a single set of floats is greater than its own weight, as well as the weight of the push cylinder 40 and the sensing cover 30). The raising and lowering of the sensing cover 30 is used to trigger induction switches (high water level induction switch 61, low water level induction switch 62) located at different heights. This invention forms a redundant triggering mechanism by setting three sets of floats. Even if one set of floats (such as the bottom float that has been submerged for a long time) becomes more resistant or stuck due to the attachment of algae and other microorganisms, the combined buoyancy provided by the remaining unstuck floats (such as the middle float and the top float that has been exposed to the water surface for a long time) is still sufficient to push the sensor cover 30 up or down, thereby reliably triggering the sensor switch (through the side of the sensor cover) and ensuring the reliability of the warning function (in this embodiment, the sensor switch can trigger the sound and light alarm 70 through a conventional microcontroller or relay, which is existing technology and will not be described in detail).

[0027] Secondly, the top rods 50 at the upper ends of the three sets of push cylinders 40 are all threaded connections. During installation, commissioning, or later maintenance, maintenance personnel can adjust the extension height of the top rods 50 by screwing them to keep the upper surfaces of the three sets of top rods 50 flush. When a float experiences a slight change in buoyancy due to aging or adhesion, this adjustment function can compensate for the change in float immersion depth, ensuring that the induction cover 30 is subjected to uniform force and rises and falls smoothly. Even if any float is not completely damaged (e.g., wear, aging, microbial adhesion, etc.), it can still function normally without immediate replacement, thus ensuring the overall service life of the device. Simultaneously, whether the three sets of top rods 50 are flush can also serve as a direct indicator of whether the floats are stuck during inspections: since the probability of all three sets of floats failing simultaneously is low, when one set of top rods 50 fails to rise, it can be determined whether the float corresponding to that top rod 50 is damaged or stuck, improving the maintainability of the device.

[0028] The lower box body 12 is provided with three sets of sliding grooves 121 of different lengths (Note: Figure 1 For clarity, this is only an illustration; in the actual structure, the lengths of the three sets of sliding grooves 121 can be set according to the stroke of the floats. Each of the three sets of floats has a slider 24 that is slidably connected to one of the sliding grooves 121. From bottom to top, the three sets of floats include a bottom float 21, a middle float 22, and a top float 23. (The bottom float 21 needs to cover the entire stroke from low to high water level, and its sliding groove 121 should be the longest; the middle float 22 is only triggered when the water level is above a certain threshold, and its sliding groove 121 can be shorter; the top float 23 is only triggered at high water level, and its sliding groove 121 is the shortest.) Both the middle float 22 and the top float 23 have perforations 25 for the pusher cylinder 40 to pass through. This tiered arrangement of floats (bottom float 21, middle float 22, and top float 23) is the key solution of this invention to address the problem of "biological attachment causing jamming" in the prior art. Through a tiered arrangement from bottom to top, and with perforations 25 on the middle and top floats 22 (allowing the pusher 40 below to pass through), only the bottom float 21 or the middle float 22 is in long-term contact with the water when the reservoir is at normal or low water levels, while the top float 23 (and even the middle float 22) remains above the water surface, in a dry state. This avoids the problem of algae attachment and clogging that can occur with the floats (top float 23) used for high water level warnings due to prolonged contact with water. Only when the water level rises abnormally to a high level will the relatively clean top float 23 come into contact with the water and rise sensitively, ensuring the reliability of high water level warnings.

[0029] The inductive switch in this embodiment adopts a detachable connection structure design. Specifically, the inductive switch is detachably connected and fixed to the front side of the upper box 11 via a mounting base 90 and a bracket 80. The two ends of the bracket 80 are fixed to the left and right side walls of the upper box 11 via first threaded fasteners 201. The mounting base 90 is slidably connected to the bracket 80 and its position is fixed by second threaded fasteners 202.

[0030] See Figure 5 The mounting base 90 has a socket 91, and locking bolts 92 are screwed onto both sides of the mounting base 90. The inductive switch passes through the socket 91 and is fixed in position by tightening the locking bolts 92. The inductive switch (usually a cylindrical proximity switch or magnetic switch) can be directly inserted into the socket 91. By tightening the locking bolts 92 on both sides of the mounting base 90, the ends of the bolts press or clamp the side wall of the inductive switch, thus firmly fixing it in place. When it is necessary to replace a failed inductive switch, maintenance personnel only need to loosen the locking bolts 92 in the reverse direction to quickly remove and replace it, which is simple and convenient.

[0031] In this embodiment, the connection between the bracket 80 and the upper box 11 enables vertical adjustment of the warning water level. Specifically, the bracket 80 includes a mounting part 81 and two sets of bent parts 82 vertically disposed at both ends of the mounting part 81. The bent parts 82 have through grooves 83. Several sets of mounting holes 112 are vertically and equally spaced on both side walls of the upper box 11. The bolts of the first threaded fastener 201 pass through the through grooves 83 and the mounting holes 112 in sequence and are screwed to connect and fix with their nuts. During installation, a suitable mounting hole 112 can be selected, and the bolts of the first threaded fastener 201 can pass through the through grooves 83 and the mounting holes 112, and the nuts can be tightened to achieve the installation and fixation of the bracket 80 at different height positions on the upper box 11.

[0032] In this embodiment, the bracket 80 can be equipped with multiple sets of induction switches. Specifically, its mounting part 81 has a horizontal mounting groove 811. Both ends of the mounting base 90 are provided with two sets of wing plates 93. The width of the mounting groove 811 is greater than the width of the mounting base 90 and less than the length of the mounting base 90. The wing plates 93 have round holes. The length of the mounting base 90 is pushed in and rotated (for example, 90°) along the direction of the mounting groove 811 so that the mounting part 81 is clamped between the two sets of wing plates 93 at the same end of the mounting base 90, so that the wing plates 93 and the mounting part 81 form a limit, so that the bolt of the second threaded fastener 202 passes through the two sets of wing plates 93 in sequence and is screwed and fixed to its nut.

[0033] To reduce the frictional resistance during the vertical movement of the sensor cover 30, several sets of rollers 31 are provided on both the left and right sides of the sensor cover 30. Two sets of guide strips 111 are provided on the inner walls of both sides of the upper box 11. The rollers 31 have annular grooves 32 that are adapted to the guide strips 111, so that when the sensor cover 30 slides up and down relative to the upper box 11, the rollers 31 on both sides roll along the guide strips 111. By replacing sliding friction with rolling friction, the frictional resistance during the vertical movement of the sensor cover 30 is reduced, so that the float only needs to overcome a small amount of mechanical resistance to push the sensor cover 30 and trigger the switch, ensuring the sensitivity of the device.

[0034] The detection box 10 is equipped with a limiting block 100 for supporting the sensor cover 30. The limiting block 100 has three sets of guide holes 101 that are adapted to slide with the push cylinder 40. The limiting block 100 has a dual function: Firstly, the limiting block 100 provides support for the sensor cover 30 at its lowest position. When the water level drops to the lowest point and all floats fall, the sensor cover 30 will fall and be stably supported on the limiting block 100, providing a reference point for the calibration of the low water level sensor switch 62. Secondly, the limiting block 100 guides the up-and-down sliding of the push cylinder 40 through the guide holes 101, effectively preventing jamming caused by the overall tilting of the floats due to the tilting of the push cylinder 40.

[0035] The above description in this specification is merely illustrative of the present invention. Those skilled in the art to which this invention pertains may make various modifications or additions to the described specific embodiments or use similar methods to replace them, as long as they do not depart from the content of this specification or exceed the scope defined in the claims, all of which shall fall within the protection scope of this invention.

Claims

1. A buoyancy-based drinking water reservoir water level classification and early warning device, characterized in that, The detection box includes a rectangular cross-section, comprising an upper box body positioned above ground and a lower box body positioned below ground. Three sets of floats are slidably disposed within the lower box body. A sensor cover is slidably disposed within the upper box body. Each of the three sets of floats has a pusher cylinder at its upper end. The upper box body is equipped with two sets of inductive switches electrically connected to an audible and visual alarm, including a high water level inductive switch at the top and a low water level inductive switch at the bottom. Each of the pusher cylinders of the three sets of floats has a push rod threadedly connected to its upper end. The push rods are screwed together so that the upper surfaces of the three push rods are flush.

2. The water level grading early warning device for drinking water reservoir according to claim 1, characterized in that: The lower box body is provided with three sets of sliding grooves of different lengths. Each of the three sets of floats is equipped with a slider that is slidably connected to one of the sliding grooves. The three sets of floats, from bottom to top, include a bottom float, a middle float, and a top float. Both the middle float and the top float are provided with through holes for the pusher to pass through.

3. The water level grading early warning device for drinking water reservoir according to claim 2, characterized in that: The inductive switch is detachably connected and fixed to the front side of the upper box via a mounting base and a bracket. The two ends of the bracket are fixed to the left and right side walls of the upper box via first threaded fasteners. The mounting base is slidably connected to the bracket and fixed in position via second threaded fasteners.

4. The water level grading early warning device for drinking water reservoir according to claim 3, characterized in that: The mounting base has a socket, and locking bolts are screwed to both sides of the mounting base. The induction switch is inserted into the socket and its position is fixed by tightening the locking bolts.

5. The water level grading early warning device for drinking water reservoir according to claim 3, characterized in that: The bracket includes a mounting section and two sets of bending sections vertically disposed at both ends of the mounting section. The bending sections have through grooves. Several sets of mounting holes are vertically and equally spaced on both sides of the upper box. The bolts of the first threaded fastener pass through the through grooves and mounting holes in sequence and are screwed and fixed to their nuts.

6. The water level grading early warning device for drinking water reservoir according to claim 5, characterized in that: The mounting part is provided with a horizontal mounting groove. Both ends of the mounting base are provided with two sets of wing plates. The width of the mounting groove is greater than the width of the mounting base and less than the length of the mounting base. The wing plates are provided with round holes. The length of the mounting base is pushed in along the direction of the mounting groove and rotated so that the mounting part is clamped between the two sets of wing plates at the same end of the mounting base. The bolts of the second threaded fastener pass through the two sets of wing plates in sequence and are screwed and fixed to their nuts.

7. The water level grading early warning device for drinking water reservoir according to claim 1, characterized in that: The sensor cover has several sets of rollers on both the left and right sides, and two sets of guide strips are provided on the inner walls of both sides of the upper box. The rollers are provided with annular grooves that match the guide strips, so that when the sensor cover slides up and down relative to the upper box, the rollers on both sides roll along the guide strips.

8. The water level grading early warning device for drinking water reservoir according to claim 1, characterized in that: The detection box is equipped with a limiting block for supporting the sensor cover, and the limiting block has three sets of guide holes that are adapted to the sliding of the push cylinder.

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